Patent ID: 7291676

Claim:
A composition comprising: (I) 65 to 90% by weight of an heterophasic polyolefin composition comprising the following fractions: A) from 10 to 25% by weight of a crystalline polymer fractions selected from the group consisting of: (i) a propylene homopolymer, having solubility in xylene at room temperature lower than 5% by weight; (ii) a copolymer of propylene and at least one alpha-olefin of formula H 2 C═CHR 1 , where R 1 is H or a C 2-10 linear or branched alkyl, containing at least 90% by weight of propylene, having solubility in xylene at room temperature lower than 10% by weight; and (iii) a mixture of (i) and (ii); and B) from 75 to 90% by weight of an elastomeric fraction comprising an elastomeric copolymer of propylene or ethylene with at least another alpha-olefin of formula H 2 C═CHR 2 , where R 2 is H or a C 1-10 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said elastomeric copolymer containing from 20 to 50% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 80% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 4.0 to 5.5 dl/g; (II) 5 to 15% by weight of an oxidized polyethylene wax having an acid number ranging from 5 to 35 mg KOH/g, a molecular weight Mn of 1000 to 100,000, and a melting point comprised between 92° C. and 140° C.; and (III) 5 to 20% by weight of a styrene block copolymer.