EP0061092B1
Expired / Lapsed
EP
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Electrophotographic recording material
Assignee: BASF SE
•
Filing: 1982-03-12
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Granted: 1983-12-21
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Expires: 2002-03-12
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Dr. Hoffmann
- 👤 Fritz Dr. Graser
- 👤 Reinhold J. Dr. Leyrer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:45
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0657; G03G5/0659
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
An electrophotographic recording medium which consists essentially of (a) an electrically conductive base, (b) a first layer containing a charge carrier-producing dye of the general formula (I) or (II) where R 1 is hydrogen, alkyl, aralkyl, aryl or alkylaryl, and Z, where relevant, is a fused aromatic system, and (c) a second layer which is substantially transparent to actinic light and is composed of insulating organic materials containing at least one compound which is charge carrier-transporting when exposed to light, wherein the degree of halogen substitution, based on the aromatic skeleton of the general formula (I) or (II), is from 45 to 75% of the maximum possible.
Claim 2
Dependent Claim
107 words
An electrophotographic recording medium which consists essentially of (a) an electrically conductive base, (b) a first layer containing a charge carrier-producing dye of the general formula (I) or (II) where R 1 is hydrogen, alkyl, aralkyl, aryl or alkylaryl, and Z, where relevant, is a fused aromatic system, and (c) a second layer which is substantially transparent to actinic light and is composed of insulating organic materials containing at least one compound which is charge carrier-transporting when exposed to light, wherein the degree of halogen substitution, based on the aromatic skeleton of the general formula (I) or (II), is from 45 to 75% of the maximum possible.
Claim 3
Dependent Claim
41 words
An electrophotographic recording medium as claimed in claim 1, wherein the charge carrier-producing dye of the formula (I) is a chlorinated perylene-3,4:9,10-tetracarboxylic acid N,N'-dimethyldiimide with a degree of chlorination of the aromatic skeleton of about 66% of the maximum possible chlorination.
Claim 4
Dependent Claim
41 words
An electrophotographic recording medium as claimed in claim 1, wherein the charge carrier-producing dye of the formula (II) is a chlorinated perylene-3,4:9,10-tetracarboxylic acid bis-benzimidazole with a degree of chlorination of the aromatic skeleton of about 56% of the maximum possible chlorination.
Claim 5
Dependent Claim
33 words
An electrophotographic recording medium as claimed in claim 1, wherein in the second layer, which is substantially transparent to actinic light, the compound which is charge carrier-transporting when exposed to light is poly-(N-vinylcarbazole).
Claim 6
Dependent Claim
115 words
A process for the production of an electrophotographic recording medium as claimed in claim 1, wherein there is applied to (a) an electrically conductive base (b) a first layer of a dispersion containing a charge carrier-producing dye, with or without insulating organic binder, in such a thickness that a 0.005-5 µm thick layer is obtained after drying, and (c) a solution of an insulating organic material which is charge carrier-transporting when exposed to light, with or without other insulating organic materials which are completely compatible with one another in solution and in the dry film, is applied to the dried first layer, to form a second layer which is 2 -40 11m thick when dry.
Claim 7
Dependent Claim
17 words
The use of an electrophotographic recording material as claimed in claims 1 and 5 for reprographic purposes.
References Cited (Backward Citations)
No citation records indexed.
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