Fuji Xerox Co., Ltd.

Takatsugu Doi

Katsumi Nukada

Wataru Yamada

Ken Hashimoto

Yuko Iwadate

Tsuyoshi Miyamoto

Kenya Sonobe

Masaya Ikuno

Akira Hirano

Hiroshi Inoue

Atsushi Suzuki

Yoshiro Yamashita

Tomoya Sasaki

Kunichi Yamashita

Hitoshi Takimoto

Kenji Kajiwara

Toshitake Yui

Nobuyuki Ichizawa

Eisuke Hiraoka

Yoshimi Tokita

Masahiro Iwasaki

Takashi Ogino

Tsukasa Matsuda

Kiyoshi Hosoi

Takeshi Mikami

Chizuru Koga

Kyoko Horii

Mihoko Tani

Kyoko Horinouchi

Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.

Fluorine-containing resin particle dispersion, method for preparing fluorine-containing resin particle dispersion, coating liquid which contains fluorine-containing resin particles, method for preparing coating film which contains fluorine-containing resin particles, coating film which contains fluorine-containing resin particles, molded body, electrophotographic photoreceptor, method for preparing electrophotographic photoreceptor, image forming apparatus, and process cartridge

Provided is a reactive compound represented by the following General Formula (I): wherein in General Formula (I), F represents a charge transporting skeleton, D represents a group represented by the following General Formula (III), and m represents an integer of from 1 to 8: wherein in General Formula (III), L1 represents a divalent linking group including one or more &#x2014;C(&#x2550;O)&#x2014;O&#x2014; groups.

Reactive compound, charge transporting film, photoelectric conversion device, electrophotographic photoreceptor and method of producing the same, process cartridge, and image forming apparatus

The present invention provides an image forming apparatus including: an electrophotographic photoreceptor; a charging unit; an electrostatic latent image forming unit that forms an electrostatic latent image; a developing unit that develops the electrostatic latent image formed at the electrophotographic photoreceptor by a developer to form a toner image, the developing unit storing the developer containing a toner having toner particles containing a crystalline resin and having a shape factor SF1 of from 100 to 150, a volume average particle diameter of from 3 to 6 &#x3bc;m, and fluorocarbon-based resin particles as an external additive; a transfer unit; and a cleaning unit that cleans the surface of the electrophotographic photoreceptor with a blade containing urethane rubber, the blade disposed applying a pressure to the electrophotographic photoreceptor surface of 0.20 mN/mm or more.

Image forming apparatus, and processing cartridge

An electrophotographic photoreceptor is disclosed, in which an outermost surface layer of the electrophotographic photoreceptor is made of a cured film of a composition including a compound represented by the following Formula (M1) and a charge transporting material having a chain polymerizable functional group: 

Electrophotographic photoreceptor, process cartridge, image forming apparatus, cured film, and organic electroluminescent device

To provide an electrophotographic photoreceptor including the outermost surface layer formed from a cured film of a composition containing a compound having a chain polymerizable functional group and a charge transportable skeleton in a molecule and a chain transfer agent having a sulfur atom in a molecule, in which the reaction rate of the compound having a chain polymerizable functional group and a charge transportable skeleton in a molecule is about 90% to about 100% and the charge mobility of the cured film at an electric field intensity of 1.0&#xd7;10v/cm is from about 5.0&#xd7;10cm/Vs to about 1.0&#xd7;10cm/Vs.

Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoconductor includes a conductive substrate and an outermost surface layer on the conductive substrate. The outermost surface layer contains a copolymer (a) derived from a reactive monomer having charge transport property and a reactive monomer having no charge transport property, and a polymer prepared by polymerizing, in the presence of the copolymer (a), a reactive monomer (b) that has a solubility parameter (SP value) different from a solubility parameter (SP value) of the reactive monomer having no charge transport property by about 2 (cal/cm)or less.

Electrophotographic photoconductor, method for preparing the same, process cartridge, and image forming apparatus

Provided is a thiol group-containing charge transporting material represented by the following general formula (1):F-[(G)-(X)&#x2014;Y&#x2014;SH]&#x2003;&#x2003;(1)wherein F represents an organic group derived from a charge transporting compound, G represents a divalent organic group having 1 to 5 carbon atoms, X represents a group selected from a &#x2014;CO&#x2014;O&#x2014; group, an &#x2014;O&#x2014;CO&#x2014; group, and an &#x2014;O&#x2014; group, Y represents a divalent organic group having 1 to 5 carbon atoms, a1 and a2 each independently represent 0 or 1, and b represents an integer of 1 or more and 6 or less.

Thiol group-containing charge transporting material, thiol group-containing charge transporting material-dissolving solution, photoelectric conversion device, electrophotographic photoreceptor, image forming apparatus, and process cartridge

Provided is an electrophotographic photoreceptor including a substrate and an outermost layer containing a cured film of a composition containing a compound having a chain polymerizable functional group and a charge transporting skeleton in the same molecule, and at least one chain transfer agent selected from a compound having 4 or more primary thiol groups and a compound having 2 or more secondary thiol groups.

Provided is a reactive compound represented by the following General Formula (I): wherein in General Formula (I), F represents a charge transporting skeleton, D represents a group represented by the following General Formula (III), and m represents an integer of from 1 to 8: wherein in General Formula (III), Lrepresents a divalent linking group including one or more &#x2014;C(&#x2550;O)&#x2014;O&#x2014; groups.

A charge-transporting film includes a polymer of a compound represented by Formula (I):(Ra)-Fa-Xa-Fa'-(Ra&#x2032;)&#x2032;&#x2003;&#x2003;(I)wherein Fa and Fa&#x2032; independently represent a charge-transporting sub-unit including an aromatic ring, Ra and Ra&#x2032; independently represent a &#x2014;CH&#x2550;CHdirectly bonded to the aromatic ring of the charge-transporting sub-unit or a group represented by Formula (a), Xa represents an alkylene group or a bivalent group in which an alkylene group and a group selected from &#x2014;O&#x2014;, &#x2014;S&#x2014;, and ester are combined, n and n&#x2032; independently represent an integer of 0 or more (wherein n and n&#x2032; are not simultaneously 0), and L represents a linking group which is represented by *&#x2014;(CH)&#x2014;O&#x2014;CH&#x2014; and which is bonded to the aromatic ring of the charge-transporting sub-unit, wherein n&#x2033; is 1 or 2 and the linking group is bonded to the aromatic, ring of the charge-transporting sub-unit with *.

Charge-transporting film, photoelectric conversion device, electrophotographic photoreceptor, process cartridge, and image forming apparatus

Provided is an electrophotographic photoreceptor including: a functional layer containing: a polymer of a first compound having a chain polymerizable functional group and a charge transporting skeleton in one molecule, and at least one second compound selected from a compound including at least one kind of the repeating unit represented by formula (AA) and having a weight average molecular weight of 10000 or less, a compound including at least one kind of the repeating unit represented by formula (BB) and having a weight average molecular weight of 10000 or less, a phthalic ester, a trimellitic ester, a fatty acid ester, a polyhydric alcohol ester, and a polyhydric alcohol ether. 

An electrophotographic photoreceptor has at least an electroconductive substrate, and a photosensitive layer formed on or above the electroconductive substrate, wherein an outermost layer of the photoreceptor is a cured membrane of a composition containing at least one compound (a) having in a single molecule thereof a charge transporting skeleton and a chain polymerizable functional group, and at least one thermopolymerizable or photopolymerizable silicone polymeric radical polymerization initiator (b).

An electrophotographic photoconductor includes a conductive substrate and an outermost surface layer formed on the conductive substrate and containing a binder resin and a copolymer derived from a reactive monomer having charge transport property and a reactive monomer having no charge transport property, the copolymer having a side chain with 4 or more carbon atoms in a constitutional unit derived from the reactive monomer having no charge transport property.

Electrophotographic photoconductor, process cartridge, and image forming apparatus

The present invention provides an electrophotographic photoreceptor including at least an electroconductive substrate and a photosensitive layer provided on or above the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor is a layer composed of a cured film of a composition including at least one of compound having a chain-polymerizable functional group and a charge-transportable backbone in the molecule thereof, a polymerization initiator and a radical deactivator.

Growing community of inventors

Kanagawa, Japan

Takatsugu Doi