Patent ID: 6139997
Filing Date: 2000-10-31
Classification: C09B,G03G

Abstract:
An electrophotographic photosensitive member, comprising: a support and a photosensitive layer disposed on the support; said photosensitive layer containing an azo pigment having an organic group represented by formula (1) below: ##STR27## wherein X.sub.1 is a group bonded to the benzene ring in the formula (1) to form a substituted or unsubstituted condensed hydrocarbon ring or substituted or unsubstituted condensed heterocyclic ring; each B independently denotes a hydrogen atom, halogen atom, nitro group, cyano group, carboxyl group, alkoxycarbonyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted aralkyl group, or substituted or unsubstituted alkoxy group; R.sub.1 and R.sub.2 independently denote a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a group forming a substituted or unsubstituted cyclic amino group by a combination of the groups R.sub.1 and R.sub.2 together with the nitrogen (N) atom in the formula (1); Z.sub.1 denotes an oxygen atom or sulfur atom; k.sub.1 is 0 or 1; A denotes a substituted or unsubstituted alkylene group, substituted or unsubstituted alkenylene group, --R.sub.3 --CO-- or --(CONH.paren close-st..sub.k2 ; R.sub.3 denotes a substituted or unsubstituted alkylene group; and k.sub.2 is 0 or 1 with the proviso that k.sub.1 and k.sub.2 cannot be 0 simultaneously.