CN102181209A - Protective coating for wind wheel blade of wind generating set and preparation method thereof - Google Patents

Abstract

The invention relates to a wind turbine blade protective coating and a preparation method thereof. The invention belongs to a coating composition, in particular to a coating composition containing fluorine atoms based on a copolymer of a compound having multiple unsaturated aliphatic groups. It is characterized in that it includes component A and component B, component A: component B (mass ratio) = 100: 6 ~ 15, wherein component A is the main component, including the following raw material components in mass percentage: Fluorocarbon resin 45~75, pigment and filler 10~37, matting powder 2~4, dispersant 0.3~1, leveling agent 0.1~0.5, drier 0.01~0.2, defoamer 0.1~0.3, light stabilizer 0.5 ～1.5, wear-resistant additive 1～5, environment-friendly organic solvent 4.5～18.5; component B is a curing agent component, selected from aliphatic diisocyanate. Provided is a wind turbine blade protective coating with excellent ultraviolet aging resistance, abrasion resistance, stain resistance, corrosion resistance and strong adhesion, which meets the technical requirements of service life ≥ 20 years.

Description

A kind of protective coating for wind turbine blade of wind power generating set and preparation method thereof

technical field

The invention relates to a wind turbine blade protective coating and a preparation method thereof. The invention belongs to a coating composition, in particular to a coating composition containing fluorine atoms based on a copolymer of a compound having multiple unsaturated aliphatic groups.

technical background

The non-renewable petrochemical energy crisis has drawn global attention to the utilization of wind energy, an inexhaustible clean energy. my country has a large demand for wind power generation equipment. Wind rotor blades are one of the key core components of wind turbines, accounting for about 20% of the total equipment investment cost. Effectively controlling the manufacturing cost of wind rotor blades and prolonging their service life are one of the important ways to reduce the total cost of wind power generation. Wind power plants are mostly built in deserts, seas and coastal areas, where the environment is harsh, and the wind rotor blades are subjected to sandstone impact, sand erosion, strong ultraviolet radiation, large diurnal temperature impact, and acid and alkali erosion during operation. The technical index requirements for painting protective coatings on the surface of wind rotor blades are extremely stringent.

The environment faced by wind rotor blades is harsh, and in most cases it is impossible to redo the protective layer, so the requirements for the protection system are relatively strict. The ability of ultraviolet aging, resistance to wind and sand erosion, heat and humidity resistance and salt spray corrosion resistance can meet the needs of wind farms under different extreme climate conditions and ensure the design service life of wind turbine blades for 20 years.

The patent application with the publication number CN101613564A discloses "A Protective Coating for Wind Power Generation Blades and Its Preparation Method", which uses hydroxyacrylate resin as the base material for the surface protection coating of wind power generation blades, and uses HDI biuret and HDI trimer The mixture is used as a curing agent to prepare protective coatings for wind turbine blades. Acrylic resin coatings have the characteristics of light color, weather resistance, strong color and gloss retention, and good fullness of the paint film. However, acrylic resin has poor water resistance, solvent resistance, no abrasion resistance, and has the disadvantage of "hot stickiness, cold brittleness" . The above shortcomings limit its application in the field of wind power coatings.

The patent application with the publication number CN101665655A discloses a "preparation of high-performance wind power coating with organic fluorosilicon modified elastic polyurethane urea resin". The application uses polyester polyols, polyether diols, and amino-terminated fluorine-containing polysiloxanes to prepare fluorosilicon-modified polyurethane urea resin coatings, which have good performance. The production cost of polysiloxane and other raw materials is relatively high, and the source is insufficient, and the preparation process of the coating is complicated, and toxic xylene is used in its solvent.

At present, the protective coatings for wind rotor blades are mainly polyurethane resin coatings. Polyurethane resin has excellent low temperature resistance and high elasticity, wear resistance and corrosion resistance, but its ultraviolet radiation resistance and aging resistance are poor, and its service life is difficult to reach 20 years.

Fluorocarbon resin has excellent weather resistance, aging resistance, corrosion resistance, strong wear resistance and excellent adhesion, which can meet the requirements of protective coatings for wind turbine blades. The patent application with publication number CN101538434A discloses "a fluorocarbon topcoat for anticorrosion of wind power generation equipment and its preparation method" for the protection of wind power towers, but there is no use of two-component fluorocarbon coatings for wind rotor blade protection. Literature and patent coverage of coatings.

Contents of the invention

The technical problem to be solved by the present invention is: to overcome the deficiencies in the above-mentioned prior art, and to provide a product with excellent ultraviolet aging resistance, abrasion resistance, stain resistance, excellent corrosion resistance, good flexibility, and adhesion Strong protective coating for wind turbine blades of wind turbines, meeting the technical requirements of service life ≥ 20 years.

Another technical problem to be solved by the present invention is to provide a method for preparing a protective paint for wind turbine blades of a wind power generating set with low investment, simple operation process, low manufacturing cost and environmental protection.

The technical solution adopted by the present invention to solve its technical problems is:

Wind turbine blade protective coating for wind power generating set of the present invention comprises component A and component B, component A: component B (mass ratio)=100: 6～15, wherein

Component A is the main component, including the following raw material components in mass percent:

Component B is a curing agent component selected from aliphatic diisocyanates.

In the raw material component of the wind turbine blade protective coating for wind power generating set of the present invention, fluorocarbon resin is used as the main resin component, and an auxiliary agent and an environment-friendly organic solvent with good compatibility are screened; and an aliphatic diisocyanate with excellent performance is selected as the main resin component. Curing agent components. The performance of each component in the formula is coordinated, complemented and superimposed. Especially in the fluorocarbon resin structure, the ionic radius of the fluorine atom is small and the electronegativity is strong, which makes the bond energy of the fluorocarbon bond higher, which plays a vital role in improving various physical properties of the coating. It has successfully made up for the shortcomings of polyurethane resin coatings, such as poor ultraviolet radiation resistance and aging resistance, and the service life is difficult to reach 20 years. Thereby accomplished the task of the present invention.

In the protective coating for wind turbine blades of wind power generators of the present invention, the fluorocarbon resin is formed by copolymerization of tetrafluoroethylene and vinyl ester monomers, and its technical indicators are as follows: the hydroxyl value is 30-85 mgKOH/g, the acid value is 0～15mgKOH/g, fluorine content≥20%, solid content≥50%. It is an optimal technical solution.

In the protective coating for wind rotor blades of a wind power generating set of the present invention, the curing agent is HDI (hexamethylene diisocyanate) trimer. It is a preferred technical solution disclosed by the inventor.

In the wind turbine blade protective coating of the present invention, the dispersant is a polymer carboxylic acid dispersant; the leveling agent is an acrylic leveling agent; and the drier is an organotin type drier ; The defoamer is a silicone-free macromolecule defoamer; the light stabilizer is a benzophenone ultraviolet absorber and/or a nano-zinc oxide light stabilizer; the wear-resistant additive is a nano Al ₂ O ₃ /SiO ₂ composite wear-resistant powder or VS-SP glass powder; the matting powder is silica-based matting powder.

In the protective coating for wind turbine blades of wind power generating sets of the present invention, the pigment and filler are selected from rutile titanium dioxide, barium sulfate, mica powder, silicon micropowder, carbon black, and scarlet pigment, or any combination of two or more thereof .

In the protective coating for wind turbine blades of a wind power generating set of the present invention, the environmentally friendly organic solvent is one selected from butyl acetate, dimethyl carbonate, DBE, and propylene glycol methyl ether acetate, or any combination of two or more thereof.

Provide a kind of preparation method of wind turbine blade protective coating of wind power generating set of the present invention below, it is characterized in that comprising the following steps:

①. Preparation of Component A

According to the proposed formula, put three-quarters of the fluorocarbon resin, dispersant, pigments and fillers, matting powder, wear-resistant additives, light stabilizers, and environmentally friendly organic solvents into the reactor with stirring, disperse evenly, and then use After being ground by a sand mill, add the remaining additives and 1/4 of the remaining formula amount of fluorocarbon resin, disperse evenly at high speed, and discharge the material to obtain component A;

②. Directly use commercially available HDI trimer as component B;

③.Preparation of protective coatings for wind turbine blades

Before use, according to the ratio of component A: component B (mass ratio) = 100:6~15, mix A and B evenly, add an appropriate amount of environmentally friendly solvent to adjust the appropriate viscosity, and then use it for spraying, roller coating, and brushing .

Compared with the prior art, the disclosed technical solution of the protective coating for wind turbine blades of wind power generating set and its preparation method has the following positive effects:

1. Provide a protective coating for wind turbine blades with excellent UV aging resistance, abrasion resistance, stain resistance, excellent corrosion resistance, good flexibility and strong adhesion, meeting the service life of ≥20 years technical requirements.

2. Provide a method for preparing a protective coating for wind turbine blades of a wind power generating set with low investment, simple and convenient operation process, low manufacturing cost and environmental protection.

3. It has excellent wear resistance and impact resistance, and can resist gas erosion and sand and stone impact.

4. It has excellent chemical stability and can resist acid and alkali corrosion.

5. It has good non-stick and anti-fouling properties, which can improve the self-cleaning performance of the wind rotor blades and reduce the wind resistance of the wind rotor blades.

