	US 12,415,911 B2
	Polyethylene composition for filaments or fibers
Gianni Perdomi, Ferrara (IT); and Monica Galvan, Ferrara (IT)
Assigned to Basell Polyolefine GmbH, Wesseling (DE)
Appl. No. 17/779,773
Filed by BASELL POLYOLEFINE GMBH, Wesseling (DE)
PCT Filed Dec. 2, 2020, PCT No. PCT/EP2020/084319 § 371(c)(1), (2) Date May 25, 2022, PCT Pub. No. WO2021/110769, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 19213059 (EP), filed on Dec. 3, 2019.
Prior Publication US 2023/0075830 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 23/0807 (2025.01); D01F 6/26 (2006.01); D01F 6/30 (2006.01)

CPC C08L 23/0815 (2013.01) [D01F 6/30 (2013.01); C08L 2203/12 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); D10B 2321/021 (2013.01); D10B 2505/202 (2013.01)]

14 Claims

1. A polyethylene composition comprising:

A) from 75% to 97% by weight of a copolymer of ethylene with one or more comonomers selected from C₃-C₁₀alpha-olefins, wherein the copolymer has:

1) a density of 0.925 g/cm³or higher, measured according to ISO 1183-1:2012 at 23° C.; and

2) a MI₂value of 0.5 g/10 min. or greater, where MI₂is the Melt Index measured according to ISO 1133-2:2011 at 190° C. with a load of 2.16 kg;

B) from 3% to 25% by weight of a polyolefin composition comprising:

B^I) from 5% to 35% by weight of one or more propylene homopolymer(s) or one or more copolymer(s) of propylene with ethylene and/or C₄-C₈α-olefin(s), containing 90% or more of propylene units, or combinations of the homopolymers and copolymers; and component B^I) contains 10.0% by weight or less of a fraction soluble in xylene at 25° C. (XS^I), both the amount of propylene units and of the fraction XS^Ibeing referred to the weight of B^I);

B^II) from 20% to 50% by weight of a copolymer of ethylene and a one or more comonomers selected from C₃-C₁₀alpha-olefins, containing from 1.0% to 20.0% by weight of alpha-olefin units; and component B^II) contains 25.0% by weight or less of a fraction soluble in xylene at 25° C. (XS^II), both the amount of alpha-olefin units and of the fraction XS^IIbeing referred to the weight of B^II); and

B^III) from 30% to 60% by weight of a copolymer of ethylene and propylene containing from 25.0% to 75.0% by weight of ethylene derived units; and component B^III) contains from 40.0% to 95.0% by weight of a fraction soluble in xylene at 25° C. (XS^III), both the amount of ethylene units and of the fraction XS^IIIbeing referred to the weight of B^III);

the amounts of A) and B) being referred to the total weight of A)+B) and the amounts of B^I), B^II) and B^III) being referred to the total weight of B^I)+B^II)+B^III).