# US 10,121,567 B2 · Insulating composition, insulating article, preparation method and electrical cable accessory thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,121,567 B2
- Document ID: US10121567B2
- Status: Granted
- Kind: B2
- Application number: 14/763,537
- Filed: 2013-02-04
- Published: 2016-01-14
- Granted: 2018-11-06
- Earliest claimed: 2013-02-04
- Applicants: 3M Innovative Properties Company
- Inventors: Ying Shi; Qi Su; Ming Zhang; Meng Zhuang; Yaming Wang; Jingqiang Hou; Xiaolin Jin; Hongsheng Xu
- Web page: https://patentgrep.com/patent/US10121567B2

## CPC

- H01B 3/28: natural or synthetic rubbers
- C08K 3/04: Carbon
- C08K 3/041: {Carbon nanotubes}
- C08K 3/22: of metals
- C08K 5/14: Peroxides
- C08K 7/08: Oxygen-containing compounds
- C08K 9/06: with silicon-containing compounds
- C08K 13/02: Organic and inorganic ingredients
- F16L 3/08: substantially surrounding the pipe, cable or protective tubing
- F16L 59/00: Thermal insulation in general
- H01B 3/46: silicones
- H02G 1/14: for joining or terminating cables
- H02G 15/064: with devices for relieving electrical stress
- C08K 2003/2237: {of titanium}
- H01R 11/11: End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member (H01R11/01 takes precedence)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## 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.

## Claims

### 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

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

### Claim 9 (depends on 1)

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.