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Preparation method of vacuum pressure impregnation resin

A vacuum pressure impregnation and resin technology, which is applied in the field of vacuum pressure impregnation resin preparation, can solve the problems of short storage period, serious environmental pollution, and environmental pollution, and achieve the effects of reducing operating temperature, simplifying the process flow, and excellent electrical properties

Active Publication Date: 2013-09-11
上海电气集团上海电机厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-glue vacuum pressure impregnation resins suitable for high-voltage motors require low viscosity, low shrinkage of cured products, and excellent electrical properties. However, most of the impregnating resins suitable for low-voltage motors are on the market. Currently, low-glue vacuum pressure impregnation resins are suitable for high-voltage motors. Mainly pure epoxy anhydride or styrene as diluent (for example, in patents with publication numbers US4173593, CN86102546B, and CN1827717A, pure epoxy anhydride or styrene is used as diluent), the former has high viscosity and needs to be heated and impregnated The motor has high requirements on the factory’s operating process, and when curing, benzyldimethylamine accelerators should be placed around the drying room to pollute the environment; the latter is highly volatile and seriously pollutes the environment
In the patent whose publication number is CN1865314A, the epoxy vacuum pressure impregnation resin involved has a long gelation time and a short storage period; while the impregnation resin involved in CN101319086A has high requirements on the factory's operating process, and benzyl dimethyl must be added during curing. Amine accelerators, polluting the environment
[0004] In the patent whose publication number is CN1827717A, a method for preparing impregnated resin is disclosed. Due to the use of styrene, the impregnated resin obtained by this method has a large odor and high volatility, which seriously pollutes the environment.

Method used

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  • Preparation method of vacuum pressure impregnation resin
  • Preparation method of vacuum pressure impregnation resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 (method 1)

[0027] Heat 100 parts by weight of hydantoin epoxy and 30 parts by weight of acidic polyester resin to 100-110°C, stir evenly and maintain it for 0.5 hours, then add 0.1 parts by weight of hydroquinone, continue stirring for 0.5 hours, then cool down to 80°C, Add 319 parts by weight of methyl hexahydrophthalic anhydride, keep at this temperature for 20 minutes and then cool down to 60°C, then add glycidyl methacrylate dissolved in 0.1 parts by weight of chromium acetylacetonate and 0.4 parts by weight of dicumyl peroxide 270 parts by weight were stirred at 60°C for 0.5 hours to obtain a vacuum pressure impregnation resin.

Embodiment 2

[0028] Embodiment 2 (method 2)

[0029] Heat the mixture of 100 parts by weight of high-purity bisphenol A low-molecular epoxy and 5 parts by weight of maleic anhydride to 100-110°C, stir well and keep it for 0.5 hours, then cool down to 80°C, add 80 parts by weight of methylhexa hydrophthalic anhydride, stirred for 20 minutes. 2 parts by weight of dicumyl peroxide was added to 30 parts by weight of diallyl phthalate, and stirred at 110° C. for 1.5 hours. Then cool down to about 60°C and add 1 part by weight of p-tert-butylcatechol and 2 parts by weight of chromium acetylacetonate. After stirring for 0.5 hours, add the above-mentioned bisphenol A epoxy, maleic anhydride and methyl hexahydro to the mixture The mixture of phthalic anhydride was stirred at 60° C. for 0.5 hours to obtain a vacuum pressure impregnation resin.

Embodiment 3

[0030] Embodiment 3 (method 1)

[0031] Heat the mixture of 100 parts by weight of novolac epoxy and 10 parts by weight of acidic polyester resin to 100-110°C, stir evenly and maintain it for 0.5 hours, then cool to 80°C, add 175 parts by weight of methyl tetrahydrophthalic anhydride, at this temperature After stirring for 20 minutes, cool down to 60°C, add 100 parts by weight of 1,2-monoepoxy that dissolved 0.3 parts by weight of bis(2-phenylethoxy)dicarbonate and 0.1 parts by weight of chromium acetylacetonate - 4-Vinylcyclohexene, stirred at this temperature for 0.5 hours.

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Abstract

The invention relates to a preparation method of vacuum pressure impregnation resin. According to the invention, a low-smell multi-functionality low-volatilization active diluent agent is used for replacing styrene which causes severe environmental pollution. The diluent agent at least comprises two functional groups, wherein one is a double-bond functional group, and the other is a double-bond functional group or a functional group which can subject to a reaction with epoxy or a curing agent. The impregnation resin provided by the invention is advantaged in small viscosity, short gelatinizing time, excellent electrical properties, high heat-resistance, environment-friendliness, and safe application.

Description

technical field [0001] The invention relates to a preparation method of impregnating resin, in particular to a preparation method of vacuum pressure impregnating resin. Background technique [0002] The motor winding is composed of various components such as electromagnetic wire, slot insulation, phase insulation, interlayer insulation, slot wedge and binding fixed insulation. It is a loose assembly, so it must be insulated to insulate the entire winding Bonding becomes a whole, improving the heat resistance, thermal conductivity, electrical strength, mechanical strength and environmental medium corrosion resistance of the entire insulating structure. [0003] Vacuum pressure impregnation is the best insulation treatment technology in the world today, which includes medium glue vacuum pressure impregnation and less glue vacuum pressure impregnation, and the latter is the development direction of vacuum pressure impregnation. Low-glue vacuum pressure impregnation resins suit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/10C08F283/01
Inventor 梁茵陈宗旻张赟周晓晟才若庆田玉祥田建辉胡义李晓初
Owner 上海电气集团上海电机厂有限公司
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