Color-forming aminopyrimidine couplers and silver halide color p

Details Color-forming aminopyrimidine couplers and silver halide color p Color-forming aminopyrimidine couplers and silver halide color p

1990-05-23

1991-05-21

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430376, 430387, 430558, G03C 738

Patent

active

050174665

ABSTRACT:
A color-forming aminopyrimidine coupler represented by formula (I): ##STR1## where R.sub.1, R.sub.2, and R.sub.3 independently represent a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic-oxy group, an alkylthio group, an arylthio group, a heterocyclic-thio group, a substituted or unsubstitued amino group, a heterocyclic group bonding to the pyrimidine ring via a nitrogen atom thereof, an alkyl group or an aryl group; provided that at least one of R.sub.1, R.sub.2 and R.sub.3 is an unsubstituted or substituted amino group, and that when any one of R.sub.1, R.sub.2 or R.sub.3 contains a sulfonic acid group or a salt thereof, R.sub.1 , R.sub.2 or R.sub.3 contains at least one linear or branched alkyl group and that the total carbon atoms in the alkyl group(s) are to be more than 8; and R.sub.4 represents a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic-oxy group, an alkylthio group, an arylthio group, a heterocyclic-thio group, a substituted or unsubstituted amino group, or a heterocyclic group bonding to the pyrimidine ring via a nitrogen atom thereof.
At least one coupler of formula (I) is incorporated into the photographic constitutive layer of a color silver halide photographic material, which gives a color image with high heat-fastness.

REFERENCES:
patent: 2718466 (1955-09-01), Wolfson
patent: 3635721 (1972-01-01), Sato et al.
patent: 4921783 (1990-05-01), Nakayama et al.

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