Patent ID: 8399551

Claim:
A curable elastomeric nanocomposite consisting of a swellable clay and a nonhalogenated elastomer having a viscosity average molecular weight in the range of 200,000 to 2,000,000, the nonhalogenated elastomer comprising C 2 to C 10 olefin derived units and styrenic derived units and/or substituted styrenic derived units, wherein all the styrenic derived units are present from 1 to 15 wt % of the elastomer; wherein the elastomer also comprises functionalized monomer units having functional groups pendant to the elastomer, E, selected from the following: wherein R 2 and R 2 ′ are the same or different and are selected from the group consisting of hydrogen, C 1 to C 20 alkyls, alkenyls or aryls, substituted C 1 to C 20 alkyls, alkenyls or aryls, hydroxyl and C 1 to C 20 alkoxys; and wherein R 3 and R 4 are the same or different and is —OR 5 or —NHR 5 , wherein R 5 is selected from the group consisting of hydrogen, C 1 to C 20 alkyls, alkenyls or aryls, and substituted C 1 to C 20 alkyls, alkenyls or aryls.