TREATED INORGANIC PIGMENTS HAVING IMPROVED BULK FLOW
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United States of America Patent
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app pub date -
Apr 24, 2012
filing date -
Apr 28, 2011
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Abstract
The disclosure provides a treated inorganic pigment, typically a titanium dioxide pigment, comprising an inorganic pigment having a surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, based on the total weight of the treated pigment; wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11. The treated inorganic pigments have better flow characteristics, and generally fewer lumps.
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