Ultra-fine magnesium hydroxide surface modifying method

Abstract

The invention discloses a method for surface modification of superfine magnesium hydroxide. The method is to add a surface modifier to an aqueous solution of inorganic water-soluble magnesium salt, and slowly add it to the reaction with a precipitating agent in a stirring state. In the kettle, react at a temperature of 20°C to 100°C for 1-2 hours, and then filter, wash and dry the reaction solution to obtain the finished product. The invention utilizes the steric hindrance effect and coating effect of the surface modifier to effectively control the particle size of magnesium hydroxide, and obtains ultra-fine magnesium hydroxide with good dispersibility, strong functionality and high flame-retardant efficiency, and The process is simple, the raw materials are easy to obtain and the cost is low, non-toxic and pollution-free, and can be widely used in polymer material industries such as plastics, rubber, building materials and unsaturated polyester.

Description

technical field

[0001] The invention relates to a method for surface modification of magnesium hydroxide, specifically a method for surface modification of superfine magnesium hydroxide by using modifiers as nonionic surfactants and anionic surfactants. In order to obtain high-performance ultra-fine magnesium hydroxide. Background technique

[0002] In recent years, the production of polymer synthetic materials has developed rapidly, and their applications in various fields such as industry, agriculture, and national defense have become more popular, and they have played a huge role in the construction of the national economy. However, since most of these materials are combustible or inflammable, they are accompanied by a large amount of smoke and irritating and toxic gases during combustion. These gases and dense smoke will not only endanger people's lives, but also seriously corrode equipment and buildings, and at the same time pose a threat to fire protection. Work bring...

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