Method for producing a surfactant-free suspension based on nanostructured, hydrophobic particles, and use of the same

US7964244B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Markus Oles · Hattingen, DE
• Edwin Nun · Billerbeck, DE
• Bernhard Schleich · Recklinghausen, DE

Key dates

• Filing date: May 28, 2003
• Grant date: Jun 21, 2011
• Expiry date: May 23, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K9/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention describes a process for preparing a surfactant-free suspension including hydrophobic particles and at least 50.01% by weight of water, where hydrophobic, nanostructured particles are suspended in at least one organic solvent miscible with water and having a boiling point below 150° C., and then this concentrated organic suspension is intensively and thoroughly mixed with surfactant-free water.