Abstract: After esterization,isomerization,polymerization and amidation of cottonseed oil and its waste materials,the curing agents of automobile coatings were synthesized.The polymerization principle was discussed,and the application research work was carried out.It was shown that polyamide from cottonseed oil was suitable as curing agent for automobile coatings,and had been found wide application.

Key words: cottonseed oil, curing agent, polyamide