Patent ID: 6294611
Filing Date: 2001-09-25
Classification: C08F,C08L

Abstract:
An olefin thermoplastic elastomer composition consisting essentially of the following components (A) and (B), said composition obtainable by first polymerizing a monomer of the component (A) and then polymerizing monomers of the component (B), said composition having such fractionation properties that, in temperature rising elution fractionation in the temperature range of 0 to 140.degree. C. using o-diclilorobenzene as a solvent, the eluate obtained at 0.degree. C. is 35 to 60% by weight based on the total elution weight and the eluate obtained at 80 to 100.degree. C. is 1 to 5% by weight based on the total elution weight:(A) 30 to 60% by weight, based on the whole composition, of a propylene homopolymer component having an isotactic index of not less than 90%; and(B) 40 to 70% by weight, based on the whole composition, of a copolymer of propylene with other .alpha.-olefin having 2 to 8 carbon atoms, said copolymer comprising propylene and ethylene, wherein the content of .alpha.-olefin other than propylene in xylene solubles at room temperature in the component (B) is not less than 40% by weight.