# US 10,307,363 B2 · Oral care compositions with improved rheology

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- Number: US 10,307,363 B2
- Document ID: US10307363B2
- Status: Granted
- Kind: B2
- Application number: 15/399,773
- Filed: 2017-01-06
- Published: 2017-05-11
- Granted: 2019-06-04
- Earliest claimed: 2011-09-01
- Assignees: The Procter & Gamble Company
- Applicants: The Procter & Gamble Company
- Inventors: Steven Carl Burgess; Ayowumi O. Fatade
- Web page: https://patentgrep.com/patent/US10307363B2

## CPC

- A61K 8/86: Polyethers
- A61K 8/19: containing inorganic ingredients
- A61K 8/21: Fluorides; Derivatives thereof
- A61K 8/22: Peroxides; Oxygen; Ozone
- A61K 8/24: Phosphorous; Compounds thereof
- A61K 8/25: Silicon; Compounds thereof
- A61K 8/345: {containing more than one hydroxy group}
- A61K 8/463: {containing sulfuric acid derivatives, e.g. sodium lauryl sulfate}
- A61K 8/55: Phosphorus compounds
- A61K 8/69: containing fluorine
- A61Q 11/00: Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
- A61K 2800/28: Rubbing or scrubbing compositions; Peeling or abrasive compositions; Containing exfoliants
- A61K 2800/31: Anhydrous
- A61K 2800/594: Mixtures of polymers
- A61K 2800/92: Oral administration
- 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

A dentifrice composition containing a polyethylene glycol having an average molecular weight of from about 3,000 to about 8,000, glycerin, precipitated silica, and a fluoride source. The polyethylene glycol forms a crystalline structure in the composition and the composition has a water activity from about 0.25 to about 0.46 measured at about 22° C.

## Claims

### Claim 1

A dentifrice composition comprising:
a. a polyethylene glycol having an average molecular weight of from about 3,000 to about 8,000;
b. from about 29% to about 44%, by weight of the composition, glycerin;
c. an abrasive silica; and
d. from about 5% to about 12%, by weight of the composition, water;
e. a fluoride source selected from the group consisting of stannous fluoride, sodium fluoride, sodium monofluorophosphate, and mixtures thereof;
wherein the polyethylene glycol forms a crystalline structure in the composition and wherein the composition has a water activity from about 0.25 to about 0.46 measured at about 22° C.; and
wherein the abrasive silica has an average particle size ranging between about 0.1 to about 30 microns.

### Claim 2 (depends on 1)

The dentifrice composition of claim 1, wherein the abrasive is a precipitated silica.

### Claim 3 (depends on 1)

The dentifrice composition of claim 1 further comprising from about 0.25% to about 7%, by weight of the composition, polyethylene glycol.

### Claim 4 (depends on 1)

The dentifrice composition of claim 1 comprising from about 50 ppm to about 3500 ppm of the fluoride source.

### Claim 5 (depends on 1)

The dentifrice composition of claim 1 further comprising sodium polyphosphate.

### Claim 6 (depends on 1)

The dentifrice composition of claim 1 further comprising propylene glycol.

### Claim 7 (depends on 1)

The dentifrice composition of claim 1 further comprising from about 0% to about 1.5% by weight of the composition, of a viscosity modifier selected from gums, binders, cellulosic thickeners, and combinations thereof.

### Claim 8 (depends on 1)

A method of making the dentifrice composition of claim 1 wherein the polyethylene glycol is added to the composition in solution with solvent or is added in a controlled manner as a molten material to the composition at a temperature less than about 35° C. and with turbulent mixing or vigorous agitation.