Canon Kabushiki Kaisha

Olympus Optical Company, Ltd.

Toyota Jidosha Kabushiki Kaisha

Olympus Corporation

Olympus Imaging Corporation

Denso Corporation

Koichi Nakata

Haruki Mori

Shinji Takagi

Osamu Nonaka

Masaki Nonaka

Takeshi Kindaichi

Koichi Suzuki

Yasuo Ito

Akira Shimada

Manabu Ichikawa

Atsushi Okuda

Tsutomu Nishida

Nobuhiro Nakamura

Yuka Ishiduka

Masataka Ide

Akio Maruyama

Kenichi Kaku

Tatsuya Ikezue

Hiroyuki Watanabe

Hiroki Uematsu

Kazunori Ueno

Ryuji Higashi

Koji Takahashi

Takayuki Ito

Naoki Yamada

Keiichiro Aoki

Norihiko Nakamura

Akihiro Senoo

Yoshiaki Kobayashi

Keiji Kunishige

Hiroki Ohrui

Tatsuo Kobayashi

Daisuke Miura

Shigeru Suzuki

Shubun Kujirai

Kazuhisa Mogi

Ryoichi Tokimitsu

Takahiro Mitsui

Shoji Amamiya

Hideharu Shimozawa

Tatsuya Sato

Shuji Ishii

Nobuo Kosaka

Isao Kawata

Takahiro Doi

Yuto Ito

Eileen Takeuchi

Youichi Kurebayashi

Naohiro Takahashi

Taiki Watanabe

Toshifumi Nakano

Yuzo Tokunaga

Hajime Muta

Fumio Shimizu

Hisayuki Matsumoto

Akio Kawaguchi

Yoshifumi Wakisaka

Kenichi Nomura

Naoki Nishikawa

Yuzuru Taguchi

Hiroaki Nihei

Yoichi Kurebayashi

Takumi Hijii

Hidemasa Kosaka

Eiji Takakuwa

Toshiaki Yamaura

Takuya Kosukegawa

Kazuhiro Kumazawa

Hiroaki Miyasho

Youichi Kurebayashi, Deceased

Provided is an electrophotographic photosensitive member including a support, a charge-generating layer, a first hole-transporting layer, and a second hole-transporting layer, wherein the second hole-transporting layer contains a hole-transportable compound represented by the formula (1) (mass: W1, energy value of the highest occupied molecular orbital: CTM1HOMO), and a hole-transportable compound represented by the formula (2) (mass: W2) and/or a hole-transportable compound represented by the formula (3) (mass: W3) (energy value of the highest occupied molecular orbital: CTM2HOMO), wherein a value calculated from the expression (I) is from 0.05% by mass to 5.0% by mass, and wherein the expression (II) is satisfied: (W2+W3)/(W1+W2+W3)×100 (% by mass) . . . Expression (I); and 0.05 (eV)≤|CTM2HOMO|−|CTM1HOMO|≤0.30 (eV) . . . (II).

Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge each including the electrophotographic photosensitive member

A method for producing an arylamine compound, wherein a chemical compound represented by formula (B) is reacted by addition reaction with a carbon atom having a bound hydrogen atom on a benzene ring of a chemical compound represented by formula (A), in the presence of one or more acids selected from Lewis acids or sulfonic acids; to produce a chemical compound represented by formula (C) including a partial structure represented by formula (D).

Methods for producing arylamine compound and electrophotographic photosensitive member

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.

Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus

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

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

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.

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.

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

An electrophotographic photosensitive member suppressing potential variation due to repeated use is provided. The electrophotographic photosensitive member is an electrophotographic photosensitive member including a support, a photosensitive layer and a protective layer in this order, wherein the protective layer contains: a resin including a structure represented by a general formula (1) and a structure represented by a general formula (2); and a compound represented by a general formula (3), the molar ratio of the proportion of the structure represented by the general formula (2) to the proportion of the structure represented by the general formula (1) in the resin is 0.0002 to 0.1000 in a molar ratio, and the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1) in the resin in the protective layer is 0.0002 to 0.1000 in a molar ratio.

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Tokyo, Japan

Koichi Nakata