Film forming containing compositions comprising polyvinyl acetate and a pigment

Patent metadata

Field	Value
Publication number	US-9827171-B2
Application number	US-201315107577-A
Country	US
Kind code	B2
Filing date	Dec 23, 2013
Priority date	Dec 23, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

Described herein are compositions comprising a film, wherein the film comprises a pigment, and is adapted to release the pigment at a specific point in time during use; and methods of making and using the same.

First claim

The invention claimed is:

1. An oral care composition comprising:
(i) flakes of a water soluble or dissolvable single layer film comprising
(a) film forming polymers in the form of a single layer polymer matrix comprising hydroxyalkyl cellulose and polyvinyl acetate; and
(b) a pigment entrained in the polymer matrix, and

(ii) an orally acceptable carrier vehicle,
wherein the composition comprises between about 20 and up to 32% water;
and wherein the composition comprises between about 25 and 50% glycerol.

2. The composition of claim 1 wherein the hydroxyalkyl cellulose is hydroxypropylmethyl cellulose.

3. The composition according to claim 1 , wherein the film further comprises a plasticizer selected from sorbitol, propylene glycol, and polyethylene glycol.

4. The composition according to claim 1 , wherein the film comprises a polysorbate.

5. The composition according to claim 1 , 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 presence of water.

6. The composition according to claim 1 wherein the average thickness of the film is 1.5-3 mil.

7. The composition according to claim 1 wherein the film forming polymers comprise hydroxypropylmethyl cellulose E5, hydroxypropylmethyl cellulose E50, and polyvinyl acetate.

8. The composition according to claim 1 , comprising, by dry weight of the film, 20-60% of hydroxypropylmethyl cellulose, 30-50% polyvinyl acetate; 10-30% propylene glycol; 1-5% polysorbate 80; and 15-30% pigment.

9. The composition according to claim 1 which is stable upon storage at about room temperature for 1 month, 2, months, 3 months, 6 months, 1 year or 2 years.

10. The composition of claim 1 , which comprises a clear gel toothpaste, wherein the pigment is released from said first film after brushing for a period of 30 to 120 seconds.

11. The composition of claim 1 comprising 22 to 28% of water.

12. A method of cleaning the teeth comprising brushing with a composition according to claim 1 , wherein brushing is continued until the film releases substantially all of the pigment; thereby providing a color signal to the user of adequate brushing.

Assignees

• Colgate Palmolive Co

Inventors

• Patel Neeta A
• Szewczyk Gregory
• Jogun Suzanne

Classifications

• A61K8/0254 Primary

  Platelets; Flakes · 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

• A61K2800/262

  Transparent; Translucent · CPC title

• A61K8/731

  Cellulose; Quaternized cellulose derivatives · CPC title

• A61K8/042

  Gels · CPC title