Preparation of nondusting free-flowing pigment concentrates
AssigneeGoldschmidt GmbH
InventorsWerner Schafer, Manfred Scheiba, Stefan Stadtmuller, Markus Weimann, Karlheinz Rumpler, Ulrich Walter
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Abstract
The invention relates to a process for preparing nondusting free-flowing pigment concentrates with removal of the water from pigment suspensions comprising polymers and dispersants in a fluidized bed drier. The resulting bead-form pigment concentrates are nondusting and readily free-flowing The invention further embraces the use of pigment concentrates prepared in this way for coloring plastics and polymers.
Claims13
A process for preparing a pigment concentrate, which is nondusting and free-flowing, which comprises spraying an aqueous formulation, which comprises a pigment presscake, a wetting agent, a dispersant and water, into a fluidized bed, whereby said water is removed.
Dependencies are inferred from the claim text.