CN115286983B - Thermal insulation coating for building outer wall - Google Patents
Thermal insulation coating for building outer wall Download PDFInfo
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- CN115286983B CN115286983B CN202211116286.0A CN202211116286A CN115286983B CN 115286983 B CN115286983 B CN 115286983B CN 202211116286 A CN202211116286 A CN 202211116286A CN 115286983 B CN115286983 B CN 115286983B
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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
Abstract
The invention discloses a heat preservation and insulation coating for an external wall of a building, which comprises the following raw materials in parts by weight: 20-28 parts of alkyd resin, 14-22 parts of styrene-acrylic emulsion, 12-18 parts of water, 12-16 parts of talcum powder, 12-18 parts of temperature-control filler, 4-6 parts of film-forming auxiliary agent, 1.8-2.4 parts of thickener, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent and 0.1-0.2 part of defoaming agent. The phase-change material heat-insulating paint is added to realize bidirectional heat exchange, so that the dynamic temperature regulation is realized, and the heat-insulating paint has excellent heat-insulating effect.
Description
Technical Field
The invention relates to the technical field of building coatings, in particular to a heat preservation and insulation coating for building outer walls.
Background
Building operations account for 36% of the total energy consumption worldwide and about 40% of the carbon dioxide emissions associated with energy. With population growth, family size change, financial level improvement and lifestyle improvement, energy consumption in developing countries may double or triple in the next 30 years. Accordingly, there is increasing interest in low energy buildings, which can be defined as references to achieve a balance between the necessity of building energy and self-sufficiency. The heat insulation design of the building enclosure structure needs to consider the climate, the cooling and heating balance requirement and the relative cost, so that a method for improving the heat insulation performance of the building outer wall is very important.
Patent CN 103773131A discloses a heat-insulating coating, which uses rock wool, expanded perlite and sericite powder as fillers to increase the heat-insulating performance and thermal stability of the coating, but has the defect of poor hydrophobicity in practical use. Patent CN 104830205A provides a heat-insulating coating, a preparation method and application thereof, and the heat-insulating coating uses a vacuum material to reduce the thickness of a coating film, limit the pore size to nano-scale, so as to eliminate air convection, reduce heat conduction and convection, and improve the heat-insulating effect of the heat-insulating coating, however, in practical application, only unidirectional heat isolation can be realized, and dynamic temperature adjustment is difficult to realize.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: (1) The heat insulation performance of the coating is improved, and the heat loss of the wall is reduced; (2) Adding phase change materials into the paint, realizing bidirectional heat exchange to achieve the dynamic temperature regulation function; (3) The technical problems of poor dispersibility, poor stability and easy leakage of the phase change material in the application of the coating are solved, and the hydrophobic property of the coating is improved.
The traditional heat insulation principle of the building coating achieves the aim of reducing heat loss by reducing the heat conductivity coefficient of the coating and improving the heat resistance of the coating, and the coating prepared by using the principle can only one-way slow down the heat loss and has certain limitation in practical use.
The inventor finds that the phase change material introduced into the heat preservation coating for the outer wall has wide application prospect in the aspects of temperature regulation and heat storage, and the heat preservation coating added with the phase change material can realize bidirectional heat exchange, so that the dynamic regulation of temperature is achieved. The coating has low heat conductivity coefficient and high coating heat resistance, and also has higher phase change latent heat, can absorb part of heat and store in the phase change material when the outdoor temperature is high in daytime, and can release heat when the outdoor temperature is low at night, so that the indoor temperature is kept in a comfortable range, and the effect of dynamic temperature control is achieved.
The invention provides a heat preservation and insulation coating for an external wall of a building, which comprises the following raw materials in parts by weight: 20-28 parts of alkyd resin, 14-22 parts of styrene-acrylic emulsion, 12-18 parts of water, 12-16 parts of talcum powder, 12-18 parts of temperature-control filler, 4-6 parts of film-forming additive, 1.8-2.4 parts of thickener, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent and 0.1-0.2 part of defoaming agent.
Preferably, the talcum powder has a particle size of 800-1250 meshes.
Preferably, the film forming additive is any one of propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether and propylene glycol phenyl ether.
Preferably, the thickener is any one of hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose and hydroxypropyl cellulose.
Preferably, the wetting agent is any one of glycerol, ethanol, propylene glycol and dimethyl sulfoxide.
Preferably, the dispersing agent is any one of sodium dodecyl benzene sulfonate, fatty acid sulfoalkyl ester, fatty acid sulfoalkyl amide and dibutyl sodium naphthalene sulfonate.
Preferably, the defoaming agent is any one of an organic silicon defoaming agent, a polyether defoaming agent and a polyether modified polysiloxane defoaming agent.
Preferably, the temperature-controlling filler is any one of a temperature-controlling composition, a temperature-controlling microsphere and a hydrophobic temperature-controlling microsphere.
Preferably, the temperature control composition is prepared from n-octadecane and dodecanoic acid in a mass ratio of (2-3.5): 1, and a composition formed therefrom.
In long-term production practice, the inventor finds that although the phase-change material has good dynamic temperature control effect, the phase-change material also has the problem of reduced temperature control capability caused by leakage in the coating; meanwhile, the combination of the phase change material and other raw materials in the coating has the phenomena of poor compatibility and uneven dispersion, and the application of the phase change material in the coating field is limited. In order to solve the technical problems, the inventor uses a silicon dioxide and titanium dioxide double-layer shell structure to cover the phase change material, so that leakage of the phase change material can be effectively prevented. The material has high infrared reflectivity and excellent heat insulation performance, and can slow down the rise of the wall temperature when outdoor sunlight is directly irradiated, so that the indoor environment is cooled; when the outdoor temperature is reduced, the heat loss in the room can be reduced, so that the room is kept warm. The silicon dioxide and titanium dioxide double-layer shell structure has stable property, and the material has good weather resistance.
Preferably, the preparation method of the temperature-controlled microsphere comprises the following steps:
taking 30-45 parts by weight of tetraethyl orthosilicate, 150-250 parts by weight of water, 75-100 parts by weight of ammonia water with the concentration of 25-28 wt% and 100-150 parts by weight of ethanol for blending, stirring and mixing the mixture for 12-24 hours at the speed of 150-180 rpm, then centrifugally separating at the speed of 8000-12000 rpm, and washing the centrifugally separated solid product by alcohol and water to obtain silicon dioxide microspheres for later use;
adding the silica microsphere obtained in the X2 step X1 into 300-360 parts of ethanol, performing ultrasonic treatment for 30-45 min at the power of 550-700W, adding 15-18 parts of ammonia water with the concentration of 25-28 wt% and 35-45 parts of tetrabutyl titanate into the mixture, mixing for 12-24 h at the stirring rate of 90-120 rpm under the environment of 40-55 ℃, performing centrifugal separation at the rate of 8000-12000 rpm, performing alcohol washing and water washing on the centrifugal solid product, drying at 75-90 ℃ for 6-8 h, and calcining the obtained dried product at 650-750 ℃ for 1-2 h to obtain the titanium dioxide coated silica microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the X3 step X2 into 400-600 parts of water by ultrasonic action, wherein the ultrasonic action power is 550-700W, the ultrasonic treatment time is 30-45 min, obtaining suspension, adding sodium hydroxide aqueous solution with the concentration of 1mol/L, which is equal to the mass of the suspension, into the suspension, mixing for 1-2 h at the temperature of 80-95 ℃ at the stirring rate of 30-60 rpm, and then centrifugally separating at the rate of 8000-12000 rpm, thus obtaining centrifugal solid products and supernatant for later use;
x4, adding the centrifugal solid product obtained in the step X3 and 8-12 parts of temperature control material into 400-600 parts of water, heating to 50-60 ℃, performing ultrasonic treatment for 30-45 min at the power of 550-700W, dispersing to form a homogeneous emulsion, continuously mixing the homogeneous emulsion at the stirring speed of 180-240 rpm for reacting for 12-24 h, and performing centrifugal separation at the speed of 8000-12000 rpm to obtain temperature control titanium dioxide microspheres for later use;
x5, dispersing the temperature-controlled titanium dioxide microsphere obtained in the step X4 in 400-600 parts of water by ultrasonic, wherein the ultrasonic power is 550-700W, the ultrasonic time is 30-45 min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 10-11 at the stirring rate of 60-90 rpm, then adding the supernatant obtained in the step X3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH within the range of 10-11 in the adding process of the supernatant, heating to 80-95 ℃ after the adding of the supernatant is completed, continuing to stir and react for 2-4 h, centrifugally separating at the speed of 8000-12000 rpm, and drying the centrifugal solid product at the temperature of 75-90 ℃ for 6-8 h after alcohol washing to water washing to obtain the temperature-controlled microsphere.
The temperature-control microsphere has the advantages, but has the problem of poor hydrophobicity in actual use, and water often remains on the surface of the coating due to weather or other reasons in daily use, and the water absorbs a large amount of heat to further reduce the temperature-adjusting capability. The inventor finds that a great amount of hydrophilic hydroxyl groups remain on the surface of the silicon dioxide in the preparation process of the silicon dioxide shell due to the main reason of the technical problem, and the inventor further improves the preparation process on the basis of the hydrophilic hydroxyl groups, replaces the hydroxyl groups on the surface of the silicon dioxide shell by a hydrophobic fluorine-containing chain segment, solves the phenomenon of water residue and improves the hydrophobicity of the coating.
The temperature control material in the step X4 is n-octadecane and dodecanoic acid in a mass ratio of 2.5:1, and a composition formed therefrom.
Preferably, the preparation method of the hydrophobic temperature-control microsphere comprises the following steps:
mixing 30-45 parts of tetraethyl orthosilicate, 150-250 parts of water, 75-100 parts of ammonia water with the concentration of 25-28 wt% and 100-150 parts of ethanol, stirring and mixing the mixture for 12-24 hours at the speed of 150-180 rpm, and then centrifugally separating at the speed of 8000-12000 rpm, and washing the centrifugally separated solid product with alcohol and water to obtain silicon dioxide microspheres for later use;
adding the silicon dioxide microsphere obtained in the Y2 step Y1 into 300-360 parts of ethanol, performing ultrasonic treatment for 30-45 min at the power of 550-700W, adding 15-18 parts of ammonia water with the concentration of 25-28 wt% and 35-45 parts of tetrabutyl titanate into the mixture, mixing for 12-24 h at the stirring rate of 90-120 rpm under the environment of 40-55 ℃, performing centrifugal separation at the rate of 8000-12000 rpm, performing alcohol washing and water washing on the centrifugal solid product, drying at 75-90 ℃ for 6-8 h, and calcining the obtained dried product at 650-750 ℃ for 1-2 h to obtain the titanium dioxide core-coated silicon dioxide microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the step Y2 into 400-600 parts of water by ultrasonic action, wherein the ultrasonic action power is 550-700W, the ultrasonic treatment time is 30-45 min, obtaining suspension, adding sodium hydroxide aqueous solution with the concentration of 1mol/L, which is equal to the mass of the suspension, into the suspension, mixing for 1-2 h at the temperature of 80-95 ℃ at the stirring rate of 30-60 rpm, and then centrifugally separating at the rate of 8000-12000 rpm, thus obtaining centrifugal solid products and supernatant for later use;
y4, adding the centrifugal solid product obtained in the step Y3 and 8-12 parts of temperature control material into 400-600 parts of water, heating to 50-60 ℃, performing ultrasonic treatment for 30-45 min at the power of 550-700W, dispersing to form a homogeneous emulsion, continuously mixing the homogeneous emulsion at the stirring speed of 180-240 rpm for reacting for 12-24 h, and performing centrifugal separation at the speed of 8000-12000 rpm to obtain temperature control titanium dioxide microspheres for later use;
y5, dispersing the temperature-controlled titanium dioxide microspheres obtained in the step Y4 in 400-600 parts of water by ultrasonic, wherein the ultrasonic power is 550-700W, the ultrasonic time is 30-45 min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 10-11 at the stirring rate of 60-90 rpm, then adding the supernatant obtained in the step Y3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH within the range of 10-11 in the adding process of the supernatant, heating to 80-95 ℃ after the adding of the supernatant is completed, continuing to stir and react for 2-4 h, centrifugally separating at the speed of 8000-12000 rpm, and drying the centrifugal solid product at the temperature of 75-90 ℃ for 6-8 h after alcohol washing and water washing to obtain the temperature-controlled microspheres for later use;
y6 dispersing the temperature-controlled microspheres obtained in the step Y5 into 400-500 parts of toluene through ultrasonic treatment, wherein the ultrasonic power is 350-400W, the ultrasonic time is 15-30 min, continuously adding 7.5-15 parts of 1H, 2H-perfluoro octyl trichlorosilane, reacting for 12-24 h at the stirring speed of 180-240 rpm under the protection of nitrogen, centrifuging at the speed of 8000-12000 rpm after the reaction is finished, washing the centrifuged solid product with alcohol, and drying at 75-90 ℃ for 6-8 h to obtain the hydrophobic temperature-controlled microspheres.
The temperature control material in the step Y4 is n-octadecane and dodecanoic acid in a mass ratio of 2.5:1, and a composition formed therefrom.
The invention provides a preparation method of a heat preservation and insulation coating for an outer wall of a building, which comprises the following steps:
s1, referring to the formula proportion, adding water, styrene-acrylic emulsion, talcum powder, wetting agent and dispersing agent into a container, and performing ultrasonic dispersion for 0.5-1 h at the power of 550-750W to obtain a homogeneous mixture for later use;
s2, continuously adding alkyd resin, temperature-controlled filler and film-forming additive into the homogeneous mixture obtained in the step S1, heating to 40-60 ℃, and mixing for 2-4 hours at a stirring rate of 240-480 rpm to obtain a primary mixed coating for later use;
and S3, adding a thickening agent and a defoaming agent into the primary mixed coating obtained in the step S2, mixing for 1-2 hours at the stirring speed of 600-800 rpm, and cooling to normal temperature to obtain the heat preservation and heat insulation coating for the building outer wall.
The raw materials in the formula of the invention are introduced and have the following functions:
alkyd resin: the high molecular polymer is oil modified polyester resin formed by condensation polymerization of polyalcohol, phthalic anhydride and fatty acid or triglyceride, and has luster, toughness, strong adhesive force, good wear resistance, weather resistance, insulativity and the like after being cured into a film.
Styrene-acrylic emulsion: the polymer obtained by emulsion copolymerization of styrene and acrylate monomers has good adhesive force of styrene-acrylic emulsion, transparent adhesive film and good water resistance, oil resistance, heat resistance and ageing resistance.
Talc powder: the main component of the magnesium silicate mineral talcum is hydrous magnesium silicate, which is prepared by crushing, treating with hydrochloric acid, washing with water and drying; the paint is used for fillers of plastic products and paper products, rubber fillers, anti-sticking agents of rubber products, high-grade paint coatings and the like.
And (3) temperature control filler: the phase change material with high phase change latent heat can realize the dynamic regulation of heat.
Film forming auxiliary agent: and the polymer compound can be used for promoting plastic flow and elastic deformation of the polymer compound, improving coalescence property and forming a film in a wider construction temperature range.
And (3) a thickening agent: the polymer compound can increase the viscosity of latex and liquid, and can increase the viscosity of a system, so that the system can maintain a uniform and stable suspension state or an emulsion state or form gel; most thickeners have an emulsifying effect.
Wetting agent: surfactants, by lowering their surface energy, make solid materials more susceptible to wetting by water.
Dispersing agent: the surfactant has both lipophilic and hydrophilic properties in the molecule, and can uniformly disperse the solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquid, and can prevent the sedimentation and agglomeration of the particles to form the amphiphilic reagent required by stable suspension.
Defoaming agent: the coating processing aid can reduce the surface tension of water, solution, suspension and the like, prevent foam formation, or reduce or eliminate the original foam.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the invention.
The invention has the beneficial effects that:
compared with the prior art, the heat-insulating paint added with the phase-change material can realize bidirectional heat exchange, thereby achieving dynamic temperature regulation; the coating has low heat conductivity coefficient and high coating heat resistance, and also has higher phase change latent heat, can absorb part of heat and store in the phase change material when the outdoor temperature is high in daytime, and can release heat when the outdoor temperature is low at night, so that the indoor temperature is kept in a comfortable range, and the effect of dynamic temperature control is achieved.
Compared with the prior art, the phase change material is coated by the silicon dioxide and titanium dioxide double-layer shell structure, so that leakage of the phase change material can be effectively prevented; the material has high infrared reflectivity and excellent heat insulation performance, and can slow down the rise of the wall temperature when outdoor sunlight is directly irradiated, so that the indoor environment is cooled; when the outdoor temperature is reduced, the heat loss in the room can be reduced, so that the room is kept warm; the silicon dioxide and titanium dioxide double-layer shell structure has stable property, and the material has good weather resistance.
Compared with the prior art, the hydrophobic fluorine-containing chain segment is used for replacing hydroxyl on the surface of the silicon dioxide shell, so that the problem that water residues on the surface of the coating occur in practical application due to the fact that a large amount of hydrophilic hydroxyl remains on the surface of the silicon dioxide in the preparation process of the silicon dioxide shell is solved, and the hydrophobicity of the coating is improved.
Detailed Description
The parameters of part of raw materials in the invention are as follows:
alkyd resin, jinan Huijian trade company, CAS number: 63148-69-6;
styrene-acrylic emulsion, shandong Polymer chemistry Co., ltd., CAS number: 25085-34-1;
talcum powder, 1250 mesh, mineral processing plant, CAS No.: 14807-96-6;
hydroxyethyl cellulose, shandong Liang New Material technologies Co., ltd., CAS number: 9004-62-0;
polyether defoamer, AP-2800 type, from the company of Jade clear coating, buddha;
dodecanoic acid, shandong New Material technology Co., ltd., CAS number: 143-07-7.
Example 1
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin, 15kg of n-octadecane and 6kg of film forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
Example 2
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin, 15kg of dodecanoic acid and 6kg of film-forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
Example 3
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin, 15kg of temperature-control composition and 6kg of film-forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
The temperature control composition is prepared from n-octadecane and dodecanoic acid in a mass ratio of 2.5:1, and a composition formed therefrom.
Example 4
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin, 15kg of temperature-controlled microspheres and 6kg of film-forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
The preparation method of the temperature control microsphere comprises the following steps:
taking 45 parts of tetraethyl orthosilicate, 250 parts of water, 100 parts of 28wt% ammonia water and 150 parts of ethanol for blending, stirring and mixing the mixture at a speed of 180rpm for 12 hours, then centrifugally separating at a speed of 12000rpm, and washing a centrifugal solid product with alcohol and water to obtain silicon dioxide microspheres for later use;
adding 300 parts of ethanol into the silica microsphere obtained in the X2 step X1, carrying out ultrasonic treatment for 45min at a power of 550W, adding 18 parts of 28wt% ammonia water and 35 parts of tetrabutyl titanate into the mixture of the two, mixing for 12h at a stirring rate of 120rpm in an environment of 55 ℃, carrying out centrifugal separation at a rate of 12000rpm, washing a centrifugal solid product with alcohol, drying at 80 ℃ for 6h, and calcining the obtained dried product at 750 ℃ for 1h to obtain the titanium dioxide coated silica microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the step X3 and the step X2 into 500 parts of water by ultrasonic action, wherein the ultrasonic action power is 550W, the ultrasonic treatment time is 45min, a suspension is obtained, a sodium hydroxide aqueous solution with the concentration of 1mol/L and the mass of the suspension is added into the suspension, mixing is carried out for 2 hours at the temperature of 80 ℃ at the stirring speed of 60rpm, and centrifugal separation is carried out at the speed of 12000rpm, so that a centrifugal solid product and supernatant are obtained for standby;
x4, adding the centrifugal solid product obtained in the step X3 and 12 parts of temperature control material into 500 parts of water, heating to 60 ℃, carrying out ultrasonic treatment for 45min at the power of 550W, dispersing to form a homogeneous emulsion, continuously mixing and reacting for 12h at the stirring speed of 240rpm, and then carrying out centrifugal separation at the speed of 12000rpm to obtain temperature control titanium dioxide microspheres for later use;
and X5, ultrasonically dispersing the temperature-controlled titanium dioxide microspheres obtained in the step X4 in 500 parts of water, carrying out ultrasonic power of 550W for 45min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 11 at the stirring rate of 90rpm, then adding the supernatant obtained in the step X3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH at 11 in the adding process of the supernatant, heating to 95 ℃ after the adding of the supernatant, continuing to carry out stirring reaction for 2h, carrying out centrifugal separation at the speed of 12000rpm, washing the centrifugal solid product with alcohol, and drying at 90 ℃ for 6h to obtain the temperature-controlled microspheres.
The temperature control material in the step X4 is n-octadecane and dodecanoic acid in a mass ratio of 2.5:1, and a composition formed therefrom.
Example 5
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin, 15kg of hydrophobic temperature-control microspheres and 6kg of film-forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
The preparation method of the hydrophobic temperature-control microsphere comprises the following steps:
taking 45 parts of tetraethyl orthosilicate, 250 parts of water, 100 parts of 28wt% ammonia water and 150 parts of ethanol for blending, stirring and mixing the mixture at a speed of 180rpm for 12 hours, then centrifugally separating at a speed of 12000rpm, and washing a centrifugal solid product with alcohol and water to obtain silicon dioxide microspheres for later use;
adding 300 parts of ethanol into the silica microsphere obtained in the Y2 step Y1, carrying out ultrasonic treatment for 45min at a power of 550W, adding 18 parts of 28wt% ammonia water and 35 parts of tetrabutyl titanate into the mixture of the two, mixing for 12h at a stirring rate of 120rpm in an environment of 55 ℃, carrying out centrifugal separation at a rate of 12000rpm, washing a centrifugal solid product with alcohol, drying at 80 ℃ for 6h, and calcining the obtained dried product at 750 ℃ for 1h to obtain the titanium dioxide coated silica microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the step Y2 into 500 parts of water by ultrasonic action, wherein the ultrasonic action power is 550W, the ultrasonic treatment time is 45min, obtaining suspension, adding sodium hydroxide aqueous solution with the concentration of 1mol/L, which is equal to the mass of the suspension, into the suspension, mixing for 2 hours at 80 ℃ at the stirring rate of 60rpm, and then centrifugally separating at the rate of 12000rpm, thus obtaining a centrifugal solid product and supernatant for later use;
y4, adding the centrifugal solid product obtained in the step Y3 and 12 parts of temperature control material into 500 parts of water, heating to 60 ℃, carrying out ultrasonic treatment for 45min at the power of 550W, dispersing to form a homogeneous emulsion, continuously mixing and reacting for 12h at the stirring rate of 240rpm, and then carrying out centrifugal separation at the rate of 12000rpm to obtain temperature control titanium dioxide microspheres for later use;
y5, ultrasonically dispersing the temperature-controlled titanium dioxide microspheres obtained in the step Y4 in 500 parts of water, carrying out ultrasonic power of 550W for 45min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 11 at the stirring rate of 90rpm, then adding the supernatant obtained in the step X3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH at 11 in the adding process of the supernatant, heating to 95 ℃ after the adding of the supernatant, continuing stirring and reacting for 2h, carrying out centrifugal separation at the speed of 12000rpm, washing a centrifugal solid product with alcohol, and drying at 90 ℃ for 6h to obtain the temperature-controlled microspheres for later use;
y6 dispersing the temperature-controlled microsphere obtained in the step Y5 into 500 parts of toluene through ultrasonic treatment, wherein the ultrasonic power is 400W, the ultrasonic time is 25min, 12.5 parts of 1H, 2H-perfluoro octyl trichlorosilane is continuously added, the reaction is carried out for 24h under the protection of nitrogen at the stirring speed of 240rpm, centrifugal separation is carried out at the speed of 12000rpm after the reaction is finished, and the centrifugal solid product is dried for 6h at 80 ℃ after alcohol washing and water washing, so as to obtain the hydrophobic temperature-controlled microsphere.
The temperature control material in the step Y4 is n-octadecane and dodecanoic acid in a mass ratio of 2.5:1, and a composition formed therefrom.
Comparative example 1
The heat preservation and insulation coating for the building outer wall is prepared by the following method:
adding 12kg of water, 16kg of styrene-acrylic emulsion, 14kg of talcum powder, 0.2kg of wetting agent and 0.4kg of dispersing agent into a S1 container, and performing ultrasonic dispersion for 0.5h with power of 750W to obtain a homogeneous mixture for later use;
s2, continuously adding 26kg of alkyd resin and 6kg of film-forming auxiliary agent into the homogeneous mixture obtained in the step S1, heating to 45 ℃, and mixing for 2 hours at a stirring speed of 480rpm to obtain a primary mixed coating for later use;
and S3, adding 1.8kg of thickener and 0.2kg of defoamer into the primary mixed coating obtained in the step S2, mixing for 2 hours at a stirring speed of 800rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
The particle size of the talcum powder is 1250 meshes.
