Synthesis of a Maleic Polymerizable Emulsifier and Its Application in Mini-emulsion Polymerization

A polymerizable emulsifier sodium maleic hemihexadecylester propylsulfonate was synthesized in three steps.The synthetic conditions were optimized with design.Results show that the mass fraction of catalyst is 1%,reaction time is 3.0 h,reaction temperature is 90 ℃,and the molar ratio of maleic(anhydride) and 1-hecadecanol is 1.1∶1.The polymerizable emulsifier is applied in the Styrene-Butyl Acrylate mini-(emulsion) polymerization system.Compared with conventional emulsion polymerization,high rate of conversion(at 65 ℃) is observed,meanwhile,electrolytic stability and water resistance of the synthesized emulsion are markedly improved.