Propylene-based terpolymers composition for pipes

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 m...

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Hauptverfasser: GALVAN, MONICA, CAVALIERI, CLAUDIO, PELLEGATTI, GIAMPAOLO, TERWYEN, HERBERT
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung: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 10.0 wt%; of a propylene, ethylene copolymer composition comprising: b1) from 12 wt% to 52 wt%; of a propylene homopolymer or a propylene/ethylene copolymer having a content of ethylene derived units ranging from 0.1 wt% to 4.5 wt%; and having a xylene soluble content measured at 25°C lower than 10 wt%; b2) from 48 wt% to 88 wt% of a propylene ethylene copolymer having a content of ethylene derived units ranging from 15.0 wt% to wt% to 42.0 wt%; wherein the resulting polyolefin composition has an melt flow rate (230°C/5 kg.. ISO 1133) ranging from 0.2 g/10min to 4.0 g/10min; the sum A+B being 100 and the sum b1+b2 being 100.