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US 10,526,478 B2Granted
Propylene copolymer composition
AssigneeBorealis AG
InventorsHermann Braun, Luca Boragno, Klaus Bernreitner, Sanna Martin, Tiina Suikkanen, Wolfram Stadlbauer
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Abstract
A propylene copolymer composition which comprises —a random copolymer of propylene (A), —a random copolymer of propylene (B), and —optional additive(s), suitable for pressure pipe applications.
Claims12
A propylene copolymer composition comprising:
- a polypropylene composition (a) comprising a multimodal polypropylene (a) comprising:
- (A) a random copolymer of propylene having:
- an MFR2 of 0.01 to 0.5 g/10 min (ISO 1133, 2.16 kg load, 230° C.),
- one or more comonomer(s) selected from ethylene or C4-C10 alpha olefins and having a comonomer content of 5.8 to 7.3 mol %;
- (B) a random copolymer of propylene having:
- an MFR2 of 0.1 to 15 g/10 min (ISO 1133, 2.16 kg load, 230° C.),
- one or more comonomer selected from ethylene or C4-C10 alpha olefins;
- wherein the random copolymer of propylene (A) has a lower MFR2 and higher comonomer content than the random copolymer of propylene (B);
- (C) optional β-nucleating agent;
- and
- (E) optional further additives other than the optional β-nucleating agent (C);
- wherein the propylene copolymer composition has an MFR2 of 0.15 to 0.30 g/10 min and a comonomer content of 2.8 to 9.9 mol %.
9 more elements
Dependencies are inferred from the claim text.