Patent ID: 6265123
Filing Date: 2001-07-24
Classification: G03G

Abstract:
An electrophotographic photosensitive element comprising a photosensitive layer containing a charge generating substance and a charge transporting substance on a conductive support,wherein X-type metal-free phthalocyanine and a disazo compound are contained as the charge generating substance,said disazo compound being represented by following general formula (1), ##STR7##where A and B respectively correspond to any one of coupler remained groups represented by following general formulas (2)-(7), and A and B can also serve as coupler remained groups having the same construction, ##STR8##where X.sub.1 represents a hydrogen atom or CONHR (R represents a hydrogen atom, an alkyl group, which is allowed to have a substituent, an aryl group, or a heterocyclic group); Z represents a remained group which is condensed with a benzene ring so as to form an aromatic ring or an aromatic heterocycle; X.sub.2 and X.sub.5 independently represent an alkyl group, which is allowed to have a substituent, an aryl group, or a heterocyclic group; X.sub.3 and X.sub.6 independently represent a hydrogen atom, a cyano group, a carbamoyl group, a carboxyl group, ester group, or an acyl group; X.sub.4 and X.sub.9 independently represent a hydrogen atom, an alkyl group, which is allowed to have a substituent, a cycloalkyl group, an alkenyl group, an aralkyl group, an aryl group, or a heterocyclic group; X.sub.7 and X.sub.8 independently represent a hydrogen atom, a halogen group, a nitro group, an alkyl group, which is allowed to have a substituent, and an alkoxy group; and Y represents a remained group forming an aromatic hetrocycle.