Patents Represented by Attorney H. L. Deming

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  • Chemically-initiated inverse emulsion polymerization with Na, Li/Cl, Br salt
    Patent number: 4379883
    Abstract: A chemically initiated water-in-oil emulsion polymerization process is disclosed for making water-soluble anionic copolymers from water-soluble, ethylenically unsaturated, addition polymerizable monomers. Improved products are obtained by adding a water-soluble salt to the aqueous phase of the water-in-oil emulsion prior to polymerization.
    Type: Grant
    Filed: August 4, 1981
    Date of Patent: April 12, 1983
    Assignee: Hercules Incorporated
    Inventor: David C. Zecher
  • Foam compositions for surface application to fibrous substrates
    Patent number: 4353993
    Abstract: Improved rosin-based foams suitable for surface application to fibrous substrates such as paper and paperboard are described. The foams are obtained by aerating an aqueous solution having a pH of at least 8 and containing 0.1 to 5% of a water-soluble salt of rosin or fortified rosin and 0.02 to 5% of a water-soluble, amine-containing polymer compatible with the salt, the weight ratio of the salt to the polymer being within the range of 1:1 to 25:1.
    Type: Grant
    Filed: May 12, 1981
    Date of Patent: October 12, 1982
    Assignee: Hercules Incorporated
    Inventor: Edward G. McCrossin