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High-temperature-resistant sealing film for water vapor and preparation method of sealing film

A sealing film and high temperature resistant technology, applied in the field of high temperature resistant water vapor sealing film and its preparation, can solve the problems of reducing the thermal insulation effect, affecting the service life of thermal insulation materials, etc. The effect of thermal insulation

Active Publication Date: 2019-12-20
铁科创恒新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to water seepage often occurs in the surrounding rock and primary support of the tunnel, and a large amount of water vapor is formed in the high ground temperature environment, the water vapor easily passes through the heat insulation material, which reduces the heat insulation effect on the one hand and affects the service life of the heat insulation material on the other hand

Method used

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  • High-temperature-resistant sealing film for water vapor and preparation method of sealing film

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Effect test

Embodiment 1

[0020] A high temperature resistant water vapor sealing film, the preparation raw materials of the sealing film include 20 parts of butyl acetate, 12 parts of polymethylpentene, 8 parts of polyimide, 6 parts of polyacrylate, 5 parts of modified Carbon nanotubes, 5 parts of inorganic high temperature resistant additives, 2 parts of glycidyl methacrylate and 1 part of dibenzoyl peroxide. Wherein, the modified carbon nanotube refers to the modified carbon nanotube obtained by acidifying the carbon nanotube with 70wt% concentrated nitric acid, the treatment temperature is 60°C, and the treatment time is 2h; the inorganic high temperature resistant auxiliary The agent is composed of silicon dioxide and magnesium stearate mixed, and the weight ratio of silicon dioxide and magnesium stearate is 2:1.

[0021] The preparation steps of the above-mentioned high temperature resistant water vapor sealing membrane include:

[0022] Step 1, mixing and stirring butyl acetate, polymethylpente...

Embodiment 2

[0027] A high temperature resistant water vapor sealing film, the preparation raw materials of the sealing film include 22 parts of butyl acetate, 13 parts of polymethylpentene, 10 parts of polyimide, 8 parts of polyacrylate, 7 parts of modified Carbon nanotubes, 6 parts of inorganic high temperature resistant additives, 6 parts of glycidyl methacrylate and 5 parts of dibenzoyl peroxide. Wherein, the modified carbon nanotube refers to the modified carbon nanotube obtained by acidifying the carbon nanotube with 70wt% concentrated nitric acid, the treatment temperature is 62°C, and the treatment time is 1h; The agent is composed of silicon dioxide and magnesium stearate mixed, and the weight ratio of silicon dioxide and magnesium stearate is 4:1.

[0028] The preparation steps of the above-mentioned high temperature resistant water vapor sealing membrane include:

[0029] Step 1, mixing and stirring butyl acetate, polymethylpentene, polyimide, polyacrylate, modified carbon nano...

Embodiment 3

[0034] A high temperature resistant water vapor sealing film, the preparation raw materials of the sealing film include 25 parts of butyl acetate, 15 parts of polymethylpentene, 12 parts of polyimide, 10 parts of polyacrylate, 10 parts of modified Carbon nanotubes, 8 parts of inorganic high temperature resistant additives, 12 parts of glycidyl methacrylate and 10 parts of dibenzoyl peroxide. Wherein, the modified carbon nanotube refers to the modified carbon nanotube obtained by acidifying the carbon nanotube with 70wt% concentrated nitric acid, the treatment temperature is 65°C, and the treatment time is 0.5h; the inorganic high temperature resistant The auxiliary agent is composed of silicon dioxide and magnesium stearate mixed, and the weight ratio of silicon dioxide and magnesium stearate is 5:1.

[0035] The preparation steps of the above-mentioned high temperature resistant water vapor sealing membrane include:

[0036] Step 1, mixing and stirring butyl acetate, polymet...

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Abstract

The invention discloses a high-temperature-resistant sealing film for water vapor and a preparation method of the sealing film. The sealing film includes the following preparation raw materials: butylacetate, polymethylpentene, polyimide, polyacrylate, modified carbon nanotubes, an inorganic high-temperature-resistant auxiliary agent, glycidyl methacrylate and dibenzoyl peroxide. In the method, the sealing film with strong temperature resistance and an extremely-low water vapor transmission rate is prepared through processes of mixing, an alkaline grafting reaction, extrusion, pressing, cooling, heat treatment recovery shaping, trimming and winding, the sealing film wraps the surface of a heat insulation material, and can effectively block the water vapor from passing through the heat insulation material, thereby ensuring the heat insulation effect and prolonging the service life of the heat insulation material; and the sealing film has higher heat and humidity resistance and strongerstability in use.

Description

technical field [0001] The invention relates to the technical field of water vapor sealing, in particular to a high temperature resistant water vapor sealing film and a preparation method thereof. Background technique [0002] In some areas of my country, during the construction and excavation of tunnels, due to high geothermal heat, the temperature inside the tunnel is high, and it is difficult for construction workers to carry out construction operations in the tunnel, and the waterproof and drainage materials laid in the later stage may be accelerated due to high temperature aging. Therefore, it is necessary to use thermal insulation materials to cover the surface of the mountain in the tunnel to achieve the effect of isolating the heat of the mountain and reducing the temperature in the tunnel. [0003] However, due to water seepage often occurs in the surrounding rock and primary support of the tunnel, and a large amount of water vapor is formed in the high ground tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/08C08F283/04C08F265/06C08F220/32C08F2/44C08K9/02C08K3/04C08K3/36C08K5/098C08J5/18C08L51/06C08L51/08C08L51/00
CPCC08F255/08C08F283/04C08F265/06C08F2/44C08K9/02C08K3/041C08K3/36C08K5/098C08J5/18C08J2351/06C08J2451/08C08J2451/00
Inventor 朱长伟王姣王建
Owner 铁科创恒新材料科技有限公司
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