Patents by Inventor Toshio Mizuta

Toshio Mizuta 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).

  • Thermoplastic resin composition having improved impact resistance
    Patent number: 7262249
    Abstract: A thermoplastic resin composition comprising: a graft copolymer obtained by polymerizing 10 to 70 parts by weight of a monomer containing 60 to 100% by weight of at least one vinyl monomer selected from the group consisting of a (meth)acrylate ester compound, an aromatic vinyl compound and a vinyl cyanide compound and 0 to 40% by weight of a monomer which is copolymerizable therewith, in the presence of 30 to 90 parts by weight of hollow rubber particles which are rubber obtained by polymerizing a polymerization component comprising a butadiene without using a crosslinking agent and have a porosity of 3 to 90% in the form of a latex, wherein the total amount of the monomer and the rubber particles is 100 parts by weight; and a thermoplastic resin.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: August 28, 2007
    Assignee: Kaneka Corporation
    Inventors: Akira Takaki, Toshio Mizuta, Akio Sato
  • Thermoplastic resin composition
    Publication number: 20040171749
    Abstract: A thermoplastic resin composition comprising: a graft copolymer obtained by polymerizing 10 to 70 parts by weight of a monomer containing 60 to 100% by weight of at least one vinyl monomer selected from the group consisting of a (meth)acrylate ester compound, an aromatic vinyl compound and a vinyl cyanide compound and 0 to 40% by weight of a monomer which is copolymerizable therewith, in the presence of 30 to 90 parts by weight of hollow rubber particles which are rubber obtained by polymerizing a polymerization component comprising a butadiene without using a crosslinking agent and have a porosity of 3 to 90% in the form of a latex, wherein the total amount of the monomer and the rubber particles is 100 parts by weight; and a thermoplastic resin.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 2, 2004
    Inventors: Akira Takaki, Toshio Mizuta, Akio Sato
  • Process for producing rubber latex containing water in particle
    Patent number: 6747083
    Abstract: There is provided a rubber latex for an excellent impact modifier used for a thermoplastic resin. A rubber latex containing water in particles obtained by seed polymerization with seed polymers which are highly hydrophilic and sufficiently swellable into a rubber monomer is used as an impact modifier for a thermoplastic resin.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: June 8, 2004
    Assignee: Kaneka Corporation
    Inventors: Akira Takaki, Toshio Mizuta, Tomomichi Hashimoto, Toshiyuki Mori, Mitsuo Kakutani
  • Impact modifiers for thermoplastic resins
    Patent number: 6605672
    Abstract: There is provided an excellent impact modifier for a vinyl chloride resin. There is used, as an excellent impact modifier, a copolymer which is prepared by polymerizing 10 to 70% by weight of a monomer or monomers containing 60 to 100% by weight of at least one vinyl monomer selected from the group consisting of a (meth)acrylate compound, an aromatic vinyl compound, a vinyl cyanide compound and vinyl chloride, and 0 to 40% by weight of the other monomer copolymerizable therewith, in the presence of 30 to 90% by weight of a hollow rubber particle of which glass transition temperature Tg is at most 0° C. and a void ratio is 3 to 90% by volume in a latex state, and which contains a cross linking agent in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total rubber component monomer.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: August 12, 2003
    Assignee: Kaneka Corporation
    Inventors: Akira Takaki, Toshio Mizuta, Tomomichi Hashimoto, Toshiyuki Mori
  • Process for producing rubber latex containing water in particle
    Publication number: 20020177634
    Abstract: There is provided a rubber latex for an excellent impact modifier used for a thermoplastic resin. A rubber latex containing water in particles obtained by seed polymerization with seed polymers which are highly hydrophilic and sufficiently swellable into a rubber monomer is used as an impact modifier for a thermoplastic resin.
    Type: Application
    Filed: December 27, 2001
    Publication date: November 28, 2002
    Inventors: Akira Takaki, Toshio Mizuta, Tomomichi Hashimoto, Toshiyuki Mori, Mitsuo Kakutani