A weather-resistant anti-fouling topcoat for wind power equipment and a method for preparing the same

Abstract

The application provides a weather-resistant and anti-fouling topcoat for wind power equipment and a preparation method thereof, and belongs to the technical field of coatings. The coating is designed for equipment with high requirements for weather resistance and anti-fouling. The coating contains fluorocarbon resin, organic silicon modified acrylic resin, C8-18 fluorinated alcohol phosphate, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane, amino silane coupling agent, cyclopenta polydimethyl siloxane, lignin nano powder, titanium white, zinc phosphate, talc powder, silicon micro powder and other components. The components are used in a certain proportion, and the coating has excellent adhesion, wear resistance, weather resistance and anti-fouling property, can effectively prolong the service life of the equipment, reduce the maintenance and repair frequency and cost, and can meet higher use requirements in terms of weather resistance and anti-fouling property.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coatings, and particularly relates to a weather-resistant and anti-fouling topcoat for wind power equipment and a preparation method thereof. BACKGROUND

[0002] With the growing demand for clean energy worldwide, wind energy, as a renewable and pollution-free energy source, has been widely developed and utilized. Wind power equipment, as a key device for converting wind energy into electrical energy, operates for a long time in various complex natural environments, which puts extremely high requirements on the protective coatings of wind power equipment.

[0003] On the one hand, wind power equipment is usually installed in harsh environments such as open fields, coastal areas, and mountainous areas. In these places, the equipment faces many severe challenges. First of all, the impact of climate conditions is great. The temperature range varies greatly in different regions, from extremely cold winter to extremely hot summer. The sharp fluctuations in temperature can cause great stress on the surface coating of the equipment. For example, in cold northern regions, the winter temperature may be as low as several dozen degrees Celsius below zero, while in hot desert regions, the summer temperature may be as high as 40-50 degrees Celsius. Such temperature changes can cause the coating to expand and contract, and if the weather resistance of the coating is insufficient, cracking and peeling may easily occur.

[0004] Secondly, strong winds are also a challenge that wind power equipment must face. High-speed winds can carry sand, particulate matter, and other substances to impact the surface of the equipment. Long-term wind and sand erosion can gradually wear away the coating and reduce its protective performance. Moreover, wind power equipment in coastal areas is also subject to salt spray erosion. Salt in seawater forms salt spray in the air, which can accelerate the corrosion of metals and cause serious damage to the steel structure of the equipment. Without good coatings for protection, the service life of wind power equipment will be greatly shortened.

[0005] The existing coatings currently used by wind power equipment still have some problems, including:

[0006] I. Weather resistance

[0007] 1. Aging problem: Although existing coatings have some degree of weather resistance, they will still gradually age when exposed to outdoor environments for a long time, affected by factors such as ultraviolet light, temperature changes, humidity, etc. For example, ultraviolet light can cause the molecular chains of polymers in the coating to break, causing the coating to lose its gloss, become brittle, and even powder. In areas with large temperature differences, the coating may crack due to uneven thermal expansion and contraction, further reducing its protective performance.

[0008] 2. Limited resistance to wind and sand abrasion: Although some coatings claim to be resistant to wind and sand erosion, the coating will still gradually wear down under the long-term impact of strong winds carrying large amounts of sand and dust. Especially in areas with severe wind and sandstorms, the coating on the surface of wind power equipment may show obvious wear marks in a short period of time, reducing its protective effect on the equipment.

[0009] II. In terms of stain resistance

[0010] 1. Insufficient self-cleaning ability: Existing anti-fouling coatings have limited self-cleaning ability when faced with stubborn stains such as oil and bird droppings. These stains accumulate on the equipment surface, affecting not only aesthetics but also reducing the equipment's power generation efficiency. For example, the acidic substances in bird droppings may corrode the coating, while oil stains can obstruct airflow and affect the equipment's heat dissipation performance.

[0011] 2. Poor adaptability to different pollutants: The types and levels of pollutants vary from region to region, and existing coatings often struggle to adapt to various complex polluted environments. For example, in areas with severe industrial pollution, the air may contain large amounts of acidic gases and particulate matter, placing higher demands on the anti-fouling performance of coatings.

[0012] The construction and maintenance costs of wind power equipment are high, and repairs are difficult and expensive once equipment malfunctions. Therefore, it is necessary to develop coatings with excellent weather resistance and anti-fouling properties to extend the service life of equipment, reduce maintenance costs, and provide more reliable protection for the development of the wind power industry. Summary of the Invention

[0013] The existing coatings for wind power equipment still fail to meet the demands for higher performance in terms of weather resistance and stain resistance. This invention provides a weather-resistant and stain-resistant topcoat for wind power equipment and its preparation method. The coating contains fluorocarbon resin, organosilicon-modified acrylic resin, C8-18 fluoroalcohol phosphate, C30-45 alkyldimethylsilyl polypropylene silsesquioxane, aminosilane coupling agent, cyclopentasiloxane, lignin nanoparticles, titanium dioxide, zinc phosphate, talc, and silica powder. These components are used in a specific ratio to achieve excellent adhesion, abrasion resistance, weather resistance, and stain resistance, effectively extending the service life of the equipment and reducing maintenance and repair frequency and costs. The specific technical solution is as follows:

[0014] A weather-resistant and anti-fouling topcoat for a wind power device, the coating comprising the following raw materials by mass fraction: fluorocarbon resin 30-40 parts, silicone-modified acrylic resin 20-30 parts, C8-18 fluoroalcohol phosphate 2-3 parts, C30-45 alkyl dimethylsilyl polypropyl silyl oxide 3-5 parts, amino silane coupling agent 1-3 parts, cyclopentasiloxane 3-5 parts, lignin nano powder 1-1.5 parts, titanium white 15-20 parts, zinc phosphate 5-10 parts, talc 5-10 parts, silicon micro powder 3-8 parts, leveling agent 0.5-1 part, defoaming agent 0.5-1.5 parts, dispersant 0.5-1 part, ultraviolet absorber 0.5-1 part, antioxidant 0.5-1 part, propylene glycol methyl ether acetate 20-30 parts.