The film forming additive is propylene glycol methyl ether.
The thickener is hydroxyethyl cellulose.
The wetting agent is glycerol.
The dispersing agent is sodium dodecyl benzene sulfonate.
The defoaming agent is polyether defoaming agent.
Test example 1
The heat-insulating paint for the building outer wall, which is obtained in each example and the comparison example, is coated on the main part of the enclosure structure of the test room by adopting the construction process of the universal outer wall paint in the building industry, the thickness of the paint is 5mm, and the main part of the enclosure structure of the room, which is used as a blank comparison, is not coated with any heat-insulating paint. The detection of the heat transfer coefficient of the main body part of the building enclosure is carried out according to the specific requirements of JGJ/T132-2009 'detection of the heat transfer coefficient of the main body part of the seventh section of enclosure of the residential building energy conservation detection standard'. The measurement was performed using an XYWH-01A type building envelope on-site heat transfer coefficient detector and its associated software (available from Shenyang Xinyu, inc. of the development of science and technology). The heat transfer coefficient test results of the main body part of the building envelope are shown in table 1.
Table 1: heat transfer coefficient test result table for main body part of building envelope structure
| Heat transfer coefficient [ W/(m) 2 ·K)] | |
| Example 1 | 0.58 |
| Example 2 | 0.60 |
| Example 3 | 0.53 |
| Example 4 | 0.46 |
| Example 5 | 0.42 |
| Comparative example 1 | 0.64 |
| Blank control | 0.67 |
The lower the heat transfer coefficient of the main body part of the building enclosure structure is, the less the heat loss is, the energy-saving effect is excellent, the heat transfer coefficient of 50% of energy-saving requirements is less than or equal to 0.65, the heat transfer coefficient of 65% of energy-saving requirements is less than or equal to 0.50, and the heat transfer coefficient of 75% of energy-saving requirements is less than or equal to 0.45 according to the specific standard of energy saving of residential buildings. As can be seen from the comparison of the examples and the comparative examples, the heat-insulating coating prepared by using the hydrophobic temperature-control microspheres as the temperature-control filler can play a good energy-saving effect when applied to the building enclosure, and the reason is that the coating prepared by coating the phase-change material with the silica and titanium dioxide double-layer shell structure has low heat conductivity coefficient, high heat resistance and excellent heat insulation performance, can realize the bidirectional heat exchange and achieves the energy-saving effect.
Test example 2
Test room paint brushing method process referring to test example 1, the test room outdoor air dry bulb temperature and the indoor air dry bulb temperature were measured. The temperature change in 24 hours was counted by using a dry-wet bulb thermometer, 5 sets of temperature data were measured every 6 hours, and the results were averaged. The test is carried out in the coldest month, namely 12 months in winter in the test place, and the size of the room of the building is measured to be 30m for simulating the living environment of the room in winter 2 Personnel density of 15m 2 Person, illumination power density of 2.8W/m 2 The device power was 3.8W/m 2 . The indoor and outdoor air dry bulb temperature test results of the main body part of the building enclosure structure in winter are shown in table 2.
Table 2: indoor and outdoor air dry bulb temperature test result table for main body part of building envelope structure
Under the test environment, the higher the indoor air dry bulb temperature is, the less the outdoor temperature change is easy to collect, and the stronger the temperature adjusting capability of the coating is represented. As can be seen from the comparison of the examples and the test examples, the phase-change material can play a good role in temperature regulation, and the reason may be that the silicon dioxide and titanium dioxide double-layer shell structure coats the phase-change material, so that part of heat can be absorbed and stored in the phase-change material when the outdoor temperature is high in daytime, and the phase-change material can release heat when the outdoor temperature is low at night, so that the indoor temperature is kept in a comfortable range, and the effect of dynamic temperature control is achieved.
Test example 3
The heat preservation and insulation coating for the building outer wall is smeared on a test slide sheet with the thickness of 5cm multiplied by 5cm, the thickness is 1mm, and the test slide sheet is solidified for 24 hours to prepare a hydrophobic performance test sample. The contact angle of the coating was measured using a CSCDIC-100 standard contact angle measuring instrument (available from Shanghai Zhongzhu Co., ltd.), and 5 test samples were prepared for each group of examples or control examples, and the results were averaged. The results of the hydrophobic property test of the heat-insulating paint for the outer wall of the building are shown in Table 3.
Table 3: hydrophobic property test result table of heat preservation and heat insulation coating for building outer wall
| Contact angle (°) | |
| Example 3 | 106 |
| Example 4 | 122 |
| Example 5 | 162 |
The material is characterized in that at the junction of solid, liquid and gas phases, the included angle from the solid-liquid interface to the gas-liquid interface is formed by passing through the inside of the liquid, when the contact angle is more than 90 degrees, the material shows hydrophobic property, and the larger the contact angle is, the better the hydrophobic property of the material is. It can be seen from a comparison of examples 3 to 5 that the hydrophobic temperature control microsphere is introduced as a filler to increase the hydrophobic property of the coating, probably because the hydrophobic fluorine-containing chain segment replaces the hydroxyl group on the surface of the silica shell, and increases the contact angle of the liquid.
Claims (9)
1. The heat preservation and insulation coating for the building outer wall is characterized by comprising the following raw materials in parts by weight: 20-28 parts of alkyd resin, 14-22 parts of styrene-acrylic emulsion, 12-18 parts of water, 12-16 parts of talcum powder, 12-18 parts of temperature-control filler, 4-6 parts of film-forming additive, 1.8-2.4 parts of thickener, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent and 0.1-0.2 part of defoaming agent;
the temperature control filler is any one of temperature control microspheres and hydrophobic temperature control microspheres;
the preparation method of the temperature control microsphere comprises the following steps:
taking 30-45 parts by weight of tetraethyl orthosilicate, 150-250 parts by weight of water, 75-100 parts by weight of ammonia water with the concentration of 25-28 wt% and 100-150 parts by weight of ethanol for blending, stirring and mixing the mixture for 12-24 hours at the speed of 150-180 rpm, then centrifugally separating at the speed of 8000-12000 rpm, and washing the centrifugally separated solid product by alcohol and water to obtain silicon dioxide microspheres for later use;
adding the silica microsphere obtained in the X2 step X1 into 300-360 parts of ethanol, performing ultrasonic treatment for 30-45 min at the power of 550-700W, adding 15-18 parts of ammonia water with the concentration of 25-28 wt% and 35-45 parts of tetrabutyl titanate into the mixture, mixing for 12-24 h at the stirring rate of 90-120 rpm under the environment of 40-55 ℃, performing centrifugal separation at the rate of 8000-12000 rpm, performing alcohol washing and water washing on the centrifugal solid product, drying at 75-90 ℃ for 6-8 h, and calcining the obtained dried product at 650-750 ℃ for 1-2 h to obtain the titanium dioxide coated silica microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the X3 step X2 into 400-600 parts of water by ultrasonic action, wherein the ultrasonic action power is 550-700W, the ultrasonic treatment time is 30-45 min, obtaining suspension, adding sodium hydroxide aqueous solution with the concentration of 1mol/L, which is equal to the mass of the suspension, into the suspension, mixing for 1-2 h at the temperature of 80-95 ℃ at the stirring rate of 30-60 rpm, and then centrifugally separating at the rate of 8000-12000 rpm, thus obtaining centrifugal solid products and supernatant for later use;
x4, adding the centrifugal solid product obtained in the step X3 and 8-12 parts of temperature control material into 400-600 parts of water, heating to 50-60 ℃, performing ultrasonic treatment for 30-45 min at the power of 550-700W, dispersing to form a homogeneous emulsion, continuously mixing the homogeneous emulsion at the stirring speed of 180-240 rpm for reacting for 12-24 h, and performing centrifugal separation at the speed of 8000-12000 rpm to obtain temperature control titanium dioxide microspheres for later use;
x5, ultrasonically dispersing the temperature-controlled titanium dioxide microspheres obtained in the step X4 in 400-600 parts of water, wherein the ultrasonic power is 550-700W, the ultrasonic time is 30-45 min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 10-11 at the stirring rate of 60-90 rpm, then adding the supernatant obtained in the step X3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH within the range of 10-11 in the adding process of the supernatant, heating to 80-95 ℃ after the adding of the supernatant is completed, continuing to stir and react for 2-4 h, centrifugally separating at the speed of 8000-12000 rpm, and drying the centrifugal solid product at the temperature of 75-90 ℃ for 6-8 h after alcohol washing and water washing to obtain the temperature-controlled microspheres;
the preparation method of the hydrophobic temperature-control microsphere comprises the following steps:
mixing 30-45 parts of tetraethyl orthosilicate, 150-250 parts of water, 75-100 parts of ammonia water with the concentration of 25-28 wt% and 100-150 parts of ethanol, stirring and mixing the mixture for 12-24 hours at the speed of 150-180 rpm, and then centrifugally separating at the speed of 8000-12000 rpm, and washing the centrifugally separated solid product with alcohol and water to obtain silicon dioxide microspheres for later use;
adding the silicon dioxide microsphere obtained in the Y2 step Y1 into 300-360 parts of ethanol, performing ultrasonic treatment for 30-45 min at the power of 550-700W, adding 15-18 parts of ammonia water with the concentration of 25-28 wt% and 35-45 parts of tetrabutyl titanate into the mixture, mixing for 12-24 h at the stirring rate of 90-120 rpm under the environment of 40-55 ℃, performing centrifugal separation at the rate of 8000-12000 rpm, performing alcohol washing and water washing on the centrifugal solid product, drying at 75-90 ℃ for 6-8 h, and calcining the obtained dried product at 650-750 ℃ for 1-2 h to obtain the titanium dioxide core-coated silicon dioxide microsphere for later use;
