Patent ID: 7572859

Claim:
Polyolefin compositions comprising, in percent by weight based on a total weight of the polyolefin compositions: 1) 55-90% of a crystalline propylene homopolymer or copolymer containing up to 15% of at least one of ethylene and C 4 -C 10 α-olefin(s) and having a value of MFR (230° C., 2.16 kg) of at least 25 g/10 min; and 2) 10-45% of a copolymer of ethylene with at least one C 4 -C 10 α-olefin(s) containing from 10 to 40% of said C 4 -C 10 α-olefin(s); said compositions having MFR values of at least 20 g/10 min, a total content of ethylene of at least 20%, a total content of C 4 -C 10 α-olefin(s) of at least 4.5%, a ratio of the total content of ethylene to the total content of C 4 -C 10 α-olefin(s) of at least 2.3, a total fraction soluble in xylene at room temperature of less than 18 wt % and an intrinsic viscosity value of the fraction soluble in xylene at room temperature of at most 1.7 dl/g.