US 6,531,271 B1 · Color photographic element comprising a multifunctional dye-forming coupler

Abstract

A light-sensitive silver-halide color photographic element comprising at least two different chromogenic couplers including, in reactive association, a multifunctional coupler and a developer precursor that liberates a developing agent enabling cyan color from the multifunctional coupler on development, wherein the multifunctional coupler has the property that it is capable of forming a distinctly colored dye with an oxidized form of the developer 4-(N-ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine. In one embodiment, the multifunctional coupler has the property that it is capable of forming a distinctly colored magenta dye with an oxidized form of the developer 4-(N-ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine. By means of the present invention, light-sensitive color photothermographic elements can form yellow, magenta and cyan dye records of consistent density forming ability and consistent stability in all three color records.

Claims28

Dependent claims

A light-sensitive color photographic imaging element comprising a red-light-sensitive layer unit, a green-light-sensitive layer unit, and a blue-light-sensitive layer unit, the element further comprising at least two different chromogenic couplers, including a multifunctional coupler, and a developer precursor liberating a developing agent enabling cyan color from the multifunctional coupler on development, said multifunctional coupler and said developer precursor being in reactive association with at least one of said layer units, and wherein the multifunctional coupler has the property that it is capable of forming a distinctly colored dye with an oxidized form of the developer 4-(N-ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine.

A light sensitive color photographic imaging element comprising a red-light-sensitive layer unit, a green-light-sensitive layer unit and a blue-light-sensitive layer unit, the element further comprising at least two different couplers, including a multifunctional coupler, and a developer precursor liberating a developing agent enabling cyan color from the multifunctional coupler on development, said multifunctional coupler and said developer precursor being in reactive association with at least one of said layer units, wherein the multifunctional coupler has the property that it is capable of forming a distinctly colored magenta dye with an oxidized form of the developer 4-(N-ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine.

A light sensitive color photographic imaging element comprising a red-light-sensitive layer unit, a green-light-sensitive layer unit and a blue-light-sensitive layer unit, the element further comprising at least two different couplers, including a multifunctional coupler, and a developer precursor liberating a first developing agent enabling cyan color from the multifunctional coupler on development, said multifunctional coupler and said developer precursor being in reactive association with at least one of said layer units, wherein the multifunctional coupler has the property that it is capable of forming at least one other distinctly colored dye with an oxidized form of a second developing agent, different from the first developing agent, wherein both developing agents are selected from the class of developing agents represented by the following structure:

A—(CR1══CR2)n—NHY
wherein n is 2 such that (CR1══CR2)n represents a phenylene ring, which phenylene ring is substituted with two R1 groups and two R2 groups, all four of which R1 and R2 groups are independently selected;
and
A is OH or NR3R4;
Y is H or a group that cleaves before or during a coupling reaction to form YH;
and
R1, R2, R3 and R4, which groups can be the same or different, are individually H, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, halogen, cyano, alkoxy, substituted alkoxy, aryloxy, substituted aryloxy, amino, substituted amino, alkylcarbonamido, substituted alkylcarbonamido, arylcarbonamido, substituted arylcarbonamido, alkylsulfonamido, arylsulfonamido, substituted alkylsulfonamido, substituted arylsulfonamido, or sulfamyl or wherein at least two of the R1, R2, R3 and R4 groups together form a substituted or unsubstituted carbocyclic or heterocyclic ring structure.

4 more elements

Dependencies are inferred from the claim text.

Color photographic element comprising a multifunctional dye-forming coupler

Life of this patent

Color photographic element comprising a multifunctional dye-forming coupler

Life of this patent

Abstract

Claims28