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Two-component water epoxy radiation-resistant paint for nuclear power plant

A radiation coating, a two-component technology, is applied in the field of protection and decoration of the concrete surface of the containment of nuclear power plants and nuclear auxiliary powerhouses. Effects of reduced adverse effects, improved radiation resistance, and good compatibility

Active Publication Date: 2010-07-21
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating is currently used on the surface of concrete and steel structures outside the containment of nuclear power plants. The decontamination rate of the coating is 86.5%, the adhesion (pull-off method) is 3.1Mpa, and the flame spread ratio is 38. Although these indicators can meet the specified standards , but still needs to be further improved and needs to stand the simulated DBA test (that is, the test of the paint film under the simulated design basis accident condition); Shanghai COSCO Kansai Paint Chemical Co., Ltd. discloses a special water-based epoxy coating for nuclear power plants and its preparation method ( Application No. 200710171686.0), it is used for the concrete surface of nuclear power plant nuclear island area, but it is a kind of waterborne epoxy coating that adopts the base material that the market buys to prepare, therefore, its coating performance is limited by the base material performance used, It is difficult to further improve. In addition, in order to improve the decontamination rate of the coating, a part of silicon-containing additives is selected in the paint formula. Although the decontamination rate has been improved, it seriously affects the adhesion between the coatings and also That is to say that the recoatability of the coating is poor; Guangzhou Xiupo Chemical Co., Ltd. discloses a radiation-resistant coating and a preparation method thereof for nuclear power plants (application number 200810026300.1), which belongs to solvent-free epoxy coatings, although it overcomes the problem caused by solvent volatilization. Harmful, but the inherent shortcomings of solvent-free epoxy coatings such as: brittle coating film, poor impact resistance; Its application has certain limitations

Method used

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  • Two-component water epoxy radiation-resistant paint for nuclear power plant
  • Two-component water epoxy radiation-resistant paint for nuclear power plant
  • Two-component water epoxy radiation-resistant paint for nuclear power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]The aqueous amine-epoxy adduct of the amine termination in the preparation component A of embodiment 1

[0031] Concrete synthetic steps are as follows:

[0032] ① Preparation of raw materials for synthesis

[0033] The percentages of the amount of each raw material in the total weight of raw materials are as follows: olefin-based polyamine 8-15%, monofunctional glycidyl ether 5-12%, polyether polyol 5-15%, bisphenol A diglycidyl ether 10% ~20%, co-solvent 10-20%, catalyst 0.1-1.0% and deionized water as the balance, the specific formula is shown in Table 1.

[0034] Table 1

[0035]

[0036]

[0037] Note: "Percentage" refers to the percentage of the amount of the raw material in the total weight of the raw material.

[0038] ②In a reactor equipped with stirring and heating equipment, a nitrogen conduit reflux condenser and a thermometer, add an appropriate amount of toluene solvent and a formula amount of bisphenol A diglycidyl ether and polyethylene glycol 20...

Embodiment 2

[0041] Embodiment 2 prepares the emulsifier in component B

[0042] 1. Formula

[0043] The percentages of the amount of each raw material in the total weight of raw materials are as follows: bisphenol A epoxy resin 3-14%, polyether polyol 35-47%, catalyst 0.2-1%, deionized water as the balance, the specific formula see Table 2.

[0044] Table 2

[0045]

[0046] Note: "Percentage" refers to the percentage of the amount of the raw material in the total weight of the raw material.

[0047] 2. Operation method

[0048] In a reactor equipped with stirring, heating equipment, nitrogen conduit and thermometer, add the formula amount of polyethylene glycol 4000 and epoxy E-51 and heat to 60-70°C, stir until the resin is completely dissolved, stop heating, and slowly drop Add boron trifluoride ether solution, the reaction is an exothermic reaction, when the temperature is stable, control the temperature at 70-80°C for 1 hour, then slowly raise the temperature to 90-100°C, and ...

Embodiment 3

[0049] The epoxy-polyacrylate interpenetrating network polymer in the preparation component B of embodiment 3

[0050] 1. Formula

[0051] The percentages of the amount of each raw material in the total weight of the raw materials are as follows: 50-90% of bisphenol A epoxy resin, 10-50% of the total amount of acrylate monomer or acrylate monomer and styrene, and 0.3-50% of the initiator 1%, the specific formula is shown in Table 3.

[0052] table 3

[0053]

[0054] Note: "Percentage" refers to the percentage of the amount of the raw material in the total weight of the raw material.

[0055] 2. Operation method

[0056] In a reactor equipped with stirring, heating equipment, nitrogen conduit, condenser and thermometer, add the prescribed amount of epoxy E-51 and heat to 80-90°C, stir until the resin is completely dissolved, and then slowly drop each acrylate mono The mixed solution composed of body, styrene and catalyst, dripped in 2 hours; after the dropwise addition,...

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Abstract

The invention relates to a two-component water epoxy radiation-resistant paint for a nuclear power plant. The paint comprises a component A and a component B, wherein the component A contains the following raw materials by weight percent: 30-50 percent of amine terminated water amine-epoxy adduct, 20-40 percent of pigment, 5-15 percent of filler, 0.05-0.5 percent of defoaming agent, 0.1-1 percent of wetting dispersant, 1-10 percent of cosolvent and rest percent of deionized water; and the component B contains the following raw materials by weight percent: 40-60 percent of epoxy-polyacrylic ester interpenetrating network polymer, 5-10 percent of emulsifier and rest percent of deionized water. The weight ratio of the component A to the component B is 2.5-3.5:1. The amine terminated water amine-epoxy adduct, the epoxy-polyacrylic ester interpenetrating network polymer and the emulsifier in the component B are self-made. The paint is environment-friendly, satisfies the requirement on the nuclear grade paint of the nuclear power plant and passes the simulation DBA test.

Description

technical field [0001] The invention relates to a two-component water-based epoxy radiation-resistant coating for nuclear power plants, which is especially suitable for the protection and decoration of the concrete surface of the containment shell of the nuclear power plant and the auxiliary nuclear power plant. Background technique [0002] At present, the coatings used for the concrete surface protective layer in the domestic nuclear power plant containment are mainly epoxy coatings, which are widely used because of their good anti-corrosion performance, chemical stability, nuclear radiation resistance and good adhesion. Epoxy coatings are divided into two types: solvent-based and water-based. Among them, solvent-based epoxy coatings have mature technology, moderate price, and relatively good performance indicators, so they are widely used. However, its volatile organic compound (VOC) content is high, which is harmful to the health of construction workers and the environme...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D151/08C09D7/12C09D5/32G21F1/10
Inventor 王留方刘志远朱亚君张睿倪爱兵赵宝华移易
Owner CHINA NAT OFFSHORE OIL CORP
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