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Heat-resistant epoxy anhydride resin suitable for vacuum pressure impregnation (VPI) and preparing method and application thereof

A technology of epoxy resin and heat-resistant resin, used in epoxy resin coatings, plastic/resin/wax insulators, coil manufacturing, etc., can solve problems such as poor insulation performance of products, achieve fast curing speed, good heat resistance, Conducive to environmental protection and the health of operators

Inactive Publication Date: 2010-10-20
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an epoxy anhydride heat-resistant resin suitable for heating VPI, which solves the problem that vacuum pressure impregnation in the prior art uses active diluents such as styrene to cause vacuum pressure impregnation to require high temperature and long-term curing. Defects such as poor insulation performance

Method used

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  • Heat-resistant epoxy anhydride resin suitable for vacuum pressure impregnation (VPI) and preparing method and application thereof
  • Heat-resistant epoxy anhydride resin suitable for vacuum pressure impregnation (VPI) and preparing method and application thereof
  • Heat-resistant epoxy anhydride resin suitable for vacuum pressure impregnation (VPI) and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 is suitable for the preparation of the epoxy anhydride heat-resistant resin of heating VPI

[0028] The composition of the epoxy anhydride heat-resistant resin suitable for heating VPI is as follows:

[0029]

[0030] Preparation of raw materials:

[0031] Among them, 100 kg of JF9955A molecularly distilled bisphenol A molecular epoxy resin is hot-melted and added to the reaction kettle for stirring, vacuum dehumidification for 0.5h, the material is stirred evenly, filtered, and individually sealed and packaged. Add 100 kg of methylhexahydrophthalic anhydride into the reaction kettle, stir evenly, vacuum dehumidify for 0.5h, filter, and pack in a separate airtight package.

[0032] Raw material storage:

[0033] JF9955A molecularly distilled bisphenol A molecular epoxy resin and methyl hexahydrophthalic anhydride are packaged and stored separately. The storage period of each component in an airtight container below 20°C is ≥12 months. This method is su...

Embodiment 2

[0036] Embodiment 2 is suitable for the preparation of the epoxy anhydride heat-resistant resin of heating VPI

[0037] The composition of the epoxy anhydride heat-resistant resin suitable for heating VPI is as follows:

[0038]

[0039] Preparation of raw materials:

[0040] Among them, 100 kg of JF9955A molecularly distilled bisphenol A molecular epoxy resin is hot-melted and added to the reaction kettle for stirring, vacuum dehumidification for 0.5h, the material is stirred evenly, filtered, and individually sealed and packaged. Add 90 kg of methyltetrahydrophthalic anhydride into the reaction kettle, stir evenly, vacuum dehumidify for 0.5h, filter, and pack separately.

[0041] Raw material storage:

[0042] JF9955A molecularly distilled bisphenol A molecular epoxy resin and methyltetrahydrophthalic anhydride are packaged and stored separately. The storage period of each component in an airtight container below 20°C is ≥12 months. This method is suitable for heating...

Embodiment 3

[0045] Embodiment 3 is suitable for the preparation of the epoxy anhydride heat-resistant resin of heating VPI

[0046] The composition of the epoxy anhydride heat-resistant resin suitable for heating VPI is as follows:

[0047]

[0048] Preparation of raw materials:

[0049] Among them, 100 kg of JF9955A molecularly distilled bisphenol A molecular epoxy resin is hot-melted and added to the reaction kettle for stirring, vacuum dehumidification for 0.5h, the material is stirred evenly, filtered, and individually sealed and packaged. Add 110 kg of methyltetrahydrophthalic anhydride into the reaction kettle, stir evenly, dehumidify in vacuum for 0.5 h, filter, and pack in a separate airtight package.

[0050] Storage method, resin preparation method are similar to embodiment 1,2.

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Abstract

The invention discloses heat-resistant epoxy anhydride resin suitable for vacuum pressure impregnation (VPI), which is characterized by comprising bisphenol A-type epoxy resin and liquid anhydride which are at the weight ratio of 1:0.8-1.2. The heat-resistant epoxy anhydride resin comprises no volatile cinnamic activated diluents, the cured heat-resistant epoxy anhydride resin has good resistance, high mechanical strength and low dielectric loss factor. The heat-resistant epoxy anhydride resin is suitable for the VPI insulation of the high-voltage motor, the wind power motor, the nuclear power motor and the coil and the impregnation of the electric generator and can meet the technical requirement for the insulation of the single coil bar for the large-scale hydroelectric generating unit and the steam-turbine generatoing unit.

Description

technical field [0001] The invention belongs to the technical field of vacuum pressure impregnation, and in particular relates to an epoxy anhydride heat-resistant resin suitable for heating VPI and its preparation method and application. Background technique [0002] The varnish-dipping insulation treatment process of motor and transformer windings ranges from immersion (ordinary immersion) to multiple immersion, and then to dripping paint, rolling immersion and vacuum varnish, and the integration of vacuum pressure immersion and drying forms a series of various mechanized continuous processes. The operation is an impregnation process automatically controlled by modern computer technology and PLC technology. The vacuum pressure impregnation (Vacuum Pressure Impregnation, VPI) process is to pre-dry the workpiece to remove moisture and then cool it, place it in a vacuum environment, remove the air and volatiles inside the white blank coil, rely on the gravity of the paint liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C08G59/20C08L63/02C09D163/02H01B3/40H01F41/12H02K15/12
Inventor 张犇夏宇陶纯初李翠翠朱颐陆春
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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