PROCESS FOR PRODUCING ACRYLIC POLYMER HAVING POLYMERIZABLE UNSATURATED BOND

摘要

A process for producing an acrylic polymer (A) having polymerizable unsaturated bonds. Upon solvent volatilization, the polymer gives a coating film which has a tack-free surface, does not suffer adhesion of foreign matters or dust particles thereto, and has a satisfactory surface state. The polymer has excellent curability and gives a cured coating film excellent in chemical resistance ad flexibility. It is suitable for use in actinic-energy-ray-curable resin compositions. The process is characterized in that an epoxidized copolymer (c) obtained by the copolymerization of a polymerizable unsaturated compound (a) having, per molecule, one or more epoxy groups and one polymerizable unsaturated bond and a polymerizable unsaturated compound (b) having one polymerizable unsaturated bond per molecule other than the ingredient (a) is reacted with a short-chain unsaturated carboxylic acid (d1) having a molecular weight less than 150 and a long-chain unsaturated carboxylic acid (d2) having a molecular weight of 150 or higher to thereby synthesize the acrylic polymer (A).