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Silicone rubber hydrophobic coating used for insulator and preparation method thereof

A hydrophobic coating, silicone rubber technology, applied in coatings, insulators, fire-retardant coatings, etc., can solve the problems of slow recovery of hydrophobicity, poor adhesion of hydrophobic coatings, poor hydrophobicity, etc., and achieve good adhesion and application range. Broad, excellent flame retardancy effect

Active Publication Date: 2016-06-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the anti-fouling flashover coatings generally have the problems of poor hydrophobicity and slow recovery of hydrophobicity. In addition, there is also the problem of poor adhesion of hydrophobic coatings on the surface of insulators.

Method used

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  • Silicone rubber hydrophobic coating used for insulator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 90~100g of halloysite nanotubes and 18~25g of perfluorooctyltriethoxysilane into 0.8~1.3L of ethanol aqueous solution with a mass concentration of 70%, stir in an oil bath at 80~100°C, Condensate and reflux, and react for 4 to 7 hours; after naturally cooling to room temperature, the above mixture is filtered, vacuum-dried, and pulverized to obtain halloysite nanotubes modified by perfluorooctyltriethoxysilane.

[0030] (2) 100 parts of hydroxyl-terminated polydimethylsiloxane with a molecular weight of 20,000, 150 parts of halloysite nanotubes modified by perfluorooctyltriethoxysilane, 6 parts of ethyl orthosilicate, 0.2 parts Dibutyl tin dilaurate and 100 parts of cyclohexane were mixed and stirred evenly at room temperature to form a viscous solution; the above viscous solution was coated on the surface of a silicone rubber composite insulator, and left to cure at room temperature for 24 hours. After the solvent evaporates naturally, a silicone rubber hydroph...

Embodiment 2

[0032] (1) Add 90-100g of halloysite nanotubes and 18-25g of heptadecafluorotrimethoxyethoxysilane into 0.8-1.3L of ethanol aqueous solution with a mass concentration of 70%, and stir in an oil bath at 80-100°C , condensed and refluxed, and reacted for 4 to 7 hours; after naturally cooling to room temperature, the above mixture was filtered, vacuum-dried, and pulverized to obtain halloysite nanotubes modified by heptadecafluorotrimethoxyethoxysilane.

[0033] (2) 100 parts of hydroxyl-terminated polydimethylsiloxane with a molecular weight of 15000, 180 parts of halloysite nanotubes modified by heptadecafluorotrimethoxyethoxysilane, 7 parts of ethyl orthosilicate, 0.3 1 part of dibutyltin dilaurate and 80 parts of cyclohexane, mixed and stirred evenly at room temperature to form a viscous solution; apply the above viscous solution on the surface of a silicone rubber composite insulator, and let it stand and cure for 24 hours at room temperature , after the solvent evaporates n...

Embodiment 3

[0035] (1) Add 90-100g of halloysite nanotubes and 18-25g of heptadecafluorodecyltrimethoxysilane into 0.8-1.3L of ethanol aqueous solution with a mass concentration of 70%, and stir in an oil bath at 80-100°C, Condensate and reflux, and react for 4 to 7 hours; after naturally cooling to room temperature, the above mixture is filtered, vacuum-dried, and pulverized to obtain halloysite nanotubes modified by heptadecafluorodecyltrimethoxysilane.

[0036] (2) 100 parts of hydroxyl-terminated polydimethylsiloxane with a molecular weight of 11000, 210 parts of halloysite nanotubes modified by heptadecafluorodecyltrimethoxysilane, 8 parts of ethyl orthosilicate, 0.4 parts Dibutyltin dilaurate and 60 parts of cyclohexane were mixed and stirred evenly at room temperature to form a viscous solution; the above viscous solution was coated on the surface of ceramic insulators, and left to solidify at room temperature for 24 hours. After natural volatilization, a silicone rubber hydrophobi...

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Abstract

The invention belongs to the technical field of coatings, and particularly discloses a silicone rubber hydrophobic coating used for an insulator and a preparation method thereof. The silicone rubber hydrophobic coating comprises hydroxy-terminated poly-dimethylsiloxane, fluoroalkyl silane modified halloysite nanotubes, tetraethyl orthosilicate, dibutyltin dilaurate and cyclohexane; the preparation method comprises the steps of mixing all the components for stirring uniformly at room temperature to prepare a viscous solution, then coating the surface of a composite insulator with the viscous solution, leaving to stand for curing at room temperature, so as to obtain the silicone rubber hydrophobic coating after the solvent naturally volatiles. The silicone rubber hydrophobic coating used for the insulator, provided by the invention, has the advantages that the preparation process is simple, the hydrophobic nature is good, the adhesive force is strong, the fire resistance is good, and the using requirements of an insulator on the external insulating coating material are met.

Description

technical field [0001] The invention relates to a silicone rubber hydrophobic coating used for insulators and a preparation method thereof, belonging to the technical field of coatings. Background technique [0002] Insulators operating outdoors are subject to contamination such as dust, smoke and industrial emissions, forming a foul layer on the surface. Polluted insulators flashover along the surface under the action of voltage, referred to as pollution flashover, and its flashover voltage is referred to as pollution flashover voltage. In a dry state, the flashover voltage of an insulator is not greatly affected by surface pollution, but under fog, dew, snow, rain and other climatic conditions, the dirty layer on the surface of the insulator is damp, and its flashover voltage is greatly reduced, resulting in pollution flashover The occurrence of accidents, even pollution flashover accidents will occur under the working voltage. The impact of pollution flashover on the po...

Claims

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Application Information

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IPC IPC(8): C09D183/06C09D5/18C09D5/25C09D7/12
CPCC08K5/5415C08K5/57C08K7/26C08K9/06C08K13/06C08K2201/011C09D5/18C09D7/62C09D7/63C09D183/06H01B3/308
Inventor 林俊马洪飞何少剑郏慧娜林彦楷李春雷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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