Stabilized, aqueous hydrazide solutions for photographic element

Details Stabilized, aqueous hydrazide solutions for photographic element Stabilized, aqueous hydrazide solutions for photographic element

1991-04-11

1992-09-15

Van Le, Hoa

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430598, 430607, 430613, G03C 134

Patent

active

051477564

ABSTRACT:
A process for stabilizing aqueous solution of aryl hydrazides is described. These solutions may be made by the addition of a stabilizing amount of ascorbic acid, isoascorbic acid, erythorbic acid, tartaric acid, citric acid. glucose and a cyclodextrin, etc., or mixtures, for example. When aqueous solutions of aryl hydrazides containing these stabilizers/antioxidants are prepared, the solution will have a shelf life of up to 30 days compared to 1-3 hours of solutions without the stabilizer/antioxidant. The stabilized aryl hydrazide is useful in photographic silver halide emulsions, etc.

REFERENCES:
patent: 4937160 (1990-06-01), Ruger
Research Disclosure 23510, Nov. 1983.

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