Patents by Inventor Elke Barsties

Elke Barsties 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).

  • Polymerization process using metallocene complexes in the catalyst system
    Patent number: 5756608
    Abstract: A process for polymerizing C.sub.2 -C.sub.10 -alk-1-enes in the presence of a metallocene complex of the formula I ##STR1## where the substituent groups have the meanings described in the specification.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: May 26, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Langhauser, David Fischer, Jurgen Kerth, Gunther Schweier, Hans-Herbert Brintzinger, Elke Barsties, Werner Roell
  • Supported metallocene complexes having heterofunctional groups in the cyclopentadienyl system as catalyst systems
    Patent number: 5627246
    Abstract: A supported catalyst system that is obtained bya) reacting a finely divided carrier with an a-trisalkoxy-silyl-.omega.-haloalkyl compound,b) adding a metallocene complex of the indicated formula I to the reaction product of a);c) reacting the product of b) with a quaternizing agent; andd) optionally adding an open-chain or cyclic alumoxane compound.The catalyst system can be used to prepare polymers of C.sub.2 -C.sub.10 -alk-1-enes.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: May 6, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Langhauser, David Fischer, J urgen Kerth, G unther Schweier, Elke Barsties, Hans-Herbert Brintzinger, Stefan Schaible, Werner Roell
  • Metallocene complexes having heterofunctional groups in the cyclopentadienyl system
    Patent number: 5585509
    Abstract: Metallocene complexes of the general formula I ##STR1## where the substituents Y, M, x, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.6, R.sup.7, R.sup.8, and R.sup.9 are as described in the disclosure, and ligand systems of the general formula II ##STR2## as intermediates.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: December 17, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Langhauser, David Fischer, J urgen Kerth, G unther Schweier, Hans-Herbert Brintzinger, Elke Barsties, Werner Roell
  • Soluble catalyst systems for the polymerization of C.sub.2 - to C.sub.10 -alk-l-enes
    Patent number: 5132262
    Abstract: The present invention relates to soluble catalyst systems for the polymerization of C.sub.2 - to C.sub.10 -alk-l-enes, containing, as active constituents,a) a metallocene complex of the general formula I ##STR1## where R.sup.1 and R.sup.2 are branched C.sub.4 - to C.sub.10 -alkyl, 5- to 7-membered cycloalkyl, which may itself be substituted by C.sub.1 - to C.sub.6 -alkyl, or are C.sub.6 - to C.sub.15 -aryl or aralkyl;R.sup.3 to R.sup.6 are C.sub.1 - to C.sub.8 -alkyl,M is titanium, zirconium, hafnium or vanadium,Y is silicon or germanium, andX is halogen or C.sub.1 - to C.sub.8 -alkyl,b) and an open-chain or cyclic aluminoxane compound of the general formula II or III ##STR2## where R.sup.7 is C.sub.1 -C.sub.4 -alkyl, and m is from 5 to 30. These catalyst systems are particularly suitable for the preparation of polypropylene and copolymers of propylene with lesser amounts of other C.sub.2 - to C.sub.10 -alky-l-enes.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: July 21, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Rieger, Hans Brintzinger, Werner Roell, Annette Reinmuth, Elke Barsties