Patents by Inventor Hidetake ISHII

Hidetake ISHII 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: 20210119214
    Abstract: Provided is a composition for a functional layer capable of forming a functional layer that can both inhibit post-cycling swelling of a secondary battery and increase charge carrier acceptance of the secondary battery at low temperatures. The composition for a functional layer contains non-conductive inorganic particles, a solvent, and a block copolymer including a block region formed of an aromatic vinyl monomer unit and a block region formed of either or both of an aliphatic conjugated diene monomer unit having a carbon number of 5 or more and a hydrogenated aliphatic conjugated diene monomer unit having a carbon number of 5 or more.
    Type: Application
    Filed: April 2, 2019
    Publication date: April 22, 2021
    Applicant: ZEON CORPORATION
    Inventors: Hidetake ISHII, Norikazu YAMAMOTO
  • Publication number: 20210098789
    Abstract: Provided is a binder composition capable of forming a functional layer that can both inhibit post-cycling swelling of a secondary battery and increase charge carrier acceptance of the secondary battery at low temperatures. The binder composition contains a first polymer, a second polymer, and a solvent. The first polymer is a block copolymer including a block region formed of an aromatic vinyl monomer unit and a block region formed of an aliphatic conjugated diene monomer unit and/or a hydrogenated aliphatic conjugated diene monomer unit. The second polymer is a random copolymer including a 1,3-pentadiene unit and/or a hydrogenated 1,3-pentadiene unit.
    Type: Application
    Filed: April 2, 2019
    Publication date: April 1, 2021
    Applicant: ZEON CORPORATION
    Inventors: Hidetake ISHII, Norikazu YAMAMOTO
  • Patent number: 10934399
    Abstract: A method for producing a polymer latex, including an emulsification step of emulsifying a polymer solution obtained by dissolution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer having a molecular weight distribution of 1.0 to 2.6 in an organic solvent, in water in the presence of a surfactant, to thereby obtain an emulsified liquid, wherein as the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, used are/is synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer which, when dissolved in an organic solvent to thereby be formed into a polymer solution having a viscosity at a temperature of 60° C. of 20,000 cps, have/has a solid content concentration in the range of 10 to 60% by weight.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: March 2, 2021
    Assignee: ZEON CORPORATION
    Inventors: Hidetake Ishii, Junji Kodemura
  • Publication number: 20210040246
    Abstract: A latex of an acid-modified conjugated diene polymer including the acid-modified conjugated diene polymer obtained by modifying a conjugated diene polymer with an acid group-containing compound, in which a content of a structural unit derived from the acid group-containing compound is 0.2 to 0.7 parts by weight with respect to 100 parts by weight of the acid-modified conjugated diene polymer; a content of a water-soluble polymer in the latex is 2 parts by weight or less with respect to 100 parts by weight of the acid-modified conjugated diene polymer; when a solids content of the latex is adjusted to 60 wt %, a viscosity at 25° C. is 800 mPa·s or less; and when the solids content of the latex is adjusted to 50 wt %, the viscosity at 25° C. is 300 mPa·s or less.
    Type: Application
    Filed: February 22, 2019
    Publication date: February 11, 2021
    Applicant: ZEON CORPORATION
    Inventors: Yoshitaka SATOH, Hidetake ISHII, Junji KODEMURA
  • Patent number: 10759926
    Abstract: A polymer latex, including a polymerization step of polymerizing a monomer in organic solvent to thereby obtain polymer solution of synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, antioxidant addition step of adding antioxidant to the polymer solution of synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer at proportion of 0.01-1.00 parts by weight per 100 parts by weight of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, and emulsification step of emulsifying the polymer solution which the antioxidant is added, in water in the presence of a surfactant, to thereby obtain polymer latex, wherein the emulsification performs in the emulsification step so the ratio D75/D25 of the volume particle size D75 at a cumulative frequency of 75% to the volume particle size D25 at a cumulative frequency of 25% of a particle of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer included in the polymer latex is 1.90 or more and 2.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: September 1, 2020
    Assignee: ZEON CORPORATION
    Inventors: Hidetake Ishii, Junji Kodemura
  • Publication number: 20200255574
    Abstract: Provided is a binder composition for a non-aqueous secondary battery electrode capable of forming an electrode for a non-aqueous secondary battery that can cause a non-aqueous secondary battery to display excellent low-temperature cycle characteristics and low-temperature output characteristics. The binder composition for a non-aqueous secondary battery electrode contains a polymer and a solvent. The polymer is a block copolymer including an aromatic vinyl monomer unit and an aliphatic conjugated diene monomer unit having a carbon number of 5 or more. The amount of the polymer that elutes into electrolyte solution is not less than 1 mass % and not more than 20 mass %.
    Type: Application
    Filed: July 5, 2018
    Publication date: August 13, 2020
    Applicant: ZEON CORPORATION
    Inventors: Hidetake ISHII, Norikazu YAMAMOTO, Yusaku MATSUO
  • Publication number: 20200243861
    Abstract: Provided is a binder composition for a non-aqueous secondary battery with which it is possible to form a functional layer that can provide a battery component such as an electrode or a separator with a balance of excellent handleability and process adhesiveness. The binder composition for a non-aqueous secondary battery contains: polymer particles containing a block polymer including a block region composed of an aromatic vinyl monomer unit; a water-soluble polymer including a hydrophilic group; and water. The block polymer has a diblock content of not less than 0 mass % and not more than 60 mass %. The water-soluble polymer has a weight-average molecular weight of not less than 15,000 and not more than 500,000.
    Type: Application
    Filed: August 23, 2018
    Publication date: July 30, 2020
    Applicant: ZEON CORPORATION
    Inventors: Norikazu YAMAMOTO, Yusaku MATSUO, Hidetake ISHII, Shunjin AIHARA
  • Publication number: 20200152985
    Abstract: A binder composition for a non-aqueous secondary battery including: a water-insoluble polymer and a water-soluble polymer, wherein the water-insoluble polymer contains 70% by weight or more and 100% by weight or less of an aliphatic conjugated diene monomer unit, and the water-soluble polymer has a carboxy group and a hydroxy group. The water-soluble polymer preferably contains a carboxy group-containing monomer unit and a hydroxy group-containing monomer unit. Also provided are a slurry composition for a non-aqueous secondary battery, including the binder composition, an electrode, a separator, a secondary battery and methods for producing the same.
    Type: Application
    Filed: March 5, 2018
    Publication date: May 14, 2020
    Applicant: ZEON CORPORATION
    Inventors: Norikazu YAMAMOTO, Hidetake ISHII, Yusaku MATSUO
  • Publication number: 20190031865
    Abstract: A polymer latex, including a polymerization step of polymerizing a monomer in organic solvent to thereby obtain polymer solution of synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, antioxidant addition step of adding antioxidant to the polymer solution of synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer at proportion of 0.01-1.00 parts by weight per 100 parts by weight of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, and emulsification step of emulsifying the polymer solution which the antioxidant is added, in water in the presence of a surfactant, to thereby obtain polymer latex, wherein the emulsification performs in the emulsification step so the ratio D75/D25 of the volume particle size D75 at a cumulative frequency of 75% to the volume particle size D25 at a cumulative frequency of 25% of a particle of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer included in the polymer latex is 1.90 or more and 2.
    Type: Application
    Filed: January 26, 2017
    Publication date: January 31, 2019
    Applicant: ZEON CORPORATION
    Inventors: Hidetake ISHII, Junji KODEMURA
  • Publication number: 20190023854
    Abstract: A method for producing a polymer latex, including an emulsification step of emulsifying a polymer solution obtained by dissolution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer having a molecular weight distribution of 1.0 to 2.6 in an organic solvent, in water in the presence of a surfactant, to thereby obtain an emulsified liquid, wherein as the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, used are/is synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer which, when dissolved in an organic solvent to thereby be formed into a polymer solution having a viscosity at a temperature of 60° C. of 20,000 cps, have/has a solid content concentration in the range of 10 to 60% by weight.
    Type: Application
    Filed: January 26, 2017
    Publication date: January 24, 2019
    Applicant: ZEON CORPORATION
    Inventors: Hidetake ISHII, Junji KODEMURA