US5089364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic imaging members containing a polyurethane adhesive layer
Assignee: Xerox Corp
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Filing: 1990-10-26
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Granted: 1992-02-18
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Expires: 2010-10-26
Abstract
Abstract An electrophotographic imaging member is disclosed which contains a substrate having an electrically conductive surface, a dried continuous adhesive layer comprising a semi-interpenetrating network derived from a coating mixture comprising a blend of a self-crosslinkable polyurethane and a non-self-crosslinkable polyurethane, a thin homogeneous charge generating layer, and a charge transport layer comprising a film forming polymer.
Inventors
- 👤 Lieng-Huang Lee
- 👤 Diane C. Lincoln
- 👤 Christine J. Tarnawskyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:33
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 words
A process for fabricating an electrophotographic imaging member comprising providing a substrate having an electrically conductive surface, applying an aqueous dispersion or aqueous latex comprising a non-self-crosslinkable polyurethane and a self-crosslinkable polyurethane, solidifying said polyurethanes to form a continuous adhesive layer having a semi-interpenetrating network structure, forming a thin homogeneous charge generating layer on said adhesive layer, applying a coating of a solution of a charge transport layer forming composition comprising a film forming polymer dissolved in an organic solvent and solidifying said polymer to form a charge transport layer.
Claim 2
Dependent Claim
90 words
A process for fabricating an electrophotographic imaging member comprising providing a substrate having an electrically conductive surface, applying an aqueous dispersion or aqueous latex comprising a non-self-crosslinkable polyurethane and a self-crosslinkable polyurethane, solidifying said polyurethanes to form a continuous adhesive layer having a semi-interpenetrating network structure, forming a thin homogeneous charge generating layer on said adhesive layer, applying a coating of a solution of a charge transport layer forming composition comprising a film forming polymer dissolved in an organic solvent and solidifying said polymer to form a charge transport layer.
Claim 3
Dependent Claim
29 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein the dried thickness of said adhesive layer is between about 400 Angstroms and about 1800 Angstroms.
Claim 4
Dependent Claim
27 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein the dried thickness layer of said adhesive layer is between 800 and 1200 Angstroms.
Claim 5
Dependent Claim
41 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein the solids content in said aqueous dispersion is between about 30 percent by weight and about 40 percent by weight, based on the total weight of said dispersion.
Claim 6
Dependent Claim
36 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein the solids weight ratio of said non-self-crosslinkable polyurethane to said self-crosslinkable polyurethane in said aqueous dispersion is between about 80:20 and about 60:40.
Claim 7
Dependent Claim
30 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein said self-crosslinkable polyurethane has terminal groups selected from aziridinyl-, mercapto-, amino-, epoxy-, chloromethyl, carboxyl- and alkoxymethyl- groups.
Claim 8
Dependent Claim
52 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein said non-self-crosslinkable polyurethane comprises polyurethanes predominantly terminated with hydroxy groups represented by the formula: HO--[--CO--NH--R--NH--CO--O--R'--O--].sub.x --H wherein R and R' are unsubstituted or substituted alkyl groups having 1 to 10 carbon atoms and x is 1 to about 5000.
Claim 9
Dependent Claim
34 words
A process for fabricating an electrophotographic imaging member according to claim 1 forming on said adhesive layer a thin homogeneous charge generating layer having thickness of between about 5000 Angstroms and about 9000 Angstroms.
Claim 10
Dependent Claim
19 words
A process for fabricating an electrophotographic imaging member according to claim 8 including vacuum depositing said charge generating layer.
Claim 11
Dependent Claim
19 words
A process for fabricating an electrophotographic imaging member according to claim 8 including dispersion coating said charge generating layer.
Claim 12
Dependent Claim
37 words
A process for fabricating an electrophotographic imaging member according to claim 1 including forming a charge blocking layer having a thickness between about 200 and about 400 Angstroms between said electrically conductive surface and said adhesive layer.
Claim 13
Dependent Claim
41 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein said solution of said charge transport layer forming composition comprises a film forming polymer dissolved in an organic solvent which dissolves, swells or diffuses through said adhesive layer.
Claim 14
Dependent Claim
20 words
A process for fabricating an electrophotographic imaging member according to claim 1 wherein said substrate is a thin flexible web.
Claim 15
Dependent Claim
53 words
An electrophotographic imaging member comprising a substrate having an electrically conductive surface, a dried continuous adhesive layer comprising a semi-interpenetrating network derived from a coating mixture comprising a blend of a self-crosslinkable polyurethane and a non-self-crosslinkable polyurethane, a thin homogeneous charge generating layer, and a charge transport layer comprising a film forming polymer.
Claim 16
Dependent Claim
53 words
An electrophotographic imaging member comprising a substrate having an electrically conductive surface, a dried continuous adhesive layer comprising a semi-interpenetrating network derived from a coating mixture comprising a blend of a self-crosslinkable polyurethane and a non-self-crosslinkable polyurethane, a thin homogeneous charge generating layer, and a charge transport layer comprising a film forming polymer.
Claim 17
Dependent Claim
32 words
An electrophotographic imaging member according to claim 14 wherein the solids weight ratio of said non-self-crosslinkable polyurethane to the self-crosslinkable polyurethane in said adhesive layer is between about 80:20 and about 60:40.
Claim 18
Dependent Claim
24 words
An electrophotographic imaging member according to claim 14 wherein the thickness of said adhesive layer is between about 400 angstroms and about 1800 angstroms.
Claim 19
Dependent Claim
24 words
An electrophotographic imaging member according to claim 14 wherein the thickness of said adhesive layer is between about 800 angstroms and about 1200 angstroms.
Claim 20
Dependent Claim
26 words
An electrophotographic imaging member according to claim 14 wherein said thin homogeneous charge generating layer has thickness of between about 5000 angstroms and about 9000 angstroms.
Claim 21
Dependent Claim
16 words
An electrophotographic imaging member according to claim 14 wherein said charge generating layer comprises benzimidazole perylene.
Claim 22
Dependent Claim
16 words
An electrophotographic imaging member according to claim 14 wherein said substrate is a thin flexible web.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |