Patent ID: 8187411

Claim:
A composition comprising (A1): a (meth)acrylate with a molecular weight of at least 500 having at least one (meth)acryloyl group at a terminal or in a side chain of a molecule, wherein (A1) is selected from the group consisting of 1,2-polybutadiene-terminated urethane (meth)acrylates, and 1,4-polybutadiene-terminated urethane (meth)acrylates, (B1): a polyfunctional (meth)acrylate, (C1): a (meth)acrylate other than said (A1) and (B1), wherein (C1) is at least one (meth)acrylic acid derivative monomer selected from the group consisting of phenol 2-mol ethylene oxide-modified (meth)acrylate, n-(meth)acryloyloxyalkyl hexahydrophthalimides, and (meth)acrylic acid derivative monomers represented by general formula (C3): Z—O—(R 2 O) P —R 1 General Formula (C3) wherein Z represents a (meth)acryloyl group, R 1 is a phenyl group or a phenyl group having an alkyl group with 1 to 3 carbon atoms, R 2 is —C 2 H 4 —, —C 3 H 6 —, —CH 2 CH(CH 3 )—, —CH 2 CH(OH)CH 2 —, —C 4 H 8 — or —C 6 H 12 —, and p an integer of from 1 to 10, and (D1): a photopolymerization initiator.