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Method for preparing elastic epoxy resin for epoxy resin casting dry type transformer

A technology of dry-type transformer and epoxy resin, which is applied in the field of epoxy resin toughening, can solve problems such as difficult to meet the requirements of dry-type transformers, and achieve good mechanical properties, improved crack resistance and impact resistance, and good compatibility Effect

Active Publication Date: 2017-02-22
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of the defect that epoxy resins modified by various toughening materials in the prior art are difficult to meet the requirements of dry-type transformers, the purpose of the present invention is to provide a toughening agent based on polysulfone ester for preparing anti-cracking and impact-resistant Method for modifying epoxy resin with excellent performance

Method used

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  • Method for preparing elastic epoxy resin for epoxy resin casting dry type transformer
  • Method for preparing elastic epoxy resin for epoxy resin casting dry type transformer
  • Method for preparing elastic epoxy resin for epoxy resin casting dry type transformer

Examples

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Embodiment 1

[0033] (1) Mix polysulfone ester and acid anhydride curing agent methyltetrahydrophthalic anhydride (MTHPA) according to the ratio of 10 parts: 85 parts, and stir for 1 hour at 130-150°C, so that polysulfone ester is fully dissolved in methyltetrahydrophthalic anhydride , and then add 0.3 parts of catalyst, such as benzyl dimethylamine, to obtain a transparent viscous solution; then bisphenol A epoxy resin and prepared polysulfone ester / methyltetrahydrophthalic anhydride mixture, according to The ratio of 100 parts: 95 parts was stirred and mixed at 130°C, fully dissolved to obtain a homogeneous solution; the temperature was lowered to 80°C to obtain prepolymer A, and set aside;

[0034] (2) Mix polysulfone ester and acid anhydride curing agent methyl hexahydrophthalic anhydride (MHHPA) according to the ratio of 21.5 parts: 85 parts, and stir at 120-150°C for 1 hour, so that polysulfone ester is fully dissolved in methyl hexahydrophthalic anhydride , then add 0.5 parts of cata...

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Abstract

The present invention discloses a method for preparing an elastic epoxy resin for epoxy resin casting dry type transformers. According to the method, an anhydride curing agent and a polysulfone ester are subjected to mixing dissolving at a temperature of 80-150 DEG C to obtain a polysulfone ester modified anhydride curing agent, and the polysulfone ester modified anhydride curing agent and an epoxy resin are cured at a temperature of 80-150 DEG C so as to obtain the modified epoxy resin. With the method of the present invention, the toughness of the epoxy resin can be effectively improved, such that the epoxy resin can meet the performance requirements of cracking resistance and impact resistance of the casting dry type transformer.

Description

technical field [0001] The invention relates to a method for preparing elastic epoxy resin for epoxy resin casting dry-type transformers, and belongs to the technical field of epoxy resin toughening. Background technique [0002] Epoxy resin casting type dry-type transformers use epoxy resin as the main insulation. It has a simple structure, small size, high mechanical strength, strong short-circuit resistance, excellent moisture-proof and corrosion resistance, and small partial discharge and long operating life. , low loss, strong overload capacity, the company has rich experience in design and manufacturing, the products have high safety reliability and good environmental protection characteristics, especially the operation performance is very good. Although epoxy resin cast dry-type transformers have many advantages, with the development of society, people's requirements for transformers are also increasing. While super-large-capacity transformers continue to emerge, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L81/06C08G59/42
Inventor 王新龙周江明喻林罗炎邓海波
Owner CHINA PETROLEUM & CHEM CORP
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