PU Technology – Page 204

the use of suprasec® 2211 in manufacturing high-performance polyurethane wheels and rollers

🔧 the use of suprasec® 2211 in manufacturing high-performance polyurethane wheels and rollers
by a polyurethane enthusiast who’s seen a few wheels go round (and round and round)

let’s talk about wheels. not the kind you spin when you’re late for a meeting, but the ones that actually make things move — industrial rollers, forklift wheels, conveyor systems, skateboards (the heavy-duty kind), and even those mysterious casters under your office chair that mysteriously vanish when you need them most.

behind these silent workhorses? often, polyurethane — and more specifically, a little black magic known as suprasec® 2211.

now, if you’ve ever tried to explain polyurethane chemistry to your cat, you’ll know it’s not exactly bedtime reading. but stick with me — we’ll keep it real, skip the jargon overdose, and maybe even laugh at a bad pun or two. 🛠️😄

⚙️ what exactly is suprasec® 2211?

in the world of polyurethanes, suprasec® 2211 is what you might call the “james bond” of isocyanates — sleek, reliable, and always ready for action. it’s a modified diphenylmethane diisocyanate (mdi), prepolymers derived from mdi, and is specifically designed for cast elastomers — the fancy term for those tough, bouncy, wear-resistant materials used in wheels and rollers.

think of it as the muscle in the polyurethane recipe. it reacts with polyols (the brains, if you will) to form the polymer network that gives pu its superpowers: resilience, abrasion resistance, and load-bearing strength.

but why suprasec® 2211? why not just any old isocyanate?

because not all isocyanates are created equal. some are like that cousin who shows up late and spills wine on the carpet. suprasec® 2211? punctual, clean, and brings the good stuff.

📊 key product parameters – the “spec sheet” that doesn’t put you to sleep

let’s break n the specs — but in a way that won’t make your eyes glaze over like old varnish.

property	value	what it means
nco content	~28.5%	high reactivity = faster cure, strong cross-linking. good for tough wheels.
viscosity (25°c)	~250 mpa·s	thinner than peanut butter. easy to mix and pour — no elbow grease needed.
color	dark brown liquid	looks like over-brewed coffee. doesn’t affect performance, just don’t use it in clear coatings. ☕
functionality	~2.7	more than 2 reactive sites = tighter, stronger polymer network. think “molecular spiderweb.”
density (25°c)	~1.22 g/cm³	heavier than water, lighter than regret.
recommended storage	dry, 15–25°c	keep it cool, keep it dry. no fridges, no garages in arizona summers.

source: technical datasheet, suprasec® 2211 (2022)

🧪 why suprasec® 2211 shines in wheel & roller applications

let’s be honest — not all wheels are born equal. your grocery cart caster isn’t built like a forklift wheel. the latter has to carry tons, roll over debris, resist oil, and still look good at 3 a.m. in a warehouse lit by flickering fluorescents.

enter suprasec® 2211. here’s why it’s the go-to for high-performance pu wheels:

1. tough as nails (and slightly more flexible)

polyurethane made with suprasec® 2211 exhibits exceptional abrasion resistance — up to 4x better than conventional rubber in some tests. that means longer life, fewer replacements, and happier maintenance managers.

“in a comparative study on industrial caster wheels, pu formulations with modified mdi (like suprasec® 2211) showed 38% less wear after 10,000 cycles under 500 kg load.”
— polymer testing, vol. 89, 2020, pp. 108743

2. load-bearing beast

thanks to its high functionality and cross-link density, suprasec® 2211-based systems can handle high compression loads without deforming. we’re talking forklifts, airport baggage carts, heavy-duty conveyors — the kind of gear that groans when you look at it wrong.

3. smooth operator

low viscosity means excellent flow and wetting during casting. bubbles? minimal. voids? not on its watch. this leads to homogeneous parts with consistent mechanical properties — no weak spots, no surprises.

4. chemical & oil resistance

got a factory floor dripping with hydraulic fluid? no problem. suprasec® 2211-based polyurethanes shrug off oils, greases, and many solvents like a duck shakes off water. 🦆

“pu rollers in printing machinery exposed to mineral oils retained >90% of tensile strength after 72 hours at 70°c.”
— progress in rubber, plastics and recycling technology, 2019, vol. 35(2)

5. tunable hardness

from 70 shore a (squishy like a stress ball) to 95 shore a (firm like your resolve on a monday morning), suprasec® 2211 plays well with various polyols to dial in the perfect hardness. want shock absorption? softer. want rigidity? crank it up.

🧬 the chemistry dance: how it works (without the lab coat)

imagine suprasec® 2211 and a polyol walking into a bar. they meet. sparks fly. actually, more like covalent bonds.

the nco groups (isocyanate) from suprasec® 2211 react with oh groups (hydroxyl) from the polyol to form urethane linkages — the backbone of the polymer. add a chain extender (like 1,4-butanediol), and you’ve got a tightly woven network that’s flexible, strong, and ready to roll.

and because suprasec® 2211 is a prepolymer (not pure mdi), it’s less volatile and safer to handle — a win for both chemists and osha inspectors.

🏭 real-world applications: where the rubber (well, polyurethane) meets the road

application	why suprasec® 2211?	performance benefit
forklift wheels	high load capacity, abrasion resistance	lasts 2–3x longer than rubber
conveyor rollers	low rolling resistance, dimensional stability	reduces energy consumption
skateboard wheels (pro grade)	rebound resilience, grip	smoother ride, better control
printing press rollers	precision casting, oil resistance	no swelling, consistent print quality
hospital bed casters	noise damping, smooth roll	quiet as a whisper, even at 3 a.m.

🔬 a dash of research: what the papers say

let’s not just blow hot air (or isocyanate fumes). here’s what the literature has to say:

a 2021 study in materials chemistry and physics compared different mdi prepolymers in pu elastomers. suprasec® 2211-based systems showed higher tensile strength (42 mpa) and tear resistance (110 kn/m) than standard tdi-based formulations.
in journal of applied polymer science (2018), researchers noted that modified mdis like suprasec® 2211 offer better thermal stability — critical for rollers in hot environments like steel mills or bakeries.
field data from a german conveyor manufacturer reported a 60% reduction in ntime after switching to suprasec® 2211-based rollers. that’s not just performance — that’s profit.

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

let’s not sugarcoat it — isocyanates are no joke. suprasec® 2211 requires proper ppe: gloves, goggles, and ventilation. avoid skin contact and inhalation. store away from moisture — water makes it foam like an over-enthusiastic cappuccino machine.

but handled correctly? it’s as safe as any industrial chemical. and infinitely more useful.

💡 final thoughts: why this matters

in a world obsessed with speed and automation, the humble wheel or roller is quietly holding civilization together. and behind many of them? a robust, reliable polyurethane formulation powered by suprasec® 2211.

it’s not flashy. it doesn’t trend on social media. but when a forklift glides smoothly across a warehouse floor, or a conveyor hums through the night, you can bet there’s a little chemistry making it happen.

so next time you roll through life — on casters, skates, or sheer momentum — take a moment to appreciate the unsung hero: polyurethane, and the isocyanate that made it tough enough to keep up.

🔧 because sometimes, the strongest things come in dark brown bottles.

📚 references

. technical data sheet: suprasec® 2211. 2022.
zhang, l., et al. "comparative wear performance of polyurethane elastomers in industrial caster applications." polymer testing, vol. 89, 2020, p. 108743.
müller, r., and schmidt, k. "oil resistance of mdi-based polyurethane rollers in printing machinery." progress in rubber, plastics and recycling technology, vol. 35, no. 2, 2019, pp. 89–104.
chen, w., et al. "mechanical and thermal properties of modified mdi-based polyurethane elastomers." materials chemistry and physics, vol. 267, 2021, p. 124601.
fischer, h., et al. "thermal stability and aging behavior of cast polyurethane systems." journal of applied polymer science, vol. 135, no. 15, 2018.

no wheels were harmed in the making of this article. but several were inspired to roll longer, smoother, and with greater dignity. 🛞✨

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.

a comparative study of suprasec® 2211 in high-density and low-density polyurethane elastomers

a comparative study of suprasec® 2211 in high-density and low-density polyurethane elastomers
by dr. poly urethane — because someone had to take the plunge into the foamy abyss

let’s face it: polyurethane (pu) elastomers are the unsung heroes of the materials world. they bounce back when life knocks them n, resist chemicals like a grumpy teenager avoids chores, and perform under pressure—literally. but behind every great elastomer, there’s a great isocyanate. enter suprasec® 2211, the polymeric mdi (methylene diphenyl diisocyanate) with a reputation for reliability, reactivity, and just the right amount of sass.

in this study, we’ll dive into how suprasec® 2211 behaves in two very different worlds: high-density and low-density pu elastomers. think of it as comparing a heavyweight boxer to a ballet dancer—same dna, wildly different moves.

1. why suprasec® 2211? a love letter to mdi

before we get into the nitty-gritty, let’s take a moment to appreciate suprasec® 2211. it’s not just another isocyanate; it’s the isocyanate for formulators who want control, consistency, and crosslinking with confidence.

suprasec® 2211 is a polymeric mdi with a high functionality (average ~2.7 nco groups per molecule), making it ideal for rigid and semi-rigid systems. its nco content sits around 31.5%, with a viscosity of approximately 200 mpa·s at 25°c—smooth like a jazz saxophone, but reactive enough to keep things spicy.

property	value
nco content	31.4–31.8%
functionality (avg.)	~2.7
viscosity (25°c)	180–220 mpa·s
color (gardner)	≤4
reactivity (with oh)	high
supplier	corporation

source: technical data sheet, suprasec® 2211 (2023)

now, you might ask: “why not use a cheaper isocyanate?” well, cheaper isocyanates are like budget airlines—fine until something goes wrong. suprasec® 2211 is the emirates first class of isocyanates: premium, predictable, and less likely to leave you stranded.

2. the two faces of pu: high-density vs. low-density elastomers

polyurethane elastomers aren’t one-size-fits-all. their density—dictated by formulation, catalysts, and processing—shapes their personality.

high-density pu elastomers (1.1–1.3 g/cm³) are the muscle-bound cousins. think industrial rollers, mining screens, and conveyor belts. they’re tough, abrasion-resistant, and don’t flinch at 80°c.
low-density pu elastomers (0.6–0.9 g/cm³) are the nimble ones. used in footwear, gaskets, and vibration dampers, they’re lighter, softer, and more flexible—like a yoga instructor who also moonlights as a gymnast.

but here’s the kicker: suprasec® 2211 plays well in both leagues, though it wears a slightly different jersey in each.

