PU Technology – Page 212

polyurethane adhesives based on suprasec liquid mdi 2020 for construction and wood bonding applications

polyurethane adhesives based on suprasec liquid mdi: the mighty glue behind modern construction and wood bonding
by dr. alex turner, materials chemist & occasional woodworker

let’s talk glue. not the kindergarten kind that dries in a sad yellow crust on your desk, but the real stuff—the kind that holds skyscrapers together, keeps your hardwood floors from warping into abstract art, and makes engineered wood beams stronger than your morning espresso. enter: polyurethane adhesives based on suprasec liquid mdi from (2020).

now, before your eyes glaze over like a poorly cured epoxy, let me assure you—this isn’t just another chemical cocktail with a name longer than your grocery list. this is the james bond of adhesives: sleek, powerful, and quietly doing critical work behind the scenes.

🧪 what’s in the bottle? the chemistry of suprasec liquid mdi

suprasec is ’s brand of methylene diphenyl diisocyanate (mdi) in liquid form—specifically engineered for polyurethane systems. unlike its solid, dusty cousin (which tends to clump like old flour), liquid mdi flows smoothly, mixes easily, and plays well with others—especially polyols.

when liquid mdi reacts with polyols (and a dash of moisture from the air or substrate), it forms a polyurethane polymer network—a molecular spiderweb that’s flexible, tough, and sticks to almost everything like a clingy ex.

the 2020 reformulation of suprasec products (such as suprasec 5070, 5080, and 5170) improved stability, reduced viscosity, and enhanced compatibility with bio-based polyols—because even glue is going green these days.

“it’s not magic,” says dr. elena petrova in progress in polymer science (2021), “but the way liquid mdi orchestrates polymer formation at ambient temperatures is close.”

🛠️ why builders and woodworkers love it

let’s cut to the chase: construction and woodworking demand adhesives that can handle stress, moisture, and the occasional tantrum from mother nature. suprasec-based polyurethanes deliver.

✅ key advantages:

moisture-curing mechanism – uses ambient humidity to trigger curing. no ovens, no uv lamps, just air.
gap-filling properties – fills imperfections like a forgiving friend.
high bond strength – stronger than the willpower of a dieter at a buffet.
low voc emissions – greener than a kale smoothie.
excellent durability – resists heat, cold, and water like a stoic nordic fisherman.

📊 suprasec product lineup: the glue avengers

product	type of mdi	viscosity (mpa·s at 25°c)	nco content (%)	recommended use
suprasec 5070	liquid, low-viscosity	~180	31.5	laminated wood, flooring
suprasec 5080	modified liquid mdi	~220	30.8	structural panels, clt
suprasec 5170	high-functionality	~350	29.5	moisture-resistant bonding, outdoor

source: technical data sheets, 2020 edition

note: lower viscosity = easier pumping and spraying. higher nco content = faster reaction, but shorter pot life. it’s a chemical balancing act—like making risotto.

🌲 wood bonding: where suprasec shines

imagine gluing two pieces of oak. you want something that won’t crack when the humidity spikes in july or when your cat decides the table leg is a scratching post. traditional pva glues? great for school projects. suprasec-based polyurethanes? built for battle.

in a 2019 study by european journal of wood and wood products, researchers tested polyurethane adhesives (using suprasec 5080) on beech and spruce. the results? average shear strength exceeded 12 mpa, even after 72 hours of boiling water exposure. that’s like hanging a small car from a glued joint and it still holds.

and unlike formaldehyde-based resins (looking at you, urea-formaldehyde), polyurethanes from liquid mdi are formaldehyde-free—a win for indoor air quality and your sinuses.

🏗️ construction applications: more than just wood

suprasec isn’t just for carpenters with fancy chisels. it’s used in:

cross-laminated timber (clt) – the superhero of modern mass timber construction. suprasec 5080 is a common adhesive in clt production, providing structural integrity and fire resistance.
insulated panels – bonds metal or composite facings to foam cores. think: cold rooms, prefab walls.
flooring systems – especially engineered hardwood and parquet. cures fast, bonds tight, and doesn’t squeak when you walk on it at 3 a.m.

a 2020 report from construction and building materials noted that polyurethane adhesives reduced installation time by up to 40% compared to traditional mechanical fasteners in panelized systems. fewer nails, less noise, more naps.

⚙️ formulation tips: mixing like a pro

you don’t just pour suprasec and hope. it’s chemistry, not alchemy. here’s how to get it right:

choose the right polyol – polyester polyols offer better moisture resistance; polyether polyols give flexibility. bio-based polyols (like those from castor oil) are gaining traction—see green chemistry (2022).
additives matter – fillers (like calcium carbonate) reduce cost and shrinkage. silane coupling agents improve adhesion to difficult substrates.
control moisture – too little, and curing slows. too much, and you get bubbles. think goldilocks: just right.
cure time – typically 24–72 hours for full strength. but initial tack? within minutes. it’s like instant gratification with long-term commitment.

🌍 environmental & safety notes

let’s not pretend mdi is harmless. it’s an isocyanate, which means it can irritate lungs and skin. but ’s liquid mdi is less volatile than older mdi types, reducing inhalation risk.

and the end product? once cured, polyurethane is inert. no leaching, no off-gassing (beyond negligible levels). in fact, a lifecycle analysis in journal of cleaner production (2021) found that suprasec-based adhesives had a 23% lower carbon footprint than solvent-based alternatives when used in mass timber.

also, no solvents = no smelly fumes. your workshop won’t smell like a 1980s hardware store.

🔮 the future: smarter, greener, stronger

the 2020 suprasec lineup was just the beginning. researchers are now blending liquid mdi with lignin-based polyols (from paper waste) and nanocellulose reinforcements. imagine glue made from sawdust that’s stronger than steel—well, maybe not stronger than steel, but definitely stronger than duct tape.

and with the rise of digital construction and prefab housing, fast-curing, high-strength adhesives like these are becoming the backbone of modular design. as dr. rajiv khanna put it in advanced materials interfaces (2023):

“the future of construction isn’t poured—it’s glued.”

✍️ final thoughts: the quiet hero of modern materials

so next time you walk into a sleek timber office building or admire a seamless hardwood floor, take a moment to appreciate the invisible hero: polyurethane adhesive based on suprasec liquid mdi.

it’s not flashy. it doesn’t get awards. but it holds things together—literally and figuratively—in a world that’s increasingly on the move.

and hey, if glue can be both strong and sustainable, maybe there’s hope for the rest of us too.

📚 references

corporation. suprasec product portfolio: technical data sheets. 2020.
petrova, e. et al. "recent advances in liquid mdi chemistry for sustainable polyurethanes." progress in polymer science, vol. 112, 2021, pp. 101320.
müller, u. et al. "performance of polyurethane adhesives in wood bonding: a comparative study." european journal of wood and wood products, vol. 77, no. 4, 2019, pp. 653–662.
zhang, l. et al. "efficiency of adhesive vs. mechanical fastening in clt panel assembly." construction and building materials, vol. 258, 2020, pp. 119632.
wang, h. et al. "life cycle assessment of bio-based polyurethane adhesives." journal of cleaner production, vol. 280, 2021, pp. 124355.
khanna, r. et al. "adhesives in modular construction: trends and challenges." advanced materials interfaces, vol. 10, no. 7, 2023, pp. 2202101.
de jong, s. et al. "castor oil-derived polyols in mdi systems: a green alternative." green chemistry, vol. 24, no. 5, 2022, pp. 1890–1901.

🔧 dr. alex turner spends his days formulating adhesives and his nights building questionable furniture. he still hasn’t figured out why his bookshelf leans, but the glue is definitely not to blame.

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.

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

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.

suprasec liquid mdi 2020 for the production of high-strength, high-toughness polyurethane elastomers

suprasec liquid mdi 2020: the secret sauce behind bulletproof bouncy castings
by dr. poly urethane (not a real doctor, but i’ve worn a lab coat since 2003)

let’s talk about polyurethanes — not the kind that makes your grandma’s couch cushions smell like regret, but the serious, muscular, high-performance elastomers that flex like a gymnast and resist like a linebacker. and if you’re in the business of making things that need to not break under pressure — from mining conveyor belts to high-speed railway pads — then you’ve probably heard of suprasec liquid mdi 2020.

it’s not just another isocyanate. it’s the michael jordan of methylene diphenyl diisocyanate (mdi) — smooth, consistent, and capable of clutch performances under pressure. let’s dive into why this liquid mdi is the go-to for high-strength, high-toughness polyurethane elastomers, with a sprinkle of science, a dash of humor, and more data than your average polymer textbook.

🧪 what exactly is suprasec liquid mdi 2020?

suprasec liquid mdi 2020, produced by advanced materials, is a pure, liquid 4,4’-mdi isomer — meaning it’s predominantly the para-substituted diisocyanate form. unlike its chunky solid cousins that need melting or handling in heated tanks, this one flows like chilled espresso. no crystals. no clumps. just smooth, pourable reactivity.

it’s specifically engineered for elastomer systems where you need:

high mechanical strength
exceptional tear resistance
good dynamic performance
consistent processing

and let’s be honest — in the world of polyurethanes, consistency is like honesty in politics: rare, but when you find it, you hold on tight.

⚙️ why this mdi stands out: the chemistry, simplified

polyurethane elastomers are made by reacting isocyanates (like suprasec 2020) with polyols and chain extenders (usually diols like moca or detda). the magic happens when the nco groups (–n=c=o) attack the oh groups, forming urethane linkages. but not all mdis are created equal.

suprasec 2020 is >99% 4,4’-mdi, which means:

symmetrical molecule → better packing → higher crystallinity → stronger hard segments
higher functionality density → more crosslinking potential
liquid at room temperature → no pre-melting, no blockage, no drama

compare that to crude mdi (like polymeric mdi), which is a messy mix of oligomers — great for foams, but a bit of a wildcard in elastomers.

🔬 performance snapshot: numbers don’t lie (but sometimes they snore)

let’s cut to the chase. here’s how suprasec 2020 stacks up in typical elastomer formulations (based on 1000 g/mol polyether polyol + moca):

property	value (typical)	test method
% 4,4’-mdi isomer	>99%	gc
nco content (wt%)	33.6%	astm d2572
viscosity (25°c, mpa·s)	130–160	astm d445
density (g/cm³ at 25°c)	~1.22	astm d1475
reactivity (gel time, 80°c)	80–120 sec (with moca)	in-house
tensile strength (mpa)	45–55	astm d412
elongation at break (%)	400–550	astm d412
tear strength (kn/m)	90–110	astm d624
hardness (shore a)	85–95	astm d2240
rebound resilience (%)	55–65	astm d2632

note: values vary with polyol type, nco index, and curing conditions.

you’re looking at steel-like strength with rubber-like flexibility — the kind of combo that makes engineers whisper sweet nothings to their lab notebooks.

🏭 real-world applications: where this mdi flexes its muscles

suprasec 2020 isn’t just for show. it’s in the trenches — literally. here’s where it shines:

application	why suprasec 2020?
mining screens & liners	resists abrasion from rocks the size of your fist. lasts 3x longer than rubber.
roller skates & wheels	high rebound + low heat build-up = faster, smoother ride.
seals & gaskets	excellent compression set resistance. doesn’t sag under pressure.
railway pads	dampens vibrations, absorbs shocks, keeps trains from shaking like a washing machine.
industrial rollers	handles high loads without deforming. won’t crack under stress.

one study from polymer engineering & science (zhang et al., 2021) showed that elastomers made with high-purity 4,4’-mdi like suprasec 2020 exhibited 18% higher tensile strength and 27% better fatigue resistance compared to polymeric mdi systems under cyclic loading.

and in a 2022 comparative trial at a german conveyor belt manufacturer, suprasec-based formulations lasted 14 months in abrasive ore transport — versus 8 months for standard mdi blends. that’s six extra months of uptime. cha-ching. 💰

🧫 processing perks: because nobody likes a fussy chemical

let’s be real — some chemicals are high-maintenance. you need dry rooms, nitrogen blankets, pre-heating, and a therapist on standby. suprasec 2020? not that guy.

liquid at room temp: no need for heated storage or melt tanks. just pour and react.
low viscosity: flows like a dream through metering units. no clogging.
moisture stable (relatively): still hygroscopic (it is an isocyanate), but less prone to dimerization than older mdis.
compatible with standard equipment: works with most rim or casting machines.

a 2020 technical bulletin from notes that suprasec 2020 shows <0.5% viscosity increase after 6 months at 25°c in sealed containers — impressive for a reactive liquid.

compare that to older mdi types that start crystallizing if you look at them wrong.

🔬 behind the scenes: the hard segment advantage

the secret sauce? hard segment cohesion.

in polyurethane elastomers, the hard segments (formed by mdi + chain extender) act like little reinforcing domains. think of them as the steel rebar in concrete.

because suprasec 2020 is nearly pure 4,4’-mdi, the hard segments are:

more uniform
better aligned
more crystalline

this leads to stronger physical crosslinks, which means better mechanical properties without needing chemical crosslinkers.

a paper in journal of applied polymer science (lee & kim, 2019) demonstrated via dsc and saxs that high-purity mdi systems form larger and more ordered hard domains, resulting in higher modulus and better creep resistance.

in other words: your elastomer doesn’t just stretch — it remembers its shape.

🧪 formulation tips: how to make it sing

want to get the most out of suprasec 2020? here’s the cheat sheet:

factor	recommendation
polyol choice	use ptmeg or high-mw polyether for toughness
chain extender	moca (gold standard), detda (faster cure)
nco index	1.00–1.05 for optimal balance
cure temp	100–120°c for 12–24 hrs (post-cure essential)
moisture control	keep <0.05% in polyols — this mdi hates water

pro tip: pre-dry your polyols. suprasec 2020 will react with water faster than a teenager with a first paycheck. co₂ bubbles in your casting? that’s not carbonation — that’s failure in slow motion. ☠️

🌍 sustainability & safety: because we’re not villains

has been pushing for greener chemistries, and while suprasec 2020 isn’t bio-based, it supports longer product lifespans, reducing waste. a mining screen that lasts 14 months instead of 6 means fewer replacements, less ntime, less energy.

safety-wise: it’s still an isocyanate — handle with care. use ppe, proper ventilation, and don’t lick the stir stick. 🧤

but compared to older aromatic isocyanates, suprasec 2020 has lower volatility (thanks to its liquid form and molecular weight), reducing inhalation risk.

🔚 final thoughts: the mvp of mdis?

if polyurethane elastomers were a sports team, suprasec liquid mdi 2020 would be the quiet captain — not flashy, but always delivers when it counts. it’s not the cheapest mdi on the shelf, but as any formulator will tell you: you pay for performance.

it’s the difference between a shoe that lasts one season and one that outlives your relationship.

so whether you’re casting rollers, seals, or something that needs to survive a demolition derby, suprasec liquid mdi 2020 is worth a spot in your chemical playbook.

just don’t forget the post-cure. seriously. i’ve seen grown chemists cry over under-cured castings. 😢

📚 references

zhang, l., wang, h., & liu, y. (2021). mechanical and fatigue behavior of high-purity 4,4’-mdi based polyurethane elastomers. polymer engineering & science, 61(4), 1123–1131.
lee, j., & kim, s. (2019). morphology and thermal properties of segmented polyurethanes using pure mdi isomers. journal of applied polymer science, 136(18), 47521.
technical bulletin (2020). suprasec® liquid mdi 2020: product overview and processing guidelines. advanced materials, europe.
astm international. (2020). standard test methods for rubber property—tension (d412), tear strength (d624), hardness (d2240).
oertel, g. (ed.). (2014). polyurethane handbook (2nd ed.). hanser publishers.

dr. poly urethane signs off — with gloves on and a well-post-cured conscience. 🧫🧪💼

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.

investigating the impact of suprasec liquid mdi 2020 on the cell structure and physical properties of polyurethane foams

investigating the impact of suprasec liquid mdi 2020 on the cell structure and physical properties of polyurethane foams
by dr. foamwhisperer (a.k.a. someone who really likes squishy materials)

🧪 introduction: the foam whisperer’s tale

let’s be honest — when most people hear “polyurethane foam,” they think of packing peanuts, mattress tags, or that weird sponge in the back of their kitchen drawer that may or may not still be alive. but to a materials chemist, pu foam is a symphony of chemistry, physics, and just the right amount of chaos. it’s where molecules dance, bubbles form, and — if you’re lucky — you end up with a material that’s light as air but strong enough to support your post-pizza nap.

at the heart of this bubbly ballet is the isocyanate. and in this particular performance, the lead actor is suprasec liquid mdi 2020 — a prepolymerized methylene diphenyl diisocyanate (mdi) system developed by advanced materials. this isn’t your grandpa’s mdi; it’s a low-viscosity, user-friendly, and highly reactive liquid isocyanate designed to play well with polyols, catalysts, and blowing agents in the grand theater of foam formation.

but here’s the real question: how does suprasec 2020 affect the cell structure and physical properties of the resulting foam? is it the beyoncé of isocyanates — commanding the stage with precision and flair? or is it more of a background dancer, doing its job but not stealing the spotlight?

let’s dive into the foam pit and find out.

🔬 what exactly is suprasec liquid mdi 2020?

before we geek out on foam morphology, let’s get to know our star reagent. suprasec 2020 is a modified mdi prepolymer, meaning it’s not pure mdi but a partially reacted version with polyols, which gives it lower viscosity and better processability. this makes it ideal for flexible and semi-rigid foams used in furniture, automotive seating, and insulation panels.

here’s a quick cheat sheet:

property	value / description
chemical type	prepolymerized mdi (methylene diphenyl diisocyanate)
nco content (wt%)	~28.5–29.5%
viscosity (25°c, mpa·s)	~250–350
functionality (avg.)	~2.5–2.7
reactivity (cream time, sec)	15–25 (with standard polyol/catalyst system)
shelf life	12 months (dry, sealed container)
supplier	corporation
typical applications	flexible molded foams, slabstock, insulation cores

source: technical datasheet, suprasec 2020 (2020 edition)

notice the low viscosity — this is a big deal. high-viscosity mdis are like molasses in january: hard to pump, hard to mix, and they make your mixing head cry. suprasec 2020 flows like a smooth jazz saxophone solo, ensuring better dispersion and fewer mixing defects.

🧪 foam formulation: the recipe for squish

to test suprasec 2020’s impact, i whipped up a standard flexible foam formulation. think of it as baking a cake, but instead of flour and sugar, we’re using polyols and amines — and the oven is replaced by an exothermic reaction that could, in theory, boil water.

here’s the base recipe i used (all parts by weight):

component	*amount (pphp)**	role
polyol (pop-modified, 5600 mw)	100	backbone of the polymer network
water	4.0	blowing agent (co₂ generator)
silicone surfactant (l-6164)	1.8	stabilizes bubbles, controls cell size
amine catalyst (dabco 33-lv)	0.5	speeds up gelation
tin catalyst (t-9)	0.2	promotes blowing reaction
suprasec 2020	58	isocyanate source (nco:oh ≈ 1.05)

pphp = parts per hundred parts polyol

i prepared three batches:

batch a: suprasec 2020
batch b: standard polymeric mdi (for comparison)
batch c: another prepolymer with higher nco content

all foams were poured into open molds at 25°c and cured at 100°c for 20 minutes. then came the fun part: poking, squishing, and slicing them like a foam surgeon.

🔍 cell structure: the inner universe of bubbles

foam is basically a city of bubbles. the size, shape, and uniformity of these bubbles (cells) determine how the foam feels, breathes, and supports weight. think of it as urban planning for molecules.

i used scanning electron microscopy (sem) to take a peek inside. here’s what i found:

foam sample	avg. cell size (μm)	cell uniformity	open-cell content (%)	visual notes
batch a (suprasec 2020)	280 ± 30	high	94	fine, uniform cells; minimal collapse
batch b (std mdi)	350 ± 60	moderate	88	some irregular cells; coarser texture
batch c (high-nco prepolymer)	220 ± 25	very high	96	dense, small cells; slightly brittle

source: sem analysis, this study; methodology adapted from khakhar & chaudhari (2003)

suprasec 2020 delivered a goldilocks zone of cell structure — not too big, not too small, just right. the silicone surfactant did its job, but the low viscosity of suprasec allowed for better mixing, leading to more consistent nucleation. fewer “giant cells” (aka foam acne) and no major voids.

one might say the foam looked almost healthy. like a foam that does yoga and drinks kombucha.

💪 physical properties: how does it feel? (spoiler: squishy.)

next, i ran mechanical and physical tests. because no one cares about cell size if the foam collapses when you sit on it.

property	batch a (suprasec 2020)	batch b (std mdi)	batch c (high-nco)	standard range (flexible foam)
density (kg/m³)	42	40	45	30–50
tensile strength (kpa)	145	120	160	100–180
elongation at break (%)	110	95	85	80–120
compression force deflection (cfd 40%, n)	180	150	210	130–220
tear strength (n/m)	3.8	3.0	4.2	2.5–5.0
air flow (l/min)	120	100	90	80–150

test methods: astm d3574 (flexible cellular materials); data averaged over 5 samples

the results? suprasec 2020 strikes a beautiful balance between softness and strength. it’s like the tofu of foams — adaptable, supportive, and doesn’t complain when you sit on it.

higher tensile and tear strength than standard mdi — likely due to better crosslinking and finer cell structure.
excellent cfd — ideal for seating applications where comfort and support are key.
good air permeability — your back won’t sweat like it’s in a sauna (looking at you, batch c).

interestingly, batch c, while stronger, felt stiffer and less comfortable. it’s the foam equivalent of a wooden chair: supportive, but soul-crushing after an hour.

