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A kind of modified rubber seal and preparation method thereof

A technology of modified rubber and seals, which is applied in the field of modified rubber, which can solve the problems of easily deformed rubber gasket sealing performance, reduce the sealing performance of rubber gasket, and easy aging of rubber gasket, and achieve wear-resistant processing and water absorption. The effect of low rate and easy processing

Active Publication Date: 2021-04-30
厦门联博橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the current rubber gaskets can meet the needs of most production and life, in high temperature and high pressure environments, rubber gaskets are prone to aging due to thermal oxidation and high pressure, and are easily deformed, making the sealing of rubber gaskets difficult. The performance drops sharply, which greatly reduces the sealing performance of the rubber gasket

Method used

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  • A kind of modified rubber seal and preparation method thereof
  • A kind of modified rubber seal and preparation method thereof
  • A kind of modified rubber seal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: A modified rubber seal, the components and their corresponding parts by mass are shown in Table 1, and are prepared through the following steps:

[0045] Step 1: Put styrene-butadiene rubber and EPDM rubber into the internal mixer for internal mixing, then add zinc oxide, stearic acid, accelerator, silicon dioxide, carbon fiber tube, and modified aramid fiber, and then internally mix , to get the rubber compound;

[0046] Step 2, putting the mixed rubber into an open mill for open milling, adding sulfur after standing for 5 hours, and performing open milling again to obtain rubber compound;

[0047] Step 3: Put the rubber material into the mold of the vulcanizing machine for vulcanization. The vulcanization temperature is 160° C. and the vulcanization time is 30 minutes. After the vulcanization is completed, cool to room temperature and demould to obtain the modified rubber seal.

[0048] Among them, the preparation method of the modified aramid fiber is as ...

Embodiment 2-9

[0049] Example 2-9: A modified rubber seal, the difference from Example 1 is that the components and their corresponding parts by mass are shown in Table 1.

[0050] Each component and its mass parts in table 1 embodiment 1-9

[0051]

Embodiment 10

[0052]Embodiment 10: A modified rubber seal. The difference from Example 1 is that the preparation method of the modified aramid fiber is as follows: 100mL of acetone solution is put into the container, and then the aramid fiber, benzophenone Put glycidyl methacrylate into an acetone solution, carry out grafting reaction under the radiation of ultraviolet light after purging nitrogen to remove oxygen, and the radiation time is 13min. After the reaction is completed, filter, wash and dry to obtain modified aramid fiber; The mass ratio of glycidyl methacrylate to acetone solution is 4%; the mass ratio of benzophenone to acetone solution is 1.5%.

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Abstract

The invention discloses a modified rubber sealing piece and a preparation method thereof, and relates to the field of modified rubber. The technical points are: the modified rubber seal is made of the following raw materials in parts by mass: 70-80 parts of styrene-butadiene rubber; 50-60 parts of EPDM rubber; 0.1-0.3 parts of sulfur; 2-2.5 parts of zinc oxide 0.5-1 part of stearic acid; 1-1.5 part of accelerator DM; 4-6 parts of silicon dioxide: 3-5 parts of carbon fiber tube and 1-3 part of modified aramid fiber; the preparation of the modified aramid fiber The method is as follows: put the acetone solution into the container, then put the aramid fiber, benzophenone and glycidyl methacrylate into the acetone solution, pass nitrogen gas to deoxygenate, carry out the grafting reaction under the radiation of ultraviolet light, and the reaction is completed Afterwards, filter, wash, and dry to obtain modified aramid fibers. The modified rubber seal prepared by the invention has the advantages of high temperature resistance, excellent mechanical performance and good aging resistance.

Description

technical field [0001] The invention relates to the field of modified rubber, more specifically, it relates to a modified rubber seal and a preparation method thereof. Background technique [0002] Rubber seals are a common basic component in sealing devices, and play a very important role in the contradiction between leakage and sealing. Solve leakage and sealing problems in the process of man's conquest of nature. It has been an important way to promote technological progress, prevent and reduce environmental pollution. Rubber seals are a type of rubber products widely used in sealing technology. Because rubber is a valuable elastic polymer material, it has a wide temperature range, and a small stress in different media will produce a large deformation. This deformation can provide contact pressure, compensate for leakage gaps, and achieve the purpose of sealing. . [0003] Although the current rubber gaskets can meet the needs of most production and life, in high temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L23/16C08L51/08C08K13/02C08K3/04C08K3/22C08K3/36C08K5/09
Inventor 陈荣泉
Owner 厦门联博橡胶制品有限公司
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