Patent ID: 7045487
Filing Date: 2006-05-16
Classification: G03C

Abstract:
1. A black and white monosheet substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is selected from compounds represented by formula (I): wherein R 1 is an alkyl group optionally substituted with a hydroxy, carboxy, carboxy ester, acyl or carbonato group; x is S, O or N—R 6 ; R 6 is an optionally substituted alkyl group; R 2 , R 3 , R 4 and R 5 independently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or at least one of R 2 and R 3 , R 3 and R 4 and R 4 and R 5 independently represent the atoms necessary to form a carbocyclic or heterocyclic group or at least one of R 1 and R 5 and R 2 and R 6 independently represent the atoms necessary to form a heterocyclic ring; and compounds represented by formula (II): wherein R 7 is an optionally substituted alkyl group; Y is S, O or N—R 10 ; R 10 is an optionally substituted alkyl group; R 8 and R 9 independently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or R 8 and R 9 represent the atoms necessary to form a heterocyclic or a non-aromatic carbocyclic ring or at least one of R 8 and R 10 and R 9 and R 7 independently represent the atoms necessary to form a heterocyclic ring; and both R 8 and R 9 cannot both be an alkyl group.