Silver halide photographic elements containing 2-equivalent 5-pyrazolone magenta couplers
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United States of America Patent
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Sep 2, 1997
Grant Date -
N/A
app pub date -
Feb 22, 1996
filing date -
Mar 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Silver halide photographic element comprising a support and at least one silver halide emulsion layer having therein a 2-equivalent 5-pyrazolone magenta coupler represented by the formula: ##STR1## wherein a represents an integer from 0 to 3, b represents an integer from 0 to 2, R.sub.1 and R.sub.2 are each individually hydrogen, alkyl, alkoxy, halogen, aryl, aryloxy, acylamino, sulfonamido, sulfamoyl, carbamoyl, arylsulfonyl, aryloxycarbonyl, alkoxycarbonyl, alkoxysulfonyl, aryloxysulfonyl, alkylureido, arylureido, nitro, cyano, hydroxyl or carboxy group, R.sub.3 is halogen atom, alkyl or aryl group, X is a direct link or a linking group, Ball is a ballasting group which renders a group to which is attached non-diffusible in photographic coatings, and the sum of the sigma values of R.sub.1, R.sub.3 and X-Ball is less than 1.3.
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