Compositions suitable for the treatment of hair comprising chelants and methods for reducing oxidative hair damage

• US 20040086475A1
• Filed: 09/22/2003
• Published: 05/06/2004
• Est. Priority Date: 03/20/2001
• Status: Active Grant

• Current Assignee: Wella Operations US LLC
• Original Assignee: The Procter & Gamble Company
• Inventors: Park, John Scott, Olshavsky, Michael Andrew, Boswell, Henry Drummond, Marsh, Jennifer Mary
• Granted Patent: US 7,186,275 B2
• Time in Patent Office: Days
• US Class Current: 424/70.2
• CPC Class Codes: A61K 2800/51 Chelating agents
• CPC Class Codes: A61K 8/44 Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• CPC Class Codes: A61Q 5/04 Preparations for permanent waving or straightening the hair
• CPC Class Codes: A61Q 5/08 Preparations for bleaching the hair
• CPC Class Codes: A61Q 5/10 Preparations for permanently dyeing the hair

Abstract

The present invention relates to hair care compositions comprising an oxidizing agent and chelants having $\frac{\log K_{\mathrm{CuL}}}{\log K_{\mathrm{CaL}}}$

ratio calculated at pH 10 of at least 3.20 wherein log K_CuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu²⁺ and log K_CaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca²⁺. Suitable chelants are diamine-N,N′-dipolyacids or monoamine monoamide-N,N′-dipolyacids. The compositions according to the present invention contribute to reducing the oxidative damage sustained by a keratinous fiber such as hair during bleaching, dyeing, perming or other oxidative treatments. Especially preferred diamine dipolyacid is ethylenediamine-N,N′-disuccinic acid (EDDS).

Claims

1. A composition suitable for treating hair comprising:

a) an oxidizing agent; and

b) a chelant (L) having a

$\frac{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CuL}}}{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CaL}}}$

ratio calculated at pH 10 of at least about 3.20;

wherein log K_CuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu²⁺ and log K_CaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca²⁺.

2. A composition according to claim 1, wherein said chelant has a Hydrogen Peroxide Decomposition Ratio (% Loss) of less than about 3.5% as measured by the Hydrogen Peroxide Decomposition Ratio Measurement Protocol, as described herein.

3. A composition according to claim 1, wherein said chelant forms a hexadendate complex with Cu²⁺.

4. A composition according to claim 1, wherein the pH of the composition is between about 8 and about 12.

5. A composition according to claim 1, wherein said composition is in the form of an oil-in-water emulsion.

6. A composition according to claim 1, wherein said composition is in the form of a thickened aqueous solution.

7. A composition according to claim 1, wherein said oxidizing agent is present at a level of from about 0.1% to about 40% by weight of said composition and is selected from water-soluble oxidizing agents and mixtures thereof.

8. A composition according to claim 7, wherein said oxidizing agent comprises hydrogen peroxide.

9. A composition according to claim 1, wherein said chelant is present at a level of from about 0.01% to about 10% by weight of said composition.

10. A composition according to claim 1, further comprising at least one oxidative hair dye precursor.

13. A kit for dyeing hair comprising a first and a second compositions packaged in different containers, wherein said first composition comprises an oxidizing agent and said second composition comprises an oxidative dye precursor, wherein the resulting mixture of said first and second compositions is a composition according to claim 10.

14. A method of dyeing human hair, said method comprising the steps of:

i) mixing the first and second composition of a kit according to claim 13;

ii) contacting hair with the mixture obtained on step i);

iii) massaging said mixture into hair;

iv) retaining said mixture on the hair for an amount of time sufficient for mixture to dye the hair;

iv) rinsing off said composition with water.

11. A method of treating hair, said method comprising the steps of:

i) contacting hair with a first composition comprising a chelant (L) having a

$\frac{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CuL}}}{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CaL}}}$

ratio calculated at pH 10 of at least about 3.20; and

ii) contacting hair with a second composition comprising an oxidizing agent immediately after step i);

wherein log K_CuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu²⁺ and log K_CaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca²⁺.

12. A method of treating hair, said method comprising the steps of:

i) contacting hair with a first composition comprising an oxidizing agent;

ii) contacting hair with a second composition comprising a chelant having a

$\frac{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CuL}}}{\log <br><br>\text{\hspace{1em}<br><br>}<br><br>K_{\mathrm{CaL}}}$

ratio calculated at pH 10 of at least about 3.20; and

iii) contacting hair with a third composition comprising a second oxidizing agent;

wherein steps i) and iii) are separated by at least 1 day and step ii) does not take place immediately before step iii); and

wherein log K_CuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu²⁺ and log K_CaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca²⁺.