Electrophotographic photosensitive member, and electrophotographic apparatus, device unit and facsimile machine employing the photosensitive member

摘要

An electrophotographic photosensitive member has an electroconductive substrate and a photosensitive layer formed thereon. The photosensitive layer contains an acetal resin having a component unit represented by the following formula (1): (* CHEMICAL STRUCTURE *) (1) wherein X is (* CHEMICAL STRUCTURE *) R1 is a substituted or unsubstituted aryl group and a substituted or unsubstituted heterocyclic group; R2 is a hydrogen atom and a substituted or unsubstituted alkyl group; R3 is a substituted or unsubstituted alkyl group; A is a substituted or unsubstituted heterocyclic group and (* CHEMICAL STRUCTURE *) R4 is a substituted or unsubstituted heterocyclic group; R5 is a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group and a substituted or unsubstituted heterocyclic group; and n and m are each 0, 1, 2 and 3.