SiO2 potassium silicate atomic oxygen resistant paint and its preparation method

Abstract

The present invention relates to a SiO 2 - Potassium silicate atomic oxygen protective coating and preparation method, the coating includes silicon-acrylic emulsion and slurry, the weight ratio is 0.4-0.9:1, and the slurry is calculated by weight percentage, including: potassium silicate 10-25; diethanolamine 0.2 ~0.4; sodium hexametaphosphate 0.1~0.3; dispersant 0.2~0.6; defoamer 0.1~0.4; light calcium carbonate 2~8; heavy calcium carbonate 5~12; talcum powder 2~10; mica 2~10 ; Silicon oxide 20-50; Zinc oxide 4-7; Water is the balance. Its preparation is as follows: firstly weigh potassium silicate and dissolve it in water, then add stabilizer diethanolamine and stir evenly, adjust the pH value in the range of 11 to 13 to obtain acid-modified water glass base material; then add sodium hexametaphosphate The aqueous solution obtained after dissolving is put into defoamer and dispersant; secondly, fillers such as light calcium carbonate, heavy calcium carbonate, talcum powder, mica, silicon oxide and zinc oxide are added to disperse and grind to make a slurry; finally, silicon Add the acrylic emulsion to the slurry and stir evenly. The invention is suitable for anti-atomic oxygen erosion, anti-static and anti-radiation of near-earth orbiting aircraft.

Description

technical field [0001] The invention relates to anti-corrosion and anti-radiation protection technology for the surface of a near-earth orbiter, specifically a SiO 2 - Potassium silicate atomic oxygen protection coating and preparation method. Background technique [0002] Atomic oxygen (AO) in the near-earth orbit environment is a very important environmental condition for long-term near-earth orbit vehicles (such as satellites, manned spacecraft, space stations, space shuttles and other spacecraft, as well as various space probes) . As atomic oxygen is a strong oxidant, it corrodes the surface material of the aircraft to cause mass loss, reduce the strength of the material, and change the chemical and thermal properties of the material, thus posing a hazard to the normal flight of the aircraft. [0003] Most of the space materials currently used do not have the ability to resist atomic oxygen erosion. In order to improve the ability of space materials to resist atomic ox...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of anti-atomic oxygen corrosion, antistatic and anti-radiation SiO 2 - Potassium silicate atomic oxygen protective coating, which overcomes the shortcomings of traditional inorganic coatings such as brittleness, porousness, and poor adaptability to substrate volume changes. It uses silicon oxide and zinc oxide as pigments combined with potassium silicate and silicon acrylic emulsion to make it It has the function of protecting atomic oxygen, and can improve the compactness, softness and leveling of the paint film

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