Patent ID: 7307107

Claim:
A photopolymerizable composition comprising a polymerizable compound and a photopolymerization initiator, wherein the polymerizable compound comprises (a) a bifunctional (meth)acrylic acid (thio)ester compound containing a sulfur atom in the molecule represented by the following general formula (2): wherein R 5 is a chain alkylene group having one or more sulfur atoms in the group or R 5 is the following linking group; R 6 and R 7 are each independently a hydrogen atom or an alkyl group; and Z 1 and Z 2 are each independently an oxygen atom or a sulfur atom with the proviso that one of Z 1 and Z 2 is a sulfur atom in case R 5 is the following linking group: wherein R 13 is an alkyl group, an aralkyl group, an aryl group or a halogen atom; and r is an integer from 0 to 2, and (b) at least one of a (meth)acrylic acid ester compound represented by the following general formula (1) and a bifunctional (meth)acrylic acid ester compound having a urethane linkage: wherein R 1 and R 2 are each independently a hydrogen atom or a methyl group; R 3 and R 4 are each independently an alkyl group, an aralkyl group, an aryl group or a halogen atom; m and n are each an integer of 0 to 2; X 1 is an alkylidene group having 1 to 3 carbon atoms; and Y 1 and Y 2 are each independently a poly(oxyalkylene) group with the proviso that at least one of Y 1 and Y 2 is a poly(oxyalkylene) group having a hydroxy group.