Water-based environment-friendly high-temperature-resistant far infrared coating and preparation method thereof

Abstract

The invention relates to the technical field of coating preparation, and discloses a water-based environment-friendly high-temperature-resistant far infrared coating and a preparation method thereof. The water-based environment-friendly high-temperature-resistant far infrared coating is prepared from the following components in percentage by mass: 30%-40% of water-based matrix resin, 20%-30% of far infrared ceramic powder, 5%-15% of a high-temperature-resistant additive, 4%-6% of a water-based environment-friendly plasticizer, 1.5%-2.5% of a dispersing agent, 1.5%-2.5% of an anti-settling agent, 0.5%-2% of a defoaming agent and the balance of deionized water. Wherein the far-infrared ceramic powder is prepared from nano cerium oxide, nano yttrium oxide, nano zirconium oxide and diatomite according to the mass ratio of 1: 1: 1: 2. The water-based system raw materials are compounded, the far infrared heating efficiency and the heat resistance are improved, the coating can resist high temperature of 220-430 DEG C, the coating is not prone to falling off under the high-temperature condition, the environment-friendly property is good, the preparation method is easy to operate, and the coating is easy to prepare.

Description

Technical Field

[0001] The present invention relates to the technical field of coating preparation, and particularly relates to an aqueous environmentally friendly high-temperature resistant far-infrared coating and a preparation method thereof. Background Art

[0002] With the continuous improvement of people's living standards, electrothermal far-infrared spectrum generating devices with healthcare functions such as far-infrared electric blankets and far-infrared lamps are increasingly favored by people. These healthcare electrothermal far-infrared spectrum generating devices generally function by coating a far-infrared coating on a heating device. After being energized and heated, they emit far-infrared light with a wavelength of 6 - 14 μm and generate far-infrared radiation. Since the far-infrared spectrum with a wavelength of 6 - 14 μm emitted is similar to the solar spectrum, it is convenient for the human body to absorb, beneficial to human health, and thus achieves the effect of physical therapy and healthcare. Especially when the heating temperature reaches above 150 °C, the radiation intensity of the far-infrared coating is significantly enhanced, and the physical therapy effect is better.

[0003] However, most of the far-infrared radiation coatings used in the current market have problems such as relatively low far-infrared heating efficiency and low energy transfer efficiency due to the relatively long wavelength of far-infrared radiation. At the same time, the existing far-infrared coatings have deteriorated performance when used at high temperatures and are prone to detachment from the heating device, further reducing the use effect. In addition, the existing far-infrared coatings also have environmental protection problems caused by the use of a large amount of organic solvents for preparation. The replacement of traditional solvent-based coatings with aqueous environmentally friendly coatings has broad market prospects and extremely important environmental protection strategic significance.

[0004] Therefore, there is an urgent need to develop an aqueous environmentally friendly far-infrared coating that can withstand high temperatures. Summary of the Invention

[0005] The purpose of the present invention is to provide an aqueous environmentally friendly high-temperature resistant far-infrared coating and a preparation method thereof, which solve the problems of insufficient heating efficiency and heat resistance of the far-infrared coating in the prior art, easy detachment under high-temperature conditions, and environmental protection.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides an aqueous environmentally friendly high-temperature resistant far-infrared coating, which is made of the following components by mass percentage: 30% - 40% of an aqueous matrix resin, 20% - 30% of far-infrared ceramic powder, 5% - 15% of a high-temperature resistant additive, 4% - 6% of an aqueous environmentally friendly plasticizer, 1.5% - 2.5% of a dispersant, 1.5% - 2.5% of an anti-settling agent, 0.5% - 2% of an anti-foaming agent, and the balance of deionized water;

[0008] Among them, the far-infrared ceramic powder is composed of nano-ceria, nano-yttria, nano-zirconia and diatomite with a mass ratio of 1:1:1:2. Materials such as nano-ceria, nano-yttria and nano-zirconia have good far-infrared emission ability and high-temperature resistance characteristics. Diatomite has a porous structure. By compounding diatomite with nano-ceria, nano-yttria and nano-zirconia in a special ratio, the far-infrared radiation effect can be enhanced.

[0009] Furthermore, the particle size of the nano-ceria is 20-50 nm; the particle size of the nano-yttria is 200-300 nm; the particle size of the nano-zirconia is 50-200 nm.

[0010] Furthermore, the water-based matrix resin is selected from any one of water-based organosilicon-modified acrylic resin, water-based epoxy-modified organosilicon resin, water-based organosilicon-modified polyurethane resin, and water-based phenolic resin. These water-based film-forming substances can provide good adhesion and heat resistance, and have excellent wear and chemical resistance. At the same time, the materials are water-based and have good environmental protection.

[0011] Furthermore, the high-temperature resistant additive is composed of zinc borate, iron oxide, manganese oxide, chromium oxide and nano-magnesium oxide with a mass ratio of 1:1:1:1:1. By compounding zinc borate, iron oxide, manganese oxide, chromium oxide and nano-magnesium oxide in a special ratio, the temperature resistance and thermal stability of the coating can be improved.

[0012] Furthermore, the particle size of the nano-magnesium oxide is 100-400 nm.

[0013] Furthermore, the water-based environmental protection plasticizer is selected from any one of citrate esters, epoxy soybean oil, and dioctyl succinate. These substances can increase the flexibility and film-forming processability of the coating.

[0014] Furthermore, the dispersant is selected from any one of phosphate ester dispersants and carboxymethyl cellulose. Phosphate ester dispersants have the function of reducing the interfacial tension between liquid and solid, and can make solid particles easier to be wetted by liquid, thus playing a good dispersion effect in the water-based coating system. As an example, the phosphate ester dispersant can be selected as Clariant Hostaphat 1306. Carboxymethyl cellulose can improve the rheology and dispersibility of the coating.

[0015] Furthermore, the sedimentation inhibitor is selected from any one of fumed silica and organic bentonite. By adding a certain amount of sedimentation inhibitor, the rheological properties of the coating can be adjusted and the anti-sedimentation effect can be achieved, which can prevent the coating from sedimenting at high temperature and during storage.

[0016] Further, the defoamer is a silicone defoamer, selected from any one of BYK-028 defoamer of BYK, TEGO902W defoamer of Degussa, and ZH-7011 defoamer of Zhonghao. These defoamers have good defoaming ability. Among them, BYK-028 defoamer of BYK is a water-based defoamer, especially suitable for water-based systems. TEGO902W defoamer of Degussa not only has defoaming effect but also has certain dispersing ability. ZH-7011 defoamer of Zhonghao is a nano-level water-based high-performance silicone defoamer produced by Huangshan Zhonghao. It has the characteristics of low dosage, strong defoaming ability, long foam suppression time, no influence on gloss and transparency, no floating oil, no shrinkage holes, etc., and can achieve a balance effect among compatibility, foam suppression and rapid defoaming.

[0017] In a second aspect, the present invention also provides a preparation method of the above-mentioned water-based environmentally friendly high-temperature resistant far-infrared coating, including the following steps:

[0018] S1. Mix the far-infrared ceramic powder with deionized water, add a dispersant, and disperse for 30 min to 60 min under the condition of 2000 rpm to 3000 rpm;

[0019] S2. Add the water-based matrix resin and the high-temperature resistant additive, and stir for 60 min to 90 min under the condition of 400 rpm to 600 rpm;

[0020] S3. Add the water-based environmentally friendly plasticizer and the anti-settling agent, and continue to stir for 30 min to 45 min until completely dissolved;

[0021] S4. Finally, add the defoamer, mix well, and obtain the water-based environmentally friendly high-temperature resistant far-infrared coating.

[0022] Compared with the prior art, the present invention provides a water-based environmentally friendly high-temperature resistant far-infrared coating and its preparation method, having the following beneficial effects:

[0023] In the present invention, diatomite is compounded with nano-cerium oxide, nano-yttrium oxide, and nano-zirconium oxide in a special ratio to form a far-infrared ceramic powder, which is added to the coating system, having good far-infrared emission ability and high-temperature resistance characteristics; by adding a high-temperature resistant additive in a specific ratio, the heat resistance and thermal stability of the coating can be improved; by adding a water-based environmentally friendly plasticizer in a specific ratio, the flexibility and film-forming property of the coating are increased; by adding a dispersant in a specific ratio, the rheology and dispersibility of the coating can be improved; by adding a sedimentation agent in a specific ratio, the rheological properties of the coating can be adjusted and the anti-settling effect can be achieved; by adding a defoamer in a specific ratio, foam can be suppressed and quickly defoamed, providing film-forming property.

[0024] The present invention uses water-based system raw materials for compounding, which not only improves the far-infrared heating efficiency and heat resistance, can withstand high temperatures of 220°C to 430°C, and the coating is not easy to fall off under high-temperature conditions. At the same time, it also has good environmental protection performance.

[0025] In addition, the preparation method of the present invention is simple to operate and easy to prepare. Detailed implementation manners

[0026] The technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the examples and comparative examples, unless otherwise specified, the experimental methods used are all conventional methods, and the materials, reagents, etc. used, unless otherwise specified, can all be obtained from commercial channels.

[0028] The present invention will be further described in detail below through detailed examples.

[0029] Example 1

[0030] This example provides a water-based environmentally friendly high-temperature resistant far-infrared coating, which is made of the following components by mass percentage: 35% of water-based matrix resin, 25% of far-infrared ceramic powder, 10% of high-temperature resistant additive, 5% of water-based environmentally friendly plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of defoaming agent, and 20% of deionized water.

[0031] Among them, the water-based matrix resin is a water-based organosilicon-modified acrylic resin from Jining Tangyi Chemical Co., Ltd., with the model J-611. The water-based environmentally friendly plasticizer is epoxy soybean oil. The dispersant is a phosphate ester dispersant, and Clariant Hostaphat 1306 is selected. The anti-settling agent is fumed silica. The defoaming agent is Zhonghao ZH-7011 defoaming agent. The far-infrared ceramic powder is composed of nano-ceria, nano-yttrium oxide, nano-zirconia, and diatomaceous earth with a mass ratio of 1:1:1:2. The particle size of nano-ceria is 20 - 50nm, the particle size of nano-yttrium oxide is 200 - 300nm, and the particle size of nano-zirconia is 50 - 200nm. The high-temperature resistant additive is composed of zinc borate, iron oxide, manganese oxide, chromium oxide, and nano-magnesium oxide with a mass ratio of 1:1:1:1:1. The particle size of nano-magnesium oxide is 100 - 400nm.

[0032] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating includes the following steps:

[0033] S1. Mix the far-infrared ceramic powder with deionized water, add a dispersant, and disperse it for 40 min at 2500 rpm using a high-speed disperser.

[0034] S2. Slowly add the waterborne matrix resin and high-temperature resistant additive, and stir for 80 min at 500 rpm using a stirrer to ensure uniform mixing.

[0035] S3. Add the waterborne environmental protection plasticizer and anti-settling agent, and continue stirring for 40 min until completely dissolved.

[0036] S4. Finally, add an antifoaming agent and mix well to obtain the waterborne environmental protection high-temperature resistant far-infrared coating.

[0037] Example 2

[0038] This example provides a waterborne environmental protection high-temperature resistant far-infrared coating. The difference from Example 1 is the adjustment of the dosages of the far-infrared ceramic powder and the high-temperature resistant additive. The specific selection of each component is the same as that in Example 1. Specifically, the waterborne environmental protection high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of waterborne matrix resin, 30% of far-infrared ceramic powder, 5% of high-temperature resistant additive, 5% of waterborne environmental protection plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of antifoaming agent, and 20% of deionized water.

[0039] The preparation method of the waterborne environmental protection high-temperature resistant far-infrared coating in this example is the same as that in Example 1, so it will not be elaborated here.

[0040] Example 3

[0041] This example provides a waterborne environmental protection high-temperature resistant far-infrared coating. The difference from Example 1 is the adjustment of the dosages of the far-infrared ceramic powder and the high-temperature resistant additive. The specific selection of each component is the same as that in Example 1. Specifically, the waterborne environmental protection high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of waterborne matrix resin, 20% of far-infrared ceramic powder, 15% of high-temperature resistant additive, 5% of waterborne environmental protection plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of antifoaming agent, and 20% of deionized water.

[0042] The preparation method of the waterborne environmental protection high-temperature resistant far-infrared coating in this example is the same as that in Example 1, so it will not be elaborated here.

[0043] Example 4

[0044] This embodiment provides a water-based environmentally friendly high-temperature resistant far-infrared coating. The difference from Embodiment 1 is that the amount of far-infrared ceramic powder is increased, and the specific selection of each component is the same as that in Embodiment 1. Specifically, the water-based environmentally friendly high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of water-based matrix resin, 30% of far-infrared ceramic powder, 10% of high-temperature resistant auxiliary agent, 5% of water-based environmentally friendly plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of defoaming agent, and 15% of deionized water.

[0045] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating in this embodiment is the same as that in Embodiment 1, so it will not be elaborated here.

[0046] Embodiment 5

[0047] This embodiment provides a water-based environmentally friendly high-temperature resistant far-infrared coating. The difference from Embodiment 1 is that the amount of far-infrared ceramic powder is decreased, and the specific selection of each component is the same as that in Embodiment 1. Specifically, the water-based environmentally friendly high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of water-based matrix resin, 20% of far-infrared ceramic powder, 10% of high-temperature resistant auxiliary agent, 5% of water-based environmentally friendly plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of defoaming agent, and 25% of deionized water.

[0048] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating in this embodiment is the same as that in Embodiment 1, so it will not be elaborated here.

[0049] Embodiment 6

[0050] This embodiment provides a water-based environmentally friendly high-temperature resistant far-infrared coating. The difference from Embodiment 1 is that the amount of high-temperature resistant auxiliary agent is decreased, and the specific selection of each component is the same as that in Embodiment 1. Specifically, the water-based environmentally friendly high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of water-based matrix resin, 25% of far-infrared ceramic powder, 5% of high-temperature resistant auxiliary agent, 5% of water-based environmentally friendly plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of defoaming agent, and 25% of deionized water.

[0051] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating in this embodiment is the same as that in Embodiment 1, so it will not be elaborated here.

[0052] Embodiment 7

[0053] This embodiment provides a water-based environmentally friendly high-temperature resistant far-infrared coating. The difference from Embodiment 1 is that the amount of high-temperature resistant auxiliary agent is increased, and the specific selection of each component is the same as that in Embodiment 1. Specifically, the water-based environmentally friendly high-temperature resistant far-infrared coating is made of the following components by mass percentage: 35% of water-based matrix resin, 25% of far-infrared ceramic powder, 15% of high-temperature resistant auxiliary agent, 5% of water-based environmentally friendly plasticizer, 2% of dispersant, 2% of anti-settling agent, 1% of defoaming agent, and 15% of deionized water.

[0054] The preparation method of the waterborne environmentally friendly high-temperature resistant far-infrared coating in this example is the same as that in Example 1, so it will not be elaborated here.

[0055] Example 8

[0056] This example provides a waterborne environmentally friendly high-temperature resistant far-infrared coating. The difference from Example 1 is that the waterborne environmentally friendly plasticizer is changed to dioctyl succinate, and the others are the same as those in Example 1, so it will not be elaborated here.

