Patent ID: 7754815

Claim:
A process for producing a thermoplastic elastomer composition, which comprises the step of crosslinking dynamically at least the following components (A) to (C) in the presence of a crosslinking agent: (A) 10 to 50% by weight of an oil-extended ethylene-α-olefin-non-conjugated diene copolymer rubber having a density of 850 to 900 kg/m 3 , and a Mooney viscosity (ML 1+4 100° C.) of 30 to 150; (B) 20 to 60% by weight of an ethylene-α-olefin copolymer having a density of 850 to 880 kg/m 3 , and a melt flow rate of 0.05 to 80 g/10 minutes measured at 230° C. under a load of 21.18 N; and (C) 20 to 60% by weight of a propylene resin, wherein the total amount of the components (A) to (C) is 100% by weight.