| 摘要 |
PURPOSE:To provide a damping waterless lithogrpahic printing plate with the releasability improved after a light-transmissive and oxygen-impermeable coating layer is exposed. CONSTITUTION:A photopolymerizable photosensitive layer, a silicone rubber layer and a light-transmissive and oxygen-impermeable coating layer are laminated on a substrate. The silicone rubber layer is cross-linked and cured by the addition reaction of identicalSi-H group and -CH=CH- group and contains a compd. shown by formula I or II. In the formulas, R<1> is hydrogen or alkyl, R<2> and R<3> are hydrogen or a substituent (e.g. hydrogen, cyano, sulfo, carbonyl or alkyl), L is -COO-, -CONH- or phenylene, X is a bivalent connecting group, Y is alkylene, arylene, aralkylene, -SO2N(R<4>)-, -CON(R<4>)-, -N(R<4>)CO-, -N(R<4>)SO2-, -N(R<4>)-, -COO-, -OCO-, -SO2, -S- or -O-, R<4> is hydrogen or alkyl, G<1> and G<2> are -OH or a group forming -OH by hydrolysis, G<3> is sulfonamide or carbamide, (m), (n), (p) and (q) are 0 or 1, q=0 when p=1, and q=1 when p=0. |
