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Long-life tooth plate reinforced high-strength graphite gasket and preparation method thereof

A high-strength graphite, long-life technology, applied in chemical instruments and methods, compounds of Group 4/14 elements of the periodic table, organic chemistry, etc., can solve the problems of short service life, poor oxidation resistance and mechanical properties, etc. The effect of long service life, difficult repeated use, and easy installation and disassembly

Inactive Publication Date: 2019-10-15
慈溪埃弗龙密封件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a long-life tooth plate reinforced high-strength graphite gasket for the problems of poor oxidation resistance and mechanical properties and short service life of the existing graphite gasket The invention and its preparation method maintain the excellent characteristics of the graphite gasket such as corrosion resistance, high and low temperature resistance, and good resilience, while improving the oxidation resistance and mechanical properties of the graphite gasket, and prolonging its service life under severe working conditions such as high temperature and high pressure. service life

Method used

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  • Long-life tooth plate reinforced high-strength graphite gasket and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A long-life tooth plate reinforced high-strength graphite gasket, comprising a graphite plate and a metal tooth plate embedded in the middle of the graphite plate, the graphite plate is composed of the following raw materials in parts by weight: 100 parts of graphite powder, tannic acid 3 parts, resin 5 parts, methyl acrylate 1.5 parts, sodium metaaluminate 0.5 parts and cage silsesquioxane 6 parts.

[0032] Described cage type silsesquioxane is prepared by the following method:

[0033] S1: Add a mixed solution of methanol and ethyl acetate to the reaction kettle, and add N-(hydroxyethyl)-N-methylaminopropyltrimethoxysilane, hydrochloric acid and deionized water under the condition of magnetic stirring; The volume ratio of methanol, ethyl acetate, N-(hydroxyethyl)-N-methylaminopropyltrimethoxysilane, hydrochloric acid and deionized water is 60:140:25:37:70;

[0034] S2: Pass nitrogen or argon inert gas as a protective atmosphere, and heat, condense and reflux for 24 h...

Embodiment 2

[0045] In this example, the long-life tooth plate reinforced high-strength graphite gasket, its composition and preparation method are basically similar to those of Example 1, the main difference is that a long-life tooth plate reinforced high-strength graphite gasket includes a graphite plate and an inner A metal tooth plate embedded in the middle of the graphite plate, the graphite plate is composed of the following raw materials in parts by weight: 100 parts of graphite powder, 5 parts of tannic acid, 8 parts of resin, 3.5 parts of methyl acrylate, sodium metaaluminate 2 parts and cage silsesquioxane 8 parts.

[0046] The mesh number of the graphite powder is 40 mesh.

[0047] The resin is ethyl acrylate resin.

[0048] Correspondingly, a method for preparing the above-mentioned long-life tooth plate reinforced high-strength graphite gasket includes the following steps:

[0049] S1: The graphite powder is chemically treated with a mixture of sulfuric acid and nitric acid ...

Embodiment 3

[0054]In this example, the long-life tooth plate reinforced high-strength graphite gasket, its composition and preparation method are basically similar to those of Example 1, the main difference is that a long-life tooth plate reinforced high-strength graphite gasket includes a graphite plate and an inner A metal tooth plate embedded in the middle of the graphite plate, the graphite plate is composed of the following raw materials in parts by weight: 100 parts of graphite powder, 7 parts of tannic acid, 12 parts of resin, 5 parts of methyl acrylate, sodium metaaluminate 3 parts and cage silsesquioxane 10 parts.

[0055] The mesh number of the graphite powder is 60 mesh.

[0056] The resin is methyl methacrylate resin.

[0057] Correspondingly, a method for preparing the above-mentioned long-life tooth plate reinforced high-strength graphite gasket includes the following steps:

[0058] S1: The graphite powder is chemically treated with a mixture of sulfuric acid and nitric a...

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Abstract

The invention discloses a long-life tooth plate reinforced high-strength graphite gasket, which comprises a graphite plate and a metal tooth plate embedded in the middle of the graphite plate. The graphite plate is composed of the following raw materials by weight: 100 parts of graphite powder, 3-7 parts of tannic acid, 3-12 parts of resin, 1.5-5 parts of methyl acrylate, 0.5-3 parts of sodium metaaluminate and 6-10 parts of cage type silsesquioxane. The graphite gasket prepared by the invention maintains the corrosion resistance, high and low temperature resistance, good resilience and otherexcellent characteristics of graphite gasket, at the same time improves the oxidation resistance and mechanical properties of the graphite gasket, and prolongs the service life under high temperatureand high pressure and other severe working conditions. The invention also discloses a preparation method of the long-life tooth plate reinforced high-strength graphite gasket.

Description

technical field [0001] The invention relates to the field of graphite gasket processing, in particular to a long-life tooth plate reinforced high-strength graphite gasket and a preparation method thereof. Background technique [0002] Reinforced flexible graphite gaskets, also known as reinforced graphite gaskets or high-strength graphite gaskets, are punched or cut from reinforced graphite plates. Graphite gaskets have excellent corrosion resistance, high and low temperature resistance, and good compression resilience. Good strength and other characteristics, so it is widely used in the connection of pipes, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators and other equipment. [0003] The tooth plate reinforced graphite gasket is generally used together with the flange. Its surface is soft, avoiding direct metal-to-metal contact, and can be reliably and tightly combined to protect the metal flange from b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/536C04B35/622C04B35/63C04B35/632C04B35/634C07F7/08
CPCC04B35/536C04B35/622C04B35/6303C04B35/632C04B35/63424C04B2235/96C07F7/0874
Inventor 叶奇为
Owner 慈溪埃弗龙密封件有限公司