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

A hydrophobic, radome technology, applied in antifouling/underwater coatings, antennas, coatings, etc., can solve the problems of large dielectric loss, complex process, affecting the electrical performance of the antenna, avoid snow accumulation, and simple process , the effect of good development prospects

Active Publication Date: 2012-11-07
KUANG CHI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

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Effect test

preparation example Construction

[0025] Such as figure 1 As shown in the flow chart of the preparation method of the hydrophobic coating of the present invention, the preparation method of the above-mentioned hydrophobic coating comprises the following steps:

[0026] Step 1. Mix water, dispersant, wetting agent, antifreeze and part of defoamer and stir at low speed to obtain a uniform mixture.

[0027] Step 2: Add rutile titanium dioxide and part of the thickener to the mixture obtained in Step 1, disperse and grind at a high speed to obtain a uniform slurry.

[0028] Step 3: Add tetrafluororesin emulsion, film-forming aid, bactericide, remaining thickener and remaining defoamer to the slurry obtained in Step 2, stir at a medium speed, and mix evenly to obtain a hydrophobic coating.

[0029] Low-speed stirring in the above preparation method means that the rotating speed of the stirring blade is between 500 rpm-800 rpm, high-speed stirring means that the rotating speed of the stirring blade is between 1500 ...

Embodiment 1

[0036] Hydrophobic coating, its formulation ratio is:

[0037] name

Content (mass percentage)

name

Content (mass percentage 0

PTFE emulsion

45

Rutile Titanium Dioxide

27.2

Deionized water

10

TRITON TM X-405

0.3

Acrylic acid sodium salt dispersant

0.3

Propylene Glycol

6

Hydrophobic Modified Alkali Swellable Emulsion

0.3

dodecyl alcohol

10

Silicone defoamer

0.7

Isothiazolinone fungicides

0.2

[0038] Step 1. Add 10% of deionized water, 0.3% of acrylic acid sodium salt dispersant, 0.3% of TRITONTM X-405 wetting agent, 6% of propylene glycol and 0.3% of silicone defoamer in order according to the above mass, mix and stir for 10 minutes at low speed to obtain Mix well.

[0039] Step 2: Add 27.2% rutile titanium dioxide and 0.2% hydrophobically modified alkali-swellable emulsion to the mixture obtained in step 1, disperse and grind at hig...

Embodiment 2

[0043] Hydrophobic coating, its formulation ratio is:

[0044]

[0045] Step 1. Add 20% deionized water, 1% acrylic acid sodium salt dispersant, TRITON TM Mix 0.7% X-405 wetting agent, 2% propylene glycol and 0.05% silicone defoamer and stir at low speed for 5 minutes to obtain a homogeneous mixture.

[0046] Step 2: Add 35% rutile titanium dioxide and 0.3% non-ionic hydrophobically modified ethylene oxide polyurethane copolymer to the mixture obtained in step 1, disperse and grind at high speed for 30 minutes to obtain a uniform slurry.

[0047] Step 3. Add 38.1% of tetrafluororesin emulsion, 2% of dodecyl alcohol, 0.5% of isothiazolinone fungicide, 0.3% of non-ionic hydrophobic modified ethylene oxide polyurethane copolymer, and silicone defoamer Add 0.05% to the above homogeneous slurry, stir for 20 minutes at a medium speed, and get a hydrophobic coating after mixing evenly.

[0048] The hydrophobic coating of the invention can be coated on the surface of the radome,...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/12C09D5/14H01Q1/42H01Q15/02
Inventor 刘若鹏赵治亚法布里齐亚·盖佐朱能波金晶
Owner KUANG CHI INST OF ADVANCED TECH
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