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In this paper, acrylate copolymer latexes containing fluorine and silicon were prepared via semi continuous emulsion copolymerization in the presence of dodecyl-benzenesulfonic acid (DBSA). The effects of the contents of catalyst and monomers on the stability of emulsion were systemically investigated. FTIR, TEM and TGA were used to analyze the properties of the latexes and films. The results indicated that when the amount of DF3 was 20%, DBSA was 0.7%, VTES was 3%, the final product was much more stable. The average particle size of the latexes was about 88 nm with a narrow distribution. The thermal stability of the film was improved and the water absorption rate was declined by the addition of fluorosilicone monomer. [ABSTRACT FROM AUTHOR]