# US 8,540,971 B2 · Oral care composition with cross-linked polymer peroxide

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- Number: US 8,540,971 B2
- Document ID: US8540971B2
- Status: Granted
- Kind: B2
- Application number: 12/036,674
- Filed: 2008-02-25
- Published: 2008-06-19
- Granted: 2013-09-24
- Earliest claimed: 2004-08-27
- Assignees: Colgate-Palmolive Company
- Applicants: Lynette Zaidel; Guisheng Pan; Suman K. Chopra; Prakasarao Mandadi; Michael Prencipe
- Inventors: Lynette Zaidel; Guisheng Pan; Suman K. Chopra; Prakasarao Mandadi; Michael Prencipe
- Web page: https://patentgrep.com/patent/US8540971B2

## CPC

- A61K 8/8176: {Homopolymers of N-vinyl-pyrrolidones. Compositions of derivatives of such polymers}
- A61K 8/0208: {Tissues; Wipes; Patches}
- A61K 8/22: Peroxides; Oxygen; Ozone
- A61K 8/24: Phosphorous; Compounds thereof
- A61K 8/49: containing heterocyclic compounds
- A61K 8/817: {Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)}
- A61K 8/891: saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
- A61K 8/90: Block copolymers (A61K8/89 takes precedence)
- A61Q 11/00: Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
- A61Q 11/02: Preparations for deodorising, bleaching or disinfecting dentures
- A61K 2800/805: Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

Oral care compositions comprising: (a) a peroxide complex comprising a peroxide component and an N-vinyl heterocyclic polymer (e.g., poly-N-vinyl polylactam, or poly-N-vinyl-polyimide); (b) a whitening agent (e.g., hydrogen peroxide); and (c) an orally acceptable carrier. In one embodiment, the carrier comprises a film forming material. Methods are also provided for making an oral care composition comprising: (a) mixing a whitening agent, silicone adhesive and carrier fluid to form a homogenous mixture; (b) adding a peroxide complex to said homogenous mixture, wherein said complex comprises hydrogen peroxide and an N-vinyl heterocyclic polymer; and (c) mixing under vacuum.

## Claims

### Claim 1

A process for making an oral care composition, comprising:
(a) preparing a peroxide complex comprising hydrogen peroxide and an N-vinyl heterocyclic polymer, wherein preparing the peroxide complex comprises the step of combining a suspension of the polymer in an anhydrous organic solvent with an anhydrous solution of hydrogen peroxide;
(b) mixing a whitening agent, silicone adhesive and carrier fluid to form a homogenous mixture;
(c) adding the peroxide complex to said homogenous mixture; and
(d) mixing under vacuum.

### Claim 2 (depends on 1)

The process according to claim 1, wherein said polymer comprises poly-N-vinyl poly-2-pyrrolidone.

### Claim 3 (depends on 2)

The process according to claim 2, wherein said peroxide complex comprises said hydrogen peroxide and said polymer in about a 1:1 molar ratio.

### Claim 4 (depends on 1)

The process according to claim 1, wherein said carrier fluid further comprises a material selected from the group consisting of adhesion agents, surfactants, peroxide activators, solvents, flavorants, sweeteners, colorants, and mixtures thereof.

### Claim 5 (depends on 1)

The process according to claim 1, wherein said carrier fluid comprises a silicone polymer selected from the group consisting of silicone adhesives, silicone elastomers, silicone fluids, silicone resins, silicone gums and mixtures thereof.