Patents by Inventor Minoru Ushioda

Minoru Ushioda 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).

  • Porous particulate polyvinyl chloride impregnated with alkyl vinyl and alkyl methacrylate polymers
    Patent number: 4464503
    Abstract: A particulate vinyl chloride polymer having excellent processability and heat stability which comprises porous vinyl chloride polymer particles and alkyl vinyl polymers which are included in the porous particles. The particulate polymer is prepared by impregnating an alkyl vinyl compound in porous particles of a vinyl chloride polymer, polymerizing it, and in the course of the polymerization of the alkyl vinyl compound, adding an alkyl methacrylate to the polymerization system and continuing the polymerization. Since the thus obtained polymer has an improved melt-flowability and heat stability, it can be blended with a large quantity of an inorganic filler and can be molded with good processability.
    Type: Grant
    Filed: March 17, 1982
    Date of Patent: August 7, 1984
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Minoru Ushioda, Kenji Ueno, Masahiro Kobayashi
  • Polyvinyl chloride containing alkyl acrylate and alkyl methacrylate sequentially polymerized thereon
    Patent number: 4436861
    Abstract: A particulate vinyl chloride polymer having excellent processability and heat stability which comprises porous vinyl chloride polymer particles and acrylic polymers which are included in the above porous particles. The particulate polymer is prepared by impregnating an alkyl acrylate in porous particles of a vinyl chloride polymer, polymerizing it, and in the course of the polymerization of the alkyl acrylate, adding an alkyl methacrylate to the polymerization system and continuing the polymerization. Since the thus obtained polymer has an improved melt-flowability and heat stability, it can be blended with a large quantity of an inorganic filler and can be molded with good processability.
    Type: Grant
    Filed: March 17, 1982
    Date of Patent: March 13, 1984
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Minoru Ushioda, Kenji Ueno, Hiroyasu Furukawa, Masahiro Kobayashi
  • Vinyl chloride resin talc-embedded composition and method of manufacturing same
    Patent number: 4433097
    Abstract: Composition and method of manufacturing same, wherein a vinyl chloride resin has talc therein in direct contact with vinyl chloride based polymer particles without any intervening material therebetween.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: February 21, 1984
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tawada, Tetsuro Yamamoto, Minoru Ushioda, Kazuo Saito
  • Polyvinyl chloride composite material
    Patent number: 4368284
    Abstract: A composite material comprising polyvinyl chloride, talc and a polyamide and/or amide compound is disclosed. The talc used is comprised of 85% or more by weight of particles having a diameter of 10 microns or less. The polyamide used has a softening point of less than 200.degree. C. The amide compound used is in preference alkylene bis-amide or methylolated aliphatic amide. The composite material contains up to 30 parts by weight of the polyamide or the amide compound per 100 parts by weight of the talc used. The disclosed polyvinyl chloride composite material has an improved impact strength and improved thermal stability.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: January 11, 1983
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tawada, Minoru Ushioda, Tetsuro Yamamoto, Itaru Hatano