Study on rheological behaviour of self-crosslinkable acrylate emulsion with nanosilica sol by blending

A study on blending self-crosslinkable acrylate emulsion with nanosilica sol has been made to improve the paint film properties. Fourier transform infrared, differential scanning calorimetry and SEM are employed to characterise the film prepared by blending polyacrylic emulsion with nanosilica sol. The results of the rheological property show that the blended emulsions containing different silica sol contents are pseudoplastic fluid, and the apparent viscosity, consistency factor and zero shear viscosity increase in accordance with the content of the silica sol, but the emulsion flow index decreases. After being laid for 2 days, the apparent viscosity, consistency coefficient and zero shear viscosity of the emulsion increase, but the flow index is decreased in comparison with the emulsion with the same amount of silica sol without laying.