What is Trimethylolpropane Triacrylate TMPTA CAS 15625-89-5?

Trimethylolpropane Triacrylate, commonly abbreviated TMPTA, is a trifunctional acrylate monomer with molecular formula C15H20O6. It is used as a reactive diluent and crosslinker in UV/EB-curable coatings, inks and adhesives, not as a finished formulation.

Why is TMPTA called a trifunctional reactive diluent?

Each TMPTA molecule contains three acrylate groups, so it can form a highly crosslinked network during free-radical curing. This raises coating hardness, chemical resistance and abrasion resistance compared with mono- or difunctional diluents, while still reducing formulation viscosity.

What viscosity and density should be expected for TMPTA?

TMPTA is a clear to light-yellow liquid with density around 1.1 g/cm3 and viscosity typically in the range of about 70-122 mPa.s. Its relatively low viscosity for a trifunctional monomer makes it useful for balancing cure speed and application properties.

Why is MEHQ inhibitor added to TMPTA?

TMPTA can polymerise unintentionally during storage or transport, so MEHQ is added as a stabiliser, commonly at about 100-600 ppm. The inhibitor level should be considered because it affects induction time and may need adjustment for a specific UV/EB curing process.

Is TMPTA the same as trimethylolpropane trimethacrylate?

No. TMPTA is a triacrylate, while trimethylolpropane trimethacrylate has methacrylate groups and different reactivity and physical properties. The two are not interchangeable in a UV/EB-curable formulation without reformulation and performance testing.

Trimethylolpropane Triacrylate (TMPTA) CAS 15625-89-5

Trimethylolpropane Triacrylate, commonly abbreviated TMPTA, CAS 15625-89-5, is a trifunctional reactive acrylate monomer supplied for UV/EB-curable coatings, inks and adhesive systems. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 15625-89-5
Synonyms: TMPTA, TMP triacrylate
Einecs: 239-701-3
Molecular Formula: C₁₅H₂₀O₆ (nominal)
Grade: Industrial UV/EB-curable grade
Package: 200 kg steel drums; 1,000 kg IBCs by agreement

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Product Description

Trimethylolpropane Triacrylate (TMPTA) CAS 15625-89-5 is TMP triacrylate, with EC 239-701-3 and molecular formula C₁₅H₂₀O₆ (nominal).

Synonyms: TMPTA; TMP triacrylate.

CAS: 15625-89-5.

Molecular formula: C₁₅H₂₀O₆ (nominal).

It is supplied as a clear to light-yellow liquid.

It is positioned as a trifunctional reactive acrylate monomer for UV/EB-curable coatings, inks and adhesive systems.

It is a crosslinking diluent or formulation raw material, not a finished UV coating, printing ink or trimethacrylate substitute.

It is used in UV/EB-curable industrial coatings and overprint varnishes.

It is used in radiation-curable printing-ink and graphic-arts formulations.

It is used in energy-curable adhesive and resin systems.

It is used in reactive-diluent blends requiring a named triacrylate monomer.

Each molecule contains three acrylate groups, so it forms a highly crosslinked network during free-radical curing.

It raises coating hardness, chemical resistance and abrasion resistance compared with mono- or difunctional diluents.

It has a density around 1.1 g/cm3 and viscosity typically about 70-122 mPa.s.

MEHQ inhibitor is added, commonly at about 100-600 ppm, and its level should be considered for the UV/EB curing process.

Confirm monomer identity, colour, viscosity, inhibitor profile and relevant assay controls.

Store in tightly closed containers in a cool, dry, well-ventilated area, use suitable PPE when handling, and follow the current SDS.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Trimethylolpropane Triacrylate TMPTA CAS 15625-89-5?

A: Trimethylolpropane Triacrylate, commonly abbreviated TMPTA, is a trifunctional acrylate monomer with molecular formula C15H20O6. It is used as a reactive diluent and crosslinker in UV/EB-curable coatings, inks and adhesives, not as a finished formulation.
Q:
Why is TMPTA called a trifunctional reactive diluent?

A: Each TMPTA molecule contains three acrylate groups, so it can form a highly crosslinked network during free-radical curing. This raises coating hardness, chemical resistance and abrasion resistance compared with mono- or difunctional diluents, while still reducing formulation viscosity.
Q:
What viscosity and density should be expected for TMPTA?

A: TMPTA is a clear to light-yellow liquid with density around 1.1 g/cm3 and viscosity typically in the range of about 70-122 mPa.s. Its relatively low viscosity for a trifunctional monomer makes it useful for balancing cure speed and application properties.
Q:
Why is MEHQ inhibitor added to TMPTA?

A: TMPTA can polymerise unintentionally during storage or transport, so MEHQ is added as a stabiliser, commonly at about 100-600 ppm. The inhibitor level should be considered because it affects induction time and may need adjustment for a specific UV/EB curing process.
Q:
Is TMPTA the same as trimethylolpropane trimethacrylate?

A: No. TMPTA is a triacrylate, while trimethylolpropane trimethacrylate has methacrylate groups and different reactivity and physical properties. The two are not interchangeable in a UV/EB-curable formulation without reformulation and performance testing.

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