Patent ID: 6171771
Filing Date: 2001-01-09
Classification: G03C,Y10S

Abstract:
A photographic element comprising a support bearing one or more silver halide emulsions and one or more DIR couplers of structure IV: ##STR14##wherein:Z is a moiety which can react with oxidized developer to release a coupling-off group;R.sub.1 is a hydrogen atom or a substituent selected from the group consisting of halogen atom, alkyl, aryl, alkoxy, alkylthio, arylthio, amino, alkylamino, arylamino, carbonamido, carbamoyl, alkoxycarbonyl, aryloxycarbonyl, aryloxy, arylcarbonyl, alkylcarbonyl, sulphonyl and sulphonamido groups;each of the R.sub.3 and R.sub.4 is a hydrogen atom, a halogen atom, or a substituent selected from the group consisting of alkyl, aryl, alkoxy, alkylthio, arylthio, amino, alkylamino, arylamino, carbonamido, carbamoyl, alkoxycarbonyl, aryloxycarbonyl, aryloxy, arylcarbonyl, alkylcarbonyl, sulphonyl and sulphonamido groups, with the proviso that the total number of carbon atoms in groups R.sub.1, R.sub.3 and R.sub.4 taken together is at least 2.