Oral care compositions with reduced surface staining

Patent metadata

Field	Value
Publication number	US-10045927-B2
Application number	US-201415107562-A
Country	US
Kind code	B2
Filing date	Dec 10, 2014
Priority date	Dec 23, 2013
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

Surface staining can be minimized or eliminated by providing an oral care composition comprising a first film comprising a pigment; and optionally a second film; wherein the first film has a dissolution rate in aqueous media that is inversely proportional to its thickness, wherein the first film is in the form of a particle.

First claim

What is claimed is:

1. A toothpaste composition comprising a single-layer film comprising, by dry weight of the film, 20-60 wt. % cellulose ether selected from alkylcellulose, hydroxyalkyl cellulose, and combinations thereof; 10-30 wt. % plasticizer selected from sorbitol, propylene glycol, glycerol, and polyethylene glycol; 1-5 wt. % non-ionic polysorbate surfactant; and 15-55 wt. % pigment;
wherein the film is dissolved after a period of greater than 30 seconds and less than 180 seconds of brushing, scrubbing or agitation in the oral cavity in the presence of water; and the film is in the form of a particle having a size of 30 to 50 mesh.

2. The composition of claim 1 wherein the cellulose ether comprises a hydroxylalkyl cellulose.

3. The composition according to claim 1 , wherein the cellulose ether comprises an alkylcellulose which comprises methylcellulose.

4. The composition according to claim 2 , wherein the hydroxyalkyl cellulose is selected from: hydroxypropyl methyl cellulose, hydroxyethylpropyl cellulose, hydroxybutyl methyl cellulose, carboxymethyl cellulose and a combination of two or more thereof.

5. The composition according to claim 1 , wherein the plasticizer comprises propylene glycol.

6. The composition according to claim 1 , wherein the non-ionic polysorbate surfactant comprises polysorbate 80.

7. The composition according to claim 1 , wherein the pigment comprises Pigment Blue 15 [147-14-8], Pigment Blue 15:2, Pigment Green 7 [1328-53-6], Pigment Orange 5 [3468-63-1], Pigment Red 4 [2814-77-9], Pigment Red 5 [6410-41-9], Pigment Red 48:4 [5280-66-0], Pigment Red 53:1 [5160-02-1], Pigment Red 57 [5858-81-1], Pigment Red 57:1 [5281-04-9]; Pigment Red 57:2 Barium Lake [17852-98-1], Pigment Red 63:1 [6417-83-0], Pigment Red 64:1 [6371-76-2], Pigment Red 68 [5850-80-6], Pigment Red 83, Pigment Red 90:1 Aluminum Lake [16508-80-8], Pigment Red 112 [6535-46-2], Pigment Red 172 Aluminum Lake [12227-78-0], Pigment Red 173 Aluminum Lake, Pigment Violet 19 [1047-16-1], Pigment Yellow 1 [2512-29-0], Pigment Yellow 3 [6486-23-3], Pigment Yellow 12 [6358-85-6], Pigment Yellow 13 [5102-83-0], Pigment Yellow 73 [13515-40-7] or a combination of any of these pigments.

8. The composition according to claim 1 , wherein the film comprises, by dry weight of the film, 20-60 wt. % of a cellulose ether selected from methyl cellulose, hydroxypropylmethyl cellulose, and a combination thereof; 10-30 wt. % propylene glycol; 1-5 wt. % polysorbate 80; and 15-55 wt. % pigment.

9. The oral care composition of claim 1 , wherein the composition further comprises an active agent selected from the group consisting of flavoring, an anesthetic, an antibacterial agent, an amino acid, a fluoride source, a whitening agent, a zinc compound and mixtures thereof.

10. The oral care composition of claim 1 , wherein the oral care composition further comprises an anionic surfactant in an amount from 1.5 wt. % to 5.0 wt. %.

11. The oral care composition of claim 1 , wherein the oral care composition further comprises an anionic surfactant in an amount from 1.5 wt. % to 2.0 wt. % and wherein the anionic surfactant is sodium lauryl sulfate.

Assignees

• Colgate Palmolive Co

Inventors

• Szewczyk Gregory
• Patel Neeta A
• Jogun Suzanne
• Potnis Shashank

Classifications

• A61K8/0254

  Platelets; Flakes · CPC title

• A61K8/463

  containing sulfuric acid derivatives, e.g. sodium lauryl sulfate · CPC title

• A61K8/345

  containing more than one hydroxy group · CPC title

• A61K8/731 Primary

  Cellulose; Quaternized cellulose derivatives · CPC title

• A61Q11/00

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