A scale-inhibiting coating and scale-inhibiting coating

Abstract

The application discloses a kind of scale inhibition coating and scale inhibition coating, scale inhibition coating is by dry weight weight fraction, including the following raw materials: FOF scale inhibitor 40-55 parts, scale inhibition dispersant 0.5-5 parts, film-forming component 45-225 parts, wherein, scale inhibition dispersant has dispersing property and scale inhibition performance, film-forming component is water-based film-forming resin containing curing agent or water-based film-forming resin without curing agent.The application will be used with the scale inhibition dispersant with scale inhibition performance and dispersing property and FOF scale inhibitor, solve the problem of difficult dispersion of FOF scale inhibitor, scale inhibition dispersant itself is soluble, when dispersing FOF scale inhibitor, be adsorbed to its surface, plus there is resin coating, also has slow-release capacity, so no need to use slow-release carrier, equivalent to once ball milling, obtain the dispersing effect and slow-release capacity, two kinds of scale inhibitors compound will not mutually inhibit, can realize synergistic scale inhibition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scale inhibition coating, in particular to a scale inhibition coating and a scale inhibition coating. BACKGROUND

[0002] Various underwater components of household are in contact with tap water for a long time, which is easy to produce scale, the main component of which is calcium carbonate and magnesium hydroxide, and may also contain calcium sulfate, etc., and its harm is also well known. To solve this problem, coating a scale inhibition coating on the surface of the component is a simple and feasible method, and such coating can be divided into physical scale inhibition and chemical scale inhibition according to scale inhibition technology. Physical scale inhibition is generally a hydrophobic coating, which has low surface energy and can slow down the adhesion and deposition of scale. However, a single physical scale inhibition coating can only slow down the adhesion and deposition of scale, and the amount of deposited scale will also be large under long-term use conditions. Chemical scale inhibition is to add scale inhibitor to the coating, and the scale inhibitor cannot be completely covered by other components, so it can be released from the water / coating interface to form a water-soluble complex with calcium and magnesium ions in water, thereby preventing scale formation.

[0003] FOF scale inhibitor is a product developed by the French National Science Research Institute, which has the advantages of good scale inhibition effect, green environmental protection and strong stability. It is a slow-release scale inhibitor, which can be directly made into tablets or other macroscopic objects without using a slow-release carrier, and then placed in a certain cavity. When water flows through it, it contacts with water to achieve scale inhibition, and can be used in household water treatment scenes such as water dispensers. However, FOF scale inhibitor is rarely used in coatings, mainly because FOF scale inhibitor is added in the form of powder to the coating with organic resin as the film-forming material, and then the coating is made. There is a obvious problem of agglomeration in appearance, even if the FOF scale inhibitor powder is first dispersed by high-speed shearing, the problem still exists.

[0004] Ethylene diamine tetraacetate, nitrilotriacetate, ethylene diamine tetramethylene phosphonate, diethylene triamine pentaformyl phosphonic acid, 2-phosphonobutane-1, 2, 4-tricarboxylic acid, polyacrylic acid, polymeric sulfonate, polyepoxysuccinate, etc. are commonly used scale inhibitors in industrial water systems such as boiler water, geothermal water, oil field, salt industry, etc. They are usually used in the form of direct feeding, and some researches are added to the coating for use. However, the solubility of the above-mentioned scale inhibitors is relatively high, and if they are added to the coating for use, they will be released quickly due to the relatively high solubility, and usually need to use a slow-release carrier, and the process is relatively complex. SUMMARY

[0005] The present application aims to at least solve one of the above technical problems in the related art to some extent. To this end, the present application provides a scale inhibition coating and a scale inhibition coating.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] The application provides a scale-inhibiting coating, which comprises the following raw materials in parts by weight based on dry weight: 45-55 parts of FOF scale inhibitor, 0.5-5 parts of scale-inhibiting dispersant, and 45-225 parts of film-forming component, wherein the scale-inhibiting dispersant has both dispersing performance and scale-inhibiting performance, and the film-forming component is water-based film-forming resin containing a curing agent or water-based film-forming resin without a curing agent; the scale-inhibiting coating is prepared by the following method: mixing the scale-inhibiting dispersant, the FOF scale inhibitor and water, ball-milling the obtained slurry to obtain scale-inhibiting dispersant slurry, and mixing the scale-inhibiting dispersant slurry and the film-forming component to obtain the scale-inhibiting coating.

