Patent ID: 7276559

Claim:
A thermoplastic vulcanizate composition comprising: a) from about 2-10 wt %, based upon total polymer content weight a)+b)+c), of a thermoplastic polyethylene or polypropylene homopolymer, or ethylene-propylene copolymer, or copolymer that includes ethylene or propylene together with one or more C 4 to C 20 α-olefins, said thermoplastic having at least 25% crystallinity by DSC; b) from about 15 to about 36 wt. %, based upon total polymer content weight a)+b)+c), of a thermoplastic ethylene-α-olefin random or block copolymer having less than 5% crystallinity by DSC; c) from about 60 to about 80 wt. %, based upon total polymer content weight a)+b)+c), of a cross-linked elastomer; and d) from about 50 to about 65 wt %, based upon total composition weight a)+b)+c)+d), of a process oil; wherein said thermoplastic vulcanizate composition has a Shore A Hardness of less than 35 and wherein the relative amount of b) to a)+b) is greater than 75 wt % and less than or equal to 90 wt. %.