PROPYLENE-BASED TERPOLYMERS COMPOSITION FOR PIPES

摘要

1. A polyolefin composition comprising: A) from 85.0 wt% to 99.5 wt%; A terpolymer containing propylene, ethylene and 1- hexene wherein: (i) the content of 1-hexene derived units ranges from 1.0 wt% to 5.0%; (ii) the content of ethylene derived units is comprised between 0.5 wt% and 10.0 wt% (iii) the melting temperature ranges from 130° C to 145° C; B) from 0.5 wt% to 15 wt%; of a ethylene copolymer with a comonomer selected from 1-butene, 1-hexene and 1-Octene containing from 10 wt% to 50 wt% of 1-butene derived units aid copolymer having a MFR (measured at 190°C 2.16 kg of load) comprised between 0.5 g/10 min; wherein the resulting polyolefin composition has an melt flow rate (230°C/5 kg.. ISO 133) ranging from 0.2 g/10min to 4.0 g/10min; the sum A+B being 100.