Halogen-free flame retardants are one of the fastest-growing varieties of various material additives. The purpose of halogen-free flame retardants is to make non-flame retardant materials have flame retardant properties, which are not easy to burn or self-extinguish under certain conditions. With the continuous progress of halogen-free flame retardant technology, there are more and more types of halogen-free flame retardants, and their performance has also been greatly improved. Today, there are two main flame retardant effects of halogen-free flame retardants: one can delay fire events and inhibit the spread of fire, and inhibit the combustion reaction through various action principles, and the other is to rapidly expand and carbonize the surface material to form The protective layer. With the continuous improvement of people's awareness of environmental protection and safety, as well as the continuous research and development and progress of new technologies, halogen-free flame retardants will have greater development in the future. Today, I will tell you about the four development trends of halogen-free flame retardant fuels in the future, and I hope it will be helpful to you.

1. Carbon deposition technology. When the polymer is burned, carbon is formed in the condensed phase, which can achieve the purpose of flame retardancy. When the thickness of the carbon layer on the surface of the material reaches 1 mm, it can withstand a high temperature of 743 ° C without catching fire. In coatings, pentaerythritol, polyphosphoric acid and trimeramine can be used as good carbonizing agents, carbonization catalysts and foaming agents, respectively. If the three are added to the coating in a certain proportion, it can be made into a halogen-free flame retardant coating with excellent performance. In addition, the use of carbonizable polymers to blend with non-carbonizable polymers also has a good flame retardant effect. And greatly improve the flame retardancy; such as adding a small amount of halogen-free halogen-free flame retardant gas phase fire extinguishing, with high flame retardant performance. This carbonization technology will be widely used.

2. Smoke elimination technology. Since the halogen-free flame retardant is added to the polymer, the amount of smoke can be increased, so smoke suppression has become an important research topic. Smoke suppressants are additives that can effectively reduce smoke volume and smoke density. Focusing on PVC, smoke suppressants containing molybdenum compounds are the most effective smoke suppressants.

3. Microencapsulation technology. Microencapsulation can prevent the migration of halogen-free flame retardants, improve the flame retardant effect, improve the stability, and change the dosage form. Microencapsulation technology research has become the forefront of flame retardant technology research.

4. Micronization. Halogen-free flame retardants such as magnesium hydroxide and aluminum hydroxide need to be micronized with new technologies and new devices to improve their fluidity, processability and flame retardant effect. The average particle size of magnesium hydroxide is required to reach 15m, and the particle size of aluminum hydroxide and antimony oxide is required to be finer.