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    • 8. 发明授权
    • Photographic element containing dispersions of high dye-yield couplers
having improved photographic activity
    • 包含具有改善的摄影活性的高染料收率成色剂的分散体的照相元件
    • US5830632A
    • 1998-11-03
    • US741886
    • 1996-10-31
    • Krishnan ChariDavid Thomas SouthbyDavid Hoke
    • Krishnan ChariDavid Thomas SouthbyDavid Hoke
    • G03C7/305G03C7/388G03C1/08G03C7/26G03C7/32
    • G03C7/388G03C7/30576Y10S430/136Y10S430/156
    • Photographic element are described comprising a support bearing a photographic silver halide emulsion layer having associated therewith a micro-precipitated dispersion of a high dye-yield coupler having the formula: COUP--(T).sub.m --L--DYE where COUP is the coupler moiety of the coupler capable of reacting at the coupling position with oxidized color developer to form a first dye, T is one or more timing groups with m=0, 1 or 2, L is a linking group selected from the group consisting of --OC(O)--, --OC(S)--, --SC(O)--, --SC(S)--, or --OC(.dbd.NSO.sub.2 R)--, where R is a substituted or unsubstituted alkyl or aryl group, and DYE is a second dye or precursor thereof comprising an electrically neutral chromophore. The invention also provides a photographic coupler dispersion, a photographic silver halide emulsion, and a process for forming an image in a photographic element in accordance with the invention. The photographic element, coupler dispersion, silver halide emulsion, and imaging process provide improved reactivity and photographic properties.
    • 描述的照相元件包括具有照相卤化银乳剂层的载体,其具有与其相连的具有下式的高染料收率成色剂的微沉淀分散体:COUP-(T)mL-DYE,其中COUP是成色剂的成色剂部分 能够在偶联位置与氧化的显色剂反应形成第一种染料,T是一个或多个m = 0,1或2的时基,L是选自-OC(O) - ,-OC(S) - , - SC(O) - , - SC(S) - 或-OC(= NSO 2 R) - ,其中R是取代或未取代的烷基或芳基,DYE是第二种染料或 其前体包含电中性发色团。 本发明还提供了照相成色剂分散体,照相卤化银乳剂,以及根据本发明在照相材料中形成图像的方法。 照相元件,成色剂分散体,卤化银乳剂和成像方法提供改善的反应性和照相性能。