	US 11,746,224 B2
	Heterophasic polypropylene with propylene hexene random copolymer as matrix
Markus Gahleitner, Linz (AT); Jingbo Wang, Linz (AT); Klaus Bernreitner, Linz (AT); Pauli Leskinen, Porvoo (FI); and Johanna Lilja, Porvoo (FI)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/49,386
Filed by BOREALIS AG, Vienna (AT)
PCT Filed May 7, 2019, PCT No. PCT/EP2019/061689 § 371(c)(1), (2) Date Oct. 21, 2020, PCT Pub. No. WO2019/215156, PCT Pub. Date Nov. 14, 2019.
Claims priority of application No. 18171561 (EP), filed on May 9, 2018.
Prior Publication US 2021/0253839 A1, Aug. 19, 2021
Int. Cl. C08L 23/14 (2006.01)

CPC C08L 23/142 (2013.01) [C08L 2203/10 (2013.01); C08L 2205/025 (2013.01); C08L 2207/02 (2013.01); C08L 2314/06 (2013.01)]

13 Claims

1. A polypropylene composition comprising a blend of:

(a) a propylene copolymer comprising 2.5 to 12.0 wt %, based on the weight of the propylene copolymer, of 1-hexene as a comonomer, and having a melt flow rate MFR₂of 0.5 to 20.0 g/10 min, and

(b) an ethylene homo- or copolymer having a melt flow rate MFR₂of 0.05 to 30.0 g/10 min and a density of 850 to 940 kg/m³, wherein the ethylene copolymer comprised by the ethylene homo- or copolymer (b) is an ethylene propylene copolymer comprising 6.0 to 25.0 wt % of ethylene,

wherein the xylene cold solubles (XCS) content of the polypropylene composition is from 5.0 to 30.0 wt %, and

wherein the content of hexane extractables according to FDA of the polypropylene composition is below 1.5 wt %.