Hair treatment composition

Abstract

A hair treatment composition comprising (a) from 0.01 to 10 wt % of surfactant in a solvent, by weight of the total composition, and (b) a mixture of amino acids, wherein the mixture of amino acids comprises glutamic acid, alanine and proline gives damage repair benefits to chemically damaged hair.

Claims

1. A hair treatment composition comprising: (a) from 0.01 wt % to 10 wt % of surfactant in a solvent comprising water, by weight of the total composition, wherein the surfactant forms a dispersion of micelles in the solvent, and (b) a mixture of amino acids, wherein the mixture of amino acids consists of glutamic acid, alanine and proline, and wherein the mixture is free from other amino acids; wherein: the mixture of amino acids has a weight ratio of glutamic acid:alanine:proline of 2:1:1 to 1:2:1 to 1:1:2; the amount of the mixture of amino acids is from 0.1 wt % to 10 wt % by weight of the total hair composition; and the surfactant is selected from the group consisting of sodium oleyl succinate, ammonium lauryl sulphosuccinate, sodium lauryl sulphate, sodium lauryl ether sulphate, sodium lauryl ether sulphosuccinate, ammonium lauryl sulphate, ammonium lauryl ether sulphate, sodium dodecylbenzene sulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium lauryl isethionate, lauryl ether carboxylic acid, sodium N-lauryl sarcosinate, coco mono- or di-ethanolamide, coco mono-isopropanolamide, lauryl amine oxide, cocodimethyl sulphopropyl betaine, lauryl betaine, cocamidopropyl betaine and sodium cocoamphoacetate.

2. The hair treatment composition as claimed in claim 1, wherein the surfactant is selected from sodium lauryl ether sulphate, cocamidopropyl betaine and mixtures thereof.

3. The hair treatment composition as claimed in claim 1, wherein the surfactant is present in an amount of from 0.5 wt % to 2.5 wt % by weight of the total hair composition.

4. The composition as claimed in claim 1, wherein the composition has a pH in the range of from 3 to 6.

5. A method of treating chemically damaged hair comprising the step of applying to the hair a treatment composition comprising: (a) from 0.01 wt % to 10 wt % of surfactant in a solvent comprising water, by weight of the total composition, wherein the surfactant forms a dispersion of micelles in the solvent, and (b) a mixture of amino acids, wherein the mixture of amino acids consists of glutamic acid, alanine and proline, and is free of other amino acids; wherein: the mixture of amino acids has a weight ratio of glutamic acid:alanine:proline of 2:1:1 to 1:2:1 to 1:1:2; the amount of the mixture of amino acids is from 0.1 wt % to 10 wt % by weight of the total hair composition; and the surfactant is selected from the group consisting of sodium oleyl succinate, ammonium lauryl sulphosuccinate, sodium lauryl sulphate, sodium lauryl ether sulphate, sodium lauryl ether sulphosuccinate, ammonium lauryl sulphate, ammonium lauryl ether sulphate, sodium dodecylbenzene sulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium lauryl isethionate, lauryl ether carboxylic acid, sodium N-lauryl sarcosinate, coco mono- or di-ethanolamide, coco mono-isopropanolamide, lauryl amine oxide, cocodimethyl sulphopropyl betaine, lauryl betaine, cocamidopropyl betaine and sodium cocoamphoacetate.

6. The method as claimed in claim 5, wherein the chemically damaged hair is damaged by bleaching treatments, colouring treatments, straightening treatments, relaxing treatments, surfactant treatments, hot water from 20° C. to 45° C., and mixtures thereof.

7. The method as claimed in claim 5, further comprising the step of repeating the application of the composition to the hair.

8. The method as claimed in claim 7, wherein the step of repeating the application of the composition to the hair is made during a later treatment and is repeated 1 to 10 times.

9. The composition of claim 1, wherein the weight ratio of glutamic acid:alanine:proline of 1:1:1.

10. The composition of claim 1, wherein the mixture of amino acid is from 0.2 wt % to 5 wt % by total weight of the composition.

