Effect of Polymerization Techniques on Properties of Core-Shell Acrylate Emulsion

Core-shell acrylate emulsion was prepared from butyl acrylate(BA),methyl methacrylate(MMA) and acrylate acid (AA) by batch process,semi-continual process and pre-emulsification semi-continual seed emulsion polymerization when the mass ratio of butyl acrylate(BA) and methyl methacrylate(MMA) is 7∶3 in core and 3∶7 in shell respectively,the mass ratio of the monomer in core and shell is 1∶1,and the mass of acrylate acid (AA) is 4%,and the reaction temperature is at 70 ℃ in core and 80 ℃ in shell. Effect of polymerization techniques on the properties of emulsion and coating was studied. The particles of emulsions characterized by laser nano particle size analyzer and transmission electron microscopy(TEM). The results show that the core-shell acrylate emulsions with uniform particle size distribution,good stability and excellent mechanical property of the coating can be prepared by pre-emulsification semi-continual process.