发明授权
- 专利标题: Silver halide color photographic light-sensitive material containing novel magenta couplers
- 专利标题(中): 含有新品红色成色剂的卤化银彩色照相感光材料
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申请号: US409928申请日: 1989-09-20
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公开(公告)号: US4988614A公开(公告)日: 1991-01-29
- 发明人: Osamu Ishige , Hidetaka Ninomiya , Toyoaki Masukawa , Junichi Kohno
- 申请人: Osamu Ishige , Hidetaka Ninomiya , Toyoaki Masukawa , Junichi Kohno
- 申请人地址: JPX Tokyo
- 专利权人: Konica Corporation
- 当前专利权人: Konica Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX63-239667 19880927
- 主分类号: G03C7/305
- IPC分类号: G03C7/305 ; G03C7/34
摘要:
A silver halide photographic light-sensitive material containing a novel magenta dye-forming coupler. The coupler is represented by the following Formula I: ##STR1## wherein R.sub.1 is a hydrogen atom or a substituent; R.sub.2 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted heterocyclic group or a substituted or unsubstituted amino group; provided, R.sub.1 and R.sub.2 are allowed to bond together so as to complete a ring; Z is a hydrogen atom or a group capable of being split off upon coupling reaction with the oxidized product of a an aromatic primary amine developing agent; and EWG is an electron attractive group having a Hammet's .sigma. p value of more than 0.3. The photographic material has excellent color reproducibility and improved in color forming efficiency and graininess of images.
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