CN110885606A - Water-based fluorocarbon metallic paint for high-reflection external wall and preparation method thereof - Google Patents
Water-based fluorocarbon metallic paint for high-reflection external wall and preparation method thereof Download PDFInfo
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- CN110885606A CN110885606A CN201911134482.9A CN201911134482A CN110885606A CN 110885606 A CN110885606 A CN 110885606A CN 201911134482 A CN201911134482 A CN 201911134482A CN 110885606 A CN110885606 A CN 110885606A
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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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
- C09D5/004—Reflecting paints; Signal 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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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
- C09D7/20—Diluents or solvents
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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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention relates to a coating for decorating an external wall of a building, in particular to a water-based fluorocarbon metallic paint for the external wall. The invention relates to a water-based fluorocarbon metallic paint for a high-reflection external wall, which comprises the following components in parts by weight: 20-25 parts of deionized water, 0.02-0.1 part of water-based wax slurry, 0.2-0.5 part of dispersing agent, 0.05-0.1 part of wetting agent, 1-3 parts of propylene glycol, 0.1-0.2 part of AMP-95 multifunctional agent, 0.2-0.5 part of defoaming agent, 0.1-0.2 part of sterilization mildew preventive, 10-15 parts of aluminum powder slurry, 5-10 parts of reflection heat insulation raw material, 45-55 parts of self-crosslinking core-shell structure fluorocarbon emulsion, 1.5-4 parts of film forming auxiliary agent, 0.1-0.5 part of thickening and leveling agent and 0.1-0.3 part of rheological auxiliary agent. The invention develops a water-based fluorocarbon metallic paint for high-reflection external walls, which has a high reflection effect by selecting a proper reflection raw material and a specific aluminum powder, matching with a proper fluorocarbon emulsion and combining with an environment-friendly auxiliary agent.
Description
Technical Field
The invention relates to a coating for decorating an external wall of a building, in particular to a water-based fluorocarbon metallic paint for the external wall.
Background
The production value and the sales volume of the building coating in the building industry are frequently innovative in several years, the building coating plays an important role in national economic development, the basic mode of the national economic development develops towards the direction of saving resources, saving energy, reducing emission, protecting the environment and recycling low carbon in recent years, and various reflective heat-insulating coatings for exterior wall buildings are widely applied. However, the existing research on the reflective insulation of the water-based fluorocarbon metal coating is not mature enough, and the solvent-based fluorocarbon metal paint on the market is more and has lower reflectivity; meanwhile, the metal paint coating is hard, compact and inelastic, cracks cannot be effectively covered, the phenomena of metal paint cracking, hollowing and even falling occur, and in addition, the application of the solvent type fluorocarbon metal paint is limited due to great environmental pollution during construction.
The water-based fluorocarbon metal coating with the reflection effect has the decoration effect of metal silver flashing texture, has higher light reflectivity, can reflect sunlight, reduces the surface temperature of an outer wall exposed to solar radiation, and has lasting weather resistance, excellent stain resistance and other excellent performances; and the water is used as a diluent, and the water does not contain an organic solvent, has less Volatile Organic Compounds (VOC), is harmless to human bodies, and does not pollute the environment. The water-based fluorocarbon metal coating with high reflection effect has extremely high market application value undoubtedly.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the water-based fluorocarbon metallic paint for the outer wall, which has a high reflection effect, can reduce the surface temperature of the outer wall exposed to solar radiation, has a good metal texture decoration effect on a coating, and has good weather resistance and stain resistance.
In order to achieve the purpose, the water-based fluorocarbon metallic paint for the high-reflection exterior wall disclosed by the invention comprises the following components in parts by weight:
20-25 parts of deionized water
0.02-0.1 part of water-based wax slurry
0.2 to 0.5 portion of dispersant
0.05 to 0.1 portion of wetting agent
1-3 parts of propylene glycol
0.1-0.2 part of AMP-95 multifunctional agent
0.2 to 0.5 portion of defoaming agent
0.1-0.2 part of sterilization and mildew-proof agent
10-15 parts of aluminum paste
5-10 parts of reflective heat-insulating raw material
45-55 parts of self-crosslinking core-shell structure fluorocarbon emulsion
1.5-4 parts of film-forming assistant
0.1 to 0.5 portion of thickening and leveling agent
0.1-0.3 part of rheological additive.
