Fluorocarbon paint for thermal insulation and decoration integrated plate, fluorine-containing resin for fluorocarbon paint and preparation method of fluorine-containing resin

Abstract

The invention relates to the technical field of heat preservation and decoration integrated plates, in particular to fluorocarbon paint for a heat preservation and decoration integrated plate, fluorine-containing resin for the fluorocarbon paint and a preparation method of the fluorine-containing resin. The preparation method of the fluorine-containing resin comprises the following steps: taking a specific solvent as a medium and azobis (isobutylamidine hydrochloride) as an initiator for polyvinyl fluoride and functional acrylic monomer raw materials in a polymerization kettle under specific reaction conditions, controlling the reaction pressure to be 1.96 MPa, controlling the polymerization temperature to be 50-60 DEG C, continuously replenishing monomers to maintain the polymerization pressure, and reacting for 15-20 hours to obtain the fluorine-containing resin. The fluorine-containing resin is obtained; according to the invention, 1, reactive hydrogen with similar structures such as' ROO-OH 'provided by the functional acrylic monomer and similar structures such as R'-NCO provided by the isocyanate resin are subjected to a rapid cross-linking reaction, so that the final product is super-durable, can be rapidly dried and can rapidly adapt to flow production; 2, by utilizing the physical properties of wear resistance, cohesion, tensile strength and the like endowed by urea bonds, hydrogen bonds, urethane bonds and other chemical bonds in R '-COOR-NH-R and other similar structures provided by the polyaspartic acid ester resin, the final product has the capacities of wear resistance, weather resistance, heavy object resistance, chemical resistance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation decorative integrated panels, in particular to a fluorocarbon paint for thermal insulation decorative integrated panels, a fluorine-containing resin for the fluorocarbon paint and a preparation method thereof. Background Art

[0002] Fluorine-containing two-component coatings have developed rapidly with the development of fluorine-containing resin synthetic chemistry and the widespread application of fluorine-containing resin materials. With the sustained and rapid development of my country's national economy and infrastructure, the requirements for long-term use of national key and large-scale projects are becoming increasingly higher, requiring coatings to have excellent weather resistance, good acid, alkali and salt corrosion resistance and wear resistance, as well as good decorative and construction properties.

[0003] With the advancement of prefabricated buildings, the application of thermal insulation and decorative integrated panels has become increasingly widespread, and the requirements for the protection and decorative effects of thermal insulation and decorative integrated panels have become increasingly high, especially in some operating supermarkets, office buildings, hotels, automobile factories, electronics factories, textile factories, residential buildings, etc.; and fluorine-containing polymer resin materials are a new material developed through innovation. The existing products have relatively poor weather resistance and stain resistance. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a fluorocarbon paint for a thermal insulation decorative integrated panel, a fluorine-containing resin for the fluorocarbon paint and a preparation method thereof.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A fluorine-containing resin for fluorocarbon paint, wherein the preparation method of the fluorine-containing resin comprises the following steps: First, add the mixed solvent PMA / BAC into the kettle, add a part of azobisisobutylamidine hydrochloride as the initiator, add vinyl fluoride and functional acrylic monomers into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to add the remaining azobisisobutylamidine hydrochloride, vinyl fluoride, and functional acrylic monomers into the kettle at 60~80℃ at a fixed speed to participate in the chain extension reaction to obtain a polymerized fluorine-containing resin.

[0006] Furthermore, the addition amount of the azobisisobutylamidine hydrochloride is 1-5%, the addition amount of the vinyl fluoride monomer is 10-20%, the addition amount of the functional acrylic monomer is 40-60%, and the reflux aid is 1-10%.

[0007] Furthermore, azobisisobutylamidine hydrochloride and a mixture of vinyl fluoride and functional acrylic acid monomers are added dropwise at a ratio of 1-5%:100.

[0008] Furthermore, the specific solvent is a mixed solvent of 30-40 wt % of propylene glycol methyl ether acetate (PMA) and 60-7 wt % of n-butyl acetate (BAC).

[0009] A fluorocarbon paint for a thermal insulation decorative integrated panel, the fluorocarbon paint comprising a component A and a component B, wherein the mass fraction of the component A is as follows: 500-600 parts of any of the above fluorine-containing resins, 50-100 parts of polyaspartic acid resin, Gemini wetting agent 1-1.2 parts, 4 to 4.5 parts of dispersant, 4 to 4.5 parts of the first defoamer, 5-10 parts of anti-settling agent, 150-180 parts of titanium dioxide, Precipitate 150-250 parts of barium sulfate, Color paste 0.5~30 parts, Adhesion promoter 4-4.5 parts, 4 to 4.5 parts of leveling agent, Second defoamer 1 to 3; The composition of the B component includes, by mass: 1000 parts of HDI trimer.

[0010] Furthermore, the mass ratio of component A to component B is 10:1.

[0011] Furthermore, the dispersant is a controlled radical polymerization super dispersant.

[0012] Furthermore, the first defoaming agent is polysiloxane 811; and the anti-settling agent is a polyamide wax anti-settling agent.

[0013] Furthermore, the color paste is a solvent-free color paste, and the adhesion promoter is a sulfonamide-based adhesion promoter; The leveling agent is a polyacrylate leveling agent 1123; the second defoaming agent is a polyacrylate defoaming agent, and the reflux aid is ethylene glycol monobutyl ether.

[0014] A method for preparing a fluorocarbon paint for a thermal insulation decorative integrated panel, the preparation method comprising the following steps: S1 Polymerization of fluorine-containing resin: firstly put the mixed solvent PMA / BAC into the kettle, put a part of azobisisobutylamidine hydrochloride as the initiator, put vinyl fluoride and functional acrylic monomer into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to drop the remaining azobisisobutylamidine hydrochloride and vinyl fluoride and functional acrylic monomer into the kettle at 60-80°C at a fixed speed to participate in the chain extension reaction, and obtain a fluorine-containing resin; S2 Use synthetic fluorine-containing resin to make paint: When the high-speed disperser is turned on, add fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer in sequence, disperse at high speed at 40-60°C for 30-35 minutes, grind into a sand mill to a fineness of less than 20μm, adjust the viscosity, and test the performance; Wherein, in step S1, azobisisobutyramidine hydrochloride and a mixture of vinyl fluoride and functional acrylic monomers are added dropwise at a ratio of 1-5%:100.

[0015] The beneficial effects of the technical solution of the present invention are: 1. By utilizing the active hydrogen of similar structures such as 'ROO-OH' provided by functional acrylic monomers and the rapid cross-linking reaction of similar structures such as R″-N〓C〓O provided by isocyanate resins, the final product can be ultra-durable, fast drying, and can be quickly adapted to flow production; 2. Utilize the physical properties such as wear resistance, cohesion, and tensile strength imparted by urea bonds, hydrogen bonds, and urethane bonds in similar structures such as R′-COOR-NH-R provided by polyaspartic acid resin, so that the final product can obtain the ability of wear resistance, weather resistance, resistance to heavy objects, and resistance to chemicals. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with specific implementation methods and description.

[0017] Example 1 The present invention discloses a polymerized fluorine-containing resin used for a paint for a thermal insulation decorative integrated board, which is composed of a component A and a component B; The composition of component A by mass includes: Polymerized fluorinated resin 500 Polyaspartic acid resin 50 Wetting agent 1 Dispersant 4 First defoamer 4 Anti-settling agent 5 Titanium dioxide 100 Precipitated barium sulfate 150 Color paste 0.5 Adhesion promoter 4 Leveling agent 4 Second defoamer 1; The B component comprises, by mass, 100 parts of HDI trimer; The polymerized fluorine-containing resin includes the following components by mass percentage: 5% azobisisobutylamidine hydrochloride, 10% reflux aid, 15% vinyl fluoride monomer, and 70% functional acrylic monomer. The mass ratio of component A to component B is 10:1; The wetting agent is a Gemini surface wetting agent. It should be noted that the Gemini surfactant in the present application is a surfactant monomer of the same type, which is connected by a linking group near the hydrophilic head group through a chemical bond. For example, diglycidyl ether prepared by the reaction of epichlorohydrin and diphenol is used as a linking group, and then reacted with bromoacetic acid, chlorosulfonic acid, propane sultone, and phosphoric acid to obtain sulfate ester salt, sulfonate, carboxylate, and phosphate type Gemini surfactants respectively; The dispersant is a controlled free radical polymerization super dispersant, and the free radical polymerization of controlled anionic active polymerization can be produced by peroxide, 1,1-diphenylhexyl lithium, and triphenylmethyl lithium. The first defoamer is polysiloxane 811; the anti-settling agent is a polyamide wax anti-settling agent; the color paste is a Clariant solvent-free color paste; the adhesion promoter is a sulfonamide-based adhesion promoter; the leveling agent is a polyacrylate leveling agent 1123; the second defoamer is a polyacrylate defoamer; and the reflux aid is ethylene glycol monobutyl ether.

[0018] The specific steps are as follows: Step 1, synthesizing polymerized fluorine-containing resin: Step 1, synthesizing polymerized fluorine-containing resin: polyvinyl fluoride and functional acrylic monomer raw materials are reacted in a polymerization kettle under specific reaction conditions with a specific solvent as a medium, azobisisobutyramidine hydrochloride is used as an initiator, the reaction pressure is controlled to be 1.96MPa, the polymerization temperature is controlled to be 50-60°C, and the monomer is continuously added to maintain the polymerization pressure, and the reaction is carried out for 15-20 hours to obtain a polymerized fluorine-containing resin; Step 2: While turning on the high-speed disperser, add polymerized fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer in sequence, disperse at high speed at 40°C for 30 minutes, grind into a sand mill to a fineness of less than 20μm, adjust the viscosity, and test the performance.

[0019] Example 2 The fluorine-containing resin of the present invention is used as a protective decorative paint for a thermal insulation decorative integrated board, and is characterized in that it is composed of component A and component B; The composition of component A by mass includes: Polymerized fluorinated resin 540 Polyaspartic acid resin 75 Wetting agent 1.1 Dispersant 4.1 First Defoamer 4.2 Anti-settling agent 6 Titanium dioxide 120 Precipitated barium sulfate 180 Color paste 8 Adhesion promoter 4.1 Leveling agent 4.2 Second defoamer 1.5; The B component comprises, by mass, 100 parts of HDI trimer; The polymerized fluorine-containing resin includes the following components by mass percentage: 1-5% azobisisobutylamidine hydrochloride, 1-10% ethylene glycol monobutyl ether as a reflux aid, 10-20% vinyl fluoride monomer, and 40-60% functional acrylic monomer; the mass ratio of component A to component B is 10:1; The wetting agent is a Gemini surface wetting agent. It should be noted that the Gemini surfactant in the present application is a surfactant monomer of the same type, which is connected by a linking group near the hydrophilic head group through a chemical bond. For example, diglycidyl ether prepared by the reaction of epichlorohydrin and diphenol is used as a linking group, and then reacted with bromoacetic acid, chlorosulfonic acid, propane sultone, and phosphoric acid to obtain sulfate ester salt, sulfonate, carboxylate, and phosphate type Gemini surfactants respectively; The dispersant is a controlled free radical polymerization super dispersant, and the free radical polymerization of controlled anionic active polymerization can be produced by peroxide, 1,1-diphenylhexyl lithium, and triphenylmethyl lithium. The first defoamer is polysiloxane 811; the anti-settling agent is a polyamide wax anti-settling agent; the color paste is a Clariant solvent-free color paste; the adhesion promoter is a sulfonamide-based adhesion promoter; the leveling agent is a polyacrylate leveling agent 1123; the second defoamer is a polyacrylate defoamer; and the reflux aid is ethylene glycol monobutyl ether.

[0020] A method for preparing a protective decorative paint for a thermal insulation decorative integrated board using a polymerized fluorine-containing resin, the specific steps are as follows: Step 1: first put the mixed solvent PMA / BAC into the kettle, put a part of azobisisobutylamidine hydrochloride as the initiator, put vinyl fluoride and functional acrylic monomer into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to drop azobisisobutylamidine hydrochloride, vinyl fluoride and functional acrylic monomer into the kettle at 60-80°C at a fixed speed to participate in the chain extension reaction, so as to obtain a fluorine-containing resin.

[0021] First, the mixed solvent PMA / BAC is put into the kettle, stirring is started, and a reflux aid is added. Vinyl fluoride and functional acrylic monomer are respectively added into the kettle at a fixed speed using two dropping funnels at 60°C to participate in the chain extension reaction step by step, and a polymerized fluorine-containing resin is obtained with a content of 1-5% of azobisisobutylamidine hydrochloride, 1-10% of reflux aid ethylene glycol monobutyl ether, 10-20% of vinyl fluoride monomer, and 40-60% of functional acrylic monomer; Step 2: While turning on the high-speed disperser, add polymerized fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer in sequence, disperse at high speed at 45°C for 30 minutes, grind into a sand mill to a fineness of less than 30μm, adjust the viscosity, and test the performance.

[0022] Example 3 The polymerized fluorine-containing resin of the present invention is used as a protective decorative paint for a thermal insulation decorative integrated board, and is composed of a component A and a component B; The composition of component A by mass includes: Polymerized fluorinated resin 570 Polyaspartic acid resin 75 Wetting agent 1.2 Dispersant 4.3 First defoamer 4.4 Anti-settling agent 8 Titanium dioxide 135 Precipitated barium sulfate 220 Color paste 20 Adhesion promoter 4.3 Leveling agent 4.4 Second defoamer 2.4; The B component comprises, by mass, 100 parts of HDI trimer; The wetting agent is a Gemini surface wetting agent. It should be noted that the Gemini surfactant in the present application is a surfactant monomer of the same type, which is connected by a linking group near the hydrophilic head group through a chemical bond. For example, diglycidyl ether prepared by the reaction of epichlorohydrin and diphenol is used as a linking group, and then reacted with bromoacetic acid, chlorosulfonic acid, propane sultone, and phosphoric acid to obtain sulfate ester salt, sulfonate, carboxylate, and phosphate type Gemini surfactants respectively; The dispersant is a controlled free radical polymerization super dispersant, and the free radical polymerization of controlled anionic active polymerization can be produced by peroxide, 1,1-diphenylhexyl lithium, and triphenylmethyl lithium. The first defoamer is polysiloxane 811; the anti-settling agent is a polyamide wax anti-settling agent; the color paste is a Clariant solvent-free color paste; the adhesion promoter is a sulfonamide-based adhesion promoter; the leveling agent is a polyacrylate leveling agent 1123; the second defoamer is a polyacrylate defoamer; and the reflux aid is ethylene glycol monobutyl ether.

[0023] Step 1, preparation of polymerized fluorine-containing resin: first put the mixed solvent PMA / BAC into the kettle, put a part of azobisisobutylamidine hydrochloride as the initiator, put vinyl fluoride and functional acrylic monomer into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to add azobisisobutylamidine hydrochloride, vinyl fluoride and functional acrylic monomer into the kettle at 60-80°C at a fixed speed to participate in the chain extension reaction to obtain a fluorine-containing resin.

[0024] First, put the mixed solvent into the kettle, start stirring, add the reflux aid, and use two dropping funnels to add vinyl fluoride and functional acrylic monomer into the kettle at a fixed speed at 60°C to participate in the chain extension reaction step by step, and obtain a polymerized fluorine-containing resin with a content of 1-5% azobisisobutylamidine hydrochloride, 1-10% reflux aid, 10-20% vinyl fluoride monomer, and 40-60% functional acrylic monomer. The mass ratio of component A to component B is 10:1; Step 2: While turning on the high-speed disperser, add polymerized fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer in sequence, disperse at high speed at 50°C for 33 minutes, grind into a sand mill to a fineness of less than 20μm, adjust the viscosity, and test the performance.

[0025] Example 4 The polymerized fluorine-containing resin of the present invention is used as a protective decorative paint for a thermal insulation decorative integrated board, and is composed of a component A and a component B; The composition of component A by mass includes: Polymerized fluorinated resin 600 Polyaspartic acid resin 100 Wetting agent 1.2 Dispersant 4.5 First Defoamer 4.5 Anti-settling agent 10 Titanium dioxide 150 Precipitated barium sulfate 250 Color paste 30 Adhesion Promoter 4.5 Leveling agent 4.5 Second defoamer 3; The composition of the B component includes: 100 parts of HDI trimer by mass.

[0026] The wetting agent is a Gemini surface wetting agent. It should be noted that the Gemini surfactant in the present application is a surfactant monomer of the same type, which is connected by a linking group near the hydrophilic head group through a chemical bond. For example, diglycidyl ether prepared by the reaction of epichlorohydrin and diphenol is used as a linking group, and then reacted with bromoacetic acid, chlorosulfonic acid, propane sultone, and phosphoric acid to obtain sulfate ester salt, sulfonate, carboxylate, and phosphate type Gemini surfactants respectively; The dispersant is a controlled free radical polymerization super dispersant, and the free radical polymerization of controlled anionic active polymerization can be produced by peroxide, 1,1-diphenylhexyl lithium, and triphenylmethyl lithium. The first defoamer is polysiloxane 811; the anti-settling agent is a polyamide wax anti-settling agent; the color paste is a Clariant solvent-free color paste; the adhesion promoter is a sulfonamide-based adhesion promoter; the leveling agent is a polyacrylate leveling agent 1123; the second defoamer is a polyacrylate defoamer; and the reflux aid is ethylene glycol monobutyl ether.

[0027] The first defoamer is polysiloxane 811; the anti-settling agent is polyamide wax anti-settling agent; the color paste is Clariant solvent-free color paste; the adhesion promoter is sulfonamide adhesion promoter; the leveling agent is polyacrylate leveling agent 1123; the second defoamer is polyacrylate defoamer; and the reflux aid is ethylene glycol monobutyl ether.

[0028] A method for preparing a polymeric fluorine-containing protective decorative paint for a thermal insulation decorative integrated panel, the specific steps are as follows: Step 1: first put the mixed solvent PMA / BAC into the kettle, put a part of azobisisobutylamidine hydrochloride as the initiator, put vinyl fluoride and functional acrylic monomer into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to drop azobisisobutylamidine hydrochloride, vinyl fluoride and functional acrylic monomer into the kettle at 60-80°C at a fixed speed to participate in the chain extension reaction, so as to obtain a fluorine-containing resin.

[0029] First, the mixed solvent PMA / BAC is put into the kettle, stirring is started, and a reflux aid is added. At 60°C, vinyl fluoride and functional acrylic monomer are respectively added into the kettle at a fixed speed using two dropping funnels to participate in the chain extension reaction step by step, and a polymerized fluorine-containing resin is obtained with a content of 1-5% azobisisobutylamidine hydrochloride, 1-10% reflux aid, 10-20% vinyl fluoride monomer, and 40-60% functional acrylic monomer; Step 2: While the high-speed disperser is turned on, polymerized fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer are added in sequence, dispersed at high speed at 60°C for 35 minutes, ground into a sand mill to a fineness of less than 30 μm, adjust the viscosity, and test the performance; Table 1 is the performance test of Examples 1-4 As can be seen from Table 1, the paint for protecting and decorating an integrated thermal insulation decorative panel of the present invention has the advantages of continuous rolling operation, rapid drying, rapid compounding, and good physical and chemical properties.

[0030] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent claim scheme. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fluorine-containing resin for fluorocarbon paint, characterized in that: The preparation method of the fluorine-containing resin comprises the following steps: First, add the mixed solvent PMA / BAC into the kettle, add a part of azobisisobutylamidine hydrochloride as the initiator, add vinyl fluoride and functional acrylic monomers into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to add the remaining azobisisobutylamidine hydrochloride, vinyl fluoride, and functional acrylic monomers into the kettle at 60~80℃ at a fixed speed to participate in the chain extension reaction to obtain a polymerized fluorine-containing resin.

2. A fluorine-containing resin for fluorocarbon paint according to claim 1, characterized in that: The addition amount of the azobisisobutyramidine hydrochloride is 1-5%, the addition amount of the vinyl fluoride monomer is 10-20%, the addition amount of the functional acrylic acid monomer is 40-60%, and the reflux aid is 1-10%.

3. The fluorine-containing resin for fluorocarbon paint according to claim 1, characterized in that: Azobisisobutyramidine hydrochloride and a mixture of vinyl fluoride and functional acrylic monomers are added dropwise at a ratio of 1-5%:

100.

4. The polymerized fluorine-containing resin for fluorocarbon paint according to claim 1, characterized in that: The specific solvent is a mixed solvent of 30-40 wt % of propylene glycol methyl ether acetate (PMA) and 60-70 wt % of n-butyl acetate (BAC).

5. A fluorocarbon paint for thermal insulation decorative integrated panels, characterized in that: The fluorocarbon paint comprises component A and component B, and the mass fraction of component A is as follows: 500-600 parts of the fluorine-containing resin according to any one of claims 1 to 4, 50-100 parts of polyaspartic acid resin, Gemini wetting agent 1-1.2 parts, 4 to 4.5 parts of dispersant, 4 to 4.5 parts of the first defoamer, 5-10 parts of anti-settling agent, 150-180 parts of titanium dioxide, 150-250 parts of precipitated barium sulfate, Color paste 0.5~30 parts, Adhesion promoter 4-4.5 parts, 4 to 4.5 parts of leveling agent, Second defoamer 1 to 3; The composition of the B component includes, by mass: 1000 parts of HDI trimer.

6. The fluorocarbon paint for thermal insulation decorative integrated panels according to claim 5, characterized in that: The mass ratio of component A to component B is 10:

1.

7. The fluorocarbon paint for thermal insulation decorative integrated panels according to claim 5, characterized in that: The dispersant is a controlled free radical polymerization hyperdispersant.

8. The fluorocarbon paint for thermal insulation decorative integrated panels according to claim 5, characterized in that: The first defoaming agent is polysiloxane 811; the anti-settling agent is a polyamide wax anti-settling agent.

9. The fluorocarbon paint for thermal insulation decorative integrated panels according to claim 5, characterized in that: The color paste is a solvent-free color paste, and the adhesion promoter is a sulfonamide-based adhesion promoter; The leveling agent is a polyacrylate leveling agent 1123; the second defoaming agent is a polyacrylate defoaming agent, and the reflux aid is ethylene glycol monobutyl ether.

10. A method for preparing a fluorocarbon paint for a thermal insulation decorative integrated panel according to any one of claims 5 to 9, characterized in that: The preparation method comprises the following steps: S1 Polymerization of fluorine-containing resin: firstly put the mixed solvent PMA / BAC into the kettle, put a part of azobisisobutylamidine hydrochloride as the initiator, put vinyl fluoride and functional acrylic monomer into the kettle, start stirring to form a seed polymer, add a reflux aid, and use two dropping funnels to drop the remaining azobisisobutylamidine hydrochloride and vinyl fluoride and functional acrylic monomer into the kettle at 60-80°C at a fixed speed to participate in the chain extension reaction, and obtain a polymerized fluorine-containing resin; Wherein, in step S1, azobisisobutyramidine hydrochloride and a mixture of vinyl fluoride and functional acrylic acid monomers are added dropwise at a ratio of 1-5%:100; S2 Use synthetic fluorine-containing resin to make paint: While turning on the high-speed disperser, add fluorine-containing resin, wetting agent, dispersant, first defoamer, anti-settling agent, titanium dioxide, precipitated barium sulfate, color paste, adhesion promoter, leveling agent and second defoamer in sequence, disperse at high speed at 40-60°C for 30-35 minutes, grind into a sand mill to a fineness of less than 20μm, adjust the viscosity and test the performance.

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