Producing Jatropha oil-based polyol via epoxidation and ring opening

•Epoxidized Jatropha oil was produced by solvent-free epoxidation process.•Epoxidation reaction utilizes hydrogen peroxide 50% and completed in 5h.•Jatropha-based polyol have hydroxyl number of 171–179mg/KOH with functionality 5.1–5.3.•Low viscosity Jatropha-based polyol of 0.98Pa.s. allows easier molding process.•Jatropha-based polyol is renewable and non-edible. A low viscosity polyol has been functionalized from crude Jatropha oil via epoxidation and subsequent ring-opening. Starting with the crude Jatropha oil, the double bonds are functionalized by introducing epoxy groups and ring-opened to produce hydroxyl groups. The experiment employs more concentrated 50% hydrogen peroxide and effectively produce solvent-free epodixidized Jatropha oil within shorter reaction time of 5h with maximum oxirane oxygen content of 4.30% and viscosity of 0.57–0.60Pa.s. The epoxidized Jatropha oil is then transform into Jatropha-based polyol with hydroxyl number of 171–179mg KOH/g, low viscosity of 0.92–0.98Pa.s. and functionality of 5.1–5.3. The epoxidation and ring-opening process are monitored by viscometer and FTIR. The produced polyol permit more time for molding and additives addition during polyurethane due to its low viscosity.