CN113698858A - Water-based wind power blade and bottom surface integrated coating and preparation method thereof - Google Patents
Water-based wind power blade and bottom surface integrated coating and preparation method thereof Download PDFInfo
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- CN113698858A CN113698858A CN202110811887.2A CN202110811887A CN113698858A CN 113698858 A CN113698858 A CN 113698858A CN 202110811887 A CN202110811887 A CN 202110811887A CN 113698858 A CN113698858 A CN 113698858A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a water-based primer-topcoat coating for wind power blades and a preparation method thereof, and the water-based primer-topcoat coating comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight: 55-65% of acrylic acid modified aqueous dispersion type polyol resin emulsion; 15 to 25 percent of inorganic pigment and filler; 14-16.5% of deionized water; 3.5 to 6 percent of auxiliary agent; the component B is 100 percent of modified polyisocyanate; before coating, uniformly mixing the component A and the component B according to the ratio of 5:1, and using after full reaction; the coating disclosed by the invention has excellent performances in saline-alkali resistance, weather resistance, wear resistance, low-temperature freeze thawing resistance and the like, has good film forming performance, belongs to a pure water environment-friendly product bottom surface two-in-one coating, is green and environment-friendly, is convenient and fast to construct, reduces construction links, and reduces construction and maintainable costs; the invention can be applied to the protective coating of the middle and rear sections of the coastal or offshore wind power generation blade.
Description
Technical Field
The invention relates to the technical field of wind power coatings, in particular to a two-component water-based coating for bottom surfaces of wind power blades and a preparation method thereof.
Background
With the vigorous development of the wind power industry in China, the demand and the use amount of the high-performance and high-corrosion-resistance wind power blade coating are increased. The blade is one of the most basic and key components in the wind power generation device, and the glass fiber reinforced plastic composite material is selected as the blade material in a large range in the actual market at present, and is mainly reinforced plastic made by permeating plastics such as epoxy resin, unsaturated resin and the like into glass fibers or carbon fibers with different lengths. However, the reinforced composite material based on epoxy glass is susceptible to chemical corrosion, natural aging and the like in working environments such as wind, sun, ultraviolet aging, coastal high salt spray corrosion, chemical pollution, high temperature, high humidity, rain erosion resistance and the like, so that the blades gradually lose the physicochemical properties of the original material. Therefore, the surface layer of the wind turbine blade is usually protected by painting.
The wind power blade coating not only needs to have long-acting weather resistance, high corrosion resistance and other performances, but also meets the requirements of the working environment on the material performances of the coating, such as wear resistance, impact resistance, flexibility, low-temperature freezing resistance and the like. Therefore, the blade can be effectively protected from having a smooth surface for a long time so as to improve the wind energy conversion rate.
In recent years, wind power blade coating technology is continuously innovated, and new technology and new products are continuously emerged. However, the solvent type wind power blade coating is still used as the main material in the market at present, and a large amount of volatile solvent can be released in the construction process and after the construction, so that the environment is polluted, the ecology is influenced, and potential safety hazards exist. The method is not consistent with the environmental protection property of wind power generation which is famous for clean energy, and is contrary to the energy conservation and emission reduction in China. Although some enterprises begin to use environment-friendly wind power coatings, the coating systems are still formed by a coating scheme of primer and finish, and the problems still exist in the aspects of coating cost, construction period, convenience and maintainability and the like.
Therefore, the development of the wind power blade coating which is environment-friendly, economical and convenient in construction and maintenance and capable of effectively protecting the blade from having a smooth surface for a long time so as to improve the wind energy conversion rate is required by the market.
Disclosure of Invention
The invention aims to provide a water-based primer-topcoat coating for a wind turbine blade, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme.
A water-based primer-topcoat coating for wind turbine blades comprises a component A and a component B,
the component A comprises the following components: 25-30% of aqueous polyester polyol resin dispersoid; 30 to 35 percent of fluorine-containing polyhydroxy polyacrylic resin emulsion; 1% -2% of a dispersant; 0.2 to 0.4 percent of defoaming agent; 0.2 to 0.4 percent of wetting agent; 0.2 to 0.4 percent of rheological additive; 0.3 to 0.5 percent of light stabilizer; 0.2 to 0.4 percent of pH value regulator; 0.2 to 0.5 percent of thickening agent; 15% -18% of titanium dioxide; 5 to 6 percent of mica powder; 2% -5% of hollow glass beads; 14-16.5% of dispersion medium water;
the component B comprises the following components: 100% of modified polyisocyanate.
