Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHideharu Shimozawa, Kenichi Kaku, Tsutomu Nishida, Kazunori Noguchi, Akihiro Maruyama, Kaname Watariguchi, Takashi Anezaki, Haruyuki Tsuji
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Abstract
An electrophotographic photosensitive member having a support and a photosensitive layer on the support, wherein the electrophotographic photosensitive member comprises a surface layer comprising a polymerization product of a composition containing polyrotaxane and a charge transporting substance, and the polymerization product including a bond between the polyrotaxane and the charge transporting substance.
Claims5
An electrophotographic photosensitive member having a support, a photosensitive layer on the support, and a protection layer on the photosensitive layer, the protection layer being a surface layer of the electrophotographic photosensitive member, wherein
- the protection layer comprising a polymerization product of a composition containing polyrotaxane and a charge transporting substance,
- the polyrotaxane is a molecule in which a chain molecule passes through an inside of a ring of a cyclic molecule, the cyclic molecule includes the chain molecule, and blocking groups are arranged at both terminals of the chain molecule so as to prevent the cyclic molecule from being detached,
- the cyclic molecule is α-cyclodextrin having a substituent selected from the group consisting of an acryloyloxy group and a methacryloyloxy group,
- the charge transporting substance is a monomer having a polymerizable functional group selected from the group consisting of an acrylic group and a methacrylic group, the monomer having charge transport ability, and
- the polymerization product includes a bond between the polyrotaxane and the charge transporting substance.
A process cartridge that integrally supports 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 and is detachably attachable to a main body of an electrophotographic image forming apparatus,
- the electrophotographic photosensitive member having a support, a photosensitive layer on the support, and a protection layer on the photosensitive layer, the protection layer being a surface layer of the electrophotographic photosensitive member, wherein
- the protection layer comprises a polymerization product of a composition containing polyrotaxane and a charge transporting substance,
- the polyrotaxane is a molecule in which a chain molecule passes through an inside of a ring of a cyclic molecule, the cyclic molecule includes the chain molecule, and blocking groups are arranged at both terminals of the chain molecule so as to prevent the cyclic molecule from being detached,
- the cyclic molecule is α-cyclodextrin having a substituent selected from the group consisting of an acryloyloxy group and a methacryloyloxy group,
- the charge transporting substance is a monomer having a polymerizable functional group selected from the group consisting of an acrylic group and a methacrylic group, the monomer having charge transport ability, and
- the polymerization product includes a bond between the polyrotaxane and the charge transporting substance.
An electrophotographic image forming apparatus having an electrophotographic photosensitive member, a charging unit, an exposing unit, a developing unit, and a transfer unit,
- the electrophotographic photosensitive member having a support, a photosensitive layer on the support, and a protection layer on the photosensitive layer, the protection layer being a surface layer of the electrophotographic photosensitive member, wherein
- the protection layer comprises a polymerization product of a composition containing polyrotaxane and a charge transporting substance,
- the polyrotaxane is a molecule in which a chain molecule passes through an inside of a ring of a cyclic molecule, the cyclic molecule includes the chain molecule, and blocking groups are arranged at both terminals of the chain molecule so as to prevent the cyclic molecule from being detached,
- the cyclic molecule is α-cyclodextrin having a substituent selected from the group consisting of an acryloyloxy group and a methacryloyloxy group,
- the charge transporting substance is a monomer having a polymerizable functional group selected from the group consisting of an acrylic group and a methacrylic group, the monomer having charge transport ability, and
- the polymerization product includes a bond between the polyrotaxane and the charge transporting substance.
Dependencies are inferred from the claim text.