CN112592625A - Preparation method of reflective heat-insulation heat-preservation composite building coating - Google Patents
Preparation method of reflective heat-insulation heat-preservation composite building coating Download PDFInfo
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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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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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
- C09D5/1687—Use of special additives
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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
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention relates to a preparation method of a reflective heat-insulation heat-preservation composite building coating, belonging to the technical field of building coatings. The reflective heat-insulation composite building coating is prepared by adding the silica sol, the lignin fiber and the hollow glass microspheres, the lignin fiber has good toughness, can form a three-dimensional network structure with a polymer after being mixed, can improve the physical and chemical stability, the strength, the compactness and the uniformity of the coating, the organic polymer in the lignin fiber can be filled in the silica sol-Si-O-Si-network structure, reduces the shrinkage and the expansion and shrinkage change caused by temperature difference in the film forming process, the absorption degree of the silica sol to sunlight after film forming is lower than that of the organic polymer, can improve the heat-insulation performance, the weather resistance and the durability of the coating, the hollow glass microspheres can endow the coating with good reflective light and heat radiation effects, a layer of hollow cavity group consisting of thin-wall hollow beads can be formed in the coating, and a good heat-insulation effect can be achieved, thereby improving the heat insulation of the coating film.
Description
Technical Field
The invention relates to a preparation method of a reflective heat-insulation heat-preservation composite building coating, belonging to the technical field of building coatings.
Background
Most of coatings sold in the market at present are water-based organic coatings, and most of the existing reflective heat-insulating coatings are organic high-molecular polymers, and the coatings are degraded after being irradiated by sunlight for a long time, so that the weather resistance and the durability of the coatings are deteriorated. In addition, various additives containing volatile organic compounds are added to improve the performance of the coating, and the volatile organic solvents pollute the environment. In addition, the organic coating has a short service life, generally 5 to 10 years.
The building heat-insulating coating has the functions of decorating and protecting walls, and can effectively reduce the temperature of the surface and the inside of a building and reduce the heat accumulation of the wall surface in the modes of blocking, reflecting, radiating and the like so as to achieve the effect of saving the energy consumption of the building, so that the development of the reflecting building heat-insulating coating has important significance for saving energy, protecting the environment and creating the harmonious relationship between people and nature.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problem that the organic high molecular polymer is degraded after being irradiated by sunlight for a long time, so that the weather resistance and durability of the coating are deteriorated, the preparation method of the reflective heat-insulation heat-preservation composite building coating is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
(1) adding polyethylene glycol, sodium carboxymethylcellulose, glycerol, calcium stearate and sodium dodecyl benzene sulfonate into deionized water, and stirring at the rotating speed of 200-240 r/min for 15-20 min at normal temperature to obtain a polymer dispersion liquid;
(2) placing the talcum powder, the hollow glass microspheres, the lignin fiber powder and the nano titanium dioxide into a stirrer, and stirring at the normal temperature at the rotating speed of 500-600 r/min for 20-30 min to obtain a solid mixture;
(3) adding the solid mixture and the composite base material into the polymer dispersion liquid, placing the mixture into a high-shear emulsifying machine, stirring the mixture for 40-60 min at the normal temperature at the rotating speed of 10000-12000 r/min, then placing the mixture into an ultrasonic dispersing machine, and carrying out ultrasonic treatment for 10-20 min at the normal temperature to obtain the reflective heat-insulating composite building coating.
The composite base material comprises, by weight, 30-40 parts of composite base material, 10-15 parts of silica sol, 5-10 parts of talcum powder, 5-10 parts of hollow glass microspheres, 5-10 parts of lignin fiber powder, 10-20 parts of nano titanium dioxide, 2-3 parts of polyethylene glycol, 0.5-1.5 parts of sodium carboxymethyl cellulose, 0.2-0.3 part of glycerol, 0.4-0.6 part of calcium stearate, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 60-80 parts of deionized water.
And (4) the power of ultrasonic treatment in the step (3) is 500-600W.
The specific preparation steps of the composite base material in the step (3) are as follows:
(1) adding metakaolin powder and sodium silicate into deionized water, placing the mixture into a high-speed stirrer, and stirring the mixture for 20-30 min at the rotating speed of 800-1000 r/min at normal temperature to obtain mixed slurry;
(2) adding the mixed slurry into styrene-acrylic emulsion, placing the mixture into a planetary ball mill, and carrying out ball milling for 1-2 h at the normal temperature at the rotating speed of 240-280 r/min to obtain a mixed emulsion material;
(3) and (3) placing the mixed emulsion material in an ultrasonic dispersion machine, and performing ultrasonic treatment for 20-30 min at normal temperature to obtain the composite base material.
The weight parts of the metakaolin powder, the sodium silicate, the deionized water and the styrene-acrylic emulsion are 5-10 parts of the metakaolin powder, 10-20 parts of the sodium silicate, 20-40 parts of the deionized water and 15-30 parts of the styrene-acrylic emulsion.
And (4) the power of ultrasonic treatment in the step (3) is 300-400W.
The metakaolin powder prepared in the step (1) comprises the following specific preparation steps:
(1) placing kaolin powder, silicon dioxide powder and calcium carbonate powder in a high-speed stirrer, and stirring at the rotating speed of 600-800 r/min for 15-20 min at normal temperature to obtain a kaolin mixture;
(2) placing the kaolin mixture in a muffle furnace, heating to 800-900 ℃ from normal temperature, carrying out heat preservation and calcination for 1-2 h, and cooling to room temperature along with the furnace to obtain metakaolin;
(3) and (3) placing the metakaolin into a planetary ball mill, ball-milling for 2-4 h at the normal temperature at the rotating speed of 180-200 r/min, and sieving to obtain metakaolin powder.
The kaolin powder, the silicon dioxide powder and the calcium carbonate powder are 50-60 parts by weight of the kaolin powder, 5-6 parts by weight of the silicon dioxide powder and 0.5-0.6 part by weight of the calcium carbonate powder.
The heating rate in the step (2) is 10 ℃/min.
The average particle size of the metakaolin powder in the step (3) is 60-70 μm.
Compared with other methods, the method has the beneficial technical effects that:
(1) according to the invention, the reflective heat-insulation composite building coating is prepared by adding silica sol and lignin fiber, the toughness of the lignin fiber is good, the lignin fiber can form a three-dimensional network structure with a polymer in the coating after being mixed, the physical and chemical stability, strength, compactness and uniformity of the coating are improved, and the reflection of the coating can be enhanced to the greatest extent; the silica sol is a dispersion of nano-scale silica in water or solvent, the silica in the silica sol contains a large amount of water and has the characteristics of no odor, no toxicity, low viscosity, large specific surface area and strong adsorbability, the lignin fiber and the silica sol are compounded, and the organic polymer in the lignin fiber can be filled in a-Si-O-Si-network structure, so that the shrinkage and the expansion and contraction change caused by temperature difference in the film forming process are reduced The absorption groups such as-C-O-C and-OH, etc. only have stronger absorption at the characteristic absorption peak of-Si-O after the silica sol film is formed, and the absorption degree of the silica sol film and sunlight is lower than that of the organic polymer after the organic polymer film is formed because the organic polymer film has stronger absorption at the characteristic absorption peak of groups such as-C = O, -C-O-C and-OH, etc., thereby improving the heat insulation performance, weather resistance and durability of the coating.
According to the invention, the hollow glass microspheres are added to prepare the reflective thermal insulation composite building coating, the hollow glass microspheres have very small density and extremely low thermal conductivity coefficient and are functional fillers, the hollow glass microspheres are round spheres with smooth surfaces, the specific surface area is small, the oil absorption is low, and the hollow glass microspheres are added to the building coating, so that the coating can have good light and heat radiation reflection effects, a layer of hollow cavity group consisting of thin-wall hollow beads can be formed in a coating film, and a good thermal insulation blocking effect is achieved, thereby improving the thermal insulation property of the coating film.
Detailed Description
Respectively weighing 50-60 parts of kaolin powder, 5-6 parts of silicon dioxide powder and 0.5-0.6 part of calcium carbonate powder according to parts by weight, placing the kaolin powder, the silicon dioxide powder and the calcium carbonate powder in a high-speed stirrer, stirring for 15-20 min at the normal temperature at the rotating speed of 600-800 r/min to obtain a kaolin mixture, placing the kaolin mixture in a muffle furnace, heating to 800-900 ℃ from the normal temperature at the speed of 10 ℃/min, carrying out heat preservation and calcination for 1-2 h, cooling to the room temperature along with the furnace to obtain metakaolin, placing the metakaolin in a planetary ball mill, carrying out ball milling for 2-4 h at the rotating speed of 180-200 r/min at the normal temperature, and sieving to obtain the metakaolin powder with the average particle size of 60-70 mu m.
Then, respectively weighing 5-10 parts by weight of metakaolin powder, 10-20 parts by weight of sodium silicate, 20-40 parts by weight of deionized water and 15-30 parts by weight of styrene-acrylic emulsion, adding the metakaolin powder and the sodium silicate into the deionized water, placing the mixture into a high-speed stirrer, stirring the mixture for 20-30 min at the normal temperature at the rotating speed of 800-1000 r/min to obtain mixed slurry, adding the mixed slurry into the styrene-acrylic emulsion, placing the mixture into a planetary ball mill, ball-milling the mixture for 1-2 h at the normal temperature at the rotating speed of 240-280 r/min to obtain mixed emulsion, placing the mixed emulsion into an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 20-30 min at the normal temperature at the power of 300-400W to obtain the composite base material.
Respectively weighing 30-40 parts of composite base material, 10-15 parts of silica sol, 5-10 parts of talcum powder, 5-10 parts of hollow glass microspheres, 5-10 parts of lignin fiber powder, 10-20 parts of nano titanium dioxide, 2-3 parts of polyethylene glycol, 0.5-1.5 parts of sodium carboxymethylcellulose, 0.2-0.3 part of glycerol, 0.4-0.6 part of calcium stearate, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 60-80 parts of deionized water, adding the polyethylene glycol, the sodium carboxymethyl cellulose, the glycerol, the calcium stearate and the sodium dodecyl benzene sulfonate into the deionized water, stirring at the normal temperature at the rotating speed of 200-240 r/min for 15-20 min to obtain polymer dispersion liquid, placing the talcum powder, the hollow glass microspheres, the lignin fiber powder and the nano titanium dioxide into a stirrer, stirring at the normal temperature at the rotating speed of 500-600 r/min for 20-30 min to obtain a solid mixture, adding the solid mixture and the composite base material into the polymer dispersion liquid, placing the polymer dispersion liquid into a high-shear emulsifying machine, stirring the polymer dispersion liquid for 40-60 min at the rotation speed of 10000-12000 r/min at normal temperature, then placing the polymer dispersion liquid into an ultrasonic dispersing machine, and carrying out ultrasonic treatment for 10-20 min at the power of 500-600W at normal temperature to obtain the reflective heat-insulating composite building coating.
Example 1
Respectively weighing 50 parts of kaolin powder, 5 parts of silicon dioxide powder and 0.5 part of calcium carbonate powder according to parts by weight, placing the kaolin powder, the silicon dioxide powder and the calcium carbonate powder in a high-speed stirrer, stirring for 15min at the normal temperature at the rotating speed of 600r/min to obtain a kaolin mixture, placing the kaolin mixture in a muffle furnace, heating to 800 ℃ from the normal temperature at the speed of 10 ℃/min, carrying out heat preservation and calcination for 1h, cooling to the room temperature along with the furnace to obtain metakaolin, placing the metakaolin in a planetary ball mill, carrying out ball milling for 2h at the normal temperature at the rotating speed of 180r/min, and sieving to obtain the metakaolin powder with the average particle size of 60 mu m.
Respectively weighing 5 parts of metakaolin powder, 10 parts of sodium silicate, 20 parts of deionized water and 15 parts of styrene-acrylic emulsion according to parts by weight, adding the metakaolin powder and the sodium silicate into the deionized water, placing the mixture into a high-speed stirrer, stirring the mixture for 20min at the normal temperature at the rotating speed of 800r/min to obtain mixed slurry, adding the mixed slurry into the styrene-acrylic emulsion, placing the mixture into a planetary ball mill, ball-milling the mixture for 1h at the normal temperature at the rotating speed of 240r/min to obtain mixed emulsion, placing the mixed emulsion into an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 20min at the normal temperature at the power of 300W to obtain the composite base material.
Respectively weighing 30 parts of composite base material, 10 parts of silica sol, 5 parts of talcum powder, 5 parts of hollow glass microsphere, 5 parts of lignin fiber powder, 10 parts of nano titanium dioxide, 2 parts of polyethylene glycol, 0.5 part of sodium carboxymethylcellulose, 0.2 part of glycerol, 0.4 part of calcium stearate, 0.1 part of sodium dodecyl benzene sulfonate and 60 parts of deionized water, adding the polyethylene glycol, the sodium carboxymethylcellulose, the glycerol, the calcium stearate and the sodium dodecyl benzene sulfonate into the deionized water, stirring at the normal temperature at the rotating speed of 200r/min for 15min to obtain polymer dispersion liquid, placing the talcum powder, the hollow glass microsphere, the lignin fiber powder and the nano titanium dioxide into a stirrer, stirring at the normal temperature at the rotating speed of 500r/min for 20min to obtain solid mixture, adding the solid mixture and the composite base material into the polymer dispersion liquid, placing into a high-shear emulsifying machine, stirring at 10000r/min for 40min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment at 500W for 10min at normal temperature to obtain the reflective heat-insulating composite architectural coating.
Example 2
Respectively weighing 55 parts of kaolin powder, 5.5 parts of silicon dioxide powder and 0.55 part of calcium carbonate powder according to parts by weight, placing the kaolin powder, the silicon dioxide powder and the calcium carbonate powder in a high-speed stirrer, stirring for 17min at the normal temperature at the rotating speed of 700r/min to obtain a kaolin mixture, placing the kaolin mixture in a muffle furnace, heating to 850 ℃ at the speed of 10 ℃/min, carrying out heat preservation and calcination for 1.5h, cooling to the room temperature along with the furnace to obtain metakaolin, placing the metakaolin in a planetary ball mill, carrying out ball milling for 3h at the normal temperature at the rotating speed of 190r/min, and sieving to obtain the metakaolin powder with the average particle size of 65 mu m.
Respectively weighing 7 parts of metakaolin powder, 15 parts of sodium silicate, 30 parts of deionized water and 27 parts of styrene-acrylic emulsion according to parts by weight, adding the metakaolin powder and the sodium silicate into the deionized water, placing the mixture into a high-speed stirrer, stirring the mixture for 30min at the normal temperature at the rotating speed of 900r/min to obtain mixed slurry, adding the mixed slurry into the styrene-acrylic emulsion, placing the mixture into a planetary ball mill, ball-milling the mixture for 1.5h at the normal temperature at the rotating speed of 260r/min to obtain mixed emulsion, placing the mixed emulsion into an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 25min at the normal temperature at the power of 350W to obtain the composite base material.
Respectively weighing 35 parts of composite base material, 12.5 parts of silica sol, 7 parts of talcum powder, 7 parts of hollow glass microspheres, 7 parts of lignin fiber powder, 15 parts of nano titanium dioxide, 2.5 parts of polyethylene glycol, 1 part of sodium carboxymethylcellulose, 0.25 part of glycerol, 0.5 part of calcium stearate, 0.15 part of sodium dodecyl benzene sulfonate and 70 parts of deionized water, adding the polyethylene glycol, the sodium carboxymethylcellulose, the glycerol, the calcium stearate and the sodium dodecyl benzene sulfonate into the deionized water, stirring at the normal temperature at the rotating speed of 220r/min for 17min to obtain polymer dispersion liquid, placing the talcum powder, the hollow glass microspheres, the lignin fiber powder and the nano titanium dioxide into a stirrer, stirring at the normal temperature at the rotating speed of 550r/min for 25min to obtain solid mixture, adding the solid mixture and the composite base material into the polymer dispersion liquid, placing into a high-shear emulsifying machine, stirring the mixture for 50min at the normal temperature at the rotating speed of 11000r/min, then placing the mixture in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 15min at the normal temperature at the power of 550W to obtain the reflective heat-insulating composite architectural coating.
