Patent ID: 8598277

Claim:
Polyolefin compositions comprising, all percentages being by weight: A) from 70 to 95% of at least one copolymer of propylene with at least one comonomer selected from ethylene, a C 4 -C 8 α-olefin and combinations thereof, where the comonomer content in (A) is from 5 to 25%, wherein component A) comprises, all percentages being by weight based upon the total weight of component A): A I ) 15-80% of at least one copolymer of propylene selected from the group consisting of: (A I 1) propylene/ethylene copolymers containing 1-7% of ethylene; (A I 2) copolymers of propylene with at least one C 4 -C 8 α-olefin, containing from 2 to less than 14% of the C 4 -C 8 α-olefins; and (A I 3) copolymers of propylene with ethylene and at least one C 4 -C 8 α-olefin containing 0.5-4.5% of ethylene and 2-6% of C 4 -C 8 α-olefins, provided that the total content of ethylene and C 4 -C 8 α-olefins in (A I 3) be equal to or lower than 6.5%; A II ) 20-85% of at least one copolymer of propylene selected from the group consisting of: (A II 1) copolymers of propylene with at least one C 4 -C 8 α-olefin, containing from 14% to 30% of C 4 -C 8 α-olefins; (A II 2) copolymers of propylene with ethylene and at least one C 4 -C 8 α-olefin containing 0.5-5% of ethylene and 9-30% of C 4 -C 8 α-olefins; and B) from 5 to 30% of a butene-1 (co)polymer having: a content of butene-1 derived units of at least 75 wt %; and a flexural modulus of at most 60 MPa.