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Silicone rubber having high resistance to electric erosion and used for insulator, and preparation method thereof

A technology for electrical erosion and insulators, which is applied in the field of high electrical corrosion resistance silicone rubber for insulators and its preparation, can solve the problem of electrical erosion of silicone rubber on the surface of insulators, which cannot have both flame retardancy, tracking resistance and resistance Electrocorrosion and other problems to achieve the effect of improving service life and operating safety, ensuring long-term normal operation, and high flame retardancy

Inactive Publication Date: 2014-11-05
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone rubber for insulators requires that the silicone rubber has good electrical and mechanical properties; at the same time, long-term electrification will cause electrical corrosion to the silicone rubber on the surface of the insulator
In recent years, with the gradual increase of the voltage level, the electrical corrosion damage to silicone rubber has also increased accordingly. However, the silicone rubber currently on the market can only meet the mechanical properties, water repellency and weather resistance required by the silicone rubber standard for insulators, and cannot have both Good flame retardancy, tracking resistance and electrical erosion resistance

Method used

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  • Silicone rubber having high resistance to electric erosion and used for insulator, and preparation method thereof
  • Silicone rubber having high resistance to electric erosion and used for insulator, and preparation method thereof
  • Silicone rubber having high resistance to electric erosion and used for insulator, and preparation method thereof

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Effect test

Embodiment 1

[0028] The insulator of this embodiment is made of high electrical corrosion resistance silicone rubber, which is composed of the following raw materials in parts by weight:

[0029]

[0030] Among them: the molecular weight of methyl vinyl silicone rubber A is 550,000, and the molar fraction of vinyl is 0.10%; the molecular weight of methyl vinyl silicone rubber B is 650,000, and the molar fraction of vinyl is 1.00%; terminal, the branched chain contains vinyl, and the vinyl mole fraction is 6%.

[0031] Among the raw materials of the insulators of this embodiment with high electrical corrosion resistance silicone rubber, the specific surface area of ​​fumed silica is 150m 2 / g; the particle size of aluminum hydroxide is D50 1 μm; the particle size of zinc borate is D50 ≤ 10 μm; the particle size of aluminum oxide is D50 ≤ 10 μm; the particle size of zinc oxide is D50 ≤ 10 μm, and the purity is ≥ 99%; The particle size of tetrafluoroethylene powder is D50≤10μm; the hydrog...

Embodiment 2

[0039] The insulator of this embodiment is made of high electrical corrosion resistance silicone rubber, which is composed of the following raw materials in parts by weight:

[0040]

[0041]

[0042] Among them: the molecular weight of methyl vinyl silicone rubber A is 600,000, and the molar fraction of vinyl is 0.06%; the molecular weight of methyl vinyl silicone rubber B is 700,000, and the molar fraction of vinyl is 0.95%; terminal, the branched chain contains vinyl, and the vinyl mole fraction is 9%.

[0043] Among the raw materials of the insulators of this embodiment with high electrical corrosion resistance silicone rubber, the specific surface area of ​​fumed silica is 300m 2 / g; the particle size of aluminum hydroxide is D50 1 μm; the particle size of zinc borate is D50 ≤ 10 μm; the particle size of aluminum oxide is D50 ≤ 10 μm; the particle size of zinc oxide is D50 ≤ 10 μm, and the purity is ≥ 99%; The particle size of tetrafluoroethylene powder is D50≤10μm; ...

Embodiment 3

[0051] The insulator of this embodiment is made of high electrical corrosion resistance silicone rubber, which is composed of the following raw materials in parts by weight:

[0052]

[0053] Among them: the molecular weight of methyl vinyl silicone rubber A is 650,000, and the molar fraction of vinyl is 0.15%; the molecular weight of methyl vinyl silicone rubber B is 600,000, and the molar fraction of vinyl is 0.90%; terminal, the branched chain contains vinyl, and the vinyl mole fraction is 12%.

[0054] Among the raw materials of the insulators of this embodiment with high electrical corrosion resistance silicone rubber, the specific surface area of ​​fumed silica is 200m 2 / g; the particle size of aluminum hydroxide is D50 1 μm; the particle size of zinc borate is D50 ≤ 10 μm; the particle size of aluminum oxide is D50 ≤ 10 μm; the particle size of zinc oxide is D50 ≤ 10 μm, and the purity is ≥ 99%; The particle size of tetrafluoroethylene powder is D50≤10μm; the hydro...

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Abstract

The invention discloses a silicone rubber having high resistance to electric erosion and used for an insulator and a preparation method thereof. The silicone rubber comprises the following raw materials: methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, fumed silica, aluminum hydroxide, zinc borate, aluminum oxide, a silane coupling agent, a structure control agent, hydrogen-containing silicone oil, vinyl silicone oil, zinc oxide, stearic acid, stearate, triethanolamine, tetrafluoroethene powder, an ultraviolet ray absorber, color masterbatch and a vulcanizing agent. The invention also provides the preparation method for the silicone rubber having high resistance to electric erosion and used for the insulator. The silicone rubber provided by the invention has high flame resistance and high resistance to tracking and electric erosion while meeting standard requirements for mechanical properties, hydrophobicity and weatherability of silicone rubber used for insulators; and the silicone rubber can guarantee long-term normal working of a composite insulator and improve the service life and operation safety of the composite insulator. The preparation method is simple, has low cost and is suitable for large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of high-voltage insulating materials, and in particular relates to a high-electric-corrosion-resistant silicone rubber for insulators and a preparation method thereof. Background technique [0002] At present, insulators play an important role in power transmission and transformation equipment. Composite insulator is a kind of insulator developed in recent decades. Because of its light weight, small size, high strength, pollution resistance, simple manufacturing process, and easy maintenance, it has certain advantages over porcelain insulators and glass insulators. In China, after more than 20 years of development, composite insulators have been widely used. The composite insulator is composed of glass fiber reinforced resin mandrel, silicone rubber shed, upper and lower flanges, etc. The shed is wrapped outside the mandrel, which plays a combined role of bearing the external high electric field and the har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/06C08K9/06C08K3/36C08K3/22C08K3/38C08K5/098C08K5/14
Inventor 种芝艺王祖力赵鸿飞韩国辉田刚领龚浩陈晓丽王茂玉宋晓光史鸿威陈延辉
Owner STATE GRID CORP OF CHINA
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