Why silica sol can improve the performance of latex paint？

Silica sol is essentially an ultrafine dispersion of polysilicic acid in water Generally,polysilicate forms spherical colloidal particles in water, and its straight channel diameter is 1-100 nanometers, which is much smaller than that of synthetic resin emulsion. It is highlyspreadable to pigments and permeable to substrates. Sometimes, the main purpose of adding part of silica sol to latex paint is to improve the performance of the paint film

Silica sol is essentially an ultrafine dispersion of polysilicic acid in water. Generally,

polysilicate forms spherical colloidal particles in water, and its straight channel diamet is 1 --100 nanometers, which is much smaller than that of synthetic resin emulsion. It is

highlyspreadable to pigments and permeable to substrates. Sometimes, the main

purpose of adding part of silica sol to latex paint is to improve the performance of the paint film

After adding silica sol, the obtained latex film is denser and has better air permeability. Can improve coating film hardness, water resistance and stain resistance. The silica sol undergoes a coordination reaction with the basic compound precipitated in the concretematrix to form a coordination compound

But it should be noted that not all latex paints can add silica sol. After adding the silica

sol, it is necessary to observe the storage stability of the base emulsion used.The amount of silica sol added should be cautious. If the amount is too much, the viscosity will increase, which will easily cause the flocculation and coagulation of the paint,   and eventually cause the paint to be scrapped.