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1. CA2068431 - COMPOSITIONS STABILISEES A BASE DE FLUORURE STANNEUX POUR LES SOINS DE LA BOUCHE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An aqueous stannous fluoride composition for oral care, containing water-unstable stannous fluoride and lower alkyl vinyl ether and maleic anhydride or maleic acid copolymer as the essential stannous ion chelate forming stabilizer, the amount of said copolymer being sufficient to efficiently stabilize the stannous fluoride concentration, the composition being substantially free from soluble pyrophosphates, silica containing compounds and aldehyde containing flavoring agents.
2. A composition of claim 1, wherein the lower alkyl vinyl ether is methyl vinyl ether.
3. A composition of claim 1 or 2, wherein the composition is an aqueous non-abrasive home treatment gel composition.
4. A composition of claim 3, wherein the amount of stannous fluoride included in the composition provides from 0.05 to 5.0 percent by weight stannous fluoride, the copolymer being present in an amount from 0.5 to 5.0 percent by weight, the weight ratio of stannous fluoride to copolymer being from 0.01 to 1Ø
5. A composition of claim 1 or 2, wherein the composition is an aqueous mouthwash composition.
6. A composition of claim 5, wherein the amount of stannous fluoride included in the composition provides from 0.05 to 5.0 percent by weight stannous fluoride, the copolymer being present in an amount from 0.5 to 5.0 percent by weight, the weight ratio of stannous fluoride to copolymer being from 0.01 to 1Ø
7. A composition of claim 1 or 2, wherein the composition is an aqueous toothpaste composition.
8. A composition of claim 7, wherein the amount of stannous fluoride included in the composition provides from 0.05 to 5.0 percent by weight stannous fluoride, the copolymer being present in an amount from
0.5 to 5.0 percent by weight, the weight ratio of stannous fluoride to copolymer being from 0.05 to 1Ø
9. A composition of claim 7 or 8, wherein the composition includes an abrasive.
10. A composition of claim 9, wherein the abrasive is a calcium pyrophosphate.
11. A method for the preparation of an aqueous water-unstable stannous fluoride composition for oral care, which comprises dispersing the stannous fluoride in an aqueous solution of an alkyl vinyl ether and maleic anhydride or maleic acid copolymer as the essential stannous ion chelate forming stabilizer, the amount of said copolymer being sufficient to stabilize the stannous fluoride concentration during formulation.
12. A method of claim 11, wherein the alkyl vinyl ether is methyl vinyl ether.
13. A method of claim 11 or 12, wherein the amount of stannous fluoride included in the solution provides form 0.05 to 5.0 percent by weight stannous fluoride in the formulated composition.