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US4431731A
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Internal latent image silver halide emulsions
Assignee: Fujifilm Holdings Corp
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Filing: 1982-02-17
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Granted: 1984-02-14
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Expires: 2002-02-17
Abstract
Abstract An internal latent image silver halide emulsion is disclosed comprising core/shell silver halide particles having a chemically sensitized surface which are composed of a core of silver halide doped with metal ions and/or subjected to chemical sensitization and a shell which covers said core as far as to do at least the sensitive sites of said core and a binder, wherein said silver halide emulsions contain a polymer containing a repeating unit represented by the following general formula (I) in an amount of 2 mg to 1000 mg per mole of silver as the weight of said repeating units in said polymer: ##STR1## wherein R 1 represents a hydrogen atom or an alkyl group and Q represents a group selected from the group consisting of the following (1)-(4): ##STR2## wherein q represents an integer of 2 to 4, ##STR3## wherein R 2 and R 3 each represents a hydrogen atom or an alkyl group, ##STR4## wherein Z 1 represents an atomic group necessary to complete a lactam ring, an oxazolidone ring or a pyridone ring, and A represents a single bond, ##STR5## wherein B represents --O-- or ##STR6## wherein R 4 represents a hydrogen atom or an alkyl group, and l represents an integer of 1 to 6, and ##STR7## wherein A has the same meaning as in (3), D represents a single bond, --O-- or ##STR8## and m and n each represents an integer of 1 to 6 which satisfies the relationship m+n=4 to 7, wherein R 5 represents a hydrogen atom, an alkyl group or ##STR9## wherein R 6 represents an alkyl group. The internal latent image silver halide emulsions have good stability with the passage of time.
Inventors
- 👤 Tadao Sugimoto
- 👤 Ichizo Toya
- 👤 Shigeharu Urabe
- 👤 Shinji Sakaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:26
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48538; G03C1/48569; G03C1/48576; G03C1/04; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
326 words
In an internal latent image silver halide emulsion comprising core/shell silver halide particles having a chemically sensitized surface and which are composed of a core of silver halide doped with metal ions and/or subjected to chemical sensitization and a shell which covers at least the sensitive sites of said core and a binder, the improvement wherein said silver halide emulsion contains a homopolymer containing a repeating unit represented by the formula (I) or a copolymer selected from the group consisting of copolymers obtained by copolymerization of only monomers of the formula (I) or copolymers obtained by copolymerization of a monomer of the formula (I) and an addition-polymerizable ethylenically unsaturated compound, said homopolymer or copolymer being present in a stabilizing amount of 2 mg to 1,000 mg per mole of silver in the case of said homopolymer or being present in a stabilizing amount providing 2 mg to 1,000 mg of the repeating unit of the formula (I) per mole of silver in the case of said copolymer, ##STR26## wherein R 1 represents a hydrogen atom and Q represents a group selected from the gorup consisting of the following (1)-(4): ##STR27## wherein q represents an integer of 2 to 4, ##STR28## wherein R 2 and R 3 each represents a hydrogen atom or an alkyl group, ##STR29## wherein Z 1 represents an atomic group necessary to complete a lactam ring, an oxazolidone ring or a pyridone ring, and A represents a single bond, ##STR30## wherein B represents --O-- or ##STR31## wherein R 4 represents a hydrogen atom or an alkyl group, and l represents an integer of 1 to 6, and ##STR32## wherein A has the same meaning as in (3), D represents a single bond, --O-- or ##STR33## and m and n each represents an integer of 1 to 6 which satisfies the relationship m+n=4 to 7, wherein R 5 represents a hydrogen atom, an alkyl group or ##STR34## wherein R 6 represents an alkyl group.
Claim 2
Dependent Claim
326 words
In an internal latent image silver halide emulsion comprising core/shell silver halide particles having a chemically sensitized surface and which are composed of a core of silver halide doped with metal ions and/or subjected to chemical sensitization and a shell which covers at least the sensitive sites of said core and a binder, the improvement wherein said silver halide emulsion contains a homopolymer containing a repeating unit represented by the formula (I) or a copolymer selected from the group consisting of copolymers obtained by copolymerization of only monomers of the formula (I) or copolymers obtained by copolymerization of a monomer of the formula (I) and an addition-polymerizable ethylenically unsaturated compound, said homopolymer or copolymer being present in a stabilizing amount of 2 mg to 1,000 mg per mole of silver in the case of said homopolymer or being present in a stabilizing amount providing 2 mg to 1,000 mg of the repeating unit of the formula (I) per mole of silver in the case of said copolymer, ##STR26## wherein R 1 represents a hydrogen atom and Q represents a group selected from the gorup consisting of the following (1)-(4): ##STR27## wherein q represents an integer of 2 to 4, ##STR28## wherein R 2 and R 3 each represents a hydrogen atom or an alkyl group, ##STR29## wherein Z 1 represents an atomic group necessary to complete a lactam ring, an oxazolidone ring or a pyridone ring, and A represents a single bond, ##STR30## wherein B represents --O-- or ##STR31## wherein R 4 represents a hydrogen atom or an alkyl group, and l represents an integer of 1 to 6, and ##STR32## wherein A has the same meaning as in (3), D represents a single bond, --O-- or ##STR33## and m and n each represents an integer of 1 to 6 which satisfies the relationship m+n=4 to 7, wherein R 5 represents a hydrogen atom, an alkyl group or ##STR34## wherein R 6 represents an alkyl group.
Claim 3
Dependent Claim
74 words
The internal latent image silver halide emulsion as in claim 1, wherein Q represents a group selected from the group consisting of the following (i)-(iii): ##STR35## wherein R 2 represents a methyl group or an ethyl group, and R 3 represents a hydrogen atom, a methyl group or an ethyl group ##STR36## wherein A represents a single bond or ##STR37## and Z 1 forms a 5-membered or 6-membered lactam ring or an oxazolidone ring.
Claim 4
Dependent Claim
22 words
The internal latent image silver halide emulsion as in claim 2, wherein Q represents ##STR38## a pyrrolidone group or a oxazolidone group.
Claim 5
Dependent Claim
17 words
The internal latent image silver halide emulsion as in claim 3, wherein Q represents a pyrrolidone group.
Claim 6
Dependent Claim
18 words
Internal latent image silver halide emulsion as in claim 1 wherein said silver halide emulsion contains said homopolymer.
Claim 7
Dependent Claim
202 words
The internal latent image silver halide emulsion as in claim 1, wherein said polymer is a copolymer which is obtained by copolymerization of the following general formula (IA): ##STR39## wherein R 1 represents a hydrogen atom or an alkyl group and Q represents a group selected from the group consisting of the following (1)-(4): ##STR40## wherein q represents an integer of 2 to 4, ##STR41## wherein R 2 and R 3 each represents a hydrogen atom or an alkyl group, ##STR42## wherein Z 1 represents an atomic group necessary to complete a lactam ring, an oxazolidone ring or a pyridone ring, and A represents a single bond, ##STR43## wherein B represents --O-- or ##STR44## wherein R 4 represents a hydrogen atom or an alkyl group, and l represents an integer of 1 to 6, and ##STR45## wherein A has the same meaning as in (3), D represents a single bond, --O-- or ##STR46## and m and n each represents an integer of 1 to 6 which satisfies the relationship m+n=4 to 7, wherein R 5 represents a hydrogen atom, an alkyl group or ##STR47## wherein R 6 represents an alkyl group, and one or more ethylenically unsaturated compounds capable of addition polymerization.
Claim 8
Dependent Claim
25 words
The internal latent image silver halide emulsion as in claim 1, wherein said homopolymer or copolymer has a molecular weight of about 2000 or more.
Claim 9
Dependent Claim
176 words
The internal latent image silver halide emulsion as in claim 1, wherein said homopolymer or copolymer is selected from a group consisting of poly-(N-vinylpyrrolidone), poly-(N-vinyloxazolidone), poly-(N-vinylsuccinimide), poly-(N-vinylglutarimide), poly-(N-vinylpiperidone), poly-(N-vinyl-ε-caprolactam), poly-(N-methyl-N-vinylacetamide), poly-(N-ethyl-N-vinylacetamide), poly-(N-vinylacetamide), vinyl alcohol-N-vinyl acetamide copolymer (molar ratio: 30:70), vinyl alcohol-N-vinylpyrrolidone copolymer (molar ratio: 20:80), vinyl alcohol-N-vinylpyrrolidone copolymer (molar ratio: 30:70), N-vinylpyrrolidone-vinyl acetate copolymer (molar ratio: 70:30), N-vinylpyrrolidone-2-hydroxyethylacrylate copolymer (molar ratio: 70:30), N-vinylpyrrolidone-acrylic acid copolymer (molar ratio: 90:10), N-vinylpyrrolidone-N-vinyl-3,5-dimethyltriazole copolymer (molar ratio: 50:50), N-vinylpiperidone-2-methoxyethyl acrylate copolymer (molar ratio: 70:30), N-vinylpiperidone-methyl vinyl ether copolymer (molar ratio: 90:10), N-vinyloxazolidone-vinyl alcohol copolymer (molar ratio: 65:35), N-vinyloxazolidone-acrylic acid copolymer (molar ratio: 80:20), N-vinylpyrrolidone-N-vinylpiperidone-2-hydroxyethyl acrylate copolymer (molar ratio: 40:30:30), vinyl alcohol-vinyl acetate-N-vinyl-2-pyridone copolymer (molar ratio: 70:25:5), N-vinylpyrrolidone-2-hydroxyethyl acrylate-vinyl acetate copolymer (molar ratio: 70:20:10), N-vinylpyrrolidone-vinyl alcohol-vinyl propionatesodium styrenesulfonate copolymer (molar ratio: 40:40:5:15), N-vinylpyrrolidone-acrylamide copolymer (molar ratio: 60:40), N-vinylpyrrolidone-2-acrylamide-2-methylpropane-sulfonic acid copolymer (molar ratio: 75:25), N-vinylpiperidoneacrylamide copolymer (molar ratio: 60:40), N-vinyloxazolidone-N-(2-hydroxyethyl)acrylamide copolymer (molar ratio: 70:30), N-vinylpyrrolidone-N-vinylmorpholine-acrylamide copolymer (molar ratio: 50:20:30), N-vinylsuccinimide-N-vinyl-ε-caprolactam-acrylamide copolymer (molar ratio: 40:20:40), N-vinyloxazolidone-acrylamide-acrylic acid copolymer (molar ratio: 60:20:20), N-vinylpyrrolidone-acrylamide-vinyl acetate-acrylic acid copolymer (molar ratio: 60:20:10:10), and N-vinylpyrrolidone-dimethylacrylamide copolymer (molar ratio: 70:30).
Claim 10
Dependent Claim
25 words
The internal latent image silver halide emulsion as in claim 1 wherein said stabilizing amount is 2 mg to 400 mg per mole of silver.
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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |