| 摘要 |
PURPOSE:To obtain a photosensitive resin compsn. being developable with an aq. developing soln., having sufficient resistance to water-base ink, and having sufficient elasticity and flexibility suitable for flexographic printing by using a dienic copolymer contg. partly crosslinked amino groups for a base material. CONSTITUTION:The title photosensitive resin compsn. contains a copolymer consisting of 20-90mol.% conjugated dienic compd. A, 1-60mol.% alpha,beta-ethylenic unsatd. compd. B having a tertiary N atom, 0.1-10mol.% polyfunctional vinyl compd. C, and 5-80mol.% monoolefinic unsatd. compd. D other than B together with a photopolymerizable unsatd. monomer and a photopolymn. initiator. If necessary, 0.01-2pts.wt. preservation stabilizer is added to 100pts.wt. copolymer in this compsn. By this constitution, a flexographic resin plate having sufficient water resistance, rubbery elasticity, transparency, workability, mechanical characteristics developability with dil. acid, and developability with water, is obtd. |
