PHOTOSENSITIVE COMPOSITION, PHOTOSENSITIVE RUBBER PLATE AND PROCESS FOR PRODUCING THE PLATE, AND FLEXOGRAPHIC PLATE AND PROCESS FOR PRODUCING THE PLATE

摘要

A photosensitive composition comprising 35-80 parts by weight of a hydrophilic phosphate copolymer (A) prepared by copolymerizing a monomer mixture composed of 5-30 wt.% of an unsaturated phosphate monomer (a), 40-90 wt.% of a conjugated diene monomer (b) and 0-50 wt.% of a monoolefin monomer (c) other than the component (a), 65-20 parts by weight of a thermoplastic elastomer (B) (the total weight of components (A) and (B) being 100 parts by weight), 5-300 parts by weight of a photopolymerizable ethylenic monomer (C), and 0.1-10 parts by weight of a photopolymerization initiator. This composition is useful for producing photosensitive rubber plates and flexographic plates.