US5160487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic member
Assignee: Resonac Corp
•
Filing: 1991-09-04
•
Granted: 1992-11-03
•
Expires: 2011-09-04
Abstract
Abstract Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.
Inventors
- 👤 Yoshii Morishita
- 👤 Yasushi Sugimoto
- 👤 Shigeru Hayashida
- 👤 Hiroko Ishikawa
- 👤 Yoshiaki Noda
- 👤 Shigeru Murakami
- 👤 Munehiro Sato
- 👤 Yoshinori Saito
- 👤 Naoji Kurata
- 👤 Yoshio Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/43; C07C211/54; C07C211/56; C07C217/00; C07C217/78; C07C217/80; C07C217/82; C07C217/92; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
An electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative represented by the formula: ##STR90## wherein R 1 and R 2 are independently a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group, at least one of R 1 and R 2 is a fluoroalkyl group or a fluoroalkoxy group; and Ar 1 and Ar 2 are independently an aryl group which may have one or more substituents other than R 1 and R 2 .
Claim 2
Dependent Claim
85 words
An electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative represented by the formula: ##STR90## wherein R 1 and R 2 are independently a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group, at least one of R 1 and R 2 is a fluoroalkyl group or a fluoroalkoxy group; and Ar 1 and Ar 2 are independently an aryl group which may have one or more substituents other than R 1 and R 2 .
Claim 3
Dependent Claim
33 words
An electrophotographic member according to claim 1, wherein the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative of the formula (I) is contained in a photoconductive layer formed on an electroconductive support together with a charge generation material.
Claim 4
Dependent Claim
52 words
An electrophotographic member according to claim 1, wherein the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative of the formula (I) is contained in a charge transport layer, which is formed on a charge generation layer containing a charge generation material and formed on an electroconductive support, or between the charge generation layer and the electroconductive support.
Claim 5
Dependent Claim
21 words
An electrophotographic member according to claim 2, wherein an undercoating layer is present between the photoconductive layer and the electroconductive support.
Claim 6
Dependent Claim
32 words
An electrophotographic member according to claim 3, wherein an undercoating layer is present between the charge transport layer and the electroconductive support, or between the charge generation layer and the electroconductive support.
Claim 7
Dependent Claim
105 words
An electrophotographic member according to claim 1, which further comprises as a binder a polycarbonate resin having a molecular weight of 20,000 to 150,000 and represented by the formula: ##STR91## wherein R 3 and R 4 are independently a hydrogen atom, an alkyl group or an aryl group; R 5 through R 12 are independently a hydrogen atom, a halogen atom, an alkyl group or an aryl group; Z is a residue for forming a carbon ring which may have one or more substituents or a heterocyclic ring which may have one or more substituents; and n is an integer for meeting the molecular weight.
Claim 8
Dependent Claim
101 words
An electrophotographic member according to claim 1, which further comprises as a binder a polycarbonate copolymer having a molecular weight of 20,000 to 120,000 and represented by the formula: ##STR92## wherein R 3 and R 4 are independently a hydrogen atom, an alkyl group or an aryl group; R 5 through R 20 are independently a hydrogen atom, a halogen atom, an alkyl group or an aryl group; Z is a residue for forming a carbon ring which may have one or more substituents or a heterocyclic ring which may have one or more substituents; a copolymerization ratio j/m=1/10 to 10/1.
Claim 9
Dependent Claim
102 words
An electrophotographic member according to claim 1, which further comprises as a binder a polyester carbonate having a molecular weight of 20,000 to 120,000 and represented by the formula: ##STR93## wherein R 3 and R 4 are independently a hydrogen atom, an alkyl group or an aryl group; R 5 through R 12 are independently a hydrogen atom, a halogen atom, an alkyl group or an aryl group; Z is a residue for forming a carbon ring which may have one or more substituents or a heterocyclic ring which may have one or more substituents; and a copolymerization ratio j/m=1/1 to 10/1.
Claim 10
Dependent Claim
61 words
An electrophotographic member according to claim 2, wherein the charge generation material is a phthalocyanine represented by the formula: ##STR94## wherein M is H 2 and/or TiO; R 21 through R 24 are independently a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group; and k 1 through k 4 are independently an integer of 1 to 4.
Claim 11
Dependent Claim
62 words
An electrophotographic member according to claim 3, wherein the charge generation material is a photolocyanine represented by the formula: ##STR95## wherein M is H 2 and/or TiO; R 21 through R 24 are independently a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group; and k 1 and through k 4 are independently an integer of 1 to 4.
Claim 12
Dependent Claim
18 words
An electrophotographic member according to claim 10, which further comprises as a charge generation material a polyester resin.
Claim 13
Dependent Claim
19 words
An electrophotographic member according to claim 10, which further comprises as a charge generation material a polyvinyl acetal resin.
Claim 14
Dependent Claim
41 words
An electrophotographic member according to claim 3, wherein the charge generation material is β-form titanyl phtalocyanine which shows strong diffraction peaks at Bragg angles (20±0.2°) of 9.3°, 10.6°, 13.2°, 15.1°, 15.7°, 16.1°, 20.8°, 23.3°, 26.3° and 27.1° in X-ray diffraction pattern.
Claim 15
Dependent Claim
32 words
An electrophotographic member according to claim 13, which further comprises as a binder a polycarbonate resin having a molecular weight of 20,000 to 150,000 and represented by the formula (II) or (III).
References Cited (Backward Citations)
US3935230A
Cited
US4933245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |