Thermal radiation barrier (heat insulation) coating for building exterior wall

Abstract

The invention discloses a heat radiation barrier (heat insulation) coating for a building outer wall, and belongs to the technical field of building material processing, and the heat radiation barrier (heat insulation) coating is prepared by the following steps: S1, preparing a base material and functional components; s2, mixing and dispersing; s3, grinding and filtering; and S4, blending and packaging. By adding the efficient metal oxide type infrared reflective pigment (such as antimony oxide or indium tin oxide) and the hollow microspheres, the reflective capability of the coating on infrared radiation in sunlight and the blocking effect on heat transfer are remarkably improved, and the solar heat absorption of a building outer wall is effectively reduced, so that the heat insulation performance of a building is improved, and the service life of the building is prolonged. And the energy consumption of refrigeration equipment such as an air conditioner is reduced. The addition of barite not only increases the thickness of the coating, but also improves the overall stability and mechanical strength of the coating. Meanwhile, by adding the light stabilizer and the ultraviolet light absorber, the destructive effect of ultraviolet rays on the coating is effectively resisted, the service life of the coating is prolonged, and the maintenance cost caused by aging or fading of the coating is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to a heat radiation barrier (heat insulation) coating for building exterior walls. Background Art

[0002] In the construction industry, as energy conservation, emission reduction and green building concepts are deeply rooted in people's minds, improving the thermal insulation performance of building exterior walls has become one of the important measures to reduce energy consumption and improve the indoor environment. Traditional building exterior wall thermal insulation methods, such as the use of insulation boards, rock wool and other insulation materials, can effectively block heat transfer to a certain extent, but these materials often have problems such as complex construction, high cost, and insufficient environmental protection performance.

[0003] In recent years, coating technology has developed rapidly. Among them, thermal radiation barrier (thermal insulation) coatings, as a new type of exterior wall insulation material, have attracted much attention due to their simple construction, low cost, and superior environmental performance. However, most of the existing thermal insulation coatings have problems such as poor insulation effect, poor durability, and easy aging and fading, which makes it difficult to meet the comprehensive needs of modern buildings for efficient insulation, long-term stability and aesthetics. Summary of the invention

[0004] The purpose of the present invention is to provide a heat radiation barrier (heat insulation) coating for building exterior walls in view of the existing problems.

[0005] The present invention is achieved through the following technical solutions: A heat radiation barrier (heat insulation) coating for building exterior walls comprises the following steps: S1: Configuration of base material and functional components: Use high-performance synthetic resin as the base material of the coating, with a weight percentage of 40%-60%, add infrared pigments, with a weight percentage of 5%-15% to reflect infrared thermal radiation, add hollow microspheres, with a weight percentage of 10%-25% to form air cavities to block heat transfer, add barite, with a weight percentage of 5%-15% to increase coating thickness and stability, add dispersants, defoamers, and leveling agents as additives for the coating, with a total weight percentage of no more than 5% to improve the construction performance and stability of the coating; S2: Mixing and dispersing: Mix the base material, functional pigments and fillers and additives in the above proportions, and disperse them through a high-speed disperser to ensure that the components are fully mixed and dispersed evenly. The dispersion speed is controlled at 1500-2500 rpm; S3: Grinding and filtering: The mixed paint is ground through a grinding device to refine the particle size of the paint to 20-50 microns, improve the flatness and glossiness of the coating, and remove impurities and particles in the paint through a filter to ensure the purity of the paint. The filter accuracy is 5-10 microns; S4: Mixing and packaging: Mix the paint according to the formula requirements of the paint, adjust its viscosity to 50-150 seconds (measured using a Tu-4 cup), and the leveling property complies with the GB / T 9756 standard. After mixing, fill and package the paint for subsequent use. The packaging container is a plastic barrel or metal barrel with good sealing properties.

[0006] Furthermore, the infrared pigment is a metal oxide type infrared reflective pigment, specifically antimony oxide or indium tin oxide, which can effectively reflect infrared radiation in sunlight, reduce the absorption of infrared thermal radiation by the exterior wall, and thus improve the thermal insulation performance of the coating.

[0007] Furthermore, the hollow microspheres are glass or ceramic lightweight microspheres with high closed porosity and low thermal conductivity, and can form an effective heat insulation barrier in the coating to further block the transfer of heat.

[0008] Furthermore, in step S1, a light stabilizer and a UV absorber are added to improve the durability of the coating under sunlight and prevent aging or fading of the coating due to UV radiation.

[0009] Furthermore, in step S2, a pre-mixing step is performed before the dispersion treatment, that is, the base material is preliminarily mixed with some functional pigments and fillers (such as infrared pigments and hollow microspheres) to improve the efficiency and uniformity of the subsequent dispersion treatment.

[0010] Furthermore, in step S4, a small sample test is carried out before the mixing process to verify whether the various performance indicators of the coating (such as viscosity, leveling, thermal insulation performance, etc.) meet the design requirements, and necessary adjustments are made based on the test results.

[0011] Furthermore, in step S1, phase change material microcapsules are added, and the specific preparation steps of the phase change material microcapsules are: (1) Select wall material: the phase change material is n-octadecane and the wall material is polyurethane; (2) Preparation of phase change material: heat n-octadecane to a molten state and add an emulsifier and a stabilizer; (3) Wall material emulsification: dissolve the polyurethane in a suitable solvent and emulsify the polyurethane into tiny droplets through an emulsification device; (4) Phase change material mixing: molten n-octadecane is mixed with polyurethane emulsion, and the polyurethane is solidified through chemical cross-linking reaction to form microcapsules encapsulating n-octadecane. The thickness of the polyurethane wall material is 10% of the diameter of the microcapsule. (5) Drying: The microcapsules are washed, dried and sieved to obtain phase change material microcapsules with uniform particle size. The particle size of the microcapsules is controlled to be 5-20 microns.

[0012] Customized encapsulated phase change material microcapsules can form stable energy storage units in the paint, effectively regulating temperature fluctuations on the building's exterior walls while avoiding rupture and leakage of the microcapsules during the preparation and use of the paint.

[0013] Compared with the prior art, the present invention has the following advantages: 1. Excellent thermal insulation performance: By adding high-efficiency metal oxide infrared reflective pigments (such as antimony oxide or indium tin oxide) and hollow microspheres, the present invention significantly improves the coating's ability to reflect infrared radiation from sunlight and its barrier effect on heat transfer, effectively reducing the building's exterior wall's absorption of solar heat, thereby improving the building's thermal insulation performance and reducing the energy consumption of refrigeration equipment such as air conditioners.

[0014] 2. Enhanced coating stability and durability: The addition of barite not only increases the thickness of the coating, but also improves the overall stability and mechanical strength of the coating. At the same time, the addition of light stabilizers and UV absorbers effectively resists the destructive effects of UV rays on the coating, prolongs the service life of the coating, and reduces maintenance costs caused by coating aging or fading.

[0015] 3. Fine particle size and excellent coating effect: Through high-precision grinding and filtering processes, the present invention refines the particle size of the coating to 20-50 microns, significantly improving the flatness and glossiness of the coating, making the exterior walls of the building more beautiful after coating. At the same time, the customized encapsulated phase change material microcapsules form a stable energy storage unit in the coating, further enhancing the comprehensive performance of the coating. DETAILED DESCRIPTION Example

[0016] A heat radiation barrier (heat insulation) coating for building exterior walls comprises the following steps: S1: Configuration of base material and functional components: high-performance synthetic resin is selected as the base material of the coating, with a weight percentage of 60%, infrared pigment is added, with a weight percentage of 12% to reflect infrared heat radiation, hollow microspheres are added, with a weight percentage of 13% to form air cavities to block heat transfer, barite is added, with a weight percentage of 12% to increase coating thickness and stability, dispersant, defoamer, and leveling agent are added as additives of the coating, with a total weight percentage of 3% to improve the construction performance and stability of the coating; S2: Mixing and dispersing: Mix the base material, functional pigments and fillers and additives in the above proportions and disperse them through a high-speed disperser to ensure that all components are fully mixed and dispersed evenly. The dispersion speed is controlled at 2000 rpm; S3: Grinding and filtering: The mixed paint is ground through a grinding device to refine the paint particle size to 20 microns, improve the flatness and glossiness of the coating, and remove impurities and particles in the paint through a filter to ensure the purity of the paint. The filter accuracy is 5 microns; S4: Mixing and packaging: Mix the paint according to the formula requirements of the paint, adjust its viscosity to 100 seconds (measured using a Tu-4 cup), and the leveling property complies with the GB / T 9756 standard. After mixing, fill and package the paint for subsequent use. The packaging container is a plastic barrel or metal barrel with good sealing properties.

[0017] The infrared pigment is a metal oxide type infrared reflective pigment, specifically antimony oxide or indium tin oxide, which can effectively reflect infrared radiation in sunlight, reduce the absorption of infrared thermal radiation by the exterior wall, and thus improve the thermal insulation performance of the coating.

[0018] The hollow microspheres are glass or ceramic lightweight microspheres with high closed porosity and low thermal conductivity, and can form an effective heat insulation barrier in the coating to further block the transfer of heat.

[0019] In the S1 step, light stabilizers and UV absorbers are also added to improve the durability of the coating under sunlight exposure and prevent aging or fading of the coating due to UV exposure.

