US4859556A
Expired / Lapsed
US
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Electrophotographic photoconductor containing stilbene compound
Assignee: Ricoh Co Ltd
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Filing: 1988-08-09
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Granted: 1989-08-22
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Expires: 2008-08-09
Abstract
Abstract An electrophotographic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R 1 represents hydrogen or ##STR2## R 2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R 1 is hydrogen; while, when R 1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R 3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R 4 and R 5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R 4 and R 5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R 1 is hydrogen and n=0, A is ##STR7## in which R 6 is hydrogen, an alkyl group, an alkoxy group or a halogen, and R 4 and R 5 are the same as defined above.
Inventors
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/06; C07C; C07C255/00; C07D209/00; C07D209/56; C07D209/80; C07D209/82; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
122 words
An electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer formed thereon, said photosensitive layer comprising a charge transporting material and a charge generating material, said charge transporting material being an α-phenyl-stilbene derivative of the formula: ##STR524## wherein n is 0 or 1, R 2 is hydrogen, alkyl, phenyl or substituted phenyl, and A is selected from the group consisting of ##STR525## N-alkyl carbozolyl, and substituted N-alkyl carbazolyl, wherein R 3 is hydrogen, alkyl, alkoxy and halogen, and R 4 , R 5 independently represent alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and m is an integer of from 0 to 2, provided that when n is 0 and R 2 is hydrogen, R 3 is hydrogen or halogen.
Claim 2
Dependent Claim
122 words
An electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer formed thereon, said photosensitive layer comprising a charge transporting material and a charge generating material, said charge transporting material being an α-phenyl-stilbene derivative of the formula: ##STR524## wherein n is 0 or 1, R 2 is hydrogen, alkyl, phenyl or substituted phenyl, and A is selected from the group consisting of ##STR525## N-alkyl carbozolyl, and substituted N-alkyl carbazolyl, wherein R 3 is hydrogen, alkyl, alkoxy and halogen, and R 4 , R 5 independently represent alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and m is an integer of from 0 to 2, provided that when n is 0 and R 2 is hydrogen, R 3 is hydrogen or halogen.
Claim 3
Dependent Claim
40 words
An electrophotographic photoconductor as claimed in claim 1, wherein said photosensitive layer further comprises a binder agent which constitutes a charge transporting medium in combination with said α-phenylstilbene derivative; and a charge generating material dispersed within said charge transporting medium.
Claim 4
Dependent Claim
36 words
An electrophototgraphic photoconductor as claimed in claim 1, wherein said photosensitive layer comprises a charge generating layer containing a charge generating material, and a charge transporting layer containing said α-phenylstilbene derivative as a charge transporting material.
Claim 5
Dependent Claim
27 words
An electrophototgraphic photoconductor as claimed in claim 2, wherein the thickness of said phtotsensitive layer is in the range of about 3 μm to about 50 μm.
Claim 6
Dependent Claim
66 words
An electrophotographic photoconductor as claimed in claim 2, wherein the amount of said α-phenylstilbene derivative is in the range of 10 wt. % to 95 wt. % of the entire weight of said photosensitive layer, and the amount of said charge generating material is in the range of about 0.1 wt. % to about 50 wt. % of the entire weight of a said photosensitive layer.
Claim 7
Dependent Claim
42 words
An electrophotographic photoconductor as claimed in claim 3, wherein the thickness of said charge generating layer is not more than 5 μm and the thickness of said charge transporting layer is in the range of about 5 μm to about 20 μm.
Claim 8
Dependent Claim
67 words
An electrophotographic photoconductor as claimed in claim 3, wherein the amount of said charge generating material is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge generating layer, and the amount of said charge generating material is in the range of about 10 wt. % to 95 wt. % of the entire weight of said charge transporting layer.
Claim 9
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 2, wherein said charge generating material is an azo pigment having a triphenylamine skeleton.
Claim 10
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 2, wherein said charge generating material is an azo pigment having a fluorenone skeleton.
Claim 11
Dependent Claim
22 words
An electrophotographic photoconductor as claimed in claim 2, wherein said charge generating material is an azo pigment having a distyryl benzene skeleton.
Claim 12
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 3, wherein said charge generating material is an azo pigment having a triphenylamine skeleton.
Claim 13
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 3, wherein said charge generating material is an azo pigment having a fluorenone skeleton.
Claim 14
Dependent Claim
22 words
An electrophotographic photoconductor as claimed in claim 3, wherein said charge generating material is an azo pigment having a distyryl benzene skeleton.
Claim 15
Dependent Claim
16 words
An electrophotographic photoconductor as claimed in claim 1, in which A is dibenzylaminophenyl or substituted dibenzylaminophenyl.
Claim 16
Dependent Claim
16 words
An electrophotographic photoconductor as claimed in claim 1, in which A is diphenylaminophenyl or substituted diphenylaminophenyl.
Claim 17
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 1 in which R 2 is hydrogen.
Claim 18
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 1 in which R 2 is alkyl.
Claim 19
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 1 in which R 2 is phenyl.
Claim 20
Dependent Claim
31 words
An electrophotographic photoconductor as claimed in claim 16 in which A is ##STR526## and at least one of R 4 and R 5 is benzyl, ring-substituted benzyl, phenyl or ring-substituted phenyl.
