Patent ID: 6100333
Filing Date: 2000-08-08
Classification: C08K

Abstract:
A polyolefin composition comprising:(A) between 30 and 40 parts by weight of a crystalline propylene polymer having an isotacticity index greater than 80, selected from polypropylene homopolymer and propylene copolymers containing 0.5 to 15 mol % of ethylene and/or an .alpha.-olefin having 4 to 10 carbon atoms, the propylene polymer having a molecular weight distribution (MWD) greater than 3.5; and(B) between 70 and 80 parts by weight of an elastomeric ethylene copolymer with olefins CH.sub.2 =CHR, in which R is an alkyl group having 1 to 10 carbon atoms, and, optionally, containing minor proportions of units derived from a polyene, the copolymer containing 40 to 70% by weight of units derived from ethylene and 30 to 60% by weight of units derived from the .alpha.-olefin, and having the following characteristics: (a) a molecular weight distribution lower than 3.5, (b) a crystallinity content, expressed as the enthalpy of fusion, lower than 30 J/g, and (c) a content of 2-1 regioinvertions of the .alpha.-olefin units of lower than 5%.