Sterically hindered photographic coupler solvents and photograph

Details Sterically hindered photographic coupler solvents and photograph Sterically hindered photographic coupler solvents and photograph

1985-12-24

1987-08-04

Schilling, Richard C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430551, 430634, 430635, G03C 140, G03C 732

Patent

active

046846069

ABSTRACT:
Photographic coupler solvents comprising aromatic carboxylic esters such as phthalates and isophthalates having bulky or branched ester substituents are described for incorporation in photographic emulsions and elements. The solvents are preferably employed in the cyan layer to protect the cyan dye against ferrous ion reduction. The solvents also provide improvements in yellow dye stability to light, cyan dye stability in the dark and magenta dye stability to heat and light.

REFERENCES:
patent: 2322027 (1943-06-01), Jelley et al.
patent: 3475172 (1969-10-01), Bright et al.
patent: 3779765 (1973-12-01), McCrossen et al.
patent: 4193802 (1980-03-01), Mukunoki et al.
patent: 4308328 (1981-12-01), Salyer et al.
patent: 4327175 (1982-04-01), Toda et al.
patent: 4407940 (1983-10-01), Nakamura et al.
patent: 4451558 (1984-05-01), Sagita et al.
Research Disclosure No. 16744, Mar. 1978, pp. 13-14.

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