In recent years, inorganic filler has been widely used to prepare flame retardant polymer materials, the use of aluminum hydroxide and magnesium hydroxide are more common. However, with the continuous expansion of the production and sales scale of light magnesium carbonate, more and more light magnesium carbonate is used as filling material. Meishen Technology company is professional in producing magnesium carbonate, had have rich experience in industries applications. It used as reinforcing agent and filling agent in rubber; Also can be used as heat insulation, high temperature resistant fire insulation materials.
Light magnesium carbonate, also known as industrial hydrated basic magnesium carbonate or basic magnesium carbonate, is white monoclinic crystal or amorphous powder, non-toxic, tasteless, and has a relative density of 2.16. As a new type of filler, light magnesium carbonate is lighter than ordinary inorganic filler. At the same time, when the composite material is burning, light magnesium carbonate can not only release crystalline water, generate oxide barrier layer, but also release carbon dioxide, play a role in diluting combustible gas, so it can be fireproof.
The purpose of modifying light magnesium carbonate with stearic acid is to study the effect of stearic acid dosage, reaction temperature and reaction time on the modification effect. The sedimentation volume, oil absorption value and activation degree of modified light magnesium carbonate were measured and characterized by infrared spectroscopy and thermal weightlessness. After modification, the hydrophilic surface of light magnesium carbonate changed to oil-philic surface. Stearic acid and light magnesium carbonate are not simply physical adsorption, but a chemical reaction, formed a new chemical bond. It shows that it is not simply adsorbed on the surface of light magnesium carbonate, but has chemical interaction with polar groups on the surface of light magnesium carbonate, and firmly grafted on the surface of light magnesium carbonate in the form of chemical bond.