Obtaining salts of resin acids from Cuban pine by metathesis reactions

Abstract

The resin acids obtained from the Cuban pine rosin are the starting material for the development and application of metathesis reactions. These reactions allow the obtaining of salts with high added value which could be used in the development of biomaterials for dental use. The objective of this work was to obtain calcium, magnesium and zinc resinates from the resin acid obtained from the Cuban pine resin by metathesis reaction for possible use in the development of biomaterials. The products obtained were evaluated by elemental analysis, X-ray powder diffraction, infrared spectroscopy, scanning electron microscopy associated with electron dispersion spectroscopy, nuclear magnetic resonance and biological tests (antibacterial activity). The results showed the formation of the different resinates, observing the presence of cations in the salts obtained. The disappearance of the signal corresponding to the hydrogen of the carboxyl group was verified by nuclear magnetic resonance analysis due to the reaction between the resinic acid and the different metals studied. The biological analyzes showed that the best results are achieved with zinc resinate.