Patents by Inventor Hanns-Peter M{umlaut over (u)}ller

Hanns-Peter M{umlaut over (u)}ller 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).

  • Cosolvent-free, aqueous, anionic polyurethane dispersions and their use as peelable coatings
    Patent number: 6172126
    Abstract: The present invention relates to coating composition, which is suitable for preparing light fast coatings and contains a cosolvent-free, aqueous, anionic dispersion of polyurethane-ureas, the solids content of which contains the reaction product, present at least partially in salt form, of a) an NCO prepolymer prepared from i) an aliphatic and/or cycloaliphatic diisocyanate, ii) a macrodiol having a number average molecular weight of 500 to 10,000 iii) a 2,2-bis-(hydroxymethyl)alkane monocarboxylic acid and iv) a diol having a molecular weight of 62 to 400, with b) optionally a diamine, c) a monofunctional chain terminating agent, d) water and e) a neutralizing agent, provided that the NCO content of the prepolymer is up to 25% lower than the theoretical value, the entire polyurethane-urea synthesis reaction is performed in the homogeneous phase and no cosolvent having a boiling range of greater than 100° C. is used during the preparation of the dispersion of polyurethane-ureas.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: January 9, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hanns-Peter M{umlaut over (u)}ller, Horst Gruttmann, Holger Casselmann, Heino M{umlaut over (u)}ller, Joachim Petzoldt, Manfred Bock