s A polyamideimide (PAI) coating was synthesized from the reaction of rosin maleic anhydride (RMA) adduct with di isocyanates,and modified by means of copolymerization with caprolactam.

• 用松香和马来酸酐加成物-马来海松酸酐与芳香族二异氰酸酯反应制备了聚酰胺亚胺（PAI）烘漆，进一步用己内酰胺共聚改性。