Deagglomerated barium sulfate

US7846409B2 · kind B2 · utility

Assignee

• Solvay Infra Bad Hoenningen GmbH · DE

Inventors

• Ferdinand Hardinghaus · Bad Honnef, DE
• Christopher David Glende · Oettingen, DE
• Karl Hoehler · Bad Salzdetfurth, DE
• Won Jai Park · Oettingen, DE
• Rainer Stahl · Nuremberg, DE
• Andreas Poppe · Clüversborstel, DE

Key dates

• Filing date: Dec 1, 2004
• Grant date: Dec 7, 2010
• Expiry date: Jun 5, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/22
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention discloses deagglomerated barium sulphate which has an average primary particle size of less than 0.5 μm and is coated with a dispersant. The dispersant has preferably reactive groups which are able to interact with the surface of the barium sulphate; particularly preferred dispersants are those which are able to endow the barium sulphate with a hydrophilic surface and have reactive groups for coupling to or into polymers. Also disclosed is a plastics premix comprising the deagglomerated, coated barium sulphate.