| 摘要 |
A photopolymerizable composition comprising a copolymer having a number average molecular weight of about 20,000 to 70,000, said copolymer being obtained by copolymerizing a conjugated diene compound, an alpha , beta -ethylenically unsaturated carboxylic acid and a monoene compound, an N-substituted maleimide compound or a mixture of an N-substituted maleimide compound and an ethylenically unsaturated compound, and a photopolymerization initiator. The photopolymerizable composition, after exposure to actinic rays, can be developed with an aqueous developer to produce a flexographic printing plate improved in handling characteristics and printing durability. |
