Electrophotographic photoreceptor, process cartridge, and image forming apparatus

Abstract

An electrophotographic photoreceptor includes: a conductive substrate; and a photosensitive layer that is disposed on the conductive substrate and has a charge generation layer and a charge transport layer. The charge transport layer contains a charge-transporting material and a polyarylate resin having a dicarboxylic acid unit represented by formula (A) and a diol unit represented by formula (B). The mass ratio of the charge-transporting material in the charge transport layer is 56 mass % or more and 70 mass % or less. In formula (A), n1 is 1, 2, or 3, n1 m1's are each independently 0, 1, 2, 3, or 4, and m1 Ra1's are each independently a C1-C10 alkyl group, a C6-C12 aryl group, or a C1-C6 alkoxy group. In formula (B), Rb1 and Rb2 are each independently a hydrogen atom, a C1-C20 alkyl group, a C6-C12 aryl group, or a C7-C20 aralkyl group, Rb3, Rb4, Rb5, Rb6, Rb7, Rb8, Rb9, and Rb10 are each independently a hydrogen atom, a C1-C10 alkyl group, a C6-C12 aryl group, a C7-C20 aralkyl group, or a C1-C6 alkoxy group, and Rb1 and Rb2 taken together optionally form a cyclic alkyl group.

Dependencies are inferred from the claim text.