Patent ID: 8846815

Claim:
A thermoplastic vulcanizate comprising: a dynamically cured rubber, where the rubber is fully cured by a peroxide; and a thermoplastic phase, where 100% by weight of the thermoplastic phase includes an ultrahigh molecular weight plastic, where the ultrahigh molecular weight plastic is a propylene-based polymer including greater than 90 mole percent propylene mer units and is characterized by a weight average molecular weight (M w ) that is from 3.0×10 6 to 3,968×10 6 g/mole, a molecular weight distribution (Mw/Mn) of from 2.5 to less than 5, stereo defects of less than 50 per 10,000 carbon atoms, and a meso pentad fraction of greater than 96 mole % mmmm pentads, wherein the rubber is dynamically cured in the presence of the ultrahigh molecular weight plastic.