Synthesis of CaCO3-Based Hyperdispersants and Their Application in Aqueous Coatings

As an essential pigment particle in white water-based coatings, light calcium carbonate (CaCO3) is difficult to disperse systems. The hard-to-disperse particles agglomerate, causing the viscosity of coating rise, which turn affects quality coating. Therefore, order obtain efficient dispersion, hyperdispersant SSS–MPEGA–DMAEA (SMD) has been prepared this study using sodium styrene sulfonate (SSS), polyethylene glycol monomethyl ether acrylate (MPEGA), and dimethylaminoethyl (DMAEA) as monomers through aqueous solution polymerization. Firstly, we utilized central composite design method conduct mathematical modeling monomer ratios so optimize dispersion performance hyperdispersants. Secondly, structural characteristics molecular weight distribution SMD were characterized by 1H NMR spectroscopy GPC. Then, effect on CaCO3 slurry was investigated size TEM measurements. Finally, applied coatings tested surface properties paint film SEM well stability film. results showed that can significantly reduce slurry. waterborne had good storage corrosion resistance, materials owned broad application prospects.