Base rubber material of high dielectric constant liquid silicone rubber and application thereof in composition

A technology of liquid silicone rubber and high dielectric constant, which is applied in the field of electrical insulation materials. It can solve the problems of non-environmental protection, strong smell, and inconvenient automatic production, and achieve the effects of less material loss, high efficiency, and fast curing and molding speed.

Inactive Publication Date: 2014-10-01
GUANGZHOU TINCI SILICONE TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN201110351670.4 adopts silicone rubber raw rubber as the base material, and cooperates with giant dielectric constant ceramic powder, conductive or semiconductive powder, reinforcing filler, compounding agent, and peroxide initiator to make a kind of high dielectric constant silicon Rubber material, which can optimize the distribution of the electric field and alleviate the concentration of the electric field at the high-voltage part; but this method uses a peroxide initiator to cure at high temperature, which is not convenient for automatic production and has a strong odor during processing and production, which is not environmentally friendly

Method used

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  • Base rubber material of high dielectric constant liquid silicone rubber and application thereof in composition
  • Base rubber material of high dielectric constant liquid silicone rubber and application thereof in composition
  • Base rubber material of high dielectric constant liquid silicone rubber and application thereof in composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 40 parts by mass of barium titanate (average particle size 20 microns) and 4 parts by mass of vinyltriethoxysilane into a vacuum kneader, stir and mix for 3.0 hours, then add 100 parts by mass of α,ω-divinyl polydimethyl Base siloxane (viscosity at 25°C is 100000mPa·s), add 20 parts by mass of fumed silica (specific surface area is 150m2 / g), 10 parts by mass of hexamethyldisilazane, put the material at room temperature Stir for 2.0 hours, heat up to material temperature of 140°C, heat and knead for 2.0 hours, and vacuum for 4 hours, then add 50 parts by mass of the above-mentioned α,ω-divinyl polydimethylsiloxane, 20 parts by mass of silicon Resin (e), mixed uniformly, ground and filtered by a three-roll machine. Finally, the liquid silicone rubber base compound is obtained.

[0048] Add 0.05 parts by mass of 1% isopropanol solution of chloroplatinic acid to 100 parts by mass of the liquid silicone rubber base compound, stir evenly, remove air bubbles, and filter t...

Embodiment 2

[0058] Add 35 parts by mass of barium titanate (average particle size 0.01 micron) and 2 parts by mass of vinylmethyldiethoxysilane into a vacuum kneader, stir and mix for 2.0 hours, then add 80 parts by mass of α,ω-diallyl Polydimethylsiloxane (viscosity at 25°C is 10000mPa·s), add 18 parts by mass of fumed silica (specific surface area is 200m2 / g), 9 parts by mass of hexamethyldisilazane, the material Stir at room temperature for 3.0 hours, raise the temperature to the material temperature of 160°C, heat and knead for 6.0 hours, and vacuum it for 2.0 hours, then add 20 parts by mass of α,ω-diallyl polydimethylsiloxane, 30 parts by mass part of silicone resin (e), mixed evenly, ground and filtered by a three-roll machine. Finally, the liquid silicone rubber base compound is obtained.

[0059] Add 0.2 parts by mass of 1% isopropanol solution of chloroplatinic acid to 100 parts by mass of the liquid silicone rubber base compound, stir evenly, remove air bubbles, and filter to ...

Embodiment 3

[0069] Add 25 parts by mass of strontium barium titanate (average particle size 0.1 micron) into the vacuum kneader, stir and mix for 1.0 hour, then add 70 parts by mass of α,ω-divinylpolydimethylsiloxane (at 25°C Viscosity is 15000mPa s), add 15 parts by mass of precipitated silica (specific surface area is 150m2 / g), 8 parts by mass of dimethyldimethoxysilane, stir the material at room temperature for 5.0 hours, and heat up to the material temperature of 180 ℃, heated and kneaded for 4.0 hours, then added 10 parts by mass of α,ω-divinyl polydimethylsiloxane and 15 parts by mass of silicone resin (e), mixed evenly, and ground and filtered by a three-roll machine. Finally, the liquid silicone rubber base compound is obtained.

[0070] Add 0.5 parts by mass of 1% platinum diacetoacetate solution to 100 parts by mass of the liquid silicone rubber base compound, stir evenly, remove air bubbles, and filter to obtain component (A).

[0071] In 100 parts by mass of liquid silicone r...

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Abstract

The invention relates to a base rubber material of high dielectric constant liquid silicon rubber and an application thereof in a composition. The base rubber material is applicable to manufactures which produce electrical insulation materials. The base rubber material comprises following components in parts by mass: 50-150 parts of aliphatic series unsaturated alkyl end capped organic polydimethylsiloxane (a), 5-30 parts of silicon dioxide reinforcing filler (b), 10-40 parts of ferroelectric ceramics material filler (c), 2-15 parts of structural controlling agent (d), 5-40 parts of silicon resin (e), and 0-4 parts of filler treating agent (f). The invention also discloses the application of the base rubber material in the composition. The ferroelectric ceramics material filler has good compatibility in liquid silicone rubber, the liquid silicone rubber material has good mechanical strength, the base rubber material has good stability for long-term storage, can rapidly cure and shape at a high temperature, and has short production cycle and high efficiency, and the cured elastomer material has high mechanical strength, prominent dielectricity, and low permanent compression and deformation.

Description

technical field [0001] The invention belongs to the technical field of electrical insulation materials, and in particular relates to an addition-type high dielectric constant liquid silicone rubber base rubber material capable of high-temperature rapid curing molding, high mechanical strength, and low permanent compression deformation and its application in the composition. Background technique [0002] With the rapid development of science and technology, the construction work related to various electrical equipment, high-voltage power equipment, and power transmission facilities is becoming more and more urgent and necessary. In the construction process of high-voltage power cable terminal joints, it is often necessary to cut off the cable shielding layer, resulting in distortion and uneven distribution of the electric field at the section. Breakdown brings great safety hazards to the normal operation of power facilities. Generally speaking, the operating life of high-vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/06C08K3/36C08K3/24
Inventor 杨思广张利萍林祥坚杨化彪李响张宇
Owner GUANGZHOU TINCI SILICONE TECHNOLOGY CO LTD
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