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High-temperature-resistant shielding paint and preparation method thereof

A technology of shielding coatings and high-temperature-resistant fillers, applied in coatings and other directions, can solve the problems of poor coating flexibility, easy breakage of bonds, and loss of shielding effect of materials, achieving light weight and good radiation protection effects

Active Publication Date: 2017-03-08
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main components of existing high-temperature resistant coatings are resins, specifically including phenolic resins, epoxy-modified resins, polyimides or / and silicone resins, and the bonds of small molecules inside the above-mentioned resin coatings are prone to breakage under high temperature conditions. , the flexibility of the coating becomes poor, which limits the use of the coating on the surface of special-shaped high-temperature resistant parts
[0004] In order to achieve the effect of radiation protection, it is usually necessary to add magnetic metal powder, but the magnetic metal powder will be oxidized when used in a high temperature environment for a long time, causing the material to lose its shielding effect

Method used

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  • High-temperature-resistant shielding paint and preparation method thereof
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  • High-temperature-resistant shielding paint and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a preparation method of high temperature resistant shielding coating, comprising the following steps:

[0034] S1. Add 10-9.0% of high temperature resistant resin matrix, 1.5-5% of additives and 15.0-25.0% of solvent into the reaction kettle according to mass percentage, and stir evenly under the condition of stirring speed of 1000-1200rpm.

[0035] S2. After adding 40.0-85.0% high-temperature-resistant filler under the condition of rotating speed of 500-600 rpm, stirring for 30 minutes until uniformly mixed under the condition of rotating speed of 1000-1200 rpm.

[0036] S3. Grinding the homogeneously mixed slurry on a three-roll machine for 3 to 5 times until the fineness is below 30 μm to obtain a high temperature resistant shielding coating.

Embodiment 1

[0039] Add 20g of high-temperature-resistant resin, 16g of solvent, and 1.2g of additives (except toughening materials) into the beaker. After stirring for 30 minutes at a speed of 1200rpm with a high-speed mixer, adjust the speed to 500rpm, and slowly add 10g of high-temperature-resistant filler. After adding the high-temperature-resistant filler, adjust the rotation speed to 1000rpm; and stir for 30 minutes, then add 2g of toughening material. Grinding on a roller machine, grinding 3 times to a fineness of 20 μm, to obtain a high temperature resistant shielding coating.

[0040] Spray the prepared coating horizontally on a 120mm×25mm tin plate, the wet weight of spraying can reach 12g, and the prepared coating of 0.5mm is subjected to high temperature for 5 hours until it is completely cured. The prepared coating is heat-treated at a high temperature of 500°C for 40 hours, the flexibility of the coating is ≤15mm, and the density is 1.79g / cm 3 , and the reflection loss of th...

Embodiment 2

[0042] Add 24g of high-temperature-resistant resin, 18g of solvent, and 1g of additives (except toughening materials) into the beaker. After stirring for 30 minutes at a speed of 1200rpm with a high-speed mixer, adjust the speed to 600rpm, and slowly add 8.5g of high-temperature-resistant filler. After adding the high temperature resistant filler, adjust the rotation speed to 1200rpm; and stir for 30 minutes, then add 2.8g of toughening material. Grinding is carried out on a three-roll machine, and the grinding is performed 5 times until the fineness is 25 μm to obtain a high-temperature-resistant shielding coating.

[0043] Spray the prepared coating horizontally on a 120mm×25mm tin plate, the wet weight of spraying can reach 9.6g, and the prepared coating of 0.5mm is subjected to high temperature for 5 hours until it is completely cured. The prepared coating is heat-treated at a high temperature of 550°C for 60 hours, the flexibility of the coating is ≤15mm, and the density ...

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Abstract

The invention discloses high-temperature-resistant shielding paint and a preparation method thereof, and relates to the field of electromagnetic wave shielding paint. The high-temperature-resistant shielding paint is prepared from the following ingredients in percentage by mass: 10 to 9.0 percent of high-temperature-resistant resin matrix, 40.0 to 85.0 percent of high-temperature-resistant filling material, 1.5 to 5 percent of additive and 15.0 to 25.0 percent of solvents, wherein the high-temperature-resistant resin matrix is at least one of organic silicon resin, modified organic silicon resin and polyimide; the high-temperature-resistant filling material is a magnetic material with a cladding layer; the cladding layer is SiO2, Al2O3, BN or graphene; the magnetic material is at least one of ferrite, carbonyl iron powder, iron silicon aluminum or iron silicon chromium; the additive is at least one of a toughening agent, an anti-settling agent, an antioxygen, a defoaming agent, a dispersing agent and a flatting agent. The paint is still stable at high temperature for a long period; high-temperature-resistant and shielding effects are good.

Description

technical field [0001] The invention relates to the field of electromagnetic wave shielding paint, in particular to a high temperature resistant shielding paint and a preparation method thereof. Background technique [0002] In some high-temperature places in industrial production, such as the surface of steel chimneys, high-temperature pipes, high-temperature furnaces, petroleum crackers, high-temperature reaction equipment, and military equipment, it is necessary to use shielding and high-temperature-resistant coatings to coat the surface of the equipment , to prevent the radiation in the equipment from causing harm to the human body and equipment, and at the same time, avoid equipment damage under high temperature, thereby prolonging the service life of the equipment and reducing the use cost of the equipment. [0003] The main components of existing high-temperature resistant coatings are resins, specifically including phenolic resins, epoxy-modified resins, polyimides o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D179/08C09D7/12
CPCC08L2201/08C08L2205/025C08L2205/03C09D179/08C09D183/04C09D7/62C08L83/04C08L79/08C08K9/10
Inventor 肖伟玲
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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