Patents by Inventor Yoshiharu Otsuka

Yoshiharu Otsuka 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: 20230275231
    Abstract: A binder composition for an electrical storage device, may enable production of an electrical storage device electrode excellent in charge-discharge durability characteristic under high temperature by improving adhesiveness under high temperature and reducing internal resistance. Such a composition may include: a polymer (A) and a liquid medium (B), wherein, with respect to 100 parts by mass of total repeating units in the polymer (A), the polymer (A) contains: 15 to 60 parts by mass of repeating unit (a1) derived from a conjugated diene; 35 to 75 parts by mass of repeating unit (a2) derived from an aromatic vinyl compound; and 1 to 10 parts by mass of a repeating unit (a3) derived from an unsaturated carboxylic acid, and wherein, when, in dynamic viscoelasticity measurement of the polymer (A), a peak top of tan? (loss/storage elastic modulus) is tan8(Tp), and tan? at 100° C. is tan8(100° C.
    Type: Application
    Filed: March 31, 2021
    Publication date: August 31, 2023
    Applicant: ENEOS Materials Corporation
    Inventors: Takuya NAKAYAMA, Yoshiharu OTSUKA, Shodai KUROSUMI, Maki MAEGAWA
  • Publication number: 20220278330
    Abstract: A binder composition for an electrical storage device, may allow producing an electrical storage device electrode excellent in flexibility and adhesiveness, and show satisfactory charge-discharge durability. Such binder compositions may include: a polymer (A); and a liquid medium (B), wherein, with respect to 100 parts by mass in total of repeating units contained in the polymer (A), the polymer (A) contains: 20 parts by mass to 60 parts by mass of a repeating unit (a1) derived from a conjugated diene compound; 35 parts by mass to 75 parts by mass of a repeating unit (a2) derived from an aromatic vinyl compound; and 1 part by mass to 10 parts by mass of a repeating unit (a3) derived from an unsaturated carboxylic acid, and wherein a THF-soluble component of the polymer (A) has a weight average molecular weight of from 100,000 to 600,000.
    Type: Application
    Filed: August 18, 2020
    Publication date: September 1, 2022
    Applicant: ENEOS MATERIALS CORPORATION
    Inventors: Takuya NAKAYAMA, Yoshiharu OTSUKA, Souichi SAIJO
  • Patent number: 10505195
    Abstract: The present invention provides an electrical storage device binder composition that can produce an electrode that achieves improved charge-discharge characteristics. The composition includes a polymer (A) and a liquid medium (B), and further includes particles having a particle size of 10 to 50 micrometers in a number of 1,000 to 100,000 per mL.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 10, 2019
    Assignee: JSR CORPORATION
    Inventors: Shinsaku Ugawa, Tatsuaki Honda, Yoshiharu Otsuka, Takuya Nakayama, Daisuke Sukeguchi
  • Publication number: 20180258327
    Abstract: Provided are a composition for an adhesive, which has an adhesive characteristic that hardly changes along with a temperature change, and an adhesive film excellent in productivity, molding processability, and adhesive property. Also provided is a composition for an electrical storage device, which can form a layer excellent in adhesiveness with a current collector or a separator, and enables the production of an electrical storage device excellent in charge-discharge characteristic. The composition according to the present invention includes: heterophasic polymer particles (A); and a liquid medium (B), in which the heterophasic polymer particles (A) each have: a repeating unit derived from a conjugated diene; a repeating unit derived from an unsaturated carboxylic acid ester; and a repeating unit derived from an unsaturated carboxylic acid.
    Type: Application
    Filed: August 5, 2016
    Publication date: September 13, 2018
    Applicant: JSR CORPORATION
    Inventors: Naruki TANAKA, Jian LIU, Toshiyuki ITOU, Nobuhiro MATSUDA, Yoshiharu OTSUKA
  • Patent number: 9966606
    Abstract: A binder composition for power storage devices comprising a polymer which contains at least 3 to 40 mass % of a first recurring unit derived from an unsaturated carboxylic acid ester having an alicyclic hydrocarbon group and 1 to 40 mass % of a second recurring unit derived from an ?, ?-unsaturated nitrile compound based on 100 mass % of the total of all recurring units.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: May 8, 2018
    Assignee: JSR CORPORATION
    Inventors: Yoshiharu Otsuka, Nobuyuki Fujihara, Hiroyuki Miyauchi
  • Patent number: 9758629
    Abstract: A composition for forming a protective film that is placed between a positive electrode and a negative electrode of an electrical storage device, includes polymer particles (A1), polymer particles (A2), and a liquid medium, the polymer particles (A1) including a repeating unit derived from a compound that includes two or more polymerizable unsaturated groups in an amount of less than 15 parts by mass based on 100 parts by mass of the polymer particles (A1), and the polymer particles (A2) including a repeating unit derived from a compound that includes two or more polymerizable unsaturated groups in an amount of 20 to 100 parts by mass based on 100 parts by mass of the polymer particles (A2).
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: September 12, 2017
    Assignee: JSR CORPORATION
    Inventors: Kouhei Katsuda, Yoshiharu Otsuka, Kazuaki Itou, Ichiro Kajiwara, Hiroyuki Miyauchi
  • Publication number: 20170149064
    Abstract: The present invention provides an electrical storage device binder composition that can produce an electrode that achieves improved charge-discharge characteristics. The composition includes a polymer (A) and a liquid medium (B), and further includes particles having a particle size of 10 to 50 micrometers in a number of 1,000 to 100,000 per mL.
    Type: Application
    Filed: June 23, 2015
    Publication date: May 25, 2017
    Applicant: JSR CORPORATION
    Inventors: Shinsaku UGAWA, Tatsuaki HONDA, Yoshiharu OTSUKA, Takuya NAKAYAMA, Daisuke SUKEGUCHI
  • Patent number: 9522995
    Abstract: An electrical storage device includes a cathode, an anode, a protective film that is provided between the cathode and the anode, and an electrolyte solution, the protective film including a polymer that includes a repeating unit derived from a fluorine-containing monomer, and a repeating unit derived from an unsaturated carboxylic acid.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: December 20, 2016
    Assignee: JSR Corporation
    Inventors: Yoshiharu Otsuka, Hironori Kitaguchi, Nobuyuki Fujihara
  • Patent number: 9520242
    Abstract: An electrode binder composition that is used to produce an electrode used for an electrical storage device, includes (A) a polymer, (B) a carboxylic acid or a salt thereof, and (C) a liquid medium, and has a concentration of the carboxylic acid or a salt thereof (B) of 20 to 1000 ppm.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: December 13, 2016
    Assignee: JSR CORPORATION
    Inventors: Hironori Kitaguchi, Yoshiharu Otsuka, Nobuyuki Fujihara, Tatsuaki Honda
  • Publication number: 20160079007
    Abstract: A binder composition for power storage devices comprising a polymer which contains at least 3 to 40 mass % of a first recurring unit derived from an unsaturated carboxylic acid ester having an alicyclic hydrocarbon group and 1 to 40 mass % of a second recurring unit derived from an ?,?-unsaturated nitrile compound based on 100 mass % of the total of all recurring units.
    Type: Application
    Filed: March 25, 2014
    Publication date: March 17, 2016
    Applicant: JSR CORPORATION
    Inventors: Yoshiharu OTSUKA, Nobuyuki FUJIHARA, HIroyuki MIYAUCHI
  • Publication number: 20150240039
    Abstract: A composition for forming a protective film that is placed between a positive electrode and a negative electrode of an electrical storage device, includes polymer particles (A1), polymer particles (A2), and a liquid medium, the polymer particles (A1) including a repeating unit derived from a compound that includes two or more polymerizable unsaturated groups in an amount of less than 15 parts by mass based on 100 parts by mass of the polymer particles (A1), and the polymer particles (A2) including a repeating unit derived from a compound that includes two or more polymerizable unsaturated groups in an amount of 20 to 100 parts by mass based on 100 parts by mass of the polymer particles (A2).
    Type: Application
    Filed: August 22, 2013
    Publication date: August 27, 2015
    Applicant: JSR CORPORATION
    Inventors: Kouhei Katsuda, Yoshiharu Otsuka, Kazuaki Itou, Ichiro Kajiwara, Hiroyuki Miyauchi
  • Publication number: 20150213968
    Abstract: An electrode binder composition that is used to produce an electrode used for an electrical storage device, includes (A) a polymer, (B) a carboxylic acid or a salt thereof, and (C) a liquid medium, and has a concentration of the carboxylic acid or a salt thereof (B) of 20 to 1000 ppm.
    Type: Application
    Filed: April 6, 2015
    Publication date: July 30, 2015
    Applicant: JSR CORPORATION
    Inventors: Hironori KITAGUCHI, Yoshiharu OTSUKA, Nobuyuki FUJIHARA, Tatsuaki HONDA
  • Publication number: 20140272523
    Abstract: An electrical storage device includes a cathode, an anode, a protective film that is provided between the cathode and the anode, and an electrolyte solution, the protective film including a polymer that includes a repeating unit derived from a fluorine-containing monomer, and a repeating unit derived from an unsaturated carboxylic acid.
    Type: Application
    Filed: October 4, 2012
    Publication date: September 18, 2014
    Applicant: JSR CORPORATION
    Inventors: Yoshiharu Otsuka, Hironori Kitaguchi, Nobuyuki Fujihara
  • Publication number: 20130052530
    Abstract: An electrode binder composition that is used to produce an electrode used for an electrical storage device, includes (A) a polymer, (B) a carboxylic acid or a salt thereof, and (C) a liquid medium, and has a concentration of the carboxylic acid or a salt thereof (B) of 20 to 1000 ppm.
    Type: Application
    Filed: August 30, 2012
    Publication date: February 28, 2013
    Applicant: JSR Corporation
    Inventors: Hironori KITAGUCHI, Yoshiharu Otsuka, Nobuyuki Fujihara, Tatsuaki Honda