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A kind of epoxy resin for hydrophobic outdoor electrical insulation and preparation method thereof

An epoxy resin and electrical insulation technology, which is applied in the field of epoxy resin for hydrophobic outdoor electrical insulation and its preparation, can solve problems such as the influence of production stability, achieve reasonable chemical structure design, controllable process, crack resistance and The effect of excellent mechanical properties

Active Publication Date: 2022-05-24
上海桐翠新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsification process has strict requirements on the process temperature, process time and feeding sequence, making it deeply affected by production stability.

Method used

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  • A kind of epoxy resin for hydrophobic outdoor electrical insulation and preparation method thereof
  • A kind of epoxy resin for hydrophobic outdoor electrical insulation and preparation method thereof
  • A kind of epoxy resin for hydrophobic outdoor electrical insulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 98 grams of diglycidyl hexahydrophthalate and 0.01 grams of sulfonated castor oil were added to the reactor equipped with a vacuum system, a feeding system, a heating and cooling system and a stirring system, and the vacuum was evacuated to the maximum negative pressure, and then charged. Nitrogen was introduced to ensure an oxygen-free state in the reactor. Then, in a nitrogen atmosphere, the temperature was raised to 160°C, while 2 g parts of 2-(3-perfluorooctyl)propoxy-1,2,3-propanetricarboxylic acid were added at a constant rate through the feeding system, maintaining The reaction temperature was carried out for about 3 hours to obtain a fluorine compound-modified epoxy resin with an epoxy value of 0.48. Then add 8 grams of hydroxy silicone oil (viscosity about 1000mPa) and sodium methoxide methanol solution of the above-mentioned total amount at a constant speed through the feeding system, keep the temperature reaction for 2 hours, cool to 60 ° C, and add a total a...

Embodiment 2

[0058] 90 grams of diglycidyl hexahydrophthalate and 0.01 grams of 2-phenylimidazole solution were added to the reactor equipped with a vacuum system, a feeding system, a heating and cooling system and a stirring system, and vacuumed to the maximum negative pressure, Nitrogen was then charged to ensure an oxygen-free state in the reactor. Then, in a nitrogen atmosphere, the temperature was heated to 150 ° C, and 10 grams of C8-C14 perfluoroalkyl ethanol was added at a constant speed through the feeding system, and the reaction temperature was maintained for about 3 hours to obtain a modified fluorine compound with an epoxy value of 0.40. epoxy resin. Then, 8 mass % methylphenylsiloxane (DC-3074) and 0.1 g of tetraisopropyl titanate (TIPI) were added at a constant speed through the feeding system, and the temperature was kept for 2 hours, and then cooled to 60 °C. ℃, and adding a total amount of 0.1% by mass of a leveling agent, a defoaming agent, etc., to obtain a hydrophobic...

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Abstract

The invention provides a hydrophobic epoxy resin for outdoor electrical insulation and a preparation method thereof. The preparation process is as follows: an organic silicon-modified alicyclic epoxy resin containing an amino group or a hydroxyl group, a toughened modified 4-formaldehyde Base hexahydrophthalic anhydride and hydrophobic mineral powder are mixed, after vacuum defoaming, automatic pressure gel or traditional vacuum pouring process are carried out to obtain hydrophobic epoxy resin for outdoor electrical insulation; the hydrophobic epoxy resin for outdoor electrical insulation is mainly The characteristic is to use three-block chemical modification means to realize the controllable production of hydrophobic epoxy resin for outdoor electrical insulation, reduce the instability in the production process control process, and the hydrophobicity of the system can minimize moisture and The opportunity to form a continuous wet area in a polluted environment can reduce the leakage current while reducing the corrosion of the insulation, and improve the reliability and average service life of the insulation. The curing agent containing toughened 4-methylhexahydrophthalic anhydride makes the system have better crack resistance, which has changed the inherent shortcomings of low molecular weight alicyclic epoxy resins in outdoor epoxy resin systems on the market due to poor toughness.

Description

technical field [0001] The invention relates to the field of preparation of epoxy resins for electrical insulation, in particular to a hydrophobic epoxy resin for outdoor electrical insulation and a preparation method thereof. Background technique [0002] Epoxy resin has excellent mechanical properties, electrical insulating properties and heat resistance, and is widely used as electrical insulating material for electrical equipment. Especially since alicyclic epoxy resin was introduced into the application of outdoor transformers, the crack resistance and weather resistance of epoxy resin systems for outdoor electrical insulation have received great attention. [1]- . [0003] Silicone not only has low surface energy, but also has the advantages of excellent low temperature flexibility, weather resistance, hydrophobicity and thermal oxidation resistance. [2] ,. In recent years, silicones have been widely used to reduce the internal stress and toughness of epoxy resins in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K5/09C08K3/36C08G59/14
CPCC08K5/09C08K3/36C08G59/1494C08G59/1444C08G59/1438C08L63/00
Inventor 于杰莫海林
Owner 上海桐翠新材料科技有限公司
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