Preparation and characterization of Jatropha Curcas oil based alkyd resin suitable for surface coating

Jatropha Curcas oil was extracted from Jatropha seeds by solvent extraction method. Three different alkyd resins have been developed from Jatropha Curcas oil by varying the amount of phthalic and maleic anhydride. The prepared resins are cured by using methyl-ethyl ketone peroxide (MEKP) as initiator and Co-octoate as an accelerator at 120 °C. The characterizations of the resins for structure establishment is carried out using Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopic techniques. The concomitant properties of the cured resins such as acid value, saponification value, viscosity, molecular weight, etc. are also evaluated by standard methods. The cured resins have been tested for chemical resistance, pencil hardness, adhesion, thermal stability and gloss and it can be concluded that the resins may find potential applications in surface coating purposes.

► The new source for development of alkyd resin from renewable feedstock, Jatroph Curcus seeds has been reported.
► Amount of volatile matters found for the resins are quite low.
► Phthalic anhydride based alkyd resin exhibited highest hardness.
► Gratifying chemical resistance, gloss property, adhesion ensure the suitability of the alkyd resins for surface coating.