BACKGROUND:　Silicon-containing　fluoroacrylate　copolymers　are　potential　materials　for　use　in　the　protection　of　ancient　stone　buildings.　In　the　work　reported　in　this　paper,　a　new　core-shell　silicon-containing　fluoroacrylate　latex　was　prepared　through　grafting　of　a　fluoroacrylate　copolymer　latex　with　polysiloxane.　RESULTS:　The　core-shell　silicon-containing　fluoroacrylate　latex　was　successfully　synthesized　by　seed　emulsion　polymerization　and　octamethylcyclotetrasiloxane　(D(4))　ring-opening　polymerization　in　the　presence　of　a　mixed　emulsifier　consisting　of　a　non-ionic　emulsifier　and　a　novel　fluorine-containing　anionic　emulsifier　sodium　perfluoro-octane　sulfonate.　Transmission　electron　microscopy,　X-ray　photoelectron　spectroscopy,　static　contact　angle　measurements　and　scanning　electron　microscopy-energy　dispersive　X-ray　analysis　showed　that　when　the　D(4)　content　was　controlled　at　2.84-4.36　wt%,　the　silicon-containing　fluoroacrylate　latex　presented　a　uniform　sphere　core-shell　structure　and　had　strong　hydrophobic　and　oleophobic　characters　due　to　the　association　of　both　fluorine　and　silicon　atoms　on　the　latex　film　surface.　The　film　cross-section　exhibited　uniform　and　dense　microstructure　without　any　phase　segregation.　Additionally,　thermogravimetric　analysis　and　tensile　test　results　indicated　that　all　the　silicon-containing　fluoroacrylate　copolymers　displayed　better　thermal　stability　and　higher　flexibility.　CONCLUSION:　The　synthetic　core-shell　silicon-containing　fluoroacrylate　latex　showed　excellent　surface　properties,　thermal　stability　and　flexibility,　and　has　encouraging　prospects　in　application　as　a　protective　coating.　(C)　2009　Society　of　Chemical　Industry