Patent ID: 6902880
Filing Date: 2005-06-07
Classification: G03C,Y10S

Abstract:
1. A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one stabilizer selected from the group consisting of 1-(5-mercapto-1-tetrazolyl)-acetyl compounds represented by formula (I): wherein R 1 is —NR 2 R 3 , —OR 4 or an optionally substituted aryl or heteroaryl group; R 2 is hydrogen or an optionally substituted alkyl, aryl or heteroaryl group; R 3 is an optionally substituted aryl or heteroaryl group; and R 4 is an optionally substituted aryl group; and compounds with two or more groups represented by formula (II): where Q comprises the necessary atoms to form a 5- or 6-membered unsaturated heterocyclic ring, A is hydrogen, a counterion to compensate the negative charge of the thiolate group or two or more A groups provide a linking group between the two or more groups represented by formula (II).