Mineral additives for setting and/or controlling the rheological properties and gel structure of aqueous liquid phases and the use of such additives
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United States of America Patent
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Sep 2, 1997
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Jan 27, 1995
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Jul 27, 1992
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Abstract
The invention concerns the use of mixed hydroxydes of bivalent and trivalent metals with a three-dimensional spaced-lattice structure of the garnet type to control the thixotropic thickening of aqueous preparations, using swellable clays and/or other swellable layer-silicate compounds of natural and/or synthetic origin as visosity-increasing agents. The preferred garnet-type mixed hydroxydes are catoites of the basic structure Ca.sub.3 Al.sub.2 (OH).sub.12 a minor proportion of whose OH units can be exchanged for acid groups, in particular silicate groups.
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