Patents Represented by Attorney D. E. Winters

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  • Microsuspension process for preparing solvent core sequential polymer dispersion
    Patent number: 4677003
    Abstract: The present invention relates to a sequential polymerization process for preparing a water-insoluble dispersion of core/shell particles. In one embodiment the process may be employed to produce a particulate dispersion useful in making water-based coating compositions wherein on drying the particulate dispersion serves as an opacifying agent. In another embodiment the process may be employed to microencapsulate a hydrophobic target material, such as a biocide or herbicide.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: June 30, 1987
    Assignee: Rohm and Haas Company
    Inventors: George H. Redlich, Ronald W. Novak