Preferably, the aqueous wax slurry is polyamide wax micropowder slurry.
Preferably, the dispersant is an anionic polycarboxylic acid ammonium salt.
Preferably, the sterilization and mildew-proof agent is prepared by compounding BIT isothiazolinone, methyl-1H-benzimidazole-2-yl-carbamate vinegar and 3-iodine-2-propynyl-butyl carbamate vinegar according to the mass ratio of (3-5) to (1-2).
Preferably, the coalescing agent is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate.
Preferably, the wetting agent is one or more of C12-14 fatty alcohol polyoxyethylene ether or octyl phenol polyoxyethylene ether.
Preferably, the defoaming agent is one or more of silicon modified polyether, mineral oil and silicone.
Preferably, the fluorocarbon emulsion with the self-crosslinking core-shell structure is obtained by the following method: adding (45-55) parts by weight of deionized water, (1-3) parts by weight of Sodium Dodecyl Sulfate (SDS) and (1-3) parts by weight of octyl phenyl polyoxyethylene ether (OP-10) into a reaction kettle, heating to 82 ℃, and uniformly and fully emulsifying by stirring; dropwise adding (0.5-0.8) part of potassium sulfate as an initiator, (10-15) parts of Methyl Methacrylate (MMA), (3-5) parts of Butyl Acrylate (BA), (5-8) parts of dodecafluoroheptyl methacrylate (DFHM) and (2-5) parts of tetrafluoroethylene, performing seed emulsion polymerization, dropwise adding for 0.5h to complete, keeping the temperature for 0.5h, and cooling to below 30 ℃ at normal temperature to prepare seed emulsion; then continuously dripping (10-15) parts of Methyl Methacrylate (MMA), (3-5) parts of Butyl Acrylate (BA), (3-5) parts of methacrylic acid (MAA), (3-5) parts of hydroxypropyl methacrylate (HPMA) and (0.5-0.8) part of potassium sulfate as an initiator in 4h, heating to 90 ℃, polymerizing with the seed emulsion, curing for 4h, cooling to below 30 ℃ at normal temperature, and adjusting the pH value to 7-8 by using ammonia water to obtain the fluorocarbon emulsion with the self-crosslinking core-shell structure.
Preferably, the aluminum paste is coated water-based aluminum powder and is obtained by the following method: adding 50-60 parts by weight of absolute ethyl alcohol into a reaction kettle, stirring and adding 5-8 parts by weight of aluminum powder, stirring for 1 hour, heating to 40 ℃, stirring and adding 3-5 parts by weight of ammonia water and 5-8 parts by weight of water, simultaneously dropwise adding 10-13 parts by weight of Tetraethoxysilane (TEOS) diluted by ethanol to 5% and 8-10 parts by weight of Vinyltriethoxysilane (VTES) diluted by ethanol to 5%, wherein the dropwise adding time is 1 hour, continuously stirring the mixed solution for 6 hours, and forming a first coating through a sol-gel reaction; and heating to 82 ℃, simultaneously dropwise adding (5-8) parts of Methyl Methacrylate (MMA) diluted by ethanol to 5 percent and (6-10) parts of Acrylic Acid (AA) diluted by ethanol to 5 percent, dropwise adding (1-3) parts of N-methylpyrrolidone as a solvent and Azodiisobutyronitrile (AIBN) diluted by ethanol to 10 percent, stirring for 24 hours, washing with ethanol and water, and filtering for 3 times to obtain the coated waterborne aluminum powder.
Preferably, the reflective heat insulation raw material is prepared from superfine hollow ceramic particles with the average particle size of 50-100 nanometers and hollow glass beads with the average particle size of 50-80 nanometers according to the mass ratio of (2-3): (3-5) are compounded.
Preferably, the thickening and leveling agent is a hydrophobic group modified nonionic associative auxiliary agent.
Preferably, the rheological aid is a polyacrylamide thickener.
