CN110591540A - Primer for wind driven generator blade - Google Patents
Primer for wind driven generator blade Download PDFInfo
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- CN110591540A CN110591540A CN201910903285.2A CN201910903285A CN110591540A CN 110591540 A CN110591540 A CN 110591540A CN 201910903285 A CN201910903285 A CN 201910903285A CN 110591540 A CN110591540 A CN 110591540A
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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
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
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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
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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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
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
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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
- C08G18/83—Chemically modified polymers
- C08G18/838—Chemically modified polymers by compounds containing heteroatoms other than oxygen, halogens, nitrogen, sulfur, phosphorus or silicon
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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
- C09D175/08—Polyurethanes from polyethers
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention discloses a primer for a wind driven generator blade, which is prepared by the following steps: 1) carrying out copolymerization reaction on polyol, diisocyanate, diketogulonic acid and dimethyl pyridine to prepare modified polyurethane resin; 2) dissolving the modified polyurethane resin, adding a cerium chloride solution, heating for reaction, removing the solvent, washing and drying; 3) dissolving the product obtained in the step 2), adding a ferric trichloride solution, stirring for reaction, removing the solvent, and drying to obtain the coordination crosslinking polyurethane resin; 4) grinding the coordination crosslinking polyurethane resin, titanium dioxide, the flatting agent, the drier and propylene glycol to obtain slurry, dissolving the epoxy resin, adding the anti-settling agent, stirring, adding the mixture into the slurry, and stirring and filtering to obtain the primer. The primer has excellent adhesive force, can be firmly attached to a base material, has good binding force with a coating layer, is beneficial to leveling and spreading of the coating on the surface of the primer, and improves the appearance texture of the coating.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a primer for a wind power generator blade.
Background
Wind energy is a pollution-free renewable energy source, is inexhaustible, and has no problem of environmental pollution caused by conventional energy sources and nuclear power. At present, wind power technology is mature day by day, product quality is reliable, availability ratio reaches more than 95%, the wind power technology becomes a safe and reliable energy source, economy of wind power generation is improved day by day, power generation cost is close to coal power and lower than oil power and nuclear power, and if indirect investment of environment protection and transportation of the coal power is involved, economy of the wind power is superior to that of the coal power.
The generator blade is one of key core components of the wind driven generator, and is well designed, reliable quality and superior performance ensure the determining factors of normal and stable operation of a unit, and the generator blade is corroded by environmental factors such as sand blown by the wind, rain, salt mist and the like in the operation process, so the generator blade needs to be protected by coating, such as polyurethane coating, epoxy resin coating, acrylate ester coating and the like.
Therefore, the problem of improving the adhesion of the blade coating and enhancing the protection of the coating to the blade is urgently solved in the field.
Disclosure of Invention
The invention aims to solve the existing problems and provides a primer for a blade of a wind driven generator, which improves the adhesive force of a coating by utilizing the characteristics of firm adhesion and good performance on the blade so as to enhance the protective effect of the coating on the blade.
The invention is realized by the following technical scheme:
a primer for a wind driven generator blade is prepared by the following steps:
1) mixing diketogulonic acid, dimethyl pyridine and isophorone diisocyanate, adding the mixture into a reactor, introducing nitrogen to discharge air, adding dried and dewatered N, N-dimethylformamide, heating to 85-95 ℃, reacting at a constant temperature for 10-15h, adding polytetrahydrofuran ether and dibutyltin dilaurate into a reaction product, stirring for 30-40min, then continuing to react for 4-6h, adding anhydrous N, N-dimethylformamide and 1, 4-butanediol after the reaction is finished, reacting at 70-80 ℃ for 30-50min, and distilling the obtained reaction product at 40-50 ℃ under reduced pressure to remove a solvent to obtain the modified polyurethane resin; the modified polyurethane resin is prepared by copolymerization of polyol, diisocyanate, diketogulonic acid and lutidine and introducing diketo and pyridine groups into the main chain of polyurethane;
