PU Technology – Page 219

wannate® cd mdi-100l: a versatile isocyanate for a wide range of industrial polyurethane applications

wannate® cd mdi-100l: the swiss army knife of isocyanates in the polyurethane world 🧪

let’s talk chemistry—specifically, the kind that sticks, seals, cushions, and insulates your life without you even noticing. polyurethanes, those unsung heroes of modern industry, are everywhere: from the soles of your running shoes to the insulation in your fridge, from car dashboards to the adhesive holding your smartphone together. and behind many of these applications? a little molecule with a big personality: wannate® cd mdi-100l.

now, i know what you’re thinking: “another isocyanate? really?” but hold on—this isn’t just any isocyanate. think of wannate® cd mdi-100l as the james bond of chemical building blocks: sleek, efficient, and ready for any mission. whether it’s bonding, foaming, or forming elastomers, this compound doesn’t just show up—it brings the whole toolkit.

so, what exactly is wannate® cd mdi-100l?

it’s a modified diphenylmethane diisocyanate (mdi), a variant of the classic mdi family, but with a twist—literally. unlike pure 4,4’-mdi, which is like a straight-laced lab technician, wannate® cd mdi-100l is more of a social butterfly: it contains a blend of isomers and oligomers that make it more reactive, more flexible, and better suited for a wider range of processing conditions. it’s the kind of compound that plays well with others—especially polyols.

🔧 why the “cd”? (spoiler: it stands for “cold-curing”)

the “cd” in wannate® cd mdi-100l isn’t a typo or a throwback to 90s music. it stands for “cold-curing,” which means this isocyanate can react at lower temperatures—ideal for energy-saving processes or heat-sensitive substrates. no need to crank up the oven; this guy gets the job done even when it’s chilly. 🌡️❄️

that’s a big deal in industrial settings where energy costs are climbing faster than a lab monkey on a caffeine drip. according to a 2021 study by zhang et al., cold-curing systems using modified mdis like wannate® cd mdi-100l can reduce energy consumption by up to 30% in adhesive applications without sacrificing bond strength (zhang et al., journal of applied polymer science, 2021).

🎯 key applications: where this molecule shines

let’s break it n—because no one wants a wall of text that looks like a chemical equation gone wrong.

application	why wannate® cd mdi-100l?	industry use case
adhesives & sealants	fast cure at room temp, excellent adhesion to metals, plastics, and wood	automotive assembly, flooring installation
rigid foams	high functionality → better crosslinking → improved insulation	refrigeration, construction panels
elastomers	balanced reactivity and flexibility	conveyor belts, rollers, industrial parts
coatings	tough, abrasion-resistant films	industrial flooring, protective linings
binders	strong bonding at low temps	foundry sand cores, wood composites

as you can see, this isn’t a one-trick pony. it’s more like a five-in-one multitool. whether you’re gluing a car door or insulating a warehouse, wannate® cd mdi-100l adapts like a chameleon at a paint store.

🧪 the nuts and bolts: product parameters

let’s get n to brass tacks—or, in this case, molecular weights and nco percentages. here’s the technical lown:

property	typical value	units
nco content	31.5–32.5	%
functionality	~2.7	—
viscosity (25°c)	180–220	mpa·s
density (25°c)	~1.22	g/cm³
average molecular weight	~360	g/mol
color (apha)	≤100	—
reactivity (gel time with dpg, 25°c)	180–240	seconds

source: chemical technical data sheet, 2023

now, why does this matter? let’s unpack it like a poorly packed suitcase.

nco content (~32%): this is the reactive part—the “business end” of the molecule. higher nco means faster reaction with polyols, but also more sensitivity to moisture. wannate® cd mdi-100l strikes a sweet spot: reactive enough to cure quickly, but stable enough to handle in industrial settings.
functionality (~2.7): this isn’t a simple di-isocyanate. it’s got a bit of oligomerization going on—meaning it can form more crosslinks, leading to tougher, more durable polymers. think of it as upgrading from a two-lane road to a multi-level interchange.
viscosity (180–220 mpa·s): that’s like honey on a warm day—flowable but not runny. perfect for spraying, casting, or metering in automated systems. no clogging, no drama.
low color (apha ≤100): important if you’re making light-colored coatings or adhesives. no one wants their pristine white countertop to turn yellow like an old paperback.

💡 a little chemistry humor (yes, that’s a thing)

why did the isocyanate go to therapy?

because it had deep nco issues.

(you’re welcome.)

🌍 global reach, local performance

wannate® cd mdi-100l is produced by chemical, one of the world’s leading mdi suppliers. but don’t let the chinese origin fool you—this product is built for global standards. in europe, it’s used in eco-friendly wood adhesives replacing formaldehyde-based resins (müller & richter, european coatings journal, 2020). in north america, it’s a go-to for cold-applied roofing sealants (smith et al., polyurethanes technology review, 2019). and in asia, it’s the backbone of high-speed shoe manufacturing lines where cure time is money—literally.

one standout feature? its compatibility with bio-based polyols. as sustainability becomes less of a buzzword and more of a business imperative, wannate® cd mdi-100l plays nice with renewable feedstocks. a 2022 study showed that formulations using 40% soy-based polyol with wannate® cd mdi-100l achieved mechanical properties within 5% of petroleum-based counterparts (lee & kim, green chemistry, 2022).

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

let’s be real—isocyanates aren’t exactly cuddly. wannate® cd mdi-100l is no exception. it’s moisture-sensitive (hello, co₂ bubbles and ruined batches), and inhalation of vapors can be a respiratory irritant. so, while it’s not something you’d want in your morning smoothie, proper handling makes it perfectly safe.

best practices:

store in sealed containers under dry nitrogen
use ppe: gloves, goggles, and ventilation
avoid contact with water (yes, even humidity counts)
process in controlled environments (think glove boxes or closed systems)

and for heaven’s sake, don’t leave the lid off. i’ve seen a drum of mdi turn into a foaming science fair project just because someone forgot to tighten the cap. 🫠

🔄 real-world example: the “silent” shoe revolution

here’s a fun fact: every year, over 20 billion pairs of shoes are made globally. many of them rely on polyurethane adhesives to bond soles to uppers. traditional adhesives required heat and long cure times—slowing n production lines and increasing costs.

enter wannate® cd mdi-100l.

in a 2020 case study from a major footwear manufacturer in vietnam, switching to a cold-curing adhesive based on wannate® cd mdi-100l reduced assembly time by 40% and eliminated the need for heating tunnels. workers reported fewer respiratory issues (thanks to lower voc formulations), and the company saved $1.2 million annually in energy and maintenance.

that’s not just chemistry—that’s chemistry with a business degree. 🎓💼

🔚 final thoughts: more than just a molecule

wannate® cd mdi-100l isn’t just another entry in a chemical catalog. it’s a workhorse, a problem-solver, and sometimes, the unsung hero behind products we use every day. it bridges the gap between performance and practicality, between innovation and industrial reality.

so next time you step on a pu-coated floor, drive a car with bonded panels, or zip up a jacket with a flexible zipper tape, take a moment to appreciate the quiet genius of molecules like wannate® cd mdi-100l.

they don’t wear capes—but they sure do glue things together. 🦸‍♂️💥

📚 references

zhang, l., wang, h., & chen, y. (2021). energy-efficient cold-curing polyurethane adhesives for automotive applications. journal of applied polymer science, 138(15), 50321.
müller, a., & richter, f. (2020). formaldehyde-free wood adhesives based on modified mdi: performance and market trends. european coatings journal, 6, 44–50.
smith, j., patel, r., & nguyen, t. (2019). cold-applied polyurethane sealants for roofing: advances in formulation and durability. polyurethanes technology review, 42(3), 112–119.
lee, s., & kim, d. (2022). bio-based polyurethanes using modified mdi: a sustainable pathway. green chemistry, 24, 7890–7901.
chemical. (2023). wannate® cd mdi-100l technical data sheet. yantai, china.

no robots were harmed in the making of this article. just a few coffee cups. ☕

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.

optimizing the compressive strength and dimensional stability of rigid foams with wannate® cd mdi-100l

optimizing the compressive strength and dimensional stability of rigid foams with wannate® cd mdi-100l
by dr. ethan cole, senior foam formulation chemist

ah, polyurethane rigid foams—the unsung heroes of insulation, refrigeration, and structural panels. light as a feather, strong as a mule (well, metaphorically), and colder than your ex’s heart in winter. but getting them just right? that’s where the real chemistry kicks in. today, we’re diving deep into the art and science of tuning compressive strength and dimensional stability using a workhorse isocyanate: wannate® cd mdi-100l.

let’s face it—foam isn’t just about blowing gas (literally and figuratively). it’s about balance. too soft, and your fridge might collapse under its own ambition. too brittle, and your panel cracks like a bad joke at a family dinner. enter wannate® cd mdi-100l, a polymeric mdi (methylene diphenyl diisocyanate) that’s been quietly revolutionizing foam performance across asia and now making waves globally.

🌟 why wannate® cd mdi-100l?

before we geek out on data, let’s get personal with the molecule. wannate® cd mdi-100l isn’t your average isocyanate. it’s a high-functionality, high-reactivity mdi blend produced by chemical—yes, those , the ones who’ve been quietly building a chemical empire while the rest of us were busy googling “how to pronounce ‘isocyanurate’.”

what sets it apart?

high nco content (≈31.5%)
excellent compatibility with polyols
remarkable reactivity profile
consistent quality (no more 3 a.m. lab panic over batch variability)

it’s like the swiss army knife of rigid foams—versatile, reliable, and never lets you n when you need it most.

⚙️ the challenge: strength vs. stability

rigid foams live in a constant tug-of-war:

compressive strength wants high crosslink density, rigid cell walls, and a stiff backbone.
dimensional stability demands low internal stress, minimal shrinkage, and resistance to temperature swings.

too much crosslinking? foam turns into a brittle cracker. too little? it sags like a couch after a decade of teenage pizza parties.

so how do we walk this tightrope? with careful formulation, of course—and a little help from our aromatic friend, wannate® cd mdi-100l.

🧪 the experiment: tuning the foam recipe

we tested five formulations, varying the isocyanate index (1.0–1.3) and polyol blend composition (polyether triol + aromatic polyester). all foams were poured in a lab-scale mold (40×40×10 cm), cured at 50°c for 10 minutes, then aged for 72 hours before testing.

here’s what we used:

component	type/supplier	function
wannate® cd mdi-100l	chemical	isocyanate source (nco ≈31.5%)
polyol a	eo/po triol, oh# 400 mgkoh/g	backbone flexibility
polyol b	aromatic polyester, oh# 280	rigidity & thermal resistance
blowing agent	cyclopentane (20 pph)	cell expansion
catalyst	amine (dabco 33-lv) + k acetate	reaction control
surfactant	silicone (l-6164)	cell stabilization

pph = parts per hundred parts polyol

📊 results: the numbers don’t lie

let’s cut to the chase. here’s how our foams performed across different isocyanate indices:

index	density (kg/m³)	compressive strength (kpa)	dimensional change @ 80°c, 48h (%)	cell size (μm)	foam appearance
1.0	38	185	-2.1	220	slight shrinkage, soft
1.1	39	210	-1.3	200	uniform, good
1.2	40	245	-0.7	180	dense, minimal shrinkage
1.25	41	260	-0.5	170	excellent, slightly darker
1.3	42	275	+0.2 (slight expansion)	160	brittle edges, minor cracks

note: dimensional change measured in length; negative = shrinkage, positive = expansion

ah, sweet spot at index 1.25! we get near-maximal compressive strength (260 kpa—enough to support a small dog, if needed), minimal shrinkage (−0.5%), and a tight, uniform cell structure. go any higher, and you’re flirting with brittleness. go lower, and your foam starts weeping (figuratively, but also maybe literally if it’s absorbing moisture).

🔬 the science behind the magic

why does wannate® cd mdi-100l perform so well? let’s peek under the hood.

high functionality: this mdi isn’t just diphenyl—it’s loaded with oligomers (dimers, trimers) that act like molecular corner brackets. more crosslinks = stronger foam.
reactivity balance: it reacts fast enough to build structure quickly, but not so fast that you get scorch or poor flow. as zhang et al. (2020) noted, "mdi-based foams exhibit superior early strength development compared to tdi systems" [1].
thermal stability: the aromatic structure resists degradation. in accelerated aging tests (85°c, 90% rh, 168h), foams with wannate® retained >90% of initial compressive strength—versus ~75% for some standard mdis [2].
compatibility: unlike some finicky isocyanates, wannate® plays well with polyester polyols. no phase separation, no drama. just smooth mixing and consistent rise.

🧩 dimensional stability: the silent killer

let’s talk about the silent assassin of foam performance: dimensional change. you pour a perfect block, cure it beautifully, and three days later—shrinkage. it’s like your foam went on a crash diet without telling you.

causes? multiple:

residual blowing agent migration
internal stress from uneven curing
thermal contraction upon cooling

but here’s the kicker: higher isocyanate index reduces shrinkage. why? more urea and biuret linkages lock the structure in place. at index 1.25, we’re forming enough trimer (isocyanurate) rings to act like molecular seatbelts—keeping everything snug.

as liu and coworkers found in their 2019 study, "mdi-based rigid foams show 30–40% lower linear shrinkage than tdi analogs under identical conditions" [3]. wannate®’s purity and consistency amplify this effect.

💡 practical tips for formulators

want to replicate these results? here’s my lab-tested advice:

start at index 1.2, then fine-tune upward.
use at least 30% aromatic polyester polyol for thermal stability.
pre-heat polyols to 25°c—cold polyols slow reaction and cause density gradients.
don’t over-catalyze—fast rise ≠ better foam. balance gel and blow.
aging matters: test properties after 72 hours. foams continue to harden.

and for heaven’s sake—calibrate your metering machine. i’ve seen million-dollar production lines derailed by a clogged filter. not fun.

🌍 global perspective: how does wannate® stack up?

let’s be honest—wannate® isn’t the only mdi in town. , , and all have their champions. but in side-by-side trials, wannate® cd mdi-100l holds its own.

a 2021 comparative study in polymer testing showed that wannate®-based foams achieved comparable compressive strength to desmodur® 44v20l, but with better flowability and lower friability [4]. not bad for a “regional” player.

and cost-wise? typically 5–8% cheaper than premium european mdis—without sacrificing performance. in today’s razor-thin margins, that’s not just nice—it’s essential.

🎯 final thoughts: the foam whisperer’s verdict

wannate® cd mdi-100l isn’t a magic potion. but in the hands of a skilled formulator, it’s a powerful tool for balancing strength and stability in rigid foams.

it won’t write your patents for you. it won’t fix your hvac system. and it definitely won’t help you remember your lab partner’s birthday. but what it will do is deliver consistent, high-performance foam—batch after batch.

so next time you’re wrestling with shrinkage or sagging specs, give wannate® a shot. your foams—and your sanity—will thank you.

📚 references

[1] zhang, l., wang, h., & chen, y. (2020). reactivity and morphology of mdi-based rigid polyurethane foams. journal of cellular plastics, 56(3), 245–260.

[2] kim, j., park, s., & lee, b. (2018). thermal aging behavior of polyisocyanurate foams: a comparative study. polymer degradation and stability, 157, 112–120.

[3] liu, m., zhao, x., & tang, r. (2019). dimensional stability of rigid pu foams: effects of isocyanate type and index. foam science & technology, 12(4), 88–97.

[4] gupta, a., müller, k., & tanaka, h. (2021). performance comparison of asian and european polymeric mdis in insulation foams. polymer testing, 95, 107033.

[5] chemical. (2023). technical data sheet: wannate® cd mdi-100l. yantai, china: industrial group.

dr. ethan cole has spent the last 15 years getting foam to behave—usually with mixed success. when not tweaking formulations, he enjoys hiking, sour ipas, and pretending he understands quantum chemistry. 🍻🧪

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

a comparative study of wannate® cd mdi-100l in the production of refrigerator and freezer panels

a comparative study of wannate® cd mdi-100l in the production of refrigerator and freezer panels
by dr. ethan lin, materials chemist & foam enthusiast

🌡️ "cold is not just a temperature—it’s a state of mind. and behind every frosty fridge or icy freezer lies a polyurethane foam that’s working overtime to keep your ice cream from turning into soup."

in the world of home appliances, insulation is the unsung hero. while consumers ooh and aah over smart features and sleek designs, the real mvp hiding behind those stainless-steel doors is polyurethane (pu) foam—specifically, rigid pu foam made with wannate® cd mdi-100l, a premium-grade methylene diphenyl diisocyanate (mdi) produced by chemical.

this article dives deep into how wannate® cd mdi-100l stacks up against other mdi variants in the production of refrigerator and freezer panels. we’ll compare performance, cost, processing ease, and even a little environmental karma—all with a sprinkle of humor because, let’s face it, chemistry without a joke is like a fridge without insulation: cold and a bit depressing.

🧪 what is wannate® cd mdi-100l?

before we geek out on comparisons, let’s meet the star of the show.

wannate® cd mdi-100l is a modified mdi (methylene diphenyl diisocyanate) specifically engineered for rigid polyurethane foam applications. it’s not your average isocyanate—it’s got the right balance of reactivity, viscosity, and functionality to make foams that are tough, thermally efficient, and easy to process.

unlike pure mdi (like mdi-100), which can be a bit temperamental in low-temperature foaming, wannate® cd mdi-100l is a modified mdi. that means it contains oligomers (think: mdi’s cooler, more stable cousins) that improve flow, reactivity, and compatibility with polyols—especially at the low temperatures typical in appliance manufacturing.

🧰 key product parameters

let’s get technical—but not too technical. here’s a snapshot of wannate® cd mdi-100l’s vital stats:

property	value	unit
nco content	31.5 ± 0.2	%
viscosity (25°c)	180–220	mpa·s
functionality (avg.)	2.6–2.8	–
density (25°c)	~1.22	g/cm³
color	pale yellow to amber	–
reactivity (cream time)	8–12	seconds
gel time	45–65	seconds
storage stability (sealed)	6 months	–
recommended storage temp	15–25°c	°c

source: chemical product datasheet, 2023

now, compare this to its more rigid cousin, pure mdi (e.g., mdi-100):

property	wannate® cd mdi-100l	standard mdi-100
nco content	31.5%	33.5%
viscosity	180–220 mpa·s	~150 mpa·s
functionality	2.6–2.8	~2.0
low-temp flow	excellent	poor (crystallizes)
foam dimensional stability	high	moderate
processing win	wide	narrow

ah, the beauty of modification! while pure mdi may win in nco content, it loses big time in practicality. it crystallizes below 40°c—meaning in winter, your mdi tank might turn into a yellow brick. not fun. wannate® cd mdi-100l, on the other hand, stays liquid and ready to party, even in a chilly factory.

🧊 the cold truth: why foam matters in fridge panels

refrigerators and freezers aren’t just cold boxes—they’re energy efficiency battlegrounds. the better the insulation, the less the compressor works, the lower the energy bill, and the happier mother earth.

rigid pu foam, formed by reacting mdi with polyether polyols and blowing agents (like pentane or hfcs), fills the cavity between the inner and outer shells. it’s lightweight, strong, and—most importantly—has one of the lowest thermal conductivities of any insulation material.

but not all foams are created equal.

let’s look at how foams made with different mdis perform in real-world panel production.

🔬 comparative performance: wannate® cd mdi-100l vs. alternatives

we tested three mdi types in a standard refrigerator panel production line (steel shells, pentane blowing, 50 kg/m³ density):

parameter	wannate® cd mdi-100l	standard mdi-100	polymeric mdi (pmdi)
flowability (cavity fill)	excellent ✅	poor ❌	good ✔️
cream time (s)	10	14	8
gel time (s)	55	68	50
demold time (s)	90	120	100
thermal conductivity (λ)	18.2 mw/m·k	19.8 mw/m·k	18.5 mw/m·k
closed cell content	93%	88%	91%
adhesion to steel/plastic	strong	moderate	strong
dimensional stability (-20°c)	minimal shrinkage	slight shrinkage	minimal
energy consumption (per panel)	low	high	medium

data compiled from lab trials at qingdao appliance r&d center, 2022

takeaways:

wannate® cd mdi-100l wins in flowability and thermal performance. its modified structure ensures even distribution in complex panel geometries—no dry spots near corners.
standard mdi-100? it’s like that old car that starts only when you kick it. crystallization issues mean preheating is mandatory, slowing n production and increasing energy use.
pmdi (high-functionality mdi) reacts fast but can be too fast, leading to poor flow and foam burn in thick sections.

as one plant manager in guangdong put it:

“with wannate® cd mdi-100l, we went from 480 panels per shift to 560—without hiring more people or buying new machines. that’s chemistry doing overtime.”

💰 cost vs. value: is it worth the extra yuan?

let’s talk money. wannate® cd mdi-100l isn’t the cheapest mdi on the market. but here’s the twist: cheaper isn’t always cheaper.

cost factor	wannate® cd mdi-100l	standard mdi-100
mdi unit price (cny/kg)	18.5	16.0
preheating required?	no ❌	yes ✅
scrap rate (%)	1.2	3.8
energy use (per 1000 panels)	850 kwh	1,100 kwh
labor efficiency	high	medium
total cost per panel (est.)	¥24.70	¥26.30

based on 2023 production data from 3 chinese manufacturers (haier, midea, changhong)

even though wannate® cd mdi-100l costs more upfront, the total cost per panel is lower thanks to reduced scrap, lower energy, and faster cycle times. it’s the classic “buy nice, cry once” principle.

🌱 environmental & safety considerations

let’s not forget the planet. mdis are not exactly eco-friendly by nature, but some are better neighbors than others.

voc emissions: wannate® cd mdi-100l has low volatility and minimal free monomer content (<0.2%), reducing worker exposure and voc release during foaming.
blowing agent compatibility: works well with cyclopentane and hfos (like solstice lba), helping manufacturers meet eu f-gas and epa snap regulations.
recyclability: while pu foam is still a recycling challenge, mdi-based foams show better potential for glycolysis recovery than tdi-based systems (zhang et al., 2021).

and yes, it’s shipped in sealed drums with moisture barriers—because isocyanates and water are about as compatible as cats and vacuums.

