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Sealing material with high temperature resistance and high rebound resilience and preparation method of sealing material

A sealing material and high-temperature-resistant technology, applied in the field of materials, can solve the problems of rubber sealing materials that cannot be used for a long time, compression rebound and sealing performance loss, component decomposition, etc., and achieve fast strain rebound response time, excellent heat insulation performance, low cost effect

Active Publication Date: 2017-09-19
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing rubber sealing materials cannot be used for a long time in the environment above 400°C for a long time, and when used in the environment above 400°C for a long time, the volume expansion will occur, and the components will decompose, which will lead to its thermal conductivity. Too high, compression rebound and loss of sealing performance

Method used

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  • Sealing material with high temperature resistance and high rebound resilience and preparation method of sealing material
  • Sealing material with high temperature resistance and high rebound resilience and preparation method of sealing material
  • Sealing material with high temperature resistance and high rebound resilience and preparation method of sealing material

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preparation example Construction

[0047] Second, the present invention also provides a preparation method of the sealing material, comprising the steps of:

[0048] (1) Mix A component and B component and stir evenly to prepare an impregnation solution.

[0049] In some embodiments, in step (1), the stirring speed is controlled at 600-1000 rpm, and the stirring time is controlled at 30-60 minutes.

[0050] (2) The fiber is made into a fiber matrix.

[0051] In the present invention, the fiber matrix can be in various forms, such as fiber cotton, fiber felt, fiber blanket, fiber cloth, etc., and the preparation method can adopt existing processing methods, such as needle punching molding process.

[0052] The shape and size (eg thickness) of the fiber matrix can be determined as required.

[0053] (3) Composite the fiber matrix and the impregnating liquid to obtain a composite preform.

[0054] The composite method can choose normal pressure impregnation or vacuum impregnation.

[0055] (4) The composite pref...

Embodiment 1

[0059] Weigh each preparation component according to Table 1.

[0060] (1) Mix and stir components A and B evenly, the stirring speed is controlled at 800 rpm, and after stirring for 60 minutes, an impregnation solution is obtained.

[0061] (2) The fiber is made into a fiber mat.

[0062] (3) The fiber mat is placed in a mold, and vacuum impregnated with the impregnating solution (vacuum degree is -0.06MPa) to be composited to obtain a composite preform.

[0063] (4) The obtained composite preform was vulcanized at room temperature for 24 hours, and then thermally vulcanized at 60° C. for 48 hours to obtain a rubber sealing material.

[0064] The preparation steps of Example 2 to Example 6 are basically the same as Example 1, and the differences are shown in Table 1 and Table 2 (1 to 6 in Table 1 and Table 2 correspond to Example 1 to Example 6, respectively).

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Abstract

The invention relates to a sealing material with high temperature resistance and high rebound resilience and a preparation method of the sealing material. The sealing material is prepared from following components in parts by weight: a component A, a component B and 10-30 parts of fibers, wherein the component A contains 5-20 parts of silicone rubber, 2-8 parts of silicon resin, 0.2-1.5 parts of a silicone rubber curing agent, 2-6 parts of glycerol trioleate and 50-120 parts of cyclohexane, and the component B contains 2-7 parts of carbon black, 1-5 parts of talcum powder, 1-6 parts of fumed silica, 1-10 parts of hollow glass microspheres, 1-5 parts of molybdenum disilicide and 1-5 parts of titanium dioxide. The rubber sealing material is resistant to the temperature of 450 DEG C or higher, and temperature resistance level of the sealing material is better than that of an existing thermal sealing material; furthermore, the sealing material can meet the high-rebound deformation thermal sealing demands in multiple coupling work states such as temperature, pressure, vibration, displacement and the like, and strain rebound response time is short; besides, the sealing material has good thermal insulation performance.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a sealing material with high temperature resistance and high resilience and a preparation method thereof. Background technique [0002] Sealing materials mainly refer to the materials used to solve the "air-tight" and "liquid-tight" problems in pipelines or gap spaces. Early sealing materials mainly include cotton, asbestos and mineral fibers, etc., and rubber sealing materials are the most widely used at present. [0003] Rubber sealing materials have the advantages of long service life and good sealing effect, but the temperature resistance of existing rubber sealing materials is generally about 350°C, and 400°C for a short time, and cannot be used for a long time in an environment above 400°C. When used in an environment above 400°C for a long time, the existing rubber sealing material will expand in volume and decompose its components, resulting in high thermal conductivit...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K13/04C08K7/28C08K3/22C08K3/36C08K3/34C08K3/04B29C35/02B29C70/18
CPCC08L83/04B29C35/02B29C70/18C08L2205/025C08L2201/08C08K2003/2241C08K13/04C08K7/28C08K3/22C08K3/36C08K3/34C08K3/04
Inventor 周玉贵李文静张媛媛刘斌赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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