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US4946770A Expired / Lapsed US ⏱️ 0.0 years remaining

Silver halide color photographic material

Assignee: Fujifilm Holdings Corp
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Filing: 1987-08-13
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Granted: 1990-08-07
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Expires: 2007-08-13
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Abstract

Abstract A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing a dispersion, said dispersion comprising oleophilic fine particles containing (a) at least one oil-soluble cyan coupler represented by formula (I) (described herein) capable of forming substantially non-diffusible cyan dye upon coupling with an oxidation product of an aromatic primary amine developing agent, and (b) a water-insoluble, organic solvent-soluble homopolymer or copolymer comprising not more than about 20% by weight of a repeating unit having an acid radical in the main chain or a side chain thereof, wherein the dispersion does not contain high-boiling point organic solvents. The photographic material provides color images excellent in preservability, particularly resistance to dark discoloration and light discoloration in good balance.

Inventors

  • 👤 Osamu Takahashi
  • 👤 Tsumoru Hirano
  • 👤 Seiki Sakanoue

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 09:44
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3882; G03C7/32; G03C7/34; G03C7/346

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 233 words
A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing a dispersion, said dispersion comprising oleophilic fine particles containing (a) at least one oil-soluble cyan coupler represented by formula (I) ##STR28## wherein R 1 represents a hydrogen atom or a halogen atom; R 2 represents a straight chain or branched chain alkyl group having from 2 to 4 carbon atoms; R 3 represents a ballast group; and X represents a hydrogen atom or a coupling releasable group, said coupler being capable of forming a substantially non-diffusible cyan dye upon coupling with an oxidation product of an aromatic primary amide developing agent, and (b) a water-insoluble, organic solvent-soluble vinyl homopolymer or copolymer comprising a repeating unit having a ##STR29## wherein G 1 represents a hydrogen atom and G 2 represents an unsubstituted alkyl group or a substituted or unsubstituted phenyl group, wherein said repeating unit when present in a copolymer is present in an amount of at least 60 mol %, and further comprising not more than about 20% by weight of a repeating unit having an acid radical in the main chain or a side chain thereof, wherein said homopolymer or copolymer has a number average molecular weight of not more than 150,000 and said dispersion does not contain in high-boiling point organic solvents having a boiling point of about 140° C. or higher.
Claim 2
Dependent Claim 233 words
A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing a dispersion, said dispersion comprising oleophilic fine particles containing (a) at least one oil-soluble cyan coupler represented by formula (I) ##STR28## wherein R 1 represents a hydrogen atom or a halogen atom; R 2 represents a straight chain or branched chain alkyl group having from 2 to 4 carbon atoms; R 3 represents a ballast group; and X represents a hydrogen atom or a coupling releasable group, said coupler being capable of forming a substantially non-diffusible cyan dye upon coupling with an oxidation product of an aromatic primary amide developing agent, and (b) a water-insoluble, organic solvent-soluble vinyl homopolymer or copolymer comprising a repeating unit having a ##STR29## wherein G 1 represents a hydrogen atom and G 2 represents an unsubstituted alkyl group or a substituted or unsubstituted phenyl group, wherein said repeating unit when present in a copolymer is present in an amount of at least 60 mol %, and further comprising not more than about 20% by weight of a repeating unit having an acid radical in the main chain or a side chain thereof, wherein said homopolymer or copolymer has a number average molecular weight of not more than 150,000 and said dispersion does not contain in high-boiling point organic solvents having a boiling point of about 140° C. or higher.
Claim 3
Dependent Claim 231 words
A silver halide color photographic material as in claim 1, wherein said cyan coupler is represented by formula (II) ##STR30## wherein X is as defined in claim 1; R 2 ' represents an alkyl group having from 2 to 4 carbon atoms; R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or au alkyl group; n represents 0 or an integer of from 1 to 3; Z represents an alkyl group having from 1 to 16 carbon atoms; m represents an integer of from 1 to 2; and the total number of carbon atoms in (Z) m , R 4 , and R 5 is at least 8; or said cyan coupler is represented by formula (III) ##STR31## wherein R 2 and X are as defined in claim 1; and R 6 represents an unsubstituted straight chain or branched chain aliphatic hydrocarbon group, or a straight chain or branched chain aliphatic hydrocarbon group substituted with at least one of a chlorine atom, an alkoxy group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group, a sulfonamido group, an acylamino group, an alkyloxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylcarbonyloxy group, an alkyloxycarbonyl group, a carboxyl group, and a hydroxyl group; or R 6 represents a divalent group capable of linking to form a dimer or higher polymer.
Claim 4
Dependent Claim 39 words
A silver halide color photographic material as in claim 1, wherein said dispersion is obtained by dissolving said coupler and said homopolymer or copolymer in a low-boiling point organic solvent and dispersing the resulting solution in a hydrophilic binder.
Claim 5
Dependent Claim 50 words
A silver halide color photographic material as in claim 1, wherein said dispersion is obtained by polymerizing a monomer or monomers constituting said homopolymer or copolymer by suspension polymerization, solution polymerization or bulk polymerization, and dispersing the resulting polymerization mixture in the presence of said coupler in a hydrophilic binder.
Claim 6
Dependent Claim 38 words
A silver halide color photographic material as in claim 1, wherein said homopolymer or copolymer comprises not more 5% by weight of a repeating unit having an acid radical in the main chain or a side chain thereof.
Claim 7
Dependent Claim 32 words
A silver halide color photographic material as in claim 1, wherein said homopolymer or copolymer has no repeating unit having an acid radical in the main chain or a side chain thereof.

References Cited (Backward Citations)

CA542135A Cited
US3619195A Cited
US4358533A Cited
US4448850A Cited
US4581324A Cited
EP0146337A2 Cited
US4686177A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-08-06 1994-02-05 1994-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-08-06 1998-02-05 1998-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-08-06 2002-02-05 2002-08-07 $7700.00 Window Closed / Lapsed

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