Patent ID: 8980509
Filing Date: 2015-03-17
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member, comprising: a conductive support, a charge-generating layer which is provided on the conductive 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 a polyester resin A having a repeating structural unit represented by the following formula (A) and a repeating structural unit represented by the following formula (B); and a matrix which comprises, at least one resin selected from the group consisting of a polycarbonate resin C having a repeating structural unit represented by the following formula (C) and a polyester resin D having a repeating structural unit represented by the following formula (D), and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (1′), a compound represented by the following formula (2), and a compound represented by the following formula (2′); wherein the content of a siloxane moiety in the polyester resin A is not less than 5.0% by mass and not more than 40% by mass relative to the total mass of the polyester resin A; wherein, in the formula (A), Y X W wherein, in the formulae (a) and (b), R R “n” represents the number of repetitions of a structure within brackets, an average of “n” in the polyester resin A ranges from 10 to 150; “m” and “k” each independently represents the number of repetitions of a structure within brackets, an average of “m+k” in the polyester resin A ranges from 10 to 150; wherein, in the formula (B), R X Y wherein, in the formula (C), R Y wherein, in the formula (D), R X Y wherein, in the formulae (1) and (1′), Ar Ar R R wherein, in the formulae (2) and (2′), Ar Ar wherein the siloxane moiety in the polyester resin A is a moiety represented by one of the following formulae: