Radar wave-absorbing coating for rapid construction and preparation method and application thereof

A radar wave-absorbing coating and radar wave technology, applied in radiation-absorbing coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of slow drying and curing speed of coatings, prone to sagging, and long construction period. The effect of short curing cycle, good radar absorption performance and low cost

Inactive Publication Date: 2018-05-08
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 existing epoxy resin system radar absorbing coating has been widely used because of its good adhesion to the substrate, small shrinkage rate, and good performance stability. However, in order to take into account the flexibility of the coating, the drying and curing speed of the coating must be limited. Slower, it is more difficult to solidify under low temperature conditions, and it is easy to sag during the construction process, and the construction period is too long in engineering applications

Method used

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preparation example Construction

[0030] In addition, the embodiment of the present invention also provides a preparation method of the above rapid application radar absorbing paint, which includes the following steps: mixing radar absorber, resin matrix, filler, anti-sedimentation agent, solvent and curing agent according to the proportion.

[0031] Preferably, in the above steps, the resin matrix, the anti-sedimentation agent and the solvent can be mixed first according to the ratio, then the filler and the radar wave absorber are added, and finally the curing agent is added.

[0032] Preferably, the resin matrix, anti-sedimentation agent and solvent are mixed for the first time at 800-1200rpm for 5-10 minutes, then the filler and radar wave absorber are added for the second time and mixed for 10-15 minutes, and finally the curing agent is added for the third time Mix for 5-10min.

[0033] More preferably, the filler, the radar absorber and the curing agent are all added to the reaction system at 400-600 rpm...

Embodiment 1

[0039]Add 25 parts by weight of resin matrix, 1 part by weight of anti-settling agent and 2 parts by weight of solvent into the beaker, stir at 800 rpm for 10 minutes, then adjust the speed to 400 rpm, slowly add 0.5 parts by weight of filler and 55 parts by weight After adding the radar wave absorber in parts by weight, adjust the speed back to 800rpm, stir for 15min until the mixture is uniform, then adjust the speed to 400rpm, slowly add 1 part by weight of curing agent, and turn the speed back to 800rpm, stir for 10min , It is necessary to quickly construct radar absorbing coatings.

[0040] Among them, the radar wave absorber contains ferrite, the resin matrix contains polyurethane prepolymer, the filler contains hollow glass microspheres, the anti-settling agent contains polyamide wax anti-settling agent, the solvent contains toluene, and the curing agent contains 3,5-bis Methylthiotoluenediamine.

Embodiment 2

[0042] Add 35 parts by weight of resin matrix, 3 parts by weight of anti-settling agent and 10 parts by weight of solvent into the beaker, stir at 1200 rpm for 5 minutes, then adjust the speed to 600 rpm, slowly add 1 part by weight of filler and 70 parts by weight Radar wave absorber in parts by weight, after the addition, turn the speed back to 1200rpm, stir for 10min until evenly mixed, then adjust the speed to 600rpm, slowly add 3 parts by weight of curing agent, and turn the speed back to 1200rpm, stir for 5min , It is necessary to quickly construct radar absorbing coatings.

[0043] Among them, the radar wave absorber contains carbonyl iron and sendust, the resin matrix contains polyurethane prepolymer, the filler contains hollow glass microspheres, the anti-settling agent contains polyamide wax anti-settling agent, and the solvent contains xylene and ethyl acetate. The curing agent contains 3,5-diethyltoluenediamine and 2,4-diamino-3,5-dimethylthiochlorobenzene.

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Abstract

The invention relates to a radar wave-absorbing coating for rapid construction and a preparation method and application thereof, and belongs to the field of the coating with the electromagnetic wave absorbing function. The radar wave-absorbing coating is prepared from radar wave-absorbing agent, a resin matrix, a filling agent, an anti-settling agent, a curing agent and a solvent. The preparationmethod comprises the following step that the above raw materials are mixed according to the matching ratio. The radar wave-absorbing coating has the following advantages that the coating is not easilysagged after being sprayed, the surface dry speed is high, the curing cycle is short and the low-temperature adaptability is good. Moreover, the radar wave-absorbing coating is excellent in mechanical property and good in radar wave-absorbing property, the problem that the construction speed and the mechanical property of an existing radar wave-absorbing coating are difficultly taken into accountsimultaneously can be solved, and the engineering applicability of the coating is improved. The preparation method is simple in process, low in cost and simple and rapid in process control. The wave-absorbing materials are used in aviation or aerospace or electromagnetic -protection or electromagnetic-shielding products, the construction period can be effectively shortened, and the coating has abroad development prospect.

Description

technical field [0001] The invention relates to the field of electromagnetic wave absorbing functional coatings, and in particular to a rapid construction radar absorbing coating and its preparation method and application. 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 successfully applied wave-absorbing material technology to aviation, aerospace, electromagnetic protection, electromagnetic shielding and other fields. [0003] 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 wave-absorbing material, wave-absorbing coatings were originally developed for the radar a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/32C09D175/04C09D7/61C09D7/65
CPCC08K2003/2272C09D5/32C09D175/04C08L77/00C08K7/28C08K3/22C08K3/34
Inventor 魏凌云王浩继王建国朱时霖
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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