Patents by Inventor Tomonori KURATA

Tomonori KURATA 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: 20210296651
    Abstract: The present invention relates to a copolymer for a binder for a non-aqueous battery electrode, which ensures sufficient binding properties between active materials and between the active materials and a current collector, suppresses generation of aggregates in a slurry containing the electrode active material, suppresses generation of cracks in an electrode active material layer, and sufficiently ensures peel strength of the electrode active material layer against the current collector. The copolymer for a binder for a non-aqueous battery electrode is a copolymer (P) of a monomer mixture (M) containing a monomer (A) represented by general formula (1), a (meth)acrylic acid monomer (B), and a monomer (C) represented by general formula (2), wherein a content of a structure derived from the monomer (A) in the copolymer (P) is 0.5 to 20.0 mass % and a content of a structure derived from the monomer (C) in the copolymer (P) is 0.5 to 20.0 mass %.
    Type: Application
    Filed: July 12, 2019
    Publication date: September 23, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Tomonori KURATA, Shuhei MARUTA, Kirida KUNANURUKSAPONG, Mitsuru HANASAKI
  • Patent number: 11063260
    Abstract: An aqueous binder composition for a secondary battery electrode containing a silane coupling agent without ethylenically unsaturated bonds, a resin which is a polymer of at least one kind of ethylenically unsaturated monomers, a resin which is a polymer of at least one kind of ethylenically unsaturated monomer, and at least one kind of solvent selected from water and a hydrophilic solvent. The amount of silane coupling agent is from 0.5 to 9 parts by mass based on 100 parts by mass of ethylenically unsaturated monomer. The pH of the composition is 2.5 to 8.0. Also disclosed is a binder obtained by curing the aqueous binder composition, a slurry containing the aqueous binder composition and an active material, a secondary battery electrode obtained by curing the slurry, and a secondary battery including the secondary battery electrode.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: July 13, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Mitsuru Hanasaki, Tomonori Kurata, Junya Uchiyashiki, Yasuhiro Nakagawa
  • Patent number: 10957909
    Abstract: A binder composition for nonaqueous battery electrodes essentially contains (A) an ethylenically unsaturated monomer and (B) a surfactant, and further satisfies any two or more conditions of the following (I) to (III): (I) (A) the ethylenically unsaturated monomer includes (a) a phosphoric acid group-containing ethylenically unsaturated monomer; (II) (B) the surfactant comprises (b) a phosphoric acid group-containing surfactant; and (III) the composition including (C) a neutralizing agent containing an alkali metal compound and/or an alkali earth metal compound.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: March 23, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Junya Uchiyashiki, Mitsuru Hanasaki, Tomonori Kurata
  • Publication number: 20200395613
    Abstract: The invention relates to a method for producing a slurry for a nonaqueous battery electrode, a method for producing a nonaqueous battery electrode, and a method for producing a nonaqueous battery. The method for producing a slurry for a nonaqueous battery electrode includes a dispersing step of dispersing a conductive auxiliary agent in an aqueous binder composition, and a mixing step of mixing the conductive auxiliary agent-containing binder composition obtained in the dispersing step with an active material. In the conductive auxiliary agent-containing binder composition, a particle diameter at which particles begin to appear, which is measured according to a degree of dispersion by a grain gauge method, is 90 ?m or less.
    Type: Application
    Filed: November 16, 2018
    Publication date: December 17, 2020
    Applicant: SHOWA DENKO K. K.
    Inventors: Tomonori KURATA, Kirida KUNANURUKSAPONG, Mitsuru HANASAKI
  • Publication number: 20200350590
    Abstract: A binder for a nonaqueous battery electrode, the nonaqueous battery electrode using the binder for the nonaqueous battery electrode, and a nonaqueous battery. The binder for a nonaqueous battery electrode contains a copolymer (P) of an ethylenically unsaturated monomer (A) essentially containing a styrene-based monomer (a1) and a (meta)acrylic ester (a2), and a surfactant (B1) having an ethylenically unsaturated bond, wherein the total amount of structure units derived from the surfactant (B1) having the ethylenically unsaturated bond in the copolymer (P) and the surfactant (B2) not contained in the copolymer (P) is 0.10 to 1.00 parts by mass based on 100 parts by mass of the copolymer (P). Also disclosed is a method for producing the binder.
    Type: Application
    Filed: December 26, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K. K.
    Inventors: Junya UCHIYASHIKI, Mitsuru HANASAKI, Tomonori KURATA
  • Publication number: 20190020035
    Abstract: An aqueous binder composition for a secondary battery electrode containing a silane coupling agent without ethylenically unsaturated bonds, a resin which is a polymer of at least one kind of ethylenically unsaturated monomers, a resin which is a polymer of at least one kind of ethylenically unsaturated monomer, and at least one kind of solvent selected from water and a hydrophilic solvent. The amount of silane coupling agent is from 0.5 to 9 parts by mass based on 100 parts by mass of ethylenically unsaturated monomer. The pH of the composition is 2.5 to 8.0. Also disclosed is a binder obtained by curing the aqueous binder composition, a slurry containing the aqueous binder composition and an active material, a secondary battery electrode obtained by curing the slurry, and a secondary battery including the secondary battery electrode.
    Type: Application
    Filed: December 28, 2016
    Publication date: January 17, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Mitsuru HANASAKI, Tomonori KURATA, Junya UCHIYASHIKI, Yasuhiro NAKAGAWA
  • Publication number: 20180301704
    Abstract: A binder composition for nonaqueous battery electrodes essentially contains (A) an ethylenically unsaturated monomer and (B) a surfactant, and further satisfies any two or more conditions of the following (I) to (III): (I) (A) the ethylenically unsaturated monomer includes (a) a phosphoric acid group-containing ethylenically unsaturated monomer; (II) (B) the surfactant comprises (b) a phosphoric acid group-containing surfactant; and (III) the composition including (C) a neutralizing agent containing an alkali metal compound and/or an alkali earth metal compound.
    Type: Application
    Filed: June 1, 2016
    Publication date: October 18, 2018
    Applicant: SHOWA DENKO K.K.
    Inventors: Junya UCHIYASHIKI, Mitsuru HANASAKI, Tomonori KURATA
  • Patent number: 9947929
    Abstract: A binder composition for nonaqueous battery electrodes is prepared by adding a small amount of an acetylene glycol compound to an aqueous polymer emulsion obtained by emulsion polymerization of a monomer mixture comprising from 15 to 70% by mass of styrene (a), from 20 to 80% by mass of an ethylenically unsaturated carboxylate (b), from 1 to 10% by mass of an ethylenically unsaturated carboxylic acid (c), from 0.1 to 5% by mass of a crosslinkable ethylenically unsaturated monomer (d), and from 0 to 20% by mass of another monoethylenically unsaturated monomer (e). When the above binder composition is used, an active material is not peeled off in the step of cutting a collector even when a small amount of the binder is used, and a nonaqueous battery excellent in a charge-discharge cycle property can be produced.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: April 17, 2018
    Assignee: SHOWA DENKO K.K.
    Inventors: Tomonori Kurata, Mitsuru Hanasaki, Junya Uchiyashiki
  • Publication number: 20160248095
    Abstract: A binder composition for nonaqueous battery electrodes is prepared by adding a small amount of an acetylene glycol compound to an aqueous polymer emulsion obtained by emulsion polymerization of a monomer mixture comprising from 15 to 70% by mass of styrene (a), from 20 to 80% by mass of an ethylenically unsaturated carboxylate (b), from 1 to 10% by mass of an ethylenically unsaturated carboxylic acid (c), from 0.1 to 5% by mass of a crosslinkable ethylenically unsaturated monomer (d), and from 0 to 20% by mass of another monoethylenically unsaturated monomer (e). When the above binder composition is used, an active material is not peeled off in the step of cutting a collector even when a small amount of the binder is used, and a nonaqueous battery excellent in a charge-discharge cycle property can be produced.
    Type: Application
    Filed: June 20, 2014
    Publication date: August 25, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Tomonori KURATA, Mitsuru HANASAKI, Junya UCHIYASHIKI
  • Publication number: 20150357647
    Abstract: The present invention provides a binder for lithium ion secondary battery electrodes that is obtained by emulsion polymerization of an ethylenically unsaturated monomer in an aqueous medium in the presence of a surfactant, the ethylenically unsaturated monomer being composed, with respect to the total mass of the ethylenically unsaturated monomer, of 15% by mass to 70% by mass of styrene, 1% by mass to 10% by mass of an N atom-containing ethylenically unsaturated monomer, 1% by mass to 10% by mass of an ethylenically unsaturated carboxylic acid, 0.1% by mass to 5% by mass of an internal crosslinking agent, and 22% by mass to 82.9% by mass of another ethylenically unsaturated monomer that is copolymerizable with these substances, and has a glass transition temperature of ?55° C. to 30° C.
    Type: Application
    Filed: January 20, 2014
    Publication date: December 10, 2015
    Applicant: SHOWA DENKO K.K.
    Inventors: Tomonori KURATA, Mitsuru HANASAKI, Kazunari FUKASE