Method for improving the rheology of calcined kaolin clay products
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United States of America Patent
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Nov 16, 1993
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app pub date -
Oct 15, 1992
filing date -
Jul 3, 1990
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Abstract
A method for preparing a calcined kaolin clay powder having good high shear rheology in high solids aqueous slurries. A kaolin clay powder of fine particle size is calcined at a sufficient temperature and for a sufficient period to destroy the crystallinity thereof; and the calcined product is dry milled in a media mill, using a work input of from 100 to 160 hp-hr/ton of dry clay.
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