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US4803140A
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Electrophotographic photosensitive member
Assignee: Canon Inc
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Filing: 1987-10-15
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Granted: 1989-02-07
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Expires: 2007-10-15
Abstract
Abstract An electrophotographic photosensitive member comprises a photosensitive layer on an electroconductive substrate, said photosensitive layer containing a polymer formed from a polymerizable monomer having, in the side chain, an aromatic ring substituted with fluorine atom as the constituent.
Inventors
- 👤 Masaaki Hiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:31
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0532; G03G5/0546; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22; C08F20/52; C08F20/54; C08F20/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
An electrophotographic photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer having a laminated structure comprising a charge generation layer containing an organic photoconductive charge generation material and a charge transport layer containing an organic charge transport material having aromatic rings in the molecule, said charge transport layer being coated on the charge generation layer said charge transport layer containing a polymer formed from a polymerizable monomer having, in the side chain, an aromatic ring substituted with fluorine atom as the constituent.
Claim 2
Dependent Claim
86 words
An electrophotographic photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer having a laminated structure comprising a charge generation layer containing an organic photoconductive charge generation material and a charge transport layer containing an organic charge transport material having aromatic rings in the molecule, said charge transport layer being coated on the charge generation layer said charge transport layer containing a polymer formed from a polymerizable monomer having, in the side chain, an aromatic ring substituted with fluorine atom as the constituent.
Claim 3
Dependent Claim
67 words
An electrophotographic photosensitive member according to claim 1, wherein said fluorine atom containing polymer contains a monomer selected from the polymerizable monomers shown by the formulae (I) and (II) shown below: ##STR5## wherein R 1 represents hydrogen atom or methyl group; R 2 represents hydrogen atom, halogen atom, alkyl group, alkoxy group, nitrile group or a combination thereof; and n represents an integer of 1 to 4.
Claim 4
Dependent Claim
36 words
An electrophotographic photosensitive member according to claim 1, wherein said fluorine atom containing polymer contains 5 wt. % or more of the polymerizable monomer having, in the side chain, the aromatic ring substituted with fluorine atom.
Claim 5
Dependent Claim
111 words
An electrophotographic photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer having a laminated structure comprising a charge generation layer containing an organic photoconductive charge generation material and a charge transport layer containing a hydrazone as an organic charge transport material; wherein said charge transport layer or said charge generation layer additionally contains a fluorine atom containing a polymer formed from a polymerizable monomer of Formulae (I) or (II) shown below: ##STR6## wherein R 1 represents hydrogen atom or methyl group; R 2 represents hydrogen atom, halogen atom, alkyl group, alkoxy group, nitrile group or a combination thereof; and n represents an integer of 1 to 4.
Claim 6
Dependent Claim
111 words
An electrophotographic photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer having a laminated structure comprising a charge generation layer containing an organic photoconductive charge generation material and a charge transport layer containing a hydrazone as an organic charge transport material; wherein said charge transport layer or said charge generation layer additionally contains a fluorine atom containing a polymer formed from a polymerizable monomer of Formulae (I) or (II) shown below: ##STR6## wherein R 1 represents hydrogen atom or methyl group; R 2 represents hydrogen atom, halogen atom, alkyl group, alkoxy group, nitrile group or a combination thereof; and n represents an integer of 1 to 4.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |