CN113621286A - Heat-preservation and heat-insulation composite coating for outer wall and preparation method thereof - Google Patents
Heat-preservation and heat-insulation composite coating 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
- C09D143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
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Abstract
The invention discloses a heat-insulating composite coating for an external wall, which comprises, by weight, 60-80 parts of aqueous silicone-acrylic emulsion, 30-40 parts of self-made modified heat-insulating filler, 2-5 parts of self-made modified silicon-aluminum fiber, 2-5 parts of carboxymethyl cellulose, 0.5-1.5 parts of hydrogenated coconut oil and 100-200 parts of deionized water. The heat-insulating composite coating for the outer wall has excellent heat-insulating property and cracking resistance, and the invention also discloses a preparation method of the heat-insulating composite coating for the outer wall, which comprises the following steps: (1) adding the water-based silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil into deionized water, and stirring and mixing uniformly to obtain mixed emulsion; (2) and adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, stirring and mixing, performing ultrasonic treatment, and standing for a period of time while maintaining the temperature to obtain the thermal insulation composite coating for the outer wall.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a heat-preservation and heat-insulation composite coating for an external wall and a preparation method thereof.
Background
With the rapid development of economy, environmental protection consciousness is gradually deepened into people's mind, and external wall heat preservation becomes a main product for building energy conservation. For areas mainly used for heat preservation in thermal engineering design, such as severe cold areas and cold areas, external wall external heat preservation is reasonable, applicable and fast in development. For the heat engineering design, generally, only heat-insulating areas in summer and warm in winter are considered, or heat-insulating areas in summer and cold in winter mainly used for heat insulation during the heat engineering design, and a further perfect space exists for external heat insulation of some external walls, so that various heat-insulating coatings need to be reasonably selected and used according to the climatic characteristics of different areas to form a composite system, and the purposes of heat insulation, heat preservation, indoor heat environment comfort, energy conservation and consumption reduction are achieved. However, the existing heat insulation coating has the problems that the internal filler is not uniformly dispersed, the filler is easy to agglomerate in the coating, the mechanical property of a formed coating is poor, the coating is easy to crack, and the attractiveness of an outer wall is seriously influenced.
Disclosure of Invention
In view of the above, the present invention provides a thermal insulation composite coating for exterior walls to solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the heat-insulating composite coating for the outer wall comprises the following raw materials in parts by weight:
60-80 parts of waterborne silicone-acrylic emulsion, 30-40 parts of self-made modified heat-insulating filler, 2-5 parts of self-made modified silicon-aluminum fiber, 2-5 parts of carboxymethyl cellulose, 0.5-1.5 parts of hydrogenated coconut oil and 100-200 parts of deionized water, wherein the self-made modified heat-insulating filler is prepared by taking hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane as raw materials, and the self-made modified silicon-aluminum fiber is prepared by taking silicon-aluminum fiber and hydroxyethyl methacrylate as raw materials.
Further, the self-made modified heat-preservation filler comprises the following raw materials in parts by weight:
20-30 parts of hollow glass beads, 20-30 parts of nano titanium dioxide powder, 8-12 parts of vinyl trimethoxy silane and 180 parts of anhydrous ethanol.
Further, the average particle size of the hollow glass beads is 20-200nm, and the average particle size of the nano titanium dioxide powder is 10-20 nm.
Further, the preparation steps of the self-made modified heat preservation filler are as follows:
adding hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 20-40min at the power of 400-600W at normal temperature, filtering, and drying to obtain modified heat-preservation filler; the vinyl trimethoxy silane is adopted to carry out surface modification on the hollow glass beads and the nano titanium dioxide powder, the silane can coat the heat-insulating filler particles, so that the heat-insulating filler particles can be uniformly dispersed into the coating, a coating formed by the coating is stable in dispersion, the vinyl trimethoxy silane can introduce a carbon bond group on the surface of the heat-insulating filler particles, unsaturated double bonds of the carbon bond group can be copolymerized with other unsaturated monomers in the aqueous silicone-acrylic emulsion, and meanwhile, secondary coating on the heat-insulating filler particles can be further realized, the surface energy of the heat-insulating filler is reduced, the heat-insulating filler is in a stable state, the heat-insulating filler is prevented from being agglomerated, the compatibility of the heat-insulating filler in the coating is improved, and therefore, the mechanical property and the heat-insulating property of the coating formed by the coating are improved.
Further, the self-made modified silicon-aluminum fiber comprises the following raw materials in parts by weight:
80-100 parts of silicon-aluminum fiber, 8-10 parts of hydroxyethyl methacrylate, 1.6-2.0 parts of dibutyltin dilaurate and 100-120 parts of absolute ethyl alcohol.
Further, the average length of the silicon-aluminum fiber is 10-40 nm.
Further, the preparation steps of the self-made modified silicon-aluminum fiber are as follows:
(1) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the rotating speed of 200-240r/min at normal temperature to obtain a modified solution;
(2) adding the silicon-aluminum fiber into the modification liquid, placing the silicon-aluminum fiber into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 40-60min at the temperature of 70-90 ℃ and the power of 400-600W, filtering, and drying to obtain modified silicon-aluminum fiber; the silicon-aluminum fibers are modified by hydroxyethyl methacrylate, the molecular chain of the hydroxyethyl methacrylate is easy to react with the hydroxyl on the surface of the silicon-aluminum fibers under the action of organic tin, the molecular chain of the hydroxyethyl methacrylate can generate free radical copolymerization with double bonds in the aqueous silicone-acrylic emulsion, and the functional groups of the hydroxyethyl methacrylate can independently generate chemical reaction without influencing the potential effect of the other functional group, so that the hydrophilic silicon-aluminum fibers can be effectively combined with hydrophobic reclaimed rubber powder by taking the hydroxyethyl methacrylate as a coupling agent between the silicon-aluminum fibers and the aqueous silicone-acrylic emulsion, the compatibility of the silicon-aluminum fibers and the aqueous silicone-acrylic emulsion is improved, and the mechanical property of a coating film is improved.
Further, the preparation method of the heat-insulating composite coating for the outer wall comprises the following steps:
(1) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 40 to 60 minutes at the normal temperature at the rotating speed of 1000-1200r/min to obtain mixed emulsion;
(2) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 60 to 90 minutes at the temperature of between 30 and 40 ℃ at the rotating speed of 1200-1500r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 30 to 40 minutes at the power of 500-600W, preserving heat, placing the mixed emulsion for 20 to 24 hours, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the external wall.
The invention has the beneficial effects that:
(1) according to the thermal insulation composite coating for the external wall, disclosed by the invention, vinyl trimethoxy silane is used for carrying out surface modification on hollow glass beads and nano titanium dioxide powder, and silane can coat thermal insulation filler particles, so that the thermal insulation filler particles can be uniformly dispersed into the coating, a coating film formed by the coating is stably dispersed, and the vinyl trimethoxy silane can introduce a carbon bond group on the surface of the thermal insulation filler particles, unsaturated double bonds of the carbon bond group can be copolymerized with other unsaturated monomers in the aqueous silicone-acrylic emulsion, and meanwhile, secondary coating of the thermal insulation filler particles can be further realized, the surface energy of the thermal insulation filler is reduced, the thermal insulation filler is in a stable state, the thermal insulation filler is prevented from agglomerating, the compatibility of the thermal insulation filler in the coating is improved, and the mechanical property and the thermal insulation property of the coating film formed by the coating are improved.
According to the heat-insulating composite coating for the outer wall, the silicon-aluminum fiber is modified by hydroxyethyl methacrylate, the molecular chain of the hydroxyethyl methacrylate is easy to react with the hydroxyl on the surface of the silicon-aluminum fiber under the action of organic tin, the molecular chain of the hydroxyethyl methacrylate can perform free radical copolymerization with the double bond in the water-based silicone-acrylate emulsion, and the functional groups of the hydroxyethyl methacrylate can perform chemical reactions independently without affecting the potential effect of the other functional group, so that the hydrophilic silicon-aluminum fiber can be effectively combined with the polymer molecule in the silicone-acrylate emulsion by taking the hydroxyethyl methacrylate as a coupling agent between the silicon-aluminum fiber and the water-based silicone-acrylate emulsion, the compatibility of the silicon-aluminum fiber and the water-based silicone-acrylate emulsion is improved, and the mechanical property of a coating film is improved.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Respectively weighing 20-30 parts by weight of hollow glass microspheres with the average particle size of 20-200nm, 20-30 parts by weight of nano titanium dioxide powder with the average particle size of 10-20nm, 8-12 parts by weight of vinyl trimethoxy silane and 180 parts by weight of 120-substituted anhydrous ethanol;
(1) adding hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 20-40min at the power of 400-600W at normal temperature, filtering, and drying to obtain modified heat-preservation filler;
(2) respectively weighing 80-100 parts by weight of silicon-aluminum fiber with the average length of 10-40nm, 8-10 parts by weight of hydroxyethyl methacrylate, 1.6-2.0 parts by weight of dibutyltin dilaurate and 100 parts by weight of anhydrous ethanol;
(3) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the rotating speed of 200-240r/min at normal temperature to obtain a modified solution;
(4) adding the silicon-aluminum fiber into the modification liquid, placing the silicon-aluminum fiber into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 40-60min at the temperature of 70-90 ℃ and the power of 400-600W, filtering, and drying to obtain modified silicon-aluminum fiber;
(5) respectively weighing 60-80 parts of aqueous silicone-acrylic emulsion, 30-40 parts of self-made modified thermal insulation filler, 2-5 parts of self-made modified silicon-aluminum fiber, 2-5 parts of carboxymethyl cellulose, 0.5-1.5 parts of hydrogenated coconut oil and 100-200 parts of deionized water in parts by weight;
(6) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 40 to 60 minutes at the normal temperature at the rotating speed of 1000-1200r/min to obtain mixed emulsion;
(7) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 60 to 90 minutes at the temperature of between 30 and 40 ℃ at the rotating speed of 1200-1500r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 30 to 40 minutes at the power of 500-600W, preserving heat, placing the mixed emulsion for 20 to 24 hours, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the external wall.
Example 1
(1) Respectively weighing 20 parts by weight of hollow glass microspheres with the average particle size of 20nm, 20 parts by weight of nano titanium dioxide powder with the average particle size of 10nm, 8 parts by weight of vinyl trimethoxy silane and 120 parts by weight of absolute ethyl alcohol;
(2) adding hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 20min at normal temperature with the power of 400W, filtering, drying and obtaining modified heat-preservation filler;
(3) respectively weighing 80 parts by weight of silicon-aluminum fiber with the average length of 10nm, 8 parts by weight of hydroxyethyl methacrylate, 1.6 parts by weight of dibutyltin dilaurate and 100 parts by weight of absolute ethyl alcohol;
(4) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the rotating speed of 200r/min at normal temperature to obtain a modified solution;
(5) adding the silicon-aluminum fibers into the modification liquid, placing the silicon-aluminum fibers into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 40min at the temperature of 70 ℃ and with the power of 400W, filtering, and drying to obtain modified silicon-aluminum fibers;
(6) respectively weighing 60 parts of waterborne silicone-acrylic emulsion, 30 parts of self-made modified heat-preservation filler, 2 parts of self-made modified silicon-aluminum fiber, 2 parts of carboxymethyl cellulose, 0.5 part of hydrogenated coconut oil and 100 parts of deionized water in parts by weight;
(7) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 40min at the normal temperature at the rotating speed of 1000r/min to obtain mixed emulsion;
(8) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 60min at the temperature of 30 ℃ at the rotating speed of 1200r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 30min at the power of 500W, preserving the temperature, placing the mixed emulsion for 20h, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the outer wall.
