US4436800A
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Multilayer electrophotographic element containing a trisazo charge carrier generating substance and a hydrazone charge carrier transfer substance
Assignee: Ricoh Co Ltd
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Filing: 1982-05-19
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Granted: 1984-03-13
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Expires: 2002-05-19
Abstract
Abstract An electrophotographic element comprising an electrically conductive substrate, a charge carrier generating layer and a charge transfer layer superimposed on said substrate, wherein said charge carrier generating layer contains a trisazo compound having the general formula (I): ##STR1## (wherein, Ar 1 represents a substituted or unsubstituted phenyl radical and said charge transfer layer contains a hydrazone compound having the general formula (II), (III), (IV), or (V): ##STR2## (wherein, R 1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R 2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R 3 represents hydrogen, chlorine, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group.), ##STR3## (wherein, Ar 2 represents a naphthalene ring, an anthracene ring, a styryl group and their substituents, or a pyridine ring, a furan ring or a thiophene ring, and R 4 represents an alkyl group or a benzyl group.), ##STR4## (wherein, R 5 , R 6 , R 7 and R 8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a dialkyl group or a dibenzylamino group, and R 9 represents an alkyl group or a benzyl group.), ##STR5## (wherein, R 10 , R 11 , R 12 and R 13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom.), and a binder.
Inventors
- 👤 Masafumi Ohta
- 👤 Kiyoshi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:39
CPC Classifications
C; C09; C09B; C09B26/00; C09B26/02; C09B35/00; C09B35/378; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0687; G03G5/0688
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
277 words
An electrophotographic element comprising an electrically conductive substrate, a charge carrier generating layer and a charge transfer layer superimposed on said substrate, wherein said charge carrier generating layer contains a trisazo compound having the general formula (I): ##STR134## wherein, Ar 1 represents ##STR135## and said charge transfer layer contains a hydrazone compound having the general formula (II), (III), (IV) or (V): ##STR136## wherein, R 1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R 2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R 3 represents hydrogen, chlorine, bromine, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group, ##STR137## wherein Ar 2 represents a naphthalene ring, a substituted napthalene ring, an anthracene ring, a substituted anthracene ring, a styryl group, a substituted styryl group, a pyridine ring, a furan ring or a thiophene ring, and R 4 represents an alkyl group or a benzyl group, ##STR138## wherein, R 5 , R 6 , R 7 and R 8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a dialkylamino group or a dibenzylamino group, and R 9 represents an alkyl group or a benzyl group, ##STR139## wherein, R 10 , R 11 , R 12 , and R 13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom, and a binder.
Claim 2
Dependent Claim
277 words
An electrophotographic element comprising an electrically conductive substrate, a charge carrier generating layer and a charge transfer layer superimposed on said substrate, wherein said charge carrier generating layer contains a trisazo compound having the general formula (I): ##STR134## wherein, Ar 1 represents ##STR135## and said charge transfer layer contains a hydrazone compound having the general formula (II), (III), (IV) or (V): ##STR136## wherein, R 1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R 2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R 3 represents hydrogen, chlorine, bromine, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group, ##STR137## wherein Ar 2 represents a naphthalene ring, a substituted napthalene ring, an anthracene ring, a substituted anthracene ring, a styryl group, a substituted styryl group, a pyridine ring, a furan ring or a thiophene ring, and R 4 represents an alkyl group or a benzyl group, ##STR138## wherein, R 5 , R 6 , R 7 and R 8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a dialkylamino group or a dibenzylamino group, and R 9 represents an alkyl group or a benzyl group, ##STR139## wherein, R 10 , R 11 , R 12 , and R 13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom, and a binder.
Claim 3
Dependent Claim
35 words
An electrophotographic element as claimed in claim 1 wherein the charge carrier generating layer is interposed between the charge transfer layer and the electrically conductive substrate, and the charge transfer layer forms an exposed surface.
Claim 4
Dependent Claim
31 words
An electrophotographic element as claimed in claim 1 wherein the charge carrier generating layer is 0.01 to 5 μm thick, and the charge transfer layer is 2 to 100 μm thick.
Claim 5
Dependent Claim
45 words
An electrophotographic element as claimed in claim 1 wherein the charge carrier generating layer contains the trisazo compound in a quantity of 10 to 100% by weight, and the charge transfer layer contains the hydrazone compound in a quantity of 10 to 80% by weight.
Claim 6
Dependent Claim
48 words
An electrophotographic element as claimed in claim 4 wherein the charge carrier generating layer contains at least one kind of binder selected from the group consisting of polyester resin, butyral resin, ethyl cellulose resin, epoxy resin, acryl resin, vinylidene chloride resin, polystyrene resin, polybutadiene resin and their copolymers.
Claim 7
Dependent Claim
24 words
An electrophotographic element as claimed in claim 1 containing in the charge carrier generating layer the trisazo compound wherein said Ar 1 represents ##STR140##
Claim 8
Dependent Claim
23 words
An electrophotographic element as claimed in claim 1 containing in the charge carrier generating layer the trisazo compound wherein Ar 1 represents ##STR141##
Claim 9
Dependent Claim
23 words
An electrophotographic element as claimed in claim 1 containing in the charge carrier generating layer the trisazo compound wherein Ar 1 represents ##STR142##
Claim 10
Dependent Claim
23 words
An electrophotographic element as claimed in claim 1 containing in the charge carrier generating layer the trisazo compound wherein Ar 1 represents ##STR143##
Claim 11
Dependent Claim
23 words
An electrophotographic element as claimed in claim 1 containing in the charge carrier generating layer the trisazo compound wherein Ar 1 represents ##STR144##
Claim 12
Dependent Claim
94 words
An electrophotographic element as claimed in claim 1, 6, 7, 8, 9 or 10 containing in the charge transfer layer the hydrazone compound having the general formula (II): ##STR145## wherein, R 1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R 2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R 3 represents hydrogen, chlorine, bromine, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group.
Claim 13
Dependent Claim
73 words
An electrophotographic element as claimed in claim 1, 6, 7 or 8 containing in the charge transfer layer the hydrazone compound having the general formula (III): ##STR146## wherein, Ar 2 represents a naphthalene ring, a substituted napthalene ring, an anthracene ring, a substituted anthracene ring, a styryl group, a substituted styryl group, a pyridine ring, a furan ring or a thiophene ring, and R 4 represents an alkyl group or a benzyl group.
Claim 14
Dependent Claim
80 words
An electrophotographic element as claimed in claim 1, 6, 7, 8, 9 or 10 containing in the charge transfer layer the hydrazone compound having the general formula (IV): ##STR147## wherein, R 5 , R 6 , R 7 and R 8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a dialkylamine group or a dibenzylamino group, and R 9 represents an alkyl group or a benzyl group.
Claim 15
Dependent Claim
75 words
An electrophotographic element as claimed in claim 1, 6, 7, 8, 9 or 10 containing in the charge transfer layer the hydrazone compound having the general formula (V): ##STR148## wherein, R 10 , R 11 , R 12 and R 13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom.
Claim 16
Dependent Claim
24 words
An electrophotographic element as claimed in claim 6 wherein the charge transfer layer contains one hydrazone compound selected from the group consisting of: ##STR149##
Claim 17
Dependent Claim
24 words
An electrophotographic element as claimed in claim 8 wherein the charge transfer layer contains one hydrazone compound selected from the group consisting of: ##STR150##
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |