Borealis Technology Oy

Borealis A/s

Nina Manner

Ali Harlin

Amir K Karbasi

Pirjo Jääskeläinen

Päivi Huovinen

The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. The polymers are produced by subjecting propylene and optionally other olefins to polymerization in a plurality of polymerization reactors connected in series, employing different amounts of hydrogen as a molar mass modifier in at least two of the reactors, and carrying out the polymerization reaction in the presence of a catalyst system capable of catalyzing the formation of a high molar mass polymerization product having a MFRof less than 0.1 g/10 min and a low or medium molar mass polymerization product having a MFRof more than 0.5 g/10 min.

High melt strength polypropylene

The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. The polymers are produced by subjecting propylene and optionally other olefins to polymerization in a plurality of polymerization reactors connected in series, employing different amounts of hydrogen as a molar mass modifier in at least two of the reactors, and carrying out the polymerization reaction in the presence of a catalyst system capable of catalyzing the formation of a high molar mass polymerization product having a MFRof less than 0.1 g/l0 min and a low or medium molar mass polymerization product having a MFRof more than 0.5 g/10 min.

Growing community of inventors

Vantaa, Finland

Nina Manner