Patent ID: 8487045

Claim:
A pipe comprising a heterophasic polyolefin composition, the heterophasic polyolefin composition comprising: 1) 70-90% by weight of a random copolymer of propylene with 0.5-6% by weight of 1-hexene having a PI of from 5 to 6 and an MFR lower than 1 g/10 min.; and 2) 10-30% by weight of a polymer of ethylene with a C 3 -C 10 α-olefin; and optionally a diene, wherein the polymer of ethylene has an ethylene content higher than 45% by weight and an intrinsic viscosity [η] value from 3 to 5 dl/g, having the relationship: [η]< A*C, wherein C is the ethylene content, by percent by weight, of the polymer of ethylene and A is a constant equal to 0.085 wherein the heterophasic polyolefin composition has a DBTT lower than −30° C.