| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide improved methods of preparing stable dispersions of fumed metal oxides with high solids loadings and at relatively high pH. <P>SOLUTION: The invention provides a method of preparing a dispersion of a fumed metal oxide in a liquid carrier comprising the following sequential steps: (a) providing a liquid carrier at a pH that effects dissolution of the metal oxide at a rate the same as or greater than the metal oxide dissolution rate in water at a pH of about 8, (b) mixing with the liquid carrier, in any order, one or more aliquots of both a fumed metal oxide and a metal ion source to form a dispersion, such that the dispersion does not coagulate, and (c) optionally adjusting the pH of the dispersion to the pH of the liquid carrier in step (a). <P>COPYRIGHT: (C)2013,JPO&INPIT |
