| 主权项 |
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), Y1 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a phenylethylidene group, a cyclohexylidene group, or an oxygen atom; X1 represents a meta-phenylene group, a para-phenylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, and W1 represents a univalent group represented by the following formula (a), or a univalent group represented by the following formula (b); wherein, in the formulae (a) and (b), R41 represents a methyl group, or a phenyl group, R42 and R43 each independently represents an alkyl group having 1 to 4 carbon atoms, “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), R51 to R54 each independently represents a hydrogen atom, or a methyl group, X2 represents a meta-phenylene group, a para-phenylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, and Y2 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a phenylethylidene group, a cyclohexylidene group, or an oxygen atom; wherein, in the formula (C), R61 to R64 each independently represents a hydrogen atom, or a methyl group, and Y3 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a phenylethylidene group, a cyclohexylidene group, or an oxygen atom; wherein, in the formula (D), R71 to R74 each independently represents a hydrogen atom, or a methyl group, X4 represents a meta-phenylene group, a para-phenylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, and Y4 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, or an oxygen atom; wherein, in the formulae (1) and (1′), Ar1 represents a phenyl group, or a phenyl group substituted with a methyl group or an ethyl group, Ar2 represents a phenyl group, a phenyl group substituted with a methyl group, a phenyl group substituted with a univalent group represented by the formula “—CH═CH—Ta”, or a biphenyl group substituted with a univalent group represented by the formula “—CH═CH—Ta” (where, Ta represents a univalent group derived from a benzene ring of a triphenylamine by loss of one hydrogen atom, or derived from a benzene ring of a triphenylamine substituted with a methyl group or an ethyl group by loss of one hydrogen atom), R1 represents a phenyl group, a phenyl group substituted with a methyl group, or a phenyl group substituted with a univalent group represented by the formula “—CH═C(Ar3)Ar4” (where, Ar3 and Ar4 each independently represents a phenyl group or a phenyl group substituted with a methyl group), and R2 represents a hydrogen atom, a phenyl group, or a phenyl group substituted with a methyl group; wherein, in the formulae (2) and (2′), Ar21, Ar22, Ar24, Ar25, Ar27, and Ar28 each independently represents a phenyl group or a tolyl group, Ar23 and Ar26 each independently represents a phenyl group or a phenyl group substituted with a methyl group, and wherein the siloxane moiety in the polyester resin A is a moiety represented by one of the following formulae: |
