CN111777911A - Radar wave-absorbing water-based paint and preparation method thereof - Google Patents
Radar wave-absorbing water-based paint and preparation method thereof Download PDFInfo
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- CN111777911A CN111777911A CN202010479099.3A CN202010479099A CN111777911A CN 111777911 A CN111777911 A CN 111777911A CN 202010479099 A CN202010479099 A CN 202010479099A CN 111777911 A CN111777911 A CN 111777911A
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- silicon carbide
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a radar wave-absorbing water-based paint and a preparation method thereof, wherein the radar wave-absorbing water-based paint comprises 20-60 parts of silicon carbide as an absorbent; 30-50 parts of waterborne epoxy resin as a protective agent; 30-50 parts of waterborne polyurethane resin as a protective agent; water as a solvent; 5-10 parts of zinc oxide nano particles serving as a modifier; 5-10 parts of anatase titanium dioxide nano particles serving as a modifier; and 1-2 parts of ethyl cellulose as a thickening agent. The silicon carbide is used as an absorbent to absorb electromagnetic waves, so that the radar wave-absorbing water-based paint has good flexibility after being formed into a film; the waterborne epoxy resin and the waterborne polyurethane resin are coated on the surface of the silicon carbide to play a role in protection, so that the radar wave-absorbing waterborne coating has good wear resistance and corrosion resistance after being formed into a film.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of anti-detection materials, and particularly relates to a radar wave-absorbing water-based paint and a preparation method thereof.
[ background of the invention ]
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 the 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 to ground equipment, ocean equipment and civil equipment.
The wave-absorbing coating of the radar generally takes an electric absorption material as a main representative, and the electric absorption material takes silicon carbide as a main representative, so that the wave-absorbing coating has the advantages of low density and the like, but the wave-absorbing coating is not wear-resistant, so that the coating is easy to wear after being coated and dried, and the wave-absorbing capability is reduced.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provide a radar wave-absorbing water-based paint and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
a radar absorbing water paint comprises 20-60 parts of silicon carbide as an absorbent by mass; 30-50 parts of waterborne epoxy resin as a protective agent; 30-50 parts of waterborne polyurethane resin as a protective agent; water as a solvent; 5-10 parts of zinc oxide nano particles serving as a modifier; 5-10 parts of anatase titanium dioxide nano particles serving as a modifier; and 1-2 parts of ethyl cellulose as a thickening agent.
The invention also comprises a silane coupling agent, 5-10 parts, which is used as a coupling agent between the silicon carbide and the zinc oxide nano-particles.
The mass part of the silicon carbide is more than twice of the sum of the mass part of the zinc oxide nano particles and the mass part of the anatase titanium dioxide nano particles.
A preparation method of radar wave-absorbing water-based paint comprises the following steps:
① mixing the aqueous epoxy resin, the aqueous polyurethane resin and water in the mixture T1Stirring at a temperature to form a first solution;
step ② dissolving the zinc oxide nanoparticles and anatase titanium dioxide nanoparticles into a first solution at T2Stirring at a temperature to form a second solution, T2>T1；
Step three: dissolving silicon carbide into the second solution, and uniformly stirring to form a third solution;
step IV: dissolving ethyl cellulose into the third solution, and uniformly stirring to form a fourth solution.
In step ③, the stirring temperature is T3，T3≥T2。
In step ④, the third solution is first warmed to T4，80℃≥T4>T3The stirring speed was 1000 r/min.
Compared with the prior art, the invention has the following advantages:
1. the silicon carbide is used as an absorbent to absorb electromagnetic waves, so that the radar wave-absorbing water-based paint has good flexibility after being formed into a film;
2. the water-based epoxy resin and the water-based polyurethane resin are coated on the surface of the silicon carbide to play a role in protection, so that the radar wave-absorbing water-based paint has good wear resistance and corrosion resistance after being formed into a film;
3. the zinc oxide nano-particles and the anatase titanium dioxide nano-particles are used as a magnetic absorption material and account for the very low mass fraction of the radar wave-absorbing water-based paint, so that the radar wave-absorbing water-based paint can still maintain strong flexibility and high bending strength after being formed into a film; however, the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles can well absorb electromagnetic waves, particularly infrared bands, and meanwhile corrosion resistance and wear resistance of the radar wave-absorbing water-based paint after film formation can be improved;
4. the ethyl cellulose can enhance the viscosity of the radar wave-absorbing water-based paint, promote the combination of the zinc oxide nano-particles and the anatase titanium dioxide nano-particles with the silicon carbide, increase the protection effect of the zinc oxide nano-particles and the anatase titanium dioxide nano-particles on the silicon carbide, and simultaneously facilitate the film formation of the radar wave-absorbing water-based paint.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below, but the following embodiments are only preferred embodiments of the present invention, and not all of them. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Example 1:
the embodiment provides a radar wave-absorbing water-based paint, which is prepared by the following steps:
① mixing the aqueous epoxy resin, the aqueous polyurethane resin and water in the mixture T1Stirring at a temperature to form a first solution; wherein the mass portion is 30 portions of waterborne epoxy resin, 30 portions of waterborne polyurethane resin and 200 portions of water; the part of water is far more than the sum of the parts of the waterborne epoxy resin and the waterborne polyurethane resin so as to ensure that the first solution is fully and uniformly dispersed and the T is1Generally between 30-40 ℃;
step ② dissolving the zinc oxide nanoparticles and anatase titanium dioxide nanoparticles into a first solution at T2Stirring uniformly at a temperature to form a second solution, wherein the dispersibility of the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles is weaker than that of the aqueous epoxy resin and the aqueous polyurethane resin, so that the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles can be only added in a small amount, and T is2>T1，T2Generally at 50-60 ℃, wherein the zinc oxide nanoparticles account for 5 parts and the anatase titanium dioxide nanoparticles account for 5 parts by weight;
③ dissolving the silane coupling agent and the silicon carbide into a second solutionStirring to form a third solution at a stirring temperature T3(ii) a In the stirring process, a silane coupling agent connects the water-based epoxy resin, the water-based polyurethane resin, the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles to the silicon carbide, in order to ensure the flexibility of the finally obtained radar wave-absorbing water-based film, the amount of the silicon carbide needs to be larger than the sum of the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles, generally speaking, the mass part of the silicon carbide is larger than twice of the sum of the mass parts of the zinc oxide nanoparticles and the anatase titanium dioxide nanoparticles, for example, in the embodiment, the mass parts of the silicon carbide are 20 parts, and the mass part of the silane coupling agent is 5 parts; silicon carbide is less dispersible in water than zinc oxide nanoparticles and anatase titanium dioxide nanoparticles, and thus T3≥T2，T3Generally about 70 ℃;
at ④, the third solution is first warmed to T4Dissolving 2 parts of ethyl cellulose into a third solution, wherein the ethyl cellulose is used as a thickening agent to increase the viscosity of the third solution, and the temperature is more than or equal to T at 80 ℃ for promoting the uniform dispersion of the ethyl cellulose4>T3E.g. T in this embodiment4And (4) uniformly stirring at 80 ℃ while ensuring the residual amount of water in the third solution to form a fourth solution, wherein the stirring speed is 1000r/min, and the fourth solution is gradually returned to the room temperature in the stirring process.
Example 2:
this example is different from example 1 in that 30 parts of silicon carbide is used in step (c).
Example 3:
the difference between this example and example 1 is that, in step (ii), 10 parts of zinc oxide nanoparticles and 10 parts of anatase titanium dioxide nanoparticles are used.
TABLE 1
| 720nm | 740nm | 760nm | 780nm | |
| Example 1 | 32.44％ | 41.86％ | 62.14％ | 44.85％ |
| Example 2 | 35.51％ | 38.61％ | 45.93％ | 48.24％ |
| Example 3 | 37.22％ | 41.15％ | 50.59％ | 55.83％ |
Table 1 shows the infrared absorption data of three radar absorbing water-based films with 3 μm thickness prepared in examples 1, 2 and 3 between 720-780 nm. It can be seen that an increase in the proportion of silicon carbide reduces the absorption in the 740-760nm band. In contrast, the proportion of the zinc oxide nanoparticles to the anatase titanium dioxide nanoparticles is increased, so that the absorption at 780nm can be remarkably improved, but the absorption at 760nm can be remarkably reduced, and the absorption at 740nm is not obviously influenced.
