Patents by Inventor Guy Frijns

Guy Frijns 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 polyurea and polyurea/polyurethane polymers from polymeric polyamine
    Patent number: 4849460
    Abstract: The invention relates to a process for producing a polyurea or polyurea/polyurethane compound by reaction of an organic polyisocyanate with a diamine chain extender and an isocyanate-reactive polymer, the latter consisting at least in part, in a polymeric polyamine havng a molecular weight of from 1000 to 16000, containing from 2 to 4 primary amino groups per molecule, and being the condensation product of a polycarboxylic acid or ester with a stoichiometric excess of a polyamine having terminal propoxy groups and a molecular weight of from 500 to 5000.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: July 18, 1989
    Assignee: Imperial Chemical Industries PLC
    Inventors: James M. Bentley, James P. Brown, Guy Frijns, David J. Sparrow
  • Polymeric polyamines
    Patent number: 4751255
    Abstract: The invention relates to a polymeric polyamine having a molecular weight of from 1000 to 16000 and containing from 2 to 4 primary amino groups per molecule, the polymeric polyamine being the condensation product of a polycarboxylic acid or ester with a stoichiometric excess of a polyamine having terminal aminopropoxy groups and a molecular weight below 500.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: June 14, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: James M. Bentley, James P. Brown, Guy Frijns, David J. Sparrow