Hydrophobic repair coating for silicone rubber composite insulator and preparation method of hydrophobic repair coating

A technology for composite insulators and repair coatings, applied in the direction of coatings, etc., can solve the problems of attenuation of hydrophobicity of insulator sheds, easy storage of water vapor and harmful substances, rough surface of insulators, etc., and achieve high coating bonding strength, low surface energy, super hydrophobic effect

Inactive Publication Date: 2019-07-09
北京国铁研创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wiping the surface of the insulator shed many times is likely to cause the attenuation and loss of the hydrophobicity of the insulator shed, making the surface of the insulator rough, and it is easier to store water vapor and various harmful substances, plus the aging of the insulator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A hydrophobic repair coating for silicone rubber composite insulators, comprising the following raw materials in parts by weight: 80 kg of room temperature vulcanized silicone rubber, 10 kg of fluorosilicone rubber, 0.3 kg of coupling agent, 3 kg of white carbon black, 0.5 kg of dispersant, and 0.3 kg of leveling agent kg, antioxidant 1kg, dimethyl adipate 100kg, iron oxide red 2kg, polydimethylsiloxane 30kg.

[0033] The preparation method of the hydrophobic repair coating for the silicone rubber composite insulator comprises the following steps:

[0034] (1) dry white carbon black, for subsequent use;

[0035] (2) Add the dried white carbon black to dimethyl adipate and mix and stir evenly to obtain a mixed solution;

[0036] (3) Add room temperature vulcanized silicone rubber, fluorosilicone rubber, coupling agent, dispersant, leveling agent and antioxidant into the mixed solution in sequence, mix and stir evenly; then add iron oxide red, polydimethylsiloxane , und...

Embodiment 2

[0038] A hydrophobic repair coating for silicone rubber composite insulators, including the following raw materials in parts by weight: room temperature vulcanized silicone rubber 80kg, fluorosilicone rubber 10kg, silane coupling agent kh550 0.3kg, white carbon black 3kg, dispersant BYK-141 0.5kg , Leveling agent BYK-399 0.3kg, antioxidant 1010 1kg, dimethyl adipate 100kg, iron oxide red 2kg, silicone oil 30kg.

[0039] The preparation method of the hydrophobic repair coating for the silicone rubber composite insulator comprises the following steps:

[0040] (1) Dry the white carbon black in a drying oven at a temperature of 100°C for 46 hours, and set aside;

[0041] (2) Add the dried white carbon black to dimethyl adipate and mix and stir evenly under the condition that the stirring speed is 2000rpm to obtain a mixed solution;

[0042](3) Add room temperature vulcanized silicone rubber, fluorosilicone rubber, coupling agent, dispersant, leveling agent and antioxidant to the...

Embodiment 3

[0044] A hydrophobic repair coating for silicone rubber composite insulators, including the following raw materials in parts by weight: room temperature vulcanized silicone rubber 85kg, fluorosilicone rubber 15kg, silane coupling agent kh550 0.5kg, white carbon black 5kg, dispersant BYK-141 0.7kg , Leveling agent BYK-399 0.5kg, antioxidant 1010 2kg, dimethyl adipate 110kg, iron oxide red 2.5kg, polydimethylsiloxane 35kg.

[0045] The preparation method of the hydrophobic repair coating for the silicone rubber composite insulator comprises the following steps:

[0046] (1) Dry the white carbon black in a drying oven at a temperature of 105° C. for 48 hours, and set aside;

[0047] (2) Add the dried white carbon black to dimethyl adipate and mix and stir evenly under the condition that the stirring speed is 3000rpm to obtain a mixed solution;

[0048] (3) Add room temperature vulcanized silicone rubber, fluorosilicone rubber, coupling agent, dispersant, leveling agent and antio...

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PUM

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Abstract

The invention discloses a hydrophobic repair coating for a silicone rubber composite insulator and a preparation method of the hydrophobic repair coating. The hydrophobic repair coating for the silicone rubber composite insulator comprises the following raw materials: room temperature vulcanized silicone rubber, fluorosilicone rubber, a coupling agent, white carbon black, a dispersing agent, a flatting agent, an antioxidant, dimethyl adipate, iron oxide red, polydimethylsiloxane and / or silicone oil. The hydrophobic repair coating has the beneficial effects that the fluorine-containing siliconerubber is used for modifying the room temperature vulcanized silicone rubber; due to introduction of organic fluorine, the surface energy of the material is reduced; and meanwhile, a silane couplingagent is adopted for carrying out surface modification on used hydrophilic inorganic filler, so that hydrophobicity of the material is further enhanced. The coating after spraying has the advantages that the surface is smooth and flat and the coating surface is fine, hydrophobicity of the composite insulator after spraying can reach or even exceed the effect of the composite insulator during delivery, bonding strength of a coating layer is high, and an insulator umbrella skirt does not need to be wiped during one-year operation of a locomotive vehicle.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a hydrophobic repair coating for silicone rubber composite insulators and a preparation method thereof. Background technique [0002] Silicone rubber is an excellent anti-pollution flashover material for external electrical insulation. It has high dielectric strength, hydrophobicity and water-repellent mobility. Attaching it to the porcelain or glass surface of the insulator can greatly increase the pollution flashover voltage of the insulator In the industry, this kind of insulator with silicone rubber coating is called composite insulator or composite insulator. [0003] Silicone rubber composite insulators are hydrophobic when they leave the factory. However, in recent years, due to the smog weather that often occurs in many places in China, composite insulators are usually exposed outdoors. The air contains a lot of water vapor, dust and harmful gases. These substances are o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/08C09D7/61C09D7/63
CPCC08L2205/025C09D7/61C09D7/63C09D183/04C08L83/08C08L83/04C08K3/36C08K5/544
Inventor 成凤麒蔡梦霖曾小方
Owner 北京国铁研创科技有限公司
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