US4061499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hardening silver halide photographic layers with organic asymmetric monocarbodiimides
Assignee: Agfa Gevaert AG
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Filing: 1976-10-06
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Granted: 1977-12-06
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Expires: 1996-10-06
Abstract
Abstract As quick-acting hardeners for protein-containing photographic layers water-soluble, organic, asymmetric monocarbodiimides containing an alkyl ammonium group and having a carbonamide group attached to the nitrogen atom are used.
Inventors
- 👤 Wolfgang Himmelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:55
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/182; C07D295/185; C07D295/04; C07D295/14; C07D295/145; C07D295/15; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
193 words
A process for providing a hardened layer in a photographic material containing a light sensitive silver halide emulsion and at least one layer containing a protein containing binder wherein the improvement comprises incorporating a hardener in the binder which is a water-soluble, organic, asymmetric monocarbadiimide of the formula: ##STR41## wherein R 1 denotes alkyl with 1-6 carbon atoms, cycloalkyl, aralkyl, alkoxyalkyl or an olefinically unsaturated lower alkyl group, R 2 denotes alkylene with 2-4 carbon atoms, R 3 and R 4 denote alkyl with 1-3 carbon atoms or R 3 and R 4 together denote the atoms required to complete a 5- to 7-membered saturated heterocyclic ring which may contain other hetero atoms in addition to the nitrogen atom, R 5 denotes alkylene with 1 to 3 C-atoms, R 6 denotes hydrogen, alkyl with 1 to 4 C-atoms, cycloalkyl, aryl or SO 2 -alkyl, R 7 denotes hydrogen or alkyl with 1 to 9 C-atoms, or R 6 and R 7 together denote the atoms required to complete a 5- to 7-membered saturated heterocyclic ring which may contain other hetero atoms in addition to the nitrogen atom, and X - denotes an anion.
Claim 2
Dependent Claim
193 words
A process for providing a hardened layer in a photographic material containing a light sensitive silver halide emulsion and at least one layer containing a protein containing binder wherein the improvement comprises incorporating a hardener in the binder which is a water-soluble, organic, asymmetric monocarbadiimide of the formula: ##STR41## wherein R 1 denotes alkyl with 1-6 carbon atoms, cycloalkyl, aralkyl, alkoxyalkyl or an olefinically unsaturated lower alkyl group, R 2 denotes alkylene with 2-4 carbon atoms, R 3 and R 4 denote alkyl with 1-3 carbon atoms or R 3 and R 4 together denote the atoms required to complete a 5- to 7-membered saturated heterocyclic ring which may contain other hetero atoms in addition to the nitrogen atom, R 5 denotes alkylene with 1 to 3 C-atoms, R 6 denotes hydrogen, alkyl with 1 to 4 C-atoms, cycloalkyl, aryl or SO 2 -alkyl, R 7 denotes hydrogen or alkyl with 1 to 9 C-atoms, or R 6 and R 7 together denote the atoms required to complete a 5- to 7-membered saturated heterocyclic ring which may contain other hetero atoms in addition to the nitrogen atom, and X - denotes an anion.
Claim 3
Dependent Claim
22 words
The process as claimed in claim 1 wherein the binder is comprised of gelatine and homopolymers and copolymers which have carboxyl groups.
Claim 4
Dependent Claim
17 words
The process as claimed in claim 1 including the step of applying the hardener from aqueous solution.
Claim 5
Dependent Claim
17 words
The process as claimed in claim 1 including the step of applying the hardener from alcoholic solution.
Claim 6
Dependent Claim
18 words
The process as claimed in claim 1 including the step of applying the hardener from aqueous alcoholic solution.
Claim 7
Dependent Claim
49 words
The process as claimed in claim 1 wherein the layer to be hardened is cast and the hardener is used in quantities of from 0.2 to 8% by weight, based on the weight of the protein-containing binder, in the casting solution for the layer which is to be hardened.
Claim 8
Dependent Claim
26 words
The process as claimed in claim 1 including the step of applying the hardener as a 0.1 to 10% solution before the photographic material is processed.
Claim 9
Dependent Claim
26 words
The process as claimed in claim 1 wherein the protein-containing binder layer is coated with a 0.1 to 10% solution of the hardener and then dried.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein the photographic material is a multi-layered color photographic material.
References Cited (Backward Citations)
US3100704A
Cited
US3880665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |