A space-grade antistatic sealing material and its preparation method and application

A sealing material and antistatic technology, applied in the field of antistatic sealing material and its preparation, can solve the problems of compression permanent deformation, deterioration of heat resistance comprehensive performance, etc., and achieve good mechanical properties, excellent high temperature aging resistance, and space resistance. Excellent effect of irradiation performance

Active Publication Date: 2021-09-03
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, superconducting carbon black is usually added to silicone rubber to make the material have antistatic properties. In order to ensure that the volume resistivity of the material is lower than 10 7 Ω·cm, the amount of superconducting carbon black is usually more than 20% of the mass of silicone rubber, resulting in deterioration of the comprehensive properties of the material such as compression set and heat resistance

Method used

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  • A space-grade antistatic sealing material and its preparation method and application
  • A space-grade antistatic sealing material and its preparation method and application
  • A space-grade antistatic sealing material and its preparation method and application

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preparation example Construction

[0041] An embodiment of the present invention provides a method for preparing a space-grade antistatic sealing material, comprising the following steps:

[0042] (1) Take raw materials according to the following ratio:

[0043] 100 parts by mass of silicone rubber, 40 to 60 parts by mass of reinforcing silica, 8 to 15 parts by mass of superconducting carbon black, 3 to 5 parts by mass of graphene, 4 to 8 parts by mass of heat-resistant auxiliary agent, 5 to 5 parts by mass of radiation protection agent 10 parts by mass, 0.5-1.5 parts by mass of peroxide curing agent;

[0044] The raw materials used in this embodiment are all provided by the above-mentioned embodiments, and the specific descriptions and effects refer to the above-mentioned embodiments, which will not be repeated here.

[0045] (2) The weighed raw materials other than the peroxide curing agent are mixed and thinned, and then the weighed peroxide curing agent is added and kneaded to obtain a space-grade antistat...

Embodiment 1

[0050] This embodiment provides an antistatic sealing material, the preparation method comprising:

[0051] (1) Take raw materials according to the formula in Table 1, wherein: phenyl silicone rubber is the silicone rubber of the SD-1 model purchased from Shandong University, and fumed silica is the fumed silica of the A380 model purchased from Shenyang Chemical Industry ;

[0052] (2) Mix the weighed components except dicumyl peroxide in the internal mixer evenly, after passing through the mixer for 2 times, heat to 45°C, add the weighed dicumyl peroxide , smelting for 3 minutes, and cutting to obtain an antistatic sealing material.

[0053] After parking for 24 hours, perform a performance test on the obtained antistatic sealing material, and the test results are shown in Table 2.

[0054] Table 1 Example 1 formula table

[0055] raw material name Mass parts / parts Phenyl silicone rubber (6% phenyl mass content) 100 Fumed silica 60 Superconducti...

Embodiment 2

[0061] This embodiment provides an antistatic sealing material, the preparation method comprising:

[0062] (1) Take raw materials according to the formula in Table 3, wherein: phenyl silicone rubber is the silicone rubber of the SD-1 model purchased from Shandong University, and fumed silica is the fumed silica of the A380 model purchased from Shenyang Chemical Industry ;

[0063] (2) Mix the weighed components except dicumyl peroxide evenly in the internal mixer. After passing through the mixer for 2 times, heat to 55°C and add the weighed dicumyl peroxide , smelting for 5 minutes, and cutting to obtain an antistatic sealing material.

[0064]After parking for 24 hours, the performance test of the obtained antistatic sealing material was carried out, and the test results are shown in Table 2.

[0065] Table 3 Example 2 formula table

[0066] raw material name Mass parts / parts Phenyl silicone rubber (9%) 100 Fumed silica 45 Superconducting carbo...

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Abstract

The invention provides an antistatic sealing material and its preparation method and application. The antistatic sealing material includes 100 parts by mass of silicone rubber, 40-60 parts by mass of reinforcing white carbon black, 8-15 parts by mass of superconducting carbon black, 3-5 parts by mass of graphene, 4-8 parts by mass of heat-resistant additive, 5-10 parts by mass of anti-radiation agent, and 0.5-1.5 parts by mass of peroxide curing agent. The sealing material provided by the invention is non-toxic and pollution-free, has good electrical conductivity, high and low temperature resistance, small compression permanent deformation and excellent comprehensive performance, and is suitable for the sealing of space vehicles.

Description

technical field [0001] The invention relates to an antistatic sealing material and its preparation method and application, belonging to the technical field of antistatic materials. Background technique [0002] The sealing material of the space vehicle needs to have excellent high and low temperature resistance, compression set performance and radiation resistance; at the same time, in order to ensure that the sealing material will not cause adverse effects on the instruments, instruments and personnel in the aircraft in a vacuum environment, the sealing Materials must be non-toxic and non-polluting, with less vacuum spillage. [0003] At present, most of the structural seals of space vehicles at home and abroad use silicone rubber. Due to the relatively large volume resistivity of silicone rubber, electrostatic adsorption is easy to occur during use, resulting in an increase in leakage rate. Therefore, some special parts of space vehicles, such as hatches, require sealing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/02C08K3/36C08K3/04C08K3/22C08K3/30C08K5/14
CPCC08K3/04C08K3/22C08K3/30C08K3/36C08K5/14C08K13/02C08K2003/2272C08K2003/3045C08K2201/011C08L2201/04C08L2201/08C08K3/042C08L83/04
Inventor 李杰赵志祥李彦荣王江宋丹隋琦陈兵勇王炜马国富
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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