Application of this toolkit was illustrated by investigating the influence of our patented masterbatch, Paxymer® on the flame resistance properties HFFR formulations containing particularly PFR additives. Paxymer is a masterbatch and is composed of acrylic functional polymers and is expected to function as a good synergist with PFR due to the presence of oxygen atom. The presence of functional groups in the polymers should also permit to perform Paxymer®in a multiple mechanistic way together with PFR, namely activating both in the gas phase by encouraging the formation of more phosphorus radicals in the gas phase and in the condensed phase by generating crosslinks and phosphoramidate compounds, according to the reaction schemes reported in the patent publications.