申请人:Eastman Kodak Company
公开号:US06010837A1
公开(公告)日:2000-01-04
The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith an image dye-forming coupler of formula (I): ##STR1## wherein X is H or a coupling-off group, R is H; or R, R.sub.1 and R.sub.2 are the same or different and are coupler-modifying functional groups (with the provisos that (a) the moiety N(R.sub.1)COR.sub.2 may not be a carbamate, ureido or imido and (b) R.sub.1 and R.sub.2 may not both be phenyl or substituted phenyl); or R.sub.1 and R.sub.2 taken together with the nitrogen atom and the carbonyl group form a 5-10 membered heterocyclic ring which may contain one or more further heteroatoms selected from N, O and S, said heterocyclic ring being unsubstituted or substituted with one or more coupler-modifying functional groups, with the proviso that the ring is not a cyclic carbamate, ureido or imido; and wherein the coupler forms a dye with a peak absorption less than 565 nm.
本发明提供了一种包含银卤化物乳剂层的摄影元素,其具有与之相关联的公式(I)的图像染料形成偶联剂:##STR1## 其中X为H或偶联脱离基,R为H;或者R、R.sub.1和R.sub.2相同或不同,且为偶联修饰官能团(但须满足(a)N(R.sub.1)COR.sub.2基团不得为氨基甲酸酯、脲或亚酰基,(b)R.sub.1和R.sub.2不得都为苯基或取代苯基);或者R.sub.1和R.sub.2与氮原子和羰基团一起形成一个5-10成员杂环环,该杂环可能包含一个或多个进一步选自N、O和S的杂原子,所述杂环未取代或取代有一个或多个偶联修饰官能团,但须满足该环不是环状氨基甲酸酯、脲或亚酰基;并且该偶联剂形成的染料具有峰吸收小于565nm。