Patents by Inventor Nobuki Toba

Nobuki Toba 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).

  • Polyvinyl chloride copolymer paste resin, composition thereof, and method for making the resin
    Patent number: 7354970
    Abstract: A novel polyvinyl chloride copolymer paste resin comprising a copolymer of a vinyl chloride monomer and a macromonomer of the present invention can be synthesized with high productivity, and can provides a plastisol having high gelation properties, storage stability, superior tensile properties in low-temperature working conditions and heat resistance.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: April 8, 2008
    Assignee: Kaneka Corporation
    Inventors: Mitsuyoshi Kuwahata, Shinbe Matsuzaki, Toshihito Kawauchi, Nobuki Toba
  • Vinyl chloride copolymer resin for paste, composition, and process for producing
    Publication number: 20050209424
    Abstract: A novel polyvinyl chloride copolymer paste resin comprising a copolymer of a vinyl chloride monomer and a macromonomer of the present invention can be synthesized with high productivity, and can provides a plastisol having high gelation properties, storage stability, superior tensile properties in low-temperature working conditions and heat resistance.
    Type: Application
    Filed: June 10, 2003
    Publication date: September 22, 2005
    Inventors: Mitsuyoshi Kuwahata, Shinbe Matsuzaki, Toshihito Kawauchi, Nobuki Toba
  • Polyvinyl chloride dispersion resin
    Publication number: 20030013828
    Abstract: There is provided a polyvinyl chloride dispersion resin from which a product having excellent clarity and heat resistance can be obtained, and which has improved pulverization efficiency and increased recovery percentage in the production process, a plastisol composition and a plastigel composition using the same. The polyvinyl chloride dispersion resin of the present invention is obtained by polymerization using 0.1 to 5.0 parts by weight of an ammonium salt emulsifier based on 100 parts by weight of a vinyl chloride monomer, wherein the polyvinyl chloride dispersion resin has a specific surface area of 5 to 10 m2/g and comprises (A) 10 to 60% by weight of a particle having a particle diameter distribution of less than 0.5 &mgr;m and having at least one peak diameter of the distribution in the range of at least 0.1 &mgr;m to less than 0.5 &mgr;m and (B) 40 to 90% by weight of a particle having a particle diameter distribution of at least 0.
    Type: Application
    Filed: March 15, 2002
    Publication date: January 16, 2003
    Inventors: Kazuko Shimada, Shinji Inoue, Yukio Higashiyama, Nobuki Toba
  • Polymerization apparatus and batch-wise process for producing vinyl chloride resin
    Patent number: 5278262
    Abstract: In a process for the microsuspension of emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: January 11, 1994
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka
  • Polymerization apparatus having an effective height/effective inner diameter ratio of at least 4 and a circumferential agitative diameter/effective inner ratio diameter of from 0.7 to 0.9
    Patent number: 5169918
    Abstract: In a process for the microsuspension or emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: December 8, 1992
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka