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1. (WO2005067877) COMPOSITIONS DE DENTIFRICE
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CLAIMS

1. A dentifrice composition comprising an abrasive system comprising a combination of a crystalline aluminosilicate having an average crystallite size below 1.0 μm and a water-soluble, orally acceptable calcium sequestering agent plus an orally acceptable carrier.

2. A dentifrice composition comprising an abrasive system comprising a combination of a crystalline aluminosilicate having an RDA of less than 120 and a calcium binding capacity of at least 100 mg CaO per gram of anhydrous aluminosilicate and a water-soluble, orally acceptable calcium sequestering agent plus an orally acceptable carrier.

3. A dentifrice composition as claimed in any one of the preceding claims in which the sequestering agent is selected from one or more of the group comprising alkali metal polyphosphates, carboxylates and alkali metal salts of aminoacetates.

4. A dentifrice composition as claimed in any one of the preceding claims in which the calcium-sequestering agent is sodium tripolyphosphate.

5. A dentifrice composition as claimed in any one of the preceding claims in which the calcium sequestering agent is present in the range 0.1-20% by weight.

6. A dentifrice composition as claimed in any one of the preceding claims in which the aluminosilicate comprises a zeolite having the formula; M2/nO . Al2O3 . xSiO2 . yH2O

7. A dentifrice composition as claimed in Claim 6 in which the zeolite is a P zeolite.

8. A dentifrice composition as claimed in any preceding claim in which the RDA of a complete formulation is 25-200.

9. A dentifrice composition as claimed in any one of the preceding claims wherein the pH is from 6 to 10.5.

10. A dentifrice composition as claimed in any one of the preceding claims further comprising a fluoride source.