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Rubber sealing material for electrical equipment and preparation method thereof

A rubber sealing and electrical equipment technology, applied in the field of rubber, can solve the problems of poor physical and mechanical properties of butyl rubber, low production efficiency of butyl rubber, and limited availability of butyl rubber, etc., and achieve short vulcanization process time and excellent stability The effect of good performance and mechanical properties

Pending Publication Date: 2020-07-24
XIAN SUNWARD AEROSPACE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the production efficiency of butyl rubber in my country is low and the output is small, and about 84% of butyl rubber products are used in the automobile industry, and there is not much butyl rubber available for other industries
Therefore, with the new environmentally friendly C 3 f 7 With the continuous popularization and application of CN and C5FK mixed gas-insulated switchgear, if butyl rubber is used as the sealing material of gas-insulated switchgear, it is difficult to supply butyl rubber that matches the quantity of sealing materials required by a large number of gas-insulated switchgears. Butyl rubber The problem of low production efficiency will become an important factor limiting its use as a rubber sealing material for electrical equipment
The main reason for the low production efficiency of butyl rubber is that the thermal conductivity of butyl rubber vulcanizate is 0.09W / m·℃, and its thermal conductivity is extremely poor. This characteristic is extremely unfavorable to production and processing, such as slow cooling speed of semi-finished thermal film, The heat transfer efficiency of thick products is low during vulcanization, resulting in low production efficiency and high product defect rate
At the same time, the physical and mechanical properties of butyl rubber are poor, and the service life is short under complex working conditions. 3 f 7 CN and C5FK mixed gases are well compatible, and it is inevitable that they will be damaged due to poor physical and mechanical properties and need to be replaced frequently

Method used

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  • Rubber sealing material for electrical equipment and preparation method thereof
  • Rubber sealing material for electrical equipment and preparation method thereof
  • Rubber sealing material for electrical equipment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step (1): modify carbon nanofibers by emulsion polymerization with acrylate: by mass ratio, methyl methacrylate: butyl acrylate: diethylene glycol diacrylate: acrylic acid is 79:14:5 The ratio of 2 is to get the four monomers, the initiator potassium thiosulfate consumption is 0.5% of the total weight of the four monomers, and the carbon nanofiber consumption is 5 times of the total weight of the four monomers , put the obtained raw materials in water containing an emulsifier and stir them at high speed, and react at a temperature of 76°C to 82°C for 3.5 hours, and the obtained product is cooled, filtered and vacuum-dried to obtain acrylate-modified carbon nanofibers;

[0023] Step (2): According to the mass parts, crush 50 parts of butyl rubber and 50 parts of EPDM rubber and send them into the internal mixer, and add 0.2 parts of magnesium oxide, 0.5 parts of anti-aging agent, and 0.2 parts of stearic acid in sequence. parts, 75 parts of carbon black, 10 parts of acry...

Embodiment 2

[0029] Step (1): modify carbon nanofibers by emulsion polymerization with acrylate: by mass ratio, methyl methacrylate: butyl acrylate: diethylene glycol diacrylate: acrylic acid is 79:14:5 The ratio of 2 is to get the four monomers, the initiator potassium thiosulfate consumption is 0.5% of the total weight of the four monomers, and the carbon nanofiber consumption is 5 times of the total weight of the four monomers , put the obtained raw materials in water containing an emulsifier and stir them at high speed, and react at a temperature of 76°C to 82°C for 3.5 hours, and the obtained product is cooled, filtered and vacuum-dried to obtain acrylate-modified carbon nanofibers;

[0030] Step (2): According to the mass parts, 70 parts of butyl rubber and 30 parts of EPDM rubber are crushed and sent to the internal mixer, and 4 parts of magnesium oxide, 1.5 parts of anti-aging agent and 3 parts of stearic acid are sequentially added. 50 parts of carbon black, 30 parts of acrylate m...

Embodiment 3

[0036] Step (1): modify carbon nanofibers by emulsion polymerization with acrylate: by mass ratio, methyl methacrylate: butyl acrylate: diethylene glycol diacrylate: acrylic acid is 79:14:5 The ratio of 2 is to get the four monomers, the initiator potassium thiosulfate consumption is 0.5% of the total weight of the four monomers, and the carbon nanofiber consumption is 5 times of the total weight of the four monomers , put the obtained raw materials in water containing an emulsifier and stir them at high speed, and react at a temperature of 76°C to 82°C for 3.5 hours, and the obtained product is cooled, filtered and vacuum-dried to obtain acrylate-modified carbon nanofibers;

[0037] Step (2): According to the mass parts, crush 90 parts of butyl rubber and 10 parts of EPDM rubber and send them into the internal mixer, and add 1 part of magnesium oxide, 1 part of anti-aging agent, and 2 parts of stearic acid in sequence. parts, 90 parts of carbon black, 0.5 parts of acrylate mo...

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PUM

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Abstract

The invention discloses a rubber sealing material for electrical equipment and a preparation method thereof. The rubber sealing material comprises the following components in parts by mass: 50-100 parts of butyl rubber or modified butyl rubber, 0-50 parts of ethylene propylene diene monomer, 50-90 parts of carbon black, 1-20 parts of a plasticizer, 0.2-4 parts of magnesium oxide, 0.2-3 parts of stearic acid, 1-5 parts of zinc oxide, 0.5-2 parts of an accelerant, 0.5-1.5 parts of an anti-aging agent and 0.5-30 parts of acrylate modified carbon nanofibers. The preparation method comprises the following steps: mixing butyl rubber or modified butyl rubber with other compounding agents, thinning and vulcanizing. Butyl rubber or modified butyl rubber is used as the base material, acrylate modified carbon nanofibers are used as the heat-resistant filler, the prepared material has better heat-conducting property, physical and mechanical properties, wear resistance and chemical inertness and can be well compatible with SF6 gas, C3F7CN mixed gas and C5FK mixed gas and is suitable for an insulating gas switch cabinet of the SF6 gas, the C3F7CN mixed gas and the C5FK mixed gas.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a rubber sealing material for electrical equipment and a preparation method thereof. Background technique [0002] Sulfur hexafluoride (SF 6 ) Gas insulated switchgear is a kind of electrical equipment with a long history and wide application, and EPDM material is commonly used as sealing ring for sealing. However, SF 6 It is a gas with a strong greenhouse effect, and has been listed by international organizations as one of the six greenhouse gases that must be restricted. Therefore, it is necessary to look for alternatives to SF 6 The environmentally friendly gas has become a research hotspot. In recent years, newly developed environmentally friendly insulating gases such as C 3 f 7 CN mixed gas, C5FK mixed gas as SF 6 Alternative gases have good application prospects. However, it has been proven that EPDM materials are compatible with C 3 f 7 The compatibility of mixed gases of CN...

Claims

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Application Information

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IPC IPC(8): C08L23/22C08L23/16C08L23/28C08K13/06C08K9/04C08K7/06C08K3/22C08K5/09C08K3/04C08K5/47C08K5/40C08K5/18C08F220/14C08F220/18C08F222/20C08F220/06
CPCC08L23/22C08L23/16C08L23/283C08F220/14C08L2205/03C08K2003/222C08K2201/011C08K2003/2296C08L2201/14C08K2201/001C08K13/06C08K9/08C08K7/06C08K3/22C08K5/09C08K3/04C08K5/47C08K5/40C08K5/18
Inventor 王小安刘海军杨衎赵佳琪冀建波叶长青
Owner XIAN SUNWARD AEROSPACE MATERIAL
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