CN107892871B - Anti-corrosion wave-absorbing coating and preparation method thereof - Google Patents
Anti-corrosion wave-absorbing coating and preparation method thereof Download PDFInfo
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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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 coatings. The anti-corrosion wave-absorbing coating comprises an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer which are sequentially arranged, wherein the anti-corrosion surface layer is obtained by coating solvent-free polyurethane coating on the surface of the wave-absorbing layer. The preparation method comprises the following steps: spraying acrylic polyurethane coating on the surface of the base material to form an acrylic polyurethane bottom layer; spraying wave-absorbing coating on the cured acrylic polyurethane bottom layer to form a wave-absorbing layer; and spraying solvent-free polyurethane coating on the surface of the cured wave-absorbing layer to form an anti-corrosion surface layer. The wave-absorbing coating has the characteristics of strong wave-absorbing capability and excellent corrosion resistance, can solve the problem of insufficient corrosion resistance of the existing wave-absorbing coating, improves the weather resistance of the wave-absorbing coating and prolongs the service life of the wave-absorbing coating.
Description
Technical Field
The invention relates to the field of electromagnetic wave absorbing functional coatings, in particular to an anti-corrosion wave absorbing coating and a preparation method thereof.
Background
With the development of avionics technology and modern material technology, the importance of the wave-absorbing material technology in military and civil use is more and more obvious. Many works are done in this respect in all countries of the world, and the wave-absorbing material technology is successfully applied to the fields of aviation, aerospace, electromagnetic protection, electromagnetic shielding and the like. The wave-absorbing material technology is a technology for weakening, inhibiting, absorbing and deflecting target electromagnetic waves by designing and using certain specific materials. The wave-absorbing coating is a convenient, economic and good-adaptability wave-absorbing material, is originally developed for radar wave-absorbing requirements of aerospace and aviation aircrafts, but with the development of scientific technology and the progress of social economy, the wave-absorbing coating also starts to be popularized and applied on ground equipment, ocean equipment and civil equipment, and has higher requirements on the corrosion resistance of the wave-absorbing coating especially under the regional climate environment of high heat, high humidity and high salt fog.
The corrosion resistance of the existing wave-absorbing coating is poor, which becomes a great problem restricting the popularization and application of the coating.
Disclosure of Invention
The first purpose of the invention is to provide an anti-corrosion wave-absorbing coating which has the characteristics of strong wave-absorbing capability and excellent corrosion resistance, can solve the problem of insufficient corrosion resistance of the existing wave-absorbing coating, improves the weather resistance of the wave-absorbing coating and prolongs the service life of the wave-absorbing coating.
The second purpose of the invention is to provide a preparation method of the anti-corrosion wave-absorbing coating, which has the advantages of simple process, easy implementation, wide raw material source and realization of good compatibility of the wave-absorbing property and the corrosion resistance of the coating.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
an anti-corrosion wave-absorbing coating comprises an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer which are sequentially arranged, wherein the anti-corrosion surface layer is obtained by coating solvent-free polyurethane coating on the surface of the wave-absorbing layer.
A preparation method of an anti-corrosion wave-absorbing coating comprises the following steps:
spraying acrylic polyurethane paint on the surface of the base material to form an acrylic polyurethane bottom layer, wherein the thickness of a dry film coating of the acrylic polyurethane bottom layer is 20-100 mu m;
spraying wave-absorbing coating on the cured acrylic polyurethane bottom layer to form a wave-absorbing layer, wherein the thickness of a dry film coating of the wave-absorbing layer is 300-2000 mu m;
and spraying solvent-free polyurethane coating on the surface of the cured wave-absorbing layer to form an anti-corrosion surface layer, wherein the thickness of a dry film coating of the anti-corrosion surface layer is 50-500 mu m.
Compared with the prior art, the beneficial effects of the invention comprise:
the anti-corrosion wave-absorbing coating and the preparation method thereof provided by the invention have a three-layer coating structure, namely an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer, each layer has unique functionality, and the coatings have good compatibility and can enhance the comprehensive performance of the coating in a coordinated manner.
The solvent-free polyurethane coating is adopted to prepare the anti-corrosion surface layer, the compatibility between the solvent-free polyurethane coating and the wave-absorbing layer is good, the coating matrix system is close, the phenomena of bleeding, bottom biting, falling off and the like are not easy to occur, and the interlayer adhesion is strong; the anticorrosive surface layer prepared by the coating has excellent mechanical property and anticorrosive property, and the dielectric constant is low, so that electromagnetic waves can be favorably emitted into the wave-absorbing layer and absorbed in the wave-absorbing layer; meanwhile, the impedance between the anti-corrosion surface layer and the wave-absorbing layer is matched, so that the electromagnetic wave between the anti-corrosion surface layer and the wave-absorbing layer is prevented from being reflected due to impedance mismatching of the anti-corrosion surface layer and the wave-absorbing layer, and the wave-absorbing performance is prevented from being influenced.
Therefore, the anti-corrosion wave-absorbing coating provided by the invention is simple in preparation process and wide in raw material source, can realize good compatibility of wave-absorbing property and corrosion resistance of the coating, overcomes the defect of poor corrosion resistance of the wave-absorbing coating in the prior art, improves the weather resistance of the wave-absorbing coating and prolongs the service life of the wave-absorbing coating.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The embodiment provides an anti-corrosion wave-absorbing coating, which comprises an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer which are sequentially arranged.
The anti-corrosion surface layer is obtained by coating solvent-free polyurethane coating on the surface of the wave-absorbing layer, and preferably, the coating thickness of the anti-corrosion surface layer is 50-500 micrometers, or 100-400 micrometers, or 200-300 micrometers, or 240-260 micrometers. The anticorrosive surface layer cannot be too thick, otherwise, the transmission efficiency of electromagnetic waves can be influenced, and the wave absorbing performance of the anticorrosive surface layer is weakened; if the anti-corrosion surface layer is too thin, the aim of effective anti-corrosion is difficult to realize, and the finally obtained wave-absorbing coating has poor weather resistance and short service life.
Although many materials in the prior art can realize the function of corrosion prevention, most of the materials have poor compatibility with the wave-absorbing layer, and the formed coating has poor compactness, so that the materials can not maintain excellent wave-absorbing performance while having the corrosion prevention performance.
In the present embodiment, the solvent-free polyurethane coating is selected as the special material for preparing the anticorrosion surface layer, because: the anti-corrosion surface layer prepared from the solvent-free polyurethane coating has the following advantages: the solvent-free polyurethane coating and the wave-absorbing coating system have the advantages of good compatibility, stable property, excellent corrosion resistance, mature process technology and quick and convenient construction.
In addition, because the solid content of the solvent-free polyurethane coating is more than 99.5 percent, namely the solvent-free polyurethane coating almost does not contain solvent, compared with the common anticorrosive finish paint in the prior art, the coating obtained from the solvent-free polyurethane coating has less pores formed by solvent volatilization in the curing process, so that the compactness and the closure of the coating are enhanced, the impermeability of the coating is further improved, the penetration of moisture, air, ions and the like can be effectively prevented, and the solvent-free polyurethane coating has the characteristics of high abrasion resistance, high flexibility and high chemical stability, so that the whole wave-absorbing coating has good corrosion resistance and weather resistance.
Further, the wave-absorbing layer is obtained by coating the wave-absorbing coating on the surface of the acrylic polyurethane bottom layer, and the coating thickness of the wave-absorbing layer is 300-2000 microns, or 500-1700 microns, or 800-1500 microns, or 1000-1300 microns. The thickness of the wave-absorbing layer can be set according to the wavelength and the intensity of the electromagnetic waves in the application scene of the wave-absorbing coating within the range of 300-2000 mu m.
The wave-absorbing coating comprises the following raw materials in percentage by mass: 9.0-63.0 percent of absorbent, 7.0-73.0 percent of matrix resin, 0.5-2.0 percent of dispersant, 0.4-1.0 percent of anti-settling agent, 4.0-26.0 percent of diluent and 1.0-12.0 percent of curing agent.
Wherein, the absorbent comprises at least one of ferrite, carbonyl iron powder, iron-silicon-aluminum, iron-silicon-chromium and carbon black; the matrix resin is prepolymer polyurethane obtained by reacting toluene diisocyanate, polyester diol and polyester polyol; the diluent comprises a mixture of two or more of toluene, xylene, butyl acetate, methyl isobutyl ketone, butanone and cyclohexanone; the curing agent is an aromatic diamine curing agent, and preferably, the aromatic diamine curing agent comprises: 3, 5-dimethylthio toluenediamine, 3, 5-diethyltoluenediamine, 2, 4-diamino-3, 5-dimethylthio chlorobenzene, and 3,3 '-dichloro-4, 4' -diaminodiphenylmethane. The anti-settling agent comprises: common paint anti-settling agents such as organobentonite, fumed silica, modified hydrogenated castor oil, N-methyl pyrrolidone of modified polyurea, and the like; the above dispersant includes: common dispersing agents for polymer polyurethane coatings are sold in the market.
Further, the preparation method of the wave-absorbing coating comprises the following steps:
mixing the matrix resin, the dispersing agent, the anti-settling agent and the diluent according to the mass percentage, stirring for 20-40 min at the rotating speed of 1000-1200 rmp, then adding the absorbent, continuing stirring for 20-40 min, then adding the curing agent, and stirring for 3-10 min.
The wave absorbing layer prepared by the method adopts prepolymer polyurethane resin to react with amine curing agent to generate polyurea, has high coating crosslinking degree, good mechanical property and good compatibility with various electromagnetic wave absorbers, can meet the requirement of high filling amount of the absorber, and realizes wide adjustment of different wave absorbing performance requirements.
Furthermore, the acrylic polyurethane bottom layer is formed by spraying acrylic polyurethane paint on the surface of the base material, and preferably, the thickness of the coating is 20-100 μm, or 30-80 μm, or 40-60 μm, or 45-65 μm. The thickness of the acrylic polyurethane base layer can be set within the range of 20 to 100 μm depending on the material and surface condition of the substrate.
The bottom layer is an acrylic polyurethane coating, the matrix is formed by adding acrylic resin with good weather resistance, additives and the like to modify polyurethane resin, the acrylic polyurethane coating has good adhesive force, flexibility, acid and alkali resistance, salt resistance, oil resistance and water resistance, and when the acrylic polyurethane coating is coated on the surface of a metal base material, the acrylic polyurethane coating has high binding force with the interface of the base material and good compactness, can cover the surface defects of the base material, and greatly improves the protective performance and the service life of the coating.
The embodiment also provides a preparation method of the anti-corrosion wave-absorbing coating, which comprises the following steps:
step S1, spraying acrylic polyurethane paint on the surface of the base material to form the acrylic polyurethane bottom layer, wherein the thickness of a dry film coating of the acrylic polyurethane bottom layer is 20-100 mu m;
preferably, before performing step S1, the method further includes: the surface of a base material to be constructed is polished and decontaminated by a manual or power tool, and then is scrubbed by organic solvents such as alcohol, acetone and the like.
And S2, spraying wave-absorbing coating on the cured acrylic polyurethane bottom layer to form the wave-absorbing layer, wherein the thickness of the dry film coating of the wave-absorbing layer is 300-2000 mu m.
And S3, spraying solvent-free polyurethane paint on the surface of the cured wave-absorbing layer to form the anti-corrosion surface layer, wherein the thickness of a dry film coating of the anti-corrosion surface layer is 50-500 mu m.
The features and properties of the present invention are further described in detail below with reference to examples:
example 1
The embodiment provides an anti-corrosion wave-absorbing coating, and the preparation method comprises the following steps:
coating preparation was carried out on 180mm × 180mm × 5mm aluminum alloy substrate sheet:
firstly, the surface of a base material plate is polished by 80-mesh sand paper by a pneumatic polisher until rough frosted textures appear, the surface is wiped by dipping cotton cloth in acetone, impurities and oil stains on the surface are removed, and the base material plate is dried. Then acrylic polyurethane primer is sprayed, the thickness is 55 mu m, and the acrylic polyurethane primer is cured for 12 hours at normal temperature to form an acrylic polyurethane bottom layer; spraying wave-absorbing coating with the thickness of 580 mu m, and curing at normal temperature for 24 hours to form a wave-absorbing layer; and finally, spraying solvent-free polyurethane coating to form an anticorrosive surface layer with the thickness of 60 mu m, and curing for 12 hours at normal temperature to obtain the anticorrosive wave-absorbing coating.
The preparation method of the wave-absorbing coating comprises the following steps:
100g of prepolymer type polyurethane resin, 3.0g of dispersing agent 923S, 1.5g of anti-settling agent organobentonite and 50g of diluent (dimethylbenzene: cyclohexanone is 4:1 in mass ratio) are added into a beaker and dispersed by a stirrer, and the stirring speed is set to 1000 rpm; stirring for 30min, gradually and slowly adding 252g of carbonyl iron powder absorbent, and continuously stirring for 30min after the absorbent is added till the mixture is uniformly mixed; then 4.7g of curing agent 3, 5-diethyltoluenediamine is added, and stirred for 5min to obtain the sprayable wave-absorbing coating.
Example 2
The embodiment provides an anti-corrosion wave-absorbing coating, and the preparation method comprises the following steps:
coating preparation was carried out on 300mm × 300mm × 5mm aluminum alloy substrate sheets:
firstly, polishing the surface by using 120-mesh abrasive paper for a pneumatic polisher until rough polishing textures appear, dipping cotton cloth into alcohol to wipe the surface, removing impurities and oil stains on the surface, and drying. Then spraying acrylic polyurethane primer with the thickness of 70 mu m, and curing for 12 hours at normal temperature to form an acrylic polyurethane bottom layer; spraying wave-absorbing coating with the thickness of 1050 mu m, and curing at normal temperature for 24 hours to form a wave-absorbing layer; and finally, spraying solvent-free polyurethane coating to form an anticorrosive surface layer with the thickness of 110 mu m, and curing for 12 hours at normal temperature to obtain the anticorrosive wave-absorbing coating.
The preparation method of the wave-absorbing coating comprises the following steps:
adding 503g of prepolymer type polyurethane resin, 9.8g of dispersing agent 495, 6.0g of anti-settling agent BYK-410 and 220g of diluent (toluene, butyl acetate and butanone are in a mass ratio of 4:2: 1) into a beaker, and dispersing the mixture by adopting a stirrer, wherein the stirring speed is set to 1100 rpm; stirring for 40min, gradually and slowly adding 422g ferrite absorbent, and continuously stirring for 20min after the absorbent is added until the mixture is uniformly mixed; then 22g of curing agent 2, 4-diamino-3, 5-dimethylthio chlorobenzene is added, and after stirring for 3min, the sprayable wave-absorbing coating is obtained.
Example 3
The embodiment provides an anti-corrosion wave-absorbing coating, and the preparation method comprises the following steps:
coating preparation was carried out on 180mm × 180mm × 3mm iron substrate plates:
firstly, a manual grinding method is adopted to grind the surface by 80-mesh sand paper until bright iron metal color appears, cotton cloth is dipped in acetone to wipe the surface, impurities and oil stains on the surface are removed, and the surface is dried. Then spraying acrylic polyurethane primer with the thickness of 90 mu m, and curing for 12 hours at normal temperature to form an acrylic polyurethane bottom layer; spraying wave-absorbing coating with the thickness of 1550 microns, and curing at normal temperature for 24 hours to form a wave-absorbing layer; and finally, spraying solvent-free polyurethane coating to form an anticorrosive surface layer with the thickness of 230 mu m, and curing for 12 hours at normal temperature to obtain the anticorrosive wave-absorbing coating.
The preparation method of the wave-absorbing coating comprises the following steps:
557g of prepolymer type polyurethane resin, 5.7g of dispersant BYK-161, 3.5g of anti-settling agent 2810 and 195g of diluent (xylene: butyl acetate: methyl isobutyl ketone: cyclohexanone: 4:2:1:1, mass ratio) are added into a beaker and dispersed by a stirrer, and the stirring speed is set to 1200 rpm; stirring for 20min, gradually and slowly adding 45g of conductive carbon black absorbent, and continuously stirring for 40min after the absorbent is added until the mixture is uniformly mixed; then 25g of curing agent 3,3 '-dichloro-4, 4' -diaminodiphenylmethane is added, and after stirring for 10min, the sprayable wave-absorbing coating is obtained.
Embodiments 4 to 6 provide an anti-corrosion wave-absorbing coating, which is basically the same as embodiment 1 in preparation method, except that: the thicknesses of the acrylic polyurethane bottom layer, the wave absorbing layer and the anti-corrosion surface layer are shown in table 1.
Comparative examples 1 to 3
The comparative example provides a wave-absorbing coating, the preparation method of which is basically the same as that of the example 1, and the difference is that:
the anticorrosive surface layers in the coatings in the three comparative examples are obtained by respectively coating common polyurethane anticorrosive paint (the solid content is 60 +/-5%), epoxy anticorrosive paint and acrylic anticorrosive paint on the surface of the wave-absorbing layer.
Examples of the experiments
The following performance test data are combined to evaluate the wave-absorbing coatings provided in embodiments 1 to 6 and comparative examples 1 to 3 of the invention in terms of wave-absorbing and corrosion-resisting effects:
the wave-absorbing coatings prepared in examples 1 to 6 and comparative examples 1 to 3 were tested by the following standard methods, respectively:
A. testing the reflectivity of the cured coating sample plate in a frequency range of 8 GHz-18 GHz by adopting a GJB2038A-2011 radar absorbing material reflectivity test method, and recording the average reflectivity as the reflectivity a;
B. and testing the salt spray resistance of the cured coating sample plate by adopting GJB150.11A-2009 laboratory environment test method, observing the appearance of the coating after 2000 hours of test, testing the reflectivity of the coating in a frequency band of 8 GHz-18 GHz, and recording the average reflectivity as the reflectivity b.
The results are shown in table 1:
as can be seen from Table 1, the wave-absorbing coatings provided in the embodiments 1-6 of the invention have reflectivity less than-3.0 dB in the frequency range of 8 GHz-18 GHz, and have good wave-absorbing effect; in the salt spray resistance test, after 2000 hours of test, the coating has good appearance, no phenomena of discoloration, delamination, falling off, bubbles and the like, and the wave-absorbing capacity of the coating is basically maintained in an initial state, so that the wave-absorbing coating provided by the embodiments 1 to 6 of the invention has excellent corrosion resistance and wave-absorbing performance.
Compared with the wave-absorbing coating provided in the embodiment 1, the wave-absorbing coating provided in the comparative examples 1 to 3 is different in that the adopted anticorrosive coating is the existing common anticorrosive paint, and the test result shows that the wave-absorbing coating provided in the comparative examples 1 to 3 has the phenomena of color change, wrinkling, layering, falling off and the like after the salt spray resistance test under the same condition, and the wave-absorbing capacity of the wave-absorbing coating is far lower than that of the wave-absorbing coating in the initial state. Therefore, the wave-absorbing coating provided by the invention has a crucial influence on the wave-absorbing performance and the corrosion resistance of the whole wave-absorbing coating by the anticorrosive surface layer prepared from the solvent-free polyurethane coating.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (11)
1. The anti-corrosion wave-absorbing coating is characterized by comprising an acrylic polyurethane bottom layer, a wave-absorbing layer and an anti-corrosion surface layer which are sequentially arranged, wherein the anti-corrosion surface layer is obtained by coating solvent-free polyurethane coating on the surface of the wave-absorbing layer.
2. The anti-corrosion wave-absorbing coating according to claim 1, wherein the coating thickness of the anti-corrosion surface layer is 50-500 μm.
3. The anti-corrosion wave-absorbing coating according to claim 1, wherein the coating thickness of the wave-absorbing layer is 300-2000 μm.
4. The anti-corrosion wave-absorbing coating according to claim 1, wherein the wave-absorbing layer is obtained by coating a wave-absorbing coating on the surface of the acrylic polyurethane bottom layer; the wave-absorbing coating comprises the following raw materials in percentage by mass:
5. the anti-corrosion wave absorbing coating of claim 4 wherein said absorber comprises at least one of ferrite, iron powder, sendust, and carbon black.
6. The anti-corrosion wave-absorbing coating according to claim 4, wherein the matrix resin comprises prepolymer type polyurethane obtained by reacting toluene diisocyanate, polyester diol and polyester polyol.
7. The anti-corrosion wave absorbing coating of claim 4 wherein said curing agent is an aromatic diamine.
8. The anti-corrosive wave absorbing coating of claim 7 wherein said aromatic diamine comprises: 3, 5-dimethylmercaptotoluenediamine, 3, 5-diethyltoluenediamine, 2, 4-diamino-3, 5-dimethylmercaptochlorobenzene, and 3,3 '-dichloro-4, 4' -diaminodiphenylmethane.
9. The anti-corrosion wave absorbing coating of claim 4 wherein said diluent comprises a mixture of two or more of toluene, xylene, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, and cyclohexanone.
10. The anti-corrosion wave-absorbing coating according to claim 4, wherein the preparation method of the wave-absorbing coating comprises:
mixing the matrix resin, the dispersing agent, the anti-settling agent and the diluent according to the mass percentage, stirring for 20-40 min at the rotating speed of 1000-1200 rmp, then adding the absorbent, continuing stirring for 20-40 min, then adding the curing agent, and stirring for 3-10 min.
11. The preparation method of the anti-corrosion wave-absorbing coating according to any one of claims 1 to 10, characterized by comprising:
spraying acrylic polyurethane paint on the surface of a base material to form the acrylic polyurethane bottom layer, wherein the thickness of a dry film coating of the acrylic polyurethane bottom layer is 20-100 mu m;
spraying wave-absorbing coating on the cured acrylic polyurethane bottom layer to form the wave-absorbing layer, wherein the thickness of the dry film coating of the wave-absorbing layer is 300-2000 mu m;
and spraying a solvent-free polyurethane coating on the surface of the cured wave-absorbing layer to form the anticorrosive surface layer, wherein the thickness of a dry film coating of the anticorrosive surface layer is 50-500 mu m.
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| CN110591493A (en) * | 2018-06-13 | 2019-12-20 | 洛阳尖端技术研究院 | Wave-absorbing material |
| CN109354988B (en) * | 2018-08-24 | 2020-11-17 | 北京科技大学 | Basalt flake anticorrosive wave-absorbing coating and preparation method thereof |
| CN109433335A (en) * | 2018-10-22 | 2019-03-08 | 武汉大通窑炉机械设备有限公司 | A kind of high-strength, high-anti-friction grinder hammerhead |
| CN109627832B (en) * | 2018-12-19 | 2021-04-27 | 航天科工武汉磁电有限责任公司 | Environment-friendly wave-absorbing coating and preparation method thereof |
| CN109679437A (en) * | 2018-12-24 | 2019-04-26 | 南京波平电子科技有限公司 | A kind of flexibel polyurethane class pyramid suction wave decorative paint |
| CN110885583B (en) * | 2019-11-06 | 2021-08-10 | 航天材料及工艺研究所 | Ablation-resistant wave-absorbing anti-skid wear-resistant composite coating and preparation method thereof |
| CN110982421B (en) * | 2019-11-08 | 2021-07-30 | 航天科工武汉磁电有限责任公司 | High-temperature-resistant wave-absorbing coating and preparation method thereof |
| CN113683950A (en) * | 2021-08-24 | 2021-11-23 | 江苏铁锚玻璃股份有限公司 | Rain erosion resistant coating |
| CN116496690B (en) * | 2022-10-12 | 2025-03-11 | 中国航发北京航空材料研究院 | A high-elasticity and high-toughness low-frequency radar absorbing material and preparation method thereof |
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| CN103980806A (en) * | 2014-05-22 | 2014-08-13 | 电子科技大学 | Method for coating infrared stealth coating on object surface coated with radar absorbing coating |
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| CN103980806A (en) * | 2014-05-22 | 2014-08-13 | 电子科技大学 | Method for coating infrared stealth coating on object surface coated with radar absorbing coating |
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