The invention also provides a preparation method of the water-based fluorocarbon metallic paint for the high-reflection external wall, which comprises the following specific steps:
(1) sequentially weighing and adding deionized water and aqueous wax slurry into a dispersion pot with a high-speed dispersion machine at a stirring speed of 350-550 r/min, uniformly stirring, and dispersing at a speed of 1300-1500 r/min for 20-30 min until the fineness is less than 60 microns;
(2) sequentially weighing the material prepared in the step (1) at a stirring speed of 350-550 revolutions per minute, adding a dispersing agent, a wetting agent, propylene glycol, an AMP-95 multifunctional agent (1/2), a defoaming agent and a sterilization and mildew preventive, fully and uniformly stirring, adding water-wetted aluminum powder slurry, reflecting heat insulation raw materials, uniformly stirring, and dispersing at a speed of 500-700 revolutions per minute for 5-10 minutes until the fineness of the mixture is less than 80 micrometers;
(3) and (3) sequentially weighing the materials prepared in the step (2) at a stirring speed of 350-550 r/min, adding the self-crosslinking core-shell structure fluorocarbon emulsion and the film-forming aid, uniformly stirring, and finally adding the AMP-95 multifunctional agent (1/2), the thickening and leveling agent and the rheological aid to adjust the viscosity to 70-90Ku (stormer viscometer) and the pH value to 9.
According to the invention, the ultrafine hollow ceramic particles and the nano hollow glass beads are matched with the coated water-based aluminum powder, so that the coating can reflect most of solar heat in visible light and near infrared regions, and an air microporous layer with extremely low heat conductivity coefficient is introduced into the coating to isolate the transfer of heat energy, and the decorative effect of metal flashing silver on the surface of the coating is not influenced. In order to prevent the influence of the coating on the firmness of the coating in the process of absorbing and releasing water molecules and moisture for a long time, the fluorocarbon emulsion with the self-crosslinking core-shell structure and excellent alkali resistance and water resistance is also used as a film forming material of the coating, the dosage of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate is reduced, the crosslinking density of the formed film of the coating is improved, and wetting, dispersing and thickening aids with excellent water resistance and environmental protection performance are adopted to further enhance the water resistance, stain resistance and scrubbing resistance of the coating and ensure that the wall surface is not loosened, does not fall off and does not fall off for a long time.
The invention develops a water-based fluorocarbon metallic paint for high-reflection external walls, which is prepared by selecting a proper reflection raw material and a specific aluminum powder in a matching manner, matching with a proper fluorocarbon emulsion and combining with an environment-friendly auxiliary agent, so that the paint has a high reflection effect, can reflect sunlight, reduces the surface temperature of the external wall exposed to solar radiation, has a good metal texture decoration effect, and has a lasting weather resistance and excellent stain resistance. The metallic paint takes water as a diluent, does not contain organic solvent, has few Volatile Organic Compounds (VOC), is harmless to human bodies, and does not pollute the environment.
Detailed Description
Example 1: preparing fluorocarbon emulsion with a self-crosslinking core-shell structure:
50g of deionized water, 0.8g of Sodium Dodecyl Sulfate (SDS) and 1.5g of octyl phenyl polyoxyethylene ether (OP-10) are added into a reaction kettle, heated to 82 ℃, and stirred uniformly and emulsified fully. 0.7g of initiator potassium sulfate, 11g of Methyl Methacrylate (MMA), 3g of Butyl Acrylate (BA), 4g of dodecafluoroheptyl methacrylate (DFHM) and 3g of tetrafluoroethylene are dripped into the mixture to carry out seed emulsion polymerization, the mixture is dripped for 0.5h, the temperature is kept for 0.5h, and the mixture is cooled to below 30 ℃ at normal temperature to prepare the seed emulsion. And then continuously dropwise adding 10g of Methyl Methacrylate (MMA), 4g of Butyl Acrylate (BA), 4g of methacrylic acid (MAA), 5g of hydroxypropyl methacrylate (HPMA) and 0.8g of potassium sulfate serving as an initiator in 4h, heating to 90 ℃, polymerizing with the seed emulsion, curing for 4h, cooling to below 30 ℃ at normal temperature, adjusting the pH value to 8 by using 2.5g of ammonia water, filtering and discharging for later use.
Example 2: preparing the coated water-based aluminum powder:
adding 55g of absolute ethyl alcohol into a reaction kettle, stirring and adding 5g of aluminum powder, stirring for 1h, heating to 40 ℃, stirring and adding 3g of ammonia water and 5g of water, simultaneously dropwise adding 10g of Tetraethoxysilane (TEOS) diluted by ethanol to 5% and 8g of Vinyl Triethoxysilane (VTES) diluted by ethanol to 5%, wherein the dropwise adding time is 1h, continuously stirring the mixed solution for 6h, and forming a first coating through a sol-gel reaction; then heating to 82 ℃, simultaneously dripping 6g of Methyl Methacrylate (MMA) diluted by ethanol to 5 percent and 8g of Acrylic Acid (AA) diluted by ethanol to 5 percent, dripping 1.5g of Azodiisobutyronitrile (AIBN) diluted by ethanol to 10 percent by using N-methylpyrrolidone as a solvent, stirring for 24 hours, washing by ethanol and water, filtering for 3 times, and drying in vacuum for later use.
Example 3: the water-based fluorocarbon metallic paint A for the high-reflection external wall:
in a dispersion pot with a high-speed dispersion machine, 20g of deionized water and 0.05g of aqueous wax slurry are sequentially weighed and added at a stirring speed of 350-550 r/min, uniformly stirred, then dispersed at a speed of 1300-1500 r/min for 25 minutes until the fineness is less than 60 micrometers, then 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor are sequentially weighed and added at a stirring speed of 350-550 r/min, 11g of aluminum powder slurry after water wetting and 12g of reflection and heat insulation raw material are added after fully and uniformly stirred, then dispersed at a speed of 500-700 r/min for 10 minutes until the fineness of the mixture is less than 80 micrometers, then 50g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film forming assistant are sequentially weighed and uniformly stirred, and finally 0.05g of AMP-95 multifunctional agent is added, 0.14g of thickening and leveling agent and 0.2g of rheological additive, the PH is adjusted to 9, and the viscosity is 90 Ku.
Example 4: the water-based fluorocarbon metallic paint B for the high-reflection external wall:
in a dispersion pot with a high-speed dispersion machine, 20g of deionized water and 0.05g of aqueous wax slurry are sequentially weighed and added at a stirring speed of 350-550 r/min, uniformly stirred, then dispersed at a speed of 1300-1500 r/min for 25 minutes until the fineness is less than 60 micrometers, and then sequentially weighed and added with 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor at a stirring speed of 350-550 r/min, after fully and uniformly stirred, 13g of aluminum powder slurry after being wetted by water and 10g of reflection and heat insulation raw material are added, after uniform stirring, dispersed at a speed of 500-700 r/min for 10 minutes until the fineness of the mixture is less than 80 micrometers, then 50g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film-forming auxiliary agent are sequentially weighed and uniformly stirred, and finally 0.05g of AMP-95 multifunctional, 0.14g of thickening and leveling agent and 0.2g of rheological additive, the PH is adjusted to 9, and the viscosity is 84 Ku.
Example 5: water-based fluorocarbon metallic paint C for high-reflection external wall
In a dispersion pot with a high-speed dispersion machine, 20g of deionized water and 0.05g of aqueous wax slurry are sequentially weighed and added at a stirring speed of 350-550 r/min, uniformly stirred, then dispersed at a speed of 1300-1500 r/min for 25 minutes until the fineness is less than 60 micrometers, then 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor are sequentially weighed and added at a stirring speed of 350-550 r/min, after fully and uniformly stirred, 15g of aluminum powder slurry after being wetted by water and 8g of reflection and heat insulation raw material are added, after uniform stirring, dispersed at a speed of 500-700 r/min for 10 minutes until the fineness of the mixture is less than 80 micrometers, 50g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film forming assistant are sequentially weighed and uniformly stirred, and finally 0.05g of AMP-95 multifunctional agent is added, 0.14g of thickening and leveling agent and 0.2g of rheological additive, and the pH is adjusted to 9, and the viscosity is 81 Ku.
Example 6: water-based fluorocarbon metallic paint D for high-reflection external wall
In a dispersion pot with a high-speed dispersion machine, 20g of deionized water and 0.05g of aqueous wax slurry are sequentially weighed and added at a stirring speed of 350-550 r/min, uniformly stirred, then dispersed at a speed of 1300-1500 r/min for 25 minutes until the fineness is less than 60 micrometers, then 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor are sequentially weighed and added at a stirring speed of 350-550 r/min, after fully and uniformly stirred, 17g of aluminum powder slurry after being wetted by water and 6g of reflection and heat insulation raw material are added, after uniform stirring, dispersed at a speed of 500-700 r/min for 10 minutes until the fineness of the mixture is less than 80 micrometers, 50g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film forming assistant are sequentially weighed and uniformly stirred, and finally 0.05g of AMP-95 multifunctional agent is added, 0.14g of thickening and leveling agent and 0.2g of rheological additive, and the pH is adjusted to 9, and the viscosity is 74 Ku.
