A coating for wind power and a preparation method and application thereof

Abstract

This invention relates to a coating for wind power applications, its preparation method, and its application. The coating comprises component A and component B. Component A includes a resin, flake zinc powder, a composite oxide, and additives. The composite oxide comprises rod-shaped titanium dioxide and cerium oxide. The composite oxide contains Ce... 3+ The content of cerium is 25-35% by weight of the total cerium content; component B is a curing agent. The wind power coating of the present invention has the advantages of short drying time, strong adhesion, strong impact resistance, strong salt spray resistance, and good corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power, in particular to a wind power coating, a preparation method and application thereof. BACKGROUND

[0002] Wind power coating is a special coating specially used for the surface coating of wind power equipment such as wind power blades, wind power towers and the like. With the continuous development of wind power technology and the increasing environmental protection requirements, the wind power coating industry is developing towards high performance, environmental protection, intelligence and multi-function, continuously improving the performance indicators such as weather resistance, corrosion resistance, wear resistance and the like of the coating; using more environmentally friendly raw materials and production processes to reduce the impact on the environment; applying intelligent technology to the research and development and production process of the coating to improve the quality and production efficiency of the coating; developing coating products with multiple functions such as fireproofing, heat insulation, noise reduction and the like to meet the diversified needs of wind power equipment.

[0003] Although there are various anticorrosive coatings on the market, the corrosion resistance, adhesion and weather resistance of most coatings in extreme marine environments are still not ideal, especially after long-term use, coating aging, peeling and rusting phenomena are common. These problems not only affect the appearance and service life of the equipment, but also may cause safety hazards. Therefore, developing a special coating for offshore wind power with excellent heavy-duty corrosion resistance has become a technical problem to be solved. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a wind power coating, a preparation method and application thereof. The wind power coating of the present application has the advantages of short drying time, strong adhesion, strong impact resistance, strong salt spray resistance, low corrosion current density and high corrosion potential.

[0005] To achieve the above purpose, the present application provides a wind power coating, which comprises component A and component B. The component A comprises resin, flaky zinc powder, composite oxide and additive. The composite oxide comprises rod-shaped titanium dioxide and cerium oxide. The content of Ce 3+ in the composite oxide accounts for 25-35 wt% of the total content of cerium elements; and the component B is a curing agent. In the present application, the content of Ce 3+ in the composite oxide can be but is not limited to controlled at 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%, 35 wt% and the like of the total content of cerium elements. For example, in the present application, the content of Ce 3+ in the composite oxide can be but is not limited to controlled at 25-35 wt%, 28-32 wt% and the like of the total content of cerium elements.

[0006] On the basis of the above technical solution, the content of the rod-shaped titanium dioxide is 70-95% by weight, and the content of the cerium oxide is 5-30% by weight, based on the total weight of the composite oxide.

[0007] On the basis of the above technical solution, the aspect ratio of the rod-shaped titanium dioxide is 2-10:1. The aspect ratio of the rod-shaped titanium dioxide may be, for example but not limited to, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc.

[0008] On the basis of the above technical solution, the content of the resin is 20-50% by weight, the content of the flaky zinc powder is 30-60% by weight, the content of the composite oxide is 10-20% by weight, and the content of the auxiliary agent is 10-20% by weight, based on the total weight of component A.

[0009] On the basis of the above technical solution, the curing agent is selected from an acid anhydride curing agent and / or a cationic curing agent. Preferably, the curing agent includes an acid anhydride curing agent and a cationic curing agent, and the weight ratio of the acid anhydride curing agent to the cationic curing agent is 1:0.2-0.6. The weight ratio of the acid anhydride curing agent to the cationic curing agent may be, for example but not limited to, 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6.

[0010] On the basis of the above technical solution, the acid anhydride curing agent is selected from one or more of phthalic anhydride, hexahydrophthalic anhydride, glutaric anhydride, and dodecyl succinic anhydride.

[0011] On the basis of the above technical solution, the cationic curing agent is selected from one or more of an ammonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, an aromatic phosphonium salt, an aluminum complex-based curing agent, an aromatic diazonium salt-based curing agent, and a pyridinium-based curing agent. For example but not limited to, ammonium chloride, barium chloride, boron trifluoride etherate complex, etc.

[0012] On the basis of the above technical solution, the weight ratio of component I to component II is 1:0.1-0.4, for example but not limited to, 1:0.1, 1:0.2, 1:0.3, 1:0.4.

[0013] On the basis of the above technical solution, the resin is a phenolic type epoxy resin and / or a hydroxyl-terminated polyurethane resin; preferably, the resin is a mixture of a phenolic type epoxy resin and a hydroxyl-terminated polyurethane resin.

[0014] On the basis of the above technical solution, the weight ratio of the phenolic type epoxy resin to the hydroxyl-terminated polyurethane resin is 1:0.5-0.8.

[0015] On the basis of the above technical solution, the phenolic type epoxy resin may be, but is not limited to, phenolic type epoxy resin F51.

[0016] On the basis of the above technical scheme, the auxiliary agent is selected from one or more of dispersants, thixotropic agents, leveling agents, defoaming agents, coupling agents and antioxidants.

[0017] On the basis of the above technical scheme, the dispersant is selected from one or more of carboxylate, sulfate, sulfonate, quaternary ammonium salt and pyridinium salt.

[0018] On the basis of the above technical scheme, the thixotropic agent is selected from organic bentonite and / or hydrogenated castor oil.

[0019] On the basis of the above technical scheme, the leveling agent is selected from one or more of BYK-307, BYK-310, BYK-320 and BYK-333.

[0020] On the basis of the above technical scheme, the defoaming agent is selected from BYK-072 and / or BYK-141.

[0021] On the basis of the above technical scheme, the antioxidant is selected from antioxidant 168 and / or antioxidant 1010.

[0022] On the basis of the above technical scheme, the coupling agent is selected from silane coupling agent.

[0023] The second aspect of the present application provides a preparation method of the above-mentioned wind power coating, comprising:

[0024] Step 1, dispersing rod-shaped titanium dioxide and cerium-containing soluble salt in a solvent, adding a precipitating agent and mixing, then sequentially performing refluxing, cooling, drying and calcining to obtain a composite oxide; the content of Ce in the composite oxide accounts for 25-35 wt% of the total content of cerium element; 3+ Step 2, mixing resin, flaky zinc powder, composite oxide and auxiliary agent to obtain component A;

[0025] Step 2, mixing resin, flaky zinc powder, composite oxide and auxiliary agent to obtain component A;

[0026] Step 3, mixing component B with component A; wherein the component B is a curing agent.

[0027] On the basis of the above technical scheme, the cerium-containing soluble salt can be but is not limited to cerium nitrate, cerium sulfate, etc.

[0028] On the basis of the above technical scheme, the solvent can be but is not limited to methanol, ethanol, water, etc.

[0029] On the basis of the above technical scheme, the precipitating agent can be but is not limited to urea.

[0030] On the basis of the above technical scheme, the refluxing conditions include but are not limited to: temperature of 80-100℃, time of 4-8h.

[0031] On the basis of the above technical solution, the cooling conditions include cooling to 20-25℃.

[0032] On the basis of the above technical solution, the drying conditions include but are not limited to temperature of 100-120℃ and time of 4-8h.

[0033] On the basis of the above technical solution, the calcination conditions include but are not limited to temperature of 400-600℃ and time of 2-6h.

[0034] On the basis of the above technical solution, the content of the rod-shaped titanium dioxide is 70-95wt% and the content of the cerium oxide is 5-30wt% based on the total weight of the composite oxide.

[0035] On the basis of the above technical solution, the aspect ratio of the rod-shaped titanium dioxide is 2-10:1. The aspect ratio of the rod-shaped titanium dioxide includes but is not limited to 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc.

[0036] On the basis of the above technical solution, the content of the resin is 20-50wt%, the content of the flaky zinc powder is 30-60wt%, the content of the composite oxide is 10-20wt%, and the content of the auxiliary agent is 10-20wt% based on the total weight of component A.

[0037] On the basis of the above technical solution, the curing agent is selected from anhydride curing agent and / or cationic curing agent. Preferably, the curing agent includes anhydride curing agent and cationic curing agent, and the weight ratio of the anhydride curing agent to the cationic curing agent is 1:0.2-0.6. The weight ratio of the anhydride curing agent to the cationic curing agent includes but is not limited to 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6.

[0038] On the basis of the above technical solution, the anhydride curing agent is selected from one or more of phthalic anhydride, hexahydrophthalic anhydride, glutaric anhydride, and dodecyl succinic anhydride.

[0039] On the basis of the above technical solution, the cationic curing agent is selected from one or more of ammonium salt, aromatic sulfonium salt, aromatic iodonium salt, aromatic phosphonium salt, aluminum complex-based curing agent, aromatic diazonium salt-based, and pyridinium-based curing agent. For example but not limited to ammonium chloride, barium chloride, boron trifluoride diethyl ether complex, etc.

[0040] On the basis of the above technical solution, the weight ratio of component I to component II is 1:0.1-0.4, for example but not limited to 1:0.1, 1:0.2, 1:0.3, 1:0.4.

[0041] Based on the above technical solution, the resin is a phenolic epoxy resin and / or a hydroxyl-terminated polyurethane resin; preferably, the resin is a mixture of phenolic epoxy resin and hydroxyl-terminated polyurethane resin.

[0042] Based on the above technical solution, the weight ratio of phenolic epoxy resin to hydroxyl-terminated polyurethane resin is 1:0.5-0.8.

[0043] Based on the above technical solutions, phenolic epoxy resins can be, but are not limited to, phenolic epoxy resin F51.

[0044] Based on the above technical solution, the additives are selected from one or more of dispersants, thixotropic agents, leveling agents, defoamers, coupling agents, and antioxidants.

[0045] Based on the above technical solution, the dispersant is selected from one or more of carboxylates, sulfates, sulfonates, quaternary ammonium salts, and pyridinium salts.

[0046] Based on the above technical solution, the thixotropic agent is selected from organobentonite and / or hydrogenated castor oil.

[0047] Based on the above technical solution, the leveling agent is selected from one or more of BYK-307, BYK-310, BYK-320 and BYK-333.

[0048] Based on the above technical solution, the defoamer is selected from BYK-072 and / or BYK-141.

[0049] Based on the above technical solution, the antioxidant is selected from antioxidant 168 and / or antioxidant 1010.

[0050] Based on the above technical solution, the coupling agent is selected from silane coupling agents.

[0051] The third aspect of this invention provides the application of the above-mentioned wind power coating in the field of offshore wind power.

[0052] The beneficial effects of this invention are:

[0053] (1) In this invention, Ce in the composite oxide 3+ When the content of cerium is controlled within the range of 25-35% by weight of the total cerium content, it is more conducive to preventing salt water from damaging the coating and to improving the durability of the coating when applied to offshore wind power.

[0054] (2) The crosslinking density of epoxy resin directly affects its physical and chemical properties, including hardness, strength, heat resistance, and solvent resistance. High crosslinking density generally means better mechanical properties and thermal stability, but can also cause the material to become brittle, which is particularly evident under extreme conditions such as cold and hot impact. The present invention can balance the brittleness of epoxy resin by introducing multifunctional polyurethane segments while maintaining sufficient crosslinking network density. The polyurethane segment itself has good flexibility and elasticity, which can absorb and disperse energy when the epoxy resin is impacted by external force, effectively preventing the material from cracking or breaking. This toughening effect makes the modified epoxy resin exhibit better durability and stability in harsh environments such as cold and heat, thereby improving the overall performance of the material.

[0055] (3) Anhydride curing agent is an organic substance containing acid, whose acidity comes from the anhydride group in its molecular structure. They can react with substances containing hydrogen atoms, thereby initiating a curing reaction to form a solid, durable solid. Anhydride curing agents generally have low volatility and high activity. The coating cured by anhydride curing agent usually has good weather resistance and chemical corrosion resistance, which can adapt to the complex weather conditions and chemical substance erosion in offshore wind power environment. Cationic curing agent is a new type of coating curing agent, which has high strength, high hardness, wear resistance, chemical corrosion resistance and excellent weather resistance, etc. It is a new high-tech product in the field of coating. The combination of anhydride curing agent and cationic curing agent can improve the comprehensive performance of the coating, making it better adapt to the offshore wind power environment. However, the curing speed of anhydride curing agent and cationic curing agent is different, so the proportion of their use needs to be adjusted. To prevent the excessive amount of a single component, which can lead to the degradation of the performance of the epoxy resin. The proportion of the present invention, combined with other substances, can obtain a coating for offshore wind power with better performance. DETAILED DESCRIPTION

[0056] In the following technical description, for the convenience of explanation, through multiple details, a full understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details.

[0057] The terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the terms thus used can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0058] The following is an example.

[0059] In the following examples, the raw materials are all commercially available.

[0060] Preparation Example 1

[0061] Preparation of a hydroxyl-terminated polyurethane resin:

[0062] 1000 parts by weight of dehydrated polytetrahydrofuran diol and 1 part by weight of dibutyltin dilaurate catalyst were added to a reactor, stirred and mixed, and the reactor was protected by nitrogen; the temperature was raised to 65°C, 100 parts by weight of hexamethylene diisocyanate-based polyisocyanate was added, and the addition was completed within 2 hours, and the temperature did not exceed 90°C; after the addition was completed, the internal temperature was kept at 80-90°C for 3h; finally, the sample was titrated with di-n-butylamine to determine the 8NCO content. When the test result is 0, a hydroxyl-terminated polyurethane resin is obtained.

[0063] Example 1

[0064] Preparation of a coating for wind power:

[0065] Step 1, take 27g of Ce(NO3)3·6H2O and 90g of rod-shaped rutile (aspect ratio 8:1) and add them to 720mL of water, add 9g of urea, stir until uniform, and obtain a mixed solution;

[0066] Step 2, transfer the obtained mixed solution to a flask, heat it to 80°C and reflux for 4h, cool it to 25°C after refluxing, centrifuge the obtained reaction solution, collect the solid product, dry it at 110°C for 8h, and then calcine it in a muffle furnace at 500°C for 4h to obtain a composite oxide; by XPS analysis fitting, it is found that the content of Ce 3+ in the composite oxide accounts for 32wt% of the total content of cerium elements;

[0067] Step 3, 35 g of flaky zinc powder, 15 g of the composite oxide (obtained in Step 1), 20 g of a phenolic epoxy resin F51, 15 g of a hydroxyl-terminated polyurethane resin (obtained in Preparation Example 1), 4 g of a YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain Component A.

[0068] Step 4, 100 g of hexahydrophthalic anhydride curing agent, 40 g of boron trifluoride etherate complex were mixed to obtain Component B.

[0069] Step 5, 100 g of Component A was mixed with 30 g of Component B to obtain a coating for wind power.

[0070] Example 2

[0071] A coating for wind power was prepared according to the method of Example 1, except that the composite oxide was different, i.e.:

[0072] Step 1, 21 g of Ce(NO3)3·6H2O and 100 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and the mixture was stirred to obtain a mixed solution;

[0073] Step 2, the obtained mixed solution was transferred to a flask, and was heated to 80°C to reflux for 4 h. After the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, and was dried at 110°C for 8 h, and then was calcined in a muffle furnace at 500°C for 4 h to obtain a composite oxide. The content of Ce in the composite oxide was 28 wt% of the total content of cerium elements by XPS analysis fitting; 3+

[0074] Step 3, 35 g of flaky zinc powder, 15 g of the composite oxide, 20 g of a phenolic epoxy resin F51, 15 g of a hydroxyl-terminated polyurethane resin (obtained in Preparation Example 1), 4 g of a YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain Component A.

[0075] Step 4, 100 g of hexahydrophthalic anhydride curing agent, 40 g of boron trifluoride etherate complex were mixed to obtain Component B.

