发明授权
- 专利标题: Photographic element containing azole couplers
- 专利标题(中): 含有唑偶合剂的摄影元件
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申请号: US10122284申请日: 2002-04-12
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公开(公告)号: US06521397B1公开(公告)日: 2003-02-18
- 发明人: Mbiya Kapiamba , Donald R. Diehl , James L. Edwards , David G. Lincoln , Gary M. Russo
- 申请人: Mbiya Kapiamba , Donald R. Diehl , James L. Edwards , David G. Lincoln , Gary M. Russo
- 主分类号: G03C146
- IPC分类号: G03C146
摘要:
Disclosed is a photographic element comprising a support bearing a light sensitive silver halide emulsion layer having associated therewith a dye forming coupler having a formula I, wherein: Ballast is a group containing at least 6 aliphatic carbon atoms, V represents a chain of three or four atoms, which may be substituted, selected from C, N, O and S sufficient to form an aromatic ring fused to the azole ring and n is 0 or 1, provided that if n is 0, Y and Ballast are directly attached to the 5-membered azole ring, W is an electron withdrawing group selected from the group consisting of —CN, —CONR1R2, —CO2R1, —NO2, and —SO2R1 where R1 and R2 are H or substituents; X is H or a coupling-off group; Y is H or a substituent; Z is an atom or group selected from >N—R, —O—, and —S—.
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