DRY TYPE PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE

摘要

PURPOSE:To improve the inter-layer adhesive powder between a photosensitive layer and silicone rubber layer and to prevent the decrease of the inter-layer adhesive powder even after lapse of a long period of time by forming the silicone rubber layer by using a specific silicone rubber compsn. CONSTITUTION:The silicone rubberof the dry type photosensitive lithographic printing plate contg. the photodimerization type photosensitive layer and the silicone rubber layer contiguous to the photosensitive layer is formed of the silicone rubber compsn. contg. organopolysiloxane and reactive silane compd. having an allyl isocyanurate group. The amt. of the reactive silane compd. to be added is 0.5-10%, more preferably 1-5% by the amt. of the linear org. polysiloxane. The poor developability and image reproducibility are resulted if said compd. is excessively added to the compsn. The substantial adhesive power is not obtainable if the compd. is added too little.