Kyocera Document Solutions Inc.

Kyocera Mita Corporation

Mita Industrial Co., Ltd.

Kyocera Documents Solutions Inc.

Hideki Okada

Fumio Sugai

Kensuke Kojima

Jun Azuma

Keiji Maruo

Eiichi Miyamoto

Tomofumi Shimizu

Kazunari Hamasaki

Kensuke Okawa

Daisuke Kuboshima

Yoshio Inagaki

Tetsuya Ichiguchi

Hiroki Tsurumi

Yohei Yamamoto

Norio Nakai

Nobuko Akiba

Masaaki Yokoyama

Akihiko Ogata

Kenji Kitaguchi

A compound is represented by general formula (1). In general formula (1), Rand Reach represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by Rand the number of carbon atoms of the chemical group represented by Ris 2. Rand Reach represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by Rand the number of carbon atoms of the chemical group represented by Ris 2. A photosensitive layer of an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound represented by general formula (1) 

Terphenyl compound, electrophotographic photosensitive member, and method for producing terphenyl compound

An electrophotographic photosensitive member () includes a conductive substrate () and a photosensitive layer (). The photosensitive layer () is a single-layer photosensitive layer () containing a charge generating material and an electron transport material. The electron transport material includes a compound represented by general formula (1) shown below. An amount of charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer () is at least +7.0 &#x3bc;C/g. In general formula (1), Rand Reach represent, independently of each other, a halogen atom, for example. Further, m, n, and Y are as described in the description. 

Electrophotographic photosensitive member, process cartridge, and image forming apparatus

An electrophotographic photosensitive member () includes a conductive substrate () and a photosensitive layer (). The photosensitive layer () is a single-layer photosensitive layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin. The electron transport material includes a naphthoquinone derivative represented by general formula (1). An amount of triboelectric charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer () is at least +7 &#x3bc;C/g. In general formula (1), Rand Rare respectively the same as Rand Rdescribed in the description. 

An electrophotographic photosensitive member includes a conductive substrate and a single-layer photosensitive layer. The photosensitive layer contains at least a charge generating material and a compound represented by general formula (1). In general formula (1), Rrepresents an aryl group having a carbon number of at least 6 and no greater than 22 and optionally having an alkyl group having a carbon number of at least 1 and no greater than 10, an alkyl group having a carbon number of at least 3 and no greater than 20, an aralkyl group having a carbon number of at least 7 and no greater than 20, a cycloalkyl group having a carbon number of at least 3 and no greater than 20, or an alkoxy group having a carbon number of at least 1 and no greater than 6. Chemical groups Reach represent a halogen atom. 

Electrophotographic photosensitive member

An electrophotographic photosensitive member () includes a conductive substrate () and a photosensitive layer (). The photosensitive layer () contains a charge generating material and a compound represented by general formula (1) shown below. In general formula (1), Rand Reach represent, independently of one another: a C1-20 alkyl group optionally having at least one of a C6-14 aryl group optionally having a substituent and a C2-20 alkoxycarbonyl group; a C6-14 aryl group optionally having a C1-20 alkyl group; a C3-10 cycloalkyl group; or a C1-6 alkoxy group. 

An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer has a single-layer structure and contains a charge generating material and a compound represented by general formula (1) shown below. In the general formula (1), Rand Reach represent, independently of each other: an alkyl group having 1 to 12 carbon atoms and optionally substituted by an alkoxy group having 1 to 6 carbon atoms or an alkoxycarbonyl group having 2 to 6 carbon atoms; an aryl group having 6 to 14 carbon atoms and optionally substituted by an alkyl group having 1 to 6 carbon atoms; an aralkyl group having 7 to 20 carbon atoms; or a cycloalkyl group having 3 to 10 carbon atoms. X represents &#x2014;S&#x2014; or &#x2014;SO&#x2014;. 

A quinone derivative is represented by general formula (1). In general formula (1), at least one of R-Rand at least one of R-Reach represent, independently of one another, an alkyl group having 4 to 10 carbon atoms or an alkyl group having 2 to 5 carbon atoms that has an aryl group having 6 to 14 carbon atoms. All other of R-Rand all other of R-Reach represent, independently of one another, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 14 carbon atoms, or a cycloalkyl group having 3 to 10 carbon atoms. 

Quinone derivative and electrophotographic photosensitive member

A quinone derivative is represented by general formula (1), (2), or (3). In general formulae (1), (2), and (3), R, R, R, R, R, R, R, R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, a cyano group, a halogen atom, an optionally substituted alkyl group having a carbon number of 1-6, or an optionally substituted alkoxy group having a carbon number of 1-6. R, R, R, R, R, and Reach represent, independently of one another, an optionally substituted alkyl group having a carbon number of 1-6, an optionally substituted alkoxy group having a carbon number of 1-6, an optionally substituted aryl group having a carbon number of 6-14, an optionally substituted aralkyl group having a carbon number of 7-12, or an optionally substituted cycloalkyl group having a carbon number of 3-10. 

An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer containing a charge generating material, a hole transport material, a quinone derivative, and a binder resin. The quinone derivative is represented by general formula (1) or (2), where R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of at least 1 and no greater than 12, an aryl group that has a carbon number of at least 6 and no greater than 14 and that may have an alkyl group having a carbon number of at least 1 and no greater than 6, an aralkyl group having a carbon number of at least 7 and no greater than 12, or a cycloalkyl group having a carbon number of at least 3 and no greater than 10. Z represents an oxygen atom or a sulfur atom. 

A triarylamine derivative represented by general formula (1) below. In the general formula (1), R, R, R, R, R, R, R, and Reach represent, independently from one another, a hydrogen atom, an optionally substitute alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14, Rrepresents an alkyl group having a carbon number of at least 1 and no greater than 4, X represents an alkylene group having a carbon number of at least 1 and no greater than 6 or an oxygen atom, and n represents an integer of 1 to 3. 

Triarylamine derivative, electrophotographic photosensitive member, and method for producing electrophotographic photosensitive member

A naphthalenedicarboximide derivative is represented by general formula (1) or (2). In general formulas (1) and (2), R, R, and Reach represent, independently of one another, an alkyl group which has a carbon number from 1 to 10 and which may have an aryl group having a carbon number from 6 to 14, an aryl group which has a carbon number from 6 to 14 and which may have an alkyl group having a carbon number from 1 to 10, a cycloalkyl group having a carbon number from 3 to 10, or an alkoxy group having a carbon number from 1 to 6, and m represents an integer from 0 to 4. When m represents an integer of 2 or more, chemical groups Rmay each be the same or may each be different. 

Naphthalenedicarboximide derivative and electrophotographic photosensitive member

A multi-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a hole transport material and a binder resin. The charge generating material contains a titanyl phthalocyanine that exhibits a main peak at a Bragg angle (2&#x3b8;&#xb1;0.2&#xb0;) of 27.2&#xb0; in a CuK&#x3b1; characteristic X-ray diffraction spectrum. The hole transport material contains a triarylamine derivative represented by generic formula (1). The hole transport material has a mass ratio of at least 0.30 and no greater than 0.55 relative to the binder resin in the charge transport layer. In general formula (1), R, R, l, and m are the same as those defined in the specification. 

Multi-layer electrophotographic photosensitive member, process cartridge, and image forming apparatus

A benzidine derivative is represented by general formula (1). In the general formula (1), R, R, R, R, R, R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14. n represents an integer of at least 0 and no greater than 2. 

Benzidine derivative, method for producing benzidine derivative, and electrophotographic photosensitive member

A triphenylamine derivative is represented by general formula (1). In the general formula (1): R, R, R, R, R, R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkenyl group having a carbon number of at least 2 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14; m represents an integer of at least 1 and no greater than 3; and n represents an integer of at least 0 and no greater than 2. 

A quinone derivative represented by general formula (1) where, in the general formula (1), chemical groups Reach represent, independently of one another, an alkyl group, a cycloalkyl group, an alkoxy group, an aralkyl group, or an aryl group, and Rrepresents an alkyl group, an aralkyl group, a cycloalkyl group, an alkoxy group, an aryl group, or a heterocyclic group. 

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Osaka, Japan

Hideki Okada