Patent ID: 8153217

Claim:
A single- or multilayer threaded pipe, wherein at least one layer is produced from a polyolefin composition comprising (percentages based as a sum of components (A) and (B)): (A) 73 to 87 wt % of a heterophasic polypropylene composition comprising (percentages based on the heterophasic polypropylene composition): (1) 65-95 wt % of a propylene homopolymer insoluble in xylene at 25° C. in an amount over 85 wt %, comprising a polydispersity index ranging from 4 to 13, and an intrinsic viscosity ([η] 1 ) value of over 2.2 dl/g; and (2) 5-35 wt % of an olefin polymer of ethylene with propylene or a C 4 -C 10 alpha-olefin comprising an ethylene content ranging from 35 to 60 wt %, and an intrinsic viscosity of a fraction soluble in xylene ([η] 2 ) of at least 1.4 dl/g; wherein a ratio of the intrinsic viscosity value of the propylene polymer (1) to that of the olefin polymer (2) ([η] 1 /[η] 2 ) ranges from 0.45 to 1.6; and (B) 13-27 wt % of at least one filler selected among calcium carbonate, talc, wollastonite, or mixtures thereof.