LYT-628 is a reactive flame retardant intermediate mainly used for flame retardant rigid foam. The appearance is a slightly faded viscous liquid. It is mainly used as a reactive flame retardant for the production of grade I and II rigid polyurethane foam. (PUR). The foam material containing LYT-628 has very low smoke generation and flame spread speed. The foam material processed with LYT-628 can obtain excellent physical properties and low cost. It can also be used to produce flame retardant polyurethane gaskets. body materials, coating adhesives and textiles.