This work is a follow-up of the study of hydrophilization of unsaturated polyester resin (UPER) with sodium hydroxide. Different amounts of water were added to the hydrophilized unsaturated polyester resin (HUPER) so obtained and their effects on curing kinetics were studied. The tensile strength and energy to break these compositions are presented depending on the amount of the specified components. A possibility for using different fillers, coal ash in particular, and their mixing with HUPER was sought. The effect of each of the components on the curing kinetics of the respective compositions, and the effect of all components when consecutively mixed in the multicomponent composition was examined. We sought an opportunity for the application of some of the compositions as substituents of dental cast models.
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