Patents by Inventor Kohei Hosomi

Kohei Hosomi 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: 11685827
    Abstract: A polyvinyl chloride composition for powder molding includes a polyvinyl chloride (A) an amount of 100 parts by mass, a plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less, and an acrylic polymer in an amount of 4 parts by mass or more and 23 parts by mass or less. The polyvinyl chloride (A) has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,350 or more. The acrylic polymer has an average particle diameter of 0.01 ?m or more and 10 ?m or less and contains a constitutional unit derived from a (meth) acrylic ester in an amount of 50 mass % or more.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: June 27, 2023
    Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.
    Inventors: Kentaro Takesada, Kohei Hosomi
  • Patent number: 11312848
    Abstract: The present invention relates to a powder slush molded body of a polyvinyl chloride composition, the polyvinyl chloride composition containing a polyvinyl chloride, a plasticizer, and an acrylic polymer. The polyvinyl chloride composition contains the plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the polyvinyl chloride. When a cross section of the powder slush molded body extending in parallel with a thickness direction is observed under an optical microscope using reflected light, irregular scale-like polyvinyl chloride particles having a long diameter of 30 ?m or more and 500 ?m or less are continuous with one another via interfacial portions, and the number of aggregated particles of the acrylic polymer having a long diameter of 30 ?m or more and 100 ?m or less is 10 particles/mm2 or less.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: April 26, 2022
    Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.
    Inventors: Kentaro Takesada, Kohei Hosomi
  • Publication number: 20210363343
    Abstract: A polyvinyl chloride composition for powder molding includes 100 parts by mass of a polyvinyl chloride, 120 parts by mass or more and 200 parts by mass or less of a polyester-based plasticizer, and 4 parts by mass or more and 23 parts by mass or less of an acrylic polymer. The polyvinyl chloride has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,700 or more. The acrylic polymer contains 40 mass % or more and 95 mass % or less of a constitutional unit derived from methyl (meth)acrylate, and 5 mass % or more and 60 mass % or less of a constitutional unit derived from at least one (meth)acrylic ester selected from the group consisting of a (meth)acrylic ester of an aliphatic alcohol having two or more carbon atoms and a (meth)acrylic ester of an aromatic alcohol.
    Type: Application
    Filed: August 6, 2021
    Publication date: November 25, 2021
    Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL., lTD.
    Inventors: Kentaro Takesada, Junpei Wakamatsu, Kohei Hosomi
  • Publication number: 20200332106
    Abstract: The present invention relates to a powder slush molded body of a polyvinyl chloride composition, the polyvinyl chloride composition containing a polyvinyl chloride, a plasticizer, and an acrylic polymer. The polyvinyl chloride composition contains the plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the polyvinyl chloride. When a cross section of the powder slush molded body extending in parallel with a thickness direction is observed under an optical microscope using reflected light, irregular scale-like polyvinyl chloride particles having a long diameter of 30 ?m or more and 500 ?m or less are continuous with one another via interfacial portions, and the number of aggregated particles of the acrylic polymer having a long diameter of 30 ?m or more and 100 ?m or less is 10 particles/mm2 or less.
    Type: Application
    Filed: October 12, 2018
    Publication date: October 22, 2020
    Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.
    Inventors: Kentaro Takesada, Kohei Hosomi
  • Publication number: 20200255644
    Abstract: The present invention relates to a polyvinyl chloride composition for powder molding including a polyvinyl chloride (A) in an amount of 100 parts by mass, a plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less, and an acrylic polymer in an amount of 4 parts by mass or more and 23 parts by mass or less. The polyvinyl chloride (A) has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,350 or more. The acrylic polymer has an average particle diameter of 0.01 ?m or more and 10 ?m or less and contains a constitutional unit derived from a (meth)acrylic ester in an amount of 50 mass % or more. The (meth)acrylic ester includes at least one selected from the group consisting of (meth)acrylic ester of an aliphatic alcohol having two or more carbon atoms and a (meth)acrylic ester of an aromatic alcohol.
    Type: Application
    Filed: October 12, 2018
    Publication date: August 13, 2020
    Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.
    Inventors: Kentaro Takesada, Kohei Hosomi