Single-component high-performance polyurea coating and preparation method thereof

Abstract

The invention belongs to the technical field of polyurea coatings, and particularly relates to a single-component high-performance polyurea coating and a preparation method thereof. The europium-doped molybdenum sulfide modified polyurethane resin is prepared from the following raw materials in parts by weight: 60 to 100 parts of diisocyanate, 30 to 50 parts of a diluent, 100 to 140 parts of polyether polyol, 0.3 to 0.5 part of a flatting agent, 0.6 to 1 part of a defoaming agent, 30 to 50 parts of a silane coupling agent, 30 to 35 parts of a chain extender, 3 to 5 parts of a catalyst and 10 to 20 parts of tin phytate coated europium-doped molybdenum sulfide, and 5 to 15 parts of Cu3P ZIF-7. According to the invention, by adding the europium-doped molybdenum sulfide coated with the tin phytate and the Cu3P ZIF-7 and utilizing the interaction of the components, the flame-retardant and mechanical properties of the polyurea coating are promoted to be remarkably improved, and the polyurea coating is excellent in performance and wide in application range.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyurea coatings, and more specifically, relates to a single-component high-performance polyurea coating and a preparation method thereof. Background Art

[0002] Polyurea elastomers are widely used in defense and civil fields due to their excellent mechanical properties, waterproof and corrosion resistance. Polyurea elastomers are synthesized by the gradual polymerization of polyetheramine and isocyanate. The synthesis conditions are relatively mild and the operation is easy to control. Polyurea elastomers are flammable materials, so the flame retardant modification of polyurea is very important.

[0003] CN118325434A discloses a spray-type flame-retardant polyurea coating, including component A and component B, wherein component A is a semi-prepolymer obtained by reacting a first polyether polyol with an aromatic isocyanate. In parts by mass, component B includes: 30-50 parts of a second polyether polyol, 20-30 parts of an amine chain extender, 0.2-0.5 parts of a coupling agent, 0.2-0.5 parts of a catalyst, and 35-37 parts of a composite flame retardant. In parts by mass, the composite flame retardant includes 34-35 parts of a first flame retardant and 1-2 parts of a second flame retardant. The first flame retardant is triphenyl phosphate coated aluminum hypophosphite, and the second flame retardant is zeolite imidazole skeleton-8 modified MXene. The present invention effectively improves the interfacial interaction between the flame retardant and PUA, and the mechanical properties of the flame retardant coating are significantly improved.

[0004] CN111171687A discloses a flame retardant polyurea coating, comprising component A and component B. The volume ratio of component A to component B is (2-2.5):1. Component A is composed of oligomers formed by the reaction of aromatic isocyanate and polyol. Among them, the molar ratio of aromatic isocyanate to polyol is (2-3):1. Component B includes the following components in mass percentage: 20-30% amino resin, 20-30% chain extender, 0.5-2% leveling agent, 0.5-1% defoamer, 5-20% flame retardant, 2-5% ultraviolet shielding agent and 12-30% filler. The flame retardant polyurea coating of the present invention has excellent mechanical strength, flame retardant performance, tensile strength and high toughness, chemical corrosion resistance, and excellent electrical insulation performance. When used, component A is mixed with component B, and its reaction speed is fast, and the gel time is within 10s, which can achieve vertical spraying without flowing, and significantly improve construction efficiency.

[0005] CN113480925A discloses a method for manufacturing a high-performance solvent-free flame-retardant polyurea coating, characterized in that the coating is composed of three components A, B, and C. First, the raw material of component A is dehydrated and prepolymerized into a prepolymer; secondly, the liquid amine chain extender of component B, polyaspartic acid ester, 2,5-dichloro-p-phenylenediamine and the anti-settling agent of component C are mixed in a mixing kettle into a uniform solution, and then the pigment, flame-retardant filler and auxiliary agent of component C are added; under a certain stirring speed, the mixture is formed into a mixture of component D; then the prepolymer of component A and the mixture of component D are mixed with the main components at a ratio of 1:1 mol / mol to form a polyurea coating to complete the manufacture of the flame-retardant polyurea coating. The coating has excellent mechanical properties and performance, is simple to operate, and is widely applicable. It is suitable for flame retardant protection of interior walls of houses, transportation vehicles, aircraft, and interior decoration of ships. The coating is suitable for manual construction or / and spraying.

[0006] CN107916056A discloses a halogen-free flame retardant and a flame-retardant polyurea elastomer coating, wherein the halogen-free flame retardant comprises organic aluminum hypophosphite, polytetrafluoroethylene, ammonium polyphosphate and dipentaerythritol. The flame retardant of the present invention is compounded with organic aluminum hypophosphite, polytetrafluoroethylene powder, ammonium polyphosphate and dipentaerythritol, and generates a large amount of carbides after combustion to form a carbonized layer to prevent the substrate from continuing to burn, and it can also prevent melting and dripping, and it also has the characteristics of good thermal stability and low smoke generation.

[0007] From the above content, it can be seen that the flame retardant properties of polyurea coatings can be improved by adding flame retardant materials during the preparation of polyurea. The present invention provides a one-component high-performance polyurea coating having excellent flame retardant properties and mechanical properties. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the defects and shortcomings of the prior art, and provide a one-component high-performance polyurea coating and a preparation method thereof. In parts by weight, the following raw materials are included: 60-100 parts of diisocyanate, 30-50 parts of diluent, 100-140 parts of polyether polyol, 0.3-0.5 parts of leveling agent, 0.6-1 parts of defoamer, 30-50 parts of silane coupling agent, 30-35 parts of chain extender, 3-5 parts of catalyst, 10-20 parts of phytic acid tin-coated europium-doped molybdenum sulfide; 5-15 parts of Cu3P@ZIF-7. In the present invention, by adding phytic acid tin-coated europium-doped molybdenum sulfide and Cu3P@ZIF-7, the interaction of the above components is utilized to promote the significant improvement of the flame retardancy and mechanical properties of the polyurea coating, and the performance is excellent and the application range is wide.

[0009] The object of the present invention is to provide a one-component high-performance polyurea coating.

[0010] Another object of the present invention is to provide a method for preparing a one-component high-performance polyurea coating.

[0011] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0012] A one-component high-performance polyurea coating, comprising the following raw materials in parts by weight:

[0013] 60-100 parts of diisocyanate, 30-50 parts of diluent, 100-140 parts of polyether polyol, 0.3-0.5 parts of leveling agent, 0.6-1 parts of defoamer, 30-50 parts of silane coupling agent, 30-35 parts of chain extender, 3-5 parts of catalyst, 10-20 parts of phytic acid tin-coated europium-doped molybdenum sulfide; 5-15 parts of Cu3P@ZIF-7.

[0014] Preferably, the diisocyanate is at least one of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), and dicyclohexylmethane diisocyanate (HMDI); the diluent is selected from at least one of isopropanol, acetone, and ethanol; and the polyether polyol is polyether polyol 635, polyether polyol 450, or polyether polyol 4110.

[0015] Preferably, the leveling agent is polydimethylsiloxane; the defoaming agent is selected from JX883 silicone defoaming agent; the silane coupling agent is at least one of KH-550, KH-560, and KH-570; the chain extender is at least one of diethyltoluenediamine, dimethylthiotoluenediamine, and diethyltoluenediamine; and the catalyst is dibutyltin dilaurate.

[0016] In the present invention, a preferred technical solution is that the method for preparing the tin phytate-coated europium-doped molybdenum sulfide comprises the following steps:

[0017] (1) dissolving a molybdenum source, a europium source and thiourea in deionized water and stirring to obtain a mixed solution; then performing a hydrothermal reaction, washing, and vacuum drying at 60-90° C. to constant weight to obtain europium-doped MoS2;

[0018] (2) Add the europium-doped MoS2, phytic acid and tin source obtained in step (1) to deionized water, ultrasonically disperse for 20 to 40 minutes, then react at 70 to 90°C for 2 to 4 hours, cool to room temperature, filter, wash, and vacuum dry at 60 to 90°C to constant weight to obtain europium-doped molybdenum sulfide coated with phytic acid tin.

[0019] Preferably, in step (1), the europium source is at least one of europium nitrate, europium chloride and europium acetate; the molybdenum source includes at least one of sodium molybdate, potassium molybdate or ammonium molybdate; the molar ratio of the molybdenum source, the europium source and the thiourea is 1:0.03~0.07:3~7, and the hydrothermal reaction conditions are 180~220°C for 8~16h.

[0020] Preferably, in step (2), the tin source is at least one of tin tetrachloride, tin sulfate and tin acetate; and the ratio of the europium-doped MoS2, phytic acid and tin source is 10 g: 1 mmol: 3-5 mmol.

[0021] In the present invention, a further preferred technical solution is that the preparation method of Cu3P@ZIF-7 comprises the following steps:

[0022] (1) Dissolve copper salt, yellow phosphorus and surfactant in a certain amount of deionized water in turn, stir to mix evenly to obtain a mixed solution; then perform hydrothermal reaction at 180-240°C for 4-8 hours, cool to room temperature, filter, wash, and then dry at 70-90°C for 10-16 hours to obtain Cu3P;

[0023] (2) The Cu3P, benzimidazole and zinc source obtained in step (1) are dispersed in a mixed solution of methanol and DMF, and then stirred at 40-60°C for 8-12 hours, cooled to room temperature, washed, and then dried at 60-80°C to constant weight to obtain Cu3P@ZIF-7.

[0024] Preferably, in step (1), the molar ratio of the copper salt to yellow phosphorus is 1:3-5, and the ratio of the copper salt to the surfactant added is 1mmol:0.1-0.3g; the copper salt is one of copper nitrate, copper acetate or copper chloride; and the surfactant is selected from dioctyl sodium succinate and / or hexadecyltrimethylammonium bromide.

[0025] Preferably, in step (2), the volume ratio of methanol to DMF is 1:1; the ratio of Cu3P, benzimidazole and zinc source is 10 g:7 mmol:54-58 mmol; and the zinc source is at least one of zinc nitrate, zinc chloride and zinc acetate.

[0026] Based on the above-mentioned method for preparing a one-component high-performance polyurea coating, the preparation method comprises the following steps:

[0027] (1) Mix polyether polyol, leveling agent, defoamer and chain extender, stir and heat to 100-110°C, and dehydrate under vacuum for 1-2 hours;

[0028] (2) Under the protection of inert gas, the system in step (1) is cooled to 60-80°C, and tin phytate-coated europium-doped molybdenum sulfide, Cu3P@ZIF-7, silane coupling agent and diluent are added, stirred for 1-3 hours, and then diisocyanate and catalyst are added, and the reaction is continued by stirring for 3-5 hours. The material is discharged to obtain a single-component high-performance polyurea coating.

[0029] The present invention has the following beneficial effects:

[0030] Molybdenum disulfide is a compound similar to a layered structure, with good thermal stability and low thermal conductivity. It provides protection by playing a lamellar barrier effect during the pyrolysis and combustion of polymer materials. Tin phytate coating can not only improve the compatibility of molybdenum disulfide in the polyurea system, thereby effectively improving the flame retardant properties of polyurea coatings, but also improve the mechanical properties of polyurea coatings; the addition of copper phosphide can promote the performance of a dense and uniform carbon layer, which can effectively play a flame retardant effect, and further improve the flame retardant and mechanical properties of polyurea coatings by compounding with ZIF-7. Moreover, the prepared polyurea coating has excellent application prospects. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to specific examples, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0032] Unless otherwise specified, the reagents and materials used in the following examples are commercially available.

[0033] Example 1

[0034] A one-component high-performance polyurea coating, comprising the following raw materials in parts by weight:

[0035] 80 parts of diisocyanate, 40 parts of diluent, 120 parts of polyether polyol, 0.4 parts of leveling agent, 0.8 parts of defoamer, 40 parts of silane coupling agent, 32 parts of chain extender, 4 parts of catalyst, 15 parts of europium doped molybdenum sulfide coated with tin phytate; 10 parts of Cu3P@ZIF-7;

[0036] The diisocyanate is diphenylmethane diisocyanate (MDI);

[0037] The diluent is acetone;

[0038] The polyether polyol is polyether polyol 450;

[0039] The leveling agent is polydimethylsiloxane;

[0040] The defoamer is selected from JX883 silicone defoamer;

[0041] The silane coupling agent is KH-560;

[0042] The chain extender is dimethylthiotoluenediamine;

[0043] The catalyst is dibutyltin dilaurate;