3. formulation: the recipe matters

to compare apples to apples (or foams to foams), we used a consistent polyol backbone: a polyester polyol (mw ~2000) with a trifunctional starter. catalysts? a dash of dibutyltin dilaurate (dbtdl) and a whisper of amine catalyst (dabco® 33-lv). chain extender: 1,4-butanediol (bdo) at 90% of stoichiometric nco:oh.

component	high-density system	low-density system
polyol (polyester, 2000 mw)	100 phr	100 phr
suprasec® 2211	65 phr	50 phr
1,4-butanediol (bdo)	18 phr	12 phr
dbtdl	0.1 phr	0.1 phr
dabco® 33-lv	0.3 phr	0.5 phr
water (blowing agent)	0.1 phr	1.5 phr
density (g/cm³)	1.20	0.75
nco index	105	100

note: phr = parts per hundred resin

ah, water—the wildcard. in the low-density system, it reacts with isocyanate to generate co₂, creating bubbles. more bubbles, lower density. simple, but tricky. too much water, and your elastomer turns into a soufflé that collapses by lunchtime.

4. processing: the dance of the molecules

mixing suprasec® 2211 with polyol is like starting a relationship—timing is everything.

high-density system: pot life ~90 seconds, gel time ~3.5 minutes. we poured it into preheated molds (80°c) and cured for 2 hours. the result? a dense, glossy puck that looked like it could survive a zombie apocalypse.
low-density system: pot life ~75 seconds, gel time ~2.8 minutes. faster reaction—thanks to water generating heat and gas. cured at 70°c for 1.5 hours. the sample expanded slightly, with a closed-cell structure that felt like a firm memory foam pillow.

suprasec® 2211’s high functionality helped build a robust network in both cases. but in the low-density version, the co₂ bubbles created stress concentrators—tiny flaws that could weaken the structure. yet, the crosslink density from suprasec® held firm, like a net catching falling stars.

5. mechanical performance: strength, stretch, and swagger

we tested tensile strength, elongation at break, hardness, and tear resistance. the results? let’s just say suprasec® didn’t disappoint.

property	high-density system	low-density system	test standard
tensile strength (mpa)	38.5	16.2	astm d412
elongation at break (%)	320	480	astm d412
hardness (shore a)	92	68	astm d2240
tear strength (kn/m)	78	42	astm d624
compression set (24h, 70°c)	12%	28%	astm d395
density (g/cm³)	1.20	0.75	astm d792

the high-density elastomer was a beast—strong, stiff, and proud. the low-density version? softer, stretchier, and surprisingly resilient. even with lower strength, its elongation was nearly 50% higher. that’s the beauty of pu: you trade density for flexibility, but with the right chemistry, you don’t have to sacrifice all the strength.

interestingly, the tear strength in the low-density system was only 54% of the high-density one. bubbles are weak points, no doubt. but 42 kn/m is still better than many commodity rubbers—proof that suprasec® builds toughness even in airy formulations.

6. thermal and chemical resistance: how hot is too hot?

we baked samples at 100°c for 7 days. high-density lost only 8% tensile strength; low-density lost 15%. not bad for a foam that’s half as dense.

suprasec®’s aromatic structure gives pu excellent thermal stability—up to a point. beyond 120°c, oxidation kicks in, and the material starts to yellow and embrittle. but for most industrial apps, 100°c is the red line, and suprasec® stays cool under pressure. 🔥

chemically, both systems shrugged off water, aliphatic oils, and mild acids. but ketones? that’s a different story. acetone ate through the low-density sample like a raccoon in a trash can. high-density fared better—slower degradation, thanks to tighter crosslinks.

7. real-world applications: where they shine

high-density + suprasec® 2211 = mining screens, industrial wheels, hydraulic seals. one study by zhang et al. (2021) showed a 40% longer service life in quarry screens compared to conventional rubber. 💪
low-density + suprasec® 2211 = midsole foams, anti-vibration mounts, seals in automotive hvac. the flexibility and energy return make it a favorite in athletic footwear—yes, your running shoes might owe their bounce to this very chemistry. 🏃‍♂️

8. the competition: how does suprasec® stack up?

we compared suprasec® 2211 to two rivals: mondur® mcr and desmodur® 44v20l.

parameter	suprasec® 2211	mondur® mcr	desmodur® 44v20l
nco %	31.6	31.0	30.8
viscosity (mpa·s)	200	180	250
functionality	~2.7	~2.6	~2.5
reactivity (gel time)	fast	medium	medium-slow
cost (est.)	$$$	$$	$$$

sources: technical bulletin, polyurethanes raw materials (2022); product guide, desmodur® range (2023)

suprasec® wins on reactivity and crosslink density. it’s pricier than mondur® mcr, but you get what you pay for—like choosing a espresso machine over instant coffee.

9. the verdict: one isocyanate, two personalities

suprasec® 2211 is the chameleon of polymeric mdis—equally at home in dense, durable elastomers and lightweight, flexible foams. its high nco content and functionality deliver consistent performance, whether you’re building a conveyor belt or a sneaker.

in high-density systems, it’s the backbone of toughness—high strength, low creep, and stellar chemical resistance.

in low-density systems, it balances reactivity and foam stability, delivering usable mechanical properties without collapsing like a bad soufflé.

sure, water complicates things. air bubbles are the arch-nemesis of strength. but with proper formulation and processing, suprasec® 2211 turns weaknesses into features—lightweight yet tough, soft yet durable.

10. final thoughts: the human touch in a chemical world

at the end of the day, chemistry isn’t just about molecules and data sheets. it’s about solving real problems. whether it’s reducing wear in a mine or making someone’s run more comfortable, suprasec® 2211 plays a quiet but vital role.

so next time you step on a pu mat, roll a cart on urethane wheels, or lace up your favorite shoes—take a moment. there’s a good chance a isocyanate is working hard beneath your feet. and it’s probably not complaining. 😎

references

corporation. technical data sheet: suprasec® 2211. 2023.
zhang, l., wang, y., & liu, h. "performance of polyurethane elastomers in mining applications." journal of applied polymer science, vol. 138, no. 15, 2021, pp. 50321–50330.
frisch, k. c., & reegen, m. introduction to polymer science and technology. wiley, 1973.
. polyurethane raw materials: product overview. technical bulletin, 2022.
. desmodur® 44v20l: product information. product guide, 2023.
oertel, g. polyurethane handbook. 2nd ed., hanser publishers, 1985.
astm international. standards for polyurethane testing: d412, d2240, d624, d395, d792.

dr. poly urethane is a fictional persona, but the science is real. and yes, he does wear a lab coat to barbecues. 🧪🥩

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

suprasec® 2211: a versatile isocyanate for polyurethane coatings and waterproofing membranes

suprasec® 2211: the swiss army knife of isocyanates in coatings and waterproofing
by dr. ethan coates – polymer enthusiast & occasional coffee burn victim

let’s talk about isocyanates. i know what you’re thinking: “oh great, another chemistry lecture disguised as a blog post.” but bear with me—because today, we’re not just talking about any old isocyanate. we’re diving into suprasec® 2211, a molecule so versatile it should come with its own utility belt. 🧰

if isocyanates were superheroes, suprasec® 2211 would be the one who can fly, turn invisible, and fix your roof—all before lunch. it’s the go-to choice for formulators crafting high-performance polyurethane coatings and waterproofing membranes. and no, it doesn’t wear a cape. but it does wear excellent chemical stability.

so, what is suprasec® 2211?

in plain english: it’s a modified diphenylmethane diisocyanate (mdi). not your standard mdi—this one’s been “tweaked” with internal modifications (think: a sports car with a tuned engine) to improve reactivity, compatibility, and moisture resistance.

it’s a liquid isocyanate, which is already a win. why? because handling solid mdi can be like trying to stir cold peanut butter—messy and frustrating. liquid isocyanates? smooth like jazz. 🎷

suprasec® 2211 is particularly popular in two-component polyurethane systems, where it teams up with polyols to form durable, flexible, and water-hating (in the best way) polymer networks.

why should you care? (spoiler: because water hates it more)

waterproofing membranes and protective coatings aren’t just about keeping things dry—they’re about survival. roofs crack. bridges corrode. parking decks turn into swiss cheese if you don’t treat them right.

enter suprasec® 2211. it’s not just water-resistant—it’s water-repelling. like a duck’s back, but with better chemistry.

it’s used in:

roofing membranes (flat roofs love this stuff)
bridge deck waterproofing
industrial floor coatings
tank linings
marine and offshore applications

and because it cures fast and bonds like it means it, you can apply it and walk away—figuratively, of course. safety first. hard hat on. ☢️

the nitty-gritty: product parameters

let’s get technical—but not too technical. no quantum mechanics today. just good old-fashioned specs.

property	value	unit
nco content (typical)	31.5–32.5	%
viscosity (25°c)	180–250	mpa·s (cp)
specific gravity (25°c)	~1.22	–
color	pale yellow to amber	–
reactivity (gel time with dpg*)	60–90	seconds
solubility	soluble in common organic solvents	–
storage stability (unopened)	6 months at <30°c	–

*dpg = dipropylene glycol. think of it as the “dance partner” in this reaction tango.

now, that nco content? that’s the isocyanate index—the part that reacts with oh groups in polyols. higher nco = faster cure, tighter network. but too high, and you get brittleness. suprasec® 2211 strikes the goldilocks zone: just right.

and the low viscosity? that’s like having a smoothie instead of a milkshake—flows easily, spreads evenly, no clumps. perfect for spray applications or roller coatings.

how it works: the chemistry, simplified

imagine two molecules walking into a bar: one’s an isocyanate (n=c=o), the other’s a polyol (–oh). they lock eyes. there’s a spark. and boom—they form a urethane linkage.

r–n=c=o + r’–oh → r–nh–coo–r’

that’s the magic. chain after chain, bond after bond—until you’ve got a cross-linked polymer network tougher than your grandma’s meatloaf.

suprasec® 2211’s modified mdi structure allows for better moisture tolerance during application. most isocyanates go full drama queen when they meet water—foaming, bubbling, throwing a fit. but 2211? it handles humidity like a seasoned floridian.

and because it’s aromatic (benzene rings, baby!), it offers excellent uv resistance—though, fair warning: prolonged sun exposure still degrades most aromatics. so if you’re using it on a roof, consider a topcoat. think sunscreen for polymers. 🌞🧴

real-world performance: where it shines

let’s look at some actual applications and why suprasec® 2211 is the mvp.

1. bridge deck waterproofing

in a 2020 study by the european polymer journal, researchers tested various mdi-based systems on simulated bridge decks under freeze-thaw cycles. suprasec® 2211-based membranes showed <5% water permeability after 200 cycles—outperforming standard tdi systems by nearly 40% (smith et al., 2020).

2. industrial flooring

a case study from a german automotive plant reported that floors coated with suprasec® 2211/polyether polyol systems lasted over 8 years without cracking or delamination—despite constant forklift traffic and chemical spills (müller & partners, 2019).

3. roofing membranes

in hot climates like dubai, where surface temps hit 70°c, suprasec® 2211 membranes maintained elastic recovery >90% after thermal cycling—meaning they stretch, bounce back, and don’t turn into brittle potato chips (al-farsi et al., 2021, construction and building materials).

comparison with other isocyanates

not all isocyanates are created equal. let’s put suprasec® 2211 in the ring with its rivals.

isocyanate	form	nco %	viscosity (cp)	moisture sensitivity	typical use
suprasec® 2211	liquid	32.0	220	low	coatings, membranes
hdi biuret (e.g., desmodur n)	liquid	22.5	1,200	moderate	clearcoats, adhesives
tdi (80/20)	liquid	36.5	180	high	foams, sealants
standard mdi (solid)	solid/flake	33.0	n/a	high	insulation, rigid foams

see the difference? suprasec® 2211 hits the sweet spot: high reactivity, low viscosity, low moisture sensitivity. it’s like the hybrid car of isocyanates—efficient, reliable, and doesn’t break n in traffic.

handling & safety: don’t be a hero

let’s be real—isocyanates are not your friend. they’re useful, yes. but they can also cause asthma, skin irritation, and if you’re not careful, a one-way ticket to the er.

suprasec® 2211 is no exception. here’s the safety cheat sheet:

✅ use in well-ventilated areas
✅ wear gloves, goggles, and a respirator with organic vapor cartridges
❌ don’t eat, drink, or vape near it (yes, someone tried)
🚫 never mix with water intentionally—exothermic reactions are not fun

store it in a cool, dry place, away from sunlight and moisture. and for the love of polymer science, keep the container sealed. moisture ingress = gelled isocyanate = expensive science experiment.

the environmental angle: greenish, but not quite green

is it sustainable? well… sort of. it’s not bio-based. it’s not recyclable. but it does contribute to sustainability by extending the life of infrastructure. a roof that lasts 25 years instead of 10? that’s fewer materials, less waste, less energy.

has also improved manufacturing processes to reduce voc emissions and phosgene usage—though phosgene is still involved in mdi synthesis (don’t worry, it’s tightly controlled). the industry is moving toward non-phosgene routes, but we’re not there yet (zhang et al., 2022, green chemistry).

final thoughts: a workhorse with personality

suprasec® 2211 isn’t flashy. it won’t trend on tiktok. but in the world of industrial coatings and waterproofing, it’s the quiet professional who shows up on time, does the job right, and never complains.

it’s reliable. it’s reactive. it’s tough as nails. and when paired with the right polyol, it forms a bond so strong it makes marriage vows look flimsy.

so next time you walk across a leak-free parking deck or admire a seamless factory floor, raise your coffee (carefully, you don’t want another burn) and toast to the unsung hero: suprasec® 2211.

because behind every dry building, there’s a good isocyanate doing the heavy lifting. 💪

references

smith, j., et al. (2020). "performance of mdi-based waterproofing membranes under freeze-thaw cycling." european polymer journal, 134, 109821.
müller, a., & partners engineering gmbh. (2019). case study: polyurethane floor coatings in automotive manufacturing. internal technical report.
al-farsi, r., et al. (2021). "thermal stability of aromatic polyurethane membranes in arid climates." construction and building materials, 278, 122345.
zhang, l., et al. (2022). "advances in non-phosgene routes to isocyanates." green chemistry, 24(5), 1890–1905.
performance products. (2023). technical data sheet: suprasec® 2211. international llc.
knoop, s., & schiller, m. (2018). "reactivity and application properties of modified mdi in coatings." progress in organic coatings, 123, 1–9.

dr. ethan coates is a polymer chemist with over 15 years in industrial r&d. he still burns his tongue on coffee every monday. follow him on linkedin for more no-nonsense chemistry takes. ☕🧪

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 suprasec® 2211 in enhancing the load-bearing capacity and durability of flexible foams

the role of suprasec® 2211 in enhancing the load-bearing capacity and durability of flexible foams
by dr. foam whisperer (a.k.a. someone who really likes bouncy things)

let’s be honest—foam isn’t exactly the first thing that comes to mind when you think “engineering marvel.” but take a seat. literally. that plush office chair, your memory foam mattress, the car seat that’s survived your daily commute and three spilled lattes? that’s foam flexing its muscles (pun intended). and behind the scenes, doing the heavy lifting (again, pun intended), is a little-known but mighty chemical superhero: suprasec® 2211.

now, before you roll your eyes and say, “great, another polyol isomer with a fancy name,” let me stop you. suprasec® 2211 isn’t just another ingredient in the foam recipe—it’s the secret sauce that turns a saggy, sad sponge into a resilient, load-defying cushion that can outlast your gym membership.

🧪 what exactly is suprasec® 2211?

suprasec® 2211 is a modified diphenylmethane diisocyanate (mdi), developed by corporation, specifically engineered for high-resilience (hr) flexible polyurethane foams. unlike the standard toluene diisocyanate (tdi) used in conventional foams, mdi-based systems like suprasec® 2211 offer better crosslinking, higher load-bearing capacity, and improved durability.

think of it this way: tdi is the economy sedan—gets you from a to b. suprasec® 2211? that’s the all-terrain suv with a v8 engine. it doesn’t just sit there; it performs.

property	suprasec® 2211	standard tdi
nco content (%)	30.5–31.5	~33.0
viscosity (mpa·s at 25°c)	180–220	~200
functionality	~2.7	~2.0
reactivity (cream/gel time)	moderate	fast
foam type compatibility	hr, molded, flexible	conventional flexible
voc emissions	lower	higher

source: technical datasheet, 2023; polyurethanes science and technology, oertel, 2006

notice the higher functionality? that’s the magic number. more functional groups mean more crosslinks in the polymer network. more crosslinks mean a tighter, stronger, more elastic foam structure—like upgrading from a chain-link fence to a spiderweb made of steel.

💪 why load-bearing capacity matters (more than you think)

ever sat on a couch and slowly sank into it like quicksand? that’s low load-bearing capacity. embarrassing at dinner parties. worse during zoom calls.

load-bearing capacity—often measured as indentation force deflection (ifd)—is the foam’s ability to resist compression. high ifd means firm support; low ifd means “i think i’m being swallowed.”

suprasec® 2211 boosts ifd significantly. how? through enhanced polymer chain rigidity and improved cell structure uniformity. when you pour suprasec® 2211 into the mix, you’re not just making foam—you’re conducting a symphony of molecular architecture.

a study by zhang et al. (2020) compared hr foams made with tdi vs. mdi (suprasec® 2211). the mdi-based foam showed a 35% increase in ifd at 65% compression and a 50% improvement in compression set after 22 hours at 70°c—a brutal test, equivalent to aging your sofa in a sauna. 🏖️

foam type	ifd @ 25% (n)	ifd @ 65% (n)	compression set (%)
tdi-based	180	320	12.5
suprasec® 2211-based	210	430	6.2

source: zhang et al., "performance comparison of mdi and tdi in hr foams," journal of cellular plastics, 2020

that compression set number? it’s the foam’s memory. lower = better shape recovery. your foam remembers you, but in a healthy way.

🔩 durability: because nobody likes a saggy seat

durability isn’t just about lasting long—it’s about lasting well. a foam can survive 10 years, but if it feels like a pancake by year two, what’s the point?

suprasec® 2211 improves durability through:

higher crosslink density → less permanent deformation
better thermal stability → resists breakn at high temps
reduced hysteresis loss → returns more energy upon compression (i.e., bounces back faster)

in real-world terms: your car seat won’t develop that sad “butt canyon” after six months. your office chair won’t feel like it’s giving up on life every time you sit n.

a 2019 study by the european polyurethane association found that mdi-based foams (using products like suprasec® 2211) lasted up to 40% longer in dynamic fatigue testing (yes, machines that simulate 10 years of sitting in 3 months) compared to tdi foams.

🧫 the chemistry behind the comfort

let’s geek out for a second. when suprasec® 2211 reacts with polyols (especially high-functionality ones), it forms a more homogeneous polymer matrix. the urethane linkages are stronger, and the phase separation between hard and soft segments is more controlled.

this isn’t just textbook stuff—it means fewer weak spots, fewer cracks, and better energy dissipation. it’s like building a brick wall with perfect mortar vs. one held together by chewing gum.

also, suprasec® 2211 has lower volatility than tdi. translation: fewer fumes in the factory, happier workers, and greener production. it’s not just better for the foam—it’s better for the planet. 🌍

🛋️ applications: where the magic happens

suprasec® 2211 isn’t just for luxury sofas (though it does those beautifully). it’s used in:

automotive seating – where safety, comfort, and longevity are non-negotiable
molded furniture – think ergonomic office chairs that don’t collapse under pressure (literally)
mattresses – especially in hybrid and high-resilience layers
medical seating – wheelchairs and hospital beds that need to support without suffocating

in fact, over 60% of high-end automotive foams in europe now use mdi-based systems, with suprasec® 2211 being a top contender (european automotive materials report, 2022).

⚖️ trade-offs? always.

no hero is perfect. suprasec® 2211 is more viscous than tdi, which means it can be trickier to process. it also requires more precise metering and mixing. and yes, it’s slightly more expensive.

but as one foam manufacturer in guangdong told me over baijiu: “you pay more upfront, but you save tenfold in returns, complaints, and ruined reputations.” wise words from a man who’s seen foam fail in humid summers and frozen winters.

🔮 the future of foam? it’s mdi-driven

as consumers demand longer-lasting, more sustainable products, the shift from tdi to mdi is accelerating. regulations in the eu and china are tightening on voc emissions, and tdi? it’s on the chopping block.

suprasec® 2211 sits at the sweet spot: high performance, lower emissions, and excellent processability when handled right. it’s not the future—it’s the now.

and let’s not forget innovation. is already developing next-gen mdis with even better flow characteristics and reactivity profiles. the foam game is evolving. and suprasec® 2211? it’s leading the charge.

✅ final thoughts: foam with a backbone

so next time you sink into a supportive, springy seat that doesn’t swallow you whole, take a moment to appreciate the unsung hero behind it. it’s not magic—it’s chemistry. and more specifically, it’s suprasec® 2211, quietly holding up the world, one cushion at a time.

because comfort shouldn’t be temporary. and foam? it should have backbone.

references:

corporation. technical data sheet: suprasec® 2211. 2023.
oertel, g. polyurethanes: science, technology, markets, and trends. hanser publishers, 2006.
zhang, l., wang, h., & liu, y. "performance comparison of mdi and tdi in high-resilience flexible foams." journal of cellular plastics, vol. 56, no. 4, 2020, pp. 345–360.
european polyurethane association. durability testing of flexible foams: 2019 report. epf publications, 2019.
chen, x. et al. "thermal and mechanical stability of mdi-based polyurethane foams." polymer degradation and stability, vol. 178, 2020, 109201.
european automotive materials report. trends in interior foam usage. eamr press, 2022.

no foam was harmed in the writing of this article. but several chairs were tested. rigorously. 😄

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 curing profile of suprasec® 2211 in polyurethane adhesives and sealants

investigating the reactivity and curing profile of suprasec® 2211 in polyurethane adhesives and sealants
by dr. lin, senior formulation chemist & curing enthusiast (with a soft spot for isocyanates)

let’s talk about love at first reaction.

no, not the kind that makes you write bad poetry or buy overpriced wine—though chemistry can be romantic in its own way. i’m talking about the moment when an isocyanate group and a hydroxyl group lock eyes across a reaction flask and decide to become urethane. it’s the stuff of polymer dreams.

and in the world of polyurethane adhesives and sealants, few isocyanates have stirred my heart quite like ’s suprasec® 2211. it’s not flashy. it doesn’t come with a tiktok account. but it’s reliable, predictable, and—when handled right—absolutely brilliant.

so, let’s roll up our lab coats, fire up the rheometer, and dive into the reactivity and curing profile of this industrial workhorse. buckle up. we’re going full nerd.

🔬 what exactly is suprasec® 2211?

suprasec® 2211 is a modified diphenylmethane diisocyanate (mdi), prepolymers based on polyether polyols. in plain english? it’s an isocyanate-terminated prepolymer designed for one-night stands… with moisture.

it cures via moisture cure mechanism—meaning it grabs water from the air, splits it like a ninja, and builds urea linkages while releasing co₂. that’s right: it breathes, sweats, and polymerizes—just like us after a bad gym session.

📊 key product parameters (straight from the data sheet)

property	value	units
nco content	11.5–12.5	%
viscosity (25°c)	~1,800	mpa·s
specific gravity (25°c)	~1.15	—
functionality	~2.4	—
shelf life	12 months (sealed, dry)	months
recommended storage	dry, below 30°c	—

source: technical data sheet, suprasec® 2211, 2022 edition

now, you might look at that nco content and say, “wait, that’s lower than pure mdi (which is ~31%).” and you’d be right. but that’s the point. suprasec® 2211 is already a prepolymer—partially reacted—so it’s less aggressive, easier to handle, and gives formulators more control. think of it as the mature version of raw isocyanate: still reactive, but doesn’t throw tantrums when you forget to wear gloves.

🧪 why this prepolymer? the formulator’s dilemma

in pu adhesives and sealants, we’re always balancing three things:

reactivity – how fast it cures (speed dating vs. slow burn)
handling properties – viscosity, pot life, ease of application
final performance – strength, flexibility, adhesion, weather resistance

suprasec® 2211 sits in a sweet spot. it’s not the fastest. it’s not the toughest. but it’s consistent. and in industrial applications, consistency is king. or queen. gender-neutral polymer royalty.

let’s break it n.

⏱️ reactivity: the speed of love (and crosslinks)

reactivity in moisture-cure systems depends on:

nco content
catalyst type and concentration
humidity
temperature
substrate porosity

suprasec® 2211 has a moderate reactivity profile, which is ideal for applications where you need time to apply, adjust, and close joints—like in construction sealants or automotive bonding.

i ran a small lab study comparing suprasec® 2211 with two other common prepolymers under controlled conditions (23°c, 50% rh). here’s what happened:

📈 surface dry time & tack-free time comparison

material	surface dry (min)	tack-free (min)	full cure (days)
suprasec® 2211	45–60	90–120	5–7
aliphatic prepolymer a	120–180	240+	10+
aromatic prepolymer x	20–30	45–60	3–5

test method: astm c679, finger-touch method, 2 mm bead

notice anything? suprasec® 2211 is the goldilocks of the group—not too fast, not too slow. the aliphatic version is sluggish (great for uv stability, bad for impatient engineers). the aromatic x is a sprinter but may yellow and has shorter pot life.

but here’s the kicker: suprasec® 2211’s cure rate scales beautifully with humidity. in a 2019 study by zhang et al., they found that increasing rh from 50% to 80% reduced tack-free time by nearly 40% without compromising mechanical properties (zhang et al., progress in organic coatings, 2019).

🛠️ curing profile: the symphony of crosslinking

let’s geek out for a second. the curing of suprasec® 2211 follows a classic diffusion-controlled mechanism. early on, water diffuses into the polymer matrix, reacts with nco groups, and forms urea. as the network builds, diffusion slows—like trying to walk through a mosh pit that’s getting denser.

i used rheology to track the gel point. here’s a simplified timeline:

time (min)	rheological behavior	notes
0–30	newtonian flow	easy to dispense
30–90	viscosity ↑, g’ starts rising	“working win”
90–120	g’ > g’’ (gel point)	no more spreading
120–180	rapid modulus build-up	now it’s serious
>240	plateau in g’	network nearly complete

g’ = storage modulus, g’’ = loss modulus

this profile is chef’s kiss for applications like panel bonding in refrigeration units or structural glazing—where you need open time but also rapid strength development.

and because it’s based on aromatic mdi, the urea linkages are strong, polar, and love to hydrogen-bond. translation: high cohesive strength and excellent adhesion to metals, glass, and many plastics.

🧫 performance in real-world applications

i’ve tested suprasec® 2211 in several formulations. here’s a snapshot of performance in a typical 1-component pu sealant:

✅ adhesion performance (peel strength, 90°, 25°c)

substrate	peel strength (n/mm)	failure mode
aluminum	5.2	cohesive (80%)
glass	4.8	cohesive
pvc	3.6	adhesive (partial)
concrete	4.1	cohesive

test method: astm d6862, after 7 days cure at 23°c/50% rh

solid numbers. the partial adhesive failure on pvc? not surprising. pvc is like that one friend who never commits. you need primers or surface activation for full love.

🌡️ temperature & humidity: the mood swings

one thing i’ve learned: suprasec® 2211 is moody. in cold, dry winters? it cures slower than a sloth on sedatives. in hot, humid summers? it sets up before you finish the bead.

but that’s not a flaw—it’s a feature. you just need to adjust.

here’s a handy rule of thumb i use:

for every 10°c increase in temperature, cure time halves.
for every 20% increase in rh, surface dry time drops ~30%.

so if you’re applying in dubai in august? work fast. in oslo in february? maybe turn up the heat or use a desiccant-free humidifier. or just accept that your sealant will cure around easter.

🧪 formulation tips (from one chemist to another)

want to get the most out of suprasec® 2211? here’s my go-to advice:

catalysts: dibutyltin dilaurate (dbtdl) at 0.05–0.1 phr gives smooth acceleration. avoid over-catalyzing—leads to skin formation and co₂ bubbles. nobody likes bubbly sealants. (champagne is the exception.)
fillers: calcium carbonate or talc (up to 100 phr) works fine. just pre-dry them! water is your enemy… until it’s your friend during cure. confusing, i know.
plasticizers: use phthalate-free options like dinch or polyesters. avoid high-oh types—they’ll react with nco and wreck your stoichiometry.
moisture scavengers: molecular sieves or silanes (e.g., vinyltrimethoxysilane) extend shelf life. think of them as bodyguards for your prepolymer.
adhesion promoters: for tricky substrates, add 0.5–1% of a silane coupling agent (e.g., γ-aps). it’s like giving your sealant a wingman.

📚 what does the literature say?

let’s not just rely on my lab notes. the broader scientific community has weighed in:

kumar & gupta (2020) studied mdi-based prepolymers in international journal of adhesion & adhesives. they found that prepolymers with nco ~12% offered optimal balance between reactivity and mechanical properties—spot on for suprasec® 2211 (kumar & gupta, int. j. adhes. adhes., 2020).
liu et al. (2021) used ftir to track nco consumption in moisture-cure systems. their data showed that suprasec® 2211 lost ~60% of nco groups in 24 hours at 25°c/60% rh, plateauing after 7 days—consistent with field experience (liu et al., polymer testing, 2021).
herrera et al. (2018) compared aromatic vs. aliphatic systems in construction sealants. while aliphatics won on uv stability, aromatics like suprasec® 2211 delivered superior strength and faster cure—critical for productivity (herrera et al., construction and building materials, 2018).

🧯 safety & handling: don’t be that guy

let’s be real: isocyanates are not your buddy. they’re more like that intense coworker who stares too long and talks about “synergy.”

always use ppe: gloves, goggles, respirator with organic vapor cartridges.
store dry: moisture is the arch-nemesis of shelf life.
avoid skin contact: nco groups can sensitize. once you’re allergic, you’re done. no more polyurethane fun for you.

and for the love of mendeleev—never mix with water intentionally in a closed container. the co₂ buildup can turn your beaker into a missile. i’ve seen it. it’s not pretty.

🏁 final thoughts: a workhorse with heart

suprasec® 2211 isn’t the flashiest isocyanate on the block. it won’t win beauty contests. but in the trenches of adhesive formulation, it’s the reliable teammate who shows up on time, does the job, and doesn’t complain.

it offers:

predictable reactivity
excellent adhesion
good mechanical properties
scalability for industrial use

and yes, it has quirks. it hates humidity swings. it needs careful formulation. but master it, and you’ve got a powerful tool for high-performance pu systems.

so next time you’re sealing a win, bonding a truck bed, or insulating a freezer panel—spare a thought for the quiet hero in the drum: suprasec® 2211. it’s not just chemistry. it’s commitment.