2) adding cerium chloride into an acetone solution, stirring and dissolving to prepare a solution of 50-80mg/ml, then dissolving the modified polyurethane resin into a dimethylformamide solution, adding a proper amount of cerium chloride solution, reacting at 60-70 ℃ for 20-25h, standing at room temperature for 3-5h after the reaction is finished, then pouring into a polytetrafluoroethylene membrane, washing with distilled water for 3-5 times after the solvent is completely volatilized, and drying at 50-60 ℃ for 5-8 h; by utilizing the characteristics of large radius, multiple empty tracks and high coordination number of the rare earth element cerium, a coordination system with high bonding strength is formed by the coordination of cerium ions in cerium chloride and diketone ligands in modified polyurethane, and the bond formed between cerium and oxygen in diketone groups is obviously stronger than a hydrogen bond, so that the mechanical property of polyurethane can be improved, the mechanical strength and flexibility of a primer film can be improved, and the primer can be prevented from cracking;
3) adding a proper amount of ferric trichloride powder into a methanol solution to prepare a solution of 100-150mg/ml, then dissolving the product obtained in the step 2) into a dimethylformamide solution, adding a proper amount of ferric trichloride solution, stirring at the rotating speed of 100-150r/min at room temperature for 20-30h, then pouring into a polytetrafluoroethylene membrane, drying in a vacuum oven at 90-110 ℃ for 10-15h after the solvent is completely volatilized, and then taking the product out of the polytetrafluoroethylene membrane to prepare the coordination crosslinking polyurethane resin; fe is formed by ferric iron in ferric chloride and pyridine group in main chain of modified polyurethane resin+3Pyridine metal coordination bonds, the metal coordination bonds formed forming strong interaction forces in the macromolecular polyurethane structure, allowing microphase separation processesThe degree is obvious, and the crystallization of the polyurethane hard segment micro-area is promoted, so that the crystallinity of the polyurethane is obviously improved;
4) mixing and grinding the coordination crosslinking polyurethane resin, titanium dioxide, a flatting agent, a drier and propylene glycol to obtain slurry, dissolving the epoxy resin into a solution by using dimethylbenzene, adding an anti-settling agent, stirring at the rotation speed of 500-600r/min for 20-30min to obtain a mixed solution, adding the mixed solution into the slurry, uniformly mixing and stirring, and filtering to obtain the primer.
Preferably, in the step 1), the mass volume ratio of the diketogulonic acid, the lutidine, the isophorone diisocyanate, the dried and water-removed N, N-dimethylformamide, the polytetrahydrofuran ether, the anhydrous N, N-dimethylformamide and the 1, 4-butanediol is 1-1.3 g: 1.4-1.8 g: 3.2-3.7g, 5-8 ml: 20-25 g: 25-30 ml: 0.2-0.5 g; the addition amount of the dibutyltin dilaurate is 0.1-0.3% of the total weight of the reaction system; the stirring speed is 80-120 r/min.
Preferably, the primer for the blades of the wind driven generator is characterized in that in the step 2), the mass-to-volume ratio of the modified polyurethane resin to the dimethyl formamide is 1:35-50 g/ml; the mass ratio of the cerous chloride to the modified polyurethane resin in the reaction system is 1: 7-12.
Preferably, the primer for the blades of the wind driven generator is used, wherein in the step 3), the mass-to-volume ratio of the product in the step 2) to the dimethylformamide is 1:35-50 g/ml; the mass ratio of ferric trichloride to the product in 2) in the reaction system is 1: 1-2.
Preferably, in the step 4), the leveling agent is an acrylate defoaming agent, the drier is dibutyltin dilaurate, and the anti-settling agent is organic bentonite; the weight ratio of the coordination crosslinking polyurethane resin to the titanium dioxide to the leveling agent to the drier to the propylene glycol to the xylene to the epoxy resin to the anti-settling agent is 50-60:5-8:0.2-0.5: 0.1-0.3: 10-15:15-20:6-12: 3-5; the fineness of grinding is not more than 20 um; the viscosity of the primer is 400-500 Pa.s.
Compared with the prior art, the invention has the following advantages:
the primer prepared in the application belongs to polyurethane primers, a diketone group and a pyridyl group are introduced into a main chain of polyurethane through copolymerization reaction, and then the diketone group and cerium ions are coordinated to form a ligand with high bonding strength, so that the mechanical property and the flexibility of the primer are improved; the pyridyl forms a strong metal coordination bond with iron ions, and the strong metal coordination bond is combined with the weak hydrogen bond effect of polyurethane to form a hybrid cross-linked network structure, so that the decomposition temperature of a hard segment structure in a polyurethane molecular chain can be increased, the thermal stability of the primer is improved, the crystallinity of the polyurethane can be obviously improved by the formed strong metal coordination bond, the crystallinity of a primer coating film is increased, the surface tension of the coating film is increased, the improvement of the interlayer adhesive force of the coating film and the promotion of defoaming and defoaming are facilitated, the leveling and spreading of the coating on the surface of the primer are facilitated, and the appearance texture of the coating is improved.
Detailed Description
The present invention will be further described with reference to specific embodiments.
Example 1
A primer for a wind driven generator blade is prepared by the following steps:
1) mixing diketogulonic acid, dimethyl pyridine and isophorone diisocyanate, adding the mixture into a reactor, introducing nitrogen to discharge air, adding dried and dewatered N, N-dimethylformamide, heating to 85 ℃, reacting at a constant temperature for 15 hours, adding polytetrahydrofuran ether and dibutyltin dilaurate into a reaction product, stirring for 30 minutes, continuing to react for 6 hours, adding anhydrous N, N-dimethylformamide and 1, 4-butanediol after the reaction is finished, reacting at 70 ℃ for 50 minutes, and distilling the obtained reaction product at 40 ℃ under reduced pressure to remove a solvent to obtain modified polyurethane resin;
2) adding cerium chloride into an acetone solution, stirring and dissolving to prepare a solution of 50mg/ml, then dissolving the modified polyurethane resin into a dimethylformamide solution, adding a proper amount of cerium chloride solution, reacting at 60 ℃ for 25 hours, standing at room temperature for 3 hours after the reaction is finished, then pouring into a polytetrafluoroethylene membrane, washing with distilled water for 3 times after the solvent is completely volatilized, and drying at 50 ℃ for 8 hours;
3) adding a proper amount of ferric trichloride powder into a methanol solution to prepare a solution of 100mg/ml, then dissolving the product obtained in the step 2) into a dimethylformamide solution, adding a proper amount of ferric trichloride solution, stirring at the room temperature at the rotating speed of 100r/min for 30 hours, then pouring into a polytetrafluoroethylene membrane, drying in a vacuum oven at 90 ℃ for 15 hours after the solvent is completely volatilized, and then taking the product out of the polytetrafluoroethylene membrane to obtain the coordination crosslinking polyurethane resin;
4) mixing and grinding the coordination crosslinking polyurethane resin, titanium dioxide, a leveling agent, a drier and propylene glycol to obtain slurry, dissolving the epoxy resin into a solution by using dimethylbenzene, adding an anti-settling agent, stirring at the rotating speed of 500r/min for 30min to obtain a mixed solution, adding the mixed solution into the slurry, uniformly mixing and stirring, and filtering to obtain the primer.
Preferably, in the step 1), the mass-to-volume ratio of the diketogulonic acid, the lutidine, the isophorone diisocyanate, the dried and water-removed N, N-dimethylformamide, the polytetrahydrofuran ether, the anhydrous N, N-dimethylformamide and the 1, 4-butanediol is 1 g: 1.4 g: 3.2g:5 ml: 20 g: 25 ml: 0.2-0.5 g; the addition amount of the dibutyltin dilaurate is 0.1% of the total weight of the reaction system; the stirring speed is 120 r/min.
Preferably, in the step 2), the mass-to-volume ratio of the modified polyurethane resin to the dimethylformamide is 1:35 g/ml; the mass ratio of the cerous chloride to the modified polyurethane resin in the reaction system is 1: 7.
Preferably, in the step 3), the mass-to-volume ratio of the product in the step 2) to the dimethylformamide is 1:35 g/ml; the mass ratio of ferric trichloride to the product in 2) in the reaction system is 1:1.
Preferably, in the step 4), the leveling agent is an acrylate defoaming agent, the drier is dibutyltin dilaurate, and the anti-settling agent is organic bentonite; the weight ratio of the coordination crosslinking polyurethane resin, the titanium dioxide, the flatting agent, the drier, the propylene glycol, the dimethylbenzene, the epoxy resin and the anti-settling agent is 50:5:0.2: 0.1: 10:15:6: 3; the fineness of grinding is not more than 20 um; the viscosity of the primer was 400 pa.s.
Example 2
A primer for a wind driven generator blade is prepared by the following steps:
1) mixing diketogulonic acid, dimethyl pyridine and isophorone diisocyanate, adding the mixture into a reactor, introducing nitrogen to discharge air, adding dried and dewatered N, N-dimethylformamide, heating to 90 ℃, reacting at a constant temperature for 13h, adding polytetrahydrofuran ether and dibutyltin dilaurate into a reaction product, stirring for 35min, continuing to react for 5h, adding anhydrous N, N-dimethylformamide and 1, 4-butanediol after the reaction is finished, reacting at 75 ℃ for 40min, and distilling the obtained reaction product at 45 ℃ under reduced pressure to remove a solvent to obtain modified polyurethane resin;
2) adding cerium chloride into an acetone solution, stirring and dissolving to prepare a 70mg/ml solution, then dissolving the modified polyurethane resin into a dimethylformamide solution, adding a proper amount of cerium chloride solution, reacting at 65 ℃ for 23 hours, standing at room temperature for 4 hours after the reaction is finished, then pouring into a polytetrafluoroethylene membrane, washing with distilled water for 4 times after the solvent is completely volatilized, and drying at 55 ℃ for 7 hours;
3) adding a proper amount of ferric trichloride powder into a methanol solution to prepare a solution of 130mg/ml, then dissolving the product obtained in the step 2) into a dimethylformamide solution, adding a proper amount of ferric trichloride solution, stirring at the room temperature for 25 hours at the rotating speed of 125r/min, then pouring into a polytetrafluoroethylene membrane, drying in a vacuum oven at 100 ℃ for 13 hours after the solvent is completely volatilized, and then taking the product out of the polytetrafluoroethylene membrane to obtain the coordination crosslinking polyurethane resin;
4) mixing and grinding the coordination crosslinking polyurethane resin, titanium dioxide, a leveling agent, a drier and propylene glycol to obtain slurry, dissolving the epoxy resin into a solution by using dimethylbenzene, adding an anti-settling agent, stirring at the rotation speed of 550r/min for 25min to obtain a mixed solution, adding the mixed solution into the slurry, uniformly mixing and stirring, and filtering to obtain the primer.
Preferably, in the step 1), the mass-to-volume ratio of the diketogulonic acid, the lutidine, the isophorone diisocyanate, the dried and water-removed N, N-dimethylformamide, the polytetrahydrofuran ether, the anhydrous N, N-dimethylformamide and the 1, 4-butanediol is 1.2 g: 1.6 g: 3.5g, 7 ml: 23 g: 28 ml: 0.3 g; the addition amount of the dibutyltin dilaurate is 0.2 percent of the total weight of the reaction system; the stirring speed is 100 r/min.
Preferably, in the step 2), the mass-to-volume ratio of the modified polyurethane resin to the dimethylformamide is 1:40 g/ml; the mass ratio of the cerous chloride to the modified polyurethane resin in the reaction system is 1: 10.
Preferably, in the step 3), the mass-to-volume ratio of the product in the step 2) to the dimethylformamide is 1:45 g/ml; the mass ratio of ferric trichloride to the product in 2) in the reaction system is 1: 1.5.
Preferably, in the step 4), the leveling agent is an acrylate defoaming agent, the drier is dibutyltin dilaurate, and the anti-settling agent is organic bentonite; the weight ratio of the coordination crosslinking polyurethane resin to the titanium dioxide to the leveling agent to the drier to the propylene glycol to the xylene to the epoxy resin to the anti-settling agent is 55:7:0.3: 0.2: 12:18:10: 4; the fineness of grinding is not more than 20 um; the viscosity of the primer was 450 pa.s.
