Dentifrice compositions

A - Human Necessities – 61 – K

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Details

A61K 8/25 (2006.01) A61Q 11/00 (2006.01) C01B 33/193 (2006.01)

Patent

CA 2198856

Oral compositions, such as oral gels and toothpastes, containing a novel abrasive. A dentifrice composition comprising: (a) a precipitated silica, said precipitated silica being a low structure precipitated silica having a narrow particle size range distribution of soft particles and having a mean particle size ranging from 8 to 14 microns, preferably from 7 to 11 microns, an oil absorption ranging from 60 to 120 cc/100g, and a mercury intrusion (HGI) void volume of 1.0 to 4.0 cc/g; said precipitated silica, when formulated into a dentifrice, having a Pellicle Cleaning Ratio (PCR) from 70 to 140 and a Radioactive Dentin Abrasion (RDA) value of from 60 to 130; and wherein the ratio of said PCR to said RDA is at least 1:1; and wherein, as the particle size in microns increases in said silica, the RDA value remains substantially constant; and (b) from 0.1 % to 99 % of an orally-acceptable dentifrice carrier.

Compositions à usage bucco-dentaire, telles que les gels et les dentifrices, à base d'un nouvel agent abrasif. Une composition de dentifrice comprenant: a) une silice précipitée de faible structure présentant une répartition granulométrique étroite de particules tendres et une dimension particulaire moyenne de 8 à 14 microns, de préférence de 7 à 11 microns, une capacité d'absorption d'huile de 60 à 120 cm?3¿/100g et une intrusion mercurielle en volume interstitiel (HGI) de 1,0 à 4,0 cm?3¿/100g; la silice précipitée, lorsqu'elle est formulée en dentifrice, a un indice de nettoyage de pellicule (PCR) de 70 à 140 et une valeur d'abrasion de la dentine par test radioactif (RDA) de 60 à 130, le rapport entre PCR et RDA étant d'au moins 1:1 et la valeur RDA restant sensiblement constante lorsque la dimension particulaire en microns augmente; et b) de 0,1 % à 99 % d'un véhicule dentifrice, convenant à un usage bucco-dentaire.

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