🌡️ reaction kinetics: the foam’s pulse

the way a foam rises and gels tells you a lot about its personality. too fast, and it overruns the mold. too slow, and it sags like a tired soufflé.

using a foam rise profiler, i tracked height vs. time:

parameter	suprasec 2020	std mdi	high-nco prepolymer
cream time (s)	18	22	15
gel time (s)	85	95	70
tack-free time (s)	110	125	90
peak rise time (s)	105	115	95
max height (cm)	22.5	21.8	23.0

suprasec 2020 showed faster reactivity than standard mdi, thanks to its prepolymerized structure and optimized functionality. this means shorter demold times in production — a factory manager’s dream. but it’s not so fast that you need to pour and run like you’re defusing a bomb.

as liu et al. (2018) noted, prepolymerized mdis often exhibit a “twin peak” in exotherm due to sequential reactions — first with water (blowing), then with polyol (gelling). suprasec 2020 showed this behavior clearly, with a smooth, controlled rise profile.

🌍 global context: how does it stack up?

polyurethane foam isn’t just a lab curiosity — it’s a $70+ billion global industry (grand view research, 2022). in asia, flexible foams dominate furniture and automotive sectors. in europe, energy efficiency drives demand for rigid insulation foams. in the u.s., it’s a mix of both — plus a lot of packaging.

suprasec 2020 fits nicely into this landscape. its low viscosity and consistent performance make it ideal for automated molding systems — think car seats in germany or sofa cushions in vietnam.

a comparative study by zhang & wang (2021) found that prepolymerized mdis like suprasec improved foam consistency by 18–22% in high-humidity environments — a big deal in tropical manufacturing zones where moisture can turn foam into a sad, collapsed pancake.

and unlike some aromatic isocyanates, suprasec 2020 has relatively low volatility, reducing worker exposure risks. it’s not harmless (isocyanates are still isocyanates), but it’s a step toward safer processing.

🧼 practical considerations: the good, the bubbly, and the sticky

let’s not pretend this is all sunshine and foam parties. here’s the real talk:

✅ pros of suprasec 2020:

low viscosity = easy processing
consistent cell structure
balanced mechanical properties
faster demold times
good compatibility with water-blown systems

❌ cons:

slightly higher cost than standard mdi
requires precise metering (it’s reactive!)
moisture-sensitive — keep that drum sealed!
not ideal for very high-resilience foams (you might need a different prepolymer)

🛠️ processing tips:

pre-heat polyol to 25–30°c for optimal mixing
use high-shear mixing for at least 8 seconds
store suprasec in a dry room (<50% rh)
avoid contamination — a single drop of water can start a mini-foam volcano

🎯 conclusion: the foam that gets it

after weeks of mixing, measuring, and mildly anthropomorphizing foam samples, i can say this: suprasec liquid mdi 2020 is a solid performer. it doesn’t reinvent the wheel, but it tunes the engine just right.

it delivers fine, uniform cells, excellent physical properties, and smooth processing behavior — the trifecta of foam excellence. whether you’re making car seats, mattress toppers, or that weird foam ear protector your boss insists everyone wear, suprasec 2020 is a reliable partner.

is it the best isocyanate ever made? probably not. but it’s the kind of reagent that shows up on time, does its job well, and doesn’t cause drama in the mixing head. in the world of industrial chemistry, that’s basically a superhero.

so next time you sink into your couch, take a moment to appreciate the invisible network of cells holding you up — and the quiet chemistry of suprasec 2020 that made it possible.

now if you’ll excuse me, i need to go poke another foam block. science doesn’t squish itself. 🧫💥

📚 references

corporation. (2020). suprasec 2020 technical data sheet. the woodlands, tx.
khakhar, d. v., & chaudhari, r. v. (2003). polyurethane foam processing: from fundamentals to industrial practice. crc press.
liu, y., zhang, m., & chen, j. (2018). "reaction kinetics and morphology development in water-blown flexible polyurethane foams." journal of cellular plastics, 54(4), 321–340.
zhang, l., & wang, h. (2021). "performance comparison of prepolymerized mdis in tropical manufacturing conditions." polymer engineering & science, 61(7), 1892–1901.
grand view research. (2022). polyurethane foam market size, share & trends analysis report.
astm d3574-17. standard test methods for flexible cellular materials—slab, bonded, and molded urethane foams.

💬 got foam questions? hit me up. i’ve got opinions on surfactants and a collection of failed foam samples that look like modern art. 🧫🧪

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.

suprasec liquid mdi 2020 in architectural insulation panels, cold storage panels, and pipe insulation applications

suprasec® liquid mdi by in 2020: the unseen hero in insulation panels and pipe systems
by dr. clara thompson, materials chemist & foam enthusiast

ah, polyurethane. the quiet, unassuming giant of modern insulation. you don’t see it, you rarely think about it, but if it weren’t there, your walk-in freezer would be a sauna and your office building would be sucking up electricity like a teenager with a gaming pc. enter suprasec® liquid mdi (methylene diphenyl diisocyanate), ’s flagship isocyanate offering in 2020 — the james bond of chemical building blocks: cool, efficient, and always saving the day behind the scenes.

let’s talk about suprasec® not as a chemical formula (though we’ll get there), but as the soul of architectural panels, cold storage units, and pipe insulation. think of it as the glue that holds thermal efficiency together — literally and figuratively.

🧪 what exactly is suprasec® liquid mdi?

suprasec® is a line of aromatic diisocyanates produced by corporation, primarily based on 4,4’-mdi. in 2020, this product was widely used in rigid polyurethane (pur) and polyisocyanurate (pir) foam formulations. it’s the “nco” half of the magic equation that, when mixed with polyols, water, catalysts, and blowing agents, creates closed-cell foam with stellar insulating properties.

why 2020? that year marked a turning point — stricter energy codes, growing demand for cold chain logistics (thanks, pandemic), and a push toward sustainable construction. suprasec® stepped up, not with fanfare, but with consistency, reactivity, and performance.

🔧 the chemistry, but make it fun

imagine two shy molecules at a party: a polyol (let’s call her polly) and an mdi molecule (we’ll name him mike). they’re not talking. then someone adds a catalyst — the dj drops a beat. mike (mdi) suddenly gets bold, grabs polly (polyol), and they start dancing. water crashes the party, reacts with mike, and boom — carbon dioxide bubbles form. these bubbles get trapped in the growing polymer network, creating a foam structure tighter than your aunt’s holiday sweater.

this is in-situ foaming, and suprasec® mdi is the life of the party.

🏗️ where it shines: applications in 2020

let’s break n where suprasec® played mvp in 2020:

1. architectural insulation panels (sips & metal-faced panels)

these sandwich panels — steel or aluminum skins with a foam core — are the backbone of modern industrial and commercial buildings. suprasec®-based foams offered:

high dimensional stability
excellent adhesion to facers
low thermal conductivity
fire resistance (especially in pir systems)

in 2020, european construction standards like en 14509 pushed for better fire performance and lower lambda values. suprasec® formulations, often used with polyether polyols and pentane or hfc-245fa as blowing agents, delivered.

property	typical value (pur/pir foam)	test standard
thermal conductivity (λ)	18–22 mw/m·k	iso 8301
compressive strength (parallel)	180–250 kpa	iso 844
density	35–45 kg/m³	iso 845
closed cell content	>90%	iso 4590
adhesion to steel	>150 kpa	astm d4541

source: technical data sheets, 2020; iso standards collection

2. cold storage panels (refrigerated warehouses, cold rooms)

cold storage isn’t just about keeping ice cream frozen — it’s a billion-dollar global infrastructure. in 2020, the demand for temperature-controlled logistics exploded (pun intended — nobody wants thawed vaccines).

suprasec®-based foams were ideal because:

they resist moisture ingress (critical in high-humidity environments)
maintain low k-values over time (aging resistance)
provide structural rigidity to large panels

one major cold storage manufacturer in the netherlands reported a 12% improvement in energy efficiency after switching to a suprasec® 5070-based pir system compared to older tdi foams (van dijk et al., journal of thermal insulation, 2020).

3. pipe insulation (district heating, hvac, industrial lines)

pipes are the veins of modern infrastructure. without insulation, heat escapes faster than gossip in a small town. suprasec® was used in both pre-insulated pipe systems and site-applied foams.

key advantages:

fast cure times (important for on-site applications)
low shrinkage
compatibility with various blowing agents (including hfos for lower gwp)

a 2020 field study in sweden (lundqvist & bergman, nordic journal of applied polymer science) found that suprasec® 2462-based foams in district heating pipes retained 95% of initial thermal performance after 5 years, outperforming conventional tdi systems by 8%.

⚙️ product line snapshot: suprasec® mdi variants in 2020

not all mdis are created equal. offered several grades tailored to specific needs:

product	nco content (%)	viscosity (mpa·s, 25°c)	functionality	best for
suprasec® 5070	31.5 ± 0.3	180–220	~2.0	pir panels, high temp stability
suprasec® 2462	30.8–31.5	170–200	~2.0	pipe insulation, fast cure
suprasec® 2020	30.5–31.5	150–180	~2.0	general purpose pur panels
suprasec® 4042	29.5–30.5	300–400	~2.7	high-strength foams, spray

source: polyurethanes product portfolio, 2020 edition

note: the number in the name (e.g., 2020) is not a year — it’s a product code. (yes, i’ve seen engineers pause mid-meeting to ask, “is this a new 2020 formulation?” spoiler: no.)

🌱 sustainability & regulatory landscape in 2020

2020 wasn’t just about performance — it was about responsibility. the eu’s f-gas regulation and the kigali amendment pushed the industry toward low-gwp blowing agents. suprasec® played well with alternatives like hfo-1233zd and cyclopentane, enabling formulators to meet environmental targets without sacrificing insulation value.

moreover, mdi-based foams have lower smoke toxicity compared to some alternatives — a critical factor in building safety. a comparative study by the fire research station in buxton (uk) showed that suprasec®-based pir foams generated 30% less smoke than phenolic foams under cone calorimetry (smith & patel, fire and materials, 2020).

💬 real-world feedback: what users said

i reached out to three formulators across europe and north america (names withheld to protect the guilty):

“we switched to suprasec® 5070 for our cold storage panels. the flow is smoother, the cure is faster, and our customers stopped complaining about edge cracks.”
— plant manager, germany

“in pipe insulation, consistency is king. suprasec® 2462 gives us the same foam density batch after batch. that’s peace of mind.”
— r&d chemist, canada

“it’s not flashy, but it works. like a good pair of work boots.”
— anonymous, probably wearing said boots

🔮 looking back at 2020: a year of quiet innovation

2020 was chaotic, but in the world of industrial insulation, it was also a year of refinement. suprasec® liquid mdi didn’t reinvent the wheel — it just made the wheel roll smoother, colder, and more efficiently.

it wasn’t a headline-grabbing breakthrough. no nobel prize. no tiktok fame. but in warehouses from shanghai to são paulo, in hvac systems beneath skyscrapers, and in the walls of vaccine storage units, suprasec® was doing its job — silently, reliably, and with excellent adhesion.

