Abstract:A series of tung oleic acid modified emulsion containing epoxy group polyacrylate emulsion (modified polyacrylate emulsion for short) were prepared by semi-continuous emulsion polymerization with butyl acrylate (BA), methyl methacrylate (MMA), hydroxyethyl acrylate (HEA) as the main monomer ,and tung oil acid and shrinkage glyceride methacrylate (GMA) as the functional monomer.The structure of the films was characterized by FTIR. The properties of the films were analyzed by mechanical properties, acid and alkali resistance test. The results show that when the content(based on the total mass of MMA, BA, HEA and GMA) of tung oleic acid is 4%, with the increase of GMA content(that is, the mass of GMA as a percentage of the total acrylic monomer mass, the same below), the hardness of the pencil increases, the water resistance, acid and alkali resistance increase, the tensile strength increases, the thermal stability increases, and the adhesion of the film increases. When the mass ratio of GMA is 12% in the total monomer mass, the hardness of the film pencil is 4H. The film coated on tinplate has no change in 5% hydrochloric acid solution for 144 h, no change in 5% sodium hydroxide solution for 72 h. The water absorption rate of 24h is 3.31% and the adhesion level is 0.