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Wave-absorbing coating and preparation method thereof

A wave-absorbing coating and raw material technology, applied to radiation-absorbing coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve problems such as narrow wave-absorbing frequency band, poor wave-absorbing performance, and poor oxidation resistance, and achieve Improve weather resistance, improve coating effect, and increase the effect of coating thickness

Inactive Publication Date: 2020-06-05
上杭汉晶新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of carbon black as a wave absorbing agent is characterized by poor wave absorbing performance, which cannot meet the requirements of ship equipment. Ferrite is currently a relatively mature wave absorbing agent, but the main disadvantage is that the wave absorbing frequency band is narrow and the coating surface density is heavy.
The wave-absorbing iron powder is widely used in the field of wave-absorbing materials. It is a typical magnetic loss type wave-absorbing material. Large and poor spectrum characteristics, low magnetic permeability, poor impedance matching characteristics with air and narrow absorption frequency band, it is difficult to achieve high absorption of wave-absorbing coatings at a wide frequency, and it is impossible to achieve excellent performance of wave-absorbing coatings requirements, which limits its application to some extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw materials of the modified wave-absorbing coating include: 2 parts of resin matrix, 20 parts of modified wave-absorbing iron powder, 1 part of diluent, 1 part of filler, 0.4 parts of anti-settling agent, and 0.3 parts of curing agent;

[0023] Add 20g of wave-absorbing iron powder to 100mL of A-1120 n-butanol solution with a mass fraction of 10%, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, and 1mL of silane coupling agent KH550 Ethanol solution, ultrasonically disperse for 50min, then add 1.5mL methyl orthosilicate ethanol solution, stir and deposit in a constant temperature water bath at 40°C for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, and place in nitrogen Dry in a protected oven at 60° C. for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing i...

Embodiment 2

[0025] The raw materials of the modified wave-absorbing coating include: 1 part of resin matrix, 10 parts of modified wave-absorbing iron powder, 0.5 part of diluent, 2 parts of filler, 0.4 part of anti-settling agent, and 0.3 part of curing agent;

[0026] Add 20g of wave-absorbing iron powder to 100mL of A-1120 n-butanol solution with a mass fraction of 10%, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, and 1mL of silane coupling agent A -1130 ethanol solution, ultrasonically disperse for 50min, then add 4mL tetraethyl orthosilicate ethanol solution, stir and deposit in a 40°C constant temperature water bath for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, place in Dry in an oven at 60° C. protected by nitrogen for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing ...

Embodiment 3

[0028] The raw materials of the modified wave-absorbing coating include: 1.5 parts of resin matrix, 18 parts of modified wave-absorbing iron powder, 0.8 parts of diluent, 5 parts of filler, 0.3 parts of anti-settling agent, and 0.3 parts of curing agent;

[0029] Add 20g of wave-absorbing iron powder to 100mL of 10% KH550 n-butanol solution, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, 1mL of silane coupling agent A-1130 Ethanol solution, ultrasonically disperse for 50min, then add 6mL orthopropyl silicate ethanol solution, stir and deposit in a constant temperature water bath at 40°C for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, and place it under nitrogen protection Dry in an oven at 60°C for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing iron powder. Add t...

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PUM

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Abstract

The invention provides wave-absorbing coating and a preparation method thereof. The preparation method comprises the following steps: adding wave-absorbing iron powder into an n-butyl alcohol solutionof a silane coupling agent step by step, adding ammonia water, deionized water and an ethanol solution of a silica gel coupling agent, adding a silicate ester ethanol solution, reacting, centrifuging, washing, drying (under the protection of nitrogen), ball-milling, and carrying out heat treatment to obtain SiO2 modified wave-absorbing iron powder; adding the modified wave-absorbing iron powder into a resin matrix, uniformly mixing, and then adding a diluent and an anti-settling agent; after uniformly stirring, carrying out ultrasonic dispersion, adding a curing agent, and uniformly stirringto obtain the wave-absorbing coating. By applying the modified wave-absorbing iron powder to the coating, the requirements of thinness, lightness, width and strength of wave-absorbing paint can be met, and the coating can be applied to the fields of ships, naval vessels, radar antennas, electronic shielding and the like.

Description

technical field [0001] The invention relates to the field of paint preparation, in particular to a wave-absorbing paint and a preparation method thereof. Background technique [0002] The wave-absorbing coatings mainly include carbon black wave-absorbing paints, ferrite wave-absorbing paints and nano-composite wave-absorbing paints. The use of carbon black as a wave absorbing agent is characterized by poor wave absorbing performance, which cannot meet the requirements of ship equipment. Ferrite is currently a relatively mature wave absorbing agent, but the main disadvantage is that the wave absorbing frequency band is narrow and the coating surface density is heavy. . The wave-absorbing iron powder is widely used in the field of wave-absorbing materials. It is a typical magnetic loss type wave-absorbing material. Large and poor spectrum characteristics, low magnetic permeability, poor impedance matching characteristics with air and narrow absorption frequency band, it is d...

Claims

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Application Information

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IPC IPC(8): C09D5/32C09D163/00C09D161/20C09D161/06C09D175/04C09D133/00
CPCC08K2003/0856C09D5/32C09D133/00C09D161/06C09D161/20C09D163/00C09D175/04C08K9/10C08K3/08
Inventor 丘建强
Owner 上杭汉晶新材料科技有限公司
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