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High-temperature-resistant shielding putty with high flame retardance and high bonding strength and preparation method thereof

A high flame-retardant, high-temperature-resistant technology, applied in the field of nuclear radiation protection, can solve problems such as difficulty in ensuring the stability and safety of material structure, low bonding strength of shielding putty, difficulty in meeting the requirements of special devices or accessories, etc.

Inactive Publication Date: 2021-09-10
NUCLEAR POWER INSTITUTE OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The bonding strength of existing shielding putty in the field of nuclear radiation protection is low, ranging from 0.5MPa to 2MPa. It is difficult to ensure the structural stability and safety of the material in the working conditions, and the stability of the splicing of the shielding body cannot be guaranteed, and it is difficult to meet certain requirements. Requirements for special devices or accessories

Method used

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  • High-temperature-resistant shielding putty with high flame retardance and high bonding strength and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A high temperature-resistant shielding putty with high flame retardancy and high bonding strength, which is composed of the following components in weight percentage:

[0035] 16.35wt% epoxy resin, 60wt% lead powder, 5.11wt% boron carbide, 4.54wt% alicyclic amine, 14wt% aluminum hydroxide.

[0036] Concrete preparation process is as follows:

[0037] S1. Add epoxy resin and aluminum hydroxide to the vacuum mixing system in proportion, stir at a rate of 30r / min for 10min, and stir evenly;

[0038] S2. Add lead powder and boron carbide, and stir at a rate of 30r / min for 20min under vacuum conditions to stir evenly;

[0039] S3. Add aluminum hydroxide, continue stirring at a rate of 70r / min for 30 minutes, and pour according to different construction requirements or joint filling structure requirements;

[0040] The degree of vacuum in steps S1-S3 is 1-2 Pa during the stirring process.

Embodiment 2

[0042] A high temperature-resistant shielding putty with high flame retardancy and high bonding strength, which is composed of the following components in weight percentage:

[0043] Epoxy resin 7.825wt%, lead powder 80wt%, boron carbide 5.47wt%, alicyclic amine 1.815wt%, aluminum hydroxide 4.89wt%.

[0044] Concrete preparation process is as follows:

[0045] S1. Add epoxy resin and aluminum hydroxide to the vacuum mixing system in proportion, stir at a rate of 30r / min for 10min, and stir evenly;

[0046] S2. Add lead powder and boron carbide, and stir at a rate of 40r / min for 20min to stir evenly under vacuum conditions;

[0047] S3. Add aluminum hydroxide, continue to stir at a rate of 60r / min for 30 minutes, and pour according to different construction requirements or joint filling structure requirements;

[0048] The degree of vacuum in steps S1-S3 is 1-2 Pa during the stirring process.

Embodiment 3

[0050] The present embodiment is based on embodiment 1, and the difference with embodiment 1 is, by weight percentage, is made of following components:

[0051] 16wt% epoxy resin, 60wt% lead powder, 10wt% boron carbide, 4wt% alicyclic amine, 10wt% aluminum hydroxide.

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Abstract

The invention discloses high-temperature-resistant shielding putty with high flame retardance and high bonding strength and a preparation method thereof; the high-temperature-resistant shielding putty comprises a matrix, gamma-ray shielding filler, neutron-ray shielding filler, a flame retardant and a curing agent, wherein the matrix is epoxy resin, the flame retardant is aluminum hydroxide, and the curing agent is alicyclic amine. The high-temperature-resistant shielding putty provided by the invention not only meets high temperature resistance, but also has good shielding performance and flame-retardant and bonding functions, the thermal weight loss of the material can be less than 4% when the material is continuously used for 300 days at the temperature of 160 DEG C, and the high-temperature-resistant shielding putty can meet radiation shielding and structural safety performance under harsh conditions.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation protection, in particular to a high-temperature-resistant shielding putty with high flame retardancy and high bonding strength and a preparation method thereof. Background technique [0002] In the radiation protection design of nuclear facilities, the splicing of the shield will be carried out when the shield is constructed around the radioactive source. Due to the difference in position and structure, there will be some gaps of irregular shape and structure during the splicing process, which need to be filled and bonded with shielding putty to ensure its structural stability and radiation protection safety. At the same time, in many shielding occasions, it is required to have good flame retardancy, good thermal stability, and prevent the risk of fire. Therefore, in addition to the flame retardancy required for the shielding material itself, high flame retardancy and high bonding stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/34G21F1/10
CPCC09D5/34G21F1/103
Inventor 魏梦玲杨静张静李书良蔡垚余少杰李统业高心蕊
Owner NUCLEAR POWER INSTITUTE OF CHINA
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