Patents Assigned to Asahi Kasei Cehmicals Corporation
  • Method for producing a polymer, polymer solution and polymer
    Patent number: 9862793
    Abstract: The present invention provides a method for producing a polymer by efficiently removing residue of metals such as titanium, aluminum and lithium from a polymer solution containing the residue of these metals to successfully obtain a purified polymer solution containing a smaller amount of the metal residue and having satisfactory color tone and transparency, a polymer solution and a polymer obtained by the production method.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: January 9, 2018
    Assignee: Asahi Kasei Cehmicals Corporation
    Inventors: Daisuke Shimizu, Kenta Shibuya, Takuya Suzuki