Researchers performed an experiment to synthesize castor oil based biothiols with good stability for use in photoinitiator free UV coatings. Castor oil based biothiols were synthesized via esterification reaction between castor oil (CO) and 3-mercaptopropionic acid (MPA).
Characterization studies showed that the targeted oligomer was successfully prepared. Finally, the UV-curable films of CO-SH also showed good physical and chemical properties.