Abstract：Siloxane-modified polyacrylate miniemulsion was synthesized via miniemulsion polymerization using methyltrimethoxysilane (MTMS) and minor 3-Methacryloxypropyltrimethoxysilane (MEMO) as the functional siloxane monomers, methyl methacrylate (MMA) and n-butyl acrylate (BA) as acrylate monomers. The process of hydrolysis-co-emulsification and the effects of organosilicone content, dosage of initiator, emulsifier ratio, stabilizer type and dosage, as well as the mass ratio of momomers to water on the miniemulsion stability, particle size and distribution were investigated. The results indicated that the stable siloxane-modified polyacrylate miniemulsion was successfully synthesized with low agglomeration rate (0.81 %) under the conditions of total mass fraction of organic silicon monomer 30% , initiator mass fraction of 1%, SDS and OP-10 mass ratio of 3:2 and the mass ratio of the monomer to water of 7:13. The particle size could be as small as 76 nm in diameter, with particle size distribution index (PDI) as low as 0.12, and the miniemulsion remained stable even after 30 days.
