Blend Polyol, Flame Retardant, Polyether Polyol manufacturer / supplier in China, offering B2 Grade Spray Rigid PU Foam Blend Polyol for Building Wall, Tcpp Flame Retardant Tris (2-chloroisopropyl) Phosphate CAS13674-84-5, Spray Rigid PU Foam Blend Polyol Used on Cold Storage; Building Wall and so on.