Ethylene/alpha-olefin interpolymer based compositions with improved balance of cure and processability

Patent metadata

Field	Value
Publication number	US-12281186-B2
Application number	US-201917773569-A
Country	US
Kind code	B2
Filing date	Dec 26, 2019
Priority date	Dec 26, 2019
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A composition comprising the following components a)-c): a) an alpha composition comprising a multimodal ethylene/alpha-olefin interpolymer, and wherein the alpha composition comprises the following properties: i) an Mz/Mn≥8.0, ii) a density from 0.855 to 0.890 g/cc, iii) a V100 (100° C.)≤2,000 Pa·s, iv) a V1.0 (100° C.)≥15,000 Pa·s, v) a Mn≥16,000 g/mol; b) a peroxide; and c) a silane coupling agent.

First claim

What is claimed is:

1. A composition comprising the following components a)-c):
a) an alpha composition comprising a multimodal ethylene/alpha-olefin interpolymer, and wherein the alpha composition comprises the following properties:
i) an Mz/Mn≥8.0,
ii) a density from 0.855 to 0.890 g/cc,
iii) a V100 (100° C.)≤2,000 Pa·s,
iv) a V1.0 (100° C.)≥15,000 Pa·s,
v) a Mn ≥16,000 g/mol;

b) a peroxide; and
c) a silane coupling agent.

2. The composition of claim 1 , wherein the alpha composition has an I2≥1.0 g/10 min.

3. The composition of claim 1 , wherein the alpha composition has an I2≤30 g/10 min.

4. The composition of claim 1 , wherein the alpha composition has an I10/I2≥6.0.

5. The composition of any one of the previous claim 1 , wherein the alpha composition has an I10/I2≤40.0.

6. The composition of any one of the previous claim 1 , wherein, the alpha composition has a molecular weight distribution MWD≥3.00.

7. The composition of claim 1 , wherein, for the multimodal interpolymer, a [Mn (highest 20% mass fraction) /Mn (lowest 20% mass fraction)]≥ 16.0.

8. The composition of claim 1 , wherein, for the multimodal interpolymer, a [Mn (highest 20% mass fraction) /Mn (lowest 20% mass fraction]≤ 100.0.

9. The composition of claim 1 , wherein the multimodal ethylene/alpha-olefin interpolymer comprises a first ethylene/alpha-olefin interpolymer fraction and a second ethylene/alpha-olefin interpolymer fraction, and wherein the first ethylene/alpha-olefin interpolymer fraction differs from the second ethylene/alpha-olefin interpolymer fraction in one or more properties selected from comonomer content, I2, I10/I2, Mn, Mw, Mz, MWD, or any combination thereof.

10. The composition of claim 9 , wherein the first ethylene/alpha-olefin interpolymer fraction is a first ethylene/alpha-olefin copolymer, and wherein the second ethylene/alpha-olefin interpolymer fraction is a second ethylene/alpha-olefin copolymer.

11. The composition of claim 1 , wherein the composition comprises ≥50.0 wt % of the alpha composition, based on a weight of the composition.

12. The composition of claim 1 , wherein the alpha composition further comprises a unimodal ethylene/alpha-olefin interpolymer that has a MWD from 1.80 to 2.50, and a density from 0.860 to 0.890 g/cc.

13. The composition of claim 1 , wherein a weight ratio of the peroxide to the silane coupling agent is from 0.5 to 7.0.

14. The composition of claim 1 , wherein the composition further comprises a crosslinking coagent.

15. The composition of claim 14 , wherein a weight ratio of the peroxide to the coagent is from 0.5 to 3.0.

16. A crosslinked composition formed from the composition of claim 1 .

17. An article comprising at least one component formed from the composition of claim 1 .

18. The article of claim 17 , wherein the article is a film.

19. The article of claim 17 , wherein the article is a solar cell module.

20. A process of forming a solar cell module, said process comprising laminating an array of solar cells between two film layers, and wherein each film layer is, independently, formed from the composition of claim 1 .

Assignees

• Dow Global Technologies Llc

Inventors

• Wu Gaoxiang
• Habersberger Brian M
• Yang Hong
• Delorbe Johnathan E
• Karjala Jr Thomas Wesley

Classifications

• C08K5/54

  Silicon-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• C08K5/14

  Peroxides · CPC title

• C08L23/06

  Polyethylene · CPC title

• C08L23/0807

  with unsaturated hydrocarbons only containing four or more carbon atoms · CPC title

• C08L23/0815 Primary

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title