[0008] In some embodiments of the application, the scale-inhibiting dispersant is 1-5 parts.

[0009] In some embodiments of the application, the ball-milling is performed using zirconium dioxide balls with a diameter of 0.8-1 mm, and the ball-milling time is 0.75-1.5 h.

[0010] In some embodiments of the application, the raw materials further comprise fluororesin dispersion; the fluororesin dispersion is at least one of polytetrafluoroethylene dispersion or polyperfluoroalkylpropylene dispersion. The fluororesin dispersion is added to the water-based resin as a hydrophobic aid, which can enhance the hydrophobicity and obtain the scale-inhibiting effect.

[0011] In some embodiments of the application, the fluororesin dispersion is used in an amount of 1-40 parts by weight based on dry weight. When the amount of the fluororesin dispersion is small, the FOF scale inhibitor can be added in a larger amount.

[0012] In some embodiments of the application, the FOF scale inhibitor is 45-55 parts, the scale-inhibiting dispersant is 0.5-5 parts, the film-forming component is 100-225 parts, and the fluororesin dispersion is 13-40 parts by weight based on dry weight.

[0013] In some embodiments of the application, the FOF scale inhibitor is 45-55 parts, the scale-inhibiting dispersant is 0.5-5 parts, the film-forming component is 45-100 parts, and the fluororesin dispersion is 1-13 parts by weight based on dry weight.

[0014] In some embodiments of the application, the fluororesin dispersion is added after the scale-inhibiting dispersant slurry is obtained, and the scale-inhibiting dispersant slurry, the fluororesin dispersion and the film-forming component are mixed to obtain the scale-inhibiting coating.

[0015] In some embodiments of the application, the scale-inhibiting dispersant is at least one of polyepoxysuccinic acid salt, disodium ethylenediaminetetraacetate dihydrate, polyacrylic acid, ethylenediaminetetramethylene phosphonate or diethylenetriamine pentamethylene phosphonic acid.

[0016] In some embodiments of the present application, the water-based film-forming resin is selected from one of a water-based epoxy resin, a water-based polyurethane resin, a water-based acrylic resin, or a water-based fluorocarbon resin. A water-resistant type of the above water-based film-forming resin can be selected.

[0017] In some embodiments of the present application, a pH regulator is further included, which is selected from at least one of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA), diethylene triamine penta-methylene phosphonic acid, or polyacrylic acid. Further, the pH regulator is added before ball milling, and the specific process is as follows: the scale inhibiting dispersant, the pH regulator, the FOF scale inhibitor, and water are mixed, and the obtained slurry is ball milled. The pH of the polyepoxysuccinic acid salt is too high, which can easily affect the curing performance of the coating. Therefore, the pH regulator is added to the polyepoxysuccinic acid salt solution to adjust the pH to 7.5-8.5. In fact, PBTCA is rarely used as a pH regulator, but considering that it is also a scale inhibitor and has good calcium carbonate scale inhibition effect, it can also achieve the effect of one agent with two functions. It should be noted that the pH regulator is not essential in the coating of the present application, and is used when the pH of the coating is high. For example, when the scale inhibiting dispersant is selected as disodium ethylenediaminetetraacetate dihydrate or polyacrylic acid, the pH is not high, and the pH regulator can be added or not added.

[0018] In some embodiments of the present application, a defoaming agent is further included. The defoaming agent is a conventional auxiliary agent for eliminating foam in the coating.

[0019] The present application also provides a scale inhibiting coating prepared from the scale inhibiting coating, and the preparation method of the scale inhibiting coating is as follows: the scale inhibiting coating is applied on a substrate, dried and cured, the cured coating is soaked in warm water at 25-40℃, and the scale inhibiting coating is obtained after drying. The polytetrafluoroethylene particles and the polyperfluoroethylene propylene particles are not soluble in water by themselves, and are almost not released during the soaking process, and can maintain the hydrophobicity of the coating for a long time. However, when the addition amount is relatively large (>5%, based on solid), the coating is prone to foaming in hot water, that is, the wet adhesion of the coating is significantly reduced, which is mainly caused by the fluorine-containing surfactant contained in the fluororesin dispersion. The problem can be solved by the post-treatment of soaking in warm water after the coating is cured. The soaking in warm water can release the free fluorine-containing surfactant enriched on the surface of the coating to reduce its influence. At this time, the temperature is low, and water molecules are not easy to invade the coating. After the release, the hydrophobicity of the coating is enhanced, and water molecules are not easy to invade the coating in the subsequent hot water test. If the coating is not soaked in warm water but directly soaked in hot water, the hot water is more likely to invade the coating with the help of the fluorine-containing surfactant, causing foaming.

