High Brightness and Low Abrasion Calcined Kaolin
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Dec 18, 2006
filing date -
Dec 21, 2005
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Abandoned
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Abstract
Disclosed herein are calcined kaolins, having a GE brightness of at least about 89 and an Einlehner Abrasion value of not more than about 4.0 mg when measured at 43.5 krev and a solids content of 10%. Further disclosed herein are calcined kaolins, having a Hunter “a” value of less than 0.1 and an Einlehner Abrasion value of not more than about 4.0 mg when measured at 43.5 krev and a solids content of 10%. In addition, disclosed herein are methods of making the calcined kaolins and products comprising the calcined kaolins.
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