Synthesis and characteristics of water-based, rosin-modified, polymerized oil based on dehydrated castor oil acid and zinc resinate

Abstract

In this study, we synthesized a water-based, rosin-modified, polymerized oil (WRPO) via an addition and polymerization reaction of dehydrated castor oil (DCO), rosin acid (RA), zinc resinate (ZR) and dehydrated castor oil acid (DCOA). Addition and polymerization reactions at 240 °C, followed by neutralization with ammonia, dissolution into butyl alcohol and subsequent dilution with water, were performed at varying DCOA contents of 10%, 20%, 30%, 35% and 40%. WRPO was mixed with butoxymethylmelamine (BMM), a curing agent, at a weight ratio of 80 : 20, and then cured for 2 hours at 130 °C. Structure and thermal characterizations of the prepared WRPOs were investigated via FTIR spectroscopy, ¹H NMR spectroscopy and TGA. Characterization results indicated that when the contents of DCOA and ZR were 35% and 5%, respectively, the obtained WRPO exhibited fine water-dispersible stability and excellent physicochemical properties.