Patent ID: 7491764

Claim:
A nanocomposite comprising a nano-clay dispersed in an elastomeric matrix interpolymer, and one or more exfoliating additives; wherein the exfoliating additive is selected from the group consisting of (1) an amine having the structure R 2 R 3 R 4 N, wherein R 2 , R 3 , and R 4 are C 1 to C 20 alkyl or alkenyl which may be the same or different, (2) an ammonium corresponding thereto, and (3) a polyfunctional amine or ammonium, where in the elastomer matrix interpolymer is selected from the group consisting of a) interpolymers of C4 to C7 isomonoolefin, a para-methylstyrene and a para(halo-methylstyrene), and b) halogenated elastomers comprising C4 to C7 isomonoolefin units, multiolefin units and halogenated multiolefin units.