Study on Preparation and Properties of <i>In Situ</i> Composite of Nano-SiO<sub>2</sub> and Vinyl Acetate-Acrylate Emulsion

Available nanosilica commercially was modified with silane coupling agent A-151, and then emulsion was synthesized with modified SiO 2 , vinyl acetate, methyl methacrylate and butyl acrylate by polymerization reaction. Effects the amount of emulsifier, initiator and organic nanoSiO 2 , etc factors on the performance of emulsion polymerization and latex film were investigated. The best test results of composite emulsion of SiO 2 and vinyl acetate-acrylate were obtained by theoretical research and experimental operation: modified nanoSiO 2 content of 3%, the content of 3% emulsifier OP, content of 0.5% potassium persulfate initiator.