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Self-healing anti-pollution flashover coating as well as preparation method and application thereof

An anti-pollution flashover coating and self-healing technology, applied in coatings and other directions, can solve the problems of unstable anti-pollution flashover performance, mechanical wear of coatings, electrical equipment failures, etc., and achieve improved anti-pollution flashover performance and excellent coatings. Service life, the effect of prolonging the service life

Active Publication Date: 2022-01-14
GUANGDONG POWER GRID CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since anti-fouling flashover coatings are generally used outdoors, sandstorms and scratches may cause mechanical wear of the coating, leading to coating failure and electrical equipment failure; It leads to unstable anti-pollution flashover performance, and it is not enough to simply increase the static water contact angle of the coating

Method used

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  • Self-healing anti-pollution flashover coating as well as preparation method and application thereof
  • Self-healing anti-pollution flashover coating as well as preparation method and application thereof
  • Self-healing anti-pollution flashover coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A self-healing antifouling flashover coating comprising diamine-containing polydimethylsilane (CAS No.: 106214-84-0, molecular weight 3000), 1,3,3-trimethyl-5-isocyanato -A combination of 1-isocyanatomethylcyclohexane and polydimethylsilane (CAS No.: 63148-62-9, 100cSt / 25°C); among them, diamine-containing polydimethylsilane and 1,3 , The molar ratio of 3-trimethyl-5-isocyanato-1-isocyanatomethylcyclohexane is 1:1, the mass ratio of diamine-containing polydimethylsilane and polydimethylsilane 1:1;

[0035]The preparation method of the self-healing antifouling flashover coating provided in this embodiment comprises: polydimethylsilane, 1,3,3-trimethyl-5-isocyanato-1-isocyanatomethylcyclohexyl Alkane and polydimethylsilane were dissolved in tetrahydrofuran and reacted for 50 hours to obtain the tetrahydrofuran.

Embodiment 2

[0037] A self-healing antifouling flashover coating comprising diamine-containing polydimethylsilane (CAS No.: 106214-84-0, molecular weight 3000), 4,4'-methylenebis(phenylisocyanate) and poly(dimethylsiloxane-co-methylphenylsiloxane) (CAS No.: 63148-58-3, ~100mPa.s / 25°C); among them, diamine-containing polydimethylsilane and 4,4′-Methylenebis(phenylisocyanate) in a molar ratio of 1:0.98, diamine-containing polydimethylsilane and poly(dimethylsiloxane-co-methylphenylsiloxane The mass ratio of alkane) is 1:2.5;

[0038] The preparation method of the self-healing antifouling flashover coating provided in this embodiment comprises: polydimethylsilane, 4,4'-methylenebis(phenylisocyanate) and poly(dimethylsiloxane- co-methylphenylsiloxane) was dissolved in tetrahydrofuran and reacted for 48 hours to obtain the tetrahydrofuran.

Embodiment 3

[0040] A self-healing antifouling flashover coating, comprising diamine-containing polydimethylsilane (CAS No.: 106214-84-0, molecular weight 5000), 4,4'-HMDI, 1,1'-methylene bis( 4-isocyanatocyclohexane) and poly(dimethylsiloxane-co-methylphenylsiloxane) (CAS No.: 63148-58-3, ~100mPa.s / 25°C); among them, The molar ratio of diamine-containing polydimethylsilane to 4,4'-HMDI, 1,1'-methylenebis(4-isocyanatocyclohexane) is 1:1.05, and the diamine-containing polydimethylsilane The molar ratio of methylsilane and poly(dimethylsiloxane-co-methylphenylsiloxane) is 1:5;

[0041] The preparation method of the self-healing anti-fouling flashover coating provided in this embodiment comprises: polydimethylsilane, 4,4'-HMDI, 1,1'-methylenebis(4-isocyanatocyclohexane) and poly(dimethylsiloxane-co-methylphenylsiloxane) were dissolved in tetrahydrofuran, and reacted for 72 hours to obtain the tetrahydrofuran.

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Abstract

The invention provides a self-healing anti-pollution flashover coating as well as a preparation method and application thereof. The self-healing anti-pollution flashover coating comprises a combination of diamine-containing polydimethylsilane, a dinitrile monomer and a lubricant, diamine-containing polydimethylsilane is added as substrate molecules, dinitrile monomers are added in a matched mode, the two molecules react to obtain high molecules containing hydrogen bond sites, and hydrogen bonds can be formed between molecular chains and in the molecular chains of the high molecules, so that after a coating formed by the self-healing anti-pollution flashover coating is damaged, the molecular chain of the coating at the damaged position can move and form a new hydrogen bond again, and the damage is repaired; meanwhile, the lubricant is added, so that the coating can prevent pollutants and water drops from adhering, and the anti-pollution flashover coating with high coating stability and self-healing performance is finally obtained.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a self-healing antifouling flashover coating and a preparation method and application thereof. Background technique [0002] Insulators are an integral part of power systems, and their surfaces are prone to form a continuous conductive film with dirt in humid and harsh environments such as fog, rain, sea fog, smog or snow, and then strong discharges occur Phenomenon, leading to damage to electrical equipment, seriously affecting the safe and stable operation of the power system, resulting in huge economic losses. [0003] The surface treatment method can change the wetting state of the insulator surface, effectively avoid the formation of continuous water film, thereby avoiding the formation of leakage current channels; at present, the anti-fouling flashover of the power grid system mainly uses room temperature vulcanized anti-fouling flashover silicone rubber coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D7/65C08G77/388
CPCC09D183/08C09D7/65C08G77/388C08L83/04
Inventor 陈哲韩林征波阮晓哲陈蔚东刘盛浩方祖耀曾庆炀
Owner GUANGDONG POWER GRID CO LTD
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