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US4535044A
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Photosensitive material for electrophotography containing photosensitive layer incorporating pentakisazo pigment
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1983-05-09
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Granted: 1985-08-13
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Expires: 2003-05-09
Abstract
Abstract Disclosed is a photosensitive material for electrophotography containing a pentakisazo pigment of the following formula: ##STR1## wherein the rings A 1 and A 2 may have halogen atoms, alkyl groups or alkoxy groups as substituents at the ortho-positions to the azo groups, the ring B may have a halogen atom, an alkyl group or an alkoxy group as a substituent or may contain the ring Z 1 , Z 1 which is an aromatic or hetero ring fused to the benzene ring B, and Y stands for a group of the following formula: ##STR2## in which Z 2 stands for an aromatic ring or a hetero ring, Ar 1 stands for an aromatic ring or a hetero ring, Ar 2 and Ar 3 stand for an aromatic ring, R 0 stands for a hydrogen atom, a lower alkyl group or a phenyl group, R 1 stands for a lower alkyl group, a carboxyl group or an ester thereof, and R 2 and R 3 stand for a hydrogen atom, a lower alkyl group, a phenyl group or a substituted derivative thereof.
Inventors
- 👤 Teruaki Higashiguchi
- 👤 Nobuhiro Miyakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0694; C; C09; C09B; C09B33/00; C09B33/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
214 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing as a charge-generating pigment a pentakisazo pigment represented by the following formula: ##STR19## wherein the rings A 1 and A 2 may have halogen atoms, alkyl groups or alkoxy groups as substitutents at the ortho-positions to the azo groups, the ring B may have a halogen atom, an alkyl group or an alkoxy group as a substituent or may contain the ring Z 1 , Z 1 selected from the group consisting of an aromatic or hetero ring fused to the benzene ring B, or a substituted derivative thereof and Y stands for a group selected from a group represented by the following formula: ##STR20## in which Z 2 is an aromatic ring, a carbozole ring or a benzofuran ring or a substituted derivative thereof, Ar 1 is an aromatic ring, a hetero ring or a substituted derivative thereof, Ar 2 and Ar 3 is an aromatic ring or a substituted derivative thereof, R 0 is a hydrogen atom, a lower alkyl group or a phenyl group, R 1 is a lower alkyl group, a carboxyl group or an ester thereof, and R 2 and R 3 is a hydrogen atom, a lower alkyl group, a phenyl group or a substituted derivative thereof.
Claim 2
Dependent Claim
214 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing as a charge-generating pigment a pentakisazo pigment represented by the following formula: ##STR19## wherein the rings A 1 and A 2 may have halogen atoms, alkyl groups or alkoxy groups as substitutents at the ortho-positions to the azo groups, the ring B may have a halogen atom, an alkyl group or an alkoxy group as a substituent or may contain the ring Z 1 , Z 1 selected from the group consisting of an aromatic or hetero ring fused to the benzene ring B, or a substituted derivative thereof and Y stands for a group selected from a group represented by the following formula: ##STR20## in which Z 2 is an aromatic ring, a carbozole ring or a benzofuran ring or a substituted derivative thereof, Ar 1 is an aromatic ring, a hetero ring or a substituted derivative thereof, Ar 2 and Ar 3 is an aromatic ring or a substituted derivative thereof, R 0 is a hydrogen atom, a lower alkyl group or a phenyl group, R 1 is a lower alkyl group, a carboxyl group or an ester thereof, and R 2 and R 3 is a hydrogen atom, a lower alkyl group, a phenyl group or a substituted derivative thereof.
Claim 3
Dependent Claim
28 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer is composed of a dispersion of the pentakisazo pigment in an electrically insulating binder medium.
Claim 4
Dependent Claim
33 words
A photosensitive material as set forth in claim 2, wherein the pentakisazo pigment is present in an amount of 5 to 100 parts by weight per 100 parts by weight of the binder.
Claim 5
Dependent Claim
32 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer is composed of a dispersion of the pentakisazo pigment as the charge generating pigment in a charge transport substance.
Claim 6
Dependent Claim
35 words
A photosensitive material as set forth in claim 4, wherein the pentakisazo pigment is present in an amount of 1 to 30 parts by weight per 100 parts by weight of the whole photosensitive layer.
Claim 7
Dependent Claim
41 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer comprises a charge generating layer containing the pentakisazo pigment formed on an electroconductive substrate and a layer of a charge transport substance formed on the charge generating layer.
Claim 8
Dependent Claim
35 words
A photosensitive material as set forth in claim 6, wherein the charge generating layer has a thickness of 0.1 to 3 microns and the charge transport layer has a thickness of 5 to 30 microns.
Claim 9
Dependent Claim
17 words
The photosensitive material of claim 1, wherein Y stands for a group represented by the formula: ##STR21##
Claim 10
Dependent Claim
16 words
The photosensitive material of claim 8, wherein Y is selected from the group consisting of ##STR22##
Claim 11
Dependent Claim
16 words
The photosensitive material of claim 1, wherein Y is the group represented by the formula ##STR23##
Claim 12
Dependent Claim
16 words
The photosensitive material of claim 10, wherein Y is selected from the group consisting of ##STR24##
Claim 13
Dependent Claim
16 words
The photosensitive material of claim 1, wherein Y is the group represented by the formula ##STR25##
Claim 14
Dependent Claim
16 words
The photosensitive material of claim 12, wherein Y is selected from the group consisting of ##STR26##
Claim 15
Dependent Claim
134 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing as a charge-generating pigment a pentakisazo pigment represented by the following formula: ##STR27## wherein the rings A 1 and A 2 may have halogen atoms, alkyl groups or alkoxy groups as substituents at the ortho-positions to the azo groups, the ring B may have a halogen atom, an alkyl group or an alkoxy group as a substitutent or may contain the ring Z 1 , Z 1 is an aromatic or hetero ring fused to the benzene ring B, or a substituted derivative thereof and Y is a group represented by the following formula: ##STR28## in which Ar 2 is an aromatic ring or a substituted derivative thereof, and R 1 is a lower alkyl group, a carboxyl group, or an ester thereof.
Claim 16
Dependent Claim
134 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing as a charge-generating pigment a pentakisazo pigment represented by the following formula: ##STR27## wherein the rings A 1 and A 2 may have halogen atoms, alkyl groups or alkoxy groups as substituents at the ortho-positions to the azo groups, the ring B may have a halogen atom, an alkyl group or an alkoxy group as a substitutent or may contain the ring Z 1 , Z 1 is an aromatic or hetero ring fused to the benzene ring B, or a substituted derivative thereof and Y is a group represented by the following formula: ##STR28## in which Ar 2 is an aromatic ring or a substituted derivative thereof, and R 1 is a lower alkyl group, a carboxyl group, or an ester thereof.
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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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |