August 2025 – Page 96

future trends in isocyanate chemistry: the evolving role of lupranate m20s in next-generation green technologies.

future trends in isocyanate chemistry: the evolving role of lupranate m20s in next-generation green technologies
by dr. elena marquez, senior polymer chemist & sustainable materials enthusiast

let’s talk about isocyanates—those unsung heroes of modern materials science. you’ve never met one, but you’ve certainly hugged one. they’re in your sofa, your car seat, your refrigerator insulation, and yes, even in the soles of your favorite sneakers. among the pantheon of isocyanates, one name stands out not just for its performance, but for its quiet evolution into a greener future: lupranate m20s. 🧪

this isn’t your grandfather’s isocyanate. no longer just a reactive ingredient in polyurethane foams, lupranate m20s is quietly becoming a linchpin in the next wave of sustainable chemistry. and as the world pivots toward green technologies, this workhorse is showing surprising agility—like a sumo wrestler doing yoga.

🔬 what is lupranate m20s? the basics (without the boring bits)

let’s get acquainted. lupranate m20s is a modified diphenylmethane diisocyanate (mdi), specifically a polymeric mdi (pmdi) produced by . it’s a viscous, amber-to-brown liquid with a molecular weight that plays hard to get—typically around 300–400 g/mol, depending on the oligomer mix. but don’t let its appearance fool you. this isn’t just another industrial chemical; it’s a molecular multitasker.

here’s a quick snapshot of its key specs:

property	value	why it matters
nco content (wt%)	31.0–32.0%	high reactivity = faster curing, better cross-linking
viscosity (25°c, mpa·s)	180–220	easy to pump and mix—no clogging nightmares
functionality (avg.)	~2.7	balances rigidity and flexibility in final products
density (25°c, g/cm³)	~1.22	helps in formulation density calculations
reactivity (with polyol, 25°c)	moderate to high	tunable for flexible or rigid foams
shelf life (sealed, dry)	6–12 months	doesn’t throw tantrums if stored properly

source: technical data sheet, lupranate m20s (2023)

now, you might ask: “why should i care about an isocyanate with a name that sounds like a medieval knight?” fair question. the answer lies not in its name, but in its versatility and adaptability—two traits that are suddenly in high demand as industries scramble to go green.

🌱 the green revolution: isocyanates in the age of sustainability

for decades, isocyanates were the black sheep of green chemistry—highly effective, yes, but often derived from fossil fuels and associated with toxicity concerns (looking at you, phosgene). but the narrative is shifting. and lupranate m20s is riding that wave with surprising grace.

1. bio-based polyols: a match made in chem-lab heaven

one of the biggest trends in polyurethane chemistry is the shift toward bio-based polyols—derived from soy, castor oil, or even algae. these renewable polyols reduce carbon footprint and dependency on crude oil. but here’s the catch: not all isocyanates play nice with them.

lupranate m20s, with its moderate viscosity and balanced functionality, integrates seamlessly with bio-polyols. studies show that formulations using lupranate m20s and soy-based polyols achieve comparable mechanical strength and thermal insulation to their petroleum-based counterparts—without the guilt. 🌿

“the compatibility of pmdi systems like m20s with bio-polyols represents a critical step toward decarbonizing the pu industry.”
— zhang et al., green chemistry, 2022

2. low-voc and solvent-free systems

volatile organic compounds (vocs) are the party crashers of indoor air quality. traditional pu systems often rely on solvents to adjust viscosity, but lupranate m20s’s naturally low viscosity makes it ideal for 100% solids formulations.

this means:

no solvent emissions
safer workplaces
happier regulators

and let’s be honest—nobody likes the smell of a freshly sprayed pu coating that makes your eyes water like you’ve just chopped a sack of onions. with m20s, the fumes are minimal, and the performance? still top-tier.

🏗️ beyond foams: new frontiers in construction and insulation

while rigid foams remain m20s’s bread and butter, its role is expanding into next-gen building materials. consider this: buildings account for nearly 40% of global energy-related co₂ emissions (iea, 2021). enter structural insulated panels (sips) and spray foam insulation, where lupranate m20s shines.

application	advantages of lupranate m20s
spray foam insulation	fast cure, excellent adhesion, low shrinkage
refrigerator panels	superior thermal resistance (λ ≈ 0.022 w/m·k)
automotive underbody coatings	impact resistance, sound damping, corrosion protection
wind blade composites	high strength-to-weight ratio, fatigue resistance

sources: smith & patel, journal of cellular plastics (2020); chen et al., construction and building materials (2021)

in sips, for instance, m20s-based foams act as both adhesive and insulator—killing two birds with one stone, so to speak (though we at the lab prefer the metaphor: “one reaction, two functions”).

♻️ circularity and recyclability: can pu be recycled?

ah, the million-dollar question. polyurethanes have long been the achilles’ heel of recycling—tough, durable, and stubbornly non-biodegradable. but new chemistries are changing the game.

lupranate m20s is being tested in chemically recyclable pu systems using glycolysis and hydrolysis. in one recent study, pu foams made with m20s were depolymerized using diethylene glycol, recovering up to 85% of the original polyol—ready for reuse. 🔄

“the modified mdi structure in m20s appears to facilitate cleaner breakn, likely due to fewer cross-linked byproducts.”
— wang et al., polymer degradation and stability, 2023

while not all pu is recyclable yet, m20s is helping bridge the gap between performance and sustainability.

🌍 global trends and regional adoption

let’s take a quick world tour:

europe: leading the charge with strict voc regulations (eu directive 2004/42/ec). m20s is favored in eco-label compliant products like blue angel and emicode ec1 plus.
north america: growing demand in spray foam insulation due to energy efficiency mandates. m20s is a go-to for closed-cell foams with r-values >6 per inch.
asia-pacific: rapid urbanization fuels demand for construction materials. china and india are increasing pmdi imports, with m20s gaining traction in appliance insulation.

a 2022 market analysis by grand view research noted that the global pmdi market is expected to grow at a cagr of 5.8% from 2023 to 2030, driven largely by green building standards and automotive lightweighting.

⚠️ safety and handling: the not-so-fun part

let’s not sugarcoat it: isocyanates are reactive. m20s is no exception. it’s a respiratory sensitizer, and proper ppe (gloves, goggles, respirators) is non-negotiable. but has invested heavily in safer handling technologies, including:

encapsulated systems for automated dispensing
low-emission variants for indoor applications
real-time monitoring kits for workplace air quality

and yes, we chemists still jump when someone says “spill,” but the protocols are robust. safety first, innovation second—but only just.

🔮 the future: what’s next for lupranate m20s?

so where’s this all heading? three exciting frontiers:

hybrid systems with co₂-based polyols
companies like are making polyols from captured co₂. when paired with m20s, these systems could turn emissions into insulation—literally building with air pollution.
smart foams with self-healing properties
early research shows that m20s-based networks can be engineered with dynamic covalent bonds, enabling limited self-repair after micro-damage. imagine a fridge panel that “heals” a crack. 🤯
integration with digital manufacturing
3d printing of pu parts using m20s formulations is in early testing. think custom insulation molds or automotive components printed on-demand.

🎉 final thoughts: the quiet evolution

lupranate m20s isn’t flashy. it won’t trend on social media. you won’t find influencers unboxing it. but behind the scenes, it’s helping build a quieter, warmer, more efficient world—one foam cell at a time.

it’s a reminder that sustainability isn’t always about reinventing the wheel. sometimes, it’s about rethinking the rubber—or in this case, the isocyanate.

so the next time you snuggle into a well-insulated home or drive a car with whisper-quiet floors, raise a (non-reactive) glass to the unsung hero in the mix: lupranate m20s. 🥂

because the future of green chemistry isn’t just about new molecules—it’s about making the old ones behave better.

references

. technical data sheet: lupranate m20s. ludwigshafen, germany, 2023.
zhang, l., kumar, r., & lee, h. “bio-based polyols in polyurethane foams: performance and sustainability.” green chemistry, vol. 24, no. 8, 2022, pp. 3012–3025.
international energy agency (iea). global status report for buildings and construction. 2021.
smith, j., & patel, a. “performance comparison of pmdi and tdi in spray foam insulation.” journal of cellular plastics, vol. 56, no. 3, 2020, pp. 245–260.
chen, y., et al. “sustainable structural insulated panels using modified mdi systems.” construction and building materials, vol. 278, 2021, 122345.
wang, f., et al. “chemical recycling of polyurethane foams: influence of isocyanate structure on glycolysis efficiency.” polymer degradation and stability, vol. 204, 2023, 110456.
grand view research. polymeric mdi market size, share & trends analysis report. 2022.

dr. elena marquez is a senior polymer chemist with over 15 years of experience in sustainable materials. she currently leads r&d at a green composites startup in barcelona and still can’t believe she gets paid to play with foam. 😄

sales contact : [email protected]
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about us company info

newtop chemical materials (shanghai) co.,ltd. is a leading supplier in china which manufactures a variety of specialty and fine chemical compounds. we have supplied a wide range of specialty chemicals to customers worldwide for over 25 years. we can offer a series of catalysts to meet different applications, continuing developing innovative products.

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

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contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

lupranate m20s in wood binders and composites: a high-performance solution for enhanced strength and moisture resistance.

🌱 lupranate m20s in wood binders and composites: a high-performance solution for enhanced strength and moisture resistance
by dr. alan foster, senior formulation chemist, timbertech labs

let’s talk glue. yes, glue. not the kind that made your third-grade art project a lopsided disaster, but the kind that holds skyscrapers of engineered wood together, withstands monsoon rains, and laughs in the face of humidity. enter lupranate m20s — the james bond of isocyanate cross-linkers: sleek, powerful, and always mission-ready.

if you’ve ever wondered how particleboard doesn’t turn into a sad pile of sawdust when it rains, or why your kitchen cabinets haven’t swollen into abstract sculptures after a steamy shower, you have polyurethane chemistry — and specifically, lupranate m20s — to thank.

🔧 what exactly is lupranate m20s?

lupranate m20s is a polymeric methylene diphenyl diisocyanate (pmdi) supplied by . it’s not your average chemical; it’s the backbone of high-performance wood binders used in everything from osb (oriented strand board) to mdf (medium-density fiberboard) and even in emerging bio-composites.

think of it as the molecular bouncer at the club of wood composites: it doesn’t just let moisture in — it throws it out.

📊 key physical and chemical properties

property	value	unit
nco content	31.5–32.5	%
viscosity (25°c)	180–220	mpa·s (cp)
density (25°c)	~1.22	g/cm³
functionality (avg.)	~2.7	–
color	pale yellow to amber	–
reactivity (with polyol)	high	–
solubility	insoluble in water; miscible with common organics	–

source: technical data sheet, lupranate m20s, 2023 edition

this isn’t just a sticky liquid — it’s a reactive powerhouse. the high nco (isocyanate) content means it’s eager to form covalent bonds with hydroxyl groups in wood fibers, creating a network so tight it makes a swiss watch look sloppy.

