Propylene butene copolymer

US11981782B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Jingbo Wang · Linz, AT
• Markus Gahleitner · Ansfelden, AT
• Klaus Bernreitner · Linz, AT
• Pauli Leskinen · Porvoo, FI
• Matthias Hoff · Linz, AT

Key dates

• Filing date: Nov 14, 2019
• Grant date: May 14, 2024
• Expiry date: Aug 20, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2314/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a multimodal propylene butene random copolymer having a melt flow rate (MFR2) of 1.0 to 20.0 g/10 min and a butene content of 1.5 to 8.0 wt %, wherein said copolymer is prepared using a single site catalyst and wherein said copolymer comprises (i) 30 to 70 wt % of a propylene butene copolymer (A) having an MFR2 of 0.5 to 20.0 g/10 min and a butene content of 0.5 to 10.0 wt %; and (ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFR2 of 0.5 to 20.0 g/10 min and a butene content of 1.0 to 8.0 wt %; wherein copolymers (A) and (B) are different.