Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNORIHIRO KANO, MASAYUKI SHINOZUKA, EILEEN TAKEUCHI
Life of this patent
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Abstract
An electrophotographic photosensitive member that is excellent in the cleaning property and the durability and has a reduced residual potential. The electrophotographic photosensitive member has a surface layer, wherein the surface layer contains a vinyl resin particle, and the vinyl resin particle is surface-treated with a specific compound.
Claims9
An electrophotographic photosensitive member having a surface layer, wherein
- the surface layer comprises a vinyl resin particle and a charge transport substance, and
- the vinyl resin particle is surface-treated with at least one selected from the group consisting of:
- a compound represented by formula (A) and a compound represented by formula (B):
- wherein in formula (A), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group or a halogen atom, provided that at least one of R11 to R14 is an alkoxy group or a halogen atom, and at least one of R11 to R14 is an alkyl group or a phenyl group;
- and
- in formula (B), R21 to R26 each independently represent an alkyl group or a phenyl group.
A process cartridge that integrally supports at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit, and that is freely attachable to and detachable from a main body of an electrophotographic apparatus, wherein
- the process cartridge comprises an electrophotographic photosensitive member,
- the electrophotographic photosensitive member has a surface layer,
- the surface layer comprises a vinyl resin particle and a charge transport substance, and
- the vinyl resin particle is surface-treated with at least one selected from the group consisting of:
- a compound represented by formula (A) and a compound represented by formula (B):
- wherein in formula (A), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group or a halogen atom, provided that at least one of R11 to R14 is an alkoxy group or a halogen atom, and at least one of R11 to R14 is an alkyl group or a phenyl group;
- and
- in formula (B), R21 to R26 each independently represent an alkyl group or a phenyl group.
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging unit, an image exposure unit, a developing unit and a transfer unit, wherein
- the electrophotographic photosensitive member has a surface layer,
- the surface layer comprises a vinyl resin particle and a charge transport substance, and
- the vinyl resin particle is surface-treated with at least one selected from the group consisting of:
- a compound represented by formula (A) and a compound represented by formula (B):
- wherein in formula (A), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group or a halogen atom, provided that at least one of R11 to R14 is an alkoxy group or a halogen atom, and at least one of R11 to R14 is an alkyl group or a phenyl group;
- and
- in formula (B), R21 to R26 each independently represent an alkyl group or a phenyl group.
Dependencies are inferred from the claim text.