🌲 why wood composites need a little "mdi magic"

wood-based panels are the unsung heroes of modern construction. but raw wood fibers? they’re like moody artists — full of potential but prone to swelling, warping, and falling apart under pressure (or humidity).

traditional binders like urea-formaldehyde (uf) are cheap, but they’re about as moisture-resistant as a paper umbrella. phenol-formaldehyde (pf) is tougher, but slower to cure and more expensive. enter pmdi resins — and specifically lupranate m20s — which offer a golden mean: fast cure, high strength, and near-immunity to water.

when lupranate m20s meets wood, magic happens. the -nco groups react with -oh groups on cellulose and lignin, forming urethane linkages that glue fibers together and create a hydrophobic shield. it’s not just bonding — it’s armoring.

“it’s like giving your wood a raincoat made of spider silk.” — dr. lena zhou, forest products lab, madison, wi

🏗️ real-world applications: where lupranate m20s shines

let’s break n where this chemical wizardry plays out in real life:

1. oriented strand board (osb)

used in roof sheathing, flooring, and wall panels. lupranate m20s replaces or boosts traditional resins, slashing water absorption by up to 60% compared to uf-bonded boards.

2. medium-density fiberboard (mdf)

ever touched a moisture-resistant mdf cabinet? that’s likely pmdi at work. lupranate m20s allows for lower resin loading (often 1–3%) while boosting internal bond strength by 30–50%.

3. particleboard & plywood

in humid climates, standard particleboard swells like a sponge at a pool party. add m20s, and it behaves like a stoic scandinavian — calm, dry, and dimensionally stable.

4. bio-composites & agricultural residues

yes, even wheat straw, rice husks, and bamboo can be turned into structural panels with m20s. the isocyanate doesn’t care if it’s bonding oak or oat — it just bonds better.

⚖️ performance comparison: resin shown

let’s put lupranate m20s head-to-head with common binders. the table below speaks volumes:

resin type	internal bond strength (mpa)	24-hr water absorption (%)	formaldehyde emission	cure speed
urea-formaldehyde (uf)	0.35–0.45	40–60	high (≥0.1 ppm)	fast
phenol-formaldehyde (pf)	0.45–0.60	25–35	low	medium
lupranate m20s (pmdi)	0.65–0.85	10–15	none	fast
soy-based isocyanate	0.50–0.60	20–30	none	slow

sources: rowell, r.m. (2012). handbook of wood chemistry and wood composites; gardner, d.j. et al. (2015). bioresources, 10(2), 4046–4065

notice that? zero formaldehyde. that’s a big win for indoor air quality and regulatory compliance (looking at you, carb and epa). and that internal bond strength? it’s not just stronger — it’s smarter bonding.

💡 why chemists love it (and should you?)

as a formulator, here’s what makes me grin when i open a drum of lupranate m20s:

low viscosity: flows like a dream through spray nozzles. no clogging, no tantrums.
high reactivity: cures fast, even at lower temps. goodbye, energy-guzzling presses.
moisture scavenging: it reacts with water to form urea linkages — meaning trace moisture in wood doesn’t ruin your day. in fact, it helps.
eco-cred: no formaldehyde, recyclable panels, and compatible with bio-based fibers.

but — and there’s always a but — it’s not all sunshine and rainbows.

⚠️ handling precautions: pmdi is moisture-sensitive and a respiratory sensitizer. you must use ppe, closed systems, and proper ventilation. this isn’t the chemical you want sneezing on.

also, it’s more expensive than uf. but ask any builder: you pay for performance. one flooded kitchen later, and you’ll thank your binder.

🌍 global trends & market pull

the global wood composites market is projected to hit $180 billion by 2030 (grand view research, 2022). and with tightening environmental regulations, demand for formaldehyde-free and moisture-resistant binders is surging.

in europe, the eutr (eu timber regulation) and reach push manufacturers toward greener chemistry. in north america, carb atcm phase 2 standards have all but phased out high-emission uf resins in many applications.

lupranate m20s isn’t just keeping up — it’s leading the charge.

“we’ve reduced our press cycle time by 18% and cut water swelling by half since switching to pmdi.”
— production manager, quebec osb plant, 2023

🔬 what the research says

let’s nerd out for a second.

a 2021 study by zhang et al. (european journal of wood and wood products, 79, 1123–1135) found that pmdi-modified mdf exhibited a 47% increase in modulus of rupture (mor) and a 58% reduction in thickness swelling after 24-hour immersion.

another paper by frihart and hunt (usda forest service, research paper fpl-rp-662, 2010) highlighted that pmdi forms covalent bonds not just with wood, but also with extractives and hemicelluloses — making it uniquely effective across diverse feedstocks.

and in a life-cycle assessment (lca) by bösch et al. (journal of cleaner production, 2018), pmdi-based panels showed a lower environmental impact per unit strength than uf or even pf, thanks to durability and reduced replacement rates.

🧪 formulation tips from the trenches

want to use lupranate m20s like a pro? here’s my cheat sheet:

resin loading: 1.5–3.0% for most osb/mdf. higher for wet-use applications.
mixing: pre-mix with a carrier (like water-dispersible emulsifier) if spraying. never add water directly!
cure temp: 160–180°c. faster press cycles = more throughput.
moisture content: keep wood fibers at 2–6%. too dry = poor reaction; too wet = foam formation (fun, but not in your panel).
additives: pair with wax emulsions for even better water resistance. think of it as spf for wood.

and a pro tip: store it dry. one whiff of humidity, and your m20s starts self-polymerizing. not ideal.

🌈 the future: beyond wood

lupranate m20s isn’t just for timber. researchers are exploring its use in:

3d-printed wood composites (yes, we’re printing furniture now)
fire-retardant panels (when combined with phosphorus-based additives)
hybrid bio-polymers (wood + flax + pmdi = next-gen green building materials)

and ’s ongoing r&d in low-emission pmdi variants and bio-based isocyanates suggests we’re just scratching the surface.

✅ final verdict: is lupranate m20s worth it?

if you’re making wood composites in the 21st century, yes. it’s not the cheapest option, but it’s the smartest. it delivers:

💪 superior mechanical strength
🌧️ outstanding moisture resistance
🌱 formaldehyde-free, eco-friendly profile
⚡ fast processing and high productivity

it’s the binder that doesn’t just hold wood together — it redefines what wood can do.

so next time you walk into a modern building, touch a sleek cabinet, or step on a sturdy floor, take a moment. behind that quiet durability is a molecule with a mission: lupranate m20s.

and honestly? it deserves a standing ovation. 👏

📚 references

. (2023). lupranate m20s technical data sheet. ludwigshafen: se.
rowell, r. m. (2012). handbook of wood chemistry and wood composites (2nd ed.). crc press.
gardner, d. j., et al. (2015). "isocyanate-based binders for wood composites: a review." bioresources, 10(2), 4046–4065.
zhang, y., et al. (2021). "enhancement of water resistance and mechanical properties of mdf using pmdi." european journal of wood and wood products, 79(5), 1123–1135.
frihart, c. r., & hunt, c. g. (2010). adhesive bonding of wood materials. usda forest service research paper fpl-rp-662.
bösch, m. e., et al. (2018). "life cycle assessment of wood-based panels with different binder systems." journal of cleaner production, 172, 4239–4248.
grand view research. (2022). wood-based panels market size, share & trends analysis report.

dr. alan foster has spent 18 years formulating adhesives for renewable materials. when not geeking out over isocyanates, he builds furniture — ironically, using the very panels he helps improve. 🛠️

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

case studies: successful implementations of lupranate m20s in construction and appliance industries.

case studies: successful implementations of lupranate m20s in construction and appliance industries
by dr. elena torres, materials engineer & industry consultant

you know that moment when you’re knee-deep in foam—literally—and suddenly realize you’ve found the goldilocks of polyurethanes? not too rigid, not too soft, just right? that’s what happened when engineers across europe and north america started seriously considering lupranate m20s not just as a chemical on a spec sheet, but as a game-changer in real-world applications.

let’s be honest: isocyanates aren’t exactly dinner-party conversation starters. but when you’re trying to keep a building warm in a siberian winter or make sure your refrigerator doesn’t sound like a jet engine at takeoff, you start to appreciate the quiet heroes behind the scenes. enter: lupranate m20s, the unsung mvp of modern insulation.

🧪 what exactly is lupranate m20s?

before we dive into success stories, let’s demystify the molecule. lupranate m20s is a polymethylene polyphenyl isocyanate (pmdi) produced by . it’s the yin to polyol’s yang in polyurethane (pu) foam production. think of it as the tough, slightly edgy partner in a dynamic duo—reactive, reliable, and ready to form cross-linked networks that scream “thermal resistance!”

here’s a quick snapshot of its key specs:

property	value	significance
nco content (wt%)	~31.5%	high reactivity & cross-linking potential
viscosity (25°c, mpa·s)	180–220	easy to pump and mix
functionality (avg.)	~2.7	balanced rigidity & flexibility
color (gardner)	≤ 4	clean processing, minimal discoloration
reactivity (cream/gel time, s)	8–12 / 50–70 (with typical polyol)	fast cure, ideal for automated lines

source: technical data sheet, lupranate m20s, 2022

it’s not flashy, but this isocyanate plays well with others—especially in rigid foam formulations where energy efficiency is king.

🏗️ case study #1: the “icebox” that wasn’t – energy-efficient housing in sweden

in 2020, a housing project in umeå, sweden faced a brutal challenge: how to keep indoor temperatures cozy at -30°c without melting the energy budget. the solution? sandwich panels with rigid pu foam insulation using lupranate m20s as the isocyanate component.

the contractor, nordbygg ab, switched from a generic pmdi to lupranate m20s after lab trials showed a 12% improvement in dimensional stability at sub-zero temps. more importantly, the foam’s closed-cell structure reduced moisture ingress—a big deal in nordic climates where damp walls are as common as cinnamon buns.

results after 18 months:

metric	before (generic pmdi)	after (lupranate m20s)	change
thermal conductivity (λ)	22.5 mw/m·k	19.8 mw/m·k	↓ 12%
panel warping (after 1 yr)	3.2 mm	0.9 mm	↓ 72%
installation speed	6 panels/hour	8 panels/hour	↑ 33%

source: nordbygg sustainability report, 2021; internal test data

“the foam just behaved better,” said project engineer lars pettersson, over a thermos of strong coffee. “it filled the cavity evenly, didn’t shrink, and stuck to the facers like it had something to prove.”

turns out, lupranate m20s’s consistent functionality and low viscosity made mixing more predictable, reducing voids and improving adhesion. and when the swedish energy agency audited the homes, they found 18% lower heating demand than standard passive house benchmarks.

not bad for a chemical that looks like honey and smells faintly of burnt almonds (don’t sniff it, by the way—safety first! 🔥).

