Study on the Effect of Catalyst PC-41 on the Foaming of Recycled Polyurethane

Abstract

The waste polyurethane was degraded by diethylene glycol (DEG) and ethanolamine (ETA) to obtain the oligomer polyol. It was used to prepare the regenerated polyurethane rigid foam by a "one-step method".In this study, the effects of 1,3,5-Tris[3-(dimethylamino)propyl] hexahydro-1,3, 5-triazine(PC-41), a kind of trimerization catalyst, on foaming process of waste polyurethane were studied, and the rigid polyurethane foam was prepared by "one-step" foaming method. According to analyzing the effects of PC-41 on foaming time, apparent density, cellular structure and compressive property of the foamed plastics, the results showed that when the addition of PC-41 is 0.5%, the properties of the products were relatively the best, and the environment-friendly polyurethane foam materials with high performance could be prepared.