Patents by Inventor Albrecht Kerckow

Albrecht Kerckow 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).

  • Preparation of aqueous polymer dispersions having a polymer content of up to 75% by weight
    Patent number: 4371659
    Abstract: Aqueous polymer dispersions containing up to 75% by weight of polymer are prepared advantageously by emulsion copolymerization in the presence of conventional anionic emulsifiers, polymerization initiators and small amounts of polymerization inhibitors, at conventional polymerization temperatures, by copolymerizing at least two monomers A, which per se are not copolymerizable with one another, mixed with from 60 to 95% by weight of at least one monomer B, which is copolymerizable with both monomers A, in the presence of a polymerization inhibitor, by the emulsion feed process, wherein (a) the initial aqueous phase at the start of the monomer emulsion feed contains from 0.01 to 0.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: February 1, 1983
    Assignee: Basf Aktiengesellschaft
    Inventors: Wolfgang Druschke, Albrecht Kerckow, Bernd Stanger