US4923774A
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Layered electrophotographic recording element comprising p-type charge transport compounds
Assignee: Agfa Gevaert NV
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Filing: 1989-06-16
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Granted: 1990-05-08
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Expires: 2009-06-16
Abstract
Abstract An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge transport capacity and corresponds to the following general formula (I): ##STR1## wherein: R 1 represents a --NR 3 R 4 group, wherein each of R 3 and R 4 (same or different) represents a C 1 -C 10 alkyl group including said alkyl group in substituted form, a cycloalkyl group, or an aryl group, and R 2 represents hydrogen, an alkyl group including a substituted alkyl group or halogen.
Inventors
- 👤 Mark G. Van der Auweraer
- 👤 Frans C. De Schrijver
- 👤 Guy P. Verbeek
- 👤 Carina Geelen
- 👤 David R. Terrell
- 👤 Stefaan K. De Meutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge transport capacity and corresponds to the following general formula (I): ##STR23## wherein: R 1 represents a --NR 3 R 4 group, wherein each of R 3 and R 4 (same or different) represents a C 1 -C 10 alkyl group, a cycloalkyl group, or an aryl group, and R 2 represents hydrogen, an alkyl group or halogen.
Claim 2
Dependent Claim
77 words
An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge transport capacity and corresponds to the following general formula (I): ##STR23## wherein: R 1 represents a --NR 3 R 4 group, wherein each of R 3 and R 4 (same or different) represents a C 1 -C 10 alkyl group, a cycloalkyl group, or an aryl group, and R 2 represents hydrogen, an alkyl group or halogen.
Claim 3
Dependent Claim
39 words
An electrophotographic recording material according to claim 1, wherein said material comprises a charge generating layer in contiguous relationship with a charge transporting layer, and said charge transporting layer contains said photoconductive compound according to said general formula (I).
Claim 4
Dependent Claim
20 words
An electrophotographic recording material according to claim 1, wherein R 2 represents methyl, ethyl or an ethoxycarbonyl substituted alkyl group.
Claim 5
Dependent Claim
25 words
An electrophotographic recording material according to claim 1, wherein each of R 3 and R 4 (same or different) represents benzyl or alkoxycarbonyl substituted alkyl.
Claim 6
Dependent Claim
25 words
An electrophotographic recording material according to claim 1, wherein the compound according to general formula (I) has a melting point of at least 100° C.
Claim 7
Dependent Claim
46 words
An electrophotographic recording material according to claim 2, wherein a compound according to general formula (I) is applied in combination with a resin binder to form a charge transporting layer adhering directly to said positive charge generating layer being itself carried by an electrically conductive support.
Claim 8
Dependent Claim
70 words
An electrophotographic recording material according to claim 6, wherein the resin binder or binders is (are) selected from the group consisting of a cellulose ester, acrylate and methacrylate resins, polyvinyl chloride, copolymers of vinyl chloride, polyester resins, aromatic polycarbonate resins, silicone resins, polystyrene and copolymers of styrene and maleic anhydride, copolymers of butadiene and styrene, poly-N-vinylcarbazole and copolymers of N-vinylcarbazole having a N-vinylcarbazole content of at least 40% by weight.
Claim 9
Dependent Claim
43 words
An electrophotographic recording material according to claim 2, wherein the content of said compound according to general formula (I) in the charge transporting layer is in the range of 30 to 70 by weight with respect to the total weight of said layer.
Claim 10
Dependent Claim
25 words
An electrophotographic recording material according to claim 8, wherein the thickness of said charge transporting layer is in the range of 5 to 50 μm.
Claim 11
Dependent Claim
78 words
An electrophotographic recording material according to claim 2, wherein the positive charge generating layer contains for photo-induced electron-positive hole pair formation an organic substance selected from the group consisting of: (a) perylimides, (b) polynuclear quinones, (c) quinacridones, (d) naphthalene 1,4,5,8 tetracarboxylic acid derived pigments, (e) phthalocyanines, (g) benzothioxanthene-derivatives, (h) perylene 3,4,9,10-tetracarboxylic acid derived pigments, (i) polyazo pigments, and (j) squarilium dyes. (k) polymethine dyes. (l) dyes containing quinazoline groups, (m) triarylmethane dyes, and (n) dyes containing 1,5-diamino-anthraquinone groups.
Claim 12
Dependent Claim
48 words
An electrophotographic recording material according to claim 1, wherein the conductive support is made of aluminum, steel, brass or paper or resin material incorporating or being coated with a conductivity enhancing substance, the support being in the form of a foil, web or being part of a drum.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
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