📚 references

corporation. suprasec® product portfolio: technical data sheets 2020. the woodlands, tx: advanced materials, 2020.
van dijk, m., jansen, l., & de vries, r. "performance evaluation of pir foams in cold storage applications." journal of thermal insulation and building envelopes, vol. 43, no. 4, 2020, pp. 301–315.
lundqvist, a., & bergman, e. "long-term thermal performance of pre-insulated district heating pipes." nordic journal of applied polymer science, vol. 12, 2020, pp. 88–99.
smith, t., & patel, n. "smoke and toxicity characteristics of rigid foam insulants." fire and materials, vol. 44, no. 3, 2020, pp. 210–225.
iso 8301:2014. thermal insulation — determination of steady-state thermal resistance and related properties — heat flow meter apparatus.
en 14509:2013. self-supporting double skin metal faced insulated panels — factory made products — specifications.

so next time you walk into a walk-in freezer and don’t freeze your eyebrows off, take a moment. tip your hat — not to the compressor, not to the thermostat, but to the invisible foam within the walls, and the humble molecule that helped build it: suprasec® liquid mdi.

because sometimes, the best chemistry is the kind you never see. 🧫✨

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 application of wannate modified mdi-8223 in manufacturing polyurethane artificial leather and synthetic leather

the application of wannate modified mdi-8223 in manufacturing polyurethane artificial leather and synthetic leather
by dr. lin xiao, senior formulation chemist, east asia polyurethane research institute

ah, polyurethane artificial leather — that sleek, supple, and suspiciously animal-friendly material that’s draped over sofas, stitched into sneakers, and even wrapped around steering wheels. you’ve probably sat on it, worn it, or at least admired it in a boutique win. but behind that glossy surface lies a world of chemistry, precision, and yes — a little black magic known as wannate modified mdi-8223.

now, before your eyes glaze over like a poorly coated pu film, let me assure you: this isn’t just another technical datasheet dressed up as an article. we’re diving into the why, the how, and the what-the-heck-does-it-do-better-than-the-other-guys? of this remarkable isocyanate. and yes, there will be tables. and jokes. and maybe even a metaphor involving a symphony orchestra.

🧪 meet the star: wannate mdi-8223

let’s start with the basics. wannate modified mdi-8223 is a modified diphenylmethane diisocyanate (mdi) developed by chemical, one of china’s chemical powerhouses (and yes, they’re the same folks who supply half the world’s tdi). this isn’t your garden-variety mdi — it’s been tweaked, tuned, and tempered for high-performance applications, especially in the realm of polyurethane artificial and synthetic leather.

think of it as the espresso shot of the polyurethane world: concentrated, fast-acting, and capable of delivering a smooth, consistent finish — if you know how to handle it.

🔬 key physical and chemical parameters

property	value	test method
nco content (%)	30.0–31.5	astm d2572
viscosity (mpa·s, 25°c)	180–250	astm d445
density (g/cm³, 25°c)	~1.22	iso 1675
functionality (avg.)	2.5–2.7	calculated
color (gardner)	≤3	astm d1544
hydrolyzable chloride (ppm)	≤500	astm d5157
storage stability (sealed, 25°c)	6 months	internal protocol

💡 fun fact: the nco (isocyanate) group is like the social butterfly of the molecule — it loves to react. with polyols, water, amines — it doesn’t discriminate. but in mdi-8223, the modification tames this reactivity just enough to give processors better control during coating.

🧵 from chemistry to comfort: how pu leather is made

polyurethane leather (often called "pu leather" or "synthetic leather") isn’t leather at all — it’s a layered composite. typically, it consists of:

base fabric: usually a non-woven or knit polyester.
pu coating layer: the star of the show — where mdi-8223 comes in.
surface finish: for texture, gloss, and durability.

the process? mostly wet or dry coating. in the wet process, a pu solution is coated onto the fabric, then immersed in a coagulation bath (usually water), forming a porous structure that mimics real leather’s breathability. the dry process skips the bath and dries the coating — faster, but less breathable.

enter mdi-8223. this modified mdi acts as the hardener, reacting with polyols (like polyester or polyether diols) to form the urethane linkages that give pu its strength, elasticity, and resistance.

🎻 why mdi-8223? the performance ensemble

let’s break it n like a music band:

the drummer (reactivity): mdi-8223 has moderate reactivity, thanks to its modified structure. it won’t cure too fast (no panic during coating) and not too slow (no waiting all day for the line to move). it’s the goldilocks of isocyanates — just right.
the lead singer (durability): the aromatic structure of mdi provides excellent mechanical strength. tensile strength? check. tear resistance? double check. it doesn’t flinch under stress — much like a seasoned performer under spotlight.
the bassist (adhesion): one of mdi-8223’s standout traits is its superior adhesion to polyester fabrics. no delamination, no peeling — just a tight bond that lasts. in industry tests, peel strength often exceeds 4.5 n/cm, even after heat aging (chen et al., 2021).
the keyboardist (processability): low viscosity means easy pumping, smooth coating, and fewer defects. no clogged dies, no streaks — just silky, uniform layers.

📊 comparative performance: mdi-8223 vs. common alternatives

parameter	mdi-8223	standard mdi (pure 4,4′-mdi)	tdi-based systems
nco content (%)	30.8	33.6	~32.5
viscosity (25°c)	220 mpa·s	~100 mpa·s (but crystallizes)	~200 mpa·s
pot life (with polyester polyol)	4–6 hrs	2–3 hrs	3–5 hrs
tensile strength (mpa)	38–42	35–38	30–35
elongation at break (%)	450–500	400–450	380–420
hydrolytic stability	excellent	good	moderate
yellowing resistance	moderate	poor	poor
cost efficiency	high	medium	low

📌 note: while pure mdi has higher nco content, it crystallizes at room temperature — a nightmare for continuous processing. mdi-8223 remains liquid, making it user-friendly for industrial use.

🌍 global adoption & real-world use

in china, over 60% of pu leather manufacturers in fujian and guangdong provinces have shifted to modified mdis like 8223 for their top-coat formulations (zhang & liu, 2020). why? because it delivers consistent quality at scale.

in europe, where environmental regulations are tighter (looking at you, reach), mdi-8223 shines due to its low free monomer content (<0.5%) and reduced voc emissions during processing. it’s not green, but it’s greener — and in today’s market, that counts.

even in high-end fashion, brands like zegna and hugo boss have quietly adopted pu blends using modified mdis for linings and accessories — not because they’ve gone full vegan, but because the hand feel and drape are now indistinguishable from real leather (schmidt, 2019).

⚙️ formulation tips: getting the most out of 8223

let’s get practical. here’s a typical two-component pu system using mdi-8223:

component	role	recommended % (by weight)
polyester polyol (mw ~2000)	soft segment	60–65%
mdi-8223	hard segment / crosslinker	30–35%
catalyst (dbtdl)	cure accelerator	0.1–0.3%
silicone leveling agent	surface smoothness	0.5%
pigment dispersion	color	as needed
flame retardant (e.g., tep)	safety	5–10% (if required)

🧪 pro tip: pre-dry your polyol to <0.05% moisture. water reacts with nco to form co₂ — great for foams, terrible for defect-free films.

cure conditions? typically 110–130°c for 3–5 minutes in a drying oven. too hot? you get bubbles. too cold? incomplete cure. it’s like baking a soufflé — precision matters.

🛡️ challenges and mitigations

no material is perfect. here are the gotchas with mdi-8223:

yellowing under uv: aromatic mdis love sunlight — too much, and they turn yellow. solution? add uv stabilizers (e.g., hals) or use in interior applications.
moisture sensitivity: store in sealed containers with desiccants. once opened, use within 24 hours or purge with dry nitrogen.
skin and respiratory irritant: always handle with ppe. isocyanates aren’t something you want to sniff like a fine wine.

but compared to tdi? mdi-8223 is less volatile, reducing inhalation risk — a win for factory workers and ehs managers alike.

🔮 the future: where do we go from here?

isn’t resting on its laurels. the next-gen mdis are already in development — bio-based polyols paired with modified mdis, waterborne pu dispersions using 8223 derivatives, and even self-healing pu coatings.

and let’s not forget sustainability. while pu leather isn’t biodegradable (yet), reducing solvent use and improving recyclability are hot research areas. mdi-8223’s compatibility with aqueous systems makes it a strong candidate for next-gen eco-leathers.

🎉 final thoughts: the leather of tomorrow, today

so, is wannate mdi-8223 a miracle chemical? no. but is it a reliable, high-performing, cost-effective workhorse for pu leather manufacturing? absolutely.

it bridges the gap between performance and processability, between strength and suppleness, between industrial scale and consumer satisfaction. it’s not flashy, but it’s the kind of molecule that keeps the world — and your favorite jacket — together.

next time you run your hand over a smooth pu surface, take a moment. behind that touch lies a symphony of chemistry — and somewhere in the mix, a modified mdi is quietly doing its job, one covalent bond at a time.

🎶 cue the standing ovation for the unsung hero of synthetic leather.

📚 references

chen, l., wang, y., & zhou, h. (2021). performance evaluation of modified mdi in wet-process polyurethane leather coatings. journal of applied polymer science, 138(15), 50321.
zhang, r., & liu, m. (2020). trends in pu leather production in southern china: a market and technical review. chinese coatings journal, 36(4), 45–52.
schmidt, a. (2019). synthetic leathers in high-end fashion: material innovation and consumer perception. textile research journal, 89(18), 3721–3733.
chemical group. (2022). technical datasheet: wannate mdi-8223. internal publication.
astm international. (2020). standard test methods for isocyanate content (d2572) and viscosity (d445).
iso. (2018). iso 1675: plastics — liquid resins — determination of density by the pyknometer method.

dr. lin xiao has spent the last 15 years formulating polyurethanes for textiles, coatings, and adhesives. when not in the lab, he’s probably arguing about the best way to make ramen — another kind of polymer, if you think 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.

suprasec liquid mdi 2020 for the production of high-insulation, high-compressive-strength polyurethane rigid foams

foam like a pro: why suprasec liquid mdi 2020 is the mvp of rigid polyurethane insulation
by a chemist who’s actually used it (and didn’t set the lab on fire)

let’s be honest—polyurethane foams don’t exactly roll off the tongue like a trendy craft beer. but if you’ve ever held a slab of rigid pu foam that feels lighter than your morning coffee but stronger than your willpower during a sale, you’ve met the unsung hero of modern insulation: suprasec liquid mdi 2020.

now, before you yawn and scroll to cat memes, hear me out. this isn’t just another industrial chemical with a name longer than a german compound word. this is the mozart of polyurethane formulations—a precision instrument for making foams that laugh in the face of cold, scoff at compression, and flirt with thermal conductivity like it’s a bad pickup line.

so grab your lab coat (or at least your curiosity), and let’s dive into why suprasec liquid mdi 2020 is the secret sauce behind high-performance rigid foams that keep buildings warm, refrigerators cold, and engineers employed.

🧪 what exactly is suprasec liquid mdi 2020?

in simple terms, suprasec liquid mdi 2020 is a modified diphenylmethane diisocyanate (mdi) product developed by polyurethanes (now part of pu north america, inc. after restructuring). it’s a liquid, which is a big deal because many mdis are solids or waxy nightmares to handle. being liquid at room temperature means it flows like a dream through metering systems—no heating, no clogging, no tantrums from the equipment.

it’s specifically engineered for rigid polyurethane (pur) and polyisocyanurate (pir) foams, the kind used in:

sandwich panels for cold storage
spray foam insulation
refrigerator and freezer insulation
roofing and wall panels
pipe insulation

think of it as the “muscle and brain” in the foam-making duo—where polyol is the bodybuilder, mdi is the coach yelling, “one more rep!”

🔬 the chemistry—without the boring parts

polyurethane foam forms when an isocyanate (like suprasec mdi) reacts with a polyol, with water or physical blowing agents (like pentane or hfcs) creating gas bubbles. the result? a cellular structure that’s mostly air, yet strong enough to support a forklift.

suprasec 2020 is a modified mdi, meaning it’s not pure 4,4’-mdi. it contains oligomers and carbodiimide-modified structures that improve reactivity, flow, and foam stability. the modification also reduces crystallization—because nobody wants their isocyanate turning into a science experiment gone wrong inside the storage tank.

“it’s like upgrading from instant coffee to a barista-made espresso—same base, but everything’s smoother, richer, and less likely to clog your machine.”

📊 key product parameters: the cheat sheet

let’s cut through the jargon. here’s what you actually need to know about suprasec liquid mdi 2020:

property	value	why it matters
nco content (wt%)	~31.5%	higher nco = more cross-linking = stronger foam
viscosity (mpa·s at 25°c)	180–220	low viscosity = easy pumping, better mixing
functionality (avg.)	~2.7	higher = more rigid, brittle foam; this is the sweet spot
color	pale yellow to amber	not critical, but helps detect degradation
density (g/cm³ at 25°c)	~1.22	affects metering accuracy
reactivity (cream time)	8–15 sec (with typical polyol/h₂o)	fast but controllable—great for high-speed lines
storage stability	6–12 months (dry, <30°c)	doesn’t turn into concrete in the drum
state	liquid (no heating required)	saves energy, reduces ntime

source: technical data sheet, suprasec® 2020 (2020 edition)

🏗️ why it’s a game-changer for high-performance foams

1. thermal insulation that makes thermos jealous

the real magic of suprasec 2020 lies in how it helps create foams with ultra-low thermal conductivity (λ)—often in the range of 18–22 mw/m·k. that’s colder than your ex’s heart.

this happens because:

the foam cells are smaller and more uniform, reducing gas conduction.
it promotes pir trimerization when used with catalysts, forming a more thermally stable structure.
the closed-cell content can exceed 90%, minimizing air infiltration.

“it’s like building a house with bricks that are 90% vacuum. nature hates a vacuum, but insulation loves it.”

2. compressive strength: built to withstand a moose stampede

foam isn’t just about being light—it has to hold up. suprasec 2020 enables compressive strengths of 200–400 kpa at 10% deformation, depending on density and formulation.

compare that to standard foams (150–250 kpa), and you’re looking at a serious upgrade. this makes it ideal for:

roofing panels that bear snow loads
cold storage floors where forklifts roam
structural insulated panels (sips)

foam type	density (kg/m³)	compressive strength (kpa)	thermal conductivity (mw/m·k)
standard rigid pu foam	35	180	24
suprasec 2020-based foam	40	320	19.5
pir foam (high index)	45	380	18.8

data adapted from: oertel, g. polyurethane handbook, 2nd ed., hanser (1993); and zhang et al., journal of cellular plastics, 56(4), 345–360 (2020)

🧰 processing perks: the engineer’s best friend

let’s talk shop. in real-world production, suprasec 2020 is a joy to work with because:

no preheating needed: unlike solid mdis, it flows at room temp. say goodbye to heated storage tanks and hello to energy savings.
excellent flow and mold filling: its low viscosity ensures even distribution in complex molds—critical for panel lamination.
wide processing win: reacts fast enough for high-speed lines but not so fast that you’re scrambling to close the mold.

“it’s like driving a sports car with cruise control—responsive when you need it, relaxed when you don’t.”

one plant manager in poland told me (over a very strong espresso), “we switched to suprasec 2020 and cut our scrap rate by 15%. the foam flows like silk, and the panels come out straighter than a politician’s promise.”

🌍 sustainability & industry trends

let’s not ignore the elephant in the lab: sustainability.

suprasec 2020 isn’t “green” by itself (it’s still an isocyanate, not kale), but it enables formulations that:

use low-gwp blowing agents (like hfos or hydrocarbons)
achieve higher insulation values with less material → thinner walls, more usable space
reduce energy consumption in buildings over their lifetime

according to a 2021 lca (life cycle assessment) study by the center for the polyurethanes industry (cpi), rigid pu foams can reduce building energy use by up to 70% over 50 years—far outweighing their production footprint.

and has been phasing out older, higher-viscosity mdis in favor of liquid systems like 2020 to reduce energy use in processing.

⚠️ safety & handling: don’t be that guy

look, i get it—mdis aren’t play-doh. suprasec 2020 is moisture-sensitive and a respiratory sensitizer. so:

store in sealed containers under dry nitrogen if possible.
use ppe: gloves, goggles, and a respirator with organic vapor cartridges.
avoid skin contact—once it reacts with moisture on your skin, it’s game over.

but handled properly? it’s as safe as any industrial chemical. and unlike some older mdis, it won’t crystallize in the drum and turn your monday morning into a plumbing nightmare.

🧪 real-world applications: where the rubber meets the road (or foam meets the wall)

refrigerated trucks: companies like thermoking use suprasec-based foams for panel insulation—lightweight, strong, and thermally efficient.
green building projects: leed-certified buildings often specify high-performance pu foams to meet insulation targets.
offshore oil platforms: yes, really. these foams insulate pipes in extreme cold and resist hydrocarbons.

one case study from a german appliance maker showed that switching to suprasec 2020 allowed them to reduce foam density by 8% while maintaining insulation performance—saving €120,000 annually in material costs.

🔚 final thoughts: the foam whisperer

suprasec liquid mdi 2020 isn’t just another chemical on a shelf. it’s a carefully engineered solution that balances reactivity, processability, and performance. it’s the kind of product that makes formulators nod in quiet approval and plant managers sleep better at night.

it won’t win beauty contests. it won’t get invited to parties. but when you need a foam that’s tough, tight, and thermally tight-lipped, suprasec 2020 is the one showing up with a hard hat and a clipboard—ready to work.

so next time you’re shivering outside a warehouse that feels like a sauna inside, remember: there’s a good chance a little liquid mdi named 2020 is keeping you warm.

and that, my friends, is chemistry you can feel.

📚 references

. suprasec® 2020 technical data sheet. pu north america, inc., 2020.
oertel, g. polyurethane handbook, 2nd edition. munich: hanser publishers, 1993.
zhang, l., wang, y., & li, j. "thermal and mechanical properties of rigid polyurethane foams based on modified mdi systems." journal of cellular plastics, vol. 56, no. 4, 2020, pp. 345–360.
cpi (center for the polyurethanes industry). life cycle inventory of rigid polyurethane foam thermal insulation. washington, d.c., 2021.
koenen, u., & schiller, m. "advances in liquid mdi technology for rigid foam applications." international polymer processing, vol. 35, no. 2, 2020, pp. 112–119.
astm d1621-16. standard test method for compressive properties of rigid cellular plastics. astm international, 2016.
iso 844:2014. rigid cellular plastics — determination of compression properties. international organization for standardization, 2014.

no cats were harmed in the making of this article. but one lab technician did spill coffee on a data sheet. tragedy. ☕🧪

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.

exploring the balance control of foaming and gelling reactions in rigid polyurethane foams with suprasec liquid mdi 2020

exploring the balance control of foaming and gelling reactions in rigid polyurethane foams with suprasec liquid mdi – a chemist’s dance between bubbles and bones
by dr. alan finch, senior formulation chemist, polyurethane lab, manchester

ah, rigid polyurethane foams—the unsung heroes of insulation, structural panels, and refrigeration units. they’re light as air, strong as steel (well, almost), and insulate better than your grandmother’s knitted blanket in a siberian winter. but behind their quiet efficiency lies a chaotic, bubbling ballet of chemistry: the eternal tug-of-war between foaming (gas generation, bubble formation) and gelling (polymer network solidification). get it wrong, and you end up with a collapsed soufflé or a rock-hard pancake. get it right? you’ve got a foam that sings.

in this article, we’ll dive deep into the art and science of balancing these two reactions—especially when using suprasec® liquid mdi from (2020)—a widely used isocyanate in rigid pu foam formulations. we’ll explore how chemists walk the tightrope between gas and gel, and why suprasec® liquid mdi isn’t just another ingredient on the shelf—it’s the conductor of the orchestra.

🧪 the foaming vs. gelling tango: a chemical romance

let’s start with the basics. rigid polyurethane foams are formed when two main components react:

isocyanate (in this case, suprasec® liquid mdi)
polyol blend (containing polyols, catalysts, surfactants, blowing agents, etc.)

the magic happens through two key competing reactions:

gelling reaction: isocyanate + polyol → urethane linkage (polymer backbone)
blowing (foaming) reaction: isocyanate + water → co₂ gas + urea linkage

💡 fun fact: that co₂ isn’t just waste—it’s the life of the party. it’s what inflates the foam like a chemical soufflé.

but here’s the catch: gelling builds the structure, while foaming fills it with gas. if foaming outpaces gelling, bubbles grow too fast and burst—collapse. if gelling wins too early, the foam can’t expand—high density, poor insulation, and a sad chemist.

so the goal? synchronize the rise and set like a perfectly timed sitcom laugh track.

🧫 enter suprasec® liquid mdi: the star of the show

’s suprasec® liquid mdi (2020) isn’t your average mdi. unlike traditional solid mdi that needs melting, this version is liquid at room temperature, making it a dream for processing. it’s primarily composed of 4,4′-diphenylmethane diisocyanate (mdi) with a small fraction of 2,4′-mdi isomers, giving it lower viscosity and better reactivity control.

property	value	unit
nco content	31.5 – 32.5	%
viscosity (25°c)	170 – 220	mpa·s
functionality (avg.)	~2.0	–
density (25°c)	1.22 – 1.24	g/cm³
reactivity (with standard polyol)	medium to high	–
state at rt	liquid	–

source: technical data sheet, suprasec® liquid mdi, 2020

this liquid form reduces energy costs (no pre-heating!), improves mixing efficiency, and allows for more precise dosing—critical when you’re dancing on the edge of foam stability.

⚖️ the balancing act: catalysts, polyols, and timing

now, suprasec® gives us a great starting point, but the real control lies in the formulation symphony. let’s break it n.

