Process for the production of aqueous dispersions of pigmentary titanium dioxide
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United States of America Patent
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May 15, 1984
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N/A
app pub date -
Mar 25, 1982
filing date -
Apr 10, 1981
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Expired
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Abstract
Stable high concentration aqueous slurries of pigmentary metal oxide particles having a hydrous oxide surface-treatment comprising alumina, for example alumina surface-treated pigmentary titanium dioxide, may be formed by the use of a specified combination of anionic and amine dispersants and a milling in the presence of grinding elements, for example in a sand mill, to develop suitable viscosity and gloss characteristics. The slurries may show thixotropic properties and are suitable for incorporation in vinyl silk aqueous emulsion paints.
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