[0076] Step 5, 100 g of Component A was mixed with 30 g of Component B to obtain a coating for wind power.

[0077] Example 3 ​

[0078] A wind power coating was prepared according to the method of Example 1, except that component A was different, i.e.:

[0079] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and stirred uniformly to obtain a mixed solution;

[0080] Step 2, the obtained mixed solution was transferred to a flask, and was warmed to 80°C to reflux for 4 h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8 h, and then calcined in a muffle furnace at 500°C for 4 h to obtain a composite oxide; through XPS analysis fitting, it was obtained that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+

[0081] Step 3, 30 g of flaky zinc powder, 20 g of the composite oxide, 25 g of phenolic type epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, and 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0082] Step 4, 100 g of hexahydrophthalic anhydride curing agent and 20 g of boron trifluoride etherate complex were mixed to obtain component B.

[0083] Step 5, 100 g of component A was mixed with 40 g of component B to obtain a wind power coating.

[0084] Example 4

[0085] A wind power coating was prepared according to the method of Example 1, except that component A was different, i.e.:

[0086] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and stirred uniformly to obtain a mixed solution;

[0087] Step 2, the obtained mixed solution was transferred to a flask, and was warmed to 80°C to reflux for 4 h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8 h, and then calcined in a muffle furnace at 500°C for 4 h to obtain a composite oxide; through XPS analysis fitting, it was obtained that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+ ​​

[0088] Step 3, 40 g of flaky zinc powder, 10 g of the composite oxide, 20 g of phenolic epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0089] Step 4, 100 g of hexahydrophthalic anhydride curing agent, 60 g of boron trifluoride etherate complex were mixed to obtain component B.

[0090] Step 5, 100 g of component A was mixed with 10 g of component B to obtain a coating for wind power.

[0091] Example 5

[0092] A coating for wind power was prepared according to the method of Example 1, except that component A was different, i.e.:

[0093] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and stirred uniformly to obtain a mixed solution;

[0094] Step 2, the obtained mixed solution was transferred to a flask, and was heated to 80°C to reflux for 4 h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8 h, and then calcined in a muffle furnace at 500°C for 4 h to obtain the composite oxide; by XPS analysis fitting, it was found that the content of Ce in the composite oxide accounted for 32 wt% of the total content of cerium elements; 3+

[0095] Step 3, 30 g of flaky zinc powder, 30 g of the composite oxide, 15 g of phenolic epoxy resin F51, 10 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0096] Step 4, 100 g of hexahydrophthalic anhydride curing agent, 40 g of boron trifluoride etherate complex were mixed to obtain component B.

[0097] Step 5, 100 g of component A was mixed with 30 g of component B to obtain a coating for wind power.

[0098] Example 6 ​

[0099] A wind power coating was prepared according to the method of Example 1, except that component A was different, i.e.:

[0100] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and stirred uniformly to obtain a mixed solution;

[0101] Step 2, the obtained mixed solution was transferred to a flask, and was warmed to 80°C to reflux for 4 h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8 h, and then calcined in a muffle furnace at 500°C for 4 h to obtain a composite oxide; through XPS analysis fitting, it was obtained that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+

[0102] Step 3, 45 g of flaky zinc powder, 5 g of the composite oxide, 20 g of phenolic type epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, and 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0103] Step 4, 100 g of hexahydrophthalic anhydride curing agent and 40 g of boron trifluoride etherate complex were mixed to obtain component B.

[0104] Step 5, 100 g of component A was mixed with 30 g of component B to obtain a wind power coating.

[0105] Example 7

[0106] A wind power coating was prepared according to the method of Example 1, except that component B was different, i.e.:

[0107] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and stirred uniformly to obtain a mixed solution;

[0108] Step 2, the obtained mixed solution was transferred to a flask, and was warmed to 80°C to reflux for 4 h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8 h, and then calcined in a muffle furnace at 500°C for 4 h to obtain a composite oxide; through XPS analysis fitting, it was obtained that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+ ​​

[0109] Step 3, 35 g of flaky zinc powder, 15 g of composite oxide, 20 g of phenolic epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0110] Step 4, 100 g of hexahydrophthalic anhydride curing agent, 100 g of boron trifluoride etherate complex were mixed to obtain component B.

[0111] Step 5, 100 g of component A was mixed with 30 g of component B to obtain a wind power coating.

[0112] Comparative Example 1

[0113] A wind power coating was prepared according to the method of Example 1, except that the composite oxide was replaced by flaky zinc powder, i.e.:

[0114] Step 1, 50 g of flaky zinc powder, 20 g of phenolic epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0115] Step 2, 100 g of hexahydrophthalic anhydride curing agent, 40 g of boron trifluoride etherate complex were mixed to obtain component B.

[0116] Step 3, 100 g of component A was mixed with 30 g of component B to obtain a wind power coating.

[0117] Comparative Example 2

[0118] A wind power coating was prepared according to the method of Example 1, except that the hydroxyl-terminated polyurethane resin was replaced by phenolic epoxy resin F51, i.e.:

[0119] Step 1, 27 g of Ce(NO3)3·6H2O and 90 g of rod-like rutile (aspect ratio 8:1) were added to 720 mL of water, 9 g of urea was added, and the mixture was stirred to obtain a mixed solution;

[0120] Step 2, the obtained mixed solution was transferred to a flask, which was warmed to 80°C to reflux for 4h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8h, and then calcined in a muffle furnace at 500°C for 4h to obtain a composite oxide; through XPS analysis fitting, it was found that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+

[0121] Step 3, 35g of flaky zinc powder, 15g of the composite oxide, 35g of phenolic type epoxy resin F51, 4g of YCK-2410 dispersant, 2g of hydrogenated castor oil, 3g of BYK-307 leveling agent, 2g of BYK-141 defoaming agent, 2g of antioxidant 168, 2g of Y200 fumed silica coupling agent were mixed to obtain component A.

[0122] Step 4, 100g of hexahydrophthalic anhydride curing agent, 40g of boron trifluoride ether complex were mixed to obtain component B.

[0123] Step 5, 100g of component A was mixed with 30g of component B to obtain a wind power coating.

[0124] Comparative Example 3

[0125] A wind power coating was prepared according to the method of Example 1, except that the boron trifluoride ether complex was replaced by hexahydrophthalic anhydride curing agent, i.e.

[0126] Step 1, 27g of Ce(NO3)3·6H2O and 90g of rod-like rutile (aspect ratio 8:1) were added to 720mL of water, 9g of urea was added, and the mixture was stirred uniformly to obtain a mixed solution;

[0127] Step 2, the obtained mixed solution was transferred to a flask, which was warmed to 80°C to reflux for 4h, and after the reflux was completed, it was cooled to 25°C, the obtained reaction solution was centrifuged, the solid product was collected, dried at 110°C for 8h, and then calcined in a muffle furnace at 500°C for 4h to obtain a composite oxide; through XPS analysis fitting, it was found that the content of Ce in the composite oxide accounted for 32% by weight of the total content of cerium elements; 3+

[0128] Step 3, 35g of flaky zinc powder, 15g of the composite oxide, 20g of phenolic type epoxy resin F51, 15g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4g of YCK-2410 dispersant, 2g of hydrogenated castor oil, 3g of BYK-307 leveling agent, 2g of BYK-141 defoaming agent, 2g of antioxidant 168, 2g of Y200 fumed silica coupling agent were mixed to obtain component A. ​​

[0129] Step 4, 100g of hexahydrophthalic anhydride curing agent as component B.

[0130] Step 5, 100g of component A is mixed with 30g of component B to obtain a coating for wind power.

[0131] Comparative Example 4

[0132] A coating for wind power is prepared according to the method of Example 1, except that the hexahydrophthalic anhydride curing agent is replaced by boron trifluoride etherate complex, that is:

[0133] Step 1, 27g of Ce(NO3)3·6H2O and 90g of rod-like rutile (aspect ratio 8:1) are added to 720mL of water, 9g of urea is added, and stirred uniformly to obtain a mixed solution;

[0134] Step 2, the obtained mixed solution is transferred to a flask, and is warmed to 80℃ to reflux for 4h, and after the reflux is completed, it is cooled to 25℃, the obtained reaction solution is centrifuged, the solid product is collected, dried at 110℃ for 8h, and then calcined in a muffle furnace at 500℃ for 4h to obtain a composite oxide; by XPS analysis fitting, it is obtained that the content of Ce in the composite oxide accounts for 32wt% of the total content of cerium elements; 3+

[0135] Step 3, 35g of flaky zinc powder, 15g of the composite oxide, 20g of phenolic type epoxy resin F51, 15g of hydroxyl-terminated polyurethane resin (obtained from Preparation Example 1), 4g of YCK-2410 dispersant, 2g of hydrogenated castor oil, 3g of BYK-307 leveling agent, 2g of BYK-141 defoaming agent, 2g of antioxidant 168, 2g of Y200 fumed silica coupling agent are mixed to obtain component A.

[0136] Step 4, 100g of boron trifluoride etherate complex as component B.

[0137] Step 5, 100g of component A is mixed with 30g of component B to obtain a coating for wind power.

[0138] Comparative Example 5

[0139] A coating for wind power is prepared according to the method of Example 1, except that only Ce(NO3)3·6H2O is mixed with rod-like rutile:

[0140] Step 1, 27g of Ce(NO3)3·6H2O and 90g of rod-like rutile (aspect ratio 8:1) are mixed to obtain a mixture;

[0141] ​Step 2, 35 g of flaky zinc powder, 15 g of the mixture obtained in step 1, 20 g of phenolic type epoxy resin F51, 15 g of hydroxyl-terminated polyurethane resin (obtained in Preparation Example 1), 4 g of YCK-2410 dispersant, 2 g of hydrogenated castor oil, 3 g of BYK-307 leveling agent, 2 g of BYK-141 defoaming agent, 2 g of antioxidant 168, 2 g of Y200 fumed silica coupling agent, were mixed to obtain component A.

[0142] Step 3, 100 g of hexahydrophthalic anhydride curing agent, 40 g of boron trifluoride ether complex were mixed to obtain component B.

[0143] Step 4, 100 g of component A was mixed with 30 g of component B to obtain a wind power coating.

[0144] Test Example

[0145] The wind power coatings of Examples 1-7 and Comparative Examples 1-5 were tested for performance, and the dry time, adhesion, impact resistance, salt spray resistance, corrosion current density and corrosion potential were tested, and the results are shown in Table 1.

[0146] (1) The dry time was tested according to GB / T 1728-2020, and the test temperature was 23±2℃.

[0147] (2) The adhesion was tested according to GB / T 5210-2006.

[0148] (3) The impact resistance was tested according to GB / T 1732-2020.

[0149] (4) The salt spray resistance was tested according to GB / T 1771-2007.

[0150] (5) The test method of corrosion current density and corrosion potential: RST-3000 electrochemical workstation was used to analyze the electrochemical properties of the coating, and the coating obtained from the example or the comparative example was used as the working electrode, the saturated calomel electrode was used as the reference electrode, Pt was used as the counter electrode, and 3.5% NaCl solution was used as the medium.

[0151] Table 1

[0152]

[0153] As can be seen from the above table, the wind power coating prepared by the formula of the present application has the advantages of short dry time, strong adhesion, strong impact resistance, strong salt spray resistance, low corrosion current density and high corrosion potential.

[0154] The application is not restricted to the embodiments already described and can be varied and modified in many ways. The scope of the application is only limited by the appended claims.

[0155] In the present application, each embodiment can be focused on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

Claims

1. A coating material for wind power, comprising Component A and Component B, wherein, The component A comprises a resin, flaky zinc powder, a composite oxide and an auxiliary agent, wherein the composite oxide comprises rod-like titanium dioxide and cerium oxide, the content of Ce in the composite oxide accounts for 25-35% of the total content of cerium element by weight 3+ The component B is a curing agent. The content of the rod-shaped titanium dioxide is 70-95% by weight, and the content of the cerium oxide is 5-30% by weight, based on the total weight of the composite oxide; The content of the resin is 20-50% by weight, the content of the flaky zinc powder is 30-60% by weight, the content of the composite oxide is 10-20% by weight, and the content of the auxiliary agent is 10-20% by weight, based on the total weight of component A; The curing agent is an acid anhydride curing agent and a cationic curing agent; and the resin is a mixture of a phenolic type epoxy resin and a hydroxyl-terminated polyurethane resin; The rod-shaped titanium dioxide and the cerium-containing soluble salt are dispersed in a solvent, a precipitant is added and mixed, and then refluxing, cooling, drying and calcination are sequentially performed to obtain the composite oxide.

2. The coating for wind power as claimed in claim 1, characterized by The aspect ratio of the rod-shaped titanium dioxide is 2-10:

1.

3. The coating for wind power as claimed in claim 1, characterized by The weight ratio of the acid anhydride curing agent to the cationic curing agent is 1:0.2-0.

6.

4. The coating for wind power according to claim 1, characterized in that, The acid anhydride curing agent is selected from one or more of phthalic anhydride, hexahydrophthalic anhydride, glutaric anhydride and dodecyl succinic anhydride.

5. The coating for wind power according to claim 1, characterized in that, The cationic curing agent is selected from one or more of aromatic sulfonium salts, aromatic iodonium salts, aromatic phosphonium salts, aluminum complex-based curing agents, aromatic diazonium salt-based, pyridinium-based curing agents and boron trifluoride complexes.

6. The coating for wind power according to claim 1, characterized in that, The weight ratio of component A to component B is 1:0.1-0.

4.

7. The coating for wind power according to claim 1, characterized in that, The weight ratio of the phenolic type epoxy resin to the hydroxyl-terminated polyurethane resin is 1:0.5-0.

8.

8. The coating material for wind power according to any one of claims 1 to 7, characterized in that, The auxiliary agent is selected from one or more of dispersants, thixotropic agents, leveling agents, defoaming agents, coupling agents and antioxidants.

9. The coating material for wind power according to claim 8, characterized in that, The dispersant is selected from one or more of carboxylate salts, sulfate salts, sulfonate salts, quaternary ammonium salts and pyridinium salts.

10. The coating for wind power according to claim 8, characterized in that, The thixotropic agent is selected from organic bentonite and / or hydrogenated castor oil.

11. The coating for wind power according to claim 8, characterized in that, The leveling agent is selected from one or more of BYK-307, BYK-310, BYK-320 and BYK-333.

12. The coating for wind power according to claim 8, characterized in that, The defoaming agent is selected from BYK-072 and / or BYK-141.

13. The coating for wind power according to claim 8, characterized in that, The antioxidant is selected from antioxidant 168 and / or antioxidant 1010.

14. The coating for wind power according to claim 8, characterized in that, The coupling agent is selected from silane coupling agents.

15. A method for preparing the wind power coating according to any one of claims 1-14, comprising: Step 1, dispersing rod-like titanium dioxide and a soluble salt containing cerium in a solvent, adding a precipitant and mixing, then sequentially performing refluxing, cooling, drying and calcining to obtain a composite oxide; the content of Ce in the composite oxide is 25-35 wt% of the total content of cerium elements. 3+ ​ Step 2, mixing the resin, the flaky zinc powder, the composite oxide and the auxiliary agent to obtain component A; Step 3, mixing component B with component A; wherein the component B is a curing agent.

16. The method of claim 15, wherein, The cerium-containing soluble salt is cerium nitrate and / or cerium sulfate; and / or the precipitant is urea; And / or, the refluxing conditions include a temperature of 80-90°C and a time of 4-8h; and / or, the drying conditions include a temperature of 100-120°C and a time of 4-8h; and / or, the calcination conditions include a temperature of 400-600°C and a time of 2-6h.

17. Use of the wind power coating according to any one of claims 1-14 in the field of offshore wind power.

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