Patent ID: 6777156
Filing Date: 2004-08-17
Classification: B41C

Abstract:
A directly imageable planographic printing plate precursor comprising a substrate and, on the substrate, a heat sensitive layer and, on the heat sensitive layer, an ink repellent layer, said heat sensitive layer comprising a light-to-heat conversion material, a binder polymer, an active hydrogen-group containing compound and a metal-containing organic compound, wherein the active hydrogen-group containing compound is selected from a group consisting of a phenol formaldehyde novolak resin, a resol resin, a resorcinol benzaldehyde resin, a pyrogallol acetone resin, a hydroxystyrene polymer or copolymer, a rosin-modified phenolic resin, an epoxy-modified phenolic resin, a lignin-modified phenolic resin, an aniline-modified phenolic resin, and a melamine-modified phenolic resin, further wherein the binder polymer is selected from a group consisting of vinyl polymers, unvulcanized rubber, polyoxides, polyesters, polyurethane and polyamides.