CN114921120B - Reflective heat-insulation phase-change latent heat material for outer wall and preparation method thereof - Google Patents
Reflective heat-insulation phase-change latent heat material for outer wall and preparation method thereof Download PDFInfo
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
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- 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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
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- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
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Abstract
The application relates to the field of building coatings, and particularly discloses a reflective heat-insulation phase-change latent heat material for an outer wall and a preparation method thereof. The reflective heat-insulation phase-change latent heat material for the outer wall comprises the following raw materials in percentage by weight: 1-3% of redispersible latex powder, 20-30% of cement, 1-5% of reflective pigment, 0.5-2% of titanium dioxide, 0.5-2% of hollow glass microsphere, 1-3% of phase change material, 20-30% of heat insulation additive, 0.2-0.5% of hydroxypropyl methyl cellulose ether and 30-40% of talcum powder; each part by weight of the heat insulation additive is formed by grafting vermiculite powder and calcined kaolin in a weight ratio of 1 to (5-7); the calcined kaolin has a mesh size of 800-1250 meshes, and the vermiculite powder has a mesh size of 200-250 meshes. The application provides a reflective insulation phase change latent heat material for outer wall has better thermal-insulated effect.
Description
Technical Field
The application relates to the field of building coatings, in particular to a reflective heat-insulation phase-change latent heat material for an outer wall and a preparation method thereof.
Background
At present, in the aspect of building engineering, in order to improve the heat insulation function of a building, a reflective heat insulation coating is generally coated on an outer wall of the building, and the reflective heat insulation coating is used as a coating integrating reflection, radiation and heat insulation, can absorb and release a proper amount of heat energy, reduce the absorption of the building on solar radiation heat, and prevent the temperature rise of the surface of the building caused by the absorption of solar radiation, so that the heat is reduced from being transmitted into the room, and a heat insulation effect is achieved.
The existing reflective heat-insulating coating is generally composed of reflective heat-insulating pigment, rutile reflective heat-insulating titanium dioxide, phase-change material, hollow microspheres and the like, and a coating film obtained after the coating is solidified has reflective heat-insulating performance by utilizing the dispersion of various components in a system. However, in practical application, the heat insulation effect caused by the single dispersion of the heat insulation component in the coating system cannot achieve the expected heat insulation effect well, so how to ensure that the whole coating film has better heat insulation performance is a problem to be solved at present.
Disclosure of Invention
In order to improve the heat insulation performance of the whole coating film, the application provides a reflective heat insulation phase change latent heat material for an outer wall and a preparation method thereof.
In a first aspect, the application provides a reflective heat insulation phase change latent heat material for an outer wall, which adopts the following technical scheme: a reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials in percentage by weight: 1-3% of redispersible latex powder, 20-30% of cement, 1-5% of reflective pigment, 0.5-2% of titanium dioxide, 0.5-2% of hollow glass microsphere, 1-3% of phase change material, 20-30% of heat insulation additive, 0.2-0.5% of hydroxypropyl methyl cellulose ether and 30-40% of talcum powder;
each part of the heat insulation additive is formed by grafting vermiculite powder and calcined kaolin in a weight ratio of 1: 5-7; the calcined kaolin has a mesh number of 800-1250 meshes, and the vermiculite powder has a mesh number of 200-250 meshes.
By adopting the technical scheme, the redispersible latex powder has better bonding performance, can promote the bonding firmness between the coating and the wall surface, and simultaneously can improve the hydration of cement and reduce the possibility of cracking of the coating film at the early stage; the reflective pigment can reflect solar infrared rays and ultraviolet rays, so that the possibility of accumulated temperature rise of the heat of the sun on the surface of an object is reduced; the titanium dioxide has better weather resistance and glossiness, can resist the irradiation of ultraviolet light, and can improve the aging resistance of a coating film; the hollow glass beads have extremely low heat conductivity coefficient, can improve the heat insulation effect of a coating film, and meanwhile, the self spherical structure can enhance the flowing smearing performance of the coating; the phase-change material can absorb and release a proper amount of heat energy, so that the indoor temperature can be kept stable or approximately stable; the hydroxypropyl methyl cellulose ether can enhance the binding force between a coating film and a wall surface and improve the wear resistance of the coating film; the talcum powder can endow the coating with good brushing property and leveling property, and improve the impact resistance and flexibility of the coating film.
The vermiculite powder is light in weight, small in heat conductivity and excellent in heat insulation performance, the calcined kaolin has a layered structure and a high refractive index, and has excellent shielding capacity on ultraviolet rays and infrared rays, meanwhile, the flat performance of the kaolin can balance the fluidity and the leveling property of the coating, and in the coating forming process, the flat calcined kaolin particles tend to be arranged in parallel on the surface of the coating, so that a heat insulation layer capable of reflecting infrared rays can be formed on the surface of the coating, the vermiculite powder and the kaolin are grafted, when the kaolin forms the heat insulation layer on the surface of the coating, the vermiculite powder can additionally form the heat insulation layer on the inner side of the kaolin heat insulation layer, so that the surface layer of the coating has the heat insulation layer with the heat insulation effect, and the coated heat insulation effect can be effectively improved by combining hollow glass beads in the coating.
In a specific embodiment, the calcined kaolin has a mesh size of 1250 mesh and the vermiculite powder has a mesh size of 250 mesh.
By adopting the technical scheme, the larger the mesh number is, the finer the calcined kaolin is, the better the flowability of the calcined kaolin in a coating system is, and the calcined kaolin is beneficial to being arranged in parallel on the surface layer of a coating and forming a heat insulation layer; the vermiculite powder with a specific mesh number can be better grafted with calcined kaolin, and meanwhile, the fluidity of the vermiculite powder in a coating system can be improved, so that a heat insulation layer can be formed in the surface layer of a coating film. The calcined kaolin and the vermiculite powder with specific meshes are selected for grafting, so that the possibility that the calcined kaolin and the vermiculite powder are poor in grafting effect or are easy to separate when the meshes of the calcined kaolin and the vermiculite powder are very close to each other can be reduced.
In a specific embodiment, the vermiculite powder is polyurethane-coated modified vermiculite powder, and the heat-insulating additive is prepared by the following method: mixing silane coupling agent with water to prepare 1-2% aqueous solution, adding calcined kaolin and modified vermiculite powder into the aqueous solution according to a ratio, stirring, filtering and drying to obtain the heat insulation additive.
By adopting the technical scheme, the silane oxygen group in the silane coupling agent has reactivity to inorganic matters, the organic functional group has reactivity to organic matters, the silane coupling agent can enable the inorganic matrix and the organic matrix to form a bonding layer of the organic matrix, the silane coupling agent and the inorganic matrix, polyurethane is used for wrapping vermiculite powder, the surface of the vermiculite powder has the property of organic radicals, calcined kaolin is inorganic matters, the silane coupling agent can graft the vermiculite powder and the calcined kaolin, and when the calcined kaolin is arranged in parallel on the surface layer of a coating film to form a heat insulation layer in the process of forming the coating film, the vermiculite powder can additionally form the heat insulation layer on the inner side, so that the integral heat insulation effect of the coating film is improved.
In a specific embodiment, the modified vermiculite powder is prepared as follows: putting vermiculite powder into aqueous polyurethane solution, soaking for 10-15min, filtering, and drying at 50-60 deg.C to obtain modified vermiculite powder.
By adopting the technical scheme, polyurethane can form a film on the surface of the vermiculite powder to obtain the modified vermiculite powder coated by the polyurethane, so that the vermiculite powder has the property of an organic matrix.
In a specific embodiment, the talc has a mesh size of 400 to 500 mesh.
By adopting the technical scheme, the coating is more favorable for improving the brushing property and the leveling property of the coating by the talcum powder.
In a particular embodiment, the reflective pigment is selected from titanium dioxide.
In a particular embodiment, the hydroxypropyl methylcellulose ether has a viscosity of from 4 to 6 ten thousand mpa.s.
Through adopting above-mentioned technical scheme, when hydroxypropyl methyl cellulose ether viscosity was low excessively, influence the bonding firmness between coating and the wall easily, when hydroxypropyl methyl cellulose ether viscosity was too high, arouse the fracture of coating again easily, and select for use hydroxypropyl methyl cellulose ether of specific viscosity can play the effect that strengthens coating viscosity, can reduce the possibility of coating fracture simultaneously again.
In a second aspect, the application provides a preparation method of a reflective heat insulation phase change latent heat material for an outer wall, which adopts the following technical scheme:
a preparation method of a reflective heat insulation phase change latent heat material for an outer wall comprises the steps of mixing redispersible latex powder, cement, heat insulation pigment, titanium dioxide, hollow glass beads, a phase change material, a heat insulation additive, hydroxypropyl methyl cellulose ether and talcum powder according to a ratio, and uniformly stirring to obtain the reflective heat insulation phase change latent heat material.
In summary, the present application has the following beneficial effects:
1. according to the application, the vermiculite powder and the calcined kaolin are grafted, and in the coating forming process, when the calcined kaolin is arranged in parallel on the coating surface layer to form the heat insulation layer, the vermiculite powder can be driven to further form the heat insulation layer on the inner side, so that the coating surface layer can form an even heat insulation layer, and the heat insulation effect of the coating can be integrally improved.
