Photo- and/or thermo-curable copolymer, curable resin compositions, and cured articles

Abstract

Disclosed is a photo- and/or thermo-curable copolymer having polymerizable unsaturated groups in side chains, which is obtainable by reacting a copolymer (P) with an epoxy-containing polymerizable unsaturated compound (C), the copolymer (P) containing monomer units derived from a carboxyl-containing polymerizable unsaturated compound (A) and monomer units derived from at least one epoxy-containing polymerizable unsaturated compound (B) represented by following Formula (1) or (2), in which the epoxy group of the epoxy-containing polymerizable unsaturated compound (C) has been added to part of the carboxyl groups of the copolymer (P). In the formulae, Ras each represent hydrogen or hydroxyl-substituted or -unsubstituted alkyl having 1 to 4 carbon atoms; and Rbs each represent single bond or alkylene having 1 to 18 carbon atoms which may contain heteroatom(s). The curable copolymer is highly stably synthesized and stored, has satisfactory curing properties, and permits both epoxy crosslinking and radical crosslinking.

Dependencies are inferred from the claim text.