Patent ID: 7951871

Claim:
A method for preparing a thermoplastic vulcanizate, the method comprising: dynamically vulcanizing a rubber within a blend that excludes functionalized resins and includes the rubber and a thermoplastic polymer at a temperature above the melting point of the thermoplastic polymer, where the rubber includes an olefinic elastomeric copolymer including one or more diene units deriving from 5-ethylidene-2-norbornene, where said dynamically vulcanizing is effected with a cure system that includes a hydrosilating agent and a catalyst, where the hydrosilating agent includes a compound including at least 3 silicon hydride groups defined by the formula where each R is independently a monovalent organic group or hydrogen, and where the silicon atoms of the respective silicon hydride groups are spatially separated by at least 6 atoms, where the ratio of equivalents of silicon hydride groups associated with the hydrosilating agent to the equivalents of vinyl double bonds associated with the rubber is from about 0.7:1 to about 10:1.