Polymer structured clay pigment and method of preparing the same
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United States of America Patent
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Dec 5, 2000
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N/A
app pub date -
Sep 1, 1998
filing date -
Sep 1, 1998
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Abstract
A method of preparing a polymer structured pigment slurry which comprises providing an anionic, aqueous slurry including a plurality of solid mineral particles, adding a low molecular weight, cationic polymer in an amount of less than about 0.20% by weight to the slurry and then adding a small amount of an inorganic dispersant to the polymer treated pigment slurry. The Malvern median particle size of the mineral particles treated with the polycationic polymer is less than about 20% larger than the Malvern median particle size of the untreated mineral particles.
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