| 摘要 |
PURPOSE:To improve the peelability of a protective layer after image exposing by adding a specific silicone compd. to a silicone rubber layer. CONSTITUTION:The silicone compd. expressed by formula I is added to the silicone rubber layer of a damping waterless recording medium printing master plate. In formula, R1 and R2 denote an alkyl group or arom. group; R1 and R2 may be the same or different and either one thereof is an arom. group. R3 is an alkyl group of 1-4C which may be respectively the same or different. m:n=99:1-10:90mol.%. A PET film which is the protective film of the silicone rubber layer is thereby easily peeled from the silicone rubber layer and, therefore, the stable plate making is easily executed. |