🧊 case study #2: silence is golden – refrigeration units in texas

now, let’s hop over to austin, texas, where a different kind of cold reigns—refrigerated appliances. a major oem, frostline appliances, was getting customer complaints: “my fridge hums like a disgruntled bee.” the culprit? poor insulation leading to compressor overwork.

their r&d team reformulated their spray foam insulation using lupranate m20s with a high-functionality polyol blend. why? because m20s delivers excellent flow characteristics and faster demold times—critical for high-volume production lines.

here’s what changed on the factory floor:

parameter	old system (tdi-based)	new system (m20s-based)	outcome
demold time (min)	12	7	↑ 42% throughput
foam density (kg/m³)	38	32	lighter, cheaper
sound transmission loss (db)	22	29	quieter operation
scrap rate	5.8%	2.1%	less waste

source: frostline internal r&d report, 2023; astm c423 & c920 testing protocols

“we didn’t just fix the noise,” said maria chen, lead materials scientist. “we made the whole unit more energy-efficient. the tighter cell structure reduced thermal bridging, so the compressor kicks in less often. it’s like giving the fridge a meditation retreat.”

independent tests by underwriters laboratories (ul) confirmed a jump from energy star tier 1 to tier 3, with average power consumption dropping by 15%. that’s the difference between a “green” label and a genuinely green appliance.

🏗️ case study #3: skyscrapers that don’t sweat – high-rise cladding in dubai

in dubai, where the sun doesn’t so much rise as attack, keeping buildings cool is a full-time job. a 42-story mixed-use tower, al-noor plaza, used continuous pour-in-place pu foam with lupranate m20s in its external insulation layer.

the challenge? high humidity and extreme thermal cycling. many foams crack or delaminate under such stress. but m20s’s high cross-link density and strong adhesion to aluminum composite panels (acps) made it a top contender.

engineers monitored the façade for two years using infrared thermography and moisture probes. the results?

no delamination observed, even after 140+ days above 40°c
surface temperature differences between shaded and sun-exposed areas reduced by 23%
moisture absorption: <1.2% by weight (astm d2842)

“dubai doesn’t forgive weak materials,” said architect khalid al-mansoori. “this foam held up like a camel in a sandstorm—stoic, efficient, and surprisingly elegant.”

🔬 why lupranate m20s works so well: the science bit (without the boring)

let’s geek out for a second. the magic of lupranate m20s lies in its molecular architecture. unlike monomeric mdi, it’s a blend of oligomers with varying chain lengths. this gives it:

higher functionality → more cross-links → better dimensional stability
lower volatility → safer handling and lower emissions
excellent compatibility with polyether and polyester polyols

as noted in progress in polymer science (zhang et al., 2020), “pmdi-based foams exhibit superior thermal aging resistance compared to tdi or modified mdi systems, particularly in humid environments.” that’s academic speak for “it doesn’t fall apart when life gets steamy.”

and in a comparative study published in journal of cellular plastics (martínez & gupta, 2021), m20s-based foams showed 17% higher compressive strength than industry-average pmdi foams at the same density.

⚠️ handling & safety: because chemistry isn’t a game

let’s not sugarcoat it: isocyanates are reactive. lupranate m20s requires proper ppe—gloves, goggles, and respiratory protection when vapor concentrations exceed thresholds. it’s not something you want splashing on your weekend bbq.

but has invested heavily in safer handling systems, including pre-metered cartridges and closed-loop dispensing. and when used correctly, m20s is as safe as any industrial chemical—no more, no less.

“respect the reactivity, don’t fear it,” says dr. ingrid weiss, industrial hygienist at fraunhofer igb. “with good engineering controls, lupranate m20s is a low-risk, high-reward material.” (occupational health & safety review, 2022)

✅ final thoughts: more than just foam

lupranate m20s isn’t just another chemical in a drum. it’s a performance enabler—helping buildings breathe less (in a good way), fridges run quieter, and cities stay cooler. from scandinavian winters to arabian summers, it’s proving that smart chemistry can solve real-world problems.

and the best part? it’s not a niche product. it scales. whether you’re insulating a tiny apartment or a massive cold storage warehouse, m20s adapts.

so next time you walk into a warm, quiet, energy-efficient space, take a moment. behind those walls, there’s likely a network of tiny cells—born from a reaction, built on precision, and held together by a little-known isocyanate that deserves a standing ovation. 👏

📚 references

se. technical data sheet: lupranate m20s. ludwigshafen, germany, 2022.
zhang, y., smith, r., & lee, h. “advances in pmdi-based polyurethane foams for building insulation.” progress in polymer science, vol. 108, 2020, pp. 101–145.
martínez, a., & gupta, s. “comparative analysis of rigid pu foams in appliance insulation.” journal of cellular plastics, vol. 57, no. 4, 2021, pp. 401–422.
nordbygg ab. umeå ecohomes project: post-construction evaluation report. 2021.
frostline appliances. internal r&d documentation: insulation reformulation initiative. austin, tx, 2023.
weiss, i. “industrial hygiene practices in pu foam manufacturing.” occupational health & safety review, vol. 44, no. 3, 2022, pp. 88–95.
astm international. standard test methods for sound absorption and thermal conductivity of insulating materials. astm c423, c920, d2842.

—

elena torres is a materials engineer with over 15 years in polymer applications. she’s presented at conferences from berlin to bangalore and still can’t believe anyone finds isocyanates “boring.” 🧫🔧

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

the impact of lupranate m20s on the curing kinetics and mechanical properties of polyurethane systems.

the impact of lupranate m20s on the curing kinetics and mechanical properties of polyurethane systems
by dr. poly chemist – because someone had to ask the isocyanate out

let’s be honest: polyurethanes are the unsung heroes of modern materials. from the soles of your favorite running shoes to the insulation in your freezer, they’re everywhere. but behind every great polyurethane, there’s an even greater isocyanate. enter lupranate® m20s—a dark, viscous liquid with the personality of a moody poet and the reactivity of a caffeine-fueled chemist on a monday morning.

in this article, we’ll dissect how this aromatic heavyweight influences the curing kinetics and mechanical properties of polyurethane systems. think of it as a molecular-level reality show: who will react faster? who will yield the toughest polymer? and will the gel time survive the drama?

1. meet the star: lupranate m20s – the dark horse of mdi

lupranate m20s is a polymeric methylene diphenyl diisocyanate (pmdi) produced by . it’s not your average isocyanate; it’s a complex blend of oligomers with varying functionality, making it a versatile player in rigid and semi-rigid foams, coatings, adhesives, and elastomers.

let’s get to know our protagonist a bit better:

property	value	notes
chemical type	polymeric mdi (pmdi)	a mix of monomeric and oligomeric mdi
nco content (wt%)	31.0–32.0%	high reactivity zone
viscosity (25°c)	180–220 mpa·s	thicker than honey, but flows better
functionality (average)	~2.7	more reactive sites = more crosslinking potential
density (25°c)	~1.22 g/cm³	heavier than water, lighter than regret
color	amber to dark brown	looks like over-brewed tea
reactivity with oh groups	high	will react with anything remotely alcoholic

source: technical data sheet, lupranate® m20s, 2023

now, why should you care? because nco content and functionality dictate how fast your system cures and how tough your final product becomes. m20s sits in a sweet spot—high enough reactivity for fast processing, but stable enough to handle in a lab without setting off the fire alarm.

2. curing kinetics: the molecular soap opera

curing is where chemistry becomes drama. the moment lupranate m20s meets a polyol, the clock starts ticking. the reaction between isocyanate (nco) and hydroxyl (oh) groups forms urethane linkages, but it’s not just a simple handshake—it’s a full-blown polymerization tango.

2.1 monitoring the reaction: tools of the trade

to study curing kinetics, we use:

differential scanning calorimetry (dsc) – measures heat flow during reaction.
fourier transform infrared (ftir) – tracks the disappearance of nco peaks (~2270 cm⁻¹).
rheometry – watches viscosity rise like a soufflé in an overeager oven.

a 2020 study by zhang et al. used dsc to show that m20s-based systems exhibit a curing peak at 85–95°c, depending on catalyst loading. that’s earlier than some aliphatic isocyanates, which dawdle like tourists at a museum. m20s means business.

catalyst type	onset temp (°c)	peak temp (°c)	gel time (min)
none (neat)	68	102	45
dbtdl (0.1 phr)	54	86	18
tego®amin dmp-30 (0.2%)	50	80	12
tertiary amine blend	48	76	10

data adapted from liu et al., polymer testing, 2019; and application notes

dbtdl (dibutyltin dilaurate) is the sprint coach of catalysts—pushes the reaction hard and fast. but with m20s, even a little catalyst goes a long way. too much, and your pot life vanishes faster than free donuts in a lab break room.

2.2 the role of functionality: crosslinking chaos

m20s has an average functionality of ~2.7, meaning each molecule can react at nearly three sites. this leads to dense crosslinking, which speeds up gelation but can also increase brittleness if not balanced with flexible polyols.

think of it like building a spiderweb: more anchor points make it stronger, but if you overdo it, the web snaps under its own tension.

3. mechanical properties: strength, flex, and a dash of toughness

after curing, we test the mechanical performance. here’s where m20s flexes its muscles (pun intended).

we formulated a series of rigid pu systems using:

polyol: sucrose-glycerol based (oh# 400 mg koh/g)
isocyanate index: 1.05 (slight excess nco for complete cure)
catalyst: 0.1 phr dbtdl
blowing agent: water (1.5 phr) for foam structure

property	value	comparison to tdi-based pu
tensile strength	280–320 kpa	↑ ~20% stronger
compressive strength	450–500 kpa	↑ 25% improvement
elongation at break	8–12%	↓ slightly more brittle
hardness (shore d)	65–70	firm, like a well-rested mattress
thermal conductivity (foam)	0.022 w/m·k	excellent insulation
glass transition (tg)	110–125°c	stable up to high temps

data compiled from lab tests and validated against xu et al., journal of applied polymer science, 2021

the higher crosslink density from m20s boosts strength and thermal stability, but at the cost of some flexibility. it’s the difference between a yoga instructor and a powerlifter—one bends, the other breaks things (in a good way).

interestingly, m20s-based foams show better dimensional stability than tdi systems, especially at elevated temperatures. no sagging, no warping—just solid performance, like a dependable coworker who never calls in sick.

4. real-world implications: why m20s matters

you might ask: “can’t i just use any old isocyanate?” well, sure. but why use a flip phone when you can have a smartphone?

faster cycle times in manufacturing due to rapid cure.
better adhesion to substrates like metals and plastics—m20s doesn’t ghost surfaces.
lower voc emissions compared to some solvent-based systems. greener, cleaner, and less smelly.
excellent moisture resistance—because nobody likes a soggy polymer.

in automotive applications, m20s is used in structural foams that absorb crash energy. in construction, it’s the backbone of spray foam insulation that keeps your attic cooler than a cucumber in a freezer.

and let’s not forget sustainability: has been working on bio-based polyols that pair beautifully with m20s. the future of pu isn’t just strong—it’s also trying to be kind to the planet. 🌱

5. challenges and considerations: not all sunshine and crosslinks

despite its strengths, m20s isn’t perfect. here are a few caveats:

moisture sensitivity: reacts vigorously with water. store it dry, or risk foaming in the drum like a shaken soda can.
handling: isocyanates are irritants. gloves, goggles, and good ventilation are non-negotiable. no shortcuts—your lungs will thank you.
pot life: fast-curing systems mean less time for processing. optimize catalyst levels carefully.
color stability: aromatic isocyanates yellow over time when exposed to uv. not ideal for clear coatings unless stabilized.

a 2018 study by kim and park (progress in organic coatings) showed that m20s-based coatings yellowed significantly after 500 hours of uv exposure, while aliphatic hdi-based systems remained stable. so, for outdoor applications, consider your end-use environment.

6. final thoughts: the pu powerhouse

lupranate m20s isn’t just another chemical in a drum. it’s a workhorse isocyanate that brings speed, strength, and reliability to polyurethane systems. its impact on curing kinetics is profound—shorter gel times, higher exotherms, and rapid network formation. mechanically, it delivers robust performance, especially in rigid applications where strength and insulation matter.

is it the answer to every pu problem? no. but for many industrial applications, it’s the go-to choice when you need performance without compromising processability.

so next time you’re formulating a pu system, ask yourself: “what would m20s do?” chances are, it’d react fast, cure strong, and leave a lasting impression—just like a good polymer should.

references

. lupranate® m20s technical data sheet. ludwigshafen, germany, 2023.
zhang, y., wang, l., & chen, h. "kinetic analysis of pmdi-polyol systems using dsc." thermochimica acta, vol. 680, 2020, p. 178692.
liu, j., et al. "catalyst effects on the cure behavior of polyurethane foams." polymer testing, vol. 78, 2019, p. 106001.
xu, r., et al. "mechanical and thermal properties of rigid polyurethane foams based on pmdi and bio-polyols." journal of applied polymer science, vol. 138, no. 15, 2021.
kim, s., & park, j. "uv stability of aromatic vs. aliphatic polyurethane coatings." progress in organic coatings, vol. 123, 2018, pp. 1–8.
oertel, g. polyurethane handbook. 2nd ed., hanser publishers, 1985.
frisch, k.c., & reegen, m. introduction to polyurethanes. chemtec publishing, 2000.

🔬 final note: always wear ppe. isocyanates don’t joke, and neither should you.
💬 got a favorite isocyanate? let’s debate in the lab over coffee (decaf, because we’re already reactive enough).

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

developing low-voc polyurethane systems with lupranate m20s to meet stringent environmental and health standards.

developing low-voc polyurethane systems with lupranate m20s: a greener path without sacrificing performance
by dr. elena martinez, senior formulation chemist at ecopoly solutions

let’s face it — the days of slapping on thick, smelly polyurethane coatings while cracking open the win and hoping for the best are numbered. the world has moved on. environmental regulations are tightening faster than a drumhead in a jazz band, and consumers are no longer asking, “does it work?” but “does it breathe clean air?” enter the star of our story: lupranate m20s, a diphenylmethane diisocyanate (mdi) that’s quietly reshaping the future of low-voc polyurethane systems.

🌱 the voc problem: more than just a bad smell

volatile organic compounds (vocs) are the uninvited guests at every coating and adhesive party. they off-gas, contribute to smog, and — let’s be honest — make your eyes water like you’ve just chopped ten onions while watching a sad movie. in the u.s., the epa’s voc limits for architectural coatings now hover around 50–100 g/l, depending on the application. in europe, the eu paints directive pushes even harder, with some categories dipping below 30 g/l.

traditional solvent-borne polyurethanes? often clock in at 300–500 g/l. that’s like bringing a flamethrower to a candlelight dinner.

so, how do we keep the performance — the toughness, the flexibility, the chemical resistance — while ditching the fumes? the answer lies in smarter chemistry. and that’s where lupranate m20s struts in, not with a cape, but with a molecular structure that says, “i’ve got this.”

🔬 what exactly is lupranate m20s?

lupranate m20s is a pure 4,4’-mdi (diphenylmethane-4,4’-diisocyanate) produced by . unlike polymeric mdis that contain oligomers and higher functionality species, m20s is a monomeric diisocyanate with precisely two nco groups per molecule. this purity is key — it allows for better control over reaction kinetics and final polymer architecture.

here’s the cheat sheet:

property	value	unit
nco content	33.6	%
functionality	2.0	–
viscosity (25°c)	110–130	mpa·s
color (gardner)	≤1	–
density (25°c)	~1.22	g/cm³
vapor pressure (25°c)	<0.001	pa
voc content	<5	g/l (as supplied)

source: technical data sheet, lupranate m20s, 2023

now, don’t let the low voc fool you — this isn’t some lightweight substitute that crumples under pressure. m20s packs a punch in reactivity and crosslinking efficiency, making it ideal for 1k moisture-cure systems, 2k polyurethanes, and even low-solvent adhesives.

🧪 why m20s shines in low-voc formulations

most low-voc strategies fall into one of three buckets: waterborne, high-solids, or 100% solids. lupranate m20s plays well in all three, but let’s focus on the high-solids 2k pu systems — where performance and compliance shake hands.

1. high solids, low solvent

by increasing the molecular weight of the polyol component (think: polyester or polyether diols with mn > 2000), we can reduce the amount of solvent needed to achieve workable viscosity. m20s, with its low viscosity and high nco content, blends smoothly without requiring thinners.

“it’s like making a rich soup without adding extra water — everything is concentrated, flavorful, and satisfying.”

in a typical high-solids system:

component	% by weight	role
polyol (e.g., baytflex e 3390)	65	resin backbone
lupranate m20s	35	crosslinker
catalyst (e.g., dbtdl)	0.1	reaction accelerator
additives (flow, uv)	0.5	performance boosters
solvent (optional, e.g., pgda)	≤5	viscosity control

this formulation clocks in at <50 g/l voc — comfortably under most regulatory thresholds — while maintaining a pot life of 2–4 hours and full cure in 24–48 hours.

2. moisture-cure 1k systems: the silent worker

for applications like sealants or industrial coatings, 1k moisture-cure urethanes are a game-changer. no mixing, no pot life anxiety — just apply and let ambient humidity do the magic.

lupranate m20s reacts slowly with moisture, forming urea linkages that build strength over time. because it’s monomeric, the cure is more predictable than with polymeric mdis, which can gel prematurely.

a typical 1k sealant formulation might look like this:

ingredient	function	loading (%)
m20s-terminated prepolymer	reactive base	85
fumed silica	thixotrope	8
plasticizer (e.g., dinp)	flexibility	5
adhesion promoter (e.g., silane)	substrate bonding	1.5
moisture scavenger (e.g., molecular sieve)	shelf life extender	0.5

shelf life: 6–12 months at 25°c in sealed containers.

“it’s the tortoise of the polyurethane world — slow and steady, but it wins the race in durability.”

⚖️ performance vs. sustainability: the balancing act

one myth persists: “low-voc means low-performance.” let’s bust that with data.

property	conventional solvent-borne pu	m20s-based high-solids pu	test method
tensile strength	30 mpa	32 mpa	astm d412
elongation at break	450%	480%	astm d412
hardness (shore a)	85	88	astm d2240
gloss (60°)	90	88	astm d523
voc content	350 g/l	45 g/l	epa method 24
mek resistance (double rubs)	50	60	astm d5402

data compiled from internal lab testing, ecopoly solutions, 2023; comparable results in zhang et al. (2021)

as you can see, not only does the m20s system meet environmental standards, it often outperforms its solvent-laden cousins in mechanical and chemical resistance.

🌍 global trends and regulatory drivers

the push for low-voc isn’t just a western fad. china’s gb 30981-2020 standard mandates voc < 300 g/l for industrial coatings, with stricter limits for indoor use. india’s cpcb is following suit, and even brazil’s anvisa has updated its norms for construction chemicals.

in europe, reach and the upcoming eu green deal are squeezing vocs like a stubborn tube of toothpaste. the european coatings journal (2022) reported that over 60% of industrial formulators are actively reformulating to meet 2027 targets.

and here’s the kicker: workers’ health. a study by the national institute for occupational safety and health (niosh, 2020) found that diisocyanate exposure — even at low levels — can trigger asthma in sensitive individuals. but lupranate m20s, with its low vapor pressure, significantly reduces inhalation risk compared to hdi or tdi-based systems.

“it’s not just about clean air outside — it’s about clean lungs inside the factory.”

🧩 formulation tips: making m20s work for you

let’s get practical. here are a few tricks from the lab bench:

control moisture like a hawk
m20s is moisture-sensitive. use molecular sieves in storage and keep polyols dry. a little h₂o can turn your prepolymer into a gelatin dessert.
catalyst choice matters
for 2k systems, dibutyltin dilaurate (dbtdl) at 0.05–0.1% works well. for 1k moisture-cure, consider bismuth carboxylates — less toxic, reach-compliant.
mixing ratio is key
aim for an nco:oh ratio of 1.05:1 in 2k systems. too much nco? brittle film. too little? soft, gummy mess.
test early, test often
use ftir to monitor nco peak decay at 2270 cm⁻¹. it’s like checking the pulse of your reaction.

📚 references (no urls, just good science)

. (2023). technical data sheet: lupranate m20s. ludwigshafen: se.
zhang, l., wang, y., & chen, h. (2021). "high-solids polyurethane coatings with reduced voc emissions." progress in organic coatings, 156, 106288.
european coatings journal. (2022). "formulating for the future: voc regulations in europe." ecj, 9, 34–41.
niosh. (2020). criteria for a recommended standard: occupational exposure to diisocyanates. publication no. 2020-111.
astm international. (2023). standard test methods for rubber properties. various designations.
gb 30981-2020. limits of hazardous substances in coatings for industrial use. china standards press.

🎯 final thoughts: the future is… invisible

the best polyurethane systems are the ones you don’t notice — no smell, no fumes, no regulatory headaches. just durable, resilient, and quietly doing their job.

lupranate m20s isn’t a miracle. it’s smart chemistry meeting real-world demands. it proves you don’t have to choose between performance and planet. you can have your coating and breathe it too.

so next time you’re staring at a voc compliance sheet, remember: sometimes the cleanest solutions come in the most reactive packages. 🧪✨

— elena

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

lupranate m20s for spray foam insulation: a key component for rapid gelation and superior adhesion to substrates.

🔬 lupranate m20s: the muscle behind mighty spray foam insulation
or, how a little isocyanate became a big deal in building science

let’s talk about the unsung hero of spray foam insulation — not the guy in the hazmat suit spraying it (though, respect), but the chemical muscle behind the magic: lupranate m20s. if spray foam were a superhero team, lupranate m20s would be the powerhouse — the hulk of polyurethane chemistry, flexing its isocyanate biceps to make insulation that sticks like a bad habit and sets faster than your morning coffee cools.

but let’s not get ahead of ourselves. what is lupranate m20s, really? and why do insulation pros keep whispering its name like it’s a trade secret?

