CN114854292A - Bi-component coating special for repairing wind power blade surface coating - Google Patents
Bi-component coating special for repairing wind power blade surface coating Download PDFInfo
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- CN114854292A CN114854292A CN202210673994.8A CN202210673994A CN114854292A CN 114854292 A CN114854292 A CN 114854292A CN 202210673994 A CN202210673994 A CN 202210673994A CN 114854292 A CN114854292 A CN 114854292A
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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
- C09D175/02—Polyureas
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/325—Polyamines containing secondary or tertiary amino groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6648—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6651—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention discloses a two-component coating special for repairing a surface coating of a wind power blade, and belongs to the technical field of coating chemical industry. The coating consists of a component A and a component B, wherein the component A comprises the following components in percentage by mass: 30-50% of aliphatic polyisocyanate resin, 15-25% of solvent, 10-50% of pigment and/or filler and the balance of auxiliary agent; the component B comprises the following components in percentage by mass: 70-100% of polyaspartic acid ester resin and 0-30% of polycarbonate polyol; the aliphatic polyisocyanate resin comprises the following components in percentage by mass: 0-15% of aliphatic isocyanate tripolymer and 85-100% of aliphatic diisocyanate-polyol prepolymer; the component A and the component B are respectively packaged by adopting a double-component aerosol spray can. The coating has the advantages of convenience in carrying and simplicity and convenience in construction, spraying construction can be quickly completed after mixing, the coating is not influenced by construction time limit, and the problem of repairing of the surface coating of the wind power blade is solved.
Description
Technical Field
The invention belongs to the technical field of coating chemical industry, and particularly relates to a special bi-component coating for repairing a surface coating of a wind power blade.
Background
With the increasing global environmental destruction and climate warming problems, clean energy technologies are being vigorously developed in all countries of the world. Wind power generation has received increasing attention in recent years as an important renewable energy technology. Wind power generation is a technology for converting natural wind energy into electric energy, and the power generation process does not consume any fossil fuel and does not generate any waste damaging the environment, so that the wind power generation is one of the cleanest energy manufacturing technologies discovered at present.
The wind power blade is an important part of the wind driven generator and is used for driving the generator to operate along with the rotation of wind power. The outer surface of the wind power blade is generally made of epoxy resin-glass fiber composite material (commonly called glass fiber reinforced plastic), which has the advantages of high strength, light weight, good tensile property and the like, but the material also has the defects of impact resistance, ultraviolet light resistance and the like. Wind power generators are generally installed in areas with rich wind energy resources, such as the northwest gobi area of China, high mountains in the central China and the southeast coastal areas, the operating environments of the areas are severe, and wind power blades need to bear the impact of extremely serious sand dust, rainwater, hail, salt fog, insects and the like when running at high speed, and are usually most seriously corroded particularly at the front edge parts of the blade tips. Therefore, a layer of protective material is coated on the surface of the blade to avoid corrosion, and when the protective material layer is damaged, the protective material layer needs to be repaired in time to prevent corrosion from generating and expanding.
The existing protective materials mainly comprise two types of elastic films and two-component coatings. The elastic film is mainly imported, and is mostly made of thermoplastic polyurethane and polyurea materials. Such materials are expensive, complex in the pasting process, high in requirement for the surface flatness of the base material, and need to be peeled off and repaired after being damaged, so that the use economy and the workability are poor.
The main types of the two-component coating are epoxy, polyurethane and the like, and a polyurea coating system applied to the front edge part is also provided. The curing speed of the two-component coating is slow, and multiple construction is needed to reach the dry film thickness with qualified performance. When the protective material layer needs to be repaired, the same two-component coating as that used in production is usually adopted in the past, and the drying time is relatively long, so that the process is complex, the efficiency is low, and the coating is polluted by more sand and dust in the drying process to influence the combination between the coatings.
