Patent ID: 6331386
Filing Date: 2001-12-18
Classification: G03C

Abstract:
A photothermographic element, comprising a non-photosensitive organic silver salt, a photosensitive silver halide formed independent of the non-photosensitive organic silver salt, and a binder on a support, whereina polymer latex constitutes at least 50% by weight of the binder in an image forming layer on one surface of said support containing the photosensitive silver halide, the image forming layer has been formed by applying a coating solution in which at least 60% by weight of a solvent is water,the image forming layer or another layer on the one surface of said support contains at least one compound selected from compounds of the following formulae (A) and (B) and has been formed by applying a coating solution having added thereto a water dispersion of said compound, ##STR229##wherein Z.sub.1 is a group of non-metallic atoms completing a 5- to 7-membered cyclic structure, Y.sub.1 is --C(.dbd.O)-- or --SO2--, X.sub.1 is --O.(1/k)M or --S.(1/k)M, M is a cation, and k is the valence of M, ##STR230##wherein Z.sub.2 is a group of non-metallic atoms completing a 5- to 7-membered cyclic structure, Y.sub.2 is --C(.dbd.O)-- or --S.sub.2 --, X.sub.2 is --O.(1/k)M or --S.(1/k)M, M is a cation, k is the valence of M, and Y.sub.3 is hydrogen or an optionally substituted substituent selected from the group consisting of alkyl, aryl, heterocyclic, cyano, acyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, amino, alkylamino, arylamino, heterocyclicamino, acylamino, sulfonamide, ureido, thioureido, imide, alkoxy, aryloxy, alkylthio, arylthio and heterocyclicthio.