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US 12,487,536 B2Granted
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus, and method of producing electrophotographic photosensitive member
AssigneeCanon Kabushiki Kaisha
InventorsEileen Takeuchi, Jun Ohira, Naoto Kameyama
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member including a surface layer, wherein the surface layer comprises a fluorine atom-containing resin particle, a binder material, and a polymer having a specific structural unit represented by the following formula (1): In formula (1) R11 represents a hydrogen atom or a methyl group, R12 represents a single bond or a methylene group, Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms.
Claims19
An electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises
- a fluorine atom-containing resin particle,
- a binder material that is a cured product of a hole-transportable compound having a chain-polymerizable functional group,
- a compound represented by the following formula (3), and
- a polymer A having a structural unit represented by the following formula (1), and
- wherein the polymer A is free of a structural unit having an acidic group having a pKa of 3 or less:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
12 more elements
A process cartridge comprising:
- an electrophotographic photosensitive member;
- 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,
- the electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises
- a fluorine atom-containing resin particle,
- a binder material that is a cured product of a hole-transportable compound having a chain-polymerizable functional group,
- a compound represented by the following formula (3), and
- a polymer A having a structural unit represented by the following formula (1), and
- wherein the polymer A is free of a structural unit having an acidic group having a pKa of 3 or less:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
20 more elements
An electrophotographic apparatus comprising:
- an electrophotographic photosensitive member;
- a charging unit;
- an exposing unit;
- a developing unit;
- and
- a transferring unit,
- the electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises
- a fluorine atom-containing resin particle,
- a binder material that is a cured product of a hole-transportable compound having a chain-polymerizable functional group,
- a compound represented by the following formula (3), and
- a polymer A having a structural unit represented by the following formula (1), and
- wherein the polymer A is free of a structural unit having an acidic group having a pKa of 3 or less:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
19 more elements
An electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises a fluorine atom-containing resin particle, a binder material, a compound represented by the following formula (3), and a polymer A having a structural unit represented by the following formula (1), and
- wherein the binder material is a cured product of a hole-transportable compound having a chain-polymerizable functional group:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
8 more elements
A process cartridge comprising:
- an electrophotographic photosensitive member;
- 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,
- the electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises a fluorine atom-containing resin particle, a binder material, a compound represented by the following formula (3), and a polymer A having a structural unit represented by the following formula (1), and
- wherein the binder material is a cured product of a hole-transportable compound having a chain-polymerizable functional group:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
16 more elements
An electrophotographic apparatus comprising:
- an electrophotographic photosensitive member;
- a charging unit;
- an exposing unit;
- a developing unit;
- and
- a transferring unit,
- the electrophotographic photosensitive member comprising a surface layer,
- wherein the surface layer comprises a fluorine atom-containing resin particle, a binder material, a compound represented by the following formula (3), and a polymer A having a structural unit represented by the following formula (1), and
- wherein the binder material is a cured product of a hole-transportable compound having a chain-polymerizable functional group:
- where, in formula (1),
- R11 represents a hydrogen atom or a methyl group,
- R12 represents a single bond or a methylene group,
- Rf1 and Rf2 each independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and
- Rf3 represents a perfluoroalkyl group having 1 to 3 carbon atoms,
- R31—O—R32 (3)
- where, in formula (3),
- R31 represents an alkyl group or a fluoroalkyl group, and
- R32 represents a fluoroalkyl group.
15 more elements
Dependencies are inferred from the claim text.