发明授权
US06261755B1 Photographic elements containing blend of cyan dye-forming couplers 失效
含有青色染料成色剂的混合物的照相元件

Photographic elements containing blend of cyan dye-forming couplers
摘要:
The invention provides a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith: (A) a phenolic cyan dye-forming narrow bandwidth “NB coupler”; (B) a phenolic cyan dye-forming coupler of formula (II): wherein: R3 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; R4 is an unsubstituted or substituted alkyl group; R5 is hydrogen, halogen or 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; and Z is a hydrogen atom or a group which can be split off by the reaction of the coupler with an oxidized color-developing agent; and (C) a stabilizer of formula (III) wherein: each Y is an independently selected substituent and m is 0 to 4; and each T is an independently selected substituent and p is 0 to 4. Preferably the element has associated therewith one or more high-boiling solvents of formula (IV) wherein: R1 is an unsubstituted or substituted alkyl or aryl group; and G is an unsubstituted or substituted alkyl group.
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