[0020] In some embodiments of the present application, the soaking time is 12-36h.

[0021] According to a preferred embodiment of the present application, at least the following beneficial effects are achieved:

[0022] 1、The present application uses scale and dispersing agent with scale and dispersing performance and FOF scale inhibitor to solve the problem of dispersing FOF scale inhibitor. The scale and dispersing agent is easy to dissolve, and is adsorbed on the surface of FOF scale inhibitor when dispersing FOF scale inhibitor. In addition, the scale and dispersing agent has the ability of slow release because of the resin coating, so it does not need slow release carrier, which is equivalent to one ball milling, and obtains the dispersing effect and slow release ability, and the process is simple. The two kinds of scale inhibitors do not inhibit each other, and can realize synergistic scale inhibition.

[0023] 2、The scale and dispersing agent and FOF scale inhibitor are a group of compounded scale inhibitors, which surpass the usual sense of compounding. The scale and dispersing agent acts as the dispersing agent of FOF scale inhibitor, and the FOF scale inhibitor acts as the slow release carrier of scale and dispersing agent. The two interact with each other and achieve each other.

[0024] 3、The present application adds fluororesin dispersion liquid as hydrophobic aid to the coating, and matches with the slow-release chemical scale inhibitor to form a physical + chemical composite scale inhibition system, and the scale inhibition effect is durable. The coating prepared by adding fluororesin dispersion liquid is first soaked in warm water to release the surfactant in the coating before being formally put into use, so that the coating can not be directly put into the hot water use environment, and the adhesion of the coating in hot water can be greatly improved.

[0025] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. DETAILED DESCRIPTION

[0026] The concept and technical effects of the present application will be described below in combination with examples, so as to fully understand the purpose, features and effects of the present application. Obviously, the described examples are only part of the examples of the present application, but not all examples. Based on the examples of the present application, other examples obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] Information of raw materials involved in examples and comparative examples:

[0028] Waterborne epoxy resin: HDE3264-WB, solid content 64%, Shanghai Handai Chemical Co., Ltd.;

[0029] Waterborne epoxy curing agent: HDH6377-WB, solid content 50%, Shanghai Handai Chemical Co., Ltd.;

[0030] Polytetrafluoroethylene (PTFE) dispersion liquid: JF-4DCF, solid content 60%, Zhejiang Ju Hua Co., Ltd.;

[0031] FOF scale inhibitor: 100 mesh, Hangzhou Shangshan New Material Co., Ltd.;

[0032] Polyepoxysuccinate (PESA) solution: solid content 40%, HO(C4H2O5)M2 n H, n = 2-10, M is Na + or H + Shandong Taihe Science and Technology Co., Ltd.

[0033] Disodium ethylenediaminetetraacetate dihydrate (EDTA·2Na·2H2O): chemical reagent

[0034] Polyacrylic acid (PAA): molecular weight 3000-5000, solid content 50%, Tianjin Huasheng Chemical Reagent Co., Ltd.

[0035] 2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) solution: solid content 50%, Jinan Zhongbei Fine Chemical Co., Ltd.

[0036] Dispersant: W750, anionic polymer, solid content 50%, Fuke Technology (Suzhou) Co., Ltd.

[0037] Defoamer: BYK-024, Germany BYK Chemical.

[0038] Example 1

[0039] In this example, a scale-inhibiting coating and scale-inhibiting coating are prepared, and the specific process is as follows:

[0040] (1) According to the weight part, take 200 parts of deionized water, add 6.25 parts of polyepoxysuccinate (PESA) solution, add 0.125 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) solution, stir uniformly, then add 50 parts of FOF scale inhibitor powder, then use zirconium dioxide balls with a diameter of 1 mm for ball milling, the ball milling time is 1 h, and a scale inhibitor dispersion slurry is obtained;

[0041] (2) Add 201.9 parts of water-based epoxy resin, 43.75 parts of polytetrafluoroethylene dispersion, 109.1 parts of water-based epoxy curing agent, and 0.2 parts of defoamer to the above scale inhibitor dispersion slurry, stir uniformly, and obtain a scale-inhibiting coating;

[0042] (3) Spray the scale-inhibiting coating on the polished and cleaned 304 stainless steel substrate (10 x 7 cm 2 ), and cure at 80℃ for 1.5 h, the dry weight of the coating on the area after curing is 0.4534 g;

[0043] (4) The above cured coating is taken out and dried after soaking in 35℃ warm water for 24 h to obtain a scale-inhibiting coating.

