PHOTOSENSITIVE COMPOSITION FOR FLEXOGRAPHIC PLATE MATERIAL

摘要

To provide a photosensitive composition which can yield a flexographic plate material having good properties as a plate material and a good solvent ink resistance at a high productivity. A photosensitive composition for flexographic plate material comprising: (1) 5-98 wt.% of a photopolymerizable composite rubber having a gel fraction of 0.5 % or less, prepared by reacting; (a) a photopolymerizable diene/urethane-modified acrylate represented by general formula (1), wherein R represents C2-C8 alkylene or polyoxyalkylene; R1 represents H or CH3; R2 and R3 represent each the residue of a diisocyanate compound; R4 represents the residue of a dihydric alcohol having a molecular weight of 2,000 or less and represented by general formula (2), (wherein R5 represents C2-C8 alkylene or polyoxyalkylene, and R6 and R7 represent each H, CH3, (meth)acryloyloxy or allyloxy); X represents a non-hydroxylated part of a liquid hydroxylated diene rubber; l represents an integer of 1 to 4; 1 < m