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US 2003/0147816 A1Published application
Use of a high sturcture and dispersible precipitated silica as a thickening or texturing agent in toothpaste compositions
AssigneeRhodia Chimie
InventorsYvonick Chevallier, Adrien Dromard, Pierre-Yves Lahary, Celine Marcandelli
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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. %.
Claims28
The use, as a thickener or texturing agent in toothpaste compositions, of a precipitated silica having
- a pH from 3.5 to 9, preferably from 4 to 9 and most particularly from 5 to 8
- a DOP oil uptake of greater than 200 ml/g, preferably greater than 230 ml/g and most particularly greater than 250 ml/g
- a CTAB specific surface area from 70 to 250 m2/g and preferably from 100 to 200 m2/g
- a median diameter of at least 20 μm, preferably of at least 25 μm, determined by laser scattering without ultrasound
- a residual anion content, expressed as sodium sulfate, of less than 5% by weight and preferably less than 3% by weight.
2 more elements
Dependencies are inferred from the claim text.