| 主权项 |
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 comprises a charge-transporting substance; wherein: a surface layer of the electrophotographic photosensitive member comprises at least one resin selected from the group consisting of a resin B having a structure represented by the following formula (B) and a resin C having a structure represented by the following formula (C); and a lower layer in contact with the surface layer comprises at least one resin selected from the group consisting of a polycarbonate resin D having a repeating structural unit represented by the following formula (D), a polyester resin E having a repeating structural unit represented by the following formula (E), and a polyvinyl acetal resin F having a repeating structural unit represented by the following formula (F-A), a repeating structural unit represented by the following formula (F-B), and a repeating structural unit represented by the following formula (F-C): wherein, in the formula (B), R11 to R14 each independently represent a hydrogen atom, or a methyl group; X1 and X2 each independently represent a m-phenylene group, a p-phenylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom; Y1 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a phenylethylidene group, a cyclohexylidene group, or an oxygen atom; “k” represents the number of repetitions of a structure within the brackets; and “A” represents a structure represented by the following formula (A): wherein, in the formula (C), R21 to R24 each independently represent a hydrogen atom, or a methyl group; Y2 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a phenylethylidene group, a cyclohexylidene group, or an oxygen atom; R25 represents a structure represented by the following formula (R25-1), (R25-2), or (R25-3); X3 represents a m-phenylene group, a p-phenylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom; “l” represents the number of repetitions of a structure within the brackets; and “A” represents a structure represented by the following formula (A): wherein, in the formulas (R25-2) and (R25-3), X4 represents a m-phenylene group, a p-phenylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom; and in the formula (A), “a”, “b”, and “c” each represent the number of repetitions of a structure within the brackets, an average of “a” in the resin B and the resin C ranges from 10 to 100, an average of “b” in the resin B and the resin C ranges from 1 to 3, and an average of “c” in the resin B and the resin C ranges from 2 to 4; and R31 represents an alkyl group having 1 to 4 carbon atoms; wherein, in the formula (D), R41 to R44 each independently represent 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 (E), R51 to R54 each independently represent a hydrogen atom, or a methyl group; X5 represents a m-phenylene group, a p-phenylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom; and Y4 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 (F-A), R61 represents an alkyl group having 1 to 4 carbon atoms. |