[0057] Example 9

[0058] This example provides a waterborne environmentally friendly high-temperature resistant far-infrared coating. The difference from Example 1 is that the waterborne environmentally friendly plasticizer is changed to a citrate plasticizer, and the others are the same as those in Example 1, so it will not be elaborated here.

[0059] Example 10

[0060] This example provides a waterborne environmentally friendly high-temperature resistant far-infrared coating. The difference from Example 1 is that the dispersant is changed to carboxymethyl cellulose, and the others are the same as those in Example 1, so it will not be elaborated here.

[0061] Example 11

[0062] This example provides a waterborne environmentally friendly high-temperature resistant far-infrared coating. The difference from Example 1 is that the anti-settling agent is changed to organic bentonite, and the others are the same as those in Example 1, so it will not be elaborated here.

[0063] Example 12

[0064] This example provides a waterborne environmentally friendly high-temperature resistant far-infrared coating, which is made of the following components by mass percentage: 30% of waterborne matrix resin, 25% of far-infrared ceramic powder, 10% of high-temperature resistant additive, 4% of waterborne environmentally friendly plasticizer, 1.5% of dispersant, 1.5% of anti-settling agent, 1% of defoaming agent, and 27% of deionized water.

[0065] Among them, the waterborne matrix resin is the waterborne organosilicon modified polyurethane resin of Sansheng Chemical Industry, with the model of Dolphin-1089R3. The waterborne environmentally friendly plasticizer is epoxy soybean oil. The dispersant is a phosphate ester dispersant. The anti-settling agent is fumed silica. The defoaming agent is Zhonghao ZH-7011 defoaming agent. The far-infrared ceramic powder is composed of nano-cerium oxide, nano-yttrium oxide, nano-zirconium oxide and diatomite with a mass ratio of 1:1:1:2. The particle size of nano-cerium oxide is 20 - 50 nm, the particle size of nano-yttrium oxide is 200 - 300 nm, and the particle size of nano-zirconium oxide is 50 - 200 nm. The high-temperature resistant additive is composed of zinc borate, iron oxide, manganese oxide, chromium oxide and nano-magnesium oxide with a mass ratio of 1:1:1:1:1. The particle size of nano-magnesium oxide is 100 - 400 nm.

[0066] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating includes the following steps:

[0067] S1. Mix the far-infrared ceramic powder with deionized water, add a dispersant, and disperse it for 60 min under the condition of 2000 rpm using a high-speed disperser;

[0068] S2. Slowly add the water-based matrix resin and the high-temperature resistant additive, and stir for 90 min under the condition of 400 rpm using a stirrer to ensure uniform mixing;

[0069] S3. Add the water-based environmentally friendly plasticizer and the anti-settling agent, and continue stirring for 30 min until completely dissolved;

[0070] S4. Finally, add an antifoaming agent and mix well to obtain the water-based environmentally friendly high-temperature resistant far-infrared coating.

[0071] Example 13

[0072] This example provides a water-based environmentally friendly high-temperature resistant far-infrared coating, which is made of the following components by mass percentage: 40% of water-based matrix resin, 25% of far-infrared ceramic powder, 10% of high-temperature resistant additive, 6% of water-based environmentally friendly plasticizer, 2.5% of dispersant, 2.5% of anti-settling agent, 1% of antifoaming agent, and 13% of deionized water.

