Trimethylolpropane triacrylate

Trimethylolpropane triacrylate (CAS 15625-89-5), known as TMPTA, is a trifunctional acrylate monomer acting as a reactive crosslinker and diluent in UV- and EB-curable systems.

Where is Trimethylolpropane triacrylate used?

• Coatings: crosslink density booster improving scratch resistance and chemical durability of cured films on automotive and industrial substrates
• Printing inks: reactive diluent for viscosity control without sacrificing cure speed or print resolution in energy-curable offset and flexographic inks
• Adhesives and sealants: cohesive strength and dimensional stability contributor
• Electronics: conformal coatings and encapsulants where fast cure and thermal resistance are process requirements
• Its three acrylate groups enable rapid network formation.

Good to know: Some suppliers offer low-skin-sensitization variants.

Commercial specifications

• Low-viscosity liquid in drum and IBC quantities
• Evaluated against viscosity, acid value, and inhibitor content