6. The paint film has strong resistance to dry-wet cycle and cold-heat cycle, and can be used normally in an environment with frequent alternating between dry-wet and cold-heat. Has excellent electrical insulation properties.

7. The coating product of the present invention does not use toxic solvents such as xylene during production and use, and has better environmental performance.

Detailed ways

The present invention will be described in further detail below in conjunction with embodiment:

Example 1

Prepare the white wind turbine blade protective paint of the present invention according to the following steps

①. Preparation of Component A

Including the following raw material components in mass percentage:

According to the proposed formula, put three-quarters of the fluorocarbon resin, dispersant, pigments and fillers, matting powder, wear-resistant additives, light stabilizers, and environmentally friendly organic solvents into the reactor with stirring, disperse evenly, and then use After grinding by a sand mill, add leveling agent, drier and 1/4 fluorocarbon resin of the remaining formula, disperse evenly at high speed, and discharge to obtain component A;

②. Directly use commercially available HDI trimer as component B;

③.Preparation of protective coating for wind turbine blades

Before use, weigh and mix 100 parts by weight of component A prepared above with 6 parts by weight of commercially available HDI trimer, add an appropriate amount of 60 parts by weight of an environmentally friendly solvent, adjust the viscosity, and use it for spraying, roller coating, and brushing.

Embodiment 2 to Embodiment 5

According to the method and steps of Example 1, according to the formula in Table 1, the wind turbine blade protective coating of the present invention was prepared.

Table 1:

The above-mentioned embodiment 1～embodiment 5 is sprayed and manufactured with the protective paint of the wind turbine blade of the wind power generating set, and the performance test has been carried out, and the data are listed in Table 2

Table 2:

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (7)

1. a wind turbine blade protective coating for wind power generators, characterized in that it comprises component A and component B, component A: component B (mass ratio)=100: 6～15, wherein Component A is the main component, including the following raw material components in mass percent: Component B is a curing agent component selected from aliphatic diisocyanates. 2. according to claim 1, the protective coating for wind turbine blades of wind power generators is characterized in that said fluorocarbon resin is formed by copolymerization of tetrafluoroethylene and vinyl ester monomers, and its technical index is as follows: the hydroxyl value is 30～ 85mgKOH/g, acid value 0-15mgKOH/g, fluorine content ≥ 20%, solid content ≥ 50%. 3. The protective coating for wind turbine blades of wind power generators according to claim 1, characterized in that the curing agent is HDI (hexamethylene diisocyanate) trimer. 4. according to claim 1 wind turbine blade protective coating of wind power generating set, it is characterized in that said dispersant is macromolecule carboxylic acid dispersant; Described leveling agent is acrylic acid ester leveling agent; Described drier It is an organotin type drier; the defoamer is a silicone-free polymer type defoamer; the light stabilizer is a benzophenone ultraviolet absorber and/or a nano zinc oxide light stabilizer; The wear-resistant additive is nano-Al ₂ O ₃ /SiO ₂ composite wear-resistant powder or VS-SP glass powder; the matting powder is silica-based matting powder. 5. according to claim 1 wind turbine blade protective coating of wind power generating set, it is characterized in that said pigment and filler is a kind of selected from rutile type titanium dioxide, barium sulfate, mica powder, silicon micropowder, carbon black, scarlet pigment or any combination of two or more thereof. 6. according to the protective paint of wind turbine blade of wind power generator set according to claim 1, it is characterized in that said environment-friendly organic solvent is a kind of selected from butyl acetate, dimethyl carbonate, DBE, propylene glycol methyl ether acetate or its Any combination of two or more. 7. a preparation method of claim 1 wind turbine blade protective coating for wind power generating set, is characterized in that comprising the following steps: ①. Preparation of Component A According to the proposed formula, put three-quarters of the fluorocarbon resin, dispersant, pigments and fillers, matting powder, wear-resistant additives, light stabilizers, and environmentally friendly organic solvents into the reactor with stirring, disperse evenly, and then use After being ground by a sand mill, add the remaining additives and 1/4 of the remaining formula amount of fluorocarbon resin, disperse evenly at high speed, and discharge the material to obtain component A; ②. Directly use commercially available HDI trimer as component B; ③.Preparation of protective coatings for wind turbine blades Before use, according to the ratio of component A: component B (mass ratio) = 100:6~15, mix A and B evenly, add an appropriate amount of environmentally friendly solvent to adjust the appropriate viscosity, and then use it for spraying, roller coating, and brushing .