Dimer acids which are also known as dimerized fatty acids belong to the group of dicarboxylic acids. Dimer acids are viscous fluids that are transparent and non-toxic in nature. Dimer acids are manufactured by dimerizing unsaturated fatty acids that are obtained from oleic acid, canola oil, tallow, cottonseed, tall oil and rapeseed among others. Dimer acids are widely used to synthesize polyamide resins and hot melt adhesives. Dimer acid-based polyamide resins have varied properties which makes them either reactive or non-reactive in nature. Reactive polyamides are primarily used as curing agents for epoxy resins that are generally used in the manufacturing of adhesives and surface coatings. On the other hand, the non reactive polyamides are predominantly used in the manufacturing of printing inks and hot-melt adhesives. Dimer acid-based polyamide resins exhibit physical properties such as heat resistance, cold resistance, film flexibility, fast curing, oil resistance, excellent adhesion and good compatibility among others. Dimer acid-based polyamide resins are widely used as decorative coatings, fabrics, interlining, shoe stretch, fold plastic and Baotou glue.