2-hydroxypropyl methacrylate

2-Hydroxypropyl methacrylate (CAS 923-26-2), also known as HPMA or propylene glycol monomethacrylate, is a reactive hydroxyl-functional monomer used to introduce pendant hydroxyl groups into acrylic polymer chains.

Where is 2-hydroxypropyl methacrylate used?

• Coatings: reacts with isocyanate or melamine crosslinkers to produce two-component polyurethane topcoats with improved hardness and chemical resistance
• Adhesives and sealants: hydroxyl-functional acrylic backbones that bond to metal, glass and plastic
• UV-curable printing inks and packaging coatings: reactive diluent that reduces viscosity and contributes to cure speed and film flexibility
• Plastics: comonomer to tailor glass transition temperature and surface functionality of acrylic resins
• It enables controlled crosslinking and adhesion in polymer systems.

Good to know: Typically supplied in inhibited form to prevent premature polymerization during storage and transport.

Commercial specifications

• Purity commonly 97% or higher for industrial use
• Bulk quantities in drums and IBC totes; tank truck supply for high-volume buyers