JP2007199686A5 - - Google Patents

Claims (7)

In an electrophotographic photoreceptor having a support and a photosensitive layer formed on the support,
Surface layer of the electrophotographic photosensitive member contains a fluorine atom-containing organopolysiloxane have a repeating structural unit β being represented by the repeating structural unit α and the following formula represented by the following formula (1) (2),
Structure of the ends of the fluorine atom-containing organopolysiloxane has a structure γ represented by the following formula (3),
The weight average molecular weight of the fluorine atom-containing organopolysiloxane state, and are 10,000 to 50,000,
The content of the fluorine atom-containing organopolysiloxane of the surface layer is not more than 10 wt% or more 2% by weight relative to the total weight of the surface layer,
The surface layer is different from that the fluorine atom-containing organopolysiloxane further contains a polycarbonate resin or a polyester resin having a siloxane structural unit represented by the siloxane structural unit and the following formula represented by the following formula (4) (5) ,
That said polycarbonate resin or the following formula relative to the total weight of the polyester resin mass component ratio of the siloxane structural unit represented by the siloxane structural unit represented by the below-described formula (4) (5) is 60 wt% or less than 10 wt% An electrophotographic photoreceptor characterized by the above.

(In the formulas (1) to (3), R ₁ represents a monovalent organic group containing a fluorine atom, and R _{2 to} R ₆ each independently represents a substituted or unsubstituted monovalent hydrocarbon group. R ₇ represents a monovalent organic group having a polystyrene-based residue.)

(In the formula (4) and _(5), R 8 _{-R 16} are independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group or aryl group, m and n represent the number of repetitions Indicates average value.) The photosensitive layer has a charge generation layer and a charge transport layer, the charge transport layer is the surface layer, and the charge transport layer comprises a binder resin, a charge transport material, the fluorine atom-containing organopolysiloxane, and The electrophotographic photoreceptor according to claim 1, comprising a polycarbonate resin or a polyester resin having a siloxane structural unit represented by the formula (4) and a siloxane structural unit represented by the formula (5). Formula (4) siloxane structural unit represented by the formula (5) of the polycarbonate resin or polyester resin having a siloxane structural unit represented by the content, 0.1 mass% or more with respect to the total mass of the surface layer der 5 wt% or less Ru請 Motomeko 1 or 2 the electrophotographic photosensitive member according to.   4. The electrophotographic photosensitive member according to claim 1 and at least one unit selected from the group consisting of a charging unit, a developing unit and a cleaning unit are integrally supported and detachable from the electrophotographic apparatus. A process cartridge characterized by that. The process cartridge according to claim 4, wherein the process cartridge has at least the cleaning means, the cleaning means is closed the cleaning blade. The electrophotographic photosensitive member according to claim 1, a charging means, an exposure means, a developing means, an electrophotographic apparatus, characterized in that it comprises a transfer means and a cleaning hands stage. The electrophotographic apparatus according to claim 6, wherein the cleaning means is closed the cleaning blade.