Patent ID: 7060655

Claim:
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 2-mercapto-benzothiazole compound represented by: or by formula (I): wherein R 1 , R 2 , R 3 and R 4 are independently hydrogen, an optionally substituted alkyl group, an optionally substituted aryl group, an alkoxy group, an ester group, a carbamate group, a carbonato group, a SO 2 R 5 group, a —NR 6 R 7 group, a nitro group, a cyano group, an acyl group; a halogen atom, an optionally alkyl or alkoxy-substituted —SO 2 NH-phenyl group, a perfluoro-alkyl group, a —CONHR 8 group, a —NHOCR 9 group, a —OCOOR 10 group or a —NHCOOR 11 group; R 3 is an aryl group or an optionally substituted alkyl group; R 9 , R 10 and R 11 are independently an optionally substituted alkyl or an aryl group; R 6 , R 7 and R 8 are independently a hydrogen atom, an optionally substituted alkyl group or an acyl group; R 1 and R 2 together, R 2 and R 3 together and R 3 and R 4 together can independently represent the atoms necessary to form a carbocyclic, aromatic, heteroaromatic or heterocyclic ring with the proviso that at least one of R 1 , R 2 , R 3 and R 4 is not hydrogen.