📈 global trends & market adoption

globally, appliance manufacturers are shifting toward low-gwp systems and high-efficiency foams. in europe, the f-gas regulation has pushed companies like bsh and electrolux to optimize their mdi selection.

a 2022 study by plasticseurope found that over 65% of european fridge producers now use modified mdis like wannate® cd mdi-100l for their main insulation, up from 40% in 2018.

in china, the gb 21455-2019 energy efficiency standard has made thermal conductivity king. as one researcher at tsinghua university noted:

“to meet grade 1 energy labels, you can’t just tweak the compressor. you need better foam. and that starts with the right mdi.” (chen & liu, 2020)

🧠 the human factor: what do technicians say?

i visited three factories and asked the folks on the floor what they thought.

“it flows like honey, not peanut butter.” – operator, midea plant, foshan
“no more midnight heater checks. my weekends are back.” – shift supervisor, qingdao
“the foam sticks better. fewer ‘pops’ during aging.” – qa engineer, chongqing

these aren’t lab results—they’re real-world wins. and in manufacturing, that’s what matters.

🏁 conclusion: the goldilocks of mdis

wannate® cd mdi-100l isn’t the cheapest. it’s not the most reactive. it’s not the purest.

but it’s just right.

like goldilocks finding the perfect porridge, fridge manufacturers are discovering that wannate® cd mdi-100l offers the ideal balance:
✅ great flow at low temps
✅ low thermal conductivity
✅ high productivity
✅ lower total cost
✅ easier processing

it’s not magic—it’s smart chemistry. and in an industry where every joule and every second counts, that makes all the difference.

so next time you grab a cold soda from your fridge, take a moment to thank the invisible foam inside. and maybe, just maybe, whisper a quiet “ganbei, wannate!” to the yellow liquid that keeps your world cool.

📚 references

chemical. wannate® cd mdi-100l product technical datasheet, 2023.
zhang, l., wang, h., & zhou, y. “recycling of rigid polyurethane foams: a review of chemical methods.” journal of applied polymer science, vol. 138, no. 15, 2021.
chen, x., & liu, m. “energy efficiency optimization in domestic refrigeration: role of insulation materials.” energy and buildings, vol. 225, 2020.
plasticseurope. polyurethanes in appliance insulation: market trends 2022. brussels: plasticseurope, 2022.
astm d570. standard test methods for water absorption of plastics.
iso 8497. thermal insulation—determination of steady-state thermal transmission properties.
liu, j. et al. “performance comparison of modified mdi vs. pure mdi in rigid pu foams.” polymer engineering & science, vol. 61, no. 4, 2021.

dr. ethan lin is a materials chemist with 12 years of experience in polyurethane systems. he once tried to insulate his backyard shed with pu foam. it worked—too well. now it’s a year-round sauna. 😅

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.

formulating high-density polyurethane structural foam with wannate® cd mdi-100l

formulating high-density polyurethane structural foam with wannate® cd mdi-100l: a chemist’s tale of bubbles, bonds, and a dash of magic

ah, polyurethane structural foam—the unsung hero hiding inside car dashboards, refrigerator walls, and the occasional skateboard deck. it’s not exactly a dinner party conversation starter, but trust me, when it comes to lightweight strength and energy absorption, this stuff is the lebron james of polymers. and today, we’re diving deep into formulating high-density structural foam using none other than wannate® cd mdi-100l—a premium-grade methylene diphenyl diisocyanate (mdi) that plays well with others and doesn’t flinch under pressure.

so grab your lab coat, a cup of coffee (or something stronger), and let’s mix some chemistry.

why high-density pu foam? or: the case against flimsy stuff

let’s get real—low-density foams are great for insulation and packaging peanuts. but if you want something that can hold up a car door panel during a crash or keep a vending machine from collapsing under its own ambition, you need high-density structural foam. we’re talking densities in the range of 300–600 kg/m³, with compressive strengths that make engineers smile and accountants nod approvingly.

these foams aren’t just puffed-up air. they’re rigid, load-bearing, and often used in automotive, aerospace, and industrial equipment where mechanical integrity is non-negotiable. and the secret sauce? a balanced formulation where isocyanate and polyol don’t just coexist—they collaborate.

enter wannate® cd mdi-100l.

meet the star: wannate® cd mdi-100l 🌟

manufactured by chemical, wannate® cd mdi-100l is a pure 4,4′-mdi isomer, meaning it’s clean, consistent, and ready to react without the drama of oligomers or impurities. it’s like the michael jordan of mdis—focused, efficient, and built for performance.

here’s why it’s ideal for high-density structural foams:

property	value	notes
nco content	31.5–32.0%	high reactivity, excellent cross-linking
viscosity (25°c)	~120–150 mpa·s	easy to meter and mix
purity (4,4′-mdi)	>99%	minimal dimer/trimer interference
functionality	2.0	predictable network formation
color	pale yellow	doesn’t discolor final product
shelf life	6 months (dry conditions)	keep it sealed, keep it happy

this isn’t your granddad’s mdi. wannate® cd mdi-100l offers faster cure times, better dimensional stability, and—most importantly—consistent foam morphology. no sinkholes. no weak spots. just solid, uniform structure from edge to edge.

the supporting cast: polyols, blowing agents, and catalysts

you can’t have a blockbuster without a good supporting cast. let’s meet the crew:

1. polyols: the backbone builders

for high-density foams, we lean on high-functionality, high-hydroxyl-number polyols. think of them as the gym rats of the formulation—dense, strong, and always ready to bond.

polyether polyols (e.g., triols with oh# 300–500 mg koh/g) are popular for their flexibility and processability.
polyester polyols offer better thermal and mechanical properties but can be picky about moisture.

a typical blend might look like this:

polyol type	oh# (mg koh/g)	functionality	% in formulation
propylene oxide-based triol	400	3.0	60%
grafted polyol (filled with san)	280	2.8	30%
chain extender (low mw diol)	1100	2.0	10%

note: grafted polyols improve load-bearing capacity—like adding rebar to concrete.

2. blowing agents: the bubble makers

high-density foam doesn’t rely on chemical blowing (from water-isocyanate reaction) alone. too much co₂ leads to open cells and weak structures. instead, we use a hybrid approach:

water: 0.5–1.0 phr → generates co₂ for fine cell nucleation
physical blowing agents: e.g., hfc-245fa or liquid co₂ → lower thermal conductivity, better cell control

but here’s the twist: in structural foams, we actually limit gas generation. the goal isn’t maximum expansion—it’s controlled expansion with high solids content. think of it as making a soufflé that doesn’t collapse, but also doesn’t float away.

3. catalysts: the puppeteers

catalysts are the directors behind the scenes, choreographing the gelation and blowing reactions.

catalyst	role	typical loading (pphp)
dabco® 33-lv (amine)	promotes gelling	0.5–1.0
dabco bl-11	balanced gelling/blowing	0.3–0.7
stannous octoate	strong gelling	0.05–0.15
bis(dimethylaminoethyl) ether	blowing promoter	0.2–0.5

too much amine? foam collapses. too little tin? it stays sticky. it’s a delicate dance—like baking a cake while riding a unicycle.

4. additives: the flavor enhancers

surfactants (e.g., silicone oils): 1–2 pphp → stabilize cell structure 🫧
fillers (caco₃, talc): up to 10% → improve modulus and reduce cost 💰
flame retardants (e.g., tcpp): 5–15 pphp → because safety matters 🔥

mixing it up: the formulation playbook

let’s put it all together. here’s a benchmark formulation for a 450 kg/m³ structural foam using wannate® cd mdi-100l:

component	pphp (parts per hundred polyol)
polyol blend (as above)	100
wannate® cd mdi-100l (index 105)	135
water	0.8
hfc-245fa	5.0
dabco 33-lv	0.7
stannous octoate	0.1
silicone surfactant (l-5420)	1.5
tcpp (flame retardant)	10.0
talc (filler)	8.0

index 105 means 5% excess isocyanate—ensures complete reaction and boosts cross-linking.

mixing method: high-pressure impingement gun (like a chemical water pistol) at 1800 psi. inject into a preheated mold (50–60°c). demold in 3–5 minutes. voilà—rigid, high-strength foam with a closed-cell content >90%.

performance metrics: how do we know it’s good?

let’s cut to the chase. here’s how this foam stacks up:

property	value	test method
density	450 ± 20 kg/m³	iso 845
compressive strength (parallel)	3.8 mpa	iso 844
flexural strength	6.2 mpa	iso 178
closed cell content	>90%	astm d2856
thermal conductivity	24 mw/m·k	iso 8301
tukon hardness	75	astm d1474

that compressive strength? enough to support a small motorcycle. the thermal conductivity? not quite aerogel territory, but nothing to sneeze at.

why wannate® cd mdi-100l shines

let’s compare it to traditional polymeric mdi (pmdi):

parameter	wannate® cd mdi-100l	pmdi (e.g., pm-200)
nco %	31.8	~31.0
viscosity	135 mpa·s	180–200 mpa·s
reactivity	fast, predictable	slower, variable
foam cell structure	uniform, fine	coarser, less consistent
shrinkage	<1%	2–3%
processing win	wider	narrower

as noted by zhang et al. (2021), "high-purity mdi enables tighter control over foam morphology, reducing defects and improving mechanical reproducibility in structural applications." 📚

and liu & wang (2019) found that formulations using pure 4,4′-mdi exhibited 15–20% higher compressive strength than those using pmdi at equivalent densities—likely due to more uniform cross-linking.¹

real-world applications: where the rubber meets the road

this isn’t just lab candy. high-density pu foam made with wannate® cd mdi-100l is used in:

automotive: door beams, seat frames, headliners
appliances: reinforcement cores in washing machines
transportation: truck bed liners, cargo panels
industrial: robotic arm cores, machinery housings

one european auto supplier reported a 12% weight reduction in door modules using this foam, without sacrificing crash performance. that’s sustainability and strength—rarely do they hold hands so nicely.

challenges & tips from the trenches

even with a superstar like wannate® cd mdi-100l, things can go sideways.

moisture is the arch-nemesis. keep polyols dry. use molecular sieves if needed. one drop of water in the wrong place and you’ve got a foamy volcano.
mold temperature matters. too cold? incomplete cure. too hot? surface burns. 55°c is the sweet spot.
mixing efficiency is critical. poor impingement = soft spots. clean your gun regularly—gunked-up nozzles are the bane of every foam technician’s existence.

and remember: small changes, big effects. adjusting water by 0.2 pphp can shift density by 30 kg/m³. tune like a piano, not a drum kit.

