Patents by Inventor Hyang-Hoon CHAE

Hyang-Hoon CHAE 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 preparing polyacrylonitrile-based polymer for preparation of carbon fiber using microwave and method for preparing carbon fiber using the same
    Patent number: 8685361
    Abstract: Disclosed therein is a method for preparing a polyacrylonitrile-based polymer for preparation of carbon fiber having a melting point controlled by selecting an optimal energy of microwave, and a method for preparing a carbon fiber through melt spinning using the preparation method for polyacrylonitrile-based polymer. The present invention uses microwave to control the properties of the polyacrylonitrile-based polymer in a simplified way and prepare the polymer optimized for preparation of carbon fiber precursor through melt spinning for a short polymerization time, and provides a means for mass production of the polyacrylonitrile-based polymer being suitable for melt spinning at a temperature lower than the stabilization temperature and acquiring properties adequate to preparation of carbon fiber through stabilization. Hence, the present invention is expected to contribute to mass production of high-performance carbon fibers at reduced cost.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: April 1, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Kap-Seung Yang, Sung-Ho Lee, Hyang-Hoon Chae, Dong-Hun Lee
  • METHOD FOR PREPARING POLYACRYLONITRILE-BASED POLYMER FOR PREPARATION OF CARBON FIBER USING MICROWAVE AND METHOD FOR PREPARING CARBON FIBER USING THE SAME
    Publication number: 20120288434
    Abstract: Disclosed therein is a method for preparing a polyacrylonitrile-based polymer for preparation of carbon fiber having a melting point controlled by selecting an optimal energy of microwave, and a method for preparing a carbon fiber through melt spinning using the preparation method for polyacrylonitrile-based polymer. The present invention uses microwave to control the properties of the polyacrylonitrile-based polymer in a simplified way and prepare the polymer optimized for preparation of carbon fiber precursor through melt spinning for a short polymerization time, and provides a means for mass production of the polyacrylonitrile-based polymer being suitable for melt spinning at a temperature lower than the stabilization temperature and acquiring properties adequate to preparation of carbon fiber through stabilization. Hence, the present invention is expected to contribute to mass production of high-performance carbon fibers at reduced cost.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 15, 2012
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Kap-Seung YANG, Sung-Ho LEE, Hyang-Hoon CHAE, Dong-Hun LEE