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Anti-corrosion wave-absorbing coating and preparation method thereof

A wave-absorbing coating and anti-corrosion technology, applied in anti-corrosion coatings, coatings, radiation-absorbing coatings, etc., can solve problems such as insufficient corrosion resistance, and achieve the effect of improving poor corrosion resistance, good compatibility, and wide source of raw materials

Active Publication Date: 2018-04-10
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide an anti-corrosion wave-absorbing coating, which has the characteristics of strong wave-absorbing ability and excellent corrosion resistance, which can solve the problem of insufficient corrosion resistance of existing wave-absorbing coatings, and improve wave-absorbing properties. Coating weather resistance and service life

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  • Anti-corrosion wave-absorbing coating and preparation method thereof
  • Anti-corrosion wave-absorbing coating and preparation method thereof

Examples

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preparation example Construction

[0025] Further, the preparation method of the wave-absorbing coating comprises:

[0026] Mix the matrix resin, dispersant, anti-sedimentation agent and diluent according to the mass percentage, stir at a speed of 1000-1200rmp for 20-40min, then add the absorbent, continue stirring for 20-40min, then add the curing agent, Stir for 3 to 10 minutes.

[0027] The wave-absorbing layer prepared by the above method uses prepolymer polyurethane resin and amine curing agent to react to form polyurea. The coating has high crosslinking degree, good mechanical properties, good compatibility with various electromagnetic wave absorbers, and can meet the requirements of It can meet the requirements of high filling amount of agent, and realize the wide adjustment of different absorbing performance requirements.

[0028] Further, the acrylic polyurethane bottom layer is formed by spraying an acrylic polyurethane coating on the surface of the substrate. Preferably, the coating thickness is 20-...

Embodiment 1

[0037] This embodiment provides an anti-corrosion wave-absorbing coating, the preparation method of which comprises:

[0038] Coating preparation on a 180mm×180mm×5mm aluminum alloy substrate:

[0039]First, use a pneumatic grinder to grind the surface of the base plate with 80-grit sandpaper until a rough frosted texture appears, then wipe the surface with a cotton cloth dipped in acetone to remove surface impurities and oil, and dry it. Then spray an acrylic polyurethane primer with a thickness of 55 μm and cure for 12 hours at room temperature to form an acrylic polyurethane bottom layer; then spray a wave-absorbing coating with a thickness of 580 μm and cure for 24 hours at room temperature to form a wave-absorbing layer; finally spray a solvent-free polyurethane coating to form an anti-corrosion surface layer , with a thickness of 60 μm, after 12 hours of curing at room temperature, the anti-corrosion and wave-absorbing coating is obtained.

[0040] The preparation metho...

Embodiment 2

[0043] This embodiment provides an anti-corrosion wave-absorbing coating, the preparation method of which comprises:

[0044] Coating preparation on a 300mm×300mm×5mm aluminum alloy substrate:

[0045] First, use a pneumatic grinder to grind the surface with 120-grit sandpaper until a rough frosted texture appears, then wipe the surface with a cotton cloth dipped in alcohol to remove surface impurities and oil, and then dry it. Then spray acrylic polyurethane primer with a thickness of 70 μm and cure at room temperature for 12 hours to form an acrylic polyurethane bottom layer; then spray a wave-absorbing coating with a thickness of 1050 μm and cure at room temperature for 24 hours to form a wave-absorbing layer; finally spray a solvent-free polyurethane coating to form an anti-corrosion surface layer , thickness 110μm, curing at room temperature for 12 hours, that is, anti-corrosion absorbing coating.

[0046] The preparation method of the wave-absorbing coating described th...

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Abstract

The invention provides an anti-corrosion wave-absorbing coating and a preparation method thereof, and relates to the field of electromagnetic wave absorbing functional paint. The anti-corrosion wave-absorbing coating comprises an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer which are arranged sequentially, wherein the anti-corrosion surface layer isprepared by coating solvent-free polyurethane paint on the surface of the wave-absorbing layer. The preparation method of the anti-corrosion wave-absorbing coating comprises the following steps of: spraying acrylic polyurethane paint on the surface of a substrate to form the acrylic polyurethane bottom layer; spraying wave-absorbing paint on the cured acrylic polyurethane bottom layer to form thewave-absorbing layer; and spraying the solvent-free polyurethane paint to the surface of the cured wave-absorbing layer to form the anti-corrosion surface layer. The anti-corrosion wave-absorbing coating has the advantages of high wave-absorbing capability and excellent corrosion resistance, and can solve the problem of insufficient corrosion resistance of existing wave-absorbing coatings, and the weather resistance and service life of the wave-absorbing coating are improved.

Description

technical field [0001] The invention relates to the field of electromagnetic wave absorbing functional coatings, in particular to an anti-corrosion absorbing coating and a preparation method thereof. Background technique [0002] With the development of avionics technology and modern material technology, the importance of absorbing material technology in military and civilian applications is becoming more and more significant. Countries around the world have done a lot of work in this area, and have successfully applied wave-absorbing material technology to aviation, spaceflight, electromagnetic protection, electromagnetic shielding and other fields. Absorbing material technology is a technology that weakens, suppresses, absorbs, and deflects target electromagnetic waves through the design and use of certain materials. As a convenient, economical and adaptable absorbing material, the absorbing coating was originally developed for the radar absorbing needs of aerospace and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/08C09D5/32
CPCC09D5/08C09D5/32C09D175/14
Inventor 王建国王浩继魏凌云
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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