USB1 Method of making colloidal silica
Disclosed are stable, aqueous colloidal silicas having surface area of greater than 700 m 2 /g and Svalues of from 2050. These colloidal silicas do not require treatment with surface treatment agents such as aluminum to achieve stability. These colloidal silica aquasols can be produced and stored at concentrations of greater than 7 percent by weight SiO 2 solids, and even as high as 15