Electrophotographic recording material comprising a pyrazoline derivative

US4762760A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Wiedemann · Geisenheim, DE
• Michael Drexler · Gehrden, DE
• Juergen Fuerderer · Mainz, DE

Key dates

• Filing date: Jan 29, 1987
• Grant date: Aug 9, 1988
• Expiry date: Jan 29, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G5/0631
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrophotographic recording material is comprised of an electrically conducting film base, an optional, adhesion-promoting, insulating intermediate film and at least one binder-containing photoconductive film that also contains a charge-carrier generating compound and pyrazoline charge-transporting compound represented by the formula ##STR1## in which n denotes zero or 1 and PA1 R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 respectively denote hydrogen or halogen, preferably chlorine or bromine. Such a recording material has a low pre-exposure sensitivity combined with very good photosensitivity, and a low residual charge level in cyclic behavior. The charge-transporting compound has a low tendency to crystallize out in the film.