What are the developments in the application of PP flame retardants?
Halogen-antimony system, namely gas phase flame retardant mechanism. Commonly used halogen flame retardants are decabromodiphenyl ether, hexabromocyclododecane, octabromo ether, tetrabromobisphenol A, etc., plus flame retardant synergistic agent antimony trioxide, with a small amount of addition, good flame retardant effect. PP is treated with a bromoalkyl-containing phosphate ester. This kind of flame retardant has P-Br synergistic effect, so that the flame retardant effect is significant, but also can improve the rheology and processing performance of PP, the physical and mechanical properties of PP is also small. In recent years, in PP flame retardant technology, the intumescent flame retardant pioneered by Camino, a professor at the University of Turin, Italy, has played a huge role.
