Patents by Inventor Gabriele Lang

Gabriele Lang 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 isobutene polymers
    Publication number: 20050107551
    Abstract: The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof.
    Type: Application
    Filed: February 27, 2003
    Publication date: May 19, 2005
    Applicant: BASF Aktiengesellschaft
    Inventors: Gabriele Lang, Arno Lange, Hans Rath, Helmut Mach
  • Method for producing homopolymers and copolymers of isobutene
    Patent number: 6852808
    Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising: i) a Lewis acid selected from covalent metal-halogen compounds and covalent semimetal-halogen compounds and ii) at least one aprotic organic compound I having at least one functional group FG which forms a carbocation or a cationic complex with the Lewis acid under polymerization conditions in an organic solvent inert with respect to the Lewis acid, by a process in which the polymerization is carried out in a tubular flow-through reactor which has a plurality of curves having an alternating direction of curvature.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: February 8, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Hüffer, Hans Peter Rath, Gabriele Lang, Jens Kremeskötter, Elmar Stöckelmann
  • Polymer composition containing at least one middle molecular weight reactive polyisobutene
    Publication number: 20040171759
    Abstract: A polymer composition comprises at least one polyisobutene-containing component based on a medium molecular weight, reactive polyisobutene and at least one further polymer which is different therefrom.
    Type: Application
    Filed: February 6, 2004
    Publication date: September 2, 2004
    Inventors: Arno Lange, Stephan Huffer, Gabriele Lang, Helmut Mach, Hans Peter Rath, Eckhard Schauss
  • METHOD FOR PRODUCING HOMOPOLYMERS AND COPOLYMERS OF ISOBUTENE
    Publication number: 20040171772
    Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising:
    Type: Application
    Filed: November 5, 2003
    Publication date: September 2, 2004
    Inventors: Stephan Huffer, Hans Peter Rath, Gabriele Lang, Jens Kremeskotter, Elmar Stockelmann
  • Method for producing homopolymers and copolymers of isobutene
    Publication number: 20040014911
    Abstract: In a process for the polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers under the conditions of living cationic polymerization, the initiator system additionally comprises at least one nonpolymerizable, aprotic organosilicon compound having at least one Si—O bond.
    Type: Application
    Filed: June 4, 2003
    Publication date: January 22, 2004
    Inventors: Stephan Huffer, Hans Peter Rath, Gabriele Lang