Used frying oil (UFO) obtained from industrial food preparation was evaluated as raw material to produce biobased resins suitable to be used as binder in printing inks (offset or typographic printers). The polymerization of UFO was compared with selected refined oils described in the literature to produce printing inks. After 3 h, the UFO-polymer viscosity was up to 80% higher than using refined soybean oil in similar conditions. This behavior is possibly associated to a smaller induction time when using UFO. The polymerization increased the acid value in all feedstock used because of the formation of carboxylic acids. Using metal complex of the type M(carboxylate)2 (M = Ni2+, Fe2+, Cu2+, Co2+ and Sn2+) as catalyst precursor for UFO polymerization, the viscosity increased up to 75% when compared with non-catalyzed reactions.
thermal polymerization; printing ink; used frying oils
