Patent EP0307856A2 successfully refreshed from Google Patents.
EP0307856A2
Expired / Lapsed
EP
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Photographic element having polymer particles covalently bonded to gelatin
Assignee: Eastman Kodak Co
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Filing: 1988-09-13
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Granted: —
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Expires: 2008-09-13
Abstract
Abstract A photographic element comprising a support having thereon a gelatin-containing layer, and a matting agent comprising polymer particles covalently bonded to the gelatin in the layer. The polymer particles may be individually covered with gelatin that is covalently bonded thereto and the gelatin that is covalently bonded to the particles may be cross-linked with the gelatin in the layer. There is also provided a process of preparing a photographic element comprising a matting agent and a layer comprising gelatin. In this process, the gelatin layer is coated onto a support, at least partially dried, and polymer particles are applied to the layer. The polymer particles are then covalently bonded to the gelatin in the layer.
Inventors
- 👤 Pranab C/O Eastman Kodak Company Bagchi
- 👤 Howard Milburn C/O Eastman Kodak Company Low
- 👤 Melvin David C/O Eastman Kodak Company Sterman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 18:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A photographic element comprising a support having thereon: a layer comprising gelatin, and a matting agent, characterized in that the matting agent comprises polymer particles that are covalently bonded to said gelatin.
Claim 2
Dependent Claim
32 words
A photographic element comprising a support having thereon: a layer comprising gelatin, and a matting agent, characterized in that the matting agent comprises polymer particles that are covalently bonded to said gelatin.
Claim 3
Dependent Claim
22 words
A photographic element according to Claim 1 wherein the polymer particles are covalently bonded to gelatin on the surface of said layer.
Claim 4
Dependent Claim
16 words
A photographic element according to Claims 1 or 2 wherein said layer further comprises silver halide.
Claim 5
Dependent Claim
37 words
A photographic element according to Claims 1-3 wherein said polymer particles are each individually covered with a layer of gelatin that is covalently bonded thereto and which is also covalently bonded to the gelatin in said layer.
Claim 6
Dependent Claim
18 words
A photographic element according to Claims 1-4 wherein the said layer is the outermost layer of the element.
Claim 7
Dependent Claim
46 words
A photographic element according to Claims 1-5 wherein the polymer in said particles comprises an active halogen atom, an isocyanate group, an epoxide group, an aldehyde group, a chloroethylsulfone group, a vinyl sulfone group, an amine group, a carboxylic acid group, or an active methylene group.
Claim 8
Dependent Claim
64 words
A photographic element according to Claims 1-6 wherein said polymer particles comprise from 0.1 to 100 mole percent of a copolymer comprising an active chlorine atom, an isocyanate group, an epoxy group, an active halogen atom, an isocyanate group, an epoxide group, an aldehyde group, a chloroethylsulfone group, a vinyl sulfone group, an amine group, a carboxylic acid group, or an active methylene group.
Claim 9
Dependent Claim
57 words
A photographic element according to Claims 1-7 wherein the polymer particles comprise repeating units of the formula: wherein A represents recurring units derived from one or more monomers that are capable of covalently bonding with gelatin, B represents recurring units derived from one or more other ethylenically unsaturated monomers, and x represents 0.1 to 100 mole percent.
Claim 10
Dependent Claim
20 words
A photographic element according to Claims 1-8 wherein the polymer particles have a mean diameter of 1 to 15 microns.
Claim 11
Dependent Claim
14 words
A photographic element according to Claims 1-9 wherein the polymer particles are spherical beads.
Claim 12
Dependent Claim
53 words
A process of preparing a photographic element comprising a matting agent and a layer comprising gelatin, comprising the steps of coating said layer onto a support, at least partially drying said layer, applying polymer particles to the surface of said layr, and covalently bonding the polymer particles to the gelatin in said layer.
Claim 13
Dependent Claim
53 words
A process of preparing a photographic element comprising a matting agent and a layer comprising gelatin, comprising the steps of coating said layer onto a support, at least partially drying said layer, applying polymer particles to the surface of said layr, and covalently bonding the polymer particles to the gelatin in said layer.
References Cited (Backward Citations)
No citation records indexed.
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