Importance

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Abstract

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;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: a content of butene-1 derived units of 75% or more;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 equal to or lower than 90 points, wherein the content of butene-1, if present, is of less than 50%;in which 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).

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First Claim