Hydrophobic coating, preparation method thereof, antenna housing and antenna system

Abstract

The invention discloses a hydrophobic coating. The hydrophobic coating comprises, by mass, from 25 to 45% of teflon resin emulsion, from 5 to 35% of titanium dioxide, from 10 to 40% of water and from 5 to 20% of additive. The additive comprises, by mass, from 0.3 to 0.7% of wetting agent, from 0.3 to 1% of dispersing agent, from 2 to 6% of antifreezing agent, from 0.1 to 0.6% of thickener, from 2 to 10% of coalescing agent, from 0.1 to 0.7% of defoaming agent and from 0.2 to 0.5% of bactericide. The coating can effectively avoid snow accumulation and freezing generated on the surface of an article under sleet and cold weather conditions. The invention further discloses a preparation method of the hydrophobic coating. The preparation method is simple and pollution-free, and the hydrophobic coating can be applied to an antenna housing and an antenna system and has an excellent development prospect.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a hydrophobic coating and a preparation method thereof. Background technique [0002] A radome is a structure that protects an antenna system from the external environment. The radome should have good electromagnetic radiation penetration performance electrically, and have good selectivity to electromagnetic waves of different frequency bands. The radome usually works in an open-air environment and is directly exposed to storms, ice, snow, sand and the sun in nature. Invasion of radiation, etc., which reduces the accuracy of the antenna and shortens its life, so the structure of the radome should be able to withstand the invasion of the harsh environment of nature. The existing radome has high dielectric constant, large dielectric loss, and poor matching with air. In rainy, snowy and cold weather conditions, water, snow and ice will appear on the surface of the radome. The rain, ice and...

AI Technical Summary

Problems solved by technology

The radome should have good electromagnetic radiation penetration performance electrically, and have good selectivity to electromagnetic waves of different frequency bands. The radome usually works in an open-air environment and is directly exposed to storms, ice, snow, sand and the sun in nature. The invasion of radiation, etc., which reduces the accuracy of the antenna and shortens its life, so the structure of the radome should be able to withstand the invasion of the harsh environment of nature

The existing radome has high dielectric constant, large dielectric loss, and poor matching with air

In rainy, snowy and cold weather conditions, water, snow and ice will appear on the surface of the radome, and the rain, ice and snow covered on the radome will absorb and reflect the electromagnetic waves radiated to the line, changing the antenna in free space. The energy distribution of the antenna affects the electrical performance of the antenna

[0003] The currently disclosed coating materials are mainly flexible materials, and the ability of the coating material to prevent water accumulation, snow accumulation and anti-icing is not mentioned. It also discloses an anti-ice and snow radome, and its technical solution is to arrange on the radome The resistance element is coated with a heat-conducting coating on the resistance element. After power-on, the current flows through the resistance element, and the resistance element releases heat. The heat is transferred to the surface of the coating through the heat-conducting coating, and the ice and snow melt when heated. This technical solution has complicated process and relatively high cost. High, not suitable for large-scale industrial production

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