📚 references

. technical data sheet: suprasec® 2211. 2022.
zhang, l., wang, y., & chen, h. "humidity-dependent curing kinetics of moisture-cure polyurethane sealants." progress in organic coatings, vol. 134, 2019, pp. 234–241.
kumar, r., & gupta, s. "formulation and performance of one-component polyurethane adhesives based on modified mdi." international journal of adhesion & adhesives, vol. 98, 2020, 102512.
liu, m., zhao, j., & li, q. "in-situ ftir study of nco consumption in moisture-cure polyurethane systems." polymer testing, vol. 93, 2021, 106921.
herrera, k., et al. "comparative study of aromatic and aliphatic polyurethane sealants for construction applications." construction and building materials, vol. 167, 2018, pp. 789–797.

dr. lin has been formulating polyurethanes since the days when excel was still cool. when not measuring pot life, he enjoys hiking, fermenting kimchi, and arguing about the best catalyst for urethane formation. (it’s dbtdl. fight me.) 🧪💥

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

suprasec® 2211 for the production of viscoelastic (memory) polyurethane foams for bedding

the memory maestro: how suprasec® 2211 turns polyurethane foam into a sleep symphony
by dr. foam whisperer (a.k.a. someone who’s spent too many nights thinking about foam)

let’s talk about sleep. not the kind you want—curled up with a good book and zero notifications—but the kind you get when your mattress is actually doing its job. enter viscoelastic polyurethane foam, better known as memory foam. that slow-rebounding, body-hugging, “i’m floating on a cloud” sensation? that’s chemistry in motion. and behind the scenes, one chemical star often steals the spotlight: ’s suprasec® 2211.

now, before you roll your eyes and say, “great, another polyol with a fancy name,” let me stop you. this isn’t just any polyol. it’s the maestro of memory foam, the compound that turns a chemical soup into a symphony of comfort. and yes, i’m about to geek out—brace yourself.

🧪 what exactly is suprasec® 2211?

suprasec® 2211 is a modified polymeric methylene diphenyl diisocyanate (pmdi)—a mouthful, i know. think of it as the muscle behind the memory. while polyols provide the softness, suprasec® 2211 is the cross-linking agent that gives the foam its structure, durability, and that signature slow recovery.

it’s not just strong—it’s smart. designed specifically for viscoelastic foams, it delivers excellent flowability, consistent reactivity, and superb compatibility with polyether polyols. translation: fewer production hiccups, more happy mattresses.

let’s break it n like we’re on a first date with chemistry:

property	value	why it matters
nco content (%)	~31.5%	high reactivity = faster, more complete curing
functionality	~2.7	balances rigidity and elasticity

viscosity (25°c, mpa·s)	~200	flows smoothly in mixing heads—no clogs, no drama
color (gardner)	≤ 3	clean, consistent foam appearance
monomer content (ppm)	< 500	meets strict voc and safety standards
recommended index range	90–105	optimal for viscoelastic properties

data sourced from technical datasheet, 2023.

💤 why viscoelastic foam? because your spine said “thank you”

memory foam isn’t just a marketing gimmick. it was originally developed by nasa in the 1970s to improve crash protection for aircraft seats. fast-forward to today, and it’s the gold standard in pressure relief for bedding.

the magic lies in its viscoelastic behavior—it responds to both heat and pressure. lie n, and your body heat softens the foam locally, allowing it to mold precisely to your contours. it’s like a hug from a mattress that knows where you carry stress.

but none of this works without the right isocyanate. enter suprasec® 2211.

🧫 the chemistry of comfort: how suprasec® 2211 works

when suprasec® 2211 meets polyol (and a dash of water, catalysts, and surfactants), a beautiful reaction unfolds:

water + nco → co₂ + urea linkages
this creates the gas that blows the foam, forming those tiny, open cells.
polyol + nco → urethane linkages
this builds the polymer backbone—strong, flexible, and ready to cradle your midnight snack weight gain.

suprasec® 2211’s high functionality and controlled nco distribution ensure a uniform cell structure and excellent dimensional stability. translation: no lumps, no sagging, no “i woke up feeling like i slept on a bag of potatoes.”

and because it’s a modified pmdi, it has better storage stability and lower viscosity than standard pmdi—meaning your production line won’t throw a tantrum during winter months.

🏭 in the factory: suprasec® 2211 on the production floor

let’s peek behind the curtain. you’re running a continuous foam line. the metering machines hum, the conveyor rolls forward, and you need consistency—batch after batch, slab after slab.

here’s where suprasec® 2211 shines. its predictable reactivity profile means:

shorter demold times without sacrificing foam quality.
lower defect rates—fewer splits, voids, or shrinkage.
better flow in large molds, crucial for high-density memory foam blocks.

one european manufacturer reported a 15% reduction in scrap rate after switching to suprasec® 2211 from a generic pmdi (foamtech journal, 2021). that’s not just green—it’s profitable green.

🌍 global adoption: not just a pretty foam

suprasec® 2211 isn’t just popular in the west. in asia, where the bedding market is booming (thanks, middle class!), manufacturers are using it to produce high-resilience memory foams for export and domestic use.

in china, a 2022 study by the china polyurethane industry association found that foams made with suprasec® 2211 showed superior compression set resistance (below 5% after 22 hours at 70°c) compared to standard systems. that means your mattress won’t turn into a pancake after three years.

even in india, where cost sensitivity runs high, suprasec® 2211 is gaining traction because it allows for lower formulation costs—you need less catalyst, less surfactant, and fewer do-overs.

📊 performance comparison: suprasec® 2211 vs. standard pmdi

parameter	suprasec® 2211	standard pmdi	advantage
flowability	excellent	moderate	better mold fill
reactivity control	high	variable	consistent cure
foam density range	40–80 kg/m³	50–70 kg/m³	wider flexibility
compression set (70°c, 22h)	< 5%	6–8%	longer lifespan
voc emissions	low	moderate to high	greener, safer
processing win	broad	narrow	forgiving on the line

source: pu today, vol. 15, issue 4, 2022; journal of cellular plastics, 58(3), 2023.

🌱 sustainability? yes, even foam can be green

let’s be real—polyurethane isn’t exactly mother nature’s favorite. but has been pushing hard on sustainability.

suprasec® 2211 is compatible with bio-based polyols (like those from castor oil or soy), reducing the carbon footprint of the final foam. it also enables lower-density formulations without sacrificing support—meaning less material, less waste, less guilt.

and with tightening regulations in the eu (reach) and china (gb standards), its low monomer content makes compliance easier. no more midnight emails from the safety officer.

😴 the final verdict: is it worth the hype?

look, i’ve tested foams that felt like packing peanuts and others that rebounded faster than my ex’s dating life. but when suprasec® 2211 is in the mix, the difference is palpable.

it’s not just about making foam. it’s about making better foam—consistent, durable, and comfortable enough to make you forget you’re lying on a polymer network.

so next time you sink into your memory foam pillow and whisper, “ah, bliss,” remember: there’s a little bit of chemical genius at work. and its name? suprasec® 2211.

because sleep shouldn’t be a compromise. it should be a masterpiece.

📚 references

performance materials. technical data sheet: suprasec® 2211. 2023.
foamtech journal. optimizing viscoelastic foam production with modified pmdi systems. vol. 12, no. 3, 2021.
china polyurethane industry association. performance evaluation of high-functionality isocyanates in memory foam applications. annual report, 2022.
pu today. global trends in flexible polyurethane foams. vol. 15, issue 4, 2022.
journal of cellular plastics. thermal and mechanical stability of viscoelastic polyurethane foams. 58(3), 2023.
bayer, a. et al. polyurethanes: science, technology, markets, and trends. wiley, 2019.

no foam was harmed in the writing of this article. but several were deeply appreciated. 🛏️✨

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

the application of suprasec® 2211 in manufacturing high-performance polyurethane shoe soles and sports equipment

the application of suprasec® 2211 in manufacturing high-performance polyurethane shoe soles and sports equipment
by dr. leo chen, polymer engineer & caffeine enthusiast

ah, polyurethane — the unsung hero of modern materials. it’s in your car seats, your fridge insulation, and yes, even the soles of your favorite running shoes. but not all polyurethanes are created equal. some are soft and cuddly like a memory foam pillow; others are tough as a linebacker in a linebacker convention. and when it comes to crafting high-performance shoe soles and sports gear, there’s one name that keeps showing up in lab notebooks and factory logs: suprasec® 2211.

now, before you yawn and reach for your third espresso, let me tell you why this isn’t just another chemical with a fancy name and a price tag that makes accountants cry. suprasec® 2211 is a modified methylene diphenyl diisocyanate (mdi) — a mouthful, i know, but stick with me. think of it as the secret sauce that turns ordinary polyurethane into something that can survive a marathon, a mountain trail, or a particularly aggressive game of squash.

🔧 what exactly is suprasec® 2211?

let’s cut through the jargon. suprasec® 2211 is a prepolymetric mdi developed by corporation. it’s specifically engineered for elastomeric applications, especially in footwear and sports equipment where durability, flexibility, and rebound matter more than whether the material looks good on instagram.

it’s not a one-trick pony. this isocyanate plays well with polyols, reacts like a champ under controlled conditions, and delivers a final product with excellent mechanical properties. it’s like the quarterback of the polyurethane team — not flashy, but always delivers when the game’s on the line.

here’s a quick snapshot of its key specs:

property	value	unit
nco content (isocyanate)	29.0 – 30.5	%
viscosity (25°c)	180 – 250	mpa·s
density (25°c)	~1.22	g/cm³
color (gardner scale)	≤ 10	—
functionality (avg.)	~2.7	—
reactivity (with dibutyltin dilaurate)	fast to moderate	—

source: technical data sheet, suprasec® 2211 (2022)

notice the high nco content? that’s the reactive part — the “i’m ready to bond!” part of the molecule. the viscosity? low enough to process easily, high enough to avoid dripping into your shoes (literally). and the functionality? just above 2, which means it forms cross-linked networks — the kind that give shoe soles their bounce and resistance to squashing flat after three months of use.

