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US 4,227,935 AGranted
High dry hide TiO.sub.2 slurries
AssigneeAmerican Cyanamid Company
InventorsDavid W. Blake, Alberto W. Delgado, Gerard M. Sheehan
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Abstract
High dry hide titanium dioxide pigment slurries are prepared from in-process material which is treated with low amounts of aluminum oxide.
Claims8
In an aqueous titanium dioxide pigment slurry having high hiding power, a solids content of about 55 to 70 percent by weight, and an effective amount of a dispersing agent, the improvement comprising using undried, unmilled hydroclassified fines as the source of the titanium dioxide wherein said fines pass through a 325 mesh screen and are coated with about 0.3 to 3 percent by weight of hydrous aluminum oxide.
Dependencies are inferred from the claim text.