[0044] The preparation method of tin phytate-coated europium-doped molybdenum sulfide comprises the following steps:

[0045] (1) Dissolve 1 mol of ammonium molybdate, 0.05 mol of europium nitrate and 5 mol of thiourea in 250 mL of deionized water and stir to obtain a mixed solution; then perform a hydrothermal reaction at 200° C. for 12 h, wash and vacuum dry at 80° C. to constant weight to obtain europium-doped MoS2;

[0046] (2) Add 10 g of the europium-doped MoS2 obtained in step (1), 1 mmol of phytic acid and 4 mmol of tin tetrachloride to 150 mL of deionized water, and ultrasonically disperse for 30 min. Then react at 80 °C for 3 h, cool to room temperature, filter, wash, and vacuum dry at 80 °C to constant weight to obtain europium-doped molybdenum sulfide coated with phytic acid tin.

[0047] The preparation method of Cu3P@ZIF-7 comprises the following steps:

[0048] (1) 1 mmol of copper nitrate, 4 mmol of yellow phosphorus and 0.2 g of sodium dioctyl succinate sulfonate were dissolved in 150 mL of deionized water, stirred to mix evenly to obtain a mixed solution; then hydrothermally reacted at 200 °C for 6 h, cooled to room temperature, filtered, washed, and then dried at 80 °C for 14 h to obtain Cu3P;

[0049] (2) Disperse 10 g of the Cu3P obtained in step (1), 7 mmol of benzimidazole and 56 mmol of zinc nitrate into a mixed solution of 300 mL of methanol and DMF, wherein the volume ratio of methanol to DMF is 1:1; then stir and react at 50 °C for 10 h, cool to room temperature, wash, and then dry at 70 °C to constant weight to obtain Cu3P@ZIF-7.

[0050] A method for preparing a one-component high-performance polyurea coating, the preparation method comprising the following steps:

[0051] (1) Mix polyether polyol, leveling agent, defoamer and chain extender, stir and heat to 105°C, and dehydrate under vacuum for 1.5 hours;

[0052] (2) Under the protection of inert gas, the system in step (1) was cooled to 70°C, and tin phytate-coated europium-doped molybdenum sulfide, Cu3P@ZIF-7, silane coupling agent and diluent were added and stirred for 2 h. Then, diisocyanate and catalyst were added and the reaction was continued with stirring for 4 h. The mixture was discharged to obtain a single-component high-performance polyurea coating.

[0053] Example 2

[0054] A one-component high-performance polyurea coating, comprising the following raw materials in parts by weight:

[0055] 100 parts of diisocyanate, 30 parts of diluent, 140 parts of polyether polyol, 0.3 parts of leveling agent, 1 part of defoamer, 30 parts of silane coupling agent, 35 parts of chain extender, 3 parts of catalyst, 20 parts of phytic acid tin-coated europium-doped molybdenum sulfide; 75 parts of Cu3P@ZIF-;

[0056] The diisocyanate is isophorone diisocyanate (IPDI);

[0057] The diluent is isopropanol;

[0058] The polyether polyol is polyether polyol 635;

[0059] The leveling agent is polydimethylsiloxane;

[0060] The defoamer is selected from JX883 silicone defoamer;

[0061] The silane coupling agent is KH-550;

[0062] The chain extender is diethyltoluenediamine;

[0063] The catalyst is dibutyltin dilaurate;

[0064] The preparation method of tin phytate-coated europium-doped molybdenum sulfide comprises the following steps:

[0065] (1) Dissolve 1 mol potassium molybdate, 0.07 mol europium chloride and 3 mol thiourea in 250 mL deionized water and stir to obtain a mixed solution; then perform a hydrothermal reaction at 220° C. for 8 h, wash and vacuum dry at 90° C. to constant weight to obtain europium-doped MoS2;

[0066] (2) Add 10 g of the europium-doped MoS2 obtained in step (1), 1 mmol of phytic acid and 5 mmol of tin sulfate to 150 mL of deionized water, and ultrasonically disperse for 40 min. Then react at 90 °C for 2 h, cool to room temperature, filter, wash, and vacuum dry at 90 °C to constant weight to obtain europium-doped molybdenum sulfide coated with tin phytate.

[0067] The preparation method of Cu3P@ZIF-7 comprises the following steps:

[0068] (1) 1 mmol of copper acetate, 5 mmol of yellow phosphorus and 0.3 g of hexadecyltrimethylammonium bromide were dissolved in 150 mL of deionized water in sequence, and stirred to mix evenly to obtain a mixed solution; then, a hydrothermal reaction was performed at 240°C for 4 h, cooled to room temperature, filtered, washed, and then dried at 90°C for 10 h to obtain Cu3P;

[0069] (2) Disperse 10 g of the Cu3P obtained in step (1), 7 mmol of benzimidazole and 58 mmol of zinc chloride into a mixed solution of 300 mL of methanol and DMF, wherein the volume ratio of methanol to DMF is 1:1; then stir and react at 60 °C for 8 h, cool to room temperature, wash, and then dry at 80 °C to constant weight to obtain Cu3P@ZIF-7.

[0070] The preparation method of a one-component high-performance polyurea coating is the same as that of Example 1.

[0071] Example 3

[0072] A one-component high-performance polyurea coating, comprising the following raw materials in parts by weight:

[0073] 60 parts of diisocyanate, 50 parts of diluent, 100 parts of polyether polyol, 0.5 parts of leveling agent, 0.6 parts of defoamer, 50 parts of silane coupling agent, 30 parts of chain extender, 5 parts of catalyst, 10 parts of europium doped molybdenum sulfide coated with tin phytate; 15 parts of Cu3P@ZIF-7;

[0074] The diisocyanate is dicyclohexylmethane diisocyanate (HMDI);

[0075] The diluent is ethanol;

[0076] The polyether polyol is polyether polyol 4110;

[0077] The leveling agent is polydimethylsiloxane;

[0078] The defoamer is selected from JX883 silicone defoamer;

[0079] The silane coupling agent is KH-570;

[0080] The chain extender is diethyltoluenediamine;

[0081] The catalyst is dibutyltin dilaurate;

[0082] The preparation method of tin phytate-coated europium-doped molybdenum sulfide comprises the following steps:

[0083] (1) Dissolve 1 mol of sodium molybdate, 0.03 mol of europium acetate and 7 mol of thiourea in 250 mL of deionized water and stir to obtain a mixed solution; then perform a hydrothermal reaction at 180° C. for 16 h, wash, and vacuum dry at 60° C. to constant weight to obtain europium-doped MoS2;

[0084] (2) Add 10 g of the europium-doped MoS2 obtained in step (1), 1 mmol of phytic acid and 3 mmol of tin acetate to 150 mL of deionized water, and ultrasonically disperse for 20 min. Then react at 70 °C for 4 h, cool to room temperature, filter, wash, and vacuum dry at 60 °C to constant weight to obtain europium-doped molybdenum sulfide coated with tin phytate.

[0085] The preparation method of Cu3P@ZIF-7 comprises the following steps:

[0086] (1) 1 mmol of copper chloride, 3 mmol of yellow phosphorus and 0.1 g of sodium dioctyl succinate sulfonate were dissolved in 150 mL of deionized water, stirred to mix evenly to obtain a mixed solution; then, the mixture was hydrothermally reacted at 180°C for 8 h, cooled to room temperature, filtered, washed, and then dried at 70°C for 16 h to obtain Cu3P;

[0087] (2) Disperse 10 g of the Cu3P obtained in step (1), 7 mmol of benzimidazole and 54 mmol of zinc acetate into a mixed solution of 300 mL of methanol and DMF, wherein the volume ratio of methanol to DMF is 1:1; then stir and react at 40 °C for 12 h, cool to room temperature, wash, and then dry at 60 °C to constant weight to obtain Cu3P@ZIF-7.

[0088] The preparation method of a one-component high-performance polyurea coating is the same as that of Example 1.

[0089] Comparative Example 1

[0090] Comparative Example 1 is substantially the same as Example 1 except that an equal amount of phytate-coated molybdenum sulfide is used to replace phytate-coated europium-doped molybdenum sulfide, and the preparation method of the phytate-coated molybdenum sulfide comprises the following steps:

[0091] (1) Dissolve 1.05 mol of ammonium molybdate and 5 mol of thiourea in 250 mL of deionized water and stir to obtain a mixed solution; then perform a hydrothermal reaction at 200°C for 12 h, wash, and vacuum dry at 80°C to constant weight to obtain MoS2;

[0092] (2) Add 10 g of MoS2 obtained in step (1), 1 mmol of phytic acid and 4 mmol of tin tetrachloride to 150 mL of deionized water, ultrasonically disperse for 30 min, then react at 80 °C for 3 h, cool to room temperature, filter, wash, and vacuum dry at 80 °C to constant weight to obtain phytate-coated molybdenum sulfide.

[0093] Comparative Example 2

[0094] Comparative Example 2 is substantially the same as Example 1 except that an equal amount of europium-doped molybdenum sulfide is used to replace the europium-doped molybdenum sulfide coated with tin phytate, and the preparation method of the europium-doped molybdenum sulfide comprises the following steps:

[0095] 1 mol of ammonium molybdate, 0.05 mol of europium nitrate and 5 mol of thiourea were dissolved in 250 mL of deionized water and stirred to obtain a mixed solution; a hydrothermal reaction was then carried out under the conditions of 200° C. for 12 h, followed by washing and vacuum drying at 80° C. to constant weight to obtain europium-doped MoS2.

[0096] Comparative Example 3

[0097] Comparative Example 3 is substantially the same as Example 1 except that an equal amount of Cu3P is used to replace Cu3P@ZIF-7, and the preparation method of Cu3P comprises the following steps:

[0098] Take 1mmol copper nitrate, 4mmol yellow phosphorus and 0.2g sodium dioctyl succinate sulfonate and dissolve them in 150mL deionized water in turn, stir to mix them evenly to obtain a mixed solution; then hydrothermally react at 200℃ for 6h, cool to room temperature, filter, wash, and then dry at 80℃ for 14h to obtain Cu3P.

[0099] Comparative Example 4

[0100] Comparative Example 4 is substantially the same as Example 1 except for the difference that an equal amount of tin phytate-coated europium-doped molybdenum sulfide is used to replace Cu3P@ZIF-7.

[0101] Comparative Example 5

[0102] Comparative Example 5 is substantially the same as Example 1 except for the difference that 8 parts of tin phytate-coated europium doped molybdenum sulfide are used.

[0103] Comparative Example 6

[0104] Comparative Example 6 is substantially the same as Example 1 except for the difference that 22 parts of tin phytate-coated europium-doped molybdenum sulfide are used.

[0105] The performance of Examples 1-3 and Comparative Examples 1-6 was tested. The specific test results are shown in Table 1, where:

[0106] Tensile strength: Tested in accordance with HG / T 3831-2006;

[0107] Limiting Oxygen Index (LOI): carried out in accordance with ASTM D2863 standard.

[0108] Table 1:

[0109] Tensile strength (MPa) Limiting oxygen index (LOI) / % Example 1 19.4 40.5 Example 2 18.7 39.6 Example 3 19.1 40.2 Comparative Example 1 39.2 Comparative Example 2 17.8 38.4 Comparative Example 3 18.1 38.6 Comparative Example 4 17.2 36.7 Comparative Example 5 18.6 39.1 Comparative Example 6 18.3 38.9

[0110] As can be seen from Table 1, the one-component high-performance polyurea coating prepared by the present invention has excellent tensile strength and flame retardant properties, with a tensile strength of up to 19.4 MPa and a limiting oxygen index of up to 40.5%. In addition, from the comparison between Example 1 and Comparative Examples 1-6, it can be seen that the components selected in the preparation process of the present invention have a synergistic effect, which jointly promotes the improvement of the performance of the polyurea coating, making it have excellent application prospects.

[0111] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A one-component high-performance polyurea coating, characterized in that: By weight, it includes the following raw materials: 60-100 parts of diisocyanate, 30-50 parts of diluent, 100-140 parts of polyether polyol, 0.3-0.5 parts of leveling agent, 0.6-1 parts of defoamer, 30-50 parts of silane coupling agent, 30-35 parts of chain extender, 3-5 parts of catalyst, 10-20 parts of phytic acid tin-coated europium-doped molybdenum sulfide; 5-15 parts of Cu3P@ZIF-7.

