Arylamine Containing Patents (Class 430/58.65)
  • Patent number: 10720472
    Abstract: An X-ray detector, particularly a pixelated flat panel X-Ray detector using semiconducting perovskites as direct converting layer, has a top electrode, a photoactive layer containing at least one perovskite, and a bottom electrode, wherein the X-ray detector additionally has an electron blocking interlayer and/or a hole blocking interlayer containing an adhesion promoting additive, which can be one or more of saccharides and derivatives thereof, amino resins, epoxy resins, natural resins, and acrylic based adhesives.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 21, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Rene Fischer, Alberto Gregori, Judith Elisabeth Huerdler, Cindy Montenegro Benavides, Sandro Francesco Tedde
  • Patent number: 9983494
    Abstract: An image forming apparatus includes an electrophotographic photoreceptor having an overcoat layer and a cleaning unit that includes a cleaning blade, a tip of which contacts with the electrophotographic photoreceptor, wherein the toner contains a toner particle which contains a binder resin containing a crystalline polyester resin, a colorant and a release agent, and an external additive, and the toner satisfies the following Expression: 2?tan ?P1?2.5, wherein tan ?P1 represents a maximum value of a mechanical loss tangent existing in a range where a complex elastic modulus is from 1×106 Pa to 1×108 Pa, which is measured at an angular frequency of 6.28 rad/sec and a strain amount of 0.3%.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: May 29, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yusuke Fukuda, Masataka Kuribayashi, Naoki Ota, Takafumi Koide, Katsuyuki Kitajima, Yasuhisa Morooka
  • Patent number: 9678446
    Abstract: A electrophotographic photoconductor is provided. The electrophotographic photoconductor includes a conductive support, an undercoat layer overlying the conductive support, and a photosensitive layer overlying the undercoat layer. The undercoat layer includes a metal oxide particle, binder resin, and a compound having a urea group.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: June 13, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshihiro Ishida, Eiji Kurimoto, Tetsuro Suzuki, Tomoharu Asano, Daisuke Nii
  • Patent number: 9494881
    Abstract: A triarylamine derivative is represented by general formula (1) shown below. In general formula (1), each R1 independently represents a halogen atom, an optionally substituted alkyl group having a carbon number of 1-6, an optionally substituted alkoxy group having a carbon number of 1-6, or an optionally substituted aryl group having a carbon number of 6-12. Each k independently represents an integer of 0-4, and each m independently represents an integer of 1-3. Each R2 independently represents a halogen atom, an optionally substituted alkyl group having a carbon number of 1-6, an optionally substituted alkoxy group having a carbon number of 1-6, or an optionally substituted aryl group having a carbon number of 6-12. Each p independently represents an integer of 0-4.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: November 15, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hideki Okada, Fumio Sugai, Kensuke Kojima
  • Patent number: 9366978
    Abstract: The present disclosure is related to coated photoconductors. In an example, a coated photoconductor can comprise a photoconductor including a substrate having a charge generation layer and charge transport layer adhered thereto and a top coating adhered to the photoconductor. The top coating can comprise a cross-linkable polymer, a cross-linker, and a polymeric dopant having a weight average molecular weight of less than 500,000. Additionally, the top coating can have a thickness of 0.1 ?m to 12 ?m and the polymeric dopant can be present in the top coating at a concentration of 0.1 wt % to 10 wt %.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: June 14, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Krzysztof Nauka, Zhang-Lin Zhou, Hou T. Ng
  • Patent number: 9147846
    Abstract: A pyrene compound and an organic light emitting diode device including the same are disclosed. The organic light emitting diode device includes at least two stacks provided between a first electrode and a second electrode, and a charge generation layer provided between the stacks and including an N type charge generation layer and a P type charge generation layer, wherein the N type charge generation layer is made of the pyrene compound.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: September 29, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Shinhan Kim, Jeongdae Seo, Hyoseok Kim, Youngkwan Jung, Eunju Jeon
  • Patent number: 9122183