Example 3
Respectively weighing 60 parts of kaolin powder, 6 parts of silicon dioxide powder and 0.6 part of calcium carbonate powder according to parts by weight, placing the kaolin powder, the silicon dioxide powder and the calcium carbonate powder in a high-speed stirrer, stirring at the normal temperature at the rotating speed of 800r/min for 20min to obtain a kaolin mixture, placing the kaolin mixture in a muffle furnace, heating to 900 ℃ from the normal temperature at the speed of 10 ℃/min, carrying out heat preservation and calcination for 2h, cooling to the room temperature along with the furnace to obtain metakaolin, placing the metakaolin in a planetary ball mill, carrying out ball milling at the normal temperature at the rotating speed of 200r/min for 4h, and sieving to obtain the metakaolin powder with the average particle size of 70 mu m.
Respectively weighing 10 parts of metakaolin powder, 20 parts of sodium silicate, 40 parts of deionized water and 30 parts of styrene-acrylic emulsion according to parts by weight, adding the metakaolin powder and the sodium silicate into the deionized water, placing the mixture into a high-speed stirrer, stirring the mixture for 30min at the normal temperature at the rotating speed of 1000r/min to obtain mixed slurry, adding the mixed slurry into the styrene-acrylic emulsion, placing the mixture into a planetary ball mill, ball-milling the mixture for 2h at the rotating speed of 280r/min at the normal temperature to obtain mixed emulsion, placing the mixed emulsion into an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 30min at the normal temperature at the power of 400W to obtain the composite base material.
Respectively weighing 40 parts of composite base material, 15 parts of silica sol, 10 parts of talcum powder, 10 parts of hollow glass microsphere, 10 parts of lignin fiber powder, 20 parts of nano titanium dioxide, 3 parts of polyethylene glycol, 1.5 parts of sodium carboxymethylcellulose, 0.3 part of glycerol, 0.6 part of calcium stearate, 0.2 part of sodium dodecyl benzene sulfonate and 80 parts of deionized water, adding the polyethylene glycol, the sodium carboxymethylcellulose, the glycerol, the calcium stearate and the sodium dodecyl benzene sulfonate into the deionized water, stirring at the normal temperature at the rotating speed of 240r/min for 20min to obtain polymer dispersion liquid, placing the talcum powder, the hollow glass microsphere, the lignin fiber powder and the nano titanium dioxide into a stirrer, stirring at the normal temperature at the rotating speed of 600r/min for 30min to obtain solid mixture, adding the solid mixture and the composite base material into the polymer dispersion liquid, placing into a high-shear emulsifying machine, stirring the mixture for 60min at the rotating speed of 12000r/min at normal temperature, then placing the mixture in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 20min at the power of 600W at normal temperature to obtain the reflective heat-insulating composite architectural coating.
Comparative example: reflective thermal insulation coating produced by Fujian company.
The reflective heat-insulation composite building coating prepared by the invention and the reflective heat-insulation coating produced by Fujian company are detected, and the detection method comprises the following steps: the coating adhesion grade of the reflective heat-insulating coating is determined according to GB9286 marking test of colored paint and varnish paint film, and the impact resistance test of the reflective heat-insulating coating is performed according to national standard GB/T1732 impact resistance determination method of paint film, and the specific detection results are shown in the following table 1:
TABLE 1
| Performance characterization | Example 1 | Example 2 | Example 3 | Comparative example |
| Adhesion rating | 0A | 1A | 0A | 5B |
| Impact Strength (kg. cm) | 50 | 50 | 50 | 35 |
As can be seen from Table 1, the coating prepared from the reflective thermal insulation composite building coating prepared by the invention has strong impact resistance and good adhesion, is an excellent building coating, and has excellent market prospect and application prospect.
Claims (10)
1. A preparation method of a reflective heat-insulation heat-preservation composite building coating is characterized by comprising the following specific preparation steps:
(1) adding polyethylene glycol, sodium carboxymethylcellulose, glycerol, calcium stearate and sodium dodecyl benzene sulfonate into deionized water, and stirring at the rotating speed of 200-240 r/min for 15-20 min at normal temperature to obtain a polymer dispersion liquid;
(2) placing the talcum powder, the hollow glass microspheres, the lignin fiber powder and the nano titanium dioxide into a stirrer, and stirring at the normal temperature at the rotating speed of 500-600 r/min for 20-30 min to obtain a solid mixture;
(3) adding the solid mixture and the composite base material into the polymer dispersion liquid, placing the mixture into a high-shear emulsifying machine, stirring the mixture for 40-60 min at the normal temperature at the rotating speed of 10000-12000 r/min, then placing the mixture into an ultrasonic dispersing machine, and carrying out ultrasonic treatment for 10-20 min at the normal temperature to obtain the reflective heat-insulating composite building coating.