2. According to the application, polyurethane is utilized to wrap the vermiculite powder, so that the vermiculite powder has an organic matrix, and the silane coupling agent can combine the vermiculite powder and the calcined kaolin, so that the vermiculite powder and the calcined kaolin can form a heat insulation layer on the surface layer of a coating film, and the heat insulation effect of the coating film is effectively improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The redispersible latex powder is purchased from Gallery Dinghe energy saving technology Limited, model 5088; the cement is portland cement purchased from Hebei Mimmani mineral products Co., ltd; titanium dioxide was purchased from Shandong Jiechen chemical; titanium dioxide was purchased from Shandong Yufeng chemical Co., ltd; hollow glass microspheres were purchased from Shijiazhuang De ze mineral products, inc., model DZ020; phase change materials were purchased from forsman technologies (beijing) ltd, model 9707010.
Examples of preparation of Heat-insulating additive
Preparation example 1
The heat insulation additive is prepared by the following method:
s1, weighing vermiculite powder and calcined kaolin in a weight ratio of 1: 5, wherein the mesh number of the vermiculite powder is 250 meshes, and the mesh number of the calcined kaolin is 1250 meshes;
s2, putting the vermiculite powder into the aqueous polyurethane solution, wherein the mass ratio of the vermiculite powder to the aqueous polyurethane solution is 1;
s3, preparing a 1% aqueous solution from a silane coupling agent and water, adding calcined kaolin and modified vermiculite powder into the aqueous solution, wherein the mass ratio of the total mass of the calcined kaolin and the modified vermiculite powder to the aqueous solution is 1.
Preparation example 2
The heat insulation additive is prepared by the following method:
s1, weighing vermiculite powder and calcined kaolin in a weight ratio of 1: 6, wherein the mesh number of the vermiculite powder is 250 meshes, and the mesh number of the calcined kaolin is 1250 meshes;
s2, putting the vermiculite powder into the aqueous polyurethane solution, wherein the mass ratio of the vermiculite powder to the aqueous polyurethane solution is 1;
s3, preparing a 1% aqueous solution from a silane coupling agent and water, adding calcined kaolin and modified vermiculite powder into the aqueous solution, wherein the mass ratio of the total mass of the calcined kaolin and the modified vermiculite powder to the aqueous solution is 1.
Preparation example 3
The heat insulation additive is prepared by the following method:
s1, weighing vermiculite powder and calcined kaolin in a weight ratio of 1: 7, wherein the mesh number of the vermiculite powder is 250 meshes, and the mesh number of the calcined kaolin is 1250 meshes;
s2, putting the vermiculite powder into the aqueous polyurethane solution, wherein the mass ratio of the vermiculite powder to the aqueous polyurethane solution is 1;
s3, preparing a 1% aqueous solution from a silane coupling agent and water, adding calcined kaolin and modified vermiculite powder into the aqueous solution, wherein the mass ratio of the total mass of the calcined kaolin and the modified vermiculite powder to the aqueous solution is 1.
Preparation example 4
The preparation example differs from preparation example 1 only in that the mesh number of the vermiculite powder is 200 mesh and the mesh number of the calcined kaolin is 1250 mesh.
Preparation example 5
The preparation example differs from preparation example 1 only in that the mesh number of the vermiculite powder is 200 mesh and the mesh number of the calcined kaolin is 800 mesh.
Examples
Example 1
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 100g of redispersible latex powder, 3000g of cement, 100g of reflective pigment, 50g of titanium dioxide, 50g of hollow glass microspheres, 100g of phase change material, 2580g of heat insulation additive prepared in preparation example 1, 20g of hydroxypropyl methyl cellulose ether and 4000g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 4 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall comprises the following steps: mixing the redispersible latex powder, the cement, the heat insulation pigment, the titanium dioxide, the hollow glass microspheres, the phase change material, the heat insulation additive, the hydroxypropyl methyl cellulose ether and the talcum powder according to the proportion, and uniformly stirring to obtain the heat insulation material.
Example 2
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 200g of redispersible latex powder, 2970g of cement, 400g of reflective pigment, 100g of titanium dioxide, 100g of hollow glass microspheres, 200g of phase-change material, 3000g of the heat-insulating additive prepared in the preparation example 1, 30g of hydroxypropyl methyl cellulose ether and 3000g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 5 ten thousand mpa.s, and the mesh number of the talcum powder is 500 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall is the same as that of the embodiment 1.
