New Alkyd Resins From Underutilized Indigenous Seed Oils: Synthesis and Characterization

Abstract

The underutilization of sesame (Sesamum indicum L.), sweet almond (Prunus amygdalus), and jatropha (Jatropha curcas) seeds indicates a significant resource waste. Nine different varieties of 25% (short), 40% (medium), and 60% (long) alkyd resins were produced from the cross-section of drying, semi-drying, and non-drying oils. A large amount of conversion occurred, with the extent of the reaction (Pav) decreasing as time progressed and the corresponding increase in alkyds' average degree of polymerization (Dp) showing synthesized alkyds. Surface drying from the set-to-dry and dry-through periods climaxed at 2 h for all the alkyds. Except for alkali, synthesized alkyd resins demonstrated outstanding resistance to service media as surface coatings, but the sesame resins gave excellent film qualities equivalent to those of a commercial and standard oil-based paint.