Patents Assigned to Drew Chemical Corp.
  • Dispersions of water soluble polymers in oil
    Patent number: 4090992
    Abstract: Water soluble polymers dispersed in a water-in-oil emulsion are treated to reduce the water content thereof to provide a polymer dispersed in oil which is stable to coagulation or agglomeration during subsequent treatment. The composition can be chemically modified and/or made self dissolving in water by addition of surfactant without polymer agglomeration.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: May 23, 1978
    Assignee: Drew Chemical Corp.
    Inventor: Clyde S. Scanley