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EP0459331A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Silver halide color photographic light-sensitive material

Assignee: Konica Minolta Inc
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Filing: 1991-05-25
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Granted: —
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Expires: 2011-05-25
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Abstract

Abstract A silver halide color photographic material sutable for making a color proof in photomechanical process is disclosed. The light-sensitive material comprises a silver halide emulsion layer containing a yellow coupler and a magneta coupler represented by Formula M-I and the silver halide emulsion layer or a layer adjecent to the emulsion layer contains a compound represented by Formula I: wherein Z is a group of atoms necessary forming a nitrogen-containing heterocyclic ring ; X is a hydrogen atom or a substituent capable of being split off upon coupling reaction; and R is a hydrogen atom or a substituent: wherein R¹ and R² each a hydrogen atom, an alkyl group, an alkoxy group, an alkylthio group or an alkylamido group, the alkyl group, alkoxy group, alkylthio group and alkylamido group each have 1 to 8 carbon atoms; and R³ is a hydrogen atom or an alkyl group having 1 to 11 carbon atoms.

Inventors

  • 👤 Keiichi Konica Corporation Hoshino
  • 👤 Susumu Konica Corporation Ohkawachi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 16:38
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3003

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 178 words
A silver halide color photographic material comprising a support having thereon a silver halide emulsion layer containing a yellow coupler and a magneta coupler represented by the following Formula M-I and said silver halide emulsion layer or a layer adjacent to said emulsion layer contains a compound represented by the following Formula I: wherein Z is a group of atoms necessary forming a nitrogen-containing heterocyclic ring ; X is a hydrogen atom or a substituent capable of being split off upon reaction with the oxidation product of a color developing agent; and R is a hydrogen atom or a substituent: wherein R¹ and R² each a hydrogen atom, or an alkyl group, an alkoxy group, an alkylthio group or an alkylamido group, said alkyl group, alkoxy group, alkylthio group and alkylamido group each have 1 to 8 carbon atoms; and R³ is a hydrogen atom or a alkyl group having 1 to 11 carbon atoms, provided that the number of carbon atoms contained in said groups represented by R¹, R² and R³ is 8 to 22 in total.
Claim 2
Dependent Claim 40 words
The material of claim 1, wherein said magenta coupler is a coupler represented by the following Formula M-II or Formula M-III; wherein R₁, R₂, and R₃, and X are the same as R and X defined in Formula M-1, respectively.
Claim 3
Dependent Claim 48 words
The material of claim 1, wherein a group represented by said R of Formula M-I satisfies the following requisits; (1) the atom directly bonding with the heterocyclic ring is a carbon atom, and (2) the bonds between said carbon atom and the atoms adjacent thereto are single bonds.
Claim 4
Dependent Claim 92 words
The material of claim 1, wherein said yellow coupler is a compound represented by the following Formula Y-1: wherein R₁ is a halogen atom or an alkoxy group; R₂ is a hydrogen atom, a halogen atom an acylamino group, an alkoxycarbonyl group, an alkylsulfamoyl group, an arylsulfamoyl group, an arylsulfonamido group, an alkylureido group, an arylureido group, a succinimido group, an alkoxy group or an aryloxy group; and Z₂ is a hydrogen atom or a substituent capable of being split off upon reaction with the oxidation product of a color developing agent.
Claim 5
Dependent Claim 25 words
The material of claim 1, wherein said yellow coupler has a pKa value at most 3 lowere than the pKa value of said magenta coupler.
Claim 6
Dependent Claim 30 words
The material of claim 1, wherein said silver halide emulsion layer cotains said yellow coupler in a ratio of 0.02 mols to 0.5 mols per mol of said magenta coupler.
Claim 7
Dependent Claim 32 words
The material of claim 1, wherein said silver halide emulsion layer or a layer adjacent thereto contains said compound represented by Formula I in an amount of 1×10⁻⁸ mols/m² to 1×10⁻² mols/m².
Claim 8
Dependent Claim 32 words
The material of claim 7, wherein said silver halide emulsion layer or a layer adjecent thereto contains said compound represented by Formula I in an amount of 1×10⁻⁷ mols/m² to 1×10⁻³ mols/m².
Claim 9
Dependent Claim 31 words
The material of claim 1, wherein the number of carbon atoms contained in the groups represented by R¹, R² and R³ in said Formula I is 8 to 17 in total.
Claim 10
Dependent Claim 239 words
A silver halide color photographic material comprising a support having thereon a silver halide emulsion layer containing a yellow coupler and a magneta coupler represented by Formula M-II or Formula M-III and said silver halide emulsion layer or a layer adjecent to said emulsion layer contains a compound represented by Formula I, provided that said yellow coupler has a pKa value at most 3 lower than the pKa value of said magenta coupler and the ratio of said yellow couper to said magenta coupler is 0.02 mols to 0.5 mols per mol of said magenta coupler: wherein R₁, R₂ and R₃ are independently a substituent satisfying the requisites of (1) the atom directly bonding with the heterocyclic ring is a carbon atom, and (2) the bonds between said carbon atoms and the atoms dajacent thereto are single bonds; X is a hydrogen atom or a substituent capable of being split off upon reaction with the oxidation product of a color developing agent: wherein R¹ and R² each a hydrogen atom, an alkyl group, an alkoxy group, an alkylthio group or an alkylamido group, said alkyl group, alkoxy group, alkylthio group and slkylamido group each have 1 to 6 carbon atoms; and R³ is a hydrogen atom or a alkyl group having 1 to 11 carbon atoms, provided that the number of carbon atoms contained in said groups represented by R¹, R² and R³ is 8 to 17 in total.

References Cited (Backward Citations)

GB1474994A Cited
JPH02124568A Cited
EP0355818A2 Cited

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