Patents by Inventor Junji Ayukawa

Junji Ayukawa 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 rubber composition and flame-retardant elastomer
    Patent number: 6534586
    Abstract: The invention provides a flame-retardant rubber composition which may form a vulcanizate of an elastomer whose deterioration of mechanical strength is little to enjoy excellent mechanical properties, even when a nonhalogenated flame retardant is contained in a high proportion in the composition, and a flame-retardant elastomer obtained therefrom. The flame-retardant rubber composition contains (A) an olefin copolymer having a functional group, which comprises (a-1) a structural unit derived from ethylene, (a-2) a structural unit derived from an &agr;-olefin compound having 3 to 10 carbon atoms, (a-3) a structural unit derived from a functional group-containing unsaturated compound, and optionally (a-4) a structural unit derived from a nonconjugated diene compound, and has an intrinsic viscosity [&eegr;] of 0.1 to 10 dL/g as measured in decalin at 135° C., (B) a vulcanizing agent and/or a crosslinking agent and (C) a nonhalogenated flame retardant.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: March 18, 2003
    Assignee: JSR Corporation
    Inventors: Shoei Tsuji, Junji Ayukawa, Toshiyuki Hayakawa, Minoru Tanaka, Fumio Tsutsumi
  • Flame-retardant rubber composition and flame-retardant elastomer
    Publication number: 20020058746
    Abstract: The invention provides a flame-retardant rubber composition which may form a vulcanizate of an elastomer whose deterioration of mechanical strength is little to enjoy excellent mechanical properties, even when a nonhalogenated flame retardant is contained in a high proportion in the composition, and a flame-retardant elastomer obtained therefrom.
    Type: Application
    Filed: September 10, 2001
    Publication date: May 16, 2002
    Applicant: JSR Corporation
    Inventors: Shoei Tsuji, Junji Ayukawa, Toshiyuki Hayakawa, Minoru Tanaka, Fumio Tsutsumi