| 摘要 |
PURPOSE:To obtain the planographic printing plate which can be easily produced and has a good coating property by incorporating a polymer having a polyorganosiloxane unit in the side chain into an ink repulsive layer and photosensitive layer. CONSTITUTION:The graft polymer having the polyorganosiloxane unit in the side chain (branch polymer) is used for the ink repulsive layer and the graft polymer having the polyorganosiloxane unit in the side chain is incorporated into the photosensitive layer as well. Namely, the ink repulsive layer and the photosensitive layer contain the polymers having the polyorganosiloxane unit in the side chain. The adhesive strength at the boundary is obtd., if the graft polymer having the polyorganosiloxane in the branch polymer is used in the ink repulsive layer and further the graft polymer having the polyorganosiloxane in the branch polymer is incorporated into the photosensitive layer in such a manner. In addition, the production is facilitated and the coating property is improved. |
