Dye forming couplers and silver halide color photosensitive mate

Details Dye forming couplers and silver halide color photosensitive mate Dye forming couplers and silver halide color photosensitive mate

1993-02-05

1994-07-05

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430384, 430385, G03C 738

Patent

active

053266811

ABSTRACT:
A silver halide color photosensitive material which forms a cyan dye that has superior heat resistance and that will not readily fade in a reducing atmosphere. The silver halide color photosensitive material contains in at least one layer on a support at least one coupler represented by formula (I): ##STR1##
wherein R.sup.1 represents hydrogen atom or a substituent; R.sup.2 represents a substituent; X represents hydrogen atom or a group releasable on a coupling reaction with an oxidation product of a color developing agent; Z.sup.1 represents a nonmetallic atom group necessary for forming a nitrogen-containing, six-membered, heterocyclic ring which has at least one dissociative group: Z.sup.1 cannot be --C(.dbd.O)--N(R)-- C(.dbd.O)--NH--; and R represents a substituent.
Also disclosed is a novel dye forming coupler which exhibits a high coupling activity and which gives a dye having a large molar extinction coefficient and superior stability, the coupler being represented by the following formula (XX) or (XXI). Also disclosed is a silver halide color photosensitive material which contains at least one of the dye forming couplers of formulae (XX) and (XXI) and which provides sharp dye images with high fastness properties. ##STR2## wherein EWG represents an electron withdrawing group having a Hammett's .sigma..sub.p value of not less than 0.3; R.sub.1 and R.sub.2 each represent a substituent; and X represents hydrogen atom or a group releasable on a coupling reaction with an oxidation product of an aromatic primary amine developing agent.

REFERENCES:
patent: 4950585 (1988-08-01), Tachibana et al.
patent: 5187057 (1993-02-01), Ikosu et al
Patent Abstracts of Japan, vol. 16, No. 540 (P-1450), Nov. 10, 1992.

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