Two-stage process for delaminating kaolin
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United States of America Patent
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Apr 7, 1998
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N/A
app pub date -
May 14, 1996
filing date -
May 14, 1996
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Expired
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Abstract
A method for producing a delaminated kaolin clay having a G.E. brightness of at least 85, a solids content of at least 67 percent by weight, and a viscosity below 500 cps is disclosed. An aqueous slurry of kaolin clay is subjected to agitation in the presence of a hard grinding media. The slurry is then subjected to agitation in the presence of a soft grinding media. The result is that at least 80 percent of the delaminated kaolin has an equivalent spherical diameter of less than or equal to 2 microns.
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