Patents by Inventor Atsushi Nanasawa

Atsushi Nanasawa 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).

  • Flame retardant composition
    Patent number: 7091266
    Abstract: A flame-retardant composition comprises a polyphenylene ether resin having a number average molecular weight in terms of polystyrene of 500 to 5,000 and a phosphazene compound, the content of the polyphenylene ether being 20 to 95% by weight and that of the phosphazene compound being 80 to 5% by weight. The flame-retardant composition is excellent in processability when added to resins, and can provide a resin composition that contains no halogens and has an excellent balance of processability, heat resistance and flame retardancy.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: August 15, 2006
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Fumiki Murakami, Junnichi Nakahashi, Atsushi Nanasawa
  • Phosphazene composition
    Patent number: 7060744
    Abstract: A phosphazene composition which has a content of volatile components of not less than 0.02% by weight and not more than 1.0% by weight when it is heated at 200° C. for 2 hours; is excellent in resistance to hydrolysis, and when the phosphazene composition is added to a resin, there is provided a resin composition which highly maintains the balance of resistance to hydrolysis, flame retardancy and stability of electric characteristics in a high-frequency field of not less than 1 GHz.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: June 13, 2006
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Fumiki Murakami, Jun-ichi Nakahashi, Atsushi Nanasawa, Tomoyuki Fujita
  • Flame retardant composition
    Publication number: 20050228087
    Abstract: A flame-retardant composition comprises a polyphenylene ether resin having a number average molecular weight in terms of polystyrene of 500 to 5,000 and a phosphazene compound, the content of the polyphenylene ether being 20 to 95% by weight and that of the phosphazene compound being 80 to 5% by weight. The flame-retardant composition is excellent in processability when added to resins, and can provide a resin composition that contains no halogens and has an excellent balance of processability, heat resistance and flame retardancy.
    Type: Application
    Filed: May 27, 2003
    Publication date: October 13, 2005
    Inventors: Fumiki Murakami, Junnichi Nakahashi, Atsushi Nanasawa
  • Phosphazene composition
    Publication number: 20040039134
    Abstract: A phosphazene composition which has a content of volatile components of not less than 0.02% by weight and not more than 1.0% by weight when it is heated at 200° C. for 2 hours; is excellent in resistance to hydrolysis, and when the phosphazene composition is added to a resin, there is provided a resin composition which highly maintains the balance of resistance to hydrolysis, flame retardancy and stability of electric characteristics in a high-frequency field of not less than 1 GHz.
    Type: Application
    Filed: August 27, 2003
    Publication date: February 26, 2004
    Inventors: Fumiki Murakami, Jun-Ichi Nakahashi, Atsushi Nanasawa, Tomoyuki Fujita
  • ABS resin compositions and molded articles thereof having improved coating performances
    Patent number: 5254622
    Abstract: A resin composition comprising a graft copolymer of a rubbery polymer having a vinyl cyanide compound and an aromatic vinyl compound grafted thereon, and a copolymer comprising a vinyl cyanide compound and an aromatic vinyl compound. A molded article of the resin composition is characterized with improved coating performances.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: October 19, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Atsushi Nanasawa, Noriaki Umeda