Patents Assigned to Korea Reasearch Institute of Chemical Technology
  • Method for preparing a poly(ether sulfonimide or -amide) copolymer using cyclic oligomers
    Patent number: 8586700
    Abstract: Disclosed is a method for preparing a poly(ethersulfonimide or ethersulfonamide) copolymer using cyclic oligomers, and more particularly, to a method for preparing a poly(ethersulfonimide or ethersulfonamide) copolymer by preparing a cyclic ether sulfone oligomer and a cyclic imide or amide oligomer and subjecting the cyclic ether sulfone oligomer and the cyclic imide or amide oligomer to ring-opening copolymerization in the presence of an alkali metal fluoride catalyst.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: November 19, 2013
    Assignee: Korea Reasearch Institute of Chemical Technology
    Inventors: Yong Seok Kim, Hyun Min Jung, Jong Chan Won, Jae Heung Lee