	US 12,065,514 B2
	Polyethylene having high pressure resistance and crosslinked polyethylene pipe comprising the same
Sol Cho, Daejeon (KR); Hyunsup Lee, Daejeon (KR); Sun Mi Kim, Daejeon (KR); Yi Young Choi, Daejeon (KR); Myunghan Lee, Daejeon (KR); and Yeonsoo Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/414,616
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Feb. 20, 2020, PCT No. PCT/KR2020/002467 § 371(c)(1), (2) Date Jun. 16, 2021, PCT Pub. No. WO2020/171623, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 10-2019-0020026 (KR), filed on Feb. 20, 2019; and application No. 10-2020-0020643 (KR), filed on Feb. 19, 2020.
Prior Publication US 2022/0135712 A1, May 5, 2022
Int. Cl. C08F 110/02 (2006.01); C08F 4/659 (2006.01); C08F 4/6592 (2006.01); C08J 3/24 (2006.01); C08K 5/14 (2006.01); C08L 23/06 (2006.01); F16L 11/04 (2006.01)

CPC C08F 110/02 (2013.01) [C08F 4/65916 (2013.01); C08F 4/65927 (2013.01); C08J 3/24 (2013.01); C08K 5/14 (2013.01); C08L 23/06 (2013.01); F16L 11/04 (2013.01); C08L 2203/18 (2013.01); C08L 2207/062 (2013.01); C08L 2312/00 (2013.01); C08L 2314/06 (2013.01)]

13 Claims

1. A polyethylene which satisfies:

a density of 0.940 g/cm³or more and 0.960 g/cm³or less as measured according to ASTM D792;

a number average molecular weight (Mn) of 20,000 g/mol or more and 70,000 g/mol or less;

a weight average molecular weight (Mw) of 100,000 g/mol or more and 250,000 g/mol or less;

a polydispersity index (PDI, Mw/Mn) of 2.5 or more and 3.7 or less; and

a melt index (MI_21.6) of 1 g/10 min or more and 20 g/10 min or less as measured at a temperature of 190° C. under a load of 21.6 kg according to ASTM D1238,

wherein the integration value in a region where a log Mw value is 4.5 or less is 25% or less of the total integration value in a GPC curve graph in which the x axis is log Mw and the y axis is dw/dlog Mw.