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Studies on the preparation of Parinari polyandra benth seed oil alkyd resins



Parinari polyandra Benth seed oil was utilized in the preparation of four sets of alkyd resin (35%, 50%, 60%, and 75% oil formulations) using a two-stage alcoholysis-polyesterification method. The rate of polyesterification was depended on the amount of oil used during synthesis. The properties of the alkyds (drying times, film characteristics, water and acid resistances, and solubility) were evaluated using relevant standards. Inclusion of cobalt naphthenate drier in the alkyds and their exposure to outdoor temperature improved the drying properties. White gloss paints formulated from the alkyds, considering a pigment-volume concentration of 20.67% in the gloss paint formulation compare well with commercial standard. FTIR and 1H-NMR analysis confirm the alkyd (glycerol-phthalate) structure. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013