Flame retardants play an irreplaceable role in specific fields

2021-05-28 16:14:06

There are many kinds of flame retardants. According to the classification of chemical elements, they can be divided into halogen-free flame retardants and halogen-free flame retardants. Halogenated flame retardants include brominated or chlorinated flame retardants, in which organic brominated flame retardants are the main ones; Halogen free flame retardants include phosphorus, phosphorus nitrogen, inorganic metal hydroxide, boron, silicon and molybdenum.

Different flame retardants have their own characteristics and play their own advantages in different application fields, while some halogen-containing flame retardants play an irreplaceable role in specific fields. No matter halogenated or halogen-free flame retardants, environmental protection, low toxicity, high efficiency and multi-function should be the common development direction of flame retardants.

In view of the popular saying that "halogen-free is environmental protection" in today's society, the experts in flame retardant industry clearly put forward the view that "halogen-free is not the pronoun of environment-friendly" at a certain meeting of China flame retardant society, which has been widely recognized by the industry. All kinds of flame retardants should be treated scientifically. The development of new technologies and new products of halogen-containing and halogen-free flame retardants should be balanced. Halogen free flame retardants should not be simply regarded as environmental protection. These experts believe that the judgment of environmental protection of flame retardants is not necessarily related to whether they contain halogen.

Its main advantage is high efficiency; It has little effect on the photostability or the effect of light stabilizer; The corrosion is small in processing and combustion; It has the function of retarding reburning; Little or no increase in the quality of flame retardant materials. But most of the phosphate flame retardants also have some disadvantages. Such as volatile, poor heat resistance, compatibility is not ideal, and there are drops in the combustion.

The main products of phosphorus containing inorganic flame retardant are ammonium phosphate, red phosphorus flame retardant, ammonium polyphosphate, etc. With the increase of the amount of halogen-free flame retardant materials, the amount of red phosphorus flame retardant is also increasing. The flame retardant effect of red phosphorus is better than that of phosphate. Phosphorus containing inorganic flame retardants are widely used because of their non-volatile, non thermal stability, long-lasting effect, corrosive gas generation and low toxicity.