Nano SiO2-organosilicon coating and preparation method thereof

A kind of silicone coating and silicone technology, applied in the direction of coating, etc., can solve the problems of accelerated atomic oxygen and surface material reaction ability, aircraft surface material erosion, aircraft stop working, etc., to improve suspension stability and anti-ultraviolet aging , the effect of strengthening the protective effect

Inactive Publication Date: 2007-02-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, AO oxidizes at a rare high temperature and collides with the surface of the material at high speed, causing severe erosion of the surface material of the aircraft. In addition, because the solar ultraviolet radiation pro...

Method used

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  • Nano SiO2-organosilicon coating and preparation method thereof
  • Nano SiO2-organosilicon coating and preparation method thereof
  • Nano SiO2-organosilicon coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] nano-SiO 2 -Silicone coating, by weight percentage, its composition is as follows: Silicone resin: 82%; Nano-SiO 2 Xylene: 5%; Toluene: 3%; Butyl acetate: 3%; Dispersant: 0.4%; Leveling agent: 0.3%; Defoamer: 0.3%; Talc: 3%.

[0031] Preparation Process:

[0032] Weigh nano-SiO 2 15g powder, add 15g xylene and 15g butyl acetate, then add 0.5g dispersant (P63), stir and dissolve, then ultrasonically disperse for 20-30 minutes. Weigh 300g of silicone resin into the dispersion tank, then add 0.75g of dispersant P63, 0.75g of dispersant 963S and 0.75g of defoamer E8, stir at a slow speed (400r / min) for 5 minutes, then stir at a medium speed (rotating speed is 1000r / min, time is 5min), slowly add above-mentioned nano-SiO dispersed by ultrasonic 2 slurry. Then add 15g of talcum powder and carry out high-speed dispersion (rotating speed is 2200r / min) for 35 minutes. Put the dispersed slurry into a ball mill for grinding and dispersing (rotating at 2800r / min) for 5 hours ...

Embodiment 2

[0034] nano-SiO 2 -Silicone coating, by weight percentage, its composition is as follows: Silicone resin: 76%; Nano SiO 2 Xylene: 7%; Toluene: 3%; Butyl acetate: 3%; Dispersant: 0.4%; Leveling agent: 0.2%; Defoamer: 0.4%; Talc: 5%.

[0035] Preparation Process:

[0036] Weigh nano-SiO 230g of powder, add 30g of xylene and 18g of butyl acetate, then add 0.6g of dispersant (P63), stir and dissolve, then ultrasonically disperse for 20-30 minutes. Weigh 300g of silicone resin into the dispersion tank, then add 0.6g of dispersant P63, 1.2g of dispersant 963S and 1.2g of defoamer E8, stir at a slow speed (300r / min) for 10 minutes, then stir at a medium speed (rotational speed is 1150r / min, time is 4min), at the same time slowly add the above-mentioned ultrasonically dispersed nano-SiO 2 slurry. Then add 30g of talcum powder and carry out high-speed dispersion (rotating speed is 2400r / min) for 25 minutes. Put the dispersed slurry into a ball mill for grinding and dispersing (30...

Embodiment 3

[0038] nano-SiO 2 -Silicone coating, by weight percentage, its composition is as follows: Silicone resin: 65%; Nano-SiO 2 Xylene: 12.7%; Toluene: 3%; Butyl acetate: 3%; Dispersant: 0.6%; Leveling agent: 0.3%; Defoamer: 0.4%; Talc: 5%.

[0039] Preparation Process:

[0040] Weigh nano-SiO 2 60g powder, add 48g xylene and 18g butyl acetate, then add 1.2g dispersant (P63), stir and dissolve, then ultrasonically disperse for 20-30 minutes. Weigh 290g of silicone resin into the dispersion tank, then add 1.2g of dispersant P63, 1.2g of dispersant 963S and 1.2g of defoamer E8, stir at a slow speed (350r / min) for 8 minutes, then stir at a medium speed (rotational speed is 1200r / min, time is 3min), at the same time slowly add the above-mentioned ultrasonically dispersed nano-SiO 2 slurry. Then add 30g of talcum powder, and carry out high-speed dispersion (rotating speed is 2300r / min) for 30 minutes. Put the dispersed slurry into a ball mill for grinding and dispersing (rotating a...

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Abstract

The invention relates a nanometer SiO2- organosilicon coating and preparation method. The coating comprises the 60-82% organosilicon resin, 3-10% nanometer SiO2, 5-15% dimethylbenzene, 3-8% toluene, 3-6% butyl acetate, 0.2-0.6% dispersing agent, 0.1-0.3% levelling agent, 0.2-0.4% defoaming agent, and 3-10% talcum powder. The method comprises the following steps: 1 weighing nanometer SiO2, adding dimethylbenzene, dispersing agent and butyl acetate, disperse with ultrasonic, and getting nanometer SiO2 slurry; 2 weighing organosilicon resin, adding defoaming agent and dispersing agent, then adding nanometer SiO2 sluury and talcum powder, dispersing and grinding; 3 adding left resin, solvent and adjuvant, and dispersing. The invention can improve the erosion-resisting characteristics, protect material, and extend the life.

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 nano-SiO 2 - Silicone coatings and methods for their preparation. Background technique [0002] The most important and dangerous environmental factor in LEO is atomic oxygen (AO). In the low-earth orbit space 200-600 kilometers away from the earth, there is a rare gas with AO as the main component. Due to the high-speed movement of the aircraft, AO with a flux of 10 13 ~10 16 atoms / cm 2 And the kinetic energy of about 5eV continuously impacts the surface of the aircraft, the same as about 5×10 4 The AO of K is equivalent to the surface effect. Therefore, AO oxidizes at a rare high temperature and collides with the surface of the material at high speed, causing severe erosion of the surface material of the aircraft. In addition, because the solar ultraviolet radiation provides energy to the chemical bonds of the ...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D7/12
Inventor 张蕾韩宝旭严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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