Silicone rubber-based heat-insulating coating and preparation method thereof

A technology of thermal insulation coating and silicone rubber, which is applied in the field of materials to achieve the effect of improving mechanical properties

Active Publication Date: 2018-03-06
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiency of the single-function heat-resistant coating in the prior art, the purpose of

Method used

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  • Silicone rubber-based heat-insulating coating and preparation method thereof
  • Silicone rubber-based heat-insulating coating and preparation method thereof
  • Silicone rubber-based heat-insulating coating and preparation method thereof

Examples

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Embodiment 1

[0037] This embodiment relates to a silicone rubber-based heat-resistant coating, the preparation method of which is as follows:

[0038] (1) Use a degreasing veil dipped in acetone to wipe the surface of the substrate to be sprayed clean, mix 10g of hollow glass microspheres, 2g of γ-aminopropyltriethoxysilane, 20g of white carbon black, and 100g of raw methyl silicone rubber , 3g ethyl orthosilicate, 1g dibutyltin dilaurate and 200g toluene are mixed and stirred, and after stirring, filter with 30-40 mesh metal mesh, and spray the filtrate on the surface of the substrate with a spray gun at a pressure of 0.5MPa to obtain silicone rubber Base thermal insulation coating, the thickness of the thermal insulation coating is controlled at 5mm;

[0039] (2) 15g mica, 5g silica powder, 20g white carbon black, 100g silicon mass fraction are 33% phenyl silicone rubber raw rubber, 3g tetraethyl orthosilicate, 1g dibutyltin dilaurate and 200g toluene are mixed and stirred , after stirr...

Embodiment 2

[0042] This embodiment relates to a silicone rubber-based heat-resistant coating, the preparation method of which is as follows:

[0043] (1) Use a degreasing veil dipped in acetone to wipe the surface of the substrate to be sprayed clean, 20g of hollow phenolic microspheres, 2g of γ-(methacryloyloxy)propyltrimethoxysilane, 20g of white carbon black, 100g Methyl silicone rubber raw rubber, 3g tetraethyl orthosilicate, 1g dibutyltin dilaurate and 200g toluene are mixed and stirred, and after stirring, filter with a 30-40 mesh metal mesh, and spray the filtrate on the base with a pressure of 0.5MPa with a spray gun. On the surface of the material, a silicone rubber-based heat-insulating coating is obtained, and the thickness of the heat-insulating coating is controlled to 0.1mm;

[0044] (2) 30g mica, 8g silica powder, 2g white carbon black, 100g silicon mass fraction are 42% phenyl silicone rubber raw rubber, 3g orthopropyl silicate, 1g dibutyltin dilaurate and 200g toluene are...

Embodiment 3

[0047] This embodiment relates to a silicone rubber-based heat-resistant coating, the preparation method of which is as follows:

[0048] (1) Use a degreasing veil dipped in acetone to wipe the surface of the sprayed substrate, 5g of cork powder, 2g of γ-glycidyl etheroxypropyltrimethoxysilane, 20g of white carbon black, 100g of raw methyl silicone rubber, 3g Ethyl orthosilicate, 1g of dibutyltin dilaurate and 200g of toluene are mixed and stirred, and after stirring, they are filtered with a 30-40 mesh metal mesh, and the filtrate is sprayed on the surface of the substrate with a spray gun at a pressure of 0.5MPa to obtain a silicone rubber substrate. Thermal coating, the thickness of thermal insulation coating is controlled to 2.5mm;

[0049] (2) 25g mica, 10g silica powder, 20g white carbon black, 100g silicon mass fraction are 30% phenyl silicone rubber raw rubber, 3g phenyltrimethoxysilane, 1g dibutyltin dilaurate and 200g toluene are mixed Stir, after stirring, filter w...

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Abstract

The invention provides a silicone rubber-based heat-insulating coating and a preparation method thereof. The silicone rubber-based heat-insulating coating comprises heat-insulating coating, radiationcoating and ablation coating, wherein the heat-insulating coating is arranged on the surface of a substrate; the radiation coating is arranged between the heat-insulating coating and the ablation coating; the heat-insulating coating, the radiation coating and the ablation coating are silicone rubber-based coating; the radiation coating performing an in-situ ceramization reaction through heat penetrating through the ablation coating; poly-p-phenylene benzobisoxazole fiber is distributed in the ablation coating. The preparation method comprises the steps of preparing the ablation coating, the radiation coating and the heat-insulating coating. Compared with the prior art, the silicone rubber-based heat-insulating coating has the beneficial effects as follows: through use of the poly-p-phenylene benzobisoxazole fiber, the mechanical properties of the ablation coating are improved; through the in-situ ceramization reaction, the high-radiation coating is prepared, and the defects of low mechanical properties and heat-insulating performance of the silicone rubber-based heat-insulating coating are successfully overcome; the silicone rubber-based heat-insulating coating has a wide application prospect in the field of heat protection of structural surfaces of rocket-carrying and missile weapons and the like.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a silicone rubber-based anti-heat insulation coating and a preparation method thereof. Background technique [0002] The tail of the 3350 booster module of the high-thrust launch vehicle is affected by the wake of multiple engines, and the short-term heat flow on the surface is high. The aluminum alloy surface of the booster module needs to be thermally protected to ensure its structural bearing capacity. Coatings are an effective means of thermal protection due to their ease of application and consistent quality. However, a single type of ablative heat-resistant coating has poor mechanical properties due to the addition of a large amount of inorganic heat-resistant fillers; radiation coatings are dense and complex in structure and cannot be popularized on the surface of rockets that are disposable in extreme heat flow environments; Thermal coatings are usually based on polyur...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D7/61C09D7/63C09D7/65B05D5/00B05D7/00B05D7/24
Inventor 陈一陈文旗肖旅袁勇李宝辉张小龙李中权
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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