Example 2
(1) Respectively weighing 25 parts by weight of hollow glass microspheres with the average particle size of 100nm, 25 parts by weight of nano titanium dioxide powder with the average particle size of 15nm, 10 parts by weight of vinyl trimethoxy silane and 150 parts by weight of absolute ethyl alcohol;
(2) adding hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 30min at normal temperature with the power of 500W, filtering, and drying to obtain a modified heat-preservation filler;
(3) respectively weighing 90 parts by weight of silicon-aluminum fiber with the average length of 25nm, 9 parts by weight of hydroxyethyl methacrylate, 1.8 parts by weight of dibutyltin dilaurate and 110 parts by weight of absolute ethyl alcohol;
(4) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the rotating speed of 220r/min at normal temperature to obtain a modified solution;
(5) adding the silicon-aluminum fibers into the modification liquid, placing the silicon-aluminum fibers into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 50min at the temperature of 80 ℃ and with the power of 500W, filtering, and drying to obtain modified silicon-aluminum fibers;
(6) respectively weighing 70 parts of waterborne silicone-acrylic emulsion, 35 parts of self-made modified heat-preservation filler, 3.5 parts of self-made modified silicon-aluminum fiber, 3.5 parts of carboxymethyl cellulose, 1 part of hydrogenated coconut oil and 150 parts of deionized water in parts by weight;
(7) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 50min at the normal temperature at the rotating speed of 1100r/min to obtain mixed emulsion;
(8) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 75min at the temperature of 35 ℃ at the rotating speed of 1400r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 35min at the power of 550W, preserving the temperature, placing the mixed emulsion for 22h, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the outer wall.
Example 3
(1) Respectively weighing 30 parts by weight of hollow glass microspheres with the average particle size of 200nm, 30 parts by weight of nano titanium dioxide powder with the average particle size of 20nm, 12 parts by weight of vinyl trimethoxy silane and 80 parts by weight of absolute ethyl alcohol;
(2) adding hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 40min at the normal temperature with the power of 600W, filtering, drying, and obtaining modified heat-preservation filler;
(3) respectively weighing 100 parts by weight of silicon-aluminum fiber with the average length of 40nm, 10 parts by weight of hydroxyethyl methacrylate, 2.0 parts by weight of dibutyltin dilaurate and 120 parts by weight of absolute ethyl alcohol;
(4) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the normal temperature at the rotating speed of 240r/min to obtain a modified solution;
(5) adding the silicon-aluminum fibers into the modification liquid, placing the silicon-aluminum fibers into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 460min at the temperature of 90 ℃ and with the power of 600W, filtering, and drying to obtain modified silicon-aluminum fibers;
(6) respectively weighing 80 parts of waterborne silicone-acrylic emulsion, 40 parts of self-made modified heat-preservation filler, 5 parts of self-made modified silicon-aluminum fiber, 5 parts of carboxymethyl cellulose, 1.5 parts of hydrogenated coconut oil and 200 parts of deionized water in parts by weight;
(7) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 60min at the normal temperature at the rotating speed of 1200r/min to obtain mixed emulsion;
(8) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 90min at the temperature of 40 ℃ at the rotating speed of 1500r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 40min at the power of 600W, preserving the temperature, placing the mixed emulsion for 24h, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the outer wall.
Example 4
In example 4, the self-made modified thermal insulation filler of the invention is replaced by the glass beads, and other conditions and component proportions are the same as those in example 1.
Example 5
In example 5, the self-made modified silica-alumina fiber of the present invention was not added, and the other conditions and the component ratio were the same as those in example 1.
Experimental example:
the heat-insulating coatings prepared in examples 1 to 5 were subjected to performance tests after being coated with films.
And (3) hardness testing, namely measuring the hardness of the heat-insulating composite coating for the outer wall according to the regulation of GB/T6739-2006 pencil determination method for coating hardness.
Tensile Strength and elongation at Break the sample strips were rectangular parallelepiped rods (6.0cmx1.0cmx0.3cm) measured according to GB/T528-1992, determination of tensile stress Strain Properties of vulcanized rubber or thermoplastic rubber.
The results of the coating performance tests are shown in table 1.
TABLE 1 data of the performance of the thermal insulation composite coating for exterior walls of examples 1-5
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Hardness of | 5H | 5H | 5H | 3H | 3H |
| Tensile strength/MPa | 2.84 | 2.85 | 2.84 | 2.17 | 2.12 |
| Elongation at break/% | 10.48 | 10.26 | 10.34 | 7.11 | 6.82 |
The performance of the examples 1 to 3 is compared, wherein the performance data of the example 2 is the most excellent, because the ratio of the added materials in the example 2 is the best, and the difference of the performance data of the examples 1 to 3 is smaller, which also reflects that the technical scheme of the application can be implemented from the side.