[0044] Example 2

[0045] A scale inhibition coating and scale inhibition coating layer are prepared in this example, and the specific process is as follows:

[0046] (1) According to the weight part, take 167 parts of deionized water, add 5.21 parts of polyepoxysuccinic acid salt (PESA) solution, add 0.104 parts of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA) solution, stir uniformly, add 41.7 parts of FOF scale inhibitor powder, then use zirconium dioxide ball with diameter of 1 mm for ball milling, ball milling time is 1 h, to obtain scale inhibitor dispersion slurry;

[0047] (2) Add 201.9 parts of water-based epoxy resin, 43.75 parts of polytetrafluoroethylene dispersion liquid, 109.1 parts of water-based epoxy curing agent and 0.2 parts of defoaming agent to the above scale inhibitor dispersion slurry, stir uniformly, to obtain scale inhibition coating;

[0048] (3) Spray the scale inhibition coating on the polished and cleaned 304 stainless steel substrate (10×7 cm 2 ), and cure at 80℃ for 1.5 h, the dry weight of the coating on the area after curing is 0.4412 g;

[0049] (4) The above cured coating is taken out and dried after soaking in 35℃ warm water for 24 h, to obtain scale inhibition coating.

[0050] Example 3

[0051] A scale inhibition coating and scale inhibition coating layer are prepared in this example, and the specific process is as follows:

[0052] (1) According to the weight part, take 203.48 parts of deionized water, add 2.77 parts of disodium ethylenediaminetetraacetate dihydrate, add 0.125 parts of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA) solution, stir uniformly, add 50 parts of FOF scale inhibitor powder, then use zirconium dioxide ball with diameter of 1 mm for ball milling, ball milling time is 1 h, to obtain scale inhibitor dispersion slurry;

[0053] (2) Add 201.9 parts of water-based epoxy resin, 43.75 parts of polytetrafluoroethylene dispersion liquid, 109.1 parts of water-based epoxy curing agent and 0.2 parts of defoaming agent to the above scale inhibitor dispersion slurry, stir uniformly, to obtain scale inhibition coating;

[0054] (3) Spray the scale inhibition coating on the polished and cleaned 304 stainless steel substrate (10×7 cm 2 ), and cure at 80℃ for 1.5 h, the dry weight of the coating on the area after curing is 0.4478 g;

[0055] (4) The above cured coating is taken out and dried after soaking in 35℃ warm water for 24 h, to obtain scale inhibition coating.

[0056] Example 4

[0057] A scale-inhibiting coating and a scale-inhibiting coating layer were prepared in this example, and the specific process was as follows:

[0058] (1) According to the weight parts, 201.25 parts of deionized water were taken, 5 parts of polyacrylic acid (PAA) solution were added, 0.125 parts of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA) solution were added, and stirred uniformly, then 50 parts of FOF scale inhibitor powder were added, and then zirconium dioxide balls with a diameter of 1 mm were used for ball milling, the ball milling time was 1 h, and a scale inhibitor dispersion slurry was obtained;

[0059] (2) 201.9 parts of water-based epoxy resin, 43.75 parts of polytetrafluoroethylene dispersion, 109.1 parts of water-based epoxy curing agent, and 0.2 parts of defoaming agent were added into the above scale inhibitor dispersion slurry, and stirred uniformly to obtain a scale-inhibiting coating;

[0060] (3) The scale-inhibiting coating was sprayed on a polished and cleaned 304 stainless steel substrate (10×7 cm 2 ), and cured at 80°C for 1.5 h, and the dry weight of the coating layer on the area after curing was 0.4584 g;

[0061] (4) The above cured coating layer was taken out and dried after being soaked in warm water at 35°C for 24 h to obtain a scale-inhibiting coating layer.

[0062] Example 5

[0063] A scale-inhibiting coating and a scale-inhibiting coating layer were prepared in this example, and the specific process was as follows:

[0064] (1) According to the weight parts, 205.7 parts of deionized water were taken, 0.55 parts of disodium ethylenediaminetetraacetate dihydrate were added, and stirred uniformly, then 50 parts of FOF scale inhibitor powder were added, and then zirconium dioxide balls with a diameter of 1 mm were used for ball milling, the ball milling time was 1 h, and a scale inhibitor dispersion slurry was obtained;

[0065] (2) 83.25 parts of water-based epoxy resin, 2 parts of polytetrafluoroethylene dispersion, 45 parts of water-based epoxy curing agent, and 0.1 parts of defoaming agent were added into the above scale inhibitor dispersion slurry, and stirred uniformly to obtain a scale-inhibiting coating;

[0066] (3) The scale-inhibiting coating was sprayed on a polished and cleaned 304 stainless steel substrate (10×7 cm 2 ), and cured at 80°C for 1.5 h, and the dry weight of the coating layer on the area after curing was 0.4433 g.

[0067] Comparative Example 1

[0068] A scale-inhibiting coating and scale-inhibiting coating layer were prepared in this comparative example, which differed from Example 1 in that dispersant W750 was used instead of PESA, and the amount of dispersant W750 was controlled to be 5% of the FOF scale inhibitor by solid content, which was the same as the amount of PESA in Example 1. The specific process was as follows:

[0069] (1) 200 parts by weight of deionized water, 5 parts of dispersant W750, 0.125 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) solution were added, stirred uniformly, 50 parts of FOF scale inhibitor powder was added, then zirconium dioxide balls with a diameter of 1 mm were used for ball milling, the ball milling time was 1 h, and a scale inhibitor dispersion slurry was obtained;

[0070] Steps (2)-(4) were the same as those in Example 1.

[0071] Comparative Example 2

[0072] A scale-inhibiting coating and scale-inhibiting coating layer were prepared in this comparative example, which differed from Example 1 in that PBTCA was not added, and the other steps were the same as those in Example 1.

[0073] Comparative Example 3

[0074] A scale-inhibiting coating and scale-inhibiting coating layer were prepared in this comparative example, which differed from Example 1 in that the warm water soaking operation in step (4) of Example 1 was omitted.

[0075] Comparative Example 4

[0076] A scale-inhibiting coating and scale-inhibiting coating layer were prepared in this comparative example, which differed from Example 1 in that 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) was used instead of PESA. The specific process was as follows:

[0077] (1) 201.25 parts by weight of deionized water, 5.125 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) solution were added, stirred uniformly, 50 parts of FOF scale inhibitor powder was added, then zirconium dioxide balls with a diameter of 1 mm were used for ball milling, the ball milling time was 1 h, and a scale inhibitor dispersion slurry was obtained;

[0078] Steps (2)-(4) were the same as those in Example 1.

[0079] Comparative Example 5

[0080] In this comparative example, the 304 stainless steel substrate was polished and cleaned, and no scale-inhibiting coating was sprayed.

[0081] Test Example

[0082] The performance of the examples and comparative examples was tested in this test example, and the test results are shown in Table 1. Among them:

[0083] Contact angle: tested according to JC / T 2168-2013.

[0084] Hard water bath test (test the amount of scale): prepare hard water with a hardness of about 350 mg / L (tap water 1 L + calcium chloride 0.251 g + magnesium sulfate heptahydrate 0.211 g + sodium bicarbonate 0.27 g + sodium chloride 0.08 g, tap water hardness about 100 mg / L, calculated as equivalent calcium carbonate), immerse the sample in 1 L of hard water at 50°C for 60 days (replace the hard water every 2 days), and then remove it and wash off the attached liquid with slow water flow, clean the scale on the back of the steel plate, dry and weigh (recorded as m1), clean the scale on the coating surface, dry and weigh again (recorded as m2). The amount of scale is calculated as (m1-m2) / the area of one side of the sample (70 cm 2 ).

[0085] Table 1 test results

[0086]

[0087] As can be seen from Table 1, the amount of scale of Comparative Example 1 is significantly more than that of Example 1, which is because Comparative Example 1 uses a common dispersant, which can only reduce the agglomeration of FOF scale inhibitor and improve the appearance of the coating, and has little contribution to the scale inhibition effect. The scale inhibition performance of Example 1 can be improved by using a scale inhibition and dispersion scale inhibitor. The coating of Comparative Example 2 has a slight blistering problem, which is because Comparative Example 2 does not add PBTCA, and the alkalinity of the polyepoxysuccinate is too strong, which affects the adhesion of the coating. Comparative Example 3 is not soaked in warm water, and the contact angle before the hard water bath is significantly lower than that of Example 1, indicating that the hydrophobicity of the coating soaked in warm water is enhanced. The coating of Comparative Example 3 has dense micro-bubbles in some areas after the water bath, and the coating of Example 1 does not blister or fall off, indicating that warm water soaking can improve the wet adhesion of the coating. Comparative Example 4 selects PBTCA with poor dispersibility to compound with FOF scale inhibitor, and the coating has poor appearance before the water bath, with agglomerates. In addition, due to the high solubility of PBTCA, the coating has poor water resistance, and blisters severely after 5 days of water bath, so the contact angle and scale amount cannot be measured. In addition, compared with Examples 1-4, the amount of polytetrafluoroethylene dispersion used in Example 5 is very small, and the amount of FOF scale inhibitor is relatively large. The experimental results show that the adhesion degree of the scale is greater than that of Examples 1-4, although the hydrophobicity of the coating is not good, but the scale inhibition effect is still comparable to other examples. Without departing from the core premise of using a compounded scale inhibitor, the appropriate formula can be selected according to the actual use scene. In general, the scale inhibition coating of the present application has good scale inhibition performance and long-lasting effect, and can meet the needs of household underwater components for scale inhibition.

[0088] The above has described the embodiments of the present application in detail, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A scale-inhibiting coating, characterized in that, The coating comprises, by dry weight, the following raw materials: 40-55 parts of FOF scale inhibitor, 0.5-5 parts of scale inhibitor dispersant, and 45-225 parts of film-forming component, wherein the scale inhibitor dispersant has both dispersing and scale-inhibiting properties, and the film-forming component is an aqueous film-forming resin containing a curing agent or an aqueous film-forming resin without a curing agent; the scale inhibitor coating is prepared by the following method: mixing the scale inhibitor dispersant, FOF scale inhibitor, and water, ball milling the resulting slurry to obtain a scale inhibitor dispersion slurry, and mixing the scale inhibitor dispersion slurry and the film-forming component to obtain the scale inhibitor coating; the scale inhibitor dispersant is at least one of polyepoxysuccinate, disodium ethylenediaminetetraacetate dihydrate, polyacrylic acid, ethylenediaminetetramethylenephosphonate, or diethylenetriaminepentamethylidene phosphate.

2. The scale inhibitor coating according to claim 1, characterized in that, The aqueous film-forming resin is selected from one of aqueous epoxy resin, aqueous polyurethane resin, aqueous acrylic resin, or aqueous fluorocarbon resin.

3. The scale inhibitor coating according to claim 1, characterized in that, It also includes a pH adjuster selected from at least one of 2-phosphonobutane-1,2,4-tricarboxylic acid, diethylenetriaminepentamethylenephosphoric acid, or polyacrylic acid.

4. The scale inhibitor coating according to claim 1, characterized in that, It also includes defoamers.

5. A scale-inhibiting coating, characterized in that, It is prepared from the scale inhibitor coating described in any one of claims 1-4.

6. A scale inhibitor coating, characterized in that, The coating comprises the following raw materials by dry weight: 40-55 parts FOF scale inhibitor, 0.5-5 parts scale inhibitor dispersant, 45-225 parts film-forming component, and 1-40 parts fluororesin dispersion. The scale inhibitor dispersant possesses both dispersing and scale-inhibiting properties, and the film-forming component is an aqueous film-forming resin containing a curing agent or an aqueous film-forming resin without a curing agent. The scale-inhibiting coating is prepared by the following method: mixing the scale inhibitor dispersant, FOF scale inhibitor, and water; ball milling the resulting slurry to obtain a scale inhibitor dispersion slurry; and then mixing the scale inhibitor dispersion slurry with the fluororesin dispersion. The scale inhibitor is mixed with the film-forming components to obtain the scale inhibitor coating; the scale inhibitor dispersant is at least one of polyepoxysuccinate, disodium ethylenediaminetetraacetate dihydrate, polyacrylic acid, ethylenediaminetetramethylenephosphonate, or diethylenetriaminepentamethylidene phosphoric acid; the fluororesin dispersion is at least one of polytetrafluoroethylene dispersion or perfluoroethylene propylene dispersion; the scale inhibitor coating is prepared using the scale inhibitor coating: the scale inhibitor coating is applied to the substrate, dried and cured, the cured coating is immersed in warm water at 25℃-40℃ for 12h-36h, and then dried to obtain the scale inhibitor coating.

7. A scale-inhibiting coating, characterized in that, It is prepared from the scale inhibitor coating described in claim 6.

Images