Hydrazide redox-dye-releasing compounds for photothermographic elements
US5492803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/408
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising: PA1 (a) a photosensitive silver halide; PA1 (b) a non-photosensitive, reducible source of silver; PA1 (c) a reducing agent for the non-photosensitive reducible silver source; and PA1 (d) a binder; wherein the reducing agent is a hydrazide redox-dye-releasing compound of the general formulae: ##STR1## wherein: D represents the chromophore of a thermally mobile dye; X represents a single bond or a divalent linking group; R.sup.1 and R.sup.2 independently represent an organic group; and n.gtoreq.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.