[0020] In step S2, a pre-mixing step is also carried out before the dispersion treatment, that is, the base material and some functional pigments and fillers (such as infrared pigments and hollow microspheres) are preliminarily mixed to improve the efficiency and uniformity of the subsequent dispersion treatment.

[0021] In step S4, before the mixing process, a small sample test is also carried out to verify whether the various performance indicators of the coating (such as viscosity, leveling, thermal insulation performance, etc.) meet the design requirements, and necessary adjustments are made based on the test results.

[0022] In step S1, phase change material microcapsules are added, and the specific preparation steps of the phase change material microcapsules are: (1) Select wall material: the phase change material is n-octadecane and the wall material is polyurethane; (2) Preparation of phase change material: heat n-octadecane to a molten state and add an emulsifier and a stabilizer; (3) Wall material emulsification: dissolve the polyurethane in a suitable solvent and emulsify the polyurethane into tiny droplets through an emulsification device; (4) Phase change material mixing: molten n-octadecane is mixed with polyurethane emulsion, and the polyurethane is solidified through chemical cross-linking reaction to form microcapsules encapsulating n-octadecane. The thickness of the polyurethane wall material is 10% of the diameter of the microcapsule. (5) Drying: The microcapsules are washed, dried and sieved to obtain phase change material microcapsules with uniform particle size. The particle size of the microcapsules is controlled at 10 microns.

[0023] Customized encapsulated phase change material microcapsules can form stable energy storage units in the paint, effectively regulating temperature fluctuations on the building's exterior walls while avoiding rupture and leakage of the microcapsules during the preparation and use of the paint.

[0024] The performance indicators of the building thermal radiation barrier (thermal insulation) coating embodiment are as follows:

[0025] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A heat radiation barrier (thermal insulation) coating for building exterior walls, characterized in that: The specific preparation steps are: S1: Configuration of base material and functional components: Use high-performance synthetic resin as the base material of the coating, with a weight percentage of 40%-60%, add infrared pigments, with a weight percentage of 5%-15%, add hollow microspheres, with a weight percentage of 10%-25%, add barite, with a weight percentage of 5%-15%, add dispersants, defoamers, and leveling agents as coating additives, and their total weight percentage does not exceed 5%; S2: Mixing and dispersing: Mix the base material, functional pigments and fillers and additives in the above proportions, and disperse them by a high-speed disperser at a dispersing speed of 1500-2500 rpm; S3: Grinding and filtering: The mixed paint is ground through a grinding device to refine the paint particle size to 20-50 microns, and the impurities and particles in the paint are removed through a filter with a filter accuracy of 5-10 microns; S4: Mixing and packaging: Finally, mix the paint to adjust its viscosity, leveling and other performance indicators, and adjust its viscosity to 50-150 seconds (measured using a Tu-4 cup). After mixing, fill and package the paint for subsequent use.

2. A heat radiation barrier (insulation) coating for building exterior walls according to claim 1, characterized in that: The infrared pigment is a metal oxide type infrared reflective pigment, specifically antimony oxide or indium tin oxide.

3. A heat radiation barrier (thermal insulation) coating for building exterior walls according to claim 1, characterized in that: The hollow microspheres are glass or ceramic lightweight microspheres.

4. The heat radiation barrier (thermal insulation) coating for building exterior walls according to claim 1, characterized in that: In step S1, a certain amount of light stabilizer and ultraviolet absorber are also added.

5. The heat radiation barrier (insulation) coating for building exterior walls according to claim 1, characterized in that: In step S2, a pre-mixing step is also carried out before the dispersion treatment, that is, the base material and some functional pigments and fillers (such as infrared pigments and hollow microspheres) are preliminarily mixed.

6. The heat radiation barrier (thermal insulation) coating for building exterior walls according to claim 1, characterized in that: In step S4, a small sample test is carried out before the mixing process, and necessary adjustments are made based on the test results.

7. The heat radiation barrier (insulation) coating for building exterior walls according to claim 1, characterized in that: In step S1, phase change material microcapsules are added, and the specific preparation steps of the phase change material microcapsules are: (1) Select wall material: the phase change material is n-octadecane and the wall material is polyurethane; (2) Preparation of phase change material: heat n-octadecane to a molten state and add an emulsifier and a stabilizer; (3) Wall material emulsification: dissolve the polyurethane in a suitable solvent and emulsify the polyurethane into tiny droplets through an emulsification device; (4) Phase change material mixing: molten n-octadecane is mixed with polyurethane emulsion, and the polyurethane is solidified through chemical cross-linking reaction to form microcapsules encapsulating n-octadecane. The thickness of the polyurethane wall material is 10% of the diameter of the microcapsule. (5) Drying: The microcapsules are washed, dried and sieved to obtain phase change material microcapsules with uniform particle size. The particle size of the microcapsules is controlled to be 5-20 microns.

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