Composition for anti-pollution flashover coating and anti-pollution flashover coating

Abstract

The invention provides a composition for an anti-pollution flashover coating and the anti-pollution flashover coating. The composition comprises the following components in part by weight: 25 to 40 parts of hydroxyl-terminated polyorganosiloxane, 5 to 15 parts of hydroxyl-terminated fluorine-containing polyorganosiloxane, 6.0 to 8.0 parts of nanometre silicon dioxide, 2.5 to 3.5 parts of nanometre calcium carbonate, 4.8 to 5.5 parts of cross-linking agent, 3.5 to 4.5 parts of wetting agent, 0.8 to 1.3 parts of silane coupling agent and 0.2 to 0.4 part of catalyst. The coating has the characteristic of long-term anti-pollution flashover effect and greatly improves the hydrophobicity, the hydrophobicity migration property, the tear strength, the shear strength, the acid and alkali resistance, the self-cleaning property and the aging property of a coating. The performance indexes of the coating are designed according to the actual needs of operation of electric equipment and by combining the development level of an organic silicon fluorine material. Requirements and limitations on the operation and maintenance of the equipment operating can be reduced to the maximum degree on the premise of guaranteeing the long-term anti-pollution flashover performance of the equipment.

Description

technical field [0001] The invention relates to a composition for antifouling flashover coatings and the antifouling flashover coatings, in particular to a composition for antifouling flashover coatings modified with fluorine-containing polysiloxane and the antifouling flashover coatings. 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 number one ...

AI Technical Summary

Problems solved by technology

Due to the excellent elasticity and soft surface of silicone rubber and the good electrical insulation of silicone rubber, dust is easy to accumulate on the surface of RTV. Although RTV has good hydrophobic mobility, when the loose dirt reaches a certain thickness, the dirty inside will It is easy to form water flow channels and large-area stagnation areas, which may eventually form flashover channels, leading to pollution flashover accidents

(3) aging

However, the atmospheric aging performance of RTV cannot be significantly improved by adding conventional inorganic fillers.

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