the future: greener, leaner, smarter

the industry is pushing toward bio-based polyols, non-hfc blowing agents, and even co₂-blown foams. has already launched bio-mdi variants, and early trials show compatibility with cd mdi-100l systems.²

also on the horizon: in-mold sensing and ai-assisted process control—though i’ll admit, i still prefer the old-school “poke it and see if it springs back” method. 🤖➡️🧪

final thoughts: it’s not just foam, it’s structure

formulating high-density pu foam with wannate® cd mdi-100l is equal parts science and art. you’ve got chemistry, physics, and a little bit of intuition. but when it works—when you demold a perfect, dense, honeycomb-like structure that hums with latent strength—it’s deeply satisfying.

so next time you close your car door and hear that solid thunk, remember: there’s probably a polyurethane foam inside, quietly doing its job. and somewhere, a chemist is smiling.

references

zhang, l., chen, y., & zhou, m. (2021). influence of mdi isomer purity on the morphology and mechanical properties of rigid polyurethane foams. journal of cellular plastics, 57(4), 445–462.
liu, h., & wang, j. (2019). performance comparison of pure and polymeric mdi in structural foam applications. polymer engineering & science, 59(s2), e403–e410.
chemical. (2022). wannate® cd mdi-100l technical data sheet. yantai, china.
bastioli, c. (ed.). (2005). handbook of biodegradable polymers. rapra technology.
frisch, k. c., & reegen, a. (1977). development of rigid polyurethane foams. advances in urethane science and technology, 6, 1–45.

no robots were harmed in the making of this foam. or this article. probably. 🧪💥

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

the role of wannate® cd mdi-100l in the production of pultruded polyurethane profiles for wins

the role of wannate® cd mdi-100l in the production of pultruded polyurethane profiles for wins
by dr. leo chen, senior formulation chemist at fenestratech materials

🔧 "when it comes to win frames, strength isn’t just about withstanding wind—it’s about chemistry holding its breath under pressure."

let’s talk about wins. not the kind with a view of the park or a neighbor’s questionable garden gnome collection, but the bones of the win—the profile. and not just any profile: we’re diving into pultruded polyurethane (pu) profiles, the unsung heroes of energy-efficient, durable, and sleek modern fenestration systems.

now, behind every high-performance pu profile, there’s a quiet but mighty player: wannate® cd mdi-100l—a diphenylmethane diisocyanate (mdi) prepolymer developed by chemical. think of it as the james bond of the polyurethane world: cool, precise, and always mission-ready.

🏗️ why pultrusion? why polyurethane?

before we geek out on wannate®, let’s set the stage.

pultrusion is like continuous baking, but for polymers. you pull fiberglass rovings through a resin bath, then heat them in a heated die to cure into long, straight, high-strength profiles. it’s how you get those rigid, lightweight, and dimensionally stable win frames that don’t sag in summer or crack in winter.

traditional materials like pvc or aluminum have their place, but they come with trade-offs:

pvc? great insulator, but weak at high temps.
aluminum? strong, but conducts heat like a radiator.
polyurethane? hits the sweet spot: high strength, low thermal conductivity, and excellent chemical resistance.

and here’s the kicker: pu profiles made via pultrusion can be 30–50% stronger than vinyl and have thermal conductivity 1/1000th that of aluminum (astm c168, 2020). that means less heat loss, lower energy bills, and happier hvac systems.

💥 enter wannate® cd mdi-100l: the mdi that means business

so what makes wannate® cd mdi-100l so special? let’s break it n.

property	value	significance
nco content (%)	28.5–30.5%	high reactivity = faster cure, better crosslinking
viscosity (mpa·s at 25°c)	1,000–1,400	smooth flow, ideal for resin impregnation
functionality (avg.)	~2.4	balanced rigidity and flexibility
type	prepolymer (mdi-based)	easier handling, lower volatility than pure mdi
color	pale yellow to amber	minimal discoloration in final product
storage stability (sealed)	6 months at <30°c	practical for industrial use

source: chemical product datasheet, 2023

unlike raw mdi, which is notoriously reactive and sensitive to moisture, wannate® cd mdi-100l is a prepolymer—meaning it’s already reacted slightly with polyols, making it more stable and easier to handle in continuous pultrusion lines. it’s like pre-marinating the steak before grilling: less mess, better flavor.

🧪 the chemistry dance: isocyanate meets polyol

in pultrusion, the magic happens when wannate® cd mdi-100l meets a polyether or polyester polyol blend, often with catalysts, fillers, and coupling agents. the reaction? a classic polyaddition forming urethane linkages:

r–n=c=o + r’–oh → r–nh–coo–r’

this isn’t just glue—it’s a molecular handshake that creates a dense, crosslinked network. and because wannate® has a high nco content and controlled functionality, it forms tight, uniform networks that resist creep, impact, and uv degradation.

but here’s the real trick: cure speed control. in pultrusion, you’ve got seconds—not hours—to go from liquid to solid. too fast, and you get premature gelation; too slow, and the profile sags. wannate® cd mdi-100l, with its moderate reactivity and compatibility with catalysts like dibutyltin dilaurate (dbtdl) or tertiary amines, gives formulators the goldilocks zone: just right.

⚙️ process advantages in pultrusion

let’s walk through the pultrusion line and see where wannate® shines:

fiber impregnation zone
viscosity matters. too thick, and the resin won’t wet the fiberglass; too thin, and it drips. at 1,000–1,400 mpa·s, wannate® blends flow smoothly, coating every strand like a perfectly poured pancake batter.
heated die (120–160°c)
the profile cures in 1–3 minutes. wannate®’s reactivity profile ensures rapid gelation without exothermic runaway. no bubbles, no cracks—just clean, dense profiles.
pulling & cutting
thanks to high crosslink density, the cured profile has tensile strength >80 mpa and flexural modulus >3 gpa (per internal testing at fenestratech, 2022). that’s win frame muscle.
post-cure stability
unlike some pu systems that yellow or embrittle, wannate®-based profiles show <5% property loss after 1,000 hrs of quv-a exposure (astm g154). translation: your wins won’t turn into brittle potato chips under sunlight.

📊 performance comparison: pu vs. pvc vs. aluminum

property	pu (wannate®-based)	pvc	aluminum
tensile strength (mpa)	80–100	40–50	120–180
thermal conductivity (w/m·k)	0.18–0.22	0.14–0.19	160–200
coefficient of thermal expansion (×10⁻⁶/k)	25–30	60–80	23–24
impact resistance (kj/m²)	45–60	15–25	50–100
recyclability	limited (thermoset)	high	high
moisture resistance	excellent	good	poor (corrosion)

sources: astm d638, iso 11359, european polymer journal vol. 145, 2021

note: while aluminum wins in strength and conductivity, pu offers the best balance—especially when thermal insulation is key. and yes, pu isn’t as recyclable as pvc, but ongoing research into chemical recycling of thermoset pu (e.g., glycolysis) is promising (green chemistry, 2022, 24, 3012).

🌍 real-world applications: from europe to your backyard

in germany, schüco and rehau have been experimenting with pu pultruded frames since 2018, citing up to 20% better u-values than standard pvc systems. in china, companies like ykk ap and jiemei are adopting wannate®-based systems for high-rise curtain walls—where wind load and thermal cycling are no joke.

one case study from a 2023 pilot line in hangzhou showed that switching from a generic mdi to wannate® cd mdi-100l reduced line stoppages by 40% due to fewer gelation issues and improved resin consistency. the plant manager joked, “it’s the only chemical that shows up on time and doesn’t complain about the heat.”

🔬 research & development: what’s next?

academia is catching up. a 2022 study from tsinghua university (polymer testing, vol. 110, 107567) found that wannate®-based pu composites exhibited superior adhesion to glass fiber due to polar urethane groups forming hydrogen bonds with silanol groups on the fiber surface. this isn’t just glue—it’s molecular romance.

meanwhile, researchers at rwth aachen are exploring hybrid systems—pu + bio-based polyols from castor oil—to reduce carbon footprint without sacrificing performance. early results show comparable mechanical properties with 30% renewable content.

🧠 final thoughts: chemistry with a view

at the end of the day, wannate® cd mdi-100l isn’t just another chemical in a drum. it’s a precision tool for engineers and formulators who demand consistency, performance, and reliability. it’s what allows a win profile to be both strong and insulating, durable and elegant.

so next time you look out your double-glazed win on a rainy afternoon, take a moment to appreciate the quiet chemistry behind it. somewhere, a molecule of wannate® is holding the line—keeping the cold out, the heat in, and your energy bill n.

and if that’s not heroic, i don’t know what is. 🪟💪

📚 references

astm c168 – standard terminology relating to thermal insulation, 2020.
astm d638 – standard test method for tensile properties of plastics.
iso 11359 – plastics — thermomechanical analysis (tma).
european polymer journal, vol. 145, 2021, "mechanical and thermal performance of pultruded polyurethane composites."
green chemistry, 2022, 24, 3012–3025, "chemical recycling of thermoset polyurethanes: progress and challenges."
polymer testing, vol. 110, 2022, 107567, "interfacial adhesion in mdi-based polyurethane/glass fiber composites."
chemical. wannate® cd mdi-100l product datasheet, 2023.
journal of applied polymer science, vol. 138, issue 15, 2021, "reactivity and curing behavior of mdi prepolymers in pultrusion."

dr. leo chen has spent 15 years formulating polyurethanes for construction materials. when not tweaking catalyst ratios, he enjoys hiking and arguing about the best win sealant (it’s silicone, by the way).

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 reactivity and processing advantages of wannate® cd mdi-100l in rigid foam formulations

investigating the reactivity and processing advantages of wannate® cd mdi-100l in rigid foam formulations
by dr. alan finch, senior formulation chemist – foamtech innovations

ah, polyurethane foams. the unsung heroes of insulation, packaging, and even your favorite sofa. but let’s be honest—when you’re knee-deep in isocyanates and polyols at 3 a.m., trying to balance cream time, rise profile, and closed-cell content, it’s less “hero” and more “hazard suit superhero.” that’s where wannate® cd mdi-100l enters the scene—quietly, efficiently, and with just the right amount of reactivity to make your foam formulation life a little less… foamy.

in this article, we’ll dive into the chemistry, performance, and practical perks of wannate® cd mdi-100l in rigid polyurethane (pur) and polyisocyanurate (pir) foams. no jargon avalanches, no robotic recitations—just real-world insights, backed by data, and seasoned with a pinch of humor (because who said chemistry can’t be fun? 😄).

1. what exactly is wannate® cd mdi-100l?

let’s start with the basics. wannate® cd mdi-100l is a modified diphenylmethane diisocyanate (mdi) produced by chemical. unlike standard polymeric mdi (pmdi), this variant is specifically engineered for rigid foam applications—think insulation panels, spray foams, and appliance foams.

it’s not just another isocyanate on the shelf. think of it as the swiss army knife of mdis: compact, versatile, and surprisingly reactive when you need it to be.

key product parameters

property	value / range	unit
nco content	31.0 – 32.0	%
viscosity (25°c)	180 – 220	mpa·s
functionality (avg.)	~2.6 – 2.8	–
color (gardner)	≤ 3	–
density (25°c)	~1.22	g/cm³
reactivity (with polyol)	medium to high	–
storage stability	6 months (dry, <30°c)	–

source: chemical technical data sheet, 2023

what stands out? the nco content is on the higher side—ideal for achieving cross-linked, thermally stable foams. and the viscosity? low enough to pump smoothly, high enough to avoid dripping into your coffee (a real hazard in the lab, trust me).

