Inhomogeneous silicas in dental care compositions

US6613309B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Stefan Uhrlandt · Niederkassel, DE
• Ralf Schmoll · Gerolzhofen, DE
• Arnold Storeck · Frankfurt, DE

Key dates

• Filing date: Mar 18, 2002
• Grant date: Sep 2, 2003
• Expiry date: Mar 18, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/40
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A silica comprising at least two silica fractions, wherein the at least two silica fractions differ by at least 10% in at least one of their BET surface area values, their CTAB surface area values or their DBP absorption values, the ranges of these three physicochemical properties being as follows:BET surface area30-300 m2/gCTAB surface area30-300 m2/gDBP absorption80-300 g/100 g.