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; a photosensitive layer overlying the electroconductive substrate; and a surface layer overlying the photosensitive layer, wherein the surface layer includes a resin having no charge transportability; and an inorganic particulate material, wherein the inorganic particulate material is a zinc oxide doped with a boron group, and wherein the electrophotographic photoreceptor has a surface specific resistivity (R1) not less than 1013 ?/cm2 when the surface layer has an electric field intensity of 1×104 V/cm, and a ratio (R1/R15) of the surface specific resistivity (R1) to a surface specific resistivity (R15) when the surface layer has an electric field intensity of 1.5×105 V/cm of from 100 to 5,000.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: September 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Toshine, Hiroshi Ikuno, Naohiro Toda, Takafumi Iwamoto, Kazuhiro Egawa, Toshihiro Ishida
  • Patent number: 9040215
    Abstract: To provide an amine compound, represented by General Formula (I) below: [In General Formula (I), R1 and R2 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group, which may be identical or different; m and n are an integer of 1 or 0; Ar1 represents a substituted or unsubstituted aromatic hydrocarbon group; Ar2 and Ar3 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group; and Ar1 and Ar2 or Ar2 and Ar3 may bind to each other to form a substituted or unsubstituted heterocyclic group including a nitrogen atom.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: May 26, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masayoshi Nomura, Ryota Arai
  • Patent number: 9029053
    Abstract: An electrophotographic photoreceptor, an electrophotographic photoreceptor cartridge, and an image forming apparatus, which are excellent in electrical characteristics such as a responsivity and at the same time, excellent in the crack resistance, are provided. Two kinds of charge transport substances each having a specific structure and a polyester resin having a specific structure are combined, whereby the crack resistance can be improved.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: May 12, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Akiteru Fujii
  • Patent number: 9023562
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate that includes an organic photoconductive material and charge transport materials including a styryl compound represented by structural formula (I) below and a triphenylamine compound represented by structural formula (II) below: wherein the charge transport materials have a mixing ratio of from 8.33 to 16.67 mass % of the styryl compound to from 91.67 to 83.33 mass % of the triphenylamine compound.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: May 5, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Takashi Ueno, Yuji Ogawa, Keiichi Kurokawa
  • Patent number: 8993203
    Abstract: An electrophotographic photoreceptor, an electrophotographic photoreceptor cartridge, and an image forming apparatus, which are excellent in electrical characteristics such as a responsivity and at the same time, excellent in the crack resistance, are provided. Two kinds of charge transport substances each having a specific structure and a polycarbonate resin having a specific structure are combined, whereby the electrical characteristics such as responsivity and the crack resistance can be improved at the same time.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Akiteru Fujii
  • Publication number: 20150064614
    Abstract: A photoreceptor includes a substrate a charge generating layer disposed on the substrate and a charge transport layer disposed on the charge generating layer, the charge transport layer includes a hole transport molecule, a fluorinated diol, and a leveling agent, the charge transport layer is substantially free of a polymer binder and catalyst, and has a post-discharge voltage of less than about 10 volts.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gregory McGuire, Sarah J. Vella, Adrien P. Cote, Yvan Gagnon, Brynn Dooley
  • Patent number: 8951702
    Abstract: A charge transport material having reduced photodeterioration is disclosed to be an ethylene compound having an ethylene double bond site, having a structure in which four different substituents are substituted at the ethylene double bond site, and having general formula (I) below where R1, R2 and R3 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbons or an alkoxyl group of 1 to 6 carbons; R4 is phenyl or tolyl; and Ar is one group selected from the group consisting of naphthyl, biphenyl, anthryl, xylyl, and phenanthryl. An electrophotographic photoreceptor and process for producing the electrophotographic photoreceptor also are disclosed. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate that includes the charge transport material.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 10, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Fengqiang Zhu, Yoichi Nakamura, Ikuo Takaki, Seizo Kitagawa, Shinjirou Suzuki
  • Patent number: 8927183
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer, which is located overlying the electroconductive substrate and which includes a charge generation material, a charge transport material having no radical polymerizability, a binder resin having no radical polymerizability, and a crosslinked polymer including a unit obtained from a first radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a second radically polymerizable monomer having a charge transport structure; and an outermost layer, which is located on the photosensitive layer and which includes a crosslinked polymer including a unit obtained from a third radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a fourth radically polymerizable monomer having a charge transport structure. An image forming method and apparatus, and a process cartridge using the photoreceptor.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiaki Kawasaki, Akihiro Sugino, Mitsuaki Hirose