The two components are uniformly and fully mixed and reacted according to the proportion of (4-6) to (1-2) before coating, and then the coating is used.
Preferably, the modified polyisocyanate is a silicone-polyol ether modified polyisocyanate.
The coating is obtained by fully mixing and reacting the component A and the component B. The water dispersible poly-silicon-polyol ether modified polyisocyanate in the component B and the acrylic resin containing the rigid chain segment and the polyhydroxy group in the component A form a compact network structure through chemical crosslinking reaction; and then endowing the paint with the required physical and chemical properties through the preferable proportion of the auxiliary agent and the pigment filler.
Wherein: A. the B component skeleton can form a compact reticular structure protective layer through chemical crosslinking reaction, and a synergistic barrier and corrosion prevention function of pigments and fillers (such as mica powder, glass bead powder and the like) is added, so that a system barrier and corrosion prevention protective wrapping layer is formed on a substrate (the coating has a general primer function), and meanwhile, under the common reaction action of a flexible chain segment, a fluorine-containing polyhydroxy group, a Si-O bond and other functional auxiliaries (such as a light stabilizer, glass bead powder and the like) in the skeleton, the surface of the coating is more smooth and smooth (the glossiness of the coating is improved), and the coating has the function protection performance which is possessed by common finish paint, such as long-term weather resistance, temperature change resistance and the like.
The coating provided by the invention can integrate the bottom surface and the surface, and the product not only has good mechanical properties (necessary properties of the primer) such as adhesion, flexibility and the like on a wind turbine blade substrate, but also has excellent weather resistance, corrosion resistance and wear resistance (the finish has properties).
Preferably, the dispersant is a sodium polycarboxylate dispersant.
Preferably, the defoaming agent is a silicon-containing high molecular polymer defoaming agent, such as BYK-028.
Preferably, the wetting agent is an alkyl ethoxy ether-based wetting agent.
Preferably, the rheology aid is a modified polyurea rheology agent.
Preferably, the light stabilizer is a high molecular hindered ammonium light stabilizer.
Preferably, the pH regulator is an ammonium salt pH regulator.
Preferably, the thickener is an alkali-swellable associative thickener, such as ASE-60.
Preferably, the titanium dioxide is rutile type titanium dioxide.
Preferably, the mica powder is sericite powder.
Preferably, the hollow glass beads are silica-alumina-based hollow glass bead powder.
The hollow glass bead powder of the invention has the following functions: (1) the fluidity of the coating can be effectively enhanced; (2) the coating can provide effective heat insulation and heat preservation protection functions (the high mountain or offshore wind power platform needs to withstand the temperature environment with large temperature difference between day and night); (3) filling and whitening, and improving luster; (4) the temperature resistance and the wear resistance of the coating are improved to a certain extent.
Preferably, the dispersion medium water is deionized water.
The invention also aims to provide a preparation method of the waterborne wind power blade primer-topcoat coating, which adopts the technical scheme that the preparation of the component A comprises the following steps:
(1) respectively adding water, a dispersing agent, a defoaming agent, a wetting agent, a rheological agent and a light stabilizer, dispersing for 10-15 min at the speed of 600-800 rpm by using stirring equipment, and fully stirring and uniformly mixing;
(2) adjusting the stirring speed of (1) to 200-400 rpm, respectively putting titanium dioxide, mica powder and hollow glass beads into (1), increasing the stirring speed to 800-1200 rpm for pulping, and fully dispersing for 10-20 min;
(3) putting the slurry obtained in the step (1) into a sand mill, and grinding until the fineness is less than or equal to 20um to obtain paint slurry;
(4) respectively putting the aqueous polyester polyol resin dispersoid and the fluorine-containing polyhydroxy polyacrylic acid resin emulsion into a dispersion cylinder, fully dispersing for 10-15 min under the action of a stirring speed of 600-800 rpm, then sequentially putting a pH regulator, deionized water, a wetting agent and a defoaming agent, and fully dispersing for 10-15 min to uniformly mix;
(5) reducing the stirring speed to 200-400 rpm, slowly adding the slurry ground in the step (3) into the step (4), and increasing the stirring speed to 600-800 rpm for mixing for 10-20 min until the slurry is uniformly dispersed;
(6) and (3) adding a thickening agent into the mixed material obtained in the step (5), dispersing for 15-20 min at a shear rate of 600-800 rpm, and adjusting the viscosity of the coating to a proper value, so as to obtain the component A coating.
The third purpose of the invention is to provide the application of the coating on the coastal or offshore wind power generation blade, wherein the component A and the component B are uniformly mixed and fully reacted, and then the component A and the component B are coated on the wind power blade to form an anticorrosive protective gel coat layer.
Preferably, the base material of the wind power blade is glass fiber reinforced plastic.
Through the technical scheme, the invention has the following beneficial effects:
the water-based primer-topcoat coating for the wind power blade provided by the invention is high in curing rate and good in one-time film forming thickness, the surface can be quickly sprayed for 2 times after being dried, and the thickness of a dry film can reach more than 250 micrometers; the chemical medium performances of acid resistance, salt resistance and alkali resistance are excellent, and particularly, the salt spray resistance and the artificial aging resistance are both over 3000 hours and far higher than those of similar products in the market; the wear-resistant, impact-resistant and flexible blade is excellent in performance and provides long-acting protection for the blade. Meanwhile, the bottom surface is integrated, the construction is cheap, the intermediate coating process is reduced, the construction period is shortened, the labor cost is reduced, the maintainability is high, and the actual requirements of the middle-rear section working environment of the wind power blade are completely met.
Detailed Description
The present invention will be further described with reference to the following examples. The scope of protection of the patent is not limited to the specific embodiments.
In the following examples 1-3:
the waterborne polyester polyol resin dispersoid is purchased from Beijing Baiyuan BY3301, is a copolymer of polycarboxylic acid and polyol, has 50 percent of solid content and a hydroxyl value of 110-125 mg KOH/g, and is cosolvent butyl glycol ether;
the fluorine-containing polyhydroxy polyacrylic acid emulsion is purchased from JELEE WA-128A, is fluorine-based graft modified acrylic acid and polyhydroxy acrylic acid copolymer emulsion, and has the solid content of 50 percent;
the sodium polycarboxylate dispersant is SN-5040, the silicon-containing high-molecular polymer defoamer is BYK-028, the alkyl ethoxy ether wetting agent is Sinpols X4005, the polyether modified polydimethylsiloxane substrate wetting agent is BYK-333, the modified polyurea rheological agent is BYK-425, the high-molecular hindered ammonium light stabilizer is Rianlon UV384-2, the ammonium salt pH regulator is AMP-95, the alkali swelling association type thickener is ASE-60, and the silicon-aluminum-based hollow glass beads are superfine aluminum silicate hollow glass beads;
hydrophilic HDI polyisocyanate available from coxiela Bayhydur XP 2655;
it will be understood by those skilled in the art that any other reagent having the same chemical composition as the above-mentioned commercially available reagent, or a reagent having the same chemical composition synthesized by itself, may be used to implement the present invention without being limited to the above-mentioned company and product brands.
Example 1
The water-based primer-topcoat coating for the wind power blade comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight:
the component B comprises the following components:
and 100% of hydrophilic HDI polyisocyanate.
The preparation method of the component A of the coating comprises the following steps:
(1) respectively adding deionized water, a sodium polycarboxylate dispersant, a silicon-containing high molecular polymer defoaming agent, an alkyl ethoxy ether wetting agent, a modified polyurea rheological agent and a high molecular hindered ammonium light stabilizer, dispersing for 10min at a medium speed of 600rpm by using stirring equipment, and fully stirring and uniformly mixing;
(2) adjusting the stirring speed of the step (1) to 300rpm at a low speed, respectively putting rutile titanium dioxide, sericite powder and silica-alumina-based hollow glass beads into the step (1), increasing the stirring speed to 1000rpm for pulping, and fully dispersing for 15 min;
(3) putting the slurry obtained in the step (1) into a sand mill, and grinding until the fineness is less than or equal to 20um to obtain paint slurry;
(4) respectively putting the aqueous polyester polyol dispersoid and the fluorine-containing polyhydroxy polyacrylic acid emulsion into a dispersion cylinder, fully dispersing for 10min under the action of the stirring speed of 700rpm, then sequentially putting an ammonium salt type pH regulator, deionized water, a polyether modified polydimethylsiloxane substrate wetting agent and a silicon-containing high molecular polymer defoaming agent BYK-028, fully dispersing for 10min until the mixture is uniformly mixed, and testing the pH value of the mixed solution to be 9;
(5) reducing the stirring speed to 300rpm, slowly adding the slurry ground in the step (3) into the step (4), and increasing the stirring speed to 700rpm for mixing for 15min until the slurry is uniformly dispersed;
(6) and (3) putting the alkali swelling association type thickener ASE-60 into the mixed material in the step (5), dispersing for 15min at a medium-speed shear rate of 600rpm, and adjusting the viscosity of the coating to be proper, thereby obtaining the component A coating.
The raw materials of the component A and the component B are uniformly and fully mixed in a mass ratio of 5:1 before coating, and are used after full reaction.
Two coats were applied, the dry film thickness being 260. mu.m.
Example 2
A water-based primer-topcoat coating for wind turbine blades comprises a component A and a component B, wherein the component A comprises:
the component A comprises the following raw materials in parts by weight:
the component B comprises the following components:
100 percent of poly-silicon-polyol ether modified polyisocyanate.
The two-component raw materials are uniformly and fully mixed and reacted according to the proportion of 4-6: 1-2 before coating, and then are used.
The preparation method of the coating has the same specific steps as example 1.
The application of the coating was the same as in example 1.
Example 3
A water-based primer-topcoat coating for wind turbine blades comprises a component A and a component B, wherein the component A comprises:
the component A comprises the following raw materials in parts by weight:
the component B comprises the following components:
100 percent of poly-silicon-polyol ether modified polyisocyanate.
The two-component raw materials are uniformly and fully mixed and reacted according to the proportion of 4-6: 1-2 before coating, and then are used.
The preparation method and application of the coating are the same as those of example 1.
The kinds and the manufacturer numbers of the raw materials used in the above examples 2 and 3 were the same as those of example 1.
The water-based wind power blade primer-topcoat coating prepared in the embodiments 1 to 3 is subjected to plate making and film coating, plates are made in a spraying mode uniformly (the dry film thickness is not less than 250 micrometers), the prepared coating layers of the embodiments are detected and compared with related products on the market (a wind power blade coating of a primer and finish scheme), and the detection and comparison results are shown in table 1.
TABLE 1 comparison of the results of the film coating performance tests of examples 1 to 3
As can be seen from the test result records in the table 1, the waterborne wind turbine blade and primer-topcoat integrated coating prepared by mixing the components in the embodiments 1 to 3 in a proper proportion has excellent performances, and particularly has more excellent comprehensive performances in the aspects of salt spray resistance, artificial accelerated aging resistance, adhesive force, chemical corrosion resistance and the like compared with the comparison 1 and the comparison 2 (products sold in the market at present).
It should be noted that the thickness of the coating layer of the wind power blade coating has a certain influence on the related performance, the coating thickness (used in the middle and rear sections of the blade) of the primer and finish products on the market at present is at least more than 200um, the coating thickness used in the tip end coating of the blade is often more than 300um, which is related to the actual working and running of the wind power blade, the coating layer is related to various media (such as rain erosion, wind erosion, sand erosion, sea water/salt fog erosion, particle matter impact abrasion and the like) in the natural environment, in order to better protect the base material of the blade and to prolong the service life of the coating layer, the coating thickness reaches more than 250um in the middle and rear sections, so the actual service performance of the coating layer is better guaranteed, the blade tip end is more so, meanwhile, the coating thickness is not as thick as possible, the blade bearing is correspondingly increased due to excessive thickness, the wind power with different sizes and grades cannot be better utilized to run the blade for power generation in the wind power generation industry, the wind power blade has relevant current standards when being designed and manufactured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a water-based coating for bottom-face integration of wind power blades, which is characterized in that: the coating consists of a component A and a component B, wherein,
the component A comprises the following raw materials in percentage by mass:
25-30% of aqueous polyester polyol resin dispersoid, 30-35% of fluorine-containing polyhydroxy polyacrylic acid emulsion, 1-2% of dispersant, 0.2-0.4% of defoaming agent, 0.2-0.4% of wetting agent, 0.2-0.4% of rheological additive, 0.3-0.5% of light stabilizer, 0.2-0.4% of pH value regulator, 0.2-0.5% of thickening agent, 15-18% of titanium pigment, 5-6% of mica powder and 2-5% of hollow glass bead; 14-16.5% of water;
the component B comprises the following raw materials: 100% of modified polyisocyanate;
the component A and the component B are uniformly mixed according to the mass ratio of (4-6) to (1-2) before coating, and are used after reaction.