Comparing the performances of the embodiment 1 and the embodiment 4, because the glass beads are used for replacing the self-made modified heat-insulating filler of the invention in the embodiment 4, and other conditions and component proportions are the same as those in the embodiment 1, the hardness, tensile strength and elongation at break of the finally prepared heat-insulating composite coating for the external wall are all obviously reduced, therefore, the heat-insulating composite coating for the external wall, prepared by the invention, adopts vinyltrimethoxysilane for surface modification of the hollow glass beads and the nano titanium dioxide powder, the silane can coat the heat-insulating filler particles, so that the heat-insulating filler particles can be uniformly dispersed into the coating, a coating film formed by the coating is stably dispersed, and the vinyltrimethoxysilane can introduce carbon bond groups on the surfaces of the heat-insulating filler particles, unsaturated double bonds of the carbon bond groups can be copolymerized with other unsaturated monomers in the water-based silicone-acrylic emulsion, meanwhile, the secondary coating of the heat-insulating filler particles can be further realized, the surface energy of the heat-insulating filler is reduced, the heat-insulating filler is in a stable state, the agglomeration of the heat-insulating filler is prevented, and the compatibility of the heat-insulating filler in the coating is improved, so that the mechanical property and the heat-insulating property of a coating film formed by the coating are improved;
comparing the performances of the embodiment 1 and the embodiment 5, because the self-made modified silicon-aluminum fiber of the invention is not added in the embodiment 5, and other conditions and component proportions are the same as those in the embodiment 1, the hardness, tensile strength and elongation at break of the finally prepared thermal insulation composite coating for the external wall are all obviously reduced, therefore, the thermal insulation composite coating for the external wall prepared by the invention adopts hydroxyethyl methacrylate to modify the silicon-aluminum fiber, because the molecular chain of the hydroxyethyl methacrylate is easy to react with the hydroxyl on the surface of the silicon-aluminum fiber under the action of organic tin, the molecular chain of the hydroxyethyl methacrylate can have free radical copolymerization reaction with the double bond in the water-based silicone-acrylate emulsion, and the functional groups of the hydroxyethyl methacrylate can independently have chemical reaction without affecting the potential utility of the other functional group, therefore, the hydroxyethyl methacrylate is used as a coupling agent between the silicon-aluminum fiber and the water-based silicone-acrylate emulsion, the hydrophilic silicon-aluminum fibers can be effectively combined with polymer molecules in the silicone-acrylic emulsion, so that the compatibility of the silicon-aluminum fibers and the water-based silicone-acrylic emulsion is improved, and the mechanical property of a coating film is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The heat-insulation composite coating for the outer wall is characterized by comprising the following raw materials in parts by weight:
60-80 parts of waterborne silicone-acrylic emulsion, 30-40 parts of self-made modified heat-insulating filler, 2-5 parts of self-made modified silicon-aluminum fiber, 2-5 parts of carboxymethyl cellulose, 0.5-1.5 parts of hydrogenated coconut oil and 100-200 parts of deionized water, wherein the self-made modified heat-insulating filler is prepared by taking hollow glass beads, nano titanium dioxide powder and vinyl trimethoxy silane as raw materials, and the self-made modified silicon-aluminum fiber is prepared by taking silicon-aluminum fiber and hydroxyethyl methacrylate as raw materials.
2. The thermal insulation composite coating for the exterior wall according to claim 1, characterized in that the self-made modified thermal insulation filler comprises the following raw materials in parts by weight:
20-30 parts of hollow glass beads, 20-30 parts of nano titanium dioxide powder, 8-12 parts of vinyl trimethoxy silane and 180 parts of anhydrous ethanol.
3. The heat-insulating composite coating for the outer wall as claimed in claim 2, wherein the average particle size of the hollow glass beads is 20-200nm, and the average particle size of the nano titanium dioxide powder is 10-20 nm.