11. The composition of claim 1, wherein the mixture of amino acid is from 0.25 wt % to 2.5 wt % by total weight of the composition.

12. The composition of claim 1, wherein the composition further comprises an adjunct material selected from the group consisting of fragrances, dyes, pigments, pH adjusting agents, pearlescers, opacifiers, viscosity modifiers, preservatives, and antimicrobials.

13. The method of claim 5, wherein the composition further comprises an adjunct material selected from the group consisting of fragrances, dyes, pigments, pH adjusting agents, pearlescers, opacifiers, viscosity modifiers, preservatives, and antimicrobials.

Description

EXAMPLES

(1) Example 1—Preparation of Composition 1 in Accordance with the Invention and Comparative Composition A.

(2) Composition 1 and A were prepared by mixing the ingredients given in Table 1 below together under ambient conditions in the amounts shown until fully dispersed.

(3) The compositions are shown in Table 1 below.

(4) TABLE-US-00001 TABLE 1 Composition of Composition 1 and A. Amount (wt % of 100% active) Ingredient Composition 1 Comparative A Water To 100 To 100 Sodium Lauryl Ether 1.6 1.6 Sulphate (SLES) Glutamic acid 0.3 — Alanine 0.3 — Proline 0.3 —

Example 2: Measurement of the Denaturation Temperatures and Change in Denaturation Temperature of Hair, Using Differential Scanning Calorimetry (DSC), to Give an Indication of the Level of Damage in Hair Treated with Composition 1 and Water Alone

(5) The internal protein of damaged hair typically has a reduced denaturation temperature compared to that of virgin hair. Damage repair is evidenced by an increase in the denaturation temperature of the internal protein of hair.

(6) The Hair

(7) Double-Bleached:

(8) Hair tresses were bleached according to the following protocol. Hair was bleached twice for 30 minutes with Platine Precision White Compact Lightening Powder (L'Oreal Professionnel Paris, Paris, France) mixed with 9% cream peroxide, 30 ‘Vol’ (Excel GS Ltd, UK) (60 g of powder mixed with 120 g cream peroxide). Hair was then washed with 14% SLES solution after the second treatment before drying.

(9) Treatment of the Hair

(10) Hair was given a preliminary wash as follows:

(11) Hair was immersed in water for 30 s before being immersed in 14% aq sles solution. The hair was rubbed for 30 s, rinsed for 30 s and then treated with a non-conditioning shampoo, using 0.1 ml/1 g hair, with rubbing for 30 s and rinsing for 30 s.

(12) The hair (double bleached) was then treated with the compositions as detailed in Example 1 above, using the following method and 5 switches for each treatment.

(13) Hair was immersed in Compositions 1 and A for 40 min and removed, and squeezed between fingers to remove the excess.

(14) The hair tresses were then left to dry overnight at 20° C. at 50% relative humidity.

(15) The effect of the treatments was measured using Differential Scanning calorimetry (DSC).

(16) The bottom 2 cm of the treated hair switches was removed using scissors. The hair was then chopped small using hair clippers. 7-10 mg of the clippings were added to the aluminium pans of the calorimeter, along with 50 μL of water. In all cases 5 hair switches were used per treatment and 1 pan was prepared per hair switch. The prepared pans were allowed to sit overnight before being run on the DSC from 100-180° C., at a rate of 5° C./min.

(17) TABLE-US-00002 TABLE 5 Mean denaturation temperatures for double bleached hair treated with Composition 1 and Comparative composition A. Statistical Grouping Denaturation Standard Student's t-Test Treatment Temperature Deviation (p value) Composition 1 149.61 0.385 <0.0001 Composition A 145.49 0.314 <0.0001

(18) It will be seen that damage repair, shown by an increase in the denaturation temperature, occurs with treatment by the compositions in accordance with the invention.