A moisture-cured quick-drying HFG weather-resistant insulating coating, a preparation method and application thereof

Abstract

The application provides a moisture-curing quick-drying type HFG weather-resistant insulating paint and a preparation method and application thereof, and relates to the technical field of paint. The paint comprises the following raw materials: 40-50% end alkoxy high-branched fluorosilicon resin, 0.5-1.0% N-(beta-aminoethyl)-gamma-aminopropyl trimethoxysilane, 3-5% thermochromic microcapsules, 0.02-0.05% graphene, 0.5-1.5% fluorinated boron nitride nanosheet, 5-10% hollow glass microbead, 3-6% fluorinated spherical SiO2, 0.1-0.3% fluorocarbon surfactant, 2-3% defoaming agent, 2-3% leveling agent, and the rest is propyl propionate / dimethyl carbonate azeotrope solvent. The moisture-curing quick-drying type HFG weather-resistant insulating paint can realize surface drying within 3 minutes through a self-spraying tank mode only by relying on ambient air humidity, has good insulating performance, temperature visualization, high environmental protection, high environmental applicability, and is suitable for the scenes of live-line repair of power equipment and non-power-off spraying.

Description

[0001] A moisture-curing, fast-drying HFG weather-resistant insulating coating, its preparation method and application Technical Field

[0002] This invention relates to the field of coating technology, and in particular to a moisture-curing, fast-drying HFG weather-resistant insulating coating, its preparation method, and its application. Background Technology

[0003] Moisture-curing coatings, such as silane-terminated polyethers and RTV silicone rubber, are widely used in the insulation protection of power facilities due to their high environmental friendliness and the fact that they do not require ultraviolet or heating energy input. However, existing moisture-curing coatings generally have the following drawbacks: 1. The surface drying time of conventional systems is ≥10 minutes, which is difficult to meet the emergency repair requirements of power systems to "spray and energize simultaneously"; 2. Under conditions of low temperature (e.g., high altitude -3℃), low humidity (RH18%), and strong wind (8m / s), the moisture diffusion rate decreases, delaying the curing start of the coating and extending the surface drying time to more than 15 minutes; 3. Lack of condition monitoring function: existing coatings do not have a visual design for operating temperature, and maintenance personnel need to rely on additional equipment such as infrared thermal imagers to inspect the condition of the insulation layer, resulting in low inspection efficiency and high cost; 4. Two-component water-based coatings need to be mixed on-site, resulting in problems such as short application period and complex mixing; baking-curing coatings require additional energy consumption and are not suitable for outdoor scenarios without power. In addition, traditional airless spray guns suffer from problems such as insufficient contact area between atomized particles and moisture and uneven coating thickness distribution in extreme environments, which further restricts the actual application effect of fast-drying coatings.

[0004] Therefore, a moisture-curing, fast-drying, weather-resistant insulating coating has been developed that requires no ultraviolet light, heating, or solvent evaporation, and achieves rapid surface drying solely through ambient air moisture. This solves the problems of slow surface drying, poor environmental adaptability, lack of condition monitoring, and insufficient environmental friendliness of existing coatings. It has practical significance for application in live-line emergency repair scenarios for power equipment. Summary of the Invention

[0005] Therefore, this invention proposes a moisture-curing, fast-drying HFG weather-resistant insulating coating, its preparation method, and its application.

[0006] The technical solution of this invention is implemented as follows:

[0007] A moisture-curing, fast-drying HFG weather-resistant insulating coating comprises, by mass ratio: 40%-50% terminal alkoxy-terminated highly branched fluorosilicone resin, 0.5%-1.0% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, 3%-5% thermochromic microcapsules, 0.02%-0.05% graphene, 0.5%-1.5% fluorinated boron nitride nanosheets, 5%-10% hollow glass microspheres, 3%-6% fluorinated spherical SiO2, 0.1%-0.3% fluorocarbon surfactant, 2%-3% defoamer, 2%-3% leveling agent, and the balance being propyl propionate / dimethyl carbonate azeotropic solvent.

[0008] Furthermore, the main resin of the terminal alkoxy hyperbranched fluorosilicone resin has a branching degree ≥0.45, a molecular weight of 2.5-3.5kDa, a side chain containing -CF3, and a terminal trimethoxysilane.

[0009] Preparation method of terminal alkoxy hyperbranched fluorosilicone resin: 3,3,3-trifluoropropylmethyldimethoxysilane and methyltrimethoxysilane are reacted with p-toluenesulfonic acid catalyst at 60-80℃ for 4-6 h, and the byproduct methanol is removed by vacuum distillation to obtain terminal alkoxy hyperbranched fluorosilicone resin.

[0010] Furthermore, the thermochromic microcapsule has a capsule microsphere structure with a size of 700-1000 nm, a core material of crystal violet lactone-bisphenol A-cetyl alcohol, a color change temperature of 53-57℃, and ΔE>12.

[0011] Preparation method of thermochromic microcapsules: The core material of crystal violet lactone, bisphenol A and hexadecyl alcohol in a mass ratio of 1:2:3 is added to ethyl acetate, and an aqueous solution of gelatin-gum arabic composite wall material is added. After emulsification, the pH is adjusted to 4.0-4.5, the temperature is raised to 50℃, the wall material is cured, washed and dried to obtain thermochromic microcapsules.

[0012] Furthermore, the boron fluoride nanosheets have a thickness of 10-20 nm, a diameter of 400-700 nm, a dielectric constant of ≤3.8, and a breakdown strength of ≥38 kV / mm.

[0013] Preparation method of boron nitride fluoride nanosheets: boron nitride powder is exfoliated in liquid phase (NMP solvent, sonicated for 6 h) to obtain nanosheets, and then reacted with a fluorine-nitrogen mixed gas (fluorine-nitrogen volume ratio of 1:9) at 180℃ for 2 h to obtain boron nitride fluoride nanosheets.

[0014] Furthermore, the hollow glass microspheres have a diameter of 0.8-1.2 μm and a density of 0.15-0.20 g / cm³. 3 .

[0015] Furthermore, the fluorinated spherical SiO2 has a particle size of 150-250 nm.

[0016] Preparation method of fluorinated spherical SiO2: Monodisperse spherical SiO2 was synthesized by the Stöber method, and then surface fluorinated by refluxing 1H,1H,2H,2H-perfluorooctyltriethoxysilane in ethanol for 6 h to obtain fluorinated spherical SiO2 with a contact angle >120°.

[0017] Furthermore, the graphene has fewer than 10 layers.

[0018] A method for preparing a moisture-curing, fast-drying HFG weather-resistant insulating coating, comprising the following steps:

[0019] S1. Graphene, boron fluoride nanosheets and thermochromic microcapsules are added to a propyl propionate / dimethyl carbonate azeotropic solvent and sheared at high speed to obtain a slurry.

[0020] S2. The slurry is sand-milled, and then terminal alkoxy-branched fluorosilicone resin, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, fluorinated spherical SiO2, hollow glass microspheres, fluorocarbon surfactant, defoamer and leveling agent are added. Vacuum stirring and degassing are performed, followed by filtration and filling.

[0021] Furthermore, in step S1, the high-speed shearing speed is 1200-1800 rpm, and the time is 10-15 min.

[0022] Furthermore, in step S2, the sand milling process involves grinding with 0.2-0.4 mm zirconia beads for 10-20 min, controlling the slurry D90 particle size to be ≤1.0 μm; the vacuum degree of the vacuum stirring degassing process is ≤-0.09 MPa, and the time is 5-8 min.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The moisture-curing, fast-drying HFG weather-resistant insulating coating of this invention can achieve surface drying within 3 minutes by relying solely on ambient air moisture and using a self-spraying can. It also has good insulation performance, temperature visibility, high environmental friendliness, and high environmental applicability, making it suitable for live-line repair and uninterrupted power supply spraying scenarios for power equipment.

[0025] This invention achieves surface drying in 2 minutes and 40 seconds at 25°C and 60% RH using a terminal alkoxy-based highly branched fluorosilicone resin matrix and an N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane crosslinking accelerator. Furthermore, it utilizes the dual temperature control of thermochromic microcapsules and few-layer graphene to provide visual feedback, eliminating the need for UV / heating energy input. This solves the problems of slow surface drying, lack of status monitoring, and poor environmental adaptability in existing coatings, demonstrating promising application prospects. Attached Figure Description

[0026] Figure 1This is an electron microscope image of the thermochromic microcapsules of the present invention.

[0027] Figure 2 The images shown are electron microscope (EM) images of the graphene of the present invention, where a is an EEM image at low magnification (1,000x) and b is an EEM image at high magnification (10,000x).

[0028] Figure 3 These are electron microscope (EM) images of the boron fluoride nitride nanosheets of the present invention, where a is an EEM image at magnification (20,000x) and b is an EEM image at magnification (50,000x).

[0029] Figure 4 This is an electron microscope image of the hollow glass microspheres of the present invention.

[0030] Figure 5 The image shown is an electron microscope image of the surface morphology of the coating in Embodiment 1 of the present invention, where a is the surface morphology and b is the cross-section of the coating. Detailed Implementation

[0031] To better understand the technical content of this invention, specific embodiments are provided below to further illustrate the invention.

[0032] Unless otherwise specified, the experimental methods used in the embodiments of this invention are all conventional methods.

[0033] Unless otherwise specified, all materials and reagents used in the embodiments of this invention are commercially available.

[0034] In the embodiments and comparative examples of this invention, the defoamer is BYK-066N and the leveling agent is BYK-333.

[0035] The present invention relates to N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, Sigma-Aldrich, CAS 3069-29-2.

[0036] The graphene (few layers, <10 layers) of this invention was purchased from Nanjing Xianfeng Nanomaterials Technology Co., Ltd.

[0037] The hollow glass microspheres of this invention are the 3M iM30K type.

[0038] The fluorocarbon surfactant of this invention, Capstone® FS-30, was purchased from Chemours.

[0039] The propyl propionate / dimethyl carbonate azeotropic solvent of the present invention is supplied from Sinopharm Chemical Reagent Co., Ltd.; and is mixed at a mass ratio of propyl propionate to dimethyl carbonate of 6:4.

[0040] The preparation method of the terminal alkoxy hyperbranched fluorosilicone resin of the present invention is as follows: 62.5g of 3,3,3-trifluoropropylmethyldimethoxysilane, 27.5g of methyltrimethoxysilane and 30g of anhydrous ethanol are added to a four-necked flask. Under stirring, the temperature is controlled at 30°C, and an ethanol-water solution containing p-toluenesulfonic acid is added dropwise (0.3g of p-toluenesulfonic acid is added to 100mL of ethanol-water solution, with a volume ratio of ethanol to water of 2:1). The addition is carried out for 30min, and the temperature is raised to 70±2°C and refluxed for 5h. During this period, the generated methanol is slowly evaporated through a water separator. The mixture is cooled to 40°C, neutralized with NaHCO3 aqueous solution to pH=7, allowed to stand and separate into layers, and the organic phase is taken. The ethanol and residual monomers are removed by vacuum distillation at 60°C and -0.095MPa to obtain a colorless, transparent, viscous liquid, which is the terminal alkoxy hyperbranched fluorosilicone resin.

[0041] The preparation method of the thermochromic microcapsules of the present invention is as follows: Crystal violet lactone, bisphenol A, and hexanediol in a mass ratio of 1:2:3 are added to ethyl acetate, where the mass of ethyl acetate is 50% of the mass of the core material. The mixture is stirred at 60°C until clear to obtain an oil phase. Gelatin (20% of the mass of the core material) and gum arabic (10% of the mass of the core material) are added to deionized water (twice the mass of the core material) at 60°C and stirred for 1 hour until completely dissolved to obtain an aqueous phase. The oil phase is slowly added to the aqueous phase, and the mixture is sheared at 10,000 rpm for 5 minutes to form an O / W emulsion. The pH is adjusted to 4.2 with 10% acetic acid, and the temperature is raised to 50°C and held for 2 hours to allow the gelatin-gum arabic complex to coagulate into a film on the surface of the oil droplets. 0.5% glutaraldehyde is added for crosslinking for 30 minutes, and the mixture is cooled to 10°C to demulsify. The mixture is centrifuged at 8,000 rpm for 10 minutes, washed three times with water, and freeze-dried to obtain a white powder, which is the thermochromic microcapsule.

[0042] The preparation method of boron nitride fluoride nanosheets of the present invention is as follows: 5g of boron nitride powder (Alfa Aesar, 99%, average particle size 5μm) is added to 200mL of N-methylpyrrolidone, and ultrasonically treated in an ice bath at 40kHz for 6h. After centrifugation at 4000rpm for 30min, the supernatant is collected, and N-methylpyrrolidone is removed by rotary evaporation. The nanosheets are then vacuum dried at 60℃ for 12h to obtain boron nitride nanosheets. The boron nitride nanosheets are placed in a quartz tube furnace, and nitrogen gas (50mL / min) is passed through for 30min to remove oxygen. The temperature is raised to 180℃, and the mixture is switched to a fluorine-nitrogen gas mixture (fluorine-nitrogen volume ratio of 1:9, total flow rate of 500mL / min) for 2h. After cooling, the nanosheets are washed three times with anhydrous ethanol and vacuum dried at 60℃ to obtain boron nitride fluoride nanosheets.

[0043] The preparation method of fluorinated spherical SiO2 of the present invention is as follows: Monodisperse spherical SiO2 is synthesized by the Stöber method (20 mL of deionized water and 80 mL of anhydrous ethanol are mixed, 8 mL of 28% ammonia water is added and stirred for 10 min, 10 g of tetraethyl orthosilicate is added dropwise, the mixture is reacted at room temperature for 6 h, centrifuged, washed with ethanol, and dried at 60 °C). 10 mg of SiO2 is dispersed in 100 mg of toluene and sonicated for 30 min. 2 g of 1H,1H,2H,2H-perfluorooctyltriethoxysilane is added, and the mixture is refluxed at 110 °C for 6 h under nitrogen protection. After cooling, the mixture is centrifuged, washed three times with alternating toluene and ethanol, and dried at 80 °C for 12 h.

[0044] Example 1

[0045] Formulation of moisture-curing, fast-drying HFG weather-resistant insulating coating:

[0046]

[0047] The preparation method of the above-mentioned moisture-curing, fast-drying HFG weather-resistant insulating coating includes the following specific steps:

[0048] S1. Add graphene, boron fluoride nanosheets and thermochromic microcapsules to a propyl propionate / dimethyl carbonate azeotropic solvent and shear at 1500 rpm for 13 min to obtain a slurry.

[0049] S2. Use 0.3mm zirconia beads to sand-mill the slurry for 15min, controlling the slurry D90 particle size ≤1.0μm. Then add terminal alkoxy hyperbranched fluorosilicone resin, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, fluorinated spherical SiO2, hollow glass microspheres, fluorocarbon surfactant, BYK-066N and BYK-333. Stir and degas under vacuum (≤-0.09MPa) for 7min. Filter through a 200-mesh stainless steel filter, put into a self-spraying can, fill with inert propellant (nitrogen or compressed air), and seal for later use.

[0050] Example 2

[0051] Formulation of moisture-curing, fast-drying HFG weather-resistant insulating coating:

[0052]

[0053] The preparation method of the above-mentioned moisture-curing, fast-drying HFG weather-resistant insulating coating includes the following specific steps:

[0054] S1. Add graphene, boron fluoride nanosheets and thermochromic microcapsules to a propyl propionate / dimethyl carbonate azeotropic solvent and shear at 1200 rpm for 10 min to obtain a slurry.

[0055] S2. Use 0.2-0.4mm zirconia beads to sand-mill the slurry for 10min, controlling the slurry D90 particle size ≤1.0μm. Then add terminal alkoxy hyperbranched fluorosilicone resin, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, fluorinated spherical SiO2, hollow glass microspheres, fluorocarbon surfactant, BYK-066N and BYK-333. Stir and degas under vacuum (≤-0.09MPa) for 5min. Filter through a 200-mesh stainless steel filter, put into a self-spraying can, fill with inert propellant (nitrogen or compressed air), and seal for later use.

[0056] Example 3

[0057] Formulation of moisture-curing, fast-drying HFG weather-resistant insulating coating:

[0058]

[0059] The preparation method of the above-mentioned moisture-curing, fast-drying HFG weather-resistant insulating coating includes the following specific steps:

[0060] S1. Add graphene, boron fluoride nanosheets and thermochromic microcapsules to a propyl propionate / dimethyl carbonate azeotropic solvent and shear at 1800 rpm for 15 min to obtain a slurry.

[0061] S2. Use 0.4mm zirconia beads to sand-mill the slurry for 20 minutes, controlling the slurry D90 particle size to be ≤1.0μm. Then add terminal alkoxy hyperbranched fluorosilicone resin, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, fluorinated spherical SiO2, hollow glass microspheres, fluorocarbon surfactant, BYK-066N and BYK-333. Stir and degas under vacuum (≤-0.09MPa) for 8 minutes. Filter through a 200-mesh stainless steel filter, put into a self-spraying can, fill with inert propellant (nitrogen or compressed air), and seal for later use.

[0062] Comparative Example 1

[0063] The difference from Example 1 is that the terminal alkoxy-terminated highly branched fluorosilicone resin is replaced with linear polyether resin with a branching degree of <0.1, while the rest is the same as Example 1.

[0064] Comparative Example 2

[0065] The difference from Example 1 is that N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane is missing; otherwise, it is the same as Example 1.

[0066] Comparative Example 3

[0067] The difference from Example 1 is that it lacks thermochromic microcapsules, but otherwise it is the same as Example 1.

[0068] Comparative Example 4

[0069] The difference from Example 1 is that graphene is absent; otherwise, it is the same as Example 1.

[0070] Comparative Example 5

[0071] The difference from Example 1 is that the surface fluorinated spherical SiO2 is replaced with SiO2, otherwise it is the same as Example 1.

[0072] Comparative Example 6

[0073] The difference from Example 1 is that the propyl propionate / dimethyl carbonate azeotropic solvent is replaced with ethyl acetate, otherwise it is the same as Example 1.

[0074] Comparative Example 7

[0075] The difference from Example 1 is that hollow glass microspheres are missing; otherwise, they are the same as in Example 1.

[0076] Test Example 1

[0077] Under normal conditions, at a temperature of 25°C and a relative humidity of 60%, the coatings prepared in Examples 1-3 and Comparative Examples 1-7 were sprayed using a spray can, with a wet film thickness of 50 μm, and allowed to stand at room temperature. Surface drying time (tack-free), dielectric strength, and pinhole rate were tested.

[0078] The results are shown in Table 1.

[0079] Table 1

[0080]

[0081] As shown in Table 1, the coatings prepared in Examples 1-3 of this invention can achieve rapid drying within 3 minutes at 25℃ and RH 60%, and have good insulation properties. After heating at 55℃, the coating color changes from dark blue to bright pink (ΔE=13.2). The infrared thermometer shows an additional temperature rise of 2.1℃ in the hot spot area, and the temperature rise under sunlight is ≤10℃, reducing false triggering of discoloration. In Comparative Example 1, the terminal alkoxy-terminated highly branched fluorosilicone resin was replaced with linear polyether resin. The branched structure of the main chain affected the crosslinking density and surface drying speed, resulting in a longer surface drying time. Comparative Example 2 lacked N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, lacking amine catalysis, resulting in a decreased moisture reaction rate and a longer surface drying time. Comparative Example 3 lacked thermochromic microcapsules. Surface drying was normal, but the lack of thermochromic microcapsules led to the loss of temperature visualization function. Comparative Example 4 lacked graphene. Although the discoloration was visible, there was no amplification effect in infrared thermometry. In Comparative Example 5, replacing the surface-fluorinated spherical SiO2 with SiO2 increased surface tension, slowed moisture penetration, and prolonged surface drying time. In Comparative Example 6, replacing the propyl propionate / dimethyl carbonate azeotropic solvent with ethyl acetate resulted in a mismatch in evaporation rates, delayed film formation, increased susceptibility to cracking, and prolonged surface drying time. In Comparative Example 7, lacking hollow glass microspheres, the temperature rise during sunlight exposure reached 18°C, approaching the discoloration threshold, leading to decreased reliability.

[0082] Test Example 2

[0083] Under extreme conditions—at an altitude of 3800m (oxygen concentration 14%), a temperature of -3℃, a relative humidity of 18%, and a wind speed of 8m / s—the coatings prepared in Examples 1-3 were sprayed using a spray can, achieving a wet film thickness of 50μm. A moisture-accelerating spray gun was used to compensate for the moisture temperature, bringing it to 25℃. The coatings were then allowed to stand. Surface drying time (no tackiness to the touch), dielectric strength, and pinhole rate were tested.

[0084] The results are shown in Table 2.

[0085] Table 2

[0086]

[0087] As can be seen from the table above, the coatings prepared in Examples 1-3 of this invention achieve rapid drying within 3 minutes at -3℃ and RH 18%, and have good insulation properties. After heating at 55℃, the color change response is normal (ΔE=12.5), and the infrared thermometer reading is accurate (additional +2℃).

[0088] Comparative Examples 1–7 generally exhibited problems such as surface drying time > 8 min, pinhole rate > 1.5%, and some samples failing to form a film under extreme conditions, therefore they were not included in the table.

[0089] Figure 1 This is an electron microscope image of the thermochromic microcapsules used in this invention. Figure 2 This is an electron microscope image of the graphene used in this invention. Figure 3 This is an electron microscope image of the boron fluoride nitride nanosheets used in this invention. Figure 4 This is an electron microscope image of the hollow glass microspheres used in this invention.

[0090] Figure 5 The scanning electron microscope image of the surface morphology of the coating prepared in Example 1 of the present invention shows that the coating surface is dense and uniform, without obvious cracks or large particle aggregation.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A moisture-curing, fast-drying HFG weather-resistant insulating coating, characterized in that, By mass ratio, the following raw materials are included: 40%-50% terminal alkoxy-terminated highly branched fluorosilicone resin, 0.5%-1.0% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, 3%-5% thermochromic microcapsules, 0.02%-0.05% graphene, 0.5%-1.5% fluorinated boron nitride nanosheets, 5%-10% hollow glass microspheres, 3%-6% fluorinated spherical SiO2, 0.1%-0.3% fluorocarbon surfactant, 2%-3% defoamer, 2%-3% leveling agent, balance propyl propionate / dimethyl carbonate azeotropic solvent; The main resin of the terminal alkoxy-terminated highly branched fluorosilicone resin has a branching degree ≥0.45 and a molecular weight of 2.5-3.5 kDa.

2. The moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 1, characterized in that, The thermochromic microcapsules have a capsule-like microsphere structure with a size of 700-1000 nm. The core material is crystal violet lactone-bisphenol A-cetyl alcohol, the color-changing temperature is 53-57℃, and ΔE>12.

3. The moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 1, characterized in that, The boron fluoride nanosheets have a thickness of 10-20 nm, a diameter of 400-700 nm, a dielectric constant of ≤3.8, and a breakdown strength of ≥38 kV / mm.

4. The moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 1, characterized in that, The hollow glass microspheres have a diameter of 0.8-1.2 μm and a density of 0.15-0.20 g / cm³. 3 .

5. The moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 1, characterized in that, The fluorinated spherical SiO2 has a particle size of 150-250 nm.

6. The moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 1, characterized in that, The graphene has fewer than 10 layers.

7. A method for preparing a moisture-curing, fast-drying HFG weather-resistant insulating coating according to any one of claims 1-6, characterized in that, The specific steps include: S1. Graphene, boron fluoride nanosheets and thermochromic microcapsules are added to a propyl propionate / dimethyl carbonate azeotropic solvent and sheared at high speed to obtain a slurry. S2. The slurry is sand-milled, and then terminal alkoxy-branched fluorosilicone resin, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, fluorinated spherical SiO2, hollow glass microspheres, fluorocarbon surfactant, defoamer and leveling agent are added. Vacuum stirring and degassing are performed, followed by filtration and filling.

8. The preparation method of the moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 7, characterized in that, In step S1, the high-speed shearing speed is 1200-1800 rpm and the time is 10-15 min.

9. The preparation method of the moisture-curing, fast-drying HFG weather-resistant insulating coating as described in claim 7, characterized in that, In step S2, the sand milling process involves grinding with 0.2-0.4 mm zirconia beads for 10-20 min to control the slurry D90 particle size to ≤1.0 μm; the vacuum stirring and degassing process involves a vacuum degree of ≤-0.09 MPa for 5-8 min.

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