Patent ID: 8815479
Filing Date: 2014-08-26
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 comprises a resin having a siloxane moiety at the end one or both ends, and has a matrix-domain structure having: a domain which comprises the component α; and a matrix which comprises the component β and the component γ; wherein the content of the component a is not less than 60% by mass and not more than 100% by mass relative to the total mass of the resin having a siloxane moiety at the end one or both ends in the charge-transporting layer; wherein the component a consists of a resin a1, or the resin α1 and a resin α2, and the content of the resin α1 is not less than 0.1% by mass and not more than 100% by mass relative to the total mass of the component α; wherein the resin α1 is at least one resin selected from the group consisting of a resin having a structure represented by the following formula (B), and a resin having a structure represented by the following formula (C), and the content of a siloxane moiety in the resin α1 is not less than 5% by mass and not more than 30% by mass relative to the total mass of the resin α1; wherein, in the formula (B), R R Y “k” represents number of repetitions of a structure within the brackets, “A” represents a structure represented by the following formula (A); wherein, in the formula (C), R R X Y “m” represents number of repetitions of a structure within the brackets, “A” represents a structure represented by the following formula (A): wherein, in the formula (A), R X “a” in the formula (A) and “b” in the formula (A2) each represents number of repetitions of a structure within the brackets, an average of “a” in the resin α1 or the resin α2 ranges from 10 to 400, an average of “b” in the resin α1 or the resin α2 ranges from 1 to 10; wherein the resin α2 is at least one resin selected from the group consisting of a resin having a structure represented by the following formula (D), and a resin having a structure represented by the following formula (E), and the content of a siloxane moiety in the resin α2 is not less than 5% by mass and not more than 60% by mass relative to the total mass of the resin α2; wherein, in the formula (D), R Y “1” represents number of repetitions of a structure within the brackets, “A” represents a structure represented by the formula (A); wherein, in the formula (E), R X Y “n” represents number of repetitions of a structure within the brackets, “A” represents a structure represented by the formula (A): wherein the component β is the at least one resin selected from the group consisting of a polycarbonate resin F having a repeating structural unit represented by the following formula (F) and a polyester resin G having a repeating structural unit represented by the following formula (G); wherein, in the formula (F), R Y wherein, in the formula (G), R X Y wherein the component γ is 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, in the formulae (1) and (1′), Ar R “—CH═C(Ar R wherein, in the formulae (2) and (2′), Ar Ar