US4148637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silane coupling agent in protective layer of photoconductive element
Assignee: Ricoh Co Ltd
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Filing: 1977-01-07
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Granted: 1979-04-10
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Expires: 1997-01-07
Abstract
Abstract The present invention provides a photosensitive material for use in electrophotography which comprises a conductive support having a photoconductive layer coated with a protective layer, the material being superior in light-decay property, mechanical strength and image formability, wherein said protective layer is composed of either (1) a member selected from the group of resins consisting of polyvinyl butyral, polyvinyl acetate, acryl or derivative resins thereof, copolymers of styrene and maleic anhydride or alkyl esters thereof, copolymers of vinyl acetate or derivatives thereof and vinyl pyrrolidone, copolymers of butyl vinyl ether and maleic anhydride or alkyl monoesters thereof and shellac, or of (2) a resin and silane-coupling agent.
Inventors
- 👤 Tomio Kubota
- 👤 Akio Kojima
- 👤 Yoshikazu Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:13
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14747; G03G5/14717; G03G5/1473; G03G5/14734; G03G5/14739; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A photosensitive material for use in electrophotography comprising an electrically conductive support having a photoconductive layer overcoated thereon with a protective layer wherein said protective layer is composed of a film forming, transparent resin and, based on the total weight of the protective layer, from about 0.01 wt.% to 10 wt.% of a silane-coupling agent.
Claim 2
Dependent Claim
55 words
A photosensitive material for use in electrophotography comprising an electrically conductive support having a photoconductive layer overcoated thereon with a protective layer wherein said protective layer is composed of a film forming, transparent resin and, based on the total weight of the protective layer, from about 0.01 wt.% to 10 wt.% of a silane-coupling agent.
Claim 3
Dependent Claim
70 words
A photosensitive material according to claim 1, wherein said resin is a member selected from the group consisting of polyvinyl butyral, polyvinyl acetate, acrylic or derivative resins thereof, copolymers of styrene and maleic anhydride or alkyl esters thereof, copolymers of vinyl acetate or derivatives thereof and vinyl pyrrolidone, copolymers of butyl vinyl ether and maleic anhydride or alkyl monoesters thereof, shellac, polyamides, polyvinyl pyrrolidones, polyvinyl alcohols, polyvinyl acetals and cellulose.
Claim 4
Dependent Claim
52 words
A photosensitive material according to claim 1, wherein said silane-coupling agent is at least one member selected from the group consisting of vinyl chlorosilane, vinyl triethoxysilane, vinyl trimethoxsilane, vinyl-tris (β-methoxyethoxy)silane, γ-methacryl oxypropyl trimethoxysilane, γ-methacryl oxypropyl tris(β-methoxycthoxy)silane, β-(3,4-epoxycyclohexyl)ethyl trimethoxysilane, γ-glycidoxypropyl methoxysilane, γ-aminopropyl triethoxysilane, N-β-(aminoethyl)-γ-aminopropyl trimethoxysilane, N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxysilane, N-N-bis(β-hydroxyethyl)-γ-aminopropyl triethoxysilane and γ-chloropropyl trimethoxysilane.
Claim 5
Dependent Claim
66 words
A photosensitive material according to claim 1, wherein said protective layer additionally contains an adhesive which is at least one member selected from the group consisting of polyvinyl butyral, polyvinyl alcohol, polyvinyl chloride, polyvinyl acetate, acrylic resins, epoxide resins, urea resins and urethane resins, and a cross-linking agent which is at least one member selected from the group consisting of aminotriazines, epoxide resins, and urethane resins.
Claim 6
Dependent Claim
13 words
A photosensitive material according to claim 4, wherein said cross-linking agent is aminotriazine.
Claim 7
Dependent Claim
37 words
A photosensitive material according to claim 1, wherein said protective layer additionally contains a curing catalyst which is at least one member selected from the group consisting of sulfuric acid, paratoluene sulfonic acid and 1-naphthalene sulfonic acid.
Claim 8
Dependent Claim
18 words
A photosensitive material according to claim 1, wherein said protective layer contains silicone oil as a wetting agent.
Claim 9
Dependent Claim
34 words
A photosensitive material according to claim 1, wherein said protective layer additionally contains at least one member selected from the group consisting of quartz sand, glass fiber, amorphous or crystal silica and metal oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |