Patent ID: 8669327

Claim:
A cross-linked composition obtained by cross-linking a polyolefin composition (I) comprising, all percentages being by weight: A) from 5 to 38% of a polypropylene component comprising a propylene homopolymer or a propylene copolymer with at least one α-olefin comonomer, said polypropylene component containing at least 85% of propylene and having a solubility in xylene at room temperature lower than 20%; B) from 35 to 85% of a copolymer of ethylene with propylene, containing from 42 to 70% of ethylene and having solubility in xylene at room temperature greater than 50%; C) from 5 to 40% of a butene-1 homopolymer or copolymer having: (i) a content of butene-1 derived units of 75% or more; (ii) a flexural modulus of 100 MPa or less; and optionally, D) from 5 to 35% of one or more polymers different from B) in composition, having a Shore A hardness value of at most 90 points, wherein in component D) optionally comprises butene-1 and has a butene-1 content of less than 50 wt. % based upon the total weight of component D); wherein in composition (I) the amounts of A), B), C) and D) are referred to the total weight of A)+B)+C) and optionally D), and when D) is present, the total weight of C)+D) is of 50% or less, referred to the total weight of A)+B)+C)+D).