Hebei Messi Biology Co., Ltd. stated that by reacting soluble magnesium salts (active magnesium oxide, magnesium hydroxide) with aluminum salts and carbonate ions in a certain alkaline environment, water with high crystallinity and a single crystal form can be generated. Talc. The production method is simple and easy to implement, and the conditions are easy to control, which is conducive to future industrialization promotion.
Through a large number of experiments, the influence of factors such as the source of raw materials, temperature, reaction time, pH value, Mg/Al ratio on the structure and properties of synthetic hydrotalcite was discussed, so that the reaction conditions can be controlled during the reaction process to meet production needs. The anionic surface treatment agent sodium oleate was used to surface treat hydrotalcite, and the effects of sodium oleate dosage, temperature, pH value and other conditions of the treatment environment on the treatment effect were studied. Through surface treatment, the agglomeration of hydrotalcite particles and the compatibility with the polymer matrix are better improved. Using LLDPE/EVA blend as the matrix resin, the properties of the composite system of hydrotalcite and matrix resin were studied. Experimental results show that hydrotalcite can significantly improve the flame retardant properties of the matrix resin
Hebei Messi Biology Co., Ltd. stated that hydrotalcite has relatively high requirements for heavy metals and impurities, so it abandoned the magnesium nitrate used in the initial experiment and replaced it with the current magnesium hydroxide or magnesium oxide. Magnesium hydroxide is a very fine chemical raw material with a uniform particle size distribution. It is recognized as a low-smoke, halogen-free, environmentally friendly flame retardant and is widely used. The preparation method of hydrotalcite requires the addition of magnesium hydroxide. . The content of magnesium hydroxide in hydrotalcite is about 60%, which is mainly used to extract magnesium and is the basic raw material for synthesizing hydrotalcite. Since hydrotalcite will be used in specific industries, the particle size and whiteness requirements of magnesium hydroxide are relatively high, and iron, manganese and black spots must be controlled within a certain range.