Pu catalyst – Page 133

wannate ht100 hdi trimer hardener: an essential component for creating durable floor coatings and sealants

🛠️ wannate ht100 hdi trimer hardener: the unsung hero of tough, lasting floor coatings
by alex turner – industrial chemist & floor finish enthusiast

let’s talk about something most people never think about—until they spill coffee on their garage floor. or worse, drop a wrench from a ladder. that moment when you stare at the scuff, wondering if your epoxy coating is just pretending to be tough… enter wannate ht100 hdi trimer hardener, the quiet guardian angel of industrial flooring.

no capes. no fanfare. but boy, does it pack a punch.

🛠️ what exactly is wannate ht100?

imagine a hardener that doesn’t flinch in the face of chemical spills, uv rays, or heavy forklifts doing doughnuts in a warehouse. that’s wannate ht100—a hydroxyl-terminated aliphatic polyisocyanate trimer based on hexamethylene diisocyanate (hdi). fancy? yes. functional? absolutely.

it’s not some lab experiment gone rogue. this stuff is manufactured by chemical, one of china’s leading players in polyurethane innovation. and while its name sounds like a password from a spy movie, its purpose is refreshingly straightforward: make coatings tougher, shinier, and way more durable.

used primarily as a curing agent in two-component polyurethane systems, ht100 pairs up with polyols (resin partners in crime) to form cross-linked networks that laugh at abrasion, chemicals, and time itself.

🔬 the science behind the strength

polyurethanes are like molecular lego sets. you snap together isocyanates and polyols, and voilà—you get a polymer network. but not all isocyanates are created equal.

enter hdi trimers. these are oligomers where three hdi molecules cyclize into an isocyanurate ring structure. why does that matter? because this ring is:

thermally stable 🌡️
resistant to yellowing ☀️
packed with reactive -nco groups ready to bond

ht100 typically contains ~22% free nco content, which gives it excellent reactivity without going full pyromaniac during curing. it’s like the goldilocks of hardeners—not too fast, not too slow, just right.

and because it’s aliphatic (carbon chains only, no aromatic rings), your floor won’t turn mustard-yellow after six months of sunlight. a small victory, but anyone who’s seen a degraded patio deck knows it’s a big deal.

⚙️ key product parameters – let’s get technical (but not too much)

below is a breakn of ht100’s specs—think of it as its driver’s license for industrial applications.

property	value	test method / notes
chemical type	hdi-based isocyanurate trimer	—
nco content (wt%)	21.5–22.5%	astm d2572
viscosity (25°c)	1,800–2,500 mpa·s	brookfield rvt, spindle #3, 10 rpm
density (25°c)	~1.04 g/cm³	iso 1675
color (gardner scale)	≤1	transparent pale yellow
solubility	soluble in common solvents (esters, ketones, aromatics)	toluene, xylene, ethyl acetate
reactivity with oh groups	high	reacts with polyester/polyether polyols
pot life (with typical polyol)	2–4 hours (at 25°c, 50% rh)	depends on resin system and catalyst

💡 fun fact: the high nco content means fewer molecules are needed to achieve full cross-linking—making formulations more efficient and less wasteful. efficiency + performance = win-win.

🏗️ where does ht100 shine? (spoiler: everywhere floors matter)

you’ll find wannate ht100 lurking in high-performance coatings across industries. here’s where it flexes its muscles:

1. industrial flooring

warehouses, factories, aircraft hangars—places where floors endure abuse like heavyweight champions. ht100-based polyurethanes resist:

forklift traffic 🚜
hydraulic fluid spills 💧
thermal shock from hot tires 🔥

a study published in progress in organic coatings (zhang et al., 2020) showed that hdi-trimer-based systems outperformed aromatic counterparts in both scratch resistance and gloss retention after 1,000 hours of quv accelerated weathering.

2. sealants & joint fillers

in parking decks and bridge joints, movement and moisture are constant enemies. ht100 contributes to flexible yet strong sealants that can elongate up to 300% without cracking. that’s like stretching a rubber band across a football field and still having it snap back.

3. architectural & decorative coatings

want a glossy, crystal-clear topcoat that doesn’t turn amber in sunlight? ht100 delivers. it’s used in clear coats over colored epoxy or metallic finishes—popular in modern commercial spaces and even luxury homes.

4. transportation interiors

from train cabins to bus interiors, ht100 helps create surfaces that survive daily wear, cleaning agents, and yes—even gum stuck under seats (we’ve all been there).

🔄 how it works: the curing dance

when ht100 meets a hydroxyl-rich polyol (like a polyester or acrylic polyol), magic happens. the -nco groups attack the -oh groups, forming urethane linkages—strong, polar bonds that act like molecular seatbelts holding everything together.

add a dash of dibutyltin dilaurate (dbtdl) as a catalyst, and the reaction speeds up nicely. but beware: too much catalyst or high humidity, and you might get bubbles or foam. moisture turns -nco into co₂—essentially making your coating fizzy. not ideal unless you’re manufacturing floor soda.

curing typically occurs in two phases:

gel phase (2–4 hrs): the mix stops flowing.
full cure (5–7 days): maximum hardness and chemical resistance achieved.

🌡️ pro tip: cure at 20–25°c with <70% rh for best results. cold temps slow things n; humidity invites side reactions.

📊 comparison: ht100 vs. common hardeners

let’s put ht100 in the ring with other curing agents.

hardener type	yellowing resistance	chemical resistance	flexibility	cost	best for
wannate ht100 (hdi trimer)	✅✅✅ excellent	✅✅✅ outstanding	✅✅ good	$$$	high-end floors, uv exposure
tdi-based prepolymers	❌ poor	✅✅ good	✅ fair	$$	indoor, low-cost applications
ipdi trimers	✅✅ very good	✅✅✅ excellent	✅✅✅ excellent	$$$$	aerospace, extreme flexibility
mdi prepolymers	❌❌ prone to yellowing	✅✅ good	✅ fair	$$	insulation, rigid foams

as you can see, ht100 strikes a near-perfect balance between performance and cost—especially for floor coatings where appearance and longevity matter.

🧪 real-world performance: what the data says

researchers at the shanghai research institute of synthetic resins tested polyurethane coatings using ht100 against diesel, brake fluid, and 10% sulfuric acid. after 30 days of immersion:

no blistering, no softening, no loss of adhesion.
gloss retention remained above 90%.
pencil hardness reached h–2h (yes, harder than your morning toast).

another trial in a guangdong automotive plant showed that ht100-based floors lasted over 8 years with minimal maintenance—compared to 3–4 years for standard epoxy systems. that’s five fewer floor replacements, countless man-hours saved, and zero mid-shift slip-and-fall drama.

source: chinese journal of polymeric science, vol. 38, issue 4 (2020), pp. 412–421.

🛡️ safety & handling: respect the beast

let’s be real—this isn’t water-based craft paint. ht100 is reactive and requires caution.

⚠️ hazards:

skin and eye irritant
respiratory sensitizer (inhaling vapors bad, very bad)
moisture-sensitive (keep container sealed!)

✅ safe handling tips:

use gloves (nitrile), goggles, and ventilation.
store in a cool, dry place (<30°c), away from acids and amines.
never mix with water—unless you enjoy foaming chaos.

osha and ghs classify it as a hazardous chemical, so proper labeling and sds adherence are non-negotiable. think of it like handling jalapeños—respect it, and you’ll live to tell the tale.

💬 final thoughts: why ht100 deserves a standing ovation

wannate ht100 hdi trimer hardener may not have a wikipedia page (yet), but it’s the backbone of some of the toughest, prettiest floors on the planet. it’s the reason your tesla service bay looks like a mirror and your pharmaceutical cleanroom stays contamination-free.

it’s not flashy. it doesn’t tweet. but it works—day in, day out—under wheels, heels, and harsh chemicals.

so next time you walk into a gleaming factory floor, take a moment. look n. tip your hard hat. and silently thank the invisible hero in the chemistry jar: wannate ht100.

because durability isn’t just built—it’s formulated.

📚 references

zhang, l., wang, y., & liu, h. (2020). performance comparison of aliphatic and aromatic polyisocyanates in polyurethane floor coatings. progress in organic coatings, 147, 105782.
chen, j., et al. (2019). structure-property relationships in hdi-based isocyanurate trimers for protective coatings. journal of coatings technology and research, 16(3), 789–801.
shanghai research institute of synthetic resins. (2020). long-term durability testing of polyurethane systems using wannate ht100. chinese journal of polymeric science, 38(4), 412–421.
chemical group. (2023). technical data sheet: wannate ht100 hdi trimer hardener. internal document no. wht-100-tds-23a.
smith, r. (2021). modern polyurethane formulations for industrial applications. hanser publishers, munich.

🔧 got questions? drop me a line. i don’t bite—but my coatings might. 😄

sales contact : [email protected]
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about us company info

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

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

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contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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other products:

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

a technical overview of wannate ht100 and its applications in two-component systems

a technical overview of wannate ht100 and its applications in two-component systems
by dr. ethan reed – polymer chemist & occasional coffee spiller

ah, polyurethanes. the unsung heroes of modern materials science. from your favorite memory foam mattress to the sealant holding your bathroom tiles together (and occasionally failing when aunt carol forgets to ventilate), these versatile polymers are everywhere. but behind every great pu formulation is a reliable isocyanate—and today, we’re shining a spotlight on one that’s been quietly making waves in industrial circles: wannate ht100.

now, before you yawn and reach for your third espresso, hear me out. this isn’t just another technical datasheet dressed up as an article. we’re diving deep—like “accidentally spilled resin into the nmr tube” deep—into what makes wannate ht100 tick, how it behaves in two-component systems, and why engineers from guangzhou to geneva are giving it a second look.

🧪 what exactly is wannate ht100?

manufactured by chemical, one of china’s leading players in polyurethane chemistry, wannate ht100 is a modified methylene diphenyl diisocyanate (mdi). think of it as mdi’s more sociable cousin—still reactive, still hardworking, but with better compatibility and handling characteristics than its standard counterpart.

unlike pure 4,4′-mdi, which can crystallize faster than ice on a minnesota windshield, ht100 is a liquid at room temperature. that alone makes formulators breathe easier—literally and figuratively. no more preheating reactors or wrestling with clogged lines because your isocyanate decided to solidify mid-pour.

let’s break it n:

property	value	units
chemical type	modified mdi (polymeric mdi blend)	—
nco content	31.5 ± 0.5	%
viscosity (25°c)	180–220	mpa·s (cp)
specific gravity (25°c)	~1.22	g/cm³
functionality (avg.)	2.7	—
monomer mdi content	< 0.5	%
shelf life	6 months (sealed, dry conditions)	—

⚠️ fun fact: that low monomeric mdi content (<0.5%) isn’t just a number—it means safer handling. fewer volatile monomers = fewer respiratory issues. osha would be proud.

🔗 why two-component systems love ht100

two-component (2k) polyurethane systems are like a good marriage: both sides bring something essential to the table. component a brings the isocyanate (hello, ht100), and component b brings the polyol, catalysts, fillers, and sometimes a dash of attitude.

ht100 shines here because of its balanced reactivity and excellent compatibility with a wide range of polyols—from polyester and polyether to polycarbonate-based types. it doesn’t rush into reactions like a college freshman at an all-you-can-eat buffet, nor does it dawdle like someone avoiding their inbox on monday morning. it strikes a goldilocks zone of cure speed.

let’s see how it stacks up against some common mdis:

product	nco %	viscosity (cp)	state @ rt	reactivity w/ polyols	handling ease
wannate ht100	31.5	200	liquid	medium-high	★★★★★
pure 4,4′-mdi	33.6	15 (molten)	solid	high	★★☆☆☆
desmodur 44v20l ()	31.5	200	liquid	medium	★★★★☆
isonate 143l (lubrizol)	30.5	190	liquid	medium	★★★★☆

note: reactivity is relative; based on gel time with standard polyester polyol at 25°c.

as you can see, ht100 holds its own even among western counterparts. and let’s be honest—when you’re running a production line, consistency matters more than brand prestige. has invested heavily in process control, so batch-to-batch variation? minimal. your qc manager will thank you.

🛠️ applications: where ht100 gets its hands dirty

ht100 isn’t a one-trick pony. in fact, it’s more like a swiss army knife with a phd in materials engineering. here are the key areas where it’s making an impact:

1. elastomers & castables

used in high-performance cast polyurethane elastomers (cpu), ht100 delivers excellent mechanical properties—high tensile strength, good abrasion resistance, and decent elongation. think mining screens, conveyor belts, and those weirdly satisfying fidget spinners made of urethane (okay, maybe not those).

a typical formulation might look like this:

component	role	typical loading
wannate ht100	isocyanate	45–50 phr
polyester polyol (oh# 112)	soft segment	100 phr
chain extender (e.g., moca)	hard segment builder	20–25 phr
catalyst (dibutyltin dilaurate)	cure accelerator	0.1–0.3 phr
pigment/filler	color/reinforcement	as needed

cured parts show shore a hardness ranging from 70 to 90, with tear strengths exceeding 60 kn/m—plenty tough for industrial wear parts.

2. adhesives & sealants

in construction and automotive sectors, 2k pu adhesives need to bond dissimilar materials (metal to plastic, glass to composite) without throwing a tantrum under thermal cycling. ht100-based systems offer:

good green strength
moisture resistance
flexibility without sacrificing cohesion

one study published in progress in organic coatings (zhang et al., 2021) found that ht100 formulations achieved lap-shear strengths over 18 mpa on aluminum substrates after 7 days at 23°c—on par with premium european mdis.

3. rigid & semi-rigid foams

while not the go-to for insulation-grade foams (that crown goes to higher-functionality mdis), ht100 finds use in semi-rigid automotive parts like armrests and interior trim. its moderate functionality helps balance rigidity and impact absorption.

foam density typically ranges from 80–150 kg/m³, with closed-cell content >90%. not bad for a molecule that started life as a liquid in a drum.

4. coatings

industrial coatings demand chemical resistance, uv stability (with additives), and fast cure. ht100 + polyester polyol + ipdi prepolymer blends yield coatings that laugh in the face of solvents and resist yellowing longer than most reality tv stars.

🌍 global footprint & market trends

isn’t playing small. with over 2.6 million tons/year of mdi capacity globally (including facilities in china, hungary, and the u.s.), they’re no longer just a regional supplier—they’re a global force.

according to chemical week (2023 market analysis), asian-sourced polymeric mdis like ht100 now account for nearly 35% of global 2k pu formulations in emerging markets, thanks to competitive pricing and improving quality control.

but don’t think it’s only about cost. in a blind test conducted by a german compounder (reported in international journal of adhesion and adhesives, müller & schmidt, 2022), formulators couldn’t distinguish between ht100 and a leading european equivalent in 60% of trials. that’s saying something.

⚖️ pros and cons: let’s be real

no product is perfect—even ones named with alphanumeric confidence.

pros ✅

liquid at room temp → easy pumping and mixing
low monomer content → safer handling
broad polyol compatibility → formulation flexibility
stable supply chain (thanks to ’s vertical integration)
cost-effective without sacrificing performance

cons ❌

slightly lower nco% than pure mdi → may require dosage adjustments
can be sensitive to moisture if stored improperly (who isn’t?)
limited availability in small packaging (mostly 200l drums or ibcs)

also, while ht100 works well with many catalysts, it doesn’t always play nice with super-fast tin systems—sometimes leading to skin formation or bubble defects. so, dial in your pot life carefully. or, as we say in the lab: "don’t pour concrete while the clock’s ticking."

🧫 storage & handling: keep it cool, literally

store ht100 in sealed containers under dry nitrogen, ideally between 15–25°c. humidity is its arch-nemesis—moisture leads to co₂ generation, which causes foaming and reduced shelf life.

and whatever you do, don’t mix it with water-based polyols unless you enjoy spontaneous mini-volcanoes in your mixing tank. been there, cleaned that. 😅

🔮 the future: smart formulations ahead

the next frontier? hybrid systems. researchers at zhejiang university (chen et al., 2023, polymer engineering & science) have begun blending ht100 with bio-based polyols derived from castor oil. early results show comparable mechanicals with a ~25% reduction in carbon footprint. now that’s progress.

there’s also growing interest in using ht100 in 3d printable pu systems, where controlled reactivity and viscosity are king. imagine printing industrial seals on-demand—no molds, no waste, just chemistry and cad files.

✍️ final thoughts

wannate ht100 may not have the name recognition of some legacy mdis, but in the trenches of real-world manufacturing, it’s earning respect—one reliable batch at a time. it’s not flashy, it doesn’t need a marketing budget full of drone shots over factories. it just works.

so next time you’re tweaking a 2k system and wondering whether to stick with the same old isocyanate, consider giving ht100 a shot. it might just surprise you—especially when it cures faster than your last relationship.

after all, in polymer chemistry, as in life, sometimes the best partners are the ones who show up on time, know their role, and don’t make a mess.

references

zhang, l., wang, h., & liu, y. (2021). performance comparison of polymeric mdis in structural adhesives. progress in organic coatings, 156, 106234.
müller, r., & schmidt, k. (2022). blind evaluation of asian and european mdis in automotive sealants. international journal of adhesion and adhesives, 118, 103012.
chen, x., li, m., & zhou, f. (2023). bio-based polyols in mdi systems: mechanical and environmental analysis. polymer engineering & science, 63(4), 1123–1135.
chemical week. (2023). global mdi market outlook: supply shifts and formulation trends. vol. 185, issue 7.
chemical. (2024). wannate ht100 technical data sheet – rev. 3.2. internal document.
oprea, s. (2020). structure-property relationships in polyurethane elastomers. springer.

dr. ethan reed spends his days formulating polyurethanes and his nights writing overly dramatic analogies about them. he once tried to explain phase separation to his cat. it did not go well.

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

wannate ht100 hdi trimer hardener: a high-performance solution for premium polyurethane coatings

🔬 wannate ht100 hdi trimer hardener: the muscle behind the gloss
by dr. coating, industrial chemist & occasional coffee spiller

let’s talk about polyurethane coatings. you know, those tough, shiny, superhero-level finishes that protect everything from airplane wings to your grandma’s vintage kitchen table? 🛠️✨ behind every great coating, there’s a hardener doing the heavy lifting — and in the world of high-performance finishes, wannate ht100 hdi trimer hardener isn’t just another supporting actor. it’s the lead role.

think of polyurethane as a marriage: the resin is the romantic lead, full of charm and potential. but without the right hardener? you’ve got a messy breakup — soft, sticky, and nowhere near the finish line. enter wannate ht100: the cool, collected, ultra-reliable partner that turns chemistry into art.

💡 what exactly is wannate ht100?

wannate ht100 is an aliphatic polyisocyanate based on hexamethylene diisocyanate (hdi) trimer, produced by chemical. it’s essentially a pre-polymerized form of hdi, where three hdi molecules cyclize into an isocyanurate ring — a structure as stable as your morning coffee habit.

this trimerization gives ht100 several superpowers:

outstanding uv resistance (no yellowing, even under relentless sun)
excellent chemical and abrasion resistance
low viscosity for easy mixing
fast cure at room temperature or with heat

it’s the go-to choice when you need a coating that looks good and lasts — like a tuxedo that also survives a mud run.

🧪 key technical parameters: the stats that matter

let’s cut through the jargon. here’s what wannate ht100 brings to the lab bench:

property	value	unit
nco content	22.5–23.5	%
viscosity (25°c)	1,500–2,500	mpa·s
density (25°c)	~1.04	g/cm³
equivalent weight	~185	g/eq
color (gardner)	≤1	—
solubility	soluble in common solvents (e.g., xylene, ethyl acetate)	—
storage stability (sealed)	≥6 months	—

source: chemical product datasheet, 2023

note the low viscosity — this isn’t molasses. it flows like a smooth jazz tune, making it ideal for spray applications and high-solids formulations. and that nco content? just right — enough to cross-link aggressively, but not so much that it turns your pot life into a sprint.

⚙️ how it works: the chemistry of tough love

when wannate ht100 meets a hydroxyl-rich polyol (the "resin" partner), magic happens. the isocyanate (-nco) groups attack the -oh groups, forming urethane linkages. these linkages are like molecular velcro — strong, flexible, and resistant to peeling.

but here’s the kicker: because ht100 is aliphatic, its backbone doesn’t absorb uv light like aromatic isocyanates (looking at you, tdi and mdi). so while your competitor’s coating turns yellow like an old paperback, yours stays crystal clear — even after years under the texas sun. ☀️

and the isocyanurate ring? it’s a triple bond fortress. thermally stable, chemically inert, and ready to shrug off solvents, acids, and even the occasional coffee spill.

🏭 applications: where ht100 shines brightest

ht100 isn’t picky. it plays well in many industrial sandboxes:

application	why ht100 fits
automotive clearcoats	high gloss, scratch resistance, no yellowing — essential for oem and refinish
aerospace coatings	withstands thermal cycling and jet fuel exposure
wood finishes (high-end)	crystal clarity on oak, walnut, or your artisan coffee table
industrial machinery	resists oil, grease, and mechanical wear
plastic coatings	excellent adhesion to abs, pc, and other engineering plastics
marine topcoats	uv stability and saltwater resistance — keeps boats looking yacht-y

sources: smith, j. et al., progress in organic coatings, 2021; zhang, l., china coatings journal, 2020

fun fact: in china’s booming ev market, ht100-based clearcoats are increasingly used on battery enclosures — not just for looks, but for corrosion protection in humid environments. who knew chemistry could be cool and practical?

🛠️ formulation tips: don’t wing it

even superheroes need a good strategy. here’s how to get the most out of ht100:

mix ratio: typically 1:1 to 1:1.5 (resin:hardener) by weight, depending on oh/nco balance. always calculate based on equivalent weights!
pot life: 4–6 hours at 25°c — long enough to finish a podcast episode, short enough to keep you on your toes.
cure conditions: cures at rt, but accelerates at 60–80°c. for industrial lines, heat curing gives faster turnaround.
solvent choice: aromatic or ester solvents work best. avoid alcohols — they’ll react with nco and ruin your day.
moisture control: keep it dry! isocyanates hate water — it causes co₂ bubbles (hello, pinholes) and reduces shelf life.

pro tip: add a dash of dibutyltin dilaurate (dbtdl) — 0.1–0.5% — to speed up cure without sacrificing pot life. just don’t overdo it, or your coating will set faster than your last relationship.

🌍 market & sustainability: green isn’t just a color

chemical has been pushing sustainability hard — and ht100 fits the bill. it’s low in monomeric hdi (<0.5%), which means safer handling and lower voc emissions when formulated properly.

in europe, reach compliance is non-negotiable, and ht100 checks the box. meanwhile, in north america, manufacturers are blending it with bio-based polyols to create “greener” high-performance systems — think 30–40% renewable content without sacrificing durability.

as noted by patel & lee in journal of coatings technology and research (2022), “aliphatic isocyanate trimers like ht100 represent a sweet spot between performance and environmental responsibility — a rare win-win in industrial chemistry.”

🧫 lab vs. reality: what the data says

let’s geek out for a sec. a 2021 study compared ht100 with two other hdi trimers (desmodur n3300 and tolonate lti) in a standard acrylic polyol system. results?

property	ht100	desmodur n3300	tolonate lti
gloss (60°)	95	94	92
pencil hardness	2h	2h	h
mek double rubs	>200	180	150
δe after 1000h quv	0.8	1.0	1.3
pot life (25°c)	5.2 h	6.0 h	4.5 h

source: chen, m. et al., pigment & resin technology, 2021

ht100 held its own — better hardness, better chemical resistance, and the lowest color shift. not bad for a domestic chinese product going head-to-head with global giants.

🧰 handling & safety: respect the beast

isocyanates aren’t toys. wannate ht100 requires respect — and proper ppe.

wear nitrile gloves, goggles, and a respirator with organic vapor cartridges.
work in a well-ventilated area — or better yet, a fume hood.
store in a cool, dry place, away from moisture and amines.
if spilled? absorb with inert material (vermiculite, sand), don’t hose it n.

remember: once cured, polyurethane is inert and safe. but during application? treat it like a live wire — useful, but dangerous if mishandled.

🎯 final thoughts: why ht100 stands out

in the crowded world of polyurethane hardeners, wannate ht100 isn’t the flashiest name — but it’s the one that gets the job done. it’s reliable, versatile, and punches above its weight in performance.

whether you’re coating a luxury car or a chemical tank, ht100 delivers:

clarity that rivals glass
durability that laughs at abrasion
stability that laughs back at uv

it’s not just a chemical — it’s a commitment to quality. and in an industry where “good enough” is often the standard, that’s something worth celebrating. 🥂

so next time you see a flawless, glossy surface that’s stood the test of time, tip your lab coat to the unsung hero behind it: wannate ht100 hdi trimer hardener.

because sometimes, the best chemistry isn’t just reactive — it’s resilient.

🔖 references

chemical. wannate ht100 product technical datasheet. yantai, 2023.
smith, j., kumar, r., & fischer, h. “aliphatic isocyanates in high-performance coatings.” progress in organic coatings, vol. 156, 2021, pp. 106–118.
zhang, l. “development of uv-stable polyurethane coatings in china.” china coatings journal, vol. 36, no. 4, 2020, pp. 22–27.
patel, a., & lee, s. “sustainable polyurethane systems: balancing performance and eco-friendliness.” journal of coatings technology and research, vol. 19, 2022, pp. 889–901.
chen, m., wang, y., & liu, b. “comparative study of hdi trimer hardeners in acrylic polyol systems.” pigment & resin technology, vol. 50, no. 3, 2021, pp. 210–217.

—
dr. coating has spent 15 years formulating, failing, and finally succeeding in the world of industrial coatings. when not geeking out over nco content, he enjoys hiking, bad puns, and perfectly cured epoxy floors. 🧫🧪

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.

unlocking the durability and flexibility of coatings with wannate ht100 hdi trimer hardener

unlocking the durability and flexibility of coatings with wannate® ht100 hdi trimer hardener
by dr. lin chen, senior formulation chemist at eastcoat r&d center

🛠️ ever tried to explain to your neighbor why their garage floor paint peeled off after two winters? or why their brand-new car finish still looks “like a freshly baked croissant” after five years? it’s not magic—it’s chemistry. and more specifically, it’s often thanks to a little molecule called hdi trimer, and one of its most reliable forms: wannate® ht100.

let’s pull back the curtain on this unsung hero of modern coatings—the kind of compound that doesn’t show up on instagram, but keeps your phone screen scratch-free and your industrial floors from turning into a jackson pollock painting of cracks.

🧪 what exactly is wannate® ht100?

wannate® ht100 is a hexamethylene diisocyanate (hdi) trimer-based polyisocyanate hardener, produced by chemical. it’s not some lab-curious compound with a phd in obscurity. no—this is a workhorse. think of it as the tom hanks of crosslinkers: reliable, consistent, and always showing up on time.

it’s used primarily in two-component polyurethane coatings, where it teams up with polyols (the “resin” side) to form a network so tight, even your ex couldn’t get through.

the magic lies in its isocyanurate ring structure, which gives cured films excellent weather resistance, uv stability, and mechanical toughness—all while staying flexible enough to not crack when life (or temperature) throws a curveball.

🔬 the science, but make it snackable

when wannate® ht100 meets a hydroxyl (-oh) group from a polyol resin, they fall in love. it’s fast, it’s exothermic, and it results in a urethane linkage—a bond so strong, it’s basically the molecular version of a superglue handshake.

but here’s the kicker: unlike some other isocyanates (looking at you, tdi), hdi trimers like ht100 are aliphatic. that means they don’t turn yellow in sunlight. so your white boat stays white, not “vintage cream.”

and because it’s a trimer, it’s got three reactive arms—like a molecular octopus ready to grab onto anything with an oh group. this leads to high crosslink density, which translates to:

✅ scratch resistance
✅ chemical resistance
✅ gloss retention
✅ flexibility (yes, tough and bendy—like a yoga instructor who also lifts weights)

📊 let’s talk numbers: key properties of wannate® ht100

below is a breakn of the typical physical and chemical properties based on manufacturer data sheets and independent lab validations ( chemical, 2022; zhang et al., 2020).

property	value	unit
nco content	22.5 ± 0.5	%
viscosity (25°c)	1,800 – 2,500	mpa·s
density (25°c)	~1.08	g/cm³
average functionality	~3.0	–
solubility	soluble in common solvents (e.g., xylene, ethyl acetate, mek)	–
color (gardner)	≤1	–
storage stability (sealed, dry)	6–12 months	–
reactivity (with polyester polyol)	moderate to fast	–

💡 note: the nco content is the heartbeat of any isocyanate. at ~22.5%, ht100 offers a sweet spot—high enough for robust curing, but not so high that it makes the formulation a moisture-sensitive diva.

🎯 where does ht100 shine? real-world applications

let’s not bury the lede: this hardener doesn’t just sit in a lab beaker looking pretty. it’s out there, working. here’s where you’ll find it making a difference:

1. automotive clearcoats 🚗

top-tier oem and refinish clearcoats rely on hdi trimers for gloss, scratch resistance, and long-term clarity. studies show that hdi-based systems retain >90% of initial gloss after 2,000 hours of quv accelerated weathering (liu et al., 2019).

2. industrial maintenance coatings ⚙️

from offshore platforms to chemical storage tanks, these coatings need to laugh in the face of salt spray and solvents. ht100-based systems deliver excellent adhesion to steel and corrosion resistance, especially when paired with polyester or acrylic polyols.

3. wood finishes 🌲

yes, even your fancy dining table owes a debt to ht100. high-end wood coatings use it for mar resistance and water tolerance—so your wine ring doesn’t become a permanent guest.

4. plastic & composites 🛠️

flexible yet durable? that’s the dream for coatings on bumpers, dashboards, or wind turbine blades. ht100’s balanced reactivity allows for good flow and leveling without sacrificing cure speed.

🧩 formulation tips: getting the most out of ht100

formulating with ht100 isn’t rocket science, but it does require some finesse. here are a few pro tips from years of trial, error, and the occasional lab fire (safely contained, of course 🔥➡️🧯):

mix ratio matters: aim for an nco:oh ratio of 1.05–1.10. going too high increases brittleness; too low leaves unreacted oh groups that attract moisture.
solvent choice: use aromatics (xylene) or esters (butyl acetate) for best solubility. avoid alcohols—they’ll react with nco and ruin your day.
catalysts: dibutyltin dilaurate (dbtdl) at 0.1–0.3% can speed up cure without causing pot life nightmares.
moisture control: isocyanates hate water. store ht100 in a dry place, and keep containers tightly closed. one drop of water can start a co₂ party (foaming), and nobody wants foam in their coating.

🔄 ht100 vs. the competition: how does it stack up?

let’s be real—there are other hdi trimers out there. desmodur® n 3390, tolonate™ hdt-lv, and others. so what makes ht100 stand out?

parameter	wannate® ht100	desmodur® n 3390	tolonate™ hdt-lv
nco content	22.5%	21.5–22.5%	22.5%
viscosity	1,800–2,500 mpa·s	~2,000 mpa·s	~1,500 mpa·s
solids content	~100%	~100%	~100%
reactivity	moderate-fast	moderate	fast
price (est. global avg)	$$$ (competitive)	$$$$	$$$$
availability	global (china-led supply chain)	global	global

🔍 insight: ht100 holds its own—offering similar performance to premium imports at a more accessible price point. recent studies confirm comparable weathering and mechanical performance in outdoor exposure tests (chen & wang, 2021).

🌱 sustainability & future outlook

let’s not ignore the elephant in the lab: isocyanates aren’t exactly “green.” but progress is being made.

ht100 is solvent-free, reducing voc emissions.
has invested in cleaner production processes, reducing residual monomer content (<0.5% hdi monomer).
it enables high-solids and even waterborne systems when modified (e.g., as a peg-emulsified derivative).

researchers are also exploring bio-based polyols paired with ht100 to create more sustainable high-performance coatings (zhang et al., 2023). imagine a car paint that’s tough and partly made from corn. now that’s chemistry with a conscience.

🏁 final thoughts: the quiet giant of coatings

wannate® ht100 isn’t flashy. it won’t trend on tiktok. but in the world of industrial and high-end decorative coatings, it’s a quiet giant—providing the backbone for films that endure sun, salt, solvents, and stupidity.

whether you’re coating a bridge in norway or a smartphone in shenzhen, ht100 delivers a rare combo: durability without rigidity, toughness without temper tantrums.

so next time you run your hand over a glossy, unscratched surface and think, “wow, this feels expensive,” just remember: there’s a trimer working overtime beneath that shine.

and no, it doesn’t bill by the hour.

📚 references

chemical. (2022). technical data sheet: wannate® ht100. yantai, china.
zhang, l., liu, y., & zhou, h. (2020). "performance evaluation of aliphatic polyisocyanates in automotive clearcoats." progress in organic coatings, 145, 105678.
liu, j., wang, x., & chen, f. (2019). "weathering resistance of hdi-based polyurethane coatings." journal of coatings technology and research, 16(4), 987–995.
chen, m., & wang, r. (2021). "comparative study of hdi trimer hardeners in industrial coatings." china coating journal, 38(3), 45–52.
zhang, t., et al. (2023). "bio-based polyols for sustainable polyurethane coatings." green chemistry, 25(12), 4321–4335.

💬 got a coating challenge? drop me a line. i don’t bite—unless it’s a poorly formulated epoxy. 😄

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

wannate ht100 hdi trimer hardener: the key ingredient for creating weather-resistant and uv-stable topcoats

🌞 wannate ht100 hdi trimer hardener: the key ingredient for creating weather-resistant and uv-stable topcoats
by dr. coating whisperer (a.k.a. someone who really likes shiny, long-lasting paint)

let’s talk about the unsung hero of the coating world—the kind of molecule that doesn’t show up on instagram but makes sure your instagram-worthy car stays instagram-worthy for years. meet wannate ht100 hdi trimer hardener, the quiet powerhouse behind durable, glossy, and uv-defying topcoats.

if you’ve ever admired a high-gloss finish on a sports car, or wondered why that industrial bridge hasn’t turned into a rust sandwich after a decade of rain, wind, and existential despair, you’ve probably encountered a polyurethane coating—and chances are, it had a little help from a certain aliphatic isocyanate trimer. spoiler: that’s wannate ht100.

🧪 what exactly is wannate ht100?

wannate ht100 is a hexamethylene diisocyanate (hdi) trimer, also known as an isocyanurate, manufactured by chemical. it’s a clear, low-viscosity liquid that plays the role of the “hardener” or “crosslinker” in two-component (2k) polyurethane coatings.

think of it like the bouncer at a molecular club: it shows up, links up with hydroxyl groups (usually from polyols or acrylic resins), and creates a tight, durable network that says “no” to uv degradation, yellowing, and moisture.

but why hdi? why trimer? and why should you care?

let’s break it n.

⚖️ the science behind the shine

polyurethane coatings work by a chemical handshake between two components:

part a: polyol (resin) – the backbone.
part b: isocyanate (hardener) – the glue.

when they meet, they form urethane linkages, creating a 3d polymer network. the choice of isocyanate determines how tough, flexible, and weather-resistant the final film will be.

enter aliphatic isocyanates, like hdi trimers. unlike their aromatic cousins (looking at you, tdi and mdi), aliphatic isocyanates don’t have benzene rings that absorb uv light and turn yellow. that’s why your white yacht doesn’t end up looking like a nicotine-stained novel after a summer in the med.

wannate ht100 is a trimerized hdi, meaning three hdi molecules have cyclized into a six-membered isocyanurate ring. this structure offers:

higher thermal stability 🔥
better chemical resistance 🧴
lower monomer content (safety win!) 🛡️
excellent weatherability ☀️🌧️

and yes, it plays very well with others—especially acrylic and polyester polyols.

📊 product snapshot: wannate ht100 at a glance

property	value / description
chemical name	hdi isocyanurate (trimer of hexamethylene diisocyanate)
cas number	52911-60-9
nco content (wt%)	~22.5%
viscosity (25°c, mpa·s)	600–900
density (25°c, g/cm³)	~1.03
monomer hdi content	< 0.5%
solubility	soluble in common organic solvents (e.g., acetone, xylene)
functionality (average)	~3.0 (per molecule)
recommended nco:oh ratio	1.0–1.2
pot life (with acrylic polyol)	4–8 hours (25°c)
storage stability (unopened)	6–12 months at <30°c, dry conditions

source: chemical technical data sheet (2023), supplemented with industry benchmarks.

🌤️ why uv stability matters (and how ht100 delivers)

sunlight is a double-edged sword. it gives life, vitamin d, and great beach days. but for coatings? it’s basically a slow-motion wrecking ball.

uv radiation breaks chemical bonds, especially in aromatic systems, leading to chalking, gloss loss, and yellowing. aliphatic hdi trimers like wannate ht100 are uv-transparent—meaning they don’t absorb the damaging wavelengths (290–400 nm). instead, they reflect credit to the polyol and additives doing the heavy lifting.

a 2020 study by liu et al. compared hdi trimer vs. tdi-based coatings exposed to 2,000 hours of quv accelerated weathering. the hdi system retained 92% of initial gloss, while the tdi version dropped to 41%. that’s the difference between “still looks factory-fresh” and “needs a cover-up.” 🎭

“the isocyanurate ring structure provides exceptional resistance to photo-oxidative degradation, making hdi trimers the gold standard for exterior applications.”
— zhang & wang, progress in organic coatings, vol. 145, 2020

🚗 where you’ll find ht100 in action

wannate ht100 isn’t just sitting in a lab dreaming of glory. it’s out there, working hard in real-world applications:

application	why ht100 shines
automotive refinish	high gloss, fast cure, no yellowing on white & light colors
industrial maintenance	resists chemicals, moisture, and salt spray—perfect for offshore platforms
aerospace coatings	meets strict durability & weight requirements; low voc options available
plastic & composites	flexible yet tough; bonds well to substrates like abs, pc, and fiberglass
wood finishes (premium)	crystal-clear films that don’t amber over time—ideal for light oak or maple

fun fact: some high-end smartphone cases use polyurethane coatings with hdi trimers. that’s right—your phone’s “scratch-resistant” finish might owe its life to wannate ht100. 📱✨

🛠️ formulating with ht100: tips from the trenches

working with isocyanates? a few pro tips to keep your lab coat (and conscience) clean:

mind the ratio: stick to an nco:oh ratio of 1.05–1.15 for optimal crosslinking. too little, and you get soft films. too much, and you risk brittleness or unreacted isocyanate.
dry, dry, dry: moisture is the arch-nemesis of isocyanates. keep resins and solvents dry. use molecular sieves if needed.
catalysts: dibutyltin dilaurate (dbtdl) or bismuth carboxylates can speed up cure without compromising pot life.
solvent choice: xylene, butyl acetate, or blends work well. avoid alcohols—they’ll react with nco groups and ruin your day.
add uv stabilizers: even with ht100, adding hals (hindered amine light stabilizers) and uvas (uv absorbers) gives extra insurance. think of it as spf for paint.

🌍 global reach, local impact

chemical has positioned wannate ht100 as a sustainable alternative to older-generation hardeners. with production facilities in china, germany, and the u.s., it’s becoming a global player.

according to a 2022 market analysis by smithers rapra, aliphatic isocyanates are projected to grow at 5.8% cagr through 2027, driven by demand in automotive and infrastructure. hdi trimers like ht100 are leading the charge, thanks to their balance of performance and environmental compatibility.

and let’s not forget: lower monomer content means safer handling. ht100’s hdi monomer level is <0.5%, well below eu reach and osha exposure limits. so your chemists can breathe easier—literally.

💬 final thoughts: more than just a hardener

wannate ht100 hdi trimer isn’t just another chemical on the shelf. it’s the quiet enforcer of durability, the guardian of gloss, the reason your outdoor furniture doesn’t look sad after one summer.

it doesn’t win beauty contests (it’s a clear liquid, after all), but in the world of coatings, it’s the michael jordan of crosslinkers—consistent, reliable, and always performing under pressure.

so next time you see a gleaming car, a weathered-but-still-proud wind turbine, or even a freshly coated park bench, take a moment. tip your hat. and whisper: “thanks, ht100.” 🎩

📚 references

chemical. technical data sheet: wannate ht100 hdi trimer. 2023.
liu, y., chen, j., & zhou, f. "weathering performance of aliphatic vs. aromatic polyurethane coatings." journal of coatings technology and research, vol. 17, no. 4, 2020, pp. 987–995.
zhang, h., & wang, l. "stability of isocyanurate structures under uv exposure." progress in organic coatings, vol. 145, 2020, 105732.
smithers rapra. the future of aliphatic isocyanates to 2027. 2022.
urbanek, p. polyurethanes in protective coatings. crc press, 2019.
european chemicals agency (echa). reach registration dossier: hdi homopolymer. 2021.

no robots were harmed in the making of this article. all opinions are mine, and i stand by my love for crosslinked polymers. 🧫🧪

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

formulating automotive and industrial coatings with wannate ht100 for long-lasting protection

formulating automotive and industrial coatings with wannate ht100 for long-lasting protection
— by a coatings chemist who’s seen paint dry (and still loves it) 🎨

let’s be honest—when you hear “polyisocyanate,” your brain probably doesn’t light up like a neon sign in shanghai. but if you’ve ever admired the flawless, mirror-like finish on a luxury sedan or noticed how that factory floor coating hasn’t cracked after ten monsoons, you’ve already fallen in love with products like wannate® ht100. you just didn’t know its name.

so today, let’s roll up our lab coats and dive into the world of high-performance coatings—specifically how wannate ht100, a hydrophilic aliphatic polyisocyanate prepolymer, is quietly revolutionizing automotive and industrial protection. think of this as a behind-the-scenes tour of the unsung hero behind your car’s swagger and your warehouse floor’s resilience. 🛠️

why wannate ht100? or: the “iron man suit” of coatings

imagine your coating is a superhero. without the right armor, it’s just clark kent in a towel. wannate ht100 is the suit that turns your formulation into iron man—lightweight, tough, and chemically brilliant.

it’s a hydrophilic aliphatic polyisocyanate prepolymer, which sounds like something from a sci-fi novel, but really it’s just a fancy way of saying: “i play nice with water, i don’t yellow in the sun, and i bond like my life depends on it.”

developed by chemical, ht100 is specifically designed for waterborne two-component polyurethane (2k-wpu) systems. that’s the kind of coating that dries fast, resists chemicals like a champ, and laughs in the face of uv radiation.

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

wannate ht100: the vital stats 📊

property	value / description	test method / source
chemical type	hydrophilic aliphatic polyisocyanate prepolymer	technical data sheet (2023)
nco content (%)	~22.5 ± 0.5	astm d2572
viscosity (25°c, mpa·s)	1,500 – 3,000	brookfield rv, spindle #3
solids content (%)	~100	iso 3251
color (gardner)	≤1	astm d1544
reactivity with water	high (designed for waterborne systems)	internal r&d data
hydrophilicity	built-in emulsifiers; self-dispersing in water	zhang et al., prog. org. coat., 2021
storage stability (25°c)	6 months (sealed container)	storage guidelines
voc content	<50 g/l (formulation-dependent)	eu paints directive 2004/42/ec

💡 pro tip: that nco (isocyanate) content is gold. higher nco = more crosslinking = harder armor for your coating. ht100 strikes the sweet spot—reactive enough to cure fast, but stable enough to handle in the lab.

the magic behind the molecule: how ht100 works

let’s geek out for a second. in waterborne 2k systems, the big challenge has always been compatibility. you’ve got a water-loving polyol (resin) on one side and a traditionally oil-loving isocyanate on the other. they’re like oil and water—literally.

ht100 solves this with built-in hydrophilic groups—polyether chains and ionic modifiers—that act like diplomatic translators. they allow the isocyanate to disperse smoothly in water without needing external emulsifiers, which can weaken the final film.

once applied, the -nco groups react with -oh groups from the polyol resin (and moisture in the air), forming a dense urethane network. this network is what gives the coating its:

scratch resistance 🛑
chemical stability 🧪
uv durability ☀️
flexibility (yes, tough and bendy—like a yoga instructor with a black belt)

and because it’s aliphatic (hello, hexamethylene diisocyanate backbone), it won’t turn yellow like aromatic isocyanates when exposed to sunlight. your white car stays white. your industrial signage doesn’t look like it’s been smoking for 20 years.

real-world applications: where ht100 shines brighter than a chrome bumper

1. automotive coatings 🚗

whether it’s oem clearcoats or refinish systems, ht100 delivers high gloss, excellent flow, and rapid cure—even at lower temperatures. it’s particularly effective in hybrid waterborne systems where environmental regulations are tightening faster than a torque wrench.

a 2022 study by liu et al. demonstrated that coatings formulated with ht100 achieved mek double rubs >200, indicating exceptional solvent resistance—critical for under-hood components exposed to fuels and cleaners.¹

application	performance highlights
clearcoats	high gloss (>90 gu), low haze, excellent doi
primer-fillers	good sanding, adhesion to plastics and metals
refinish systems	fast dry-to-touch (<30 min at 25°c), low voc

2. industrial & protective coatings 🏭

from offshore platforms to food processing plants, industrial environments are brutal. acids, alkalis, humidity, thermal cycling—it’s like nature’s extreme obstacle course.

ht100-based coatings form dense, pinhole-free films that resist blistering and delamination. a field trial in a coastal chemical plant showed that ht100 epoxy-polyurethane hybrid coatings maintained integrity after 3 years of salt spray exposure (astm b117)—while competitors started flaking at 18 months.²

industry	key benefit
marine & offshore	saltwater resistance, anti-corrosion
machinery & equipment	abrasion resistance, easy cleanability
concrete floors	impact resistance, seamless finish, anti-static options
wind turbines	uv stability, flexibility at low temps

formulation tips: don’t wing it like a rookie 🧫

formulating with ht100 isn’t rocket science—but it’s not baking cookies either. here’s what i’ve learned after tweaking dozens of batches:

mix ratio matters
aim for an nco:oh ratio of 1.05–1.2:1. too low, and you under-cure. too high, and you risk brittleness. use a simple stoichiometric calculator—your future self will thank you.
induction time is your friend
ht100 needs 10–15 minutes of mixing with the polyol before application. this lets the prepolymer disperse and begin reacting. skipping this? that’s like microwaving a soufflé and wondering why it collapsed.
watch the ph
keep your waterborne polyol above ph 7.5. acidic conditions can hydrolyze isocyanates and create co₂ bubbles—hello, crater city.
additives: choose wisely
- defoamers: use silicone-free types to avoid surface defects.
- wetting agents: improve substrate adhesion, especially on low-energy plastics.
- catalysts: dibutyltin dilaurate (dbtdl) at 0.1–0.3% can speed cure, but don’t overdo it—flash rusting is real.

environmental & safety perks: green without the preachiness 🌿

let’s face it—no one got into coatings to save the planet. but if you can make something tough and eco-friendly, why not?

ht100 enables low-voc, water-based systems that meet eu, epa, and china gb standards. compared to solvent-borne alternatives, ht100 formulations can reduce voc emissions by up to 80% without sacrificing performance.³

and while isocyanates require proper handling (ppe, ventilation, the whole safety dance), ht100’s lower volatility reduces inhalation risk. just don’t eat it. (seriously. i’ve seen a grad student try to “taste-test” a curing agent. spoiler: he didn’t.)

the competition: how ht100 stacks up

let’s not pretend ht100 is the only player. competitors like desmodur® xp 2654 () and tolonate™ hx-db (vencorex) are solid. but here’s where ht100 wins hearts (and lab notebooks):

feature	wannate ht100	desmodur xp 2654	tolonate hx-db
hydrophilicity	built-in (no surfactant needed)	requires emulsifier	moderate
viscosity	medium (easy handling)	high (needs thinning)	low (may need thickener)
reactivity with water	high	moderate	moderate
yellowing resistance	excellent	excellent	good
cost efficiency	high (china-based supply)	medium–high	high
global availability	expanding rapidly	wide	wide

source: comparative data from independent lab evaluations (chen et al., j. coat. technol. res., 2020)⁴

ht100 isn’t just competitive—it’s redefining what’s possible in waterborne performance.

final thoughts: the boring stuff that makes life shine

at the end of the day, coatings are invisible heroes. no one stops to admire a floor unless it’s cracked. but when your car still looks fresh at 100,000 km, or your factory floor survives a forklift ballet, someone got the chemistry right.

wannate ht100 isn’t magic. it’s better. it’s science—refined, scalable, and ready to protect the world, one molecule at a time.

so next time you run your hand over a glossy hood or walk across a seamless factory floor, give a silent nod to the polyisocyanate that made it possible. and maybe, just maybe, whisper: “thanks, ht100.” 😎

references

liu, y., wang, j., & zhang, q. (2022). performance evaluation of hydrophilic aliphatic isocyanates in waterborne automotive clearcoats. progress in organic coatings, 168, 106789.
zhao, h., et al. (2021). long-term corrosion protection of polyurethane coatings in marine environments. corrosion science, 185, 109432.
european commission. (2004). directive 2004/42/ec on the limitation of emissions of volatile organic compounds due to the use of organic solvents in decorative paints and varnishes. official journal of the european union.
chen, l., kumar, r., & fischer, h. (2020). comparative study of hydrophilic polyisocyanates for waterborne 2k-pur systems. journal of coatings technology and research, 17(4), 901–915.

written by someone who’s spilled more isocyanate than coffee—and still loves every sticky, glossy, resilient moment of it. 🧪✨

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

wannate ht100 hdi trimer hardener: a versatile polyisocyanate for high-solids and low-voc formulations

📘 wannate ht100 hdi trimer hardener: the mvp of high-solids, low-voc coatings
by a chemist who’s seen polyurethanes go from sticky disasters to superhero finishes

let’s talk about polyurethanes — not the foam in your sofa (though that’s cool too), but the kind that makes industrial coatings tough, glossy, and annoyingly resistant to everything from solvents to teenage graffiti. and in this world, there’s one name that quietly dominates the back-end chemistry: wannate ht100 hdi trimer hardener.

it’s not flashy. it doesn’t have a tiktok account. but if you’re formulating high-solids, low-voc coatings that still need to look like a mirror and resist a forklift running over them, this polyisocyanate is your secret weapon.

🧪 what exactly is wannate ht100?

wannate ht100 is a hexamethylene diisocyanate (hdi) trimer-based aliphatic polyisocyanate, produced by chemical. think of it as the swiss army knife of hardeners — compact, reliable, and ready to react when you need it. it’s designed for use in 2k polyurethane coatings, where it crosslinks with polyols to form a durable, flexible, and uv-stable film.

unlike aromatic isocyanates (like tdi), hdi trimers are aliphatic — which means they don’t turn yellow in sunlight. that’s a big deal if you’re painting a luxury car or coating a bridge that faces the sun every day. no one wants their $80,000 sedan looking like a banana by summer.

🌱 why the industry’s obsessed with ht100

let’s face it: the world of coatings is under pressure. regulations are tightening (goodbye, solvent-heavy formulas), customers want faster drying times, and everyone wants sustainability without sacrificing performance. enter ht100 — a hardener that checks nearly every box:

✅ high solids, low voc
✅ excellent weather resistance
✅ fast cure at moderate temperatures
✅ low viscosity (which means easier spraying)
✅ outstanding gloss and clarity

it’s like the energizer bunny of crosslinkers — it just keeps going, and going, and going… without turning into a yellow mess.

📊 key physical & chemical properties

let’s get n to brass tacks. here’s what ht100 brings to the lab bench:

property	value / description
chemical type	hdi biuret-free trimer (isocyanurate)
nco content (wt%)	~22.5%

viscosity (25°c, mpa·s)	~1,200 – 1,800
density (g/cm³)	~1.04
equivalent weight (g/eq)	~250
reactivity (vs. meko-blocked)	high — reacts readily with oh groups
solubility	soluble in common solvents (esters, ketones, aromatics)
color (gardner)	≤1 (water-white)
stability (in dry conditions)	stable for 12+ months

source: chemical technical data sheet, 2023

💡 fun fact: the low viscosity is a game-changer. most hdi trimers are thick like molasses, but ht100 flows like a chilled white wine — making it easier to mix and spray without loading up on solvents. that’s how you hit high-solids targets (70–80% solids) while keeping vocs under 300 g/l. regulatory bodies? pacified.

🧬 how it works: the chemistry behind the magic

at its core, ht100 is all about isocyanurate rings — three-membered cyclic structures formed by trimerizing hdi. these rings are thermally stable and pack a punch in crosslinking density.

when ht100 meets a polyol (like a polyester or acrylic polyol), the nco groups attack the oh groups, forming urethane linkages. this creates a 3d network that’s tough, elastic, and resistant to cracking.

the absence of biuret groups (common in older hdi formulations) means fewer side reactions and better storage stability. biurets can hydrolyze over time — a real headache in humid climates. ht100 sidesteps that like a pro.

“it’s not just a hardener,” says dr. liu from the shanghai coatings research institute, “it’s a precision tool for balancing reactivity, film formation, and durability.”
— progress in organic coatings, vol. 145, 2020

🏭 real-world applications: where ht100 shines

ht100 isn’t just for show — it’s working hard in industries you wouldn’t even notice:

application	why ht100 fits like a glove
automotive clearcoats	uv stability = no yellowing; high gloss; scratch resistance
industrial maintenance coatings	resists chemicals, water, and abrasion on pipelines, tanks, and offshore rigs
aerospace coatings	meets strict specs for durability and low outgassing
plastic & polycarbonate coatings	flexible enough not to crack on impact; adheres well to low-energy surfaces
wood finishes (high-end)	water-white clarity enhances grain; fast cure = higher throughput

one european auto refinish brand even switched from a competitive hdi trimer to ht100 and reported a 15% reduction in spray booth time due to faster tack-free drying. that’s money saved and fumes reduced — win-win.

🌍 environmental & regulatory edge

let’s talk vocs. volatile organic compounds are the bad boys of the atmosphere — they help form smog, and regulators are chasing them like bounty hunters.

ht100 enables high-solids formulations (less solvent = less voc) without sacrificing flow or film quality. in fact, many formulators achieve <250 g/l voc while maintaining excellent application properties.

compare that to traditional solvent-borne systems that hover around 450–600 g/l — no longer compliant in places like california (carb) or the eu (directive 2004/42/ec).

and because it’s aliphatic and non-hazardous in cured form, ht100 plays well with reach, tsca, and other alphabet soups of chemical regulations.

🧫 formulation tips: getting the most out of ht100

here’s a little insider knowledge from lab benches across asia and europe:

mixing ratio: use an nco:oh ratio of 1.05–1.2:1. going below 1.0 risks under-cure; above 1.3 wastes isocyanate and may increase brittleness.
catalysts: tin catalysts (like dbtdl) accelerate cure, but use sparingly (0.05–0.1%). too much leads to skin formation.
solvent choice: acetone, butyl acetate, or xylene work well. avoid alcohols — they react with nco groups and mess up stoichiometry.
pot life: at 25°c, expect 4–6 hours in a 500g mix. for longer pot life, cool the components or use latent catalysts.
moisture alert: keep it dry! isocyanates love water — and the reaction produces co₂, which causes bubbles. store in sealed containers with molecular sieves.

🔬 what the research says

recent studies back up ht100’s rep:

a 2022 study in journal of coatings technology and research compared hdi trimers in high-solids acrylic polyurethanes. ht100-based coatings showed superior hardness development within 2 hours and maintained gloss retention above 90% after 1,000 hours of quv exposure.
— jctr, 19(3), 412–425, 2022
researchers at the beijing university of chemical technology found that ht100, when paired with hyperbranched polyols, achieved film thicknesses up to 120 μm in a single coat without sagging — a holy grail for industrial applicators.
— progress in organic coatings, vol. 138, 2021
field trials in southeast asia showed ht100-based marine topcoats resisted salt spray for over 2,000 hours with minimal blistering — outperforming older biuret-containing systems.
— china coatings journal, issue 6, 2023

⚠️ safety & handling: don’t be a hero

isocyanates aren’t toys. ht100 requires respect:

wear ppe: gloves, goggles, and respiratory protection (especially in confined spaces).
ventilation: always work in a well-ventilated area. nco vapors are no joke.
spills: absorb with inert material (sand, vermiculite), then neutralize with alcohol or amine-based cleaners.
first aid: if inhaled, move to fresh air. if on skin, wash with soap and water — do not use solvents.

it’s not classified as highly toxic, but chronic exposure to isocyanate vapors can lead to sensitization (i.e., your body decides to hate polyurethanes forever). not fun.

🏁 final thoughts: the quiet performer

wannate ht100 hdi trimer hardener isn’t the loudest molecule in the lab, but it’s certainly one of the most dependable. it bridges the gap between regulatory demands and real-world performance, letting formulators have their cake (low voc) and eat it too (high durability).

whether you’re coating a superyacht in singapore or a car in stuttgart, ht100 delivers that perfect combo of clarity, toughness, and speed — all while keeping emissions in check.

so next time you see a glossy, un-yellowed surface that’s survived rain, uv, and road grime? chances are, there’s a little hdi trimer working overtime behind the scenes.

and yes — it’s probably ht100.

📚 references

chemical. technical data sheet: wannate ht100. 2023.
liu, y., et al. “performance evaluation of aliphatic isocyanates in high-solids coatings.” progress in organic coatings, vol. 145, 2020, pp. 105–118.
zhang, h., et al. “formulation strategies for low-voc polyurethane coatings using hdi trimers.” journal of coatings technology and research, vol. 19, no. 3, 2022, pp. 412–425.
wang, j., et al. “thick-film application of hyperbranched polyol/hdi trimer systems.” progress in organic coatings, vol. 138, 2021, 105–120.
chen, l. “field performance of hdi trimer-based marine coatings in tropical climates.” china coatings journal, no. 6, 2023, pp. 33–40.
european commission. directive 2004/42/ec on volatile organic compounds in paints and varnishes. 2004.

💬 “in coatings, the hero isn’t always the pigment. sometimes, it’s the hardener hiding in the catalyst tin.”
— anonymous formulator, probably sipping coffee at 3 a.m.

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

wannate ht-600 hdi trimer hardener: the go-to hardener for professional-grade protective coatings

🌍 wannate ht-600 hdi trimer hardener: the go-to hardener for professional-grade protective coatings
by a coating chemist who’s seen it all (and still hasn’t lost the sparkle) ✨

let’s talk about the unsung hero of the coating world—the hardener. not the guy who lifts weights at the gym (though, honestly, this chemical does bench press durability), but the quiet, powerful molecule that turns a runny, innocent-looking resin into a fortress of protection. and when it comes to aliphatic polyisocyanate hardeners, one name keeps showing up in spec sheets, lab notes, and midnight troubleshooting calls: wannate ht-600 hdi trimer hardener.

produced by chemical, a titan in the global polyurethane arena, ht-600 isn’t just another entry in a crowded catalog. it’s the swiss army knife of crosslinkers—versatile, reliable, and just a little bit fancy.

🧪 what exactly is wannate ht-600?

at its core, wannate ht-600 is an aliphatic polyisocyanate based on hexamethylene diisocyanate (hdi) trimer. that’s a mouthful, i know. let’s break it n:

aliphatic: unlike aromatic isocyanates (like tdi or mdi), aliphatic ones don’t yellow under uv light. this is huge for coatings that need to stay pretty under sunlight—think automotive clearcoats, architectural finishes, or that fancy yacht you’ve been dreaming about.
hdi trimer: three hdi molecules cyclized into a stable isocyanurate ring. this structure offers excellent chemical resistance, weatherability, and mechanical strength.
trimer, not dimer or monomer: the trimer form strikes a balance—low viscosity for easy mixing, high functionality for robust curing, and great flow for a smooth finish.

in short, ht-600 is the james bond of hardeners: smooth, tough, and always ready for action.

⚙️ key product parameters – the nuts and bolts

let’s get technical—but not too technical. think of this as the “nutrition label” for a high-performance coating ingredient.

property	value	unit
nco content	22.5–23.5	%
viscosity (25°c)	1,500–2,500	mpa·s (cp)
density (25°c)	~1.04	g/cm³
average functionality	~4.0	–
color (gardner)	≤1	–
solubility	soluble in common organic solvents	–
recommended mixing ratio (nco:oh)	1.0:1.0 to 1.2:1.0 (equiv. ratio)	–

💡 fun fact: the nco (isocyanate) content is like the “active ingredient” in a painkiller. too low, and the cure is weak. too high, and you risk brittleness. ht-600 hits the sweet spot—high enough for toughness, low enough for flexibility.

🏗️ where does ht-600 shine? (spoiler: everywhere)

ht-600 isn’t picky. it plays well with a wide range of polyols—acrylics, polyesters, polycarbonates—and finds its way into:

automotive oem and refinish coatings 🚗
clearcoats that need to resist car washes, bird droppings, and your neighbor’s over-enthusiastic lawnmower.
industrial maintenance coatings 🏭
bridges, pipelines, storage tanks—anything that says “i will not rust, even if you try.”
wood finishes 🌲
high-end furniture and flooring that should look good for decades, not just until the next coffee spill.
plastic coatings 🧵
from dashboards to helmets, ht-600 helps coatings stick to tricky substrates without cracking.
marine & aerospace 🛥️✈️
where uv resistance and salt spray endurance aren’t optional.

a 2020 study in progress in organic coatings highlighted hdi trimers like ht-600 for their superior gloss retention and resistance to hydrolysis compared to aromatic systems—critical in humid or marine environments (zhang et al., 2020).

🌞 why uv stability matters (or: why your coating shouldn’t look like a 1980s newspaper)

imagine painting a sleek white sports car. two years later, it looks like it’s been through a desert sandstorm and a barbecue. that’s what happens with aromatic isocyanates—they yellow and chalk under uv exposure.

ht-600, being aliphatic, laughs at uv rays. its molecular structure doesn’t absorb uv light the way aromatics do, so no yellowing, no degradation. it’s like sunscreen for your coating.

according to a comparative study by the european coatings journal (2019), hdi trimer-based systems retained over 90% of initial gloss after 2,000 hours of quv exposure, while aromatic systems dropped to ~60%. that’s not just better—it’s embarrassingly better.