2. The preparation method of the reflective thermal insulation composite building coating as claimed in claim 1, wherein the weight parts of the composite base material, the silica sol, the talcum powder, the hollow glass microspheres, the lignin fiber powder, the nano titanium dioxide, the polyethylene glycol, the sodium carboxymethyl cellulose, the glycerol, the calcium stearate, the sodium dodecyl benzene sulfonate and the deionized water are 30-40 parts of the composite base material, 10-15 parts of the silica sol, 5-10 parts of the talcum powder, 5-10 parts of the hollow glass microspheres, 5-10 parts of the lignin fiber powder, 10-20 parts of the nano titanium dioxide, 2-3 parts of the polyethylene glycol, 0.5-1.5 parts of the sodium carboxymethyl cellulose, 0.2-0.3 part of the glycerol, 0.4-0.6 part of the calcium stearate, 0.1-0.2 part of the sodium dodecyl benzene sulfonate and 60-80 parts of the deionized water.
3. The preparation method of the reflective thermal insulation composite building coating according to claim 1, wherein the power of the ultrasonic treatment in the step (3) is 500-600W.
4. The preparation method of the reflective thermal insulation composite building coating as claimed in claim 1, wherein the concrete preparation steps of the composite base material in the step (3) are as follows:
(1) adding metakaolin powder and sodium silicate into deionized water, placing the mixture into a high-speed stirrer, and stirring the mixture for 20-30 min at the rotating speed of 800-1000 r/min at normal temperature to obtain mixed slurry;
(2) adding the mixed slurry into styrene-acrylic emulsion, placing the mixture into a planetary ball mill, and carrying out ball milling for 1-2 h at the normal temperature at the rotating speed of 240-280 r/min to obtain a mixed emulsion material;
(3) and (3) placing the mixed emulsion material in an ultrasonic dispersion machine, and performing ultrasonic treatment for 20-30 min at normal temperature to obtain the composite base material.
5. The preparation method of the reflective thermal insulation composite building coating as claimed in claim 4, wherein the parts by weight of the metakaolin powder, the sodium silicate, the deionized water and the styrene-acrylic emulsion are 5-10 parts of the metakaolin powder, 10-20 parts of the sodium silicate, 20-40 parts of the deionized water and 15-30 parts of the styrene-acrylic emulsion.
6. The preparation method of the reflective thermal insulation composite building coating according to claim 4, wherein the power of the ultrasonic treatment in the step (3) is 300-400W.
7. The preparation method of the reflective thermal insulation composite building coating according to claim 4, wherein the metakaolin powder in the step (1) is prepared by the following steps:
(1) placing kaolin powder, silicon dioxide powder and calcium carbonate powder in a high-speed stirrer, and stirring at the rotating speed of 600-800 r/min for 15-20 min at normal temperature to obtain a kaolin mixture;
(2) placing the kaolin mixture in a muffle furnace, heating to 800-900 ℃ from normal temperature, carrying out heat preservation and calcination for 1-2 h, and cooling to room temperature along with the furnace to obtain metakaolin;
(3) and (3) placing the metakaolin into a planetary ball mill, ball-milling for 2-4 h at the normal temperature at the rotating speed of 180-200 r/min, and sieving to obtain metakaolin powder.
8. The preparation method of the reflective thermal insulation composite architectural coating according to claim 7, wherein the kaolin powder, the silicon dioxide powder and the calcium carbonate powder are 50-60 parts by weight of kaolin powder, 5-6 parts by weight of silicon dioxide powder and 0.5-0.6 part by weight of calcium carbonate powder.
9. The preparation method of the reflective thermal insulation composite architectural coating according to claim 7, wherein the temperature rise rate in the step (2) is 10 ℃/min.
10. The preparation method of the reflective thermal insulation composite building coating according to claim 7, wherein the metakaolin powder in the step (3) has an average particle size of 60-70 μm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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