Anti-icing and de-icing coating with self-repairing properties, preparation method and application thereof

Abstract

The present invention provides an organosilicon self-repairing anti-icing and deicing coating, and a preparation method and application thereof, which belongs to the technical field of anti-icing and deicing materials. The organosilicon self-repairing anti-icing and deicing coating provided by the present invention includes component A and component B. Through the interaction between the raw materials in component A and component B, the coating obtained by the organosilicon anti-icing and deicing coating can reduce the ice coverage strength of the surface based on its excellent self-repairing performance. The organosilicon self-repairing anti-icing and deicing coating provided by the present invention has a simple preparation process, diversified coating methods, and excellent self-repairing and deicing effects, which can meet the needs of actual applications.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-icing and deicing materials, and specifically relates to an anti-icing and deicing coating with self-repairing properties, a preparation method thereof, and applications thereof. Background Art

[0002] When ice covers the surface of outdoor infrastructure and engineering equipment, there are safety hazards that can easily cause serious casualties and significant economic losses. Anti-icing coatings applied to the surface of outdoor infrastructure will inevitably be hit by impacts such as hail, sandstorms, and high-altitude foreign objects in open-air scenes, causing serious mechanical damage to the coating surface and reducing the service life of the anti-icing coating. At the same time, mechanical damage will have a serious negative impact on the anti-icing / de-icing performance of the coating. Defects on the coating surface will induce icing, and after freezing, it will interlock with ice, increasing the difficulty of de-icing. Therefore, it is imperative to reduce the impact of surface damage on the anti-icing performance of the coating, improve the durability of the anti-icing coating in harsh environments, and develop anti-icing and de-icing coatings with self-healing properties.

[0003] Most anti-icing coatings on the market are low-surface-energy coatings containing fluorine and silicon, such as the MegaGuard Liqui Cote coating produced by Kiss-cote and the R-2180 coating produced by Nusil. These coatings are cured once and cannot repair surface damage. Chinese patents CN201410604202.7 and CN202210682820.8 respectively reported polyurethane or polyurea coatings that are self-healing based on hydrogen bonds. However, at low temperatures, there is a strong interaction between the polar groups in the coatings and ice, making them unsuitable for use in the field of anti-icing and de-icing. Chinese patent CN202211272060.X reported a photoreversible self-healing polyurea that requires additional application of ultraviolet light and visible light for photorepair. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-icing and de-icing coating with self-repairing properties, as well as its preparation method and application. The self-repairing anti-icing and de-icing coating prepared from the organosilicon self-repairing anti-icing and de-icing coating provided by the present invention has self-repairing properties, can achieve self-healing of defects such as scratches on the coating surface, and reduce the impact of mechanical damage on the anti-icing and de-icing properties of the coating. In addition, by doping with a borate polymer containing dynamic covalent bonds, it can enhance the self-repairing properties of the coating while releasing silicone oil lubricant through the dynamic responsiveness of borate to water molecules, shielding the strong interaction between polar groups in polyurethane polyurea and ice. The coating has low ice coverage strength and has good self-repairing and anti-icing and de-icing properties.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides an anti-icing and de-icing coating with self-repairing properties, comprising independently packaged components A and B;

[0007] The component A comprises the following components in percentage by weight: 10.5-48.4% of an organosilicon polyurethane polyurea resin and 51.6-89.5% of a first organic solvent; the raw materials for preparing the component A include hydroxypropyl silicone oil, polyisocyanate, an organotin catalyst, an organic diamine and the first organic solvent;

[0008] The B component includes the following components in percentage by weight: 10-66.9% of an organic borosilicic acid ester resin and 33.1-90% of a second organic solvent; the raw materials for preparing the B component include hydroxy silicone oil, boric acid and the second organic solvent.

[0009] Preferably, the mass ratio of the component A to the component B is 70 to 14.5:1.

[0010] Preferably, the first organic solvent and the second organic solvent are independently one or more of n-hexane, toluene, xylene, isopropanol, ethyl acetate and N,N-dimethylformamide.

[0011] Preferably, the preparation method of component A comprises the following steps:

[0012] In a protective gas atmosphere, hydroxypropyl silicone oil, polyisocyanate, part of the first organic solvent and an organic tin catalyst are mixed to carry out a first-stage reaction to obtain a first-stage reaction liquid;

[0013] In a protective gas atmosphere, the first-stage reaction liquid, the organic diamine and the remaining first organic solvent are mixed to carry out a second-stage reaction to obtain the A component.

[0014] Preferably, the average relative molecular weight of the hydroxypropyl silicone oil is 2000-7000; the polyisocyanate is one or more of toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate; the mass ratio of the hydroxypropyl silicone oil to the polyisocyanate is (20-70): (3.5-5); the temperature of the first stage reaction is room temperature, and the time is 3-5 hours.

[0015] Preferably, the organic diamine is hexamethylenediamine and / or butanediamine; the mass ratio of the organic diamine to the hydroxypropyl silicone oil is 1:(18-40); the temperature of the second stage reaction is room temperature, and the time is 24-48 hours.

[0016] Preferably, the preparation method of the B component comprises the following steps:

[0017] The hydroxy silicone oil, boric acid and a second organic solvent are mixed to carry out an esterification reaction to obtain the B component.

[0018] Preferably, the average relative molecular weight of the hydroxy silicone oil is 500 to 2000; the mass ratio of the hydroxy silicone oil to the boric acid is (10 to 100):1;

[0019] The temperature of the esterification reaction is 100-120° C.; the time of the esterification reaction is 0.5-1 h.

[0020] The present invention provides the use of the anti-icing and de-icing coating with self-repairing properties described in the above technical solution in the preparation of an anti-icing and de-icing coating.

[0021] Preferably, the application includes the following steps: mixing component A and component B of the anti-icing and deicing coating with self-repairing properties, coating the mixture on a substrate surface, and curing the mixture to obtain an anti-icing and deicing coating.

[0022] The present invention provides an anti-icing and de-icing coating with self-repairing properties, comprising independently packaged components A and B; the component A comprises the following components in percentage by weight: 10.5-48.4% of an organosilicon polyurethane polyurea resin and 51.6-89.5% of a first organic solvent; the raw materials for preparing the component A include hydroxypropyl silicone oil, polyisocyanate, an organotin catalyst, an organic diamine and a first organic solvent; the component B comprises the following components in percentage by weight: 10-66.9% of an organosilicon borate resin and 33.1-90% of a second organic solvent; the raw materials for preparing the component B include hydroxy silicone oil, boric acid and a second organic solvent. The anti-icing and de-icing coating with self-repairing properties provided by the present invention includes independently packaged components A and B. The present invention uses the interaction between the raw materials in components A and B to obtain hydrogen bonds and dynamic covalent bonds in the coating, which makes the coating have intrinsic self-repairing properties and can achieve self-repair of mechanical damage such as scratches; the dynamic covalent bonds of borate in the organic silicon borate resin can react with water molecules to generate free silicone oil molecules, avoiding the formation of hydrogen bonds between the polar groups in the coating and water molecules. The organic silicon self-repairing anti-icing and de-icing coating has low ice adhesion strength and good anti-icing and de-icing properties.

[0023] Compared with the prior art, the present invention is beneficial in that:

[0024] (1) The organic silicon anti-icing and de-icing coating of the present invention introduces hydrogen bonds and borate dynamic covalent bonds, which enables the anti-icing and de-icing material to repair mechanical damage multiple times and avoids the degradation of anti-icing and de-icing performance caused by damage defects.

[0025] (2) The borate covalent bonds in the organosilicon self-repairing anti-icing and de-icing coating of the present invention can react with water molecules, releasing the strong interaction between the polar groups in the free lubricant shielding coating and the water molecules, thereby realizing the application of hydrogen bond-type self-repairing coatings in the field of anti-icing and de-icing.

[0026] The present invention provides the use of the self-repairing anti-icing and de-icing coating described in the above-mentioned technical solution in the preparation of an anti-icing and de-icing coating. The anti-icing and de-icing coating is prepared by mixing an organosilicon polyurethane polyurea with an organosilicon borate resin. The organosilicon self-repairing anti-icing and de-icing coating provided by the present invention offers a simple preparation process, diverse coating methods, and excellent self-repairing and de-icing performance, meeting practical application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 These are optical microscope photos of the surfaces of the organosilicon self-repairing anti-icing and deicing coatings in Examples 1 to 5 before and after scratch repair;

[0028] Figure 2 The ice coverage strength of the carbon steel plate and the organosilicon self-repairing anti-icing and de-icing coating surface in Examples 1 to 5;

[0029] Figure 3 The ice strength performance of the organosilicon self-repairing anti-icing and deicing coating prepared in Example 1 after 40 icing-deicing cycles;

[0030] Figure 4 The ice coverage strength of the organic silicone self-repairing anti-icing and de-icing coating prepared in Example 1 after self-repair of scratches and damage and the cyclic data of the ice coverage strength of the coating after self-repair. DETAILED DESCRIPTION

[0031] The present invention provides an anti-icing and de-icing coating with self-repairing properties, comprising independently packaged components A and B;

[0032] The component A comprises the following components in percentage by weight: 10.5-48.4% of an organosilicon polyurethane polyurea resin and 51.6-89.5% of a first organic solvent; the raw materials for preparing the component A include hydroxypropyl silicone oil, polyisocyanate, an organotin catalyst, an organic diamine and the first organic solvent;

[0033] The B component includes the following components in percentage by weight: 10-66.9% of an organic borosilicic acid ester resin and 33.1-90% of a second organic solvent; the raw materials for preparing the B component include hydroxy silicone oil, boric acid and the second organic solvent.

[0034] In the present invention, unless otherwise specified, all preparation raw materials / components are commercially available products well known to those skilled in the art.

[0035] The self-repairing anti-icing and de-icing coating provided by the present invention includes a separately packaged component A. Component A comprises the following components by weight: 10.5-48.4% silicone polyurethane polyurea resin and 51.6-89.5% of a first organic solvent. Component A is prepared from raw materials including hydroxypropyl silicone oil, polyisocyanate, organotin catalyst, organic diamine, and the first organic solvent.

[0036] In the present invention, the component A preferably comprises the following components in percentage by weight: 11-45% of a silicone polyurethane polyurea resin and 55-89% of a first organic solvent. In the present invention, the first organic solvent is preferably one or more of n-hexane, toluene, xylene, isopropyl alcohol, ethyl acetate, and N,N-dimethylformamide, and more preferably one or more of n-hexane, toluene, isopropyl alcohol, and ethyl acetate.

[0037] In the present invention, the preparation method of the A component preferably comprises the following steps:

[0038] In a protective gas atmosphere, hydroxypropyl silicone oil, polyisocyanate, part of the first organic solvent and an organic tin catalyst are mixed to carry out a first-stage reaction to obtain a first-stage reaction liquid;

[0039] In a protective gas atmosphere, the first-stage reaction liquid, the organic diamine and the remaining first organic solvent are mixed to carry out a second-stage reaction to obtain the A component.

[0040] In the present invention, a hydroxypropyl silicone oil, a polyisocyanate, a portion of a first organic solvent, and an organotin catalyst are mixed in a protective gas atmosphere (hereinafter referred to as the first mixing) to conduct a first-stage reaction to obtain a first-stage reaction solution. In the present invention, the average relative molecular weight of the hydroxypropyl silicone oil is preferably 2000-7000, more preferably 2000 or 2200. The polyisocyanate is preferably one or more of toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and diphenylmethane diisocyanate, more preferably toluene diisocyanate or isophorone diisocyanate. The portion of the first organic solvent is preferably one or more of toluene, n-hexane, and xylene, more preferably n-hexane or toluene. The organotin catalyst is preferably diisobutyltin dilaurate. The mass ratio of the hydroxypropyl silicone oil to the polyisocyanate is preferably (20-70):(3.5-5), more preferably (20-22):(3.5-4), and more preferably 20:4 or 22:5. The mass ratio of the hydroxypropyl silicone oil and the portion of the first organic solvent is (20-70): (80-200), more preferably (20-22): (80-100). The mass of the organotin catalyst is preferably 0.5-1% of the mass of the polyisocyanate. The protective gas is preferably nitrogen. In the present invention, the first mixing is preferably carried out under stirring, and the stirring speed is preferably 200-500 rpm, more preferably 300 rpm. The temperature of the first stage reaction is preferably room temperature, and the time is preferably 3-5 hours, more preferably 5 hours. In the present invention, the first stage reaction is an addition reaction of an isocyanate group and a hydroxyl group.

[0041] After obtaining the first-stage reaction liquid, the present invention mixes the first-stage reaction liquid, the organic diamine, and the remaining first organic solvent in a protective gas atmosphere (hereinafter referred to as the second mixing) to conduct a second-stage reaction to obtain the A component. In the present invention, the organic diamine is preferably hexamethylenediamine and / or butanediamine. The remaining first organic solvent is preferably one or more of n-hexane, toluene, isopropanol, ethyl acetate, and N,N-dimethylformamide, more preferably one or more of n-hexane, toluene, ethyl acetate, and isopropanol, specifically preferably toluene and ethyl acetate or toluene and isopropanol, with the mass ratio of toluene to ethyl acetate preferably being 5:2. The mass ratio of toluene to isopropanol is 1:1. The mass ratio of the organic diamine to the hydroxypropyl silicone oil is preferably 1:(18-40), more preferably 1:(18-37). The present invention has no specific requirements for the amount of the remaining first organic solvent used, as long as the organic diamine is fully dissolved. The protective gas is preferably nitrogen. In the present invention, the second mixing is preferably carried out under stirring conditions, and the stirring speed is preferably 200-500 rpm, more preferably 300 rpm. The temperature of the second stage reaction is preferably room temperature, and the time is preferably 24-48 hours, more preferably 24 hours. In the present invention, the second stage reaction is an addition reaction between the isocyanate group and the amino group.

[0042] The self-repairing anti-icing and de-icing coating provided by the present invention includes a separately packaged component B. Component B comprises the following components by weight: 10-66.9% organosilicon borate resin and 33.1-90% second organic solvent; the raw materials for preparing component B include hydroxy silicone oil, boric acid, and the second organic solvent.

[0043] In the present invention, the B component preferably includes the following components in percentage by weight: 15-65% of organic borosilicate resin, 35-85% of the second organic solvent,

[0044] In the present invention, the second organic solvent is preferably one or more of n-hexane, toluene, xylene, isopropyl alcohol, ethyl acetate and N,N-dimethylformamide, more preferably isopropyl alcohol.

[0045] In the present invention, the preparation method of the B component preferably comprises the following steps:

[0046] The hydroxy silicone oil, boric acid and the second organic solvent are mixed (hereinafter referred to as the third mixture) to carry out an esterification reaction to obtain the B component.

[0047] In the present invention, the average relative molecular weight of the hydroxy silicone oil is preferably 500-2000, more preferably 550. The mass ratio of the hydroxy silicone oil to the boric acid is preferably (10-100):1, more preferably (90-100):1. The mass ratio of the boric acid to the second organic solvent is preferably 1:(50-100), more preferably 1:50. In the present invention, the third mixing is preferably carried out under stirring conditions, and the stirring speed is preferably 200-500 rpm, more preferably 400 rpm. The temperature of the esterification reaction is preferably 100-120°C, more preferably 105°C; the time of the esterification reaction is preferably 0.5-1h, more preferably 1h. The esterification reaction is an esterification reaction between boric acid and the hydroxyl groups in the silicone oil.

[0048] In the present invention, the mass ratio of the component A to the component B is preferably 70 to 14.5:1, more preferably 70 to 20:1, further preferably 60 to 25:1, and specifically preferably 70:1, 33.5:1, 21.1:1 or 14.9:1.

[0049] The present invention provides an organosilicon self-repairing anti-icing and de-icing coating, comprising component A and component B. Component A comprises the following components by weight: 10.5% to 48.4% organosilicon polyurethane polyurea resin and 51.6% to 89.5% organic solvent. Component B comprises the following components by weight: 10.0% to 66.9% organosilicon borate resin and 33.1% to 90.0% organic solvent. The mass ratio of component A to component B is (70-14.5):1. The present invention prepares an anti-icing and de-icing coating by mixing the organosilicon polyurethane polyurea and organosilicon borate resin. The hydrogen bonds and dynamic covalent bonds in the coating impart intrinsic self-healing properties, enabling self-repair of mechanical damage such as scratches. The borate dynamic covalent bonds in the organosilicon borate resin react with water molecules to form free silicone oil molecules, preventing polar groups in the coating from forming hydrogen bonds with water molecules. The organosilicon self-repairing anti-icing and de-icing coating exhibits low ice adhesion strength and excellent anti-icing and de-icing performance.

[0050] The present invention provides the use of the anti-icing and de-icing coating with self-repairing properties described in the above technical solution in the preparation of an anti-icing and de-icing coating.

[0051] In the present invention, the application preferably includes the following steps: mixing component A and component B of the anti-icing and deicing coating with self-repairing properties (hereinafter referred to as the fourth mixing), applying them on the surface of the substrate and curing them to obtain the anti-icing and deicing coating.

[0052] In the present invention, the fourth mixing method is preferably stirring and mixing. The present invention has no special requirements for the stirring method, and the stirring and mixing method familiar to those skilled in the art can be used. In the present invention, after the stirring and mixing, the present invention preferably performs defoaming. The present invention has no special requirements for the defoaming method, and the defoaming method familiar to those skilled in the art can be used. The coating is preferably spraying, dripping, brushing or spin coating. The curing is carried out under natural conditions. The curing temperature is preferably room temperature, and the curing time is preferably 24 to 48 hours, more preferably 24 hours. The obtained anti-icing and deicing coating is an organosilicon self-repairing anti-icing and deicing coating with anti-icing and deicing and self-repairing properties.

[0053] In the present invention, the thickness of the obtained organosilicon self-repairing coating is preferably 50 to 500 μm, more preferably 80 to 100 μm.

[0054] In order to further illustrate the present invention, the technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0055] Example 1

[0056] (1) Preparation of component A of silicone self-repairing anti-icing and de-icing coating

[0057] 20 g of hydroxypropyl silicone oil with a molecular weight of 2000, 4 g of isophorone diisocyanate, and 80 g of toluene were mixed, 0.02 g of diisobutyltin dilaurate was added, and the mixture was stirred at room temperature for 5 h under nitrogen protection at a stirring speed of 300 rpm.

[0058] Then, a mixed solution of 1.1 g of hexamethylenediamine, 5 g of toluene and 2 g of ethyl acetate was added to the stirrer, and the mixture was reacted for 24 hours under nitrogen protection at a stirring speed of 300 rpm to obtain component A of the silicone self-repairing anti-icing and deicing coating.

[0059] (2) Preparation of component B of silicone self-repairing anti-icing and de-icing coating

[0060] 100 g of hydroxy silicone oil with a molecular weight of 550, 1 g of boric acid and 50 g of isopropyl alcohol were mixed, stirred and reacted at 105° C. for 1 h at a stirring speed of 400 rpm to obtain component B of the silicone self-repairing anti-icing and deicing coating.

[0061] (3) Preparation of silicone self-repairing anti-icing and deicing coatings

[0062] The prepared component A and component B of the silicone self-repairing anti-icing and deicing coating were mixed in a mass ratio of 70:1, the silicone self-repairing anti-icing and deicing coating was sprayed onto a substrate, and cured at room temperature for 24 hours to obtain a silicone self-repairing anti-icing and deicing coating.

[0063] Performance Testing

[0064] The surface of the organic silicon self-repairing anti-icing and de-icing coating obtained in Example 1 was scratched with a utility knife, and the surface state of the coating after damage was observed using an optical microscope. The organic silicon self-repairing anti-icing and de-icing coating with scratches on the surface was placed in an 80°C oven and heated for 12 hours. The surface state of the coating at the original scratch was observed using an optical microscope. The test results of the self-repairing performance are shown in Figure 2. Figure 1 As shown. Figure 1 It can be seen that the scratches on the surface of the organosilicon self-repairing anti-icing and deicing coating provided in Example 1 of the present invention can be completely repaired after heating, and has good self-repairing performance.

[0065] The organic silicon self-repairing anti-icing and deicing coating obtained in Example 1 and the carbon steel plate were simultaneously fixed on a cold table at -10°C for pre-cooling for 10 minutes. Deionized water was dripped on the surface of the coating and the steel plate using a 2 cm × 2 cm mold. After freezing for 1 hour, the shear deicing force (F) of the coating and the steel plate surface was measured by a force sensor. The ice coverage strength (τ) was calculated using the formula τ = F / s, where the ice area (s) is 4 cm 2 The ice coverage intensity was measured as follows: Figure 2 As shown. Figure 2 It can be seen that compared with carbon steel plates, the organic silicon self-repairing anti-icing and de-icing coating provided by the embodiment of the present invention can significantly reduce the ice coverage strength of the surface and has good anti-icing and de-icing performance. Moreover, the low ice coverage strength of the coating surface can realize multiple icing and de-icing processes while still maintaining low ice coverage strength. Figure 3 According to Example 1, after 40 icing and deicing processes, the low ice coverage strength of <100 KPa is still maintained.

[0066] The surface of the organosilicon self-repairing anti-icing and deicing coating obtained in Example 1 was scratched with a utility knife to form a 0.5 mm wide scratch on the coating surface, and then fixed on a cold table at -10°C for pre-cooling for 10 minutes. Deionized water was dripped on the surface of the coating and the steel plate using a 2 cm × 2 cm mold. After freezing for 1 hour, the shear deicing force (F) of the coating and the steel plate surface was measured by a force sensor. The ice coverage strength (τ) of the damaged coating surface was calculated using the formula τ = F / s, where the ice area (s) is 4 cm 2 The coating repair process is to place the scratched coating in an 80℃ oven and heat it for 12 hours to complete the self-repair of the scratches. The repaired coating is then tested for deicing strength according to the same icing-deicing process as above. The icing strength of the scratched and damaged coating and the icing strength of the self-repaired coating are shown in the following cycle data. Figure 4As shown, after the coating is damaged, the surface ice coverage strength increases significantly, exceeding 250 kPa. After heat treatment and repair, the surface scratches disappear, and the coating surface ice coverage strength decreases significantly to less than 100 kPa, demonstrating excellent deicing performance. This damage-repair-and-deicing cycle can be repeated multiple times, demonstrating the coating's excellent multi-repair and easy deicing performance.

[0067] Examples 2 to 4

[0068] The difference between Examples 2 to 4 and Example 1 is that the amounts of component A and component B in the organosilicon self-repairing anti-icing and deicing coating are different, and the rest of the operations are the same. The amounts of the components used in Examples 2 to 5 are shown in Table 1.

[0069] Table 1 Amounts of coating components used in Examples 2 to 4

[0070] Example Coating components 2 Component A: Component B = 33.5:1 3 Component A: Component B = 21.1:1 4 Component A: Component B = 14.9:1

[0071] The self-repairing properties of the organic silicon self-repairing anti-icing and deicing coatings obtained in Examples 2 to 4 are as follows: Figure 1 It can be seen that the scratches on the surface of the organosilicon self-repairing anti-icing and deicing coating obtained by the present invention can be completely repaired after heating, and has good self-repairing performance.

[0072] The ice coverage strength of the organic silicon self-repairing anti-icing and de-icing coatings obtained in Examples 2 to 4 is as follows: Figure 2 It can be seen that the organosilicon self-repairing anti-icing and de-icing coating obtained by the present invention has low ice coverage strength on the surface and has good anti-icing and de-icing performance.

[0073] Example 5

[0074] (1) Preparation of component A of silicone self-repairing anti-icing and de-icing coating

[0075] 22 g of hydroxypropyl silicone oil with a molecular weight of 2200, 5 g of toluene diisocyanate, and 100 g of n-hexane were mixed, and 0.02 g of diisobutyltin dilaurate was added. The mixture was stirred at room temperature for 3 h under nitrogen protection at a stirring speed of 300 rpm.

[0076] A mixed solution of 0.6 g of butanediamine, 5 g of toluene and 5 g of isopropanol was added to a stirrer and reacted for 24 hours under nitrogen protection at a stirring speed of 300 rpm to obtain component A of the silicone self-repairing anti-icing and deicing coating.

[0077] (2) Preparation of component B of silicone self-repairing anti-icing and de-icing coating

[0078] 90 g of hydroxy silicone oil with a molecular weight of 550, 1 g of boric acid and 50 g of isopropyl alcohol were mixed, stirred and reacted at 105° C. for 1 h at a stirring speed of 400 rpm to obtain component B of the silicone self-repairing anti-icing and deicing coating.

[0079] (3) Preparation of silicone self-repairing anti-icing and deicing coating

[0080] The prepared component A and component B of the silicone self-repairing anti-icing and deicing coating were mixed in a mass ratio of 70:1, the silicone self-repairing anti-icing and deicing coating was sprayed onto the substrate, and cured at room temperature for 24 hours to obtain the silicone self-repairing anti-icing and deicing coating.

[0081] Performance Testing

[0082] According to the test method in Example 1, the self-repairing performance of the organosilicon self-repairing anti-icing and deicing coating prepared in Example 5 was measured as follows: Figure 1 As shown. Figure 1 It can be seen that the organosilicon self-repairing anti-icing and deicing coating provided by the present invention can completely repair surface scratches and has good self-repairing performance.

[0083] According to the test method in Example 1, the ice coverage strength of the organic silicon self-repairing anti-icing and deicing coating prepared in Example 5 was measured as follows: Figure 2 As shown. Figure 2 It can be seen that the organosilicon self-repairing anti-icing and deicing coating provided by the present invention can significantly reduce the ice coverage intensity of the surface and has good deicing performance.

[0084] The above examples demonstrate that the organosilicon self-repairing anti-icing and de-icing coating provided by the present invention, comprising components A and B, interacts with the raw materials in components A and B. This coating, while maintaining its excellent self-repairing properties, can also reduce surface ice buildup. The organosilicon self-repairing anti-icing and de-icing coating provided by the present invention boasts a simple preparation process, diverse coating methods, and excellent self-repairing and de-icing performance, meeting practical application requirements.

[0085] Although the above embodiment provides a detailed description of the present invention, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A method for preparing an anti-icing and de-icing coating with self-repairing properties, characterized in that: The anti-icing and de-icing coating with self-repairing properties comprises independently packaged component A and component B; The preparation method of the A component comprises the following steps: In a protective gas atmosphere, hydroxypropyl silicone oil, polyisocyanate, a portion of the first organic solvent, and an organotin catalyst are mixed, wherein the mass ratio of the hydroxypropyl silicone oil to the polyisocyanate is (20-70):(3.5-5), and a first-stage reaction is performed to obtain a first-stage reaction liquid; In a protective gas atmosphere, the first-stage reaction liquid, the organic diamine, and the remaining first organic solvent are mixed, wherein the mass ratio of the organic diamine to the hydroxypropyl silicone oil is 1:(18-40), and a second-stage reaction is performed to obtain the A component; The preparation method of the B component comprises the following steps: The hydroxy silicone oil, boric acid and a second organic solvent are mixed for esterification reaction, wherein the mass ratio of the hydroxy silicone oil to the boric acid is (10-100):1, to obtain the B component.

2. The method for preparing the anti-icing and de-icing coating with self-repairing properties according to claim 1, characterized in that: The mass ratio of the component A to the component B is 70-14.5:

1.

3. The method for preparing the anti-icing and de-icing coating with self-repairing properties according to claim 1, characterized in that: The first organic solvent used to prepare the A component and the second organic solvent used to prepare the B component are independently one or more of n-hexane, toluene, xylene, isopropyl alcohol, ethyl acetate and N,N-dimethylformamide.

4. The method for preparing the anti-icing and de-icing coating with self-repairing properties according to claim 1, characterized in that: The average relative molecular weight of the hydroxypropyl silicone oil is 2000-7000; the polyisocyanate is one or more of toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate; the temperature of the first stage reaction is room temperature, and the time is 3-5 hours.

5. The method for preparing the anti-icing and de-icing coating with self-repairing properties according to claim 1 or 4, characterized in that: The organic diamine is hexamethylenediamine and / or butanediamine; the temperature of the second stage reaction is room temperature, and the reaction time is 24 to 48 hours.

6. The method for preparing the anti-icing and de-icing coating with self-repairing properties according to claim 1, characterized in that: The average relative molecular weight of the hydroxy silicone oil is 500-2000; The temperature of the esterification reaction is 100-120° C.; the time of the esterification reaction is 0.5-1 h.

7. Use of the anti-icing and de-icing coating with self-repairing properties obtained by the preparation method according to any one of claims 1 to 6 in the preparation of anti-icing and de-icing coatings.

8. The use of the anti-icing and de-icing coating with self-repairing properties according to claim 7 in the preparation of an anti-icing and de-icing coating, characterized in that: The application includes the following steps: mixing component A and component B of the anti-icing and deicing coating with self-repairing properties, coating the mixture on a substrate surface and curing the mixture to obtain an anti-icing and deicing coating.

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