# US 10,766,988 B2 · Ethylene/alpha-olefin copolymer having excellent processibility

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- Number: US 10,766,988 B2
- Document ID: US10766988B2
- Status: Granted
- Kind: B2
- Application number: 16/094,722
- Filed: 2017-11-02
- Published: 2019-04-25
- Granted: 2020-09-08
- Earliest claimed: 2016-11-15
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Soon Ho Sun; Yi Young Choi; Ki Soo Lee; Bog Ki Hong; Sung Hyun Park; Myung Han Lee; Sung Min Lee; Sun Mi Kim; Jin Young Park
- Web page: https://patentgrep.com/patent/US10766988B2

## CPC

- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08F 4/65908: {in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+}
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08F 4/65916: {supported on a carrier, e.g. silica, MgCl2, polymer}
- C08F 2420/07: Heteroatom-substituted Cp, i.e. Cp or analog where at least one of the substituent of the Cp or analog ring is or contains a heteroatom
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

The present disclosure relates to an ethylene/alpha-olefin copolymer having excellent processibility. The ethylene/alpha-olefin copolymer according to the present disclosure is excellent in both mechanical properties and processibility.

## Claims

### Claim 1

An ethylene/alpha-olefin copolymer having:
a weight average molecular weight of 180,000 to 250,000 g/mol,
a molecular weight distribution (Mw/Mn) of 5 to 20,
a density of 0.950 to 0.965 g/cm3,
a melt flow rate ratio MFR5/MFR2.16, measured at 190° C. according to ASTM 1238 of 5 to 10, and
a spiral flow length of 15 to 25 cm, wherein the spiral flow length is evaluated by using a mold having a thickness of 1.5 mm, an injection temperature of 190° C., a mold temperature of 50° C., and an injection pressure of 90 bar,
wherein the ethylene/alpha-olefin copolymer is prepared by polymerizing ethylene and alpha-olefin in the presence of a supported single metallocene catalyst including a metallocene compound of the following Chemical Formula 1; an aluminum-containing first cocatalyst; a borate-based second cocatalyst; and a support:
(Cp1R1)n(Cp2R2)MX3-n [Chemical Formula 1]
in Chemical Formula 1,
M is a Group 4 transition metal;
Cp1 and Cp2 are same as or different from each other, and are each independently any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl, and fluorenyl radical, provided that both Cp1 and Cp2 are not cyclopentadienyl, and they are optionally substituted with a C1 to C20 hydrocarbon;
R1 and R2 are same as or different from each other, and are each independently hydrogen, a C1 to C20 alkyl, a C1 to C10 alkoxy, a C2 to C20 alkoxyalkyl, a C6 to C20 aryl, a C6 to C10 aryloxy, a C2 to C20 alkenyl, a C7 to C40 alkylaryl, a C7 to C40 arylalkyl, a C8 to C40 arylalkenyl, or a C2 to C10 alkynyl;
X is a halogen atom, a C1 to C20 alkyl, a C2 to C10 alkenyl, a C7 to C40 alkylaryl, a C7 to C40 arylalkyl, a C6 to C20 aryl, a substituted or unsubstituted C1 to C20 alkylidene, a substituted or unsubstituted amino, a C2 to C20 alkylalkoxy, or a C7 to C40 arylalkoxy; and
n is 1 or 0.

### Claim 2 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein the weight average molecular weight is 180,000 to 220,000 g/mol.

### Claim 3 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein the molecular weight distribution (Mw/Mn) is 10 to 15.

### Claim 4 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein the melt flow rate ratio is 5 to 8.

### Claim 5 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein a C2 value of Equation 1 is −1.0 to −0.4, when a graph of complex viscosity (η*[Pa·s]) versus frequency (ω[rad/s]) of the ethylene/alpha-olefin copolymer is fitted to Power Law of the following Equation 1:
y=c1xc2 [Equation 1]
wherein x means frequency, y means complex viscosity, and c1 refers to a consistency index.

### Claim 6 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein a plateau delta value in a Van Gurp Palmen plot of the ethylene/alpha-olefin copolymer is 0.1 to 1.0 rad,
wherein in the Van Gurp-Palmen plot, the x-axis represents complex modulus (G, dyne/cm2) and the y-axis represents phase angle (d(delta)).

### Claim 7 (depends on 1)

The ethylene/alpha-olefin copolymer of claim 1, wherein the alpha-olefin is at least one selected from the group consisting of 1-propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosene.