Anti-pollution flashover normal-temperature cured fluorocarbon resin coating and preparation method thereof

Abstract

The invention discloses a normal-temperature cured fluorocarbon resin coating, which consists of the following components in percentage by weight: 35 to 70 percent of tetrafluorochloroethylene-vinyl ester polymer, 5.5 to 12 percent of curing agent, 2 to 10 percent of coupling agent, 1 to 10 percent of pigment, 1 to 30 percent of hydrophobic particles, 0.03 to 3 percent of aid, 20 to 40 percent ofsolvent and 0.001 to 1 percent of catalyst, wherein the coupling agent is fluorosilane with a -CF3 group and a -CF2 group; the aid is a flatting agent, an antifoaming agent and a dispersing agent; the solvent is butyl acetate and methyl isobutyl ketone; the catalyst is dibutyltin dilaurate; and the curing agent is aliphatic diisocyanate. By adopting a specific coating formula, due to the combinedaction of the fluorosilane coupling agent and the hydrophobic particles, the anti-pollution flashover fluorocarbon resin coating has a static contact angle theta of 120 degrees, is excellent in hydrophobic performance and hydrophobic migration property, high in anti-pollution flashover performance, high in coating leveling property, smooth in surface, and high in self-cleanliness, chemicals resistance and hot-water resistance, and has an adhesive force reaching a zero level.

Description

technical field [0001] The invention belongs to the paint industry, in particular, the invention relates to an antifouling flashover normal temperature curing fluorocarbon resin paint and a preparation method thereof. Background technique [0002] Porcelain insulators are important accessories in high-voltage power transmission and transformation equipment. With the rapid development of industry, the rapid increase of power transmission capacity, and the continuous improvement of the voltage level of power transmission and transformation equipment, pollution flashover accidents of power system insulators have become increasingly prominent. Among them, the pollution flash is due to the fact that the glazed surface of the porcelain bottle is very good, has good hydrophilicity, and is easy to accumulate some dirty substances with conductive properties. After being damp in humid weather, these dirt will form a conductive film on the surface, so that The insulation level of the i...

AI Technical Summary

Problems solved by technology

Traditional anti-pollution flashover coatings include silicone oil, silicone grease, ozokerite, etc. Among them, silicone oil has a short service life, and silicone grease is greasy for a long time, especially after it is attached to dirty substances to form a sludge layer, which is not convenient for daily prevention Performance test and maintenance work, ozokerite is not suitable for dust-contaminated areas, and the price of silicone oil and silicone grease is high, the service life is short, only 3-6 months, and it is difficult to clean up after failure

In the mid-to-late 1980s, a new type of anti-pollution flashover coating-RTV coating appeared. Ozone, maintenance-free and other advantages, but this product has the following disadvantages: the material of the coating itself is soft, easy to be contaminated with dirty substances, and difficult to clean. After a period of operation, the dust attached to the surface of the RTV coating will increase and the dirty layer will thicken , the migration speed of the small molecules of the paint itself also slows down, making the hydrophobic effect worse and worse, and finally leading to a significant decrease in the anti-fouling flashover performance