EP0332921A2
Expired / Lapsed
EP
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Multiactive electrophotographic element
Assignee: Eastman Kodak Co
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Filing: 1989-02-28
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Granted: —
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Expires: 2009-02-28
Abstract
Abstract An improved reusable multiactive electrophotographic element has a charge-transport layer comprising a triarylamine charge-transport material in a mixture of binders comprising poly[2,2-bis(4-hydroxyphenyl)propane carbonate] and a polyester of 4,4′-(2-norbornylidene)diphenol and terephthalic and azelaic acids, with the weight ratio of the polycarbonate to the polyester being in the range of 9:1 to 3:7.
Inventors
- 👤 William Joseph C/Oeastman Kodak Comp Staudenmayer
- 👤 David Steven C/Oeastman Kodak Company Weiss
- 👤 Joseph Anthony C/Oeastman Kodak Comp. Pavlisko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:03
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/056; G03G5/0564
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
An electrophotographic element comprising: an electrically conductive support; a charge-generation layer comprising a photoconductive material sensitive to visible or infrared radiation; and a charge-transport layer containing a triarylamine charge-transport material, characterized in that the charge-transport layer comprises a mixture of a polycarbonate comprising poly[2,2-bis(4-hydroxyphenyl)propane carbonate] and a polyester formed from 4,4′-(2-norbornylidene)diphenol and terephthalic and azelaic acids, and the weight ratio of the polycarbonate to the polyester is in the range of 9:1 to 3:7.
Claim 2
Dependent Claim
74 words
An electrophotographic element comprising: an electrically conductive support; a charge-generation layer comprising a photoconductive material sensitive to visible or infrared radiation; and a charge-transport layer containing a triarylamine charge-transport material, characterized in that the charge-transport layer comprises a mixture of a polycarbonate comprising poly[2,2-bis(4-hydroxyphenyl)propane carbonate] and a polyester formed from 4,4′-(2-norbornylidene)diphenol and terephthalic and azelaic acids, and the weight ratio of the polycarbonate to the polyester is in the range of 9:1 to 3:7.
Claim 3
Dependent Claim
22 words
The electrophotographic element of claim 1, wherein the molar ratio of terephthalic acid:azelaic acid from which the polyester was formed is 40:60.
Claim 4
Dependent Claim
24 words
The electrophotographic element of claim 1, wherein the weight ratio of the polycarbonate to the polyester is in the range of 8:2 to 6:4.
Claim 5
Dependent Claim
13 words
The electrophotographic element of claim 1, wherein the triarylamine charge-transport material comprises 1,1-bis[4-(di-4-tolylamino)phenyl]-3-phenylpropane.
References Cited (Backward Citations)
No citation records indexed.
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