Aqueous anti-corrosion anti-aging wave-absorbing coating and preparation method thereof

Abstract

The invention discloses an aqueous anti-corrosion anti-aging wave-absorbing coating and a preparation method thereof, and belongs to the technical field of wave-absorbing materials, wherein the wave-absorbing coating mainly comprises a two-component aqueous epoxy primer layer, a two-component aqueous polyurethane wave-absorbing layer and a two-component aqueous polyurethane top coat layer. The preparation method comprises: respectively preparing the three coatings, and integrally spraying, wherein the bottom layer is the two-component aqueous epoxy primer layer, the middle layer is the two-component aqueous polyurethane wave-absorbing layer, and the uppermost layer is the two-component aqueous polyurethane top coat layer. According to the invention, the wave-absorbing coating obtained by the preparation method has advantages of excellent salt spray resistance, excellent aging resistance, excellent corrosion resistance, excellent hardness and excellent adhesive force, and prolongs the outdoor service life of equipment.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a water-based anti-corrosion and aging-resistant wave-absorbing coating and a preparation method thereof. Background technique [0002] With the rapid development of modern material technology, the application of microwave absorbing materials in various industries is becoming more and more extensive. A wave-absorbing material is a type of material that can absorb or greatly reduce the energy of electromagnetic waves incident on its surface, thereby reducing electromagnetic wave interference. The application of electromagnetic waves has penetrated into every corner. The application of electromagnetic technology not only brings great convenience, but also introduces serious electromagnetic radiation pollution. In terms of life, electromagnetic radiation will not only interfere with the normal physiological functions of the human body and affect human h...

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Problems solved by technology

The prepared wave-absorbing coating is coated and cured, and the reflection attenuation of the electromagnetic wave in the 2-18GHz frequency range is greater than 10dB, and the lowest reflectivity reaches -27dB, but the raw material epoxy resin used in the preparation has poor weather resistance , in the outdoor environment for a long time, the service life of the coating is limited

[0007] In order to develop a wave-absorbing material with better performance in all aspects, to further improve the wave-absorbing performance, broadband, low reflection, small mass and thin thickness, etc., it is also necessary to overcome short service life, poor corrosion resistance and coating Easy to crack and other shortcomings, therefore, there is an urgent need to provide an anti-corrosion and aging-resistant water-based wave-absorbing coating and its preparation method

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