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A kind of preparation method of high swimming power emulsion

A technology for penetrating power and emulsion, which is applied in the field of preparation of emulsion with high penetrating power, can solve problems such as difficulty, reducing the thickness of the paint film of the outer panel, complexity and the like

Active Publication Date: 2022-02-18
湖南伟邦汽车涂料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main method is to add polypolyol and use cross-linked emulsion to reduce the paint film thickness of the outer panel. However, how to make a stable high-throwing power coating, especially a high-throwing power emulsion is a complicated and difficult process.

Method used

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  • A kind of preparation method of high swimming power emulsion
  • A kind of preparation method of high swimming power emulsion

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Experimental program
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Embodiment

[0031] 1. Preparation of crosslinking agent:

[0032] S1. Put 7.6% methyl ethyl ketone and 10.8% trimethylol propane into the dropping tank, turn on the stirring, and raise the temperature of the dropping tank to 65°C (not to exceed 75°C), so that the trimethylol propane is dissolved in the methyl ethyl ketone , prepared into a mixed solution and kept warm at 50-75°C for use;

[0033] S2. Add 43.5% toluene diisocyanate, 5% methyl ethyl ketone, and 0.02% dibutyltin dilaurate to the reaction kettle, stir under nitrogen atmosphere, and heat up to 45°C; then slowly add the mixed solution obtained in S1 dropwise at a uniform speed, and react The temperature of the kettle is controlled at 55-60 ° C, fully stirred, and the mixture is added dropwise and then kept for 1 hour;

[0034] S3, continue to add 33.08% ethylene glycol butyl ether dropwise, control the temperature of the reaction kettle at 65-70°C, after the dropwise addition, keep the temperature at 75°C for 2 hours, take a s...

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Abstract

The invention discloses a method for preparing a high-penetrating emulsion, which includes the preparation of a crosslinking agent, chain extension, amination, neutralization and emulsification; two additions of dimethylbenzylamine and bisphenol A are used for chain extension. Materials such as polyoxyethylene ether, methyl monoethanolamine, diethylenetriamine ketimine, and trimethylolpropane were designed and controlled for the temperature and time parameters in the preparation process. The preparation method of the invention can prepare the emulsion with high throwing power, the throwing power can reach 22 cm, and the storage stability of the emulsion is obviously improved.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a preparation method of a high throwing power emulsion. Background technique [0002] The development of electrophoretic coatings originated in the 1930s, and the early development mainly focused on anodic electrophoretic coatings. However, in practical applications, due to the disadvantage of dissolving the anode during the electrodeposition process of the anodic electrophoretic coating, the dissolution of metal ions will cause the pollution of the tank solution, making it unstable, increasing the maintenance cost of the tank solution, and causing the corrosion resistance of the paint film to decrease. Promoted the development of cathodic electrophoretic coatings. Since the metal workpiece of the cathodic electrophoretic coating is the cathode, the phosphating layer will not be damaged; during the electrodeposition process, there will be no metal ions to dissolve and pollute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/44
CPCC09D5/4438
Inventor 王永唐瑞华段誉黎文玉
Owner 湖南伟邦汽车涂料有限公司
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