Patents by Inventor Takahisa Iwahara

Takahisa Iwahara 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: 4788254
    Abstract: A moisture curable polymer composition comprising (A) an organic polymer having at least one reactive silicone group in a molecule and (B) a compound having one silanol group in a molecule and/or a compound which reacts with water or moisture to form a compound having one silanol group in a molecule, which is cured with moisture to give an elastomeric material with improved tensile properties and surface characteristics.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: November 29, 1988
    Assignee: Kanegafuchi Chemical Industry, Co., Ltd.
    Inventors: Fumio Kawakubo, Sadao Yukimoto, Miyako Takanoo, Katsuhiko Isayama, Takahisa Iwahara
  • Patent number: 4722807
    Abstract: A stabilizer useful for inhibiting polymerization of .gamma.-acryloyloxypropyltrimethoxysilane and .gamma.-methacryloyloxypropyltrimethoxysilane comprising 2,5-di-t-butylhydroquinone and an alcohol.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: February 2, 1988
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takahisa Iwahara, Tetsu Katsutani
  • Patent number: 4657986
    Abstract: A curable resinous composition comprising:(A) an organic elastomeric polymer having at least one silicon-containing reactive group in a molecule,(B) an epoxy resin,(C) a silicone compound having a silicon-containing group and a functional group reactive with an epoxy group, and(D) a curing agent for the epoxy resin, wherein said silicon-containing reactive group is a group of the formula: ##STR1## wherein X is a hydroxyl group or a hydrolyzable group, R.sup.1 is a monovalent hydrocarbon group having 1 to 20 carbon atoms or an organosiloxy group, "a" is 0, 1, 2, or 3, "b" is 0, 1 or 2 provided that the total of "a" and "b" is at least 1, and "m" is 0 or an integer of 1 to 18, a weight ratio of (A) to (B) being from 1:100 to 100:1 and a weight ratio of (A)+(B) to (C) being from 100:0.1 to 100:20.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: April 14, 1987
    Assignee: Kanegafuchi Chemical Industry Co., Ltd.
    Inventors: Katsuhiko Isayama, Toshifumi Hirose, Takahisa Iwahara, Fumio Kawakubo
  • Patent number: 4631322
    Abstract: A curable composition comprising (A) a phenol resin and (B) 1 to 200 parts by weight of, per 100 parts by weight of the phenol resin, a polyether having at least one silicon-containing reactive group, which provides a cured product having improved properties such as flexibility, impact resistance, toughness, peeling strength and tensile strength.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: December 23, 1986
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Katsuhiko Isayama, Toshifumi Hirose, Takahisa Iwahara, Fumio Kawakubo
  • Patent number: 4563538
    Abstract: A process for stabilizing a silicon-containing methacrylate having the formula (I): ##STR1## wherein X is Si(OCH.sub.3).sub.3, Si(OCH.sub.3).sub.2 CH.sub.3, Si(OCH.sub.3)(CH.sub.3).sub.2 or Si(CH.sub.3).sub.3 which comprises adding 2,5-di-t-butylbenzoquinone to the silicon-containing methacrylate, whereby polymerization of the silicon-containing methacrylate can be inhibited. As a result, the silicon-containing methacrylate can be stabilized without any trouble in distillation step.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: January 7, 1986
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Wakabayashi, Takahisa Iwahara