Patents by Inventor Keita TAKUNO

Keita TAKUNO 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).

  • Method for producing trans-bis(aminomethyl)cyclohexane, method for producing bis(isocyanatomethyl)cyclohexane, bis(isocyanatomethyl)cyclohexane, polyisocyanate composition, and polyurethane resin
    Patent number: 9969675
    Abstract: A method for producing trans-bis(aminomethyl)cyclohexane includes a trans-isomerization step in which cis-dicyanocyclohexane is isomerized into trans-dicyanocyclohexane by heating dicyanocyclohexane containing cis-dicyanocyclohexane in the presence of a tar component produced by distillation of dicyanocyclohexane; and an aminomethylation step in which trans-dicyanocyclohexane produced by the trans-isomerization step is allowed to contact with hydrogen to produce trans-bis(aminomethyl)cyclohexane.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: May 15, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Takeshi Fukuda, Kazuhiro Kosumi, Jun Takahashi, Keita Takuno, Ryo Shinagawa, Masashi Shimamoto, Gran Martinez Alejandro, Satoshi Yamasaki, Goro Kuwamura
  • METHOD FOR PRODUCING TRANS-BIS(AMINOMETHYL)CYCLOHEXANE, METHOD FOR PRODUCING BIS(ISOCYANATOMETHYL)CYCLOHEXANE, BIS(ISOCYANATOMETHYL)CYCLOHEXANE, POLYISOCYANATE COMPOSITION, AND POLYURETHANE RESIN
    Publication number: 20160207875
    Abstract: A method for producing trans-bis(aminomethyl)cyclohexane includes a trans-isomerization step in which cis-dicyanocyclohexane is isomerized into trans-dicyanocyclohexane by heating dicyanocyclohexane containing cis-dicyanocyclohexane in the presence of a tar component produced by distillation of dicyanocyclohexane; and an aminomethylation step in which trans-dicyanocyclohexane produced by the trans-isomerization step is allowed to contact with hydrogen to produce trans-bis(aminomethyl)cyclohexane.
    Type: Application
    Filed: July 25, 2014
    Publication date: July 21, 2016
    Inventors: Takeshi FUKUDA, Kazuhiro KOSUMI, Jun TAKAHASHI, Keita TAKUNO, Ryo SHINAGAWA, Masashi SHIMAMOTO, Gran Martinez Alejandro, Satoshi YAMASAKI, Goro KUWAMURA