Mono-2-(methacryloyloxy)ethyl maleate

Mono-2-(methacryloyloxy)ethyl maleate (CAS 51978-15-5), also known as HEMA maleate, is a bifunctional reactive monomer carrying both a methacrylate and a maleic acid half-ester group.

Where is Mono-2-(methacryloyloxy)ethyl maleate used?

• Electronics: photoresist formulations and adhesion-promoting coatings where carboxylic acid groups improve substrate bonding to metals and inorganic surfaces
• Printing and packaging: UV-curable inks and overprint varnishes for adhesion to low-energy substrates
• Adhesives: structural and pressure-sensitive formulations with crosslinkable acid sites
• Polymer modification: reactive compatibilizer grafted onto polymer chains for composite and laminate systems
• Its dual reactivity allows participation in free-radical polymerization while introducing pendant carboxylic acid functionality into polymer backbones.

Good to know: An inhibitor is typically added to prevent premature polymerization during storage and transit. Proper storage conditions are required to maintain stability.

Commercial specifications

• Packaging from small laboratory quantities to bulk drums