4. The thermal insulation composite coating for the exterior wall according to claim 2, wherein the self-made modified thermal insulation filler is prepared by the following steps:
adding the hollow glass beads, the nano titanium dioxide powder and the vinyltrimethoxysilane into absolute ethyl alcohol, placing the mixture into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 20-40min at the normal temperature with the power of 400-600W, filtering, and drying to obtain the modified heat-insulating filler.
5. The thermal insulation composite coating for the exterior wall according to claim 1, which is characterized by comprising the following raw materials in parts by weight:
80-100 parts of silicon-aluminum fiber, 8-10 parts of hydroxyethyl methacrylate, 1.6-2.0 parts of dibutyltin dilaurate and 100-120 parts of absolute ethyl alcohol.
6. The heat-insulating composite coating for the exterior wall as claimed in claim 5, wherein the average length of the silicon-aluminum fibers is 10-40 nm.
7. The thermal insulation composite coating for the exterior wall according to claim 5, wherein the self-made modified silicon-aluminum fiber is prepared by the following steps:
(1) adding hydroxyethyl methacrylate and dibutyltin dilaurate into absolute ethyl alcohol, and uniformly stirring at the rotating speed of 200-240r/min at normal temperature to obtain a modified solution;
(2) adding the silicon-aluminum fiber into the modification liquid, placing the silicon-aluminum fiber into an ultrasonic dispersion machine, carrying out ultrasonic treatment for 40-60min at the temperature of 70-90 ℃ and the power of 400-600W, filtering, and drying to obtain the modified silicon-aluminum fiber.
8. A preparation method of a heat-preservation and heat-insulation composite coating for an outer wall is characterized by comprising the following preparation steps:
(1) mixing the aqueous silicone-acrylate emulsion, the carboxymethyl cellulose and the hydrogenated coconut oil, placing the mixture in a high-speed shearing machine, and stirring the mixture for 40 to 60 minutes at the normal temperature at the rotating speed of 1000-1200r/min to obtain mixed emulsion;
(2) adding the self-made modified thermal insulation filler and the self-made modified silicon-aluminum fiber into the mixed emulsion, placing the mixed emulsion in a high-speed shearing machine, stirring the mixed emulsion for 60 to 90 minutes at the temperature of between 30 and 40 ℃ at the rotating speed of 1200-1500r/min, placing the mixed emulsion in an ultrasonic dispersion machine, ultrasonically dispersing the mixed emulsion for 30 to 40 minutes at the power of 500-600W, preserving heat, placing the mixed emulsion for 20 to 24 hours, and cooling the mixed emulsion to room temperature to obtain the thermal insulation composite coating for the external wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110928626.9A CN113621286A (en) | 2021-08-13 | 2021-08-13 | Heat-preservation and heat-insulation composite coating for outer wall and preparation method thereof |
Applications Claiming Priority (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987597A (en) * | 2017-11-21 | 2018-05-04 | 广西武宣金牌防水材料科技有限公司 | Heat insulating coatings used for building exterior wall and preparation method thereof |
| CN110669434A (en) * | 2019-08-29 | 2020-01-10 | 安徽天锦云节能防水科技有限公司 | Building heat-preservation and heat-insulation coating and preparation method thereof |
| CN112759994A (en) * | 2021-01-22 | 2021-05-07 | 安徽天锦云节能防水科技有限公司 | Heat-insulation heat-preservation cold-insulation coating and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987597A (en) * | 2017-11-21 | 2018-05-04 | 广西武宣金牌防水材料科技有限公司 | Heat insulating coatings used for building exterior wall and preparation method thereof |
| CN110669434A (en) * | 2019-08-29 | 2020-01-10 | 安徽天锦云节能防水科技有限公司 | Building heat-preservation and heat-insulation coating and preparation method thereof |
| CN112759994A (en) * | 2021-01-22 | 2021-05-07 | 安徽天锦云节能防水科技有限公司 | Heat-insulation heat-preservation cold-insulation coating and preparation method thereof |
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Application publication date: 20211109 |