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.

It enables controlled crosslinking and adhesion performance across a broad range of polymer systems. In coatings formulations, HPMA reacts with isocyanate or melamine crosslinkers to produce two-component polyurethane.

These acrylic topcoats offer improved hardness and chemical resistance. Adhesive and sealant manufacturers incorporate it to build hydroxyl-functional acrylic backbones that bond well to metal, glass, and plastic substrates.

In UV-curable printing inks and packaging coatings, it functions as a reactive diluent that reduces viscosity while contributing to cure speed and film flexibility for various industrial applications.

Plastics producers use it as a comonomer to tailor the glass transition temperature and surface functionality of acrylic resins for specialty applications requiring specific performance characteristics.

This chemical is supplied as a clear liquid, typically in inhibited form to prevent premature polymerization during storage and transport. Technical grade is the standard commercial offering for most buyers.

Purity levels are commonly at 97% or higher for industrial use. Bulk quantities are available in drums and IBC totes, with tank truck supply accessible for high-volume buyers in the chemical sector.