Composition with a color to indicate coverage

• US 8,236,744 B2
• Filed: 11/11/2008
• Issued: 08/07/2012
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: Company-Palmolive Company
• Original Assignee: Colgate-Palmolive Company
• Inventors: Boyke, Christine, Holerca, Marian N.
• Primary Examiner(s): Hardee, John
• Application Number:
  US12/527,225
• Publication Number:
  US 20110182826A1
• Time in Patent Office: 1,365 Days
• Field of Search: 510/138
• US Class Current: 510/138
• CPC Class Codes: A61K 2800/42 Colour properties
• CPC Class Codes: A61K 2800/45 Colour indicators, e.g. pH- or Redox indicators
• CPC Class Codes: A61K 2800/52 Stabilizers
• CPC Class Codes: A61K 2800/522 Antioxidants; Radical scavengers
• CPC Class Codes: A61K 8/35 Ketones, e.g. benzophenone
• CPC Class Codes: A61K 8/498 having 6-membered rings or their condensed derivatives, e.g. coumarin
• CPC Class Codes: A61K 8/602 Glycosides, e.g. rutin
• CPC Class Codes: A61K 8/676 Ascorbic acid, i.e. vitamin C
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations

Abstract

A composition comprising at least one indicator, at least one light stabilizer, and at least one antioxidant. The composition is useful as a cleanser that provides a usage timer based on color change to indicate to a person that sufficient time has elapsed for cleansing.

Claims

1. A method comprising applying an indicator composition to a desired area of a substrate, wherein the applying is conducted until the desired area is covered as detected by a color of the composition covering the desired area, and wherein the composition comprises:

a. at least one indicator selected from litmus and carminic acid;

b. a light stabilizer comprising sodium ascorbate; and

c. an antioxidant comprising benzophenone-4.

2. The method of claim 1, wherein the composition has a second light absorption value after 13 weeks at 49°

C. that is no more than 20% different from a first light absorption value that is measured initially according to a UV-Vis spectrometer test for a peak absorption for the indicator.

3. The method of claim 1, wherein the indicator is present in an amount of 0.01 to 10% by weight in the composition.

4. The method of claim 1, wherein the light stabilizer is present in an amount of 0.01 to 1% by weight in the composition.

5. The method of claim 1, wherein the antioxidant is present in an amount of 0.01 to 0.1% by weight in the composition.

6. The method of claim 1, wherein the composition further comprises a surfactant.

7. The method of claim 1, wherein the composition comprises:

a. 0.01 to 1% by weight litmus,

b. 0.05 to 1% by weight sodium ascorbate, and

c. 0.05 to 0.1% by weight benzophenone-4.

8. The method of claim 1, wherein the composition comprises:

a. about 0.5 weight % litmus,

b. about 0.25 weight % sodium ascorbate, and

c. about 0.05 weight % benzophenone-4.

9. The method of claim 1, wherein the composition further comprises glycerin.

10. The method of claim 1, wherein the composition comprises:

a. 0.01 to 1% by weight litmus,

b. 0.05 to 1% by weight sodium ascorbate,

c. 0.05 to 0.1% by weight benzophenone-4;

d. glycerin in an amount up to 5% by weight; and

e. a surfactant.

11. The method of claim 1, wherein a color change is observed before about 2 minutes.

12. The method of claim 1, wherein a color change is observed at a time between 1 second to 30 minutes.