Nylon can be halogen/antimony or other flame retardant synergistic system, also can use red phosphorus or melamine of halogen free flame retardant system to flame retardant. From the Angle of quantity, halogen/antimony cooperative system is still the most widely used nylon flame retardant system. In some parts of Europe and Asia, people are looking for alternatives to halogen flame retardants. But in general these alternative system generally has such problems as low thermal stability and moisture absorption. For red phosphorus, and storage problem, because its itself is flammable. Here are several flame retardant nylon used in the main, and their respective advantages and disadvantages.

(1) containing halogen flame retardant system: the most important of which is also one of the most widely used abroad is the styrene brominated polymer, it has extremely excellent thermal stability, and because it is melting can be mixed with nylon, therefore in the process of processing has good liquidity. In addition, the preparation of flame retardant nylon with it also has superior performance and good physical and mechanical properties. The limitations of this kind of flame retardant in poor light stability and is not fully compatible with nylon. In addition the cost and wide application at present domestic higher than ten bromine biphenyl ether. Another application for many years in nylon flame retardant is flammable, it is a kind of chlorine flame retardant, high flame retardant efficiency and performance, but its limitations in the thermal stability of applies only to the lower processing temperature nylon flame retardant system. One of the most widely used in domestic bromine flame retardants are ten stupid ether, due to its high bromine content of nylon has high flame retardant efficiency, is the most economical a flame retardant. But because it is a kind of packing type flame retardant, physical and mechanical properties of the processing of liquidity and the product has a lot of negative effects. In addition, the thermal stability and light stability also teach bad. In recent years, people have developed in the aspect of flame retardant nylon used as follows: a new flame retardant is 10 phenoxy ethane, it with bromine content in ten bromine biphenyl ether has the same and the same high flame retardant efficiency, and with styrene brominated polymer as no (the so-called second evil). In addition, it also has good thermal stability and light stability. Its limitation is that it is the same as ten bromine biphenyl ether are packing type flame retardant, poor compatibility with polymer, thus processing poor liquidity and products of the physical and mechanical properties. In addition to the rising cost of higher compared with 10 bromine biphenyl ether.

(2) the halogen-free flame retardant system: a wide application in nylon halogen-free flame retardants are red phosphorus and melamine salt. Red phosphorus flame retardant efficiency and improve product has a very high arc resistance, but its storage and color limitations greatly limits its application in nylon, typically used in nylon 6. Another kind of nylon used in halogen-free flame retardants is melamine salt, mainly is the melamine uric acid salt and phosphates. They has good flame retardant efficiency, but poor thermal stability, and because of the easy absorption of moisture and make products with poor performance in a damp environment.