Patent ID: 7473715
Filing Date: 2009-01-06
Classification: C08J

Abstract:
1. A method for producing a foamed article, comprising the steps of: providing an epoxy component, said epoxy component including an epoxy resin, a blowing agent having a thermoplastic shell filled with a solvent core; providing an amine component, said amine component including at least one amine; and combining said epoxy component and said amine component to form a reactive mixture and allowing said thermoplastic shell filled with a solvent core to soften from amine-epoxy exotherm and then expand due to gas pressure from said solvent core, wherein said reactive mixture cures upon combining said epoxy component with said amine component through a cross-linking of said epoxy resin; wherein one or both of the epoxy component and the amine component include an ammonium clay; and wherein the ammonium clay is between about 2% and about 14% by weight of the epoxy component, between 5% and about 25% by weight of the amine component or both.