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A kind of ultraviolet radiation resistance low absorption rate inorganic white thermal control coating and preparation method thereof

A technology of thermal control coating and low absorption rate, applied in coatings, alkali metal silicate coatings, etc., can solve the problems of low solar absorption ratio and degradation of light-to-heat conversion performance, and achieve the effect of low volatility and easy production

Active Publication Date: 2021-09-28
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a UV-resistant inorganic white thermal control coating with excellent photothermal performance; mainly to solve the problem that the photothermal conversion performance of the existing inorganic white thermal control coating is greatly reduced under the action of space ultraviolet radiation Problem, propose a preparation method of inorganic white thermal control coating with low solar absorption ratio and excellent UV resistance

Method used

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  • A kind of ultraviolet radiation resistance low absorption rate inorganic white thermal control coating and preparation method thereof
  • A kind of ultraviolet radiation resistance low absorption rate inorganic white thermal control coating and preparation method thereof
  • A kind of ultraviolet radiation resistance low absorption rate inorganic white thermal control coating and preparation method thereof

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Embodiment 1

[0027] Embodiment 1: In this embodiment, by mass percentage, the composition of the inorganic thermal control coating is made of the following raw materials: 20.8wt% potassium silicate, 28.9wt% zinc oxide pigment, 0.9wt% polyoxypropylene Oxyethylene glyceryl ether, 5.7 wt% alkylaryl polyether alcohol, 0.3 wt% silicone polyether, 3.6 wt% non-ionic polyurethane and the balance water. Wherein the potassium water glass is obtained by mixing potassium silicate, potassium hydroxide and water according to the mass ratio of 8:0.5g:20.

[0028] The preparation method of the inorganic thermal control coating taking zinc oxide pigment as example, carries out according to the following specific steps:

[0029] At first 20.8wt% potassium silicate, 0.4wt% defoamer polyoxypropylene polyoxyethylene glyceryl ether (Wuhan Nengren Pharmaceutical Chemical Co., Ltd.), 5.7wt% dispersant alkylaryl polyether alcohol (Guangzhou Desong Chemical Co., Ltd.) company, model 405), 0.3wt% substrate wetting ...

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Abstract

The invention discloses an ultraviolet radiation-resistant low-absorption inorganic white thermal control coating and a preparation method thereof. The invention aims to solve the problem that the photothermal performance of the existing inorganic white paint thermal control coating is greatly degraded under the action of space ultraviolet radiation. The composition of the thermal control coating of the present invention is: water glass, white pigment, dispersant, substrate wetting agent, defoamer, thickener, and deionized water in the balance. The coating can be prepared by dispersing for 2 to 6 hours by sand milling process, and then the coating can be prepared by air spraying, brushing or scraping coating. The solar absorption ratio of the coating of the present invention is 0.11 to 0.20, the adhesion is 0 to 1 grade, and the solar absorption ratio change value is not more than 0.05 after the ultraviolet radiation resistance is 5000ESH, which meets the thermal control coating requirements of high-performance and high-reliability spacecraft. Layer performance requirements.

Description

technical field [0001] The invention belongs to the technical field of functional coatings, and in particular relates to an inorganic white thermal control coating with low absorption rate and ultraviolet radiation resistance and a preparation method thereof. Background technique [0002] Cosmic space is a high-vacuum environment, and the heat exchange between the spacecraft and the outer space is mainly in the form of thermal radiation. The spacecraft operating in the space environment is prone to generate high temperature due to solar radiation, which affects the operation of various components and equipment inside the spacecraft. Therefore, the thermophysical properties of the structural components of the spacecraft or the surface of the equipment play an important role in the radiation heat transfer state. decisive role. The function of thermal control design is to reasonably select the coating, organize the heat exchange path, process and heat exchange on the inner and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/04C09D7/61C09D7/65
CPCC09D1/04C09D7/61C09D7/65
Inventor 吴晓宏秦伟康红军卢松涛李杨姚远
Owner HARBIN INST OF TECH
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