US3967966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic gelatine layers with improved physical and photographic properties
Assignee: Agfa Gevaert AG
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Filing: 1973-04-17
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Granted: 1976-07-06
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Expires: 1993-04-17
Abstract
Abstract The mechanical properties of gelatin layers for photographic materials are improved by the addition of water-insoluble, elastic copolymers which consist of acrylic acid or methacrylic acid esters (I) which may be mixed with other vinyl and divinyl monomers (II) and which contain comonomers (III) which contain disulfone imidoester or sulfonimidophosphoric acid ester or amide groups.
Inventors
- 👤 Wolfgang Himmelmann
- 👤 Gerhard Balle
- 👤 Fritz Nittel
- 👤 Wilhelm Saleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F28/00; C08F30/00; C08F30/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
In a photographic material containing a gelatin layer in which the gelatin is plasticized, the improvement according to which it is plasticized with a substantially water-insoluble compolymer of a. at least one C 1 to C 18 alkyl ester of acrylic acid or C 4 to C 18 alkyl ester of methacrylic acid, and b. a disulfonimide or sulfonimido-phosphate or sulfonimido-phosphoric acid amide, the copolymer being at least 70% (a) and at least 5% (b), and the copolymer being present in an amount from about 5% to about 100% of the gelatin by weight.
Claim 2
Dependent Claim
94 words
In a photographic material containing a gelatin layer in which the gelatin is plasticized, the improvement according to which it is plasticized with a substantially water-insoluble compolymer of a. at least one C 1 to C 18 alkyl ester of acrylic acid or C 4 to C 18 alkyl ester of methacrylic acid, and b. a disulfonimide or sulfonimido-phosphate or sulfonimido-phosphoric acid amide, the copolymer being at least 70% (a) and at least 5% (b), and the copolymer being present in an amount from about 5% to about 100% of the gelatin by weight.
Claim 3
Dependent Claim
31 words
The combination of claim 1 in which the polymer is a polymer of (a), (b), and a vinyl or divinyl monomer, and the polymer has a glass transition temperature below 10°C.
Claim 4
Dependent Claim
18 words
The combination of claim 1 in which the copolymer has an average weight of from 5000 to 500,000.
Claim 5
Dependent Claim
152 words
The combinations of claim 1 wherein the copolymer is present in the gelatin in an amount at least 20% by weight of the gelatin, the second comonomer is a compound of one of the following formulae: ##EQU4## in which R represents a divalent hydrocarbon group, R 1 represents a monovalent hydrocarbon group, or the group represented in square brackets in formula (A), R 2 represents one of the groups --OR 4 , --NH--R 4 or --N(R 4 )2, R 3 represents the group shown in square brackets in formula (B), or R 2 , R 4 represents a monovalent hydrocarbon group, Y represents a divalent bridge having the structure ##EQU5## --O--CO-- or --CO--, in which the carbonyl group is in each case attached to the carbon of the double bond, n = 0 or 1, Z represents hydrogen, a methyl or the carboxyl group and Z', z", z'" represents hydrogen or methyl.
Claim 6
Dependent Claim
23 words
The combination of claim 1 in which the ester (a) is methyl, ethyl, isopropyl, n-butyl or iso-octyl acrylate or n-butyl, n-octyl or n-dodecylmethacrylate.
Claim 7
Dependent Claim
48 words
The combination of claim 2 in which the vinyl or divinyl monomer is selected from the group consisting of an amide or nitrile of acrylic or methacrylic acid, a vinyl ester of a saturated fatty acid, an N-vinylimide, a lactam, a vinyl ether, an olefine, and a 1,3-diolefine.
Claim 8
Dependent Claim
16 words
The combination of claim 3 in which the copolymer has a particle size below 1 μ.
Claim 9
Dependent Claim
17 words
The combination of claim 4 in which R represents a C 1 to C 18 hydrocarbon group.
Claim 10
Dependent Claim
18 words
The combination of claim 4 in which R 1 represents a C 1 to C 18 hydrocarbon group.
Claim 11
Dependent Claim
18 words
The combination of claim 4 in which R 2 represents a C 1 to C 18 hydrocarbon group.
Claim 12
Dependent Claim
18 words
The combination of claim 4 in which R 4 represents a C 1 to C 18 hydrocarbon group.
Claim 13
Dependent Claim
45 words
The combination of claim 6 in which the vinyl or divinyl monomer is selected from the group consisting of vinyl acetate, vinyl propionate, vinyl stearate, N-vinyl succinimide, N-vinyl pyrrolidone, vinyl ether, vinyl isobutyl ether, ethylene, propylene, 1-butene, isobutene, styrene, vinyl toluene, butadiene, isoprene, and chloroprene.
Claim 14
Dependent Claim
20 words
The combination of claim 7 in which the particle size of the copolymer is of the order of 0.1 μ.
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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |