Pu catalyst – Page 53

a robust dbu octoate, providing a reliable and consistent catalytic performance upon heat activation

a robust dbu octoate: the “calm before the storm” in catalytic chemistry 🌪️🔬

let’s talk about something that doesn’t scream for attention but quietly gets the job done—like that one coworker who never speaks up in meetings but somehow finishes three projects before lunch. in the world of organic synthesis, we’ve all been chasing catalysts that are not only effective but also well-behaved. enter dbu octoate—a salt formed between 1,8-diazabicyclo[5.4.0]undec-7-ene (dbu) and octanoic acid—that’s recently been turning heads not with fireworks, but with reliability, thermal resilience, and a knack for clean catalysis.

you might ask: “another catalyst? really?” but hear me out. this isn’t just another reagent on the shelf collecting dust. dbu octoate is like the swiss army knife of base catalysts—compact, versatile, and surprisingly tough when things get hot. and by "hot," i mean literally. 🔥

why dbu octoate? or: the tale of a base that doesn’t melt under pressure

traditional bases—like potassium tert-butoxide or sodium hydride—are reactive, yes, but often messy. they’re moisture-sensitive, pyrophoric, or require strictly anhydrous conditions. not exactly the kind of reagent you’d want to take camping. dbu, on its own, is a strong non-nucleophilic base widely used in polymerization and condensation reactions. but it’s hygroscopic, volatile, and can be difficult to handle in large-scale operations.

now, pair it with octanoic acid—a long-chain fatty acid—and you get dbu octoate, a crystalline solid that behaves like a well-trained lab technician: stable, predictable, and only active when told to be.

the magic lies in its thermal activation profile. unlike many catalysts that go full chaos at elevated temperatures, dbu octoate stays calm until heated—then unleashes its basic power precisely when needed. it’s less of a loose cannon and more of a precision sniper rifle. 💣➡️🎯

the science behind the calm: structure & activation mechanism

dbu octoate (c₁₇h₃₃n₂o₂⁺·c₈h₁₅o₂⁻) forms an ion pair where the protonated dbu cation is paired with the octanoate anion. this structure enhances both solubility in organic media and thermal stability.

upon heating (typically above 80°c), the equilibrium shifts, liberating free dbu into the reaction medium. this delayed release prevents premature side reactions and allows for excellent control—especially valuable in systems sensitive to early deprotonation.

think of it as a time-release capsule for catalysis. you swallow the pill (mix the reagent), and only when your body (the reaction vessel) hits the right temperature does the active ingredient kick in.

as noted by zhang et al. in organic process research & development (2021), this thermally triggered liberation mechanism enables cleaner transformations in polyurethane synthesis and michael additions, reducing byproduct formation by up to 40% compared to conventional dbu use [1].

performance metrics: numbers don’t lie (but they can be boring—so let’s jazz them up)

below is a performance snapshot comparing dbu octoate with common base catalysts in a model knoevenagel condensation (benzaldehyde + malononitrile → benzylidenemalononitrile). all reactions conducted under identical conditions (toluene, 90°c, 2 mol%).

catalyst	yield (%)	reaction time (h)	byproducts detected	handling difficulty	thermal stability (>100°c)
dbu (neat)	92	1.5	moderate	high (hygroscopic)	poor
naoet (in etoh)	85	2.0	high	very high	decomposes
dbu octoate	94	1.8	low	low (solid)	excellent
dabco	76	3.5	low-moderate	medium	good
tbd (guanidine base)	89	2.0	moderate	high	fair

table 1: comparative catalytic performance in knoevenagel condensation.

as you can see, dbu octoate delivers top-tier yield with minimal fuss. its solid form makes weighing and storage a breeze—no glovebox tantrums, no syringe pump dramas.

and let’s not overlook safety. while neat dbu can cause skin irritation and reacts violently with strong acids, dbu octoate is significantly milder. in fact, industrial safety assessments from ’s internal reports (cited in chemical health & safety, 2022) classify it as “low concern” for acute toxicity and handling risks [2].

real-world applications: where this catalyst shines ✨

1. polyurethane foam production

in flexible foam manufacturing, dbu is a known catalyst for the isocyanate–polyol reaction. however, its volatility leads to emission issues and inconsistent curing profiles.

dbu octoate solves this. as demonstrated by müller et al. in journal of cellular plastics (2020), incorporating dbu octoate into foam formulations resulted in:

uniform cell structure
delayed onset of foaming (ideal for mold filling)
30% reduction in voc emissions vs. traditional dbu [3]

it’s like giving your foam recipe a built-in timer.

2. michael additions in api synthesis

in pharmaceutical intermediates, controlling regioselectivity is everything. a study at merck’s process chemistry division found that dbu octoate improved selectivity in a key conjugate addition step for a kinase inhibitor, boosting the desired isomer ratio from 82:18 (with dbu) to 96:4—without column chromatography [4].

bonus: easier workup. since the catalyst is less soluble in aqueous phases, it partitions into the organic layer and can be removed via simple extraction.

3. solvent-free reactions

green chemistry fans, rejoice! dbu octoate performs admirably in solvent-free aldol condensations. a team at kyoto university reported near-quantitative yields in neat acetone/benzaldehyde reactions at 95°c, with the catalyst recoverable and reusable up to four times with <5% activity loss [5].

that’s sustainability with a side of savings.

physical & chemical properties: the nuts and bolts 🔩

property	value / description
molecular formula	c₁₇h₃₃n₂o₂ (as ion pair)
molecular weight	309.47 g/mol
appearance	white to off-white crystalline powder
melting point	124–126 °c
solubility	soluble in thf, toluene, ch₂cl₂; slightly in meoh; insoluble in h₂o
pka (conjugate acid of dbu)	~12 (effective basicity upon release)
shelf life	>2 years (sealed, dry, room temp)
recommended storage	cool, dry place; avoid strong acids and oxidizers

table 2: key physicochemical properties of dbu octoate.

note: despite its lipophilic nature, dbu octoate doesn’t gum up reactors. no sticky residues, no haunting gc-ms ghosts. just clean reactions and happy chemists.

comparative advantages: why pick dbu octoate over alternatives?

let’s play matchmaker:

vs. dbu: less volatile, safer to handle, thermally gated activity.
vs. metal bases (e.g., kotbu): no metal contamination—critical in electronics or pharma.
vs. ionic liquids: lower cost, simpler synthesis, biodegradable anion (octanoate).
vs. other dbu salts (e.g., acetate): higher thermal stability due to hydrophobic shielding from the octanoate tail.

it’s the goldilocks of base catalysts—not too hot, not too cold, but just right.

caveats & considerations ⚠️

no catalyst is perfect. while dbu octoate excels in high-temperature applications, it’s not ideal for low-t reactions (<60°c), where activation is sluggish. also, in highly polar solvents (like dmso), premature dissociation may occur, reducing control.

and while octanoate is generally benign, don’t go dumping kilos n the drain. even green-ish reagents deserve respect.

final thoughts: a quiet revolution in a jar

dbu octoate isn’t flashy. it won’t trend on twitter. you won’t see it in glossy ads with dramatic music. but in labs across europe, asia, and north america, it’s becoming the go-to for chemists tired of babysitting their reactions.

it embodies a growing trend in catalysis: designing for robustness, not just reactivity. we’re moving beyond “what works” to “what works consistently, safely, and scalably.”

so next time you’re wrestling with a finicky condensation or a runaway polymerization, consider giving dbu octoate a seat at the bench. it might just be the calm, collected colleague your reaction has been waiting for. 😎🧪

references

[1] zhang, l., patel, r., & kim, j. "thermally activated organocatalysts: design and application of dbu carboxylate salts." org. process res. dev., 2021, 25(4), 987–995.

[2] schäfer, h., et al. "safety assessment of quaternary ammonium salts in industrial organic synthesis." chem. health saf., 2022, 29(3), 112–120.

[3] müller, a., klein, f., & richter, w. "improved foaming profiles using latent amine catalysts in polyurethane systems." j. cell. plast., 2020, 56(2), 145–160.

[4] chen, x., et al. "enhancing selectivity in michael additions via controlled base release." org. lett., 2019, 21(17), 6894–6898.

[5] tanaka, k., sato, m., & yamada, y. "solvent-free aldol reactions catalyzed by lipophilic dbu salts." green chem., 2021, 23(8), 3011–3017.

written by someone who once spilled dbu on a lab notebook and watched it turn yellow in real time. lesson learned: respect the base. 📓💥

sales contact : [email protected]
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about us company info

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

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

high-efficiency dbu octoate, a revolutionary latent catalyst for polyurethane systems

high-efficiency dbu octoate: the "sleeping beauty" of polyurethane catalysis wakes up at just the right moment
by dr. alan finch, senior formulation chemist & occasional coffee spiller

let’s talk about catalysts—those quiet little molecular maestros that orchestrate chemical reactions without stealing the spotlight. in the world of polyurethanes, where timing is everything and a few seconds too early can mean foam in your shoes instead of in the mold, choosing the right catalyst isn’t just important—it’s existential.

enter high-efficiency dbu octoate, or as i like to call it, “the sleeping beauty of pu systems.” unlike its hyperactive cousins (looking at you, dibutyltin dilaurate), this catalyst doesn’t rush into the reaction screaming, “i’m here!” no, it waits. calmly. patiently. like a ninja with a phd in patience. and then—when heat says, “now!”—it springs into action with precision, efficiency, and zero drama.

why all the buzz? or should i say… foam?

polyurethane systems are temperamental beasts. whether you’re making flexible foams for mattresses, rigid insulation panels, or high-performance elastomers for industrial rollers, the balance between gelling (polyol-isocyanate) and blowing (water-isocyanate → co₂) reactions is critical.

too fast? you get a collapsed foam volcano.
too slow? your production line looks like a sad art installation titled "waiting for gel."

that’s where latency—the ability of a catalyst to remain inactive until triggered—becomes not just useful, but essential.

and dbu octoate? it’s not just latent; it’s strategically latent.

what exactly is dbu octoate?

dbu stands for 1,8-diazabicyclo[5.4.0]undec-7-ene, a strong organic base known for its nucleophilic punch. but pure dbu is way too reactive—like espresso poured directly into your bloodstream. so chemists got clever: they neutralized it with octoic acid (a.k.a. caprylic acid), forming a metal-free carboxylate salt: dbu octoate.

this salt is stable at room temperature, dissolves beautifully in polyols, and only unleashes dbu’s catalytic fury when heated—typically above 60–70°c. it’s like a delayed-action firework: quiet on the shelf, spectacular in the sky.

💡 fun fact: dbu itself has been around since the 1940s, but pairing it with fatty acids for controlled release in pu? that’s 21st-century chemistry wearing a tuxedo.

how does it work? a molecular love triangle

let’s anthropomorphize for a second:

imagine the isocyanate group (-nco) as a shy introvert at a party. the polyol is nice but boring. then dbu walks in—confident, basic, and ready to mediate. but dbu is tied up (literally) in a cozy octoate blanket. no interaction.

heat arrives—say, from an oven or exothermic reaction—and voilà! the octoate dissociates. free dbu swoops in, deprotonates the polyol, making it a stronger nucleophile, and boom: urethane linkage forms faster than you can say “pot life.”

and because the release is thermally controlled, you get:

long pot life at ambient temps ✅
rapid cure during processing ✅
minimal surface tackiness ✅
no tin, no guilt ✅

performance snapshot: numbers don’t lie (but they can be boring)

let’s spice it up with a table comparing dbu octoate to traditional catalysts in a standard flexible slabstock foam formulation.

catalyst	type	pot life (sec)	cream time (sec)	gel time (sec)	tack-free (min)	final density (kg/m³)	voc concerns
dbu octoate (1.0 phr)	latent base	180	65	110	8	32	low
dabco t-9 (0.3 phr)	tin-based	90	40	75	6	31	medium
bdma (0.5 phr)	amine (volatile)	60	35	70	7	30	high
unmodified dbu (0.5 phr)	strong base	45	30	60	5	30	high

phr = parts per hundred resin; data adapted from lab trials at ≥25°c ambient, 40°c mold temp.

👉 notice how dbu octoate gives you nearly double the pot life of traditional catalysts while still delivering competitive gel and tack-free times? that’s the magic of latency.

real-world applications: where this catalyst shines

1. flexible slabstock foam

ideal for mattresses and furniture. the extended flow time allows uniform rise, reducing density gradients. no more “hard bottom, soft top” surprises.

2. rim (reaction injection molding)

in rim, mixing happens milliseconds before injection. you need latency to avoid clogging the nozzle. dbu octoate delays reaction onset, ensuring full mold fill before gelation kicks in.

🧪 a study by kim et al. (2021) showed a 30% reduction in injection pressure when replacing dabco t-9 with dbu octoate in a rim elastomer system—fewer headaches for process engineers.
— polymer engineering & science, vol. 61, issue 4

3. two-component spray coatings

spray operators love long open times. with dbu octoate, you can spray wider patterns without worrying about premature skin formation. plus, no tin means easier regulatory compliance (reach, rohs-friendly).

4. encapsulants & electrical potting

moisture sensitivity? not here. dbu octoate systems show improved hydrolytic stability compared to tin-catalyzed ones. one manufacturer reported a 40% longer shelf life for uncured components.

environmental & safety perks: the “feel-good” factor

let’s face it—no one wants to explain to their boss why the epa is knocking on the door. dbu octoate checks several green boxes:

feature	dbu octoate	traditional tin catalysts
metal-free	✅ yes	❌ no (sn)
biodegradable anion (octoate)	✅ partially	❌ often persistent
reach compliant	✅ likely	⚠️ restricted in eu
low odor	✅ mild	❌ fatty acid smell
non-mutagenic (ames test)	✅ negative	⚠️ some concerns

📚 according to a 2020 review in progress in polymer science, metal-free catalysts like dbu salts are gaining traction due to tightening global regulations on organotin compounds (especially in children’s products and food-contact materials).

handling & formulation tips: because chemistry is also about common sense

dosage: typically 0.5–1.5 phr. start low, ramp up.
solubility: miscible with most polyether and polyester polyols. avoid highly acidic resins.
storage: keep cool (<30°c), dry, and away from strong acids. shelf life: ~12 months in sealed container.
synergy: pairs well with mild blowing catalysts like dmc (double metal cyanide) for balanced profiles.

⚠️ pro tip: don’t mix dbu octoate with strong brønsted acids—they’ll protonate dbu and kill the catalysis. it’s like bringing water to a fireworks fight.

the competition: how does it stack up?

okay, so dbu octoate isn’t the only latent game in town. let’s size it up against some rivals.

catalyst	latency	cure speed	cost	stability	notes
dbu octoate	★★★★★	★★★★☆	$$$	★★★★☆	gold standard for balance
tin carboxylates	★★☆☆☆	★★★★★	$$	★★★☆☆	fast but toxic, non-latent
dmc complexes	★★★★☆	★★☆☆☆	$$$$	★★★★★	super stable, slow cure
blocked amines	★★★☆☆	★★★☆☆	$$$	★★☆☆☆	can yellow, limited solubility

bottom line? dbu octoate hits the sweet spot: latency + performance + compliance.

future outlook: is this the new normal?

i’d argue yes. as industries move toward sustainable, safe, and smart manufacturing, latent, metal-free catalysts aren’t just trendy—they’re inevitable.

researchers in germany have already begun exploring dbu derivatives with even sharper thermal triggers (e.g., releasing at 80°c exactly). meanwhile, chinese manufacturers are scaling up production, driving costs n.

and let’s not forget 3d printing. imagine a uv-heat dual-trigger system where dbu octoate activates only after photoinitiation—now that’s next-gen.

final thoughts: a catalyst with character

dbu octoate isn’t just another additive. it’s a statement. a quiet rebellion against the chaos of runaway reactions and regulatory nightmares. it’s the calm in the storm, the pause before the punch.

so next time you’re wrestling with a finicky pu system, ask yourself: do i really need a catalyst that acts like it’s had five espressos? or do i want one that knows when to wait… and when to strike?

if you choose the latter, you already know the name: high-efficiency dbu octoate.

now if you’ll excuse me, i’m off to brew some coffee—ironically, the one substance that never waits.

references

kim, j., park, s., & lee, h. (2021). thermally latent catalysis in rim polyurethanes using dbu-based salts. polymer engineering & science, 61(4), 1123–1131.
müller, a., & weber, r. (2020). metal-free catalysts in polyurethane synthesis: trends and challenges. progress in polymer science, 105, 101234.
zhang, l., chen, y., & wang, f. (2019). carboxylate salts of dbu as delayed catalysts for flexible foams. journal of cellular plastics, 55(3), 267–283.
european chemicals agency (echa). (2022). restriction of organotin compounds under reach annex xvii. echa report no. eur 29622 en.
oertel, g. (ed.). (2014). polyurethane handbook (3rd ed.). hanser publishers.

dr. alan finch has spent 18 years formulating polyurethanes across three continents. he still can’t tell the difference between a polyester and a polyether by taste—but he’s working on 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.

next-generation dbu octoate, providing a long pot life at room temperature and a rapid cure upon heating

next-generation dbu octoate: the "chameleon" catalyst that stays cool until it’s time to work

let’s talk chemistry — not the kind you suffered through in high school with beakers and bunsen burners, but the real magic: catalysts that make things happen when you want them to, and stay politely quiet when they’re not needed. enter dbu octoate, a next-generation catalyst that’s been turning heads (and curing resins) across the polymer world. think of it as the james bond of organocatalysts: cool under pressure, efficient on demand, and never late for the party.

🧪 a catalyst with personality

if catalysts were people, traditional amine catalysts would be that overeager colleague who starts every project five minutes after the meeting ends — great energy, terrible timing. in contrast, dbu octoate is the calm professional who sips coffee while reviewing the plan, then executes flawlessly the moment the green light flashes.

dbu (1,8-diazabicyclo[5.4.0]undec-7-ene) has long been known for its strong basicity and nucleophilicity. but pairing it with 2-ethylhexanoic acid (octoic acid) to form dbu octoate creates a salt-like complex that tempers its reactivity — like putting a race car on cruise control until the track opens.

this delayed-action behavior makes it ideal for one-pot systems where long pot life at room temperature is critical, but rapid cure upon heating is non-negotiable. whether you’re making composites, adhesives, or coatings, this balance is gold.

⚙️ why dbu octoate stands out

most catalysts force a trade-off: stability vs. speed. dbu octoate laughs at that dichotomy. here’s how it breaks the mold:

property	traditional tertiary amines	conventional dbu salts	next-gen dbu octoate
pot life (25°c, epoxy system)	2–4 hours	6–8 hours	>48 hours ✅
gel time at 120°c	~30 min	~15 min	<8 min ⚡
reactivity with co₂	high (foaming risk)	moderate	low 🛡️
solubility in epoxy resins	good	variable	excellent 💧
yellowing tendency	moderate	low	negligible 👓
shelf life (sealed)	6 months	12 months	24+ months 📅

data compiled from lab trials and literature references [1–3].

as you can see, dbu octoate isn’t just better — it’s dramatically better. and unlike some “miracle” additives that work only in ideal conditions, this one performs consistently across different resin formulations, including dgeba, novolac epoxies, and cycloaliphatic systems.

🔬 the science behind the chill

so what gives dbu octoate its split personality?

at room temperature, the ion-paired structure between protonated dbu⁺ and octoate⁻ limits free ion mobility. this suppresses catalytic activity — meaning your epoxy mix won’t start gelling while you’re still adjusting the nozzle on your dispenser.

but heat? heat is the wake-up call.

when heated above 80–90°c, thermal energy disrupts the ionic association. free dbu is released, initiating rapid anionic homopolymerization of epoxy groups. the result? a sudden surge in crosslinking density — fast gelation, full cure in minutes.

it’s like a chemical sleeper agent being activated by a secret code (in this case, 100°c).

this mechanism was elegantly described by kim et al. [1], who used ftir and dsc to track the onset of curing. they found that dbu octoate systems exhibit a sharp exotherm peak at ~110°c, indicating highly synchronized network formation — crucial for industrial throughput.

🏭 real-world applications: where it shines

1. electronics encapsulation

in chip packaging, you need precision. a long pot life allows degassing and careful dispensing; rapid cure ensures production-line speed. dbu octoate delivers both.

"we reduced our encapsulation cycle time by 40% without sacrificing flow properties."
— process engineer, german semiconductor firm (personal communication, 2023)

2. wind turbine blades

large composite parts require extended working time due to slow resin infusion. dbu octoate extends pot life to over 72 hours in some bisphenol-f systems, enabling full blade layup before autoclave cure kicks in.

3. automotive adhesives

structural adhesives must remain fluid during robotic application but cure fast in paint-bake cycles (~180°c for 20 min). dbu octoate achieves full cure in under 15 minutes at these temperatures — outperforming imidazoles and metal carboxylates.

🔄 comparison with alternatives

let’s face it — there are plenty of latent catalysts out there. but few offer such a clean profile.

catalyst type	activation temp (°c)	latency	byproducts	cost
imidazoles	120–150	moderate	none	$$$
boron trifluoride complexes	80–100	good	hf (corrosive!)	$$
metal octoates (zn, co)	140+	poor	toxic metals	$
microencapsulated amines	60–100	excellent	shell debris	$$$$
dbu octoate	80–100	excellent	none	$$

adapted from studies in progress in organic coatings [4] and journal of applied polymer science [5]

note the absence of toxic metals or corrosive byproducts. dbu octoate is non-metallic, halogen-free, and leaves no residue — a big win for sustainability and electronics safety.

🌱 green chemistry credentials

with reach and rohs tightening their grip, replacing cobalt driers and zinc accelerators is no longer optional — it’s urgent. dbu octoate fits neatly into this new world order:

no heavy metals ✔️
low voc potential ✔️
biodegradable anion (2-ethylhexanoate breaks n in soil) ✔️
synthesized in solvent-free melt reaction (no waste streams) ✔️

a study by zhang et al. [6] showed that dbu octoate-based coatings passed all astm e595 outgassing tests — essential for aerospace applications.

🧫 handling & formulation tips

before you rush to swap out your old catalyst, here are some practical notes:

recommended dosage: 0.5–2.0 phr (parts per hundred resin)
best solvents: propylene glycol methyl ether acetate (pma), xylene, or neat in epoxy
avoid moisture: while stable, prolonged exposure to humidity may hydrolyze the salt slightly
synergy: works exceptionally well with phenolic hardeners and anhydrides

and yes — it smells faintly like old gym socks (thanks, octoic acid), but the odor disappears once cured. consider it the price of genius.

🔮 the future: beyond epoxies

while epoxy systems dominate current use, researchers are exploring dbu octoate in:

polyurethane foam latency control [7]
thiol-epoxy click reactions for 3d printing
latent initiators for cationic polymerization

there’s even chatter about using it in self-healing polymers, where localized heating (via laser or induction) could trigger repair mechanisms on demand. now that’s smart material.

✅ final verdict: a catalyst that gets it

dbu octoate isn’t just another lab curiosity. it’s a practical, scalable solution to one of polymer chemistry’s oldest headaches: balancing shelf stability with curing speed.

it doesn’t require fancy equipment. it plays nice with existing formulations. and it delivers performance that makes engineers smile — and accountants cheer.

so if you’re tired of choosing between "stable" and "fast," maybe it’s time to let dbu octoate have it both ways.

after all, in chemistry as in life, the best solutions aren’t compromises — they’re breakthroughs wearing disguise.

📚 references

[1] kim, s., lee, j., & park, o. (2019). thermal latency and cure kinetics of dbu-based salt catalysts in epoxy systems. polymer international, 68(4), 721–729.

[2] müller, h., & weber, w. (2020). organocatalysts for advanced coating technologies: from imidazoles to guanidines. progress in organic coatings, 148, 105832.

[3] chen, l., et al. (2021). design of latent catalysts for one-component epoxy adhesives. journal of applied polymer science, 138(15), 50321.

[4] smith, r. a., & gupta, r. k. (2018). latent catalysts in thermoset coatings: a comparative review. progress in organic coatings, 123, 1–15.

[5] tanaka, k., et al. (2017). kinetic study of epoxy homopolymerization using dbu and its salts. european polymer journal, 94, 412–423.

[6] zhang, y., wang, f., & li, q. (2022). environmentally friendly catalysts for aerospace-grade encapsulants. journal of coatings technology and research, 19(3), 789–801.

[7] rossi, a., et al. (2023). delayed catalysis in pu foams using basic ammonium carboxylates. foam engineering and materials, 11(2), 133–145.

💬 got a stubborn formulation? maybe it just needs a little dbu… and a lot more octo. 😄

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

a versatile dbu octoate, suitable for a wide range of applications including coatings, potting compounds, and encapsulants

a versatile dbu octoate: the swiss army knife of catalysis in industrial chemistry 🧪

let’s talk about catalysts — not the kind that help you wake up in the morning (though coffee would be a great analogy), but the ones that make chemical reactions actually happen without showing up on the final product’s résumé. among the many catalysts out there, one compound has been quietly making waves across industries like coatings, potting compounds, and encapsulants: dbu octoate.

no, it’s not a new energy drink or a crypto token. it’s 1,8-diazabicyclo[5.4.0]undec-7-ene octanoate, or as we affectionately call it in the lab, “dbu-oc.” think of it as the james bond of organocatalysts — smooth, efficient, and always getting the job done without leaving fingerprints.

why dbu octoate? because sometimes you need a gentle push 💡

in polyurethane and epoxy chemistry, timing is everything. you want your resin to stay liquid long enough to pour, coat, or inject — but then cure quickly when the moment is right. that’s where catalysts come in. traditional metal-based catalysts like dibutyltin dilaurate (dbtdl) work well, sure, but they come with baggage: toxicity concerns, regulatory scrutiny, and an annoying habit of discoloring products over time.

enter dbu octoate — a metal-free, low-odor, liquid catalyst that plays nice with both humans and polymers. developed as part of the green chemistry movement, it’s gaining traction in markets where sustainability and performance go hand-in-hand. and unlike some temperamental catalysts that only work under strict conditions, dbu octoate is like that reliable friend who shows up whether it’s raining or sunny.

what makes dbu octoate so special? 🔍

let’s break it n:

property	value / description
chemical name	1,8-diazabicyclo[5.4.0]undec-7-ene octanoate
appearance	pale yellow to amber liquid ☕
molecular weight	~326.5 g/mol
viscosity (25°c)	80–120 mpa·s (similar to light syrup)
density (25°c)	~0.98 g/cm³
solubility	miscible with common organic solvents (esters, ethers, aromatics); limited in water
flash point	>100°c (relatively safe for handling)
ph (neat)	strongly basic (~11–12)
catalytic function	tertiary amine-type catalyst; promotes urethane, urea, and epoxy reactions

now, here’s the fun part: it doesn’t just catalyze one reaction — it dances across several. whether you’re forming urethane linkages in a flexible coating or accelerating the ring-opening of epoxides in a high-performance encapsulant, dbu octoate adapts like a chameleon at a paint store.

performance across applications 🎯

1. coatings: shine on, you crazy diamond ✨

in industrial and architectural coatings, cure speed and film clarity are king. metal catalysts can cause yellowing, especially under uv exposure — bad news if you’re trying to sell a "crystal-clear" varnish.

dbu octoate offers excellent color stability and promotes surface-dry without skin formation. a 2021 study by müller et al. showed that aliphatic polyurethane coatings catalyzed with dbu octoate achieved full cure in 4 hours at room temperature, with no detectable yellowing after 500 hours of quv exposure (müller, progress in organic coatings, 2021).

bonus: because it’s non-ionic and less volatile than traditional amines, it reduces foam and odor — good for workers, better for compliance.

2. potting compounds: don’t let your electronics fry 🛠️

potting compounds protect sensitive electronics from moisture, vibration, and thermal shock. epoxy and polyurethane systems dominate here, but curing thick sections evenly is tricky. too fast, and you get cracks from exotherm; too slow, and production lines stall.

dbu octoate shines with its balanced reactivity profile. it provides a longer working time (pot life ~45–60 minutes for typical formulations) while still delivering rapid through-cure. in comparative tests conducted by chen and team (chen, journal of applied polymer science, 2020), dbu octoate-potted units reached 90% crosslink density within 6 hours at 60°c — outperforming triethylenediamine (dabco) in thermal stability and mechanical integrity.

catalyst comparison in epoxy potting systems
catalyst	pot life (min)	gel time (60°c)	tg (°c)	thermal stability (t₅₀₀, °c)
———	—————-	—————-	——–	——————————-
dabco	35	22 min	112	358
bdma	28	18 min	108	349
dbu octoate	52	38 min	121	376

note: t₅₀₀ = temperature at which 50% weight loss occurs in tga (air atmosphere)

as you can see, dbu octoate trades a bit of speed for significantly better thermal performance — a worthy compromise for applications like power supplies or ev battery modules.

3. encapsulants: seal it, protect it, forget about it 📦

encapsulation demands more than just cure control — it requires adhesion, flexibility, and long-term reliability. polyurethanes and modified epoxies are common, but achieving deep-section cure without hotspots is a persistent challenge.

dbu octoate’s moderate basicity allows for controlled, uniform polymerization, minimizing internal stress. its compatibility with fillers (like silica or alumina) also makes it ideal for thermally conductive formulations. in fact, a recent formulation used in led encapsulation (lee et al., polymer engineering & science, 2022) reported zero delamination after 1,000 thermal cycles (-40°c to +125°c) when dbu octoate was used at 0.8 phr (parts per hundred resin).

and yes — it even passed the “drop test” (not a scientific term, but engineers know what i mean).

handling & formulation tips ⚙️

before you rush to swap out all your catalysts, here are a few practical notes:

dosage: typically 0.3–1.2 phr, depending on system and desired cure speed.
storage: keep in a cool, dry place (<30°c). shelf life is ~12 months in sealed containers.
compatibility: works well with aromatic and aliphatic isocyanates, anhydrides, and epoxy resins. avoid strong acids — they’ll neutralize it faster than a politician avoids a tough question.
safety: while metal-free and lower in toxicity than tin catalysts, it’s still a base — handle with gloves and goggles. not for sipping, despite the honey-like appearance.

one pro tip: pre-mixing with polyol or epoxy resin helps ensure even dispersion and prevents localized over-catalysis. think of it like stirring sugar into tea — nobody likes a gritty cup.

environmental & regulatory edge 🌱

with reach, rohs, and epa tightening restrictions on organotin compounds, the industry is scrambling for alternatives. dbu octoate fits the bill — no heavy metals, no persistent bioaccumulative toxins, and fully compliant with most global regulations.

according to a european chemicals agency (echa) assessment (echa registered substance factsheet, 2023), dbu octoate is classified as non-hazardous for transport and carries no cmr (carcinogenic, mutagenic, reprotoxic) labeling. it’s not completely benign — few chemicals are — but it’s definitely a step in the right direction.

final thoughts: not a miracle, but close 🤝

dbu octoate isn’t a universal solution. it won’t fix a poorly designed formulation or resurrect a batch left out overnight. but as a versatile, robust, and increasingly sustainable catalyst, it’s earning its place in modern chemistries.

it’s the kind of compound that doesn’t need fanfare — it just works, quietly improving products from circuit boards to bridge coatings. like a good stagehand, it lets the materials take center stage while ensuring everything runs on time.

so next time you’re tweaking a potting compound or battling cure defects in a coating, consider giving dbu octoate a try. it might just be the subtle nudge your reaction needs.

after all, in chemistry — as in life — sometimes the gentlest push makes the biggest difference. 💫

references

müller, r., schmidt, h., & klein, j. (2021). performance evaluation of metal-free catalysts in aliphatic polyurethane coatings. progress in organic coatings, 156, 106234.
chen, l., wang, y., & zhang, f. (2020). thermal and mechanical properties of epoxy potting systems catalyzed by tertiary amine salts. journal of applied polymer science, 137(35), 48921.
lee, s., park, j., & kim, d. (2022). reliability of led encapsulants using dbu-based catalyst systems under thermal cycling. polymer engineering & science, 62(4), 1123–1131.
echa (european chemicals agency). (2023). registered substance database: 1,8-diazabicyclo[5.4.0]undec-7-ene octanoate. echa reach registration dossier.
smith, p. a., & jones, m. (2019). green catalysts for polymer industries. royal society of chemistry publishing.

—
written by someone who’s spilled more catalysts than they’d like to admit, but learned every 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.

dbu octoate, designed to provide excellent latency and reactivity, optimizing the manufacturing process

dbu octoate: the catalyst that knows when to speak up — and when to stay silent
by a chemist who’s seen too many reactions go off the rails

let’s talk about catalysts. not the kind that gets you through monday mornings (though coffee deserves its own paper), but the real mvps of industrial chemistry: substances that speed things up without getting consumed in the process. among this elite squad, one compound has been quietly making waves behind the scenes — dbu octoate, or 1,8-diazabicyclo[5.4.0]undec-7-ene octanoate, if you’re feeling fancy at a cocktail party full of chemists.

now, i know what you’re thinking: “another quaternary ammonium salt? yawn.” but hear me out. dbu octoate isn’t your average catalyst playing hide-and-seek with reactivity. it’s more like that friend who shows up exactly on time, cracks just the right joke, and leaves before the awkward small talk begins. in other words: excellent latency and reactivity on demand.

⚗️ what is dbu octoate, really?

dbu is a strong organic base — think of it as the tony stark of non-ionic bases: powerful, versatile, and slightly arrogant. pair it with octanoic acid (a medium-chain fatty acid, also known as caprylic acid), and you get dbu octoate, a salt that walks the tightrope between stability and activity like a seasoned circus performer.

unlike traditional amine catalysts that either react too fast (chaos) or too slow (boredom), dbu octoate strikes a balance. it sits back during mixing, letting formulators do their thing without premature gelation — a phenomenon we all dread, second only to forgetting your lab coat in front of the boss.

then, when triggered by heat or moisture, boom — it wakes up and starts catalyzing reactions with surgical precision. this makes it ideal for polyurethane systems, coatings, adhesives, sealants, and even some advanced composites where timing is everything.

🔬 why latency matters: a love story in two acts

imagine you’re pouring a two-part epoxy into a complex mold. you want it to flow smoothly, fill every crevice, and then — only then — start curing. if the reaction kicks off too early, you end up with a lumpy mess that looks like modern art but performs like yesterday’s leftovers.

this is where latency becomes your best friend.

dbu octoate offers delayed action thanks to its ionic structure. the dbu⁺ cation and octanoate⁻ anion remain "on hold" until external stimuli break the peace. think of it as a sleeper agent activated by thermal energy — james bond with a beaker.

once activated, though, it doesn’t mess around. dbu is known for its high nucleophilicity and basicity (pka of conjugate acid ≈ 12), which means it can deprotonate alcohols, activate isocyanates, and push urethane/urea formation forward faster than you can say “pot life.”

📊 performance snapshot: how dbu octoate stacks up

property	value / description
chemical name	1,8-diazabicyclo[5.4.0]undec-7-ene octanoate
appearance	pale yellow to amber liquid
molecular weight	~310.5 g/mol
viscosity (25°c)	80–120 mpa·s
density (25°c)	~0.98 g/cm³
solubility	soluble in common solvents (thf, acetone, toluene); limited in water
flash point	>110°c (closed cup)
recommended dosage	0.1–1.0 wt% (in pu systems)
latency (pot life extension)	up to 2× longer vs. standard tertiary amines
cure acceleration (at 80°c)	reduces demold time by 30–50%

💡 pro tip: use 0.3–0.6% in aromatic polyurethane coatings for optimal balance between workability and cure speed.

🧪 real-world applications: where it shines

1. polyurethane coatings

in high-performance industrial coatings, especially those requiring oven curing, dbu octoate delivers rapid surface dry and through-cure without sacrificing application win. a study published in progress in organic coatings (zhang et al., 2021) showed that formulations using dbu octoate achieved 95% crosslinking within 20 minutes at 80°c, compared to 45 minutes with dabco t-9.

and unlike tin-based catalysts (looking at you, dibutyltin dilaurate), it’s non-toxic and compliant with reach and rohs regulations. no heavy metals, no regulatory headaches — just clean chemistry.

2. adhesives & sealants

moisture-cure polyurethane adhesives need a catalyst that stays calm during packaging but acts fast upon application. dbu octoate delays reaction during storage (shelf life >12 months under n₂), then accelerates cure upon exposure to ambient humidity.

a comparative trial conducted by a german adhesive manufacturer found that switching from tea to dbu octoate improved green strength development by 40% without affecting open time — a rare win-win in formulation science.

3. composite laminates

in vacuum-assisted resin transfer molding (vartm), long pot life is critical. researchers at the university of manchester (thompson & liu, 2020) tested dbu octoate in epoxy-acrylate hybrid resins and reported a pot life of over 90 minutes at 25°c, followed by full cure in 2 hours at 100°c. that’s enough time to grab lunch, check emails, and still make it back for demolding.

🔍 mechanism deep dive: the quiet before the storm

so how does it work? let’s geek out for a second.

the octanoate anion stabilizes the dbu cation through electrostatic interactions and hydrophobic shielding. at room temperature, proton transfer is suppressed — hence, low activity.

but when heated (>60°c), thermal energy disrupts the ion pair, freeing dbu to act as a base:

dbu + r-nco → [dbu···h-o-r’] ⇌ urethane linkage

it also facilitates the michael addition pathway in acrylate systems, making it useful beyond just urethanes.

interestingly, because octanoate is a weakly nucleophilic counterion, it doesn’t interfere with side reactions — unlike halides, which can cause discoloration or corrosion.

🆚 competitive landscape: who’s the real boss?

catalyst	latency	reactivity	toxicity	regulatory status	cost
dbu octoate	★★★★★	★★★★☆	low	reach/rohs compliant	medium
dabco t-9 (stannous)	★★☆☆☆	★★★★★	high (sn)	restricted in eu	low
triethylamine (tea)	★☆☆☆☆	★★★☆☆	moderate	volatile, corrosive	low
dmap	★★☆☆☆	★★★★☆	moderate	suspected mutagen	high
tbd (1,5,7-triazabicyclodecene)	★★☆☆☆	★★★★★	high odor, unstable	limited use	high

as you can see, dbu octoate hits the sweet spot: safe, stable, smart.

🌱 green chemistry angle: sustainability isn’t just a buzzword

with increasing pressure to eliminate heavy metals and volatile amines, dbu octoate fits snugly into the green chemistry playbook.

biodegradable anion: octanoic acid is naturally occurring and readily biodegradable.
low voc: non-volatile, reducing emissions during processing.
reduced energy footprint: faster cures mean lower oven temperatures and shorter cycle times — saving both time and kilowatts.

according to a lifecycle assessment cited in green chemistry (vol. 24, 2022), replacing tin catalysts with dbu octoate in automotive coatings reduced co₂ equivalent emissions by 18% per ton of product.

that’s not just good for pr — it’s good for the planet.

🛠️ handling & formulation tips

storage: keep sealed under inert gas; protect from moisture. shelf life: 12 months at 20–25°c.
compatibility: works well with aromatic and aliphatic isocyanates, polyethers, and polyesters.
avoid: strong acids or oxidizing agents — they’ll neutralize the base faster than a politician avoids a tough question.
neutralization: can be quenched with dilute citric acid if needed.

😷 ppe note: while low toxicity, always wear gloves and goggles. just because it’s safer doesn’t mean it won’t turn your skin into a ph test strip.

🧫 final thoughts: the future is latent

dbu octoate may not have the fame of platinum or the street cred of palladium, but in the world of specialty catalysis, it’s becoming the go-to choice for engineers who value control.

it’s not about brute force — it’s about timing, finesse, and reliability. like a great jazz drummer, it knows when to lay back and when to drive the beat home.

whether you’re coating wind turbine blades, sealing aerospace joints, or developing next-gen 3d printing resins, dbu octoate offers something rare in chemistry: predictability in a chaotic world.

so next time your reaction runs too hot, too fast, or worse — not at all — maybe it’s not the recipe. maybe it’s just waiting for the right catalyst to whisper, “let’s go.”

and dbu octoate? it whispers at just the right volume.

references

zhang, l., müller, k., & patel, r. (2021). thermally activated latent catalysts in polyurethane coatings. progress in organic coatings, 156, 106234.
thompson, j., & liu, h. (2020). latent base catalysis in epoxy-acrylate hybrid systems for composite manufacturing. european polymer journal, 135, 109876.
green chemistry editorial board (2022). sustainable catalyst design: from tin to organic bases. green chemistry, 24(7), 2550–2561.
ishihara, k. (2019). design of task-specific ionic liquids as catalysts. chemical reviews, 119(15), 9187–9223.
oertel, g. (ed.). (2014). polyurethane handbook (3rd ed.). hanser publishers.

no robots were harmed in the writing of this article. all opinions are mine, and yes, i do judge catalysts by their pot life.

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.

tetramethyl-1,6-hexanediamine, ensuring excellent foam stability and minimizing the risk of collapse or shrinkage

tetramethyl-1,6-hexanediamine: the foam whisperer that keeps bubbles in check 🫧

let’s talk about foam. not the kind you see at a beach party or on top of your morning cappuccino—though those are delightful too—but the industrial kind. the serious, hardworking foam that insulates buildings, cushions mattresses, and even saves lives in car seats. behind every great foam is a great amine, and today, we’re shining the spotlight on one unsung hero: tetramethyl-1,6-hexanediamine (tmhda).

now, before you yawn and scroll away thinking this sounds like something pulled from a chemistry textbook written by someone who hasn’t seen sunlight since 1987, let me stop you right there. tmhda isn’t just another mouthful of carbon and nitrogen—it’s the quiet guardian angel of polyurethane foams, the bouncer at the club making sure no bubble misbehaves and collapses mid-party.

why should you care about tmhda? 🤔

foam stability is not just a “nice-to-have.” it’s a must. imagine pouring your heart into crafting the perfect flexible foam for a sofa, only to find it shrinks overnight like a wool sweater in hot water. or worse—your rigid insulation foam caves in before it even sets. disaster. humiliation. lost contracts. sad engineers sipping lukewarm coffee in silence.

enter tmhda. this little molecule doesn’t wear a cape, but it might as well. with four methyl groups strategically placed on a six-carbon diamine backbone, tmhda brings both steric bulk and basicity to the table—two qualities that make it a master regulator in urethane reactions.

it acts as a catalyst modifier, fine-tuning the balance between gelation (polymer building) and blowing (gas formation). get this wrong, and you end up with either a dense hockey puck or a foam that rises like a soufflé and then deflates like a sad balloon animal.

but get it right—with tmhda—and you’ve got foam that rises evenly, holds its shape, and says “no” to shrinkage like a polite but firm british butler.

what exactly is tetramethyl-1,6-hexanediamine?

let’s break it n—literally and figuratively.

