IP Library › Granted Patent US 10,098,829
Granted Patent B2
US 10,098,829 · App. 14/116,371 · Granted Oct 16, 2018

Low water metal ion dentifrice

Inventors: Steven Fisher (Middlesex, NJ); Lynette Zaidel (Cranford, NJ); Michael Prencipe (Princeton Junction, NJ)
Assignee: Colgate-Palmolive Company
A61K8/8176A61K8/19A61K8/21A61K8/24A61K8/27A61K8/365A61Q11/00A61K2800/48
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Quick Facts
Patent No.
US 10,098,829
App. No.
14/116,371
Granted
Oct 16, 2018
Kind
B2
Abstract

A dentifrice composition having a low water phase comprising effective amounts of polyphosphate and ionic active ingredients. The composition comprises a source of metal ions, an inorganic phosphate salt having four or more phosphorus atoms and a cross-linked polyvinylpyrrolidone thickening agent in a single phase. Preferred metal ions are stannous, copper and zinc, in particular from zinc citrate and stannous fluoride.

Claims (21)

1. A low water dentifrice composition comprising in a single phase:

a source of metal ions;

at least one polyphosphate salt selected from the group consisting of inorganic polyphosphate salts which have four or more phosphorous atoms; and

a thickening agent comprising a cross-linked polyvinylpyrrolidone;

wherein the dentifrice composition is a paste or gel, wherein the dentifrice composition has a total water content of 3% to 10% based on the weight of the composition, and wherein the at least one polyphosphate salt comprises from 1 to 10 wt % of the composition; and

wherein the source of metal ions comprises zinc citrate and stannous fluoride present in a combined amount of from 0.45 to 5% by weight of the composition;

wherein the cross-linked polyvinylpyrrolidone is present in an amount of 0.05 to 15% by weight of the composition;

wherein the composition does not comprise a peroxide source, and does not comprise a pyrophosphate or tripolyphosphate.

2. The composition of claim 1 , wherein the thickening agent consists essentially of a cross-linked polyvinylpyrrolidone.

3. The composition of claim 1 , wherein the at least one polyphosphate is an alkali metal salt of a hexametaphosphate.

4. The composition of claim 3 , wherein the at least one polyphosphate is sodium hexametaphosphate.

5. The composition of claim 1 , wherein the at least one polyphosphate salt comprises from 3 to 7 wt % of the composition.

6. The composition of claim 1 , wherein the dentifrice composition has a total water content of 3% to 4% based on the weight of the composition.

7. The composition of claim 1 , further comprising an aqueous buffer system for the source of metal ions.

8. The composition of claim 7 , wherein the buffer system is adapted to chelate the metal ions in the composition.

9. The composition of claim 8 , wherein the buffer system comprises at least one of an organic acid or an alkali metal salt thereof.

10. The composition of claim 9 , wherein the organic acid is citric acid.

11. The composition of claim 9 , wherein the buffer system comprises a mixture of citric acid and trisodium citrate.

12. The composition of claim 9 , wherein the buffer system comprises from 0.1 to 10 wt % of the composition.

13. The composition of claim 9 , wherein the buffer system is present, by weight, in an amount which is greater than the amount, by weight, of the source of metal ions.

14. The composition of claim 1 , wherein the at least one polyphosphate is an alkali metal salt of a tetraphosphate.

Continuity (1)
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Cited By (1)
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