Preparation method of rapid repairing coating for wind turbine blade

Abstract

The invention discloses a preparation method of a rapid repairing coating for a wind turbine blade and belongs to the technical field of coatings. The rapid repairing coating has good water resistanceand acid resistance, alkali resistance, solvent resistance, chemical resistance and the like, has the advantages of favorable gloss, favorable wear resistance, higher hardness, high temperature resistance (200 DEG C), high flexibility, high impact resistance, high temperature change resistance, excellent interlayer adhesive force and other physical properties, and can be widely used for quick repair requirements of various wind power blades and coating and protection of ultrahigh-flexibility wind power blades.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of a wind power blade rapid repair coating. Background technique [0002] When it comes to wind power generation, what many people think of is the blue sea, white windmills, beautiful foothills, and neat lanes. However, the vast majority of wind farms are actually built in inaccessible areas, and the operating environment is harsh: my country Wind turbines are generally installed in high mountains, wastelands, Gobi, islands, etc., and are often affected by irregular, changing directions, variable load winds and strong gusts of wind. The wind turbines start and stop frequently and suffer large impacts. In addition, there is a large climate difference between the north and the south of my country, and the winter temperature in the north is low. For the low-temperature units in the north, in addition to meeting the mechanical performance requirements...

AI Technical Summary

Problems solved by technology

[0002] When it comes to wind power generation, what many people think of is the blue sea, white windmills, beautiful foothills, and clean driveways. However, most wind farms are actually built in inaccessible areas with harsh operating environments: my country Wind turbines are generally installed in high mountains, wastelands, Gobi, islands, etc., and are often affected by irregular, changing directions, variable load winds and strong gusts of wind.

In addition, there is a large climate difference between the north and the south of my country, and the winter temperature in the north is low. For the low-temperature units in the north, in addition to meeting the mechanical performance requirements at room temperature, the casting material must also ensure good impact toughness at low temperature -40°C. Wind turbines must have three defense measures to prevent salt spray, heat and humidity, and mold. They should also have a certain resistance to salt spray corrosion. The maintenance period of wind turbine blade equipment is long and the cost is high: wind turbine equipment is usually erected at a high place and it is inconvenient to maintain. There are very strict requirements on the quality, reliability and durability of repair coatings. The material of wind turbine blades should be light, so that the blades can be rotated more easily, and the efficiency of converting wind power into electrical energy will be greatly increased.

At the same time, wind power blade materials are required to withstand long-term sun and rain, wind, sand, ice and snow erosion, and also have high strength and fatigue resistance. Most of the wind farms in China are located in areas impacted by wind and sand. Polyurethane coatings can only adapt to the relatively good atmospheric environment. In China's wind farms, they can't resist the impact of wind and sand. They can only be used as a kind of decorative paint. They have no high practical value in areas impacted by sandstorms, as disclosed in Chinese patent application 200910075548.1 The composition and preparation method of "a hydroxyl resin composition and a solvent-free polyurethane putty containing the composition" are disclosed. (HDI) The polyisocyanate group (NCO) of the prepolymer reacts to form a network-like polyurethane joint filler; due to the low bond energy of the urethane bond in the polyurethane material, it results in low adhesion, poor weather resistance, and low impact resistance , Chinese patent application CN201210073434.5 discloses "a kind of putty for wind power blades and its preparation method". The glue time is short, it is difficult to apply on wind power blades, and the cost is high, and the price is expensive. However, most wind power blades use glass fiber reinforced epoxy resin, and the bonding ability of the paint is not strong. Those skilled in the art urgently need to develop a quick repair coating for wind power blades. Layer preparation methods to meet existing technical requirements and market demands

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