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Environment-friendly non-toxic sealing gasket and preparation method thereof

A kind of sealing gasket and environmental protection technology, applied in the field of environmental protection non-toxic sealing gasket and its preparation, can solve the problems of complex, non-asbestos sealing gasket performance can not meet people's requirements, etc., achieve good creep performance, tightness Good, easy-to-prepare effect

Pending Publication Date: 2022-07-29
上海西尔福斯特密封件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the factors to be considered in the design of non-asbestos gaskets are much more complicated than traditional asbestos gaskets, the performance of prepared non-asbestos gaskets often falls far short of people's requirements, and with the development of society , the simple non-asbestos sealing gasket cannot meet people's requirements, and the development of a functional, high performance, good sealing performance, environmentally friendly and non-toxic sealing gasket has become a problem that needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] The preparation method of modified graphene oxide of the present invention comprises the following steps:

[0048] Disperse 100 mg of graphene oxide by ultrasonic for 4 hours, add modifying reagent, stir and mix uniformly, ultrasonically disperse for 30 minutes, add 80ul, 85% hydrazine hydrate and 350ul, 28% ammonia solution, stir and mix uniformly, heat up to 100 ° C, react for 1 h to obtain modification Graphene oxide.

[0049] Due to its unique structure, graphene can form an effective conductive path in the gasket, and can also improve the thermal conductivity and mechanical properties of the gasket, thereby expanding the application range of the gasket. The unexpected research of the present invention finds that the performance of the sealing gasket can be further improved by modifying the graphene oxide. It is speculated that the positive charge of the modified graphene oxide can effectively combine with the elastic adhesive by electrostatic interaction, and the ...

Embodiment 1

[0071] An environmentally friendly non-toxic sealing gasket, in parts by weight, the raw materials include 32 parts of elastic adhesives, 11 parts of non-asbestos fibers, 40 parts of fillers, 7 parts of functional auxiliary agents, and 3 parts of auxiliary agents.

[0072] The elastic adhesive includes nitrile rubber and carboxylated nitrile rubber. The weight ratio of the nitrile rubber and the carboxylated nitrile rubber is 6:4.

[0073] The solid content of the nitrile rubber is ≥43%, and the viscosity at 25°C is ≤500mpa·s. The solid content of the carboxylated nitrile rubber is 44%, and the viscosity at 25° C. is ≤50mpa·s. The nitrile rubber and carboxylated nitrile rubber were purchased from Jiangsu Yatai Chemical Co., Ltd.

[0074] The non-asbestos fibers include aramid pulp fibers, cellulose fibers and mineral fibers. The weight ratio of aramid pulp fiber, cellulose fiber and mineral fiber is 7:10:18.

[0075] The average length of the aramid pulp fiber is 700um, th...

Embodiment 2

[0090] An environmentally friendly non-toxic sealing gasket, the specific implementation is the same as that of Example 1, the difference is that the weight ratio of the sericite, kaolin, and modified photocatalyst particles is 3:3:8.

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Abstract

The invention relates to the technical field of sealing, in particular to an environment-friendly non-toxic sealing gasket and a preparation method thereof. The raw materials comprise, by weight, 30-40 parts of an elastic adhesive, 10-12 parts of non-asbestos fibers, 30-50 parts of a filler, and 1-10 parts of a functional auxiliary agent. According to the environment-friendly non-toxic sealing gasket and the preparation method thereof, the compression resilience is good, the creep performance is good, the sealing performance is good, the corrosion resistance is good, and the requirements of customers can be fully met.

Description

technical field [0001] The invention relates to the technical field of sealing, in particular to an environment-friendly non-toxic sealing gasket and a preparation method thereof. Background technique [0002] For a long time, asbestos-based gaskets have been widely used, but with the development of society, people pay more and more attention to the development of human health and environmental pollution. Countries have gradually begun to ban asbestos in recent years, and it has become an inevitable trend of current development to develop a non-asbestos gasket to replace asbestos gaskets. [0003] Non-asbestos gaskets are non-asbestos sealing materials, sealing products of various shapes made of aramid fibers, fibers, rubber and other materials. However, since the elements to be considered in the design of non-asbestos gaskets are much more complex than traditional asbestos gaskets, the performance of prepared non-asbestos gaskets often falls far short of people's requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L13/00C08L77/10C08L1/02C08K7/04
CPCC08L9/02C08L2205/035C08L2205/16C08L13/00C08L77/10C08L1/02C08K7/04
Inventor 谭少华金秋吉
Owner 上海西尔福斯特密封件有限公司