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High -performance leak -resistant, upstrate, formation liquid silicon rubber composition and preparation method

A liquid silicone rubber and tracking technology, which is applied in the field of silicone rubber high-voltage insulating materials, can solve the problem of reducing the mechanical properties of addition-type liquid silicone rubber, damaging the hydrophobic and anti-fouling properties of addition-type liquid silicone rubber, and inorganic tracking-resistant agents Polarity and other problems, to achieve the effect of improving tracking resistance, small electrical corrosion loss, and improving hydrophobic performance

Active Publication Date: 2019-10-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to achieve good anti-tracking performance, it is necessary to add a large amount of inorganic anti-tracking agent to silicone rubber, which will greatly reduce the mechanical properties of addition-type liquid silicone rubber.
In addition, due to the high polarity of the inorganic anti-tracking agent, it will damage the hydrophobic and antifouling properties of the addition-type liquid silicone rubber to a certain extent.

Method used

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  • High -performance leak -resistant, upstrate, formation liquid silicon rubber composition and preparation method
  • High -performance leak -resistant, upstrate, formation liquid silicon rubber composition and preparation method
  • High -performance leak -resistant, upstrate, formation liquid silicon rubber composition and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A mixed solution of 30 g of ethanol, 0.4 g of hydrochloric acid and 5.8 g of deionized water was added to a 150 mL four-neck flask equipped with a reflux device, a mechanical stirrer and a constant pressure dropping funnel, and 1.5 g of tridecafluorooctyl Alkyltriethoxysilane, 3.8g of vinyltriethoxysilane and 24.0g of phenyltriethoxysilane were dissolved in 20g of ethanol solvent, and added dropwise into a four-necked flask. Under the condition of mechanical stirring, the temperature was raised to 70°C for 3 hours, and then the temperature was raised to 120°C for 24 hours. Finally, ethanol was distilled off under reduced pressure to obtain fluorine-containing organic-inorganic hybrid low-melting glass 1 (FOILMG1)

[0037] 100 parts by mass of vinyl silicone oil (viscosity at 25°C is 25200mPa·s, vinyl content is 0.25mol%), 40 parts by mass of fumed silica (specific surface area is 260m 3 / g), 6.8 parts by mass of hexamethyldisilazane were mixed in a vacuum kneader, knead...

Embodiment 2

[0040] A mixed solution of 26g of ethanol, 0.3g of hydrochloric acid and 5.4g of deionized water was added to a 150mL four-neck flask equipped with a reflux device, a mechanical stirrer and a constant pressure dropping funnel, and 2.9g of tridecafluorooctyl Alkyltriethoxysilane, 2.1 g of vinyltriethoxysilane and 14.0 g of phenyltriethoxysilane were dissolved in 20 g of ethanol solvent, and added dropwise into a four-necked flask. Under the condition of mechanical stirring, the temperature was raised to 50° C. for 3 hours, and then the temperature was raised to 150° C. for 24 hours. Finally, ethanol was distilled off under reduced pressure to obtain fluorine-containing organic-inorganic hybrid low-melting glass 2 (FOILMG2).

[0041] 100 parts by mass of vinyl silicone oil (viscosity at 25°C is 25200mPa·s, vinyl content is 0.25mol%), 40 parts by mass of fumed silica (specific surface area is 260m 3 / g), 6.8 parts by mass of hexamethyldisilazane were mixed in a vacuum kneader, kn...

Embodiment 3

[0046] 100 parts by mass of vinyl silicone oil (viscosity at 25°C is 25200mPa·s, vinyl content is 0.25mol%), 40 parts by mass of fumed silica (specific surface area is 260m 3 / g), 6.8 parts by mass of hexamethyldisilazane were mixed in a vacuum kneader, kneaded at 30°C for 4h, heated to a material temperature of 170°C and continued to knead for 1h, then vacuumized and kneaded for 2h, cooled and passed Grinding on a three-roll machine to obtain the addition-type liquid silicone rubber base material.

[0047] In the above-mentioned 100 parts by mass of base rubber, add 2 parts by mass of FOILMG2, 3 parts by mass of ureido vinyl MQ silicone resin (U-MQ), 1.82 parts by mass of hydrogen-containing silicone oil (hydrogen content is 0.75wt%), 0.03 Mass parts of 1-ethynyl-1-cyclohexanol and 0.25 mass parts of divinyltetramethyldisiloxane complex of chloroplatinic acid (platinum content is 3000ppm), stirred evenly at 30°C, at 120°C The lower mold was pressed for 10 minutes to make a 6...

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Abstract

The invention discloses a high-performance anti-tracking addition type liquid silicon rubber composition and a preparation method thereof. The composition is composed of, by mass, 100 parts of vinyl silicon oil, 40 parts of white carbon black, 6.8 parts of hexamethyldisilazane, 1.0-2.5 parts of hydrogen-containing silicon oil, 2-5 parts of fluorine-containing organic-inorganic hybrid low-melting-point glass, 1-3 parts of carbamido-containing vinyl MQ silicon rubber, 5-40ppm of platinum catalyst and 0.03 part of 1-acetenyl-1-cyclohexano. Addition type liquid silicon rubber has excellent anti-tracking performance, hydrophobic performance and mechanical performance and has quite wide application prospect in the field of high-voltage ultrahigh-voltage power transmission and transformation and electronics.

Description

technical field [0001] The invention relates to the field of silicone rubber high-voltage insulating materials, in particular to a high-performance tracking-resistant additive liquid silicone rubber composition and a preparation method thereof. Background technique [0002] In the fields of high-voltage and ultra-high-voltage electrical insulation, insulating materials have gradually replaced traditional insulating materials such as ceramics and glass due to their excellent high and low temperature resistance, hydrophobicity and hydrophobicity migration. However, with the aggravation of environmental pollution and the continuous improvement of voltage levels, silicone rubber insulating materials will be damaged by tracking and tracking under long-term operating conditions. The so-called tracking damage refers to: the silicone rubber insulating material deposits more and more dirt, moisture and salt mist on the surface during long-term use, accompanied by a small amount of lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/08C08K13/02C08K3/36C08K3/40C08K5/5445
Inventor 曾幸荣李燕萍刘凤娇张亚军赖学军李红强
Owner SOUTH CHINA UNIV OF TECH
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