Synthesis and Physico-chemical Characterization of Alkyd Resin from Lumbang Derived Oil

Abstract

Oil was successfully extracted from Lumbang kernels in which it was characterized for its properties. FT-IR spectrum showed pertinent peaks corresponding the presence of functional groups such as ester and sp® C-H stretching. The alkyd resin from Lumbang-derived oil was also successfully synthesized by first undergoing alcoholysis reaction of Lumbang oil and glycerol followed by esterification reaction in the presence of phthalic anhydride. The properties of synthesized alkyd resin were shown in the FT-IR and GC-MS analyses. FT-IR showed pertinent peaks corresponding to the presence of O-H C-O, C=0, C-H and C=C stretching frequencies. GC-MS data confirmed the presence of saturated and unsaturated fatty acid in the structure of the Lumbang oil and alkyd resin. Alkyd resin was also synthesized in which its oil was first purified by deep eutectic solvent (DES, 1:2:1 choline chloride:ethylene glycol:glycerol). The synthesized alkyd resins were then characterized based on its adhesive property and chemical resistance. It was found out that presence of alkyd resin with paint leads to longer drying time. In terms of chemical resistance, paint is not chemically resistant to basic and acidic media. Moreover, with the presence of the alkyd resin, paint quality showed to be improved in terms of its adhesive property. Being an additive to paint, results showed that addition of even a small amount of alkyd resin would enhance the quality of the coating. Thus, with all the ratio of alkyd resin to paint that was tested, a ratio of one alkyd resin to five paint possessed the least drying time, most chemical resistant to acidic and basic medium, and have a good adhesive property.