Ethoxylated trimethylolpropane triacrylate

Ethoxylated trimethylolpropane triacrylate (CAS 28961-43-5), abbreviated EO-TMPTA, is a trifunctional acrylate monomer used as a reactive diluent and crosslinker in UV- and EB-curable systems.

Where is Ethoxylated trimethylolpropane triacrylate used?

• UV-curable coatings and varnishes: controls crosslink density while maintaining surface hardness
• Wood, plastic and paper coatings for industrial use
• Printing inks: fast cure response and adhesion on flexible substrates
• Flexographic and offset UV inks for high-speed production lines
• Adhesives and sealants: tunes elongation and peel strength in radiation-cured systems
• It supports high-gloss, scratch-resistant surfaces with reduced shrinkage stress.

Good to know: Ethoxylation distinguishes it from standard TMPTA by reducing skin sensitization potential and improving flexibility in cured films. Proper handling and storage are required to maintain stability and performance over time.

Commercial specifications

• Ethoxylation levels typically specified by moles of ethylene oxide per hydroxyl group; buyers should confirm with suppliers
• Bulk, IBC and drum packaging