Photographic silver halide elements containing solid particle di

Details Photographic silver halide elements containing solid particle di Photographic silver halide elements containing solid particle di

1989-06-27

1990-08-14

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, 430512, 430517, 514212, G03C 134

Patent

active

049487183

ABSTRACT:
Solid particle dispersions of dyes according to the formula: ##STR1## are useful as filter dyes in photographic elements. In this formula, R.sub.1 and R.sub.2 are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring.
R.sub.3 and R.sub.4 each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, CO.sub.2 H, or NHSO.sub.2 R.sub.6. R.sub.5 is H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, carboxylate, or substituted or unsubstituted acyl, R.sub.6 and R.sub.7 are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, and n is 1 or 2. R.sub.8 is either substituted or unsubstituted alkyl, or is part of a double bond between the ring carbon atoms to which R.sub.1 and R.sub.2 are attached. At least one of the aryl rings of the dye molecule must have at least one substituent that is CO.sub.2 H or NHSO.sub.2 R.sub.6.

REFERENCES:
patent: 2527583 (1950-10-01), Silberstein et al.
patent: 3282699 (1966-11-01), Jones et al.
patent: 4092168 (1978-05-01), Lemahieu et al.
patent: 4110115 (1978-08-01), Sugiyama et al.
patent: 4294916 (1981-10-01), Postle et al.
patent: 4294917 (1981-10-01), Postle et al.
patent: 4542091 (1985-09-01), Sasaki et al.

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