Oral care compositions and methods
This application relates to novel black translucent oral care compositions useful for combining and delivering incompatible stannous fluoride or stannous chloride and potassium salts in a charcoal composition, for example, to provide effective caries prevention, protection against dental erosion, and relief from dental hypersensitivity. The compositions comprise stannous fluoride or stannous chloride, nitric acid or a water-soluble nitrate salt, a water-soluble alkali metal polyphosphate and more than 10% water, by weight of the composition.
1 . A black translucent single-component oral care composition comprising:
(i) from 0.1 to 2 wt. % of stannous fluoride or stannous chloride;
(ii) from 0.1 to 5 wt. % of nitric acid or a water-soluble nitrate salt;
(iii) from 0.1 to 5 wt. % of a water-soluble alkali metal polyphosphate comprising tetrasodium pyrophosphate and/or sodium tripolyphosphate;
(iv) more than 10 wt. % of water; and
(v) 0.001 to 0.0080.01 wt. % of charcoal,
wherein all weight percentages are based on the total weight of the black translucent single-component oral care composition,
wherein the composition has a molar ratio of the stannous fluoride or the stannous chloride to the nitric acid or the water-soluble nitrate salt to the tetrasodium pyrophosphate and/or the sodium tripolyphosphate of 1:1:1 to 1:10:1.7, and
wherein the composition is formulated as a dentifrice and has a pH of 5 to 9, and wherein the composition has L*a*b color values of 1-50 for L, and/or −0.1 to 0.1 for a, and/or −0.25 to 0.25 for b, and wherein the oral care composition has a turbidity of less than 1000 NTU, as measured on a 10 mm thick sample.
2 . The oral care composition of claim 1 , wherein the charcoal is present in an amount of 0.005 to 0.0075 wt. %.
3 . The oral care composition of claim 1 , wherein the oral care composition does not comprise any white pigment.
4 . The oral care composition of claim 1 , wherein the water-soluble nitrate salt is selected from an alkali earth metal nitrate, alkaline earth metal nitrate, zinc nitrate, silver nitrate, ammonium nitrate, and a combination thereof.
5 . The oral care composition of claim 1 , wherein the water-soluble nitrate salt is selected from lithium nitrate, sodium nitrate, potassium nitrate, magnesium nitrate, calcium nitrate, and a combination thereof.
6 . The oral care composition of claim 1 , wherein the water-soluble nitrate salt is potassium nitrate.
7 . The oral care composition of claim 1 , wherein the water-soluble alkali metal polyphosphate is selected from a pyrophosphate, tripolyphosphate, tetraphosphate, hexametaphosphate, and a combination thereof.
8 . The oral care composition of claim 7 , wherein the water-soluble alkali metal polyphosphate is selected from sodium pyrophosphate, potassium pyrophosphate, sodium tripolyphosphate, potassium tripolyphosphate, and a combination thereof.
9 . The oral care composition of claim 1 , wherein the water-soluble nitrate salt is potassium nitrate and the water-soluble alkali metal polyphosphate salt is tetrasodium pyrophosphate.
10 . The oral care composition of claim 1 , wherein the oral care composition comprises a molar ratio of alkali metal polyphosphate to stannous fluoride or stannous chloride of at least 1:1.
11 . The oral care composition of claim 1 , wherein the oral care composition comprises a molar ratio of the nitric acid or the water-soluble nitrate salt to the stannous fluoride or the stannous chloride of at least 0.3:1.
12 . The oral care composition of claim 1 , wherein the water is present in an amount of at least 15 wt. %.
13 . The oral care composition of claim 1 , wherein the water is present in an amount of 10 to 50 wt. %.
14 . An oral care package comprising the oral care composition according to claim 1 , wherein the package comprises a container comprising a single storage compartment, which compartment contains the oral care composition, and a closure which seals the compartment.
15 . A method of treatment or prevention of gingivitis, plaque, dental caries, and/or dental hypersensitivity, the method comprising the application to the oral cavity of a person in need thereof, of the oral care composition according to claim 1 .
16 . A black translucent single-component oral care composition comprising:
(i) from 0.1 to 2 wt. % of stannous fluoride or stannous chloride;
(ii) from 0.1 to 5 wt. % of nitric acid or a water-soluble nitrate salt;
(iii) from 0.1 to 5 wt. % of a water-soluble alkali metal polyphosphate;
(iv) more than 10 wt. % water; and
(v) an amount up to about 0.008 wt. % of charcoal,
wherein all weight percentages are based on the total weight of the oral care composition,
wherein the oral care composition has a molar ratio of the stannous fluoride or the stannous chloride to the nitric acid or the water-soluble nitrate salt to the tetrasodium pyrophosphate and/or the sodium tripolyphosphate of 1:1:1 to 1:10:1.7, and wherein the oral care composition is formulated as a dentifrice and has a pH of 5 to 9,
wherein the oral care composition is formulated as a dentifrice and has a pH of 5 to 9, and wherein the oral care composition has L*a*b color values of 1-50 for L, and/or −0.1 to 0.1 for a, and/or −0.25 to 0.25 for b, wherein the oral care composition has a turbidity of less than 1000 NTU measured on a 10 mm thick sample.
17 . The black translucent single-component oral care composition according to claim 16 , wherein the water-soluble alkali metal polyphosphate comprises sodium pyrophosphate, potassium pyrophosphate, sodium tripolyphosphate, potassium tripolyphosphate, or a combination thereof.
18 . The black translucent single-component oral care composition according to claim 16 , wherein the water-soluble alkali metal polyphosphate comprises sodium pyrophosphate, sodium tripolyphosphate, or a combination thereof.
19 . The black translucent single-component oral care composition according to claim 16 , wherein the water is present in an amount of at least 15 wt. %.