JP2008033145A5 - - Google Patents

Claims (5)

In an electrophotographic photosensitive member having a support and a photosensitive layer provided on the support,
The surface layer of the electrophotographic photoreceptor contains a polyarylate resin having a repeating structural unit represented by the following formula (1):
An electrophotographic photoreceptor, wherein the polyarylate resin has an alkali metal atom content of 20 ppm or less.

(.X shown in the formula ^{(1), R 11 ~ R} 18 and ^R 21 ~ ^{R 28} each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group, an alkoxy group having 1 to 3 carbon atoms Represents a single bond, an oxygen atom, a sulfur atom, or a divalent group represented by the following formula (2).

(In Formula (2), R ³¹ and R ³² each independently represent a hydrogen atom, an alkyl group, a fluorinated alkyl group, an alkoxy group, or an aryl group, or R ³¹ and R ³² are bonded to each other. A cycloalkylidene group or a fluorenylidene group formed by   The electrophotographic photosensitive member according to claim 1, wherein the polyarylate resin has a diphenyl ether dicarboxylic acid content of 50 ppm or less. The electrophotographic photosensitive member according to claim 1, wherein the polyarylate resin is washed with water or ion-exchanged water . The electrophotographic photosensitive member according to any one of claims 1 to 3 and at least one means selected from the group consisting of a charging means and a developing means are integrally supported, and are detachable from the electrophotographic apparatus. Feature process cartridge. An electrophotographic apparatus comprising the electrophotographic photosensitive member according to any one of claims 1 to 3 , a charging unit, an exposure unit, a developing unit, and a transfer unit.