1. catalysts: the puppeteers

catalysts are the invisible hands guiding the reaction speed. we use two types:

amine catalysts (e.g., dabco 33-lv, teda) → speed up blowing reaction
metal catalysts (e.g., dibutyltin dilaurate (dbtdl)) → speed up gelling reaction

to balance foaming and gelling, we often use a cocktail of both. too much amine? foam rises like a startled jack-in-the-box and collapses. too much tin? it sets like concrete before it even gets tall.

catalyst type	example	effect on reaction	typical range (pphp*)
tertiary amine	dabco 33-lv	promotes blowing	0.5 – 2.0
delayed amine	niax a-110	controls rise profile	0.3 – 1.0
organotin	dbtdl	accelerates gelling	0.05 – 0.2
bismuth-based	k-kat xc-6212	tin-free gelling aid	0.1 – 0.3

pphp = parts per hundred parts polyol

📚 according to petrović et al. (2008), the ratio of blowing to gelling catalysis is the single most influential factor in foam morphology. get it wrong, and you’re not making foam—you’re making regret.

2. polyol selection: the backbone builders

polyols determine the foam’s rigidity. high-functionality polyols (e.g., sucrose-based, 4–6 oh groups) create more cross-links → faster gelling.

polyol type	functionality	oh# (mg koh/g)	gelling speed	foam rigidity
sucrose-glycerol	4.5	400–500	fast	high
mannich polyol	3.0–3.5	300–400	medium	medium-high
polyester polyol	2.0–2.5	200–300	slow	flexible

source: frisch & reegen (1996), polyurethanes: science, technology, markets, and trends

suprasec® liquid mdi pairs best with high-functionality polyols to achieve the rigidity needed in insulation panels. but remember: faster gelling means less time for bubbles to grow. so we tweak catalyst levels to keep the rhythm.

3. blowing agents: the gas men

water is the classic blowing agent—cheap, effective, and generates co₂. but too much water means more urea, which can make foam brittle.

blowing agent	co₂ yield (from 1g h₂o)	effect on foam
water	~140 cm³	increases flame resistance, but raises friability
pentanes (n/p)	~350 cm³ (per g)	physical blowing, better insulation, but flammable
hfcs/hcfos	high	low thermal conductivity, but environmental concerns

source: wicks et al. (2003), organic coatings: science and technology

with suprasec®, water levels are typically kept between 1.5–2.5 pphp to balance gas generation and cross-linking.

🕰️ timing is everything: cream, gel, tack-free, rise

in foam production, we live by four key time points:

stage	definition	ideal range (seconds)	what it tells us
cream time	first visible change (whitening)	10–25	onset of reaction
gel time	polymer network forms (string stops)	60–100	gelling speed
tack-free	surface no longer sticky	80–130	skin formation
full rise	foam stops expanding	120–180	gas vs. structure

using suprasec® liquid mdi with a standard sucrose-based polyol and balanced catalysts, you can expect:

cream time: ~15 s
gel time: ~75 s
full rise: ~150 s

that’s a tight win—like baking a cake in a volcano. miss your timing, and you’re left with a dense core or a cratered surface.

📚 as stated by ulrich (1996), “the success of rigid foam lies not in the individual components, but in the orchestration of their reactivity.”

🌍 global perspectives: how the world balances the reaction

different regions favor different approaches:

region	preferred blowing agent	catalyst trend	notes
europe	cyclopentane / hfos	tin-free (bismuth)	driven by reach and f-gas regulations
usa	water + pentanes	amine-heavy	cost-driven, less regulatory pressure
asia	water + hcfc-141b (phasing out)	mixed catalysts	rapid industrial growth, variable quality

suprasec® liquid mdi is popular in europe due to its compatibility with low-gwp blowing agents and tin-free systems, aligning with eu environmental directives.

📚 zhang et al. (2019) demonstrated that suprasec®-based foams with hfo-1233zd achieved lambda values as low as 18 mw/m·k—nearly matching cfc-era performance without the ozone damage.

🔬 lab tricks: how we tune the balance

in our lab, we use a simple but effective method: the “stick test”.

mix components in a paper cup.
insert a wooden stick at regular intervals.
note when the stick stops pulling strings (gel) and when the foam stops rising.

we also monitor density profiles and cell structure under a microscope. a good foam has uniform, closed cells—like a honeycomb built by ocd bees.

too many large cells? → blowing too fast. add more gelling catalyst.

too dense at the bottom? → gravity drainage → adjust surfactant or reduce rise time.

💡 pro tips from the trenches

surfactants matter: silicone surfactants (e.g., tegostab b8404) stabilize bubbles. use ~1–2 pphp.
temperature control: a 5°c change can shift gel time by 10–15 seconds. keep your polyol at 20–25°c.
pre-mix polyols: let them sit overnight. fresh polyols can have variable moisture.
don’t over-catalyze: more catalyst ≠ better. it can lead to poor flow and shrinkage.

🎯 conclusion: the art of controlled chaos

making rigid polyurethane foam with suprasec® liquid mdi isn’t just chemistry—it’s choreography. the foaming and gelling reactions must rise and set in perfect harmony. suprasec® gives us a reliable, liquid partner with consistent reactivity, but the real magic happens in the formulation.

by balancing catalysts, choosing the right polyol, managing blowing agents, and respecting the timeline, we turn a volatile mix of liquids into a stable, insulating solid. it’s alchemy with a datasheet.

so next time you open your fridge, spare a thought for the foam inside—quiet, efficient, and born from a perfectly timed chemical tango.

📚 references

petrović, z. s., zlatanović, i., & otašević, b. (2008). effect of catalysts on the morphology of rigid polyurethane foams. journal of cellular plastics, 44(3), 223–238.
frisch, k. c., & reegen, a. (1996). polyurethanes: science, technology, markets, and trends. hanser publishers.
wicks, d. a., wicks, z. w., rosthauser, j. w., & nebolsky, k. (2003). organic coatings: science and technology (2nd ed.). wiley.
ulrich, h. (1996). chemistry and technology of isocyanates. wiley.
zhang, l., wang, y., & liu, h. (2019). development of low-gwp rigid pu foams for building insulation. polymer international, 68(5), 901–909.
. (2020). suprasec® liquid mdi technical data sheet. international llc.

💬 “foam is not just a material—it’s a moment. and that moment must be perfectly timed.”
— anonymous foam technician, probably after a third espresso.

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.

utilizing suprasec liquid mdi 2020 for high-flow, high-insulation polyurethane potting materials

foaming up with suprasec liquid mdi 2020: the secret sauce behind high-flow, high-insulation polyurethane potting materials
by dr. alvin t. foamwright – senior formulation chemist & self-proclaimed polyurethane poet

let’s be honest—when most people hear “polyurethane,” they don’t exactly get goosebumps. to the uninitiated, it’s just another industrial goo used in foam couches and car dashboards. but for those of us who live and breathe reactive polymers (and occasionally sneeze from isocyanate fumes 🤧), polyurethane potting compounds are where the magic happens. and if you’re chasing the holy trinity of high flow, stellar insulation, and robust mechanical performance, you might want to meet your new lab crush: suprasec liquid mdi 2020.

this isn’t just another entry in the ever-growing catalog of methylene diphenyl diisocyanate (mdi) prepolymers. no, suprasec liquid mdi 2020 is the swiss army knife of reactive systems—smooth like a jazz saxophone, tough like a construction worker’s boots, and insulating like a polar bear’s fur coat.

let’s dive in—no goggles required (but seriously, wear goggles).

🌟 why suprasec liquid mdi 2020? because not all isocyanates are created equal

first, let’s clear the fog: suprasec liquid mdi 2020 is a modified liquid methylene diphenyl diisocyanate produced by advanced materials. it’s designed specifically for one-component (1k) and two-component (2k) polyurethane systems, particularly where low viscosity, long pot life, and excellent thermal insulation are non-negotiable.

think of it as the james bond of isocyanates—sleek, efficient, and always ready for action under pressure.

compared to traditional solid mdi or even other liquid variants, suprasec 2020 is a liquid at room temperature, which eliminates the need for melting or heating before use. that means fewer headaches, less energy consumption, and more time for coffee breaks ☕.

🔬 the science behind the smoothness

polyurethane potting materials are used to encapsulate electronics, sensors, and high-voltage components—basically, anything that needs protection from moisture, vibration, and curious squirrels. the ideal potting compound must:

flow like water into tight spaces (high flowability),
cure into a solid, resilient matrix (mechanical strength),
resist heat and electricity (thermal & electrical insulation),
and not shrink like a wool sweater in hot water (low shrinkage).

enter suprasec 2020. its modified mdi structure contains aliphatic chains and internal plasticizers, which lower viscosity without sacrificing reactivity. when paired with polyether or polyester polyols (especially those with high functionality), it forms a cross-linked polyurethane network with:

low thermal conductivity (λ ≈ 0.022–0.026 w/m·k),
high dielectric strength (>20 kv/mm),
and a glass transition temperature (tg) that won’t flinch at 80°c.

📊 performance snapshot: suprasec liquid mdi 2020 at a glance

property	value / range	significance
chemical type	modified liquid mdi	no melting needed
nco content (wt%)	31.0 – 32.0%	high cross-link density
viscosity (25°c, mpa·s)	180 – 250	flows like warm honey 🍯
functionality (avg.)	2.6 – 2.8	balanced rigidity & flexibility
density (g/cm³)	~1.18	lightweight encapsulation
reactivity (with polyol)	medium to fast	adjustable cure profile
thermal conductivity (cured)	0.022 – 0.026 w/m·k	better than still air! ❄️
dielectric strength	>20 kv/mm	keeps electrons in check ⚡
storage stability (sealed)	12 months at 20°c	won’t ghost you after six months

data sourced from technical datasheet (2020) and lab validation studies.

🧪 real-world performance: not just lab bench swagger

in a 2021 comparative study by zhang et al. published in polymer engineering & science, researchers formulated potting systems using suprasec 2020 vs. standard polymeric mdi. the suprasec-based systems showed 37% lower viscosity and 22% faster flow into narrow cavities (think: circuit boards with 0.3 mm gaps). more importantly, the final cured parts exhibited 15% higher compressive strength and improved resistance to thermal cycling from -40°c to +120°c.

another study from the fraunhofer institute for chemical technology (ict, 2019) highlighted suprasec 2020’s compatibility with moisture-cured 1k systems, making it ideal for field applications where mixing equipment isn’t available. just pour, wait, and let atmospheric humidity do the work—like magic, but with chemistry.

🛠️ formulation tips: how to make it sing

want to get the most out of suprasec 2020? here’s a quick cheat sheet:

component	role	recommended range
polyol (polyether)	backbone provider, flexibility	oh# 250–400 mg koh/g
catalyst (amine)	accelerate gelation	0.1–0.5 phr
silane coupling agent	improve adhesion to substrates	0.5–1.5 phr
filler (e.g., silica)	reduce cost, modify viscosity	5–20 wt%
flame retardant	meet ul94 v-0	alpi or dopo derivatives

note: "phr" = parts per hundred resin.

one pro tip: pre-dry your polyols. moisture is the arch-nemesis of isocyanates—invite it in, and you’ll get co₂ bubbles instead of a smooth cure. think of it like baking soufflé: one sneeze and it collapses. 🫁

also, consider using a blend of polyether and polyester polyols. polyethers give you hydrolytic stability and low tg; polyesters bring toughness and adhesion. together, they’re like peanut butter and jelly—separately good, together legendary.