[0073] Among them, the water-based matrix resin is a water-based epoxy-modified silicone resin, and the water-based epoxy-modified silicone resin emulsion of Shenzhen Jipeng Silicon Fluoride Materials Co., Ltd. with the model of Sihai SH9067 is selected. The water-based environmentally friendly plasticizer is epoxy soybean oil. The dispersant is a phosphate ester dispersant. The settling agent is fumed silica. The antifoaming agent is Zhonghao ZH-7011 antifoaming agent. The far-infrared ceramic powder is composed of nano-ceria, nano-yttrium oxide, nano-zirconia, and diatomaceous earth with a mass ratio of 1:1:1:2. The particle size of nano-ceria is 20 - 50 nm, the particle size of nano-yttrium oxide is 200 - 300 nm, and the particle size of nano-zirconia is 50 - 200 nm. The high-temperature resistant additive is composed of zinc borate, iron oxide, manganese oxide, chromium oxide, and nano-magnesium oxide with a mass ratio of 1:1:1:1:1. The particle size of nano-magnesium oxide is 100 - 400 nm.

[0074] The preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating includes the following steps:

[0075] S1. Mix the far-infrared ceramic powder with deionized water, add a dispersant, and disperse it for 30 min under the condition of 3000 rpm using a high-speed disperser;

[0076] S2. Slowly add the water-based matrix resin and the high-temperature resistant additive, and stir for 60 min under the condition of 600 rpm using a stirrer to ensure uniform mixing;

[0077] S3. Add a water-based environmental protection plasticizer and an anti-settling agent, and continue stirring for 45 minutes until completely dissolved;

[0078] S4. Finally, add an anti-foaming agent and mix well to obtain the water-based environmental protection high-temperature resistant far-infrared coating.

[0079] Comparative Example 1

[0080] This comparative example provides a water-based environmental protection high-temperature resistant far-infrared coating. The difference from Example 1 is that the far-infrared ceramic powder does not contain diatomaceous earth, and the far-infrared ceramic powder is composed of nano-ceria, nano-yttrium oxide, and nano-zirconia with a mass ratio of 1:1:1. Others are the same as in Example 1, so they will not be elaborated here.

[0081] Comparative Example 2

[0082] This comparative example provides a water-based environmental protection high-temperature resistant far-infrared coating. The difference from Example 1 is that diatomaceous earth is used to replace the far-infrared ceramic powder. Others are the same as in Example 1, so they will not be elaborated here.

[0083] Comparative Example 3

[0084] This comparative example provides a water-based environmental protection high-temperature resistant far-infrared coating. The difference from Example 1 is that it does not contain a high-temperature resistant additive, and the corresponding deionized water is added to make the total amount remain 100%. Others are the same as in Example 1, so they will not be elaborated here.

[0085] Test Example

[0086] The water-based environmental protection high-temperature resistant far-infrared coatings prepared in Examples 1 to 13 and Comparative Examples 1 to 3 were respectively coated on the surface of the heating device and dried to form. The coating thickness was 300 μm. Then, the heating device was powered on for heating and heat preservation, so as to detect the properties such as heat resistance, adhesion, and normal total emissivity. The results are shown in Table 1 below. The specific detection methods are as follows:

[0087] Heat resistance: Refer to GB / T1735-1979 "Method for Determining Heat Resistance of Paint Films" to test the temperature resistance degree of the coating;

[0088] Adhesion: Refer to GB / T5210-2006 for adhesion detection;

[0089] Normal total emissivity: Refer to GB / T4653-1984 "General Technical Conditions for Infrared Radiation Coatings" to measure the normal total emissivity.

[0090] Table 1 Test Results

[0091]

[0092]

[0093] As can be seen from Table 1 above, the far-infrared spectrum generating equipment prepared with the water-based environmentally friendly high-temperature resistant far-infrared coating of each embodiment of the present invention has good heat resistance and a high normal total emissivity. Moreover, the adhesion between the water-based environmentally friendly high-temperature resistant far-infrared coating of the present invention and the equipment is high, reaching level 1 or even level 0, and it is not easy to fall off and separate from the heating equipment.

[0094] From the test results of Examples 1 to 13, it can be seen that when the specific components are selected and the preparation process parameters are within the scope defined in the present application, the effects and performance of the heating equipment can be improved.

