Firebrake® ZB is a unique form of zinc borate with multifunctional fire retardant applications in plastic and rubber compounds. Since Firebrake® ZB releases its water of hydration at temperatures exceeding 290°C (554°F), it can be used in systems requiring high processing temperatures. Firebrake® ZB has a refractive index similar to that of most polymer systems, which results in the retention of considerable translucency and allows the use of low pigment loading. It can be fed to extruders, calenders, or injection molding equipment in much the same way as other solid polymer additives.
Firebrake® ZB-Fine and Firebrake® ZB-XF are recommended for applications where maximum fire test performance is needed, and physical properties such as film forming and adhesion are critical. The XF grade has no particles greater than 12 microns, as determined by Laser Diffraction technique, and therefore is suitable for more critical applications.