The flame retardant characteristics of phosphofite compounds are as follows:
Excellent flame retardant performance: Phosphorus compounds have a relatively high phosphorus content. When used as flame retardants, they can endow polymers with excellent flame retardant performance. During combustion, the release of smoke and toxic gases is low, and the impact on the comprehensive performance of polymers is relatively small.
Good thermal stability and chemical resistance: DOPO compounds have good thermal stability and chemical resistance. For example, as an intermediate of DOPO flame retardants, its chemical stability is generally better than that of chain-like organophosphorus ester flame retardants, and the flame retardant effect is long-lasting and not easy to migrate.
Good compatibility with polymer matrices: Phosphofite compounds are not volatile or hydrolyzed, and have good compatibility with polymer matrices. They can be used for flame retardancy in various polymer materials, such as semiconductor packaging materials, circuit boards and thermoplastic materials, epoxy resins, polyester materials, etc.
High reactivity: Phosphoric acid compounds contain active P-H bonds, enabling them to participate in various chemical reactions, such as addition reactions with double bonds and ring-opening reactions with epoxy groups, and can be used as both additive and reactive flame retardants.
