Patents by Inventor Makoto Kokura

Makoto Kokura 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).

  • Urethane modified epoxy resin
    Patent number: 5880229
    Abstract: There is provided an urethane modified epoxy resin either obtained by reaction of 100 weight portions of a preliminary condensate ?A! produced by reaction of an epoxy resin and an acid of a phosphorus compound or its salt or ester and 5 to 60 weight portions of an isocyanate group-terminated urethane prepolymer ?B! produced by reaction of a hydroxy compound and an organic polyisocyanate compound, or obtained by preparing an urethane modified epoxy resin ?D! from 100 weight portions of an epoxy resin and 5 to 60 weight portions of the same isocyanate group-terminated urethane prepolymer ?B! as the above and causing the resin ?D! to react with an acid of the same phosphorus compound as the above or its salt or ester. Such an urethane modified epoxy resin can advantageously be used with an active organic hardening agent to produce an adhesive resin composition, which is highly effective for bonding iron and non-ferrous metals particularly in terms of shearing strength and peeling strength.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 9, 1999
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Makoto Kokura, Koji Akimoto, Kazuhiro Urihara
  • Urethane modified epoxy resin from epoxy phosphate and isocyanate prepolymer
    Patent number: 5700884
    Abstract: There is provided an urethane modified epoxy resin either obtained by reaction of 100 weight portions of a preliminary condensate ?A! produced by reaction of an epoxy resin and an acid of a phosphorus compound or its salt or ester and 5 to 60 weight portions of an isocyanate group-terminated urethane prepolymer ?B! produced by reaction of a hydroxy compound and an organic polyisocyanate compound, or obtained by preparing an urethane modified epoxy resin ?D! from 100 weight portions of an epoxy resin and 5 to 60 weight portions of the same isocyanate group-terminated urethane prepolymer ?B! as the above and causing the resin ?D! to react with an acid of the same phosphorus compound as the above or its salt or ester. Such an urethane modified epoxy resin can advantageously be used with an active organic hardening agent to produce an adhesive resin composition, which is highly effective for bonding iron and non-ferrous metals particularly in terms of shearing strength and peeling strength.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: December 23, 1997
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Makoto Kokura, Koji Akimoto, Kazuhiro Urihara
  • Preparation process of chlorinated rubber
    Patent number: 5350809
    Abstract: Disclosed herein is a process for the preparation of a chlorinated rubber, wherein chlorine gas is caused to act on a polyisoprene rubber to prepare the chlorinated rubber. Chlorine gas is blown into a high-acidity aqueous dispersion of the polyisoprene rubber to chlorinate the polyisoprene rubber, whereby a chlorinated isoprene rubber with high performance is prepared stably in an aqueous medium.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 27, 1994
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Hiroshi Tsuchiya, Makoto Kokura, Yutaka Ozawa, Takaaki Sugimura
  • Method of removing solvent from chlorinated resin
    Patent number: 4842743
    Abstract: A solvent remaining in a chlorinated resin can be removed away be bringing the solvent into contact with a fluid carbon dioxide being in a supercritical or liquid state.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: June 27, 1989
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Kageo Yoshida, Osamu Nittani, Toshinobu Ito, Makoto Kokura, Kouzi Hirano