2. A one-component high-performance polyurea coating according to claim 1, characterized in that: The diisocyanate is at least one of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), and dicyclohexylmethane diisocyanate (HMDI); the diluent is at least one of isopropanol, acetone, and ethanol; and the polyether polyol is polyether polyol 635, polyether polyol 450, or polyether polyol 4110.

3. The one-component high-performance polyurea coating according to claim 1, characterized in that: The leveling agent is polydimethylsiloxane; the defoamer is selected from JX883 silicone defoamer; the silane coupling agent is at least one of KH-550, KH-560, and KH-570; the chain extender is at least one of diethyltoluenediamine, dimethylthiotoluenediamine, and diethyltoluenediamine; and the catalyst is dibutyltin dilaurate.

4. The one-component high-performance polyurea coating according to claim 1, characterized in that: The preparation method of the tin phytate-coated europium-doped molybdenum sulfide comprises the following steps: (1) dissolving a molybdenum source, a europium source and thiourea in deionized water and stirring to obtain a mixed solution; then performing a hydrothermal reaction, washing, and vacuum drying at 60-90° C. to constant weight to obtain europium-doped MoS2; (2) Add the europium-doped MoS2, phytic acid and tin source obtained in step (1) to deionized water, ultrasonically disperse for 20 to 40 minutes, then react at 70 to 90°C for 2 to 4 hours, cool to room temperature, filter, wash, and vacuum dry at 60 to 90°C to constant weight to obtain europium-doped molybdenum sulfide coated with phytic acid tin.

5. A one-component high-performance polyurea coating according to claim 4, characterized in that: In step (1), the europium source is at least one of europium nitrate, europium chloride, and europium acetate; the molybdenum source includes at least one of sodium molybdate, potassium molybdate, or ammonium molybdate; the molar ratio of the molybdenum source, the europium source, and thiourea is 1:0.03-0.07:3-7, and the hydrothermal reaction conditions are 180-220°C for 8-16 hours.

6. A one-component high-performance polyurea coating according to claim 4, characterized in that: In step (2), the tin source is at least one of tin tetrachloride, tin sulfate, and tin acetate; the ratio of the europium-doped MoS2, phytic acid, and tin source is 10 g: 1 mmol: 3-5 mmol.

7. The one-component high-performance polyurea coating according to claim 1, characterized in that: The preparation method of Cu3P@ZIF-7 comprises the following steps: (1) Dissolve copper salt, yellow phosphorus and surfactant in a certain amount of deionized water in turn, stir to mix evenly to obtain a mixed solution; then perform hydrothermal reaction at 180-240°C for 4-8 hours, cool to room temperature, filter, wash, and then dry at 70-90°C for 10-16 hours to obtain Cu3P; (2) The Cu3P, benzimidazole and zinc source obtained in step (1) are dispersed in a mixed solution of methanol and DMF, and then stirred at 40-60°C for 8-12 hours, cooled to room temperature, washed, and then dried at 60-80°C to constant weight to obtain Cu3P@ZIF-7.

8. The one-component high-performance polyurea coating according to claim 7, characterized in that: In step (1), the molar ratio of the copper salt to yellow phosphorus is 1:3-5, and the ratio of the copper salt to the surfactant added is 1mmol:0.1-0.3g; the copper salt is one of copper nitrate, copper acetate or copper chloride; and the surfactant is selected from dioctyl sodium succinate and / or hexadecyl trimethylammonium bromide.

9. The one-component high-performance polyurea coating according to claim 7, characterized in that: In step (2), the volume ratio of methanol to DMF is 1:1; the ratio of Cu3P, benzimidazole and zinc source is 10 g:7 mmol:54-58 mmol; and the zinc source is at least one of zinc nitrate, zinc chloride and zinc acetate.

10. A method for preparing a one-component high-performance polyurea coating according to any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: (1) Mix polyether polyol, leveling agent, defoamer and chain extender, stir and heat to 100-110°C, and dehydrate under vacuum for 1-2 hours; (2) Under the protection of inert gas, the system in step (1) is cooled to 60-80°C, and tin phytate-coated europium-doped molybdenum sulfide, Cu3P@ZIF-7, silane coupling agent and diluent are added, stirred for 1-3 hours, and then diisocyanate and catalyst are added, and the reaction is continued by stirring for 3-5 hours. The material is discharged to obtain a single-component high-performance polyurea coating.