Ammonium aryl hydrazide compounds

Details Ammonium aryl hydrazide compounds Ammonium aryl hydrazide compounds

1991-01-30

1992-07-14

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C24334

Patent

active

051304805

ABSTRACT:
Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively low pH values and have low fog and low tendency to form black spots in unexposed or slightly exposed areas.

REFERENCES:
patent: 2563785 (1951-08-01), Ives
patent: 2670348 (1952-06-01), Gregory et al.
patent: 3386831 (1968-06-01), Honig et al.
patent: 4031127 (1977-06-01), Leone et al.
patent: 4224401 (1980-09-01), Takada et al.
patent: 4965168 (1990-10-01), Yoshida et al.
Chemical Abstracts, vol. 99, No. 19, Abstract 15819Sn, p. 596, Nov. 7, 1983, Katritzky, et al.

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