Example 3
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 200g of redispersible latex powder, 2000g of cement, 300g of reflective pigment, 150g of titanium dioxide, 150g of hollow glass microspheres, 300g of phase change material, 3000g of the heat insulation additive prepared in the preparation example 1, 40g of hydroxypropyl methyl cellulose ether and 3860g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 6 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall is the same as that of the embodiment 1.
Example 4
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 300g of redispersible latex powder, 3000g of cement, 500g of reflective pigment, 200g of titanium dioxide, 200g of hollow glass microspheres, 300g of phase-change material, 2000g of the heat insulation additive prepared in the preparation example 1, 50g of hydroxypropyl methyl cellulose ether and 3450g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 4 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall is the same as that of the embodiment 1.
Example 5
This example differs from example 1 only in that the heat-insulating additive prepared in preparation example 2 was used as the heat-insulating additive.
Example 6
This example differs from example 1 only in that the heat-insulating additive prepared in preparation example 3 was used as the heat-insulating additive.
Example 7
This example differs from example 1 only in that the heat-insulating additive prepared in preparation example 4 was used as the heat-insulating additive.
Example 8
This example differs from example 1 only in that the heat-insulating additive prepared in preparation example 5 was used as the heat-insulating additive.
Comparative example
Comparative example 1
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 100g of redispersible latex powder, 3000g of cement, 100g of reflective pigment, 50g of titanium dioxide, 50g of hollow glass microspheres, 100g of phase change material, 430g of vermiculite powder, 2150g of calcined kaolin, 20g of hydroxypropyl methyl cellulose ether and 4000g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 4 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall comprises the following steps: mixing the redispersible latex powder, the cement, the heat insulation pigment, the titanium dioxide, the hollow glass beads, the phase change material, the vermiculite powder, the calcined kaolin, the hydroxypropyl methyl cellulose ether and the talcum powder according to the proportion, and uniformly stirring to obtain the composite material.
Comparative example 2
This example differs from example 1 only in that the weight ratio of vermiculite powder to calcined kaolin during the preparation of the insulating additive is 1: 2.
Comparative example 3
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 100g of redispersible latex powder, 3000g of cement, 100g of reflective pigment, 50g of titanium dioxide, 50g of hollow glass microspheres, 100g of phase change material, 2580g of vermiculite powder with the mesh number of 250, 20g of hydroxypropyl methyl cellulose ether and 4000g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 4 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall comprises the following steps: mixing the redispersible latex powder, the cement, the heat insulation pigment, the titanium dioxide, the hollow glass beads, the phase change material, the heat insulation additive, the hydroxypropyl methyl cellulose ether and the talcum powder according to the proportion, and uniformly stirring to obtain the heat insulation paint.
Comparative example 4
A reflective heat-insulation phase-change latent heat material for an outer wall is composed of the following raw materials: 100g of redispersible latex powder, 3000g of cement, 100g of reflective pigment, 50g of titanium dioxide, 50g of hollow glass microspheres, 100g of phase change material, 2580g of calcined kaolin with the mesh number of 1250 meshes, 20g of hydroxypropyl methyl cellulose ether and 4000g of talcum powder. Wherein the viscosity of the hydroxypropyl methyl cellulose ether is 4 ten thousand mpa.s, and the mesh number of the talcum powder is 400 meshes.
The preparation method of the reflective heat-insulation phase-change latent heat material for the outer wall comprises the following steps: mixing the redispersible latex powder, the cement, the heat insulation pigment, the titanium dioxide, the hollow glass beads, the phase change material, the heat insulation additive, the hydroxypropyl methyl cellulose ether and the talcum powder according to the proportion, and uniformly stirring to obtain the heat insulation paint.
Comparative example 5
The comparative example differs from example 1 only in that the mesh number of the vermiculite powder was 200 mesh and the mesh number of the calcined kaolin was 500 mesh during the preparation of the heat-insulating additive.
Performance test
The reflective insulation phase change latent heat materials for the outer walls in each embodiment and each proportion are respectively mixed with water to prepare mixed slurry, the weight of the water is 15% of that of the reflective insulation phase change latent heat materials for the outer walls, then the solar reflectance and the hemispherical emissivity are determined by referring to JC/T1040-2007 thermal reflective insulation coating for the outer surfaces of buildings, and the phase change latent heat and the durability are determined by referring to JC/T2338-2015 building energy storage temperature regulation mortar;
in addition, in the middle of the summer, on the top floor with the height of four floors, the temperature of the concrete floor on the top floor was measured by a temperature tester at 58 ℃, then the mixed slurry made of the reflective insulation phase change latent heat material for the outer wall in each example and each comparative example was coated on the floor with the thickness of 2mm, after the coating was dried, the temperature of the surface of the coating film was measured by the temperature tester and recorded, and the results are shown in table 1.
