Patent ID: 11952482
Assignee: BOREALIS AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A heterophasic polypropylene composition (C) comprising:
a) 60.0 to 85.0 wt. % of a first heterophasic propylene ethylene copolymer (HECO1), having:
i) a crystalline fraction (CF) determined according to CRYSTEX QC method ISO 6427-B, present in an amount in the range from 75.0 to 92.0 wt. %, relative to the total weight of HECO1;
ii) a soluble fraction (SF) determined according to CRYSTEX QC method ISO 6427-B, present in an amount in the range from 8.0 to 25.0 wt. %, relative to the total weight of HECO1;
iii) an intrinsic viscosity of the soluble fraction (IV(SF)) in the range from 2.00 to 4.00 dl/g;

b) 5.0 to 20.0 wt. % of a second heterophasic propylene ethylene copolymer (HECO2), being different to the first heterophasic propylene ethylene copolymer (HECO1), having
i) a soluble fraction (SF) determined according to CRYSTEX QC method ISO 6427-B, present in an amount in the range from 15.0 to 30.0 wt. %, relative to the total weight of HECO2;
ii) an intrinsic viscosity of the soluble fraction (IV(SF)) in the range from 2.5 to 5.0 dl/g; and

c) 5.0 to 20.0 wt. % of a polymer of ethylene (PE), being selected from an ethylene-based plastomer and an LDPE, having a density in the range from 895 to 925 kg/m3;
wherein the heterophasic polypropylene composition (C) has a melt flow rate MFR2, measured according to ISO 1133-1 at 230° C. at a load of 2.16 kg, in the range from 15.0 to 40.0 g/10 min, and a soluble fraction (SF) determined according to CRYSTEX QC method ISO 6427-B, present in an amount in the range from 5.0 to 23.0 wt. % relative to the total weight of the heterophasic polypropylene composition (C), and
wherein the combined amounts of the first heterophasic propylene ethylene copolymer (HECO1), the second heterophasic propylene ethylene copolymer (HECO2) and the polymer of ethylene (PE) are greater than or equal to 95 wt. %, relative to the total weight of the heterophasic polypropylene composition (C).