Canon Kabushiki Kaisha

Ryoichi Tokimitsu

Wataru Kitamura

Mai Murakami

Masaki Nonaka

Takeshi Murakami

Koichi Nakata

Haruki Mori

Yuka Ishiduka

Shinji Takagi

Kenichi Kaku

Kan Tanabe

Hideaki Nagasaka

Shubun Kujirai

Yuzo Tokunaga

Tsuyoshi Shimada

Naoto Kameyama

Takahiro Mitsui

Eileen Takeuchi

Haruhiko Mitsuda

An electrophotographic photosensitive member that has an electroconductive support and a photosensitive layer on the electroconductive support, and reduces image failures. The surface layer of the electrophotographic photosensitive member includes a cured product of a composition of: a charge transporting compound having a specific polymerizable functional group; a polytetrafluoroethylene particle having a specific primary particle diameter; and a polymer having specific structural units and having weight average molecular weight.

Electrophotographic photosensitive member, process cartridge and electrophotographic 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 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): 

The present invention provides: an electrophotographic photosensitive member which can achieve both of abrasion resistance and electrical characteristics; a production method of the electrophotographic photosensitive member; and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member includes a cured product and a specific amount of an alcohol or carboxylic acid having a specific structure, wherein the cured product is a polymerized product of a hole transporting compound having an acryloyloxy group or a methacryloyloxy group.

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

Provided are an electrophotographic photosensitive member capable of satisfying abrasion resistance and electrical properties and suppressing image deletion, and an electrophotographic apparatus and a process cartridge having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member contains a polymer of a hole transport material having a polymerizable functional group, wherein the hole transport material has a specific structure.

Electrophotographic photosensitive member, electrophotographic apparatus, and process cartridge

An electrophotographic photosensitive member, in which occurrences of image defects are suppressed, and a method for manufacturing the electrophotographic photosensitive member are provided. In addition, a process cartridge and an electrophotographic apparatus, which include the electrophotographic photosensitive member, are provided. The surface layer of the electrophotographic photosensitive member contains a cured material, and the cured material is a copolymer of a hole transport compound having a chain-polymerizable functional group and a vinyl ester compound containing a long-chain alkyl group.

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

The present invention provides an electrophotographic apparatus in which the deterioration of electrical properties in repetitive use is suppressed even in the case where an electrophotographic photosensitive member absorbs moisture under a high-temperature and high-humidity environment. An undercoat layer of the electrophotographic photosensitive member provided in the electrophotographic apparatus contains (&#x3b1;) a metal oxide particle, (&#x3b2;) a particular benzophenone compound and (&#x3b3;) a compound represented by the following formula (2). wherein Rto Reach independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group, an alkoxy group or an amino group and Arepresents an alkenyl group having 2 or more and 4 or less carbon atoms.

Electrophotographic apparatus

To provide an electrophotographic photosensitive member which satisfies abrasion resistance and electrical properties and which is difficult to cause image deletion. A surface layer of the electrophotographic photosensitive member of this invention contains a polymerized product of a hole transporting compound having a polymerizable functional group, in which the hole transporting compound is at least one compound selected from the group consisting of:

Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and condensed polycyclic aromatic compound

In an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support, a surface layer of the electrophotographic photosensitive member contains a cured product obtained by copolymerizing at least one compound (i) selected from the group consisting of a triphenylamine compound having a hydroxymethyl group and a benzidine compound having a hydroxymethyl group, and at least one compound (ii) selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), a compound represented by the following formula (3), and a compound represented by the following formula (4): 

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

The present invention provides an electrophotographic photosensitive member in which an undercoat layer contains a metal oxide particle, a particular benzophenone compound and a particular ketone compound, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member and a process for producing the electrophotographic photosensitive member.

Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus and process for producing electrophotographic photosensitive member

An electrophotographic photosensitive member includes a support, an undercoat layer which contains a metal oxide particle and is formed on the support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer. Either or both of the undercoat layer and the charge generating layer contain a compound represented by formula (1).

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

An electrophotographic photosensitive member includes an undercoat layer that includes metal oxide particles and a compound having at least three hydroxyl groups and a carbonyl or dicarbonyl group.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus incorporating an improved undercoat layer

Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer formed on the support, in which a surface layer of the electrophotographic photosensitive member contains a polymerized product of a compound represented by the following structural formula (1). 

The present invention provides an electrophotographic photosensitive member which includes an undercoat layer, and the undercoat layer contains metal oxide particles and a compound represented by the formula (1). 

Electrophotographic photosensitive member, method for manufacturing the same, process cartridge, and electrophotographic apparatus

An electrophotographic photosensitive member includes an undercoat layer containing a silane coupling agent having a divalent group represented by &#x2014;NH&#x2014; and an urethane resin. The modulus of elastic deformation (we/wt) of a surface of the undercoat layer satisfies formula (X), where the modulus of elastic deformation is measured by a universal hardness test.

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Kashiwa, Japan

Ryoichi Tokimitsu