[0015] In the above coating, the particle size of the lignin nano powder is less than or equal to 1 μm.

[0016] In the above coating, the particle size of the titanium white is 10-300 μm.

[0017] In the above coating, the particle size of the zinc phosphate is less than or equal to 10 μm.

[0018] In the above coating, the particle size of the talc is less than or equal to 10 μm.

[0019] In the above coating, the particle size of the silicon micro powder is 0.5-50 μm.

[0020] In the above coating, the leveling agent is polyurethane leveling agent, model 2041; the defoaming agent is model DF-2409; the dispersant is model DH-5038; the ultraviolet absorber is model UV-1; and the antioxidant is antioxidant 1010.

[0021] The above weather-resistant and anti-fouling topcoat for a wind power device is prepared by the following steps:

[0022] S1: Airflow mix zinc phosphate, talc and silicon micro powder uniformly according to mass fraction to obtain mixed powder A;

[0023] S2: Mix lignin nano powder and C8-18 fluoroalcohol phosphate according to mass fraction, so that the lignin nano powder fully infiltrates the C8-18 fluoroalcohol phosphate, vacuum for 10-20 min to obtain mixture B;

[0024] S3: by mass parts, the leveling agent, defoaming agent, dispersing agent, ultraviolet absorber, antioxidant is added in propylene glycol methyl ether acetate, in 1500r / min~2500r / min rotational speed mixing 15min~20min, then add titanium dioxide, in 1000r / min~1500r / min rotational speed mixing 15min~20min, then add fluorocarbon resin, silicone modified acrylic resin, in 800r / min~1000r / min rotational speed mixing 20min~30min, then add mixed powder A, in 800r / min~1000r / min rotational speed mixing 15min~20min, then add mixture B, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane, cyclopenta polydimethyl siloxane, in 800r / min~1000r / min rotational speed mixing 10min~15min, finally add amino silane coupling agent, in 800r / min~1000r / min rotational speed mixing 10min~15min, get the paint.

[0025] The wind power equipment weather-resistant and anti-fouling finish paint and the preparation method thereof have the following beneficial effects:

[0026] Firstly, the paint is specially designed for equipment with high requirements of weather resistance and anti-fouling, and contains fluorocarbon resin, silicone modified acrylic resin, C8-18 fluorinated alcohol phosphate, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane, amino silane coupling agent, cyclopenta polydimethyl siloxane, lignin nano powder, titanium dioxide, zinc phosphate, talc powder, silicon powder, leveling agent, defoaming agent, dispersing agent, ultraviolet absorber, antioxidant, propylene glycol methyl ether acetate and other components. The components are used in a certain proportion, and the paint has excellent adhesion, wear resistance, weather resistance and anti-fouling property, can effectively prolong the service life of the equipment, and reduce the maintenance and repair frequency and cost.

[0027] Secondly, the C8-18 fluorinated alcohol phosphate can uniformly disperse the pigments and fillers in the paint system, prevent particle agglomeration, improve the stability and uniformity of the paint, ensure that the paint can be uniformly coated on the surface of the wind power equipment during the construction process, form a uniform coating, and improve the appearance quality and protective performance of the coating. The C8-18 fluorinated alcohol phosphate can reduce the surface tension of the paint, make the paint better wet the surface of the wind power equipment, and improve the adhesion of the paint. This is very important for the wind power equipment which is a large structure exposed to outdoor environment for a long time, can ensure that the coating is firmly attached to the surface of the equipment and is not easy to fall off. The fluorinated group contained therein has low surface energy, can make the surface of the coating have anti-fouling property, and is not easy to be attached by dust, oil stains and other pollutants. Even if there are pollutants, they can be easily washed away by rainwater, keep the surface of the equipment clean, and reduce the maintenance cost of the equipment.

[0028] Three, the polypropylsilsesquioxane structure in C30-45 alkyl dimethylsilyl polypropylsilsesquioxane has good thermal stability and chemical stability, can resist the erosion of ultraviolet light, temperature change, oxygen and other factors on the coating, improve the weather resistance of the coating. In the outdoor environment of wind power equipment, it can ensure that the coating maintains good performance for a long time, prolongs the service life of the coating. The existence of alkyl dimethylsilyl makes this component have strong hydrophobicity, which can reduce the surface energy of the coating and make it difficult for water to adhere and penetrate on the surface of the coating. This helps to prevent water from corroding wind power equipment and improves the corrosion resistance of the equipment. It can also increase the hardness, wear resistance and scratch resistance of the coating, so that the coating can resist wind and rain erosion and mechanical damage to protect the surface of the wind power equipment.

[0029] Four, lignin nano powder has high specific surface area and strength, which can form good interfacial bonding with the polymer matrix in the coating, enhance the mechanical properties of the coating, and improve the tensile strength, compressive strength and toughness of the coating. This can ensure the integrity and protective performance of the coating when the wind power equipment is subjected to wind, vibration and other forces in complex outdoor environments. Lignin has a certain ability to absorb ultraviolet light, which can reduce the damage of ultraviolet light to the coating and improve the weather resistance of the coating. In the case of long-term exposure of wind power equipment to sunlight, it can reduce the aging effect of ultraviolet light on the coating and prolong the service life of the coating.

[0030] Five, C8-18 fluoroalcohol phosphate and C30-45 alkyl dimethylsilyl polypropylsilsesquioxane have good compatibility, the low surface energy characteristics of C8-18 fluoroalcohol phosphate combined with the hydrophobic effect of C30-45 alkyl dimethylsilyl polypropylsilsesquioxane can further reduce the surface energy of the coating, making the coating have more excellent anti-fouling performance. Pollutants are difficult to adhere to the surface of the coating, even if a small amount of pollutants adhere, they are more easily removed, keeping the surface of the wind power equipment clean. The anti-ultraviolet and antioxidant properties of fluoroalcohol phosphate and the thermal stability and chemical stability of polypropylsilsesquioxane synergize with each other, which can more effectively resist the erosion of various factors in the outdoor environment on the coating, greatly improving the weather resistance of the coating. The coating of the wind power equipment is not prone to discoloration, powdering, peeling and other phenomena during long-term use, maintaining good appearance and protective performance. The dispersing effect of fluoroalcohol phosphate can make polypropylsilsesquioxane better dispersed in the coating system, avoiding its agglomeration and precipitation, improving the stability and uniformity of the coating. At the same time, the two together can reduce the viscosity of the coating and improve the flowability of the coating, making the coating easier to apply during construction and forming a uniform and smooth coating.

[0031] Six, C8-18 fluorinated alcohol phosphate and lignin nanopowder have good compatibility, the dispersant effect of fluorinated alcohol phosphate can help lignin nanopowder to disperse better in the coating system, prevent the agglomeration of lignin nanopowder, and improve the dispersion stability of lignin nanopowder in the coating. This helps to fully exert the reinforcing effect and other performance advantages of lignin nanopowder, making the performance of the coating more uniform and stable. The combination of the ultraviolet resistance and antioxidant properties of fluorinated alcohol phosphate and the ultraviolet resistance of lignin nanopowder can more effectively resist the aging effect of ultraviolet light and oxygen on the coating, improving the anti-aging performance of the coating. Prolong the service life of wind power equipment coating, reduce the maintenance and replacement frequency of the coating. The synergistic effect of the two can comprehensively exert their respective advantages, so that the coating has significantly improved adhesion, weather resistance, wear resistance, and stain resistance.

[0032] Seven, fluorocarbon resin can make the coating maintain good performance when exposed to outdoor environment for a long time, and is not prone to fading, chalking, cracking and other phenomena, prolonging the service life of the coating; It has high resistance to acids, bases, salts and other chemicals, protects the coated objects from chemical corrosion, and can firmly adhere to the surface of various substrates; The surface energy is low, and it is not easy to adsorb dust, oil stains and other pollutants, so that the coating has a certain self-cleaning function and maintains the cleanliness of the surface.

[0033] Organic silicon modified acrylic resin enhances the weather resistance and heat resistance of acrylic resin, enabling it to maintain good performance in harsh environmental conditions, increasing the hardness, flexibility, wear resistance and other physical and mechanical properties of the coating, making the coating more durable and resistant to external mechanical wear and impact; It can maintain the gloss and color stability of the coating, and it is not easy to lose gloss and discolor over a long period of use.

[0034] Amino silane coupling agent as an adhesion promoter can enhance the adhesion between the coating and the substrate, especially for inorganic substrates such as glass, metal and ceramic, significantly improving the adhesion strength of the coating and preventing the coating from falling off. As a crosslinking agent, it reacts with the resin in the coating to form a three-dimensional network structure, improving the hardness, strength and chemical resistance of the coating. By improving the adhesion between the coating and the substrate and the crosslinking density of the coating, the water resistance and weather resistance of the coating are improved, prolonging the service life of the coating.

[0035] Cyclopentasiloxane can reduce the surface tension of the coating, making it easier to flow during application and forming a smooth, flat coating, reducing surface defects and improving the appearance quality of the coating. Reducing the frictional resistance of the coating during application makes it easier to apply, improving the efficiency of the application.

[0036] Titanium dioxide has good weather resistance, and is not easy to discolor and fade under long-term light and climate changes, and can maintain the color stability of the coating. It is not easy to react with other components in the coating, ensuring the stability and reliability of the coating.

[0037] Zinc phosphate plays a role in preventing rust and corrosion in the coating, can react with the metal surface to form a dense passivation film, preventing oxygen, moisture and other corrosive substances from corroding the metal, and protecting the metal substrate.

[0038] Talc can improve the rheological property and construction performance of the coating, making the coating easier to construct and improving the construction efficiency, and can reduce the sagging, dripping and other phenomena during construction. It helps to improve the flatness and smoothness of the coating, making the coating surface more delicate and reducing the surface roughness. It has certain wear resistance, which can improve the wear resistance of the coating and prolong the service life of the coating.

[0039] Silicon powder can improve the hardness and strength of the coating, making the coating more solid and durable, resisting external mechanical wear and impact. It has good wear resistance, increasing the wear resistance of the coating. It can improve the crack resistance of the coating, reduce the cracks in the coating during drying and use, and improve the integrity and stability of the coating.

[0040] Eight, mix lignin nanometer powder and C8-18 fluorinated alcohol phosphate to make lignin nanometer powder fully soak C8-18 fluorinated alcohol phosphate, vacuumize and stand to obtain mixture B; it can make C8-18 fluorinated alcohol phosphate fully soak the surface and pores of lignin nanometer powder particles, improve the dispersibility of lignin nanometer powder and the compatibility with other components, be more easily dispersed, improve the homogeneity of the coating, not easy to agglomerate and settle, improve the coating performance, and then improve various indicators and improve the protection of the coating. DETAILED DESCRIPTION

[0041] The application will be further described below in combination with specific implementation examples, but the application is not limited to these examples.

[0042] Example 1

[0043] A wind power equipment weather-resistant and anti-fouling finish coating, the coating comprises the following raw materials in mass fraction: fluorocarbon resin 35 parts, organic silicon modified acrylic resin 35 parts, C8-18 fluorinated alcohol phosphate 2.5 parts, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane 4 parts, amino silane coupling agent 2 parts, cyclopentasiloxane 4 parts, lignin nanometer powder 1.2 parts, titanium dioxide 18 parts, zinc phosphate 7.5 parts, talc 7 parts, silicon powder 5 parts, leveling agent 0.8 parts, defoaming agent 1 part, dispersing agent 0.8 parts, ultraviolet absorber 0.7 parts, antioxidant 0.7 parts, propylene glycol methyl ether acetate 25 parts.

[0044] The preparation method of the weather-resistant and anti-fouling topcoat paint for a wind power device comprises the following steps:

[0045] S1: uniformly airflow mix zinc phosphate, talcum powder and silicon powder in mass fraction to obtain mixed powder A;

[0046] S2: mix lignin nanometer powder and C8-18 fluorinated alcohol phosphate to make the lignin nanometer powder fully infiltrate the C8-18 fluorinated alcohol phosphate, vacuumize and stand for 15 minutes to obtain mixture B;

[0047] S3: add leveling agent, defoaming agent, dispersant, ultraviolet absorber and antioxidant into propylene glycol methyl ether acetate, mix at 2000 r / min for 18 minutes, then add titanium white powder, mix at 1200 r / min for 18 minutes, then add fluorocarbon resin and silicone-modified acrylic resin, mix at 900 r / min for 25 minutes, then add mixed powder A, mix at 900 r / min for 18 minutes, then add mixture B, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane and cyclopenta dimethyl siloxane, mix at 900 r / min for 12 minutes, finally add amino silane coupling agent, mix at 900 r / min for 12 minutes to obtain the paint.

[0048] Example 2

[0049] The weather-resistant and anti-fouling topcoat paint for a wind power device comprises the following mass fractions of raw materials: fluorocarbon resin 30 parts, silicone-modified acrylic resin 20 parts, C8-18 fluorinated alcohol phosphate 2 parts, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane 3 parts, amino silane coupling agent 1 part, cyclopenta dimethyl siloxane 3 parts, lignin nanometer powder 1 part, titanium white powder 15 parts, zinc phosphate 5 parts, talcum powder 5 parts, silicon powder 3 parts, leveling agent 0.5 parts, defoaming agent 0.5 parts, dispersant 0.5 parts, ultraviolet absorber 0.5 parts, antioxidant 0.5 parts, propylene glycol methyl ether acetate 20 parts.

[0050] The preparation method of the weather-resistant and anti-fouling topcoat paint for a wind power device comprises the following steps:

[0051] S1: uniformly airflow mix zinc phosphate, talcum powder and silicon powder in mass fraction to obtain mixed powder A;

[0052] S2: mix lignin nanometer powder and C8-18 fluorinated alcohol phosphate to make the lignin nanometer powder fully infiltrate the C8-18 fluorinated alcohol phosphate, vacuumize and stand for 10 minutes to obtain mixture B;

[0053] S3: according to the mass fraction, the leveling agent, defoaming agent, dispersing agent, ultraviolet absorber, antioxidant are added into propylene glycol methyl ether acetate, mixed at 1500 r / min for 15 min, then titanium dioxide is added, mixed at 1000 r / min for 15 min, then fluorocarbon resin, silicone modified acrylic resin is added, mixed at 800 r / min for 20 min, then mixed powder A is added, mixed at 800 r / min for 15 min, then mixture B, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane, cyclopenta dimethyl siloxane is added, mixed at 800 r / min for 10 min, finally amino silane coupling agent is added, mixed at 800 r / min for 10 min, to obtain the coating.

[0054] Example 3

[0055] A weather-resistant and anti-fouling topcoat paint for wind power equipment, the paint comprising the following raw materials by mass fraction: fluorocarbon resin 32 parts, silicone modified acrylic resin 22 parts, C8-18 fluoroalcohol phosphate 2.2 parts, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane 3.5 parts, amino silane coupling agent 1.5 parts, cyclopenta dimethyl siloxane 3.5 parts, lignin nano powder 1.1 parts, titanium dioxide 16 parts, zinc phosphate 6 parts, talc 6 parts, silicon powder 4 parts, leveling agent 0.6 parts, defoaming agent 0.7 parts, dispersing agent 0.6 parts, ultraviolet absorber 0.6 parts, antioxidant 0.6 parts, propylene glycol methyl ether acetate 22 parts.

[0056] The preparation method of the above-mentioned weather-resistant and anti-fouling topcoat paint for wind power equipment, comprising the following steps:

[0057] S1: according to the mass fraction, the zinc phosphate, talc and silicon powder are air mixed uniformly to obtain mixed powder A;

[0058] S2: according to the mass fraction, the lignin nano powder and C8-18 fluoroalcohol phosphate are mixed, the lignin nano powder is fully infiltrated with C8-18 fluoroalcohol phosphate, vacuumed and stood for 10 min to obtain mixture B;

[0059] S3: Add leveling agent, defoamer, dispersant, UV absorber, and antioxidant to propylene glycol methyl ether acetate according to the mass fraction, and mix at 1800 r / min for 15 min. Then add titanium dioxide and mix at 1100 r / min for 15 min. Then add fluorocarbon resin and silicone-modified acrylic resin and mix at 800 r / min for 20 min. Then add mixed powder A and mix at 800 r / min for 15 min. Then add mixture B, C30-45 alkyl dimethicone polypropylene silsesquioxane, and cyclopentamethoxydimethylsiloxane and mix at 800 r / min for 10 min. Finally, add aminosilane coupling agent and mix at 800 r / min for 10 min to obtain the coating.

[0060] Example 4

[0061] A weather-resistant and anti-fouling topcoat for wind power equipment comprises the following raw materials in parts by weight: 38 parts fluorocarbon resin, 28 parts silicone-modified acrylic resin, 2.8 parts C8-18 fluoroalcohol phosphate, 4.5 parts C30-45 alkyl dimethylsilyl polypropylene silsesquioxane, 2.5 parts aminosilane coupling agent, 4.5 parts cyclopentamethoxydimethylsiloxane, 1.4 parts lignin nanopowder, 19 parts titanium dioxide, 9 parts zinc phosphate, 9 parts talc, 7 parts silica powder, 0.8 parts leveling agent, 1.3 parts defoamer, 0.9 parts dispersant, 0.8 parts ultraviolet absorber, 0.9 parts antioxidant, and 28 parts propylene glycol methyl ether acetate.

[0062] The preparation method of the above-mentioned weather-resistant and anti-fouling topcoat for wind power equipment includes the following steps:

[0063] S1: Zinc phosphate, talc and silica powder are mixed evenly by airflow according to the mass fractions to obtain mixed powder A;

[0064] S2: Mix lignin nanopowder and C8-18 fluorophosphate according to the mass fraction, so that the lignin nanopowder is fully impregnated with C8-18 fluorophosphate, and let stand under vacuum for 20 minutes to obtain mixture B.

[0065] S3: according to the mass fraction, the leveling agent, defoaming agent, dispersing agent, ultraviolet absorber, antioxidant are added into propylene glycol methyl ether acetate, mixed at 2300 r / min for 20 min, then titanium dioxide is added, mixed at 1400 r / min for 20 min, then fluorocarbon resin, silicone modified acrylic resin is added, mixed at 1000 r / min for 20 min, then mixed powder A is added, mixed at 1000 r / min for 15 min, then mixture B, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane, cyclopenta dimethyl siloxane is added, mixed at 1000 r / min for 10 min, finally amino silane coupling agent is added, mixed at 1000 r / min for 10 min, to obtain the coating.

[0066] Example 5

[0067] A weather-resistant and anti-fouling topcoat paint for wind power equipment, the paint comprising the following raw materials by mass fraction: fluorocarbon resin 40 parts, silicone modified acrylic resin 30 parts, C8-18 fluoroalcohol phosphate 3 parts, C30-45 alkyl dimethyl silyl polypropyl silsesquioxane 5 parts, amino silane coupling agent 3 parts, cyclopenta dimethyl siloxane 5 parts, lignin nano powder 1.5 parts, titanium dioxide 20 parts, zinc phosphate 10 parts, talc 10 parts, silicon powder 8 parts, leveling agent 1 part, defoaming agent 1.5 parts, dispersing agent 1 part, ultraviolet absorber 1 part, antioxidant 1 part, propylene glycol methyl ether acetate 30 parts.

[0068] The preparation method of the above-mentioned weather-resistant and anti-fouling topcoat paint for wind power equipment, comprising the following steps:

[0069] S1: according to the mass fraction, the phosphorus zinc, talc and silicon powder are air mixed uniformly to obtain mixed powder A;

[0070] S2: according to the mass fraction, the lignin nano powder and C8-18 fluoroalcohol phosphate are mixed, the lignin nano powder is fully infiltrated with C8-18 fluoroalcohol phosphate, vacuumed and stood for 20 min to obtain mixture B;

[0071] S3: Add leveling agent, defoamer, dispersant, UV absorber, and antioxidant to propylene glycol methyl ether acetate by mass fraction, and mix at 2500 rpm for 20 min. Then add titanium dioxide and mix at 1500 rpm for 20 min. Next, add fluorocarbon resin and silicone-modified acrylic resin and mix at 1000 rpm for 30 min. Then add mixed powder A and mix at 1000 rpm for 20 min. Next, add mixture B, C30-45 alkyl dimethsilyl polypropylene silsesquioxane, and cyclopentamethoxydimethylsiloxane and mix at 1000 rpm for 15 min. Finally, add aminosilane coupling agent and mix at 1000 rpm for 15 min to obtain the coating.

[0072] In the above embodiments: the fluorocarbon resin is model ZHM-2, sourced from Shandong Moore Chemical Co., Ltd. The organosilicon-modified acrylic resin is model SJ-106, sourced from Zongyang Sanjin Pigment Co., Ltd. C8-18 fluoroalcohol phosphate and C30-45 alkyldimethylsilyl polypropylene silsesquioxane are sourced from Lvyi (Guangzhou) Technology Service Co., Ltd. The aminosilane coupling agent is model KH-550, sourced from Guangzhou Zhongjie Chemical Technology Co., Ltd. The cyclopentasiloxane is model IOTAD5, sourced from Anhui Aiyota Silicon Oil Co., Ltd. The lignin nanoparticles have a particle size range of less than 1 μm and are sourced from Shandong Gaotang Multi-functional Lignin Co., Ltd. The titanium dioxide has a particle size range of 10 μm to 300 μm. The zinc phosphate has a particle size range of less than 10 μm. The talc has a particle size range of less than 10 μm. The silica microparticles have a particle size range of 0.5 μm to 50 μm. The leveling agent is a polyurethane leveling agent, model 2041, sourced from Laiyang Shengbang Organosilicon Technology Co., Ltd. The defoamer is model DF-2409, sourced from Dongguan Defeng Defoamer Co., Ltd.; the dispersant is model DH-5038, sourced from Suzhou Qingtian New Materials Co., Ltd.; the ultraviolet absorber is model UV-1, sourced from Dongguan Shanyi Plastics Co., Ltd.; the antioxidant is antioxidant 1010, sourced from Shanghai Kaizhi New Materials Technology Co., Ltd. Propylene glycol methyl ether acetate is sourced from Shandong Taiyu Chemical Co., Ltd.

[0073] Comparative Example 1

[0074] No C8-18 fluoroalcohol phosphate was added to the coating; other parameters and methods were the same as in Example 1.

[0075] Comparative Example 2

[0076] No C30-45 alkyl dimethicone polypropylene silsesquioxane was added to the coating; other parameters and methods were the same as in Example 1.

[0077] Comparative Example 3

[0078] No C8-18 fluoroalcohol phosphate and C30-45 alkyl dimethylsilyl polypropyl silsesquioxane were added in the coating; other parameters and methods were the same as in Example 1.

[0079] Comparative Example 4

[0080] No lignin nanopowder was added in the coating; other parameters and methods were the same as in Example 1.

[0081] Comparative Example 5

[0082] No C8-18 fluoroalcohol phosphate and lignin nanopowder were added in the coating; other parameters and methods were the same as in Example 1.

[0083] Comparative Example 6

[0084] In the preparation method, S2 did not prepare mixture B, i.e. C8-18 fluoroalcohol phosphate and lignin nanopowder were not pre-mixed. In S3, mixture B was directly replaced by C8-18 fluoroalcohol phosphate and lignin nanopowder. Other parameters and methods were the same as in Example 1.

[0085] The performance of the coatings prepared in each of the above examples and comparative examples was detected.

[0086] Test panel: the substrate was a carbon steel plate, the coating: the primer was Haohong Lao Ren's epoxy zinc-rich primer 17360-19830, the primer coating thickness was 50 μm, the topcoat was the coating of each example and each comparative example, and the topcoat coating thickness was 100 μm. The steel plate was coated according to GB / T 1727 "General preparation method of paint film".

[0087] (1) According to GB / T 1728 "Determination method of dry time of paint film and putty film", the touch method was used to detect the surface dry time of the topcoat coating;

[0088] (2) According to GB / T 9286 "Cross-hatch test of color paint and varnish film", the cross-hatch test was used to detect the adhesion: a cross-hatch device was used to cross-hatch on the surface of the test panel, the cross-hatch interval was 2 mm; after cross-hatching, the cross-hatched area was pasted with adhesive tape, and then the adhesive tape was quickly torn off, and the peeling of the coating was observed. According to the proportion of the peeling area to the total cross-hatch area, the adhesion was rated.

[0089] (3) According to GB / T 1733 "Determination of water resistance of paint film", the water resistance is detected: the test panel is placed in deionized water, 2 / 3 of the test panel is immersed in water, and the water temperature is kept at 25°C; after 120h, whether the test panel has blistering, peeling, rusting phenomenon is observed. Evaluation level: first class: the paint film completely keeps the original state, the paint film has no any loss of luster, discoloration, blistering, wrinkling, peeling, rusting and other phenomena; second class: the paint film surface has slight change, there is slight loss of luster, color slightly lighter and other relatively slight changes, but it does not affect the overall performance and appearance of the paint film; third class: the paint film surface has obvious change, there are obvious loss of luster, discoloration, blistering, wrinkling and other phenomena, but it has not reached the serious damage degree; unqualified: the paint film has serious blistering, peeling, rusting and other phenomena, the water resistance of the paint film is very poor, and it cannot meet the use requirements.