  • Patent number: 8883383
    Abstract: A photoreceptor charge transport layer comprising a film-forming material or binder with a fluoroacyl arylamine charge transport molecule is described.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: November 11, 2014
    Assignee: Xerox Corporation
    Inventors: Adrien P Cote, Richard A Klenkler, Amanda L Bongers, Gregory M McGuire
  • Patent number: 8808951
    Abstract: An object of the present invention is to provide an electrophotographic photosensitive body having improved electrophotographic characteristics such as sensitivity and residual potential and also having excellent durability. The present invention provides an electrophotographic photosensitive body having a layer containing at least one specific p-terphenyl compound and at least one polycarbonate resin represented by the general formula (I): in a mass ratio of the p-terphenyl compound to the polycarbonate resin within the range of 2:8 to 7:3.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: August 19, 2014
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Katsumi Abe, Atsushi Takesue, Takehiro Nakajima, Makoto Koike, Shinya Nagai
  • Patent number: 8802339
    Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane methacrylate functional charge transport molecule, and a photoinitiator. The urethane acrylate functional charge transport molecule is a reaction product of hydroxyl functional charge transport molecule and a monomer having an isocyanate group and an acrylate group. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its useful life.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 12, 2014
    Assignee: Lexmark International, Inc.
    Inventor: Scott Daniel Reeves
  • Patent number: 8753789
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising: at least one resin selected from the group consisting of a polycarbonate resin C and a polyester resin D; and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (1?), and a domain comprising a polycarbonate resin A.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: June 17, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Harunobu Ogaki, Kazunori Noguchi, Atsushi Okuda, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • Patent number: 8741512
    Abstract: Provided is an additive for an electrophotographic photoreceptor which is represented by Formula (I): wherein, A represents an m-valent organic group derived from arylamine represented by Formula (II) or Formula (III); T represents a divalent hydrocarbon group having from 1 to 10 carbon atoms; Rf represents a branched hydrocarbon group having from 3 to 10 carbon atoms in which at least one hydrogen atom is substituted with a fluorine atom; l represents 0 or 1; and m represents an integer of 1 to 4: wherein, Ar1, Ar2, and Ar3 each independently represent a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms; Ar4, Ar5, Ar6, and Ar7 each independently represent a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms; and X represents a divalent organic group represented by Formula (IV), Formula (V), or Formula (VI):
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: June 3, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Iwasaki, Yuko Yamano, Yukimi Kawabata
  • Patent number: 8715896
    Abstract: A photoconductor containing an optional supporting substrate layer, a photogenerating layer, a polyalkylene glycol benzoate containing charge transport layer, and a top overcoat layer in contact with and contiguous to the charge transport layer, and which overcoat layer includes charge transport compounds and melamine resins.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: May 6, 2014
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8669028
    Abstract: An electrophotographic photoreceptor is provided, which includes: a substrate; a photosensitive layer; and a surface protective layer, in this order, in which the protective layer contains a crosslinked product of a curable charge transporting material in a content of from about 90 to 98% by weight, and fluorinated resin particles in a content of from about 2 to 10% by weight, and the protective layer satisfies Formula (1): 0.5?b/a?1, wherein, “a” represents a ratio of fluorine atoms to the sum of carbon atoms, oxygen atoms, and fluorine atoms present in a region of the protective layer ranging from the photosensitive layer side surface thereof to a point corresponding to about ? of the thickness thereof, and “b” represents the ratio in a region of the protective layer ranging from the outer surface thereof to a point corresponding to about ? of the thickness thereof.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: March 11, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yukimi Kawabata, Yuko Yamano, Kazuyuki Tada, Kenji Ikeda, Mitsuhide Nakamura
  • Patent number: 8663882
    Abstract: To provide an electrophotographic photoreceptor excellent in electric characteristics and various characteristics, capable of forming a uniform photosensitive layer and excellent in repetitive characteristics, an image forming apparatus using it and an electrophotgraphic cartridge. A lamination type electrophotographic photoreceptor comprising an electroconductive substrate and a photosensitive layer formed thereon, characterized in that the photosensitive layer contains a compound represented by the following formula (1), the ratio of the weight of the compound represented by the formula (1) to the weight content of all binder resins contained in the photosensitive layer is from 0.15 to 0.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: March 4, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Masayuki Hiroi, Hiroaki Takamura
  • Patent number: 8663883
    Abstract: A charge-transporting film includes a polymer of a compound represented by Formula (I): (Ra)n-Fa-Xa-Fa?-(Ra?)n???(I) wherein Fa and Fa? independently represent a charge-transporting sub-unit including an aromatic ring, Ra and Ra? independently represent a —CH?CH2 directly 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 —O—, —S—, and ester are combined, n and n? independently represent an integer of 0 or more (wherein n and n? are not simultaneously 0), and L represents a linking group which is represented by *—(CH2)n?—O—CH2— and which is bonded to the aromatic ring of the charge-transporting sub-unit, wherein n? is 1 or 2 and the linking group is bonded to the aromatic, ring of the charge-transporting sub-unit with *.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: March 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Takatsugu Doi, Yuko Iwadate, Tomoya Sasaki
  • Publication number: 20140045108
    Abstract: A imaging member, such as a photoreceptor, having an outermost layer that is a structured organic film (SOF) comprising a plurality of segments and a plurality of linkers including a first fluorinated segment, a second electroactive segment and fluorinated secondary components.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 13, 2014
    Applicant: XEROX CORPORATION
    Inventors: Sarah J. VELLA, Matthew A. HEUFT, Adrien P. COTE, Paul GERROIR
  • Patent number: 8647798
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer on the electroconductive substrate; and a protection layer on the photosensitive layer, wherein the protection layer includes a radical polymerizable compound having three or more radical polymerizable groups without a charge transportable group, a monofunctional radical polymerizable compound having a specific charge transportable group and a non-radical polymerizable compound having a specific charge transportable group.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoharu Asano, Hiroshi Ikuno, Akihiro Sugino, Hideo Nakamori, Mitsuaki Hirose
  • Publication number: 20140023963
    Abstract: An organic photoconductor includes: a conductive substrate; a charge generation layer on the conductive substrate; and a charge transport layer on the charge generation layer. An overcoat layer is formed on the charge transport layer. The overcoat layer is a latex polymer in which a charge transport material is dispersed.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 23, 2014
    Inventors: Zhang-Lin Zhou, Krzystof Nauka, Lihua Zhao, Hou T. Ng
  • Publication number: 20140004453
    Abstract: An electrophotographic photosensitive member has a laminated body, and a hole transporting layer formed on the laminated body, wherein the laminated body is a laminated body having a conductive support, an electron transporting layer and a charge generating layer. When an impedance is measured by forming a circular-shaped gold electrode having a thickness of 300 nm and a diameter of 10 mm on a surface of the charge generating layer of the laminated body by sputtering, and applying an alternating electric field of 100 mV and 0.1 Hz between the conductive support and the gold electrode, the laminated body of the electrophotographic photosensitive member satisfies the following expression (1): R_opt/R_dark?0.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 2, 2014
    Inventors: Kenichi Kaku, Michiyo Sekiya, Kunihiko Sekido, Atsushi Okuda, Nobuhiro Nakamura, Yota Ito, Hiroyuki Tomono, Yuka Ishiduka
  • Patent number: 8609310
    Abstract: 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).
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: December 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hitoshi Takimoto, Akira Hirano, Takatsugu Doi, Wataru Yamada, Katsumi Nukada
  • Publication number: 20130288170
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; a single-layer photosensitive layer that is provided on the conductive substrate and includes a binder resin, a charge generation material, a hole transport material, and an electron transport material, wherein a half decay exposure during positive charging is less than or equal to 0.18 ?J/cm2, and a half decay exposure during negative charging is 2 to 12 times the half decay exposure during positive charging.
