Patent ID: 7423097

Claim:
A radiation curable resin composition comprising: a polyfunctional epoxy polymer (Component A) having a polybutadiene skeleton or a hydrogenated polybutadiene skeleton and two glycidyloxy groups at both terminals in the molecule; an oxetane compound (Component B) represented by Formula (1) below and/or a compound in which an optionally branched alkyl group having 8 to 30 carbons has one epoxy group (Component C) having 8 to 30 carbons; and a cationic photopolymerization initiator (Component X), wherein a number of parts of Component A added is 25 to 45 parts by weight relative to 100 parts by weight of the total resin components wherein R 1 denotes an optionally branched alkyl group having 6 to 30 carbons, or a phenyl group substituted with an alkyl group having 4 to 30 carbons, and R 2 denotes a hydrogen atom or an optionally branched alkyl group having 1 to 6 carbons, wherein a polyfunctional epoxy compound other than Component A and/or a polyfunctional oxetane compound are not contained at 10 parts or greater relative to 100 parts of the total resin components.