Multifunctional heat-insulation and heat-preservation oily paint, preparation method and use method thereof

Abstract

The invention relates to the technical field of coatings, in particular to a multifunctional heat-insulation and heat-preservation oily coating, a preparation method and a use method thereof.The multifunctional heat-insulation and heat-preservation oily coating is prepared from, by weight, 5-30 parts of a main agent, 10-30 parts of resin, 5-30 parts of auxiliaries, 10-50 parts of a diluent, 2-20 parts of pigment filler and 7-8 parts of a curing agent, and the ratio of the main agent to the resin is 13: (30-35). Compared with the prior art, by controlling the ratio of the main agent to the resin, the problems that a layer of varnish needs to be coated before construction to increase the interlayer adhesive force and then the heat-insulating coating is coated due to poor adhesive force of the existing heat-insulating coating on the premise of ensuring the heat-insulating property are solved; and after the two steps are completed, a layer of finish paint with a required color needs to be attached, so that the working procedures are complicated, and the manufacturing period is long.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, in particular to a multifunctional heat-insulating oily coating, a preparation method and a use method thereof. Background Art

[0002] Thermal insulation coating is a new type of thermal insulation coating that combines reflection and radiation. It prevents heat conduction through its own coating structure and thickness, reduces the temperature inside and on the coating surface, and thus maintains a certain temperature for a long time at a certain temperature, playing a role in heat insulation and heat preservation. Thermal insulation coatings on the market have functions such as cooling, thin layer, waterproof, and moisture-proof. The coating process is described in the patent "A coating process for building exterior walls with silicon salt filler exterior insulation coatings" with application number CN201410471948.5:

[0003] Base repair: Use 1:2.5 polymer cement mortar to repair the missing edges and corners and holes of the base;

[0004] Hollowing: remove all hollow parts, clean them up, and make a new base for repair;

[0005] Cleaning: Grease: Use neutral detergent to clean; Mortar: Use a shovel or scraper to remove mold, then rinse with clean water and dry;

[0006] Primer and leveling: Use thin batches and remove surface dust immediately after the operation;

[0007] Bottom sealing: first roll a layer of bottom sealing paint on the base layer to increase the bonding strength with the base layer and prevent alkali floating;

[0008] First coat of paint: large area of ​​wall is painted with plush roller, and prominent lines of wall are painted with paint brush and paint brush;

[0009] Second coat of paint: Use a paintbrush.

[0010] In order to ensure the effectiveness of existing thermal insulation coatings, due to the poor adhesion of the coating itself, a layer of primer needs to be applied before construction to increase the interlayer adhesion, and then the thermal insulation coating needs to be applied. After these two steps, some coatings also need to be attached with a layer of topcoat of the required color, which makes the process complicated and the production period long. Summary of the invention

[0011] The present invention aims to provide a multifunctional thermal insulation oily paint, a preparation method and a use method thereof, which are mainly used to solve the technical problems that the existing thermal insulation paint needs to be coated with a layer of varnish before construction to increase the interlayer adhesion, and then the thermal insulation paint is coated. After these two steps are completed, a layer of topcoat of the required color needs to be attached, resulting in complicated procedures and long production period due to poor adhesion of the existing thermal insulation paint.

[0012] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0013] A multifunctional heat-insulating oily paint comprises, by weight: 5-30 parts of a main agent, 10-30 parts of a resin, 5-30 parts of an auxiliary agent, 10-50 parts of a diluent, 2-20 parts of a pigment and filler, and 7-8 parts of a curing agent, wherein, by weight, the ratio of the main agent to the resin is 13:30-35.

[0014] Preferably, the main agent is one or more of aerogel, glass microspheres, and ceramic microspheres;

[0015] The aerogel is one or more of silicon dioxide aerogel, carbon aerogel, graphene oxide aerogel, and fullerene aerogel;

[0016] The glass microspheres are one or more of hollow glass microspheres, hollow glass microspheres, lightweight glass microspheres, and borosilicate glass microspheres;

[0017] The ceramic micro-beads are one or more of composite ceramic micro-beads, hollow ceramic micro-beads and Bohr micro-beads.

[0018] Preferably, the resin is one or more of super high gloss acrylic resin, oily acrylic resin, epoxy vinyl resin, phenolic resin, epoxy polyurethane resin, epoxy modified silicone resin, amino resin, urea formaldehyde resin, polyimide resin, polyethylene resin, polyphenylene sulfide resin, polyimide resin, butyl rubber resin, polysulfide rubber resin, silicone rubber resin, UV curing rubber resin, and polypropylene resin.

[0019] Preferably, the auxiliary agent is one or more of a retention agent, a dry strength agent, a wet strength agent, a softener, a light stabilizer, a mildew preventer, a softener, a dispersant, a colorant, a thickener, a flame retardant, a matting powder, a plasticizer, an accelerator, a crosslinking agent, a coupling agent, a drying agent, a leveling agent, an anti-skinning agent, an anti-settling agent, a wetting agent, and a thickener.

[0020] Preferably, the accelerator is any one of DMP-30, ER-04A, LITE3060, and BMDA.

[0021] Preferably, the pigment filler is one or more of titanium dioxide, chrome green, red iron oxide, carbon black, medium chrome yellow, medium chrome green, iron yellow, phthalocyanine blue, calcium carbonate, barium sulfate, talc, bentonite, quartz powder, kaolin, and mica powder.

[0022] Preferably, the diluent is one or more of toluene, xylene, dibutyl phthalate, n-butyl phthalate, isobutyl phthalate, sec-butyl phthalate, butyl stearate, o-xylene, ethyl acetate, butyl butyrate, isoamyl butyrate, butyl acetate, diisoamyl phthalate, diester, N,N-dimethylformamide, diisophthalate, isocyanate, ethanol, ethylene glycol, glycerol, methanol, n-butanol, propylene glycol, vinyl alcohol, and butyl ether.

[0023] Preferably, in terms of weight, the ratio of the main agent to the resin is 13:35.

[0024] Beneficial effects of this program:

[0025] (1) In this solution, the components work synergistically, so that the final multifunctional thermal insulation oily paint has good adhesion while ensuring good thermal insulation effect. See the adhesion test data of Examples 1-3, the adhesion is greater than 7MPa (the standard document stipulates that the adhesion of the paint must be greater than 5MPa), while the adhesion of the same type of products, whether water-based paint or oil-based paint, can only reach 1.6-3.4MPa. It can be proved that the adhesion of the multifunctional thermal insulation oily paint configured by this formula is greatly improved. Therefore, this product does not need to be used in conjunction with a primer. Only the paint of this product can be firmly combined with the sprayed substrate by spraying, which shortens the use process and solves the problem that the existing thermal insulation paint has poor adhesion. Therefore, a layer of varnish needs to be applied before construction to increase the interlayer adhesion, and then the thermal insulation paint needs to be applied. After these two steps are completed, a layer of topcoat of the required color needs to be applied, resulting in complex procedures and long production period.

[0026] (3) This product combines pigments and fillers directly with the paint itself, reducing the spraying process of spraying color topcoat on the paint surface, making the paint more convenient to use.

[0027] A method for preparing a multifunctional heat-insulating oily paint comprises the following steps:

[0028] S1: Add 10-30 parts of resin, 5-30 parts of additives, 10-50 parts of diluents, and 2-20 parts of pigments and fillers into a mixing barrel, and mix evenly with a disperser;

[0029] S2: Slowly add aerogel into the batching barrel and stir for 25-35 minutes to disperse evenly. The stirring speed of the dispersing mixer is 10-300rpm;

[0030] S3: After the aerogel is evenly dispersed, slowly add glass beads into the batching bucket and continue to stir and disperse for 25-35 minutes at 300-500rpm;

[0031] S4: Add curing agent into the mixing barrel and continue stirring for 1-2 minutes before use.

[0032] Beneficial effects of this program:

[0033] (1) After testing, this solution adjusted the order of adding all components. The aerogel was added first and stirred and dispersed, and then the glass beads were added. This allowed the glass beads and aerogel to be arranged neatly. Both the glass beads and the aerogel are materials with low thermal conductivity, which can significantly improve the overall thermal insulation effect of the product.

[0034] (2) In step S2, the aerogel is stirred and dispersed by low-speed stirring of 10-300 rpm. Low-speed stirring is conducive to better dispersion of the aerogel. If the stirring speed is too high, the porous structure of the aerogel structure will be destroyed, and the thermal insulation effect of the product will be weakened. After adding the glass microspheres, high-speed stirring is used, which can make it easier for the glass microspheres to cover the micropores of the aerogel, thereby achieving a better thermal insulation effect.

