US4418142A
Expired / Lapsed
US
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Light-sensitive photographic silver halide recording material
Assignee: Agfa Gevaert AG
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Filing: 1981-10-02
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Granted: 1983-11-29
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Expires: 2001-10-02
Abstract
Abstract The light-sensitive color photographic silver halide recording material contains in at least one of its light-sensitive gelatine-containing layer, color formers for the formation of the image dyes in the three primary colors, a crosslinking agent activating the carboxyl groups of gelatine selected from carbamoylonium salts, carbamoylpyridinium salts and carbamoyloxypyridinium salts and a compound acting as aldehyde-scavenger which corresponds to the general formula ##STR1## wherein Z represents the atoms required for completing a 5-6-membered substituted or unsubstituted carbocyclic ring or a substituted or unsubstituted heterocyclic ring which may contain oxygen, nitrogen or sulfur as hetero-atom.
Inventors
- 👤 Hans Langen
- 👤 Erich Wolff
- 👤 Erwin Ranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/33; G03C1/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Light-sensitive color photographic silver halide recording material consisting of a layer support and applied to this layer at least one light-sensitive gelatine-containing layer containing color couplers for the formation of the image dyes in the three primary colors, a cross-linking agent which activates the carboxyl groups of the gelatine and a compound acting as aldehyde-scavenger, characterised in that the cross-linking agent which activates the carboxyl groups of gelatine is a gelatine hardener selected from carbamoylonium salts, carbamoylpridinium salts and carbamoyloxypyridinium salts, and the compound acting as aldehyde-scavenger corresponds to the following general formula: ##STR68## wherein Z represents the atoms required for completing a 5- or 6-membered, substituted or unsubstituted carbocyclic ring or a substituted or unsubstituted heterocyclic ring which may contain oxygen, nitrogen or sulfur as heteroatom.
Claim 2
Dependent Claim
127 words
Light-sensitive color photographic silver halide recording material consisting of a layer support and applied to this layer at least one light-sensitive gelatine-containing layer containing color couplers for the formation of the image dyes in the three primary colors, a cross-linking agent which activates the carboxyl groups of the gelatine and a compound acting as aldehyde-scavenger, characterised in that the cross-linking agent which activates the carboxyl groups of gelatine is a gelatine hardener selected from carbamoylonium salts, carbamoylpridinium salts and carbamoyloxypyridinium salts, and the compound acting as aldehyde-scavenger corresponds to the following general formula: ##STR68## wherein Z represents the atoms required for completing a 5- or 6-membered, substituted or unsubstituted carbocyclic ring or a substituted or unsubstituted heterocyclic ring which may contain oxygen, nitrogen or sulfur as heteroatom.
Claim 3
Dependent Claim
66 words
Material according to claim 1, characterised in that the compound acting as aldehyde-scavenger is selected from cyclopentane-1,3-diones, cyclohexane-1,3-diones, pyran-2,4-diones, dihydropyran-2,4-diones, thiopyran-2,4-diones, dioxa-cyclohexane-2,4-diones, tetrahydropyrimidine-2,4-diones and 2,4,6-trioxohexahydropyrimidines, in which compounds the ring carbon atoms may be substituted with straight- or branched-chain alkyl groups having from 1 to 5 carbon atoms or carry a condensed cycloaliphatic or aromatic 6-membered ring or an aliphatic 5- or 6-membered ring in spiro-linkage.
Claim 4
Dependent Claim
37 words
Material according to claim 1, characterised in that in the general formula of said aldehyde-scavenger the total number of carbon atoms of the substituents in the ring carrying the two keto groups is not greater than 6.
Claim 5
Dependent Claim
26 words
Material according to claims 1, 2 or 3, characterised in that said gelatine hardener is a carbamoylpyridinium sulfonic acid betaine and said aldehyde-scavenger is a tetrahydropyrimidine-2,4-dione.
Claim 6
Dependent Claim
22 words
Material according to claim 1, characterised in that said gelatin hardener is of the following formula ##STR69## and said aldehyde-scavenger is 1-methyl-2,4,6-trioxo-hexahydropyrimidine.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |