Transparent silica gel/precipitated silica composite...

A - Human Necessities – 61 – K

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A61K 8/25 (2006.01) A61K 8/04 (2006.01) A61Q 11/00 (2006.01)

Patent

CA 2725310

s rac A gel/precipitate silica composite for use in a dentifrice composition has a maximum light transmission of at least 25 % within a refractive index range of from about 1.432 to about 1.455; a relative flavor availability as compared to silica sand of at least 50 %; a CTAB of less than about 40; and, when incorporated into a dentifrice composition in an amount of 20 % by weight, said dentifrice has a RDA (Relative Dentin Abrasion) value of at most 130; a PCR (Pellicle Cleaning Ratio):RDA ratio of from 0.7 to 1.3; and a haze value after 24 hours of less than about 50 %.

L'invention porte sur un composite de gel de silice/silice précipitée destiné à être utilisé dans une composition de dentifrice, lequel a une transmission de lumière maximale d'au moins 25 % sur une plage d'indices de réfraction d'environ 1,432 à environ 1,455; une disponibilité d'arôme relative par comparaison au sable de silice d'au moins 50 %; une CTAB inférieure à environ 40; et, lorsqu'il est incorporé dans une composition de dentifrice dans une quantité de 20 % en poids, ledit dentifrice a une valeur de RDA (abrasion relative de la dentine) d'au maximum 130; un rapport PCR (rapport de nettoyage de pellicule):RDA de 0,7 à 1,3; et une valeur de voile au bout de 24 heures inférieure à environ 50 %.

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