Example 3
A primer for a wind driven generator blade is prepared by the following steps:
1) mixing diketogulonic acid, dimethyl pyridine and isophorone diisocyanate, adding the mixture into a reactor, introducing nitrogen to discharge air, adding dried and dewatered N, N-dimethylformamide, heating to 95 ℃, reacting at a constant temperature for 10 hours, adding polytetrahydrofuran ether and dibutyltin dilaurate into a reaction product, stirring for 40 minutes, continuing to react for 4 hours, adding anhydrous N, N-dimethylformamide and 1, 4-butanediol after the reaction is finished, reacting for 30 minutes at 80 ℃, distilling the obtained reaction product at 50 ℃ under reduced pressure to remove a solvent, and obtaining the modified polyurethane resin;
2) adding cerium chloride into an acetone solution, stirring and dissolving to prepare a solution of 80mg/ml, then dissolving the modified polyurethane resin into a dimethylformamide solution, adding a proper amount of cerium chloride solution, reacting at 70 ℃ for 20 hours, standing at room temperature for 5 hours after the reaction is finished, then pouring into a polytetrafluoroethylene membrane, washing with distilled water for 5 times after the solvent is completely volatilized, and drying at 60 ℃ for 5 hours;
3) adding a proper amount of ferric trichloride powder into a methanol solution to prepare a solution of 150mg/ml, then dissolving the product obtained in the step 2) into a dimethylformamide solution, adding a proper amount of ferric trichloride solution, stirring at the room temperature at the rotating speed of 150r/min for 20 hours, then pouring into a polytetrafluoroethylene membrane, drying in a vacuum oven at the temperature of 110 ℃ for 10 hours after the solvent is completely volatilized, and then taking the product out of the polytetrafluoroethylene membrane to obtain the coordination crosslinking polyurethane resin;
4) mixing and grinding the coordination crosslinking polyurethane resin, titanium dioxide, a leveling agent, a drier and propylene glycol to obtain slurry, dissolving the epoxy resin into a solution by using dimethylbenzene, adding an anti-settling agent, stirring at the rotating speed of 600r/min for 20min to obtain a mixed solution, adding the mixed solution into the slurry, uniformly mixing and stirring, and filtering to obtain the primer.
Preferably, in the step 1), the mass-to-volume ratio of the diketogulonic acid, the lutidine, the isophorone diisocyanate, the dried and water-removed N, N-dimethylformamide, the polytetrahydrofuran ether, the anhydrous N, N-dimethylformamide and the 1, 4-butanediol is 1.3 g: 1.8 g: 3.7g, 8 ml: 25g of: 30 ml: 0.5 g; the addition amount of the dibutyltin dilaurate is 0.3 percent of the total weight of the reaction system; the stirring speed is 80 r/min.
Preferably, in the step 2), the mass-to-volume ratio of the modified polyurethane resin to the dimethylformamide is 1:50 g/ml; the mass ratio of the cerous chloride to the modified polyurethane resin in the reaction system is 1: 12.
Preferably, in the step 3), the mass-to-volume ratio of the product in the step 2) to the dimethylformamide is 1:50 g/ml; the mass ratio of ferric trichloride to the product in 2) in the reaction system is 1: 2.
Preferably, in the step 4), the leveling agent is an acrylate defoaming agent, the drier is dibutyltin dilaurate, and the anti-settling agent is organic bentonite; the weight ratio of the coordination crosslinking polyurethane resin to the titanium dioxide to the leveling agent to the drier to the propylene glycol to the xylene to the epoxy resin to the anti-settling agent is 60:8:0.5: 0.3: 15:20:12: 5; the fineness of grinding is not more than 20 um; the viscosity of the primer was 500 pa.s.
Comparative example 1: the diketogulonic acid in step 1) was removed and the procedure was as in example 1.
Comparative example 2: the lutidine in step 1) was removed and the procedure was the same as in example 1.
Comparative example 3: step 2) was removed, and the rest was the same as in example 1.
Comparative example 4: step 3) was removed, and the rest was the same as in example 1.
Control group: the primer prepared in example 1 disclosed in publication No. CN101695689B was selected.
Test example: the primers prepared in examples 1 to 3 and comparative examples 1 to 4 were coated on the blades of the wind power generator, respectively, with a thickness of 75um, and various properties of the primers were measured, and then an anticorrosive polyurethane coating was coated on the primers with a thickness of 75um, and the appearance of the coating was observed after the coating was cured, with the results shown in the following table:
note: the priming paint and the coating were applied by conventional methods in the art.
As can be seen from the above table, the primer prepared by the invention not only has excellent adhesive force and flexibility, but also has flat, smooth and high leveling coating film, and is also beneficial to leveling and spreading of the coating on the surface of the primer, and the appearance texture of the coating has an enhancing effect.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.
