Highly filled soft polyolefin compositions

An article comprising a polyolefin composition comprising, by weight:

• (I) 30 to 50% by weight of an heterophasic polyolefin composition comprising the following fractions:
• A) from 8 to 25% by weight of a crystalline polymer fraction selected from:
• (i) a propylene homopolymer, having solubility in xylene at room temperature lower than 10% by weight;
• (ii) a copolymer of propylene and at least one alpha-olefin of formula H2C═CHR, where R is H or a C2-10 linear or branched alkyl, containing at least 85% by weight of propylene, having solubility in xylene at room temperature lower than 15% by weight;
• and
• (iii) a mixture of (i) and (ii):
• B) from 75 to 92% by weight of an elastomeric fraction comprising;
• (1) a first elastomeric copolymer of propylene with at least one alpha-olefin of formula H2C═CHR, where R is H or a C2-10 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said first elastomeric copolymer containing from 15 to 32% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 50% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 5.0 dl/g;
• and
• (2) a second elastomeric copolymer of propylene with at least one alpha-olefin of formula H2C═CHR, where R is H or a C2-10 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said second elastomeric copolymer containing more than 32% up to 45% 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 6.5 dl/g;
• the (1)/(2) weight ratio ranging from 1:5 to 5:1 and the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 6.5 dl/g;
• and
• (II) 50 to 70% by weight of an inorganic filler selected from flame-retardant inorganic fillers and inorganic oxides or salts.