The present study shows the synthesis of polyamide 6/6 (nylon 6/6) via interfacial polycondensation of hexamethylenediamine and adipoyl chloride, at room temperature, with the simultaneous impregnation of carbon fibers, using the reaction injection pultrusion (RIP) process. The polyamide 6/6 obtained was characterized by infrared spectroscopy, differential scanning calorimetry, and viscosity measurements. The impregnation of the carbon fibers was evaluated by scanning electron microscopy assisted by electron dispersive spectroscopy showing good carbon fiber/polymer matrix interface. These results show that the combination of the synthesis of polyamide 6/6, at room temperature, with simultaneous impregnation of carbon fiber amplifies the application of this structural thermoplastic composite with different arrangements of the reinforcement.