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Improved anti-pollution flashover coating and preparation method thereof

An anti-pollution flashover coating and an improved technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of reduced surface energy, strong adhesion, and difficult to remove, and achieve the effects of reduced adhesion, rapid detachment, and reduced impact.

Active Publication Date: 2021-07-16
河北诚和龙盛电力工程有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when RTV coatings are applied to the surface of power equipment, under special conditions, such as spring and autumn in the north and central my country in winter, frost or freezing rain is prone to occur, although the surface of the insulator is coated with anti-pollution flashover coating, but ice and frost will still cover its surface, thereby reducing creepage distance or increasing conductive channels, causing breakdown accidents
[0003] At present, the main film-forming material of anti-fouling flashover coatings is silicone rubber. This material has certain hydrophobic self-cleaning properties, but from the actual use effect, its hydrophobicity is far from being able to meet long-term and special conditions. Therefore, patent documents CN106543895A, CN101870847A, CN101597463A and other patents propose to introduce fluorine-containing substances into the traditional anti-fouling flashover coating formula to further reduce its surface energy and increase hydrophobicity
But still can't solve the problem of its surface covered with ice
Patent document CN103131240A discloses a self-cleaning anti-fouling flashover coating, which is a good way to construct a bionic lotus leaf micro-nano composite surface, using the super-hydrophobic principle to achieve the effect of hydrophobic self-cleaning, but the roughness Once the surface begins to be covered with ice, compared with the smooth surface of ordinary anti-fouling flashover coatings, the contact area with ice is larger, the ice has stronger adhesion and is more difficult to remove, and the ice-water mixture has a longer-lasting influence on the insulation effect

Method used

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  • Improved anti-pollution flashover coating and preparation method thereof

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preparation example Construction

[0035] In addition, the present invention also discloses a preparation method of an improved antifouling flashover coating, comprising the following steps:

[0036] 1) According to the formulation requirements of the above-mentioned improved anti-pollution flashover coating, configure the mixed solvent;

[0037] 2) Add the formula amount of hydroxyl-terminated polydimethylsiloxane into the kneader, stir evenly at a speed of 40-60rpm, then add white carbon black, aluminum hydroxide, alumina microspheres, decabromodiphenyl For ether and pigments, adjust the rotation speed to 80-120rpm; after heating to 80-120°C, turn on the vacuum to remove air bubbles and small molecular substances, and maintain the rotation speed at 80-120rpm for 1.5-2h to make the materials in the kneader evenly mixed;

[0038] 3) After the material obtained in step 2) is cooled to room temperature, it is transferred to a three-roll machine for grinding until the grinding fineness of the material is below 20 ...

Embodiment 1

[0041] The preparation of the improved type antifouling flashover coating provided by the present invention comprises the steps:

[0042] 1) Mix the solvent No. 120 gasoline, ethyl acetate, methylene chloride and xylene in a mixing tank according to the mass ratio of 3:0.5:0.3:1 to obtain the mixed solvent in this application for subsequent use;

[0043] 2) Add 100 parts of low-viscosity hydroxyl-terminated polydimethylsiloxane and high-viscosity hydroxyl-terminated polydimethylsiloxane with a mass ratio of 2:1 into the kneader, stir evenly at a speed of 40 rpm, and then Add 10 parts of white carbon black, 30 parts of aluminum hydroxide with a particle size of 5-30 μm, 25 parts of alumina microspheres with a particle size of 15-45 μm, 18 parts of decabromodiphenyl ether and 5 parts of pigment, and adjust the rotation speed to 80 rpm; heat After reaching 80°C, turn on the vacuum to remove air bubbles and small molecular substances, and maintain it for 1.5-2 hours at a rotation ...

Embodiment 2

[0049] The preparation of the improved type antifouling flashover coating provided by the present invention comprises the steps:

[0050] 1) Mix the solvent No. 120 gasoline, ethyl acetate, methylene chloride and xylene in a mixing tank according to the mass ratio of 3:0.2:0.5:1 to obtain the mixed solvent in this application and set aside;

[0051] 2) Add 100 parts of low-viscosity hydroxyl-terminated polydimethylsiloxane and high-viscosity hydroxyl-terminated polydimethylsiloxane with a mass ratio of 3:1 into the kneader, stir evenly at a speed of 40 rpm, and then Add 15 parts of white carbon black, 45 parts of aluminum hydroxide with a particle size of 15 μm, 30 parts of alumina microspheres with a particle size of 30 μm, 20 parts of decabromodiphenyl ether and 6 parts of pigment, and adjust the rotation speed to 100 rpm; after heating to 100 ° C , turn on the vacuum to remove air bubbles and small molecular substances, and maintain it for 1.5-2 hours at a speed of 100rpm, ...

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Abstract

The invention discloses an improved anti-pollution flashover coating, which is prepared from the following ingredients in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10 to 20 parts of white carbon black, 15 to 50 parts of aluminum hydroxide, 20 to 50 parts of aluminum oxide microspheres, 15 to 30 parts of decabromodiphenyl ether, 5 to 10 parts of pigments, 200 to 300 parts of mixed solvents, 1 to 5 parts of silane coupling agents, 1 to 10 parts of cross-linking agents, 0.5 to 5 parts of catalysts and 5 to 20 parts of lubricating agents. The invention also discloses a preparation method of the improved anti-pollution flashover coating. According to the improved anti-pollution flashover coating disclosed by the invention, aluminum hydroxide and aluminum oxide microspheres with different particle sizes are compounded, and the lubricant is matched, so that the improved anti-pollution flashover coating can greatly reduce the adhesive force of covering ice on the surface of equipment; when the surface of equipment operating outdoors is iced, compared with a traditional anti-pollution flashover coating, the anti-pollution flashover coating can enable ice to fall off more quickly, so that the influence of frost on the operating equipment is reduced.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an improved antifouling flashover coating and a preparation method thereof. Background technique [0002] The power industry is a major industry that involves the national economy and the people's livelihood, and the safe and stable operation of the power system is the basic guarantee for Guotai Minan. With the development of modern industry, environmental pollution is becoming more and more serious, and the content of various dusts in the atmosphere is gradually increasing, and the dust gradually gathers on the surface of the insulator, and the dust will be wetted in harsh environments such as dense fog, rain, snow, frost, etc., so that the insulating ability of the insulator The leakage current increases sharply under the action of operating voltage, so that arc discharge occurs and pollution flashover accidents occur. At present, the most effective method of anti...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/18C09D5/25C09D7/61C09D7/65
CPCC09D183/04C09D5/18C09D5/00C09D7/61C09D7/65C09D7/70C08K2201/014C08K2201/003C08K2003/2227C08L2205/035C08L2205/025C08L83/04C08L83/08C08K7/26C08K3/22C08K13/04
Inventor 车千里陈浩刘昕王峰张意飞骆川
Owner 河北诚和龙盛电力工程有限公司
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