	US 12,234,308 B2
	Polyethylene with a high vinyl content and beneficial rheological properties
Annika Smedberg, Stenungsund (SE); Villgot Englund, Stenungsund (SE); and Emil Hjärtfors, Stenungsund (SE)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 16/770,707
Filed by BOREALIS AG, Vienna (AT)
PCT Filed Dec. 18, 2018, PCT No. PCT/EP2018/085564 § 371(c)(1), (2) Date Jun. 8, 2020, PCT Pub. No. WO2019/121731, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17208192 (EP), filed on Dec. 18, 2017.
Prior Publication US 2021/0163644 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/18 (2006.01); C08L 23/06 (2006.01); H01B 3/44 (2006.01)

CPC C08F 210/18 (2013.01) [C08L 23/06 (2013.01); H01B 3/441 (2013.01); C08L 2203/202 (2013.01); C08L 2203/30 (2013.01); C08L 2207/066 (2013.01); C08L 2312/00 (2013.01)]

11 Claims

1. A polyethylene, characterized in that:

the polyethylene contains a total amount of vinyl groups of from 0.89 to 1.34 per 1000 carbon atoms;

the polyethylene has a complex viscosity (η*) at 0.05 rad/sec, wherein the complex viscosity at 0.05 rad/sec is X Pas, and X₁≤X≤X₂, wherein X₁is 18500 and X₂is 20000; and

the polyethylene has a complex viscosity (η*) at 300 rad/sec, wherein the complex viscosity at 300 rad/sec is Y Pas, and Y₁≤Y≤Y₂, wherein Y₁is 316 and Y₂is 330;

wherein both complex viscosities (η*) are determined according to method ISO 6721-1 on stabilized samples of the polyethylene;

wherein the polyethylene has a melt flow rate at 2.16 kg loading (MFR₂) of from 0.92 to 0.94 g/10 min, when determined according to method ISO 1133-1:2011 at 190° C.; and

the polyethylene is an unsaturated low density polyethylene (LDPE) homopolymer or copolymer.