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US 4,309,409 AGranted
Anti-corrosion formulation for toothpastes
AssigneeStauffer Chemical Company
InventorsMiguel Coll-Palagos, Frances C. Benkwitt
Life of this patent
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AssigneeStauffer Chemical Company
InventorsMiguel Coll-Palagos, Frances C. Benkwitt
Estimating the term…
A formulation which consists essentially of from about 20%, by weight, to about 87%, by weight, zinc oxide, from about 13% to about 80%, by weight of a selected type of acidic pH adjuster, and from about 0% to about 7%, by weight, of trimagnesium phosphate, when incorporated in fluorine-containing toothpaste formulations which also contain at least one compound selected from the group consisting of an insoluble alkali metal metaphosphate and calcium pyrophosphate, yields a smooth paste having a pH of from about 5.5 to about 6.8 which will not corrode the inside of unlined aluminum tubes containing such a formulation. When the components of the formulation are based on the weight of the entire toothpaste formulation, said zinc oxide can be present at from about 0.05% to about 2.0%, the acidic pH adjuster can be present at from about 0.05% to about 3.0%, and the trimagnesium phosphate can be present at from about 0% to about 0.5%.
A formulation which is adapted to be contained in a fluoride toothpaste containing an effective amount of water soluble fluoride compound for protection from tooth decay and at least one compound selected from the group consisting of an insoluble alkali metal metaphosphate and calcium pyrophosphate, said formulation being adapted to be packaged in an unlined aluminum tube, the formulation consisting essentially of:
A fluoride toothpaste formulation containing an effective amount of a water soluble fluoride compound for protection from tooth decay and at least one compound selected from the group consisting of an insoluble alkali metal metaphosphate and calcium pyrophosphate which is adapted to be packaged in an unlined aluminum tube, said formulation also comprising:
A packaged fluoride toothpaste formulation in an unlined aluminum tube, said toothpaste formulation containing an effective amount of a water soluble fluoride compound for protection from tooth decay and at least one compound selected from the group consisting of an insoluble alkali metal metaphosphate and calcium pyrophosphate, said toothpaste formulation also comprising:
A formulation as claimed in claim 18 wherein trimagnesium phosphate is also present at up to about 0.2%.
Dependencies are inferred from the claim text.