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US 2024/0287224 A1Published application
Polyethylene copolymer for a film layer
AssigneeBorealis AG
InventorsQizheng DOU, Friedrich BERGER, Matthias HOFF
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a metallocene-catalysed multimodal polyethylene copolymer, and to use of the multimodal copolymer of ethylene in film applications, and to a film including a polymer composition of the disclosure.
Claims15
-14. (canceled)
A metallocene-catalysed multimodal polyethylene copolymer (P), which consists of:
- (i) 35.0 to 50.0 wt % of an ethylene-1-butene polymer component (A), and
- (ii) 50.0 to 65.0 wt % of an ethylene-1-hexene polymer component (B),
- wherein the ethylene-1-butene polymer component (A) has;
- a density in a range of from 920 to 950 kg/m3,
- an MFR2 (190° C., 2.16 kg, ISO 1133) in a range of from 2.0 to 20.0 g/10 min,
- a 1-butene content in a range of 0.1 to 2.0 mol %, based on the ethylene-1-butene polymer component (A);
- wherein ethylene-1-butene polymer component (A) consists of an ethylene-1-butene polymer fraction (A-1) and an ethylene-1-butene polymer fraction (A-2),
- wherein the ethylene polymer fraction (A-1) has a density in a range of from 920 to 960 kg/m3 and an MFR2 (190° C., 2.16 kg, ISO 1133) in a range of from 1.0 to 15.0 g/10 min, and
- the ethylene polymer fraction (A-2) has a density in a range of from 925 to 950 kg/m3, and an MFR2 and (190° C., 2.16 kg, ISO 1133) a range of 1.0 to 15.0 g/10 min;
- wherein the ethylene polymer component (B) has;
- a density in a range of from 890 to 920 kg/m3,
- an MFR2 (190° C., 2.16 kg, ISO 1133) in a range of from 0.1 to 2.0 g/10 min,
- a 1-hexene content in a range of 2.5 to 10.0 mol % based on the ethylene-1-hexene polymer compound (B);
- wherein the multimodal polyethylene copolymer (P) has;
- a density in a range of from 915 to 925 kg/m3,
- an MFR2 (190° C., 2.16 kg, ISO 1133) in a range of from 1.0 to 3.0 g/10 min,
- a molecular weight distribution, Mw/Mn, determined with GPC in a range of at least 4.6 up to 7.0,
- a ratio of the weight average molecular weight, Mw of the low crystalline fraction (LCF) to the weight average molecular weight (Mw) of the high crystalline fraction (HCF), Mw(Tp(LCF)/Mw(Tp(HCF), determined as described in an experimental part In a range of from 1.8 to 4.0, and
- a half peak breadth of the low crystalline fraction (LCF) in a TREF profile with Log M>5.2, determined as described in the experimental part, in a range of 5.0 to 20.0.
16 more elements
Dependencies are inferred from the claim text.