Propylene composition for foaming with improved mechanical properties
AssigneeBorealis AG
InventorsDaniela Mileva, Jingbo Wang, Klaus Bernreitner, Markus Gahleitner
Life of this patent
Estimating the term…
Abstract
A polypropylene composition (C) comprising: i) from 55.0 to 95.0 wt.-% of a heterophasic propylene copolymer (HECO), ii) from 5.0 to 45.0 wt.-% of a copolymer (CP), preferably a random copolymer, of propylene and at least one comonomer selected from the group of C4-C10 alpha-olefins that has been synthesized in the presence of a single-site catalyst, wherein the polypropylene composition (C) has a melt flow rate MFR2 of from 1.0 to 30.0 g/10 min, and wherein the polypropylene composition (C) has a Charpy Notched Impact Strength NIS of greater than or equal to 16.0 kJ/m2.
Claims14
A polypropylene composition (C) comprising:
- i) from 55.0 to 67.0 wt. %, based on the total weight of the polypropylene composition, of a heterophasic propylene copolymer (HECO) having a melt flow rate MFR2 measured according to ISO 1133 at 230° C. and 2.16 kg in the range from 10.0 to 40.0 g/10 min, and
- a xylene cold soluble fraction (XCS) determined at 23° C. according to ISO 16152 in the range from 25.0 to 40.0 wt. %,
- ii) from 25.0 to 45.0 wt. %, based on the total weight of the polypropylene composition, of a copolymer (CP) of propylene and at least one comonomer selected from the group of C4-C10 alpha-olefins that has been synthesized in the presence of a single-site catalyst and has a melt flow rate MFR2 measured according to ISO 1133 at 230° C. and 2.16 kg in the range from 0.2 to 7.0 g/10 min,
- wherein the polypropylene composition (C) has a melt flow rate MFR2 measured according to ISO 1133 at 230° C. and 2.16 kg of from 1.0 to 30.0 g/10 min, and wherein the polypropylene composition (C) has a Charpy Notched Impact Strength NIS measured according to ISO 179-1eA at 23° C. of greater than or equal to 16.0 KJ/m2.
Dependencies are inferred from the claim text.