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Preparation method of aluminium dihydrogen phosphate paint for silicon steel

A technology of aluminum dihydrogen phosphate and coatings, which is applied to chemical instruments and methods, coatings, phosphorus compounds, etc., can solve the problems of many impurities, achieve the effects of less impurities, improve insulation and adhesion, and reduce cracks

Inactive Publication Date: 2017-03-15
湖北武洲新材料科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is to propose a preparation method of aluminum dihydrogen phosphate coating for silicon steel in view of the problem that the existing aluminum dihydrogen phosphate contains more impurities

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  • Preparation method of aluminium dihydrogen phosphate paint for silicon steel
  • Preparation method of aluminium dihydrogen phosphate paint for silicon steel
  • Preparation method of aluminium dihydrogen phosphate paint for silicon steel

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preparation example Construction

[0013] see figure 1 , figure 1 It is a flow chart of the preparation method of the aluminum dihydrogen phosphate coating for silicon steel in the first embodiment of the present invention. The invention provides a method for preparing an aluminum dihydrogen phosphate coating for silicon steel. The preparation method for the aluminum dihydrogen phosphate coating for silicon steel comprises steps:

[0014] In step S11, 100 parts by weight of aluminum hydroxide is washed with hot water above 50°C. The optimum temperature of hot water is 60°C-70°C, and the weight is the same as that of aluminum hydroxide. When washing, the washing degree should reach the pH value of the washing water to reach 7-8. On the one hand, this step is to wash off the residual sodium hydroxide in the aluminum hydroxide to avoid the reaction of Na+ ions and phosphoric acid; on the other hand, it is to activate the aluminum hydroxide, which is beneficial to the reaction of aluminum hydroxide and phosphori...

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Abstract

The invention relates to a preparation method of aluminium dihydrogen phosphate paint for silicon steel. The preparation method of aluminium dihydrogen phosphate paint for silicon steel comprises the following steps: washing 100 parts by weight of aluminium hydroxide by the use of hot water of 50 DEG C and above; adding 50-65 parts by weight of phosphoric acid into a reaction vessel, heating to 65-75 DEG C, and stirring while adding aluminium hydroxide; stopping stirring after adding all aluminium hydroxide, finishing the reaction after 20-40 min, cooling to 45-55 DEG C, and filtering; and defecting and analyzing, and regulating pH value. The produced aluminium dihydrogen phosphate contains few impurities and is easy to be compatible with other components in the paint for silicon steel. Stability of an insulating coating solution is raised. In addition, free phosphoric acid in the prepared aluminium dihydrogen phosphate is reduced such that cracks on the surface of the coating are reduced. Thus, it helps enhance insulating property and adhesion of the coating.

Description

technical field [0001] The invention relates to a preparation method of chemical substances, in particular to a preparation method of aluminum dihydrogen phosphate coating for silicon steel. Background technique [0002] As an important part of phosphate, aluminum dihydrogen phosphate has played an important role in various sectors of the national economy. Due to the structural characteristics and physical and chemical properties of aluminum dihydrogen phosphate, it has become a coating material with great potential in the field of high temperature oxidation resistance, especially in the field of silicon steel coating, and has become an indispensable component of silicon steel coatings. point. Aluminum dihydrogen phosphate is the main component in the insulating coating solution for silicon steel. Aluminum dihydrogen phosphate mainly acts as a binder in the insulating coating solution. However, the free phosphorus in aluminum dihydrogen phosphate is unstable, making the sur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C01B25/36
CPCC01B25/36C09D1/00
Inventor 曾微
Owner 湖北武洲新材料科技有限公司
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