Electrophotographic medium with heterocyclic azo photoconductor

US4396695A · kind A · utility

Assignee

• BASF SE

Inventors

• Manfred Dimmler · Schifferstadt, DE
• Gerhard Hoffmann · Otterstadt, DE
• Dieter Buhl · Bischofswerda, DE

Key dates

• Filing date: Mar 16, 1982
• Grant date: Aug 2, 1983
• Expiry date: Mar 16, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An electrophotographic recording medium which consists essentially of an electrically conductive base and a photosemiconductive double layer which comprises a first layer containing charge carrier-producing dyes, and a second layer containing one or more compounds which are charge carrier-transporting when exposed to light, wherein the charge carrier-producing dyes are those of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, halogen, alkyl, nitro or cyano, R.sup.4 is phenyl, halophenyl, alkylphenyl, nitrophenyl or dialkylaminophenyl, and X is oxygen, sulfur, NH or N-phenyl, and the production of this recording medium.