Patents by Inventor Matsuyoshi Nakagawa

Matsuyoshi Nakagawa 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: 7501474
    Abstract: A resin composition comprising (A) 70 to 98% by weight of a polyphenylene ether resin or a mixture of a polyphenylene ether resin and a polystyrene-based resin, (B) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-conjugate diene block copolymer having an aromatic vinyl content of 50 to 80% by weight, and (C) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-isoprene block copolymer having an aromatic vinyl content of 15 to 45% by weight is excellent in injection moldability (fluidability and productivity), heat resistance, impact resistance and chemical resistance, can provide a molded article excellent in appearance and rigidity even in a thin-walled portion, and can be suitably used for applications in which the molded article is used in contact with water or under conditions of high temperature and high humidity, particularly in a portion which comes into contact with an organic solvent contained in skin lotion or the like.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: March 10, 2009
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Takeshi Fujisawa, Matsuyoshi Nakagawa
  • Publication number: 20060106165
    Abstract: A resin composition comprising (A) 70 to 98% by weight of a polyphenylene ether resin or a mixture of a polyphenylene ether resin and a polystyrene-based resin, (B) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-conjugate diene block copolymer having an aromatic vinyl content of 50 to 80% by weight, and (C) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-isoprene block copolymer having an aromatic vinyl content of 15 to 45% by weight is excellent in injection moldability (fluidability and productivity), heat resistance, impact resistance and chemical resistance, can provide a molded article excellent in appearance and rigidity even in a thin-walled portion, and can be suitably used for applications in which the molded article: is used in contact with water or under conditions of high temperature and high humidity, particularly in a portion which comes into contact with an organic solvent contained in skin lotion or the like.
    Type: Application
    Filed: July 18, 2003
    Publication date: May 18, 2006
    Applicant: ASAHI CORPORATION
    Inventors: Takeshi Fujisawa, Matsuyoshi Nakagawa
  • Patent number: 6984678
    Abstract: The present invention provides a thermoplastic resin composition characterized by (1) having an excellent appearance even when it is extruded into a molded piece at a high output, (2) retaining its impact strength even after heat exposure, and (3) having less foreign matter generation at the time of production. According to the present invention, in a composition comprising a polyamide, a polyphenylene ether and a block copolymer, a mixture of a block copolymer having a number average molecular weight of less than 120,000 and a block copolymer having a number average molecular weight of 120,000 or more is used as the block copolymer.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: January 10, 2006
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Matsuyoshi Nakagawa, Takaaki Miyoshi, Kazuya Noda
  • Patent number: 6946084
    Abstract: The present invention provides a thermoplastic resin composition remarkably improved in toughness, particularly, tensile elongation and multiaxial impact strength, while maintaining the flowability and heat resistance of polyamide/polyphenylene ether alloys.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: September 20, 2005
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Matsuyoshi Nakagawa, Takaaki Miyoshi, Kazuya Noda
  • Publication number: 20040157978
    Abstract: The present invention provides a thermoplastic resin composition remarkably improved in toughness, particularly, tensile elongation and multiaxial impact strength, while maintaining the flowability and heat resistance of polyamide/polyphenylene ether alloys.
    Type: Application
    Filed: November 28, 2003
    Publication date: August 12, 2004
    Inventors: Matsuyoshi Nakagawa, Takaaki Miyoshi, Kazuya Noda
  • Publication number: 20040143061
    Abstract: The present invention provides a thermoplastic resin composition characterized by (1) having an excellent appearance even when it is extruded into a molded piece at a high output, (2) retaining its impact strength even after heat exposure, and (3) having less foreign matter generation at the time of production.
    Type: Application
    Filed: November 21, 2003
    Publication date: July 22, 2004
    Inventors: Matsuyoshi Nakagawa, Takaaki Miyoshi, Kazuya Noda