Compositions and methods for making a coarse platey, high brightness kaolin product
AssigneeImerys Kaolin, Inc.
InventorsJohn A. Manasso, Bomi M. Bilimoria, Leslie A. McLain, Milton Constantin
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Abstract
Coarse platey, high brightness kaolin products and methods for making the same, including combining a coarse kaolin fraction and a fine kaolin fraction, where each coarse or fine kaolin fraction may be produced by processing one or more crude kaolin samples through different stages of the methods of the present invention, by blending of one or more crude kaolin samples so processed, or as a by-product of a coarse or fine kaolin product.
Claims20
A coarse platey, high brightness kaolin product comprising kaolin particles, wherein at least 40% of the kaolin particles in the product have an equivalent spherical diameter of greater than two microns, and wherein the kaolin product has a GE brightness of 88 or greater and a minimum high shear rheology of 800 rpm at 18 dynes and 68% solids using A-bob on a Hercules viscometer.
A coarse platey, high brightness kaolin product comprising kaolin particles, wherein 45-55% of the kaolin particles in the product have an equivalent spherical diameter of greater than two microns, and wherein the kaolin product has a GE brightness of 89-91.
A coarse platey, high brightness kaolin product comprising kaolin particles, wherein 45-55% of the kaolin particles in the product have an equivalent spherical diameter of greater than two microns, and wherein the kaolin product has a GE brightness of 89-91 and a minimum high shear rheology of 800 rpm at 18 dynes and 68% solids using A-bob on a Hercules viscometer.
A method for making a coarse platey, high brightness kaolin product comprising kaolin particles having a GE brightness of 88 or greater and wherein at least 40% of the kaolin particles in the end product have an equivalent spherical diameter of greater than 2 microns comprising combining a coarse kaolin fraction in which the average equivalent spherical diameter of the kaolin particles is greater than two microns, with a fine kaolin fraction in which the average equivalent spherical diameter of the kaolin particles is less than two micron.
Dependencies are inferred from the claim text.