C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 33/12 (2006.01) A61K 8/25 (2006.01) A61Q 11/00 (2006.01) C01B 33/14 (2006.01)
Patent
CA 2591703
A method of making precipitated silica abrasive compositions having excellent cleaning performance and lower abrasiveness with post-reactor sizing of the abrasive particles being performed via air classification techniques is provided. By targeting a specific particle size range, it has been determined that higher pellicle film cleaning levels may be achieved without also increasing the dentin abrasion properties of the silica products themselves. As a result, dentifrices including such classified abrasive silica products, and exhibiting particularly desirable cleaning benefits, can be provided for improved tooth polishing, whitening, and the like, without deleteriously affecting the hard tooth surfaces. Also encompasses within this invention also are products of this selective process scheme and dentifrices containing such classified silica products.
L~invention concerne un procédé permettant de conférer à des compositions abrasives de silice précipitée d~excellentes performances de nettoyage et une abrasivité moindre et un calibrage après réaction des particules abrasives obtenues grâce à des techniques de classification pneumatique. En ciblant une plage de tailles de particules spécifique, on a déterminé que des niveaux de nettoyage de la pellicule plus élevés peuvent être atteints sans pour autant augmenter les propriétés d~abrasion de la dentine des produits de silice eux-mêmes. Ainsi, des dentifrices contenant de tels produits de silice abrasive classée et présentant des attraits en termes de nettoyage particulièrement souhaités peuvent être produits pour améliorer le polissage des dents, leur blancheur et autres, sans affecter de manière délétère les surfaces dures des dents. La présente invention comprend en outre des produits de ce système de procédé sélectif et des dentifrices contenant de tels produits de silice classée.
Cornelius John Mark
Mcgill Patrick D.
J.m. Huber Corporation
Moffat & Co.
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