Magnesium hydroxide is the second largest sales volume of inorganic hydroxide flame retardants. It is a white to light white lens powder with a relative density of 2.4 and a Mohs hardness of 3.0. When heated to above 450°C, the weight will be reduced by 30.9% (mass fraction) due to the loss of water.
When magnesium hydroxide is used as a Flame Retardant, its purity requirements are quite high, containing at least 98.5% magnesium hydroxide, and many grades are higher than 99.5%. Most flame retardant grades are white powders, with particle diameters ranging from 0.5 to 5 μm. The surface area is 7~15 square meters/g. Most of the magnesium hydroxide used as a flame retardant has been surface treated to improve its dispersion and distribution in the polymer. Magnesium hydroxide and aluminum hydroxide are used in a higher dosage, generally 50% to 70%. Due to high purity requirements and surface treatment requirements, magnesium hydroxide is more expensive than precipitation grade aluminum hydroxide.
Magnesium hydroxide is used to process thermoplastics and thermosetting resins with a processing temperature of 200~225℃. Mainly used in EVAC, PP and blends, ABS and blends, fluoropolymers, PPE and blends, polyimides, etc. Cannot be used for thermoplastic polyester. Magnesium hydroxide is used together with aluminum hydroxide to meet different requirements. Magnesium hydroxide is also used in parts such as wires and cables, racks, building multilayer boards, pipes, and electrical appliances.
Novista Group supplies APP, MCA, aluminium hydroxide,magnesium hydroxide to global market.
