EP0749040A1
Expired / Lapsed
EP
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Imaging element comprising an electrically-conductive layer with enhanced abrasion resistance
Assignee: Eastman Kodak Co
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Filing: 1996-06-10
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Granted: —
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Expires: 2016-06-10
Abstract
Abstract Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer and an electrically-conductive layer comprising electronically-conductive fine particles, such as antimony-doped tin oxide particles, and gelatin-coated water-insoluble polymer particles. The use of gelatin-coated water-insoluble polymer particles as a binder in the electrically-conductive layer facilitates the preparation of stable coating compositions and provides a layer with a high degree of conductivity at low concentrations of electronically-conductive fine particles and with excellent abrasion resistant properties.
Inventors
- 👤 Charles Chester C/O Eastman Kodak Co. Anderson
- 👤 Yongcai c/o Eastman Kodak Co. Wang
- 👤 James Lee c/o Eastman Kodak Co. Bello
- 👤 Mario Dennis c/o Eastman Kodak Co. DeLaura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 12:53
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03G; G03G5/00; G03G5/10; G03G5/104; B41M5/426; B41M5/44; G03C1/005; G03C1/04; G03C1/047; G03C1/853; G03C1/89; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
37 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer and an electrically-conductive layer; characterized in that said electrically-conductive layer comprises electronically-conductive fine particles and gelatin-coated water-insoluble polymer particles.
Claim 2
Dependent Claim
35 words
An imaging element as claimed in claim 1, wherein said electronically-conductive fine particles are composed of a doped-metal oxide, a metal oxide containing oxygen deficiencies, a metal antimonate, or a conductive nitride, carbide or boride.
Claim 3
Dependent Claim
20 words
An imaging element as claimed in claims 1 or 2, wherein said electronically-conductive fine particles are antimony-doped tin oxide particles.
Claim 4
Dependent Claim
38 words
An imaging element as claimed in any of claims 1 to 3, wherein said electronically-conductive fine particles have an average particle size of less than 0.3 µm and a powder resistivity of 10 5 Ωo cm or less.
Claim 5
Dependent Claim
29 words
An imaging element as claimed in any of claims 1 to 4, wherein said gelatin-coated water-insoluble polymer particles have an average diameter of from 10 nm to 1000 nm.
Claim 6
Dependent Claim
29 words
An imaging element as claimed in any of claims 1 to 4, wherein said gelatin-coated water-insoluble polymer particles have an average diameter of from 20 nm to 500 nm.
Claim 7
Dependent Claim
27 words
An imaging element as claimed in any of claims 1 to 6, wherein said gelatin-coated water-insoluble polymer particles have a glass transition temperature of at least 20°C.
Claim 8
Dependent Claim
56 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are selected from the group consisting of polymers of styrene, derivatives of styrene, alkyl acrylates, derivatives of alkyl acrylates, alkyl methacrylates, derivatives of alkyl methacrylates, olefins, vinylidene chloride, acrylonitrile, acrylamide, derivatives of acrylamide, methacrylamide, derivatives of methacrylamide, vinyl esters, vinyl ethers and urethanes.
Claim 9
Dependent Claim
44 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are particles of a copolymer of ethyl acrylate and sodium styrene sulfonat, a copolymer of ethyl methacryate and sodium styrene sulfonat, or a copolymer of methyl methacrylate and sodium styrene sulfonate.
Claim 10
Dependent Claim
27 words
An imaging element as claimed in any of claims 1 to 9, wherein the gelatin/polymer weight ratio of said gelatin-coated water-insoluble polymer particles is 5/95 to 40/60.
Claim 11
Dependent Claim
27 words
An imaging element as claimed in any of claims 1 to 10, wherein said electrically-conductive layer comprises 50 volume % or less of said electronically-conductive fine particles.
Claim 12
Dependent Claim
27 words
An imaging element as claimed in any of claims 1 to 10, wherein said electrically-conductive layer comprises 35 volume % or less of said electronically-conductive fine particles.
Claim 13
Dependent Claim
33 words
An imaging element as claimed in any of claims 1 to 12, wherein the dry coating weight of said electrically-conductive layer is in the range of from 100 to 1500 mg/m 2 .
References Cited (Backward Citations)
US5374498A
Cited
US5340676A
Cited
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