Mechanized roller coating method for roller coating type fluorocarbon metal finish paint for thermal insulation integrated plate

Abstract

The invention relates to a mechanical roller coating method of a roller coating type fluorocarbon metal finish paint for a thermal insulation integrated board, which is characterized in that the fluorocarbon metal paint is stable in state and full in paint film by selecting proper fluorocarbon resin, adding proper auxiliaries such as a thickening agent and the like, optimizing the proportion and improving the arrangement and leveling property of aluminum powder. A paint film obtained after coating has the advantages of being high in decoration performance, low in VOC emission, low in manufacturing cost, high in production efficiency, good in leveling property, fast to dry, good in aluminum powder orientation, good in adhesive force, high in hardness and the like. The coating method disclosed by the invention has the advantages of simple process, high efficiency, low cost and no pollution, and the surface effect can reach the spraying opening effect of the imitation aluminum plate.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and specifically to a mechanized roller coating method for roller-coated fluorocarbon metallic topcoat for integrated insulation panels. Background Technology

[0002] In recent years, a large part of the painting process for integrated insulation panels (such as imitation aluminum panels) has adopted the method of creating an open effect on fiber cement boards, resulting in a variety of colors and a rich and colorful appearance.

[0003] To create an open-pore paint effect on fiber cement board, the traditional process typically involves first applying a layer of PU sealing and penetrating primer, followed by sanding; then applying one to two coats of clear putty primer and allowing it to dry completely before sanding again; finally, spraying on a fluorocarbon metallic topcoat. This process is time-consuming (preliminary calculations indicate at least 58 hours), energy-intensive, and results in significant organic solvent evaporation, causing substantial pollution to workers and the environment, ultimately leading to low overall efficiency and effectiveness. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a mechanized roller coating method for roller-coated fluorocarbon metallic topcoats used in integrated insulation panels. By selecting suitable fluorocarbon resins, adding appropriate additives such as thickeners, and optimizing the formulation, the arrangement and leveling properties of aluminum powder are improved, resulting in a stable and full-bodied fluorocarbon metallic paint. The paint film obtained after coating by this invention features strong decorative properties, low VOC emissions, low production cost, high production efficiency, good leveling properties, fast drying, good aluminum powder orientation, good adhesion, and high hardness. The coating method of this invention is simple, efficient, low-cost, pollution-free, and achieves an open-pore finish resembling aluminum sheet spraying.

[0005] To solve the above problems, the present invention is achieved through the following technical solution:

[0006] This invention provides a mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels, which includes the following steps;

[0007] S1. Fiber cement board pretreatment:

[0008] Use mechanized equipment to grind and polish the surface of the fiber cement board to remove burrs;

[0009] S2. Roller coating of UV transparent primer:

[0010] The UV transparent primer mentioned is a fast-drying UV transparent penetrating primer, applied using a fully automatic mechanical PU roller, with one application each clockwise and counterclockwise, and the coating amount controlled at 40-50 g / m². 2 ;

[0011] S3. Infrared drying and ultraviolet curing:

[0012] In the drying area of ​​the UV curing machine's mechanical conveyor belt, infrared drying is performed at 60℃ for 1-2 minutes, followed by UV drying with an energy of 500-800 mJ / cm². 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds.

[0013] S4. Sand and dust removal:

[0014] In the dust removal area, dust is automatically removed;

[0015] S5. Roller-coated UV transparent putty primer:

[0016] The UV transparent putty primer has a viscosity of 600–800 mPa·s and is applied once clockwise with a PU roller, with the coating amount controlled at 50–60 g / m². 2 UV energy of 500–800 mJ / cm 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds.

[0017] S6. Polishing:

[0018] Use mechanized equipment to sand and remove the roller marks from the UV transparent putty primer, making the paint film surface smooth and flat.

[0019] S7. Sand and dust removal:

[0020] In the dust removal area, dust is automatically removed;

[0021] S8. Repeat steps S5 to S7 at least once;

[0022] S9. Roller-coated fluorocarbon metallic topcoat:

[0023] Apply the mixed roller-coating fluorocarbon metallic topcoat once counterclockwise using a PU roller, controlling the coating amount to be 25-30 g / m². 2 ;

[0024] S10. Infrared Leveling:

[0025] Infrared leveling at 50℃ for 1-2 minutes;

[0026] S11. Repeat steps S9 to S10 at least once;

[0027] S12. Steam heating curing:

[0028] Steam energy is converted into a heat source at a temperature of 60±10℃ for curing, with a curing time of 180~210min, thus completing the coating.

[0029] The roller-coated fluorocarbon metallic topcoat comprises the following raw material components in parts by weight:

[0030] The ingredients are: 45-65 parts fluorocarbon resin, 0.5-3 parts thickener, 0.5-1.5 parts dispersant, 0.5-1.5 parts cellulose ether, 5-10 parts aluminum powder, 12-30 parts solvent, and 0.1-0.3 parts antifouling agent.

[0031] The fluorocarbon resin is one or a combination of trifluorofluorocarbon resin and tetrafluorofluorocarbon resin;

[0032] The selected fluorocarbon resin is synthesized by copolymerizing trifluorochloroethylene monomer, vinyl ester monomer or tetrafluoroethylene monomer with functional monomers. Monomers with some functional groups are introduced into the main chain of the fluororesin, reducing the crystallinity of the original fluororesin. This allows the copolymer resin to dissolve in organic solvents and achieve room temperature curing. As a result, the fluorocarbon coating exhibits excellent weather resistance, heat resistance, chemical resistance, and extraordinary surface properties such as water repellency, oil repellency, stain resistance, low friction, and electrical insulation.

[0033] The aluminum powder is a non-floating, silver-spherical aluminum pigment coated with acrylic resin, with a particle size range of 10–16 μm.

[0034] The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels of the present invention is further optimized as follows:

[0035] The aluminum powder is prepared using the following methods:

[0036] Hydroxyacrylate resin is synthesized via conventional solution polymerization using monomers including methyl methacrylate (MMA), butyl acrylate (BA), and acrylic acid (AA). The synthesized hydroxyacrylate resin is then mixed with aluminum powder pigment at a mass ratio of 1.1–2:1 and reacted at above 50°C for 2 hours to form an adsorption coating layer, resulting in silver-spherical, non-floating aluminum pigment encapsulated in the acrylic resin. The prepared aluminum powder exhibits higher luster and improved acid resistance and coating adhesion compared to currently available unencapsulated aluminum powder.

[0037] The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels of the present invention is further optimized as follows:

[0038] The fluorocarbon resin mentioned is one of the following: fluorocarbon resin from Changxing Chemical, HLR-2 fluorocarbon resin from Dongfu Chemical, and fluorocarbon resin from Wuxi Wanbo Coatings Chemical.

[0039] The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels of the present invention is further optimized as follows:

[0040] The fiber cement board is one of low-density fiber cement board, medium-density fiber cement board, or high-density calcium silicate board. Preferably:

[0041] The fiber cement board has a strength of 1.35 g / m³. 3 High density fiber cement board, 1.45g / m³ 3 High density fiber cement board or 1.45g / m³ 3 Calcium silicate board.

[0042] Fiber cement boards require high-density boards to achieve good results. Therefore, the inventors conducted experiments and explorations on commonly used materials in the market and found that the following materials are more suitable: low-density fiber cement boards, medium-density fiber cement boards, and high-density calcium silicate boards.

[0043] A further optimization of the mechanized roller coating method for roller-coated fluorocarbon metallic topcoat of integrated insulation panels of the present invention is as follows:

[0044] The hardness of the PU rollers in steps S2, S5 and S9 is 35-40HS.

[0045] A further optimization of the mechanized roller coating method for roller-coated fluorocarbon metallic topcoat of integrated insulation panels of the present invention is as follows:

[0046] It includes one or more of the following features:

[0047] The thickener is one of acrylic thickeners, alkali-swellable thickeners (ASE or HASE), polyurethane thickeners, and polyethylene wax;

[0048] The dispersant is a polymeric dispersant that can form a stable protective layer on the pigment surface by adsorption, preventing pigment aggregation. Preferably, it is DISPERBYK-110, EFKA-4050, etc.

[0049] The cellulose ether is one of hydroxyethyl cellulose (HEC) and carboxymethyl cellulose (CMC);

[0050] The antifouling agent is a siloxane-based antifouling agent, preferably TEGO Protect 5000. TEGO Protect 5000 is a siloxane-based antifouling agent that provides excellent hydrophobicity and oleophobicity, and can significantly reduce the adsorption of the coating surface and prevent dirt accumulation.

[0051] The solvent is one or a combination of several of xylene, butyl acetate, cyclohexanone, propylene glycol methyl ether acetate, and ethyl acetate.

[0052] A further optimization of the mechanized roller coating method for roller-coated fluorocarbon metallic topcoat of integrated insulation panels of the present invention is as follows:

[0053] The polyethylene wax mentioned is a DISPARLON series wax paste.

[0054] The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels of the present invention is further optimized as follows:

[0055] The roller-coated fluorocarbon metallic topcoat includes the following preparation steps:

[0056] Dispersant, cellulose ether and solvent are added to fluorocarbon resin and stirred for 5-10 minutes until uniform. Then thickener is added and dispersed at high speed for 20 minutes until the viscosity is qualified (thixotropic). Aluminum powder and antifouling additive are then added and stirred until uniform to obtain the roller-coated fluorocarbon metallic topcoat.

[0057] Roller-coated fluorocarbon metallic topcoats need to possess excellent adhesion, colorfastness, and quick-drying properties on fiber cement boards. The hardness of the paint film should not be too low, ideally between 2H and 3H, to compensate for insufficient substrate hardness. The paint viscosity should be controlled between 60 and 75 KU, and the hardness of the roller coating machine roller should be 35 to 40 HS to achieve high leveling and wettability of the substrate's conduits. Depending on the actual color requirements, no more than 20% oil-based colorant can be added. After curing, excellent weather resistance and decorative effect are achieved without the need for a topcoat. Therefore, after designing and experimenting with roller-coated fluorocarbon metallic topcoats, the inventors selected several commercially available fluorocarbon resins, such as those from Changxing, Dongfu, and Wanbo. These resins have excellent film-forming properties and high hardness; their lower viscosity helps reduce paint viscosity, ensuring satisfactory application performance. Fluorocarbon resins possess excellent film toughness and fullness, as well as good wettability and weather resistance.

[0058] As is well known, metallic paint application is mostly done by spraying, while roller coating can easily lead to uneven paint color due to the different arrangement of aluminum powder. Therefore, after designing and experimenting with roller-coated fluorocarbon metallic topcoats, the inventors, on the one hand, purposefully selected the types of auxiliary raw materials (such as additives), ultimately choosing thickeners, dispersants, cellulose ethers, antifouling agents, and solvents. These additives can help the aluminum powder achieve better orientation, making it evenly arranged and consistent in color. On the other hand, while ensuring the existing specific performance, more direct and specific optimization limits were also given to these selected auxiliary raw materials based on test results. For example, polyethylene wax is preferably DISPARLON series wax paste, and the optimized solution can improve the corresponding technical effect.

[0059] The technical solution of this invention, through the ingenious combination of selected raw materials, enables the prepared roller-coated fluorocarbon metallic topcoat to have good wetting and leveling properties, with the application viscosity controlled at 60-75 KU. In this way, the roller-coated fluorocarbon metallic topcoat of this invention can easily penetrate into the conduit, achieving better leveling and wetting properties. Thus, the roller-coated fluorocarbon metallic topcoat of this invention can achieve the effect of PU spraying during roller coating without roller marks.

[0060] The fluorocarbon metallic topcoat coating process of the present invention has the following advantages compared with traditional processes:

[0061] The adhesion of fluorocarbon metallic paint applied by roller to fiber cement boards is equal to or even better than that of paint applied using traditional methods. Furthermore, the process is simple, quick, and significantly improves efficiency while saving energy.

[0062] The fluorocarbon metallic topcoat of this invention is applied using a PU roller coating, achieving results comparable to spraying. It boasts high leveling and fullness, resulting in a superior mirror finish. Furthermore, the fluorocarbon metallic topcoat of this invention effectively wets the conduit, solving the problem of ordinary fluorocarbon metallic paint roller coatings failing to wet and enter the conduit, thus enhancing the overall effect and quality.

[0063] This invention uses a UV transparent penetrating primer as the primer for fiber cement boards because it has excellent adhesion, pigment encapsulation, quick-drying properties, and good oil-sealing effect. This solves the oil-sealing problem for substrates with high oil content, improves adhesion, and prevents the paint film from peeling off later.

