Preparation of nondusting free-flowing pigment concentrates

US6743835B2 · kind B2 · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Werner Schafer · Essen, DE
• Manfred Scheiba · Essen, DE
• Stefan Stadtmuller · Essen, DE
• Markus Weimann · Bottrop, DE
• Karlheinz Rumpler · Weimar, DE
• Ulrich Walter · Langenfeld, DE

Key dates

• Filing date: Dec 5, 2001
• Grant date: Jun 1, 2004
• Expiry date: Feb 21, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0094
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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.