Electrochemical tooth whitening composition and method thereof

Patent metadata

Field	Value
Publication number	US-12151007-B2
Application number	US-202016912904-A
Country	US
Kind code	B2
Filing date	Jun 26, 2020
Priority date	Jun 26, 2020
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

The present invention is directed to a process for electrochemically whitening a tooth, the process comprising: a) contacting the tooth with a whitening gel that is located in a dental device, the dental device comprising a positive electrode and a negative electrode; b) flowing a current between the positive electrode and the negative electrode through the whitening gel to whiten the tooth; wherein the whitening gel comprises: water; a bleaching agent; a thickener composition comprising a non-ionic compound; a surfactant; and an electrolyte source comprising a first conductive salt.

First claim

What is claimed is:

1. A tooth-whitening kit comprising:
a dental device comprising a positive electrode and a negative electrode;
a single component whitening gel comprising:
a liquid carrier comprising water;
a bleaching agent;
a thickener composition present in an amount ranging from about 0.1 wt. % to about 5.0 wt. % based on the total weight of the single component whitening gel, the thickener comprising a non-ionic compound, the non-ionic compound comprising hydroxyethyl cellulose;
a surfactant present in an amount ranging from about 0.5 wt. % to about 6.0 wt. % based on the total weight of the single component whitening gel, the surfactant comprising cocoamidopropyl betaine;
a humectant present in an amount ranging from about 1.0 wt. % to about 9.0 wt. % based on the total weight of the single component whitening gel, the humectant comprising glycerin; and
an electrolyte source comprising a conductive salt, wherein the conductive salt is selected from the group consisting of sodium chloride or potassium chloride.

2. The tooth-whitening kit according to claim 1 , wherein the single component whitening gel is substantially free of sulfate compounds.

3. The tooth-whitening kit according to claim 1 , wherein the thickening agent is substantially free of anionic compounds.

4. The tooth-whitening kit according to claim 1 , wherein the bleaching agent comprises a peroxide source selected from the group consisting of hydrogen peroxide, urea peroxide, glyceryl peroxide, benzoyl peroxide.

5. The tooth-whitening kit according to claim 1 , wherein the single component whitening gel has a pH ranging from about 4.0 to about 6.5.

6. The tooth-whitening kit according to claim 1 , wherein the dental device comprises a trough, the positive electrode and negative electrode located in the trough, and wherein the positive electrode and the negative electrode are spaced apart by a distance ranging from about 5 mm to about 20 mm.

Assignees

• Colgate Palmolive Co

Inventors

• Dogu Nihal
• Davies-Smith Leighton

Classifications

• A61Q11/00 Primary

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

• A61K2800/92

  Oral administration · CPC title

• A61K2800/88

  Two- or multipart kits · CPC title

• A61K2800/83

  Electrophoresis; Electrodes; Electrolytic phenomena · CPC title

• A61K2800/48

  Thickener, Thickening system · CPC title