Borealis Ag

Sameli Hakola

Luigi Resconi

Pauli Leskinen

Kauno Alastalo

Klaus Nyfors

Kristin Reichelt

Christelle Grein

Juha Paavilainen

Daniel Sandholzer

Method for preparing olefin polymer in a loop reactor, said loop reactor comprises a first outlet for withdrawing polymer slurry from the loop reactor, and a second outlet for withdrawing a polymer slurry from the loop reactor, wherein the first outlet is located such that polymer slurry is withdrawn having a concentration of polymer which is equal or higher than the average concentration of polymer in the loop reactor, and the second outlet is located such that polymer slurry is withdrawn having a concentration of polymer which is lower than the average concentration of polymer in the loop reactor, the method comprises the steps of supplying olefin monomers and a catalytic system to the loop reactor to form a polymer slurry in the loop reactor, and controlling the total amount of polymer and/or the total amount of polymer slurry withdrawn from the loop reactor by adjusting the ratio of polymer slurry withdrawn through the first outlet and polymer slurry withdrawn through the second outlet.

Loop reactor providing an advanced production split control

The present invention relates to a polypropylene composition comprising comonomer units derived from ethylene in an amount of from 1.5 wt % to 35 wt %, and from at least one Calpha-olefin in an amount of from 1.0 mol % to 3.0 mol %, wherein the polypropylene composition has an amount of xylene solubles XS of at least 40 wt %, and the xylene solubles have an amount of ethylene-derived comonomer units of from 4.0 wt % to 70 wt %.

Polypropylene composition combining softness, toughness, low haze and high thermal resistance

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Helsinki, Finland

Sameli Hakola