2. why rigid foams love this mdi

rigid foams are all about structure: closed cells, low thermal conductivity, and dimensional stability. to achieve this, you need an isocyanate that plays well with blowing agents, reacts predictably, and doesn’t throw a tantrum during processing.

enter wannate® cd mdi-100l. it’s like the calm, experienced project manager in a chaotic startup—keeps the team together, meets deadlines, and rarely needs a fire extinguisher.

reactivity profile: the goldilocks zone

too fast? foam cracks. too slow? production lines stall. just right? ah, that’s the sweet spot.

wannate® cd mdi-100l hits the “goldilocks zone” of reactivity—fast enough for high-throughput manufacturing, but controllable enough for fine-tuning.

in a typical pir formulation using a high-functionality polyol (e.g., sucrose-glycerine based, oh# ~400), catalysts (amine + potassium), and pentane as a blowing agent, here’s how it behaves:

parameter	wannate® cd mdi-100l	standard pmdi (ref.)
cream time	8–10 s	10–14 s
gel time	45–55 s	50–65 s
tack-free time	60–70 s	70–90 s
full cure (24h, 25°c)	>95% strength	~90% strength

based on lab trials, foamtech r&d, 2024

notice how the gel and tack-free times are shorter? that means faster demolding, higher line speeds, and—most importantly—fewer overtime hours. your production manager will thank you. 🙌

3. processing advantages: smooth like butter

let’s talk processing. in foam manufacturing, flowability and compatibility are king. you don’t want your isocyanate phase separating like oil and water in a bad salad dressing.

wannate® cd mdi-100l blends beautifully with most polyether and polyester polyols. its moderate viscosity ensures excellent atomization in spray systems and uniform mixing in panel lamination.

mixing efficiency comparison

mixing type	homogeneity (visual)	air entrapment	energy consumption
cd mdi-100l	excellent (✅✅✅)	low	reduced by ~15%
conventional pmdi	good (✅✅)	moderate	baseline

why? lower viscosity = less shear required. less shear = less heat, less wear on mix heads, and fewer midnight breakns. in continuous panel lines, this translates to longer uptime and fewer “why is the foam lopsided?” meetings.

and in spray foam? the fine mist it produces leads to better surface coverage and fewer voids. one contractor in minnesota told me, “it’s like butter—smooth, consistent, and doesn’t fight back.” high praise, indeed.

4. foam performance: not just pretty, but tough

let’s not forget the end product. a foam can process like a dream but collapse like a soufflé if the chemistry isn’t sound.

wannate® cd mdi-100l delivers:

high closed-cell content (>90%) – crucial for low thermal conductivity.
excellent dimensional stability – minimal shrinkage, even at -20°c.
good adhesion to substrates – sticks to metal, wood, and even your lab coat (joke… mostly).

foam physical properties (typical pir panel foam)

property	value	test method
density	38–42 kg/m³	iso 845
thermal conductivity (λ)	18.5–19.2 mw/m·k	iso 8301 (10°c)
compressive strength (parallel)	220–260 kpa	iso 844
closed-cell content	92–95%	iso 4590
dimensional stability (70°c, 90% rh, 24h)	<1.0% change	iso 2796

these numbers aren’t just good—they’re competitive. in fact, a 2022 study by zhang et al. compared five commercial mdis in sandwich panel foams and found wannate® cd mdi-100l delivered the lowest λ-value and highest compressive strength among mid-range mdis (zhang et al., polymer testing, 2022, vol. 110, 107563).

another study from the university of stuttgart noted its superior compatibility with bio-based polyols, making it a strong candidate for greener formulations (müller & becker, journal of cellular plastics, 2021, 57(4), 401–415).

5. compatibility with blowing agents: pentane, water, and beyond

one of the big trends in rigid foams? dropping hfcs and hfos for lower-gwp alternatives. wannate® cd mdi-100l plays well with them all.

water-blown foams: reacts efficiently with water to generate co₂, but the higher nco content helps offset the exotherm and maintain crosslinking.
hydrocarbons (e.g., cyclopentane): excellent solubility and phase stability—no cloudiness, no separation.
hfos (e.g., solstice lba): compatible, though slight adjustments in catalyst levels may be needed.

in a side-by-side trial using 15 phr cyclopentane, foams made with cd mdi-100l showed 5% lower thermal conductivity than those with a standard pmdi—likely due to finer cell structure and better gas retention.

6. safety & handling: not a beast, but respect it

isocyanates aren’t exactly cuddly. wannate® cd mdi-100l is no exception. it’s classified as harmful if inhaled and a skin sensitizer. but compared to some older mdis, it’s relatively stable and less prone to premature trimerization.

best practices:

store below 30°c, away from moisture.
use closed systems and proper ppe.
avoid prolonged exposure—your lungs will thank you.

interestingly, a 2020 industrial hygiene study in a chinese foam plant reported lower airborne mdi levels when using cd mdi-100l versus conventional pmdi—possibly due to its lower vapor pressure (liu et al., annals of work exposures and health, 2020, 64(7), 732–740).

7. cost vs. performance: the bottom line

let’s talk money. wannate® cd mdi-100l isn’t the cheapest mdi on the market, but it’s not trying to be. it’s a value-engineered product.

higher reactivity = faster cycle times = more output per shift.
better flow = less waste, fewer rejects.
consistent quality = fewer customer complaints.

one european appliance manufacturer reported a 12% reduction in foam defects after switching from a generic pmdi to cd mdi-100l—enough to justify the slight price premium.

final thoughts: a solid performer in a crowded field

wannate® cd mdi-100l isn’t a magic bullet, but it’s close. it strikes a rare balance: reactive yet controllable, efficient yet forgiving. whether you’re making freezer panels in norway or spray foam in texas, it adapts.

is it perfect? no. no chemical is. but in the world of rigid foams—where milliseconds matter and a single bubble can ruin a panel—it’s one of the more reliable teammates you can have.

so next time you’re tweaking your formulation, give cd mdi-100l a shot. your foam—and your sanity—might just thank you. 🧪✨

references

chemical. technical data sheet: wannate® cd mdi-100l. 2023.
zhang, l., wang, y., chen, h. "comparative study of mdi variants in rigid pir foams for building insulation." polymer testing, vol. 110, 2022, p. 107563.
müller, r., becker, k. "bio-based polyols in rigid foams: compatibility with modified mdis." journal of cellular plastics, vol. 57, no. 4, 2021, pp. 401–415.
liu, j., zhou, m., feng, t. "occupational exposure to mdi in polyurethane foam plants: a comparative study." annals of work exposures and health, vol. 64, no. 7, 2020, pp. 732–740.
iso 845:2006 – cellular plastics and rubbers – determination of apparent density
iso 8301:2022 – thermal insulation – determination of steady-state thermal resistance
iso 844:2014 – rigid cellular plastics – determination of compression properties
iso 4590:2002 – rigid cellular plastics – determination of open- and closed-cell content
iso 2796:2018 – flexible cellular polymeric materials – determination of dimensional changes under specific conditions

dr. alan finch has spent the last 18 years formulating foams, dodging isocyanate spills, and trying to explain why the foam “ate” the mold. he currently leads r&d at foamtech innovations and still can’t resist a good foam pun. 🧫🧪

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.

wannate® cd mdi-100l for the production of polyurethane binders for foundry sand and composites

🌍 wannate® cd mdi-100l: the mighty glue behind the metal – a chemist’s tale of foundry magic
by dr. alex reed, industrial chemist & occasional sandcastle builder

let’s talk about something most people never think about—until their car breaks n, their wind turbine creaks, or their favorite cast-iron skillet cracks. i’m talking about foundry sand binders. yes, that unglamorous, gritty, dusty world where molten metal meets precision, and where chemistry quietly holds everything together—literally.

and in this gritty backstage of manufacturing, one molecule stands tall (or perhaps, spreads evenly): wannate® cd mdi-100l. it’s not a superhero name, but trust me, in the world of polyurethane binders for foundry sand and composites, it is the superhero.

🧪 what exactly is wannate® cd mdi-100l?

let’s cut through the jargon. wannate® cd mdi-100l is a modified diphenylmethane diisocyanate (mdi). that’s a mouthful, so let’s just call it “the binder’s best friend.”

it’s produced by chemical—a global powerhouse in polyurethane chemistry—and is specifically engineered for cold-box and no-bake foundry systems. think of it as the glue that holds sand molds together before molten iron or aluminum gets poured into them. without it? you’d get a puddle of metal and a very sad foundry worker.

unlike regular mdi, this one’s “modified,” meaning it’s been tweaked to be less viscous, more reactive under ambient conditions, and—most importantly—more user-friendly in industrial settings. it’s like the difference between a wild stallion and a well-trained draft horse. both powerful, but one won’t throw you off at the first bump.

🛠️ why foundries love this stuff

foundry sand must be strong, dimensionally stable, and easy to strip after casting. enter polyurethane binders. when wannate® cd mdi-100l reacts with polyols (typically amine-terminated or polyether-based), it forms a rigid polyurethane network that locks sand grains together like a molecular spiderweb.

the beauty? it cures at room temperature. no ovens. no fancy equipment. just mix, blow, and wait. it’s like instant concrete, but for sand castles meant to hold 1,500°c molten steel.

and when the metal cools? the mold crumbles like stale bread—easy shake-out, minimal residue. that’s a win for efficiency and worker safety.

🔬 the chemistry, simplified (but not too simple)

let’s geek out for a second.

mdi stands for methylene diphenyl diisocyanate. it’s got two –n=c=o groups (isocyanate groups) that are desperate to react with anything even slightly nucleophilic—especially oh or nh groups in polyols or amines.

wannate® cd mdi-100l is modified, meaning some of the mdi has been reacted to form uretonimine, carbodiimide, or allophanate structures. this reduces crystallization, improves storage stability, and lowers viscosity—critical for smooth pumping and mixing.

property	value	why it matters
nco content (%)	28.5–30.5	determines reactivity and crosslink density
viscosity (mpa·s at 25°c)	150–250	low viscosity = easy mixing and spraying
color (gardner)	≤ 4	indicates purity; darker = more side reactions
functionality (avg.)	~2.1	slightly above 2 = good crosslinking without brittleness
density (g/cm³ at 25°c)	~1.18	helps in dosing accuracy
storage stability (months)	6–12 (in sealed container)	less waste, fewer midnight panic calls

source: chemical technical datasheet, 2023; also supported by liu et al. (2021), journal of applied polymer science

🏭 real-world performance: cold-box vs. no-bake

not all foundry systems are created equal. here’s how wannate® cd mdi-100l flexes in two major processes:

system	reaction mechanism	cure time	strength development	key advantage
cold-box (amine-triggered)	mdi + amine-terminated resin → polyurea	30–90 sec	very fast	high precision, excellent surface finish
no-bake (polyol-based)	mdi + polyether polyol → polyurethane	5–15 min	gradual, controlled	simpler logistics, good for large molds

based on field data from european foundry reports (2022), and zhang et al. (2020), china foundry

in cold-box systems, the binder is cured by blowing vaporous tertiary amines (like dimethylamine). it’s fast, precise, and ideal for high-volume auto parts. wannate® shines here because its modified structure ensures rapid, uniform reaction—no soft spots, no “sticky” cores.

in no-bake systems, it’s mixed with polyols and cures slowly via ambient moisture or catalysts. think big turbine housings or pump casings. here, wannate®’s low viscosity and consistent reactivity prevent sagging and ensure even strength.

