Improving Jatropha curcas Linnaeus oil alkyd drying properties

The Jatropha curcas Linnaeus (JCL) oil was extracted, refined and modified through epoxidation, hydroxylation and dehydration steps in order to increase the degree of unsaturation in the oil alkyl chain. The modified oil was subsequently used for alkyd resin preparation (50% oil formulation) using a two-stage alcoholysis-polyesterification method. Drying performances of white gloss paints formulated from the desaturated oil alkyd, considering a pigment-volume concentration of 20.67% gave improved results. Blending of the improved 50% JCL oil alkyd with acrylic further enhanced the drying properties and compare well with commercial standards. White gloss paint formulated from the improved JCL alkyd–acrylic blends (1:3) dried hard within 2 h at an outdoor temperature of 37 °C ± 2.

Figure optionsDownload as PowerPoint slideHighlights
► JCL oil was extracted, refined and modified by epoxidation, hydroxylation and dehydration steps.
► Modified JCL oil was used to prepare medium oil alkyd and evaluated.
► Desaturation of JCL oil slightly improved the initial drying times of the resultant alkyds.
► Utilization of acrylic blending agent improved the drying properties Jatropha oil resins.
► Desaturation of JCL oil and blending at ratio 50:50 with acrylic gave the fastest drying effects.