Analysis of the difference between halogen-free flame retardants and halogen-free flame retardants
- time:
- 2019-05-13
What are the differences between halogen-free flame retardants and halogen-free flame retardants?
The purpose of adding flame retardants in plastics products is to reduce the flame retardant coefficient of products, so that products have flame retardant properties and reduce the hazards to ** in case of fire. At present, the flame retardant products used in the market are divided into environmental protection, organic and inorganic. Organic flame retardants are divided into two series: phosphorus series and halogen series. Phosphorus series flame retardants generally produce many harmful substances when fire occurs, which cause harm to human body. Therefore, the use of organic phosphorus series flame retardants is limited to a certain extent, while organic phosphorus series flame retardants are used in nylon or P. E pipe has flame retardant effect, while other plastic products have little flame retardant effect, so most plastic products rely on halogen flame retardant to achieve flame retardant.
1. Halogen-containing flame retardants refer to PP Flame Retardants Containing Cl, Br, F and other elements. Halogen-free flame retardants include phosphorus series flame retardants, inorganic flame retardants such as magnesium hydroxide, aluminium hydroxide, zinc borate, etc. In addition, halogen-free flame retardants also include intumescent flame retardants and some special flame retardants.
2. Halogen-containing flame retardants are the most widely used flame retardant products in plastic rubber materials at present. They are mainly organic flame retardants with inert chemical properties, good compatibility with plastics, good flame retardant effect and low cost. Many characteristics can not be replaced by other flame retardants.
3. The EU directive considers that octabromodiphenyl ether and pentabromodiphenyl ether in halogen-containing flame retardants burn to produce dioxins (carcinogens), which are listed in the prohibited list, and Decabrominated diphenyl ether is also a non-recommended flame retardant because of controversy. However, most of the brominated flame retardants have not been completely banned. In fact, it is very difficult to find a product to replace them completely.
4. There is no restriction on the use of Decabrominated biphenyl ether flame retardant in China, as for its harmfulness and sometimes alarmism. Its harmfulness is not necessarily as terrible as legendary. Fire retardants do little harm to nature and human beings. Inorganic flame retardants, the main varieties are aluminium hydroxide, magnesium hydroxide, red phosphorus, antimony oxide, molybdenum oxide, ammonia molybdate, zinc borate, zinc oxide, zirconium oxide, zirconium hydroxide and so on. These flame retardants can not only flame retardant, but also play a filling role. They have good environmental protection performance and are used more and more.