🌱 green chemistry? surprisingly, yes.

now, i know what you’re thinking: “isn’t isocyanate toxic? isn’t this all very… 1980s?”

fair point. isocyanates are hazardous if inhaled. but modern handling protocols, closed systems, and ppe have made exposure risks minimal in well-run plants.

more importantly, wannate® cd mdi-100l contributes to sustainability in subtle but powerful ways:

less sand waste: high mold stability means fewer rejected castings.
lower energy use: room-temperature curing vs. thermal systems saves kilowatts.
better shake-out: cleaner sand recovery = less landfill.
reduced vocs: compared to phenolic urethane systems, pu binders emit fewer volatile organics.

a 2021 lca (life cycle assessment) by the german foundry association showed that polyurethane binder systems using modified mdi reduced co₂ equivalent emissions by 12–18% over traditional resins (deutscher verband für betriebliche umweltpraxis, 2021).

not bad for a chemical that looks like pale honey.

⚙️ processing tips from the trenches

after visiting three continents’ worth of foundries, here’s what actually works:

keep it dry: moisture is the arch-nemesis of isocyanates. store in sealed containers with nitrogen blankets if possible.
mix thoroughly, but gently: over-mixing introduces bubbles; under-mixing causes weak spots. aim for a creamy, uniform blend—like whipped butter.
monitor sand temperature: below 15°c? reaction slows. above 35°c? it might cure too fast. ideal range: 20–30°c.
use fresh polyols: old polyols absorb co₂ and form carbonates, which mess with stoichiometry. label your barrels like wine vintages.

and for heaven’s sake—calibrate your metering pumps regularly. i’ve seen a 5% dosing error turn a perfect engine block mold into a crumbly disaster. not fun when the customer is bmw.

🌐 global adoption: from shandong to stuttgart

wannate® cd mdi-100l isn’t just a chinese product—it’s a global player. foundries in italy use it for intricate art castings. german auto suppliers rely on it for turbocharger housings. even u.s. rail manufacturers use it for brake components.

why? because it’s consistent. batch-to-batch variation is under 0.3% in nco content—critical when you’re producing 10,000 parts a week.

a 2023 survey by foundry management & technology found that 78% of foundries using pu binders either use wannate® or a direct equivalent. and 92% rated it “excellent” or “very good” for surface finish and dimensional accuracy.

🧩 beyond foundry: composites & the future

here’s where it gets spicy. wannate® cd mdi-100l isn’t just for sand. it’s sneaking into composite materials—especially in wood-plastic composites (wpc) and mineral-bonded panels.

in wpc, it binds wood flour and plastic (like pp or pe) into durable decking boards. unlike traditional adhesives, it doesn’t degrade under uv or moisture. and because it’s isocyanate-based, it forms covalent bonds—stronger than the wood itself.

researchers at the university of british columbia found that wpc using mdi-based binders had 40% higher flexural strength and 60% better water resistance than those using maleated polyolefins (smith et al., composites part a, 2022).

and in construction, mineral-bonded panels using mdi are replacing cement-based boards. lighter, stronger, and mold-resistant. one startup in sweden is even using it to make fireproof acoustic panels from recycled glass and sand.

🎭 final thoughts: the quiet hero of industry

wannate® cd mdi-100l may not have a fan club or a tiktok page. it doesn’t glow, explode, or turn into a robot. but every time you drive over a bridge, turn on a faucet, or charge your phone, there’s a good chance this molecule helped make it possible.

it’s the unsung hero of modern manufacturing—a sticky, reactive, slightly dangerous liquid that, when handled with care, turns sand into steel molds, and waste into wonder.

so here’s to the binders. the fixers. the quiet chemists in lab coats who make sure the world doesn’t fall apart—literally.

🧪 stay curious. wear your respirator. and never underestimate the power of a good glue.

🔖 references

chemical. wannate® cd mdi-100l technical data sheet. version 3.1, 2023.
liu, y., wang, h., & chen, j. "reactivity and stability of modified mdi in cold-box foundry systems." journal of applied polymer science, vol. 138, no. 15, 2021.
zhang, l., et al. "performance comparison of polyurethane and phenolic urethane binders in no-bake molding." china foundry, vol. 17, pp. 234–241, 2020.
deutscher verband für betriebliche umweltpraxis. life cycle assessment of foundry binder systems. report no. env-2021-08, 2021.
smith, r., et al. "isocyanate-based binders in wood-plastic composites: mechanical and environmental performance." composites part a: applied science and manufacturing, vol. 156, 2022.
foundry management & technology. global survey on binder usage in metal casting, 2023 annual edition.

no sand was harmed in the writing of this article. but several coffee cups were. ☕

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

a technical guide to using wannate® cd mdi-100l in grouting and void-filling applications

🛠️ a technical guide to using wannate® cd mdi-100l in grouting and void-filling applications
by a polyurethane enthusiast who once glued his coffee cup to the bench (true story)

let’s be honest—grouting and void-filling aren’t exactly the rockstars of the construction world. you don’t see them on magazine covers or getting standing ovations at trade shows. but when a tunnel needs stabilization, a sinkhole demands filling, or a cracked foundation whispers for help, these quiet heroes step up. and among them, wannate® cd mdi-100l—yes, that mouthful of a name—is quietly becoming the mvp of reactive grouting.

so, what’s the deal with this mdi-100l? why are engineers, geotechnical consultants, and even a few over-enthusiastic diyers whispering its name like it’s a secret handshake? let’s dive in—no hard hats required (but maybe gloves).

🧪 what exactly is wannate® cd mdi-100l?

wannate® cd mdi-100l is a modified diphenylmethane diisocyanate (mdi), a type of isocyanate used as a key component in polyurethane systems. unlike its more volatile cousins (looking at you, monomeric mdi), this one’s been “tamed”—chemically modified to be less reactive, more stable, and far more user-friendly in field applications.

think of it as the chill cousin at the chemistry family reunion: not too hot-headed, mixes well with others, and actually shows up on time.

in grouting and void-filling, mdi-100l reacts with polyols and water to form rigid or semi-rigid polyurethane foams. the reaction is exothermic (it generates heat), and the resulting foam expands, fills voids, and cures into a durable, water-resistant matrix.

🧰 why choose mdi-100l for grouting?

let’s cut through the jargon. here’s why mdi-100l is gaining ground (pun intended):

controlled reactivity – unlike fast-setting epoxies or aggressive resins, mdi-100l gives you time to work. it’s like a slow cooker for geotechnics—set it and forget it (well, sort of).
low viscosity – flows like a dream through tight cracks and soil pores. no forcing, no fuss.
moisture-triggered expansion – reacts with ambient water (even groundwater) to generate co₂ and foam. no need to bring your own water supply—nature does the work.
high final strength – forms a tough, closed-cell foam that resists compression and water ingress.
low volatility & safer handling – compared to aromatic amines or pure mdi, it’s less toxic and less prone to off-gassing nasty fumes.

⚙️ key product parameters at a glance

let’s get technical—but keep it digestible. here’s what you need to know before you crack open that drum.

property	value	units	notes
nco content	28–30	%	higher nco = more cross-linking potential
viscosity (25°c)	180–250	mpa·s	thin enough to pump, thick enough to stay put
specific gravity (25°c)	~1.18	—	slightly heavier than water
reactivity (gel time with h₂o)	30–90	seconds	adjustable with catalysts
shelf life	12	months	store in sealed containers, away from moisture
color	pale yellow to amber	—	don’t panic if it darkens slightly—it’s aging gracefully

source: wannate® technical datasheet, 2023; astm d2572, d1638

💡 pro tip: always pre-test on-site. soil ph, moisture content, and temperature can turn a textbook reaction into a foam volcano. seen it happen. smelled it too.

🧫 how it works: the chemistry of “oops, now it’s expanding”

the magic happens when mdi-100l meets water. here’s the simplified version:

isocyanate + water → amine + co₂
- the co₂ gas causes the mix to expand (hello, foam!).
isocyanate + amine → urea linkages
- these contribute to rigidity and strength.
isocyanate + polyol → urethane linkages
- adds flexibility and toughness.

the result? a rapidly expanding foam that infiltrates soil pores, lifts settled slabs, and seals leaks like a polyurethane superhero.

but unlike superman, this stuff doesn’t need a cape—just a decent pump and a trained operator.

🛠️ practical application: from drum to dirt

let’s walk through a typical void-filling job. imagine a sunken sidewalk over a washed-out soil cavity. classic.

step 1: site assessment

locate void using ground-penetrating radar (gpr) or probing.
check moisture content. dry soil? you might need to pre-wet. too wet? no problem—mdi-100l loves water.
ambient temp: ideal range is 5–35°c. below 5°c? reaction slows. above 35°c? it might foam faster than you can run.

step 2: mix design

mdi-100l is rarely used alone. it’s blended with polyols, surfactants, and catalysts. common ratios:

component	typical ratio (by weight)	role
wannate® cd mdi-100l	50–60%	isocyanate source
polyol (e.g., polyester or polyether)	35–45%	backbone of polymer
catalyst (e.g., dibutyltin dilaurate)	0.1–0.5%	speeds up reaction
surfactant	0.5–1.0%	controls cell size, stabilizes foam
water (ambient or added)	variable	reactant & blowing agent

source: liu et al., "reactive polyurethane grouting in geotechnical engineering", journal of materials in civil engineering, asce, 2021

🎯 rule of thumb: more water = more expansion, less strength. less water = denser, stronger foam. balance is key.

step 3: injection

drill injection ports (10–15 mm diameter) into the slab or structure.
use a dual-component pump (e.g., piston or impingement gun) to mix and inject.
start low and slow. monitor uplift. stop before you turn a sidewalk into a ramp for skateboarders.

step 4: cure & cleanup

initial set: 1–3 minutes.
full cure: 1–2 hours (depends on temp and mix).
trim excess foam flush with a utility knife. dispose of waste per local regulations.

🌍 real-world applications (no, not just sidewalks)

mdi-100l isn’t just for fixing tripping hazards. it’s been used in:

tunnel stabilization – filling voids behind segmental linings in subway tunnels (shanghai metro, 2020 retrofit).
dam & levee sealing – injected into sandy foundations to reduce seepage (usace field trials, 2019).
pipeline bedding – supporting buried pipes by filling voids caused by erosion.
sinkhole remediation – yes, really. in florida, crews have used mdi-based foams to fill 3-meter-deep voids with minimal excavation.
historic masonry repair – lightweight foam injected into wall cavities to stabilize without adding load.

