Patent ID: 8980508
Filing Date: 2015-03-17
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member, comprising: a support, a charge-generating layer which is provided on the support and comprises a charge-generating substance, and a charge-transporting layer which is provided on the charge-generating layer and is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a domain which comprises the constituent α, and a matrix which comprises the constituent β and a charge-transporting substance; wherein the constituent γ is a polycarbonate resin A having a repeating structural unit represented by the following formula (A), a repeating structural unit represented by the following formula (B) and a repeating structural unit represented by the following formula (C), the content of a siloxane moiety in the polycarbonate resin A is not less than 5% by mass and not more than 40% by mass relative to the total mass of the polycarbonate resin A, the content of the repeating structural unit represented by the formula (B) is not less than 10% by mass and not more than 30% by mass relative to the total mass of the polycarbonate resin A, and the content of the repeating structural unit represented by the formula (C) is not less than 25% by mass and less than 85% by mass relative to the total mass of the polycarbonate resin A; wherein, in the formula (A), “n” represents number of repetitions of a structure within the bracket, an average of “n” in the polycarbonate resin A ranges from 20 to 60; wherein, in the formula (B), Y represents an oxygen atom or a sulfur atom; wherein the constituent β is a polyester resin D having a repeating structural unit represented by the following formula (D); wherein, in the formula (D), R X represents a meta-phenylene group, a para-phenylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, and Y represents a single bond, a methylene group, an ethylidene group, or a propylidene group.