Magnesium Hydroxide Flame Retardant: A Scientific Journey and Industrial Truth from Minerals to Materials

Strictly from a chemical perspective, magnesium hydroxide (Mg (OH) ₂) is indeed a precipitate. In the laboratory, adding alkali (such as sodium hydroxide) to a solution containing magnesium ions will produce a white flocculent precipitate of magnesium hydroxide. Its solubility product (Ksp) is very small and difficult to dissolve in water. The pH range for complete precipitation is between 9.4-12.4. This' precipitation 'is a chemical concept that describes the process and behavior of its precipitation from a solution.

However, in the field of flame retardant industry, there has been a fundamental change in the situation. The "magnesium hydroxide flame retardant" we usually refer to does not refer to products obtained by the chemical precipitation method mentioned above, but rather products obtained through a series of deep processing methods such as physical crushing, grinding, grading, and surface modification of natural mineral brucite (whose main component is magnesium hydroxide). The essence of this "mineral method" or "physical method" of magnesium hydroxide is processed mineral powder, rather than the precipitate product of chemical reactions.