申请人:Eastman Kodak Company
公开号:US05677118A1
公开(公告)日:1997-10-14
The invention provides a photographic element comprising a support bearing at least one silver halide emulsion layer having associated therewith a 5-pyrazolone photographic coupler represented by the formula (I): ##STR1## wherein a) substituents G.sup.1, G.sup.2 and G.sup.3 are individually selected from the group consisting of hydrogen, halogen, alkyl, alkoxy, aryloxy, acylamino, alkylthio, arylthio, sulfonamido, sulfamoyl, sulfamido, carbamoyl, diacylamino, alkoxycarbonyl, aryloxycarbonyl, alkoxysulfonyl, aryloxysulfonyl, alkylsulfonyl, alkylsulfoxyl, arylsulfoxyl, arylsulfonyl, alkoxycarbonylamino, aryloxycarbonylamino, alkylureido, arylureido, acyloxy, nitro, cyano, and carboxy groups; b) a and b are individually integers from 0 to 5, provided that the sum of the sigma values for G.sup.1 and G.sup.2 is at least 1.3; and c is an integer from 0 to 4; c) Z is a group of the formula (II): ##STR2## wherein R.sup.1 is selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, acyl, and heterocyclic groups; R.sup.2 is hydrogen; R.sup.3 is selected from the group consisting of hydrogen and alkyl groups having from 1 to 16 carbon atom; and each R.sup.4 is an identically substituted methyl or silyl group.
本发明提供了一种摄影元素,其包括支撑物,其上具有至少一层银卤化物乳剂层,其中与之关联的5-吡唑酮摄影偶合剂由式(I)表示:##STR1## 其中a)取代基G1,G2和G3分别选自氢,卤素,烷基,烷氧基,芳氧基,酰胺基,烷硫基,芳基硫基,磺酰氨基,磺酰胺基,磺酰胺基,氨基甲酰基,二酰胺基,烷氧羰基,芳氧羰基,烷氧磺酰基,芳氧磺酰基,烷基磺酰基,烷基亚砜基,芳基亚砜氧基,芳基磺酰基,烷氧羰基氨基,芳氧羰基氨基,烷基脲基,芳基脲基,酰氧基,硝基,氰基和羧基基团的群组中选择;b)a和b分别是0到5的整数,但要求G1和G2的sigma值之和至少为1.3;c是0到4的整数;c)Z是式(II)的基团:##STR2## 其中R1选自氢,烷基,烯基,芳基,酰基和杂环基团的群组;R2是氢;R3选自具有1到16个碳原子的氢和烷基基团;每个R4是相同的取代甲基或硅基团。