	US 12,485,656 B2
	Multilayer film
Jingbo Wang, Linz (AT); Markus Gahleitner, Linz (AT); Klaus Bernreitner, Linz (AT); Pauli Leskinen, Porvoo (FI); and Peter Niedersuss, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Filed by BOREALIS AG, Vienna (AT)
Filed on Jun. 6, 2022, as Appl. No. 17/833,052.
Application 17/833,052 is a division of application No. 17/273,372, previously published as PCT/EP2019/075299, filed on Sep. 20, 2019.
Claims priority of application No. 18196881 (EP), filed on Sep. 26, 2018.
Prior Publication US 2022/0297411 A1, Sep. 22, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 27/32 (2006.01); C08F 210/06 (2006.01); C08L 23/08 (2006.01); C08L 23/14 (2006.01)

CPC B32B 27/08 (2013.01) [B32B 27/325 (2013.01); B32B 27/327 (2013.01); C08F 210/06 (2013.01); C08L 23/08 (2013.01); C08L 23/142 (2013.01); B32B 2250/03 (2013.01); B32B 2250/246 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2553/00 (2013.01)]

14 Claims

1. Base polymer composition (BPC) comprising:

(a) 75 to 95 wt. %, based on the total weight of the base polymer composition (BPC), of a propylene 1-hexene copolymer (PHC) comprising a 1^stpropylene 1-hexene copolymer (PHC-1) and a 2^ndpropylene 1-hexene copolymer (PHC-2), and

(b) 5 to 25 wt. %, based on the total weight of the 2^ndbase polymer composition (BC2), of a plastomer (PL) having a density in the range of 0.860 to 0.930 g/cm³measured according to ISO 1183-187, said plastomer being an elastomeric copolymer of ethylene and at least one C₄to C₁₀α-olefin:

wherein:

(a1) said propylene 1-hexene copolymer (PHC) has an 1-hexene content in the range of 2.0 to 5.0 wt. %, based on the total weight of the propylene 1-hexene copolymer (PHC);

(a2) the propylene 1-hexene copolymer (PHC) has a xylene soluble fraction (XCS) determined at 25° C. according to ISO 16152 in the range of 0.3 to 15.0 wt. %, based on the total weight of the xylene soluble fraction (XCS) of the propylene 1-hexene copolymer (PHC);

(a3) said 1st propylene 1-hexene copolymer (PHC-1) has an 1-hexene content in the range of 0.7 to 2.5 wt. % based on the total weight of the 1^stpropylene 1-hexene copolymer (PHC-1);

(a4) said 2^ndpropylene 1-hexene copolymer (PHC-2) has an 1-hexene content in the range of 2.8 to 5.5 wt. % based on the total weight of the 2^ndpropylene 1-hexene copolymer (PHC-2);

(a5) the total amount of the 1st propylene 1-hexene copolymer (PHC-1) and the 2^ndpropylene 1-hexene copolymer (PHC-2) together based on the total weight of the propylene 1-hexene copolymer (PHC) is at least 95 wt. %; and

(a6) the weight ratio [(PHC-1)/(PHC-2)] between the 1^stpropylene 1-hexene copolymer (PHC-1) and the 2^ndpropylene 1-hexene copolymer (PHC-2) is in the range of 30/70 to 50/50; and

wherein the plastomer (PL) has a melt flow rate MFR₂(190° C./2.16 kg) measured according to ISO 1133 in the range of 0.1 to 1.1 g/10 min.