[0064] The coating process of this invention is entirely mechanized, consuming very little time, significantly reducing labor input, greatly improving production efficiency, and lowering costs, thus bringing greater economic benefits. The roller-coating fluorocarbon metallic paint process of this invention automatically applies the paint to the fiber cement board surface using automated machinery. The roller coating speed can reach 12 meters / minute, with a daily output of 8500 square meters and a defect rate controlled at 0.5%. In contrast, the traditional spray coating process has a speed of only 2.5 meters / minute, a daily output of only 2100 square meters, and a defect rate of 1.5%. The new process technology is four times more efficient than the traditional process and reduces the defect rate by two times. The roller coating process provides stable color that lasts as new, truly achieving high efficiency and environmental protection.

[0065] This invention utilizes environmentally friendly UV paint, combining the environmental friendliness, fast drying, and excellent adhesion of fluorocarbon metallic paint. This results in a paint film with good hardness, excellent anti-sagging properties, and superior adhesion, thus enhancing the overall quality of the coating. Simultaneously, it significantly improves production efficiency, facilitating large-scale promotion. Furthermore, its organic solvent emissions are minimal, aligning with the national green and environmentally friendly development concept and contributing to energy conservation and emission reduction. Detailed Implementation

[0066] To make the application, technical solution, and advantages of this invention clearer, the invention is described in detail with reference to specific embodiments. It should be understood that the embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Any simple improvements to the preparation method of this invention based on the inventive concept fall within the scope of protection of this invention.

[0067] Example 1

[0068] A mechanized roller coating method for roller-coated fluorocarbon metallic topcoat for integrated insulation panels, comprising the following steps;

[0069] S1. Pretreatment of fiber cement board (low-density fiber cement board):

[0070] Use mechanized equipment to grind and polish the surface of the fiber cement board to remove burrs;

[0071] S2. Roller coating of UV transparent primer:

[0072] The UV transparent primer mentioned is a fast-drying UV transparent penetrating primer, applied using a fully automatic mechanical PU roller, with one application each clockwise and counterclockwise, and the coating amount controlled at 40-50 g / m². 2 ;

[0073] The hardness of the PU roller is 35-40 HS;

[0074] S3. Infrared drying and ultraviolet curing:

[0075] In the drying area of ​​the UV curing machine's mechanical conveyor belt, infrared drying is performed at 60℃ for 1-2 minutes, followed by UV drying with an energy of 500-800 mJ / cm². 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds.

[0076] S4. Sand and dust removal:

[0077] In the dust removal area, dust is automatically removed;

[0078] S5. Roller-coated UV transparent putty primer:

[0079] The UV transparent putty primer has a viscosity of 600–800 mPa·s and is applied once clockwise with a PU roller, with the coating amount controlled at 50–60 g / m². 2 UV energy of 500–800 mJ / cm 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds.

[0080] The hardness of the PU roller is 35-40 HS;

[0081] S6. Polishing:

[0082] Use mechanized equipment to sand and remove the roller marks from the UV transparent putty primer, making the paint film surface smooth and flat.

[0083] S7. Sand and dust removal:

[0084] In the dust removal area, dust is automatically removed;

[0085] S8. Roller-coated UV transparent putty primer:

[0086] The UV transparent putty primer has a viscosity of 600–800 mPa·s and is applied once clockwise with a PU roller, with the coating amount controlled at 50–60 g / m². 2 UV energy of 500–800 mJ / cm 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds.

[0087] The hardness of the PU roller is 35-40 HS;

[0088] S9. Polishing:

[0089] Use mechanized equipment to sand and remove the roller marks from the UV transparent putty primer, making the paint film surface smooth and flat.

[0090] S10. Sand and dust removal:

[0091] In the dust removal area, dust is automatically removed;

[0092] S11. Roller-coated fluorocarbon metallic topcoat:

[0093] Apply the mixed roller-coating fluorocarbon metallic topcoat once counterclockwise using a PU roller, controlling the coating amount to be 25-30 g / m². 2 ;

[0094] The hardness of the PU roller is 35-40 HS;

[0095] S12. Infrared Leveling:

[0096] Infrared leveling at 50℃ for 1-2 minutes;

[0097] S13. Roller-coated fluorocarbon metallic topcoat:

[0098] Apply the mixed roller-coating fluorocarbon metallic topcoat once counterclockwise using a PU roller, controlling the coating amount to be 25-30 g / m². 2 ;

[0099] The hardness of the PU roller is 35-40 HS;

[0100] S14. Infrared Leveling:

[0101] Infrared leveling at 50℃ for 1-2 minutes;

[0102] S15. Steam heating curing:

[0103] Steam energy is converted into a heat source at a temperature of 60±10℃ for curing, with a curing time of 180~210min, thus completing the coating.

