Patents by Inventor Wilhelm-Franz Biener

Wilhelm-Franz Biener 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).

  • Patent number: 6743874
    Abstract: The invention relates to a rapidly cross-linking liquid fluoropolymer that contains as the essential components tetrafluoroethylene and at least one compound from the group consisting of diiodomethane, 1,2-diiodo-1,1-difluoroethane, 1-iodo-2-bromo-1,1-difluoroethane, 1-bromo-2-iodo-1,1-difluoroethane and/or 1,2-dibromo-1,1-difluoroethane that has certain fractions of the final group of the formula —CH2—X with X=Br and/or iodine, and iodine/bromine contents in the range of from 0.05 to 1 wt.-%. and that has a defined molecular weight and viscosity. The invention further relates to a method for producing said fluoropolymer and to its use.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: June 1, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: David B. Harrison, Wilhelm-Franz Biener
  • Publication number: 20030166807
    Abstract: The invention relates to a rapidly cross-linking liquid fluoropolymer that contains as the essential components tetrafluoroethylene and at least one compound from the group consisting of diiodomethane, 1,2-diiodo- 1,1 -difluoroethane, 1-iodo-2-bromo-1,1-difluoroethane, 1-bromo-2-iodo- 1,1-difluoroethane and/or 1,2-dibromo-1,1difluoroethane that has certain fractions of the final group of the formula —CH2—X with X=Br and/or iodine, and iodine/bromine contents in the range of from 0.05 to 1 wt.-%. and that has a defined molecular weight and viscosity. The invention further relates to a method for producing said fluoropolymer and to its use.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 4, 2003
    Inventors: David B. Harrison, Wilhelm-Franz Biener
  • Patent number: 6211314
    Abstract: The present invention therefore provides a vulcanizable mixture comprising a low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) wherein R1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: April 3, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Krüger, Wilhelm-Franz Biener
  • Patent number: 5969064
    Abstract: The present invention therefore provides a new process for the preparation of low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) ##STR1## wherein R.sup.1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R.sup.2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: October 19, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Wilhelm-Franz Biener