Kinetic studies were carried out on the reaction between C36 dimer acids and diethylene-triamine (DETA) and triethylenetetramine (TETA) in melt phase. The reactions were performed at temperatures in the range of 145-degrees to 190-degrees-C and followed by determination of the acid and amine values of the intermittent products. The polyamidation reactions of C36 dimer acids and DETA and TETA followed overall second-order kinetics and had activation energies of 14.4 kcal/g mol and 12.3 kcal/g mol, respectively.