Oral care compositions

Patent metadata

Field	Value
Publication number	US-10213368-B2
Application number	US-201514633389-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	May 7, 2014
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

Oral care composition comprise a stannous ion source and a thickener consisting essentially of carrageenan and xanthan gum. A method for treating the oral cavity comprises administering the composition to the oral cavity in a toothpaste.

First claim

What is claimed is:

1. An oral care composition comprising:
a. from 0.01% to 2% by weight of a stannous chloride source;
b. a thickening agent consisting of:
i) from 1% to 5% by weight carrageenan; and
ii) from 0.3% to 0.875% by weight xanthan gum;

c. at least 30% by weight of a total water content; and
d. from 20% to 80% of a humectant selected from the group consisting of glycerin, sorbitol, xylitol, butylene glycol, polyethylene glycol, propylene glycol, and combinations thereof;
e. a dental abrasive consisting of precipitated silica;
f. from 0.01% to 2% by weight of a fluoride ion source;
wherein the composition has a pH of greater than 4 and comprises less than 0.001% of a charged cellulose derivative having greater than 0.5 charged groups per sugar residue unit along the polysaccharide backbone;
wherein the composition has a Tip Viscosity of greater than 100 Pa·s after 4.5 months at 40° C.;
wherein the xanthan gum has a degree of substitution of less than 0.4 carboxylate groups per sugar residue.

2. The oral care composition according to claim 1 , wherein the charged cellulose derivative is carboxymethyl cellulose (CMC).

3. The oral care composition according to claim 1 , wherein the stannous chloride is selected from the group consisting of stannous chloride dehydrate, stannous chloride anhydrous, and combinations thereof.

4. The oral care composition according to claim 1 , wherein the carrageenan is present in the amount of from 0.7% to 2% by weight.

5. The oral care composition according to claim 4 , wherein the carrageenan is selected from the group consisting of Kappa-carrageenan, Iota-carrageenan, Lambda carrageenan, and combinations thereof.

6. The oral care composition according to claim 5 , wherein the carrageenan is Iota-carrageenan.

7. The oral care composition according to claim 1 , wherein the pH is between 4.5 and 9.5.

8. The oral care composition according to any claim 7 , wherein the pH is between 5 and 7.

9. The oral care composition according to claim 1 , wherein the total water content is between 30% to 60% by weight.

10. The oral care composition according to claim 1 , further comprising 0.1% to 10% by weight of a chelant.

11. The oral care composition according to claim 10 , wherein the chelant is selected from the group consisting of a lactate, citrate, gluconate, and combinations thereof.

12. The oral care composition according to claim 1 , wherein the Tip Viscosity does not substantially decrease after 4 months at 25° C.

13. A method for treating the oral cavity comprising administering to the oral cavity an oral care composition according to claim 1 .

14. An oral care composition comprising:
a. from 0.01% to 2% by weight of stannous chloride;
b. a thickening agent consisting of:
i) from 1.25% to 3% by weight carrageenan; and
ii) from 0.3% to 0.875% by weight xanthan gum;

c. at least 30% by weight of a total water content; and
d. from 20% to 80% of a humectant selected from the group consisting of glycerin, sorbitol, xylitol, butylene glycol, polyethylene glycol, propylene glycol, and combinations thereof;
e. a dental abrasive consisting of precipitated silica;
f. from 0.01% to 2% by weight of stannous fluoride;
wherein the composition has a pH of greater than 4 and comprises less than 0.001% of a charged cellulose derivative having greater than 0.5 charged groups per sugar residue unit along the polysaccharide backbone.

Assignees

• Procter & Gamble

Inventors

• Li Xiaoxiao
• Li Yujun
• Strand Ross
• Broth Andrew Frederic
• Glandorf William Michael
• Burgess Steven Carl
• Xu Xiujun

Classifications

• A61Q11/00

  Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses · CPC title

• A61K8/19 Primary

  containing inorganic ingredients · CPC title

• A61K2800/48

  Thickener, Thickening system · CPC title

• A61K2800/52

  Stabilizers · CPC title

• A61K8/73

  Polysaccharides · CPC title