US4983508A
Expired / Lapsed
US
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Method for manufacturing a light-sensitive silver halide emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1988-11-16
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Granted: 1991-01-08
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Expires: 2008-11-16
Abstract
Abstract A method of producing a silver halide photographic emulsion including the step of: reacting a water-soluble silver salt and at least one water-soluble halide salt containing chloride in aqueous solution in the presence of at least one compound represented by formulae (I) or (II): ##STR1## wherein A 1 , A 2 , A 3 and A 4 , which may be the same or different, each represents a nonmetallic atomic group necessary for forming a substituted or unsubstituted heterocyclic ring; B represents a divalent linking group; R 1 and R 2 , which may be the same or different, each represents an alkyl group; X represents an anion necessary for charge balance; m is 0 or 1; and n is 0 or 1; to form light-sensitive silver halide grains having a silver chloride content of at least 50 mol %, selected from octahedral grains, tetradecahedral grains and tablular grains, wherein at least 30% of the surface area of said light-sensitive silver halide grains is composed of (111) planes. The high chloride silver halide emulsions are suitable for rapid development processing with reduced fogging.
Inventors
- 👤 Shoji Ishiguro
- 👤 Kiyoshi Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C1/0051; G03C1/0053; G03C1/06; G03C1/07; G03C1/061; G03C1/035; G03C2001/03517; G03C2200/00; G03C2200/03; G03C2200/43; G03C2200/44
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A method for producing a silver halide photographic emulsion comprising the step of: reacting a water-soluble silver salt and at least one water-soluble halide salt containing chloride in aqueous solution in the presence of at least one compound represented by formulae (I) or (II): ##STR7## wherein A 1 , A 2 , A 3 and A 4 , which may be the same or different, each represents a nonmetallic atomic group necessary for forming a substituted or unsubstituted heterocyclic ring which may be condensed with a benzene ring, said heterocyclic ring being selected from the group consisting of pyridine, imidazole, thiazole, oxazole, pyrazine and pyrimidine; B represents a divalent linking group; R 1 and R 2 , which may be the same or different, each represents an alkyl group; X represents an anion necessary for charge balance; m is 0 or 1; and n is 0, 1, 2 or 3; to form light-sensitive silver halid grains having a silver chloride content of at least 50 mol %, selected from octahedral grains, tetradecahedral grains and tabular grains, wherein at least 30% of the surface area of said light-sensitive silver halide grains is composed of (111) planes.
Claim 2
Independent Claim
195 words
A method for producing a silver halide photographic emulsion comprising the step of: reacting a water-soluble silver salt and at least one water-soluble halide salt containing chloride in aqueous solution in the presence of at least one compound represented by formulae (I) or (II): ##STR7## wherein A 1 , A 2 , A 3 and A 4 , which may be the same or different, each represents a nonmetallic atomic group necessary for forming a substituted or unsubstituted heterocyclic ring which may be condensed with a benzene ring, said heterocyclic ring being selected from the group consisting of pyridine, imidazole, thiazole, oxazole, pyrazine and pyrimidine; B represents a divalent linking group; R 1 and R 2 , which may be the same or different, each represents an alkyl group; X represents an anion necessary for charge balance; m is 0 or 1; and n is 0, 1, 2 or 3; to form light-sensitive silver halid grains having a silver chloride content of at least 50 mol %, selected from octahedral grains, tetradecahedral grains and tabular grains, wherein at least 30% of the surface area of said light-sensitive silver halide grains is composed of (111) planes.
Claim 3
Dependent Claim
118 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein the substituted heterocyclic range formed from A 1 , A 2 , A 3 and A 4 is substituted with at least one substituent selected from the group consisting of an alkyl group, an aryl group, an aralkyl group, an alkenyl group, a halogen atom, an acyl group, an alkoxycarbonyl group, an aryloxcarbonyl group, a sulfo group, a carboxyl group, a hydroxyl group, an alkoxy group, an aryloxy group, an amido group, a sulfamoyl group, a carbamoyl group, a ureido group, an amino group, a sulfonyl group, a cyano group, a nitro group, a mercapto group, an alkylthio group and an arylthio group.
