Resins curable with actinic energy ray, process for the production thereof, and photocurable and thermosetting resin composition

A method of producing an actinic energy ray-curable resin, characterized by comprising causing the reaction of (a) a polyfunctional oxetane compound containing at least two oxetane rings with (b) an unsaturated monocarboxylic acid and the subsequent reaction of (c) a polybasic acid anhydride with a primary hydroxyl group of the resultant modified oxetane resin (a′).

A curable composition, characterized by comprising (A) an actinic energy ray-curable resin which is obtained by causing the reaction of (a) an oxetane compound containing at least two oxetane rings with (b) an unsaturated monocarboxylic acid and the subsequent reaction of (c) a polybasic acid anhydride with a primary hydroxyl group of the resultant modified oxetane resin (a′) and has at least one structure represented by the following general formula (1) and (B) a polymerization initiator.

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• wherein R1 represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, R2, R3 and R4 independently represent a hydrogen atom, an alkyl group of 1 to 6 carbon atoms, an aryl group, an aralkyl group, a cyano group, a fluorine atom, or a furyl group, and X represents a polybasic acid anhydride residue.

A photocurable and thermosetting resin composition, characterized by comprising (A) an actinic energy ray-curable resin having at least one structure represented by the following general formula (1), (B) a polymerization initiator, (C) a diluent, and (D) an oxetane compound containing at least two oxetane rings in its molecule.

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• wherein R1 represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, R2, R3 and R4 independently represent a hydrogen atom, an alkyl group of 1 to 6 carbon atoms, an aryl group, an aralkyl group, a cyano group, a fluorine atom, or a furyl group, and X represents a polybasic acid anhydride residue.