Patents by Inventor Kouichirou Maeda

Kouichirou Maeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180190998
    Abstract: Provided is electrically conductive ink that shows favorable flowability and that can also suppress deformation, such as flattening, upon application of surface pressure. The electrically conductive ink is applied onto a substrate 21 of a separator 11 that constitutes a cell 13 of a fuel cell stack by way of screen printing so as to form ribs 22 on the substrate 21, wherein the electrically conductive ink has viscoelasticity, as measured by a rotary rheometer, that exhibits a loss tangent of 1 with a strain of 10 to 100%.
    Type: Application
    Filed: October 22, 2015
    Publication date: July 5, 2018
    Applicant: ZEON CORPORATION
    Inventors: Kouichirou MAEDA, Kenichi TOKUDA
  • Publication number: 20180134880
    Abstract: An aqueous dispersion which contains a conjugated diene polymer as the main component is contained at a solid content weight of 70 to 97 wt %.
    Type: Application
    Filed: June 13, 2016
    Publication date: May 17, 2018
    Applicant: ZEON CORPORATION
    Inventor: Kouichirou MAEDA
  • Publication number: 20180062162
    Abstract: An all-solid-state secondary battery includes a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer, and a solid electrolyte layer between the positive and negative electrode active material layers. The solid electrolyte layer has a thickness of 2 to 20 ?m. The solid electrolyte layer includes a binder containing a particulate polymer having an average particle diameter of 0.1 to 1 ?m.
    Type: Application
    Filed: February 3, 2016
    Publication date: March 1, 2018
    Applicant: ZEON CORPORATION
    Inventor: Kouichirou MAEDA
  • Publication number: 20170346130
    Abstract: The double-sided tape for fixing an electrode constituent body is used in an electrochemical device that houses in a pouch-type outer casing an electrode constituent body wherein a positive electrode member, a separator member and a negative electrode member are layered or wound. The double-sided tape comprises a surface having a pressure-sensitive adhesive for adhering to the electrode constituent body, and a surface having a heat-sensitive adhesive for adhering to the pouch-type outer casing.
    Type: Application
    Filed: October 23, 2015
    Publication date: November 30, 2017
    Applicant: ZEON CORPORATION
    Inventors: Kouichirou MAEDA, Taku MATSUMURA, Kunihito ARAI
  • Publication number: 20170309889
    Abstract: The present invention relates to a binder composition for lithium-ion secondary battery electrodes. Recently, there is a need for a lithium-ion secondary battery which has the excellent property of accommodating an abnormal situation so that in cases when the battery has heated up abnormally or is in an abnormally high-temperature environment, the battery can lower the charge/discharge performance thereof. The present invention solves the above-mentioned problem by using, as a binder for electrodes, composite polymer particles obtained by polymerizing, in an aqueous medium, a monomer solution containing a polymer.
    Type: Application
    Filed: October 23, 2015
    Publication date: October 26, 2017
    Applicant: ZEON CORPORATION
    Inventors: Azusa MASUDA, Hiroki OGURO, Kouichirou MAEDA
  • Patent number: 9601726
    Abstract: A sealing material for secondary battery contains a conjugated diene-based polymer and a cyclic olefin-based polymer. The weight ratio between the conjugated diene-based polymer and the cyclic olefin-based polymer, as expressed in (conjugated diene-based polymer/cyclic olefin-based polymer), ranges from 40/60 to 80/20, and the total amount of the diene-based polymer and the cyclic olefin-based polymer is 80 wt % or more of an entire amount.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: March 21, 2017
    Assignee: ZEON CORPORATION
    Inventor: Kouichirou Maeda
  • Publication number: 20160064745
    Abstract: An aqueous electroconductive paste for a fuel cell separator containing an electroconductive material and a binder, wherein the binder is a polymer obtained by polymerizing in the presence of an alcoholic-hydroxyl-group-containing polymer.
    Type: Application
    Filed: November 12, 2015
    Publication date: March 3, 2016
    Applicant: ZEON CORPORATION
    Inventor: Kouichirou MAEDA
  • Patent number: 9276263
    Abstract: An all-solid state secondary cell which has a positive electrode active material layer, negative electrode active material layer, and solid electrolyte layer, wherein at least one of said positive electrode active material layer, said negative electrode active material layer, and said solid electrolyte layer includes an inorganic solid electrolyte and a binder comprised of an average particle size 30 to 300 nm particulate-shaped polymer and said particulate-shaped polymer is present in said positive electrode active material layer, said negative electrode active material layer, and said solid electrolyte layer in a state holding the particulate state, is provided.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: March 1, 2016
    Assignee: ZEON CORPORATION
    Inventors: Naoki Yoshida, Kouichirou Maeda
  • Publication number: 20150188099
    Abstract: A sealing material for secondary battery contains a conjugated diene-based polymer and a cyclic olefin-based polymer. The weight ratio between the conjugated diene-based polymer and the cyclic olefin-based polymer, as expressed in (conjugated diene-based polymer/cyclic olefin-based polymer), ranges from 40/60 to 80/20, and the total amount of the diene-based polymer and the cyclic olefin-based polymer is 80 wt % or more of an entire amount.
    Type: Application
    Filed: September 5, 2013
    Publication date: July 2, 2015
    Applicant: ZEON CORPORATION
    Inventor: Kouichirou Maeda
  • Publication number: 20150041729
    Abstract: An aqueous electroconductive paste for a fuel cell separator containing an electroconductive material and a binder, wherein the binder is a polymer contained by polymerizing in the presence of an alcoholic-hydroxyl-group-containing polymer.
    Type: Application
    Filed: February 21, 2013
    Publication date: February 12, 2015
    Inventor: Kouichirou Maeda
  • Publication number: 20140127579
    Abstract: An all-solid state secondary cell which has a positive electrode active material layer, negative electrode active material layer, and solid electrolyte layer, wherein at least one of said positive electrode active material layer, said negative electrode active material layer, and said solid electrolyte layer includes an inorganic solid electrolyte and a binder comprised of an average particle size 30 to 300 nm particulate-shaped polymer and said particulate-shaped polymer is present in said positive electrode active material layer, said negative electrode active material layer, and said solid electrolyte layer in a state holding the particulate state, is provided.
    Type: Application
    Filed: June 11, 2012
    Publication date: May 8, 2014
    Applicant: ZEON CORPORATION
    Inventors: Naoki Yoshida, Kouichirou Maeda
  • Publication number: 20130183519
    Abstract: An adhesive film for organic electrolyte-type energy storage device having a substrate film comprised of a resin composition which contains a cross-linked cyclic olefin polymer and an elastomer, and having an adhesive layer comprised of an acrylic-based adhesive agent which is formed on the substrate film is provided.
    Type: Application
    Filed: September 22, 2011
    Publication date: July 18, 2013
    Applicant: ZEON CORPORATION
    Inventor: Kouichirou Maeda
  • Patent number: 8147953
    Abstract: An object of the invention is to provide a laminate which is good in adhesiveness between a substrate and a thin film laminated thereon by a dry film-forming method such as a chemical vapor growth method or a vacuum evaporation method even if the substrate is a polymer substrate made of a nonpolar polymer; and a process for producing the same. In order to attain the above-mentioned object, the invention provides a laminate comprising a polymer substrate, a primer layer comprising a cyclized rubber which is a conjugated diene polymer cyclized product or a derivative thereof, the layer being formed on the surface of the polymer substrate, and a thin film laminated on the surface of the primer layer by a dry film-forming method; and a process for producing the same.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: April 3, 2012
    Assignee: Zeon Corporation
    Inventors: Shizuo Kitahara, Tetsuya Toyoshima, Kouichirou Maeda, Junji Kodemura, Yutaka Katoh
  • Publication number: 20060127655
    Abstract: An object of the invention is to provide a laminate which is good in adhesiveness between a substrate and a thin film laminated thereon by a dry film-forming method such as a chemical vapor growth method or a vacuum evaporation method even if the substrate is a polymer substrate made of a nonpolar polymer; and a process for producing the same. In order to attain the above-mentioned object, the invention provides a laminate comprising a polymer substrate, a primer layer comprising a cyclized rubber which is a conjugated diene polymer cyclized product or a derivative thereof, the layer being formed on the surface of the polymer substrate, and a thin film laminated on the surface of the primer layer by a dry film-forming method; and a process for producing the same.
    Type: Application
    Filed: January 20, 2004
    Publication date: June 15, 2006
    Inventors: Shizuo Kitahara, Tetsuya Toyoshima, Kouichirou Maeda, Junji Kodemura, Yutaka Katoh
  • Patent number: 6881517
    Abstract: A binder for a lithium ion secondary battery characterized by comprising a polymer containing structural units derived from 1,3-butadiene, said polymer having a 1,2-vinyl structure content in the range of 2% to 25% by mole. A lithium ion secondary battery provided with an electrode made using this binder exhibits improved characteristics at repetition of charge-discharge cycle and improved storage stability.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: April 19, 2005
    Assignee: Zeon Corporation
    Inventors: Atsuhiro Kanzaki, Kouichirou Maeda, Haruhisa Yamamoto
  • Patent number: 6770397
    Abstract: A binder composition comprising a polymer dispersed in a liquid dispersion medium, wherein the polymer comprises structural units represented by the following formula: wherein R1 is hydrogen, C1-4 alkyl group, or halogen, R2 is C1-20 alkyl group or C6-30 aryl group, R3 and R4 are hydrogen or methyl group, provided that R3 and R4 are not simultaneously methyl group, and n is an integer of 1-50. A lithium ion secondary battery having an electrode made by using this binder composition exibibits excellent characteristics at repetition of a charge-discharge cycle.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: August 3, 2004
    Assignee: Zeon Corporation
    Inventors: Kouichirou Maeda, Masahiro Yamakawa, Katsuya Nakamura, Fumio Takano
  • Patent number: 6573004
    Abstract: A binder for an electrode of a non-aqueous electrolyte secondary battery comprising a vinyl alcohol polymer having 30 to 95% by weight of recurring units expressed by the following formula (1): A slurry containing this binder, an active material and a liquid medium is used to produce an electrode. A non-aqueous electrolyte secondary battery having the electrode as a positive electrode and/or a negative electrode exhibits a minimized reduction in capacity at repeated charge-discharge cycles.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: June 3, 2003
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Ichirou Igarashi, Keiko Imai, Kouichirou Maeda
  • Patent number: 6043308
    Abstract: Conductive rubber compositions comprising a vulcanizate of a rubber component (A), a rubber component (B) vulcanized by a mechanism different from that in the rubber component (A), and conductive particles, a production process thereof, conductive rubber members making use of such a conductive rubber composition, a production process of the conductive rubber members, conductive rubber-covered rolls, and image forming apparatus equipped with the conductive rubber-covered roll are provided.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: March 28, 2000
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Naoki Tanahashi, Kouichirou Maeda