2-Hydroxyethyl Methacrylate

2-Hydroxyethyl Methacrylate (CAS 868-77-9), commonly known as HEMA, is a hydroxyl-functional methacrylate monomer used to introduce reactive sites into polymer networks.

Where is 2-Hydroxyethyl Methacrylate used?

• Coatings: reactive diluent and crosslinking co-monomer in UV- and peroxide-cured systems, improving film hardness and adhesion to metal and plastic
• Adhesives and sealants: hydroxyl functionality supports bonding in acrylic and methacrylate systems, including composites for aerospace structures
• Electronics: HEMA-based resins in conformal coatings and encapsulants with controlled cure profiles
• In construction it contributes to polymer-modified mortars and structural bonding adhesives.

Good to know: An inhibitor is typically added to prevent premature polymerization during storage and transport. Technical and high-purity grades are offered depending on end-use sensitivity, particularly for electronics and optical applications.

Commercial specifications

• Purity levels commonly at 97% or higher