Patents by Inventor Waltherus J. Sep

Waltherus J. Sep 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).

  • Composition based on an aqueous dispersion of an addition polymer
    Patent number: 5100955
    Abstract: The invention relates to a composition based on an aqueous dispersion of an addition polymer of one or more olefinically unsaturated monomers, emulsion stabilizers and/or emulsifiers and a silicon compound.The addition polymer comprises monomer units containing acid groups and the silicon compound used is an epoxysilane with the formula ##STR1## where R=epoxyalkyl (C.sub.1 -C.sub.4),R.sup.1 =alkyl (C.sub.1 -C.sub.4) or phenyl,R.sup.2 =alkoxy (C.sub.1 -C.sub.4), alkyl (C.sub.1 -C.sub.4) or phenyl,R.sup.3 and R.sup.4 =alkoxy (C.sub.1 -C.sub.4) or OHThe compositon can be applied in adhesives and coatings.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: March 31, 1992
    Assignee: DSM Resins B.V.
    Inventors: Dick A. Pons, Johannes B. Van Hout, Waltherus J. Sep
  • Unsaturated polyester compositions and their use
    Patent number: 4347170
    Abstract: The invention provides novel curable unsaturated polyester compositions comprising an unsaturated polyester, a reactive copolymerizable monomer, a paraffin wax as an evaporation-reducing agent and as an adhesion promotor a compound, containing 10-30 carbon atoms, of the class consisting of alkylaromatic, alkenylaromatic, alkylolaromatic compounds or an alcohol.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: August 31, 1982
    Assignee: Internationale Octrooi Maatschappij "Octropa" B.V.
    Inventors: Waltherus J. Sep, Adam Huijsman
  • Unsaturated polyester composition
    Patent number: 4343932
    Abstract: The invention provides unsaturated polyester compositions which can be cured to form flexible objects, which compositions comprise terminal 1,2-alkene dicarboxylic acid in an amount of 1-25, preferably 3-15 mol-percent, calculated on the total amount of dicarboxylic acid, and 1-8, preferably 2.5-6 mol-percent of the dicarboxylic acids in the chain of the polyester consists of trans-1,2-alkene dicarboxylic acid.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: August 10, 1982
    Assignee: Internationale Octrooi Maatschappij "Octropa" BV
    Inventors: Jacob J. Prooi, Waltherus J. Sep, Wilhelmina Westerhof