US4434218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive composition for electrophotography
Assignee: Konica Minolta Inc
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Filing: 1981-06-03
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Granted: 1984-02-28
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Expires: 2001-06-03
Abstract
Abstract A novel photosensitive composition including a photoconductive cadmium sulfide-group compound and a water-soluble prepolymer capable of forming a network structure by cross-linking, the composition being applied as a photosensitive layer of a photosensitive article for electrophotography having a conductive substrate.
Inventors
- 👤 Noriyoshi Tarumi
- 👤 Akihiko Tamura
- 👤 Masakazu Kokiso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
A photosensitive article comprising: (1) a conductive substrate; and, (2) an uppermost photosensitive layer which is a heat-dried coating of a photosensitive composition comprising an aqueous solution of a water-soluble prepolymer capable of forming a network structure by cross-linking, and a photoconductive compound selected from the group consisting of cadmium sulfide, cadmium selenide, cadmium sulfoselenide, zinc sulfide and zinc selenide.
Claim 2
Dependent Claim
60 words
A photosensitive article comprising: (1) a conductive substrate; and, (2) an uppermost photosensitive layer which is a heat-dried coating of a photosensitive composition comprising an aqueous solution of a water-soluble prepolymer capable of forming a network structure by cross-linking, and a photoconductive compound selected from the group consisting of cadmium sulfide, cadmium selenide, cadmium sulfoselenide, zinc sulfide and zinc selenide.
Claim 3
Dependent Claim
45 words
The article of claim 1 wheren said water-soluble prepolymer is at least one condensation-type prepolymer selected from the group consisting of an alkyd resin prepolymer, a phenolic resin prepolymer, an amino resin prepolymer, an epoxy resin prepolymer, an urethane resin prepolymer and a cellulose derivative.
Claim 4
Dependent Claim
48 words
The article of claim 1 wherein said water-soluble prepolymer is at least one polymerization-type prepolymer selected from the group consisting of a polyacrylic acid prepolymer, a derivative of a polyacrylic acid prepolymer, a polyacrylamide prepolymer, a polyvinylprrolidone prepolymer, a polyvinylether prepolymer, a polyvinylalcohol prepolymer and a copolymer thereof.
Claim 5
Dependent Claim
16 words
The article of claim 1 wherein said water-soluble prepolymer is in the form of ammonium salt.
Claim 6
Dependent Claim
31 words
The article of claim 1 wherein said water-soluble prepolymer is contained in an amount of from 10 to 100 parts by weight per 100 parts by weight of said photoconductive compound.
Claim 7
Dependent Claim
30 words
The article of claim 1 wherein said water is contained in an amount of from 20 to 300 parts by weight per 100 parts by weight of said photoconductive compound.
Claim 8
Dependent Claim
62 words
The article of claim 1 wherein said photosensitive composition further comprises a hardener selected from the group consisting of an aldehyde, an urea resin prepolymer, a melamine resin prepolymer, a phenolic resin prepolymer an epoxy, ester resin prepolymer and a polybasic acid, in an amount of from 0 to 100 parts by weight per 100 parts by weight of said photoconductive compound.
Claim 9
Dependent Claim
47 words
The article of claim 1 wherein said photosensitive composition further comprises a polymerization accelerator selected from the group consisting of cobalt naphthenate, calcium naphthenate and lead naphthenate in an amount of from 0 to 10 parts by weight per 100 parts by weight of said photoconductive compound.
Claim 10
Dependent Claim
61 words
The article of claim 1 wherein said photosensitive composition further comprises an amphipathic solvent selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, secondary or tertiary butyl alcohol, methyl cellosolve, butyl cellosolve, ethoxybutyl alcohol and ether in an amount of from 0 to 300 parts by weight per 100 parts by weight of said photoconductive compound.
Claim 11
Dependent Claim
30 words
The article of claim 1 wherein said photosensitive composition further comprises a neutralizing agent selected from the group consisting of ammonia, triethylamine, mono-, di-, triethanol amine, dimethylamine ethanol and diethylaminoethanol.
Claim 12
Dependent Claim
16 words
The article of claim 1 wherein said photosensitive composition further comprises a fluorine-containing surface active agent.
Claim 13
Dependent Claim
38 words
A process for producing an electrophotographic element, said process comprising: (1) coating a conductive substrate with the aqueous solution defined in claim 1; and, (2) heating the coated substrate to dry the coating, thereby producing the electrophotographic article.
Claim 14
Dependent Claim
13 words
The process of claim 12 wherein said conductive substrate is a metal plate.
Claim 15
Dependent Claim
17 words
The process of claim 12 wherein said conductive substrate is a thin metal film and plastic laminate.
Claim 16
Dependent Claim
31 words
The process of claim 12 wherein said drying is at a temperature of 60° to 250° C. and is conducted over a period of time of fifteen minutes to three hours.
References Cited (Backward Citations)
CA560435A
Cited
US2993787A
Cited
AU204093B2
Cited
US2997387A
Cited
GB893491A
Cited
US3065160A
Cited
GB1188330A
Cited
US3732096A
Cited
US4252883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |