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Liquid silicon rubber sizing, liquid silicon rubber material and their preparation method

A technology of liquid silicone rubber and basic rubber, which is applied in the field of rubber insulation materials, can solve the problems of reduced strength and increased elastic modulus of silicone rubber, and achieve the effects of high tensile strength, high elongation, and good leakage resistance

Active Publication Date: 2006-02-08
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the electrical insulation of silicone rubber, a large amount of aluminum hydroxide is usually added, which in turn increases the elastic modulus and reduces the strength of silicone rubber.

Method used

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  • Liquid silicon rubber sizing, liquid silicon rubber material and their preparation method
  • Liquid silicon rubber sizing, liquid silicon rubber material and their preparation method
  • Liquid silicon rubber sizing, liquid silicon rubber material and their preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 100 parts by mass of α, ω-vinyl dimethyl polydimethylsiloxane (viscosity at 25°C is 15000mPa·s) into the vacuum kneader, add 60 parts by mass of fumed silica, 10 parts by mass For hexamethyldisilazane, stir the material at room temperature 25°C for 1 hour, raise the temperature to 150°C, heat and knead for 2 hours, vacuum it for 1 hour, then add 40 parts by mass of α,ω-vinyl Dimethylpolydimethylsiloxane, 40 parts by mass of aluminum hydroxide as a non-reinforcing filler, and 60 parts by mass of silicone resin are uniformly mixed, ground and filtered by a three-roll machine. Finally, the liquid silicone rubber base compound is obtained.

[0046] In 100 parts by mass of the liquid silicone rubber base compound, 0.1 part by mass of 1% chloroplatinic acid isopropanol solution, stirred evenly, degassed, and filtered; component (A) was obtained.

[0047] In 100 parts by mass of liquid silicone rubber base compound, add 2.0 parts by mass of polymethyl hydrogen siloxane (b...

Embodiment 2

[0052] Add 100 parts of α, ω-vinyl dimethyl polydimethylsiloxane (viscosity at 25°C is 30000mPa.s) into the vacuum kneader, then add 50 parts of fumed silica (specific surface area 200 2 / g) 16 parts of hexamethyldisilazane and 4 parts of dimethyldimethoxysilane. Stir the material at room temperature for 1 hour, raise the temperature to 170°C, heat and knead for 2 hours, and then remove it under vacuum for 2 hours, then add 20 parts of α, ω-vinyl dimethyl polydimethylsiloxane, 60 Parts of silicone resin and silicone oil solution, mixed evenly, ground and filtered by a three-roll machine. Finally, the liquid silicone rubber base compound is obtained.

[0053] In the above 100 parts of liquid silicone rubber base material, 0.05 part of 1% isopropanol solution of chloroplatinic acid is used to make component (A); then add another 100 parts of liquid silicone rubber base material into polymethyl hydrogen silicon 3.5 parts of oxane (b) and 0.05 part of methyl acetylene alcohol in...

Embodiment 3

[0057] Add 100 parts of α, ω-propenyl dimethylpolymethylphenylsiloxane (viscosity at 25°C is 20000mPa.s) into the vacuum kneader, then add 70 parts of fumed silica (specific surface area 150m 2 / g), 16 parts of hexamethyldisilazane and 4 parts of low molecular weight hydroxy silicone oil. Stir the material at room temperature for 2 hours, raise the temperature to 140° C., heat and knead for 2 hours, and remove it under vacuum for 2 hours, then add 20 parts of α, ω-vinyl dimethyl polydimethylsiloxane ( Viscosity at 25°C is 2000mPa.s), 2 parts of α,ω-vinyl dimethyl polyvinylmethylsiloxane (viscosity at 25°C is 1000mPa.s, vinyl molar content is 2% ), 40 parts of silicone resin and silicone oil solution, and 20 parts of superfine quartz powder (3 μm), mix well, grind and filter through a three-roller machine. Finally, the liquid silicone rubber base compound is obtained.

[0058] In the above 100 parts of base rubber, add 3 parts of polymethylhydrogensiloxane (b), 0.1 part of 1%...

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Abstract

The invention discloses a liquid silicon rubber base glue stock comprising 100 weight parts of HO[(CH3)2SiO]nH, 30-70 weight parts of reinforcement filling material, and 1-20 weight parts of structured control agent. The invention also discloses the process for preparing the liquid silicon rubber base glue stock, liquid silicon rubber material containing the liquid silicon rubber base glue stock and its preparing process, wherein the material comprises component (A) and component (B) by the mass ratio of 1:1, wherein the component (A) comprises 100 weight parts of liquid silicon rubber base glue stock, 0.05-0.5 weight parts of addition reaction catalyst, and the component (B) comprises 100 mass parts of liquid silicon rubber base glue stock, 2-10 weight parts of cross linking agent, 0.04-0.5 weight parts of addition reaction depressant and 0.03-0.5 wt% of pigment.

Description

technical field [0001] The invention belongs to the technical field of rubber insulating materials used for high-voltage electrical insulators, bushings and power cable accessories, and specifically relates to a liquid silicone rubber base rubber material and a preparation method thereof. The invention also relates to a liquid silicone rubber base rubber material containing the above-mentioned liquid silicone rubber base rubber material Composition of liquid silicone rubber materials and methods for their preparation. Background technique [0002] A large number of transformers, transformers, and insulators are used in the construction of the power grid to ensure the safe transmission of electrical energy, and these electrical equipment work outdoors and must withstand wind, rain, and long-term exposure. In industrial pollution areas, there are corrosion and pollution problems of acids, alkalis, salts and other substances. This requires that the external insulation of power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/14C08K5/54
Inventor 张利萍
Owner GUANGZHOU TINCI MATERIALS TECH
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