Patent ID: 6297001
Filing Date: 2001-10-02
Classification: G03C,Y10S

Abstract:
A photothermographic material comprising a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent, a binder and a cross-linking agent; the photothermographic material further comprising a compound capable of generating a labile species other than a halogen atom upon exposure to ultraviolet radiation or visible radiation to deactivate the reducing agent,said compound is a biimidazolyl compound represented by the following formula (1) or an iodonium compound represented by the following formula (2): ##STR69##wherein R.sub.1, R.sub.2 and R.sub.3 each are an alkyl group, an alkenyl group, an alkoxy group, an aryl group, hydroxy, a halogen atom, an aryloxyl group, an alkylthio group, an arylthio group, an acyl group, a sulfonyl group, an acylamino group, sulfonylamino group, an acyloxy group, carboxy, cyano, a sulfo group, or an amino group; ##STR70##wherein Q is a group of atoms necessary to complete a 5-, 6-, or 7-membered ring, and the atoms being selected from a carbon atom, nitrogen atom, oxygen atom and sulfur atom; R.sup.1, R.sup.2 and R.sup.3 each are a hydrogen atom, an alkyl group, an alkenyl group, an alkoxy group, an aryl group, hydroxy, a halogen atom, an aryloxyl, an alkylthio group, an arylthio group, an acyl group, a sulfonyl group, an acylamino group, sulfonylamino group, an acyloxy group, a carboxy group, a cyano group, a sulfo group, or an amino group, provided that R.sup.1, R.sup.2 and R.sup.3 may be bonded with each other to form a ring; R.sup.4 is a carboxylate group or O.sup.- ; W is 0 or 1, provided that when R.sup.3 is a sulfo group or a carboxy group, W is 0 and R.sup.4 is O.sup.- ; X.sup.- is an anionic counter ion.