EP0372573A2
Expired / Lapsed
EP
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Silver halide photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1989-12-08
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Granted: —
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Expires: 2009-12-08
Abstract
Abstract A silver halide photographic material is disclosed, comprising a support having thereon an emulsion layer comprising a dispersion medium, silver halide grains, and a pendant type sensitizing dye, wherein said pendant type sensitizing dye is a compound comprising a sensitizing dye and an antifoggant, each of which may have substituent groups and wherein said sensitizing dye and antifoggant are organochemically bonded.
Inventors
- 👤 Mitsuo Saitou
- 👤 Toshinao Ukai
- 👤 Tadashi Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
A silver halide photographic material comprising a support having thereon an emulsion layer comprising a dispersion medium, silver halide grains, and a pendant type sensitizing dye, wherein said pendant type sensitizing dye is a compound comprising a sensitizing dye and an antifoggant, each of which may have substituent groups and wherein said sensitizing dye and antifoggant are organochemically bonded.
Claim 2
Dependent Claim
59 words
A silver halide photographic material comprising a support having thereon an emulsion layer comprising a dispersion medium, silver halide grains, and a pendant type sensitizing dye, wherein said pendant type sensitizing dye is a compound comprising a sensitizing dye and an antifoggant, each of which may have substituent groups and wherein said sensitizing dye and antifoggant are organochemically bonded.
Claim 3
Dependent Claim
27 words
The silver halide photographic materials as in claim 1, wherein said sensitizing dye and antifoggant are directly bonded via substituent groups or bonded via a linking group.
Claim 4
Dependent Claim
56 words
The silver halide photographic materials as in claim 2, wherein said linking group is a divalent linking group comprising not more than 20 carbon atoms and is selected from the group consisting of alkylene, arylene, alkenylene, -SO₂, -SO-, -O-, -S-, -(CO)- and -(NR)-, wherein R represents an alkyl group, an aryl group or a hydrogen atom.
Claim 5
Dependent Claim
68 words
The silver halide photographic materials as in claim 1, wherein said substituent groups are selected from the group consisting of hydroxyl groups, halogen atoms, lower alkyl groups and substituted alkyl groups, aryl groups and substituted aryl groups, lower alkoxy groups and substituted alkoxy groups, aryloxy groups, lower alkylthio groups, arylthio groups, methylenedioxy groups, cyano groups, amino groups and substituted amino groups, carboxyl groups, alkoxycarbonyl groups, and acyl groups.
Claim 6
Dependent Claim
52 words
The silver halide photographic materials as in claim 1, wherein said pendant type dye is a compound represented by formula (6) or formula (7): wherein 1/n is from 2/1 to 1/4, and m equals 1 or n. L and L² represent a divalent linking group having not more than 20 carbon atoms.
Claim 7
Dependent Claim
33 words
The silver halide photographic materials as in claim 1, wherein the sensitizing dyes from which said pendant type dyes are formed are selected from the group consisting of cyanine dyes and merocyanine dyes.
Claim 8
Dependent Claim
115 words
The silver halide photographic materials as in claim 1, wherein the antifoggants from which said pendant type dyes are formed are compounds represented by formula (4-1) or formula (4-2): Z-Y (4-1) Z-S-S-Y (4-2) wherein Z represents selected from the group consisting of an azole ring, a pyrimidine ring, a triazine ring, a pyridine ring or an azaindene ring and Y is selected from the group consisting of hydrogen atom, substituted or unsubstituted alkyl groups, alkenyl groups, aryl groups, heterocyclic residual groups, halogen atoms, mercapto groups, cyano groups, carboxyl groups, sulfo groups, hydroxyl groups, nitro groups, alkoxy groups, aryloxy groups, acyl groups, acylamino groups, substituted amino groups, alkylthio or arylthio groups, alkoxycarbonyl groups or aryloxycarbonyl groups.
Claim 9
Dependent Claim
30 words
The silver halide photographic materials as in claim 1, wherein the antifoggants from which said pendant type dyes are formed are azaindenes, azoles or azoles which have a mercapto group.
Claim 10
Dependent Claim
44 words
The silver halide photographic materials as in claim 1, wherein pKsp of the antifoggant from which said pendant type dye is formed is such that (pKsp of the antifoggant - pKsp of the substrage surface AgX) has a value of from -2 to 3.5.
Claim 11
Dependent Claim
47 words
The silver halide photographic materials as in claim 1, which comprises sensitizing dyes and antifoggants other than said pendant type dyes, and wherein the ratio, in terms of the numbers of molecules of said pendant type dye : sensitizing dye : antifoggant is from 1:0:0 to 1:7:7.
Claim 12
Dependent Claim
48 words
The silver halide photographic materials as in claim 1, wherein at least 60% of the total projected surface area of said silver halide grains is accounted for by silver halide grains in which at least 60% of said grain surface has a Cl-content of 40 mol% or more.
Claim 13
Dependent Claim
41 words
The silver halide photographic materials as in claim 1, wherein at least 70% of the total projected surface area of said silver halide grains is accounted for by tabular silver halide grains which have an aspect ratio of at least 2.
Claim 14
Dependent Claim
34 words
The silver halide photographic materials as in claim 1, wherein said antifoggant is a compound containing a saturated or unsaturated 5- to 7-membered ring containing at least one nitrogen atom as a hetero atom.
Claim 15
Dependent Claim
66 words
The silver halide photographic materials as in claim 1, wherein said antifoggant is a compound containing a saturated or unsaturated 5- to 7-membered ring containing at least one nitrogen atom as a hetero atom, and a compound represented by formulae R-SH, R-S-R′, R-SeH, R-Se-R′, R-TeH or R-Te-R′, wherein R and R′ each represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group.
Claim 16
Dependent Claim
56 words
The silver halide photographic materials as in claim 1, wherein said pendant type sensitizing dye has a structure having said antifoggants at both ends of the dye molecule, and is a separated-function type dye in which the dye molecule is coercively adsorbed on the silver halide grains by adsorbing said antifoggants on the silver halide grains.
References Cited (Backward Citations)
No citation records indexed.
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