Patents by Inventor Rüdiger Engehausen

Rüdiger Engehausen 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).

  • Method for the production of a copolymer based on vinyl aromatic compounds and conjugated dienes
    Patent number: 6417285
    Abstract: The present invention provides a method for the production of a copolymer based on vinyl aromatic compounds and conjugated dienes, in which after polymerization, the copolymers are treated with multi-functional sulfur halides in the presence of a catalyst at temperatures in the range from 20 to 130° C. The copolymers produced according to the present invention demonstrate clearly improved processing characteristics as a result of selective masticating effect and good mechanical properties.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: July 9, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ellen Giebeler, Heinz-Dieter Brandt, Rüdiger Engehausen, Günter Marwede
  • Catalyst system for olefin polymerization
    Patent number: 6414098
    Abstract: This invention relates to a catalyst system containing bisiminopyridyl complexes of cobalt and/or iron with bulky substituents on the bisiminopyridyl ligand, to a method for the polymerization of &agr;-olefins, particularly ethylene, and to the use of the polyolefins which can be produced by said method for the production of moldings of all types.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rüdiger Engehausen, Wolfgang Nentwig, Peter Schertl, Michael Arndt-Rosenau, Oliver Pyrlik, Maud Guillemot
  • Method for the copolymerization of conjugated diolefins (dienes) and vinyl-aromatic monomers with rare-earth catalysts and use of the copolymers in rubber mixtures for tire applications
    Patent number: 6399726
    Abstract: The present invention concerns a method for the copolymerization of conjugated diolefins and vinyl-aromatic monomers in the presence of rare-earth catalysts and the use of the copolymers in rubber mixtures for tire applications.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: June 4, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heike Windisch, Jürgen Trimbach, Peter Schertl, Ellen Giebeler, Rüdiger Engehausen
  • Catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapor phase and the use of diene rubbers produced therewith
    Patent number: 6291615
    Abstract: The present invention is directed to a catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapor phase, and the use of diene rubbers produced therewith, exhibiting a high cis content, an average vinyl content and a low gel content.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: September 18, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Dauben, Rüdiger Engehausen, Heinz Hermann Greve, Wolfgang Nentwig, Walter Kaminsky, Christian Strübel, Volker Scholz