To solve this problem, the skilled person has developed two-component polyurea coatings with aspartate and isocyanate as the AB component. For example, Chinese patent 2013106843798, published as 5/7/2014, discloses a quick-drying finish for repairing wind turbine blades, which is prepared by combining a coating part and a curing agent part; wherein the coating part comprises the following components in parts by weight: 30-60 parts of polyaspartic acid ester resin, 15-35 parts of pigment, 1-5 parts of anti-settling agent, 0.5-3 parts of dispersing agent, 1-3 parts of defoaming agent, 0.2-2 parts of flatting agent, 2-4 parts of light stabilizer, 1-3 parts of ultraviolet absorber, 3-8 parts of matting powder, 2-5 parts of high wear-resistant agent and 5-20 parts of organic solvent; the curing agent part consists of curing agent IPDI or HDI tripolymer and organic solvent. The coating has high reaction speed and improved construction efficiency, but in practical application, a period of time is required from the completion of the preparation of the coating to the climbing to a high-altitude construction point, and if the coating is adopted for repair, the coating is often gelled before being used.
Therefore, the coating repair problem of the wind power blade is still a big pain point in the industry and needs to be solved urgently.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a two-component spray paint special for repairing a surface coating of a wind power blade.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the two-component coating special for repairing the surface coating of the wind power blade comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 30-50% of aliphatic polyisocyanate resin, 15-25% of solvent, 10-50% of pigment and/or filler and the balance of auxiliary agent; the component B comprises the following components in percentage by mass: 70-100% of polyaspartic acid ester resin and 0-30% of polycarbonate polyol;
the aliphatic polyisocyanate resin comprises the following components in percentage by mass: 0-15% of aliphatic isocyanate tripolymer and 85-100% of aliphatic diisocyanate-polyol prepolymer;
the component A and the component B are respectively packaged by adopting a double-component aerosol spray can.
Further, the auxiliary agent comprises the following components in percentage by mass: 1-3 parts of rheological additive, 0.5-1.5 parts of ultraviolet light stabilizing additive, 0.5-1.5 parts of wetting dispersant, 1-3 parts of defoaming agent, 0.5-1.5 parts of flatting agent and 1-5 parts of water removing agent.
Further, the aliphatic isocyanate trimer is hexamethylene diisocyanate trimer, isophorone diisocyanate trimer or 4,4' -dicyclohexylmethane diisocyanate trimer.
Further, the aliphatic diisocyanate-polyol prepolymer is a prepolymer of hexamethylene diisocyanate, isophorone diisocyanate or 4,4' -dicyclohexylmethane diisocyanate and polyester or polyether polyol.
Further, the solvent is xylene, butyl acetate or propylene glycol methyl ether acetate.
Further, the preparation method of the aliphatic polyisocyanate resin comprises the following steps: the aliphatic isocyanate tripolymer and the aliphatic diisocyanate-polyalcohol prepolymer are evenly stirred at medium speed and are filled with inert gas for protection.
Further, the polyaspartate resin is tetraethyl R-bisaspartate, wherein R is 2-methyl-1, 5-pentanediyl, 4,4 '-dicyclohexylmethylene, 4,4' -dimethylcyclohexylmethylene, iso (2,4,4 '-trimethyl) cyclohexylethylene or 1,4' -cyclohexyl.
Further, the polycarbonate polyol is hydroxyl polycarbonate polyol resin generated by the reaction of ethyl carbonate and dihydric alcohol under phosgene.
Further, the proportion of the component A to the component B is determined according to the molar ratio of the sum of-NH and-OH to-NCO being 1 (1-1.2).
Further, the preparation method comprises the following steps:
(1) preparation of component A
1.1 premixing aliphatic polyisocyanate resin, rheological additive and organic solvent accounting for 50-80% of all solvents;
1.2 adding a wetting dispersant and a defoaming agent under the stirring state, and uniformly mixing;
1.3 under the stirring state, adding pigment and/or filler and water removing agent, dispersing and grinding until the fineness is less than or equal to 20 micrometers;
1.4 adding the flatting agent, the ultraviolet light stabilizing auxiliary agent and the rest of the organic solvent in a stirring state, and uniformly stirring to obtain a component A;
(2) preparation of component B
Uniformly stirring and mixing the polyaspartic ester resin and the polycarbonate polyol to obtain a component B;
(3) sealing the component A and the component B in a bi-component aerosol spray can to obtain a finished product.
Compared with the prior art, the invention adopts a bi-component spray can form, the component A and the component B can be filled with liquid, and the component A and the component B have better uniformity and stability and are convenient to carry; meanwhile, after the component A and the component B are mixed, spraying construction can be quickly finished, construction is simple and convenient, the influence of construction time limit is avoided, and the problem of repairing the wind power blade is solved; the obtained coating has the characteristics of full appearance color, high adhesion, good impact resistance, high flexibility, good tensile resistance and excellent rain erosion resistance, is resistant to ultraviolet light aging, acid, alkali and salt mist, has excellent freezing resistance, and is very suitable for repairing the wind power blade.
Detailed Description
The invention is further described with reference to specific examples.
The raw materials used in the examples were as follows:
the polyester polyols herein may be conventional polyester polyols, polycaprolactone polyols, and polycarbonate diols.
In each example, polycarbonate diol is used as the polycarbonate polyol.
The rheological aid can be at least one of organic modified bentonite, polyamide wax and fumed silica, and in the following examples, organic modified bentonite Bentonie 52 is used as the rheological aid.
The wetting dispersant may be at least one selected from DISPERBYK 163, DISPERBYK 110 and DISPERBYK 180 from dick chemical company, and DISPERBYK 163 may be used as the wetting dispersant in the following examples.
The defoaming agent may be at least one of BYK077, BYK085, BYK1799 and BYK1790, and BYK077 and BYK1799, which are obtained from BYK chemical company, may be used as the defoaming agent in the following examples.
The leveling agent may be at least one of BYK354, BYK331, and BYK333 from BYK chemical company, and BYK354 from BYK chemical company may be used as the leveling agent in each of the following examples.
The water scavenger can be at least one of silicate molecular sieve particles such as SYLOSIVA4 and SYLOSIVA3 from GRACE; monofunctional isocyanate auxiliaries are, for example, AdditiveTI from Borchers, in the following examples, SYLOSIVA4 silicate molecular sieve particles from GRACE are used as water-removing agents.
The ultraviolet light stabilizing auxiliary agent adopts hindered amine type free radical scavenger TINUVIN 292 of Bassfu company.
The pigment and/or filler may be at least one of titanium dioxide, barium sulfate, wollastonite powder, and feldspar powder, wherein the titanium dioxide is LR972 from boa herborides, the barium sulfate is barium sulfate 303# from orno, and the wollastonite powder is GWF02 from rich mineral companies, and in the following embodiments, LR972 titanium dioxide from boa herborides and barium sulfate 303# from orno are respectively used as the pigment and the filler.
The solvent may be at least one of commercial industrial grade xylene, butyl acetate, propylene glycol monomethyl ether acetate PMA.
The selection of the main materials of polyisocyanate trimer, polyisocyanate prepolymer, polyaspartic acid ester and polycarbonate diol are shown in Table 1.
TABLE 1 Main ingredient List
The rest raw materials are commercial industrial grade or conventional raw materials.
Example 1
A two-component coating special for repairing wind power blades is composed of a component A and a component B.
The component A comprises: 45 g of aliphatic polyisocyanate resin, 19.3 g of solvent (wherein the PMA1 g, the xylene 16.5 g and the ethyl acetate 1.8 g), 26 g of pigment and filler (wherein the titanium dioxide powder is 10 g and the barium sulfate is 16 g) and 9.7 g of auxiliary agent; wherein the aliphatic polyisocyanate resin comprises 5 g of aliphatic isocyanate tripolymer and 40 g of aliphatic diisocyanate-polyol prepolymer; the auxiliary agent comprises 1 g of rheological auxiliary agent, 1 g of ultraviolet light stabilizing auxiliary agent, 1 g of wetting dispersant, 1.2 g of defoaming agent (wherein BYK-0770.7 g, BYK-17990.5 g), 0.5 g of flatting agent and 5 g of dehydrator.
