Patents by Inventor G{umlaut over (u)}nter Renz

G{umlaut over (u)}nter Renz 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).

  • Process for preparing microemulsion polymer particles using high shear forces
    Patent number: 6177525
    Abstract: A particulate polymer P having an average particle diameter d50 of from 0.1 to 50 &mgr;m is prepared by a process in which an emulsion E is prepared from one or more monomers M, which are polymerizable by free radical polymerization to give the polymer P, water, and at least one protective colloid PC by the action of high shear forces, and the emulsion E is subjected to polymerization in a reactor with the use of a free radical polymerization initiator RI wherein, based on the emulsion E, not more than 75% by weight of the emulsion E (initially taken portion of E) are initially taken in the reactor at the beginning of the polymerization and at least 25% by weight of the emulsion E (feed portion of E) are not fed to the reactor until after the beginning of the polymerization.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: January 23, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Graham Edmund McKee, G{umlaut over (u)}nter Renz, Ekkehard Jahns, Walter Kastenhuber