dispersing the titanium dioxide coated silica microspheres obtained in the step Y2 into 400-600 parts of water by ultrasonic action, wherein the ultrasonic action power is 550-700W, the ultrasonic treatment time is 30-45 min, obtaining suspension, adding sodium hydroxide aqueous solution with the concentration of 1mol/L, which is equal to the mass of the suspension, into the suspension, mixing for 1-2 h at the temperature of 80-95 ℃ at the stirring rate of 30-60 rpm, and then centrifugally separating at the rate of 8000-12000 rpm, thus obtaining centrifugal solid products and supernatant for later use;
y4, adding the centrifugal solid product obtained in the step Y3 and 8-12 parts of temperature control material into 400-600 parts of water, heating to 50-60 ℃, performing ultrasonic treatment for 30-45 min at the power of 550-700W, dispersing to form a homogeneous emulsion, continuously mixing the homogeneous emulsion at the stirring speed of 180-240 rpm for reacting for 12-24 h, and performing centrifugal separation at the speed of 8000-12000 rpm to obtain temperature control titanium dioxide microspheres for later use;
y5, dispersing the temperature-controlled titanium dioxide microspheres obtained in the step Y4 in 400-600 parts of water by ultrasonic, wherein the ultrasonic power is 550-700W, the ultrasonic time is 30-45 min, adding a sodium hydroxide aqueous solution with the concentration of 1mol/L to adjust the pH to 10-11 at the stirring rate of 60-90 rpm, then adding the supernatant obtained in the step Y3, adding hydrochloric acid with the concentration of 0.1mol/L to keep the pH within the range of 10-11 in the adding process of the supernatant, heating to 80-95 ℃ after the adding of the supernatant is completed, continuing to stir and react for 2-4 h, centrifugally separating at the speed of 8000-12000 rpm, and drying the centrifugal solid product at the temperature of 75-90 ℃ for 6-8 h after alcohol washing and water washing to obtain the temperature-controlled microspheres for later use;
y6 dispersing the temperature-controlled microspheres obtained in the step Y5 into 400-500 parts of toluene through ultrasonic treatment, wherein the ultrasonic power is 350-400W, the ultrasonic time is 15-30 min, continuously adding 7.5-15 parts of 1H, 2H-perfluoro octyl trichlorosilane, reacting for 12-24 h at the stirring speed of 180-240 rpm under the protection of nitrogen, centrifuging at the speed of 8000-12000 rpm after the reaction is finished, washing the centrifuged solid product with alcohol, and drying at 75-90 ℃ for 6-8 h to obtain the hydrophobic temperature-controlled microspheres.
2. The heat preservation and heat insulation coating for the outer wall of the building according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 26 parts of alkyd resin, 16 parts of styrene-acrylic emulsion, 12 parts of water, 14 parts of talcum powder, 15 parts of temperature-control filler, 6 parts of film-forming auxiliary agent, 1.8 parts of thickener, 0.2 part of wetting agent, 0.4 part of dispersing agent and 0.2 part of defoaming agent.
3. The heat-insulating paint for building exterior walls according to claim 1, wherein: the particle size of the talcum powder is 800-1250 meshes.
4. The heat-insulating paint for building exterior walls according to claim 1, wherein: the film forming additive is any one of propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether and propylene glycol phenyl ether.
5. The heat-insulating paint for building exterior walls according to claim 1, wherein: the thickener is any one of hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose and hydroxypropyl cellulose.
6. The heat-insulating paint for building exterior walls according to claim 1, wherein: the dispersing agent is any one of sodium dodecyl benzene sulfonate, fatty acid sulfoalkyl ester, fatty acid sulfoalkyl amide and dibutyl sodium naphthalene sulfonate.
7. The heat-insulating paint for building exterior walls according to claim 1, wherein: the temperature control material is n-octadecane and dodecanoic acid in a mass ratio of (2-3.5): 1, and a composition formed therefrom.
8. The heat-insulating paint for building exterior walls according to claim 1, wherein: the wetting agent is any one of glycerol, ethanol, propylene glycol and dimethyl sulfoxide.
9. The method for preparing the heat preservation and heat insulation coating for the outer wall of the building according to any one of claims 1 to 8, comprising the following steps: s1, referring to the formula proportion, adding water, styrene-acrylic emulsion, talcum powder, wetting agent and dispersing agent into a container, and performing ultrasonic dispersion for 0.5-1 h at the power of 550-750W to obtain a homogeneous mixture for later use; s2, continuously adding alkyd resin, temperature-controlled filler and film-forming additive into the homogeneous mixture obtained in the step S1, heating to 40-60 ℃, and mixing for 2-4 hours at a stirring rate of 240-480 rpm to obtain a primary mixed coating for later use; and S3, adding a thickening agent and a defoaming agent into the primary mixed coating obtained in the step S2, mixing for 1-2 hours at the stirring speed of 600-800 rpm, and cooling to normal temperature to obtain the heat-insulating coating for the building outer wall.
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