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Pickering-Stabilized Latexes with High Silica Incorporation and Improved Salt Stability



Some of the unsolved challenges in the synthesis and performance of Pickering-stabilized polymer dispersions (high solid content, coagulum-free, high incorporation of silica, and salt stability) are overcome by means of a miniemulsion process using surface-modified silica as a sole stabilizer. Coagulum-free, 50 wt% solid-content latexes with an incorporation of silica exceeding 90 wt% and with better salt tolerance than latexes stabilized with conventional emulsifiers (SLS, PVOH) are obtained by varying the type and concentration of silica.