Polyolefin compositions having improved electrical properties

Patent metadata

Field	Value
Publication number	US-12384904-B2
Application number	US-202017638510-A
Country	US
Kind code	B2
Filing date	Aug 26, 2020
Priority date	Aug 30, 2019
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

The present disclosure relates to a curable composition comprising: (A) a polyolefin; (B) a fumed alumina; (C) a silane compound; (D) a UV stabilizer; and, optionally, (E) a crosslinking agent, where the curable composition demonstrates improved electrical properties. The present disclosure further relates to a crosslinked polymer composition that is the reaction product of the curable composition, where improved electrical properties are demonstrated as well.

First claim

What is claimed is:

1. A curable composition, comprising, based on the total weight of the curable composition:
from 95 wt % to 99.97 wt % of an ethylene/alpha-olefin/diene interpolymer comprising of from 55 to 70 wt % of polymerized ethylene and from 0.5 wt % to 8.5 wt % of polymerized diene, based on the based on the weight of the interpolymer, and having a Mooney viscosity (ML 1+4 at 125° C.) from 18 MU to 40 MU, in accordance with ASTM D1646 and a molecular weight distribution (MWD or Mw/Mn) from 2 to 4;
from 0.5 wt % to 1.0 wt % of a fumed alumina;
from 0.1 wt % to 2.0 wt % of a silane compound selected from the group consisting of: vinyl-trimethoxysilane, 3-(trimethoxysilyl) propylmethacrylate, and allyltrimethoxysilane;
from 0.01 wt % to 1.0 wt % of a hindered amine UV stabilizer; and
from 1.0 wt % to 3.0 wt % of a crosslinking agent;
wherein the ethylene/alpha-olefin/diene interpolymer comprises a Group 4 metal in an amount of 0.3 ppm or greater.

2. The curable composition of claim 1 , wherein the ethylene/alpha-olefin/diene interpolymer comprises vanadium in an amount of 0.4 ppm or less.

3. The curable composition of claim 1 , wherein the curable composition has a volume resistivity of greater than 5.0E+15 ohm.cm.

4. A crosslinked polymer composition comprising the reaction product of the curable composition of claim 1 .

5. The crosslinked polymer composition of claim 4 , wherein the crosslinked polymer composition has a volume resistivity of greater than 5.0E+15 ohm.cm.

6. The crosslinked polymer composition of claim 4 , wherein the crosslinked polymer composition has a dissipation factor of less than 2%.

7. An article comprising the crosslinked polymer composition of claim 4 .

8. The article of claim 7 , wherein the article has a volume resistivity of greater than 5.0E+15 ohm.cm.

9. The article of claim 7 , wherein the article has a dissipation factor of less than 2%.

Assignees

• Dow Global Technologies Llc

Inventors

• Yang Yunfeng
• Wu Xiaosong
• Tuberquia Juan C
• Chen Yong
• Xu Xianmin
• Han Tao

Classifications

• C08K5/3435

  Piperidines · CPC title

• C08K2003/2227

  of aluminium · CPC title

• C08K3/22 Primary

  of metals · CPC title

• C08K7/24

  inorganic · CPC title

• C08K5/5425

  containing at least one C=C bond · CPC title