Color developing agent, silver halide photographic light-sensiti

Details Color developing agent, silver halide photographic light-sensiti Color developing agent, silver halide photographic light-sensiti

1996-02-21

1997-09-16

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430351, 430440, 430441, 430264, G03C 500, G03C 7407

Patent

active

056679459

ABSTRACT:
There is disclosed a light-sensitive material comprising, in a hydrophilic colloid provided on a base, a color-developing agent represented by formula (I): ##STR1## wherein R.sup.1 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; X.sup.1, X.sup.3, and X.sup.5 each represent a hydrogen atom, a nitro group, a cyano group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a trifluoromethyl group, or a heterocyclic group; and X.sup.2 and X.sup.4 each represent a hydrogen atom, a nitro group, a cyano group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a trifluoromethyl group, a halogen atom, an acyloxy group, an acylthio group, or a heterocyclic group; with the proviso that the sum of the Hammett .sigma.p values of X.sup.1, X.sup.3, and X.sup.5 and the Hammett .sigma.m values of X.sup.2 and X.sup.4 is 1.50 or more but 3.80 or below. There is also disclosed a novel color-developing agent that can be built in. By using the color-developing agent, the light-sensitive material can attain a rapid and simple formation of an image.

REFERENCES:
patent: 2424256 (1947-07-01), Schmidt
patent: 3342597 (1967-09-01), Harnish et al.
patent: 3719492 (1973-03-01), Barr et al.
patent: 4060418 (1977-11-01), Waxman et al.
patent: 5415981 (1995-05-01), Clarke et al.

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