Patents by Inventor Bernd Stollfuss

Bernd Stollfuss 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 producing stable, colorless butadiene rubbers
    Publication number: 20040092649
    Abstract: Stable, colourless diene rubbers stabilised with phenolic compounds are produced by adding one or more phenolic compounds (stabilisers) to the polymer blend in a subsequent process step after polymerisation of the monomers used and adjusting the pH value and oxygen content such that the polymer blend displays a pH value in the range from 4 to 11 and the oxygen content is 0 to 0.3 ppm, relative to the water content of the polymer blend.
    Type: Application
    Filed: April 2, 2003
    Publication date: May 13, 2004
    Inventors: Heinz-Dieter Brandt, Martina Brandt, Franziska Hanne Brandt, Inken Margarethe Brandt, Rolf Peter, Bernd Stollfuss
  • Rubber mixtures containing sulfur-modified polychloroprene gel
    Patent number: 5124408
    Abstract: Rubber mixtures containing so-called "pre-crosslinked" polychloroprene give vulcanizates having an improved combination of low rolling resistance and low abrasion.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: June 23, 1992
    Assignee: Bayer AG
    Inventors: Hans-Wilhelm Engels, Ulrich Eisele, Werner Obrecht, Peter Wendling, Bernd Stollfuss
  • Process and catalyst for the preparation of syndiotactic 1,2,-polybutadiene
    Patent number: 4751275
    Abstract: Syndiotactic 1,2-polybutadiene of high quality may be obtained in excellent yield by solution polymerization of butadiene-(1,3) in hydrocarbons, using organometallic mixed catalysts composed of trialkylaluminium, hydrocarbon-soluble chromium-III compounds and a dialkylphosphite corresponding to the formula ##STR1## wherein R denotes straight chained or branched C.sub.1 -C.sub.8 -alkyl andR.sub.1, R.sub.2 and R.sub.3 denote methyl or ethyl orR and R.sub.1 together form a methylene group.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: June 14, 1988
    Assignee: Bayer Akteingesellschaft
    Inventors: Josef Witte, Gerd Sylvester, Bernd Stollfuss