Claim 4
Dependent Claim
38 words
The method for producing a silver halide photographic emulsion as claimed in claim 2, wherein said heterocyclic ring formed by A 1 , A 2 , A 3 and A 4 is a substituted or unsubstituted pyridine ring.
Claim 5
Dependent Claim
59 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein said divalent linking group represented by B is selected from an alkylene group, an arylene group, an alkenylene group, --SO 2 --, --SO--, --O--, --S-- ##STR8## and a combination thereof, wherein R 3 represents an alkyl group, an aryl group or a hydrogen atom.
Claim 6
Dependent Claim
24 words
The method for producing a silver halide photographic emulsion as claimed in claim 4, wherein B represents an alkylene group or an alkenylene group.
Claim 7
Dependent Claim
116 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein R 1 and R 2 each represents an alkyl group containing 1 to 20 carbon atoms, unsubstituted or substituted with a substituent selected from the group consisting of an alkyl group, an aryl group, an aralkyl group, an alkenyl group, a halogen atom, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfo group, a carboxyl group, a hydroxyl group, an alkoxy group, an aryloxy group, an amido group, a sulfamoyl group, a carbamoyl group, a ureido group, an amino group, a sulfonyl group, a cyano group, a nitro group, a mercapto group, an alkylthio group and an arylthio group.
Claim 8
Dependent Claim
33 words
The method for producing a silver halide photographic emulsion as claimed in claim 6, wherein R 1 and R 2 each represents an alkyl group substituted with a substituted or unsubstituted aryl group.
Claim 9
Dependent Claim
43 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein said compound represented by formulae (I) or (II) is present in an amount of from 2×10 -5 to 3×10 -1 mol of silver halide contained in said emulsion.
Claim 10
Dependent Claim
43 words
The method for producing a silver halide photographic emulsion as claimed in claim 8, wherein said compound represented by formulae (I) or (II) is present in an amount of from 2×10 -4 to 1×10 -1 mol of silver halide contained in said emulsion.
Claim 11
Dependent Claim
63 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein said aqueous solution contains 0.05 to 5 mol/liter of chloride at the time of forming the nuclei of said silver halide grains, and during the growth of said silver halide grains the concentration of chloride is at most 5 mol/liter; said light-sensitive sil halide grains being tabular grains.
Claim 12
Dependent Claim
48 words
The method for producing a silver halide photographic emulsion as claimed in claim 10, wherein the concentration of chloride during the formation of said nuclei is 0.07 to 2 mol/liter, and during the growth of said silver halide grains the concentration of chloride is 0.1 to 2 mol/liter.
Claim 13
Dependent Claim
30 words
The method for producing a silver halide photographic emulsion as claimed in claim 11, wherein the concentration of chloride during the formation of said nuclei is 0.15 to 0.5 mol/liter.
Claim 14
Dependent Claim
65 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein said aqueous solution contains at most 0.5 mol/liter of chloride at the time of forming the nuclei of said silver halide grians, and during the growth of said silver halide grains the concentration of chloride is at most 5 mol/liter; said light-sensitive silver halide grains being octahedral or tetradecahedral grains.
Claim 15
Dependent Claim
49 words
The method for producing a silver halide photographic emulsion as claimed in claim 13, wherein the concentration of chloride during the formation of said nuclei is 0.02 to 0.2 mol/liter and the concentration of chloride during the growth of said silver halide grains is from 0.07 to 2.0 mol/liter.
Claim 16
Dependent Claim
30 words
The method for producing a silver halide photographic emulsion as claimed in claim 14, wherein the concentration of chloride during the formation of said nuclei is 0.05 to 0.1 mol/liter.
Claim 17
Dependent Claim
26 words
The method for producing a silver halide photographic emulsion as claimed in claim 1, wherein the pH of said aqueous solution is from 2 to 8.
Claim 18
Dependent Claim
31 words
The method for producing a silver halide photographic emulsion as claimed in claim 16, wherein said light-sensitive silver halide grains have a silver chloride content of at least 70 mol %.
Claim 19
Dependent Claim
31 words
The method for producing a silver halide photographic emulsion as claimed in claim 16, wherein said light-sensitive silver halide grains have a silver chloride content of at least 90 mol %.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |