Water-based thermal insulation coating as well as preparation method and application thereof

Abstract

The invention relates to the technical field of thermal insulation coatings, and particularly discloses a water-based thermal insulation coating as well as a preparation method and application thereof. The water-based thermal insulation coating provided by the invention is prepared from the following components in parts by weight: 60 to 80 parts of acrylic resin, 8 to 15 parts of aerogel filler, 5 to 10 parts of glass beads, 2 to 3 parts of dispersing agent, 0.4 to 0.6 part of defoaming agent, 0 to 4 parts of cosolvent and 3.5 to 8.5 parts of water, the model number of the acrylic resin is MAINCOTEIC-1002; furthermore, the water-based heat insulation coating is prepared from the following components in parts by weight: 65 to 75 parts of acrylic resin, 10 to 13 parts of aerogel filler, 8 to 10 parts of glass beads, 2 to 3 parts of dispersing agent, 0.4 to 0.6 part of defoaming agent, 0 to 4 parts of cosolvent and 3.5 to 8.5 parts of water. The invention further provides a preparation method of the water-based thermal insulation coating. The water-based heat insulation coating provided by the invention has excellent heat insulation performance and environment-friendly characteristics.

Description

Technical Field

[0001] The present application relates to the technical field of thermal insulation coatings, and in particular to a water-based thermal insulation coating and a preparation method and application thereof. Background Art

[0002] With the increasing awareness of environmental protection and the improvement of energy-saving requirements, the market demand for thermal insulation coatings is growing. Traditional thermal insulation coatings mainly rely on solvent-based formulations. Although these solvent-based coatings have good thermal insulation properties, they contain a large amount of organic solvents, which will have a serious impact on the environment and human health. Therefore, the development of environmentally friendly and efficient water-based thermal insulation coatings has become an important research direction in this field.

[0003] At present, the main water-based thermal insulation coatings on the market include acrylic coatings, polyurethane coatings, etc., which have good film-forming properties and weather resistance, but poor stability and rheology. In order to deal with the above problems, the industry mainly enhances the stability and heat resistance of the coating by adding inorganic fillers such as silica and alumina, and improves the rheology and dispersibility of the coating by adding functional additives such as defoamers, dispersants and cosolvents. However, although the above-mentioned water-based thermal insulation coatings have solved the problems of environmental protection and stability in use, their effect on thermal insulation performance is still poor. Summary of the invention

[0004] In order to further improve the thermal insulation performance of water-based thermal insulation coatings, the present application provides a water-based thermal insulation coating and a preparation method and application thereof.

[0005] In the first aspect, the present application provides a water-based thermal insulation coating, which adopts the following technical solution: A water-based heat-insulating coating comprises the following components in parts by weight: 60-80 parts of acrylic resin, 8-15 parts of aerogel filler, 5-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water; the model of the acrylic resin is MAINCOTE TM IC-1002.

[0006] This application uses acrylic resin, aerogel filler, glass microspheres, etc. to prepare a water-based thermal insulation coating. The water-based thermal insulation coating not only has good environmental performance, but also has a good thermal insulation effect. Specifically, firstly, the water-based thermal insulation coating does not contain organic solvents, which greatly reduces the pollution to the environment and has good environmental protection. Secondly, MAINCOTE TMIC-1002 acrylic resin, as the main film-forming material, has good weather resistance and adhesion, and has good compatibility and bonding with aerogel fillers, glass beads, etc., and can form a dense coating on the surface of the coated object, thereby achieving a good thermal insulation effect. Aerogel fillers have extremely low thermal conductivity, which can effectively block heat conduction, while glass beads can reduce heat absorption by reflecting and scattering light, thereby significantly reducing the surface temperature of the object; especially hollow glass beads, the vacuum state in the hollow structure can further reduce the thermal conduction of gas molecules, thereby reducing the thermal conductivity coefficient and further enhancing the thermal insulation performance of the coating; the use of dispersants and defoamers ensures the stability and construction performance of the coating, avoids the generation of bubbles in the coating, and improves the quality of the coating; the addition of cosolvents can improve the interfacial bonding between the filler and the substrate, and further enhance the overall performance of the coating. In summary, the water-based thermal insulation coating provided by the present application is not only environmentally friendly, but also has excellent thermal insulation performance, its preparation process is simple, low cost, and has high market competitiveness and application prospects.

[0007] Optionally, the water-based thermal insulation coating comprises the following components in parts by weight: 65-75 parts of acrylic resin, 10-13 parts of aerogel filler, 8-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water.

[0008] In the present application, the amount of each component added to the water-based thermal insulation coating will affect the thermal insulation performance of the water-based thermal insulation coating. The present application has found through experimental research that further controlling the weight of each component within the above range will result in better thermal insulation performance of the water-based thermal insulation coating.

[0009] In some embodiments, the weight parts of the acrylic resin may be 60-65 parts, 60-70 parts, 60-75 parts, 60-80 parts, 65-70 parts, 65-75 parts, 65-80 parts, 70-75 parts, 70-80 parts or 75-80 parts.

[0010] In a specific embodiment, the weight parts of the acrylic resin may be 60 parts, 65 parts, 70 parts, 75 parts or 80 parts.

[0011] In some embodiments, the weight proportion of the glass microspheres may be 8-10 parts, 8-13 parts, 8-15 parts, 10-13 parts, 10-15 parts or 13-15 parts.

[0012] In a specific embodiment, the weight proportion of the glass microspheres may be 8 parts, 10 parts, 13 parts or 15 parts.

[0013] In some embodiments, the weight portion of the aerogel filler may be 5-8 parts or 8-10 parts.

[0014] In a specific embodiment, the weight parts of the aerogel filler may be 5 parts, 8 parts or 10 parts.

[0015] Optionally, the water-based thermal insulation coating comprises the following components in parts by weight: 70 parts of acrylic resin, 13 parts of aerogel filler, 8 parts of glass microspheres, 2.5 parts of dispersant, 0.5 parts of defoamer, 2 parts of cosolvent and 5 parts of water.

[0016] Optionally, the glass microspheres are selected from S38HS, GB-215, M45 and RUTURE 4025.

[0017] In some embodiments, the glass microspheres may be a mixture of S38HS, GB-215, and RUTURE 4025, a mixture of S38HS, M45, and RUTURE 4025, or a mixture of S38HS, GB-215, and M45.

[0018] Optionally, the glass microspheres are S38HS, GB-215 and RUTURE 4025 in a weight ratio of 2: (0.35-0.55): (0.10-0.30).

[0019] In some embodiments, the weight ratio of S38HS, GB-215 and RUTURE 4025 can be 2: (0.35-0.55): (0.10-0.30) In a specific embodiment, the weight ratio of S38HS, GB-215 and RUTURE 4025 can also be 2:0.45:0.20, 2:0.35:0.20, 2:0.55:0.20, 2:0.45:0.10 or 2:0.45:0.30.

[0020] Optionally, the dispersant is selected from Solsperse W100C and / or Tego 752, the aerogel filler is AG-DC 50, and the defoamer is VXW 6393, the cosolvent is DPM.

[0021] In a second aspect, the present application provides a method for preparing a water-based thermal insulation coating.

[0022] A method for preparing a water-based thermal insulation coating comprises the following steps: firstly, acrylic resin, aerogel filler, dispersant, defoamer, cosolvent and water are uniformly mixed to form a basic coating; then, glass microbeads are added to the basic coating, and stirred uniformly to obtain the water-based thermal insulation coating.

[0023] In a third aspect, the present application provides an application of a water-based thermal insulation coating in an insulation box.

[0024] Optionally, the coating film formed by the water-based thermal insulation coating on the insulation box has a thickness of ≥1 mm.

[0025] In a specific embodiment, the coating film formed by the water-based thermal insulation coating on the insulation box has a thickness of 1 mm.

[0026] In summary, this application has the following beneficial effects: 1. The present application adopts acrylic resin, aerogel resin and glass microbeads to prepare a water-based thermal insulation coating. On the one hand, the water-based thermal insulation coating does not use organic solvents, so it has good environmental protection performance; on the other hand, it also has good thermal insulation performance, which solves the problems of environmental protection and poor thermal insulation of existing thermal insulation coatings, and has good prospects for use and promotion.

[0027] 2. In the present application, the weight proportions of acrylic resin, aerogel filler and glass microspheres are controlled within the following ranges: 65-75 parts of acrylic resin, 10-13 parts of aerogel filler and 8-10 parts of glass microspheres, and the obtained water-based thermal insulation coating has better thermal insulation performance.

[0028] 3. This application uses a mixture of S38HS, GB-215 and RUTURE 4025 as glass beads, which can optimize the thermal insulation performance of the coating and enhance its ability to reflect and scatter heat; this application has found through experimental research that by further controlling the weight ratio of the three within the range of 2: (0.35-0.55): (0.10-0.30), the thermal insulation performance of the water-based thermal insulation coating obtained is optimal. DETAILED DESCRIPTION

[0029] The present application provides a water-based heat-insulating coating, comprising the following components in parts by weight: 60-80 parts of acrylic resin, 8-15 parts of aerogel filler, 5-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water; the model of the acrylic resin is MAINCOTE TM IC-1002. Further, the water-based thermal insulation coating comprises the following components in parts by weight: 65-75 parts of acrylic resin, 10-13 parts of aerogel filler, 8-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water.

[0030] The glass microspheres are selected from S38HS, GB-215, M45 and RUTURE 4025; further, the glass microspheres are S38HS, GB-215 and RUTURE 4025 in a weight ratio of 2: (0.35-0.55): (0.10-0.30). The dispersant is selected from Solsperse W100C and / or Tego 752, the aerogel filler is AG-DC 50, and the defoamer is VXW 6393, the cosolvent is DPM.

[0031] The preparation method of the water-based thermal insulation coating provided in the present application comprises the following steps: first, acrylic resin, aerogel filler, dispersant, defoaming agent, co-solvent and water are mixed evenly to form a base coating; then, glass microbeads are added to the base coating, stirred evenly, and the water-based thermal insulation coating is obtained.

[0032] In this application, the model of acrylic resin is MAINCOTE TM IC-1002, purchased from Dow Chemical; S38HS glass microspheres are hollow glass microspheres, purchased from 3M Company; GB-215 and M45 glass microspheres are solid glass microspheres, purchased from Anhui Kaisheng Basic Materials Technology Co., Ltd.; RUTURE 4025 are hollow glass microspheres, purchased from Shanghai Waidian International Trade Co., Ltd.; Solsperse W100C dispersant was purchased from Lubrizol; Tego 752 was purchased from Digo; AG-DC 50 was purchased from Shenzhen Zhongning Technology Co., Ltd.; VXW 6393 was purchased from Allnex; the CAS number of DPM is 34590-94-8; the raw materials, reagents, solvents, etc. used in this application can all be obtained commercially.

[0033] The present application is further described in detail below in conjunction with embodiments and performance testing experiments.

[0034] Examples 1-10 Embodiments 1-10 respectively provide a kind of water-based thermal insulation coating.

[0035] The difference between the above embodiments is that the addition amount of each component in the water-based thermal insulation coating is specifically shown in Table 1 below.

[0036] The implementation method of the water-based thermal insulation coating provided in Examples 1-10 comprises the following steps: firstly, MAINCOTE TM IC-1002 acrylic resin, AG-DC 50 aerogel filler, Solsperse W100C dispersant 2.5g, 0.5 g of VXW 6393 defoamer, 2 g of DPM cosolvent and 5 g of water were mixed evenly to form a base coating; then S38HS glass microspheres were added to the base coating and stirred evenly to obtain a water-based thermal insulation coating.

[0037] Among them, MAINCOTE TM The addition amounts of IC-1002 acrylic resin, AG-DC 50 aerogel filler and S38HS glass microspheres are shown in Table 1 below.

[0038] Table 1 Addition amount of some components in the water-based thermal insulation coating provided in Examples 1-10 Examples 11-18 Examples 11-18 each provide a water-based thermal insulation coating.

[0039] The difference between the above embodiment and embodiment 3 is that the type and ratio of glass beads in the water-based thermal insulation coating are specifically shown in Table 2 below.

[0040] Table 2 Types and ratios of glass beads in water-based thermal insulation coatings provided by Examples 11-18 Comparative Example 1 Comparative Example 1 provides a water-based thermal insulation coating.

[0041] The difference between the comparative example and Example 3 is that in the water-based thermal insulation coating, the model of the acrylic resin is BR-113 (Mitsubishi Rayon).

[0042] Comparative Example 2 Comparative Example 2 provides a water-based thermal insulation coating.

[0043] The difference between the comparative example and Example 3 is that in the water-based thermal insulation coating, the model of the acrylic resin is B842 (Covestro).

[0044] Comparative Example 3 Comparative Example 3 provides a water-based thermal insulation coating.

[0045] The difference between the comparative example and Example 3 is that in the water-based thermal insulation coating, MAINCOTE TM The added amount of IC-1002 acrylic resin is 50g.

[0046] Comparative Example 4 Comparative Example 4 provides a water-based thermal insulation coating.

[0047] The difference between the comparative example and Example 3 is that in the water-based thermal insulation coating, MAINCOTE TMThe added amount of IC-1002 acrylic resin is 90 g.

[0048] Performance testing The performance of the water-based thermal insulation coatings obtained in Examples 1-18 and Comparative Examples 1-4 was tested.

[0049] First, prepare an insulation environment box with reference to ASTM 4803 Standard Test Method for Predicting Heat Building up in PVC Building Products, and place a light simulation device (250W incandescent lamp) outside the insulation box. Place the tested box into the insulation environment box to simulate the temperature rise inside the vehicle under sunlight. The test box is an iron box, and the water-based thermal insulation coating is evenly sprayed on the inner surface of the iron box, and dried naturally at room temperature to form a 2mm water-based thermal insulation coating. Place a temperature detection instrument inside the test box. Turn on the light simulation device to continuously irradiate the insulation environment box for 1 hour, and then detect the temperature inside the test box; use the test box without thermal insulation coating as a blank control.

[0050] The internal temperature of each test box was detected respectively, and the temperature difference between the internal temperature of each test box sprayed with water-based thermal insulation coating and the internal temperature of the blank control test box was calculated. The thermal insulation effect of the water-based thermal insulation coating was evaluated by the temperature difference. The results are shown in Table 3 below.

[0051] Table 3 Thermal insulation effect test results of water-based thermal insulation coatings obtained in Examples 1-18 and Comparative Examples 1-4 / Temperature difference (℃) / Temperature difference (℃) Example 1 8.2 Example 12 16.2 Example 2 11.6 Example 13 15.7 Example 3 14.2 Embodiment 14 15.4 Example 4 12.5 Embodiment 15 15.9 Example 5 9.7 Example 16 14.8 Example 6 8.8 Embodiment 17 14.5 Example 7 13.2 Embodiment 18 14.7 Example 8 9.4 Comparative Example 1 4.6 Example 9 9.2 Comparative Example 2 5.0 Example 10 13.5 Comparative Example 3 5.2 Embodiment 11 15.5 Comparative Example 4 6.1 According to the test results in Table 3, the temperature difference between the incubator for the water-based coatings obtained in Examples 1-18 and the blank control is 8.2-16.2°C; while the temperature difference between the incubator for the water-based coatings obtained in Comparative Examples 1-4 and the blank control is 4.6-6.1°C. TM The water-based thermal insulation coating is prepared by using IC-1002 acrylic resin, and its weight is controlled within the range of 60-80 parts. The obtained water-based thermal insulation coating has good thermal insulation performance.

