Patent ID: 7935763

Claim:
A peroxide-cured thermoplastic vulcanizate composition comprising from 20 to 80% by weight of an at least partially cured ethylene-propylene-diene elastomer and from 80 to 20% by weight of a thermoplastic; wherein the thermoplastic vulcanizate is cured in the presence of from about 0.05 to about 12 parts by weight of trimetholpropane trimethacrylate per 100 parts by weight elastomer and from about 0.02 to about 6 parts by weight of bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite per 100 parts by weight elastomer a phenolic stabilizer, and a synthetic hydrotalcite acid scavenger, where upon extrusion, the thermoplastic vulcanizate is characterized by forming an extrudate that does not show die-lip build up 5 minutes after the beginning of extrusion.