Specified Material Contains A Group Ia Atom In Elemental Form Or Bonded To Hydrogen Or Carbon Patents (Class 525/271)
Contains an atom other than group ia, c, or h (Class 525/272)
  • Preparation of block copolymers and products therefrom
    Patent number: 4169115
    Abstract: Block copolymers of AB or ABA configuration are prepared by anionically polymerizing one component, terminating the living polymer with sulfur or an episulfide and completing polymerization of the remaining block portion by free-radical polymerization.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: September 25, 1979
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Grace Y. Lo, Billy E. Burgert