| abstract |
The present invention comprises (i) from 1 to 20% by weight of an α-olefin, a g 'ratio measured at interpolymer number average molecular weight (Mn) is less than 1, MFR (2.16 kg, 230 ° C.) is at least 0.01, A propylene / α-olefin copolymer characterized by a density of 0.850 g / cc or more and a molecular weight distribution, Mw / Mn of 3.5 or less, and (ii) a first propylene polymer selected from the group consisting of a combination thereof 5 weight percent to 95 weight percent of the first component, based on the total weight of the thermoplastic vulcanizing composition; And a curable or vulcanizable rubber having a density of 0.85 to 0.88 g / cc, an I 2 of 0.001 to 5 g / 10 minutes, a Mooney viscosity of 5 to 400, and a combination thereof. The component comprises 5% to 95% by weight, based on the total weight of the thermoplastic vulcanized composition; At least one of the rubbers is vulcanizable; The tensile strength at break is at least 8 MPa and the tear strength at 23 ° C. is at least 190 lb-f / in to provide a thermoplastic vulcanizing composition. The invention also provides methods of making the compositions and articles made from the compositions. |