Sterically hindered phenolic ester photographic coupler dispersi

Details Sterically hindered phenolic ester photographic coupler dispersi Sterically hindered phenolic ester photographic coupler dispersi

1985-12-02

1988-03-01

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430551, 430512, 430634, 430931, G03C 140, G03C 184, G03C 732

Patent

active

047285990

ABSTRACT:
Photographic coupler dispersion addenda comprising phenolic esters of di-, tri- and tetra-carboxybenzene derivatives having bulky ortho 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 and cyan dye stability to light, heat and humidity.

REFERENCES:
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patent: 4268593 (1981-05-01), Leppard 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), Sugita et al.
patent: 4609618 (1986-09-01), Sasaki et al.

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