Patent ID: 8722803

Claim:
A polymer composition comprising (percent by weight): a) 70-84% of a crystalline propylene polymer having an amount of isotactic pentads (mmmm), measured by 13 C-MNR on the fraction insoluble in xylene at 25° C., higher than 97.5 molar % and a polydispersity index ranging from 5 to 10; b) 8-15% of an elastomeric copolymer of ethylene and propylene, wherein the elastomeric copolymer has: an amount of recurring units deriving from ethylene ranging from 30 to 50 wt. %, based on the total weight of the elastomeric copolymer, and a polymer fraction that is soluble in xylene at ambient temperature, wherein the polymer fraction soluble in xylene has an intrinsic viscosity value ranging from 2.5 to 3.5 dl/g; and c) 8-15% of an ethylene homopolymer having an intrinsic viscosity value ranging from 1.5 to 4 dl/g; wherein the polymer composition has a value of melt flow rate ranging from 55 to 90 g/10 min, and an amount of hexane extractables lower than 3.5 wt. %.