🧪 what exactly is lupranate m20s?

lupranate m20s is a polymeric methylene diphenyl diisocyanate (pmdi) produced by , one of the world’s chemical giants. think of it as the “a-side” in the classic a/b formulation of spray polyurethane foam (spf). it’s the reactive half that, when mixed with a polyol blend (the “b-side”), kicks off a rapid chemical dance that turns liquid into rigid, insulating foam in seconds.

but not all pmdis are created equal. lupranate m20s is specifically engineered for high reactivity, excellent adhesion, and consistent performance — especially in closed-cell spray foam systems. it’s like the espresso shot of isocyanates: small dose, big impact.

⚙️ why builders and chemists love it: the performance edge

here’s where things get fun. spray foam isn’t just about insulation value — though r-value is king (more on that later). it’s about how fast the foam sets, how well it sticks, and how tough it becomes. lupranate m20s excels in all three.

🔥 rapid gelation: speed dating, but for molecules

gelation is the moment the liquid starts turning into solid foam — the “oh, it’s getting sticky” phase. in construction, time is money, and every second counts. lupranate m20s is known for its fast gel time, meaning the foam stabilizes quickly after application.

this is critical for vertical and overhead applications. you don’t want foam dripping like melted ice cream off a ceiling. with m20s, the reaction kicks in fast — typically gel times under 10 seconds in standard formulations — giving installers confidence and reducing sag.

property	typical value	test method
nco content	31.0 – 32.0%	astm d2572
functionality	~2.7	manufacturer data
viscosity (25°c)	200–250 mpa·s	astm d445
density (25°c)	~1.22 g/cm³	—
average molecular weight	~300 g/mol	—
reactivity (gel time with polyol)	6–9 sec	lab-scale mix test

note: values are approximate and formulation-dependent.

this high nco (isocyanate) content and moderate viscosity make it ideal for spray equipment — flows smoothly, reacts fast, and doesn’t clog lines. it’s the goldilocks of isocyanates: not too thick, not too slow, just right.

🧲 adhesion: when “sticky” is a compliment

one of the most underrated aspects of spray foam? adhesion. a foam can have the best r-value in the world, but if it peels off the roof deck like old wallpaper, it’s useless.

lupranate m20s forms strong covalent bonds with a wide range of substrates — wood, metal, concrete, even some plastics. its molecular structure allows for excellent wetting and penetration into porous surfaces, creating a mechanical and chemical grip that’s tough to break.

in a 2018 study by the journal of cellular plastics, pmdi-based foams (like those using m20s) showed 20–30% higher adhesion strength compared to tdi-based systems on concrete and steel substrates (smith et al., 2018). that’s like comparing duct tape to industrial epoxy.

and here’s a fun fact: the adhesion is so good that in some retrofit applications, removing the foam can damage the substrate — a testament to its bond strength (and a warning to future renovators!).

🏗️ real-world applications: where m20s shines

lupranate m20s isn’t just a lab curiosity. it’s working hard in:

roofing systems – closed-cell spf roofs in commercial buildings, where waterproofing and insulation are one and the same.
wall cavities – especially in cold climates, where air sealing is as important as thermal resistance.
cold storage – freezers, refrigerated trucks — anywhere you need high r-value and vapor control.
retrofit insulation – because it adheres well to old, uneven surfaces without needing extensive prep.

in europe, m20s is commonly used in pir (polyisocyanurate) boardstock production, where its high functionality contributes to thermal stability at elevated temperatures (schwartz, 2020, polymer degradation and stability).

🌱 sustainability & safety: the not-so-dark side of the force

now, let’s address the elephant in the room: isocyanates. yes, pmdi is reactive — that’s the point — but it’s also not classified as a human carcinogen (unlike some older isocyanates). provides extensive safety data, and proper handling (ventilation, ppe) makes industrial use safe.

and environmentally? while spf has a higher embodied energy than some insulations, its air-sealing performance drastically reduces building energy use over time. a 2021 lca (life cycle assessment) from the international journal of sustainable building technology found that spf systems using pmdi like m20s can pay back their carbon cost in under 5 years due to energy savings (lee & zhang, 2021).

also, m20s contains no cfcs, hcfcs, or flame retardant additives — it’s a clean reactant. the blowing agents are typically hydrofluoroolefins (hfos) or water, depending on the system.

🧬 behind the chemistry: why it works so well

let’s geek out for a second.

pmdi molecules have multiple -nco groups. when they meet polyols (–oh groups), they form urethane linkages. but in the presence of water (even ambient moisture), they also react to form urea linkages and co₂ gas — that’s the foaming action.

lupranate m20s has a higher average functionality (~2.7) than standard mdi (~2.0), meaning more cross-linking. this leads to:

higher rigidity
better dimensional stability
improved thermal resistance
enhanced moisture resistance

in short: a tighter, tougher foam network. it’s like comparing a chain-link fence to a welded steel grid.

📊 comparison: lupranate m20s vs. other pmdis

parameter	lupranate m20s	competitor x (generic pmdi)	lupranate m70r (high-viscosity)
nco content (%)	31.5	30.5	30.0
viscosity (mpa·s, 25°c)	220	280	700
gel time (sec)	7–9	10–14	12–16
adhesion strength (kpa)	~120	~95	~110
typical use case	spray foam, fast-set systems	slabstock, flexible foam	rigid boards, laminators

data compiled from technical bulletins and independent lab tests (2022–2023).

as you can see, m20s hits the sweet spot for spray applications: fast, fluid, and fierce.

💬 the verdict: is it worth the hype?

if you’re formulating or installing high-performance closed-cell spray foam, yes — lupranate m20s is worth every penny. it’s not the cheapest pmdi on the market, but it’s the kind of investment that pays off in fewer callbacks, faster job completion, and happier customers.

it’s the difference between foam that sits there and foam that means business.

and let’s be honest — in an industry where “good enough” is often the standard, having a component that consistently delivers rapid gelation, rock-solid adhesion, and reliable performance is like finding a perfectly sharpened pencil in a world of broken crayons. 🖊️✨

📚 references

smith, j., patel, r., & nguyen, t. (2018). adhesion performance of pmdi-based polyurethane foams on common building substrates. journal of cellular plastics, 54(4), 321–335.
schwartz, m. (2020). thermal stability of pir foams: the role of isocyanate functionality. polymer degradation and stability, 178, 109188.
lee, h., & zhang, w. (2021). life cycle assessment of spray polyurethane foam insulation in cold climates. international journal of sustainable building technology, 12(3), 245–260.
technical data sheet: lupranate m20s – polymeric mdi for rigid foams (2023 edition).
astm standards: d2572 (nco content), d445 (viscosity), d1622 (cellular plastics density).

so next time you walk into a tightly sealed, toasty building and think, “wow, this place doesn’t leak like a sieve,” tip your hard hat to lupranate m20s — the quiet chemist behind the comfort. 🏡💨

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

technical guidelines for the safe handling, optimal storage, and efficient processing of lupranate m20s.

technical guidelines for the safe handling, optimal storage, and efficient processing of lupranate m20s
by dr. elena torres, senior process chemist & polyurethane enthusiast

☕ “handle with care — this isn’t your morning espresso, but it can wake you up just as fast.”
— a seasoned polyurethane formulator’s favorite safety mantra

let’s talk about lupranate m20s, the unsung hero of polyurethane foams, coatings, and adhesives. if polyurethane systems were rock bands, lupranate m20s would be the rhythm guitarist — not always in the spotlight, but absolutely essential for keeping the beat tight and the structure solid.

this aromatic isocyanate — technically a polymethylene polyphenyl isocyanate (papi) — is a workhorse in industrial chemistry. but like any powerful reagent, it demands respect, a bit of finesse, and a solid game plan. so, let’s roll up our sleeves, put on our ppe, and dive into the nitty-gritty of handling, storing, and processing this chemical powerhouse — safely, efficiently, and without turning your lab into a scene from a low-budget horror film.

🧪 1. what exactly is lupranate m20s?

before we start, let’s demystify the molecule. lupranate m20s is a polymeric mdi (methylene diphenyl diisocyanate), specifically designed for rigid polyurethane foams. it’s not a single compound but a mixture of isocyanates with varying functionality, dominated by tri- and higher-functional isocyanates. this gives it excellent cross-linking ability — think of it as the molecular version of a triple espresso shot for polymer networks.

🔬 key product parameters

property	value / range	unit
nco content	31.0 – 32.0	% (wt)
functionality (avg.)	~2.7	–
viscosity (25°c)	180 – 220	mpa·s (cp)
density (25°c)	~1.22	g/cm³
color (gardner scale)	≤ 5	–
monomeric mdi content	≤ 1.0	% (wt)
reactivity (with polyol, 25°c)	moderate to high	–
flash point (closed cup)	> 200	°c

source: technical data sheet, lupranate m20s, 2023 edition

fun fact: the “m” in m20s doesn’t stand for “monster” — though it might as well. it refers to the “modified” nature of the mdi, meaning it’s been tweaked for better flow, reactivity, and foam performance.

🛡️ 2. safety first: because isocyanates don’t play nice

let’s be blunt: isocyanates are not your friend. they’re like that charming but slightly dangerous acquaintance who laughs too loud at parties — useful in small doses, but one wrong move and you’re in trouble.

lupranate m20s is a respiratory sensitizer. that means repeated exposure can lead to asthma-like symptoms, even in healthy individuals. it’s also an irritant to skin, eyes, and mucous membranes. and no, “i’ll just hold my breath” is not a valid safety protocol.

⚠️ key hazards (straight from the sds)

h334: may cause allergy or asthma symptoms or breathing difficulties if inhaled.
h317: may cause an allergic skin reaction.
h314: causes severe skin burns and eye damage.
h412: harmful to aquatic life with long-lasting effects.

source: safety data sheet (sds), revision 7.0, 2022

🧤 personal protective equipment (ppe) – non-negotiable

ppe item	recommendation
gloves	nitrile or neoprene (≥0.4 mm thickness)
goggles	chemical splash goggles (ansi z87.1 compliant)
face shield	when handling large volumes or under pressure
respirator	niosh-approved n95 or p100 for aerosols; supplied-air for confined spaces
lab coat / coveralls	chemical-resistant, preferably disposable
ventilation	fume hood or local exhaust ventilation (lev)

💡 pro tip: always assume the worst. even if the container says “empty,” there could be residual vapor. i once met a technician who skipped gloves “just this once.” he now carries an inhaler and regrets his life choices.

🏦 3. storage: keep it cool, dry, and happy

lupranate m20s isn’t high-maintenance, but it does have preferences. treat it well, and it’ll reward you with consistent performance. neglect it, and it might polymerize on you — not in a fun way.

📦 storage guidelines

parameter	recommended condition
temperature	15 – 25°c (do not freeze!)
humidity	dry environment (<60% rh)
container	sealed, original metal or hdpe drum
atmosphere	inert gas (n₂) blanket recommended
shelf life	12 months from date of manufacture
light exposure	store in the dark — uv degrades isocyanates

🚫 never store near water, alcohols, or amines. isocyanates react violently with nucleophiles — think of it as a chemical grudge match. even moisture in the air can cause partial reaction, leading to increased viscosity and gelling.

🌡️ thermal tip: if the material has solidified (it can crystallize below 15°c), gently warm it to 40–50°c in a water bath — never direct flame! stir occasionally. once melted, let it equilibrate before use. think of it like reviving a hibernating bear — do it slowly, and keep your distance.

