Self-cleaning anti-pollution flashover coatings and preparation method thereof

An anti-fouling flashover coating and self-cleaning technology, applied in coatings and other directions, can solve the problems of poor self-cleaning effect of RTV coatings, achieve enhanced hydrophobicity and anti-adhesion, easy dispersion, and little impact on mechanical and chemical properties Effect

Active Publication Date: 2013-06-05
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is the poor self-cleaning effect of RTV

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The self-cleaning anti-fouling flashover coating described in this example is prepared from the following components by weight: 25 parts of hydroxyl-terminated polysiloxane, 3 parts of nano-silica, 12 parts of aluminum hydroxide modified flame retardant 2.5 parts of micron matting powder, 0.1 part of pigment, 1.5 parts of ketoxime type crosslinking agent, 0.001 part of deoximation type catalyst, and 40 parts of alkane solvent. The viscosity of the hydroxyl-terminated polysiloxane is 4000-30000 mPa.s.

[0080] The self-cleaning antifouling flashover coating is prepared by the following method:

[0081] (1) Add the hydroxyl-terminated polysiloxane, nano-silicon dioxide, pigment and aluminum hydroxide modified flame retardant into the primary mixer in selected parts by weight and mix uniformly for 1 hour, then grind uniformly by three rollers, And put it into a kneader, under vacuum conditions, control the temperature at 150°C, after the low molecular substances are remov...

Embodiment 2

[0088] The self-cleaning antifouling flashover coating described in this embodiment is prepared from the following components by weight: 40 parts of hydroxyl-terminated polydimethylsiloxane, 6 parts of hydrophobic fumed nano-silica, hydrotalcite modified 20 parts of non-toxic flame retardant, 4 parts of micron matting powder, 2 parts of pigment, 3 parts of ketoxime type crosslinking agent methyl tributylketoxime silane, 0.1 part of dibutyltin silicate in deoximation type catalyst, polyether 70 parts of solvent. The viscosity of the hydroxyl-terminated polydimethylsiloxane is 4000-30000 mPa.s.

[0089] The self-cleaning antifouling flashover coating is prepared by the following method:

[0090] (1) Add the hydroxyl-terminated polydimethylsiloxane, hydrophobic fumed nano-silica, pigment and magnesium hydroxide modified flame retardant into the initial mixer for 1 hour and mix uniformly in selected parts by weight, then Grind evenly through three rollers, put it into a kneader,...

Embodiment 3

[0097] The self-cleaning anti-fouling flashover coating described in this embodiment is prepared from the following components by weight: 30 parts of hydroxyl-terminated polydimethylsiloxane, 4 parts of hydrophobic fumed nano-silica, aluminum hydroxide 16 parts of modified flame retardant, 3 parts of micron matting powder, 0.6 parts of pigment, 2 parts of ketoxime type crosslinking agent vinyl butanone oximino silane, 0.01 part of deoximation catalyst stannous octoate, a mixture of aromatic hydrocarbons and alkanes 50 parts of solvent. The viscosity of the hydroxyl-terminated polydimethylsiloxane is 5000-25000 mPa.s.

[0098] The self-cleaning antifouling flashover coating is prepared by the following method:

[0099] (1) Add the hydroxyl-terminated polydimethylsiloxane, hydrophobic fumed nano-silica, pigment and aluminum hydroxide modified flame retardant into the primary mixer for 1 hour and mix uniformly in selected parts by weight, then Grind evenly through three rollers...

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Abstract

The invention belong to the technical field of chemical coatings, and relates to anti-pollution flashover coatings for electrical equipment, in particular to the anti-pollution flashover coatings which can achieve a self-cleaning effect, and a preparation method thereof. The self-cleaning anti-pollution flashover coatings are prepared by end hydroxyl polysiloxane, white carbon black, modified flame retardants, micron extinction powder, pigment, crosslinking agents, catalysts and solvents according to designated weight portions. Through adding of micron particles and nano-silica on the surface structure of the self-cleaning anti-pollution flashover coatings to form a roughened surface provided with a micron-nanometer structure, namely, the micron-nanometer structure with the surface similar to lotus effects, so that the actual contact area of solid-liquid phase of the outer surface of the coatings is larger than the observed area on an apparent geometry. The hydrophobicity and adhesive attraction resistant action of the coatings are greatly enhanced, the coatings can have a self-cleaning ability, and anti-pollution flashover effects are greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, and in particular relates to an antifouling flashover coating for electric equipment, in particular to an antifouling flashover coating capable of realizing self-cleaning effect and a preparation method thereof. Background technique [0002] Pollution flashover refers to the fact that the soluble substances of the dirt attached to the insulating surface of electrical equipment gradually dissolve in water under humid conditions, forming a conductive film on the insulating surface, greatly reducing the insulation level of the insulator, and appearing under the action of the electric field Phenomenon of strong discharge. Due to the widespread adoption of EHV transmission and DC transmission technologies in the power system, pollution flashover has become a catastrophic failure that seriously threatens the safe operation of equipment and power grids in the power system, and is listed as the...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D183/06
Inventor 王建辉夏兵王国刚
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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