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An outdoor electrical insulation epoxy resin castable for transformer

An epoxy resin, electrical insulation technology, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve the problems of unobtainable raw materials, high price, complex synthesis process, etc., achieve long pot life, improve resistance to cold and heat exchange The ability to change, the effect of excellent physical and chemical properties

Active Publication Date: 2016-03-02
JIANGXI TENGDE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the electrical insulating castables used outdoors use imported alicyclic epoxy resin series. Because of their high price, unavailable raw materials, and complicated synthesis process, they form a bottleneck in the manufacture of outdoor transformers.

Method used

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Experimental program
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Effect test

Embodiment Construction

[0029] The steps of the specific embodiment of the present invention are as follows:

[0030] 1. Prepare materials according to the following formula

[0031] (1) Resin

[0032] Silicone modified epoxy resin: 10kg;

[0033] Novolac epoxy resin: 10kg;

[0034] Brominated epoxy resin: 5kg;

[0035] Bisphenol F type epoxy resin: 25kg;

[0036] (2) filler

[0037] Silane treated silica powder: 100kg;

[0038] (3) curing agent

[0039] Modified methyl hexahydrophthalic anhydride: 43kg;

[0040] (4) Other additives

[0041] Imidazole accelerator: 0.025kg;

[0042] Plasticizer: 5kg;

[0043] Active diluent: 1.5kg;

[0044] Silane coupling agent: 0.5kg;

[0045] Colorant: 1.5kg;

[0046] Antioxidant: 0.4kg;

[0047] 2. Mix silicone-modified epoxy resin, phenolic epoxy resin, brominated epoxy resin and bisphenol F epoxy resin according to the formula ratio, and heat to melt;

[0048]3. Add silane to the resin mixture to treat silicon micropowder and stir evenly; then whi...

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PUM

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Abstract

The invention relates to an electric-insulation epoxy resin castable for an outdoor mutual inductor. The epoxy resin castable comprises the following materials by weight percent: 21-26% of resin, 45-55% of filling, 15-25% of a curing agent and 2-6% of other auxiliary agents, wherein the resin is formed by mixing organic silicon modified epoxy resin, phenolic aldehyde epoxy resin, brominated epoxy resin and bisphenol F-type epoxy resin; the filling is silane-processed silica powder; the curing agent is modified methylhexahydrophthalic anhydride; the other auxiliary agents include a curing catalyst, a plasticizer, a reactive diluent, a silane coupling agent, a coloring agent and an antioxidant. The electric-insulation epoxy resin castable has excellent physical and chemical properties and has the performance of heat resistance, low temperature resistance, ultraviolet irradiation resistance, ageing resistance and the like. The electric-insulation epoxy resin castable is applicable to the electric insulation of the outdoor mutual inductor and other electrical equipment.

Description

technical field [0001] The invention relates to a method for preparing an electrical insulating epoxy resin castable for outdoor transformers, belonging to the technical field of electrical insulating materials. Background technique [0002] With the development of my country's electric power industry, there is a higher demand for outdoor transformers. Outdoor transformers must withstand changes in outdoor weather and strong ultraviolet radiation, which puts forward higher requirements for transformer insulation materials. At present, most of the electrical insulating castables used outdoors use imported alicyclic epoxy resin series. Because of their high price, unavailable raw materials, and complicated synthesis process, they form a bottleneck in the manufacture of outdoor transformers. Contents of the invention [0003] The object of the present invention is, aiming at the current demand for insulating materials of outdoor transformers, the present invention proposes a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L63/00C08L63/04C08K13/06C08K9/06C08K3/34C08G59/42H01B3/40
Inventor 杨国飞邓华春董芳
Owner JIANGXI TENGDE IND
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