Use of a high structure and dispersible precipitated silica as a thickening or texturing agent in toothpaste compositions

US7033576B2 · kind B2 · utility

Assignee

• RHODIA CHIMIE · FR

Inventors

• Yvonick Chevallier · Fontaines-Saint-Martin, FR
• Adrien Dromard · Val-de-Reuil, FR
• Pierre-Yves Lahary · Val-de-Reuil, FR
• Céline Marcandelli · Paris, FR

Key dates

• Filing date: Jun 6, 2001
• Grant date: Apr 25, 2006
• Expiry date: Feb 13, 2023

Classification

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

Abstract

The invention concerns the use, as thickening or texturing agent in toothpaste compositions, of a highly dispersible precipitated silica having a pH of 3.5 to 9, a DOP oil absorption higher than 200 ml/g, a CTAB specific surface area from 70 to 250 m2, a median diameter of at least 20 μm determined by ultrasound-free laser diffraction, a residual anion rate, expressed in sodium sulphate, less than 5 wt. %.