Borealis Ag

Matthias Hoff

Pauli Leskinen

Markus Gahleitner

Jingbo Wang

Klaus Bernreitner

Luigi Resconi

Kauno Alastalo

Daniela Mileva

Markku Vahteri

Friedrich Berger

Luca Boragno

Davide Tranchida

Qizheng Dou

Shital Das

The invention provides a multimodal propylene butene random copolymer having a melt flow rate (MFR) of 1.0 to 20.0 g/10 min and a butene content of 5.0 to 20.0 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 MFRof 0.5 to 20.0 g/10 min and a butene content of 2.0 to 10.0 wt %; and (ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFRof 0.5 to 20.0 g/10 min and a butene content of 4.0 to 20.0 wt %; wherein copolymers (A) and (B) are different.

Propylene butene copolymer

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.

The invention provides a polyolefin composition comprising: (i) 55 to 95 wt % of a propylene butene random copolymer having an MFRof 1.0 to 20.0 g/10 min, a butene content of 1.5 to 8.0 wt % and prepared using a single site catalyst; and (ii) to 45 wt % of an ethylene based plastomer having a density of 860 to 905 kg/m, an MFRof 0.3 to 30 g/10 min and prepared using a single site catalyst.

Heterophasic polyolefin composition

The application provides a bimodal polypropylene random copolymer with good response to nucleating agents, increased crystallization temperature, good mechanical and optical properties, as well as low amounts of extractables and good processability in the sense of high Melt Flow Rate. The present invention further relates to articles made thereof, and the use of the bimodal polypropylene random copolymer for specific applications. It also relates to a process for the preparation of said bimodal polypropylene random copolymer.

Bimodal polypropylene random copolymer

The invention relates to a polypropylene composition which combines low sealing initiation temperature (SIT) and high melting point (Tm), thus having a broad sealing window.

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Linz, Austria

Matthias Hoff