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 degrees C +/- 2. (C) 2011 Elsevier B.V. All rights reserved.