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Elementis Patents Granular Low-Dusting pigments

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Elementis Patents Granular Low-Dusting pigments
Patent No. U.S. 6,562,120 B2
Elementis UK Ltd. has received a patent for a process to prepare low dusting, free flowing granules of iron oxide or chromium oxide for pigmenting cement or concrete. The process is comprised of mixing iron oxide or chromium oxide and at least one of binder that has some surfactant properties with water to form a mixture. The mixture is extruded through at least one die, thereby compacting the mixture to form extruded granules and drying the extruded granules so that a final water content of the extruded granules is less than about five percent weight.

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