Title:
METHOD OF PREPARING A FUMED METAL OXIDE DISPERTION
Document Type and Number:
WIPO Patent Application WO2002040399
Kind Code:
A3
Abstract:
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 dispertion does not coagulate, and (c) optionally adjusting the pH of the dispersion to the pH of the liquid carrier in step (a). The method allows for the preparation of the dispersion to be done with a high solids loading and at a high pH. Furthermore, the dispersion can have a shelf-life of at least about 1 hour or more at 25 DEG C.
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Inventors:
BROWN STEVEN E
Application Number:
PCT/US2001/044250
Publication Date:
August 01, 2002
Filing Date:
November 14, 2001
Export Citation:
Assignee:
CABOT CORP (US)
International Classes:
B01J13/00; C01B13/14; C01B33/14; C01B33/141; C09C1/00; C09C1/28; C09C1/40; (IPC1-7): C01B33/00; C01B33/141; C01B33/12
Foreign References:
| US2984629A | 1961-05-16 | |||
| US5246624A | 1993-09-21 | |||
| US5116535A | 1992-05-26 | |||
| GB713211A | 1954-08-04 | |||
| GB1326574A | 1973-08-15 |
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