Patents by Inventor Naohiro IGARI

Naohiro IGARI 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).

  • Patent number: 11236218
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber and a metal compound including a trivalent or higher metal, wherein a content of the metal compound is 0.1 to 1.5 parts by weight, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: February 1, 2022
    Assignee: ZEON CORPORATION
    Inventors: Naohiro Igari, Misa Yamamoto, Masaru Kitagawa, Shinji Kato
  • Patent number: 11234469
    Abstract: A dip-formed article includes a laminate in which a rubber layer is laminated on a fiber base material. The thickness of the rubber layer is 0.2 to 0.8 mm, the rubber constituting the rubber layer penetrates into the fiber base material, the maximum depth to which the rubber has penetrated into the fiber base material is 0.1 to 0.3 mm, and the maximum stress at 50% elongation of the laminate is 20 N or smaller.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 1, 2022
    Assignee: ZEON CORPORATION
    Inventors: Naohiro Igari, Shinji Kato, Tetsuya Akabane, Tomoya Taniyama
  • Patent number: 10907002
    Abstract: A copolymer latex of a copolymer comprising 50 to 88 wt % of a conjugated diene monomer unit, 10 to 40 wt % of an ethylenically unsaturated nitrile monomer unit, and 2 to 10 wt % of an ethylenically unsaturated acid monomer unit, the copolymer latex having an insoluble content in methyl ethyl ketone of 70 wt % or less and a swelling degree in methyl ethyl ketone of 40 times or more when the copolymer is formed into a dry film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 2, 2021
    Assignee: ZEON CORPORATION
    Inventors: Naohiro Igari, Shinji Kato
  • Patent number: 10661536
    Abstract: A rubber formed article includes a laminate in which a rubber layer of nitrile rubber is laminated on a fiber base material. The nitrile rubber contains a copolymer having 52 to 78% by weight of conjugated diene monomer units, 20 to 40% by weight of ?,?-ethylenically unsaturated nitrile monomer units, and 2 to 10% by weight of ethylenically unsaturated monocarboxylic acid monomer units. Stress at 50% elongation of the laminate is 20 N or smaller. A ratio of an area where rubber is visible when the laminate is viewed from the back side to an area of the laminate is 15% or less. The thickness of the rubber layer is 0.30 mm or less.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: May 26, 2020
    Assignee: ZEON CORPORATION
    Inventors: Shinji Kato, Naohiro Igari, Tetsuya Akabane, Tomoya Taniyama
  • Publication number: 20190177517
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber and a metal compound including a trivalent or higher metal, wherein a content of the metal compound is 0.1 to 1.5 parts by weight, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 13, 2019
    Applicant: ZEON CORPORATION
    Inventors: Naohiro IGARI, Misa YAMAMOTO, Masaru KITAGAWA, Shinji KATO
  • Publication number: 20190071530
    Abstract: A copolymer latex of a copolymer comprising 50 to 88 wt % of a conjugated diene monomer unit, 10 to 40 wt % of an ethylenically unsaturated nitrile monomer unit, and 2 to 10 wt % of an ethylenically unsaturated acid monomer unit, the copolymer latex having an insoluble content in methyl ethyl ketone of 70 wt % or less and a swelling degree in methyl ethyl ketone of 40 times or more when the copolymer is formed into a dry film.
    Type: Application
    Filed: March 24, 2017
    Publication date: March 7, 2019
    Applicant: ZEON CORPORATION
    Inventors: Naohiro IGARI, Shinji KATO
  • Publication number: 20180303173
    Abstract: A dip-formed article includes a laminate in which a rubber layer is laminated on a fiber base material. The thickness of the rubber layer is 0.2 to 0.8 mm, the rubber constituting the rubber layer penetrates into the fiber base material, the maximum depth to which the rubber has penetrated into the fiber base material is 0.1 to 0.3 mm, and the maximum stress at 50% elongation of the laminate is 20 N or smaller.
    Type: Application
    Filed: June 30, 2016
    Publication date: October 25, 2018
    Applicant: ZEON CORPORATION
    Inventors: Naohiro IGARI, Shinji KATO, Tetsuya AKABANE, Tomoya TANIYAMA
  • Publication number: 20180186128
    Abstract: A rubber formed article includes a laminate in which a rubber layer of nitrile rubber is laminated on a fiber base material. The nitrile rubber contains a copolymer having 52 to 78% by weight of conjugated diene monomer units, 20 to 40% by weight of ?,?-ethylenically unsaturated nitrile monomer units, and 2 to 10% by weight of ethylenically unsaturated monocarboxylic acid monomer units. Stress at 50% elongation of the laminate is 20 N or smaller. A ratio of an area where rubber is visible when the laminate is viewed from the back side to an area of the laminate is 15% or less. The thickness of the rubber layer is 0.30 mm or less.
    Type: Application
    Filed: July 1, 2016
    Publication date: July 5, 2018
    Applicant: ZEON CORPORATION
    Inventors: Shinji KATO, Naohiro IGARI, Tetsuya AKABANE, Tomoya TANIYAMA