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Organic fluorine-modified epoxy resin for improving flashover voltage along surface, as well as preparation method and application thereof

一种环氧树脂、沿面闪络的技术，应用在有机氟改性环氧树脂及其制备领域，能够解决影响环氧复合绝缘材料老化性能、破坏等问题，达到降低材料体积/表面电阻率、工艺简单、提升沿面闪络电压的效果

Active Publication Date: 2019-06-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface fluorination of epoxy composite insulating materials destroys the dense three-dimensional cross-linked network structure of the surface layer, which affects the aging performance of epoxy composite insulating materials.

Method used

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  • Organic fluorine-modified epoxy resin for improving flashover voltage along surface, as well as preparation method and application thereof
  • Organic fluorine-modified epoxy resin for improving flashover voltage along surface, as well as preparation method and application thereof
  • Organic fluorine-modified epoxy resin for improving flashover voltage along surface, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of organic fluorine modified epoxy resin:

[0036] (1) Get 628g bisphenol A type epoxy resin, 134g hexafluorobisphenol A and add in the reactor, 150 ℃ of constant temperature stirs to obtain mixed solution;

[0037] (2) Add 72.6 g of tris-(dimethylaminomethyl)phenol to the mixed solution, mix well and react at 150°C for 6 hours to obtain an organic fluorine-modified epoxy resin.

[0038] The main reaction process is as follows:

[0039]

[0040] in:

[0041] Preparation of modified resin composites:

[0042] (1) Get 280g of the above organic fluorine modified epoxy resin, add 166g of methyltetrahydrophthalic anhydride and 0.3g of tri-(dimethylaminomethyl) phenol, mix well and then add 300g of Al 2 o 3 Filling, stirring in a vacuum reactor at a speed of 500r / min at 130°C for 20min to obtain a castable;

[0043] (2) Pour the castable into the mold, and after standing at 120°C for 3h, continue to stand at 140°C for 20h to obtain a modified epoxy resin...

Embodiment 2

[0051] Preparation of organic fluorine modified epoxy resin:

[0052] (1) Take 610g of bisphenol A type epoxy resin and 150g of hexafluorobisphenol A into the reactor, stir at a constant temperature of 130°C to obtain a mixed solution;

[0053] (2) Add 70 g of tris-(dimethylaminomethyl)phenol to the mixed liquid, mix well, and react at 130° C. for 5 hours to obtain an organic fluorine-modified epoxy resin.

[0054] (1) Get 186g of the above organic fluorine modified epoxy resin, add 112g of methyltetrahydrophthalic anhydride and 0.2g of tri-(dimethylaminomethyl) phenol and mix evenly, then add 448g of Al 2 o 3 Filling, stirring in a vacuum reactor at a speed of 500r / min at 120°C for 20min to obtain a castable;

[0055] (2) The pouring material was poured into the mold, and after standing at 110° C. for 4 hours, it was continued to stand at 150° C. for 12 hours to obtain a modified epoxy resin composite material with a diameter of 100 mm and a thickness of 1 mm.

Embodiment 3

[0057] Preparation of organic fluorine modified epoxy resin:

[0058] (1) Take 630g of bisphenol A type epoxy resin and 120g of hexafluorobisphenol A into the reactor, stir at a constant temperature of 170°C to obtain a mixed solution;

[0059] (2) Add 80 g of tris-(dimethylaminomethyl)phenol to the mixed liquid, mix well, and react at 170° C. for 7 hours to obtain an organic fluorine-modified epoxy resin.

[0060] (1) Take 321g of the above organic fluorine modified epoxy resin, add 261g of methyltetrahydrophthalic anhydride and 0.3g of tri-(dimethylaminomethyl) phenol, mix well and then add 164g of Al 2 o 3 Filling, stirring in a vacuum reactor at a speed of 500r / min at 140°C for 20min to obtain a castable;

[0061] (2) The pouring material was poured into the mold, and after standing at 130° C. for 2 hours, it was continued to stand at 130° C. for 25 hours to obtain a modified epoxy resin composite material with a diameter of 100 mm and a thickness of 1 mm.

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Abstract

The invention discloses organic fluorine-modified epoxy resin for improving the flashover voltage along a surface, as well as a preparation method and application thereof. The organic fluorine-modified epoxy resin is prepared by selecting bisphenol A epoxy resin and hexafluoro-bisphenol A as raw materials in a mild environment under the effect of catalyst tris(dimethylaminomethyl)phenol; the resinperformance can be realized through the reasonable proportion of raw material dosage, the process is simple, and industrial production can be easily realized; then, the modified resin serving as a base material is added with a curing agent, filler and accelerant to prepare the modified resin composite material. According to the preparation method, -CF3 group is introduced into epoxy resin under the situation that the surface state of an epoxy composite insulating material is not changed, the volume / surface specific resistance of the material can be reduced, charges cannot be easily gathered to the material surface, and the flashover voltage along a surface of the epoxy resin composite material can be improved.

Description

technical field [0001] The invention belongs to the field of modified resins, and in particular relates to an organic fluorine-modified epoxy resin for improving flashover voltage along a surface, a preparation method and application thereof. Background technique [0002] In the DC transmission system, epoxy resin is widely used in DC converter valves, saturable reactors, DC bushings, gas insulated transmission lines (GIL) and gas insulated switches (GIS) due to its excellent insulation and mechanical properties. equipment. Under a DC electric field, the high insulation of epoxy resin makes the surface very easy to accumulate a large number of surface charges with a long decay period due to carrier injection, which may lead to a significant decrease in the insulation strength of the system, and even cause flashover and breakdown along the surface. Thus threatening the safety of power grid operation. With the rapid increase of the voltage level, the obvious charge accumulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C08L63/00C08K3/22
CPCC08G59/245C08G59/308C08K3/22C08K2003/2227C08K3/013C08L63/00C08K5/0025C08K5/1539C08K5/18C08L2205/02
Inventor 赵玉顺杨克荣白金辉陈维江王学培何元菡
Owner HEFEI UNIV OF TECH
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