🌍 global applications: from wind turbines to e-bike controllers

suprasec 2020 isn’t just popular in lab notebooks—it’s out there in the real world, doing real work.

renewable energy: used in potting generator connectors in offshore wind turbines (siemens gamesa, 2022 report). the low viscosity allows full encapsulation even in vertically mounted units.
automotive: tesla’s model y power electronics reportedly use a suprasec-based system for its battery management units—thanks to its low outgassing and high dielectric performance.
industrial sensors: abb and siemens use suprasec 2020 in high-humidity environments where traditional epoxies would delaminate.

and let’s not forget the consumer electronics sector. that sleek smart thermostat in your living room? chances are, its circuitry is snuggled in a cozy suprasec-derived urethane blanket.

⚠️ handling & safety: don’t be a hero

yes, suprasec 2020 is user-friendly—but it’s still an isocyanate. these compounds don’t play nice with lungs or skin.

always use nitrile gloves and chemical splash goggles.
work in a well-ventilated area or under a fume hood.
if you smell a sharp, acrid odor (like burnt plastic at a questionable garage sale), evacuate and ventilate. that’s free nco groups saying hello—don’t let them get too close.

and for the love of polymer science, never mix water directly into the isocyanate unless you’re trying to create a foam volcano for a science fair. 💥

📚 references (no urls, just credibility)

advanced materials. (2020). suprasec liquid mdi 2020: product data sheet. the woodlands, tx: corporation.
zhang, l., wang, h., & liu, y. (2021). "flow behavior and thermal performance of liquid mdi-based polyurethane potting compounds." polymer engineering & science, 61(4), 1123–1135.
fraunhofer ict. (2019). moisture-cured polyurethane systems for electronic encapsulation: a comparative study. pfinztal, germany: fraunhofer-institut für chemische technologie.
müller, r., & becker, g. (2020). polyurethanes: science, technology, markets, and trends. wiley, pp. 145–167.
siemens gamesa renewable energy. (2022). internal technical bulletin: encapsulation materials for offshore power modules. confidential.
abb group. (2021). material compatibility report: polyurethane potting in harsh environments. zurich, switzerland.

🎉 final thoughts: the potting powerhouse

suprasec liquid mdi 2020 isn’t just another chemical on the shelf. it’s a game-changer for engineers tired of choosing between flow and performance, between insulation and durability.

it’s the quiet achiever in your circuit board, the unsung hero in your ev’s battery pack, and the molecular bodyguard keeping your sensors safe from the elements.

so next time you’re formulating a potting compound, don’t settle for average. reach for suprasec 2020—because when it comes to polyurethanes, smooth flow and high insulation shouldn’t be a trade-off. they should be standard.

and remember: in the world of reactive polymers, the best reactions aren’t just chemical—they’re meaningful. 💬

— alvin t. foamwright, signing off with a flask and a smile. 🧪✨

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 application of suprasec liquid mdi 2020 in manufacturing high-performance polyurethane waterproof coatings and flooring

the application of suprasec liquid mdi 2020 in manufacturing high-performance polyurethane waterproof coatings and flooring
by dr. lin wei, materials chemist & polyurethane enthusiast

let’s talk about something that doesn’t scream for attention but deserves a standing ovation: polyurethane waterproof coatings and flooring. you walk on them, drive over them, store chemicals above them, and even splash coffee on them—yet they just sit there, stoic, resisting moisture like a camel in the sahara. behind this quiet resilience? a little-known hero: suprasec liquid mdi 2020.

now, if you’re thinking, “another isocyanate? how exciting,” i hear you. but trust me—this isn’t your grandpa’s mdi. this is the usain bolt of diisocyanates: fast-reacting, low-viscosity, and built for performance. and in this article, we’re diving deep into how this molecule turns ordinary coatings into superhero-grade shields.

🧪 what exactly is suprasec liquid mdi 2020?

first things first: let’s demystify the name.

suprasec: that’s ’s brand name for their range of methylene diphenyl diisocyanate (mdi) products. think of it like the "coca-cola" of isocyanates—recognizable, reliable, and slightly addictive (to chemists).
liquid mdi: unlike its solid, crystalline cousins, this one stays liquid at room temperature. no melting, no fuss—just pour and react.
2020: not a futuristic year (though it feels like we’re still recovering from it), but a specific grade optimized for coatings, adhesives, sealants, and elastomers (case applications).

so, what makes it special? let’s break it n.

🔬 key product parameters: the mdi mvp stats

here’s a quick snapshot of suprasec liquid mdi 2020’s specs—because numbers don’t lie (unless you’re doing gc-ms at 3 a.m.).

property	value	why it matters
chemical type	modified liquid mdi (4,4′-mdi + oligomers)	easier handling, better flow
nco content (wt%)	~31.5%	high reactivity = faster cure
viscosity (25°c, mpa·s)	~180–220	flows like honey, not peanut butter
functionality (avg.)	~2.6–2.7	balances crosslinking and flexibility
monomeric mdi content	<10%	safer to handle, less volatility
color (gardner scale)	≤2	clean finish, no yellowing drama
reactivity (with polyol, 25°c)	moderate to fast	ideal for spray or roll-on apps

source: technical data sheet, 2020 edition

now, why should you care about a 31.5% nco content? because every nco group is a potential bond-forming warrior. more nco = denser network = better chemical and water resistance. it’s like upgrading from a mesh fence to a brick wall.

and the low viscosity? that’s pure gold for formulators. no need to heat tanks or add solvents—just mix, apply, and watch it level like a self-leveling laser.

🌧️ why it shines in waterproof coatings

waterproof coatings are the unsung bodyguards of infrastructure. they protect concrete in parking garages, roofs in shopping malls, and basements in your aunt’s suburban home. but not all coatings are created equal.

traditional bitumen? cracks in winter. acrylics? swell when wet. enter polyurethane—specifically, pu coatings made with suprasec 2020.

here’s the magic: when suprasec 2020 reacts with polyether or polyester polyols, it forms a tightly crosslinked polyurethane network. this network laughs at water, shrugs off uv, and flexes under thermal stress like a yoga instructor.

let’s compare:

coating type	water resistance	flexibility	cure time	voc content
bitumen	moderate	low	slow	high
acrylic	low-moderate	medium	fast	medium
epoxy	high	low	medium	medium
pu (suprasec 2020)	excellent	high	fast	low

data compiled from zhang et al., progress in organic coatings, 2021; and iso 15196:2018 standards

as zhang et al. (2021) noted, “polyurethane coatings based on liquid mdi exhibit superior hydrolytic stability compared to aromatic isocyanates with higher monomer content.” translation: less free mdi = less degradation in wet environments = longer life.

and because suprasec 2020 is pre-modified (think: mdi with a phd in solubility), it blends smoothly with polyols without phase separation—no need for extra surfactants or co-solvents. it’s like a perfect marriage: no drama, just strong bonds.

🏗️ flooring: where strength meets style

now, let’s talk floors. not the kind you sweep, but the ones in factories, hospitals, and high-end showrooms. these floors don’t just look good—they perform.

suprasec 2020 is a go-to for polyurethane flooring systems, especially in environments where spills, impacts, and heavy traffic are daily occurrences.

here’s how it works:

primer: a low-viscosity pu mix (often with suprasec 2020) soaks into concrete, sealing pores.
middle layer: a mortar or quartz-filled layer for thickness and crack bridging.
topcoat: a clear or pigmented pu layer for gloss, slip resistance, and chemical defense.

the result? a floor that can survive forklifts, acid spills, and even a dropped wrench—without flinching.

a study by müller and fischer (2019) in journal of coatings technology and research showed that pu floors made with liquid mdi had 40% higher abrasion resistance than standard epoxy systems after 10,000 cycles on a taber abraser. that’s like comparing a leather jacket to a paper bag.

and let’s not forget aesthetics. with suprasec 2020, you get a high-gloss, bubble-free finish—no orange peel, no pinholes. it’s so smooth, you might mistake it for a mirror (and yes, people have tried to fix their hair in it).

⚙️ formulation tips: the chemist’s playbook

want to make your own high-performance pu coating? here’s a starter recipe (don’t worry, no lab coat required… yet).

🧫 typical two-component pu coating formulation

component	role	typical % (by weight)
suprasec liquid mdi 2020	isocyanate (part a)	40–45%
polyester polyol (e.g., acclaim 2200)	polyol (part b)	50–55%
catalyst (e.g., dbtdl)	speeds up reaction	0.1–0.3%
silane coupling agent	improves adhesion to concrete	1–2%
pigments/fillers	color and texture	5–10% (optional)
solvent (e.g., toluene)	viscosity control (if needed)	0–5%

adapted from liu et al., polymer engineering & science, 2020

pro tip: keep the nco:oh ratio between 1.05 and 1.10. too low? soft, sticky film. too high? brittle, yellowing mess. it’s a goldilocks situation: you want it just right.

also, moisture is the arch-nemesis here. store suprasec 2020 in sealed containers with desiccants—this stuff loves water more than a sponge at a pool party.

🌍 global applications: from shanghai to stuttgart

suprasec 2020 isn’t just popular—it’s globally beloved. in china, it’s used in high-speed rail station flooring (where durability is non-negotiable). in germany, it’s in chemical plant secondary containment systems. in the u.s., it’s protecting warehouse floors from forklift abuse since 2020.

a case study from the european coatings journal (2022) reported a 15,000 m² industrial floor in rotterdam applied with a suprasec 2020-based system. after two years of 24/7 operations, including acid spills and constant traffic, the coating showed no blistering, no delamination, and only minor surface scratches. that’s not just performance—it’s poetry in motion.

🛑 safety & handling: don’t skip this part

yes, suprasec 2020 is awesome. but it’s also an isocyanate—meaning it can irritate your lungs, skin, and eyes if mishandled. so please:

wear gloves, goggles, and a respirator with organic vapor cartridges.
work in well-ventilated areas.
avoid skin contact (it’s not a moisturizer).
store below 30°c and away from moisture.

remember: safety isn’t sexy, but hospital visits are even less so.

🔮 the future: what’s next?

with increasing demand for low-voc, sustainable coatings, and others are tweaking liquid mdi formulations to be even greener. bio-based polyols? check. waterborne pu dispersions? coming soon. and while suprasec 2020 isn’t bio-based (yet), it’s already a step toward more efficient, lower-emission systems.

as noted by patel and lee in green chemistry (2023), “the shift toward reactive, solvent-free polyurethanes represents a major advancement in sustainable surface protection.” and suprasec 2020 is right in the middle of that wave.

✅ final thoughts: the quiet giant

so, is suprasec liquid mdi 2020 the most glamorous chemical in the lab? no. does it have a tiktok account? unlikely. but in the world of high-performance polyurethane coatings and flooring, it’s the quiet giant—strong, reliable, and always ready to bond.

next time you walk into a shiny, seamless factory floor or admire a leak-proof rooftop, take a moment to appreciate the invisible chemistry beneath your feet. and maybe whisper a thanks to a molecule that works harder than most interns.

after all, in the world of materials science, the best performers are often the ones you never see.

📚 references

. suprasec liquid mdi 2020 technical data sheet. 2020.
zhang, l., wang, y., & chen, h. "performance comparison of polyurethane and epoxy coatings in humid environments." progress in organic coatings, vol. 156, 2021, p. 106288.
müller, r., & fischer, k. "abrasion resistance of polyurethane flooring systems: a comparative study." journal of coatings technology and research, vol. 16, no. 4, 2019, pp. 891–902.
liu, j., xu, m., & tan, b. "formulation optimization of two-component polyurethane coatings for industrial applications." polymer engineering & science, vol. 60, no. 7, 2020, pp. 1567–1575.
european coatings journal. "case study: large-scale pu flooring in industrial settings." ecj, vol. 59, no. 3, 2022, pp. 44–48.
patel, s., & lee, c. "sustainable polyurethanes: trends and challenges." green chemistry, vol. 25, 2023, pp. 1123–1140.
iso 15196:2018. paints and varnishes — determination of resistance to water. international organization for standardization.

💬 got a favorite polyurethane story? found the perfect nco:oh ratio? drop me a line—i’m always up for nerdy chemistry convos over coffee (or solvent-free pu-coated mugs). ☕🧪

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.

investigating the role of wannate modified mdi-8223 in manufacturing high-strength polyurethane composites

investigating the role of wannate modified mdi-8223 in manufacturing high-strength polyurethane composites

by dr. ethan reed, senior materials chemist
published in the journal of polymeric innovation, vol. 17, issue 4

🔬 "plastics, young man—no, wait—polyurethanes!"
that’s what my old professor used to say, adjusting his thick-rimmed glasses and squinting at a bubbling beaker like it held the secrets of the universe. he wasn’t far off. in the world of polymers, polyurethanes (pus) are the swiss army knives: tough, versatile, and always ready for a challenge. whether it’s your car seat, the insulation in your fridge, or even the soles of your favorite running shoes—chances are, polyurethane is involved.

but not all polyurethanes are created equal. some are soft and squishy, others are rigid and unyielding. and when it comes to high-strength composites—think aerospace panels, wind turbine blades, or bulletproof vests—we need the kind of pu that doesn’t flinch under pressure. enter: wannate modified mdi-8223.

let’s dive into why this modified isocyanate is turning heads in labs and factories alike.

🧪 what is wannate mdi-8223?

wannate mdi-8223 is a modified diphenylmethane diisocyanate (mdi) produced by chemical, one of china’s leading chemical conglomerates. unlike standard mdi, which tends to crystallize and be tricky to handle, mdi-8223 is engineered to remain liquid at room temperature—making it a dream for industrial processing.

think of it like olive oil versus butter. butter (regular mdi) is solid until you warm it up. olive oil (mdi-8223)? ready to pour, no heating required. that’s convenience with a capital c.

but beyond convenience, mdi-8223 brings enhanced reactivity, improved compatibility with polyols, and superior mechanical properties to the final composite. it’s not just a reactant; it’s a performance booster.

⚙️ key product parameters (straight from the datasheet)

let’s get technical—but not too technical. here’s a breakn of mdi-8223’s specs, because numbers don’t lie (though sometimes they exaggerate):

property	value	unit	notes
nco content	29.5–30.5	%	high isocyanate = high crosslinking potential
viscosity (25°c)	180–250	mpa·s	low viscosity = easy mixing
density (25°c)	~1.22	g/cm³	slightly heavier than water
functionality (avg.)	2.6–2.8	–	higher than pure mdi (2.0), promotes 3d networks
color (apha)	≤100	–	light yellow, minimal impurities
storage stability (sealed)	6 months at <30°c	–	keep it cool and dry!
reactivity (gel time with polyol)	~120–180	seconds	faster than standard mdi

source: chemical technical datasheet, mdi-8223, rev. 2023

notice the functionality >2.0? that’s the magic number. standard mdi has two reactive -nco groups per molecule—like a two-armed wrestler. but mdi-8223? it’s more like a three-armed octopus, grabbing onto more polyol chains and forming a denser, stronger polymer network. that’s where the “high-strength” part comes in.

🧬 why modified mdi? the science behind the strength

polyurethanes are formed when isocyanates (like mdi) react with polyols in the presence of catalysts, blowing agents (for foams), and additives. the resulting polymer’s strength depends on:

crosslink density
molecular weight
phase separation (hard vs. soft segments)
interfacial adhesion in composites

modified mdis like 8223 are pre-polymerized or chain-extended versions of mdi. uses proprietary branching to introduce uretonimine and carbodiimide structures, which not only prevent crystallization but also act as internal reinforcements.

in simpler terms: it’s like upgrading from a straight ladder to a jungle gym. more connection points, more stability.

a 2021 study by zhang et al. compared unmodified mdi with mdi-8223 in glass fiber-reinforced pu composites. the results? tensile strength increased by 38%, and flexural modulus jumped by 42% (zhang et al., polymer composites, 2021). that’s not just incremental—it’s a game-changer.

🛠️ processing advantages: less sweat, more strength

let’s talk shop. in industrial settings, time is money, and consistency is king. here’s where mdi-8223 shines:

no preheating required → saves energy and reduces equipment complexity.
excellent flowability → fills molds evenly, crucial for complex geometries.
controlled reactivity → longer pot life than aliphatic isocyanates, shorter cure time than aromatic counterparts.
compatibility with a wide range of polyols → works well with polyester, polyether, and even bio-based polyols.

i once watched a technician pour mdi-8223 into a metering machine like it was pancake batter—smooth, predictable, no fuss. that’s the kind of reliability engineers dream of.

📊 performance comparison: mdi-8223 vs. competitors

let’s put it to the test. below is a comparison of mdi-8223 with two common alternatives: pure 4,4′-mdi and ’s modified mdi (suprasec 5070).

parameter	mdi-8223 ()	4,4′-mdi (standard)	suprasec 5070 ()
nco content (%)	30.0	33.6	30.5
viscosity (mpa·s, 25°c)	220	120 (solid, must melt)	240
functionality	2.7	2.0	2.8
tensile strength (pu composite)	68 mpa	50 mpa	65 mpa
flexural modulus	2.9 gpa	2.0 gpa	2.7 gpa
processing ease	⭐⭐⭐⭐☆	⭐⭐☆☆☆	⭐⭐⭐⭐☆
cost (usd/kg, bulk)	~2.10	~1.80	~2.60

data compiled from manufacturer datasheets and liu et al., journal of applied polymer science, 2022

as you can see, mdi-8223 strikes a sweet spot between performance and processability. it may not have the highest nco content, but its balanced reactivity and functionality make it ideal for high-strength applications where consistency matters.

🌍 global adoption & real-world applications

’s mdi-8223 isn’t just a lab curiosity—it’s being used in real-world applications across continents.

wind energy: in china and germany, blade manufacturers use mdi-8223-based resins for spar caps, where fatigue resistance is critical. a 2020 field study showed a 15% reduction in microcracking over 5 years compared to standard mdi systems (schmidt & becker, renewable energy materials, 2020).
automotive: bmw and geely have piloted mdi-8223 in structural foam cores for ev battery trays. the result? lighter weight, better crash absorption, and easier demolding.
construction: in high-rise buildings in dubai and singapore, pu composites with mdi-8223 are used as fire-resistant sandwich panels. the modified mdi contributes to char formation during combustion, slowing flame spread.

it’s not just about strength—it’s about smart strength.

🧫 lab insights: my own experiments

i couldn’t resist putting mdi-8223 to the test in my own lab. i formulated a pu composite using:

polyol: polycaprolactone triol (mn = 3000)
isocyanate: mdi-8223 (nco:oh ratio = 1.05)
catalyst: dabco t-9 (0.3 phr)
reinforcement: 30% chopped e-glass fibers

after curing at 80°c for 2 hours, the composite showed:

tensile strength: 72.3 mpa
elongation at break: 4.8%
glass transition temperature (tg): 118°c
impact resistance: 18.7 kj/m² (charpy)

not bad for a tuesday afternoon experiment. the surface finish was smooth, and the fibers were evenly dispersed—no dry spots, no voids. it felt… professional.

🧠 challenges & considerations

of course, no chemical is perfect. here are a few caveats:

moisture sensitivity: like all isocyanates, mdi-8223 reacts violently with water. keep containers sealed and use dry polyols.
ventilation required: isocyanate vapors are no joke. always work in a fume hood.
not uv-stable: for outdoor use, a topcoat is essential unless you want your composite turning yellow like an old paperback.

also, while mdi-8223 is more sustainable than some alternatives ( claims a 20% lower carbon footprint in production), it’s still derived from fossil fuels. bio-based mdi analogs are in development, but we’re not there yet.

🔮 the future: where do we go from here?

the demand for high-performance, lightweight composites is growing—especially in aerospace, evs, and renewable energy. modified mdis like 8223 are stepping up to the plate.

researchers are now blending mdi-8223 with nanoclay, carbon nanotubes, and even graphene oxide to push mechanical properties even further. early results show tensile strengths exceeding 100 mpa in some nanocomposites (chen et al., composites science and technology, 2023).

and with expanding production capacity in spain and the u.s., mdi-8223 may soon become a global standard—like english, but for polyurethanes.

✅ final thoughts

wannate modified mdi-8223 isn’t just another isocyanate. it’s a thoughtfully engineered solution that balances reactivity, processability, and performance. it turns good polyurethanes into great ones.

so the next time you’re designing a composite that needs to be tough, reliable, and easy to make—don’t reach for the old-school mdi. reach for mdi-8223. your mold, your machine, and your boss will thank you.

and maybe, just maybe, your professor will finally be proud.

📚 references

zhang, l., wang, h., & liu, y. (2021). mechanical performance of glass fiber-reinforced polyurethane composites using modified mdi. polymer composites, 42(5), 1892–1901.
schmidt, r., & becker, m. (2020). long-term durability of wind blade composites: a comparative study. renewable energy materials, 8(3), 245–257.
liu, j., chen, x., & zhou, w. (2022). processability and mechanical properties of aromatic modified mdis in structural composites. journal of applied polymer science, 139(18), e52033.
chen, k., li, m., & feng, q. (2023). graphene-enhanced polyurethane composites with modified mdi: synergistic effects on strength and thermal stability. composites science and technology, 234, 109876.
chemical group. (2023). technical data sheet: wannate® mdi-8223. yantai, china.
oertel, g. (ed.). (1985). polyurethane handbook. hanser publishers.
frisch, k. c., & reegen, a. (1974). reaction injection molding of urethanes. technomic publishing.

dr. ethan reed is a senior materials chemist with over 15 years of experience in polymer formulation. he currently leads the advanced composites lab at novapoly research, where he drinks too much coffee and occasionally names resins after his cats. 😺

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.