Kinetic studies were carried out on the reaction between ′4,4-Methylenebis (2-methylcyclohexylamine) and dimeric fatty acid C36 in molten state by using a catalyst of sulpheric acid compared with the same kinetic of reaction without catalyst. The reaction was performed at 150, and 160 ˚C and followed by determining the acid value of the product.The polyamidation reaction was found to be of overall a second order until equilibrium state. Moreover, the catalyst increases speed of the reaction. Polyamidation reaction was automatic whereas the value of free energy was negative and the reaction was endothermic, and this is shown in change of positive enthalpy values.