Layered electrophotographic recording medium comprising heterocyclic nitrogen containing organic dye compounds

US4481272A · kind A · utility

Assignee

• BASF SE

Inventors

• Albrecht Eckell · Bischofswerda, DE
• Heinz Eilingsfeld · Bischofswerda, DE
• Albert Elzer · Otterstadt, DE
• Franz Feichtmayr
• Gerhard Hoffmann · Otterstadt, DE
• Reinhold J. Leyrer · Schifferstadt, DE
• Peter Neumann · Wiesloch, DE

Key dates

• Filing date: Nov 22, 1983
• Grant date: Nov 6, 1984
• Expiry date: Nov 22, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G5/0629
• WIPO field: Optics
• WIPO sector: Instruments

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, R.sup.3 and R.sup.4 are each hydrogen or a non-ionic substituent, X and Y are each the radical of a methylene-active compound, or of an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic amine or hydrazine, and Z is hydrogen, methyl or phenyl, and the production of this recording medium.