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Silicone rubber for cold-shrinkable power cable accessory and preparation method of silicone rubber

A power cable and silicone rubber technology, which is applied in the field of silicone rubber for cold-shrinkable power cable accessories and its preparation, can solve the problems of large mechanical properties of silicone rubber, poor tensile strength, elongation and tear strength, Add additional risks and other issues to achieve the effect of excellent physical and mechanical properties

Inactive Publication Date: 2020-06-30
GUANGDONG POLYSIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the addition of aluminum hydroxide can effectively improve the tracking resistance and corrosion resistance of silicone rubber, aluminum hydroxide is an inorganic powder, which has poor compatibility with silicone rubber and has a great impact on the mechanical properties of silicone rubber. The main indicators-hardness, tensile strength, elongation and tear strength will all deteriorate to varying degrees. Aluminum hydroxide will also increase the density of silicone rubber, making cable products of the same size heavier, which is not conducive to Outdoor application of cable products, adding additional risks

Method used

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  • Silicone rubber for cold-shrinkable power cable accessory and preparation method of silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Each raw material composition is as follows:

[0089] 8 parts of methyl vinyl silicone rubber with a molar mass of 500,000 g / mol and a vinyl content of 3%, 8 parts of methyl vinyl silicone rubber with a molar mass of 650,000 g / mol and a vinyl content of 0.05%. 147 parts of glue, BET method specific area is 200m 2 60 parts of fumed white carbon black per g, 6 parts of hexamethyldisilazane, 3 parts of deionized water, 0.5 part of nano titanium dioxide with a particle diameter of 5 nm, 1 part of nano cerium oxide with a particle diameter of 7 nm, benzene 0.5 parts of phenyl silicone oil with a base molar mass fraction of 41%, 0.3 parts of zinc stearate, 0.2 parts of stearic acid, 0.2 parts of alcohol-modified chloroplatinic acid, 0.2 parts of benzotriazole, 2,5-dimethyl 1 part of 2,5 di-tert-butylperoxyhexane.

[0090] The preparation method of silicone rubber is as follows:

[0091] A. Add all methyl vinyl silicone rubber raw rubber and part of white carbon black in th...

Embodiment 2

[0095] Each raw material composition is as follows:

[0096] 5 parts of methyl vinyl silicone rubber with a molar mass of 450,000 g / mol and a vinyl content of 2%, 5 parts of methyl vinyl silicone rubber with a molar mass of 700,000 g / mol and a vinyl content of 0.16%. 155 parts of glue, the specific area of ​​BET method is 150m 2 50 parts of fumed silica / g, 5 parts of hexamethyldisilazane, 2.5 parts of deionized water, 2 parts of nano titanium dioxide with a particle diameter of 8nm, 2 parts of nano cerium oxide with a particle diameter of 10nm, benzene 1 part of phenyl silicone oil with a base molar mass fraction of 43%, 0.5 part of zinc stearate, 0.3 part of stearic acid, 0.5 part of alcohol-modified chloroplatinic acid, 0.1 part of benzotriazole, 2,5-dimethyl 1.5 parts of base-2,5 di-tert-butylperoxyhexane.

[0097] The preparation method of silicone rubber is the same as that of Example 1.

Embodiment 3

[0099] Each raw material composition is as follows:

[0100] 3 parts of methyl vinyl silicone rubber with a molar mass of 550,000 g / mol and a vinyl content of 4%, 3 parts of methyl vinyl silicone rubber with a molar mass of 600,000 g / mol and a vinyl content of 0.08% 137 parts of glue, BET method specific area is 380m 2 40 parts of fumed silica / g, 4 parts of hexamethyldisilazane, 2 parts of deionized water, 1.5 parts of nano-titanium dioxide with a particle diameter of 10 nm, 0.5 parts of nano-cerium oxide with a particle diameter of 7 nm, benzene 2 parts of phenyl silicone oil with base molar mass fraction of 41%, 0.1 part of zinc stearate, 0.1 part of stearic acid, 0.3 part of alcohol-modified chloroplatinic acid, 0.3 part of benzotriazole, 2,5-dimethyl 0.5 parts of 2,5-di-tert-butylperoxyhexane.

[0101] The preparation method of silicone rubber is the same as that of Example 1.

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Abstract

The invention discloses silicone rubber for a cold-shrinkable type power cable accessory, wherein the silicone rubber comprises the following components in parts by weight: 140 to 160 parts of methylvinyl silicone rubber raw rubber, 40 to 60 parts of white carbon black, 0.5 to 2 parts of nano titanium dioxide, 0.5 to 2 parts of nano cerium oxide, 1 to 2 parts of phenyl silicone oil, 4 to 6 partsof hexamethyldisilazane, 2 to 3 parts of deionized water, 0.2 to 1 part of a mold release agent, 0.1 to 0.5 part of alcohol modified chloroplatinic acid, 0.1 to 0.5 part of benzotriazole, and 0.5-2 parts of 2,5-dimethyl-2,5-di-tert-butyl hexane peroxide. The invention further provides a preparation method of the silicone rubber for the cold-shrinkable type power cable accessory. The silicone rubber for the cold-shrinkable type power cable accessory has excellent physical and mechanical properties, high temperature resistance, tracking resistance and the like.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a silicone rubber for cold-shrinkable power cable accessories and a preparation method thereof. 【Background technique】 [0002] With the development of the economy, people rely more and more on electricity, and have higher and higher requirements on the reliability of power supply. Due to the limitation of production and transportation, the length of high-voltage cables is generally only a few hundred meters per piece, and the lead-out and extension of cables depend on various special power cable accessories. Power cable accessories refer to the intermediate joints and terminal joints of various cables in the cable line, which together with the cables constitute the transmission network. Cable accessories mainly rely on the characteristics of the cable structure, which not only meets and restores the performance of the cable, but also ensures the extension of the cable length ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K13/06C08K9/04C08K3/16C08K7/26C08K3/22C08K5/544C08K5/09C08K5/098C08K5/3475C08K5/14H01B3/46
CPCC08K2003/2213C08K2003/2241C08K2201/011C08L83/04C08L2201/02C08L2201/08C08L2203/202C08L2205/025C08L2205/03H01B3/46C08K13/06C08K9/04C08K3/16C08K7/26C08K3/22C08K5/544C08K5/09C08K5/098C08K5/3475C08K5/14
Inventor 贡玉圭王丰马汉喜
Owner GUANGDONG POLYSIL TECH CO LTD
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