[0052] From the test results of Examples 1-10, it can be seen that the internal temperature difference between the insulation box of the water-based coating obtained by coating Examples 2-4, 7, and 10 and the insulation box of the blank control is 11.6-14.2°C (≥10°C); while the internal temperature difference between the insulation box of the water-based coating obtained by coating Examples 1, 5-6, and 8-9 and the insulation box of the blank control is 8.2-9.4°C (<10°C). This application further controls the weight of acrylic resin, aerogel filler, and glass microbeads in the water-based anticorrosive coating within the following range: 65-75 parts of acrylic resin, 10-13 parts of aerogel filler, and 8-10 parts of glass microbeads, and the thermal insulation performance of the obtained water-based thermal insulation coating is better.

[0053] The test results of Example 3 and Examples 11-18 show that the internal temperature difference between the incubator for the water-based coating obtained by coating Examples 11-15 and the blank control is 15.4-16.2°C (≥15°C); while the internal temperature difference between the incubator for the water-based coating obtained by coating Examples 3 and Examples 16-18 and the blank control is 14.2-14.8°C (<15°C). Therefore, it is explained that the present application further adopts a mixture of S38HS, GB-215 and RUTURE 4025 as glass microbeads, and further controls the weight ratio of the three within the range of 2: (0.35-0.55): (0.10-0.30), and the thermal insulation performance of the obtained water-based thermal insulation coating is better.

[0054] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A water-based thermal insulation coating, characterized in that: The invention comprises the following components in parts by weight: 60-80 parts of acrylic resin, 8-15 parts of aerogel filler, 5-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water; the model of the acrylic resin is MAINCOTE™ IC-1002.

2. The water-based thermal insulation coating according to claim 1, characterized in that: The water-based heat-insulating coating comprises the following components in parts by weight: 65-75 parts of acrylic resin, 10-13 parts of aerogel filler, 8-10 parts of glass microspheres, 2-3 parts of dispersant, 0.4-0.6 parts of defoamer, 0-4 parts of cosolvent and 3.5-8.5 parts of water.

3. The water-based thermal insulation coating according to claim 1, characterized in that: The water-based heat-insulating coating comprises the following components in parts by weight: 70 parts of acrylic resin, 13 parts of aerogel filler, 8 parts of glass microspheres, 2.5 parts of dispersant, 0.5 parts of defoamer, 2 parts of cosolvent and 5 parts of water.

4. The water-based thermal insulation coating according to claim 1, characterized in that: The glass microspheres are selected from S38HS, GB-215, M45 and RUTURE 4025.

5. The water-based thermal insulation coating according to claim 4, characterized in that: The glass microspheres are S38HS, GB-215 and RUTURE 4025 in a weight ratio of 2: (0.35-0.55): (0.10-0.30).

6. The water-based thermal insulation coating according to any one of claims 1 to 5, characterized in that: The dispersant is selected from Solsperse W100C and / or Tego 752, the aerogel filler is AG-DC 50, the defoamer is ADDITOL® VXW6393, and the cosolvent is DPM.

7. The method for preparing the water-based thermal insulation coating according to any one of claims 1 to 6, characterized in that: The following steps are involved: First, acrylic resin, aerogel filler, dispersant, defoamer, co-solvent and water are mixed evenly to form a base coating; then glass microbeads are added to the base coating, stirred evenly to obtain a water-based thermal insulation coating.

8. Use of the water-based thermal insulation coating according to any one of claims 1 to 6 in an insulation box.

9. The use according to claim 8, characterized in that The coating film thickness formed by the water-based thermal insulation paint on the insulation box is ≥1mm.

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