Patent ID: 7173092

Claim:
A method for preparing an elastomeric base composition having a fluorocarbon continuous phase comprising: (I) mixing (A) a fluorocarbon elastomer with (B) a compatibilizer, (C) an optional catalyst, (II) mixing the product of step (I) with (D) a silicone base comprising (Dâ€²) a curable organopolysiloxane, and (Dâ€³) a filler, (E) an optional crosslinking agent, (F) a cure agent in an amount sufficient to cure said organopolysiloxane; and (III) dynamically vulcanizing the organopolysiloxane, wherein the weight ratio of fluorocarbon elastomer (A) to silicone base (B) in the elastomeric base composition ranges from 95:5 to 30:70 and wherein the fluorocarbon elastomer (A) has a glass transition point of less than 20Â° C.