Patents Assigned to Polyfil Corporation
  • Blowing agents formed from nanoparticles of carbonates
    Patent number: 8563621
    Abstract: The present invention relates to the preparation and use of a blowing agent in the form of of nanoparticles of an inorganic carbonate, and an acid. The acid is capable of being liquefied by heating to be reactive with the carbonate to release carbon dioxide that is useful as a blowing agent in all types of organic foams. The blowing agent, optionally pelletized in a suitable polymer carrier, is useful as a heat-activated blowing agent additive in polymer compositions.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: October 22, 2013
    Assignee: Polyfil Corporation
    Inventor: Renee M. Lapierre