Back to results
US 2025/0155831 A1Published application
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMASAYUKI SHINOZUKA, NORIHIRO KANO, EILEEN TAKEUCHI
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member, which is excellent in cleaning property and durability, and in which residual potential is reduced and occurrence of a crack is suppressed. In the electrophotographic photosensitive member including a surface layer, the surface layer contains: a binder resin; and organic resin particles, the binder resin has a specific structural unit, and the organic resin particles are each subjected to surface treatment with a specific compound.
Claims10
An electrophotographic photosensitive member comprising:
- a surface layer,
- wherein the surface layer contains:
- a binder resin;
- and
- organic resin particles,
- wherein the binder resin contains a resin having a structural unit represented by formula (A) or (B), and
- wherein the organic resin particles are each subjected to surface treatment with a compound represented by formula (C) or (D):
- in the formula (A), R101 to R104 each independently represent a hydrogen atom or a methyl group, X1 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond, and Y1 represents a m-phenylene group, a p-phenylene group, or a divalent group obtained by bonding two p-phenylene groups through an oxygen atom;
- in the formula (B), R201 to R204 each independently represent a hydrogen atom or a methyl group, and X2 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond;
- in the formula (C), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group, or a halogen atom,
- at least one of R11 to R14 represents an alkoxy group or a halogen atom;
- and
- in the formula (D), R21 to R26 each independently represent an alkyl group or a phenyl group.
10 more elements
A process cartridge comprising:
- an electrophotographic photosensitive member comprising a surface layer;
- and
- at least one unit selected from the group consisting of:
- a charging unit;
- a developing unit;
- and a cleaning unit,
- the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and being detachably attachable to a main body of an electrophotographic apparatus,
- wherein the surface layer contains:
- a binder resin;
- and
- organic resin particles,
- wherein the binder resin contains a resin having a structural unit represented by formula (A) or (B), and
- wherein the organic resin particles are each subjected to surface treatment with a compound represented by formula (C) or (D):
- in the formula (A), R101 to R104 each independently represent a hydrogen atom or a methyl group, X1 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond, and Y1 represents a m-phenylene group, a p-phenylene group, or a divalent group obtained by bonding two p-phenylene groups through an oxygen atom;
- in the formula (B), R201 to R204 each independently represent a hydrogen atom or a methyl group, and X2 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond;
- in the formula (C), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group, or a halogen atom,
- at least one of R11 to R14 represents an alkoxy group or a halogen atom;
- and
- in the formula (D), R21 to R26 each independently represent an alkyl group or a phenyl group.
16 more elements
An electrophotographic apparatus comprising:
- the electrophotographic photosensitive member comprising a surface layer;
- a charging unit;
- an image exposing unit;
- a developing unit;
- and
- a transfer unit,
- wherein the surface layer contains:
- a binder resin;
- and
- organic resin particles,
- wherein the binder resin contains a resin having a structural unit represented by formula (A) or (B), and
- wherein the organic resin particles are each subjected to surface treatment with a compound represented by formula (C) or (D):
- in the formula (A), R101 to R104 each independently represent a hydrogen atom or a methyl group, X1 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond, and Y1 represents a m-phenylene group, a p-phenylene group, or a divalent group obtained by bonding two p-phenylene groups through an oxygen atom;
- in the formula (B), R201 to R204 each independently represent a hydrogen atom or a methyl group, and X2 represents a methylene group that may have an alkyl group or a phenyl group as a substituent, a cyclohexylidene group, an oxygen atom, or a single bond;
- in the formula (C), R11 to R14 each independently represent an alkyl group, a phenyl group, an alkoxy group, or a halogen atom,
- at least one of R11 to R14 represents an alkoxy group or a halogen atom;
- and
- in the formula (D), R21 to R26 each independently represent an alkyl group or a phenyl group.
15 more elements
Dependencies are inferred from the claim text.