When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market salesMagnesium hydroxideThe particle size is large, and the particle size of some commodities can reach tens of microns. It is immediately used as a flame retardant, which has poor dispersion and great harm to the physical properties of raw materials. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.

More flame retardants were added in the comparison between organic and inorganic flame retardants, effectively reducing the efficiency of the flame retardants. In specific applications, in order to better achieveMagnesium hydroxideThe actual flame retardant effect of the flame retardant is stronger and must be applied to many polymer substrates. The addition of magnesium hydroxide will reduce the physical properties of the polymer. With industrial production-grade magnesium hydroxide as raw material, magnesium hydroxide with micro-nano-scale, reasonable structure and reasonable external economic structure can significantly reduce the addition of polymer substrate. The surface of micro-nano-scale magnesium hydroxide raw material has more exposed anions and cations, strong polarity, high surface activation energy, easy agglomeration, poor dispersion, and difficult to dissolve polymer substrate. Using the multi-functionality of special chemicals, any structural area or region of the raw material surface has a different structure. In addition, the area is decorated with molecular structures and isotopes of metal material molecules, which are widely used in the raw material industry. The surface modification of magnesium hydroxide adopts special chemical substances, which can solve the defects of high surface activation ability, strong polarity and easy agglomeration. The modified magnesium hydroxide has good compatibility with the polymer substrate. Therefore, the surface modification and super-optimization system of magnesium hydroxide has been widely concerned by scientific and technological workers at home and abroad.

As a kind of polymer flame retardant, it has good compatibility with the polymer to a large extent, completed the uniform dispersion, and finally achieved the flame retardant effect. The use of specific chemicals to modify the surface of magnesium hydroxide can reduceMagnesium hydroxideThe surface polarity makes it hydrophobic and improves the compatibility of magnesium hydroxide with the polymer. Organic chemical modification of the surface of magnesium hydroxide powder refers to the use of chemical methods to selectively adsorb or specially adsorb functional groups in organic molecules or inorganic suspected gel molecular structure, or produce chemical changes, and then wrap the surface of the particles to make the surface of the particles organic chemical or polar changes, and finally complete the surface modification. Commonly used surface modifiers mainly include silane coupling agents, titanate coupling agents, aluminate silane coupling agents, fatty acids, etc. The modification of magnesium hydroxide can also play other roles, such as changing the appearance of the particles and expanding their application range.