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High temperature-resistant flexible elastic sealing gasket and preparation method and application of high temperature-resistant flexible elastic sealing gasket

A technology of gaskets and refractory fibers, applied in textiles and papermaking, non-polymer adhesive additives, epoxy resin adhesives, etc., can solve the problems of easy powdering of sealing materials, poor sealing effect and low mechanical strength, etc. Achieve the effect of improving sealing performance, excellent corrosion resistance and overall performance enhancement

Active Publication Date: 2018-12-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the problems existing in the prior art that the sealing material is easy to pulverize at high temperature, the sealing effect is not good, the mechanical strength is low, and the service life is short, the purpose of the present invention is to provide a high temperature resistant flexible elastic sealing gasket and its preparation method and use

Method used

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  • High temperature-resistant flexible elastic sealing gasket and preparation method and application of high temperature-resistant flexible elastic sealing gasket
  • High temperature-resistant flexible elastic sealing gasket and preparation method and application of high temperature-resistant flexible elastic sealing gasket
  • High temperature-resistant flexible elastic sealing gasket and preparation method and application of high temperature-resistant flexible elastic sealing gasket

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Prepare the gasket as follows:

[0070] In this embodiment, the components and proportions of the binder slurry for the gasket are selected as follows: 52 parts of water-based polyurethane, 30 parts of epoxy resin emulsion, 13 parts of filler, 5 parts of aluminum sol, and 0.8 parts of dispersing agent.

[0071] (1) Add water-based polyurethane, epoxy resin emulsion, aluminum sol and dispersant to a high-speed mixer and stir for 20 minutes. After mixing well, add 13 parts of filler. The composition of the filler is that vermiculite particles and short mullite fibers are added in a mass ratio of 1:1. A stable binder slurry was formed after ball milling for 1 h. The dispersant is sodium dodecylbenzenesulfonate.

[0072] (2) Use plain high-silica fiber cloth with a purity higher than 96% as the substrate, and after pretreatment at 600°C for 30 minutes, use an automatic rubber rolling machine to evenly coat the binder slurry on the upper and lower sides of the fiber cloth...

Embodiment 2

[0079] Prepare the high temperature resistant flexible elastic gasket according to the following steps:

[0080] The binder slurry components and proportions of the sealing material in this embodiment are selected as follows: 68 parts of water-based polyurethane, 16 parts of epoxy resin emulsion, 15 parts of filler, 1 part of aluminum sol, and 1 part of dispersant .

[0081] (1) Add water-based polyurethane, epoxy resin emulsion, aluminum sol and dispersant to a high-speed mixer and stir for 20 minutes. After mixing evenly, add 15 parts of filler. The filler is composed of vermiculite particles, mullite short fibers and zirconia short fibers in a mass ratio of 2:1:1. A stable binder slurry is formed after stirring. The stirring speed was controlled at 800 rpm, and stirred for 50 min. The dispersant is sodium alkyl diphenyl ether monosulfonate.

[0082] (2) Use a satin-surface high-silica fiber cloth with a purity higher than 96% as the substrate, and after ultrasonic vibra...

Embodiment 3

[0087] Prepare the high temperature resistant flexible elastic gasket according to the following steps:

[0088] In this embodiment, the binder slurry components and proportions of the high-temperature gasket are selected as follows: 65 parts of water-based polyurethane, 22 parts of epoxy resin emulsion, 10 parts of filler, 3 parts of aluminum sol, and 0.5 parts of dispersing agent.

[0089] (1) Add water-based polyurethane, epoxy resin emulsion, aluminum sol and dispersant to a high-speed mixer and stir for 50 minutes. After stirring evenly, add 10 parts of filler. The composition of the filler is that vermiculite particles and short mullite fibers are added in a mass ratio of 2:1. After mixing, a stable binder slurry is formed. The dispersant is sodium dodecylbenzenesulfonate.

[0090] (2) Use stainless steel wire-reinforced plain aluminum silicate fiber cloth as the substrate, impregnate the fiber cloth in the above slurry, stack three layers, and dry at 60°C for 5 hours...

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Abstract

The invention provides a high temperature-resistant flexible elastic sealing gasket and a preparation method and application of the high temperature-resistant flexible elastic sealing gasket. The sealing gasket comprises refractory fiber cloth and binder slurry, wherein the refractory fiber cloth is superposed mutually, the binder slurry which is arranged among adjacent refractory fiber cloth andon the outer side surface of the outermost layer of refractory fiber cloth comprises the following components, in parts by weight, 50-70 parts of aqueous polyurethane, 10-35 parts of epoxy resin emulsion, 10-15 parts of filler, 1-5 parts of aluminum sol and 0.5-1 part of a dispersing agent. The preparation method comprises the following steps: (1) preparing the binder slurry; and (2) compounding the binder slurry prepared in the step (1) on to-be-bonded surfaces of the refractory fiber cloth, then superposing the obtained refractory fiber cloth compounded with the binder slurry, and finally performing processing molding so as to obtain the sealing gasket. The high temperature-resistant flexible elastic sealing gasket can be used for a long period of time in a high temperature environment.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic composite materials, and in particular relates to a high-temperature-resistant flexible elastic sealing gasket and its preparation method and application. Background technique [0002] In recent years, with the continuous development of industries such as petrochemical, metallurgy, and environmental protection, higher and higher requirements have been put forward for the high-temperature and high-pressure performance of high-temperature dusty gas separation devices. One of the important factors in the continuous operation of time. In the process of industrial production, if the ambient temperature does not match the sealing material or under thermal overload conditions, the aging and embrittlement of the sealing material will be accelerated. The sealing technology of pipe fittings under high temperature conditions is particularly important, which also affects the sealing material. More strin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/02B32B5/26B32B7/12B32B33/00C09J175/04C09J163/00C09J11/04C09J11/06D06M17/10
CPCB32B5/02B32B5/26B32B7/12B32B33/00B32B2307/306B32B2307/714C08K2003/2227C09J11/04C09J11/06C09J175/04D06M17/10C08L63/00C08K13/04C08K3/22C08K5/42
Inventor 刘开琪孙广超熊瑞陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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