2. The water-based paint for the bottom surface of the wind turbine blade as claimed in claim 1, wherein the dispersant in the component A is a sodium polycarboxylate dispersant, the defoamer is a silicon-containing high molecular polymer defoamer, the wetting agent is an alkyl ethoxy ether wetting agent, the rheological additive is a modified polyurea rheological agent, the light stabilizer is a high molecular hindered ammonium light stabilizer, the pH regulator is an ammonium salt pH regulator, the thickener is an alkali swelling association type thickener, titanium dioxide is rutile titanium dioxide, mica powder is sericite powder, inorganic hollow microspheres are silica-alumina-based hollow glass microspheres, and water is deionized water.
3. The waterborne wind power blade bottom-coating composition according to claim 1, wherein the component B modified polyisocyanate is a silicone-polyol ether modified polyisocyanate.
4. The preparation method of the water-based primer-topcoat coating for the wind power blade, which is described in any one of claims 1 to 3, is characterized by comprising the following steps: the preparation method of the component A comprises the following steps:
(1) respectively adding water, a dispersing agent, a defoaming agent, a wetting agent, a rheological agent and a light stabilizer, dispersing for 10-15 min at the speed of 600-800 rpm by using stirring equipment, and fully stirring and uniformly mixing;
(2) adjusting the stirring speed of (1) to 200-400 rpm, respectively putting titanium dioxide, mica powder and hollow glass beads into (1), increasing the stirring speed to 800-1200 rpm for pulping, and fully dispersing for 10-20 min;
(3) putting the slurry obtained in the step (1) into a sand mill, and grinding until the fineness is less than or equal to 20um to obtain paint slurry;
(4) respectively putting the aqueous polyester polyol resin dispersoid and the fluorine-containing polyhydroxy polyacrylic acid emulsion into a dispersion cylinder, fully dispersing for 10-15 min under the action of a stirring speed of 600-800 rpm, then sequentially putting a pH regulator, deionized water, a wetting agent and a defoaming agent, and fully dispersing for 10-15 min to uniformly mix;
(5) reducing the stirring speed to 200-400 rpm, slowly adding the slurry ground in the step (3) into the step (4), and increasing the stirring speed to 600-800 rpm for mixing for 10-20 min until the slurry is uniformly dispersed;
(6) and (3) adding a thickening agent into the mixed material obtained in the step (5), dispersing for 15-20 min at a shear rate of 600-800 rpm, and adjusting the viscosity of the coating to a proper value, so as to obtain the component A coating.
5. Use of the water-based primer-topcoat coating for wind turbine blades on coastal or offshore wind power generation according to any one of claims 1 to 3, wherein the primer-topcoat coating comprises: the component A and the component B are uniformly mixed and fully reacted, and then the mixture is coated on the wind power blade to form an anticorrosive protective gel coat layer.
6. Use according to claim 5, characterized in that: the base material of the wind power blade is glass fiber reinforced plastic.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110811887.2A CN113698858A (en) | 2021-07-19 | 2021-07-19 | Water-based wind power blade and bottom surface integrated coating and preparation method thereof |
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| CN202110811887.2A CN113698858A (en) | 2021-07-19 | 2021-07-19 | Water-based wind power blade and bottom surface integrated coating and preparation method thereof |
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| CN111961402A (en) * | 2020-08-31 | 2020-11-20 | 东莞大宝化工制品有限公司 | Water-based double-component high-gloss white finish paint and preparation method and application method thereof |
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2021
- 2021-07-19 CN CN202110811887.2A patent/CN113698858A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04331275A (en) * | 1990-08-10 | 1992-11-19 | Bayer Ag | Two-component coating composition for automobile repair lacquer |
| CN102120913A (en) * | 2011-04-12 | 2011-07-13 | 北京虹霞正升涂料有限责任公司 | Water-based polyurethane paint for protecting windmill generator blade |
| CN102796446A (en) * | 2012-08-10 | 2012-11-28 | 中山大桥化工企业集团中山智亨实业发展有限公司 | Anti-sandstorm special blade paint |
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Application publication date: 20211126 |