| 摘要 |
PURPOSE:To make it possible to develop the subject composition with a water- based developer, and to improve the durability of the composition against a water base ink after photocuring the composition by incorporating two kinds of specified conjugated diene copolymers in the composition. CONSTITUTION:The composition for a flexoprinting plate is composed of 50-90 pts.wt. of the conjugated diene copolymer (A), 10-50pts.wt. of the conjugated diene copolymer (B), 10-200pts.wt. of a photopolymerizable unsatd. monomer per 100pts.wt. of the total of the components A and B, and 0.1-10pts.wt. of a photopolymerization initiator per 100pts.wt. of the total of the components A and B. The component (A) is composed of 40-90mol.% of a conjugated diene unit (a), 0.5-10mol.% of an alpha,beta-ethylenically unsatd. carboxylic acid unit (b), 0.1-5mol.% of a polyfunctional vinyl compd. unit and 0-59.4mol.% of a monoolefinic unsatd. compd. unit (c). The component (b) is composed of 30-90mol.% of the component (a), 0-30mol.% of the component (b) and 5-70mol.% of the component (c), and is composed of the copolymer having a number- average mol.wt. of 5,000-100,000. |
