Insulating composition, insulating article, preparation method and electrical cable accessory thereof

Patent metadata

Field	Value
Publication number	US-10121567-B2
Application number	US-201314763537-A
Country	US
Kind code	B2
Filing date	Feb 4, 2013
Priority date	Feb 4, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

An insulating composition comprises: about 70-100 parts by volume of a polymeric material, about 5-30 parts by volume of a ceramic filler (2) which is surface-treated by a bifunctional coupling agent in an amount of about 0.1 wt % to about 4 wt % of the ceramic filler; about 0.1-5 parts by volume of a crosslinking agent; about 0-6 parts by volume of conductive powder (3); and about 0-6 parts by volume of ZnO whisker (4). A preparation method for making the insulating composition, an insulating article such as an electrical cable accessory, and a use thereof are provided.

First claim

We claim:

1. An insulating composition, comprising:
about 70-100 parts by volume of a polymeric material;
about 5-30 parts by volume of a ceramic filler which is surface-treated by a bifunctional coupling agent in an amount of about 0.1 wt % to about 4 wt % of the ceramic filler;
about 0.1-5 parts by volume of a crosslinking agent;
about 0-6 parts by volume of conductive carbon powder; and
about 0.2-6 parts by volume of ZnO whisker, wherein the ZnO whisker has a cross-shaped prong morphology and is semi-conductive.

2. The composition of claim 1 , wherein the ceramic filler is one or more selected from titanates, oxides, borides, carbides, silicates, hydroxides, nitrides, perovskites, phosphides, sulfides, silicides and combinations thereof.

3. The composition of claim 1 , wherein the bifunctional coupling agent is at least one selected from silane coupling agents having two hydrolysable functional groups.

4. The composition of claim 1 , wherein the ceramic filler is surface-treated by the bifunctional coupling agent in an amount of about 0.2 wt % to about 2 wt % of the ceramic filler.

5. The composition of claim 1 , wherein the polymeric material is one or more selected from rubbers and elastomers.

6. The composition of claim 1 , wherein the polymeric material is one or more selected from solid or liquid silicones, and hydrocarbon rubbers.

7. The composition of claim 1 , wherein based on about 70-100 parts by volume of the polymeric material, the crosslinking agent is used in an amount of about 0.4-1.2 parts by volume.

8. The composition of claim 1 , wherein the crosslinking agent is one or more selected from organic peroxide vulcanizing agents and metal-based crosslinking agents.

9. The composition of claim 1 , wherein the conductive carbon powder is affixed on the surface of the ceramic filler which is surface-treated by a bifunctional coupling agent.

Assignees

• 3M Innovative Properties Co

Inventors

• Shi Ying
• Su Qi
• Zhang Ming
• Zhuang meng
• Wang Yaming
• Hou Jingqiang
• Jin Xiaolin
• Xu Hongsheng

Classifications

• F16L3/08

  substantially surrounding the pipe, cable or protective tubing · CPC title

• H02G15/064

  with devices for relieving electrical stress · CPC title

• C08K9/06

  with silicon-containing compounds · CPC title

• C08K13/02

  Organic and inorganic ingredients · CPC title

• H01B3/28 Primary

  natural or synthetic rubbers · CPC title