Patents by Inventor Walter Prange

Walter Prange 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).

  • Paints and renders containing aqueous dispersions of vinylidene chloride/(meth)acrylate copolymers as binders
    Patent number: 4663384
    Abstract: Paints and renders contain, as binders, aqueous dispersions of copolymers which have a minimum film-forming temperature of from -15.degree. to 20.degree. C. and consist of(a) from 10 to 50% by weight of vinylidene chloride, up to half of which may be replaced with vinyl chloride,(b) from 44 to 88% by weight of esters of acrylic and/or methacrylic acid with alkanols of 1 to 18 carbon atoms and, if required, styrene, vinyl acetate, vinyl propionate or a mixture of these monomers and(c) from 2 to 6% by weight of .alpha.,.beta.-monoolefinically unsaturated mono- and/or dicarboxylic acids of 3 to 5 carbon atoms and/or their amides.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: May 5, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Erich Penzel, Walter Prange, Michael Melan, Eckehardt Wistuba, Alfred Mueller