[0104] The roller-coated fluorocarbon metallic topcoat comprises the following raw material components in parts by weight:

[0105] 45 parts of fluorocarbon resin (Dongfu HLR-2), 0.5 parts of thickener, 0.5 parts of dispersant, 0.5 parts of cellulose ether, 5 parts of aluminum powder, 12 parts of solvent, and 0.1 parts of antifouling agent;

[0106] The aluminum powder is a non-floating, silver-coated, spherical aluminum pigment with a particle size ranging from 10 to 16 μm. The acrylic resin-coated, silver-coated, spherical, non-floating aluminum pigment is prepared according to the preparation method described in the preceding specification.

[0107] Example 2

[0108] A mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels. Example 2 uses the same coating method as Example 1, the main difference being that Example 2 involves roller coating the fluorocarbon metallic topcoat onto medium-density fiber cement board; and the composition of the roller-coated fluorocarbon metallic topcoat in Example 2 is basically the same as in Example 1, the main difference being that the amount of fluorocarbon resin is adjusted to 50 parts, the amount of aluminum powder is adjusted to 6 parts, and everything else remains unchanged.

[0109] Example 3

[0110] A mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels. Example 3 uses the same coating method as Example 1, the main difference being that Example 3 involves roller coating of the fluorocarbon metallic topcoat onto a high-density calcium silicate board; and the composition of the roller-coated fluorocarbon metallic topcoat in Example 3 is basically the same as in Example 1, the main difference being that the amount of fluorocarbon resin is adjusted to 55 parts, the amount of aluminum powder is adjusted to 8 parts, and other parameters remain unchanged.

[0111] Comparative Example 1

[0112] Comparative Example 1 uses the roller-coated fluorocarbon metallic topcoat from Example 1, the main difference being that Comparative Example 1 uses a conventional mechanized roller coating method.

[0113] Comparative Example 2

[0114] Comparative Example 2 uses the roller coating process of Example 1, the main difference being that: Comparative Example 2 uses conventional fluorocarbon metallic topcoat.

[0115] Comparative Example 3

[0116] The main difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses a conventional roller coating process and a conventional fluorocarbon metallic topcoat.

[0117] The performance comparison of the products obtained by using the coating method of the present invention in Examples 1-3 and Comparative Examples 1-3 is shown in Table 1 below:

[0118] Table 1

[0119]

[0120] According to the JB / T 287-2013 standard "External Insulation Materials for Exterior Walls with Thermal Insulation Decorative Panels", the tests conducted in Examples 1 to 3 all met the corresponding test requirements, such as excellent aging resistance (2500h), stain resistance (≤10%), adhesion (≤1 grade), acid resistance (168h), alkali resistance (168h), water resistance (168h), and salt spray resistance (500h).

[0121] The water resistance, salt spray resistance, stain resistance, and adhesion of Comparative Example 1 all failed to meet the standards.

[0122] Comparative Example 2 failed to meet the standards for acid resistance, alkali resistance, aging resistance, water resistance, salt spray resistance, stain resistance, and adhesion.

[0123] Comparative Example 3 failed to meet the standards for acid resistance, alkali resistance, aging resistance, water resistance, salt spray resistance, stain resistance, and adhesion.

[0124] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any changes, modifications, and evolutions made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content shall be considered equivalent embodiments of the present invention. Furthermore, any changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the protection scope of the present invention.

[0125] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] Experimental methods not specified in this invention are generally performed under conventional conditions or as recommended by the manufacturer.

[0127] Unless otherwise stated, the various optimized technical solutions in this invention can be combined with each other.

[0128] Unless otherwise stated, percentages and parts are weight percentages and weight parts.

[0129] Experimental methods not specified in the instructions and examples are generally performed under standard conditions or as recommended by the manufacturer.

[0130] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as are familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be used in the methods of this invention.

Claims

1. A mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels, characterized in that: It includes the following steps; S1. Fiber cement board pretreatment: Use mechanized equipment to grind and polish the surface of the fiber cement board to remove burrs; S2. Roller coating of UV transparent primer: The UV transparent primer mentioned is a fast-drying UV transparent penetrating primer, applied using a fully automatic mechanical PU roller, with one application each clockwise and counterclockwise, and the coating amount controlled at 40-50 g / m². 2 ; S3. Infrared drying and ultraviolet curing: In the drying area of ​​the UV curing machine's mechanical conveyor belt, infrared drying is performed at 60℃ for 1-2 minutes, followed by UV drying with an energy of 500-800 mJ / cm². 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds. S4. Sand and dust removal: In the dust removal area, dust is automatically removed; S5. Roller-coated UV transparent putty primer: The UV transparent putty primer has a viscosity of 600–800 mPa·s and is applied once clockwise with a PU roller, with the coating amount controlled at 50–60 g / m². 2 UV energy of 500–800 mJ / cm 2 The material is cured by ultraviolet light, with an irradiation time of 4–5 seconds. S6. Polishing: Use mechanized equipment to sand and remove the roller marks from the UV transparent putty primer, making the paint film surface smooth and flat. S7. Sand and dust removal: In the dust removal area, dust is automatically removed; S8. Repeat steps S5 to S7 at least once; S9. Roller-coated fluorocarbon metallic topcoat: Apply the mixed roller-coating fluorocarbon metallic topcoat once counterclockwise using a PU roller, controlling the coating amount to be 25-30 g / m². 2 ; S10. Infrared Leveling: Infrared leveling at 50℃ for 1-2 minutes; S11. Repeat steps S9 to S10 at least once; S12. Steam heating curing: Steam energy is converted into a heat source at a temperature of 60±10℃ for curing, with a curing time of 180~210min, thus completing the coating. The roller-coated fluorocarbon metallic topcoat comprises the following raw material components in parts by weight: The ingredients are: 45-65 parts fluorocarbon resin, 0.5-3 parts thickener, 0.5-1.5 parts dispersant, 0.5-1.5 parts cellulose ether, 5-10 parts aluminum powder, 12-30 parts solvent, and 0.1-0.3 parts antifouling agent. The fluorocarbon resin is one or a combination of trifluorofluorocarbon resin and tetrafluorofluorocarbon resin; The aluminum powder is a non-floating, silver-spherical aluminum pigment coated with acrylic resin, with a particle size range of 10–16 μm.

2. The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: The aluminum powder is prepared using the following methods: Hydroxyacrylate resin is synthesized by conventional solution polymerization using monomers including methyl methacrylate, butyl acrylate, and acrylic acid. The synthesized hydroxyacrylate resin is then mixed with aluminum powder pigment at a mass ratio of 1.1 to 2:1 and reacted at a temperature above 50°C for 2 hours to form an adsorption coating layer, thus obtaining the silver circular non-floating aluminum pigment coated with the acrylic resin.

3. The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: The fluorocarbon resin mentioned is one of the following: fluorocarbon resin from Changxing Chemical, HLR-2 fluorocarbon resin from Dongfu Chemical, and fluorocarbon resin from Wuxi Wanbo Coatings Chemical.

4. The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: The fiber cement board is one of low-density fiber cement board, medium-density fiber cement board, or high-density calcium silicate board.

5. The mechanized roller coating method for roller-coated fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: The hardness of the PU rollers in steps S2, S5, and S9 is 35-40 HS.

6. The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: It includes one or more of the following features: The thickener is one of acrylic thickeners, alkali-swellable thickeners, polyurethane thickeners, and polyethylene wax; The dispersant is a polymeric dispersant; The cellulose ether is one of hydroxyethyl cellulose and carboxymethyl cellulose; The antifouling additive is a siloxane-based antifouling additive; The solvent is one or a combination of several of xylene, butyl acetate, cyclohexanone, propylene glycol methyl ether acetate, and ethyl acetate.

7. The mechanized roller coating method for roller-coated fluorocarbon metallic topcoat for integrated insulation panels according to claim 6, characterized in that: The polyethylene wax mentioned is a DISPARLON series wax paste.

8. The mechanized roller coating method for roller-coating fluorocarbon metallic topcoat for integrated insulation panels according to claim 1, characterized in that: The roller-coated fluorocarbon metallic topcoat includes the following preparation steps: Dispersant, cellulose ether and solvent are added to fluorocarbon resin and stirred for 5-10 minutes until uniform. Then thickener is added and dispersed at high speed for 20 minutes until the viscosity is qualified (thixotropic). Aluminum powder and antifouling additive are then added and stirred until uniform to obtain the roller-coated fluorocarbon metallic topcoat.

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