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Spray coating type low-absorption and low-emission thermal control coating, preparation method thereof and application thereof

A heat-control coating and low-emissivity technology, applied in coatings, polyester coatings, etc., can solve problems such as unfavorable return cabin surface application, high-emissivity coating radiation heat leakage, and complex construction of multi-layer structures. , achieve excellent space environment stability, ensure resistance to space environment stability, and ensure the effect of space environment stability

Active Publication Date: 2017-04-19
BEIJING SATELLITE MFG FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Low-absorption and high-emission thermal control coatings are mainly used on the surface of extraterrestrial payloads and spacecraft radiators to reduce solar radiation and increase infrared radiation heat dissipation. However, under the conditions of the shadow area, the high emission characteristics of the coating will cause radiation heat leakage
The medium absorption and medium emission thermal control coating is mainly applied on the outer surface of the return cabin, which plays a certain role in heat preservation. However, due to the high emissivity of the coating, the temperature in the sealed cabin will drop during long-term detection activities, affecting cabin comfort
Multilayer heat insulation components have equivalent low absorption and low emission characteristics, but the construction of its multilayer structure is relatively complicated, which is not conducive to the application on the surface of the return cabin

Method used

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  • Spray coating type low-absorption and low-emission thermal control coating, preparation method thereof and application thereof
  • Spray coating type low-absorption and low-emission thermal control coating, preparation method thereof and application thereof
  • Spray coating type low-absorption and low-emission thermal control coating, preparation method thereof and application thereof

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preparation example Construction

[0034] A method for preparing a spray-coated low-absorption and low-emission thermal control coating, the steps of the method comprising:

[0035] (1) Add the filler and anti-sedimentation modifier into the solvent, and disperse evenly. When dispersing, use mechanical stirring, the stirring speed is 200-1200 rpm, and the dispersion time is 0.5-3h;

[0036] (2) Add binder to the system obtained in step (1), and stir evenly, the stirring speed is 200-1200 rpm, and the stirring time is 0.5-1h;

[0037] (3) Add catalyst and curing agent to the system obtained in step (2), and stir evenly, the stirring speed is 200-1200 rpm, and the stirring time is 5-30min, to obtain the paint material;

[0038] (4) Filter the paint material obtained in step (3) with a 120-200 mesh copper mesh to obtain a sprayable low-absorption and low-emission thermal control coating paint material.

[0039] An application of a spray-on low-absorption and low-emission thermal control coating. The sprayable low...

Embodiment 1

[0042] A spray-on low-absorption and low-emission thermal control coating, calculated as 100 parts of the binder in the thermal control coating, other compositions and mass parts in the thermal control coating are as follows:

[0043]

[0044] The binder is dihydroxy silicone resin;

[0045] The filler is flake aluminum powder;

[0046] Described anti-sedimentation modifier is KH550 silane modified coupling agent;

[0047] Described catalyst is dibutyltin dilaurate;

[0048] Described curing agent is ethyl orthosilicate;

[0049] Described solvent is butyl acetate mixture.

[0050] A method for preparing a spray-coated low-absorption and low-emission thermal control coating, the steps of the method comprising:

[0051] (1) Add aluminum powder and KH550 to the solvent, and disperse evenly. When dispersing, use mechanical stirring, the stirring speed is 500 rpm, and the dispersion time is 1.5h;

[0052] (2) Add dihydroxy silicone resin to the system obtained in step (1),...

Embodiment 2

[0057] A spray-on low-absorption and low-emission thermal control coating, calculated as 100 parts of the binder in the thermal control coating, other compositions and mass parts in the thermal control coating are as follows:

[0058]

[0059] Described binding agent is polyester resin;

[0060] The filler is flake aluminum powder;

[0061] Described anti-sedimentation modifier is KH560 silane modified coupling agent;

[0062] Described curing agent is isocyanate;

[0063] Described solvent is xylene mixture.

[0064] A method for preparing a spray-coated low-absorption and low-emission thermal control coating, the steps of the method comprising:

[0065] (1) Add the filler and KH560 to the solvent and disperse evenly. When dispersing, use mechanical stirring, the stirring speed is 800 rpm, and the dispersion time is 2 hours;

[0066] (2) Add polyester resin to the system obtained in step (1), and stir evenly, the stirring speed is 400 rpm, and the stirring time is 1h; ...

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Abstract

The invention relates to a spray coating type low-absorption and low-emission thermal control coating, a preparation method thereof and an application thereof, and belongs to the technical field of spacecraft thermal control coatings. The invention also provides a preparation method for preparing the spray coating type thermal control coating low in absorption and low in emission. Based on the method, the coating is directly sprayed and coated onto the outer surface of a spacecraft in the spray coating manner, so that the performances of low absorption and low emission are realized. On one hand, the influence of the solar irradiation on the temperature inside the spacecraft is reduced. On the other hand, the radiation and the heat leakage of the spacecraft to the space environment are reduced. Therefore, the coating has an important effect in maintaining the proper temperature of the spacecraft during the long-periodic detection activity.

Description

technical field [0001] The invention relates to a spray-coated low-absorption and low-emission thermal control coating and its preparation method and application, and belongs to the technical field of spacecraft thermal control coatings. Larger temperature fluctuations and radiation heat leakage are prone to occur under thermal working conditions. The low absorption and low emission characteristics of the coating reduce the absorption of solar radiation by the surface, and at the same time effectively reduce the radiation heat leakage of the coating to the cryogenic space , plays an important role in maintaining the suitable temperature of the low-power spacecraft in the long-period detection process. The low absorption means that the absorption rate of the coating to sunlight is not greater than 0.3, and the low emission means that the hemispherical emissivity of the coating is not greater than 0.3. Greater than 0.35. Background technique [0002] Thermal control coating i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D167/00C09D133/00C09D127/12C09D7/12
CPCC08K3/08C08K3/22C08K3/34C08K5/5425C08K5/5435C08K5/544C08K13/02C08K2003/0812C08K2003/166C08K2003/2296C09D7/61C09D7/63C09D127/12C09D133/00C09D167/00C09D183/06
Inventor 张家强白晶莹崔庆新王兵存平托吕伟娜马刚于金花周华珍吴琼贺光辉张学
Owner BEIJING SATELLITE MFG FACTORY
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