A high molecular compound having monomer chain of which homopolymer being rubber and a photopolymerizable resin composition containing the same as a main component.

摘要

There is provided a novel high molecular compound having a number average molecular weight of 5,000 to 30,000 which has (a) a styrenic or acrylic monomer chain part and (b) another monomer chain part of which homopolymer being rubber, said chain part (a) and said chain part (b) being present in block-like or graft-like state, and which containing 50 % or more of said monomer chain part (a) on the basis of a weight ratio. There is also provided a novel photopolymerizable resin composition which comprises: (i) a high molecular compound having a number average molecular weight of 5,000 to 30,000 which has (a) a styrenic or acrylic monomer chain part and (b) another monomer chain part of which homopolymer being rubber, said chain part (a) and said chain part (b) being present in block-like or graft-like state, and which containing 50 % or more of said monomer chain part (a) on the basis of a weight ratio, (ii) a photopolymerizable compound having two or more groups selected from the group consisting of acryloyl group and methacryloyl group in one molecule, and (iii) a photopolymerization initiator.