Polymeric materials are widely used, but almost all of the polymer materials are easy to burn, part of the polymer material burning will produce a lot of harmful gases and smoke, Inorganic Compound the resulting fire hazard has become a global concern. Addition of effective flame retardant, so that the polymer material with flame resistance, self-extinguishing and smoke, is the current flame retardant technology in the more common method. The most representative of the inorganic metal compound flame retardants is aluminum hydroxide (ATH). Inorganic Compound ATH is now an example of several inorganic metal compound flame retardant several treatment methods.
On the inorganic metal compounds Flame retardants have the following methods:
(1), surface modification: inorganic flame retardant has a strong polarity and hydrophilicity, with non-polar polymer material compatibility is poor, the interface is difficult to form a good combination and bonding. In order to improve the adhesion and interface affinity between ATH and the polymer, Inorganic Compound it is one of the most effective methods to treat ATH flame retardants by coupling agent. Commonly used coupling agents are silanes and titanates. The surface activity of the treated ATH is improved, the affinity with the resin is increased, the physical and mechanical properties of the product are improved, the processing fluidity of the resin is increased, the moisture absorption rate of the ATH surface is reduced, and the flame retardant product Various electrical properties, flame retardant effect from V-1 level to V-0 level.
(2), ultra-fine: ATH ultra-thin, nano-is the main research and development direction. The addition of ATH will reduce the mechanical properties of the material, Inorganic Compound but by the micro-ATH and then fill, but will play a rigid particle plasticization enhancement effect, especially nano-materials. Flame retardant role is played by the chemical reaction, the same amount of flame retardants, Inorganic Compound the smaller the particle size, the greater the surface area, the better the flame retardant effect.
(3), macromolecule bonding treatment: the use of macromolecule bonding method to deal with ATH better than aluminate coupling agent. The surface tension of the modified ATH is obviously decreased, the contact angle with the nonpolar liquid is small, and the contact angle with the polar liquid is obviously increased, which can improve the mechanical properties of the polymer after filling.