Patents by Inventor William Aaron Koonce

William Aaron Koonce 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).

  • Reactive isocyanate-terminated prepolymers for binder applications
    Patent number: 8962771
    Abstract: Elastomer composites are prepared by wetting particles of a natural or synthetic rubber with a liquid one-component moisture-curable resin composition and then exposing the wetted particles to moisture to cure the resin composition. The moisture-curable resin composition comprises (a) an isocyanate-terminated polyurethane prepolymer having an isocyanate content of from 0.5 to 12% by weight and (b) from 1 to 30%, based on the combined weight of components (a) and (b), of an epoxide or lactone compound having a molecular weight of from about 70 to about 1000 and which is miscible in the prepolymer at the relative proportions thereof that are present. In addition, the composition contains no more than 0.1% by weight of compounds having a primary or secondary amino group.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: February 24, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Blndu Radhakrishnan, William Aaron Koonce
  • REACTIVE ISOCYANATE-TERMINATED PREPOLYMERS FOR BINDER APPLICATIONS
    Publication number: 20130066023
    Abstract: Elastomer composites are prepared by wetting particles of a natural or synthetic rubber with a liquid one-component moisture-curable resin composition and then exposing the wetted particles to moisture to cure the resin composition. The moisture-curable resin composition comprises (a) an isocyanate-terminated polyurethane prepolymer having an isocyanate content of from 0.5 to 12% by weight and (b) from 1 to 30%, based on the combined weight of components (a) and (b), of an epoxide or lactone compound having a molecular weight of from about 70 to about 1000 and which is miscible in the prepolymer at the relative proportions thereof that are present. In addition, the composition contains no more than 0.1% by weight of compounds having a primary or secondary amino group.
    Type: Application
    Filed: May 26, 2011
    Publication date: March 14, 2013
    Inventors: BIndu Radhakrishnan, William Aaron Koonce