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Extra-high voltage insulation coating and preparation method thereof

An insulating coating and ultra-high voltage technology, applied in the field of coatings, can solve the problems of insufficient overall performance of insulating coatings, conductive risks in long-term use, and hidden dangers in long-term use, so as to increase the insulating and mechanical properties of coatings, shorten grinding time, Effect of reducing surface charge build-up

Active Publication Date: 2016-03-02
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing insulating coatings are epoxy systems, which are widely used in ultra-high or ultra-high voltage transmission networks. This is due to the outstanding anti-corrosion and insulating properties of epoxy systems. However, the ether bonds in epoxy resin are easily broken by ultraviolet radiation. , leading to aging and powdering of the coating, making its performance unable to be guaranteed
[0005] Chinese Patent No.: CN103571329A discloses an insulating and anti-corrosion coating. The ceramic coating is composed of silicone resin, aluminum hydroxide, flame retardant, cermet particles, calcium sulfate, zinc oxide, silicon nitride, and deionized water. The particles need nano-scale materials, and the preparation cost is relatively good. At the same time, because its components contain more metal oxides, there is a risk of electrical conduction after long-term use, and the coating of this invention is brittle and easy to crack, and there are hidden dangers in long-term use.
Notification number CN103045058B discloses a kind of insulating paint and electrical steel material and preparation method thereof, and this paint has water-soluble film-forming resin, coupling agent etc. and has better heat resistance, insulation, adhesion, corrosion resistance and Punching performance, although a coupling agent is used, but the coupling agent is not pre-treated, so that the overall performance of the insulating coating is not good enough

Method used

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  • Extra-high voltage insulation coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] An ultra-high voltage insulating coating, comprising: 60 parts by weight of epoxy resin, 5 parts of talc powder, 6 parts of mica powder, 0.5 part of natural camphor, 0.12 parts of coupling agent, and 12 parts of nanometer filler Parts, solvent: 30 parts, blocked water-based cycloaliphatic polyisocyanate WB-903 curing agent: 0.4 parts, acrylate L-189 leveling agent: 2 parts, polyolefin wax anti-settling agent: 1 part and NXZ defoamer : 0.2 parts.

[0033] The mixing weight ratio of nano silicon nitride powder and nano magnesium hydroxide powder in the nano filler is 1:1.

[0034] Its preparation method is:

[0035] 1) Dissolve 0.12 parts by weight of aluminate coupling agent in 3 parts by weight of a solvent mixed with acetone and xylene at a volume ratio of 1:1, ultrasonicate for 10 minutes, and then add together with 12 parts by weight of nanofillers Put it into a high-speed disperser, stir at 380 rpm and raise the temperature to 80°C, stir for 30 minutes, and cool t...

Embodiment 2

[0040]An ultra-high voltage insulating coating, comprising: 80 parts by weight of epoxy resin, 8 parts of talc powder, 10 parts of mica powder, 5.5 parts of natural camphor, 0.54 parts of coupling agent, and 18 parts of nano fillers Parts, solvent: 45 parts, blocked water-based cycloaliphatic polyisocyanate WB-903 curing agent: 0.8 parts, acrylate L-189 leveling agent: 4 parts, polyolefin wax anti-settling agent: 2.5 parts and NXZ defoamer : 0.5 parts.

[0041] The mixing weight ratio of nano silicon nitride powder and nano magnesium hydroxide powder in the nano filler is 1:2.

[0042] Its preparation method is:

[0043] 1) Dissolve 0.54 parts by weight of aluminate coupling agent in 9 parts by weight of a solvent mixed with acetone and xylene at a volume ratio of 1.5:1, ultrasonicate for 20 minutes, and then add together with 18 parts by weight of nanofillers Put it into a high-speed disperser, stir at 460 rpm and raise the temperature to 100°C, stir for 40 minutes, and coo...

Embodiment 3

[0048] An ultra-high voltage insulating coating, comprising: 70 parts by weight of epoxy resin, 6 parts of talc powder, 8 parts of mica powder, 4.5 parts of natural camphor, 0.32 parts of coupling agent, and 16 parts of nano filler Parts, solvent: 40 parts, blocked water-based cycloaliphatic polyisocyanate WB-903 curing agent: 0.6 parts, acrylate L-189 leveling agent: 3 parts, polyolefin wax anti-settling agent: 2 parts and NXZ defoamer : 0.4 parts.

[0049] The mixing weight ratio of nano silicon nitride powder and nano magnesium hydroxide powder in the nano filler is 1:1.2.

[0050] Its preparation method is:

[0051] 1) Dissolve 0.32 parts by weight of aluminate coupling agent in 8 parts by weight of a solvent mixed with acetone and xylene at a volume ratio of 1.2:1, ultrasonicate for 15 minutes, and then add together with 16 parts by weight of nanofillers Put it into a high-speed disperser, stir at 420 rpm and raise the temperature to 90°C, stir for 40 minutes, cool to r...

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Abstract

The invention provides an extra-high voltage insulation coating and a preparation method thereof. The coating includes the following components by weight: 60-80 parts of epoxy resin, 5-8 parts of talcum powder, 6-10 parts of mica powder, 0.5-5.5 parts of natural camphor, 0.1-0.5 part of a coupling agent, 12-18 parts of nano filler, 30-45 parts of a solvent, 0.4-0.8 part of a curing agent, 2-4 parts of a leveling agent, 1-2.5 parts of an anti-settling agent and 0.2-0.5 part of a defoaming agent. The extra-high voltage insulation coating of the invention has the advantages of high mechanical properties, good electrical insulation, simple preparation process, and easily available raw materials.

Description

technical field [0001] The invention relates to a coating, in particular to an ultra-high voltage insulating coating and a preparation method thereof. Background technique [0002] In recent years, my country's electric power industry has developed rapidly, the operating voltage level of the power grid system has been continuously improved, and the network scale has gradually expanded. The major regional power grids have basically been integrated into a whole. accomplish. At present, the State Grid Corporation of China is promoting the development strategy of "one extra and four major" power grids, that is, relying on large-scale energy bases, constructing UHV power grids composed of 1000kV AC and ±800kV DC, forming a power "highway" and promoting large-scale coal production. Intensive development of electricity, large hydropower, large nuclear power and large renewable energy bases to achieve optimal allocation of resources across the country. [0003] The ultra-high or ul...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12C09D5/25C09D5/08
Inventor 张洪涛
Owner STATE GRID CORP OF CHINA
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