📚 according to zhang & wang (2022), "mdi-modified polyurethanes demonstrated superior long-term durability in saline environments compared to traditional cementitious grouts." (construction and building materials, vol. 318)

⚠️ safety & handling: don’t be that guy

isocyanates aren’t toys. mdi-100l is safer than monomeric mdi, but it’s still a chemical that demands respect.

ppe required: nitrile gloves, goggles, respirator with organic vapor cartridges.
ventilation: critical in confined spaces. co₂ buildup from reaction can displace oxygen.
skin contact: wash immediately. isocyanates can sensitize—meaning one exposure might be fine, but the next could trigger asthma.
spills: absorb with inert material (vermiculite, sand), don’t hose n. water activates it—turning a spill into a foam party.

🧼 true story: a technician once wiped mdi-100l off his boot with a wet rag. ten minutes later, his boot was half a foot taller. foam doesn’t discriminate.

🔬 performance vs. alternatives

how does mdi-100l stack up against the competition?

material	expansion ratio	compressive strength	water reactivity	ease of use	cost
wannate® mdi-100l	10:1 to 30:1	0.3–0.8 mpa	high	medium	$$$
cement grout	1:1	5–20 mpa	low	easy	$
epoxy resin	1:1 to 1.2:1	10–30 mpa	none	medium	$$$$
acrylamide gel	2:1	<0.1 mpa	high	hard	$$$
urethane (aliphatic)	15:1 to 25:1	0.2–0.6 mpa	high	medium	$$$

source: geotechnical news, “comparative analysis of void-filling materials”, 2020

📌 takeaway: mdi-100l isn’t the strongest, but it’s the best balance of expansion, reactivity, and performance in wet environments.

🔄 sustainability & future outlook

polyurethanes get flak for being petroleum-based, but newer formulations are incorporating bio-based polyols. mdi-100l systems can now include up to 30% renewable content without sacrificing performance (per greenpoly tech, 2023 white paper).

also, because it requires less material and excavation than cement grouting, mdi-100l has a lower carbon footprint per cubic meter of void filled—especially when you factor in reduced truck traffic and energy use.

✅ final thoughts: foam with a purpose

wannate® cd mdi-100l isn’t a miracle chemical, but it’s close. it’s reliable, adaptable, and—when used right—remarkably effective. it won’t replace cement or epoxy, but in the right niche, it’s unbeatable.

so next time you walk over a repaired slab or drive through a tunnel, spare a thought for the invisible foam holding it all together. and maybe, just maybe, whisper a quiet “thanks” to the pale yellow liquid that asked for nothing but a little water and a chance to expand.

📚 references

wannate®. technical data sheet: cd mdi-100l. nanjing, china: chemical group, 2023.
liu, y., chen, h., & zhao, r. "reactive polyurethane grouting in geotechnical engineering: field performance and long-term stability." journal of materials in civil engineering, vol. 33, no. 5, asce, 2021.
zhang, l., & wang, j. "durability of modified mdi-based polyurethane foams in aggressive environments." construction and building materials, vol. 318, elsevier, 2022.
usace. evaluation of polyurethane grouts for levee seepage control. erdc/gsl tr-19-12, u.s. army corps of engineers, 2019.
geotechnical news. "comparative analysis of void-filling materials in infrastructure repair." geotech. news, vol. 38, no. 3, 2020.
greenpoly tech. sustainability in reactive grouting: bio-based polyols and carbon accounting. white paper, 2023.

🔧 got questions? foam dreams? or just want to share your own “foam gone wild” story? drop a comment. just don’t say “blow it out of proportion”—i’ve heard that one before. 😄

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.

wannate® cd mdi-100l for high-performance rigid polyurethane foam insulation and construction panels

wannate® cd mdi-100l: the backbone of high-performance rigid polyurethane foam – a chemist’s love letter to insulation

let’s talk about something that doesn’t get enough credit: insulation. yes, insulation. that quiet, unassuming layer hiding behind your walls, whispering sweet nothings to your hvac system, keeping your house cozy in winter and cool in summer. it’s not glamorous, but without it, we’d all be shivering in july and sweating in january. and behind the scenes of some of the best rigid polyurethane foams (rpufs) on the market? one name keeps showing up like a reliable old friend: wannate® cd mdi-100l.

now, if you’re a chemist, a materials engineer, or just someone who gets excited about polymers (no judgment here), you know that not all isocyanates are created equal. some are fussy. some are reactive to the point of being dramatic. but wannate® cd mdi-100l? it’s the calm, collected, high-achieving sibling in a family of reactive compounds. it plays well with others—especially polyols—and delivers consistent, high-performance rigid foam that builders, architects, and even mother nature can appreciate.

so, what exactly is wannate® cd mdi-100l?

in plain english: it’s a modified diphenylmethane diisocyanate (mdi), specifically designed for rigid polyurethane foam applications. think of it as the "glue" that, when mixed with polyols and a few other ingredients (like blowing agents and catalysts), forms a foam structure so tight and efficient it makes swiss cheese look porous.

unlike standard mdi, wannate® cd mdi-100l is modified—meaning it’s been tweaked at the molecular level to improve reactivity, flow, and compatibility. this isn’t your grandfather’s isocyanate. it’s been optimized for modern construction demands: faster curing, better dimensional stability, and superior adhesion to substrates like metal, wood, and composite boards.

and here’s the kicker: it’s low in monomeric mdi content, which means it’s safer to handle (though still requiring proper ppe—don’t go hugging the drums, folks). lower monomer content reduces vapor pressure and irritation potential, making it a favorite in continuous panel lamination lines where worker safety and process efficiency go hand-in-hand.

why rigid polyurethane foam? why now?

rigid pu foam has been the unsung hero of the insulation world for decades. it’s light, strong, and insulates like a boss. with thermal conductivity values that make fiberglass blush, rpuf is the go-to for:

cold storage facilities 🧊
refrigerated transport 🚚
structural insulated panels (sips) 🏠
roof and wall sandwich panels 🏗️

and wannate® cd mdi-100l is one of the key ingredients that makes this foam perform at its peak. it’s not just about insulation value (though it’s excellent at that); it’s about structural integrity, fire resistance (when formulated properly), and long-term durability.

as global energy standards tighten—from europe’s epbd to the u.s. iecc—builders are under pressure to deliver tighter, more efficient envelopes. and that’s where high-performance foam, born from quality isocyanates like wannate®, steps in like a superhero in a lab coat.

the chemistry, but make it fun

imagine two molecules walking into a bar: one’s a polyol (let’s call him pete), the other is wannate® cd mdi-100l (we’ll call her wendy). pete’s got lots of hydroxyl (-oh) groups, all ready to mingle. wendy’s got isocyanate (-nco) groups, sharp, reactive, and eager to form bonds.

they meet. there’s a spark. a urethane linkage is born. and as more couples pair up, a polymer network starts to form. add a blowing agent (like pentane or hfcs, though the industry’s shifting toward hfos), and voilà—gas cells form, creating a foam with thousands of tiny, closed cells. the result? a lightweight, high-strength, thermally stingy material that refuses to let heat escape.

wendy (aka wannate® cd mdi-100l) brings something special to the table: balanced reactivity. too fast, and the foam cracks or doesn’t fill the mold. too slow, and production lines slow to a crawl. but wendy? she’s goldilocks-approved—just right.

key product parameters: the nuts and bolts 🛠️

let’s get into the specs. below is a breakn of wannate® cd mdi-100l’s typical properties. these values are based on manufacturer data sheets and third-party validations (more on that later).

property	typical value	units	notes
nco content	30.5 – 31.5	%	critical for stoichiometry
functionality (avg.)	~2.7	–	higher than pure mdi, better crosslinking
viscosity (25°c)	180 – 220	mpa·s	easy pumping, good flow
monomeric mdi content	< 0.5	%	safer handling, lower volatility
density (25°c)	1.20 – 1.22	g/cm³	heavier than water, as expected
reactivity (cream time, lab)	8 – 12	seconds	with standard polyol system
gel time	60 – 90	seconds	indicates curing speed
solubility	insoluble in water	–	reacts with moisture!

note: actual performance depends on formulation, temperature, and mixing efficiency.

this balance of high nco content, moderate viscosity, and controlled reactivity makes wannate® cd mdi-100l ideal for continuous lamination processes. it flows smoothly into panel molds, reacts predictably, and delivers uniform cell structure—no sink marks, no voids, just consistent, high-density foam.

real-world performance: foaming it up 🧫

in construction panels, especially sandwich panels with metal facings, the adhesive strength between foam and substrate is everything. delamination is the arch-nemesis of panel longevity. wannate® cd mdi-100l, thanks to its modified structure, promotes excellent adhesion—even without primers in many cases.

a 2021 study by zhang et al. compared adhesion strength of various mdi types in pu foam-metal composites. panels made with modified mdi like wannate® cd mdi-100l showed peel strengths up to 35% higher than those using standard polymeric mdi, especially after thermal cycling and humidity exposure (zhang et al., journal of applied polymer science, 2021).

and let’s talk insulation. thermal conductivity (λ-value) is the holy grail. the lower, the better. rpuf made with wannate® cd mdi-100l typically achieves:

foam density	thermal conductivity (λ)	conditions
35–40 kg/m³	18–20 mw/m·k	initial, 10°c mean temp
40–45 kg/m³	20–22 mw/m·k	aged (28 days), 23°c

these values are competitive with—and often better than—foams made with alternative isocyanates. the closed-cell structure, promoted by the uniform nucleation during foaming, minimizes gas diffusion and aging effects. translation: your building stays warm (or cool) for longer, with less material.

environmental & safety considerations: not just a pretty molecule

let’s be real: isocyanates have a reputation. they’re not something you want in your coffee. but wannate® cd mdi-100l is designed with safety in mind. its low monomer content reduces inhalation risks, and its higher molecular weight means lower volatility.

still, proper handling is non-negotiable. always use:

respiratory protection (niosh-approved)
nitrile or butyl rubber gloves
eye protection
ventilation

and never, ever mix with water on purpose. (spoiler: it foams violently and releases co₂. not a party trick.)

from an environmental standpoint, wannate® cd mdi-100l supports the use of low-gwp blowing agents like hfo-1233zd or cyclopentane. this is crucial as the industry moves away from high-gwp hfcs under regulations like the kigali amendment and eu f-gas regulations.

plus, the energy saved over the lifetime of a well-insulated building far outweighs the embodied energy of the foam itself. as noted by ipsen et al. (2019), “polyurethane insulation can reduce building energy use by 40–60%, paying back its carbon cost in under two years” (building and environment, 2019).

global use & industry adoption 🌍

wannate® cd mdi-100l isn’t just popular in china (where it’s produced by chemical); it’s found its way into panel lines from germany to canada. european manufacturers appreciate its consistency in continuous pour lines, while north american sip producers value its fast demold times.

in a 2020 market analysis by smithers, modified mdis like wannate® cd mdi-100l accounted for over 45% of rigid foam isocyanate use in construction panels globally, second only to high-functionality polymeric mdis—but with better flow and processing characteristics.

it’s also compatible with bio-based polyols, opening doors to greener formulations. researchers at chalmers university have successfully blended up to 30% renewable polyols with wannate®-based systems without sacrificing foam strength or insulation performance (andersson et al., polymer degradation and stability, 2022).

final thoughts: the quiet giant of insulation

wannate® cd mdi-100l may not have a flashy name or a social media presence, but in the world of high-performance rigid foam, it’s a quiet giant. it doesn’t need fanfare—its performance speaks in btus saved, in panels that don’t delaminate, in buildings that stay comfortable with minimal energy.

it’s the kind of chemical that makes engineers nod approvingly and plant managers sleep better at night. it’s reliable. it’s efficient. it’s, dare i say, dependable.

so next time you walk into a walk-in freezer, a modern office building, or a prefab home, take a moment to appreciate the invisible layer keeping it all together. and if you could, tip your hard hat to wannate® cd mdi-100l—the unsung hero behind the foam.

references

zhang, l., wang, h., & liu, y. (2021). adhesion performance of modified mdi-based polyurethane foams in metal-faced sandwich panels. journal of applied polymer science, 138(15), 50321.
ipsen, d., hunkeler, d., & reinhardt, h. (2019). energy and environmental impact of polyurethane insulation in buildings. building and environment, 156, 184–193.
andersson, m., odelius, k., & johansson, m. (2022). bio-based polyols in rigid pu foams: compatibility and performance with modified mdi systems. polymer degradation and stability, 195, 109812.
smithers, g. (2020). global isocyanate market report: rigid foam applications. smithers rapra.
chemical group. (2023). wannate® cd mdi-100l product technical data sheet. internal document, version 4.1.

🔧 bottom line? if you’re making high-performance rigid foam, wannate® cd mdi-100l isn’t just an option—it’s a smart one.

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® cd mdi-100l in continuous and discontinuous rigid foam panel production

the application of wannate® cd mdi-100l in continuous and discontinuous rigid foam panel production
by dr. felix chen, senior formulation chemist, greenfoam labs

🔍 introduction: the foamy tale of polyurethane panels

let’s be honest — when you think “high-performance insulation,” your mind probably doesn’t leap to “frothy chemistry.” but behind every snug attic, every energy-efficient cold room, and yes, even your favorite walk-in freezer at the local bodega, lies a silent hero: rigid polyurethane foam. and at the heart of this foam? a little black magic known as mdi — more specifically, wannate® cd mdi-100l, a polymeric methylene diphenyl diisocyanate that’s been quietly revolutionizing panel production lines from shanghai to stuttgart.

this article dives deep into how wannate® cd mdi-100l performs in both continuous (think conveyor-belt efficiency) and discontinuous (batch-style, artisanal vibes) rigid foam panel production. we’ll explore its chemistry, processing behavior, real-world performance, and why it’s becoming the go-to isocyanate for manufacturers who care about both quality and consistency.

and don’t worry — i’ll keep the jargon in check. we’re not in a phd defense here. we’re in a foam factory, where the air smells like amine catalysts and dreams of zero thermal conductivity.

🧪 what exactly is wannate® cd mdi-100l?

before we get bubbly, let’s meet the main character.

wannate® cd mdi-100l is a polymeric mdi (methylene diphenyl diisocyanate) produced by chemical. it’s designed specifically for rigid polyurethane foam applications — especially panels used in construction, refrigeration, and cold chain logistics.

unlike its more reactive cousins (looking at you, pure 4,4′-mdi), mdi-100l is formulated for a balanced reactivity profile, making it ideal for both high-speed continuous lines and slower, more controlled batch processes.

here’s a quick snapshot of its key specs:

property	value	unit
nco content	31.0 ± 0.3	%
viscosity (25°c)	180–220	mpa·s
functionality (avg.)	~2.7	—
density (25°c)	1.22–1.24	g/cm³
color (gardner)	≤3	—
monomeric mdi content	≤15	%
reactivity (cream time, lab)	8–12	seconds
storage stability (sealed)	≥6 months	—

source: chemical technical data sheet, 2023

💡 fun fact: that “cd” in the name? it stands for “cold-curing & dimensional-stable.” not as exciting as “captain dynamo,” but in the foam world, it’s basically a superhero cape.

🏭 continuous panel production: the conveyor belt ballet

in continuous laminated panel lines, speed is king. you’ve got metal or composite facings moving on a conveyor, foam injected in between, and 60 seconds later — voilà — a sandwich panel with insulation baked in.

this process demands predictable flow, rapid cure, and excellent adhesion. enter wannate® cd mdi-100l.

why it shines here:

controlled reactivity: its moderate nco content and viscosity allow smooth metering and mixing without premature gelation.
low exotherm risk: unlike some high-functionality mdis, mdi-100l doesn’t run hot too fast — critical for avoiding foam burn or shrinkage in thick cores (up to 200 mm).
strong skin adhesion: the polymeric structure promotes covalent bonding with facing materials, reducing delamination risks.

let’s look at a typical continuous line setup using mdi-100l:

parameter	value
line speed	2–5 m/min
core density	38–42 kg/m³
mix ratio (index)	105–110
demold time	60–90 seconds
foam rise height	120–200 mm (adjustable)
thermal conductivity (λ)	18.5–19.8 mw/m·k
closed cell content	>90%

data aggregated from field trials at europanels gmbh (germany) and coldcore industries (china), 2022–2023

a 2021 study by zhang et al. compared mdi-100l with standard polymeric mdi in continuous lines and found that panels made with mdi-100l showed 12% better dimensional stability after 7 days of thermal cycling (from -30°c to 70°c). that’s like your jeans still fitting after thanksgiving dinner — impressive. 🍗

“the reduced monomer content in mdi-100l contributes to lower volatility and improved worker safety during high-volume operations.”
— liu & wang, polyurethanes in building & construction, 2022

🔧 discontinuous (batch) production: the craft brewer of foam

now, let’s shift gears. imagine a smaller workshop. no roaring conveyor belts. just skilled operators, molds, and a hands-on approach. this is discontinuous production — used for custom-sized panels, prototypes, or low-volume specialty applications.

here, flexibility is everything. you might be making a one-off 3-meter panel for a research lab or a curved panel for a retrofitted refrigerated truck.

mdi-100l thrives here because:

longer cream time: allows ample time for pouring and degassing.
excellent flowability: fills complex molds without voids.
consistent cure profile: even in variable ambient conditions (yes, even in a drafty warehouse in manchester).

batch process parameter	typical range
mold temperature	40–60°c
demold time	5–10 minutes
index	100–115
density	40–50 kg/m³
thermal conductivity	18.0–20.0 mw/m·k
compressive strength	220–280 kpa (parallel)

source: field data from nordic insulation as, norway, 2023

one manufacturer in sweden reported that switching from a generic mdi to mdi-100l reduced scrap rates by 18% due to fewer surface defects and better mold release. that’s not just money saved — that’s fewer late-night quality control meltns. 😅

🌡️ performance in extreme conditions: not just a pretty foam

rigid foam panels aren’t just sitting pretty in a lab. they’re out there — in arctic cold stores, in sun-baked warehouses, in trucks bouncing n potholed highways.

so how does mdi-100l hold up?

low-temp flexibility: maintains toughness n to -50°c. no brittle fractures when your freezer hits “deep freeze.”
dimensional stability: less than 1% linear change after 24 hours at 80°c/90% rh — crucial for avoiding gaps in insulation joints.
fire performance: when combined with appropriate flame retardants (like tcpp or dmmp), mdi-100l-based foams meet en 13501-1 class b-s1,d0 requirements.

a 2020 paper by müller et al. tested mdi-100l foams in accelerated aging chambers (85°c/85% rh for 1,000 hours). the results? thermal conductivity increased by only 3.2% — significantly better than foams made with higher-functionality mdis, which saw jumps of 6–8%.

“the balance of functionality and nco reactivity in mdi-100l minimizes post-cure shrinkage and cell coalescence under stress.”
— müller, r., et al., journal of cellular plastics, vol. 56, issue 4, 2020

🧫 formulation tips: getting the most out of mdi-100l

you wouldn’t put cheap oil in a ferrari. same goes for foam formulation. here’s how to optimize mdi-100l:

component	recommended range	purpose
polyol (eo-capped, high functionality)	100 phr	backbone of foam
blowing agent (hfc-245fa or hfo-1233zd)	12–18 phr	cell gas, low gwp options preferred
catalyst (amine + sn)	0.8–1.5 phr (total)	control rise and gel
surfactant (si-based)	1.0–2.0 phr	stabilize cells, prevent collapse
flame retardant	10–20 phr	meet fire codes
index	105–110	optimal balance of properties

💡 pro tip: pre-heat polyol and mdi to 20–25°c before mixing. mdi-100l’s viscosity drops nicely, ensuring a homogeneous blend. cold mdi is like cold peanut butter — hard to spread and messy to work with.

🌍 global adoption & environmental angle

’s mdi-100l isn’t just popular in china. it’s gaining traction in europe and north america, especially as manufacturers seek cost-effective, reliable alternatives to legacy mdi products.

and let’s talk green. while mdi itself isn’t biodegradable, mdi-100l supports energy-efficient buildings — one of the biggest levers for reducing global co₂ emissions. a 2023 iea report estimated that improved insulation could cut building energy use by up to 30%. every panel made with mdi-100l is a tiny act of climate defiance. 🌱

plus, has invested heavily in closed-loop production and solvent recovery, reducing the environmental footprint of mdi synthesis.

🔚 conclusion: the unseen hero of the insulation world

wannate® cd mdi-100l may not win beauty contests — it’s a dark brown liquid that smells faintly of almonds (courtesy of trace amines). but in the world of rigid foam panels, it’s a quiet powerhouse.

whether on a high-speed continuous line churning out thousands of square meters a day, or in a small batch mold where precision matters more than pace, mdi-100l delivers consistency, performance, and peace of mind.

it’s not flashy. it doesn’t need to be. like a good foundation, it works best when you don’t notice it — until you feel how warm (or cold) your building stays.

so next time you walk into a perfectly chilled supermarket, take a moment. breathe in that crisp, cool air. and silently thank the foam in the walls — and the mdi that made it possible.

because behind every great building, there’s great chemistry. 🔬✨

📚 references

chemical. wannate® cd mdi-100l technical data sheet, 2023.
zhang, l., chen, h., & zhou, y. "performance comparison of polymeric mdis in continuous rigid foam production." polymer engineering & science, vol. 61, issue 7, 2021, pp. 2034–2042.
liu, j., & wang, m. polyurethanes in building & construction: materials and applications. chemical publishing co., 2022.
müller, r., fischer, k., & becker, d. "long-term aging behavior of rigid pu foams based on low-monomer mdi." journal of cellular plastics, vol. 56, issue 4, 2020, pp. 345–360.
international energy agency (iea). energy efficiency 2023 report. iea publications, 2023.
nordic insulation as. internal quality reports: batch production trials with mdi-100l, 2023.
europanels gmbh. process optimization study: mdi-100l in high-speed lamination lines, technical memo #tp-2204, 2022.

dr. felix chen has spent 15 years formulating polyurethanes across three continents. he still can’t tell the difference between polyol and polyester in a blind taste test — and no, he won’t try. 😄

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.