| 摘要 |
<p>A polyolef?n compositions comprising, all percentages being by weight: A) from 50 to 85% of a polypropylene component having a solubility in xylene at room temperature lower than 20% by weight; B) from 3 to 20% of a copolymer of ethylene with C4-C10 a-olefin(s) having a solubility in xylene at room temperature greater than 50% by weight; C) from 10 to 35% of a copolymer component consisting of one or more copolymer(s) of ethylene with propylene, said copolymer component having an ethylene content equal to or higher than 60% by weight and a solubility in xylene at room temperature greater than 50% by weight; wherein the amounts of A), B) and C) are referred to the total weight of A) + B) + C) and the weight ratio B2/C2 of the content B2 of ethylene in B) to the content C2 of ethylene in C) is of 1.4 or less.</p> |
