Water-based non-toxic film spraying material and preparation method thereof

Abstract

The invention relates to the field of waterproof materials, in particular to a water-based non-toxic film spraying material and a preparation method thereof, and the film spraying material comprises purified water, benzenediol, methacrylic acid, acrylic acid, butyl acrylate, magnesium oxide, n-hydroxyethyl acrylamide, n-hydroxymethyl acrylamide, diethylenetriamine, calcined kaolin and heavy calcium carbonate. The water-based nontoxic film spraying material is prepared by taking acrylic acid and methacrylic acid as base materials and adding various fillers and auxiliaries such as magnesium oxide, N-hydroxyethyl acrylamide, butyl acrylate, hydroquinone and diethylenetriamine, and is respectively mixed with triethanolamine and ammonium persulfate for grouting when in use; therefore, the coating is quick in film formation, flame-retardant, fireproof, acid-base-resistant and anti-aging, and can be self-healed when damaged, so that the service life is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the field of waterproof materials, and in particular to a water-based non-toxic spray film material and a preparation method thereof. Background Art

[0002] Waterproof materials are mainly used in building materials. During construction, in order to prevent erosion by moisture, steam and other harmful liquids in the air, the buildings are generally waterproofed. Especially for buildings in humid and enclosed environments such as tunnels and basements, the requirements for waterproof materials are very strict.

[0003] There are two main types of existing waterproof materials: one is waterproof board, which is supported by polymer materials and laid on the outer layer of buildings, mainly used for tunnel waterproofing; the other is waterproof coating, which is mainly polyester waterproof material, epoxy waterproof coating and chlorinated rubber waterproof material, which is sprayed on the wall surface when used. However, the polymer waterproof board is expensive and is not integrally formed, so leakage is prone to occur in the gap between the two waterproof boards; although waterproof coating is low in cost, it has a limited lifespan, is easy to age, and needs to be sprayed repeatedly, and most waterproof coatings are prone to emit harmful gases, such as polyester waterproof materials that release volatile organic compounds (VOCs) during the curing process.

[0004] Therefore, it is of great practical significance to develop a water-based, non-toxic, anti-aging and long-life spray film material. Summary of the invention

[0005] In view of this, the present invention provides a water-based non-toxic spray film material and a preparation method thereof, aiming to solve the problems that traditional waterproof coatings have limited lifespan, are easy to age, require repeated spraying and are prone to emit harmful gases.

[0006] In one aspect, the present invention provides a water-based non-toxic spray film material comprising the following components:

[0007] 306-506 parts of purified water, 0.5-0.7 parts of hydroquinone, 20-40 parts of methacrylic acid, 188-388 parts of acrylic acid, 6-8 parts of butyl acrylate, 84-104 parts of magnesium oxide, 2-6 parts of n-hydroxyethyl acrylamide, 18-38 parts of n-hydroxymethyl acrylamide, 12-32 parts of diethylenetriamine, 150-350 parts of calcined kaolin and 225-425 parts of heavy calcium carbonate.

[0008] Furthermore, the acrylate mixture also includes the following components: 3-6 parts of a dispersant and 2-4 parts of a defoaming agent.

[0009] Furthermore, the dispersant is an ammonium salt dispersant; and the defoaming agent is a mineral oil defoaming agent.

[0010] On the other hand, the present application also provides a method for preparing the water-based non-toxic spray film material as claimed in claim 1, comprising:

[0011] S1, adding water and hydroquinone into a reaction kettle and stirring evenly, then adding methacrylic acid, acrylic acid, and butyl acrylate in sequence and stirring evenly, and then adding magnesium oxide and stirring evenly to obtain a first mixture;

[0012] S2, adding n-hydroxyethyl acrylamide, n-hydroxymethyl acrylamide, and diethylenetriamine to the first mixture in sequence, stirring evenly, to obtain a second mixture;

[0013] S3, adding a dispersant, a defoamer, calcined kaolin and heavy calcium carbonate to the second mixture, stirring evenly, and then discharging to obtain the water-based non-toxic spray film material;

[0014] Furthermore, when in use, the spray film material is divided into two components A and B, triethanolamine is added to the component A and stirred evenly; ammonium persulfate is added to the component B and stirred evenly, and then the components A and B are respectively added to the two grouting tubes of the double-tube grouting machine for grouting operation.

[0015] Further, the component A comprises: 20-60 parts of the spray film material and 0.4-0.6 parts of triethanolamine;

[0016] The component B comprises: 20-60 parts of the spray film material and 0.6-1 part of ammonium persulfate.

[0017] Furthermore, when adding magnesium oxide, the cooling water of the reactor is turned on to ensure that the temperature in the reactor is always below 60°C.

[0018] Furthermore, when discharging the material in step S3, a filter screen is added to the discharging port before discharging the material.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses acrylic acid and methacrylic acid as base materials, and further adds magnesium oxide, N-hydroxyethyl acrylamide, butyl acrylate, hydroquinone and diethylenetriamine as fillers and additives, and does not contain harmful substances and does not volatilize harmful gases. In addition, N-hydroxyethyl acrylamide can improve the water resistance of the spray film material through a self-crosslinking reaction, and N-hydroxymethyl acrylamide can enhance its waterproof performance and adhesion through copolymerization with acrylic acid monomers. At the same time, hydroquinone has an antioxidant effect on acrylic acid, which can effectively protect the spray film material from the influence of environmental oxidation, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 A flow chart of a method for preparing a water-based non-toxic spray film material provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Waterproof materials are mainly used in building materials. During construction, in order to prevent erosion by moisture, steam and other harmful liquids in the air, the buildings are generally waterproofed. Especially for buildings in humid and enclosed environments such as tunnels and basements, the requirements for waterproof materials are very strict.

[0024] There are two main types of existing waterproof materials. One is waterproof board, which is supported by polymer materials and laid on the outer layer of buildings. It is mainly used for tunnel waterproofing. The other is waterproof coating, which is mainly polyester waterproof material, epoxy waterproof coating and chlorinated rubber waterproof material, which is sprayed on the wall surface when used. However, the polymer waterproof board is expensive, and it is not integrally formed, so leakage is easy to occur in the gap between the two waterproof boards. Although the waterproof coating is low in cost, it has a limited lifespan, is easy to age, and needs to be sprayed repeatedly. Moreover, most waterproof coatings are prone to emit harmful gases. For example, polyester waterproof materials release volatile organic compounds (VOCs) during the curing process. Therefore, it is of great practical significance to develop a water-based, non-toxic, anti-aging and long-life spray film material.

[0025] The embodiment of the present invention provides a water-based non-toxic spray film material, comprising the following components:

[0026] 306-506 parts of purified water, 0.5-0.7 parts of hydroquinone, 20-40 parts of methacrylic acid, 188-388 parts of acrylic acid, 6-8 parts of butyl acrylate, 84-104 parts of magnesium oxide, 2-6 parts of n-hydroxyethyl acrylamide, 18-38 parts of n-hydroxymethyl acrylamide, 12-32 parts of diethylenetriamine, 150-350 parts of calcined kaolin and 225-425 parts of heavy calcium carbonate.

[0027] Preferably, the ingredients include 306-406 parts of purified water, 0.5-0.6 parts of hydroquinone, 20-30 parts of methacrylic acid, 188-288 parts of acrylic acid, 6-7 parts of butyl acrylate, 84-94 parts of magnesium oxide, 2-4 parts of n-hydroxyethyl acrylamide, 18-28 parts of n-hydroxymethyl acrylamide, 12-22 parts of diethylenetriamine, 150-250 parts of calcined kaolin and 225-225 parts of heavy calcium carbonate.

[0028] More preferably, the ingredients include 306 parts of purified water, 0.5 parts of hydroquinone, 20 parts of methacrylic acid, 188 parts of acrylic acid, 6 parts of butyl acrylate, 84 parts of magnesium oxide, 2 parts of n-hydroxyethyl acrylamide, 18 parts of n-hydroxymethyl acrylamide, 12 parts of diethylenetriamine, 150 parts of calcined kaolin and 225 parts of heavy calcium carbonate.

[0029] It is understandable that calcined kaolin can significantly improve hiding power, reduce light transmittance, make spray film materials more uniform and smooth, and can effectively replace titanium dioxide, thereby reducing the cost of spray film materials; heavy calcium carbonate can make spray film materials less likely to settle, improve their dispersibility, and improve construction performance and storage stability. At the same time, heavy calcium carbonate has high whiteness, which can significantly improve the gloss and overall appearance of spray film materials.

[0030] Specifically, the N-hydroxyethyl group in N-hydroxyethyl acrylamide can undergo self-crosslinking reaction, thereby improving the water resistance and scrub resistance; N-hydroxymethyl acrylamide can copolymerize with acrylic acid monomers to increase the molecular weight of the spray film material, thereby enhancing its waterproof performance, and N-hydroxymethyl acrylamide also has the effect of enhancing adhesion; hydroquinone can promote the polymerization reaction of acrylic acid. In addition, hydroquinone also has an antioxidant effect on acrylic acid, which can effectively protect it from the influence of environmental oxidation, thereby extending its service life.

[0031] It is understandable that N-hydroxyethyl acrylamide, N-hydroxymethyl acrylamide and hydroquinone can jointly increase the waterproof performance and life of the spray film material through different pathways, so that the waterproof performance and service life of the present invention far exceed those of existing waterproof materials.

[0032] It can be understood that diethylenetriamine has very good adhesion, which can help the spray film material to better adhere to the surface of the substrate. In addition, diethylenetriamine also has good chemical activity. Adding diethylenetriamine to the spray film material can improve the material's waterproof, corrosion resistance and chemical resistance. These characteristics make the present invention more adaptable to various complex working environments and reduce the shedding or peeling of the spray film material caused by chemical reactions.

[0033] Specifically, acrylic acid is an industrial grade, colorless liquid with a content greater than 99%; methacrylic acid is an industrial grade, colorless liquid with a content greater than 99%; magnesium oxide is an industrial grade, white powder with a content greater than 98% and a fineness of 1000 mesh or more; calcined kaolin is a coating grade, white powder with a fineness of 1250 mesh; heavy calcium carbonate is a coating grade, white powder with a fineness of 800 mesh; N-hydroxyethyl acrylamide is an industrial grade with a content greater than 98%; N-hydroxymethyl acrylamide is an industrial grade with a content greater than 42%; butyl acrylate is an industrial grade with a content greater than 98%; hydroquinone is an industrial grade with a content greater than 98%; diethylenetriamine is an industrial grade with a content greater than 98%;

[0034] In some embodiments of the present invention, the aqueous non-toxic spraying material also includes: 3-6 parts of dispersant and 2-4 parts of defoaming agent; preferably, 3-4 parts of dispersant and 2-2 parts of defoaming agent; further preferably, 3 parts of dispersant and 2 parts of defoaming agent.

[0035] Specifically, the dispersant is an ammonium salt dispersant, and the defoamer is a mineral oil defoamer. The dispersant is preferably tetramethylammonium chloride or hexadecyltrimethylammonium chloride, and more preferably hexadecyltrimethylammonium chloride; the defoamer is preferably a mineral oil silicone defoamer.

[0036] It can be understood that dispersants can improve the adhesion between spray materials and substrates, enhance the durability of spray materials, and effectively prevent particles from agglomerating again within a certain period of time, thereby maintaining the fluidity and application performance of spray materials. Dispersants can also adjust and improve the fluidity and application performance of spray materials, ensure the smoothness of spray materials during spraying and brushing, improve the uniformity of coating, and evenly dispersed spray materials present more consistent colors, reduce color differences, and improve the final visual effect. The use of defoamers helps to form a smooth and uniform coating, improve the appearance and feel of spray materials, and prevent bubbles and depressions. Defoamers can also reduce the formation of bubbles, thereby improving the adhesion of spray materials and their performance on the surface of the substrate.

[0037] See also Figure 1 The present invention provides a method for preparing a water-based non-toxic spray film material, comprising:

[0038] S1, adding water and hydroquinone into a reaction kettle and stirring evenly, then adding methacrylic acid, acrylic acid, and butyl acrylate in sequence and stirring evenly, and then adding magnesium oxide and stirring evenly to obtain a first mixture;

[0039] S2, adding n-hydroxyethyl acrylamide, n-hydroxymethyl acrylamide, and diethylenetriamine to the first mixture in sequence, stirring evenly, to obtain a second mixture;

[0040] S3, adding a dispersant, a defoamer, calcined kaolin and heavy calcium carbonate to the second mixture, stirring evenly, and then discharging to obtain the water-based non-toxic spray film material;

[0041] Specifically, when adding methacrylic acid and acrylic acid, you should wear chemical-resistant gloves, usually polyvinyl chloride (PVC), nitrile rubber or silicone gloves, to prevent direct skin contact; wear protective glasses or masks to protect your eyes from chemical splashes; and wear chemical-resistant work clothes, such as overalls, long-sleeved shirts and trousers, to prevent direct skin contact and safety accidents.

[0042] Specifically, when adding hydroquinone, it should be added while stirring to ensure that the hydroquinone can be mixed evenly; when adding magnesium oxide, it should be added slowly to prevent safety accidents caused by violent reactions.

[0043] In some embodiments provided by the present invention, when in use, the spraying material is evenly divided into two components A and B, triethanolamine is added to component A and stirred evenly; ammonium persulfate is added to component B and stirred evenly, and then component A and component B are respectively added to the two grouting tubes of the double-tube grouting machine for grouting operation.

[0044] Specifically, component A includes: 20-60 parts of spray film material and 0.4-0.6 parts of triethanolamine; component B includes: 20-60 parts of spray film material and 0.6-1 parts of ammonium persulfate. Preferably, component A includes: 20-40 parts of spray film material and 0.4-0.5 parts of triethanolamine; component B includes: 20-40 parts of spray film material and 0.6-0.8 parts of ammonium persulfate. More preferably, component A includes: 20 parts of spray film material and 0.4 parts of triethanolamine; component B includes: 20 parts of spray film material and 0.6 parts of ammonium persulfate.

[0045] Specifically, triethanolamine is a colorless liquid with an analytical grade content of 99%, and ammonium persulfate is a white crystalline powder.

[0046] Specifically, the reactor used is a temperature-adjustable reactor. When magnesium oxide is added, the cooling water of the reactor is turned on to ensure that the temperature in the reactor is always below 60°C.

[0047] It is understandable that the reaction rate of magnesium oxide with components such as acrylic acid will accelerate under high temperature conditions, resulting in an overly violent reaction. Controlling the temperature can ensure a stable and controllable reaction rate and avoid the formation of unstable intermediates or by-products. Moreover, at higher temperatures, magnesium oxide will absorb moisture and react with moisture to form magnesium hydroxide (Mg(OH)2), which will affect the final performance and stability of the spray film material. Ensuring that the temperature is below 60°C can reduce the occurrence of such undesirable reactions. At the same time, high temperature may affect the polymerization properties of acrylic resin, resulting in degradation or cross-linking reactions of the molecular chains, thereby affecting the flexibility, strength and weather resistance of the final product. Low temperature conditions help maintain the physical properties of the material.

[0048] Specifically, adding a layer of filter screen at the discharge port before discharging can effectively filter out impurities and improve the quality of the spray film material.

[0049] Example 1

[0050] (1) Wear chemical-resistant gloves, hoods and work clothes;

[0051] (2) 306 parts of purified water were added to a reaction kettle, and 0.5 parts of hydroquinone was added while stirring, followed by 20 parts of methacrylic acid, 188 parts of acrylic acid, and 6 parts of butyl acrylate, and stirred for 5 minutes;

[0052] (3) Turn on the cooling water in the reactor to ensure that the temperature in the reactor is not higher than 60° C., then add 84 parts of magnesium oxide and continue stirring for 10 minutes;

[0053] (4) Add 2 parts of n-hydroxyethyl acrylamide, 18 parts of n-hydroxymethyl acrylamide, and 12 parts of diethylenetriamine in sequence, and stir for 15 minutes after addition;

[0054] (5) Then, 3 parts of hexadecyltrimethylammonium chloride, 2 parts of mineral oil silicone defoamer, 150 parts of calcined kaolin, and 225 parts of heavy calcium carbonate were added in sequence. The addition was completed, and the mixture was stirred for 20 minutes before discharging. When discharging the mixture, a filter was added at the discharge port to filter out impurities, thereby obtaining a water-based non-toxic spray film material.

[0055] (6) When using: take 20 parts of the prepared spraying material and 0.4 parts of triethanolamine, stir evenly to obtain component A; take 20 parts of the prepared spraying material and 0.6 parts of ammonium persulfate, stir evenly to obtain component B, then add component A and component B into the two grouting tubes of the double-tube grouting machine respectively, and then perform the grouting operation.

[0056] Example 2

[0057] (1) Wear chemical-resistant gloves, hoods and work clothes;

[0058] (2) adding 406 parts of purified water to a reaction kettle, adding 0.6 parts of hydroquinone while stirring, and then adding 30 parts of methacrylic acid, 288 parts of acrylic acid, and 7 parts of butyl acrylate in sequence, and stirring for 5 minutes;

[0059] (3) Turn on the cooling water in the reactor to ensure that the temperature in the reactor is not higher than 60° C., then add 94 parts of magnesium oxide and continue stirring for 10 minutes;

[0060] (4) Add 4 parts of n-hydroxyethyl acrylamide, 28 parts of n-hydroxymethyl acrylamide, and 22 parts of diethylenetriamine in sequence, and stir for 15 minutes after addition;

[0061] (5) Then, 4 parts of hexadecyltrimethylammonium chloride, 3 parts of mineral oil silicone defoamer, 250 parts of calcined kaolin, and 325 parts of heavy calcium carbonate were added in sequence. The addition was completed, and the mixture was stirred for 20 minutes before discharging. When discharging the mixture, a filter was added at the discharge port to filter out impurities, thereby obtaining a water-based non-toxic spray film material.

[0062] (6) When using: take 40 parts of the prepared spraying material and 0.5 parts of triethanolamine, stir evenly to obtain component A; take 40 parts of the prepared spraying material and 0.6 parts of ammonium persulfate, stir evenly to obtain component B, then add component A and component B into the two grouting tubes of the double-tube grouting machine respectively, and then perform the grouting operation.

[0063] Example 3

[0064] (1) Wear chemical-resistant gloves, hoods and work clothes;

[0065] (2) 506 parts of purified water were added to a reaction kettle, and 0.7 parts of hydroquinone was added while stirring, followed by 40 parts of methacrylic acid, 388 parts of acrylic acid, and 8 parts of butyl acrylate, and stirred for 5 minutes;

[0066] (3) Turn on the cooling water in the reactor to ensure that the temperature in the reactor is not higher than 60° C., then add 104 parts of magnesium oxide and continue stirring for 10 minutes;

[0067] (4) Add 6 parts of n-hydroxyethyl acrylamide, 38 parts of n-hydroxymethyl acrylamide, and 32 parts of diethylenetriamine in sequence, and stir for 15 minutes after addition;

[0068] (5) Then, 6 parts of hexadecyltrimethylammonium chloride, 4 parts of mineral oil silicone defoamer, 350 parts of calcined kaolin, and 425 parts of heavy calcium carbonate were added in sequence. The addition was completed, and the mixture was stirred for 20 minutes before discharging. When discharging, a filter screen was added at the discharge port to filter out impurities, thereby obtaining a water-based non-toxic spray film material.

[0069] (6) When using: take 60 parts of the prepared spray film material and 0.6 parts of triethanolamine, stir evenly to obtain component A; take 60 parts of the prepared spray film material and 0.1 parts of ammonium persulfate, stir evenly to obtain component B, then add component A and component B into the two grouting tubes of the double-tube grouting machine respectively, and then perform the grouting operation.

[0070] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0071] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0072] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0073] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A water-based non-toxic spray film material, characterized in that: The invention comprises the following components: 306-506 parts of purified water, 0.5-0.7 parts of hydroquinone, 20-40 parts of methacrylic acid, 188-388 parts of acrylic acid, 6-8 parts of butyl acrylate, 84-104 parts of magnesium oxide, 2-6 parts of n-hydroxyethyl acrylamide, 18-38 parts of n-hydroxymethyl acrylamide, 12-32 parts of diethylenetriamine, 150-350 parts of calcined kaolin and 225-425 parts of heavy calcium carbonate.

2. The water-based non-toxic spray film material according to claim 1, characterized in that: The invention also comprises the following components: 3-6 parts of dispersant and 2-4 parts of defoamer.

3. The water-based non-toxic spray film material according to claim 1, characterized in that: The dispersant is an ammonium salt dispersant; the defoamer is a mineral oil defoamer.

4. A method for preparing a water-based non-toxic spray film material as claimed in claim 1, characterized in that: include: S1, adding water and hydroquinone into a reaction kettle and stirring evenly, then adding methacrylic acid, acrylic acid, and butyl acrylate in sequence and stirring evenly, and then adding magnesium oxide and stirring evenly to obtain a first mixture; S2, adding n-hydroxyethyl acrylamide, n-hydroxymethyl acrylamide, and diethylenetriamine to the first mixture in sequence, stirring evenly, to obtain a second mixture; S3, adding dispersant, defoamer, calcined kaolin and heavy calcium carbonate to the second mixture, stirring evenly and discharging to obtain the water-based non-toxic spray film material.

5. The method for preparing the film spraying material according to claim 4, characterized in that: When in use, the spray film material is evenly divided into two components A and B, triethanolamine is added to the component A and stirred evenly; ammonium persulfate is added to the component B and stirred evenly, and then the components A and B are respectively added to the two grouting tubes of the double-tube grouting machine for grouting operation.

6. The method for preparing the spray film material according to claim 5, characterized in that: The component A comprises: 20-60 parts of the spray film material and 0.4-0.6 parts of triethanolamine; The component B comprises: 20-60 parts of the spray film material and 0.6-1 part of ammonium persulfate.

7. The method for preparing the film spraying material according to claim 4, characterized in that: When adding magnesium oxide, turn on the cooling water of the reactor to ensure that the temperature in the reactor is always below 60°C.

8. The method for preparing the spray film material according to claim 4, characterized in that: When discharging in step S3, a filter screen is added to the discharging port before discharging.

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