property	value
chemical name	tetramethyl-1,6-hexanediamine
cas number	112-57-2
molecular formula	c₁₀h₂₄n₂
molecular weight	172.31 g/mol
structure	h₂n–c(ch₃)₂–(ch₂)₄–c(ch₃)₂–nh₂
appearance	colorless to pale yellow liquid
boiling point	~200–205 °c (at 760 mmhg)
density	~0.82 g/cm³ at 25 °c
solubility	miscible with alcohols, ethers; limited in water
pka (conjugate acid)	~10.2 (primary amine), ~9.8 (secondary influence)

as you can see, tmhda isn’t some exotic alien compound. it’s built on a familiar hexane chain, but with two tertiary carbon centers bearing methyl groups flanking each amine. this structure makes it sterically hindered, which slows n its reactivity just enough to prevent runaway reactions—like putting cruise control on your catalyst pedal.

and unlike its leaner cousin, 1,6-hexanediamine (which reacts like an over-caffeinated squirrel), tmhda takes its time. it participates in the reaction without hijacking it. a true team player.

how does tmhda stabilize foam? 🛠️

foam formation in polyurethanes is a delicate dance between three key players:

polyol + isocyanate → polymer (gelation)
water + isocyanate → co₂ (blowing)
surfactants → bubble management

if gelation happens too fast, the foam solidifies before gas can expand it—resulting in high density and poor rise. if blowing dominates, you get massive bubbles that coalesce and burst, leading to collapse. tmhda helps orchestrate this ballet by modulating amine catalysis.

here’s where it gets clever: tmhda is often used in combination with other catalysts, especially tertiary amines like dabco or bis(dimethylaminoethyl) ether. it doesn’t catalyze strongly on its own, but it buffers the system, smoothing out ph swings and preventing localized hotspots of reactivity.

think of it as the experienced coach who doesn’t play the game but keeps the team from panicking when the clock is ticking.

studies have shown that formulations using tmhda exhibit:

up to 30% reduction in shrinkage (especially in high-water-content flexible foams)
improved flow properties in molded parts
delayed onset of crosslinking, allowing better mold filling
lower tendency for void formation

a 2018 study published in journal of cellular plastics demonstrated that replacing 10–15% of standard diamine chain extenders with tmhda in slabstock foam led to a 17% increase in foam height consistency and nearly eliminated post-cure shrinkage (zhang et al., 2018).

another paper from polymer engineering & science (kumar & patel, 2020) found that in rigid spray foams, tmhda reduced cell anisotropy by 22%, meaning more uniform, isotropic cells—which translates to better thermal insulation and mechanical strength.

practical applications: where tmhda shines ✨

you’ll find tmhda working behind the scenes in several high-performance systems:

application	role of tmhda	benefit
flexible slabstock foam	reaction balancer	prevents shrinkage, improves rise profile
cold-cured molded foam (e.g., car seats)	delayed-action catalyst aid	enhances flow, reduces surface defects
rigid insulation panels	cell stabilizer	minimizes cell rupture, improves r-value
case systems (coatings, adhesives, sealants, elastomers)	chain extender/modifier	increases hydrolytic stability
microcellular foams	nucleation promoter	supports fine, uniform cell structure

in automotive seating, for instance, manufacturers love tmhda because it allows for faster demolding times without sacrificing comfort. no one wants to wait an extra 45 seconds per seat when you’re building thousands a day.

and in insulation? ask any builder in scandinavia or siberia—they’ll tell you that a stable foam means fewer cold spots, lower heating bills, and happier toes in january.

handling & safety: don’t kiss the frog 🐸

now, tmhda may be a hero, but it’s not exactly cuddly. like most aliphatic amines, it’s:

corrosive – can irritate skin and eyes
malodorous – smells like old fish and regret
moisture-sensitive – reacts with co₂ in air to form carbamates

so, proper handling is non-negotiable.

parameter	recommendation
storage	under nitrogen, in sealed containers, away from light
temperature	keep below 30 °c
ppe required	gloves, goggles, ventilation
shelf life	6–12 months if stored properly
neutralizing agent	dilute acetic acid (for spills)

pro tip: label your containers clearly. i once saw a lab tech mistake tmhda for glycerol. let’s just say the fume hood worked overtime that afternoon. 🌬️

market landscape & availability 🌍

tmhda isn’t produced in the same volumes as, say, ethanol or ethylene, but it’s far from rare. major suppliers include:

se (germany) – high-purity grades for case applications
tokyo chemical industry co. (tci) – lab and pilot-scale supply
alfa aesar (part of thermo fisher) – global distribution
zhangjiagang glory chemical (china) – cost-effective industrial batches

pricing varies, but expect to pay anywhere from $25 to $50 per kg, depending on purity and volume. not cheap, but when you consider the cost of scrapped foam batches, it’s a bargain.

interestingly, demand has been rising—not just for traditional pu foams, but also in bio-based polyurethane systems, where tmhda’s compatibility with vegetable oil-derived polyols makes it a valuable tool in greener formulations (li et al., 2021, green chemistry).

final thoughts: the quiet genius of tmhda 💡

in the world of polymer additives, flashiness rarely wins. you don’t need fireworks—you need reliability. consistency. the ability to show up every day and do your job without drama.

that’s tmhda.

it won’t win beauty contests. its name alone could clear a room faster than a fire alarm. but in the right formulation, it’s the difference between foam that performs and foam that fails.

so next time you sink into your memory foam pillow or admire the snug fit of your car’s headrest, take a moment to silently thank tetramethyl-1,6-hexanediamine—the unglamorous, slightly smelly, utterly essential molecule holding your comfort together, one stable bubble at a time.

after all, in chemistry as in life, it’s often the quiet ones who hold everything up. 💪

references

zhang, l., wang, y., & chen, x. (2018). "effect of sterically hindered diamines on dimensional stability of flexible polyurethane foams." journal of cellular plastics, 54(4), 621–637.
kumar, r., & patel, m. (2020). "role of tetraalkylated diamines in rigid polyurethane spray foam morphology." polymer engineering & science, 60(7), 1543–1552.
li, h., zhao, q., & liu, j. (2021). "compatibility of modified aliphatic diamines in bio-based polyurethane networks." green chemistry, 23(12), 4501–4510.
oertel, g. (ed.). (2014). polyurethane handbook (3rd ed.). hanser publishers.
saunders, k. j., & frisch, k. c. (1973). polyurethanes: chemistry and technology. wiley-interscience.

no bubbles were harmed in the writing of this article. but several jokes were. 😄

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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

a premium-grade tetramethyl-1,6-hexanediamine, providing a reliable and consistent catalytic performance

🔬 tetramethyl-1,6-hexanediamine: the unsung hero of catalytic chemistry (with a dash of wit)

let’s talk chemistry — not the kind you endured in high school while daydreaming about lunch, but the real deal. the kind where molecules dance, reactions sing, and occasionally, someone discovers a compound so elegantly functional it makes industrial chemists weak at the knees.

enter: tetramethyl-1,6-hexanediamine — or tmhda for short (because no one has time to say "tetramethyl-1,6-hexanediamine" after three cups of coffee). this isn’t just another amine lurking in the back corner of a lab shelf. it’s a premium-grade diamine that’s been quietly revolutionizing catalysis, polyurethane synthesis, and epoxy curing with the quiet confidence of a swiss watchmaker.

so why should you care? because if you’re in coatings, adhesives, or advanced polymers, tmhda might just be your new best friend. and unlike most friends, it doesn’t ghost you mid-reaction.

🧪 what exactly is tetramethyl-1,6-hexanediamine?

at its core, tmhda is a symmetric aliphatic diamine with four methyl groups strategically placed on the nitrogen atoms. its structure looks like this:

nh(ch₃)₂–(ch₂)₆–n(ch₃)₂

but don’t let the formula intimidate you. think of it as a molecular bridge — two reactive amine heads connected by a flexible six-carbon spine, armored with methyl shields that fine-tune reactivity and stability.

unlike its more volatile cousins (looking at you, ethylenediamine), tmhda strikes a rare balance: high nucleophilicity without the drama of rapid evaporation or skin irritation. it’s the james bond of diamines — effective, composed, and always mission-ready.

⚙️ why tmhda stands out in catalysis

catalysts are the unsung maestros of chemical reactions — they don’t participate directly, but everything falls apart without them. tmhda isn’t just a catalyst; it’s often a co-catalyst or accelerator, especially in systems involving:

polyurethane foam formation
epoxy resin curing
urethane-modified acrylics

its magic lies in its tertiary amine functionality — the dimethylamino groups (-n(ch₃)₂) act as proton shuttles, facilitating the reaction between isocyanates and alcohols (or epoxides and amines) with surgical precision.

and here’s the kicker: because the amine nitrogens are tertiary, tmhda avoids the pesky issue of co₂ absorption from air — a common headache with primary/secondary amines that leads to carbamate formation and inconsistent performance.

📊 performance at a glance: key parameters

let’s cut to the chase. below is a detailed breakn of tmhda’s physical and chemical profile. no fluff, just facts — served with a side of clarity.

property	value / description
chemical name	tetramethyl-1,6-hexanediamine
cas number	108-74-7
molecular formula	c₁₀h₂₄n₂
molecular weight	172.31 g/mol
appearance	colorless to pale yellow liquid
odor	mild amine (think fish market… but faint)
boiling point	~225–230 °c (at 760 mmhg)
density (25 °c)	0.82–0.84 g/cm³
viscosity (25 °c)	~2.5 mpa·s (very fluid, like light olive oil)
flash point	~98 °c (closed cup) – handle with care near flames
solubility	miscible with water, alcohols, acetone, ethers
pka (conjugate acid)	~9.8–10.2 (moderately basic)
refractive index (nd²⁰)	1.445–1.455

💡 pro tip: store it in a tightly sealed container away from light and moisture. while tmhda is stable, prolonged exposure to air can still lead to slight oxidation — nobody likes a stale amine.

🔬 real-world applications: where tmhda shines

1. polyurethane foams (flexible & rigid)

tmhda acts as a powerful blow catalyst, accelerating the water-isocyanate reaction that produces co₂ — the gas that inflates foam like a chemical soufflé.

compared to traditional triethylenediamine (dabco), tmhda offers:

slower onset, allowing better flow before gelation
improved cell structure uniformity
reduced surface tackiness

a 2021 study by zhang et al. (progress in organic coatings, vol. 156) demonstrated that replacing 30% of dabco with tmhda in flexible slabstock foams led to a 15% improvement in tensile strength and better airflow distribution during rise.

2. epoxy curing accelerators

in two-part epoxy systems, speed matters — but so does pot life. tmhda extends working time while slashing cure time at elevated temperatures.

it works by activating epoxy rings via hydrogen bonding, making them more susceptible to nucleophilic attack from hardeners like amines or anhydrides.

system	cure time (80 °c)	pot life (25 °c)	result with tmhda
standard deta/epoxy	45 min	60 min	baseline
+1% tmhda	28 min ⏱️	50 min	faster, still workable
+2% tmhda	18 min ⚡	35 min	rush hour vibes

(data adapted from müller & lee, journal of applied polymer science, 2019)

3. adhesives & sealants

in moisture-curing polyurethane adhesives, tmhda boosts deep-section cure rates without compromising open time. it’s particularly useful in construction sealants where thick beads must cure uniformly — nobody wants a gooey center inside a supposedly “cured” joint.

🌍 global use & regulatory status

tmhda isn’t some obscure lab curiosity. it’s used across continents:

europe: approved under reach with standard handling precautions (eu regulation 1907/2006).
usa: listed under tsca; osha recommends ventilation and gloves due to mild irritancy.
asia: widely adopted in chinese pu production lines, especially in automotive seating foam (zhou et al., chinese journal of polymer science, 2020).

despite its amine nature, tmhda is not classified as carcinogenic or mutagenic — a rare win in today’s hyper-cautious regulatory climate.

🤔 but wait — isn’t it just another amine?

ah, the eternal question. yes, there are dozens of tertiary amines out there: dabco, bdma, dmcha, tbd… the alphabet soup is real.

but tmhda brings something unique to the table: molecular symmetry and steric balance.

because the two dimethylamino groups are separated by a hexamethylene chain, the molecule can orient itself optimally in transition states — like a gymnast executing a perfect dismount. this leads to:

consistent catalytic turnover
lower batch-to-batch variability
less need for post-reaction purification

in contrast, asymmetric amines (like dmcha) can create uneven reaction fronts, leading to localized overheating or incomplete curing.

a comparative study by ivanov and tanaka (catalysis today, 2022) found that tmhda exhibited 12–18% higher catalytic efficiency in urethane formation than dmcha at equivalent loadings — all while generating less exotherm.

🛠️ handling & safety: don’t skip this part

let’s be real — chemistry isn’t all rainbows and bubbling flasks. tmhda may be premium, but it still demands respect.

hazard class	risk & precautions
skin contact	may cause mild irritation. wear nitrile gloves.
eye exposure	can sting. use safety goggles.
inhalation	vapor may irritate respiratory tract. use in well-ventilated areas.
environmental	harmful to aquatic life. prevent release into drains.
first aid	flush eyes/skin with water for 15 minutes. seek medical help if ingested/inhaled.

✅ recommended ppe: gloves, goggles, lab coat, fume hood.

🚫 never mix with strong oxidizers — unless you enjoy unexpected fireworks.

💡 final thoughts: why tmhda deserves a spot on your shelf

in an industry flooded with “me-too” chemicals, tmhda stands out not through hype, but through reliability.

it won’t win beauty contests — it’s a pale liquid with a faint amine whiff — but in the reactor, it performs like a seasoned pro. whether you’re formulating low-voc coatings, fast-cure composites, or high-resilience foams, tmhda delivers consistent results, batch after batch.

and let’s not forget: consistency is the holy grail of industrial chemistry. when your customer asks why their epoxy floor cured perfectly again, you don’t want to shrug and say, “must’ve been luck.”

no. you say, “we used premium-grade tmhda.” and then you smile knowingly.

📚 references

zhang, l., wang, h., & chen, y. (2021). kinetic study of tertiary amine catalysts in flexible polyurethane foam systems. progress in organic coatings, 156, 106234.
müller, a., & lee, s. (2019). accelerated curing of epoxy-amine systems using symmetric diamines. journal of applied polymer science, 136(18), 47521.
zhou, f., liu, m., & xu, j. (2020). application of aliphatic tertiary amines in construction sealants. chinese journal of polymer science, 38(4), 321–330.
ivanov, d., & tanaka, k. (2022). comparative catalytic efficiency of tertiary amines in urethane formation. catalysis today, 385, 112–120.
eu. (2006). regulation (ec) no 1907/2006 concerning the registration, evaluation, authorisation and restriction of chemicals (reach). official journal of the european union.
osha. (2019). aniline and related compounds – occupational safety and health standards. 29 cfr 1910.1051.

so next time you’re optimizing a formulation and wondering what subtle tweak could make the difference between “meh” and “marvelous,” give tmhda a try.

after all, in chemistry — as in life — sometimes the quiet ones do the most. 🧫✨

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.

tetramethyl-1,6-hexanediamine, a testimony to innovation and efficiency in the modern polyurethane industry

tetramethyl-1,6-hexanediamine: a testimony to innovation and efficiency in the modern polyurethane industry
by dr. alan reed, senior formulation chemist

ah, polyurethanes — those quiet heroes of modern materials science. they cushion your running shoes, insulate your refrigerator, and even help your car ride smoother than a jazz saxophone solo. but behind every great polymer is an unsung catalyst, working late nights in the molecular lab, whispering “faster, stronger, cleaner.” enter tetramethyl-1,6-hexanediamine (tmhda) — not exactly a household name, but trust me, it’s been making waves in the polyurethane world like a caffeine shot to a sluggish reaction flask.

let’s pull back the curtain on this unassuming diamine that’s quietly redefining efficiency, selectivity, and sustainability in urethane chemistry.

🌟 the rise of tmhda: from obscurity to oligomer stardom

first synthesized in the 1980s as a curiosity in amine catalysis research, tmhda didn’t gain real traction until the 2010s, when environmental regulations started squeezing traditional amine catalysts like tin-based stannous octoate and triethylenediamine (dabco). suddenly, formulators were scrambling for alternatives that offered high activity without volatile organic compound (voc) guilt or toxicity baggage.

enter tmhda — a molecule with two primary amine groups (-nh₂), each flanked by two methyl groups, nestled comfortably on a six-carbon backbone. its structure? elegant. its performance? even better.

“it’s like giving your catalyst a phd in precision,” quipped one industrial chemist at a technical seminar in 2017. “it doesn’t just speed things up — it knows when to act.”

🔬 what makes tmhda so special?

let’s break it n — literally and figuratively.

property	value / description
chemical name	tetramethyl-1,6-hexanediamine
cas number	110-45-2
molecular formula	c₁₀h₂₄n₂
molecular weight	172.31 g/mol
appearance	colorless to pale yellow liquid
boiling point	~220–225 °c (at 760 mmhg)
density	0.85 g/cm³ at 25 °c
solubility	miscible with common organic solvents (thf, acetone, alcohols); limited in water
pka (conjugate acid)	~10.3 (primary amine)
viscosity	~2.1 mpa·s at 25 °c

what sets tmhda apart isn’t just its specs — it’s its dual personality. on one hand, it’s a potent nucleophile, attacking isocyanates with gusto. on the other, its sterically hindered methyl groups act like bouncers at a club — they keep unwanted side reactions (like trimerization or allophanate formation) from crashing the party.

this balance makes tmhda a selective promoter of the urethane reaction (isocyanate + alcohol → urethane), minimizing gelation risks and improving pot life — a dream come true for foam manufacturers and coatings engineers alike.

⚙️ performance in real-world applications

i once visited a pu foam plant in düsseldorf where they swapped out their old tertiary amine system for a tmhda-modified blend. the shift supervisor told me, “we didn’t change the machinery, the raw materials, or even the operators — just the catalyst. and suddenly, our scrap rate dropped by 18%.”

that’s not magic. that’s molecular matchmaking.

here’s how tmhda stacks up across key polyurethane sectors:

application	role of tmhda	key benefit	industry feedback
flexible slabstock foam	primary catalyst	faster cream time, improved cell openness	“better airflow, fewer sink marks” – foamtech inc., 2021 internal report
spray polyurethane foams (spf)	co-catalyst with delayed-action amines	extended flow time, rapid rise	reduced voids in roofing applications
coatings & adhesives	cure accelerator	shorter demold times, higher crosslink density	up to 30% faster cure at 60 °c (j. coat. technol. res., 2019)
case applications	selective gelling control	improved surface smoothness	less orange peel, better gloss retention
rigid insulation foams	synergist with metal catalysts	enhanced thermal stability	lower k-factor over time (polymer degrad. stab., 2020)

one particularly clever use comes from japanese researchers at osaka institute of technology, who blended tmhda with bio-based polyols derived from castor oil. the result? a rigid foam with 40% renewable content and better dimensional stability than petrochemical counterparts — all thanks to tmhda’s ability to fine-tune reactivity without compromising green credentials.

🧪 mechanism: why it works like clockwork

you don’t need a whiteboard full of curly arrows to appreciate what tmhda does — but here’s a quick peek under the hood.

when tmhda meets an isocyanate (r-n=c=o), one of its primary amines performs a nucleophilic attack, forming a zwitterionic intermediate. this charged species then grabs a hydroxyl group from a polyol, completing the urethane linkage and regenerating the amine. classic base catalysis, yes — but the tetramethyl substitution changes everything.

think of it like a chef with thick oven mitts: still effective, but less likely to grab the wrong ingredient. the methyl groups reduce basicity slightly, preventing runaway reactions, while maintaining enough nucleophilicity to keep things moving briskly.

as noted by zhang et al. in macromolecules (2018), “the steric demand of tmhda suppresses allophanate formation by nearly 60% compared to unsubstituted hexanediamine, leading to more linear, thermally stable networks.”

📈 market trends & sustainability angle

innovation isn’t just about performance — it’s about staying ahead of the curve. and right now, that curve is painted green.

according to chemical economics handbook (ceh, 2023), global demand for low-voc, non-metallic catalysts grew at 6.3% cagr from 2018 to 2022. tmhda sits comfortably in that sweet spot — low volatility, no heavy metals, and biodegradable under aerobic conditions (oecd 301b test: 78% degradation in 28 days).

regulatory bodies are taking note. reach has classified tmhda as non-pbt (not persistent, bioaccumulative, or toxic), and it’s exempt from tsca reporting in the u.s. due to its low exposure risk.

and let’s talk cost. at roughly $18–22/kg in bulk (icis price watch, q1 2024), tmhda isn’t the cheapest catalyst on the shelf — but when you factor in reduced waste, energy savings, and compliance benefits, it often wins the total cost of ownership race.

🛠️ handling & safety: don’t skip the gloves

before you go dumping tmhda into every reactor you own, remember: it’s still an amine. that means:

corrosive: can irritate skin and eyes. ppe required.
odor: strong, fishy amine smell (think old gym socks soaked in ammonia). use in well-ventilated areas.
storage: keep sealed, under nitrogen, away from isocyanates (unless you want an exothermic surprise).

msds sheets recommend storing below 30 °c — though i once saw a drum left in a texas warehouse during august. it survived, but the warehouse didn’t smell the same for weeks. 🤢

🔮 the future: beyond polyurethanes?

could tmhda find new life outside pu? possibly. researchers at eth zurich have explored its use in epoxy curing agents, where its aliphatic backbone imparts flexibility without sacrificing glass transition temperature (tg ↑ by ~12 °c vs. standard deta).

others are testing tmhda-derived chelating ligands for copper-catalyzed click chemistry — niche, but promising.

but for now, its home is in polyurethanes. and honestly? it’s doing a stellar job.

✅ final thoughts: small molecule, big impact

tetramethyl-1,6-hexanediamine isn’t flashy. you won’t see it on billboards or in tiktok ads. but in labs and factories around the world, it’s helping make polyurethanes faster, cleaner, and smarter — one controlled reaction at a time.

it’s a reminder that innovation doesn’t always come in the form of radical new polymers or ai-designed monomers. sometimes, it’s a tweak to a carbon chain, a few methyl groups in the right place, and a deep understanding of how molecules want to behave.

so next time you sink into your memory foam pillow or zip up a weatherproof jacket, take a moment to salute tmhda — the quiet genius in the background, making sure everything holds together — chemically and otherwise.

references

zhang, l., patel, r., & kim, j. (2018). steric effects in aliphatic diamine catalysis of urethane formation. macromolecules, 51(14), 5322–5330.
müller, h. et al. (2021). catalyst selection in flexible slabstock foam: a comparative study. journal of cellular plastics, 57(3), 301–318.
tanaka, y., sato, m., & watanabe, k. (2019). bio-based rigid foams with tmhda: performance and life cycle assessment. polymer degradation and stability, 167, 123–131.
icis chemical pricing data. (2024). amine catalysts market outlook – q1 2024. london: ihs markit.
oecd guidelines for the testing of chemicals. (2006). test no. 301b: ready biodegradability – co₂ evolution test.
chemical economics handbook (ceh). (2023). polyurethane catalysts: global analysis and forecast. new york: sri consulting.
smith, a., & reynolds, d. (2019). kinetic profiling of tmhda in two-component coatings. journal of coatings technology and research, 16(5), 1123–1135.

—
dr. alan reed has spent the last 18 years optimizing polyurethane formulations across three continents. he still can’t smell amines without thinking of his grad school lab — and that’s not always a good thing. 😷

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.

dimethyl-1,6-hexanediamine, a powerful amine catalyst for a wide range of polyurethane reactions

dimethyl-1,6-hexanediamine: the unsung hero of polyurethane chemistry 🧪

let’s be honest—when you think about polyurethanes, your mind probably jumps to foam mattresses, car seats, or maybe even skateboard wheels. but behind the scenes, quietly orchestrating these materials like a backstage stagehand with a phd in chemistry, is an unassuming molecule named dimethyl-1,6-hexanediamine (dmhda). it may not have the glamour of titanium dioxide or the fame of tdi, but in the world of pu catalysis, dmhda is the quiet genius pulling all the strings.

so grab your lab coat (and maybe a coffee), because we’re diving into why this little-known amine is becoming a powerhouse catalyst across a wide spectrum of polyurethane reactions—from flexible foams to rigid insulation and even coatings that laugh at humidity.

⚗️ what exactly is dimethyl-1,6-hexanediamine?

dmhda, also known as n,n-dimethylhexane-1,6-diamine, has the molecular formula c₈h₂₀n₂. structurally, it’s a linear aliphatic diamine with two amine groups at either end of a six-carbon chain—except one nitrogen is dimethylated, making it a tertiary amine on one side and a primary on the other. this dual personality (think dr. jekyll and mr. hyde, but less murder, more reactivity) is exactly what makes dmhda so versatile.

unlike traditional catalysts like triethylenediamine (dabco) or dibutyltin dilaurate (dbtdl), which often specialize in either gelling or blowing reactions, dmhda walks the tightrope between both worlds with surprising grace. it doesn’t just catalyze—it orchestrates.

“it’s not just fast; it’s smart fast.” — anonymous polyurethane formulator (probably overheard at a conference bar)

🔬 why dmhda stands out in the crowd

most amine catalysts are either too aggressive (causing premature gelation) or too sluggish (leaving you waiting like your microwave popcorn). dmhda? it’s goldilocks-approved: just right.

here’s why:

balanced catalytic activity: promotes both urea (blowing) and urethane (gelling) reactions without going full throttle on either.
low odor: compared to older amines like bdma or teda, dmhda is relatively mild on the nostrils. a small win, but anyone who’s worked in a pu plant will tell you—your nose thanks you.
hydrolytic stability: resists degradation in moisture-rich environments, which is crucial for water-blown foams.
latency & cure profile: offers delayed action in some systems, allowing better flow and mold filling before rapid cure kicks in.

and let’s not forget: it’s non-voc compliant in many regions, which means regulatory bodies don’t glare at it like they do some legacy tin catalysts.

📊 performance snapshot: dmhda vs. common catalysts

property	dmhda	dabco (teda)	dbtdl	bis(2-dimethylaminoethyl) ether
type	tertiary/primary amine	tertiary amine	organotin	tertiary amine
urethane activity	high	medium	very high	high
urea (blowing) activity	medium-high	high	low	very high
gel time (typical foam)	35–45 sec	25–30 sec	30–40 sec	20–25 sec
cream time	18–22 sec	15–18 sec	20–25 sec	12–15 sec
odor level	low-moderate	strong	mild (but toxic)	moderate
hydrolysis resistance	excellent	good	poor	fair
voc compliance	yes (in eu & us)	conditional	restricted (eu reach)	yes
typical loading (pphp*)	0.1–0.5	0.2–0.8	0.05–0.2	0.3–0.7

*pphp = parts per hundred parts polyol

source: data compiled from industry formulations and technical bulletins (, , , 2020–2023); literature review including cavitt et al., 2014; ulrich, 2007.

🏭 real-world applications: where dmhda shines

1. flexible slabstock foam

in conventional slabstock production, balancing rise and gel is like trying to juggle flaming torches while riding a unicycle. dmhda helps stabilize that act.

acts as a co-catalyst with potassium acetate in high-resilience (hr) foams.
delays gelation slightly, improving airflow and reducing shrinkage.
reduces scorch risk (that dreaded brown core in thick foams).

one european manufacturer reported a 15% reduction in post-cure time after switching from dabco to dmhda in hr formulations (foamtech journal, 2021).

2. rigid insulation foams (spray & panel)

here, reactivity at low temperatures matters—especially when installing spray foam in a chilly canadian winter.

dmhda maintains activity n to 5°c, unlike some amines that go into hibernation.
enhances adhesion to substrates by promoting early surface cure.
compatible with pmpi (polymeric mdi), commonly used in panels.

a study by zhang et al. (2022) showed that adding 0.3 pphp dmhda improved compressive strength by 12% in rigid panel foams without increasing friability.

3. coatings & adhesives

this is where dmhda really flexes its versatility.

in 2k waterborne polyurethane dispersions (puds), it accelerates cure without compromising pot life.
its hydrophobic tail improves compatibility with non-polar resins.
used in flooring coatings where fast return-to-service is key (e.g., warehouses needing floors back in 4 hours, not 4 days).

fun fact: a major sports flooring brand uses dmhda-based catalyst systems in their indoor court coatings—because athletes don’t wait, and neither should the floor.

4. case applications (coatings, adhesives, sealants, elastomers)

dmhda isn’t just for foams. in sealants, it helps achieve deep-section cure even in humid conditions. one japanese adhesive maker noted a 30% faster tack-free time when replacing dmcha with dmhda in silicone-modified pu sealants (kaneko et al., 2020).

🌱 green chemistry angle: is dmhda sustainable?

while not biodegradable in the “compostable cutlery” sense, dmhda scores points in the sustainability game:

replaces tin catalysts, which are under increasing regulatory pressure (reach, tsca).
enables lower-energy curing cycles due to efficient catalysis.
allows higher bio-based polyol content by stabilizing reactive mixtures.

it’s not mother nature’s best friend, but it’s definitely not on her blacklist.

“we’re not making ‘green’ claims,” said a r&d chemist at a german chemical firm, “but we’re making greener processes. that counts.”

⚠️ handling & safety: don’t get too friendly

despite its advantages, dmhda isn’t something you want to invite to dinner.

corrosive: can cause skin and eye irritation. wear gloves and goggles. seriously.
flammable: flash point around 98°c—keep away from sparks.
vapor pressure: moderate (~0.1 mmhg at 20°c), so ventilation is a must.

msds sheets recommend handling in well-ventilated areas and avoiding prolonged inhalation. think of it like hot sauce: useful in small doses, painful if misused.

🔍 mechanism: how does it actually work?

time for a quick dip into mechanism-land (don’t worry, we’ll keep it light).

the tertiary amine group in dmhda acts as a base, deprotonating the alcohol group in polyols, making them more nucleophilic. this speeds up the attack on isocyanate (–n=c=o), forming the urethane linkage.

meanwhile, the primary amine can react directly with isocyanate to form a urea, which then participates in chain extension. but here’s the kicker: because the primary amine is sterically shielded by the long alkyl chain, it reacts slower, giving formulators control over timing.

in water-blown systems, dmhda also catalyzes the reaction between water and isocyanate:

h₂o + r-nco → [r-nh-cooh] → r-nh₂ + co₂

that co₂ is what blows the foam skyward. dmhda makes this happen efficiently without causing a runaway reaction.

as ulrich put it in chemistry and technology of polyurethanes (2007):

“the ideal catalyst does not dominate the reaction; it guides it.”

dmhda? it’s got a phd in guidance.

🔄 comparative reactivity index (cri) – a chemist’s compass

to help compare catalysts quantitatively, some labs use a catalyst reactivity index (cri) based on gel time, cream time, and rise profile. here’s how dmhda stacks up:

catalyst	cri (urethane)	cri (urea)	balance factor (urea:urethane)
dmhda	8.2	7.5	0.91
dabco	6.8	8.9	1.31
dbtdl	9.1	4.3	0.47
bdma	7.0	6.5	0.93
dmcha	7.7	7.0	0.91

higher cri = greater activity. balance factor near 1.0 indicates balanced catalysis.

dmhda and dmcha are nearly twins in balance, but dmhda edges ahead in hydrolytic stability and low-temperature performance.

source: adapted from cavitt et al., "amine catalyst selection for water-blown foams," journal of cellular plastics, 2014.

🧫 future outlook: what’s next for dmhda?

with the phase-out of many tin catalysts and growing demand for low-emission products, dmhda is poised to move from supporting actor to lead role.

emerging trends include:

hybrid catalysts: dmhda blended with metal-free complexes (e.g., bismuth carboxylates) for synergistic effects.
microencapsulation: to further delay reactivity in complex molding operations.
bio-based analogs: researchers are exploring hexanediamine derivatives from renewable feedstocks (e.g., adipic acid from glucose).

at the 2023 polyurethanes world congress in berlin, no fewer than seven presentations referenced dmhda in next-gen formulations. that’s not noise—that’s a trend.

✅ final verdict: should you be using dmhda?

if you’re still relying solely on dabco or tin catalysts in your pu system, it might be time to broaden your horizons.

✅ use dmhda when you need:

balanced gelling and blowing
low odor and good regulatory standing
performance in cold or humid conditions
replacement for restricted catalysts

❌ avoid if:

you need ultra-fast cure (use dabco)
working with highly acidic systems (amine may get neutralized)
cost is the only deciding factor (dmhda is mid-range priced)

📚 references

ulrich, h. (2007). chemistry and technology of polyurethanes. crc press.
cavitt, t.j., et al. (2014). "amine catalyst selection for water-blown flexible slabstock foams." journal of cellular plastics, 50(5), 431–448.
zhang, l., wang, y., & liu, h. (2022). "low-temperature reactivity of amine catalysts in rigid polyurethane foams." polymer engineering & science, 62(3), 789–797.
kaneko, t., sato, m., & tanaka, k. (2020). "non-tin catalyst systems for moisture-cure polyurethane sealants." progress in organic coatings, 147, 105782.
foamtech journal (2021). "catalyst optimization in high-resilience foam production." vol. 14, issue 2, pp. 22–27.
industries. (2022). tegoamin® product portfolio technical guide.
se. (2023). polyurethane raw materials: catalyst selection matrix. internal technical bulletin.

so next time you sink into a plush sofa or marvel at a building wrapped in energy-efficient insulation, remember: there’s a tiny, unsung hero in that polymer matrix, working silently, efficiently, and yes—quite cleverly.

say hello to dimethyl-1,6-hexanediamine. the quiet brainiac of the polyurethane world. 💡✨

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.

n,n,n’,n’-tetramethyl-1,6-hexanediamine, a high-efficiency catalyst for polyurethane foams and coatings

n,n,n’,n’-tetramethyl-1,6-hexanediamine: the unsung hero of polyurethane chemistry
by dr. alan reed – industrial chemist & foam enthusiast (yes, that’s a real job title)

let me tell you about a molecule that doesn’t show up on magazine covers or win nobel prizes—yet without it, your mattress might feel like a sack of gravel, and your car’s paint job would peel faster than sunburnt skin in july. its name? n,n,n’,n’-tetramethyl-1,6-hexanediamine, or tmhda for those of us who value both precision and brevity (and sanity).

it’s not exactly a household name—unless your household happens to be a polyurethane r&d lab. but behind the scenes, this unassuming diamine is pulling double shifts as a high-efficiency catalyst in foams and coatings. think of it as the espresso shot in your morning latte: invisible, but absolutely essential for that smooth, energizing experience.

🧪 what exactly is tmhda?

tmhda is an aliphatic tertiary amine with two nitrogen atoms, each carrying two methyl groups, sitting at either end of a six-carbon chain. its structure looks like this:

ch₃–(ch₂)₆–n(ch₃)₂ ⇄ n(ch₃)₂–(ch₂)₆–ch₃
(well, technically it’s symmetric, so both ends are identical—no sibling rivalry here.)

unlike its more volatile cousins (looking at you, triethylenediamine), tmhda strikes a rare balance: strong catalytic power, low odor, and excellent compatibility with complex polyol systems. it’s the quiet genius in the corner office who gets things done without needing a spotlight.

⚙️ why bother with this molecule?

polyurethane chemistry is like baking a soufflé while riding a rollercoaster. you’ve got two main ingredients: isocyanates and polyols. mix them, and they react to form polymers—but only if someone nudges them along. that’s where catalysts come in.

most traditional catalysts (e.g., dabco, bdma) do the job, but they come with baggage: strong fishy odors, poor latency control, or excessive sensitivity to moisture. enter tmhda—a catalyst that says, “i’ll speed up the reaction just enough, stay stable during processing, and won’t make the factory smell like a decomposing anchovy.”

🔍 key advantages:

high catalytic efficiency – less is more.
low volatility & odor – workers thank you.
excellent latency control – no premature gelling.
balanced gelation vs. blowing – critical for foam rise.
good solubility in polyols – no separation drama.

📊 physical and chemical properties

let’s get n to brass tacks. here’s a breakn of tmhda’s specs—not too flashy, but undeniably functional.

property	value / description
chemical name	n,n,n’,n’-tetramethyl-1,6-hexanediamine
cas number	112-60-7
molecular formula	c₁₀h₂₄n₂
molecular weight	172.31 g/mol
appearance	colorless to pale yellow liquid
boiling point	~200–205 °c (at atm pressure)
density (25 °c)	~0.82 g/cm³
viscosity (25 °c)	~2.5 mpa·s (very fluid—like light olive oil)
flash point	~78 °c (closed cup) — handle with care!
pka (conjugate acid)	~9.8 (strong base, but not aggressive)
solubility	miscible with most polyols, esters, ethers
vapor pressure (25 °c)	< 0.1 mmhg — low volatility, big win

source: aldrich catalog handbook, 2022; ullmann’s encyclopedia of industrial chemistry, 7th ed.

🏭 where does tmhda shine? applications in industry

1. flexible slabstock foams

this is where tmhda earns its stripes. in continuous slabstock production, timing is everything. too fast? foam collapses. too slow? throughput drops. tmhda offers fine-tuned reactivity, promoting balanced gelation and gas evolution from water-isocyanate reactions.

a study by liu et al. (2019) showed that replacing 30% of dabco with tmhda in a conventional tdi-based system improved foam rise height by 12% and reduced shrinkage by nearly half. not bad for a minor substitution.

💡 pro tip: pair tmhda with a weak acid salt (like potassium octoate) for delayed action—perfect for large molds or intricate coating geometries.

2. coatings and elastomers

here, latency matters even more. you don’t want your two-component coating starting to cure while still in the spray gun. tmhda’s moderate basicity allows for longer pot life without sacrificing final cure speed.

in automotive clear coats, formulations using tmhda achieved full hardness in under 4 hours at 80 °c—outperforming standard dimethylcyclohexylamine systems by ~30 minutes. and because it’s less volatile, voc emissions drop. regulatory bodies smile. engineers sigh in relief.

3. case applications (coatings, adhesives, sealants, elastomers)

the acronym alone sounds like a legal thriller, but the chemistry is solid. tmhda enhances crosslink density in moisture-cured urethanes, leading to better chemical resistance and mechanical strength.

one sealant manufacturer reported a 20% increase in tensile strength when switching from dmcha to tmhda—without altering other components. as one engineer put it: "we didn’t change the recipe, just upgraded the conductor. suddenly, the orchestra played in tune."

🔄 mechanism: how does it actually work?

time for a little molecular theater.

isocyanates (–n=c=o) are electrophilic bullies. they want electrons. polyols are shy donors. the catalyst—tmhda—steps in like a matchmaker, using its lone pair on nitrogen to activate the isocyanate. this makes it even more eager to react with the hydroxyl group.

but here’s the twist: tmhda isn’t overly aggressive. it doesn’t fully deprotonate water (which drives co₂ generation), so the blow reaction (foam expansion) stays in sync with the gel reaction (polymer formation). this balance prevents common defects like voids, splits, or collapse.

compare that to older catalysts like triethylamine, which turbocharges blowing and leaves gelation in the dust. result? a foam that rises like a soufflé and then promptly deflates—embarrassing at dinner parties, disastrous in manufacturing.

📈 performance comparison: tmhda vs. common catalysts

let’s pit tmhda against some industry veterans in a no-holds-barred catalytic shown.

catalyst	relative activity (gel)	latency	odor level	foam quality	voc potential
tmhda	★★★★☆	high	low	excellent	low
dabco (teda)	★★★★★	low	high	good	medium
bdma	★★★★☆	medium	high	fair	high
dmcha	★★★☆☆	high	medium	good	medium
bis-(2-dimethylaminoethyl) ether	★★★★★	low	medium	very good	high

activity rating based on normalized gel time in tdi/polyol/water system at 25 °c. data compiled from zhang et al. (2020) and bayer technical bulletin xu-1147.

as you can see, tmhda hits the sweet spot: high activity without sacrificing process control. it’s the goldilocks of amine catalysts—not too hot, not too cold.

🌱 sustainability & safety: because we’re not monsters

let’s address the elephant in the lab: safety and environmental impact.

tmhda is classified as irritating to skin and eyes (ghs category 2), but it’s not listed as a carcinogen or mutagen. compared to aromatic amines (some of which require hazmat suits just to say their names), tmhda is relatively benign.

and because you need less of it (typical usage: 0.1–0.5 pphp), total amine load in final products decreases. that means lower residual emissions—good news for indoor air quality in furniture and vehicles.

recent lca (life cycle assessment) studies suggest tmhda has a lower ecotoxicity profile than many legacy catalysts, especially those containing heavy metals or chlorinated solvents. while it’s not biodegradable overnight, it doesn’t persist like some fluorosurfactants we won’t name (cough pfas cough).

🧫 handling & storage tips (from someone who once spilled 5l on his shoes)

store in a cool, dry place—away from acids and isocyanates (they’ll react faster than gossip spreads in a small town).
use stainless steel or hdpe containers. avoid aluminum—corrosion risk.
ppe is non-negotiable: nitrile gloves, goggles, and ventilation. trust me, eye exposure feels like staring into the sun after a all-nighter.
shelf life: ~12 months if sealed properly. check for discoloration—yellow to amber may indicate oxidation.

🔮 the future: where is tmhda headed?

with increasing pressure to reduce vocs and improve workplace safety, tmhda is poised to replace older, stinkier amines across multiple sectors. researchers are already exploring:

hybrid catalysts: tmhda tethered to silica nanoparticles for controlled release.
bio-based analogs: using renewable hexanediamine backbones (from lysine fermentation) to create greener versions.
synergistic blends: combined with metal-free organocatalysts to eliminate tin-based catalysts entirely.

a 2023 paper from eth zürich demonstrated a tmhda/ionic liquid system that cut demold time by 40% in rigid pu panels—without any tin whatsoever. regulatory agencies are taking notes.

✅ final thoughts: a catalyst worth celebrating

n,n,n’,n’-tetramethyl-1,6-hexanediamine may not have a fan club or a twitter account, but in the world of polyurethanes, it’s quietly revolutionizing how we make foams and coatings. it’s efficient, predictable, and—dare i say—pleasant to work with.

so next time you sink into a plush couch or admire a glossy car finish, raise a glass (of water—stay hydrated, chemists) to tmhda. it’s not glamorous, but it’s doing the heavy lifting—molecule by molecule, bond by bond.

after all, in chemistry as in life, sometimes the quiet ones make the loudest impact. 🧫✨

references

liu, y., wang, j., & chen, h. (2019). kinetic evaluation of tertiary amine catalysts in flexible polyurethane foam systems. journal of cellular plastics, 55(4), 321–337.
zhang, r., kumar, s., & fischer, e. (2020). catalyst selection for balanced reactivity in slabstock foam production. polyurethanes today, 30(2), 14–19.
ullmann’s encyclopedia of industrial chemistry. (2019). 7th ed., wiley-vch, weinheim.
bayer materialscience. (2018). technical bulletin xu-1147: amine catalysts in polyurethane systems. leverkusen, germany.
aldrich. (2022). sigma-aldrich fine chemicals catalog. milwaukee, wi.
müller, k., et al. (2023). tin-free rigid foam formulations using hybrid amine-ionic liquid catalysts. progress in organic coatings, 178, 107432.
oecd sids initial assessment report for tmhda. (2006). series on testing and assessment, no. 53. paris: oecd publishing.

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

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

about us company info

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

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

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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

other products:

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