Claim 21
Dependent Claim
86 words
An electrophotographic photoconductor comprising in electroconductive support material and a photosensitive layer formed thereon, said photosensitive layer comprising a charge transporting material and a charge generating material, said charge transporting material being a stilbene derivative of the formula: ##STR527## wherein R 2 represent hydrogen, alkyl, phenyl or substituted phenyl, R 4 and R 5 independently represent alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and R 6 is hydrogen, alkyl, alkoxy or halogen, provided that when R 2 is hydrogen, R 6 is hydrogen or halogen.
Claim 22
Dependent Claim
86 words
An electrophotographic photoconductor comprising in electroconductive support material and a photosensitive layer formed thereon, said photosensitive layer comprising a charge transporting material and a charge generating material, said charge transporting material being a stilbene derivative of the formula: ##STR527## wherein R 2 represent hydrogen, alkyl, phenyl or substituted phenyl, R 4 and R 5 independently represent alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and R 6 is hydrogen, alkyl, alkoxy or halogen, provided that when R 2 is hydrogen, R 6 is hydrogen or halogen.
Claim 23
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 20 in which R 2 is hydrogen.
Claim 24
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 20 in which R 2 is alkyl.
Claim 25
Dependent Claim
14 words
An electrophotographic photoconductor as claimed in claim 20 in which R 2 is phenyl.
Claim 26
Dependent Claim
27 words
An electrophotographic photoconductor as claimed in claim 21 in which at least one of R 4 and R 5 is benzyl, ring-substituted benzyl, phenyl or ring-substituted phenyl.
Claim 27
Dependent Claim
40 words
An electrophotographic photoconductor as claimed in claim 20, wherein said photosensitive layer further comprises a binder agent which constitutes a charge transporting medium in combination with said stilbene derivative; and a charge generating material dispersed within said charge transporting medium.
Claim 28
Dependent Claim
36 words
An electrophotographic photoconductor as claimed in claim 20, wherein said photosensitive layer comprises a charge generating layer containing a charge generating material, and a charge transporting layer containing said stilbene derivative as a charge transporting material.
Claim 29
Dependent Claim
27 words
An electro-photographic photoconductor as claimed in claim 25, wherein the thickness of said photosensitive layer is in the range of about 3 μm to about 50 μm.
Claim 30
Dependent Claim
65 words
An electrophotographic photoconductor as claimed in claim 25, wherein the amount of said stilbene derivative is in the range of 10 wt. % to 95 wt. % of the entire weight of said photosensitive layer, and the amount of said charge generating material is in the range of about 0.1 wt. % to about 50 wt. % of the entire weight of said photosensitive layer.
Claim 31
Dependent Claim
43 words
An electrophotographic photoconductor as claimed in claim 26, wherein the thickness of said charge generating layer is not more than about 5 μm and the thickness of said charge transporting layer is in the range of about 5 μm to about 20 μm.
Claim 32
Dependent Claim
66 words
An electrophotographic photoconductor as claimed in claim 26, wherein the amount of said charge generating layer is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge generating layer, and the amount of said charge transporting material is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge transporting layer.
Claim 33
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 25, wherein said charge generating material is an azo pigment having a triphenylamine skeleton.
Claim 34
Dependent Claim
21 words
The electrophotographic photoconductor as claimed in claim 25, wherein said charge generating material is an azo pigment having a fluorenone skeleton.
Claim 35
Dependent Claim
22 words
An electrophotographic photoconductor as claimed in claim 25, wherein said charge generating material is an azo pigment having a distyryl benzene skeleton.
Claim 36
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 26, wherein said charge generating material is an azo pigment having a triphenylamine skeleton.
Claim 37
Dependent Claim
21 words
An electrophotographic photoconductor as claimed in claim 26, wherein said charge generating material is an azo pigment having a fluorenone skeleton.
Claim 38
Dependent Claim
22 words
An electrophotographic photoconductor as claimed in claim 26, wherein said charge generating material is an azo pigment having a distyryl benzene skeleton.
Claim 39
Dependent Claim
15 words
An electrophotographic photoconductor as claimed in claim 20, wherein A is dibenzylaminophenyl or substituted dibenzylaminophenyl.
Claim 40
Dependent Claim
15 words
An electrophotographic photoconductor as claimed in claim 20, wherein A is diphenylaminophenyl or substituted diphenylaminophenyl.
Claim 41
Dependent Claim
58 words
An electrophotographic photoconductor as claimed in claim 1, in which the radiation-absorbing wavelength range of said charge generating material in the visible spectrum does not overlap the radiation-absorbing wavelength range of said charge transporting material in the visible spectrum, and said charge transporting material is transparent to radiation of said radiation-absorbing wavelength range of said charge generating material.
Claim 42
Dependent Claim
58 words
An electrophotographic photoconductor as claimed in claim 20, in which the radiation-absorbing wavelength range of said charge generating material in the visible spectrum does not overlap the radiation-absorbing wavelength range of said charge transporting material in the visible spectrum, and said charge transporting material is transparent to radiation of said radiation-absorbing wavelength range of said charge generating material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |