Electrophotographic photosensitive member, method of producing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

摘要

Provided is an electrophotographic photosensitive member, including a charge-transporting layer containing a charge-transporting substance, and containing, as resins, a polycarbonate resin A having specific structural units and a resin D having a specific structural unit, in which the charge-transporting layer has, in a matrix containing the charge-transporting substance and the resin D, domains each containing the polycarbonate resin A.

主权项

1. An electrophotographic photosensitive member comprising:
a support; a charge-generating layer on the support; and a charge-transporting layer on the charge-generating layer, wherein: the charge-transporting layer is a surface layer of the electrophotographic photosensitive member; the charge-transporting layer comprises a matrix-domain structure having:
a domain which comprises a polycarbonate resin A comprising:
a structural unit represented by one of the following formulae (A-1) and (A-2);a structural unit represented by the following formula (B); anda structural unit represented by the following formula (C); anda matrix which comprises a charge-transporting substance and a resin D having a structural unit represented by the following formula (D); a content of the structural unit represented by one of the formulae (A-1) and (A-2) is from 5% by mass to 25% by mass based on a total mass of the polycarbonate resin A; a content of the structural unit represented by the formula (B) is from 35% by mass to 65% by mass based on the total mass of the polycarbonate resin A; a content of the structural unit represented by the formula (C) is from 10% by mass to 60% by mass based on the total mass of the polycarbonate resin A,in the formula (A-1):
Z11 and Z12 each independently represent an alkylene group having 1 to 4 carbon atoms; R11 to R14 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group; and n11 represents a number of repetitions of a structure within parentheses, and an average of n11 in the formula (A-1) ranges from 10 to 150;in the formula (A-2):
Z21 to Z23 each independently represent an alkylene group having 1 to 4 carbon atoms; R16 to R27 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group; and n21, n22, and n23 each independently represent a number of repetitions of a structure within parentheses, an average of n21 and an average of n22 in the formula (A-2) each range from 1 to 10, and an average of n23 in the formula (A-2) ranges from 10 to 200;in the formula (C):
Y31 represents an oxygen atom or a sulfur atom; and R31 to R34 each independently represent a hydrogen atom or a methyl group;in the formula (D):
m41 represents 0 or 1; when m41 represents 1, X41 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom; Y41 represents a single bond, an oxygen atom, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, or a phenylethylidene group; and R41 to R48 each independently represent a hydrogen atom or a methyl group.