Patent ID: 8895123

Claim:
A multilayer pipe comprised of a plurality of layers, at least one of the layers being comprised of: a β-nucleated propylene polymer that is: a propylene homopolymer having melt index of 0.05 to 10 g/10 min at 230° C. at a load of 2.16 kg that is β-nucleated, a propylene block copolymer of 90.0 to 99.9% by weight propylene and 0.1 to 10.0% by weight of one or more α-olefins having 2 or 4 to 18 carbon atoms and a melt index of 0.05 to 15 g/10 min at 230° C. at a load of 2.16 kg that is β-nucleated, or a mixture of both; wherein the normalized impact energy E D of the multilayer pipe is at least 600 Nm/m, and further wherein the β-nucleated propylene homopolymer has an IRτ≧0.98, a tensile modulus of ≧1500 MPa at +23° C. and a notched Charpy impact strength at −20° C., of ≧3 kJ/m 2 and the β-nucleated propylene block copolymer has an IRτ≧0.98, a tensile modulus of ≧1100 MPa at +23° C. and a notched Charpy impact strength ≧6 kJ/m 2 at −20° C.