[0095] From the test results of Example 1, Example 4, Example 5, Comparative Example 1 and Comparative Example 2, it can be seen that by using a specific far-infrared ceramic powder, it has good far-infrared emission ability and high-temperature resistance characteristics, and the far-infrared radiation effect can be enhanced by adding an appropriate amount of diatomite; by appropriately increasing the dosage of the specific far-infrared ceramic powder, the far-infrared heating effect can be well improved.

[0096] From the test results of Example 1, Example 6, Example 7 and Comparative Example 3, it can be seen that by using a specific high-temperature resistant additive, the high-temperature resistance performance and thermal stability of the coating can be improved; by appropriately increasing the dosage of the specific high-temperature resistant additive, the heat resistance of the coating can be well improved.

[0097] It can be seen that using the water-based environmentally friendly high-temperature resistant far-infrared coating of the present invention can make the far-infrared heating equipment have good use effects and a long service life.

[0098] The above embodiments are only used to exemplarily illustrate the concept and technical solutions of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

[0099] In addition, it should be understood that although this specification is described according to embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An aqueous environmentally friendly high-temperature resistant far-infrared coating, characterized in that, It is made from the following components by mass percentage: 30% - 40% of water-based matrix resin, 20% - 30% of far-infrared ceramic powder, 5% - 15% of high-temperature resistant additive, 4% - 6% of water-based environmental protection plasticizer, 1.5% - 2.5% of dispersant, 1.5% - 2.5% of anti-settling agent, 0.5% - 2% of defoaming agent and the balance of deionized water; Among them, the far-infrared ceramic powder is composed of nano cerium oxide, nano yttrium oxide, nano zirconium oxide and diatomite with a mass ratio of 1:1:1:

2.

2. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, characterized in that, The particle size of the nano cerium oxide is 20 - 50 nm; the particle size of the nano yttrium oxide is 200 - 300 nm; the particle size of the nano zirconium oxide is 50 - 200 nm.

3. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, wherein The water-based matrix resin is selected from any one of water-based silicone-modified acrylic resin, water-based epoxy-modified silicone resin, water-based silicone-modified polyurethane resin, and water-based phenolic resin.

4. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, characterized in that, The high-temperature resistant additive is composed of zinc borate, iron oxide, manganese oxide, chromium oxide and nano magnesium oxide with a mass ratio of 1:1:1:1:

1.

5. The waterborne environmentally friendly high-temperature resistant far-infrared coating according to claim 4, wherein, The particle size of the nano magnesium oxide is 100 - 400 nm.

6. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, characterized in that, The water-based environmental protection plasticizer is selected from any one of citrate esters, epoxy soybean oil, and dioctyl succinate.

7. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, wherein The dispersant is selected from any one of phosphate ester dispersants and carboxymethyl cellulose.

8. The water-based environment-friendly high-temperature resistant far-infrared coating according to claim 1, characterized in that, The settling agent is selected from any one of fumed silica and organic bentonite.

9. The water-based environmentally friendly high-temperature resistant far-infrared coating according to claim 1, wherein The defoaming agent is a silicone defoaming agent, selected from any one of BYK-028 defoaming agent of BYK, TEGO902W defoaming agent of Degussa, and ZH-7011 defoaming agent of Zhonghao.

10. A preparation method of the water-based environmentally friendly high-temperature resistant far-infrared coating according to any one of claims 1 to 9, characterized in that, It includes the following steps: S1. Mix the far-infrared ceramic powder with deionized water, add the dispersant, and disperse for 30 min - 60 min under the condition of 2000 rpm - 3000 rpm; S2. Add the water-based matrix resin and the high-temperature resistant additive, and stir for 60 min - 90 min under the condition of 400 rpm - 600 rpm; S3. Add the water-based environmental protection plasticizer and the anti-settling agent, and continue to stir for 30 min - 45 min until completely dissolved; S4. Finally, add the defoaming agent and mix well to obtain the water-based environmental protection high-temperature resistant far-infrared coating.

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