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1. (WO2019007695) ORAL CARE COMPOSITION
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An oral care composition comprising:

a) a composite material;

b) a physiologically acceptable carrier;

wherein the composite material comprises:

(i) a first component material comprising a biomineralization agent; and

(ii) a second component material capable of reacting with phosphate ions to produce a calcium and phosphate in situ reaction product that adheres to tooth enamel, dentin or both and that is a reagent for hydroxyapatite formation;

wherein the biomineralization agent comprises amorphous calcium phosphate, o tricalcium phosphate, β-tricalcium phosphate, calcium deficient hydroxyapatite (Ca9(HP04)(P04)50H), dicalcium phosphate (CaHPC>4), dicalcium phosphate dehydrate (CaHP04-2H20), hydroxyapatite (Caio(P04)6(OH)2), octacalcium phosphate (CaeH2(P04)6-5H20), tetracalcium phosphate (Ca4(P04)20) or a mixture thereof; and

wherein the second component material comprises calcium oxide, calcium carbonate, calcium hydroxide, calcium sulfate, calcium carboxymethyl cellulose, calcium alginate, calcium salts of citric acid, calcium silicate or a mixture thereof.

The oral care composition according to claim 1 , wherein the biomineralization agent is hydroxyapatite.

The oral care composition according to claim 1 or claim 2, wherein the composite material comprises the first component material in an amount of from 3 to 98%, preferably from 20 to 90% by weight of the composite material.

The oral care composition according to any of the preceding claims, wherein the second component material comprises calcium silicate.

5. The oral care composition according to any of the preceding claims, wherein the composite material has a particle size in the range from 50 nm to 10 microns, preferably from 100 nm to 5 microns.

6. The oral care composition according to any of the preceding claims, wherein the composite material comprises the first component material and the second component material in a weight ratio of from 1 : 10 to 10: 1 , preferably from 1 :3 to 5: 1 .

7. The oral care composition according to any of the preceding claims, wherein the composite material is present in an amount from 0.25 to 60% by weight of composition, preferably from 0.5 to 40% by weight of the composition.

8. The oral care composition according to any of the preceding claims, wherein the composition further comprises phosphate source selected from trisodium phosphate, monosodium dihydrogen phosphate, disodium hydrogen phosphate, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, tripotassium phosphate, monopotassium dihydrogen phosphate, dipotassium hydrogen phosphate or a mixture thereof, preferably trisodium phosphate, monosodium dihydrogen phosphate or mixtures thereof.

9. The oral care composition according to any of the preceding claims, wherein the composition further comprises a metal source, preferably calcium silicate, calcium oxide or a mixture thereof.

10. The oral care composition according to any of the preceding claims, wherein the composition further comprises a benefit agent, preferably titanium dioxide coated with calcium silicate.

1 1 . The oral care composition according to any of the preceding claims, wherein the composition is a monophase anhydrous composition.

12. The oral care composition according to any one of the claims 8 to 10, wherein the oral care composition is a dual-phase composition comprising a first phase and a second phase, wherein the composite material is present in the first phase and the phosphate source is present in the second phase.

13. A process for manufacturing an oral care composition according to any of the preceding claims comprising the steps of:

i) mixing the first component material with solvent to produce a slurry;

ii) heating the slurry to from 25°C to 95°C for 0.5 hours to 3 hours;

iii) adding reagent suitable for in situ generation of the second component material into the slurry to form a reaction mixture;

iv) recovering the composite material from the reaction mixture; and

v) combining the composite material with physiologically acceptable carrier.

The process according to claim 13, wherein the reagent suitable for anionic portion of the second component material comprises sodium silicate, potassium silicate, sodium alginate, sodium sulfate, tetraethyl orthosilicate or mixtures thereof and wherein the reagent suitable for cationic portion of the second component material comprises calcium gluconate, calcium oxide, calcium lactate, calcium acetate, calcium hydroxide, calcium sulfate, calcium carboxymethyl cellulose, calcium chloride, potassium chloride, magnesium chloride, strontium chloride, aluminum chloride or mixtures thereof.

A method for reducing sensitivity and/or remineralizing and/or whitening of teeth of an individual comprising applying the composition as claimed in any one of claims 1 to 12 to at least one surface of the teeth of the individual.