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PH-sensitive release-type corrosion inhibition anti-rust packing and preparation and synthesis methods thereof

A sensitive and corrosion-inhibiting technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of complex preparation methods, achieve the effects of simple preparation methods, wide sources of raw materials, and improved dispersibility

Active Publication Date: 2017-09-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above invention can effectively release the corrosion inhibitor when the metal is corroded, the preparation method is relatively complicated and usually requires multi-step reactions to achieve the goal

Method used

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  • PH-sensitive release-type corrosion inhibition anti-rust packing and preparation and synthesis methods thereof
  • PH-sensitive release-type corrosion inhibition anti-rust packing and preparation and synthesis methods thereof
  • PH-sensitive release-type corrosion inhibition anti-rust packing and preparation and synthesis methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 0.1 mol of 5-amino-1,3,4-thiadiazole-2-thiol (AMT) into a 250 mL three-necked flask, and slowly add 0.2 mol of NaOH aqueous solution dropwise under magnetic stirring until AMT is completely dissolved. Slowly add chloroacetic acid aqueous solution containing 0.1 mol chloroacetic acid dropwise at room temperature, and the dropwise addition is completed within 30 minutes. The reaction was carried out at room temperature for 3 h, and the progress of the reaction was detected by thin-layer chromatography. After the reaction is completed, dilute sulfuric acid is added dropwise to the reaction solution, and a light yellow solid precipitates out, which is filtered by suction, washed repeatedly with water and ethanol, and dried for 10 hours to obtain solid 5-amino-1,3,4-thiadiazole- 2-thioacetic acid;

[0057] Add 0.5g boehmite to a 250mL three-necked flask containing 100mL N,N-dimethylformamide, and after ultrasonic dispersion for 30min, add 0.01mol of the above-prepared 5...

Embodiment 2

[0059] Add 0.15 mol of 5-amino-1,3,4-thiadiazole-2-thiol (AMT) into a 250 mL three-necked flask, and slowly add 0.3 mol of NaOH aqueous solution dropwise under magnetic stirring until AMT is completely dissolved. Slowly add chloroacetic acid aqueous solution containing 0.15 mol chloroacetic acid dropwise at room temperature, and the dropwise addition is completed within 30 minutes. And react at 50° C. for 4 h, and detect the progress of the reaction by thin-layer chromatography. After the reaction is completed, dilute sulfuric acid is added dropwise to the reaction solution, and a light yellow solid precipitates out, which is filtered by suction, washed repeatedly with water and ethanol, and dried for 10 hours to obtain solid 5-amino-1,3,4-thiadiazole- 2-thioacetic acid;

[0060] Add 1.0g boehmite to a 250mL three-necked flask containing 200mL N,N-dimethylformamide, and after ultrasonic dispersion for 30min, add 0.02mol of the above-prepared 5-amino-1,3,4-thiadiazole-2- Thio...

Embodiment 3

[0062] Add 0.2 mol of 5-amino-1,3,4-thiadiazole-2-thiol (AMT) into a 250 mL three-necked flask, and slowly add 0.4 mol of NaOH aqueous solution dropwise under magnetic stirring until AMT is completely dissolved. Slowly add an aqueous solution of chloroacetic acid containing 0.2 mol of chloroacetic acid dropwise at room temperature, and the dropwise addition is completed within 30 minutes. And react at 80° C. for 3 h, and detect the progress of the reaction by thin-layer chromatography. After the reaction is completed, dilute sulfuric acid is added dropwise to the reaction solution, and a light yellow solid precipitates out, which is filtered by suction, washed repeatedly with water and ethanol, and dried for 10 hours to obtain solid 5-amino-1,3,4-thiadiazole- 2-thioacetic acid;

[0063] Add 0.5g boehmite to a 250mL three-necked flask containing 100mL N,N-dimethylformamide, and after ultrasonic dispersion for 30min, add 0.01mol of the above-prepared 5-amino-1,3,4-thiadiazole-2...

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Abstract

The invention provides a pH-sensitive release-type corrosion inhibition anti-rust packing and preparation and synthesis methods thereof. The pH-sensitive release-type corrosion inhibition anti-rust packing adopts the structure as shown in the description. Active sulfydryl in 5-amino-1,3,4-thialiazoline-2-thione reacts with chloroacetic acid to prepare a corrosion inhibitor with a carboxy group as an end group, and then the corrosion inhibitor is subjected to bonding with a hydroxyl group in boehmite through esterification reaction and is grafted onto the surface of boehmite, so that the pH-sensitive release-type corrosion inhibition anti-rust packing is prepared. The pH-sensitive release-type corrosion inhibition anti-rust packing is simple in preparation method and wide in raw material source, and the dispersity of boehmite is directly improved while the organic corrosion inhibitor is introduced. When applied to an anti-corrosion coating, the pH-sensitive release-type corrosion inhibition anti-rust packing can remarkably improve the corrosion resistance of the coating, and the service life of the coating is prolonged.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a pH-sensitive release corrosion-inhibiting and anti-rust filler and a preparation and synthesis method thereof. Background technique [0002] Epoxy anti-corrosion coatings have the advantages of excellent mechanical properties, chemical stability, dimensional stability and durability. Therefore, they are widely used in the field of organic anti-corrosion. In the preparation process of traditional epoxy anti-corrosion coatings, it is usually necessary to add an appropriate amount of anti-corrosion fillers to fill the micropore defects in the coating, thereby enhancing the anti-corrosion performance of the coating. However, during the use of conventional coatings, due to the effects of itself and the external environment, it is easy to cause defects such as pinholes and microcracks, which will not only weaken the protective effect of the coating, shorten the service lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00
CPCC08K9/04C08K2003/2227C09D5/08C09D163/00
Inventor 梁宇陈凯锋亓海霞
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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