Patent ID: 6232059
Filing Date: 2001-05-15
Classification: G03C

Abstract:
A thermographic recording element having at least one image forming layer and comprising an organic silver salt, a reducing agent, and at least one of compounds of the following formulas (A) or (B):(A) ##STR135##(B) ##STR136##wherein Z.sub.1 and Z.sub.2 each are a group of non-metallic atoms capable of forming a 5- to 7-membered ring structure,Y.sub.1 and Y.sub.2 each are --C(.dbd.O)-- or --SO.sub.2 --,X.sub.1 and X.sub.2 each are hydroxy or salt thereof, alkoxy, aryloxy, heterocyclic oxy, mercapto or salt thereof, alkylthio, arylthio, heterocyclic thio, amino, alkylamino, arylamino, heterocyclic amino, acylamino, sulfonamide or heterocyclic group, said heterocyclic group is selected from the group consisting of N-methylhydantoin, N-phenylhydantoin, succinimide, phthalimide, N,N'-dimethylurazolyl, imidazole, benzotriazole, indazoyl, morpholino, and 4,4-dimethyl-2,5-dioxo-oxazoyl, andY.sub.3 is hydrogen or a substituent.