5-(1,2,4)-triazolyl-S-triazines

Details 5-(1,2,4)-triazolyl-S-triazines 5-(1,2,4)-triazolyl-S-triazines

1986-10-10

1991-01-29

Ford, John M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544212, 544198, C07D40312, C07D40314

Patent

active

049888110

ABSTRACT:
Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azomethine group, whose methine group is substituted with a 5-amino-1,2,4-triazolyl group, and/or copper complex compounds thereof.
Preferably said direct positive photographic elements are multi-layer elements comprising internal latent image type type silver halide emulsion layers sensitized to different regions of the visible light and associated with image-dye providing compounds (photographic color couplers).

REFERENCES:
patent: 4115122 (1978-09-01), Adachi et al.

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