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Wear-resistant sealing gasket and preparation method thereof

A gasket and modification technology, applied in the field of wear-resistant gaskets and their preparation, can solve the problems that the gasket affects the running time of equipment and the sealing performance of the gasket equipment, etc., so as to shorten the preparation time, improve the running time and wear resistance. good effect

Inactive Publication Date: 2021-06-22
四川金恒液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the daily use of pumps and valves, gaskets are often used. The performance of the gaskets will greatly affect the running time of the entire equipment. The existing gaskets often need to be used for a long time. During use, they are often due to Damage to the gasket leads to a decrease in the sealing performance of the entire device

Method used

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  • Wear-resistant sealing gasket and preparation method thereof
  • Wear-resistant sealing gasket and preparation method thereof
  • Wear-resistant sealing gasket and preparation method thereof

Examples

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preparation example Construction

[0032] The present invention also includes the preparation method of the above-mentioned wear-resistant gasket, comprising the steps of:

[0033] S1 Put vinyl polydimethylsiloxane, nano silicon dioxide, mercaptan-modified neoprene rubber, acrylonitrile butadiene rubber, and hexamethyldisiloxane into the defoaming mixer in turn, and stir for 5- 20 minutes;

[0034] S2 Pour the stirred raw materials into the mold of the vulcanizer, heat and press to obtain a semi-finished product;

[0035] S3 processes semi-finished products into wear-resistant gaskets.

[0036] The temperature of heating and pressing in the step S2 is 160-180 degrees, and the pressing is 0.5-0.8Mpa.

[0037] The duration of step S2 is 10-30 minutes.

[0038] Step S1 puts the raw materials into the defoaming mixer in multiple batches.

Embodiment 1

[0040] A wear-resistant sealing gasket, comprising in parts by mass: 100 parts of vinyl polydimethylsiloxane, 12 parts of nano-silica, 40 parts of mercaptan-modified neoprene rubber, and 6 parts of acrylonitrile butadiene rubber , 56 parts of hexamethyldisiloxane; the nano-silica selects the nano-silica whose specific surface area is 460m2 / g. Mercaptan-modified chloroprene rubber is obtained by polymerization of chloroprene in an octyl mercaptan environment.

[0041] The content of acrylonitrile in the acrylonitrile butadiene rubber is 36%.

[0042] A preparation method for a wear-resistant sealing gasket, comprising the steps of:

[0043] S1 Put vinyl polydimethylsiloxane, nano-silica, mercaptan-modified neoprene rubber, acrylonitrile butadiene rubber, and hexamethyldisiloxane into a defoaming mixer in turn, and stir for 5 minutes ;

[0044] S2 Pour the stirred raw materials into the mold of the vulcanizer, heat and press to obtain a semi-finished product;

[0045] S3 pro...

Embodiment 2

[0049] A wear-resistant sealing pad, comprising in parts by mass: 120 parts of vinyl polydimethylsiloxane, 10 parts of nano silicon dioxide, 40 parts of mercaptan-modified neoprene rubber, and 10 parts of acrylonitrile butadiene rubber , 60 parts of hexamethyldisiloxane;

[0050] The content of acrylonitrile in the acrylonitrile butadiene rubber is 40%.

[0051] The preparation method of above-mentioned wear-resisting gasket, comprises the steps:

[0052] S1 Put vinyl polydimethylsiloxane, nano silicon dioxide, mercaptan-modified chloroprene rubber, acrylonitrile butadiene rubber, and hexamethyldisiloxane into the defoaming mixer three times, and stir for 15 minute;

[0053] S2 Pour the stirred raw materials into the mold of the vulcanizer, heat and press to obtain a semi-finished product;

[0054] S3 processes semi-finished products into wear-resistant gaskets.

[0055] The temperature of heating and pressing in the step S2 is 180 degrees, and the pressing is 0.7Mpa. The...

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Abstract

The invention discloses a wear-resistant sealing gasket and a preparation method thereof. The wear-resistant sealing gasket is prepared from the following components in parts by mass: 100 to 120 parts of vinyl polydimethylsiloxane, 10 to 15 parts of nano silicon dioxide, 40 to 60 parts of thiol modified chloroprene rubber, 1 to 15 parts of acrylonitrile butadiene rubber and 50 to 70 parts of hexamethyldisilylimide. The ratio of the nano silicon dioxide to the thiol modified chloroprene rubber to the hexamethyldisilylimine is (1-2): (4-6): (5-7). The wear-resistant sealing gasket is good in wear resistance, long in service life and capable of effectively prolonging the running time of whole equipment.

Description

technical field [0001] The invention relates to the field of sealing gaskets, in particular to a wear-resistant sealing gasket and a preparation method thereof. Background technique [0002] Sealing gasket is a kind of sealing spare parts used in machinery, equipment and pipelines as long as there is fluid. It uses internal and external materials to play a sealing role. Sealing gaskets are made of metal or non-metallic plate materials through cutting, stamping or cutting processes, and are used for the sealing connection between pipes and the sealing connection between parts of machinery and equipment. According to the material, it can be divided into metal sealing gasket and non-metallic sealing gasket. Metal gaskets include copper gaskets, stainless steel gaskets, iron gaskets, aluminum gaskets, etc. Non-metallic gaskets include asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, etc. [0003] In the daily use of pumps and valves, gaskets are often us...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L11/00C08L9/02C08K3/36C08K5/5445
CPCC08K2201/011C08L83/04C08L2205/03C08L11/00C08L9/02C08K3/36C08K5/544
Inventor 王进周诗杰彭丽霞陆星
Owner 四川金恒液压有限公司