Photosensitive resin composition for flexographic printing plates
AssigneeTokyo Ohka Kogyo Co., Ltd.
InventorsHiroyuki Toda, Eiichi Otomegawa, Toshimi Aoyama, Hisashi Nakane
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Abstract
A photosensitive resin composition for flexographic printing plates comprising styrene-butadiene block copolymer containing 35 - 50% by weight of styrene, at least one liquid prepolymer having a molecular weight of 1,000 - 5,000 selected from the group consisting of polybutadiene and butadiene-styrene copolymer, at least one photopolymerizable monomer containing at least one vinyl group, such as tetraethyleneglycol diacrylate, a photopolymerization initiator such as benzophenone, and a thermopolymerization inhibitor optionally added. This photosensitive resin composition affords relief images suitable for use in flexographic printing.
Claims10
A photosensitive resin composition for flexographic printing plates comprising (a) styrene-butadiene block copolymer containing 35- 50% by weight of styrene, (b) at least one liquid prepolymer having a molecular weight of 1,000- 5,000 selected from the group consisting of polybutadiene and butadiene-styrene copolymer, and (c) at least one photopolymerizable monomer containing one or more vinyl groups.
Dependencies are inferred from the claim text.