Tubule-blocking silica materials for dentifrices

Details Tubule-blocking silica materials for dentifrices Tubule-blocking silica materials for dentifrices

A - Human Necessities

61

K

A61K 8/19 (2006.01) A61K 8/25 (2006.01) A61K 8/26 (2006.01) A61K 8/27 (2006.01) A61Q 11/00 (2006.01)

Patent

CA 2734827

Precipitated silica materials are provided for utilization as abrasives or thickeners within dentifrice formulations that simultaneously effectuate tubule blocking within tooth dentin to reduce dentin sensitivity. Such precipitated silica materials have sufficiently small particle sizes and exhibit certain ionic charge levels by, for example, adjusting the zeta potential properties of the precipitated silica materials through treatment with certain metals to permit effective static attraction and eventual accumulation within dentin tubules when applied to teeth from a dentifrice formulation.

L'invention porte sur des matières à base de silice précipitée utilisés comme abrasifs ou épaississants de formulations dentifrices qui effectuent simultanément le blocage des tubules dans la dentine des dents pour en réduire la sensibilité. De telles matières à base de silice précipitée renferment des particules de taille suffisamment petite et présentent certains niveaux de charge ionique (par ajustement des propriétés de potentiel zêta des matières à base de silice précipitée par traitement avec certains métaux, par exemple) pour permettre une attraction statique efficace et une accumulation subséquente dans les tubules de la dentine lorsqu'appliquées sur les dents dans une formulation dentifrice.

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