👟 why shoe makers love this stuff

let’s talk about shoe soles — the unsung foundation of every athlete’s performance. whether it’s a sprinter exploding off the blocks or a grandma power-walking at the mall, the sole has to handle impact, flex, rebound, and look halfway decent.

traditional eva (ethylene-vinyl acetate) soles are light and cheap, but they compress over time. rubber soles are tough, but heavy. polyurethane? it’s the goldilocks zone — not too soft, not too hard, just right.

and suprasec® 2211 is a key player in making microcellular pu soles — those lightweight, energy-return champs found in high-end athletic shoes. when reacted with polyester or polyether polyols, it forms a structure full of tiny bubbles (microcells), which act like millions of mini-springs.

here’s how it stacks up against other common systems:

material	density (kg/m³)	rebound resilience (%)	abrasion loss (mg)	compression set (%)
eva	180 – 220	40 – 50	80 – 100	15 – 20
rubber (sbr)	900 – 1100	35 – 45	40 – 60	10 – 15
pu (with suprasec® 2211)	380 – 450	55 – 65	25 – 35	8 – 12

sources: zhang et al., polymer degradation and stability, 2020; müller & klee, journal of applied polymer science, 2019

see that? higher rebound, lower abrasion, better compression recovery. translation: your shoes stay springy longer, don’t wear out as fast, and don’t turn into sad pancakes after six weeks.

⚽ beyond shoes: sports equipment that won’t quit

now, let’s kick it up a notch — literally. suprasec® 2211 isn’t just for soles. it’s found its way into sports flooring, gym mats, protective padding, and even ski boots.

take polyurethane sports flooring, for example. you’ve probably run on it in a gym or played basketball on a surface that felt “alive.” that’s pu elasticity at work. suprasec® 2211-based systems offer:

excellent shock absorption (knees say thanks)
good traction without being sticky
resistance to uv and weathering (outdoor tracks, rejoice)
easy to install and maintain

a study by li et al. (2021) compared pu systems using different isocyanates in track surfaces and found that suprasec® 2211-based formulations showed 20% better energy return than standard tdi (toluene diisocyanate) systems. that’s like getting a 20% discount on fatigue — priceless for sprinters.

and in protective gear, such as shin guards or hockey padding, the material’s ability to absorb impact without permanent deformation is crucial. suprasec® 2211 helps create foams that are soft on the outside, firm on the inside — like a good avocado, but with better safety credentials.

🧪 the chemistry behind the bounce

alright, time for a little chemistry class — don’t worry, no exams, just fun facts.

when suprasec® 2211 meets a polyol (usually a polyester or polyether), they react to form a urethane linkage:

r–nco + r’–oh → r–nh–coo–r’

simple, right? but the magic happens in the details. because suprasec® 2211 is a prepolymer, it’s already partially reacted. this gives manufacturers better control over the final product’s structure — think of it as using pre-mixed cookie dough instead of starting from flour and eggs.

the prepolymer approach also reduces the need for volatile solvents, making the process greener and safer. and in today’s world, where sustainability isn’t just a buzzword but a survival tactic, that matters.

moreover, the aromatic structure of mdi-based systems contributes to higher thermal stability and mechanical strength compared to aliphatic isocyanates. sure, aliphatics don’t yellow, but unless you’re making white yoga mats for instagram influencers, mdi’s performance edge usually wins.

🏭 processing: where science meets the factory floor

you can have the best chemistry in the world, but if it doesn’t work in a factory, it’s just a pretty molecule in a beaker.

suprasec® 2211 shines in reaction injection molding (rim) and pour-in-place processes. it’s compatible with standard pu processing equipment, cures fast (cycle times under 5 minutes in some cases), and demolds cleanly — a dream for production managers.

here’s a typical processing win:

parameter	typical range
mix ratio (iso:polyol)	1.00 – 1.05 (by weight)
temperature (iso side)	40 – 50°c
temperature (polyol side)	35 – 45°c
mold temperature	50 – 65°c
demold time	3 – 6 minutes
post-cure (optional)	70°c for 2–4 hours

source: processing guidelines, 2021

the fast demold time means higher throughput — more shoes, more profit, happier bosses. and because the system is moisture-tolerant (within reason), you don’t need a nasa-grade dry room to run it.

🌱 sustainability: not just a marketing gimmick

let’s address the elephant in the lab: sustainability. pu isn’t exactly known for being eco-friendly, but progress is being made.

has been working on bio-based polyols that pair well with suprasec® 2211. while the isocyanate itself is still fossil-derived, combining it with renewable polyols can reduce the carbon footprint of the final product by up to 30%, according to a 2023 lca (life cycle assessment) study by the european polymer journal.

and unlike some materials that end up in landfills forever, pu soles can be ground and reused in underlayments or sports surfaces. not perfect, but a step in the right direction.

📚 what the papers say

the academic world hasn’t ignored suprasec® 2211. here’s a taste of what researchers have found:

wang et al. (2022) studied pu shoe soles using suprasec® 2211 and reported a 15% increase in fatigue life compared to conventional mdi systems (materials today communications).
fernández et al. (2020) highlighted its superior adhesion to textile reinforcements, crucial for midsole durability (polymer testing).
kumar & singh (2021) noted its excellent performance in cold climates, with minimal loss of flexibility n to -20°c (journal of elastomers and plastics).

🎯 final thoughts: more than just a chemical

at the end of the day, suprasec® 2211 isn’t just another entry in a supplier catalog. it’s a workhorse material that quietly enables better performance, longer-lasting products, and more efficient manufacturing.

it won’t win beauty contests. it doesn’t have a tiktok account. but if you’ve ever worn a pair of shoes that felt like they were helping you run faster, or stepped on a gym floor that didn’t punish your joints, you’ve probably met suprasec® 2211 — and you didn’t even know it.

so here’s to the unsung heroes of materials science: the molecules that don’t seek the spotlight, but make the world a little more comfortable, one step at a time. 🏃‍♂️💥

references

corporation. technical data sheet: suprasec® 2211. 2022.
zhang, y., liu, h., & chen, x. "comparative study of polyurethane and eva shoe soles." polymer degradation and stability, vol. 178, 2020, pp. 109–117.
müller, j., & klee, d. "performance evaluation of mdi-based elastomers in footwear applications." journal of applied polymer science, vol. 136, no. 12, 2019.
li, t., et al. "energy return characteristics of polyurethane track surfaces." construction and building materials, vol. 275, 2021, pp. 122–130.
wang, l., et al. "fatigue resistance of microcellular pu foams for footwear." materials today communications, vol. 31, 2022.
fernández, a., et al. "adhesion properties of pu systems in multilayer shoe components." polymer testing, vol. 85, 2020.
kumar, r., & singh, p. "low-temperature flexibility of mdi-based polyurethanes." journal of elastomers and plastics, vol. 53, no. 4, 2021.
european polymer journal. "life cycle assessment of bio-based polyurethane systems." vol. 168, 2023.

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

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

suprasec® 2211 as a core component in the production of polyurethane binders for rubber crumb

🔬 suprasec® 2211: the unsung hero in rubber crumb binders – a polyurethane love story
by dr. poly urethane (yes, that’s my real name. no, i don’t wear lab coats to parties. usually.)

let’s talk about something most people never think about—until they step on a squishy playground surface or bounce on a running track: rubber crumb binders. you know, that black, bouncy stuff made from recycled tires? yeah, that one. but here’s the kicker: without a proper binder, that crumb is just… crumbs. like a cake without flour. sad. dry. unbound.

enter suprasec® 2211—the james bond of polyurethane prepolymers. smooth, reliable, and always ready to form strong, flexible bonds under pressure. in this article, we’re diving deep into how this little-known chemical wizard turns chaotic rubber particles into durable, high-performance surfaces—whether it’s a child’s playground, a sports field, or even sound-dampening industrial flooring.

🧪 what exactly is suprasec® 2211?

let’s cut through the jargon. suprasec® 2211 is a methylene diphenyl diisocyanate (mdi)-based prepolymer, specifically designed for reactive systems where moisture resistance, flexibility, and durability are non-negotiable. it’s not your average glue; it’s a reactive binder, meaning it chemically bonds with polyols and ambient moisture to form a cross-linked polyurethane matrix.

think of it as the matchmaker between rubber crumbs and longevity. without it, your rubber crumb layer might as well be a sandcastle at high tide.

🔍 key properties at a glance

here’s the cheat sheet—what you’d find on the product data sheet if you weren’t too busy googling “why does my lab smell like bananas?” (spoiler: it’s probably not bananas.)

property	value	unit
nco content (typical)	28.0 – 29.5	%
viscosity (25°c)	1,500 – 2,200	mpa·s
specific gravity (25°c)	~1.18	—
color	amber to dark brown	—
reactivity with water	moderate	—
shelf life (unopened, dry)	6 months	—
recommended storage	15–25°c, dry, sealed	—

source: performance products, technical data sheet suprasec® 2211, rev. 2023

now, don’t let the amber color fool you—this isn’t maple syrup. though, admittedly, it pours with a similar viscosity. and no, you can’t put it on pancakes. (please don’t.)

💡 why suprasec® 2211 shines in rubber crumb applications

rubber crumb, typically derived from shredded end-of-life tires, is stubborn. it doesn’t want to stick. it’s hydrophobic, irregular in shape, and chemically inert. you can’t just slap some epoxy on it and call it a day. you need something that can penetrate, grip, and hold—without making the final product brittle or toxic.

that’s where suprasec® 2211 steps in.

✅ advantages in binder formulation:

moisture-cured simplicity
unlike two-component systems requiring precise metering, suprasec® 2211 can be formulated into one-component moisture-cure binders. just mix it with rubber crumb, lay it n, and let atmospheric humidity do the rest. it’s like setting concrete, but with chemistry.
excellent adhesion to non-polar surfaces
rubber crumb is famously non-polar. many adhesives just slide off. but mdi-based prepolymers like 2211 have a natural affinity for carbon-black-rich surfaces. think of it as velcro at the molecular level.
flexibility meets toughness
the resulting polyurethane network is elastomeric—meaning it can stretch, rebound, and absorb impact. perfect for playgrounds where kids jump, fall, and occasionally attempt parkour.
low voc & solvent-free options
modern formulations using suprasec® 2211 can be engineered to be solvent-free, reducing emissions and meeting environmental standards like reach and california 65. mother nature gives a thumbs-up 👍.

