	US 11,931,437 B2
	Silica abrasives with high stannous fluoride compatibility
Madhuleena Bhadra, Metuchen, NJ (US); Michael Prencipe, West Windsor, NJ (US); and Aarti Rege, East Windsor, NJ (US)
Assigned to Colgate-Palmolive Company, New York, NY (US)
Filed by Colgate-Palmolive Company, New York, NY (US)
Filed on Apr. 19, 2021, as Appl. No. 17/301,913.
Application 17/301,913 is a continuation of application No. 16/216,345, filed on Dec. 11, 2018, granted, now 11,000,459.
Claims priority of provisional application 62/599,383, filed on Dec. 15, 2017.
Prior Publication US 2021/0236396 A1, Aug. 5, 2021
Int. Cl. A61K 8/21 (2006.01); A61K 8/25 (2006.01); A61K 8/27 (2006.01); A61K 8/365 (2006.01); A61Q 11/00 (2006.01); C09K 3/14 (2006.01)

CPC A61K 8/21 (2013.01) [A61K 8/25 (2013.01); A61K 8/27 (2013.01); A61K 8/365 (2013.01); A61Q 11/00 (2013.01); A61K 2800/28 (2013.01); A61K 2800/412 (2013.01); A61K 2800/5922 (2013.01); C09K 3/1409 (2013.01)]

16 Claims

1. A dentifrice composition comprising:

a zinc ion source, wherein the zinc ion source is a soluble or sparingly soluble compound of zinc with inorganic counterions;

stannous fluoride; and

a silica abrasive having a N₂BET surface area of less than 50 m²/g and an Einlehner hardness of from 4 to 11, and an oil absorption of from 80 cc/100 g to 100 cc/100 g.