Canon Kabushiki Kaisha

Mitsui Chemicals, Inc.

Haruki Mori

Koichi Nakata

Masaki Nonaka

Shinji Takagi

Shubun Kujirai

Ryoichi Tokimitsu

Atsushi Okuda

Tsutomu Nishida

Nobuhiro Nakamura

Kenichi Kaku

Hiroyuki Watanabe

Hideharu Shimozawa

Ryuji Higashi

Isao Kawata

Yuto Ito

Takahiro Mitsui

Eileen Takeuchi

Koji Takahashi

Koichi Suzuki

Takeshi Suzuki

Yuka Ishiduka

Daisuke Miura

Atsushi Hori

Kaoru Okamoto

Hajime Muta

Kenichi Ikari

Akiyoshi Kai

Takashi Sato

Yusuke Baba

Naoaki Ichihashi

Junichi Mohri

Masayuki Onuma

Kazuhiko Togashi

Hiroyuki Yamashita

Kohichi Kawai

Akihiro Oyabe

Shota Inoue

An electrophotographic member comprising: a base material; an elastic layer on the base material; and a surface layer on the elastic layer, wherein the elastic layer comprises silicone rubber, the surface layer comprises fluoro rubber, a thickness of the surface layer is 3 μm or more, an elastic deformation power ηIT calculated from a load displacement curve, obtained with a nanoindentation test according to ISO 14577 by bringing a Vickers indenter into contact with an outer surface of the surface layer and setting a test load at 120 μN, is 30 to 50%, and a Martens hardness determined by the nanoindentation test at the outer surface of the surface layer is 12.0 to 18.0 N/mm.

Electrophotographic member and electrophotographic image forming apparatus

It is an object of the present invention to provide an electrophotographic photosensitive member capable of suppressing the environmental fluctuation in the electrical characteristics. The present invention provides the electrophotographic photosensitive member in which the surface layer contains the compound having the specific structure.

Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus

There is provided an electrophotographic photosensitive member capable of suppressing the environmental fluctuation in repeated use. A protective layer of the electrophotographic photosensitive member contains a polymer of a composition containing a hole transporting compound having two or more (meth)acryloyloxy groups and a compound having a specific structure.

Provided is an electrophotographic photosensitive member including a support and a surface layer, wherein the surface layer contains a copolymer of a composition containing a specific hole transporting compound and a specific compound.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Provided is an electrophotographic photoreceptor, which is excellent in abrasion resistance and scratch resistance, has excellent electrical characteristics, and is capable of inhibiting an image defect, a manufacturing method of an electrophotographic photoreceptor, a process cartridge, and an electrophotographic apparatus. A surface layer of the electrophotographic photoreceptor contains a copolymer of a composition which contains resin particles containing fluorine atoms, a charge transport compound having 2 or more polymerizable functional groups, a compound represented by General Formula (1), and a resin having a structure represented by General Formula (2) and a structure represented by General Formula (3). The polymerizable functional groups t are independently selected from an acryloyloxy group and a methacryloyloxy group, and a content of the compound represented by General Formula (1) in the composition is 0.10% by mass or more. 

Electrophotographic photoreceptor, manufacturing method of electrophotographic photoreceptor, process cartridge, and electrophotographic apparatus

The present disclosure provides an electrophotographic photosensitive member having a surface layer in which an occurrence of the image deletion is suppressed; a process cartridge equipped with the electrophotographic photosensitive member; and an electrophotographic apparatus provided with the process cartridge. An electrophotographic photosensitive member has a surface layer that includes a copolymerized product of a composition including a metal oxide particle having a polymerizable functional group on a surface thereof and a polymerizable compound having a particular structure.

Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

An electrophotographic photoreceptor includes a support, a photosensitive layer, and a protection layer. The protection layer contains a copolymer of a compound having a specific frame and a hole-transporting compound containing a specific polarizable functional group.

Electrophotographic photoreceptor, process cartridge, and electrophotographic apparatus

An electrophotographic photosensitive member including: a support; and a surface layer, wherein the surface layer contains a cured product of a composition containing a curable hole-transport compound, a specific fluorine-atom-containing compound, and a specific polymerizable compound.

Provided is an electrophotographic photosensitive member improved both in wear resistance and in image unevenness. The electrophotographic photosensitive member includes a support, and a photosensitive layer and a surface layer on the support, wherein the surface layer is a cured product of a composition containing a compound represented by the formula (A) and a charge-transporting substance having at least one reactive functional group selected from the group consisting of a hydroxy group, a methoxy group, an amino group, a thiol group, and a carboxyl group.

The present disclosure provides an electrophotographic photosensitive member that has mechanical durability, and can achieve both of suppression of an image flow and adequate electrical characteristics. In the electrophotographic photosensitive member having a support and a photosensitive layer provided on the support, a surface layer of the electrophotographic photosensitive member contains a copolymerized product of a composition containing a hole transporting compound represented by the following formula (1) and a compound represented by the following formula (3): 

Provided is an electrophotographic photosensitive member including a surface layer containing: a copolymerization product of a composition containing a hole-transportable compound having a chain-polymerizable functional group and a compound having a specific structure; and metal oxide particles.

A method for producing an electrophotographic photosensitive member having a photosensitive layer and a protective layer above a support in this order includes: forming a coating film for a protective layer by coating a coating liquid for the protective layer for forming the protective layer on the photosensitive layer and curing the coating film for the protective layer, in which the coating liquid for the protective layer contains a solvent, a compound represented by a general formula (1), a compound represented by a general formula (2), and a compound represented by a general formula (3) at a specific ratio. In addition, in an electrophotographic photosensitive member having a photosensitive layer and a protective layer above a support in this order, the protective layer is obtained by curing a coating liquid for the protective layer.

Electrophotographic photosensitive member and method for producing electrophotographic photosensitive member

Provided is an electrophotographic photosensitive member that suppresses image smearing at the time of its repeated use, and expresses satisfactory wear resistance and electric characteristics. The electrophotographic photosensitive member includes a support and a photosensitive layer in the stated order, wherein a surface layer of the electrophotographic photosensitive member contains a copolymer of a hole-transportable compound having a chain-polymerizable functional group and a specific compound having maleimide groups.

Electrophotographic photosensitive member, production method therefor, process cartridge, and electrophotographic image-forming apparatus

Provided are an electrophotographic photosensitive member including a support and a photosensitive layer above the support, in which a surface layer of the electrophotographic photosensitive member includes a polymerization product of a composition containing a specific hole transporting compound, and an electrophotographic apparatus and a process cartridge including the electrophotographic photosensitive member. Also provided is a method of producing the electrophotographic photosensitive member, including (i) forming a coating film of a coating solution for a surface layer which is a composition containing a specific hole transporting compound, and (ii) forming the surface layer of the electrophotographic photosensitive member by a polymerization reaction of the composition containing the specific hole transporting compound.

Electrophotographic photosensitive member, electrophotographic apparatus, process cartridge, and method of producing electrophotographic photosensitive member

An electrophotographic photosensitive member has a surface layer that contains a polymer of a hole transport material having at least one monovalent polymerizable functional group. The hole transport material is represented by Formula (1) where n is an integer of 1 to 5, Zis represented by Formula (2) Zis a hydrogen atom or the group represented by Formula (2), and the monovalent polymerizable functional group is represented by Formula (3) 

Electrophotographic photosensitive member, electrophotographic apparatus, process cartridge, and method of manufacturing electrophotographic photosensitive member

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Ichikawa, Japan

Haruki Mori