Patents Examined by Aylward D.
  • Process for producing polyalkylene oxide derivatives
    Patent number: 5223583
    Abstract: A process for producing an unsaturated group-terminated polyalkylene oxide, which comprises subjecting a monoepoxide having at least 3 carbon atoms to ringopening addition polymerization to an initiator in the presence of a double metal cyanide complex catalyst, followed by converting terminal hydroxyl groups of the resulting hydroxyl group terminated polyalkylene oxide to unsaturated groups.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: June 29, 1993
    Assignee: Asahi Glass Company Ltd.
    Inventors: Toshihiko Higuchi, Shigeyuki Kozawa