Wave-absorbing coating material and preparation method thereof

A technology of wave absorbing paint and carbonyl iron powder, applied in radiation absorbing paint, epoxy resin paint, polyurea/polyurethane paint, etc. Large constants, etc., to achieve the effect of broadband and absorption performance, good broadband absorption performance, and resistance to complex environments

Pending Publication Date: 2018-03-06
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has some disadvantages at the same time: for example, poor corrosion resistance; large dielectric constant and poor spectral characteristics, poor low-frequency absorption performance; high density, large volume duty ratio of the absorbent (generally greater than 50%), difficult to disperse, It is easy to oxidize in the air for a long time
Due to the small diameter of carbonyl particles, oxidation will cause the loss of effective absorbing components, resulting in reduced absorbing performance
And there is no report that the thin-layer radar absorbing coating with ordinary carbonyl iron powder as the absorbing agent has broadband absorbing performance

Method used

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  • Wave-absorbing coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix the carbonyl iron powder with the silane coupling agent solution, wherein the amount of the silane coupling agent is 6% of the mass of the carbonyl iron powder, and then carry out the second ultrasonic dispersion of the mixed solution in a water bath at 40°C to make the carbonyl iron powder Uniformly dispersed in the silane coupling agent solution, reacted for 40min, after the reaction, the reactant was filtered, washed with deionized water for several times, and dried to obtain carbonyl iron powder particles with organic silane modified surface amination; the surface amination The carbonyl iron powder particles are ground in a ball mill to obtain modified carbonyl iron powder.

[0031] Add 8 parts of modified carbonyl iron powder into 1 part of epoxy resin matrix, mix well, then add 0.8 parts of diluent and 0.2 parts of anti-settling agent. Wherein, the diluent is xylene and the anti-sedimentation agent is titanate coupling agent.

[0032] After stirring evenly, p...

Embodiment 2

[0034] Mix the carbonyl iron powder with the silane coupling agent solution, wherein the amount of the silane coupling agent is 2% of the mass of the carbonyl iron powder, and then ultrasonically disperse the mixed solution in a water bath at 30°C to make the carbonyl iron powder uniform Disperse in the silane coupling agent solution, react for 30min, filter the reactant after the reaction, wash with deionized water several times, and dry to obtain carbonyl iron powder particles with surface amination modified by organosilane; The iron powder particles are ground in a ball mill to obtain modified carbonyl iron powder.

[0035] Add 10 parts of modified carbonyl iron powder into 2 parts of epoxy resin matrix, mix well, then add 0.5 parts of diluent and 0.3 parts of anti-settling agent. The diluent is n-butanol and the anti-sedimentation agent is titanate coupling agent.

[0036] After stirring evenly, perform the first ultrasonic dispersion for 10 hours, add 0.4 parts of curing...

Embodiment 3

[0038] Mix the carbonyl iron powder with the silane coupling agent solution, wherein the amount of the silane coupling agent is 10% of the mass of the carbonyl iron powder, and then carry out the second ultrasonic dispersion of the mixed solution in a water bath at 50°C to make the carbonyl iron powder Uniformly dispersed in the silane coupling agent solution, reacted for 50min, after the reaction, the reactant was filtered, washed with deionized water for several times, and dried to obtain carbonyl iron powder particles with organic silane modified surface amination; the surface amination The carbonyl iron powder particles are ground in a ball mill to obtain modified carbonyl iron powder.

[0039] Add 5 parts of modified carbonyl iron powder to 1.5 parts of epoxy resin matrix, mix well, then add 1 part of diluent and 0.4 parts of anti-settling agent. The diluent is acetone and xylene in any proportion and the anti-sedimentation agent is a titanate coupling agent.

[0040] Afte...

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PUM

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Abstract

The invention discloses a wave-absorbing coating material, which comprises, by mass, 1-2 parts of a resin matrix, 5-10 parts of modified carbonyl iron powder, 0.5-1 part of a diluent, 0.2-0.4 part ofan anti-settling agent, and 0.2-0.4 part of a curing agent. According to the present invention, the carbonyl iron magnetic particles are subjected to surface coating through the wet modification method, and the coated particles are compounded with the epoxy resin so as to prepare the wave-absorbing coating material; and the wave-absorbing coating material prepared through the method has advantagesof excellent wave absorbing, good broadband wave absorbing performance, light weight, wide application range and complex-environment resistance, and can achieve the broadband and high absorption performance at a maximum.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a modified iron powder wave-absorbing coating and a preparation method thereof. Background technique [0002] Radar absorbing coatings mainly include carbon black radar absorbing coatings, ferrite radar absorbing coatings and nanocomposite radar absorbing coatings. 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. . Most of the existing domestic anti-corrosion radar absorbing coatings have problems such as narrow absorbing band, thick radar absorbing coating, and poor environmental stability. [0003] Carbonyl iron powder absorbing agent is one of the most commonly used radar absorbing agent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/00C09D5/32C09D161/20C09D161/06C09D175/04
CPCC08K3/18C08K9/06C08K9/10C09D5/32C09D133/00C09D161/06C09D161/20C09D163/00C09D175/04
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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