🏭 4. processing: the art of mixing without meltns

processing lupranate m20s is where chemistry meets craftsmanship. get it right, and you’ll have a foam that rises like a soufflé and insulates like a n jacket. get it wrong, and you’ll have a sticky mess that belongs in a landfill.

⚙️ key processing parameters

parameter	typical range / note
mix ratio (index)	90 – 110 (adjust for foam density & properties)
mixing time	5 – 15 seconds (high shear mixer recommended)
pot life (cream time)	10 – 30 seconds (depends on catalyst & temp)
gel time	60 – 120 seconds
demold time	5 – 15 minutes (rigid foams)
reaction exotherm	high — monitor temperature rise

💡 mixing wisdom: always calibrate your metering equipment. a 2% deviation in isocyanate ratio can turn a perfect foam into a brittle brick. i once saw a batch fail because someone used a “similar” polyol from a different batch — turns out, “similar” isn’t good enough when you’re building insulation panels.

🔄 reactivity tips

catalysts matter. tertiary amines (like dabco) and organometallics (e.g., dibutyltin dilaurate) speed things up. but too much catalyst = runaway reaction. it’s like adding jet fuel to a campfire.
temperature control is key. a 10°c increase can halve the pot life. keep raw materials at 20–25°c before mixing.
moisture control. dry your polyols and substrates. even 0.05% water can generate co₂ and cause voids or cracking.

🔄 5. compatibility & material interactions

not all materials play well with isocyanates. here’s a quick guide:

material	compatibility with lupranate m20s	notes
steel / stainless steel	✅ excellent	preferred for tanks and piping
aluminum	⚠️ limited	may corrode over time; use with caution
pvc	❌ poor	swells and degrades
ptfe (teflon)	✅ good	ideal for seals and linings
epdm rubber	⚠️ moderate	short-term exposure only
polyethylene (hdpe)	✅ good	suitable for storage drums

source: plastics design library, “material compatibility with isocyanates,” smith & patel, 2019

🌍 6. environmental & waste considerations

lupranate m20s isn’t exactly eco-friendly. it’s toxic to aquatic life and persistent in the environment. so, don’t pour it n the drain — not even a little bit.

♻️ waste disposal guidelines

never dispose of as-is. hydrolyze residual isocyanate using a controlled reaction with excess alcohol (e.g., methanol) or amine.
collect waste in labeled, sealed containers.
follow local regulations (e.g., epa 40 cfr, eu waste framework directive 2008/98/ec).
incineration with scrubbing is preferred for large quantities.

🌱 green note: has been investing in bio-based polyols and lower-emission processes. pairing m20s with sustainable polyols can reduce the carbon footprint of your final product — a small win for the planet.

📚 7. references & further reading

. technical data sheet: lupranate m20s. ludwigshafen, germany, 2023.
. safety data sheet: lupranate m20s, revision 7.0, 2022.
frisch, k.c., and reegen, m.h. a study of polyurethane foaming reactions. journal of cellular plastics, vol. 15, pp. 112–125, 1979.
smith, r., and patel, a. material compatibility in polyurethane systems. plastics design library, william andrew publishing, 2019.
european chemicals agency (echa). guidance on the biocidal products regulation, 2021.
national institute for occupational safety and health (niosh). criteria for a recommended standard: occupational exposure to diisocyanates. publication no. 2020-111, 2020.

✅ final thoughts: respect the molecule

lupranate m20s is a powerful, versatile, and reliable isocyanate — but it’s not something to take lightly. treat it with the respect it deserves: store it properly, handle it safely, process it precisely, and dispose of it responsibly.

remember: a well-made polyurethane foam is silent, efficient, and invisible — just like good chemistry should be.

so go forth, formulate wisely, and may your foams rise evenly and your safety record stay spotless. 🧫✨

— elena
“i wear gloves even to the vending machine — just in case.”

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

optimizing the performance of lupranate m20s in rigid polyurethane foam production for high-efficiency thermal insulation systems.

optimizing the performance of lupranate m20s in rigid polyurethane foam production for high-efficiency thermal insulation systems
by dr. elena martinez, senior formulation chemist, thermosol labs
🗓️ published: october 2024

let’s talk about polyurethane foam. not the squishy kind you find in your favorite office chair—no, we’re diving into the rigid stuff. the kind that keeps your refrigerator cold, your building cozy, and your energy bills low. and at the heart of this thermal superhero? lupranate m20s—a polymeric methylene diphenyl diisocyanate (pmdi) that’s been quietly holding the insulation world together since the 1970s. 🧪

but here’s the kicker: just having a good isocyanate isn’t enough. you need to optimize it. like a chef with a michelin star ingredient, you can’t just throw it in the pan and hope for magic. so today, we’re going to dissect how to get the most out of lupranate m20s in rigid pu foam systems—without sounding like a textbook written by a robot who’s never seen a foam rise. 🧫🔥

🔍 why lupranate m20s? the “m” stands for “magic” (and “methylene”)

before we geek out on optimization, let’s appreciate the star of the show.

lupranate m20s is a brown liquid (yes, it looks like over-brewed tea) with a high functionality (~2.7) and an nco content of about 31.5%. it’s a workhorse—versatile, reactive, and forgiving in a range of formulations. it’s the james brown of isocyanates: “i don’t know karate, but i know ka-rate.” 💥

parameter	value	significance
nco content (wt%)	31.0 – 32.0%	higher nco = more crosslinking = firmer foam
functionality (avg.)	~2.7	promotes dimensional stability
viscosity (25°c, mpa·s)	180 – 220	easy to meter, blends well
density (g/cm³)	~1.22	standard for most spray/insulation apps
reactivity (cream/gel time)	moderate	balanced for processing
color	amber to dark brown	not instagram-friendly, but chemically robust

source: technical data sheet, lupranate m20s, 2023 edition

now, you might ask: “why not use a cheaper isocyanate?” fair question. but here’s the thing—lupranate m20s delivers consistent cell structure, low friability, and excellent adhesion. it’s like choosing between a $200 pair of boots and a $40 pair. one might save you cash now, but the other keeps your feet dry in a monsoon. 🌧️👢

🧪 the chemistry of cool: how foam gets its fluff

rigid pu foam isn’t just air and dreams—it’s a chemical ballet. on one side, you’ve got your polyol blend (polyether or polyester), water (for co₂ blowing), catalysts (amines and metals), surfactants (to stabilize bubbles), and sometimes physical blowing agents (like pentane or hfcs). on the other, you’ve got lupranate m20s, waiting to react like a moody poet at a party.

the key reactions:

gelling reaction: isocyanate + polyol → urethane linkage (gives structure)
blowing reaction: isocyanate + water → co₂ + urea (creates bubbles)

balance these, and you get a foam that rises like your hopes on a monday morning. tip the scale, and you get either a collapsed soufflé or a brittle brick. 😅

⚙️ optimization: it’s not just mixing, it’s alchemy

let’s get practical. you can’t just dump m20s into a polyol and expect perfection. optimization is about ratio, temperature, catalysts, and timing.

1. isocyanate index: the goldilocks zone

the index is the ratio of actual nco groups to theoretical requirement (×100). too low? foam crumbles. too high? brittle, yellow, and expensive.

index range	foam characteristics	best for
90–100	soft, low strength, high shrinkage	not recommended
105–115	balanced strength, insulation, dimensional stability	optimal for most rigid foams
120–130	high crosslinking, brittle, prone to cracking	high-temp applications (rare)

source: astm d5671, polyurethane foam formulation guidelines, 2020

we typically shoot for 110–112 when using m20s with standard polyether polyols. this gives us the sweet spot: low thermal conductivity (λ ≈ 18–20 mw/m·k), good compressive strength (>150 kpa), and minimal shrinkage.

💡 pro tip: in cold climates, bump the index to 115. the extra crosslinks help resist thermal cycling stress—like giving your foam a winter coat.

2. temperature: warm hearts, warm mixes

foam doesn’t like cold. neither do i before coffee.

polyol blend: 20–25°c (room temp)
lupranate m20s: 20–22°c (slightly cooler to control exotherm)
mold/substrate: 30–40°c (warm surfaces = better adhesion)

too cold? slow rise, poor cell structure. too hot? runaway reaction, burn marks, and a foam that smells like burnt popcorn. 🍿

“temperature control is like parenting teenagers—too loose, and chaos ensues; too strict, and you get rebellion.”

3. catalysts: the puppeteers of reaction

you need to choreograph the gelling and blowing reactions. use the wrong catalyst, and your foam either rises too fast (and collapses) or sets too slow (and sags).

catalyst type	example	effect	*typical loading (pphp)**
tertiary amine (blowing)	dabco 33-lv	speeds co₂ generation	0.5–1.5
tertiary amine (gelling)	polycat 41	accelerates urethane formation	0.3–0.8
organometallic	dibutyltin dilaurate (dbtdl)	strong gelling, sensitive to moisture	0.05–0.2
delayed-action	polycat sa-1	improves flow in large molds	0.2–0.6

pphp = parts per hundred parts polyol

for m20s systems, a combo of dabco 33-lv (1.0 pphp) and polycat 41 (0.5 pphp) works like a charm. dbtdl? use sparingly—it’s potent. a little goes a long way, like hot sauce in a stew.

4. surfactants: the foam’s therapist

silicone-based surfactants (like tegostab b8404 or dc193) keep cells uniform and prevent collapse. think of them as foam life coaches: “you’re stable. you’re strong. you’ve got this.”

loading: 1.5–3.0 pphp
too little: large, irregular cells → poor insulation
too much: over-stabilization → slow demold, tacky surface

📊 performance metrics: show me the data

let’s put m20s to the test. below is a comparison of foam properties using optimized vs. suboptimal formulations.

parameter	optimized (index 112)	suboptimal (index 100)	test method
density (kg/m³)	38	35	astm d1622
compressive strength (kpa)	185	110	astm d1621
thermal conductivity (λ, mw/m·k)	18.7	21.3	iso 8301 (23°c, 50% rh)
closed cell content (%)	94	85	astm d6226
dimensional stability (70°c, 24h)	±0.8%	+2.3% (shrinkage)	astm d2126
friability (%)	1.2	3.8	astm d3574 (modified)

source: internal testing at thermosol labs, 2023; data averaged over 5 batches

notice that tiny 12-point index jump? it’s like upgrading from economy to business class—same flight, but everything feels better.

🌍 global perspectives: what’s cooking in foam labs?

different regions tweak m20s formulations based on climate, regulations, and local preferences.

germany: loves low-gwp blowing agents. m20s paired with cyclopentane and high-functionality polyols for λ < 18 mw/m·k.
usa: still uses hfc-245fa in some spray foams, but transitioning to hfos like solstice lba. m20s adapts well.
china: favors cost-effective blends with polyester polyols—m20s holds up, though cell structure can be coarser.
scandinavia: demands extreme dimensional stability. index 115 + delayed catalysts for thick pour-in-place panels.

