Polycarbosilane and polysiloxane resin-based ablation-resistant composite material and preparation method thereof

A technology of polysiloxane resin and polycarbosilane, which is applied in the field of organic silicon polymer composite materials, can solve the problems of high viscosity of rubber materials, insufficient storage stability of rubber materials, and easy hydrolysis of polysilazane, etc. Low viscosity, improved ablation performance, and improved adhesion

Active Publication Date: 2020-11-10
山东山科瑞森新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN104725879B discloses an ablation-resistant organosilicon compound. The polymer matrix contains linear polymethylphenylsiloxane and polysilazane. The disadvantage is that the ceramic precursor polysilazane is easily hydrolyzed. The storage stability of the rubber is not enough; and in order to ensure the elongation of the material, high molecular weight polymethylphenylsiloxane is selected. The viscosity of the rubber is extremely high, so the rubber can only be molded first, and then the patch construction

Method used

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  • Polycarbosilane and polysiloxane resin-based ablation-resistant composite material and preparation method thereof
  • Polycarbosilane and polysiloxane resin-based ablation-resistant composite material and preparation method thereof
  • Polycarbosilane and polysiloxane resin-based ablation-resistant composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]

[0023]

[0024] Among them, vinyl phenyl silicone resin, Vi content 5.6wt.%, R / Si (the molar ratio of the two, the same below) = 1.48, Ph / R (the molar ratio of the two, the same below) = 48.62%; Carbosilane resin, Vi content 9.5wt.%, viscosity (25 ° C) 1500mpa s; crosslinking agent is phenyl hydrogen polysiloxane, hydrogen content 1.05wt.%, phenyl content 32wt.%; catalyst is A tetramethyldivinyldisiloxane complex with a platinum content of 2wt.%; ceramic fillers are made by mixing zirconium boride, zirconium oxide, aluminum oxide, and titanium dioxide in a mass ratio of 22:5:5:1.

[0025] The preparation method is as follows:

[0026] Using a grinding machine, add vinyl phenyl silicone resin, vinyl polycarbosilane resin, carbon fiber, aramid fiber, ceramic filler, and crosslinking agent in sequence, and mix the materials to obtain a rubber compound with uniform dispersion and stable performance. The viscosity ( 25°C) 9.75 Pa·s. Add catalyst, mix evenly, use va...

Embodiment 2

[0028]

[0029] Among them, vinyl phenyl silicone resin, Vi content 5.6wt.%, R / Si=1.48, Ph / R=48.62%; Vinyl polycarbosilane resin, Vi content 4.7wt.%, viscosity (25 ℃) 2800mpa. s; the crosslinking agent is phenyl hydrogen-containing polysiloxane, the hydrogen content is 0.75wt.%, and the phenyl content is 24wt.%; the catalyst is tetramethyldivinyldisiloxane complex with platinum content of 2wt.%. compound; the ceramic filler is made of zirconium boride, zirconia, alumina, and titanium dioxide in a mass ratio of 14.7:5:5:1.

[0030] The preparation method is as follows:

[0031] Using a grinding machine, add vinyl phenyl silicone resin, vinyl polycarbosilane resin, carbon fiber, aramid fiber, ceramic filler, and crosslinking agent in sequence, and mix the materials to obtain a rubber compound with uniform dispersion and stable performance. The viscosity ( 25°C) 8.6 Pa·s. Add catalyst, mix evenly, use vacuum degassing machine to remove air bubbles, and cure. After curing (cu...

Embodiment 3

[0033]

[0034]Among them, vinyl phenyl silicone resin, Vi content 3.5wt.%, R / Si=1.42, Ph / R=28.3%; Vinyl polycarbosilane resin, Vi content 1.3wt.%, viscosity (25 ℃) 2500mpa. s; the crosslinking agent is phenyl hydrogen-containing polysiloxane, the hydrogen content is 0.35wt.%, and the phenyl content is 22.5wt.%. The catalyst is tetramethyldivinyl disiloxane with a platinum content of 2wt.%. Complexes; ceramic fillers are made by mixing zirconium boride, boron nitride, chromium oxide, and aluminum oxide in a mass ratio of 10.7:2:1:5.

[0035] The preparation method is as follows:

[0036] Using a grinding machine, add vinyl phenyl silicone resin, vinyl polycarbosilane resin, carbon fiber, aramid fiber, ceramic filler, and crosslinking agent in sequence, and mix the materials to obtain a rubber compound with uniform dispersion and stable performance, with a viscosity of 9.5 (25°C) Pa·s. Add catalyst, mix evenly, use vacuum degassing machine to remove air bubbles, and cure. ...

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Abstract

The invention relates to a polycarbosilane and polysiloxane resin based ablation-resistance composite material and a preparation method thereof. The polycarbosilance and polysiloxane resin based ablation-resistance composite material is prepared by mixing and solidifying the following raw materials in parts by weight: 100 parts of vinyl phenyl silicone resin, 5-50 parts of vinyl polycarbosilane resin, 3-8 parts of carbon fiber, 1-3 parts of aramid fiber, 13-60 parts of ceramic filler, 20-45 parts of crosslinking agent and 0.001-0.05 part of catalyst. Before material solidification, the sizingmaterial viscosity is small, the mobility is high, and thus multiple kinds of construction condition requirements can be met; compared with a material using polysiloxane matrix resin alone, the material has the advantages that after material solidification, the tensile strength is significantly improved, the adhesive property requirement is met, the ablation-resistance property of the material ismore excellent, and thus the material is a thermal protection material which has a good combination property.

Description

technical field [0001] The invention relates to an ablation-resistant composite material, in particular to a polycarbosilane and polysiloxane resin-based ablation-resistant composite material and a preparation method thereof, belonging to the technical field of organosilicon polymer composite materials. Background technique [0002] With the development of aerospace, weapons and equipment, the use conditions of materials are becoming increasingly harsh, and the traditionally widely used ablation materials have gradually failed to meet the requirements of new missiles and aircraft thermal protection materials. The main component of the ablation-resistant material is the matrix resin. During the preparation of the ablation material, the resin is the binder of various fillers and additives, but the resin structure determines the thermal stability and ablation resistance of the ablation material. . For example, although phenolic resin has good heat resistance and chemical corro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/16C08L77/10C08L83/05C08K7/06C08K3/38
CPCC08K2003/2227C08K2003/2244C08K2003/2251C08K2003/2296C08K2003/385C08L83/04C08L2205/025C08L2205/035C08L83/16C08L77/10C08K7/06C08K3/38C08K3/22
Inventor 牟秋红彭丹王峰张方志李金辉
Owner 山东山科瑞森新材料科技有限公司
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