| 摘要 |
PURPOSE:To obtain the titled composition having improved print strength of a printing plate and reproducibility of image by using the composition composed of a specific modified rubber, a compd. capable of an addition polymerization and a photopolymerization initiator. CONSTITUTION:The titled composition comprises the modified rubber (A) obtd. from a rubber having an unsatd. binding, the compd. (B) which is capable of the additional polymerization and has >=1 ethylenic double bonds, and the photopolymerization initiator (C). The component (A) is produced by allowing the rubber contg. the unsatd. bonding such as polybutadiene, in the presence of a Lewis acid such as SnCl4, to react with an org. compd. having -CH=N- bonding in a molecular such as benzylidene butylamine and an org. acid halide such as acetylhalide. The component (B) is exemplified by di(meth)acrylate of 1,4-butanediol, etc. The component (C) is exemplified by alkylether of benzoin. |
