A brief analysis of the mechanism and uses of organophosphorus flame retardants

Flame retardants are also called flame retardants, fire retardants or fire retardants: they make flammable polymers difficult to Flame retardant functional additives; according to the application method, they are divided into additive flame retardants and reactive flame retardants. According to the composition, additive flame retardants mainly include inorganic flame retardants, halogen flame retardants (organic chlorides and organic bromides), phosphorus flame retardants (red phosphorus, phosphate esters and halogenated flame retardants). Phosphate substitutes, etc.) and nitrogen-based flame retardants, etc.

Due to problems such as high volatility, poor thermal stability, and toxicity of phosphorus halogen flame retardants that have been industrialized earlier, a large number of new organophosphorus flame retardants have been developed at home and abroad in recent years. Agents have been developed and some have been industrialized. In addition, flame retardants using nitrogen and silicon as flame retardant elements have also received widespread attention due to their advantages such as high efficiency, low smoke, low toxicity, and green environmental protection. Therefore, in the molecular design of organophosphorus flame retardants, nitrogen or silicon is introduced into them to obtain phosphorus-nitrogen flame retardant or phosphorus- Silicone flame retardants can often play a synergistic flame retardant role.

Flame retardant materials are able to or Materials that retard combustion but are not easily combustible are widely used in clothing, petroleum, chemical industry, metallurgy, shipbuilding, fire protection, national defense and other fields. Current flame retardant materials mainly include organic and inorganic, halogen and non-halogen. High flame retardant materials are organic flame retardants represented by bromine series, nitrogen series, red phosphorus and compounds, and inorganic ones are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon series and other flame retardant systems. Generally speaking, organic flame retardants have good affinity and are added and used in plastics. Brominated flame retardants have an advantage in organic flame retardant systems. Although they have environmental protection issuesThere are many “criticisms”, but it has been difficult to be replaced by other flame retardant systems.