Porous wave-transparent super-hydrophobic coating as well as preparation method and application thereof

Abstract

The invention discloses a porous wave-transparent super-hydrophobic coating as well as a preparation method and application thereof, and relates to the technical field of functional coatings. The coating is prepared from the following raw material components in parts by mass: 1 to 10 parts of wave-transparent resin, 0.1 to 5 parts of fluorinated modifier, 0.5 to 6 parts of curing agent, 6 to 60 parts of volatile organic solvent and 0.1 to 2 parts of water solvent. The super-hydrophobic coating is prepared by adopting a method of constructing a porous structure in the wave-transparent resin, so that the wave-transparent performance of the coating is synergistically improved, and meanwhile, the coating is endowed with waterproof and self-cleaning functions.

Description

Technical Field

[0001] The present invention relates to the technical field of functional coatings, and in particular to a porous wave-transmitting super-hydrophobic coating and a preparation method and application thereof. Background Art

[0002] Communication equipment includes communication base stations, satellite antennas, radars, electronic equipment, etc., which often face various harsh environments when serving outdoors, such as rain and snow, sand and dust erosion, etc., which seriously reduce the signal transmission performance of the equipment. In order to solve this problem, ensure the efficient operation of communication equipment around the clock, and improve the reliability and work efficiency of communication equipment, it is of great significance to design a waterproof self-cleaning coating.

[0003] Inspired by the "lotus effect", the super-hydrophobic coating is a super-wetting surface with a static contact angle of water droplets greater than 150° and a rolling angle less than 10° on its surface under the combined action of the surface micro-nano composite structure and low surface energy organic matter. It has excellent waterproof, anti-fouling and self-cleaning properties. Applying this coating to the surface of communication equipment can not only effectively solve the above problems, but also provide physical protection for the substrate to increase its service life. However, the current super-hydrophobic coating has a rough surface structure and a multi-phase mixture inside, which seriously affects its wave transmission performance. Therefore, there have been few reports on the protection strategy of super-hydrophobic coatings on the surface of communication equipment. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention is to improve the wave permeability of the super-hydrophobic coating so that it can be applied to the surface of communication equipment, solve the problem of signal transmission performance weakening caused by rain and dust, and provide a porous wave-transmitting super-hydrophobic coating and its preparation method and application. This method simplifies the preparation process of the super-hydrophobic coating, has the advantages of simple operation, low cost, etc., and is suitable for large-scale application.

[0005] The first object of the present invention is to provide a porous wave-transmitting super-hydrophobic coating, wherein the raw materials of the coating include the following components in parts by weight: 1-10 parts of wave-transmitting resin, 0.1-5 parts of fluorinated modifier, 0.5-6 parts of curing agent, 6-60 parts of volatile organic solvent, and 0.1-2 parts of water solvent.

[0006] Preferably, the wave-transmitting resin is one or more of polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin and cyanate resin.

[0007] Preferably, the volatile organic solvent is one or more of ethyl acetate, butyl acetate, methyl acetate, and hydrofluoroether.

[0008] Preferably, the fluorinated modifier is one or more of fluorinated siloxane, fluorinated chlorosilane, fluorinated silicone resin, and fluorinated acrylic resin.

[0009] Preferably, the curing agent is one or more of a boron trifluoride curing agent, a polyisocyanate curing agent, a polyol curing agent, and a polyamine curing agent.

[0010] The second object of the present invention is to provide a method for preparing a porous wave-transmitting super-hydrophobic coating, comprising the following steps: Dissolving the wave-transmitting resin in a volatile organic solvent to prepare a wave-transmitting resin solution; Adding a fluorinated modifier to the wave-transmitting resin solution, mixing and reacting, and obtaining a fluorinated wave-transmitting resin solution; Adding a curing agent to the fluorinated wave-transmitting resin solution and mixing them evenly to obtain a solution A; The aqueous solvent is uniformly dispersed in the volatile organic solvent to prepare solution B; The solution A and the solution B are uniformly mixed to prepare a porous wave-transmitting super-hydrophobic coating; The porous wave-transmitting super-hydrophobic coating is coated on the surface of the substrate, left to stand at room temperature for 0.5 to 2 hours, and then kept at 80 to 150° C. for 2 to 4 hours, thereby preparing a porous wave-transmitting super-hydrophobic coating on the surface of the substrate.

[0011] Preferably, the mass ratio of the wave-transmitting resin to the volatile organic solvent in the wave-transmitting resin solution is 1:0.5-50.

[0012] Preferably, the mass ratio of the aqueous solvent to the volatile organic solvent in the solution B is (0.1-2):(1-10).

[0013] Preferably, the coating on the substrate surface is carried out by spraying, brushing or dipping.

[0014] The third object of the present invention is to provide a porous wave-transmitting super-hydrophobic coating for use in communication equipment.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a porous wave-transmitting super-hydrophobic coating and a preparation method and application thereof. The present invention adopts a method of constructing a porous structure in a wave-transmitting resin to prepare the super-hydrophobic coating, and utilizes the wave-transmitting resin and the porous structure to synergistically improve the wave-transmitting performance of the coating, so that the wave transmittance exceeds 92%, and at the same time gives the coating waterproof and self-cleaning functions.

[0016] The present invention modifies the wave-transmitting resin by a fluorinated modifier to reduce the surface energy of the wave-transmitting resin, and combines the roughness imparted by the porous structure to make the coating have excellent super-hydrophobicity, with a surface water contact angle of more than 160° and a rolling angle of less than 2°.

[0017] The coating provided by the present invention is used on communication equipment, which not only ensures the working performance of the communication equipment itself, but also gives it a variety of unique functions, including super hydrophobicity and self-cleaning, so that it can avoid performance degradation caused by rain or dust coverage and operate efficiently and stably around the clock.

[0018] The present invention simplifies the coating preparation process, and only requires a simple mixing and stirring of several raw materials, and then a step of A porous wave-transmitting super-hydrophobic coating can be obtained by spraying, which has low requirements on the material and shape of the substrate, is low-cost, and can be prepared on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The macroscopic and wettability diagrams of the porous wave-transmitting super-hydrophobic coating, where a is a macroscopic photo of the coating, and b is an optical microscopic picture of the water contact angle and rolling angle on the coating surface; Figure 2 This is the surface morphology of the porous wave-transmitting super-hydrophobic coating; Figure 3 The specific surface area and porosity diagram of the porous wave-transmitting super-hydrophobic coating; Figure 4 It is the wave transmittance diagram of the porous wave-transmitting super-hydrophobic coating; Figure 5 : is a self-cleaning characteristic diagram of a porous wave-transmitting super-hydrophobic coating, where a is a water droplet self-cleaning characteristic diagram, and b is a condensation droplet self-cleaning characteristic diagram; Figure 6 This is the environmental stability diagram of the porous wave-transmitting super-hydrophobic coating. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments and drawings, but the embodiments are not intended to limit the present invention.

[0021] The present invention aims at the problem that the current super hydrophobic coating has a rough surface structure and a multi-phase mixture inside, which seriously affects its wave transmission performance. In order to improve the wave transmission of the super hydrophobic coating so that it can be applied to the surface of communication equipment and solve the problem of weakened signal transmission performance caused by rain and dust, a porous wave-transmitting super hydrophobic coating and its preparation method and application are provided.

[0022] In order to achieve the above object, the first aspect of the present invention provides a porous wave-transmitting super-hydrophobic coating, wherein the raw materials of the coating include the following components in parts by weight: 1-10 parts of wave-transmitting resin, 0.1-5 parts of fluorinated modifier, 0.5-6 parts of curing agent, 6-60 parts of volatile organic solvent, and 0.1-2 parts of water solvent.

[0023] Wherein, the wave-transmitting resin is one or more of polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin and cyanate resin.

[0024] The volatile organic solvent is one or more of ethyl acetate, butyl acetate, methyl acetate, and hydrofluoroether. The volatile organic solvent is immiscible with the water solvent.

[0025] The fluorinated modifier is one or more of fluorinated siloxane, fluorinated chlorosilane, fluorinated silicone resin, and fluorinated acrylic resin.

[0026] The curing agent is one or more of a boron trifluoride curing agent, a polyisocyanate curing agent, a polyol curing agent, and a polyamine curing agent.

[0027] The aqueous solvent used was deionized water.

[0028] A second aspect of the present invention provides a method for preparing a porous wave-transmitting super-hydrophobic coating, comprising the following steps: Dissolving the wave-transmitting resin in a volatile organic solvent to prepare a wave-transmitting resin solution; Adding a fluorinated modifier to the wave-transmitting resin solution, mixing and reacting, and obtaining a fluorinated wave-transmitting resin solution; Adding a curing agent to the fluorinated wave-transmitting resin solution and mixing them evenly to obtain a solution A; The aqueous solvent is uniformly dispersed in the volatile organic solvent to prepare solution B; The solution A and the solution B are uniformly mixed to prepare a porous wave-transmitting super-hydrophobic coating; The porous wave-transmitting super-hydrophobic coating is coated on the surface of the substrate, left to stand at room temperature for 0.5 to 2 hours, and then kept at 80 to 150° C. for 2 to 4 hours, thereby preparing a porous wave-transmitting super-hydrophobic coating on the surface of the substrate.

[0029] Wherein, the mass ratio of the wave-transmitting resin to the volatile organic solvent in the wave-transmitting resin solution is 1:0.5-50.

[0030] The mass ratio of the water solvent to the volatile organic solvent in the solution B is (0.1-2): (1-10).

[0031] The coating on the substrate surface is carried out by spraying, brushing or dipping.

[0032] In one embodiment, a method for preparing a porous wave-transmitting super-hydrophobic coating comprises: (1) dissolving 1-10 parts by weight of a wave-transmitting resin in 5-50 parts by weight of a volatile organic solvent, and mechanically stirring for 3-20 minutes; (2) adding 0.1-5 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring for 6-24 hours to obtain a fluorinated wave-transmitting resin solution, thereby imparting low surface energy to the wave-transmitting resin; (3) adding 0.5-6 parts by weight of a curing agent to the fluorinated wave-transmitting resin solution obtained in step (2), and mechanically stirring for 1-10 minutes; (4) dispersing 0.1-2 parts by weight of deionized water in 1-10 parts by weight of a volatile organic solvent, ultrasonically crushing for 5-10 minutes, and maintaining mechanical stirring for 10-20 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 30-60 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed at room temperature for 0.5-2 hours, and then heated at 80-150° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0033] Among them, the wave-transmitting resin is used to improve the wave transmittance, and obtains low surface energy after being treated with a fluorinated modifier. Subsequently, a porous structure is obtained by evaporating the deionized water dispersed in the resin. On the one hand, the coating can obtain superhydrophobicity, and on the other hand, the wave transmittance of the coating can be further improved.

[0034] A third aspect of the present invention provides an application of a porous wave-transmitting super-hydrophobic coating in communication equipment.

[0035] It should be noted that the experimental methods used in the present invention are all conventional methods unless otherwise specified; the reagents and materials used are all commercially available unless otherwise specified.

[0036] Example 1 A method for preparing a porous wave-transmitting super-hydrophobic coating. In this embodiment, the wave-transmitting resin is epoxy resin, the volatile organic solvent is butyl acetate, the fluorinated modifier is perfluorodecyltrichlorosilane, and the curing agent is isocyanate. The preparation steps are as follows: (1) Dissolve 1 part by mass of a wave-transmitting resin in 5 parts by mass of a volatile organic solvent and stir mechanically for 3 minutes; (2) adding 0.1 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring for 6 hours to obtain a fluorinated wave-transmitting resin solution; (3) adding 0.5 parts by weight of a curing agent to the fluorinated wave-transmitting resin solution obtained in step (2) and mechanically stirring for 1 minute; (4) dispersing 0.1 parts by mass of deionized water in 1 part by mass of a volatile organic solvent, ultrasonically crushing for 5 minutes, and maintaining mechanical stirring for 10 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 30 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed in a room temperature environment for 0.5 hours, and then heated at 80° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0037] Figure 1 The optical photo and wettability optical micrograph of the coating show that the coating is uniform and dense, without cracking, bubbling or shedding defects. The contact angle of water droplets on the coating surface is 160.8°, and the rolling angle is 1°. Water droplets falling on the coating surface can easily roll off, without any wetting residue, and the coating surface remains dry.

[0038] Example 2 A method for preparing a porous wave-transmitting super-hydrophobic coating. In this embodiment, the wave-transmitting resin is a polyimide resin, the volatile organic solvent is ethyl acetate, the fluorinated modifier is perfluorodecyltriethoxysilane, and the curing agent is a polyol curing agent. The preparation steps are as follows: (1) dissolving 10 parts by weight of a wave-transmitting resin in 50 parts by weight of a volatile organic solvent and mechanically stirring the mixture for 20 minutes; (2) adding 5 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring the mixture for 24 hours to obtain a fluorinated wave-transmitting resin solution; (3) adding 6 parts by weight of curing agent to the fluorinated wave-transmitting resin solution obtained in step (2) and mechanically stirring for 10 minutes; (4) dispersing 2 parts by mass of deionized water in 10 parts by mass of a volatile organic solvent, ultrasonically crushing for 10 minutes, and maintaining mechanical stirring for 20 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 60 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed in a room temperature environment for 2 hours, and then heated at 150° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0039] Figure 2 The microscopic morphology of the coating shows that the coating has a large number of pore structures with a size of 100-800 nm. Compared with Example 1, in this embodiment, since the fluorinated modifier used is perfluorodecyltriethoxysilane, the chemical activity of its ethoxy group is much lower than that of the chlorine group, resulting in a relatively low degree of modification of the wave-transmitting resin and an increase in surface energy, the superhydrophobicity of the coating is reduced, the water contact angle is reduced to 155°, and the rolling angle is increased to about 5°.

[0040] Example 3 A method for preparing a porous wave-transmitting super-hydrophobic coating. In this embodiment, the wave-transmitting resin is a polytetrafluoroethylene resin, the volatile organic solvent is a hydrofluoroether, the fluorinated modifier is a fluorinated silicone resin, and the curing agent is a boron trifluoride type curing agent. The preparation steps are as follows: (1) dissolving 5 parts by weight of a wave-transmitting resin in 25 parts by weight of a volatile organic solvent and mechanically stirring the mixture for 10 minutes; (2) adding 2.5 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring for 16 hours to obtain a fluorinated wave-transmitting resin solution; (3) adding 3 parts by weight of curing agent to the fluorinated wave-transmitting resin solution obtained in step (2) and mechanically stirring for 5 minutes; (4) dispersing 2 parts by mass of deionized water in 0.1 parts by mass of a volatile organic solvent, ultrasonically crushing for 5 minutes, and maintaining mechanical stirring for 15 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 45 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed in a room temperature environment for 2 hours, and then heated at 120° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0041] Figure 3 is the porosity and specific surface area of ​​the coating. It can be found that the porosity and specific surface area of ​​the coating are only 36% and 1.36 cm 2 / g. Compared with Example 2, since the content of deionized water added in this example is lower, the number of pores dispersed in the coating and volatilized is significantly reduced, that is, the porosity and specific surface area are reduced. In addition, due to the reduced porosity, the roughness of the coating is reduced, resulting in a weakened superhydrophobicity of the coating, a reduced water contact angle of 150°, and an increased rolling angle of 20°.

[0042] Figure 4 The wave transmittance of the porous wave-transmitting super-hydrophobic coating in Example 3 is shown. Due to its porous structure, the average wave transmittance is as high as 92%, which is similar to the naked sample of the antenna cover and much higher than the traditional wave-transmitting resin coating. However, compared with Examples 1 and 2, since the porosity of the coating in this embodiment is lower, the average wave transmittance is relatively low, while the average wave transmittance of the coating in Example 1 is 95%. In summary, the porous wave-transmitting super-hydrophobic coating significantly improves the wave transmittance, and when applied to communication equipment, it will not affect the performance of the equipment itself.

[0043] Example 4 A method for preparing a porous wave-transmitting super-hydrophobic coating. In this embodiment, the wave-transmitting resin is a polyurethane resin, the volatile organic solvent is methyl acetate, the fluorinated modifier is a fluorinated acrylic resin, and the curing agent is a polyamine-type curing agent. The preparation steps are as follows: (1) Dissolve 1 part by weight of wave-transmitting resin in 50 parts by weight of volatile organic solvent and stir mechanically for 3 minutes; (2) adding 0.5 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring for 10 hours to obtain a fluorinated wave-transmitting resin solution; (3) adding 1 part by weight of a curing agent to the fluorinated wave-transmitting resin solution obtained in step (2), and mechanically stirring for 3 minutes; (4) dispersing 2 parts by weight of deionized water in 3 parts by weight of a volatile organic solvent, ultrasonically crushing for 8 minutes, and maintaining mechanical stirring for 12 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 40 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed at room temperature for 2 hours, and then heated at 100° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0044] Figure 5 The self-cleaning optical picture of the coating shows that after dust is deposited on the surface of the coating, the dust can be cleaned by rolling water droplets, showing excellent self-cleaning performance. Compared with Example 1, the content of wave-transmitting resin in this embodiment is lower, the coating has better leveling, and the coating has a thinner, more uniform and flat structure, which is conducive to the self-cleaning property. Therefore, the coating in this embodiment not only has the water droplet self-cleaning property of the coating in Example 1, but also has the condensation dew droplet self-cleaning property, that is, it can collect dew droplets formed by water vapor in the air to actively remove dust, thereby saving manpower and material resources.

[0045] Example 5 A method for preparing a porous wave-transmitting super-hydrophobic coating. In this embodiment, the wave-transmitting resin is a composite resin of polytetrafluoroethylene resin and cyanate resin, the volatile organic solvent is butyl acetate, the fluorinated modifier is perfluorooctyltrichlorosilane, and the curing agent is a polyamine type curing agent. The preparation steps are as follows: (1) dissolving 5 parts by weight of a wave-transmitting resin in 30 parts by weight of a volatile organic solvent and mechanically stirring the mixture for 10 minutes; (2) adding 3 parts by weight of a fluorinated modifier to the solution obtained in step (1), and stirring the mixture for 10 hours to obtain a fluorinated wave-transmitting resin solution; (3) adding 3 parts by weight of curing agent to the fluorinated wave-transmitting resin solution obtained in step (2) and mechanically stirring for 3 minutes; (4) dispersing 1.5 parts by mass of deionized water in 5 parts by mass of a volatile organic solvent, ultrasonically crushing for 10 minutes, and maintaining mechanical stirring for 20 minutes; (5) mixing the solutions obtained in step (3) and step (4), and mechanically stirring for 60 minutes until the two are evenly mixed to obtain a porous wave-transmitting super-hydrophobic coating; (6) The super-hydrophobic coating prepared in step (5) is applied to the surface of different substrates by spraying, brushing or dipping, first placed in a room temperature environment for 2 hours, and then heated at 120° C. for 2 hours to obtain a porous wave-transmitting super-hydrophobic coating.

[0046] Figure 6 As for the environmental stability of the coating, it can be found that after the coating is placed outdoors for more than 180 days, it has experienced sun exposure, wind, sand erosion, rain, blizzard and freezing, and it still maintains super hydrophobicity, and the water contact angle and rolling angle have hardly changed, showing excellent environmental stability. Compared with Example 1, the wave-transmitting resin in this embodiment is in the form of a composite of polytetrafluoroethylene resin and cyanate resin, which improves the weather resistance of the coating.

[0047] In summary, the super-hydrophobic coating provided by the present invention has excellent properties such as water repellency, anti-fouling, and self-cleaning, which can prevent water and dust accumulation in communication equipment, effectively solve the problems of rain attenuation and dust reducing signal transmission performance, and at the same time improve the aesthetics of communication equipment. However, the super-hydrophobic coating itself has a low wave transmittance, which seriously limits its application in communication equipment.

[0048] The present invention provides a porous wave-transmitting super-hydrophobic coating and a preparation method thereof. First, a wave-transmitting resin is dispersed in a volatile organic solvent, and the surface energy of the resin is reduced by a fluorinated modifier. Subsequently, a curing agent and a volatile organic solvent-water mixture after ultrasonic dispersion are added, and the mixture is evenly stirred and applied to the surfaces of different substrates. Finally, the deionized water is removed by heating and the coating is cured to obtain a porous wave-transmitting super-hydrophobic coating. This technology simultaneously gives the coating high wave transmittance and multiple functionalities, including super-hydrophobicity and self-cleaning properties, which significantly improves the working efficiency of communication equipment outdoors. The invention simplifies the preparation process of the super-hydrophobic coating, and has the advantages of simple operation and low cost, and is suitable for large-scale applications.

[0049] The present invention describes preferred embodiments and their effects. However, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A porous wave-transmitting super-hydrophobic coating, characterized in that: The raw materials of the coating include the following components in parts by weight: 1-10 parts of wave-transmitting resin, 0.1-5 parts of fluorinated modifier, 0.5-6 parts of curing agent, 6-60 parts of volatile organic solvent, and 0.1-2 parts of water solvent.

2. The porous wave-transmitting super-hydrophobic coating according to claim 1, characterized in that: The wave-transmitting resin is one or more of polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin and cyanate resin.

3. The porous wave-transmitting super-hydrophobic coating according to claim 1, characterized in that: The volatile organic solvent is one or more of ethyl acetate, butyl acetate, methyl acetate and hydrofluoroether.

4. The porous wave-transmitting super-hydrophobic coating according to claim 1, characterized in that: The fluorinated modifier is one or more of fluorinated siloxane, fluorinated chlorosilane, fluorinated silicone resin, and fluorinated acrylic resin.

5. The porous wave-transmitting super-hydrophobic coating according to claim 1, characterized in that: The curing agent is one or more of a boron trifluoride curing agent, a polyisocyanate curing agent, a polyol curing agent, and a polyamine curing agent.

6. A method for preparing a porous wave-transmitting super-hydrophobic coating according to any one of claims 1 to 5, characterized in that: The following steps are involved: Dissolving the wave-transmitting resin in a volatile organic solvent to prepare a wave-transmitting resin solution; Adding a fluorinated modifier to the wave-transmitting resin solution, mixing and reacting, and obtaining a fluorinated wave-transmitting resin solution; Adding a curing agent to the fluorinated wave-transmitting resin solution and mixing them evenly to obtain a solution A; The aqueous solvent is uniformly dispersed in the volatile organic solvent to prepare solution B; The solution A and the solution B are uniformly mixed to prepare a porous wave-transmitting super-hydrophobic coating; The porous wave-transmitting super-hydrophobic coating is coated on the surface of the substrate, left to stand at room temperature for 0.5 to 2 hours, and then kept at 80 to 150° C. for 2 to 4 hours, thereby preparing a porous wave-transmitting super-hydrophobic coating on the surface of the substrate.

7. The method for preparing a porous wave-transmitting super-hydrophobic coating according to claim 6, characterized in that: The mass ratio of the wave-transmitting resin to the volatile organic solvent in the wave-transmitting resin solution is 1:0.5-50.

8. The method for preparing a porous wave-transmitting super-hydrophobic coating according to claim 6, characterized in that: The mass ratio of the water solvent to the volatile organic solvent in the solution B is (0.1-2): (1-10).

9. The method for preparing a porous wave-transmitting super-hydrophobic coating according to claim 6, characterized in that: The coating on the substrate surface is carried out by spraying, brushing or dipping.

10. Use of the porous wave-transmitting super-hydrophobic coating according to any one of claims 1 to 5 in communication equipment.

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