Preparation of fluorine modified acrylate emulsion by cationic emulsifier and nonionic emulsifier

In this article,the acrylate copolymer emulsion was synthesized by cationic and nonionic emulsifier system via semi-continuous method,with methyl methacrylate(MMA),butyl acrylate(BA),dodecafluoroheptyl methacrylate(FMA)etc. as monomers. The influence of ratio for different emulsifier on the polymerization stability and calcium ion stability was investigated in the emulsion. The effects of fluorine monomer content on water-resistance of the emulsion films were studied through experiment of the water absorption and contact angle to water. The shape of emulsion particles was observed with transmission electron microscopy(TEM). The results showed that steady acrylate copolymer emulsion with fluorine was prepared,while mass ratio of nonionic and cationic emulsifier was 2.5∶1 in system of composite emulsifier,the modified emulsion films by fluorine monomer have higher contact angle to water,lower surface energy and water absorption.