Patents Examined by Fred Teskins
  • Polymerization of alpha-olefins with cationic metallocene catalysts based on organoaluminum anions
    Patent number: 5807939
    Abstract: Metallocene catalysts and their preparation and use in the polymerization of olefins. Specifically, the catalysts and processes relate to polymerization of olefins in which an aluminum ionizing agent containing a triphenylcarbenium ion is utilized in preparing the catalyst. The preparation of an olefin polymerization catalyst comprising a metallocene-type catalyst and triphenylcarbenium tetrakis(pentafluorophenyl)aluminate is disclosed.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 15, 1998
    Assignee: Fina Technology, Inc.
    Inventors: Michael J. Elder, John A. Ewen