Multifunctional heat shielding coating structure

Abstract

The utility model relates to the field of buildings, in particular to a multifunctional heat shielding coating structure. Comprising a base layer, an anti-crack coarse mortar layer, a first primer layer, an aerogel heat insulation floating coat, an aerogel primer layer and a heat reflection heat insulation coating layer which are sequentially arranged from inside to outside. The utility model provides a multifunctional heat shielding coating structure which can reduce the cracking and falling risks of a coating and improve the heat insulation performance.

Description

Technical Field

[0001] This application relates to the field of construction, and in particular to a multifunctional heat-shielding coating structure. Background Technology

[0002] The descriptions in this section provide background information related to this disclosure only and do not constitute prior art. With the increasing urgency of global building energy conservation needs, the development of exterior wall coating systems that combine high-efficiency thermal insulation, durability, and decorative functions has become a focus of the industry. In related technologies, thermal insulation coatings often rely on a single thermal barrier mechanism (such as nanoporous insulation of aerogel) or heat reflection technology (such as reflective coatings), which is insufficient to meet the comprehensive thermal shielding requirements in complex environments. For composite coating systems with multiple stacked materials (such as "thermal insulation layer + reflective layer"), thermal insulation failure often occurs due to interlayer cracking and delamination after a certain period of use. Summary of the Invention

[0003] In view of this, this application provides a multifunctional heat shield coating structure that can reduce the risk of coating cracking and peeling, and improve thermal insulation performance.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A multifunctional heat shielding coating structure is characterized by comprising, from the inside out, a base layer, a crack-resistant coarse mortar layer, a first primer layer, an aerogel heat insulation intermediate layer, an aerogel primer layer, and a heat-reflective heat insulation coating layer.

[0006] The aforementioned multifunctional heat-shielding coating structure of this application involves setting a crack-resistant coarse mortar layer on the base layer. This crack-resistant coarse mortar layer has a highly rough surface (large gravel particle size and significant unevenness). When an aerogel heat-insulating intermediate coating layer is set on the crack-resistant coarse mortar layer, the tiny protrusions and grooves on the surface of the crack-resistant coarse mortar layer increase the contact area between the intermediate coating layer and the surface of the coarse mortar, thereby enhancing the interfacial adhesion. At the same time, the nanoparticles of the intermediate coating layer can be fully embedded in the pores of the coarse mortar, forming a "locking effect," which provides better mechanical interlocking for the aerogel intermediate coating layer and can effectively solve the problems of sagging, cracking, hollowing, and detachment that are prone to occur in aerogel heat-insulating intermediate coating layers.

[0007] The aerogel primer layer contains aerogel, which is used to adjust the matching of thermal expansion coefficients, buffer the thermal stress difference between the aerogel intermediate layer and the heat-reflective insulation coating layer, and reduce the risk of coating cracking. At the same time, the aerogel primer layer can strengthen the surface of the aerogel insulation intermediate layer and prevent powdering of the intermediate layer surface. In addition, it can also enhance the adhesion between the heat-reflective insulation coating layer and the intermediate layer.

[0008] In some embodiments, a topcoat layer is also included on the heat-reflective insulating coating layer.

[0009] Furthermore, the coating layer has a radiative cooling effect. When used in conjunction with the heat-reflective insulation coating layer, it can enhance the solar heat reflection and radiative cooling effects of the heat-reflective insulation coating.

[0010] In addition, the multifunctional coating in this application consists of an aerogel heat insulation intermediate coating, an aerogel primer layer, a heat-reflective heat insulation coating layer, and a topcoat coating layer. This reduces the risk of coating cracking and peeling, and realizes a multifunctional heat shielding coating that integrates high-efficiency heat barrier, heat reflection, heat radiation, and decoration, thereby improving heat insulation performance.

[0011] In some embodiments, the solar reflectivity of the heat-reflective insulating coating layer is >0.85, and the atmospheric window emissivity is >0.9; the atmospheric window emissivity of the overlay coating layer is >0.8.

[0012] In some embodiments, the thickness of the crack-resistant coarse mortar layer on the base layer is 2-8 mm.

[0013] In some embodiments, the gravel in the crack-resistant coarse mortar layer is selected from one or more of quartz sand, manufactured sand and river sand; the mesh size of the gravel in the crack-resistant coarse mortar layer is 10-140 mesh.

[0014] In some embodiments, both the first primer layer and the aerogel primer layer are applied by roller coating or spraying in one pass.

[0015] In some embodiments, the thickness of the coating in the aerogel insulation is 2-10 mm.

[0016] In some embodiments, the aerogel insulation intermediate coating is applied using a multi-layer application method, with a final leveling layer applied. In related technologies, an additional putty layer is typically applied over the aerogel insulation intermediate coating. This approach often leads to insufficient adhesion between the putty layer and the intermediate coating, causing it to peel off. Furthermore, the aerogel intermediate coating has low mechanical strength; if the putty layer is thick, it can easily cause excessive weight on the aerogel intermediate coating, resulting in delamination. The aerogel insulation intermediate coating of this application uses a multi-layer application method with a final leveling layer. This intermediate coating serves two purposes: it provides thermal insulation and also acts as a putty leveling layer, saving the need for a separate putty layer and reducing costs.

[0017] In some embodiments, the heat-reflective insulating coating layer is applied by roller coating or spraying in two to three coats.

[0018] In some embodiments, the amount of aerogel added to the aerogel primer layer is 1-10 wt.%.

[0019] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0020] 1. This application discloses a multifunctional heat-shielding coating structure. A crack-resistant coarse mortar layer is applied to the base layer, exhibiting a highly rough surface (large gravel particle size and significant unevenness). When an aerogel insulation intermediate coating layer is applied to this layer, the micro-protrusions and grooves on the surface of the coarse mortar layer increase the contact area between the intermediate coating and the coarse mortar surface, thereby enhancing interfacial adhesion. Simultaneously, the nanoparticles of the intermediate coating layer can fully embed into the pores of the coarse mortar, forming a "locking effect," providing superior mechanical interlocking for the aerogel intermediate coating. This effectively solves the problems of sagging, cracking, and detachment that easily occur with aerogel insulation intermediate coatings.

[0021] 2. The aerogel primer layer in this application contains 1-10 wt.% aerogel, which is used to adjust the matching of thermal expansion coefficients, buffer the thermal stress difference between the aerogel intermediate layer and the heat-reflective insulation coating layer, and reduce the risk of coating cracking; at the same time, the aerogel primer layer can strengthen the surface of the aerogel insulation intermediate layer and prevent powdering of the intermediate layer surface layer; in addition, it can also enhance the adhesion between the heat-reflective insulation coating layer and the intermediate layer.

[0022] 3. The coating layer of this application has a radiative cooling effect. When used in combination with the heat-reflective insulating coating layer, it can enhance the solar heat reflection effect and radiative cooling effect of the heat-reflective insulating coating.

[0023] 4. The multifunctional coating in this application consists of an aerogel heat insulation intermediate coating, an aerogel primer layer, a heat-reflective heat insulation coating layer, and a topcoat coating layer. This reduces the risk of coating cracking and peeling, and realizes a multifunctional heat shielding coating that integrates high-efficiency heat barrier, heat reflection, heat radiation, and decoration, thereby improving heat insulation performance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0025] Labeling Explanation: 1. Base layer; 2. Crack-resistant coarse mortar layer; 3. First primer layer; 4. Aerogel heat insulation intermediate layer; 5. Aerogel primer layer; 6. Heat-reflective heat insulation coating layer; 7. Topcoat coating layer. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.

[0027] See Figure 1 This application provides a multifunctional heat shielding coating structure, which includes, from the inside out, a base layer 1, a crack-resistant coarse mortar layer 2, a first primer layer 3, an aerogel heat insulation intermediate layer 4, an aerogel primer layer 5, and a heat-reflective heat insulation coating layer 6.

[0028] This multifunctional heat-shielding coating structure features a crack-resistant coarse mortar layer 2 on the base layer 1. This layer 2 has a highly rough surface (large gravel particle size and a pronounced uneven texture). When an aerogel insulation intermediate coating layer is applied to the crack-resistant coarse mortar layer 2, the tiny protrusions and grooves on its surface increase the contact area between the intermediate coating layer and the coarse mortar surface, thereby enhancing interfacial adhesion. Simultaneously, the nanoparticles of the intermediate coating layer can fully embed into the pores of the coarse mortar, forming a "locking effect," providing superior mechanical interlocking for the aerogel intermediate coating layer 4. This effectively solves the problems of sagging, cracking, and detachment that easily occur with the aerogel insulation intermediate coating layer 4.