TABLE 1 Performance test results
Referring to table 1, the coating films of examples 1 to 4 had superior solar reflectance and showed superior cooling effect, compared to comparative examples 1, 3 and 4, indicating that combining vermiculite powder and calcined kaolin can more effectively improve the heat insulating properties of the coating films.
The coating films of examples 1, 5 and 6 have better heat insulation effects than comparative example 2, indicating that the preparation of the heat insulation additive according to the ratio disclosed in the present application facilitates the mutual bonding between the calcined kaolin and the vermiculite powder and the formation of a heat insulation layer on the surface layer of the coating film during the formation of the coating film, thereby providing superior heat insulation effects to the coating film.
The coating films of examples 1, 7 and 8 have better heat insulation effect than comparative example 5, which shows that the mesh number of calcined kaolin and the mesh number of vermiculite powder can influence the combination of the calcined kaolin and the vermiculite powder to some extent, the calcined kaolin and the vermiculite powder are selected according to the mesh numbers disclosed in the application, the combination of the calcined kaolin and the vermiculite powder is more beneficial, and the combination effect of the calcined kaolin and the vermiculite powder is poorer as the mesh numbers of the calcined kaolin and the vermiculite powder are closer, so that the heat insulation layer formed on the surface layer of the coating film per se is influenced, and the heat insulation effect of the coating film is reduced.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (7)
1. A reflective heat-insulation phase-change latent heat material for an outer wall is characterized by comprising the following raw materials in percentage by weight: 1-3% of redispersible latex powder, 20-30% of cement, 1-5% of reflective pigment, 0.5-2% of titanium dioxide, 0.5-2% of hollow glass microsphere, 1-3% of phase change material, 20-30% of heat insulation additive, 0.2-0.5% of hydroxypropyl methyl cellulose ether and 30-40% of talcum powder;
each part of the heat insulation additive is formed by grafting vermiculite powder and calcined kaolin in a weight ratio of 1: 5-7; the mesh number of the calcined kaolin is 800-1250 meshes, and the mesh number of the vermiculite powder is 200-250 meshes;
the vermiculite powder is polyurethane-coated modified vermiculite powder, and the heat insulation additive is prepared by the following method: mixing a silane coupling agent with water to prepare an aqueous solution with the concentration of 1-2%, adding calcined kaolin and modified vermiculite powder into the aqueous solution according to the proportion, stirring, filtering and drying to obtain the heat insulation additive.
2. The reflective heat insulation phase change latent heat material for the outer wall according to claim 1, wherein: the mesh number of the calcined kaolin is 1250 meshes, and the mesh number of the vermiculite powder is 250 meshes.
3. The reflective heat insulation phase change latent heat material for the outer wall according to claim 1, wherein: the preparation method of the modified vermiculite powder comprises the following steps: putting vermiculite powder into aqueous polyurethane solution, soaking for 10-15min, filtering, and drying at 50-60 deg.C to obtain modified vermiculite powder.
4. The reflective heat insulation phase change latent heat material for the outer wall according to claim 1, wherein: the mesh number of the talcum powder is 400-500 meshes.
5. The reflective heat insulation phase change latent heat material for the outer wall according to claim 1, wherein: the reflective pigment is titanium dioxide.
6. The reflective heat insulation phase change latent heat material for the outer wall according to claim 1, wherein: the viscosity of the hydroxypropyl methyl cellulose ether is 4-6 ten thousand mPa.s.
7. The method for preparing the reflective insulation phase change latent heat material for the outer wall according to any one of claims 1 to 6, wherein: mixing the redispersible latex powder, the cement, the reflective pigment, the titanium dioxide, the hollow glass microspheres, the phase change material, the heat insulation additive, the hydroxypropyl methyl cellulose ether and the talcum powder according to the proportion, and uniformly stirring to obtain the composite material.
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| CN112500730A (en) * | 2020-12-18 | 2021-03-16 | 北京三棵树新材料科技有限公司 | Outer wall flexible putty powder with light reflection capability and preparation method thereof |
| CN113717581A (en) * | 2021-04-09 | 2021-11-30 | 浙江绿城筑乐美城市发展有限公司 | Exterior wall coating and preparation method thereof |
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| CN101531792A (en) * | 2009-04-20 | 2009-09-16 | 四川大学 | Low-expansion coefficient polyvinyl chloride alloy material and manufacturing method thereof |
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