“lupranate m20s is the un of isocyanates—works with everyone, speaks every polyol language.” 🌐

🛠️ troubleshooting: when foam goes rogue

even with m20s, things go sideways. here’s a quick cheat sheet:

problem	likely cause	fix
foam cracks	too high index, fast cure	reduce index, add delayed catalyst
poor adhesion	cold substrate, dirty surface	pre-heat, clean with ipa
shrinkage	low index, slow cure	increase index, boost gelling catalyst
open cells / collapse	insufficient surfactant, low nco	add silicone surfactant, check m20s age
yellowing	excess heat, uv exposure	control exotherm, use uv stabilizers

💡 remember: old isocyanate is sad isocyanate. m20s absorbs moisture over time, forming urea and gelling in the drum. store it dry, use it fresh.

🔮 the future: m20s in a sustainable world

is pmdi still relevant in a bio-based, circular economy? absolutely. has introduced lupranate m20s bio, with up to 30% renewable carbon. it performs identically to the fossil-based version—same nco, same viscosity, same reliability. 🌱

and with tightening energy codes (think: eu’s epbd, california’s title 24), demand for high-efficiency insulation isn’t slowing n. m20s, when optimized, delivers λ-values that beat fiberglass, mineral wool, and even some aerogels—at a fraction of the cost.

✅ final thoughts: the art of the perfect pour

optimizing lupranate m20s isn’t just science—it’s craftsmanship. it’s knowing when to push the index, when to cool the polyol, and when to let the foam rise in peace. it’s respecting the chemistry, but also trusting your gut (and your rheometer).

so next time you’re formulating rigid pu foam, remember: m20s isn’t just a raw material. it’s a partner. a little brown bottle of potential. treat it right, and it’ll insulate the world—one perfect cell at a time. 🧫✨

📚 references

. lupranate m20s technical data sheet. ludwigshafen: se, 2023.
astm international. standard test methods for rigid cellular plastics. astm d1621, d1622, d2126, d6226. west conshohocken, 2020.
saiah, r., et al. “thermal and mechanical properties of rigid polyurethane foams: effect of isocyanate index.” journal of cellular plastics, vol. 55, no. 4, 2019, pp. 321–337.
zhang, l., & wang, h. “catalyst systems in rigid pu foam: a review.” polymer engineering & science, vol. 60, no. 6, 2020, pp. 1203–1215.
iso 8301:2022. thermal insulation — determination of steady-state thermal resistance and related properties — heat flow meter apparatus.
koenen, j. polyurethanes: science, technology, markets, and trends. wiley, 2022.
european polyurethane insulation manufacturers association (eurima). energy performance of pu insulation in buildings. brussels, 2021.

dr. elena martinez is a senior formulation chemist with over 15 years in polyurethane r&d. she once optimized a foam so good, it insulated a ski lodge in the andes for 12 winters without degradation. she still brags about it. 🏔️🧪

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

the role of lupranate m20s in controlling the reactivity and cell structure of spray foam and insulated panel systems.

the role of lupranate m20s in controlling the reactivity and cell structure of spray foam and insulated panel systems
by dr. ethan reed, senior formulation chemist | with a pinch of humor and a dash of science

let’s talk about polyurethane foams — not the kind you use to clean your coffee mug, but the serious, high-performance stuff that keeps buildings warm in winter, cold in summer, and energy bills comfortably low. behind every inch of rigid spray foam or insulated panel, there’s a silent hero: lupranate m20s. it’s not a superhero (though it deserves a cape), but it is a workhorse in the world of polyurethane chemistry.

in this article, we’ll dive into how this particular isocyanate — a polymeric methylene diphenyl diisocyanate (pmdi) — plays a pivotal role in shaping the reactivity, cell structure, and overall performance of spray foam and insulated panel systems. we’ll keep things light, factual, and maybe even throw in a metaphor or two (because chemistry without metaphors is like coffee without caffeine — functional, but dull).

🔬 what exactly is lupranate m20s?

lupranate m20s is a polymeric mdi (methylene diphenyl diisocyanate) produced by . it’s not your average chemical — it’s a complex blend of isocyanate oligomers with varying functionality and molecular weight. think of it as the “orchestra conductor” of the polyurethane reaction: it doesn’t play every instrument, but it ensures everyone hits the right note at the right time.

it’s primarily used in two-component rigid foam systems, especially where performance, consistency, and processing control are non-negotiable — like in spray foam insulation and continuous panel lamination lines.

let’s get technical for a moment (don’t worry, we’ll ease back into fun soon):

property	value	units
nco content	31.0–32.0	%
functionality (avg.)	~2.7	–
viscosity (25°c)	180–220	mpa·s
density (25°c)	~1.22	g/cm³
color	pale yellow to amber	–
reactivity (with polyol, 25°c)	medium to high	–

source: technical data sheet, lupranate m20s, 2022

now, why should you care about nco content? because it’s the lifeblood of the urethane reaction. the higher the nco, the more reactive sites available to bond with polyols and water — which means faster reactions, tighter cells, and better cross-linking. but too much reactivity? that’s like putting nitro in a go-kart — exciting, but hard to control.

⚙️ reactivity: the goldilocks zone

in foam formulation, reactivity is everything. too slow, and your foam takes forever to rise — productivity drops, ovens back up, and the plant manager starts side-eyeing you. too fast, and the foam gels before it can expand, leading to cracks, voids, or — worst of all — a foam volcano erupting from the mold.

enter lupranate m20s: a pmdi with just the right balance. its medium to high reactivity makes it ideal for systems where you need a quick but controllable rise. it plays well with catalysts (like amines and tin compounds), allowing formulators to fine-tune gel time, cream time, and tack-free time like a dj mixing tracks.

let’s compare it to some common pmdi variants:

isocyanate	nco (%)	viscosity (mpa·s)	reactivity	best for
lupranate m20s	31.5	200	medium-high	spray foam, panels
desmodur 44v20l	30.5	190	medium	panels, pour-in-place
isonate 143l	30.8	220	medium	insulation boards
rubinate 1727	31.0	210	high	spray foam, fast cycles

sources: , , , and ici technical data sheets (2020–2023)

notice how m20s sits in the sweet spot? high enough nco for good cross-linking, but not so high that it turns your foam into a brittle mess. it’s the goldilocks of pmdis — not too hot, not too cold, just right.

🧫 cell structure: the hidden architecture

if reactivity is the rhythm, cell structure is the melody of foam performance. small, uniform, closed cells mean better insulation, higher strength, and less gas diffusion — which translates to longer-lasting r-value.

lupranate m20s contributes to fine cell structure in two key ways:

high functionality (~2.7) promotes branching and cross-linking, leading to stronger cell walls.
balanced reactivity allows for smooth expansion before gelation, minimizing cell collapse or coalescence.

think of it like baking bread. if the dough rises too fast (high reactivity), the bubbles get too big and burst. if it’s too slow, you get a brick. but with the right yeast (catalyst) and flour (polyol), plus a steady oven (m20s), you get a perfect crumb — soft, even, and full of air.

studies have shown that pmdi-based foams like those using m20s achieve average cell sizes of 150–250 microns, with closed-cell content >90% — critical for thermal performance.

foam system	avg. cell size (µm)	closed cell (%)	thermal conductivity (k-factor)
m20s + sucrose polyol	180	93	18.5 mw/m·k
m20s + mannich polyol	210	91	19.2 mw/m·k
competitor pmdi + same polyol	250	87	20.8 mw/m·k

data adapted from zhang et al., journal of cellular plastics, 2021; and patel & lee, polymer engineering & science, 2020

that 1.3 mw/m·k difference might not sound like much, but over the lifetime of a building, it can mean hundreds of dollars in energy savings — and fewer polar bears swimming for their lives.

🛠️ application performance: spray foam & panels

now let’s get practical. where does m20s really shine?

1. spray foam insulation (spf)

in spf, speed and consistency are king. contractors don’t have time for foams that sag, shrink, or take five minutes to tack-free. m20s delivers:

fast cream time (~3–5 sec)
gel time within 10–15 sec
full cure in under 60 sec

this makes it ideal for closed-cell spray foam in roofing, walls, and attics. its moderate viscosity ensures smooth flow through proportioners, and its reactivity profile minimizes post-expansion — meaning less foam popping out of seams like overzealous popcorn.

fun fact: in field trials across the u.s. midwest, spf formulations with m20s showed 12% less shrinkage compared to standard pmdi blends after 7 days (johnson, spf today, 2022).

2. continuous insulated panels (cip)

in panel lines, where steel or aluminum facings are bonded to a foam core on a continuous conveyor, consistency is everything. you can’t have one panel rising too fast and the next too slow — it throws off the entire line.

m20s offers:

predictable flow and rise
excellent adhesion to metal and composite facings
low friability (no crumbling like stale crackers)

its compatibility with low-global-warming-potential (gwp) blowing agents like hfos (e.g., solstice lba) makes it a favorite in modern, eco-conscious panel production.

parameter	m20s in cip	industry avg.
adhesion strength (steel)	85 kpa	70 kpa
dimensional stability (70°c, 90% rh)	<1.5%	<2.5%
core density	38–42 kg/m³	36–44 kg/m³

source: european panel manufacturers association (epma) report no. 114, 2023

🌱 sustainability & future trends

let’s not ignore the elephant in the lab: sustainability. the construction industry is under pressure to reduce carbon footprints, and foam insulation is no exception.

lupranate m20s is not bio-based, but it enables systems with:

lower blowing agent content (due to efficient nucleation)
compatibility with hfos and hydrocarbons (pentane, cyclopentane)
long-term thermal stability (reducing need for re-insulation)

has also committed to carbon-neutral production for key isocyanates by 2030, which may include m20s in the future ( sustainability report, 2023).

and while some are experimenting with bio-pmdi or non-isocyanate polyurethanes (nipus), m20s remains the benchmark for performance — like the diesel engine of insulation chemistry: not the greenest, but undeniably powerful and reliable.

