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US4537847A
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Disazo photoreceptors for electrophotography
Assignee: Konica Minolta Inc
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Filing: 1984-08-10
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Granted: 1985-08-27
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Expires: 2004-08-10
Abstract
Abstract Photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer thereon, said photosensitive layer containing at least one azo compound of Formula I or II ##STR1## wherein Ar 1 , Ar 2 , Ar 3 and Ar 4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R 1 , R 2 , R 3 and R 4 each is an electron attractive group or hydrogen provided that at least one of R 1 , R 2 , R 3 and R 4 is an electron attractive group; and A is ##STR2## wherein X is a hydroxy group or a group represented by the formula: ##STR3## wherein R 6 and R 7 each is hydrogen or an alkyl group, and R 8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R 5 is hydrogen, an amino or carbamoyl group, a carboxy group or an ester group thereof; Ar 5 is an aryl group; n is an integer of 1, 2 or 3; and m is an integer of 0, 1 or 2.
Inventors
- 👤 Jiro Takahashi
- 👤 Kiyoshi Sawada
- 👤 Akira Kinoshita
- 👤 Tawara Komamura
- 👤 Satoshi Goto
- 👤 Osamu Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:31
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B56/00; C09B56/04; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/0679; G03G5/0683; G03G5/0685
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
214 words
A photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer, said photosensitive layer containing a binder and at least one azo compound of Formula I or II ##STR24## wherein Ar 1 , Ar 2 , Ar 3 and Ar 4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R 1 , R 2 , R 3 and R 4 each is an electron attractive group or hydrogen provided that at least one of R 1 , R 2 , R 3 and R 4 is an electron attractive group; and A is ##STR25## wherein X is a hydroxy group or a group represented by the formula: ##STR26## wherein R 6 and R 7 each is hydrogen or an alkyl group, and R 8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R 5 is hydrogen, an amino or carbamoyl group, a carboxy group or an ester group thereof; Ar 5 is an aryl group; n is an integer of 1,2 or 3; and m is an integer of 0, 1 or 2.
Claim 2
Dependent Claim
214 words
A photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer, said photosensitive layer containing a binder and at least one azo compound of Formula I or II ##STR24## wherein Ar 1 , Ar 2 , Ar 3 and Ar 4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R 1 , R 2 , R 3 and R 4 each is an electron attractive group or hydrogen provided that at least one of R 1 , R 2 , R 3 and R 4 is an electron attractive group; and A is ##STR25## wherein X is a hydroxy group or a group represented by the formula: ##STR26## wherein R 6 and R 7 each is hydrogen or an alkyl group, and R 8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R 5 is hydrogen, an amino or carbamoyl group, a carboxy group or an ester group thereof; Ar 5 is an aryl group; n is an integer of 1,2 or 3; and m is an integer of 0, 1 or 2.
Claim 3
Dependent Claim
20 words
A photoreceptor according to claim 1 wherein said electron attractive group is a cyano group, a nitro group or halogen.
Claim 4
Dependent Claim
33 words
A photoreceptor according to claim 1, wherein the photosensitive layer comprises a carrier transport material and a carrier generation material, said carrier generation material being an azo compound of Formula I or II.
Claim 5
Dependent Claim
29 words
A photoreceptor according to claim 3, wherein the photosensitive layer consists essentially of two layers, one containing the carrier transport material and the other containing the carrier generation material.
Claim 6
Dependent Claim
31 words
A photoreceptor according to claim 3, wherein the photosensitive layer consists essentially of a matrix containing the carrier transport material and particles of the carrier generation material dispersed in said matrix.
Claim 7
Dependent Claim
22 words
A photoreceptor according to claim 4 or 5 wherein an intermediate layer is formed between the conductive support and the photosensitive layer.
Claim 8
Dependent Claim
26 words
The photoreceptor of claim 1 wherein said azo compound is selected from the group consisting of Formulas III-1 to III-3 ##STR27## wherein A 1 is ##STR28##
Claim 9
Dependent Claim
36 words
The photoreceptor of claim 7 wherein said azo compound is selected from the group consisting of Formula IV-1 to IV-3 ##STR29## wherein Ar 6 , Ar 7 and Ar 8 is each a divalent phenyl group.
Claim 10
Dependent Claim
21 words
The photoreceptor of claim 8 wherein said azo compound is selected from the group consisting of Formula V-1 to V-3 ##STR30##
Claim 11
Dependent Claim
29 words
The photoreceptor of claim 3, 4 or 5 wherein said azo compound is selected from the group consisting of Formula III-1 to III-3 ##STR31## wherein A 1 is ##STR32##
Claim 12
Dependent Claim
36 words
The photoreceptor of claim 10 wherein said azo compound is selected from the group consisting of Formula IV-1 to IV-3 ##STR33## wherein Ar 6 , Ar 7 and Ar 8 are each a divalent phenyl group.
Claim 13
Dependent Claim
21 words
The photoreceptor of claim 11 wherein said azo compound is selected from the group consisting of Formula V-1 to V-3 ##STR34##
Claim 14
Dependent Claim
25 words
The photoreceptor of claim 6 wherein said azo compound is selected from the group consisting of III-1 to III-3 ##STR35## wherein A 1 is ##STR36##
Claim 15
Dependent Claim
37 words
The photoreceptor of claim 13 wherein said azo compound is selected from the group consisting of Formula IV-1 to IV-3 ##STR37## wherein Ar 6 , Ar 7 , and A 8 are each a divalent phenyl group.
Claim 16
Dependent Claim
21 words
The photoreceptor of claim 14 wherein said azo compound is selected from the group consisting of Formula V-1 to V-3 ##STR38##
References Cited (Backward Citations)
US4272598A
Cited
US4359513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |