US4933245A
Expired / Lapsed
US
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Electrophotographic photoreceptor
Assignee: Fujifilm Business Innovation Corp
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Filing: 1987-09-18
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Granted: 1990-06-12
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Expires: 2007-09-18
Abstract
Abstract An electrophotographic photoreceptor is disclosed, which comprises an electrically conductive support having provided thereon a photoconductive layer containing, as a charge transport material, a compound represented by formula (I) ##STR1## wherein R 1 represents an alkyl group, and R 2 and R 3 , which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, or a substituted amino group. The photoreceptor satisfies both electrical and mechanical requirements without undergoing adverse influences from binder resins used therein.
Inventors
- 👤 Yutaka Akasaki
- 👤 Katsuhiro Sato
- 👤 Naoya Yabuuchi
- 👤 Kiroyuki Tanaka
- 👤 Katsumi Nukada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/056; G03G5/0564; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443; G03G5/0618
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (I) ##STR49## wherein R 1 represents an alkyl group, and R 2 and R 3 , which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, or a substituted amino group.
Claim 2
Dependent Claim
67 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (I) ##STR49## wherein R 1 represents an alkyl group, and R 2 and R 3 , which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, or a substituted amino group.
Claim 3
Dependent Claim
47 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (II) ##STR50## wherein R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or a methyl group.
Claim 4
Dependent Claim
47 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (II) ##STR50## wherein R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or a methyl group.
Claim 5
Dependent Claim
68 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (III) ##STR51## wherein at least one of R 6 and R 7 represents an alkyl group having 2 or more carbon atoms, and the other represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.
Claim 6
Dependent Claim
68 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material represented by formula (III) ##STR51## wherein at least one of R 6 and R 7 represents an alkyl group having 2 or more carbon atoms, and the other represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.
Claim 7
Dependent Claim
25 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material having the structural formula (IV) ##STR52##
Claim 8
Dependent Claim
25 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material having the structural formula (IV) ##STR52##
Claim 9
Dependent Claim
25 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material having the structural formula (V) ##STR53##
Claim 10
Dependent Claim
25 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photoconductive layer containing a charge transport material having the structural formula (V) ##STR53##
Claim 11
Dependent Claim
43 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said photoconductive layer is composed of a charge generating layer and a charge transport layer, the charge transport layer comprising a binder resin having dispersed therein the charge transport material represented by formula (I).
Claim 12
Dependent Claim
30 words
An electrophotographic photoreceptor as claimed in claim 6, wherein said binder resin is an ester resin selected from the group consisting of polycarbonate resins, polyester carbonate resins, and polyarylate resins.
Claim 13
Dependent Claim
37 words
An electrophotographic photoreceptor as claimed in claim 7, wherein said binder resin is a polymer blend comprising a polycarbonate resin and a polyester carbonate resin, or a polymer blend comprising a polycarbonate resin and a polyarylate resin.
Claim 14
Dependent Claim
17 words
An electrophotographic photoreceptor as claimed in claim 7, wherein said polycarbonate resins are bisphenol z polycarbonate resins.
Claim 15
Dependent Claim
105 words
A process for producing a charge transport material represented by formula (VIII) ##STR54## wherein R 8 represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, or a substituted amino group, and R 9 represents a hydrogen atom, an alkyl group, or an alkoxy group, which comprises reacting a halogenated derivative represented by formula (VI) ##STR55## wherein R 8 is as defined above, and x represents an iodine atom or a bromide atom, with a benzidine derivative represented by formula (IX) ##STR56## wherein R 9 is as defined above in the presence of a copper catalyst and an alkali.
Claim 16
Dependent Claim
105 words
A process for producing a charge transport material represented by formula (VIII) ##STR54## wherein R 8 represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, or a substituted amino group, and R 9 represents a hydrogen atom, an alkyl group, or an alkoxy group, which comprises reacting a halogenated derivative represented by formula (VI) ##STR55## wherein R 8 is as defined above, and x represents an iodine atom or a bromide atom, with a benzidine derivative represented by formula (IX) ##STR56## wherein R 9 is as defined above in the presence of a copper catalyst and an alkali.
Claim 17
Dependent Claim
18 words
A process as claimed in claim 10, wherein the reaction is carried out in a high-boiling hydrocarbon solvent.
Claim 18
Dependent Claim
67 words
An electrophotographic photoreceptor as claimed in claim 2, wherein said photoconductive layer is composed of a charge generating layer and a charge transport layer, the charge transport layer comprising a binder resin having dispersed therein the charge transport material represented by formula (II) ##STR57## wherein R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or a methyl group.
Claim 19
Dependent Claim
88 words
An electrophotographic photoreceptor as claimed in claim 3, wherein said photoconductive layer is composed of a charge generating layer and a charge transport layer, the charge transport layer comprising a binder resin having dispersed therein the charge transport material represented by formula (III) ##STR58## wherein at least one of R 6 and R 7 represents an alkyl group having 2 or more carbon atoms, and the other represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.
Claim 20
Dependent Claim
45 words
An electrophotographic photoreceptor as claimed in claim 4, wherein said photoconductive layer is composed of a charge generating layer and a charge transport layer, the charge transport layer comprising a binder resin having dispersed therein the charge transport material having the structural formula (IV) ##STR59##
Claim 21
Dependent Claim
45 words
An electrophotographic photoreceptor as claimed in claim 5, wherein said photoconductive layer is composed of a charge generating layer and a charge transport layer, the charge transport layer comprising a binder resin having dispersed therein the charge transport material having the structural formula (V) ##STR60##
References Cited (Backward Citations)
US3265496A
Cited
US4047948A
Cited
US4081274A
Cited
JPS5579450A
Cited
US4299897A
Cited
US4629671A
Cited
JPS61132955A
Cited
JPS61134354A
Cited
US4588666A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |