JP2007272175A5 - - Google Patents

Claims (8)

In the electrophotographic photosensitive member formed by laminating a charge generation layer and a charge transport layer in this order on the conductive support from the conductive support side,
Charge transport layer, polyarylate resin containing a repeating structural unit represented by the following formula (1), and contains a charge-transporting substance represented by the following formula (A), and,
An electrophotographic photoreceptor, wherein the repeating structural unit represented by the following formula (1) is 60 to 100% in terms of molar ratio in all repeating structural units of the polyarylate resin.

(In the formula (1), R ^{11 to} R ¹⁸ and R ^{21 to} R ²⁸ each independently represent a hydrogen atom, an alkyl group, an aryl group, or an alkoxy group. X represents a single bond, an oxygen atom, or sulfur. An atom or a divalent group having a structure represented by the following formula (2) is shown.

(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. cycloalkylidene group formed Te or, shows a fluorenylidene group.))

(In Formula (A), R ^{41 to} R ⁵⁰ each independently represent a hydrogen atom, an alkyl group, or an alkoxy group, and Ar ¹ and Ar ² may each independently have a substituent. Represents an aromatic hydrocarbon group, and Y represents an oxygen atom, a sulfur atom, or a divalent group having a structure represented by the following formula (B).

(In formula (B), R ⁵¹ and R ⁵² each independently represent a hydrogen atom, an alkyl group, a fluorinated alkyl group, an alkoxy group, or an aryl group, or R ⁵¹ and R ⁵² are bonded to each other. cycloalkylidene group formed Te or, shows a fluorenylidene group.)) The electrophotographic photosensitive member according to 請 Motomeko 1 transmittance Ru der 95% or more at a wavelength of 680nm of the charge transport layer. Y in front above formula (A) is a divalent group having a structure represented by the formula (B), R ⁵¹ and ^{R 52} in the front above formula (B) is an ^{R 51} and ^{R 52} There electrophotographic photosensitive member according to 請 Motomeko 1 or 2 Ru cyclohexylidene group der cycloheteroalkyl which is formed by bonding. The polyarylate resin before following formula contained (1) the repeating structural unit represented by the said polyarylate all repeating in the structural units of the resin, 請 Motomeko 1-3 Ru 80-100% der in molar ratio terms The electrophotographic photosensitive member according to any one of the above. Wherein the poly weight average molecular weight of polyarylate resin (Mw) is an electrophotographic photosensitive member according to any of 80000 ≦ Mw ≦ 300000 Der Ru請 Motomeko 1-4. The electrophotographic photosensitive member according to any one of claims 1 to 5, and charging means, at least one means selected from the group consisting of the developing means and the cleaning means integrally supported, detachably attached to an electrophotographic apparatus main body Process cartridge characterized by being. The electrophotographic photosensitive member according to any one of claims 1 to 5, a charging means, an exposure means, a developing means, an electrophotographic apparatus, characterized in that it comprises a transfer means and a cleaning means. The electrophotographic apparatus according to claim 7 , wherein the exposure unit is a unit for irradiating the electrophotographic photosensitive member with light having a wavelength of 380 to 450 nm as exposure light.