Patent US4606934A successfully refreshed from Google Patents.
US4606934A
Expired / Lapsed
US
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Process for preparing overcoated electrophotographic imaging members
Assignee: Xerox Corp
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Filing: 1984-09-04
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Granted: 1986-08-19
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Expires: 2004-09-04
Abstract
Abstract A process for forming an overcoated electrophotographic imaging member comprising applying on an electrophotographic imaging member a coating in liquid form comprising a cross-linkable siloxanol-colloidal silica hybrid material having at least one silicon bonded hydroxyl group per every three --SiO-- units and a catalyst for the cross-linkable siloxanol-colloidal silica hybrid material, the coating in liquid form having an acid number less than about 1 and curing the cross-linkable siloxanol-colloidal silica hybrid material until the siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer.
Inventors
- 👤 Lieng-Huang Lee
- 👤 Deborah J. Nichol-Landry
- 👤 Christine J. Tarnawskyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14747; G03G5/14773; G03G5/14704; G03G5/14791
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A process for forming an overcoated electrophotographic imaging member comprising the steps of providing an electrophotographic imaging member, applying a final outer coating in liquid form comprising 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 a catalyst for said cross-linkable siloxanol-colloidal silica hybrid material, said coating in liquid form having an acid number less than about 1, and curing said cross-linkable siloxanol-colloidal silica hybrid material until said siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer substantially free of any detectable acid and having a thickness between about 0.3 and about 3 micrometers.
Claim 2
Dependent Claim
114 words
A process for forming an overcoated electrophotographic imaging member comprising the steps of providing an electrophotographic imaging member, applying a final outer coating in liquid form comprising 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 a catalyst for said cross-linkable siloxanol-colloidal silica hybrid material, said coating in liquid form having an acid number less than about 1, and curing said cross-linkable siloxanol-colloidal silica hybrid material until said siloxanol-colloidal silica hybrid material forms a hard cross-linked solid organosiloxane-silica hybrid polymer layer substantially free of any detectable acid and having a thickness between about 0.3 and about 3 micrometers.
Claim 3
Dependent Claim
26 words
A process according to claim 1 including heating said coating to activate said catalyst until said coating forms said hard cross-linked solid organosiloxane-silica hybrid polymer layer.
Claim 4
Dependent Claim
21 words
A process according to claim 2 wherein said coating in liquid form includes a plasticizer for said siloxanol-colloidal silica hybrid material.
Claim 5
Dependent Claim
17 words
A process according to claim 3 wherein said plasticizer is a dimethyl polysiloxane having hydroxyl end groups.
Claim 6
Dependent Claim
13 words
A process according to claim 3 wherein said plasticizer is a octyl trimethoxysilane.
Claim 7
Dependent Claim
28 words
A process according to claim 1 wherein said curing of said coating is continued until said hard cross-linked organosiloxane-silica hybrid polymer layer is substantially insoluble in isopropyl alcohol.
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
20 words
A process according to claim 1 wherein said coating is applied to a primer layer on said electrophotographic imaging member.
Claim 12
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 13
Dependent Claim
38 words
A process according to claim 11 wherein said charge transport layer comprises a diamine dispersed in a polycarbonate resin, said diamine having the 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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |