Abstract: In this paper, the degradation product of the waste polyester (PET) was used to prepare the curing agent of crosslink resin. The ratio of the degradation product and monoethanolamine, the catalyst content and the reaction temperature were studied to get the optimized reaction conditions to prepare the curing agent. Also, the structure of the curing agent was characterized by using the infrared Spectroscopy (FT-IR), and the thermal stability was illustrated by using thermal gravity analysis (TGA). It was shown that the proper ratio of the degradation product to monoethanolamine should be 1:1.2,and to catalyst is 0.01:1, the reaction temperature should be controlled under 150℃.

Key words: waste poltester, propaneteiol, epoxy resin, curing agent