Patent ID: 7718727

Claim:
A method for preparing a fluoroplastic composition comprising: (I) mixing (A) a fluorocarbon resin having a glass transition temperature above 23° C., (B) a compatibilizer selected from the group consisting of; (B′) organic compounds which contain 2 or more olefin groups, (B″) organopolysiloxanes containing at least 2 alkenyl groups and (B′″) olefin-functional silanes which also contain at least one hydrolyzable group or at least one hydroxyl group attached to a silicon atom thereof (C) an organic peroxide catalyst, (II) mixing the product of step (I) with (D) a silicone base comprising a diorganopolysiloxane gum consisting of (R 3 SiO 0.5 ), (R 2 SiO), (RSiO 1.5 ), and/or O units (SiO 2 ) structural units where R is independently any monovalent hydrocarbon group, and contains at least 2 alkenyl groups having 2 to 20 carbon atoms, wherein the diorganopolysiloxane gum has a sufficient molecular weight to impart a Williams plasticity number of at least 30 as determined by the American Society for Testing and Materials (ASTM) test method D 926, (E) a radical initiator in an amount sufficient to cure said diorganopolysiloxane; and (III) dynamically vulcanizing the diorganopolysiloxane wherein the weight ratio of fluorocarbon resin (A) to silicone base (D) in the elastomeric base composition ranges from 95:5 to 30:70.