    Type: Application
    Filed: December 13, 2012
    Publication date: October 31, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yohei SAITO, Koji BANDO, Shinya YAMAMOTO, Masahiro IWASAKI, Takayuki YAMASHITA, Jiro KORENAGA, Yuko YAMANO
  • Publication number: 20130288171
    Abstract: The present disclosure is drawn to electrostatic printing. In an example, a coated photoconductive substrate can comprise a photoconductive substrate, the photoconductive substrate including a substrate having a charge generation layer and charge transport layer adhered thereto; and a top coating adhered to the photoconductive substrate. The top coating can comprise a cross-linkable polymer, a cross-linker, and a charge transport material, where the charge transport material is dispersed throughout the top coating and may be present in the top coating in an amount ranging from 20 wt % to 50 wt %.
    Type: Application
    Filed: April 30, 2012
    Publication date: October 31, 2013
    Inventors: Sivapackia Ganapathiappan, Krzysztof Nauka, Hou T. Ng
  • Patent number: 8507163
    Abstract: A method of manufacturing an image bearing member including forming a charge generation layer overlying an electroconductive substrate, forming a charge transport layer overlying the charge generation layer, the charge transport layer including a charge transport material having a molecular weight of from 600 to 900 and a binder resin, and forming a protection layer overlying the charge transport layer by applying a liquid application containing a polymerizable compound having a charge transport structure, a polymerizable compound having no charge transport structure, a filler, a polycarboxylic acid compound, and cyclopentanone and curing the polymerizable compound having a charge transport structure, and the polymerizable compound having no charge transport structure.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: August 13, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Nozomu Tamoto, Hideo Nakamori, Mitsuaki Hirose
  • Patent number: 8486595
    Abstract: An image bearing member including an electroconductive substrate, a photosensitive layer overlying the electroconductive substrate, and a protection layer overlying the photosensitive layer, the photosensitive layer containing a diamine compound represented by the chemical structure 1, more of the diamine compound being disposed on the photosensitive layer side than the surface side relative to the midpoint in a depth direction of the protection layer: where X represents a substituted or non-substituted arylene group, or a compound represented by a chemical structure 2: where R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, where A1, A2, A3, and A4 independently represent an alkyl group having 1 to 4 carbon atoms, a substituted or non-substituted aryl group, or —CH2(CH2)mZ, where Z represents a substituted or non-substituted aryl group, a substituted or non-substituted cycloalkyl group, and a substituted or non-substituted
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: July 16, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Nozomu Tamoto, Mitsuaki Hirose, Hideo Nakamori
  • Patent number: 8486594
    Abstract: An object of the invention is to provide: a p-terphenyl compound mixture useful as a charge-transporting agent which has improved solubility in organic solvents to thereby diminish a cracking phenomenon, which poses problems concerning photoreceptor characteristics, and can realize an electrophotographic photoreceptor having high sensitivity and high durability; and an electrophotographic photoreceptor employing the compound mixture. The invention relates to: a p-terphenyl compound mixture which includes two symmetric p-terphenyl compounds respectively represented by the following general formula (1) and general formula (2) and an asymmetric p-terphenyl compound represented by the following general formula (3) which has both a group of substituents of the compound represented by general formula (1) and a group of substituents of the compound represented by general formula (2); and an electrophotographic photoreceptor containing the compound mixture.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: July 16, 2013
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Shinya Nagai, Atsushi Takesue, Makoto Koike, Katsumi Abe, Takehiro Nakajima
  • Patent number: 8481235
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover that contains a metal oxide, a phenolic resin, and a pentanediol ester; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: July 9, 2013
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Jin Wu, Nancy L. Belknap, Helen R. Cherniack, Marc J. Livecchi
  • Patent number: 8481234
    Abstract: An image bearing member including an electroconductive substrate, a photosensitive layer provided overlying the electroconductive substrate, and a furan derivative represented by the following chemical structure 1, where Ar1 and Ar2 independently represent substituted or non-substituted aryl groups and R1 represents an alkylene group having one to six carbon atoms.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: July 9, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hongguo Li, Kazukiyo Nagai, Yoshiaki Kawasaki
  • Patent number: 8460844
    Abstract: A imaging member, such as a photoreceptor, comprising a structured organic film comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may comprise at least one secondary component, such as an antioxidant.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: June 11, 2013
    Assignee: Xerox Corporation
    Inventors: Matthew A. Heuft, Adrien P. Cote, Greg McGuire, Nan-Xing Hu, Yvan Gagnon
  • Publication number: 20130137027
    Abstract: An organic photoconductor includes an inner charge generation layer for generating charges and an outer charge transport layer for facilitating charge transport. The charge transport layer comprises a semi-interpenetrating hole-transport polymer or oligomer network in which the polymer or oligomer is cross-linked. A process for forming a charge transport layer in an organic photoconductor is also provided.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Hou T. Ng
  • Patent number: 8450034
    Abstract: Provided is an electrophotographic photoreceptor exhibiting not only excellent durability together with high sensitivity but also excellent image reproduction, which is suitable for an image forming method by which imagewise exposure is performed employing a light source having an emission wavelength peak being in the range of 350-500 nm to form a high density electrostatic latent image on a photoreceptor, and also provided are an image forming method employing the electrophotographic photoreceptor, and an image forming apparatus thereof.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: May 28, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masanori Yumita, Toyoko Shibata, Shinichi Hamaguchi
  • Patent number: 8450033
    Abstract: To provide a latent electrostatic image bearing member including: an outermost surface layer that comprises a compound represented by the following General Formula (1) and a crosslinked resin formed by crosslinking between an isocyanate compound and a reactive charge transporting substance having at least two hydroxyl groups. where R1 and R2 may be identical or different and each represent a substituted or unsubstituted alkyl group; and R3 represents one of alkyl and aryl groups which have at least one hydroxyl group.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: May 28, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiro Sugino, Nobuya Mori
  • Publication number: 20130101929
    Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an uppermost surface layer thereof is constituted with a cured film of a composition that contains at least two kinds of reactive charge transporting materials selected from a first reactive charge transporting material having an —OH group as a reactive functional group and a second reactive charge transporting material having an —OCH3 group as a reactive functional group, fluororesin particles, and an alkyl fluoride group-containing copolymer having repeating units represented by the following Structural Formulae A and B, and a relative dielectric constant ?r of the uppermost surface layer satisfies the following Formula (1):
    Type: Application
    Filed: April 20, 2012
    Publication date: April 25, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Jiro KORENAGA, Keiko MATSUKI, Masahiro IWASAKI, Mitsuhide NAKAMURA
  • Publication number: 20130071780
    Abstract: [Problems] To provide a novel compound useful as an electric charge transporting agent having a high carrier mobility, and making it possible not only to stably form a photosensitive layer without precipitating crystals or developing pinholes when the photosensitive layer is being formed but also to prepare an organic photosensitive material for electrophotography featuring a high sensitivity and a low residual potential. [Means for Solution] The compound is represented by the following general formula (1); In the general formula (1), R1 to R7 are, for example, alkyl groups, X1 is, for example, —CH?CH—CH?CH2, X2 is, for example, —CH?CH2, and k and l are integers of 0 to 4.
    Type: Application
    Filed: June 22, 2011
    Publication date: March 21, 2013
    Applicant: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Shigetaka Numazawa, Katsumi Abe, Kiyotaka Ihara, Takehiro Nakajima, Makoto Koike
  • Patent number: 8377615
    Abstract: A photoconductor that includes a supporting substrate, a ground plane layer, a hole blocking layer, an adhesive layer, a photogenerating layer, and at least one charge transport layer of a charge transporting polycarbonate or a mixture of a charge transporting polycarbonate and a second polymer such as a polycarbonate.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: February 19, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8318394
    Abstract: A photoconductor that includes a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and at least one charge transport layer, and where the charge transport layer or layers contains a sulfonamide.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: November 27, 2012
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8309286
    Abstract: The invention provides an electrophotographic photoreceptor having at least a conductive substrate and a photosensitive layer formed on the conductive substrate wherein the outermost surface layer of the photoreceptor is composed of a cured material containing at least one compound represented by the formula (I) and a surfactant that contains, in the molecule thereof, at least one structure selected from (A) a structure that is obtained by polymerizing an acrylic monomer having a fluorine atom, (B) a structure having a carbon-carbon double bond and a fluorine atom, (C) an alkyleneoxide structure, and (D) a structure having a carbon-carbon triple bond and a hydroxy group. In formula (I), Q is an organic group having a valency of n and having hole transportability, R is a hydrogen atom or an alkyl group, L is a divalent organic group, n is 1 or more, and j is 0 or 1.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: November 13, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Takatsugu Doi, Akira Hirano, Hitoshi Takimoto
  • Patent number: 8309285
    Abstract: Disclosed is an electrophotographic imaging member that includes a substrate; a charge generating layer; a charge transport layer; and a protective overcoat layer having a polyol binder; a hole transport material; an acid catalyst; a leveling agent; and no melamine formaldehyde curing agent or cross-linking additive. Also disclosed is a process for forming a photoreceptor that includes providing a substrate; applying to it a charge generating layer, charge transport layer; and protective over coating layer having a polyol binder; a hole transport material; an acid catalyst; a leveling agent; and no melamine formaldehyde curing agent or cross-linking additive. Additionally provided is a method of forming an image with the disclosed electrophotographic imaging member.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: November 13, 2012
    Assignee: Xerox Corporation
    Inventors: Matthew A. Heuft, Hany Aziz, Kathy L. De Jong, Nan-Xing Hu
  • Patent number: 8304153
    Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: November 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Ryota Arai
  • Patent number: 8273510
    Abstract: The present invention provides an electrophotographic photoreceptor including a photosensitive layer on a conductive substrate, an outermost layer of the electrophotographic photoreceptor including a cured film of a composition which includes at least one charge transporting compound (a) having a charge transporting skeleton and at least two structural units represented by R—O—CO—CR??CH—R? in the same molecule, and at least one polycarbonate resin; a ratio (IA/IC) of an absorption peak intensity (IA) resulting from stretching vibration of a carbonyl group originating from the structural unit represented by R—O—CO—CR??CH—R? of the charge transporting compound (a) to an absorption peak intensity (IC) resulting from stretching vibration of a carbonyl group originating from the polycarbonate resin in an IR absorption spectrum of the outermost layer being from about 0.5 to about 10, and a width at half maximum of the absorption peak of the absorption peak intensity (IA) being about 25 cm?1 or more.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 25, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Tsuyoshi Miyamoto, Kenya Sonobe, Takatsugu Doi
  • Patent number: 8273511
    Abstract: The invention provides an electrophotographic photoreceptor having comprising at least an electrically conductive substrate and a photo-sensitive layer provided on the conductive substrate, the outermost layer is being a cured film of comprising a composition containing at least one compound (a) having a triphenylamine structure and four or more methacryloyl groups in one and the same molecule.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: September 25, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Takatsugu Doi, Hitoshi Takimoto, Akira Hirano
  • Patent number: 8257891
    Abstract: To provide an electrophotographic photoconductor including: a substrate; a charge generating layer; and a charge transporting layer, the charge generating layer and the charge transporting layer being disposed over the substrate, wherein the charge transporting layer contains a charge transporting material represented by General Formula (I) below and an additive represented by General Formula (II) below: where R1, R2 and R3 each independently denote any one of a hydrogen atom, a halogen atom, an alkyl group which may contain a substituent, and an alkoxy group which may contain a substituent, where R4 and R5 each denote a tertiary butyl group, and R6 and R7 each independently denote one of an alkyl group which may contain a substituent, and an aryl group which may contain a substituent.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: September 4, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoki Nakatake, Atsushi Takehara, Toshihiko Koizumi, Tsuyoshi Ueda, Tadayoshi Uchida, Hajime Suzuki
  • Patent number: 8241824
    Abstract: An electrophotographic photoreceptor comprising an electrically conductive support having thereon a photo sensitive layer having a laminated structure comprising a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a titanyl phthalocyanine pigment having a crystal structure exhibiting the following peaks of Bragg angles 2? (±0.2°) of X-ray powder diffraction employing a characteristic X-ray of a CuK? radiation (having a wavelength of 1.542 ?): at least a largest diffraction peak at 27.2°, major diffraction peaks at 9.4°, 9.6° and 24.0°, and a diffraction peak of a lowest angle at 7.3° while exhibiting no peak between the peaks of 7.3° and 9.4° and no peak at 26.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: August 14, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Akihiko Itami