Photographic coupler dispersions

Details Photographic coupler dispersions Photographic coupler dispersions

1987-04-20

1988-08-23

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430636, 252332, 252335, 252336, 252337, 252338, 252339, G03C 734, G03C 732

Patent

active

047660619

ABSTRACT:
Loss in dark stability of a photographic silver halide element can be reduced by introducing into a dispersion comprising a dye-forming coupler for preparing such an element, a lipophilic anionic surfactant which comprises a sulphate or sulphonate group as the sole hydrophilic group and either a single aliphatic hydrocarbon group having at least 15 carbon atoms or two or more aliphatic hydrocarbon groups which together contain at least 17 carbon atoms. A second, less lipophilic, anionic surfactant can also be used in preparing the coupler dispersion.

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patent: 3948663 (1976-04-01), Shiba et al.
patent: 3963499 (1976-06-01), Shiba et al.
patent: 4140530 (1979-02-01), Trunley et al.
patent: 4146399 (1979-03-01), Trunley et al.
patent: 4207393 (1980-06-01), Snyder
patent: 4211836 (1980-07-01), Yoneyama et al.
patent: 4385110 (1983-05-01), Yoneyama et al.
Research Disclosure, Dec. 1978, Item No. 17643.

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