[0090] (4) According to GBT 23988 "Determination of abrasion resistance of paint by sand dropping method", the abrasion resistance is detected: the sand dropping particle size range of the impact device is 0.3mm-1mm, the impact height is 1000mm, the impact number is 1000 times, and the abrasion coefficient is calculated.

[0091] (5) According to GB / T 23987 "Artificial weathering exposure of coatings - Exposure to fluorescent UV and water", the artificial accelerated ultraviolet light aging test is used to detect the weather resistance and hydrophobicity, and the weather resistance and adhesion: a uva (340nm) light source is used, the irradiance is 0.83W / m 2 , the light irradiation is 4 hours at 60°C, the condensation is 4 hours at 50°C, the test time is 3000 hours, after aging, the contact angle measuring instrument is used to detect the coating of the test panel, the surface energy change rate is calculated, the ultraviolet weather resistance surface energy change rate=(the surface energy after aging test-the initial surface energy after drying) / the initial surface energy after drying x 100%; the grid method is used to detect the ultraviolet weather resistance adhesion grade.

[0092] (6) According to GB / T 1865-2009 "Artificial weathering and artificial radiation exposure of coatings - Filtered xenon arc radiation", the xenon lamp aging test is used to detect the weather resistance and hydrophobicity, and the weather resistance and adhesion: the test panel is placed in the xenon lamp aging test box, the irradiance control is carried out under 340nm wavelength, the irradiance setting value is 0.51W / m 2 , the blackboard temperature is set at 65°C, the temperature in the test box is 50°C in the light irradiation stage; the temperature is 20°C and the relative humidity is 55% in the dark stage. The rainfall time is 15min, the rain stopping time is 2h, the spraying pressure of the rainfall water is controlled at 0.15MPa, and the quality of the rainfall water is distilled water. The test time is 2000 hours, after aging, the contact angle measuring instrument is used to detect the coating of the test panel, the surface energy change rate is calculated, the radiation weather resistance surface energy change rate=(the surface energy after aging test-the initial surface energy after drying) / the initial surface energy after drying x 100%; the grid method is used to detect the radiation weather resistance adhesion grade.

[0093] (7) Anti-pollution test: evenly apply mud water on the surface of the test plate, but do not apply too much to cause mud water to flow. Place the test plate in an environment with a temperature of 25°C and a relative humidity of 55%, and the residence time of the pollutants on the surface of the test plate is 12 hours; clean with deionized water and a cloth for 5 minutes; clean evenly to avoid damage to the paint on the surface of the test plate. After cleaning, carefully observe the surface of the test plate with the naked eye and a magnifying glass to check for any remaining pollutants, paint discoloration, coating damage or peeling, etc. Evaluation: if there is almost no residual pollutants on the surface of the test plate, and the paint color and coating state have no obvious changes, the anti-pollution property is excellent; if there is a small amount of residual pollutants, but they can be removed by simple cleaning methods, and the paint color and coating state have no obvious changes, the anti-pollution property is good; if there are more residual pollutants that need to be removed using stronger cleaning methods, or the paint color and coating state have obvious changes, the anti-pollution property is qualified; if the pollutants cannot be removed, or the paint has serious discoloration, damage, peeling, etc., the anti-pollution property is unqualified.

[0094] The test results of the examples are shown in Table 1 below.

[0095] Table 1 Test results of the paint performance of the examples

[0096]

[0097] From the above results, it can be seen that the paints of Examples 1 to 5 have good adhesion, water resistance, wear resistance, weather resistance and anti-pollution property, which can effectively prolong the service life of the wind power equipment and reduce the maintenance frequency and cost.

[0098] The test results of the comparative examples are shown in Table 2 below.

[0099] Table 2 Test results of the paint performance of the comparative examples

[0100]

[0101]

