Magnesium hydroxide and organic bentonite: double improvement of EVA flame retardant properties

Today, as the world's requirements for environmental protection and flame retardant performance become increasingly stringent, halogen-free flame retardants have become a hot spot in research. In particular, magnesium hydroxide (Mg(OH)2) has become an ideal flame retardant for polymer materials such as EVA (ethylene-ethyl acetate copolymer) due to its non-toxic, low smoke, and high thermal stability properties. However, when magnesium hydroxide is used alone, the impact of its high addition amount on the mechanical properties of the material becomes a problem. Fortunately, the introduction of organobentonite provides a solution to this problem.

Discovery of synergistic flame retardant effect

The latest research shows that the combination of magnesium hydroxide and organic bentonite can significantly improve the flame retardant properties of EVA. The EVA/bentonite nanocomposite prepared by melt blending method has shown excellent flame retardant effect under the testing of advanced equipment such as vertical burner, cone calorimeter and thermogravimetric analysis. Compared with EVA using magnesium hydroxide alone, the flame retardant properties of composite materials added with organic bentonite have been significantly improved, melt dripping is reduced, flame intensity is reduced, ignition time is extended, and thermal oxygen stability is significantly improved. Keep improving.

Synergistic effect of modified magnesium hydroxide

Further research also found that the synergistic use of modified magnesium hydroxide and organic bentonite can maximize the flame retardant properties of materials such as polypropylene. When the mass ratio of magnesium hydroxide and bentonite reaches 37:3, the synergistic flame retardant effect is the best, which not only improves the flame retardant performance of the material, but also improves its mechanical properties. This discovery provides a new direction for the development of halogen-free flame retardants.

The synergistic flame retardant effect of magnesium hydroxide and organic bentonite provides an efficient and environmentally friendly solution for the flame retardant modification of polymer materials such as EVA. This synergistic system not only improves the flame retardant properties of the material, but also ensures the mechanical properties of the material, meeting the dual requirements of environmental protection and safety performance of the modern material industry. With the deepening of research, this synergistic flame retardant system is expected to be widely used in flame retardant plastics, rubber, textiles and other fields, becoming a new favorite in the field of flame retardant materials in the future.