| 摘要 |
PURPOSE:To obtain a photosensitive material which is developable with alkali and applicable to a hardly adhesive material by mixing a crosslinking agent having plural ethylenically unsaturated bonds and an optical activator with a specific two kinds of copolymers. CONSTITUTION:(A) A copolymer having an acid value of 5-180 and a molecular weight of 1,500-100,000 obtained by reacting a compound having one oxirane ring and one ethylenically unsaturated bond respectively to a carboxyl group of a copolymer represented by formulaI(wherein Ar is phenyl, etc.; R1 is H, methyl; R2 is lower alkyl; m1>=m2) and (B) a copolymer having a molecular weight of 50,000-500,000 represented by formula II (wherein R1 is H, methyl; R2 is lower alkyl, R3 is benzyl, etc.) are mixed in a ratio of A/B=0.5-20. Further, the mixture is mixed with a crosslinking agent having >=2 ethylenically unsaturated bonds and an optical activator to obtain an aimed photosensitive material.
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