| 摘要 |
PURPOSE:To obtain a wholly or partially saponified polyvinyl acetate type printing plate material good in water-developability, and superior in image reproductivity, ink receptivity, solvent resistance, and the like by incorporating a compd. having a specified ammonium base. CONSTITUTION:The photosensitive resin compsn. comprises 100pts.wt. of wholly or partially saponified polyvinyl acetate having a saponification degree of 50-100mol%, 20-200pts.wt. of a photopolymerizable monomer, and 0.5-50pts. wt. of the compd. having a mol.wt of <=2,000, and in the molecule an ammonium base represented by the formula shown on the right in which R1, R2, R3 are each 1-20 alkyl or aryl, and X<-> is a counter ion. As a result, the photosensitive resin compsn. superior in flexibility, solvent resistance, and durability, and useful for the photosensitive layer of the printing plate material, and good in water developability can be obtained. |
