Ethylene-based polymer composition with branching and process for producing the same

Patent metadata

Field	Value
Publication number	US-12503579-B2
Application number	US-202017779765-A
Country	US
Kind code	B2
Filing date	Nov 11, 2020
Priority date	Nov 26, 2019
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

The present disclosure provides a composition. In an embodiment, the composition is an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The composition includes ethylene monomer and a mixture of hydrocarbon-based molecules. Each hydrocarbon-based molecule includes three or more internal alkene groups.

First claim

The invention claimed is:

1 . An ethylene-based polymer composition comprising:
in polymerized form, based on the total weight of the ethylene-based polymer composition (i) from 95 wt % to 99.98 wt % ethylene monomer, and (ii) from 5.0 wt % to 0.02 wt % of a mixture of hydrocarbon-based molecules, each hydrocarbon-based molecule having three or more internal alkene groups, and each hydrocarbon-based molecule has the Structure I:

wherein m>n and m is from 3 to 90.

2 . The ethylene-based polymer composition of claim 1 , wherein the mixture of hydrocarbon-based molecules based on Structure I has a molecular weight distribution from 1.2 to 10.

3 . The ethylene-based polymer composition of claim 1 , wherein the hydrocarbon-based molecules have the Structure II:

wherein m>n and m is from 3 to 90; n is from 0 to 60; x is from 0 to 90, and y is from 0 to 90.

4 . The ethylene-based polymer composition of claim 3 , wherein the mixture of hydrocarbon-based molecules based on Structure II has a molecular weight distribution from 1.2 to 10.

5 . The ethylene-based polymer composition of claim 1 , wherein the ethylene-based polymer composition has a terminal alkene content from 0.05/1000 carbons to 0.2/1000 carbons.

6 . The ethylene-based polymer composition of claim 1 , wherein the ethylene-based polymer composition has an internal trans-alkene content from 0.1/1000 carbons to 2/1000 carbons.

7 . The ethylene-based polymer composition of claim 1 , wherein the ethylene-based polymer composition has a density from 0.909 g/cc to 0.940 g/cc.

8 . The ethylene-based polymer composition of claim 1 , further comprising a blend component, wherein the blend component does not include the mixture of hydrocarbon-based molecules.

9 . An article comprising the composition of claim 1 .

10 . The article of claim 9 , wherein the article is selected from the group consisting of a film, a coating, a coating for a cable, a coating for a wire, and a coated sheet.

11 . The ethylene-based polymer composition of claim 1 , wherein m is from 15 to 60 and n is from 0.5 to 5.

12 . A process comprising:
reacting, in a polymerization reactor under free-radical polymerization conditions and at a pressure greater than or equal to 100 MPa, ethylene monomer and a mixture of hydrocarbon-based molecules, each hydrocarbon-based molecule having the Structure I:

wherein m>n and m is from 3 to 90; and
forming an ethylene-based polymer composition comprising in polymerized form, based on the total weight of the ethylene-based polymer composition
(i) from 95 wt % to 99.98 wt % ethylene monomer, and
(ii) from 5.0 wt % to 0.02 wt % of the hydrocarbon-based molecule of Structure I.

13 . The process of claim 12 , wherein the polymerization takes place in a reactor configuration comprising at least one tubular reactor.

14 . The process of claim 12 , wherein the polymerization takes place in a reactor configuration comprising at least one autoclave reactor.

15 . The process of claim 12 wherein m is from 15 to 60 and n is from 0.5 to 5.

Assignees

• Dow Global Technologies Llc

Inventors

• Krasovskiy Arkady L
• Konstantinov Ivan A
• Munjal Sarat
• Ewart Sean W

Classifications

• C08L2207/066

  LDPE (radical process) · CPC title

• C08L2203/202

  use in electrical wires or wirecoating · CPC title

• C08L2203/16

  used for films · CPC title

• C08F236/22

  the radical having three or more carbon-to-carbon double bonds · CPC title

• C08F236/06

  Butadiene · CPC title