Cation Compatible Metal Oxides and Oral Care Compositions Containing the Metal Oxides
AssigneeW. R. Grace & Co.-Conn.
InventorJames Miller
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Abstract
A cationic compatible metal oxide and oral care compositions containing the metal oxide are disclosed. Preferably, the oral care compositions contain a cationic compatible metal oxide and a cationic ingredient, such as for example, a cationic antibacterial agent such as cetyl pyridinium chloride (“CPC”). The cationic compatible metal oxide, e.g. silica, comprise metal oxide particles having a subtantially negative surface charge and a vitamin deposited onto or reacted with the surface of the metal oxide particles in an amount sufficient to provide a substantially positive surface charge on the metal oxide particle. Processes for making and using the vitamin modified metal oxide in oral care compositions are also disclosed.
Claims22
1-11. (canceled)
An oral care composition comprising
- (1) an antibacterial effective amount of at least one cationic antibacterial agent;
- and
- (2) a cationic compatible metal oxide comprising a metal oxide particle having a negative surface charge and a vitamin molecule immobilized on the surface of the metal oxide particle in an amount sufficient to provide a substantially positive charge on the surface of the metal oxide particle, said vitamin molecule being present in an amount sufficient to repel or minimize any reaction of the metal oxide with said at least one cationic antibacterial agent.
31-35. (canceled)
Dependencies are inferred from the claim text.