Abstract
Natural bases and alternative easy degradability have been employed in the petrochemical industry for polymer formulation, paints, foams, detergents, lubricating oils and especially, due to its viscous characteristics. The great advantage of renewable raw materials to replace fossil products prompted the study of viscosity of andiroba oil ( Carapa guianensis Aubl.) after chemical modifications. The oil was characterized by the acid number, kinematic viscosity, saponification value, moisture content, iodine index, peroxide index, oxidative stability, hydroxyl number and density, and then subjected to chemical modifications (alkaline ethyl transesterification and hydroxylation in situ). The production of andiroba polyols was optimized using factorial design, based on the reduction in the degree of unsaturation, monitored mainly by the increase in kinematic viscosity. The study of the conversion process was effective for the synthesis of polyols in different viscosity ranges, indicating the best conditions for obtaining polyols having flow characteristics compatible with commercial lubricants. DOI: 10.5935/1984-6835.20160067
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