Patent ID: 6908967

Claim:
A polyolefin composition comprising: A) 14-18 parts by weight of a homopolymer of propylene or a copolymer of propylene with ethylene and/or one or more CH 2 ═CHR α-olefins, where R is an alkyl radical having 2 to 6 carbon atoms, said copolymer containing at least 95% by weight of propylene derived units; B) 5-18 parts by weight of a propylene copolymer fraction containing ethylene derived units, said fraction being insoluble in xylene at room temperature; and C) 72-80 parts by weight of a propylene copolymer fraction containing units derived from a comonomer selected from ethylene and mixtures of ethylene with one or more CH 2 ═CHR α-olefin, where R is an alkyl radical having 2 to 6 carbon atoms, said fraction being soluble in xylene at room temperature, said fraction also containing from 15 to 23% by weight of units derived from said comonomer; the percent by weight of the sum of the B and C fractions with respect to the total polyolefin composition being from 82% to 86%, wherein the haze of said composition is less than 25%, wherein the quantity of ethylene plus optional α-olefin in the total composition is from 15 to 22% by weight, and wherein a difference in the weight percent ethylene content of fraction B) and the weight percent ethylene content of fraction C) is not more than 1.8 weight percent.