Patents by Inventor John C. H. Kerr

John C. H. Kerr 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).

  • High solids ethylene-vinyl acetate latex
    Patent number: 6716941
    Abstract: The present invention is directed to an ethylene-vinyl acetate dispersion and a process for making the dispersion by polymerizing a monomer mixture having vinyl acetate and ethylene in a batch process, in the presence of a stabilizing system of polyvinyl alcohol and without added surfactants, to form an ethylene-vinyl acetate polymer dispersion. The copolymer dispersion has a solids level of greater than 65 percent by weight, and a viscosity of less than 5000 mPa·s when measured at 65 percent solids at 25° C. The dispersion can be dried to form a redispersible powder. Both the dispersion and powder are useful in adhesive and coating formulations.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: April 6, 2004
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: John C. H. Kerr, Alistair J. McLennan, Robert N. Mitchell, Caroline S. Pattenden
  • High solids ethylene-vinyl acetate latex
    Publication number: 20030040558
    Abstract: The present invention is directed to an ethylene-vinyl acetate dispersion and a process for making the dispersion by polymerizing a monomer mixture having vinyl acetate and ethylene in a batch process, in the presence of a stabilizing system of polyvinyl alcohol and without added surfactants, to form an ethylene-vinyl acetate polymer dispersion. The copolymer dispersion has a solids level of greater than 65 percent by weight, and a viscosity of less than 5000 mPa.s when measured at 65 percent solids at 25° C. The dispersion can be dried to form a redispersible powder. Both the dispersion and powder are useful in adhesive and coating formulations.
    Type: Application
    Filed: July 27, 2001
    Publication date: February 27, 2003
    Inventors: John C.H. Kerr, Alistair J. McLennan, Robert N. Mitchell, Caroline S. Pattenden