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A kind of high temperature expandable rubber heat protection material and preparation method thereof

A heat protection material and rubber technology, which is applied in the field of high temperature expandable rubber heat protection materials and its preparation, can solve the problem that the instantaneous high temperature resistance cannot meet the actual needs, so as to prevent the heat from being conducted inward, improve the comprehensive performance, and achieve good durability. The effect of instantaneous high temperature

Active Publication Date: 2022-05-24
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In many fields of aviation and aerospace, rubber materials with instantaneous high temperature resistance are required, and they must have very good flexibility before being heated, and they must be able to withstand instantaneous high temperatures during work. At present, fluororubber meets the requirements in many aspects, but the instantaneous high temperature resistance It still cannot meet the actual needs. In the current invention, a small amount of inorganic filler is added to the fluororubber, and without affecting the mechanical properties at room temperature, the high-temperature resistant surface layer is quickly formed during the high-temperature heating process, so that the fluororubber has better properties. High temperature performance

Method used

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Examples

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preparation example Construction

[0021] A preparation method of a high temperature exothermic rubber thermal protection material, the steps of the method include:

[0022] The first step: put the inorganic fillers in a certain proportion (borax a (0<a<10): silicon dioxide b (0<b<10): calcium carbonate 10-a-b), put it in a planetary mill, use anhydrous Ethanol is used as solvent, and zirconia grinding ball is used as grinding medium, and the mixture is ground for 30 to 60 minutes at a speed of 200 to 300 r / min, and then air-dried to obtain the inorganic filler mixture;

[0023] The second step: the dried inorganic filler mixture is added to the fluororubber according to a certain proportion (10-30%), and then the mixture is obtained after mechanical stirring at 100-150 rpm for 40-60 minutes;

[0024] The third step: adding the vulcanizing agent (1-6%) to the mixture, and then stirring at 60-90 rpm for 10-20 minutes to obtain the mixture;

[0025] The fourth step: paint the mixture in the mold, and then put it...

Embodiment

[0029] A preparation method of a high temperature exothermic rubber thermal protection material, the steps of the method include:

[0030] The first step: put the inorganic fillers in a certain ratio (borax 1: silicon dioxide 1: calcium carbonate 8) in a planetary mill, with anhydrous ethanol as the solvent and zirconia grinding balls as the grinding medium, at 200 rpm After grinding for a certain 30 minutes at a rotating speed per minute, and then naturally air-dried to obtain the inorganic filler mixture;

[0031] The second step: the dried inorganic filler mixture is added to the fluororubber according to a certain proportion (10%), and then the mixture is obtained after mechanical stirring at 100 rpm for 40 minutes;

[0032] The third step: adding the vulcanizing agent (1%) to the mixture, and then stirring at 60 rpm for 10 minutes to obtain the mixture;

[0033] The fourth step: paint the mixture in the mold, and then put it in an oven to react for a certain time (80°C, ...

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Abstract

The invention relates to a high-temperature expandable rubber thermal protection material and a preparation method thereof. The rubber material can be rapidly foamed into a high-temperature-resistant material in a high-temperature environment. This relates to the technical field of new rubber materials and is also a high-temperature thermal protection material technology field. Fluorine rubber without inorganic fillers was vulcanized by the same process to test various properties. The measurement results showed that the Shore hardness of fluorine rubber without inorganic fillers was 68, the tensile strength was 6.9MPa, and the temperature resistance was 317°C. High temperature resistance The temperature rise on the back is 495°C; the Shore hardness of fluororubber with inorganic filler is 89, the tensile strength of fluororubber with inorganic filler is 23.6MPa, the temperature resistance is 355°C, and the back temperature of high temperature resistance is only 27°C. And it can be seen that the thickness of the fluororubber added with inorganic filler is obviously thickened. This kind of rubber that can be foamed at high temperature has very good performance of instantaneous high temperature resistance.

Description

technical field [0001] The invention relates to a high-temperature heat-generating rubber thermal protection material and a preparation method thereof. The rubber material can be rapidly foamed into a high-temperature resistant material in a high-temperature environment, which relates to the technical field of new rubber materials and is also a high-temperature thermal protection material technology. field. High temperature refers to resistance to 150 ℃. Background technique [0002] Fluorine rubber refers to a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chain. The introduction of fluorine atoms endows rubber with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. It has been widely used in aerospace, aviation, automobiles, petroleum and household appliances and other fields. An irreplaceable key material in industry. Since 1943, it has successively...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/04C08K13/02C08K3/38C08K3/36C08K3/26C08K5/29C08J5/18
CPCC08K13/02C08K3/38C08K3/36C08K3/26C08K5/29C08J5/18C08K2003/387C08K2003/265C08L2201/08C08J2300/102C08L101/04
Inventor 王国辉张耐民付继伟陈红波赵继亮林三春杨若丽廖锡广
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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