| 摘要 |
Disclosed is an electrophotographic photoreceptor which is excellent in wear resistance and electrical characteristics. Specifically disclosed is an electrophotographic photoreceptor containing a polyester resin in a photosensitive layer provided on an electroconductive substrate. The polyester resin is composed of a copolymer of formula (4), which has a viscosity average molecular weight (Mv) of 10,000-300,000 and contains a diphenyl ether 4,4′-dicarboxylic acid component and a bivalent phenol component. A represents a diphenyl ether 4,4′-dicarboxylic acid residue of formula (A), and E represents a bivalent phenol residue of formula (E). In formula (A), each of Ra1 and Ra2 independently represents a hydrogen atom or a monovalent substituent which may have a substituent, and each of n and m is independently an integer from 0 to 4. In the formula (E), each of R5 and R6 independently represents one selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a halogen group, and an alkoxy group.
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