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Liquid silicone rubber for ceramic insulator coating and preparation method thereof

A technology of liquid silicone rubber and ceramic insulators, used in coatings, fire retardant coatings, etc.

Pending Publication Date: 2021-07-06
SHANGHAI RICH CHEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of science and technology and the rapid development of society, it is difficult for traditional RTV materials to meet the increasingly high anti-fouling flashover requirements, so it is urgent to develop an anti-fouling flashover coating with higher performance
In order for the coating to achieve the purpose of anti-fouling flashover, the coating material itself is required to have good insulation properties, electrical tracking resistance, flame retardancy, and good hydrophobicity, and room temperature vulcanized silicone rubber RTV itself is difficult to achieve all Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 50 parts by weight of liquid MQ silicone resin A into the planetary mixer, start stirring, add 30 parts by weight of modified precipitation method silica B in two batches, and then add 20 parts by weight of modified magnesium carbonate C in two batches, Vacuum and mix for 30 minutes, add 4.0 parts by weight of hydrogen-containing silicone oil D, 1.2 parts by weight of silane coupling agent E and 0.36 parts by weight of inhibitor F, vacuum and mix for 20 minutes, and then add 0.5 parts by weight of Cass to the resulting mixture Special catalyst G, vacuum mixed for 10 minutes, the obtained liquid silicone rubber can be used for molding to prepare test pieces to test physical properties, flame retardancy and tracking performance. Molding conditions: 2mm thickness test piece is 80℃ for 10 minutes, 6mm test piece is 80℃ for 20 minutes, in order to speed up the vulcanization speed, the molding temperature is selected to be 80℃.

Embodiment 2

[0035] Add 40 parts by weight of liquid MQ silicone resin A into the planetary mixer, start stirring, add 20 parts by weight of modified precipitation method silica B in two batches, and then add 40 parts by weight of modified magnesium carbonate C in two batches, pump Mix in vacuum for 30 minutes, add 3.2 parts by weight of hydrogen-containing silicone oil D, 1.2 parts by weight of silane coupling agent E and 0.36 parts by weight of inhibitor F, vacuum and mix for 20 minutes, and then add 0.5 parts by weight of Custer to the resulting mixture Catalyst G was vacuumed and mixed for 10 minutes, and the obtained liquid silicone rubber could be used for molding to prepare test pieces. The molding conditions and tests were the same as those in Example 1.

Embodiment 3

[0037] Add 45 parts by weight of liquid MQ silicone resin A into the planetary mixer, start stirring, add 25 parts by weight of modified precipitation method silica B in two batches, and then add 30 parts by weight of modified magnesium carbonate C in two batches, pump Mix in vacuum for 30 minutes, add 3.6 parts by weight of hydrogen-containing silicone oil D, 1.2 parts by weight of silane coupling agent E and 0.36 parts by weight of inhibitor F, vacuum and mix for 20 minutes, and then add 0.5 parts by weight of Custer to the resulting mixture Catalyst G was vacuumed and mixed for 10 minutes, and the obtained liquid silicone rubber could be used for molding to prepare test pieces. The molding conditions and tests were the same as those in Example 1.

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PUM

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Abstract

The invention discloses liquid silicone rubber for a ceramic insulator coating and a preparation method thereof. The liquid silicone rubber is prepared from the following raw materials in parts by weight: 30-70 parts of liquid MQ silicon resin, 5-40 parts of precipitated white carbon black, 10-50 parts of magnesium carbonate, 1-10 parts of hydrogen-containing silicone oil, 0.1-5 parts of an alkoxy silane coupling agent, 0.1-0.3 parts of a platinum inhibitor and 0.1-0.3 parts of a platinum catalyst. By introducing the MQ silicon resin, the mechanical strength and high temperature resistance of the liquid silicone rubber are improved, and the flame retardance of the liquid silicone rubber is remarkably improved through the synergistic effect of the MQ silicon resin and the flame-retardant filler, so that the pollution flashover resistance and tracking resistance of the liquid silicone rubber applied to a ceramic insulator coating are improved. The liquid silicone rubber disclosed by the invention has excellent tracking resistance and flame retardance, has good adhesiveness, hydrophobicity and aging resistance, and can meet the requirements of a ceramic insulator on the durability and tracking resistance of a silicone rubber coating.

Description

technical field [0001] The invention belongs to the technical field of polymer insulating materials, in particular to the field of silicone rubber insulating materials, in particular to a liquid silicone rubber for coating ceramic insulators and a preparation method thereof. Background technique [0002] Ceramic insulators are a very important part of power transmission and transformation equipment. This type of insulator has good chemical and thermal stability, strong aging resistance, good electrical and mechanical properties, flexible assembly, and has been widely used . The surface of ceramic insulators will gradually accumulate dirt during operation. When the dirt layer is wet, the dielectric in the dirt layer dissolves, and the leakage current increases, resulting in flashover on the insulating surface. The accident caused by this flashover is called a pollution flashover accident. With the rapid development of my country's industry, environmental pollution is becomin...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D183/05C09D7/62C09D7/63C09D7/65C09D5/18
CPCC08K2003/267C08L2201/02C09D5/18C09D183/04C09D7/62C09D7/63C09D7/65C09D7/70C08L83/04C08K13/06C08K9/06C08K7/26C08K3/26
Inventor 黄玉胜
Owner SHANGHAI RICH CHEM NEW MATERIAL
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