Claims (5)
1. The primer for the blades of the wind driven generator is characterized by comprising the following steps:
1) mixing diketogulonic acid, dimethyl pyridine and isophorone diisocyanate, adding the mixture into a reactor, introducing nitrogen to discharge air, adding dried and dewatered N, N-dimethylformamide, heating to 85-95 ℃, reacting at a constant temperature for 10-15h, adding polytetrahydrofuran ether and dibutyltin dilaurate into a reaction product, stirring for 30-40min, then continuing to react for 4-6h, adding anhydrous N, N-dimethylformamide and 1, 4-butanediol after the reaction is finished, reacting at 70-80 ℃ for 30-50min, and distilling the obtained reaction product at 40-50 ℃ under reduced pressure to remove a solvent to obtain the modified polyurethane resin;
2) adding cerium chloride into an acetone solution, stirring and dissolving to prepare a solution of 50-80mg/ml, then dissolving the modified polyurethane resin into a dimethylformamide solution, adding a proper amount of cerium chloride solution, reacting at 60-70 ℃ for 20-25h, standing at room temperature for 3-5h after the reaction is finished, then pouring into a polytetrafluoroethylene membrane, washing with distilled water for 3-5 times after the solvent is completely volatilized, and drying at 50-60 ℃ for 5-8 h;
3) adding a proper amount of ferric trichloride powder into a methanol solution to prepare a solution of 100-150mg/ml, then dissolving the product obtained in the step 2) into a dimethylformamide solution, adding a proper amount of ferric trichloride solution, stirring at the rotating speed of 100-150r/min at room temperature for 20-30h, then pouring into a polytetrafluoroethylene membrane, drying in a vacuum oven at 90-110 ℃ for 10-15h after the solvent is completely volatilized, and then taking the product out of the polytetrafluoroethylene membrane to prepare the coordination crosslinking polyurethane resin;
4) mixing and grinding the coordination crosslinking polyurethane resin, titanium dioxide, a flatting agent, a drier and propylene glycol to obtain slurry, dissolving the epoxy resin into a solution by using dimethylbenzene, adding an anti-settling agent, stirring at the rotation speed of 500-600r/min for 20-30min to obtain a mixed solution, adding the mixed solution into the slurry, uniformly mixing and stirring, and filtering to obtain the primer.
2. The primer for the blade of the wind driven generator according to claim 1, wherein in the step 1), the mass volume ratio of the diketogulonic acid, the lutidine, the isophorone diisocyanate, the dried and dehydrated N, N-dimethylformamide, the polytetrahydrofuran ether, the anhydrous N, N-dimethylformamide and the 1, 4-butanediol is 1 to 1.3 g: 1.4-1.8 g: 3.2-3.7g, 5-8 ml: 20-25 g: 25-30 ml: 0.2-0.5 g; the addition amount of the dibutyltin dilaurate is 0.1-0.3% of the total weight of the reaction system; the stirring speed is 80-120 r/min.
3. The primer for the blade of the wind driven generator as claimed in claim 1, wherein in the step 2), the mass-to-volume ratio of the modified polyurethane resin to the dimethylformamide is 1:35-50 g/ml; the mass ratio of the cerous chloride to the modified polyurethane resin in the reaction system is 1: 7-12.
4. The primer for the blade of the wind driven generator as claimed in claim 1, wherein in the step 3), the mass-to-volume ratio of the product in the step 2) to the dimethylformamide is 1:35-50 g/ml; the mass ratio of ferric trichloride to the product in 2) in the reaction system is 1: 1-2.
5. The primer for the blades of the wind driven generator as claimed in claim 1, wherein in the step 4), the leveling agent is an acrylate type defoaming agent, the drier is dibutyltin dilaurate, and the anti-settling agent is organic bentonite; the weight ratio of the coordination crosslinking polyurethane resin to the titanium dioxide to the leveling agent to the drier to the propylene glycol to the xylene to the epoxy resin to the anti-settling agent is 50-60:5-8:0.2-0.5: 0.1-0.3: 10-15:15-20:6-12: 3-5; the fineness of grinding is not more than 20 um; the viscosity of the primer is 400-500 Pa.s.
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| CN101535380A (en) * | 2006-10-26 | 2009-09-16 | 巴斯夫公司 | Metal coordinating and film-forming materials |
| CN105567073A (en) * | 2015-12-30 | 2016-05-11 | 安徽安大华泰新材料有限公司 | High performance modified polyurethane coating |
| CN105860733A (en) * | 2016-04-18 | 2016-08-17 | 芜湖县双宝建材有限公司 | Low-temperature-resistant aqueous polyurethane coating |
| CN109608605A (en) * | 2017-12-19 | 2019-04-12 | 传化智联股份有限公司 | A kind of ion-non-ion aqueous polyurethane dispersion preparation |
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