1. Halogen-free flame retardants
Halogen-free flame retardants, as the name suggests, do not contain halogens and have relatively good flame retardant effects. The main components are phosphorus-based compounds and metal hydroxides. It has the advantages of non-volatile and no corrosive gas during combustion, and is called a pollution-free flame retardant. In addition, there are several new types of halogen-free flame retardants such as silicon series and nitrogen series. Halogen-free flame retardants have become new products that conform to the development trend of international standards for flame retardants because of their clean, environmentally friendly and pollution-free advantages.
2. Inorganic flame retardants
Generally, inorganic compounds with flame retardant or smoke suppression effects such as hydroxide (aluminum hydroxide, magnesium hydroxide), red phosphorus, tin, borate (zinc borate) are added to the formulation of the polymer. The advantage of flame retardant is that it not only has the effect of flame retardant, but also can suppress smoke and inhibit the generation of hydrogen chloride. It has the advantages of non-toxicity, non-corrosiveness, and wide application. Especially in today's society, the environmental protection requirements are increasingly strengthened, so the competitiveness is becoming more and more. The stronger shows the strong development potential. The disadvantage is that the flame retardant efficiency is relatively low and the addition amount is large, and the excessive addition amount will affect the original performance of the polymer.
3. The relationship between the two
The difference is that inorganic flame retardants do not contain carbon and its carbon compounds, while inorganic flame retardants can contain halogen elements but halogen-free flame retardants are flame retardants that do not add halogens. Inorganic flame retardants such as aluminum hydroxide, red phosphorus, expandable graphite, etc. are halogen-free inorganic flame retardants that are both halogen-free and inorganic. They have good thermal stability, non-volatile, high stability and low price. Give full play to its advantages and apply it widely.
