Stabilizers for use in thermographic recording materials

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

Reexamination Certificate

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Details

C430S600000, C430S603000, C430S614000, C430S615000, C503S201000, C503S212000

Reexamination Certificate

active

11000407

ABSTRACT:
A black and white monosheet thermographic recording material comprising a support and a thermosensitive element, the 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 five-membered heterocyclic ring compound selected from the group consisting of optionally substituted, optionally annelated 1-thia-2,3-diazole compounds; optionally substituted, optionally annelated 1-thia-2,5-diazole compounds; optionally substituted 1-thia-2,4-diazole compounds; optionally substituted 1-thia-3,4-diazole compounds; optionally substituted thiatriazole compounds; optionally substituted, optionally annelated 1-seleno-2,3-diazole compounds; optionally substituted, optionally annelated 1-seleno-2,5-diazole compounds; optionally substituted 1-seleno-2,4-diazole compounds; optionally substituted 1-seleno-3,4-diazole compounds; and optionally substituted selenotriazole compounds, with the proviso that the at least one compound is not substituted with or contain a mercapto, a —SO2CBr3, a —S-alkylene-COOH or a N-acyl-hydrazine group.

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