Patents by Inventor Max Van De Pas

Max Van De Pas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Catalyst system and process for the polymerization of olefins
    Patent number: 7141527
    Abstract: A catalyst system for the polymerization of olefins comprising the product obtained by contacting: (A) a metallocene complex; (B) an organometallic aluminium compound of formula (II): Al[CH2—C(Ar)R4R5]xHy??(II) wherein Ar is a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms; R4 is a linear or branched, saturated or unsaturated, C1–C10 alkyl, C6–C20 aryl, C7–C20 arylalkyl or C7–C20 alkylaryl; R5 is hydrogen or a linear or branched, saturated or unsaturated, C1–C10 alkyl, C6–C20 aryl, C7–C20 arylalkyl or C7–C13 alkylaryl group; x=2 or 3; y=3-x; and water; the molar ratio (B)/(C) being between 1:1 and 100:1. These catalysts show an improved activity with respect to known catalysts, wherein different aluminium compounds are used.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: November 28, 2006
    Assignee: Basell Polyolefine GmbH
    Inventors: Jan F. Van Baar, Andrew D. Horton, Gerard M. M. Van Kessel, Eric Kragtwijk, Max Van De Pas, Peter A. Schut, Johan Stapersma