A kind of multi-layer composite sealing gasket and preparation method thereof

A sealing gasket and multi-layer composite technology, which is applied in the direction of engine sealing, mechanical equipment, non-polymer organic compound adhesives, etc., can solve the problems of wear resistance, aging resistance, poor rebound sealing performance, and heat resistance. Large difference in performance and aging resistance, poor mechanical strength and pressure resistance, etc., to achieve the effect of low equipment dependence, excellent wear resistance, and high mechanical strength

Active Publication Date: 2020-05-19
CIXI CHUNCHAO SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a multi-layer composite sealing gasket, which overcomes the more or less poor mechanical strength and pressure resistance, wear resistance and aging resistance of traditional sealing gaskets. It also overcomes the technical problems that the traditional multi-layer composite sealing gaskets have poor adhesion between layers, poor compatibility, heat resistance and resistance. The difference in aging is large and not enough, it is easy to move, deviate from the sealing groove, resulting in leakage, which seriously affects the performance of the equipment. It has higher mechanical strength than traditional sealing gaskets, more excellent wear resistance, high temperature resistance, Aging resistance, solvent resistance and rebound sealing; meanwhile, the invention also discloses the preparation method of the multi-layer composite sealing gasket

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A multi-layer composite sealing gasket comprises a surface layer, an adhesive layer, a core layer, an adhesive layer, and a surface layer sequentially from top to bottom.

[0029] The core layer is preferably a stainless steel sheet; the surface layer includes the following components by weight: 30 parts of polyisoprene, 20 parts of nitrile rubber, 1 part of 2-(trimethoxysilyl) ethanethiol, 1 part of diethylamine, 30 parts of chlorosulfonated polyethylene, 20 parts of fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer, 15 parts of cement, and 10 parts of coal powder.

[0030] The preparation method of the fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer comprises the following steps: 200 g of cyanoethyl acrylate, 100 g of 1,2,2-trifluorovinyl triphenylsilane, 2,4- Dissolve 100g of diamino-6-vinyl-S-triazine and 2g of azobisisobutyronitrile in 800g of dimethyl sulfoxide, mix well, and bubble with nitrogen gas for 25min, then ...

Embodiment 2

[0036] A multi-layer composite sealing gasket comprises a surface layer, an adhesive layer, a core layer, an adhesive layer, and a surface layer sequentially from top to bottom.

[0037] The core layer is preferably a stainless steel sheet; the surface layer includes the following components by weight: 33 parts of polyisoprene, 23 parts of nitrile rubber, 2 parts of 2-(trimethoxysilyl) ethanethiol, 2 parts of diethylamine, 33 parts of chlorosulfonated polyethylene, 23 parts of fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer, 17 parts of cement, and 11 parts of coal powder.

[0038] The preparation method of the fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer comprises the following steps: 200 g of cyanoethyl acrylate, 100 g of 1,2,2-trifluorovinyl triphenylsilane, 2,4- 100g of diamino-6-vinyl-S-triazine and 2.5g of azobisisoheptanonitrile were dissolved in 850g of N,N-dimethylformamide. After reacting at ℃ for 10.5 hours, the ...

Embodiment 3

[0044] A multi-layer composite sealing gasket comprises a surface layer, an adhesive layer, a core layer, an adhesive layer, and a surface layer sequentially from top to bottom.

[0045] The core layer is preferably a stainless steel sheet; the surface layer includes the following components in parts by weight: 35 parts of polyisoprene, 26 parts of nitrile rubber, 3 parts of 2-(trimethoxysilyl) ethanethiol, 3 parts of diethylamine, 35 parts of chlorosulfonated polyethylene, 26 parts of fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer, 17 parts of cement, and 13 parts of coal powder.

[0046] The preparation method of the fluorine-containing silicon triazine-based cyanoethyl acrylate copolymer comprises the following steps: 200 g of cyanoethyl acrylate, 100 g of 1,2,2-trifluorovinyl triphenylsilane, 2,4- Dissolve 100g of diamino-6-vinyl-S-triazine and 3g of dimethyl azobisisobutyrate in 1000g of N-methylpyrrolidone. After reacting for 11.5 hours, the pr...

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PUM

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Abstract

The invention provides a multi-layer composite sealing gasket comprising a surface layer, a bonding layer, a core layer, a bonding layer and a surface layer which are sequentially arranged from top tobottom. The core layer is preferably selected from a stainless steel sheet; the surface layer includes the following components including, by weight, 30 to 40 parts of polyisoprene, 20 to 30 parts ofnitrile rubber, 1 to 5 parts of 2-( trimethoxysilane) ethyl mercaptan, 1 to 3 parts of diethylamine, 30 to 40 parts of chlorosulfonated polyethylene, 20 to 30 parts of fluorosilicone-contained triazine-based cyanoethyl acrylate copolymer, 15 to 20 parts of cement and 10 to 15 parts of pulverized coal. The invention also discloses a preparation method of the multi-layer composite sealing gasket. The multi-layer composite sealing gasket has higher mechanical strength, better wear resistance, better high temperature resistance, better aging resistance, better solvent resistance, better rebound sealing property and longer service life compared with a traditional sealing gasket.

Description

technical field [0001] The invention relates to the technical field of seals, in particular to a multilayer composite sealing gasket and a preparation method thereof. Background technique [0002] Sealing gasket is a common sealing material used in machinery, equipment, pipelines, etc. It is usually made of metal or non-metal plate material, which is made by cutting, stamping or cutting, and is used in pipelines. The airtight connection between. With the development of industrial technology and the expansion of the scope of use, people have put forward higher requirements for sealing gaskets, not only requiring them to have good resilience and sealing performance, but also requiring them to have excellent mechanical strength, high temperature resistance, and corrosion resistance. resistance, oil resistance and abrasion resistance. [0003] Existing gaskets mainly include metal gaskets, asbestos gaskets and asbestos-free non-metal gaskets. Asbestos sealing gasket has super...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/10C08L9/00C08L23/34C08L9/02C08K13/02C09J4/02C09J4/06
CPCC08L9/00C08L23/34C08L2205/035C09J4/06F16J15/102C08L9/02C08K13/02
Inventor 胡建定杨鑫华
Owner CIXI CHUNCHAO SEAL
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