Perylene tetracarboxylic acid imide pigments in an electrophotographic recording material

US4714666A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Wiedemann · Geisenheim, DE
• Ernst Spietschka · Idstein, DE
• Helmut Troester · Mannheim, DE

Key dates

• Filing date: Jul 23, 1986
• Grant date: Dec 22, 1987
• Expiry date: Jul 23, 2006

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G5/0657
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrophotographic recording material comprises an electrically conductive base material, an optional insulating intermediate layer and a photoconductive layer comprising at least one layer containing an asymmetrically substituted perylene-3,4,9,10-tetracarboxylic acid imide as charge carrier producing compound, a photoconductor as charge transport compound, binder and customary additives. The asymmetrically substituted perylene-3,4,9,10-tetracarboxylic acid imide can, for example, be represented by the formula ##STR1## where R denotes hydrogen, alkyl, hydroxyalky, alkoxyalkyl, aryl or aralkyl and A denotes phenylene, naphthylene or a more highly fused aromatic carbocylic or heterocyclic radical which can each be substituted by halogen, alkyl, cyano or nitro groups. This material is suitable in double-layer arrangement for highly light sensitive systems, and in a single layer for preparing printing forms or printed circuits.