[0102] From the above results, the coating performance of the comparative examples is decreased. From the results of Comparative Example 1, the C8-18 fluorinated alcohol phosphate can improve the stability and uniformity of the coating, reduce the surface tension of the coating, and improve the adhesion of the coating; the fluorinated group contained therein has a lower surface energy, which can make the coating surface have anti-fouling property and is not easy to be attached by dust and other pollutants; the absence of C8-18 fluorinated alcohol phosphate will make the topcoat have poor wear resistance, poor weather resistance, and especially the weather resistance adhesion grade will decrease significantly. From the results of Comparative Example 2, the polypropyl silsesquioxane structure in C30-45 alkyl dimethyl silyl polypropyl silsesquioxane has good thermal stability and chemical stability, which can resist the erosion of ultraviolet light, temperature change, oxygen and other factors on the coating, and improve the weather resistance of the coating; the presence of alkyl dimethyl silyl group makes this component have strong hydrophobicity and anti-fouling property, which can reduce the surface energy of the coating, making it difficult for water and mud to adhere and penetrate on the surface of the coating; it can also increase the wear resistance and scratch resistance of the coating, so that the coating can resist the erosion and wear of wind and rain; the absence of C30-45 alkyl dimethyl silyl polypropyl silsesquioxane will decrease the water resistance, wear resistance, weather resistance and anti-fouling property of the coating. From the results of Comparative Example 3, C8-18 fluorinated alcohol phosphate and C30-45 alkyl dimethyl silyl polypropyl silsesquioxane have good cooperation: the low surface energy property of C8-18 fluorinated alcohol phosphate combined with the hydrophobic effect of C30-45 alkyl dimethyl silyl polypropyl silsesquioxane can further reduce the surface energy of the coating, making the coating have more excellent anti-fouling performance; the anti-ultraviolet and anti-oxidation properties of fluorinated alcohol phosphate and the thermal stability and chemical stability of polypropyl silsesquioxane synergize with each other, which can more effectively resist the erosion of various factors in outdoor environment on the coating, greatly improving the weather resistance of the coating; the dispersion effect of fluorinated alcohol phosphate can make polypropyl silsesquioxane better dispersed in the coating system, improving the stability and uniformity of the coating. The absence of C8-18 fluorinated alcohol phosphate and C30-45 alkyl dimethyl silyl polypropyl silsesquioxane will affect the homogeneity of the coating, resulting in the performance of the coating being affected, the adhesion being decreased, and the anti-fouling grade, weather resistance and other properties being decreased. From the results of Comparative Example 4, lignin nano powder has a high specific surface area and strength, which can form a good interfacial bond with the polymer matrix in the coating, ensuring the integrity and protective performance of the coating; lignin has a certain ability to absorb ultraviolet light, which can reduce the damage of ultraviolet light to the coating and improve the weather resistance of the coating.The results of Comparative Example 5 show that C8-18 fluoroalcohol phosphate and lignin nanoparticles have a good synergistic effect. The dispersant effect of fluoroalcohol phosphate helps lignin nanoparticles disperse better in the coating system, prevents agglomeration, improves the dispersion stability of lignin nanoparticles in the coating, and makes the coating performance more uniform and stable. The UV resistance and antioxidant properties of fluoroalcohol phosphate combined with the UV resistance of lignin nanoparticles can more effectively resist the aging effects of UV and oxygen on the coating, improving the anti-aging performance of the coating. The synergistic effect of the two can comprehensively leverage their respective advantages, resulting in significant improvements in adhesion, weather resistance, abrasion resistance, and stain resistance of the coating. The results of Comparative Example 6 show that if C8-18 fluoroalcohol phosphate and lignin nanoparticles are not premixed, it will affect the particle penetration of C8-18 fluoroalcohol phosphate in lignin nanoparticles, reduce the dispersibility of lignin nanoparticles, and affect compatibility with other components, thus affecting the homogeneity of the coating and causing a decrease in performance indicators.

Claims

1. A weather-resistant and anti-fouling topcoat for wind power equipment, characterized in that, The coating comprises the following raw materials in parts by weight: 30-40 parts fluorocarbon resin, 20-30 parts silicone-modified acrylic resin, 2-3 parts C8-18 fluoroalcohol phosphate, 3-5 parts C30-45 alkyldimethylsilyl polypropylene silsesquioxane, 1-3 parts aminosilane coupling agent, 3-5 parts cyclopentamethoxysiloxane, 1-1.5 parts lignin nanopowder, 15-20 parts titanium dioxide, 5-10 parts zinc phosphate, 5-10 parts talc, 3-8 parts silica fume, 0.5-1 part leveling agent, 0.5-1.5 parts defoamer, 0.5-1 part dispersant, 0.5-1 part UV absorber, 0.5-1 part antioxidant, and 20-30 parts propylene glycol methyl ether acetate.

2. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The particle size range of the lignin nanopowder is below 1 μm.

3. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The particle size range of the titanium dioxide is 10μm to 300μm.

4. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The particle size range of the zinc phosphate is below 10 μm.

5. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The particle size of the talc powder is below 10 μm.

6. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The particle size range of the silicon micropowder is 0.5 μm to 50 μm.

7. The weather-resistant and anti-fouling topcoat for wind power equipment according to claim 1, characterized in that, The leveling agent is a polyurethane leveling agent, model number 2041; the defoamer is model number DF-2409; the dispersant is model number DH-5038; the ultraviolet absorber is model number UV-1; and the antioxidant is antioxidant 1010.

8. A method for preparing a weather-resistant and anti-fouling topcoat for wind power equipment, used to prepare the weather-resistant and anti-fouling topcoat for wind power equipment as described in claim 1, characterized in that, The preparation method includes the following steps: S1: Zinc phosphate, talc and silica powder are mixed evenly by airflow according to the mass fractions to obtain mixed powder A; S2: Mix lignin nanopowder and C8-18 fluorophosphate according to the mass fraction, so that the lignin nanopowder is fully impregnated with C8-18 fluorophosphate, and let stand under vacuum for 10 min to 20 min to obtain mixture B. S3: According to the mass percentages, add the leveling agent, defoamer, dispersant, UV absorber, and antioxidant to propylene glycol methyl ether acetate, and mix at 1500 rpm to 2500 rpm for 15 to 20 minutes. Then add titanium dioxide and mix at 1000 rpm to 1500 rpm for 15 to 20 minutes. Next, add fluorocarbon resin and silicone-modified acrylic resin, and mix at 800 rpm to 1000 rpm for 20 to 30 minutes. After a few minutes, add mixed powder A and mix at 800 rpm to 1000 rpm for 15 to 20 minutes. Then add mixture B, C30-45 alkyl dimethicyl polypropylene silsesquioxane, and cyclopentamethoxydimethylsiloxane and mix at 800 rpm to 1000 rpm for 10 to 15 minutes. Finally, add aminosilane coupling agent and mix at 800 rpm to 1000 rpm for 10 to 15 minutes to obtain the coating.

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