Particles, modified at their surface by hydrophilic and hydrophobic groups

US4715986A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Burghard Gruning · Essen, DE
• Ulrich Holtschmidt
• Goetz Koerner · Essen, DE
• Gerd Rossmy · Werden, DE

Key dates

• Filing date: Mar 26, 1985
• Grant date: Dec 29, 1987
• Expiry date: Mar 26, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2998
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Particles less than 100 .mu.m in size and modified by hydrophilic and hydrophobic groups wherein the hydrophilic and hydrophobic groups are distributed anisotropically on the surface of the modified particles. Processes for the preparation of such particles and the use of such particles as surface active products, especially for stabilizing or destablizing emulsions and foams as well as for tertiary oil recovery.