[0029] The aerogel primer layer contains aerogel, which is used to adjust the matching of thermal expansion coefficients and buffer the thermal stress difference between the aerogel intermediate coating layer and the heat-reflective insulating coating layer 6, reducing the risk of coating cracking. At the same time, the aerogel primer layer can reinforce the surface of the aerogel insulating intermediate coating layer and prevent powdering of the intermediate coating surface layer. In addition, it can also enhance the adhesion between the heat-reflective insulating coating layer 6 and the intermediate coating layer.

[0030] It also includes a topcoat layer 7 disposed on the heat-reflective insulating coating layer 6. The topcoat layer has a radiative cooling effect, and when used in conjunction with the heat-reflective insulating coating layer, it can enhance the solar heat reflection and radiative cooling effects of the heat-reflective insulating coating.

[0031] In addition, the multifunctional coating consists of an aerogel heat insulation intermediate coating, an aerogel primer layer, a heat-reflective heat insulation coating layer, and a topcoat coating layer. This reduces the risk of coating cracking and peeling, and realizes a multifunctional heat shielding coating that integrates high-efficiency heat barrier, heat reflection, heat radiation, and decoration, thereby improving heat insulation performance.

[0032] The solar reflectivity of the heat-reflective insulating coating layer 6 is >0.85, and the atmospheric window emissivity is >0.9; the atmospheric window emissivity of the overlay coating layer 7 is >0.8.

[0033] The thickness of the crack-resistant coarse mortar layer 2 on the base layer 1 is 2-8mm.

[0034] The gravel in the crack-resistant coarse sand mortar layer 2 is selected from one or more of quartz sand, manufactured sand and river sand; the mesh size of the gravel in the crack-resistant coarse sand mortar layer 2 is 10-140 mesh.

[0035] Both the first primer layer 3 and the aerogel primer layer 5 are applied by roller coating or spraying in one coat.

[0036] The thickness of the aerogel insulation intermediate coating 4 is 2-10mm.

[0037] The aerogel insulation intermediate coating 4 is applied in multiple coats, with the final coat used for leveling. This multiple-coat, leveling process serves two purposes: it provides insulation and also acts as a leveling layer, saving on the need for a separate putty layer and reducing costs.

[0038] The heat-reflective insulating coating layer 6 is achieved by roller coating or spraying two to three coats.

[0039] The amount of aerogel added in the aerogel primer layer 5 is 1-10 wt.%.

[0040] The first primer layer, aerogel heat insulation intermediate layer, aerogel primer layer, heat reflective heat insulation coating layer, and topcoat layer can all be achieved using commercially available materials. For example, the first primer layer can use Three Trees exterior wall primer SGD100, the aerogel heat insulation intermediate layer can use Three Trees aerogel heat insulation intermediate coating SGZ901, the aerogel primer layer can use Three Trees aerogel primer SGD800, the heat reflective heat insulation coating layer can use Three Trees energy-saving coating SGR100, and the topcoat layer can be made from the following raw materials: emulsion: 30-70 parts, filler (one or more of silicon nitride, silicon carbide, alumina, barium sulfate, titanium dioxide, diatomaceous earth, etc.): 10-30 parts, water: 15-35 parts; additives: 5-7 parts.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A multifunctional heat-shielding coating structure, characterized in that: It includes, from the inside out, a base layer (1), a crack-resistant coarse mortar layer (2), a first primer layer (3), an aerogel heat insulation intermediate layer (4), an aerogel primer layer (5), and a heat-reflective heat insulation coating layer (6); the sand and gravel in the crack-resistant coarse mortar layer (2) has a mesh size of 10-140.

2. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: It also includes a topcoat layer (7) disposed on the heat-reflective heat-insulating coating layer (6).

3. The multifunctional heat-shielding coating structure according to claim 2, characterized in that: The solar reflectivity of the heat-reflective insulating coating layer (6) is >0.85, the atmospheric window emissivity is >0.9, and the atmospheric window emissivity of the overlay coating layer (7) is >0.

8.

4. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: The thickness of the crack-resistant coarse mortar layer (2) on the base layer (1) is 2-8 mm.

5. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: Both the first primer layer (3) and the aerogel primer layer (5) are applied by roller coating or spraying in one coat.

6. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: The thickness of the aerogel insulation intermediate coating (4) is 2-10 mm.

7. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: The aerogel thermal insulation intermediate coating (4) is achieved by multiple troweling processes, and the surface is leveled in the last troweling process.

8. The multifunctional heat-shielding coating structure according to claim 1, characterized in that: The heat-reflective heat-insulating coating layer (6) is applied by roller coating or spraying in two to three coats.

Images