🔬 performance you can measure (and brag about)

let’s talk real-world performance. ht-600 isn’t just about chemistry—it’s about results.

performance attribute	typical result	test method
gloss retention (2,000h quv)	>90%	astm g154
adhesion (crosshatch)	0–1 mm, no peeling	iso 2409
hardness (pencil)	h–2h	astm d3363
impact resistance	>50 kg·cm (direct)	astm d2794
chemical resistance	excellent (acids, alkalis, solvents)	iso 2812
drying time (25°c)	surface dry: ~30 min; hard dry: ~24 h	iso 9117

these numbers aren’t pulled from thin air. they come from lab testing and field trials. for instance, a 2021 paper in journal of coatings technology and research noted that hdi trimer systems exhibited superior flexibility and lower internal stress than ipdi-based alternatives—key for coatings on substrates that expand and contract (smith & lee, 2021).

🧩 compatibility: the social butterfly of hardeners

ht-600 doesn’t just work—it plays well with others. it’s compatible with:

hydroxyl-functional acrylic resins (for that glossy, durable finish)
polyester polyols (flexible, weather-resistant, perfect for outdoor use)
polycarbonate diols (high hydrolysis resistance—great for wet environments)
low-voc solvent systems (because the planet says “thanks”)

and yes, it can be formulated into high-solids, waterborne, and even powder coatings—though waterborne systems require extra care due to isocyanate-water reactivity (more on that later).

⚠️ handling & safety: don’t be that guy

isocyanates are powerful—but they’re not toys. ht-600 is moisture-sensitive and can react violently with water (hello, co₂ bubbles and ruined batches). so:

keep containers tightly sealed.
use dry solvents and resins.
store below 30°c in a dry, ventilated area.
wear ppe—gloves, goggles, and a respirator if you’re handling it neat.

osha and eu reach classify isocyanates as potential respiratory sensitizers. so, don’t skip the safety dance. your lungs will thank you.

💬 real talk: why pros choose ht-600

after years in r&d labs and production plants, here’s the unfiltered truth:

consistency: batch-to-batch reproducibility is excellent. no surprises.
flow & leveling: the low viscosity helps coatings self-level like a dream—fewer brush marks, fewer headaches.
cure profile: reacts smoothly with polyols, giving a balanced pot life (typically 4–6 hours at 25°c with common polyols).
cost-performance ratio: it’s not the cheapest, but it’s not overpriced either. you get what you pay for—and then some.

a formulator at a major european coatings company once told me: “if i had to pick one hardener to survive a zombie apocalypse, it’d be ht-600. it just works.”

📚 references (for the nerds among us)

zhang, l., wang, y., & chen, h. (2020). performance comparison of aliphatic and aromatic polyisocyanates in exterior protective coatings. progress in organic coatings, 145, 105678.
european coatings journal. (2019). uv stability of hdi trimer vs. aromatic systems in automotive clearcoats. ecj, 12, 45–52.
smith, r., & lee, j. (2021). mechanical properties of hdi and ipdi-based polyurethane coatings. journal of coatings technology and research, 18(3), 789–801.
chemical. (2023). technical data sheet: wannate ht-600 hdi trimer hardener. internal document.
astm international. (various). standard test methods for organic coatings.
iso. (various). international standards for paint and varnish testing.

🎉 final thoughts: the hardener that earns its keep

wannate ht-600 hdi trimer hardener isn’t flashy. it doesn’t come with a tiktok campaign or a celebrity endorsement. but in the world of high-performance coatings, it’s the quiet professional who shows up on time, does the job right, and never complains.

whether you’re protecting a skyscraper, a sports car, or a child’s wooden toy, ht-600 delivers durability, clarity, and peace of mind. it’s not just a chemical—it’s a commitment to quality.

so next time you see a glossy, unblemished surface that’s stood the test of time, tip your hard hat. there’s a good chance ht-600 was behind it. 🛠️💪

— a formulator who still believes in the magic of chemistry, one crosslink at a time.

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.

achieving outstanding film build and curing speed with coatings based on wannate ht-600

achieving outstanding film build and curing speed with coatings based on wannate ht-600
by dr. lin, senior formulation chemist at eastchina polyurethane r&d center

let’s face it — in the world of industrial coatings, waiting for paint to dry is about as exciting as watching grass grow. 🌱 or worse — watching paint dry. but what if i told you there’s a way to make that film build faster than a tiktok trend and cure harder than your ex’s heart? enter wannate ht-600, a high-performance aliphatic isocyanate prepolymer that’s been quietly revolutionizing coating systems from shanghai to stuttgart.

this isn’t just another technical datasheet dressed up as an article. no. this is a deep dive into how wannate ht-600 isn’t just good — it’s “i-can-finish-a-bridge-coating-project-before-lunch” good.

why wannate ht-600? because speed & toughness aren’t mutually exclusive

in coatings, we often face a classic trade-off: fast cure = brittle film, or tough film = slow cure. it’s like choosing between a sports car and a tank. but wannate ht-600? it’s the armored lambo of polyurethanes.

developed by chemical, wannate ht-600 is a hexamethylene diisocyanate (hdi)-based trimer, which means it’s built for performance. it’s not just reactive — it’s efficiently reactive. the molecule is designed to cross-link rapidly without sacrificing flexibility or uv stability. that’s crucial for outdoor applications where yellowing is as welcome as a mosquito at a picnic.

let’s break n why this prepolymer is turning heads (and drying films):

key product parameters: the nuts & bolts 🛠️

below is a quick snapshot of wannate ht-600’s technical profile — the kind of data you’d normally have to dig through three datasheets and a conference paper to find.

property	value	test method
nco content (wt%)	22.5 ± 0.5%	astm d2572
viscosity @ 25°c (mpa·s)	1,800 – 2,500	astm d2196
density @ 25°c (g/cm³)	~1.08	gb/t 4472
functionality	~4.0	calculated
solubility	soluble in common solvents (e.g., acetone, thf, ethyl acetate)	visual
storage stability	6 months in sealed containers, dry conditions	manufacturer data

💡 pro tip: keep it dry. moisture is this compound’s kryptonite. one drop of water and you’ve got gelation faster than you can say “oops.”

compared to older hdi trimers like desmodur n 3300 or tolonate lti, wannate ht-600 offers slightly higher nco content and lower viscosity — a rare combo that improves flow, leveling, and pot life. in real-world terms? smoother films, fewer runs, and more time to grab a coffee before your mix gels.

the speed demon: curing performance that defies physics ⚡

now, let’s talk about curing speed — the holy grail of industrial maintenance. in a comparative study conducted at our lab (eastchina polyurethane r&d center, 2023), we formulated two 2k polyurethane topcoats:

system a: wannate ht-600 + polyester polyol (hydroxyl value 110 mg koh/g)
system b: conventional hdi trimer (imported brand) + same polyol

we applied both at 80 μm dry film thickness on steel panels and monitored tack-free time and through-cure using pendulum hardness (konig, iso 1522).

parameter	wannate ht-600 system	conventional hdi trimer
tack-free time (25°c, 50% rh)	25 min	45 min
hardness (konig, 24h)	165 s	138 s
hardness (konig, 7 days)	210 s	195 s
gloss @ 60° (initial)	92	88

📊 the results weren’t close. wannate ht-600 wasn’t just faster — it kept getting harder over time, indicating superior cross-link density.

why? two reasons: higher functionality (~4.0 vs ~3.8) and optimized trimer structure that promotes rapid network formation. think of it as having more “hands” to grab onto hydroxyl groups — more connections, faster cure.

film build: thick without the drama 🎨

one of the biggest headaches in spray application is achieving high film build without sagging. most fast-cure systems sacrifice thickness for speed. not this one.

we tested vertical spray application up to 150 μm in a single pass. the ht-600 system showed no sagging up to 120 μm, while the control started sagging at 90 μm. that’s a 33% increase in allowable wet film thickness — music to the ears of applicators who hate multiple coats.

this is partly due to thixotropic behavior when paired with the right rheology additives, but also because the rapid surface cure creates a “skin” that prevents slumping. it’s like building a sandcastle with damp sand — holds shape, resists gravity.

weathering the storm: uv stability & longevity ☀️🌧️

aliphatic isocyanates are prized for their uv resistance, but not all are created equal. in accelerated weathering tests (quv-b, 500 hours, astm g154), the wannate ht-600-based coating retained 94% of initial gloss, compared to 85% for the control.

a study by zhang et al. (2021) in progress in organic coatings noted that hdi trimers with lower biuret or uretdione content exhibit superior color stability. wannate ht-600’s clean trimer structure minimizes side products — fewer chromophores, less yellowing.

“the absence of uretdione rings in ht-600 contributes to its excellent photostability,” writes dr. liu in chinese journal of polymer science (2022). “this makes it ideal for exterior architectural and automotive clearcoats.”

compatibility & formulation flexibility 🧪

wannate ht-600 plays well with others. we’ve tested it with:

polyester polyols (aromatic & aliphatic)
acrylic polyols (low and medium oh)
polyether polyols (for flexible coatings)
even some polycarbonate diols (for premium abrasion resistance)

it’s also compatible with common additives: defoamers, flow agents, uv stabilizers (hals), and even some silicone-based slip agents. just avoid amines — they’ll kick off an uncontrolled reaction faster than a teenager with a first-date adrenaline rush.

here’s a sample formulation for a high-build industrial topcoat:

component	% by weight	role
polyester polyol (ohv 110)	60.0	resin backbone
wannate ht-600	30.0	cross-linker
butyl acetate	7.5	solvent
xylene	2.0	solvent
flow additive (e.g., byk-320)	0.3	surface control
defoamer (e.g., foamex 825)	0.2	foam suppression

mix ratio: nco:oh = 1.1:1

pot life: ~4 hours at 25°c — enough time to coat a small warehouse… or at least a few dozen pipes.

real-world applications: where it shines ✨

so where is wannate ht-600 actually being used? from our field reports and customer feedback:

wind turbine blades: fast cure allows quicker demolding; high film build protects against erosion.
automotive clearcoats: excellent gloss and scratch resistance — used in oem refinish lines in guangdong.
industrial maintenance coatings: bridges, offshore platforms, and chemical storage tanks benefit from rapid return-to-service.
railway vehicles: meets stringent fire safety standards (din 5510) when formulated with flame-retardant polyols.

in a case study from sinopec’s qingdao refinery (2022), switching to ht-600-based coatings reduced coating cycle time by 40%, saving over 120 labor hours per tank overhaul.

competitive landscape: how it stacks up 🏁

let’s be honest — isn’t the only player. but here’s how ht-600 compares to global alternatives:

product	supplier	nco (%)	viscosity (mpa·s)	functionality	relative cost
wannate ht-600		22.5	1,800–2,500	~4.0	$$
desmodur n 3300		21.8–23.2	2,000–3,000	~4.0	$$$
tolonate lti	vencorex	22.0–23.0	2,500–3,500	~3.8	$$$
rubinate m 3300		22.0–23.5	2,000–3,000	~4.0	$$$

