Pigment products in an agglomerated form and use thereof in bulk shipments
AssigneeEngelhard Corporation
InventorsRussell R. Crumbley, James T. Palmer, Raymond G. Downey, Mitchell J. Willis, Michael Pavol
Life of this patent
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Abstract
Pigments in a form for bulk shipment are prepared by kneading dry pigment particles with a limited amount of water or an aqueous slurry of pigment particles to form dough-like, dust-free agglomerates which are shipped without subsequent drying and/or compaction.
Claims21
Kneaded dough-like agglomerates comprising at least one powdered hydrophilic pigment, said agglomerates containing from 1 to 30% by weight of water, having an average size in excess of 325 mesh (U.S. Standard) and being substantially free from dust, said agglomerates being sufficiently compact to resist breakdown to dust during shipment but being capable of being dispersed in water when agitated therein using conventional pigment makedown equipment.
A method for producing a pigment composition adapted for bulk shipment and subsequent unloading in a mechanical conveyor and makedown in water which comprises kneading a major weight of particles of dry pigment with water or an aqueous slurry of pigment particles using an energy input not to exceed 5 hp. hr./ton, using only sufficient water to bind the mixture of particles into coherent dustless agglomerates.
A method for producing a clay composition adapted for bulk shipment and subsequent unloading in a mechanical conveyor and makedown in water which comprises kneading a major weight of particles of dry calcined kaolin pigment with an aqueous slurry of particles of hydrous kaolin pigment by spray application of said aqueous slurry using only sufficient water to bind the mixture of particles into coherent agglomerates and an energy input not to exceed 5 hp. hr./ton.
Dependencies are inferred from the claim text.