Patents by Inventor Charles Howard Foster

Charles Howard Foster 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).

  • Protonated amines for controlled crosslinking of latex polymers
    Patent number: 6262169
    Abstract: The latex polymer compositions of the present invention exhibit latent crosslinking properties. Latent crosslinking in the polymers takes advantage of the fast reaction that occurs between amine-reactive carbonyl groups in the polymer component and carbonyl-reactive amine nitrogens in the crosslinking component, but controls the rate of crosslinking by protonating the amines with a volatile acid. Once the latex is coated onto a substrate, the volatile acid evaporates and the carbonyl reactive amine nitrogens react with the amine reactive carbonyl groups to form a crosslinked coating.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: July 17, 2001
    Assignee: Eastman Chemical Company
    Inventors: Bradley James Helmer, David Logan Murray, Charles Howard Foster