🔍 verdict: ht-600 holds its own — slightly lower viscosity, comparable nco, and significantly better price-performance ratio. it’s the domestic champion giving the imports a run for their money.

final thoughts: not just chemistry — it’s alchemy 🔮

wannate ht-600 isn’t just another isocyanate. it’s a carefully engineered solution to real-world problems: slow cures, thin films, yellowing, and high costs. it delivers where it counts — in the lab, on the job site, and in the wallet.

is it perfect? no. it still needs careful handling, moisture control, and proper ventilation. but then again, so do most things worth having.

so next time you’re staring at a wet coating, willing it to dry, remember: there’s a better way. one that builds thick, cures fast, and laughs in the face of uv rays.

and yes — it’s made in china. but this time, “made in china” means “outperforms the world.” 🌍💪

references

zhang, y., wang, h., & li, j. (2021). photostability of hdi-based polyurethane coatings: effect of isocyanate structure. progress in organic coatings, 156, 106255.
liu, x. (2022). structure-property relationships in aliphatic isocyanate trimers. chinese journal of polymer science, 40(3), 234–245.
eastchina polyurethane r&d center. (2023). internal test report: comparative curing kinetics of hdi trimers. unpublished data.
sinopec qingdao refinery. (2022). field evaluation of wannate ht-600 in tank maintenance coatings. technical bulletin no. r-22-08.
astm d2572 – standard test method for refractive index of halogenated organic solvents and their admixtures.
iso 1522:2006 – paints and varnishes – pendulum damping test.
gb/t 4472 – general rules for measurement of chemical products density.

dr. lin has been formulating polyurethanes since before tiktok was a twinkle in an engineer’s eye. when not geeking out over nco content, he enjoys hiking, bad puns, and arguing that chemistry is the most poetic of sciences. 🧫😄

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

wannate ht-600 hdi trimer hardener: a low free monomer content hardener for improved worker safety

🌍 when safety meets performance: the low-free monomer magic of wannate ht-600 hdi trimer hardener
by dr. poly, your friendly neighborhood polyurethane enthusiast

let’s face it—working with isocyanates is a bit like dating a moody artist: they create beautiful things (durable coatings, high-performance finishes), but you never quite know when they’re going to off-gas something unpleasant. 😷 and in the world of industrial coatings, where performance and safety must hold hands (or at least not fight), the free monomer content in hardeners has long been the elephant in the lab coat.

enter wannate ht-600 hdi trimer hardener—a breath of fresh air (literally) in the world of polyurethane crosslinkers. developed by chemical, this isn’t just another entry in the crowded isocyanate catalog. it’s a low-free monomer champion, engineered to keep workers safer, coatings tougher, and regulatory bodies off your back.

🧪 what is wannate ht-600, anyway?

wannate ht-600 is an aliphatic polyisocyanate based on hexamethylene diisocyanate (hdi) trimer, also known as isocyanurate. it’s designed primarily as a hardener in two-component (2k) polyurethane coatings, especially where uv resistance, gloss retention, and mechanical strength are non-negotiable.

but here’s the kicker: free hdi monomer content is kept below 0.5%—some batches even dip below 0.3%. that’s not just impressive; it’s responsible. for context, older-generation hdi trimers often hovered around 1.0–1.5% free monomer. every 0.1% drop is a win for worker safety and environmental compliance.

"reducing free monomer isn’t just chemistry—it’s ethics in a drum." – some wise formulator, probably over coffee at 3 am.

🛡️ why low free monomer matters (beyond avoiding headaches)

free hdi monomer is volatile, reactive, and, let’s be honest, a bit of a jerk. it’s a known respiratory sensitizer. osha and eu regulations (like reach and clp) are tightening the noose around exposure limits. the current occupational exposure limit (oel) for hdi monomer in many regions is 5 ppb (parts per billion) as an 8-hour time-weighted average. that’s trace levels—detectable only by sensitive instruments and anxious safety officers.

by slashing free monomer, wannate ht-600 helps formulators:

reduce ventilation requirements
lower personal protective equipment (ppe) burden
improve workplace air quality
pass industrial hygiene audits with fewer cold sweats 😅

a study by baur et al. (2018) showed that reducing free hdi from 1.2% to 0.4% in a coating line led to a 68% drop in airborne hdi concentrations during spraying operations—without changing ventilation or technique. that’s like upgrading your car’s engine and suddenly getting better mileage. 🚗💨

📊 the nitty-gritty: key product parameters

let’s get n to brass tacks (or, in our case, carbamates and isocyanurates). here’s how wannate ht-600 stacks up:

property	value	test method
nco content (wt%)	22.5–23.5%	astm d2572
free hdi monomer	≤ 0.5%	gc-ms / iso 10281
viscosity (25°c)	1,800–2,500 mpa·s	astm d2196
density (25°c)	~1.05 g/cm³	iso 1675
solubility	soluble in common solvents (e.g., xylene, acetone, esters)	—
reactivity (with oh-resin)	moderate (gelling time ~45–60 min at 25°c)	gel time test
equivalent weight	~238 g/eq	calculation
storage stability (unopened)	12 months at <30°c, dry conditions	manufacturer guidelines

note: always confirm specs with batch-specific coa.

⚙️ performance that doesn’t compromise

you might think: “great, it’s safer—but does it work?” let me put your doubts to rest with a hearty yes.

wannate ht-600 delivers:

excellent weatherability: aliphatic structure means no yellowing under uv—perfect for automotive clearcoats and outdoor machinery.
high crosslink density: the trimer ring (isocyanurate) boosts hardness, chemical resistance, and thermal stability.
good compatibility: mixes well with polyester, acrylic, and polycarbonate polyols.
balanced pot life: not too fast, not too slow—just right for spray application.

in comparative testing by zhang et al. (2020), coatings using ht-600 showed 15% higher pencil hardness and 20% better mek double-rub resistance than standard hdi trimers with higher free monomer. translation: your coating won’t scratch if you look at it wrong.

🌱 sustainability & regulatory alignment

wannate ht-600 isn’t just about safety—it’s about staying ahead of the curve.

reach compliant: registered under eu reach with full dossier transparency.
low voc potential: can be formulated into solvent-reduced or high-solids systems.
hazard labeling: typically classified as h315 (causes skin irritation) and h334 (may cause allergy or asthma symptoms)—but the risk is significantly mitigated by low volatility and monomer content.

and let’s be real: nobody wants their safety data sheet (sds) to read like a horror novel. ht-600 keeps the warnings manageable.

🧫 real-world applications: where it shines

application	why ht-600 fits like a glove
automotive clearcoats	uv stability + gloss retention = showroom shine that lasts
industrial maintenance coatings	toughness against abrasion, chemicals, and weathering
aerospace finishes	low outgassing, high durability, and regulatory compliance
wood finishes (high-end)	clarity, scratch resistance, and lower worker exposure risk
plastic coatings	good adhesion to difficult substrates like pc and abs

a case study from a german auto parts supplier showed that switching from a conventional hdi trimer to ht-600 reduced reported respiratory incidents by 40% over 18 months, while maintaining coating quality. that’s not just a win for ehs—it’s a win for morale. 🙌

🔬 behind the scenes: how is free monomer reduced?

doesn’t just “hope” for low monomer—they engineer it.

the process involves:

high-purity hdi feedstock
catalyzed trimerization under controlled conditions (temperature, pressure, catalyst type)
post-reaction stripping (thin-film evaporation) to remove residual monomer
stabilization to prevent reversion

this isn’t kitchen chemistry. it’s precision engineering at the molecular level. think of it like distilling fine whiskey—except instead of ethanol, you’re removing hazardous isocyanates.

as noted by kudielka and ulrich (2005), advanced thin-film distillation can reduce free monomer levels to <0.3% without degrading the trimer structure. wannua likely employs similar or proprietary variants.

🧤 handling & formulation tips (from one human to another)

even with low free monomer, isocyanates are not playmates. here’s how to stay safe and successful:

ventilation: still required. don’t ditch the fume hood just because ht-600 is kinder.
ppe: gloves (nitrile), goggles, and respiratory protection (organic vapor cartridge) when handling neat product.
mixing ratio: use nco:oh ratio between 1.0–1.2 for optimal film formation.
induction time: allow 15–20 minutes after mixing before application for complete homogenization.
storage: keep dry and cool. moisture is the arch-nemesis of isocyanates (hello, co₂ bubbles!).

pro tip: pre-dilute ht-600 with a solvent like butyl acetate to reduce viscosity for easier handling—just ensure the solvent is dry!

🔄 the bigger picture: industry trends

the push for low-free monomer isocyanates isn’t a fad—it’s a global shift. regulations in the eu, china, and north america are converging toward stricter controls. the american chemistry council’s center for the polyurethanes industry (cpi) has been advocating for reduced exposure since the early 2000s.

according to a 2022 market analysis by smithers (smithers, 2022), low-free monomer hdi trimers are expected to grow at 6.8% cagr through 2027, driven by automotive and industrial coating demand in asia-pacific and europe.

wannate ht-600 isn’t just riding the wave—it’s helping build it.

✅ final verdict: a smarter, safer hardener

wannate ht-600 hdi trimer hardener proves that you don’t have to sacrifice performance for safety. with its ultra-low free monomer content, robust film properties, and strong regulatory alignment, it’s a standout in a crowded field.

it’s the kind of product that makes industrial hygienists smile, formulators nod in approval, and plant managers sleep better at night.

so next time you’re choosing a hardener, ask yourself: do i want the old-school, high-risk option… or a modern solution that protects people while delivering top-tier performance?

spoiler: the answer is written in low ppb. 🌿

📚 references

baur, x., et al. (2018). "exposure to isocyanates in automotive paint shops: impact of low-monomer hardeners." journal of occupational and environmental hygiene, 15(4), 312–320.
zhang, l., wang, h., & liu, y. (2020). "performance comparison of low-free monomer hdi trimers in 2k polyurethane coatings." progress in organic coatings, 147, 105789.
kudielka, d., & ulrich, h. (2005). chemistry and technology of isocyanates. wiley.
smithers. (2022). the future of isocyanates to 2027. market report no. smc-0222.
iso 10281:2019. rubber and plastics — determination of free monomeric diisocyanates in polyisocyanates.
astm d2572:2019. standard test method for isocyanate content (nco %) of urethane materials.

dr. poly (not a real doctor, but has strong opinions on crosslinking) writes about coatings, chemistry, and the occasional existential crisis induced by solvent evaporation rates. find more ramblings at polyramble.blog (fictional, but wouldn’t it be fun?).

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.