A kind of preparation method of the nano-boehmite filler of surface graft corrosion inhibitor

A technology of nano-boehmite and surface grafting, which is applied in the field of preparation of nano-boehmite fillers, can solve problems such as difficulty in controlling the stability of the reaction process, agglomeration of products and final products, and difficulty in removing inorganic oxides, so as to improve the comprehensive Anti-corrosion performance, improved corrosion resistance, and easy operation

Inactive Publication Date: 2018-12-21
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0004] In view of the complex process of the above-mentioned existing inorganic filler surface modification methods, it is difficult to remove the inorganic oxides introduced in the process; it is difficult to control the reaction process so that the stability cannot meet the engineering requirements; most coupling agents have low solubility in water , resulting in serious agglomeration of the product in the modification process and the final product, thereby reducing the success rate of grafting and other problems. The present invention provides a method for preparing a nano-boehmite filler grafted on the surface of a corrosion inhibitor

Method used

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  • A kind of preparation method of the nano-boehmite filler of surface graft corrosion inhibitor
  • A kind of preparation method of the nano-boehmite filler of surface graft corrosion inhibitor
  • A kind of preparation method of the nano-boehmite filler of surface graft corrosion inhibitor

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preparation example Construction

[0028] A kind of preparation method of the nano boehmite filler of surface graft corrosion inhibitor, comprises the following steps:

[0029] Step 1: After drying the corrosion inhibitor, slowly add it into an anhydrous solvent under the condition of ultrasonic dispersion, and continue ultrasonic dispersion for 30 minutes at room temperature to obtain a corrosion inhibitor solution; the corrosion inhibitor is 5-amino-1 , 3,4-thiadiazole-2-thiol, 1,2,3-benzotriazole, mercaptobenzothiazole, tolyltriazole and other metal corrosion inhibitors; the anhydrous solvent is toluene or xylene and other benzene organic solvents; the drying process adopts a constant temperature drying method, specifically, the corrosion inhibitor is placed in a constant temperature drying box and dried to a constant weight, and the drying temperature is 80 ° C; the anhydrous solvent dewatering process uses Molecular sieve soaking method, specifically, soak the activated 3A molecular sieve in the solvent to...

Embodiment 1

[0034] Step 1: Weigh 19.6g of dried 5-amino-1,3,4-thiadiazole-2-thiol (AMT), and slowly add it into a beaker containing 2000mL of anhydrous xylene under the condition of ultrasonic dispersion AMT solution was obtained after continuous ultrasonic dispersion at room temperature for 30 minutes;

[0035] Step 2: Transfer the AMT solution into a three-necked flask, put 20mL of triethylamine catalyst, 18.2g of KBM-5103 silane coupling agent (the molar ratio of AMT to KBM-5103 is 2:1), and 0.2g of hydroquinone polymerization inhibitor in Slowly add to the AMT solution under the condition of 80°C temperature and high-speed stirring and dispersion, and continue to stir and react at 80°C for 6 hours;

[0036] Step 3: Weigh 18.2g of dried boehmite filler, slowly add it into a beaker containing 500mL of anhydrous xylene under the condition of ultrasonic dispersion, and obtain nano-boehmite filler suspension after continuous ultrasonic dispersion at room temperature for 30 minutes liquid;...

Embodiment 2

[0041] Step 1: Weigh 19.6 g of dried AMT, slowly add it into a beaker containing 2000 mL of anhydrous xylene under ultrasonic dispersion conditions, and obtain an AMT solution after continuous ultrasonic dispersion at room temperature for 30 minutes.

[0042] Step 2: Transfer the AMT solution into a three-necked flask, put 20mL of triethylamine catalyst, 36.5g of KBM-5103 silane coupling agent (the molar ratio of AMT to KBM-5103 is 1:1), and 0.2g of hydroquinone polymerization inhibitor in Slowly add into the AMT solution under the condition of 80°C temperature and high-speed stirring and dispersion, and continue to stir and react at 80°C for 6 hours.

[0043] Step 3: Weigh 36.5g of dried boehmite filler, slowly add it into a beaker containing 500mL of anhydrous xylene under the condition of ultrasonic dispersion, and obtain nano-boehmite filler suspension after continuous ultrasonic dispersion at room temperature for 30 minutes liquid.

[0044] Step 4: Add the nano-boehmite ...

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Abstract

The invention relates to a preparing method of a nanometer boehmite filling material having a surface grafted with a corrosion inhibitor. The corrosion inhibitor, a catalyst, a bridging agent and a polymerization inhibitor are adopted to perform surface grafting modification on the nanometer boehmite filling material, and therefore dispersity of a modified product is ensured, and the modified product has a corrosion inhibiting function. An active chemical group in the molecule structure of the bridging agent and Al-OH groups in the structure of boehmite form covalent bonds, the covalent bonds are adopted as compounds connecting the boehmite and the corrosion inhibitor and are subjected to grafting compositing, and therefore dispersity of the modified product is effectively improved, the modified nanometer boehmite filling material has a corrosion inhibition function, and comprehensive anti-corrosion performance of a coating can be significantly improved after the modified nanometer boehmite filling material is added into an epoxy anti-corrosion coating system. The method is simple and convenient in operation and low in cost. The prepared nanometer boehmite filling material having the surface grafted with the corrosion inhibitor overcomes the problem that epoxy boehmite anti-corrosion coating systems at present are insufficient in corrosion resistance.

Description

technical field [0001] The invention relates to the field of inorganic nano powder material modification technology and coating technology, in particular to a preparation method of nano boehmite filler of surface grafted corrosion inhibitor. Background technique [0002] Due to its excellent mechanical properties, chemical stability, dimensional stability and durability, epoxy anti-corrosion coatings are the largest and most widely used varieties in the field of organic heavy-duty anti-corrosion coatings. During the preparation of 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. Anti-corrosion fillers are mainly divided into physical filling type and chemical corrosion inhibition type according to their action forms. Among them, physically filled anti-corrosion fillers have the unique advantages of reduci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K9/06C08K3/22C09D5/08C09C1/40C09C3/08
CPCC08K3/22C08K9/04C08K9/06C08K2003/2227C08K2201/011C09C1/40C09C3/08C09D5/08
Inventor 许超亓海霞魏丰
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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