Alumina trihydrate (ATH) is an acidic, halogen-free flame retardant for a variety of plastics. Both compounds can be decomposed under endothermic conditions according to the following reaction formula: 2Al(OH)3 ---> Al2O3 + 3H2O; the gaseous water phase is believed to cover the flame and thus exclude oxygen, And dilute flammable gases. Similar to the function of phosphorus-containing flame retardants to form coke, an insulating substance is formed on the surface of the material in contact with the flame,

In order to improve its dispersion performance and flame retardant effect, magnesium hydroxide can be better used in the flame retardant of plastics and other composites. As a flame retardant, magnesium hydroxide has special requirements, such as small surface area, not easy to form agglomeration, and high Molecular materials have good compatibility and easy dispersion. Correspondingly, for the production of magnesium hydroxide flame retardant, it is necessary to adopt a different preparation technology from ordinary magnesium hydroxide. In normal temperature synthesis, the bases used are different. There are 3 methods: