Patents by Inventor Michael Baumgartel

Michael Baumgartel 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).

  • Continuous production process of expandable styrene polymer beads
    Patent number: 5905096
    Abstract: A continuous process for preparing bead-form expandable styrene polymers in which the styrene is prepolymerized in bulk to a conversion of 10 to 80%, the prepolymer is dispersed in liquid form in an aqueous phase in the presence of suspension stabilizers, and the polymerization of the prepolymer is completed in an aqueous suspension to a residual styrene content of less than 2000 ppm.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: May 18, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Nikolaus Lay, Swen Ruck, Michael Schiessl, Michael Witt, Hans Dieter Zettler, Michael Baumgartel, Gerhard Dembek, Klaus Hahn, Jan Holoch, Wolfram Husemann, Knut Kaempfer
  • Continuous preparation of polymers and apparatus for this purpose
    Patent number: 5753784
    Abstract: In a process for the continuous preparation of polymers from reaction components, in particular of copolymers of styrene and acrylonitrile, by mass or solution polymerization, the reaction components are passed through a circulation reactor which has at least one tube reactor in which is arranged at least one static mixing element through which a liquid heat-transfer medium flows. The static mixing element has multiply curved pipelines.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: May 19, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Fischer, Michael Baumgartel
  • Continuous preparation of polymers
    Patent number: 5739219
    Abstract: In a process and an apparatus for the continuous preparation of polymers from reaction components, in particular of copolymers of styrene and acrylonitrile, by bulk or solution polymerization, the reaction components are passed through a recycle reactor which has at least one tube bundle reactor whose tubes are in thermal contact with a liquid heat-transfer medium and which is connected to at least one static mixing element.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: April 14, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Fischer, Michael Baumgartel
  • Continuous preparation of polymers
    Patent number: 5726258
    Abstract: A process for the continuous preparation of polymers from reaction components, in particular of copolymers of styrene and acrylonitrile, by bulk or solution polymerization, where the reaction components are passed through the tubes of a recycle reactor, the recycle reactor has at least one tube bundle reactor with straight tubes around which a liquid heat-transfer medium flows, and each tube bundle reactor consists of at least two shell and tube heat exchangers which are connected together by at least one intermediate mixing section. Moreover the volume of the shell and tube heat exchangers is at least 50% of the total volume of the arrangement. The intermediate mixing sections consist of tubes with static mixing elements, around which tubes a heat-transfer medium flows.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: March 10, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Fischer, Michael Baumgartel