Patent ID: 7786204
Filing Date: 2010-08-31
Classification: C08K

Abstract:
1. A propylene polymer composition comprising A) 70 to 98 wt.-% of a heterophasic propylene copolymer with ethylene or an alpha-olefin with 4 to 12 carbon atoms, the propylene copolymer, which contains more than 60 wt.-% propylene, having a melt flow rate (MFR B) 2 to 30 wt.-% of calcium carbonate, C) 0.0001 to 1.0 wt.-% of a β-nucleating agent promoting the β-modification of the propylene copolymer, said composition having a content of β-modification of more than 50% determined by differential scanning calorimetry (DSC) and an impact strength at −20° C. which is at least 50% higher than the impact strength of the propylene copolymer (A).