[0035] (3) In step S3, the aerogel is stirred and dispersed by high-speed stirring at 300-500 rpm, so that the aerogel and the glass microspheres can be better filled and arranged together, thereby improving the thermal insulation effect of the product; specifically, the glass microspheres are tiny spheres with a large sphericity and a ball bearing effect, which can improve fluidity and reduce the viscosity and internal stress of the resin mixture. They have the characteristics of light weight, large volume, low thermal conductivity, high compressive strength, and good fluidity. They have the smallest specific surface area and low oil absorption rate. They can have good dispersibility in the mixture and are easily compressed and fused. Therefore, they have high filling performance. The isotropy and high filling amount of the glass microspheres make the product size very stable and can reduce shrinkage and warping. If the filling ratio is appropriate, the toughness of the product is significantly improved, the impact resistance is significantly improved, and the surface hardness is enhanced;

[0036] At the same time, due to its high compressive strength, good fluidity and good filling performance, it is added last, and high-speed, high-shear stirring equipment is used to disperse it and merge it with the aerogel, so that it can be better and more tightly filled with the aerogel, which not only improves the thermal insulation performance, but also increases the hardness.

[0037] A method for using a multifunctional heat-insulating oily paint comprises the following steps:

[0038] S1: Apply the multifunctional thermal insulation oily paint on the substrate surface;

[0039] S2: placing the substrate coated with the multifunctional heat-insulating oily paint in step S1 into an oven at 50-110° C. and baking for 5-15 minutes;

[0040] S3: Repeat the operations of step S1 and step S2 on the surface of the substrate after baking in step S2, apply the multifunctional thermal insulation oily paint on the surface of the substrate several times until the coating thickness reaches 3.5-4mm, and then grind and polish the surface of the substrate until the coating thickness reaches 2.8-3.2mm.

[0041] Beneficial effects of this solution: In this solution, the adhesion between the product and the substrate and the thermal insulation effect are improved through a multi-layer coating process, and cracking of the coating surface can be effectively avoided. DETAILED DESCRIPTION

[0043] A multifunctional heat-insulating oily paint comprises, by weight, 5-30 parts of a main agent, 10-30 parts of a resin, 5-30 parts of an auxiliary agent, 10-50 parts of a diluent, and 2-20 parts of a pigment and filler.

[0044] The main agent, resin, auxiliary agent, diluent, pigment and filler are preferably one or more of the multiple components, wherein the ratio of the main agent to the resin is 13:30-35.

[0045] Based on the formula of the multifunctional thermal insulation oily coating, a preparation method of the multifunctional thermal insulation oily coating is proposed, comprising the following steps:

[0046] S1: Add 10-30 parts of resin, 5-30 parts of additives, 10-50 parts of diluents, and 2-20 parts of pigments and fillers into a mixing barrel, and mix evenly with a disperser;

[0047] S2: Slowly add aerogel into the batching barrel and stir for 25-35 minutes to evenly disperse it. The stirring speed of the dispersing mixer is 10-300rpm;

[0048] S3: After the aerogel is evenly dispersed, slowly add glass beads into the batching bucket and continue to stir and disperse for 25-35 minutes, and the stirring speed of the dispersing mixer is 300-500rpm;

[0049] S4: Add curing agent into the mixing barrel and continue stirring for 1 minute. Use immediately after mixing.

[0050] The disperser mixer model is FSJ-A-350, produced by Yixing Longming Machinery Co., Ltd. The equipment can freely adjust the stirring speed of the equipment, the low speed zone is 10-300rpm, and the high speed zone is 300-500rpm.

[0051] In order to exert better comprehensive performance, the multifunctional thermal insulation oily paint in this scheme needs to be used in accordance with a method for using the multifunctional thermal insulation oily paint, including the following steps:

[0052] S1: Apply the multifunctional thermal insulation oily paint on the substrate surface;

[0053] S2: placing the substrate coated with the multifunctional heat-insulating oily paint in step S1 into an oven at 50-110° C. and baking for 5-15 minutes;

[0054] S3: Repeat the operations of step S1 and step S2 on the surface of the substrate after baking in step S2, apply the multifunctional thermal insulation oily paint on the surface of the substrate several times until the coating thickness reaches 3.5-4mm, and then grind and polish the surface of the substrate until the coating thickness reaches 3mm.

[0055] This product adjusts the comprehensive performance of the coating itself in terms of formula and preparation method. While ensuring the thermal insulation performance of the product, the adhesion of the product is improved, thereby simplifying the use of the product. It can be directly applied to the surface of the substrate without the need for primer and topcoat. At the same time, with special usage methods, the excellent performance of the coating itself is fully exerted, so that the coating product can be firmly combined with the substrate, showing good adhesion and thermal insulation effects. This solves the problem that the existing thermal insulation coating has poor adhesion, so a layer of varnish needs to be applied before construction to increase the interlayer adhesion, and then the thermal insulation coating needs to be applied. After these two steps are completed, a layer of topcoat of the required color needs to be attached, resulting in complicated procedures and long production periods.

[0056] Based on the above scheme, the following multiple embodiments and comparative examples are proposed to show the specific ingredients and detailed ratios of each component, the specific parameters in the preparation method, and the monitoring data of the corresponding embodiments and comparative examples, so as to fully illustrate the many beneficial effects of the product.

[0057] Among them, each embodiment mainly has different components and different distribution ratios of each component, which are as follows:

[0058] Embodiment 1-embodiment 3:

[0059] In Examples 1-3, the distribution ratios of each group are shown in Table 1 below:

[0060]

[0061] Table 1 The specific components of the auxiliary agents used in Examples 1, 2, and 3 are as follows: Cross-linking agent: BZA

[0062] Accelerator: DMP-30

[0063] Coupling agent: kh550

[0064] Anti-settling agent: BYK-405

[0065] Leveling agent: BYK-333

[0066] Dispersant: BYK-167

[0067] Antifungal agent: LF-1

[0068] Curing agent: T31

[0069] Matting powder: SJ-560

[0070] In step S2, the stirring speed of the dispersing mixer is 150 rpm; in step S3, the stirring speed of the dispersing mixer is 400 rpm;

[0071] Embodiment 4-6:

[0072] The difference between Example 4-6 and Example 1 is that different accelerators are used, as shown in Table 2:

[0073] Example Example 4 Example 5 Example 6 Accelerator ER-04A LITE3060 BMDA

[0074] Table 2

[0075] Comparative Examples 1-3:

[0076] The difference between Comparative Examples 1-3 and Example 1 is that different accelerators are used, as shown in Table 3:

[0077] Comparative Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Accelerator 5090 R-0592 R-1085

[0078] Table 3

[0079] Comparative Examples 4-6:

[0080] The difference between Comparative Examples 4-6 and Example 1 is that in the method for preparing a multifunctional heat-insulating oily coating, in step S2 and step S3, the stirring speed of the dispersing mixer is different, as shown in Table 4:

[0081] Comparative Example Comparative Example 4 Comparative Example 5 Comparative Example 6 Step S2 Speed 150rpm 400rpm 400rpm Step S3 Speed 150rpm 400rpm 150rpm

[0082] Table 4

[0083] Comparative Examples 7-11:

[0084] The difference between Comparative Examples 7-11 and Example 1 is that the ratio of the main agent to the resin is different, as shown in Table 5:

[0085]

[0086] Table 5

[0087] The above examples and comparative examples were subjected to the following performance tests:

[0088] 1. Test the adhesion of the sample pull-off method for all embodiments and comparative examples: wipe the spindle and apply AB glue on the surface of the sample to make it fit evenly on the sample, wipe off the excess AB glue, and then bake it in a 70°C oven for two hours, and then test it with a test instrument. According to the method specified in GB / T5210 (≥5MPa), the above operation test was repeated on the 1st, 4th, 7th and 30th days, and the results are shown in Table 6:

[0089]

[0090] Table 6

[0091] In NORSOK M501, the adhesion test for organic coatings stipulates that the anti-corrosion coating system is usually required to reach at least 5.0MPa.

[0092] The adhesion requirement for coating systems in ISO 12944-6 is to be at least 5 MPa according to the ISO 4624 pull-off adhesion test.

[0093] This scheme also evaluates the adhesion according to the above standards, and the adhesion should be greater than 5MPa.

[0094] According to the test results:

[0095] The test data of Examples 1-6 are all greater than 5MPa, which meets the standard requirements;

[0096] The following analysis was performed with reference to Comparative Examples 1-10 and all the embodiments:

[0097] (1) Several commonly used accelerators on the market were selected in Comparative Examples 1-3. However, through the comparison of adhesion data, their adhesion was less than that of Examples 1-4, and the adhesion of Examples 4-6 was also significantly less than that of Examples 1-3, proving that among many types of accelerators, DMP-30 is more suitable for the present coating, so that the present coating exhibits excellent adhesion strength;

[0098] (2) Comparative Examples 4-6 mainly show the adhesion of the finished products of aerogel and glass microspheres at different stirring speeds, and the adhesion is not greater than 5, proving that the rotation speed has a certain influence on the combination of glass microspheres and aerogels, thereby affecting the final adhesion effect of the finished product;

[0099] 2. Test insulation data. The insulation performance test method is as follows: after the front coating surface is heated to the measured temperature and reaches thermal equilibrium, a thermocouple is used at the center of the stainless steel on the back to test the insulation temperature. The sample is placed to test the insulation effect at 80°C. The insulation performance test requires that the 3mm thickness can isolate the 80°C hot surface temperature to below 70°C. The sample is placed on an 80°C insulation constant temperature table to test the insulation temperature. The data results are recorded once a minute until the temperature does not change much. The test results of Examples 1-3 and Comparative Examples 7-11 are shown in Table 7 below, and the test results of Examples 1-6 are shown in Table 8 below:

[0100]

[0101]

[0102] Table 7

[0103]

[0104]

[0105]

[0106] Table 8

[0107] According to the test results:

[0108] Comparative Examples 7-8, Examples 1-3, and Comparative Examples 9-11 are arranged in a gradually decreasing ratio of the main agent to the resin. It can be seen from their thermal insulation performance test data that:

[0109] (1) It can be observed from Table 7 that, from Example 1, Comparative Examples 9, 10, and 11, the thermal insulation performance of the coating decreases as the amount of resin added gradually increases, and increases as the concentration of the main agent increases. It can be judged that the concentration of the main agent has a major influence on the thermal insulation performance of the coating;

[0110] (2) The main agent mainly affects the thermal insulation performance of the product. The higher the concentration of the main agent, the better the thermal insulation effect of the product (as can be seen from Example 1, Comparative Examples 9, 10, and 11);

[0111] The better the concentration of the resin, the better the adhesion performance (as can be seen from the data from left to right in Table 7), but the concentration of the main agent will be diluted, causing the thermal insulation performance of the product to decline. Observing the data in the entire table, when the amount of the main agent added exceeds the critical value, that is, the ratio of the main agent to the resin is 13:35, the constant temperature cannot be reduced below 59.7. Therefore, based on comprehensive judgment, the best ratio of the main agent to the resin is 13:35, which can make the finished coating maintain excellent thermal insulation and adhesion performance at the same time, which is the best embodiment.

[0112] (3) By observing Comparative Example 7, Comparative Example 8, Example 2, Example 3, and Example 1, when the concentration of the main agent is gradually increased and exceeds the critical point of 13:35, the insulation temperature of 60 minutes does not continue to decrease, but is above 59.7°C with a very small temperature difference, and even slowly increases with the increase of the main agent concentration. It can be determined that the optimal ratio of the main agent to the resin is 13:35, which can ensure good adhesion and thermal insulation properties at the same time.

[0113] (4) As shown in Table 8, different promoters are used in Examples 1-3 and 4-6. The thermal insulation temperature test of Examples 4-6 shows that the change of promoter has little effect on the thermal insulation data, and the main component that affects the thermal insulation performance is still the main agent.

[0114] in conclusion:

[0115] 1. The adhesion in Examples 1-6 is greater than 5. As an optional solution, it solves the technical problem that the existing thermal insulation coating has poor adhesion, so it is necessary to apply a layer of varnish before construction to increase the interlayer adhesion, and then apply the thermal insulation coating. After these two steps are completed, a layer of topcoat of the required color is required, which leads to complicated procedures and long production period.

[0116] 2. Embodiment 1 is the best embodiment, and its thermal insulation performance and adhesion both meet the requirements, and it has comprehensive performance with reliable guarantee.

[0117] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multifunctional heat-insulating oily paint, characterized in that: Calculated by weight, it includes: 5-30 parts of main agent, 10-30 parts of resin, 5-30 parts of auxiliary agent, 10-50 parts of diluent, 2-20 parts of pigment and filler, and 7-8 parts of curing agent. Calculated by weight, the ratio of the main agent to the resin is 13:30-35.

2. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The main agent is one or more of aerogel, glass microspheres, and ceramic microspheres; The aerogel includes one or more of silicon dioxide aerogel, carbon aerogel, graphene oxide aerogel, and fullerene aerogel; The glass microspheres include one or more of hollow glass microspheres, hollow glass microspheres, lightweight glass microspheres, and borosilicate glass microspheres; The ceramic micro-beads include one or more of composite ceramic micro-beads, hollow ceramic micro-beads, and Bohr micro-beads.

3. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The resin is one or more of super high gloss acrylic resin, oily acrylic resin, epoxy vinyl resin, phenolic resin, epoxy polyurethane resin, epoxy modified silicone resin, amino resin, urea formaldehyde resin, polyimide resin, polyethylene resin, polyphenylene sulfide resin, polyimide resin, butyl rubber resin, polysulfide rubber resin, silicone rubber resin, UV curing rubber resin, and polypropylene resin.

4. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The auxiliary agent is one or more of a retention agent, a dry strength agent, a wet strength agent, a softener, a light stabilizer, a mildew preventer, a softener, a dispersant, a colorant, a thickener, a flame retardant, a matting powder, a plasticizer, an accelerator, a crosslinking agent, a coupling agent, a drying agent, a leveling agent, an anti-skinning agent, a curing agent, an anti-settling agent, a wetting agent, and a thickener.

5. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The accelerator is any one of DMP-30, ER-04A, LITE3060 and BMDA.

6. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The pigment filler is one or more of titanium dioxide, chrome green, red iron oxide, carbon black, medium chrome yellow, medium chrome green, iron yellow, phthalocyanine blue, calcium carbonate, barium sulfate, talcum powder, bentonite, quartz powder, kaolin, and mica powder.

7. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: The diluent is one or more of toluene, xylene, dibutyl phthalate, n-butyl phthalate, isobutyl phthalate, sec-butyl phthalate, butyl stearate, o-xylene, ethyl acetate, butyl butyrate, isoamyl butyrate, butyl acetate, diisoamyl phthalate, diester, N,N-dimethylformamide, diisophthalate, isocyanate, ethanol, ethylene glycol, glycerol, methanol, n-butanol, propylene glycol, vinyl alcohol, and butyl ether.

8. The multifunctional heat-insulating oily paint according to claim 1, characterized in that: In terms of weight, the ratio of the main agent to the resin is 13:

35.

9. A method for preparing the multifunctional heat-insulating oily paint according to any one of claims 1 to 8, characterized in that: The steps include: S1: Add 10-30 parts of resin, 5-30 parts of additives, 10-50 parts of diluents, and 2-20 parts of pigments and fillers into a mixing barrel, and mix evenly with a disperser; S2: Slowly add aerogel into the batching barrel and stir for 25-35 minutes to disperse evenly. The stirring speed of the dispersing mixer is 10-300rpm; S3: After the aerogel is evenly dispersed, slowly add glass beads into the batching bucket and continue to stir and disperse for 25-35 minutes at 300-500rpm; S4: Add curing agent into the mixing barrel and continue stirring for 1-2 minutes before use.

10. A method for using the multifunctional heat-insulating oily paint according to any one of claims 1 to 8, characterized in that: The steps include: S1: Apply the multifunctional thermal insulation oily paint on the substrate surface; S2: placing the substrate coated with the multifunctional heat-insulating oily paint in step S1 into an oven at 50-110° C. and baking for 5-15 minutes; S3: Repeat the operations of step S1 and step S2 on the surface of the substrate after baking in step S2, apply the multifunctional thermal insulation oily paint on the surface of the substrate several times until the coating thickness reaches 3.5-4mm, and then grind and polish the surface of the substrate until the coating thickness reaches 2.8-3.2mm.

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