Precipitated silicic acid granules

US4179431A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Eberhard Kilian · Hanau, DE
• Alfons Kreher · Frankfurt, DE
• Peter Nauroth · Wesseling, DE
• Gunter Turk · Hanau, DE

Key dates

• Filing date: Jan 16, 1979
• Grant date: Dec 18, 1979
• Expiry date: Jan 16, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/21
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Free flowing, finely divided precipitated silicic acid granules of reduced dust content and reduced abrasion are obtained by a process including the step of subjecting a silicic acid suspension to intensive shearing action. Rubber compositions containing the precipitated silica produced in this way are also disclosed.