Patent US4439509A successfully refreshed from Google Patents.
US4439509A
Expired / Lapsed
US
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Process for preparing overcoated electrophotographic imaging members
Assignee: Xerox Corp
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Filing: 1982-06-01
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Granted: 1984-03-27
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Expires: 2002-06-01
Abstract
Abstract A process for forming an overcoated electrophotographic imaging member by applying a coating of a cross-linkage siloxanol-colloidal silica hybrid material on an electrophotographic imaging member and thereafter contacting the coating with a fugitive ammonia gas condensation catalyst until the siloxanol-colloidal silica hybrid material forms a cross-linked solid layer. The cross-linkable siloxanol-colloidal silica hybrid material may be prepared by hydrolyzing trifunctional organosilanes and stabilizing the hydrolyzed silanes with colloidal silica. The electrophotographic imaging member may comprise inorganic or organic photoconductive components in one or more layers.
Inventors
- 👤 Richard L. Schank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14791; G03G5/14704; G03G5/14747; G03G5/14773
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A process for forming an overcoated electrophotographic imaging member comprising the steps of providing an electrophotographic imaging member, applying a coating in liquid form of a cross-linkable siloxanol-colloidal silica hybrid material having at least one silicon bonded hydroxyl group per every three --SiO-- units on said electrophotographic imaging member, and contacting said coating with an ammonia gas condensation catalyst until the siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer.
Claim 2
Dependent Claim
74 words
A process for forming an overcoated electrophotographic imaging member comprising the steps of providing an electrophotographic imaging member, applying a coating in liquid form of a cross-linkable siloxanol-colloidal silica hybrid material having at least one silicon bonded hydroxyl group per every three --SiO-- units on said electrophotographic imaging member, and contacting said coating with an ammonia gas condensation catalyst until the siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer.
Claim 3
Dependent Claim
26 words
A process according to claim 1 wherein said cross-linked organosiloxane-silica hybrid polymer solid layer has a thickness of between about 0.5 micron and about 2 microns.
Claim 4
Dependent Claim
32 words
A process according to claim 1 wherein said coating is contacted with said ammonia gas condensation catalyst at about room temperature until said coating forms a cross-linked organosiloxane-silica hybrid polymer solid layer.
Claim 5
Dependent Claim
39 words
A process according to claim 1 including removing said ammonia gas condensation catalyst from said coating after said coating forms a cross-linked organosiloxane-silica hybrid polymer solid layer whereby said layer is substantially free of any ambient temperature curing catalyst.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein said cross-linked organosiloxane-silica hybrid polymer layer is substantially free of difunctional silicone materials.
Claim 7
Dependent Claim
29 words
A process according to claim 1 wherein said ammonia gas condensation catalyst is contacted with said coating until said cross-linked organosiloxane polymer solid layer is substantially insoluble in acetone.
Claim 8
Dependent Claim
21 words
A process according to claim 1 wherein said coating is applied to an amorphous selenium layer of an electrophotographic imaging member.
Claim 9
Dependent Claim
21 words
A process according to claim 1 wherein said coating is applied to a selenium alloy layer of an electrophotographic imaging member.
Claim 10
Dependent Claim
21 words
A process according to claim 1 wherein said coating is applied to a charge generating layer of an electrophotographic imaging member.
Claim 11
Dependent Claim
21 words
A process according to claim 1 wherein said coating is applied to a charge transport layer of an electrophotographic imaging member.
Claim 12
Dependent Claim
39 words
A process according to claim 10 wherein said charge transport layer comprises a diamine dispersed in a polycarbonate resin, said diamine having the following formula: ##STR3## wherein X is selected from the group consisting of CH 3 and Cl.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |