Resins hydroxy ethyl groups

The use of hydroxy ethyl (also hydroxypropyl) methacrylate as a monomer permits the introduction of reactive hydroxyl groups into the copolymers. This offers the possibility for subsequent cross-linking with an HO-reactive difunctional agent (diisocyanate, diepoxide, or melamine-formaldehyde resin). Hydroxyl groups promote adhesion to polar substrates. 

The incorporation of hydroxy monomers such as hydroxy ethyl aoylate into the copolymer results in the formation of pendant hydroxyl groups, -OH, at intervals along the backbone of the polymer chain. These OH groups can be made to react with the methylol groups of amino formaldehyde and phenol formaldehyde resins to produce a coherent, resistant film. 

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