Patents by Inventor Manfred Krell

Manfred Krell 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).

  • Aqueous contact adhesive dispersions, process for their preparation, and their use
    Patent number: 5300554
    Abstract: The invention relates to aqueous contact adhesive dispersions containing, based on the total weight of the dispersion, from 40 to 70% by weight of a copolymer prepared by emulsion polymerization, where the copolymer containsa) from 40 to 70% by weight of vinyl esters of aliphatic carboxylic acids having 2 to 12 carbon atoms,b) from 10 to 40% by weight of acrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms,c) from 8 to 15% by weight of methacrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms,d) from 0.1 to 3% by weight of ethylenically unsaturated compounds which cause cross-linking,e) from 0.1 to 5% by weight of ethylenically unsaturated carboxylic acids,f) from 0.1 to 2% by weight of substituted and unsubstituted (meth)acrylamides,g) from 0.5 to 3% by weight of ethylenically unsaturated hydroxyalkyl-functional compounds, andh) from 0.5 to 3% by weight of ethylenically unsaturated sulfates and/or sulfonates.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: April 5, 1994
    Assignee: Wacker Chemie GmbH
    Inventors: Manfred Krell, Wilfried Huster, Joachim Fischer