发明授权
US6043011A Silver halide color photographic element having improved bleachability
失效
具有改善的漂白性的卤化银彩色照相元件
- 专利标题: Silver halide color photographic element having improved bleachability
- 专利标题(中): 具有改善的漂白性的卤化银彩色照相元件
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申请号: US76155申请日: 1998-05-11
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公开(公告)号: US6043011A公开(公告)日: 2000-03-28
- 发明人: Isabella Cogliolo , Paolo Beretta , Ivano Delprato , Sergio Massirio
- 申请人: Isabella Cogliolo , Paolo Beretta , Ivano Delprato , Sergio Massirio
- 申请人地址: PTX
- 专利权人: Tulalip Consultoria Comercial Sociedade Unipessaol S.A.
- 当前专利权人: Tulalip Consultoria Comercial Sociedade Unipessaol S.A.
- 当前专利权人地址: PTX
- 优先权: EPX97107926 19970515
- 主分类号: G03C7/30
- IPC分类号: G03C7/30 ; G03C7/305 ; G03C7/42 ; G03C1/43 ; G03C7/32 ; G03C7/34
摘要:
A multilayer silver halide color photographic element comprises a support having coated thereon a silver antihalation layer, an interlayer, at least two red-sensitive silver halide emulsion layers, at least two green-sensitive silver halide emulsion layers a yellow filter layer, and at least two blue-sensitive silver halide emulsion layers, wherein a silver halide emulsion layer or a nonsensitive layer adjacent thereto comprises a bleach accelerator releasing coupler of formulaA-(TIME).sub.n -S-X-Rwherein A represents a coupler residue releasing from (TIME).sub.n -S-X-R upon reaction with the oxidation product of a color developing agent; TIME represents a timing group releasing S-X-R with delay under developing conditions; n represents 0 or 1; X represents a divalent linking groups consisting of an alkylene group containing 1 to 8 carbon atoms; and R represents a group selected in the group consisting of a), b) and c): ##STR1## wherein R.sub.1 represents hydrogen or a monovalent chemical group, n represents 0 or 1, Z represents the atoms necessary to complete a 5- or 6-membered ring or a fused ring, and R.sub.2 and R.sub.4, equal or different, each represents hydrogen, an alkyl group, an aryl group, --SO.sub.2 R.sub.4 or --COR.sub.4, wherein R.sub.4 represents an alkyl group or an aryl group. The invention provides reduction in residual silver levels after processing, without deleteriously affecting sensitometric properties and color reproduction performance of the photographic element.
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