Over the past few decades, the performance of water-based architectural paint has consistently improved. However, latex polymer dispersions used in water-based coatings are typically limited to around 50 wt% polymer solids. This is because most polymer dispersions used for architectural coatings have a fairly narrow single particle size distribution (monodisperse), and when the monodisperse polymer particles approach their close packing limit, there is a sharp increase in viscosity at solids contents much beyond 50 % [1-3]. On the other hand, polymer dispersions with a bimodal particle size distribution can achieve a significantly higher solids content due to the ...