Stabilized thermal-dye-bleach constructions

Details Stabilized thermal-dye-bleach constructions Stabilized thermal-dye-bleach constructions

G - Physics

03

C

G03C 1/83 (2006.01) B41M 5/28 (2006.01) G03C 1/498 (2006.01)

Patent

CA 2135448

Certain poly(lactic acid) and poly(glycolic acid) polymers or copolymers, and certain carbonates, lactones, lactates, lactylates, lactides, glycolates, glycolylates, and glycolides have been found to stabilize thermal-dye-bleach constructions containing a dye in association with a thermally-generated-bleaching agent. Preferably, the thermally-generatated-bleaching agent is a thermal-carbanion-generating agent such as a quaternary ammonium salt of a phenylsulfonylacetic acid or a thermal-nucleophile-generating agent such as an ammonium salt of a phenylsulfonylacetic acid. These materials have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic elements.

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