Patents by Inventor Hiroshi Takida

Hiroshi Takida 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: 4349644
    Abstract: A melt-blended composition containing at least two kinds of hydrolyzed ethylene-vinyl acetate copolymers having a different ethylene content from each other within the range of 20 to 55% by mole, a degree of hydrolysis in vinyl acetate component of at least 80% by mole and a specific melt tension as defined herein, the hydrolyzed copolymers included in the largest amount and the second largest amount among the hydrolyzed copolymers constituting the composition having a specific relationship with each other in weight ratio and ethylene content and the fusion curve of the composition indicating substantially single peak. The composition has an improved melt-moldability, and provides molded articles having remarkably reduced fish eyes and uniform thickness or excellent dimensional stability.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: September 14, 1982
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Teruo Iwanami, Hiroshi Takida, Yukio Fujita
  • Patent number: 4058904
    Abstract: Process for drying wet particles of hydrolyzed ethylene-vinyl acetate copolymer under the specific condition as follows:A. a pressure in a dryer of not more than 120 mmHg,B. a temperature of the heating surface of dryer of not more than 100.degree. C., andC. T .times. .theta..sup.0.6 .ltoreq. 320, wherein T is a temperature (.degree. C.) of the heating surface of dryer and .theta. is a residence time (hour) of the particles in the dryer. The thus obtained particles have excellent molding properties.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: November 22, 1977
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Takida, Akio Kido, Masazumi Takahashi
  • Patent number: 4041223
    Abstract: Process for preparing hydrolyzed ethylene-vinyl acetate copolymers, whose ethylene content is 20 to 50% by mole and degree of hydrolysis in vinyl acetate units is more than 90% by mole, having improved heat stability, which comprises, after hydrolyzing ethylene-vinyl acetate copolymer in an alcoholic or water medium in the presence of alkaline catalyst, contacting particles of the hydrolyzed copolymer with phosphoric acid such as orthophosphoric acid, phosphorous acid and pyrophosphoric acid to incorporate the phosphoric acid into the hydrolyzed copolymer in an amount of 0.001 to 0.5% by weight of phosphate radical calculated as --PO.sub.4 radical, to the dry weight of the hydrolyzed copolymer, and of not less than equal amount by weight to alkali metal ion remaining in the hydrolyzed copolymer.
    Type: Grant
    Filed: August 26, 1975
    Date of Patent: August 9, 1977
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kiyosi Amemiya, Hiroshi Takida
  • Patent number: 3976618
    Abstract: Molding, having an improved heat deflection property, comprising 95 to 50 % by weight of hydrolyzed ethylene-vinyl acetate copolymer and 5 to 50 % by weight of talc. Dispersion of larger amount of talc in molding composition is improved by incorporating 2 to 10 % by weight of elastomers per the copolymer.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: August 24, 1976
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Takida, Yoshimi Akamatu