Long-chain branched ethylene-based polymers

Patent metadata

Field	Value
Publication number	US-11976146-B2
Application number	US-202117907467-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Mar 27, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

Embodiments of this disclosure are directed to ethylene-based polymers. The ethylene-based polymer are polymerized units derived from ethylene, diene, and optionally, one or more C3-C12 α-olefins. The ethylene-based polymer includes a melt viscosity ratio (V0.1/V100) at 190 C greater than 20. The V0.1 is the viscosity of the ethylene-based polymer at 190 C at a frequency of 0.1 radians/second, and the V100 is the viscosity of the ethylene-based polymer at 190 C at a frequency of 100 radians/second. Additionally, the ethylene-based polymer includes an average g greater than 0.86, where the average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.

First claim

The invention claimed is:

1. An ethylene-based polymer comprising polymerized units derived from ethylene, diene, and one or more C 3 -C 12 α-olefins, wherein the ethylene-based polymer comprises:
a melt viscosity ratio (V 0.1 /V 100 ) at 190° C. greater than 20, where V 0.1 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 0.1 radians/second, and V 100 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 100 radians/second; and
an average g′ greater than 0.860, where the average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.

2. An ethylene-based polymer comprising polymerized units derived from ethylene, diene, and optionally one or more C 3 -C 12 α-olefins, wherein the ethylene-based polymer comprises:
a melt strength greater than 10 cN (190° C., 2.4 mm/s 2 , 120 mm from die exit to center of wheels, extrusion rate of 38.2 s −1 , capillary die of 30 mm length, 2 mm diameter and 180° entrance angle); and
an average g′ greater than 0.860, where the average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.

3. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer has a melt strength of greater than 10 cN (190° C., 2.4 mm/s 2 , 120 mm from the die exit to the center of the wheels, extrusion rate of 38.2 s −1 , capillary die of 30 mm length, 2 mm diameter and 180° entrance angle).

4. The ethylene-based polymer of claim 2 , wherein the ethylene-based polymer has a melt viscosity ratio (V 0.1 /V 100 ) at 190° C. is greater than 20, where V 0.1 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 0.1 radians/second, and V 100 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 100 radians/second.

5. The ethylene-based polymer of claim 1 , wherein the diene is unconjugated and acyclic.

6. The ethylene-based polymer of claim 5 , wherein the diene is selected from the group consisting of 1,4-pentadiene, 1,5-hexadiene, 1,6-heptadiene, 1,7-octadiene, 1,8-nonadiene, 1,9-decadiene, 1,10-undecadiene, 1,11-dodecadiene, dimethyldivinylsilane, dimethyldiallylsilane, and dimethylallylvinylsilane.

7. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer comprises a low molecular weight polymer fraction and a high molecular weight polymer fraction, wherein the low molecular weight polymer fraction and the high molecular weight polymer fraction each comprise polymerized units derived from ethylene, diene, and one or more C 3 -C 12 α-olefins.

8. The ethylene-based polymer of claim 7 , wherein the second molecular weight polymer fraction comprises 0.5 to 30% by weight of the polymer.

9. The ethylene-based polymer of claim 8 , wherein the second molecular weight polymer fraction comprises between 1 and 15% by weight of the polymer.

10. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer has a MI greater than 0.1, wherein MI is melt index in g/10 min according to ASTM D1238.

11. The ethylene-based polymer of claim 10 , wherein the MI is greater than 1.

12. The ethylene-based polymer of claim 2 , wherein the ethylene-based polymer has a MI greater than 1.

13. The ethylene-based polymer of claim 1 , wherein the average g′ is greater than 0.88.

14. The ethylene-based polymer of claim 13 , wherein the average g′ is greater than 0.90.

15. The ethylene-based polymer of claim 3 , wherein the melt strength is greater than 20 cN (190° C., 2.4 mm/s 2 , 120 mm from die exit to center of wheels, extrusion rate of 38.2 s −1 , capillary die of 30 mm length, 2 mm diameter and 180° entrance angle).

16. The ethylene-based polymer of claim 2 , wherein the melt strength is greater than 30 cN (190° C., 2.4 mm/s 2 , 120 mm from die exit to center of wheels, extrusion rate of 38.2 s −1 , capillary die of 30 mm length, 2 mm diameter and 180° entrance angle).

17. The ethylene-based polymer of claim 4 , wherein the melt viscosity ratio (V 0.1 /V 100 ) at 190° C. is greater than 25, where V 0.1 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 0.1 radians/second, and V 100 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 100 radians/second.

18. The ethylene-based polymer of claim 13 , wherein the melt viscosity ratio (V 0.1 /V 100 ) at 190° C. is greater than 30, where V 0.1 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 0.1 radians/second, and V 100 is viscosity of the ethylene-based polymer at 190° C. at a frequency of 100 radians/second.

19. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer has a weight averaged molecular weight (M w ) of less than or equal to 250,000 Daltons, as determined by absolute gel permeation chromatography.

Assignees

• Dow Global Technologies Llc

Inventors

• Froese Robert D J
• Lu Keran
• Sammler Robert L
• Den Doelder Cornelis F J

Classifications

• C08F210/18 Primary

  with non-conjugated dienes, e.g. EPT rubbers · CPC title

• C08F210/02

  Ethene · CPC title

• C08F210/14

  Monomers containing five or more carbon atoms · CPC title

• C08F230/08

  containing silicon · CPC title

• C08F236/20

  unconjugated · CPC title