Patent · US Expired

Substantially light-insensitive black and white thermographic recording material with improved stability to direct sunlight

US6326331A · kind A · utility

0Cited by
0References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 30, 1999
Grant dateDec 4, 2001
Priority date—
Expiry dateNov 30, 2019

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03C2001/7635
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A substantially light-insensitive black and white non-chlorine-containing stabilizer-containing monosheet thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the non-chlorine-containing stabilizer is selected from the group consisting of 2-(2'-hydroxyphenyl)benzotriazole derivatives and 2-hydroxy-benzophenone derivatives; a thermographic recording process therefor; and the use thereof as a stabilizer against direct sunlight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.