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US4424266A
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Layered electrophotographic photosensitive element having hydrazone charge transport material
Assignee: Konica Minolta Inc
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Filing: 1981-09-23
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Granted: 1984-01-03
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Expires: 2001-09-23
Abstract
Abstract An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR1## wherein R 1 , R 2 , R 3 and R 4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
Inventors
- 👤 Seiji Kurihara
- 👤 Satoshi Goto
- 👤 Tsuneo Wada
- 👤 Akira Kinoshita
- 👤 Yoshiaki Takei
- 👤 Naoko Akashi
- 👤 Hiroyuki Nomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616; G03G5/0664; G03G5/0675; G03G5/0679
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
97 words
An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR9## wherein R 1 , R 2 , R 3 and R 4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
Claim 2
Dependent Claim
97 words
An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR9## wherein R 1 , R 2 , R 3 and R 4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
Claim 3
Dependent Claim
27 words
The electrophotographic photosensitive element according to claim 1, wherein said photosensitive layer comprises a carrier-transporting phase-containing layer, said carrier-generating phase being dispersed in said carrier-transporting phase-containing layer.
Claim 4
Dependent Claim
26 words
The electrophotographic photosensitive element according to claim 1 or 2, wherein said carrier-transporting phase further comprises a binder, said hydrazone compound being dispersed in said binder.
Claim 5
Dependent Claim
21 words
The electrophotographic photosensitive element according to claim 1, wherein said aryl group is a phenyl group or a substituted phenyl group.
Claim 6
Dependent Claim
20 words
The electrophotographic photosensitive element according to claim 1, wherein said arylene group is a phenylene group or a naphthylene group.
Claim 7
Dependent Claim
28 words
The electrophotographic photosensitive element according to claim 1, 3, 4 or 5, wherein said element further comprises an intermediate layer between said conductive support and said photosensitive layer.
Claim 8
Dependent Claim
16 words
An electrophotographic photosensitive element according to claim 4, wherein said arylene group is a phenylene group.
Claim 9
Dependent Claim
24 words
The electrophotographic photosensitive element according to claim 3, wherein said element further comprises an intermediate layer between said conductive support and said photosensitive layer.
Claim 10
Dependent Claim
24 words
The electrophotographic photosensitive element according to claim 1, wherein the substituent is selected from the group consisting of an alkyl group and a halogen.
Claim 11
Dependent Claim
21 words
The electrophotographic photosensitive element according to claim 7, wherein the substituent is a single substituent which is a lower alkyl group.
Claim 12
Dependent Claim
24 words
The electrophotographic photosensitive element according to claim 7, wherein the substituent is a single substituent which is a methyl group or an ethyl group.
Claim 13
Dependent Claim
20 words
The electrophotographic photosensitive element according to claim 7, wherein the substituent is a single substituent which is chlorine or bromine.
Claim 14
Dependent Claim
35 words
The electrophotographic photosensitive element according to claim 1, wherein said aryl group is phenyl and said arylene group is phenylene or naphthylene, and the substituent is a methyl group, an ethyl group, chlorine or bromine.
Claim 15
Dependent Claim
56 words
The electrophotographic photosensitive element according to claim 3, wherein said binder is selected from the group consisting of polycarbonate, polyester, methacrylic resin, acrylic resin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, styrene-butadiene copolymer, vinylidene chloride-acrylonitrile copolymer, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic anhydride copolymer, silicone resin, silicone-alkyd resin, phenol-formaldehyde resin, styrene-alkyd resin and poly-N-vinyl carbazole.
Claim 16
Dependent Claim
53 words
The electrophotographic photosensitive element according to claim 1 or 13, wherein said carrier-transporting phase further comprises a binder, said hydrazone compound being dispersed in said binder, and the ratio of said hydrazone compound and said binder is one part by weight of said hydrazone compound to 0.8-4 parts by weight of said binder.
Claim 17
Dependent Claim
56 words
The electrophotographic photosensitive element according to claim 2 or 13, wherein said carrier-transporting phase-containing layer further comprises a binder, said hydrazone compound being dispersed in said binder, and the ratio of said carrier-generating material and said binder is not more than 5 parts by weight of said binder per part by weight of said carrier-generating material.
Claim 18
Dependent Claim
38 words
The electrophotographic photosensitive element according to claim 15, wherein said layer containing said carrier-generating phase has a thickness of 0.01 to 5 microns and said layer containing said carrier-transporting phase has a thickness of 5 to 30 microns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |