Extended BaCO.sub.3 for brick scum prevention
AssigneeThe Sherwin-Williams Company
InventorsRobert H. Kindrick, Benjamin C. Harrison
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Abstract
This invention relates to an improved barium carbonate prepared by precipitating barium carbonate on an inert core to effectively increase its sulfate scavenging utility by providing enhanced reactivity and dispersibility. This invention is especially useful in the prevention of efflorescence and scumming of bricks or ceramic tile caused by the migration of soluble sulfates during their manufacture.
Claims7
A barium carbonate product useful as a chemical scavenger which consists essentially of an inert core and an effective amount of a thin crystalline layer of above about 10% by weight of barium carbonate precipitated in situ upon said core.
A process for producing an extended barium carbonate product which comprises suspending a finely-divided inert material in water, generating barium carbonate in the presence of said suspended inert material and precipitating above about 10% by weight barium carbonate upon the surface of said suspended inert material.
Dependencies are inferred from the claim text.