Precipitated silicas and process for their production and use

US5110574A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Helmut Reinhardt
• Adam Becker · New York, US
• Robert Kuhlmann · Lechenich, DE
• Peter Nauroth · Wesseling, DE

Key dates

• Filing date: Dec 7, 1988
• Grant date: May 5, 1992
• Expiry date: Dec 7, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/90
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Process for the production of cleansing, polishing and thickening silica for use in toothpastes, which is characterized in that using the conventional precipitation processes, silica suspensions are obtained of various particles sizes and particle densities and are mixed thoroughly together until the mixture is homogenous in the suspension phase and the resulting suspension mixture is treated in the conventional manner by filtering, drying and comminuting.