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Epoxy resin casted insulating material, and preparation method and application method thereof

A technology for epoxy resin and casting material, which is applied to the field of epoxy resin casting insulating material and its preparation, can solve the problems of low high temperature resistance level and insufficient transition temperature, and achieve the effect of improving the temperature resistance level and glass transition temperature.

Inactive Publication Date: 2019-05-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transition temperature of epoxy resin for electrical engineering is not high enough at present, so that its high temperature resistance level is low.

Method used

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  • Epoxy resin casted insulating material, and preparation method and application method thereof
  • Epoxy resin casted insulating material, and preparation method and application method thereof
  • Epoxy resin casted insulating material, and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation process of the epoxy resin casting material of this embodiment is as follows:

[0031] Step 1. First, weigh 100 parts of epoxy resin, 80 parts of curing agent, 0.3 parts of accelerator, 0.1 part of nano-titanium dioxide filler and 0.0015 parts of coupling agent.

[0032] Step 2. Mix the weighed nano-titanium dioxide filler with absolute ethanol and perform ultrasonic dispersion, then add the coupling agent weighed in step 1 and mix evenly to obtain a mixed solution A. Heat the mixed solution A to 60°C and pass the homogenization Mixture B was obtained after machine treatment.

[0033] Step 3. Add the above mixed solution B into the weighed epoxy resin and mix evenly, then circulate and stir at 90°C until the ethanol is completely volatilized and then cool to room temperature to obtain the mixed solution C.

[0034] Step 4, then mix the obtained mixed solution C with the weighed curing agent and accelerator to obtain the mixture D, and carry out the vacu...

Embodiment 2

[0037] The preparation process of the epoxy resin casting material of this embodiment is as follows:

[0038] Step 1. First, weigh 100 parts of epoxy resin, 80 parts of curing agent, 3 parts of accelerator, 1 part of nano-titanium dioxide filler and 0.01 part of coupling agent by mass.

[0039] Step 2. Mix the weighed nano-titanium dioxide filler with absolute ethanol and perform ultrasonic dispersion, then add the coupling agent weighed in step 1 and mix evenly to obtain a mixed solution A. Heat the mixed solution A to 30°C and pass through the homogenizer Mixture B was obtained after machine treatment.

[0040] Step 3. Add the above mixed solution B into the weighed epoxy resin and mix evenly, then circulate and stir at 60°C until the ethanol is completely volatilized and then cool to room temperature to obtain the mixed solution C.

[0041] Step 4, then mix the obtained mixed solution C with the weighed curing agent and accelerator to obtain the mixture D, and carry out th...

Embodiment 3

[0044] The preparation process of the epoxy resin casting material of this embodiment is as follows:

[0045] Step 1. First, weigh 100 parts of epoxy resin, 80 parts of curing agent, 0.1 part of accelerator, 5 parts of nanometer titanium dioxide filler and 0.15 part of coupling agent.

[0046] Step 2, then mix the weighed nano-titanium dioxide filler with absolute ethanol and ultrasonically disperse, then add the coupling agent weighed in step 1 and mix evenly to obtain a mixed solution A, heat the mixed solution A to 80°C and pass Mixed liquid B is obtained after homogenization.

[0047] Step 3. Add the above mixed solution B into the weighed epoxy resin and mix evenly, then circulate and stir at 150°C until the ethanol is completely volatilized and then cool to room temperature to obtain the mixed solution C.

[0048] Step 4, then mix the obtained mixed liquid C with the weighed curing agent and accelerator to obtain the mixture D, and carry out the vacuum degassing treatme...

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Abstract

The invention provides an epoxy resin casted insulating material, and a preparation method and an application method thereof. According to the preparation method, an appropriate amount of a nanometertitanium dioxide filling material processed through surface silane coupling agent modification processing is added before bisphenol A type epoxy resin curing; the surface modified nanometer titanium dioxide is capable of realizing bonding with epoxy resin main molecule chains through chemical bonds, so that inhibition effect on the heat motion of epoxy resin main molecule chains is achieved, and epoxy resin casted material glass-transition temperature is increased. The preparation method can be used for increasing of the heat resistant grade of electrical equipment epoxy resin casted insulating material. Pure epoxy resin casted material glass-transition temperature is 81 DEG C, and the glass-transition temperature of the epoxy resin casted insulating material prepared using the preparationmethod is increased to 116 DEG C.

Description

technical field [0001] The invention relates to a method for modifying an epoxy resin cast insulating material, in particular to an epoxy resin cast insulating material and a preparation method and a use method thereof. Background technique [0002] With the wide application of high-voltage and large-capacity electrical equipment and high-power power electronic equipment and devices, epoxy resin casting insulating materials have become important insulating materials. Epoxy resin casting insulating materials are generally used in high-voltage insulating tie rods, insulating packages of power electronic devices, support insulators and basin insulators in gas-insulated switchgear, high-voltage bushings, power electronic transformers, high-voltage transformers, etc. [0003] Most of the epoxy resins used in electrical engineering are bisphenol A type, and the working temperature of epoxy resin cast insulation materials is from ambient temperature to glass transition temperature,...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K3/22C08K9/06
Inventor 王诗航于是乎李建英李盛涛
Owner XI AN JIAOTONG UNIV
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