TABLE 2
| Temperature tolerance (. degree.C.) | Flexural strength (Mpa) | |
| Example 1 | 400 | 790 |
| Example 2 | 611 | 787 |
| Example 3 | 427 | 799 |
Table 2 shows the temperature resistance and the bending strength of three radar wave-absorbing aqueous films, and it can be seen that the temperature resistance of the radar wave-absorbing aqueous film can be improved no matter the ratio of the zinc oxide nanoparticles to the anatase titanium dioxide nanoparticles is increased or the ratio of the silicon carbide is increased, but the influence on the bending strength of the radar wave-absorbing aqueous film is not great.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (6)
1. The radar wave-absorbing water-based paint is characterized by comprising 20-60 parts of silicon carbide serving as an absorbent by mass; 30-50 parts of waterborne epoxy resin as a protective agent; 30-50 parts of waterborne polyurethane resin as a protective agent;
water as a solvent; 5-10 parts of zinc oxide nano particles serving as a modifier; 5-10 parts of anatase titanium dioxide nano particles serving as a modifier; and 1-2 parts of ethyl cellulose as a thickening agent.
2. The radar absorbing water-based paint according to claim 1, further comprising 5-10 parts of a silane coupling agent as a coupling agent between the silicon carbide and the zinc oxide nanoparticles.
3. The radar wave absorbing aqueous coating of claim 2, wherein the mass fraction of the silicon carbide is more than twice the sum of the mass fraction of the zinc oxide nanoparticles and the mass fraction of the anatase titanium dioxide nanoparticles.
4. The preparation method of the radar wave absorbing water-based paint according to the claim 1, the claim 2 or the claim 3, characterized by comprising the following steps:
① mixing the aqueous epoxy resin, the aqueous polyurethane resin and water in the mixture T1Stirring at a temperature to form a first solution;
step ② dissolving the zinc oxide nanoparticles and anatase titanium dioxide nanoparticles into a first solution at T2Stirring at a temperature to form a second solution, T2>T1；
Step three: dissolving silicon carbide into the second solution, and uniformly stirring to form a third solution;
step IV: dissolving ethyl cellulose into the third solution, and uniformly stirring to form a fourth solution.
5. The preparation method of the radar absorbing water-based paint according to claim 4, wherein the step ③ is carried outIn the stirring temperature of T3，T3≥T2。
6. The method for preparing the radar absorbing water-based paint according to claim 5, wherein in step ④, the temperature of the third solution is first raised to T4，80℃≥T4>T3The stirring speed was 1000 r/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479099.3A CN111777911A (en) | 2020-05-29 | 2020-05-29 | Radar wave-absorbing water-based paint and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010479099.3A CN111777911A (en) | 2020-05-29 | 2020-05-29 | Radar wave-absorbing water-based paint and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4265931A (en) * | 1974-10-29 | 1981-05-05 | Fuji Photo Film Co., Ltd. | Process for the production of a magnetic recording member |
| CN103642361A (en) * | 2013-12-10 | 2014-03-19 | 北京新立机械有限责任公司 | Water-soluble nano camouflage paint and preparation method thereof |
| CN105368255A (en) * | 2015-11-30 | 2016-03-02 | 长春理工大学 | Water-soluble nano stealthy coating material |
-
2020
- 2020-05-29 CN CN202010479099.3A patent/CN111777911A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4265931A (en) * | 1974-10-29 | 1981-05-05 | Fuji Photo Film Co., Ltd. | Process for the production of a magnetic recording member |
| CN103642361A (en) * | 2013-12-10 | 2014-03-19 | 北京新立机械有限责任公司 | Water-soluble nano camouflage paint and preparation method thereof |
| CN105368255A (en) * | 2015-11-30 | 2016-03-02 | 长春理工大学 | Water-soluble nano stealthy coating material |
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Application publication date: 20201016 |