发明公开
- 专利标题: PHOTOGRAPHIC COUPLERS HAVING IMPROVED IMAGE DYE LIGHT STABILITY
- 专利标题(中): 与耐光性代尔提高图像照相成色剂
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申请号: EP99962405.9申请日: 1999-12-22
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公开(公告)号: EP1145078A1公开(公告)日: 2001-10-17
- 发明人: CLARKE, David , LEYSHON, Llewellyn , SMITH, Katie E.
- 申请人: EASTMAN KODAK COMPANY
- 申请人地址: 343 State Street Rochester,New York 14650 US
- 专利权人: EASTMAN KODAK COMPANY
- 当前专利权人: EASTMAN KODAK COMPANY
- 当前专利权人地址: 343 State Street Rochester,New York 14650 US
- 代理机构: Haile, Helen Cynthia
- 优先权: GB9828147 19981222
- 国际公布: WO0038013 20000629
- 主分类号: G03C7/34
- IPC分类号: G03C7/34 ; C07C311/08
摘要:
There is provided a photographic element comprising at least one silver halide emulsion layer having associated therewith a novel phenolic cyan dye-forming coupler of formula (I), wherein X is hydrogen or a group that can be split off by the reaction of the coupler with an oxidised colour developing agent, and one of Y and Z is the group represented by formula (II), wherein each R is independently an unsubstituted or substituted alkyl or aryl group or a 5-10 membered heterocyclic ring which contains one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted; R1 is hydrogen or an unsubstituted or substituted alkyl or aryl group, R2 is an unsubstituted or substituted alkyl or aryl group or a 5-10 membered heterocyclic ring which contains one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted R3 is hydrogen of an unsubstituted or substituted alkyl or aryl group, n is 1 or 2, and the other of Y and Z is an unsubstituted or substituted alkyl or aryl group or a 5-10 membered heterocyclic ring which contains one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted. The couplers for use in the element of the invention yield cyan images of good hue, with good stability to heat, humidity and light, whilst retaining the other properties desirable for good photographic performance.
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