The component B comprises: polyaspartic acid ester resin 10.8 g.
In this embodiment, the aliphatic isocyanate trimer is polyisocyanate trimer 1, the aliphatic diisocyanate-polyol prepolymer is polyisocyanate prepolymer 1, and the polyaspartic acid ester resin is polyaspartic acid ester resin 1.
The preparation method of the two-component coating comprises the following steps:
the method comprises the following steps: premixing 60 percent of aliphatic polyisocyanate resin, rheological additive and all solvents, and dispersing for 5 minutes at the rotating speed of 600-800 revolutions per minute; under the stirring state, adding a wetting dispersant and a defoaming agent, and uniformly mixing at the rotating speed of 600-800 rpm; under the stirring state, adding pigment, filler and water removing agent, and dispersing and grinding at a high speed of 2000-2200 rpm for 15 minutes until the fineness is less than or equal to 20 micrometers; the rotating speed is reduced to 600-800 rpm, the flatting agent, the ultraviolet light stabilizing additive and the residual solvent are added and stirred for 5 minutes to obtain the component A.
Step two: stirring the polyaspartic acid ester resin for 10 minutes at the rotation speed of 600-800 rpm to obtain a component B;
step three: and respectively sealing the component A and the component B in a double-component aerosol spray can to obtain a finished product.
Example 2
A two-component coating special for repairing wind power blades is composed of a component A and a component B.
The component A comprises: 45 g of aliphatic polyisocyanate resin, 19.3 g of solvent (wherein the PMA1 g, the xylene 16.5 g and the ethyl acetate 1.8 g), 26 g of pigment and filler (wherein the titanium dioxide powder is 10 g and the barium sulfate is 16 g) and 9.7 g of auxiliary agent; wherein the aliphatic polyisocyanate resin comprises 5 g of aliphatic isocyanate tripolymer and 40 g of aliphatic diisocyanate-polyol prepolymer; the auxiliary agent comprises 1 g of rheological auxiliary agent, 1 g of ultraviolet light stabilizing auxiliary agent, 1 g of wetting dispersant, 1.2 g of defoaming agent (wherein BYK-0770.7 g, BYK-17990.5 g), 0.5 g of flatting agent and 5 g of dehydrator.
The component B comprises: 8.95 g of polyaspartic ester resin.
In this embodiment, the aliphatic isocyanate trimer is polyisocyanate trimer 1, the aliphatic diisocyanate-polyol prepolymer is polyisocyanate prepolymer 1, and the polyaspartic acid ester resin is polyaspartic acid ester resin 2.
The preparation method of the two-component coating comprises the following steps:
the method comprises the following steps: premixing 77% of aliphatic polyisocyanate resin, rheological additive and all solvents, and dispersing for 5 minutes at the rotating speed of 600-800 rpm; under the stirring state, adding a wetting dispersant and a defoaming agent, and uniformly mixing at the rotating speed of 600-800 rpm; under the stirring state, adding pigment, filler and water removing agent, and dispersing and grinding at a high speed of 2000-2200 rpm for 15 minutes until the fineness is less than or equal to 20 micrometers; reducing the rotating speed to 600-800 rpm, adding the flatting agent, the ultraviolet light stabilizing auxiliary agent and the residual solvent, and stirring for 5 minutes to obtain the component A.
Step two: stirring the polyaspartic acid ester resin for 10 minutes at the rotation speed of 600-800 rpm to obtain a component B;
step three: and respectively sealing the component A and the component B in a double-component aerosol spray can to obtain a finished product.
The contents of each component of component A and component B in examples 3 to 10 are shown in Table 2.
Table 2 content units of each component in example 3 to example 10: keke (Chinese character of 'Keke')
Wherein the rheological additive is BENTONE 52; the wetting dispersant is DISPERBYK-163; the defoaming agent is BYK-077 and BYK-1799, and the mass ratio of the defoaming agent to the defoaming agent is 7: 5; the water removing agent is SYLOSIV A4; the pigment is titanium dioxide LR 972; the filler is barium sulfate 303; the flatting agent is BYK-354; the ultraviolet light stabilizing additive is Tinuvin 292.
Examples 4-8 and example 10 were prepared according to the same method as example 1.
The preparation methods in the embodiment 3 and the embodiment 9 are basically the same as the embodiment 1, and the difference is only in the second step: the polyaspartic acid ester resin and the polycarbonate polyol are stirred for 10 minutes at the rotation speed of 600-800 r/min to obtain the component B.
The coatings obtained in examples 1-10 and comparative examples 1-3 are subjected to spraying construction, and the construction method comprises the following steps:
according to the using method of the bi-component aerosol spray can, the component A and the component B are mixed and shaken for 2-3 minutes until the mixture is uniform. The panels were prepared by spraying according to 6.2 of GB/T1727-1992 paint film general preparation. Then, the mixture was cured for 7 days (except for the drying time performance) in a ventilated environment at room temperature of 23. + -. 2 ℃ and a relative humidity of 50. + -. 5%.
The coatings were tested for drying time, gloss, tensile, light and droplet erosion resistance as follows, and the results are shown in Table 3.
The surface dry time is tested according to the 'touch method' in GB/T1728-2020;
the actual drying time is tested according to the cotton ball pressing method in GB/T1728-;
the gloss was tested according to GB/T9754-2007 for 60 ℃ angle specular gloss;
tensile strain rate and tensile break strength were tested according to ISO 527;
ultraviolet light resistance is tested according to ISO 16474-3:2013Type 1A, method1 QUVA-340nm exposure 3000 hours, and pulverization grade and color difference grade are judged according to GB/T1766-;
the drop erosion resistance of a sample coated with the coating is tested according to ASTMG73-10, the coating is punctured to the substrate for the required time under the high-speed rotation state, the maximum speed of blade tip rotation is 160m/s, the diameter of the drop is 2-3 mm, and the simulated rainfall is 35 mm/h.
Table 3 results of performance testing
According to examples 1-3, using aliphatic isocyanate trimer 1 and aliphatic diisocyanate-polyol prepolymer-1 the ratio of 5: 45, and a bi-component paint film generated by reacting the component A prepared by mixing the components with different polyaspartic acid esters or the mixture of the polyaspartic acid esters and the polycarbonate has the advantages of high drying speed, high glossiness, high tensile strain rate and tensile breaking strength, excellent ultraviolet light resistance and droplet erosion resistance and the like.
According to example 4, the two-component paint film produced by reacting the A component prepared by only using the aliphatic diisocyanate-polyol prepolymer-1 with polyaspartic acid ester can also achieve good performance, but the reaction speed is slower than that of examples 1-3
According to examples 5 and 7, the content of aliphatic isocyanate resin in component A (35-50%) is adjusted, and the two-component paint film produced by the reaction with polyaspartic acid ester can also achieve good drying and mechanical properties.
According to example 6, the mechanical properties and the resistance to droplet erosion of the two-component paint film formed by the reaction of the isocyanate trimer type in the aliphatic isocyanate resin in the component A and the polyaspartic acid ester are reduced, but the use of the product with lower protection requirements can be still met.
According to the embodiments 8-10, the type of the isocyanate prepolymer in the aliphatic isocyanate resin in the component A is adjusted, and the two-component paint film generated by the reaction of the isocyanate prepolymer and the polyaspartic acid ester has reduced droplet erosion resistance or ultraviolet light aging resistance, but can still meet the use of products with lower protection requirements.
The above detailed description is only for explaining the present application and not for limiting the present application, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. The two-component coating special for repairing the surface coating of the wind power blade consists of a component A and a component B, and is characterized in that the component A comprises the following components in percentage by mass: 30-50% of aliphatic polyisocyanate resin, 15-25% of solvent, 10-50% of pigment and/or filler and the balance of auxiliary agent; the component B comprises the following components in percentage by mass: 70-100% of polyaspartic acid ester resin and 0-30% of polycarbonate polyol;
the aliphatic polyisocyanate resin comprises the following components in percentage by mass: 0-15% of aliphatic isocyanate tripolymer and 85-100% of aliphatic diisocyanate-polyol prepolymer;
the component A and the component B are respectively packaged by adopting a double-component aerosol spray can.
2. The two-component coating special for repairing the surface coating of the wind power blade according to claim 1, wherein the aliphatic isocyanate trimer is hexamethylene diisocyanate trimer, isophorone diisocyanate trimer or 4,4' -dicyclohexylmethane diisocyanate trimer.
3. The special two-component coating for repairing the surface coating of the wind power blade according to claim 1, wherein the aliphatic diisocyanate-polyol prepolymer is a prepolymer of hexamethylene diisocyanate, isophorone diisocyanate or 4,4' -dicyclohexylmethane diisocyanate and polyester or polyether polyol.
4. The two-component paint special for repairing the surface coating of the wind power blade as claimed in claim 1, wherein the solvent is xylene, butyl acetate or propylene glycol methyl ether acetate.
5. The two-component coating special for repairing the surface coating of the wind power blade as claimed in claim 1, wherein the aliphatic polyisocyanate resin is prepared by the following steps: the aliphatic isocyanate tripolymer and the aliphatic diisocyanate-polyol prepolymer are stirred evenly at medium speed and filled with inert gas for protection.
6. The two-component paint special for repairing wind turbine blade surface coatings according to claim 1, characterized in that the polyaspartate resin is tetraethyl R-bisaspartate, wherein R is 2-methyl-1, 5-pentanediyl, 4,4 '-dicyclohexylmethylene, 4,4' -dimethylcyclohexylmethylene, iso (2,4,4 '-trimethyl) cyclohexylethylene or 1,4' -cyclohexyl.
7. The two-component coating special for repairing the surface coating of the wind power blade as claimed in claim 1, wherein the polycarbonate polyol is a hydroxyl polycarbonate polyol resin produced by the reaction of ethyl carbonate and dihydric alcohol under phosgene.
8. The two-component coating special for repairing the surface coating of the wind power blade as claimed in claim 1, wherein the ratio of the component A to the component B is determined according to the molar ratio of the sum of-NH and-OH to-NCO being 1 (1-1.2).
9. The two-component coating special for repairing the surface coating of the wind turbine blade as claimed in any one of claims 1 to 8, wherein the auxiliary agent comprises the following components in percentage by mass: 1-3 parts of rheological additive, 0.5-1.5 parts of ultraviolet light stabilizing additive, 0.5-1.5 parts of wetting dispersant, 1-3 parts of defoaming agent, 0.5-1.5 parts of flatting agent and 1-5 parts of water removing agent.
10. The two-component coating special for repairing the surface coating of the wind power blade as claimed in claim 9, wherein the preparation method comprises the following steps:
(1) preparation of component A
1.1 premixing aliphatic polyisocyanate resin, rheological additive and organic solvent accounting for 50-80% of all solvents;
1.2 adding a wetting dispersant, a defoaming agent and a rheological additive under a stirring state, and uniformly mixing;
1.3 under the stirring state, adding pigment and/or filler and water removing agent, dispersing and grinding until the fineness is less than or equal to 20 micrometers;
1.4 adding the flatting agent, the ultraviolet light stabilizing auxiliary agent and the rest of the organic solvent in a stirring state, and uniformly stirring to obtain a component A;
(2) preparation of component B
Uniformly stirring and mixing the polyaspartic ester resin and the polycarbonate polyol to obtain a component B;
(3) sealing the component A and the component B in a bi-component aerosol spray can to obtain a finished product.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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