Patents by Inventor Alexander Eckhardt

Alexander Eckhardt 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).

  • Polyurethane elastomers which exhibit improved stability to hydrolysis
    Patent number: 6737471
    Abstract: A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one esters of monobasic carboxylic acid or polybasic carboxylic acids, the (first) dissociation constant (pK) of which is 0.5 to 4.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: May 18, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Lorenz, Marc Schütze, Erhard Michels, Alexander Eckhardt
  • Phosphate-stabilized polyurethane materials, cross-linked by condensation, method for their production and use thereof
    Patent number: 6626988
    Abstract: The invention relates to polyurethane materials, cross-linked by silane polycondensation, containing alkoxylsilane functional polyurethanes, alkaline fillers, phosphorous compounds aminosilanes, organometallic compounds and optionally additional auxiliary agents, to a method for their production and to the use thereof.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: September 30, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Schmalstieg, Ralf Lemmerz, Ulrich Walter, Alexander Eckhardt
  • Polyurethane elastomers which exhibit improved stability to hydrolysis
    Publication number: 20020120027
    Abstract: A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one esters of monobasic carboxylic acid or polybasic carboxylic acids, the (first) dissociation constant (pK) of which is 0.5 to 4.
    Type: Application
    Filed: December 14, 2001
    Publication date: August 29, 2002
    Inventors: Klaus Lorenz, Marc Schutze, Erhard Michels, Alexander Eckhardt
  • Polyurethane elastomers which exhibit improved stability to hydrolysis
    Publication number: 20020120028
    Abstract: A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one disulphonates or polysulphonates.
    Type: Application
    Filed: December 14, 2001
    Publication date: August 29, 2002
    Inventors: Klaus Lorenz, Marc Schutze, Erhard Michels, Alexander Eckhardt