B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
B03B 7/00 (2006.01) A61K 8/00 (2006.01) A61K 8/18 (2006.01) B07B 9/00 (2006.01) C01B 33/12 (2006.01)
Patent
CA 2591704
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 encompassed within this invention also are products of this selective process scheme and dentifrices containing such classified silica products.
L'invention concerne une méthode de fabrication de compositions abrasives de silice précipitée offrant une excellente performance de nettoyage et une faible abrasivité, la séparation granulométrique post-réacteur des particules abrasives s'effectuant par des techniques de classification d'air. Le ciblage d'une plage de dimensions particulaires spécifique permet d'atteindre des niveaux de nettoyage de film pelliculaire plus élevés que ceux de l'état de la technique, sans augmenter les propriétés d'abrasion de la dentine des produits de silice eux-mêmes. Par conséquent, l'invention concerne des dentifrices comprenant de tels produits de silice abrasifs classifiés, et présentant des avantages de nettoyage particulièrement souhaitables. Ces dentifrices peuvent être appropriés pour un polissage dentaire amélioré, un blanchiment accru, et analogue, sans nuire aux surfaces dentaires dures. L'invention concerne également des produits analogues et des dentifrices contenant de tels produits de silice classifiés.
Cornelius John Mark
Mcgill Patrick Danald
J.m. Huber Corporation
Moffat & Co.
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