Preparation method of thermal insulation coating

Abstract

The preparation method of the thermal insulation coating comprises the following steps: uniformly stirring metal powder, a dispersing agent and a solvent according to a preset ratio, and grinding to obtain a mixed solution; dispersing the mixed solution; and adding organic resin, a defoaming agent, a binding agent and a rheological thixotropic agent into the mixed solution, and uniformly stirring to obtain the thermal insulation coating. The prepared heat insulation coating can effectively absorb ultraviolet rays and improve the reflectivity of the ultraviolet rays, so that the heat insulation effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and particularly to a preparation method of a heat-insulating coating. Background Art

[0002] With the development of technology, some substrates, such as optical substrates, semiconductor substrates or glass, have higher and higher requirements for sunlight heat insulation. For example, for optical substrates, ultraviolet rays can easily cause the polymer resin in the optical film to yellow, resulting in a decrease in the light reflectance and the appearance of color difference in light reflection color. For semiconductor substrates, ultraviolet irradiation is likely to affect the lifespan of semiconductor components. For glass substrates, the heat insulation requirements for ultraviolet rays are also very strict. Therefore, providing a simple and effective anti-ultraviolet heat-insulating coating is an important research topic in the industry. Summary of the Invention

[0003] The purpose of the present invention is to provide an improved preparation method of a heat-insulating coating to effectively absorb ultraviolet rays and increase the ultraviolet reflectance, thereby achieving a heat-insulating effect.

[0004] To achieve the above purpose, the present invention provides a preparation method of a heat-insulating coating, including the following steps:

[0005] Stir and grind metal powder, a dispersant and a solvent in a predetermined ratio to obtain a mixed solution;

[0006] Disperse the mixed solution; and

[0007] Add an organic resin, an antifoaming agent, a binder and a rheological thixotropic agent to the mixed solution, and stir evenly to obtain a heat-insulating coating.

[0008] Compared with the prior art, the present invention first prepares a mixed solution containing metal powder, a dispersant and a solvent. The metal powder used is inorganic fine particles, which can effectively absorb ultraviolet light. Then, an organic resin, an antifoaming agent, a binder and a rheological thixotropic agent are added, and stirred evenly to obtain a heat-insulating coating. The organic resin causes light to refract on the heat-insulating coating, extending the path of light and making it easier to contact the metal powder, thereby improving the absorption and reflection effects of ultraviolet rays. After testing, when the heat-insulating coating is coated on a substrate, such as a glass substrate, the ultraviolet reflectance is about 90%, and the heat-insulating temperature reaches 10 - 15°C.

[0009] As an embodiment, the mass ratio of the metal powder to the dispersant is 1:0.3 to 1:0.4, and the mass ratio of the metal powder to the solvent is 1:10 to 1:9.5.

[0010] As an embodiment, the metal powder includes aluminum, zinc oxide, titanium oxide, and cerium oxide.

[0011] As an example, the mass ratio of aluminum, zinc oxide, titanium oxide, and cerium oxide is 1:0.4:0.25:0.05.

[0012] As an example, the dispersant is cetyltrimethylammonium bromide. The solvent is propylene glycol monomethyl ether acetate.

[0013] As an example, the grinding includes: using a nano grinder, adjusting the rotation speed of the nano grinder to 3000 - 3500 revolutions per minute, and the grinding time is 2 - 2.5 hours.

[0014] As an example, after the grinding, the particle diameter of the metal powder is 10 - 15 nanometers.

[0015] As an example, the dispersion includes using high-pressure homogenization dispersion, and the pressure is 1000 - 1500 bar.

[0016] As an example, the organic resin is polyurethane and / or epoxypropylene resin. Detailed implementation manners

[0017] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application in combination with some examples. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific examples disclosed below.

[0018] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0019] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0020] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0021] The preparation method of the heat-insulating coating of the present invention will be further described below in conjunction with embodiments, but the present invention is not limited thereby. The method of the present invention aims to provide a preparation method of a heat-insulating coating to effectively absorb ultraviolet rays and improve the self-ultraviolet reflectivity, thereby achieving a heat-insulating effect.

[0022] An embodiment of the preparation method of the semiconductor heat-insulating coating of the present invention includes the following steps:

[0023] The metal powder, dispersant and solvent are stirred evenly and ground according to a predetermined ratio to obtain a mixed liquid;

[0024] Disperse the mixed liquid; and

[0025] Add an organic resin, defoamer, binder and rheological thixotropic agent to the mixed liquid and stir evenly to obtain a heat-insulating coating.

[0026] The present invention first prepares a mixed liquid containing metal powder, dispersant and solvent. The metal powder used is inorganic fine particles, which can effectively absorb ultraviolet light. Then, an organic resin, defoamer, binder and rheological thixotropic agent are added and stirred evenly to obtain a heat-insulating coating. The organic resin causes light to refract on the heat-insulating coating, extending the path of light and making it easier to contact the metal powder, thereby improving the absorption and reflection effects of ultraviolet rays. After testing, when the heat-insulating coating is coated on a substrate, such as a glass substrate, the ultraviolet reflectivity is about 90%, and the heat-insulating temperature reaches 10-15 °C.

[0027] Specifically, in one embodiment, the metal powder in the heat-insulating coating of the present invention is inorganic fine particles, which can effectively absorb ultraviolet light. For example, these metal powders include but are not limited to: aluminum, zinc oxide, titanium oxide, cerium oxide, or a mixture thereof. Preferably, it is titanium dioxide. Optionally, it includes silicon dioxide, zirconium oxide, aluminum oxide or a mixture thereof. The particle size of these metal powders is not limited, but after subsequent grinding, the particle diameter of the metal powder is optimally 10-15 nanometers. Specifically, in one embodiment, the metal powders of aluminum, zinc oxide, titanium oxide, and cerium oxide are accurately weighed, and the mass ratio is 1:0.4:0.25:0.05.

[0028] Preferably, the dispersant is cetyltrimethylammonium bromide and the solvent is propylene glycol methyl ether acetate. Among them, the mass ratio of the metal powder to the dispersant is 1:0.3 to 1:0.4, and the mass ratio of the metal powder to the solvent is 1:10 to 1:9.5. At this ratio, the above materials are fully stirred and then added to a nano-grinder for grinding to obtain a suitable particle size of the metal powder. In one embodiment, the rotation speed of the nano-grinder is adjusted to 3000 - 3500 revolutions per minute, and the grinding time is 2 - 2.5 hours. After grinding, the particle diameter of the metal powder is 10 - 15 nanometers.

[0029] Subsequently, the above-mentioned mixed solution is further dispersed by high-pressure homogenization, with a pressure of 1000 - 1500 bar and the number of dispersion times being 1 - 2 times, to obtain a mixed solution after high-pressure homogenization.

[0030] Next, an organic resin, an antifoaming agent, a binder, and a rheological thixotropic agent are added to the mixed solution and stirred evenly to obtain a heat-insulating coating. Specifically, the organic resin is polyurethane and / or epoxypropylene resin. Optionally, methacrylic resin, polyamide resin, epoxy resin, fluororesin, polyimide resin, polyurethane resin, alkyd resin, polyester resin, or a mixture thereof can be used. The proportion of the mixed solution is 30% - 70%. Optionally, conventional antifoaming agents, binders, and rheological thixotropic agents can be used.

[0031] Thus, the prepared heat-insulating coating can be convexly coated on the surface of any suitable substrate, such as an optical substrate, glass, alloy, computer case, cement, woodware, plastic, leather, or stone, etc. After coating, an anti-UV layer is formed on the surface, which has the effect of absorbing ultraviolet rays. For example, for glass coated with this coating, its ultraviolet reflectance is 90%, and the heat-insulating temperature is 10 - 15 °C, and the heat-insulating effect is very ideal.

[0032] In summary, the present invention first prepares a mixed solution containing a metal powder, a dispersant, and a solvent. The metal powder used is an inorganic particle, which can effectively absorb ultraviolet light. Subsequently, an organic resin, an antifoaming agent, a binder, and a rheological thixotropic agent are added and stirred evenly to obtain a heat-insulating coating. The organic resin causes light to refract on the heat-insulating coating, extending the path of the light and making it easier to contact the metal powder, thereby improving the absorption and reflection effects of ultraviolet rays. Moreover, this preparation method is very simple and has low cost, which is beneficial to industrial promotion and use.

[0033] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A preparation method of a heat-insulating coating, characterized in that, it comprises the following steps: Stirring evenly and grinding metal powder, a dispersant and a solvent according to a predetermined ratio to obtain a mixed solution; Dispersing the mixed solution; and Adding an organic resin, an antifoaming agent, a binder and a rheological thixotropic agent to the mixed solution, and stirring evenly to obtain a heat-insulating coating.

2. The preparation method of the heat-insulating coating according to claim 1, characterized in that: The mass ratio of the metal powder to the dispersant is 1:0.3 to 1:0.4, and the mass ratio of the metal powder to the solvent is 1:10 to 1:9.

5.

3. The preparation method of the heat-insulating coating according to claim 1, characterized in that: The metal powder includes aluminum, zinc oxide, titanium oxide, and cerium oxide.

4. The preparation method of the heat-insulating coating according to claim 3, characterized in that, The mass ratio of aluminum, zinc oxide, titanium oxide, and cerium oxide is 1:0.4:0.25:0.

05.

5. The preparation method of the heat-insulating coating according to claim 1, characterized in that: The dispersant is cetyltrimethylammonium bromide.

6. The preparation method of the heat-insulating coating according to claim 1, characterized in that, The solvent is propylene glycol monomethyl ether acetate.

7. The preparation method of the heat-insulating coating according to claim 1, characterized in that, The grinding includes: using a nano-grinder, adjusting the rotation speed of the nano-grinder to 3000 - 3500 revolutions per minute, and the grinding time is 2 - 2.5 hours.

8. The preparation method of the heat-insulating coating according to claim 7, characterized in that, After the grinding, the particle diameter of the metal powder is 10 - 15 nanometers.

9. The preparation method of the heat-insulating coating according to claim 1, characterized in that, The dispersion includes using high-pressure homogenization dispersion, and the pressure is 1000 - 1500 bar.

10. The preparation method of the heat-insulating coating according to claim 1, characterized in that, The organic resin is polyurethane and / or epoxypropylene resin.