Electrophotographic photosensitive body

摘要

An object of the present invention is to provide an electrophotographic photosensitive body having improved electrophotographic characteristics such as sensitivity and residual potential and also having excellent durability. The present invention provides an electrophotographic photosensitive body having a layer containing at least one specific p-terphenyl compound and at least one polycarbonate resin represented by the general formula (I):;
in a mass ratio of the p-terphenyl compound to the polycarbonate resin within the range of 2:8 to 7:3.

主权项

1. An electrophotographic photosensitive body comprising a conductive support having thereon a layer comprising at least two p-terphenyl compounds selected form the following compounds (1) to (5): and at least one polycarbonate resin represented by the following general formula (I): wherein R1 and R2 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R1 and R2 may be combined to form a ring; R3, R4, R5, R6, R7, R8, R9 and R10 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a halogen atom, p and q represent a molar compositional fraction (q includes zero); a ratio of p and q has a relationship satisfying the formula 0≦q/p≦2; Z represents a substituted or unsubstituted alkylene group having from 1 to 5 carbon atoms, a substituted or unsubstituted 4,4′-biphenylene group or a divalent group represented by the following general formula (II): wherein R11 and R12 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R11 and R12 may be combined to form a ring; R13, R14, R15 and R16 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a halogen atom, and r is an integer of from 0 to 3, in a mass ratio of the p-terphenyl compounds to the polycarbonate resin within the range of 2:8 to 7:3, with the proviso that when only one kind of the polycarbonate resin is used, the case where the polycarbonate resin represented by the general formula (I) has a structure that R1 and R2 are a methyl group, R3, R4, R5, R6, R7, R8, R9 and R10 are a hydrogen atom, and q is 0 is excluded.