Example 7: water-based fluorocarbon metallic paint E for high-reflection external wall
In a dispersion pot with a high-speed dispersion machine, sequentially weighing 15g of deionized water and 0.05g of aqueous wax slurry at a stirring speed of 350-550 r/min, uniformly stirring, dispersing for 25 minutes at a speed of 1300-1500 r/min until the fineness is less than 60 micrometers, sequentially weighing 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor at a stirring speed of 350-550 r/min, fully stirring uniformly, adding 15g of aluminum powder slurry after wetting with water and 8g of reflection and heat insulation raw material, uniformly stirring, dispersing for 10 minutes at a speed of 500-700 r/min until the fineness of the mixture is less than 80 micrometers, sequentially weighing 55g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film-forming auxiliary agent, uniformly stirring, and finally adding 0.05g of AMP-95 multifunctional agent, 0.14g of thickening and leveling agent and 0.2g of rheological additive, and the pH is adjusted to 9, and the viscosity is 75 Ku.
Example 8: water-based fluorocarbon metallic paint F for high-reflection external wall
In a dispersion pot with a high-speed dispersion machine, 20g of deionized water and 0.02g of aqueous wax slurry are sequentially weighed and added at a stirring speed of 350-550 r/min, uniformly stirred, then dispersed at a speed of 1300-1500 r/min for 25 minutes until the fineness is less than 60 microns, then 1g of dispersing agent, 0.06g of wetting agent, 2.6g of propylene glycol, 0.05g of AMP-95 multifunctional agent, 0.2g of defoaming agent and 0.15g of sterilization and mildew inhibitor are sequentially weighed and added at a stirring speed of 350-550 r/min, after fully and uniformly stirred, 15g of aluminum powder slurry after being wetted by water and 8g of reflection and heat insulation raw material are added, after uniform stirring, dispersed at a speed of 500-700 r/min for 10 minutes until the fineness of the mixture is less than 80 microns, 50g of fluorocarbon emulsion with a self-crosslinking core-shell structure, 2.5g of film forming assistant are sequentially weighed and uniformly stirred, and finally 0.05g of AMP-95 multifunctional agent is added, 0.14g of thickening and leveling agent and 0.23g of rheological additive, and the pH is adjusted to 9, and the viscosity is 83 Ku.
The performance test results of the aqueous fluorocarbon metallic paint for high-reflection external walls prepared in the above examples 3 to 8 are as follows.
Claims (9)
1. The water-based fluorocarbon metallic paint for the high-reflection external wall is characterized in that: the composition comprises the following components in parts by weight:
20-25 parts of deionized water
0.02-0.1 part of water-based wax slurry
0.2 to 0.5 portion of dispersant
0.05 to 0.1 portion of wetting agent
1-3 parts of propylene glycol
0.1-0.2 part of AMP-95 multifunctional agent
0.2 to 0.5 portion of defoaming agent
0.1-0.2 part of sterilization and mildew-proof agent
10-15 parts of aluminum paste
5-10 parts of reflective heat-insulating raw material
45-55 parts of self-crosslinking core-shell structure fluorocarbon emulsion
1.5-4 parts of film-forming assistant
0.1 to 0.5 portion of thickening and leveling agent
0.1-0.3 part of rheological additive.
2. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the fluorocarbon emulsion with the self-crosslinking core-shell structure is obtained by the following method: adding (45-55) parts by weight of deionized water, (1-3) parts by weight of Sodium Dodecyl Sulfate (SDS) and (1-3) parts by weight of octyl phenyl polyoxyethylene ether (OP-10) into a reaction kettle, heating to 82 ℃, and uniformly and fully emulsifying by stirring; dropwise adding (0.5-0.8) part of potassium sulfate as an initiator, (10-15) parts of Methyl Methacrylate (MMA), (3-5) parts of Butyl Acrylate (BA), (5-8) parts of dodecafluoroheptyl methacrylate (DFHM) and (2-5) parts of tetrafluoroethylene, performing seed emulsion polymerization, dropwise adding for 0.5h to complete, keeping the temperature for 0.5h, and cooling to below 30 ℃ at normal temperature to prepare seed emulsion; then continuously dripping (10-15) parts of Methyl Methacrylate (MMA), (3-5) parts of Butyl Acrylate (BA), (3-5) parts of methacrylic acid (MAA), (3-5) parts of hydroxypropyl methacrylate (HPMA) and (0.5-0.8) part of potassium sulfate as an initiator in 4h, heating to 90 ℃, polymerizing with the seed emulsion, curing for 4h, cooling to below 30 ℃ at normal temperature, and adjusting the pH value to 7-8 by using ammonia water to obtain the fluorocarbon emulsion with the self-crosslinking core-shell structure.
3. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the aluminum paste is coated water-based aluminum powder and is obtained by the following method: adding 50-60 parts by weight of absolute ethyl alcohol into a reaction kettle, stirring and adding 5-8 parts by weight of aluminum powder, stirring for 1 hour, heating to 40 ℃, stirring and adding 3-5 parts by weight of ammonia water and 5-8 parts by weight of water, simultaneously dropwise adding 10-13 parts by weight of Tetraethoxysilane (TEOS) diluted by ethanol to 5% and 8-10 parts by weight of Vinyltriethoxysilane (VTES) diluted by ethanol to 5%, wherein the dropwise adding time is 1 hour, continuously stirring the mixed solution for 6 hours, and forming a first coating through a sol-gel reaction; and heating to 82 ℃, simultaneously dropwise adding (5-8) parts of Methyl Methacrylate (MMA) diluted by ethanol to 5 percent and (6-10) parts of Acrylic Acid (AA) diluted by ethanol to 5 percent, dropwise adding (1-3) parts of N-methylpyrrolidone as a solvent and Azodiisobutyronitrile (AIBN) diluted by ethanol to 10 percent, stirring for 24 hours, washing with ethanol and water, and filtering for 3 times to obtain the coated waterborne aluminum powder.
4. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the reflective heat insulation raw material comprises the following components in percentage by mass (2-3): (3-5) are compounded.
5. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the sterilization mildew inhibitor is prepared by compounding BIT isothiazolinone, methyl-1H-benzimidazole-2-yl-carbamic acid vinegar and 3-iodine-2-propynyl-butyl carbamic acid vinegar in a mass ratio of (3-5) to (1-2).
6. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the wetting agent is one or a combination of more of C12-14 fatty alcohol polyoxyethylene ether or octyl phenol polyoxyethylene ether.
7. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the defoaming agent is one or a combination of silicon modified polyether, mineral oil and silicone.
8. The water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claim 1, wherein: the aqueous wax slurry is polyamide wax micro powder slurry, the dispersing agent is anionic polycarboxylate ammonium salt, the film forming auxiliary agent is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, the thickening and leveling agent is hydrophobic group modified nonionic associative auxiliary agent, and the rheological auxiliary agent is polyacrylamide thickener.
9. The method for preparing the water-based fluorocarbon metallic paint for high-reflection exterior walls as claimed in claims 1 to 8, wherein: the method comprises the following specific steps:
(1) sequentially weighing and adding deionized water and aqueous wax slurry into a dispersion pot with a high-speed dispersion machine at a stirring speed of 350-550 r/min, uniformly stirring, and dispersing at a speed of 1300-1500 r/min for 20-30 min until the fineness is less than 60 microns;
(2) sequentially weighing the material prepared in the step (1) at a stirring speed of 350-550 revolutions per minute, adding a dispersing agent, a wetting agent, propylene glycol, an AMP-95 multifunctional agent (1/2), a defoaming agent and a sterilization and mildew preventive, fully and uniformly stirring, adding water-wetted aluminum powder slurry, reflecting heat insulation raw materials, uniformly stirring, and dispersing at a speed of 500-700 revolutions per minute for 5-10 minutes until the fineness of the mixture is less than 80 micrometers;
(3) and (3) sequentially weighing the materials prepared in the step (2) at a stirring speed of 350-550 r/min, adding the self-crosslinking core-shell structure fluorocarbon emulsion and the film-forming aid, uniformly stirring, and finally adding the AMP-95 multifunctional agent (1/2), the thickening and leveling agent and the rheological aid to adjust the viscosity to 70-90Ku (stormer viscometer) and the pH value to 9.
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| CN201911134482.9A CN110885606A (en) | 2019-11-19 | 2019-11-19 | Water-based fluorocarbon metallic paint for high-reflection external wall and preparation method thereof |
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Application publication date: 20200317 |