Zeolites as Synergistic Agents in Intumescent Systems

FIGURE 6.4 LOI versus zeolite level in a technical ethylenic terpolymer (ethylene-butylacrylate-maleic anhydride, Lotader P3200 from Elf-Atochem). The additive level is kept constant at 30 wt%, and the synergistic effect exhibits a maximum at 1.5 wt% 4A 

Building Units Formula Structure Type SifAl (at/at) Aprature Size (nm) 

FIGURE 6.5 LOI values versus Y, mordenite, and ZSM-5 zeolite level of formulations LRAM3.5-APP/PER-zeolites (additive level remaining constant at 30 wt%). 

FIGURE 6.7 RHR versus time of the systems LRAM3.5, LRAM3.5-APP/PER, and LRAM3.5-APP/PER-4A (external heat flux = 50 kW/m ). (From Ref. 37, copyright 1996, Elsevier, with permission.) 

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