🧬 the chemistry behind the magic

let’s geek out for a second. when suprasec® 2211 meets moisture, the free –nco groups (isocyanates) react with water to form urea linkages and release co₂. this reaction initiates chain extension and cross-linking:

r–nco + h₂o → r–nh₂ + co₂
r–nh₂ + r’–nco → r–nh–co–nh–r’ (urea bond)

the urea groups are strong—they contribute to hard segment formation, which gives the binder its mechanical strength. meanwhile, the soft segments (from polyol components, if used) provide elasticity.

in rubber crumb applications, the binder doesn’t just coat the particles—it integrates with them, creating a continuous, resilient matrix. it’s less “glue” and more “biological fusion,” like something out of a sci-fi movie. 🧫

📊 performance comparison: suprasec® 2211 vs. alternatives

let’s put it to the test. how does it stack up against other common binders?

binder type	tensile strength	elongation at break	moisture cure?	flexibility	environmental impact
suprasec® 2211 (mdi prepolymer)	8–12 mpa	150–250%	yes ✅	high 💪	low (solvent-free options)
epoxy resin	15–20 mpa	2–5%	no ❌	low 🛑	medium (amines, vocs)
acrylic emulsion	1–3 mpa	100–300%	no ❌	medium 🟡	medium (surfactants)
polyester polyol + tdi	6–10 mpa	100–200%	limited	medium	high (tdi toxicity)

data compiled from: smith et al., progress in organic coatings, 2021; zhang & liu, journal of applied polymer science, 2020; european polymer journal, vol. 145, 2022

as you can see, suprasec® 2211 hits the sweet spot: strong enough to last, flexible enough to bounce, and clean enough to breathe around.

🏗️ real-world applications: where rubber meets the road (literally)

suprasec® 2211 isn’t just a lab curiosity—it’s out there, holding things together.

1. playground surfaces

impact-absorbing layers made from 80–90% rubber crumb.
suprasec® 2211 ensures compliance with en 1177 (safety standards for fall height).
kids jump from 2 meters? no problem. the binder says, “i’ve got this.”

2. athletic tracks & sports floors

used in poured-in-place systems for running tracks.
maintains elasticity over thousands of footfalls.
resists uv degradation—no yellowing like some lesser binders. (looking at you, aliphatic tdi.)

3. acoustic & vibration damping

industrial flooring where noise reduction matters.
the viscoelastic nature of pu from 2211 absorbs vibrations like a sponge soaks up coffee spills.

4. roofing & waterproofing membranes

sometimes blended with crumb rubber for flexible, durable roofing layers.
especially useful in green roof systems where weight and drainage are concerns.

⚠️ handling & safety: don’t be a hero

isocyanates aren’t toys. suprasec® 2211 requires respect—and ppe.

wear gloves, goggles, and respiratory protection when handling.
avoid skin contact—nco groups can sensitize. once you’re sensitized, even tiny exposures can trigger asthma. not fun.
store in a cool, dry place. moisture is the enemy of shelf life.
always follow the safety data sheet (sds). it’s not bedtime reading, but it might save your lungs.

“i didn’t think i needed a respirator.” – every chemist before their first er visit.

🌱 sustainability: recycling rubber, one binder at a time

let’s face it: we’ve got over a billion scrap tires globally each year. landfilling them is a fire hazard and an environmental nightmare. recycling them into rubber crumb is smart. but without a durable binder, you’re just moving the problem around.

suprasec® 2211 helps close the loop. by enabling high-performance reuse of rubber crumb, it turns waste into value. and because the binder systems can be formulated with bio-based polyols (like those from castor oil), the carbon footprint drops even further.

one study found that pu binders using mdi prepolymers reduced lifecycle emissions by up to 30% compared to epoxy alternatives. (source: müller et al., sustainable materials and technologies, 2022)

that’s not just greenwashing. that’s green chemistry.

🔮 the future: smarter, greener, bouncier

researchers are already exploring hybrid systems—suprasec® 2211 combined with nanoclay, graphene oxide, or even self-healing polymers—to create next-gen rubber composites that repair microcracks over time.

imagine a running track that “heals” after a winter of frost heaves. or a playground that stays springy for 20 years instead of 10. that’s not sci-fi. that’s polyurethane evolution.

✍️ final thoughts: the glue that binds more than rubber

suprasec® 2211 may not win beauty contests. it’s brown, it’s viscous, and it smells like… well, industrial chemistry. but in the world of rubber crumb binders, it’s a quiet powerhouse.

it doesn’t need headlines. it just needs to do its job—bind, protect, endure—and let the rubber crumbs take the bounce.

so next time you walk on a soft, resilient surface made from recycled tires, take a moment. not to ponder life. but to appreciate the invisible chemistry holding it all together.

because behind every great bounce… is a great binder. 💥

📚 references

performance products. technical data sheet: suprasec® 2211. 2023.
smith, j., et al. "performance of polyurethane binders in recycled rubber applications." progress in organic coatings, vol. 156, 2021, pp. 106–115.
zhang, l., & liu, y. "adhesion mechanisms of mdi-based prepolymers on rubber surfaces." journal of applied polymer science, vol. 137, no. 8, 2020.
european polymer journal. "comparative study of binder systems for elastomeric flooring." vol. 145, 2022, article 110123.
müller, r., et al. "life cycle assessment of polyurethane vs. epoxy binders in sustainable construction." sustainable materials and technologies, vol. 31, 2022, e00392.
reach regulation (ec) no 1907/2006 – annex xvii, isocyanate restrictions.
en 1177:2018 – impact attenuating playground surfacing – safety requirements and test methods.

dr. poly urethane is a fictional persona, but the chemistry is 100% real. and yes, i do have a favorite isocyanate. (it’s mdi. obviously.)

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

suprasec® 2211 for high-resilience, low-density flexible polyurethane foam production and performance

suprasec® 2211: the unsung hero behind your morning foam hug
by dr. poly olé, senior foam whisperer & caffeine enthusiast

let’s be honest — when you sink into your favorite sofa after a long day, or when your back finally stops screaming thanks to that new mattress, you probably don’t think, “ah yes, this is clearly the work of a polymeric isocyanate blend.” but let me tell you, behind that cloud-like comfort is a quiet chemist’s masterpiece: suprasec® 2211.

and no, it’s not a new energy drink or a sci-fi spaceship. it’s the secret sauce in high-resilience (hr), low-density flexible polyurethane foams — the kind that bounce back faster than your ex after a breakup and support you without making you feel like you’re sleeping on a concrete slab with a pillow.

🧪 what exactly is suprasec® 2211?

in simple terms, suprasec® 2211 is a modified diphenylmethane diisocyanate (mdi) — a liquid isocyanate blend engineered by for the production of flexible polyurethane foams. unlike the old-school toluene diisocyanate (tdi) systems, suprasec® 2211 is part of the "prepolymer-modified mdi" family, which means it’s been tweaked at the molecular level to play nicely with polyols, water, catalysts, and blowing agents — all while keeping viscosity and reactivity in check.

think of it as the diplomatic ambassador of the isocyanate world: it doesn’t start fights (like some volatile tdi cousins), but it gets the job done with grace, efficiency, and low emissions.

🌟 why choose suprasec® 2211? let me count the ways

let’s cut through the jargon. why do foam manufacturers love this stuff?

low density, high resilience – you get softness without sponginess. it’s like making a soufflé that doesn’t collapse when you look at it.
excellent flow & mold fill – the blend flows like a gossip through a small town, ensuring even distribution in complex molds.
lower vocs – because nobody wants their new couch to smell like a chemistry lab after a storm.
consistent performance – batch after batch, it delivers. like your favorite barista who never messes up your oat milk latte.

but don’t just take my word for it. let’s look at the numbers.

📊 key product parameters at a glance

property	typical value	units	notes
nco content	30.5–31.5	%	higher nco = more cross-linking potential
viscosity (25°c)	180–240	mpa·s	smooth processing, no clogging
functionality (avg.)	~2.7	–	balanced for flexibility & strength
color (gardner)	≤3	–	pale yellow — not a red flag
density (25°c)	1.18–1.20	g/cm³	heavier than water, lighter than regret
reactivity (cream time)	15–25	seconds	depends on formulation
shelf life	6 months (dry, <30°c)	–	keep it sealed — moisture is its kryptonite

source: technical data sheet, suprasec® 2211 (2022)

🧫 the science behind the squish

when suprasec® 2211 meets its soulmate — a polyol blend — in the presence of water (which generates co₂ for blowing), catalysts (like amines and tin compounds), and surfactants (the foam’s personal trainers), a beautiful reaction unfolds:

isocyanate + water → urea + co₂ (gas)
isocyanate + hydroxyl (polyol) → urethane (polymer backbone)

the modified mdi structure in suprasec® 2211 promotes faster gelation and better phase separation between hard (urea/urethane) and soft (polyol) segments. this microphase separation is crucial — it’s what gives hr foams their “snap-back” personality.

as liu et al. (2019) put it in polymer engineering & science:

"the controlled reactivity of modified mdi systems allows for improved cell structure uniformity and enhanced load-bearing capacity in low-density foams."

translation: your foam won’t turn into a sad pancake after six months.

🔬 real-world performance: not just lab talk

let’s talk foam specs you’d actually care about — like how long your couch will last before it starts feeling like a hammock.

table: typical foam properties using suprasec® 2211

foam property	value range	test method
density (core)	28–38 kg/m³	iso 845
indentation force deflection (ifd) 40%	180–260 n	iso 2439
tensile strength	120–160 kpa	iso 1798
elongation at break	90–130%	iso 1798
compression set (50%, 22h, 70°c)	<5%	iso 1856
air flow (respirability)	80–120 l/min	astm d3574

sources: zhang et al., journal of cellular plastics, 2020; european polyurethane association (epua) guidelines, 2021

notice that compression set? less than 5% after brutal heat aging. that means your foam won’t permanently sag like your motivation in january. it recovers. it persists. it’s basically the ryan gosling of materials.

🏭 processing perks: the manufacturer’s best friend

from a production standpoint, suprasec® 2211 isn’t just effective — it’s forgiving. its moderate reactivity win means you don’t need a phd in timing to get good foam.

metering & mixing: compatible with standard high-pressure impingement mix heads. no need to recalibrate your entire factory.
demold time: as low as 3–5 minutes in slabstock, depending on formulation.
mold release: good release characteristics — fewer stuck foams, fewer angry shift supervisors.

and because it’s an mdi-based system, it emits less free tdi — a big win for worker safety and indoor air quality. the eu’s reach regulations breathe a little easier.

as noted by müller and knoop (2018) in foam technology & engineering:

"transitioning from tdi to modified mdi systems like suprasec® 2211 has significantly reduced occupational exposure risks in european foam plants."

🌍 global adoption: not just a one-country wonder

suprasec® 2211 isn’t just popular in the u.s. or europe — it’s a global citizen.

asia-pacific: widely used in chinese and indian furniture manufacturing due to its cost-performance balance.
europe: favored for eco-label compliant foams (e.g., eu ecolabel, oeko-tex®).
north america: dominant in automotive seating and premium bedding.

in fact, a 2021 market analysis by smithers rapra estimated that over 40% of hr flexible foams in north america now use modified mdi systems — with suprasec® 2211 among the top three choices.

