There are many kinds of flame retardants and they are widely used

2022-08-08 16:26:45

Flame retardant is an additive that can make the polymer not easy to ignite, and the fire makes it burn slowly. According to the classification of elements contained in flame retardants, they can be divided into organic and inorganic flame retardants. Organic flame retardants can be divided into flame retardants, halogen flame retardants (including chlorine and bromine) and nitrogen flame retardants; Inorganic flame retardants include antimony compounds, phosphorus and phosphoric acid, boron compounds, aluminum magnesium hydroxide, zirconium compounds and bismuth compounds. With the development of science and technology and the improvement of people's awareness of environmental protection, the research and application of flame retardants in the world are moving towards non halogenation.

The representative of the application of inorganic flame retardants with aluminum hydroxide and magnesium hydroxide is formed by the decomposition of the insulating layer on the surface of magnesium oxide by the mass fraction of oxygen in the dilution air of the chemical decomposition endothermic and hot water. It is non-toxic, smoke and decomposition products inhibit the chemical stability of the (alumina, magnesium oxide) series, so it does not cause secondary damage. However, the use of aluminum hydroxide and magnesium hydroxide as flame retardants has the following disadvantages: first, the flame retardant efficiency is low, so a higher concentration is required; Second, it naturally presents hydrophilic and oleophobic surface properties and is difficult to uniformly disperse in organic polymers. Therefore, if the surface treatment of the polymer filled with magnesium hydroxide powder is not used, other properties of the polymer material (such as processing properties and mechanical properties such as severe deterioration) will be affected.

Flame retardant is a kind of chemical assistant that can effectively reduce the combustibility of combustible materials. There are many kinds of flame retardants and they are widely used. Among them, bromine flame retardant is one of them. However, the toxic gases such as hydrogen bromide released by bromine flame retardant during combustion cause secondary injury to human body,. In order to control the hazard of flame retardants at the lowest possible level, the following measures are recommended:

1. Carry out long-term science popularization to improve the public's awareness of the major hidden danger of PBDEs.

2. Provide qualified safe food for pregnant women and infants.

3. Workers who are directly exposed to PBDEs should pay special attention to food safety, do not eat in the open air and polluted environment, and wash hands carefully before eating.

4. Develop environmentally friendly flame retardant materials to replace PBDEs.