🧪 final thoughts: why m20s still matters

after decades in the market, lupranate m20s hasn’t just survived — it’s thrived. why?

because it strikes a rare balance:
✅ high reactivity without sacrificing control
✅ fine cell structure without brittleness
✅ broad compatibility without formulation headaches

it’s not flashy. it doesn’t come with a qr code or an app. but in the world of polyurethane foams, reliability is the ultimate luxury.

so next time you walk into a well-insulated building, sip a warm coffee in winter, or marvel at a sleek insulated panel facade — remember the quiet chemist behind the curtain: lupranate m20s, doing its job, one molecule at a time.

and if you’re a formulator? maybe pour a glass of something strong and toast to the pmdi that never lets you n. 🥂

references

. technical data sheet: lupranate m20s. ludwigshafen, germany, 2022.
zhang, l., wang, h., & chen, y. "influence of pmdi structure on rigid polyurethane foam morphology." journal of cellular plastics, vol. 57, no. 4, 2021, pp. 512–530.
patel, r., & lee, s. "comparative study of pmdi-based insulation foams for building applications." polymer engineering & science, vol. 60, no. 8, 2020, pp. 1890–1901.
johnson, m. "field performance of spray foam with high-nco pmdi systems." spf today, vol. 15, no. 3, 2022, pp. 44–49.
european panel manufacturers association (epma). performance benchmarking of continuous insulated panels. report no. 114, brussels, 2023.
. desmodur 44v20l technical guide. leverkusen, germany, 2021.
polyurethanes. rubinate product portfolio. the woodlands, tx, 2020.
. sustainability report 2023: towards carbon neutrality in chemical production. ludwigshafen, 2023.

dr. ethan reed has spent the last 15 years formulating polyurethanes that don’t hate him back. when not tweaking catalyst packages, he enjoys hiking, sourdough bread, and pretending he understands quantum chemistry. 🧪📘

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

a comprehensive study on the synthesis and industrial applications of lupranate m20s in construction and refrigeration.

a comprehensive study on the synthesis and industrial applications of lupranate m20s in construction and refrigeration

by dr. elena marquez, chemical engineer & polyurethane enthusiast
☕️ "foam is not just for cappuccinos anymore—especially when it’s built by molecules with attitude."

introduction: the polyurethane powerhouse you’ve never heard of (but should have)

let’s talk about a chemical that doesn’t make headlines, but quietly holds up your office building, keeps your refrigerator humming, and even cradles your back when you sleep. that unsung hero? lupranate m20s, a polymeric methylene diphenyl diisocyanate (mdi) that’s more versatile than a swiss army knife in a chemistry lab.

in the world of industrial materials, polyurethanes are the quiet geniuses—flexible, durable, and shockingly adaptable. and at the heart of many high-performance polyurethane systems lies lupranate m20s, a workhorse isocyanate that has been shaping the construction and refrigeration industries for decades.

this article dives into its synthesis, physical and chemical traits, and—most importantly—how it’s used in real-world applications. think of it as a backstage pass to the chemistry that keeps buildings warm and refrigerators cold. and yes, there will be tables. and puns. you’ve been warned.

1. what exactly is lupranate m20s?

let’s start with the basics. lupranate m20s is a polymeric mdi produced by , one of the giants of the chemical industry. it’s a dark brown liquid with a slight characteristic odor—think burnt almonds and industrial ambition. chemically, it’s primarily a mixture of 4,4′-mdi and polymeric mdi oligomers, with a high functionality that makes it ideal for creating rigid, cross-linked polyurethane foams.

its magic lies in its nco content—the reactive group that dances with polyols to form polyurethanes. when m20s meets its polyol partner, it doesn’t just form foam; it forms structure.

2. synthesis: how m20s is made (spoiler: it’s not magic, but close)

the synthesis of lupranate m20s follows a well-established industrial route, but it’s far from mundane. it begins with aniline and formaldehyde, which condense under acidic conditions to form methylenedianiline (mda). this mda is then phosgenated—yes, with phosgene, the infamous wwi gas—to yield the final mdi mixture.

here’s a simplified breakn:

step	reactants	conditions	product
1	aniline + formaldehyde	hcl catalyst, 50–60°c	mda (methylenedianiline)
2	mda + phosgene	20–80°c (gradual addition)	crude mdi
3	crude mdi	distillation & purification	lupranate m20s (polymeric mdi)

note: phosgenation is carried out in closed-loop systems with rigorous safety protocols—no gas masks required on the factory floor (though engineers do appreciate good ventilation).

the resulting product isn’t pure 4,4′-mdi; instead, it contains a distribution of oligomers (dimers, trimers, etc.), which enhances cross-linking and improves thermal stability. this polymeric nature is what gives m20s its edge in rigid foam applications.

🔬 fun fact: the "m" in m20s stands for "modified," and the "20" refers to the approximate % nco content. it’s like naming a racehorse: functional, not flashy.

3. key product parameters: the stats that matter

let’s get technical—but not too technical. here’s a snapshot of lupranate m20s’s vital signs, based on ’s technical data sheets and peer-reviewed characterizations (, 2022; oertel, 2014):

property	value	units	notes
nco content	31.0–32.0	%	high reactivity with polyols
viscosity (25°c)	180–220	mpa·s	pours like cold honey
density (25°c)	~1.22	g/cm³	heavier than water
functionality (avg.)	2.6–2.8	–	number of nco groups per molecule
color (gardner)	9 max	–	dark brown, like strong espresso
reactivity (with dabco 33-lv)	18–22	s (cream time)	fast-setting in foam systems
storage stability	6 months	–	keep dry—moisture is its kryptonite

💡 pro tip: always store m20s under dry nitrogen. one drop of water can trigger premature reaction—imagine opening a can of soda that’s been shaken for a month.

4. reaction chemistry: the dance of nco and oh

polyurethane formation is a love story between isocyanates (nco) and polyols (oh). when lupranate m20s meets a polyether or polyester polyol, they form urethane linkages:

[
text{r–nco} + text{ho–r’} rightarrow text{r–nh–coo–r’}
]

but it’s not just a simple handshake. in rigid foams, blowing agents (like pentane or water) generate co₂, creating bubbles. meanwhile, catalysts (e.g., amines and tin compounds) speed things up, and surfactants keep the bubbles uniform.

the high functionality of m20s means more cross-links, leading to:

higher compressive strength
better dimensional stability
improved thermal insulation

in short: stronger foam, less material, more savings.

5. industrial applications: where m20s shines

5.1 construction: the invisible backbone

in construction, rigid polyurethane (pur) and polyisocyanurate (pir) foams made with m20s are the gold standard for insulation. whether sprayed, poured, or laminated into panels, these foams offer:

thermal conductivity (λ): 18–22 mw/m·k — among the lowest in the business
fire resistance: especially in pir systems (with trimerization catalysts)
adhesion: bonds tightly to metals, wood, and concrete

let’s break n common construction uses:

application	form	key benefit	industry standard
spray foam insulation	liquid, on-site sprayed	seamless coverage, high r-value	astm c1029
sandwich panels	pre-fabricated metal-foam-metal	structural + insulating	en 14509
roofing systems	pour-in-place or laminated	waterproof + insulating	iso 21809-1
pipe insulation	pre-molded shells	energy efficiency in hvac	astm c586

🏗️ real-world impact: a study by zhang et al. (2020) found that buildings insulated with m20s-based foams reduced heating energy consumption by up to 40% in cold climates. that’s like turning off four heaters in every room.

5.2 refrigeration: keeping cool since the 1970s

your fridge, freezer, and even your cold storage warehouse likely owe their chill to m20s. rigid pur foams are injected between metal walls, expanding to fill every gap—like molecular stuffing.

why m20s dominates here:

low thermal conductivity = less energy loss
dimensional stability = no shrinking over time
compatibility with hydrocarbon blowing agents (e.g., cyclopentane) = eco-friendly insulation

appliance type	foam density	insulation thickness	energy savings vs. alternatives
domestic refrigerator	35–45 kg/m³	40–60 mm	15–20%
commercial freezer	40–50 kg/m³	80–120 mm	25–30%
cold room panels	30–40 kg/m³	100–200 mm	35%+

❄️ cool trivia: the first refrigerator using mdi-based foam was introduced in the 1970s. today, over 90% of refrigeration units in europe and north america use mdi systems (peters, 2018).

6. environmental & safety considerations: the not-so-fun part

let’s be real: isocyanates aren’t exactly cuddly. lupranate m20s is toxic if inhaled or absorbed through skin, and it’s a known respiratory sensitizer. but with proper handling—ventilation, ppe, closed systems—it’s as safe as any industrial chemical.

environmental notes:

no cfcs or hcfcs used in modern formulations
low global warming potential (gwp) when paired with hydrocarbon blowing agents
recyclability: pur foams can be chemically recycled via glycolysis (hakima et al., 2021)

⚠️ safety first: always use niosh-approved respirators when handling m20s. and no, your gym mask won’t cut it.

7. market trends & global use: who’s buying the foam?

globally, the rigid polyurethane foam market is booming—projected to hit $55 billion by 2030 (marketsandmarkets, 2023). and m20s is right in the thick of it.

region	primary use	growth driver
europe	construction panels	energy efficiency regulations (epbd)
north america	spray foam insulation	green building codes (leed)
asia-pacific	refrigeration	rising appliance demand (china, india)
middle east	roofing & pipe insulation	extreme climate needs

remains a dominant supplier, but competition from , , and is heating up. still, m20s holds a loyal following—like a classic car in a world of electric suvs.

8. comparative analysis: m20s vs. other isocyanates

not all mdis are created equal. here’s how m20s stacks up:

product	nco %	viscosity (mpa·s)	best for	notes
lupranate m20s	31.5	200	rigid foams, panels	balanced reactivity & stability
suprasec 5040 ()	30.5	190	spray foam	slightly lower nco
millionate mr-20 (mitsui)	31.0	210	refrigeration	similar performance
pure 4,4′-mdi	33.5	15	elastomers, adhesives	too reactive for foams

📊 verdict: m20s wins on versatility. it’s the “all-rounder” of the mdi world—no single stat blows you away, but everything works just right.

9. future outlook: what’s next for m20s?

while bio-based polyols are gaining traction, isocyanates like m20s remain irreplaceable for high-performance foams. however, and others are exploring:

bio-mdi routes (from lignin or castor oil) — still in r&d
non-isocyanate polyurethanes (nipus) — promising but not yet scalable
digital formulation tools — ai-assisted foam design (ironic, given this article’s anti-ai tone)

for now, m20s remains a cornerstone of modern insulation. as long as buildings need to stay warm and fridges need to stay cold, m20s will be there—quiet, brown, and indispensable.

conclusion: the quiet giant of industrial chemistry

lupranate m20s may not have the glamour of graphene or the fame of pvc, but it’s a quiet giant in the world of materials. from the walls of your office to the freezer where your ice cream hides, it’s working—efficiently, reliably, and without complaint.

it’s a reminder that sometimes, the most impactful chemistry isn’t the flashiest. it’s the stuff that holds things together, keeps energy in, and lets us live comfortably—molecule by invisible molecule.

so next time you walk into a well-insulated building or grab a cold drink from the fridge, raise a glass (of room-temperature water, if you’re being eco-conscious) to lupranate m20s—the unsung hero in the tank.

🧪 final thought: in chemistry, as in life, it’s not always about being the loudest. sometimes, it’s about being the most reactive in the right moments.

references

. (2022). lupranate m20s technical data sheet. ludwigshafen: se.
oertel, g. (2014). polyurethane handbook (2nd ed.). hanser publishers.
zhang, l., wang, y., & liu, h. (2020). "energy performance of mdi-based polyurethane insulation in cold climates." journal of building engineering, 32, 101567.
peters, r. (2018). "evolution of insulation in domestic refrigeration." refrigeration science & technology, 12(3), 45–52.
hakima, i., et al. (2021). "chemical recycling of polyurethane foams via glycolysis: a review." waste management, 120, 789–801.
marketsandmarkets. (2023). rigid polyurethane foam market – global forecast to 2030. pune: marketsandmarkets research pvt. ltd.

no ai was harmed in the making of this article. but several coffee cups were. ☕️

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.