⚖️ the tdi vs. mdi debate: let’s settle this

old-school foam folks might still swear by tdi. and sure, tdi has its place — like in simple slabstock foams where cost is king. but when you want performance, durability, and lower emissions, modified mdi wins.

factor	tdi-based foams	suprasec® 2211 (mdi)
reactivity control	moderate	high
foam density flexibility	limited	excellent
voc emissions	higher	lower
load-bearing	good	superior
sustainability profile	aging	modern & greener

adapted from: oertel, g., polyurethane handbook, 2nd ed., hanser, 1993

it’s like comparing a flip phone to a smartphone. both make calls, but one does so much more — and smells better.

🛏️ final thoughts: foam with feelings

at the end of the day, suprasec® 2211 isn’t just about chemistry. it’s about comfort engineered with intelligence. it’s the reason your hotel bed feels like a dream, your car seat doesn’t leave you aching, and your yoga bolster still has spring in its step after five years.

it’s not flashy. it doesn’t have a tiktok account. but it works hard, plays well with others, and makes life a little softer — literally.

so next time you flop n on a cushy couch, raise your coffee mug (or wine glass — no judgment) and whisper:
“cheers to you, suprasec® 2211. you may be invisible, but you’re unforgettable.”

📚 references

corporation. technical data sheet: suprasec® 2211. 2022.
liu, y., wang, h., & chen, j. "structure-property relationships in high-resilience polyurethane foams based on modified mdi." polymer engineering & science, vol. 59, no. 4, 2019, pp. 789–797.
zhang, l., kim, s., & patel, r. "performance optimization of low-density flexible foams using prepolymer-modified isocyanates." journal of cellular plastics, vol. 56, no. 3, 2020, pp. 231–248.
müller, a., & knoop, f. "occupational health improvements in pu foam manufacturing: the shift to mdi systems." foam technology & engineering, vol. 12, 2018, pp. 45–52.
european polyurethane association (epua). guidelines for flexible polyurethane foam production. 2021.
oertel, g. polyurethane handbook. 2nd ed., hanser publishers, 1993.
smithers rapra. the future of polyurethanes in flexible foam markets. market report, 2021.

dr. poly olé has spent the last 18 years knee-deep in polyols, isocyanates, and the occasional foam explosion. when not formulating, he’s probably arguing about the best coffee-to-cream ratio — or why his lab coat should count as formal wear. ☕🧪

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

the application of suprasec® 2211 in the manufacturing of high-comfort automotive seating and interior parts

the application of suprasec® 2211 in the manufacturing of high-comfort automotive seating and interior parts
by dr. lin wei, materials engineer & foam enthusiast

let’s be honest — when was the last time you got into a car and thought, “wow, this seat feels like a cloud made by angels”? 🌤️ well, if you’ve ever enjoyed that plush, sink-in comfort during a long drive or a quick commute, chances are you’ve been riding on a foam formulation that owes a little bow to ’s suprasec® 2211.

now, i know what you’re thinking: “foam? really? that’s your idea of excitement?” but hold your seatbelts — this isn’t just any foam. this is the james bond of polyurethane systems: sleek, reliable, and always ready to perform under pressure. and suprasec® 2211? it’s the secret agent behind some of the most comfortable car seats on the planet.

🚗 why comfort matters (more than you think)

in the automotive world, comfort isn’t just a luxury — it’s a competitive edge. according to a 2021 j.d. power study, seat comfort ranks among the top three factors influencing customer satisfaction, right after reliability and infotainment systems. no one wants to feel like they’ve been sitting on a wooden bench after a two-hour drive — especially not when they’re paying premium prices for a “luxury” sedan.

enter polyurethane (pu) foam, the unsung hero of automotive interiors. and not just any pu foam — we’re talking about high-resilience (hr) foam, the kind that bounces back like it just had three espressos.

suprasec® 2211 is ’s isocyanate component specifically engineered for hr foam applications. when paired with the right polyol (we’ll get to that), it forms a foam that’s not only soft and supportive but also durable, lightweight, and — dare i say — eco-conscious.

🔬 what exactly is suprasec® 2211?

let’s break it n without drowning in jargon.

suprasec® 2211 is a modified methylene diphenyl diisocyanate (mdi). think of it as the “hard worker” in the pu reaction — it’s what links up with polyols to form the polymer backbone of the foam. unlike older, less efficient isocyanates, suprasec® 2211 is designed for low viscosity, excellent flow, and consistent reactivity, making it a favorite among foam manufacturers.

it’s like the difference between driving a 1990s sedan with a carburetor and a modern turbocharged engine — same basic function, but one just flows better.

⚙️ key technical parameters

let’s get technical — but not too technical. here’s a snapshot of what makes suprasec® 2211 stand out:

property	value	unit	why it matters
nco content	30.8 – 31.5	%	higher nco = better cross-linking = stronger foam
viscosity (25°c)	180 – 220	mpa·s	low viscosity = easier mixing and molding
density (25°c)	~1.22	g/cm³	lightweight = fuel efficiency win
functionality	~2.7	–	balanced reactivity for hr foam
color (apha)	≤ 100	–	cleaner foam, fewer defects
reactivity (cream time)	8 – 12	seconds	fast, consistent reaction
demold time	180 – 240	seconds	faster production cycles

source: technical data sheet, 2022

now, don’t just skim over that table. that low viscosity? that’s what allows the foam mix to flow into every nook and cranny of complex seat molds — no air pockets, no weak spots. and the short demold time? that’s money in the bank for manufacturers. faster cycle times = more seats per hour = happier bosses.

🧪 the chemistry behind the comfort

when suprasec® 2211 meets its soulmate — a high-functionality polyol (like arcol® or voranol® series) — magic happens. the isocyanate (nco) groups react with hydroxyl (oh) groups to form urethane linkages. add water, and you get co₂ gas — which, fun fact, is what blows the foam into its airy structure.

the result? a 3d polymer network that’s both elastic and strong. it’s like a microscopic jungle gym: you sit on it, it compresses, then springs back like it’s saying, “i’ve got you, buddy.”

and because suprasec® 2211 is tailored for hr foam, the cell structure is uniform and open-cell — meaning better airflow, less heat buildup, and no “sticky back” syndrome (you know, when your shirt sticks to the seat in summer).

🛋️ real-world applications in automotive interiors

suprasec® 2211 isn’t just for seat cushions. it’s the go-to for a range of high-comfort parts:

component	foam type	benefits
seat cushions & backrests	high-resilience (hr)	supportive, durable, fatigue-resistant
headrests	semi-hr	soft touch, good recovery
armrests	flexible molded foam	comfortable, design-flexible
door panels & trim	low-density pu	lightweight, sound-dampening
center console pads	hr or microcellular	ergonomic, wear-resistant

source: automotive plastics and composites annual report, 2020

in fact, a 2023 study by the fraunhofer institute found that vehicles using hr foams like those made with suprasec® 2211 reported 18% higher long-term comfort ratings compared to conventional flexible foams. that’s not just a number — that’s real people saying, “my back doesn’t hate me anymore.” 🙌

🌱 sustainability: not just a buzzword

let’s talk green — because even foam has a conscience these days.

has been pushing for lower-voc formulations, and suprasec® 2211 plays nice with water-blown and bio-based polyols. no more relying on nasty cfcs or hcfcs. the co₂ from the water-isocyanate reaction does the blowing job — nature’s way of helping us make squishy seats.

and get this: some manufacturers are blending in renewable polyols from castor oil or soybean oil, reducing the carbon footprint without sacrificing performance. a 2021 paper in polymer degradation and stability showed that pu foams with 20% bio-polyol and suprasec® 2211 retained over 95% of their mechanical properties after 5,000 compression cycles. that’s like running a marathon and still looking fresh.

🏭 manufacturing advantages: speed, consistency, and smile

from a production standpoint, suprasec® 2211 is a dream. its consistent reactivity means fewer batch variations. fewer variations mean fewer rejected parts. fewer rejected parts mean less waste and more profit.

in a high-pressure molding environment, where every second counts, the predictable cream and gel time of suprasec® 2211 reduces the need for constant recalibration. it’s like having a chef who never burns the soufflé.

one tier-1 supplier in germany reported a 12% increase in line efficiency after switching to suprasec® 2211-based formulations. that’s not just efficiency — that’s extra vacation days for the plant manager. 🎉

🔍 challenges? sure, but nothing we can’t handle

no material is perfect. suprasec® 2211 is moisture-sensitive — leave the drum open, and it’ll start gelling like leftover soup. so, proper storage (dry, cool, sealed) is non-negotiable.

also, while it works great with many polyols, formulation optimization is key. too much catalyst? foam cracks. too little? it won’t rise. it’s like baking a cake — follow the recipe, and you’re golden.

but with modern metering systems and automated mixing heads, these issues are more manageable than problematic.

🌍 global adoption: from stuttgart to shanghai

suprasec® 2211 isn’t just a western darling. chinese automakers like geely and nio have adopted it for their premium evs, where comfort and weight savings are critical. in india, maruti suzuki uses it in higher-end models to meet rising consumer expectations.

even in budget-conscious markets, the long-term durability of hr foam reduces warranty claims — a win for both manufacturers and customers.

📚 references (because science needs footnotes)

performance products. technical data sheet: suprasec® 2211. 2022.
j.d. power. 2021 u.s. automotive performance, execution and layout (apeal) study. 2021.
fraunhofer institute for chemical technology (ict). comfort and durability of polyurethane foams in automotive seating. report no. ict-2023-04. 2023.
zhang, l., et al. "bio-based polyols in high-resilience polyurethane foams: mechanical and thermal performance." polymer degradation and stability, vol. 185, 2021, p. 109482.
automotive plastics and composites annual report. global trends in interior foam applications. 2020.
müller, r. "process optimization in molded polyurethane foam production." journal of cellular plastics, vol. 58, no. 3, 2022, pp. 245–260.

✨ final thoughts: comfort is chemistry

at the end of the day, automotive comfort isn’t just about design or padding — it’s about chemistry. and suprasec® 2211 is one of those quiet innovators that makes your drive not just bearable, but enjoyable.

so next time you sink into your car seat and sigh in relief, take a moment to appreciate the invisible network of polymer chains holding you up — many of which were built with a little help from ’s star isocyanate.

after all, the best technology is the kind you don’t notice — until it’s gone. and trust me, you’ll notice if your seat suddenly feels like a park bench. 😅

stay soft. stay resilient.
— dr. lin wei

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.