COSMETIC COMPOSITION

Abstract

The present invention relates to a cosmetic composition comprising between 20 and 45% of a first surfactant, from 0.1 and 22% of a second surfactant; and cosmetically acceptable adjuvants for use in hair cleaning and color maintenance of dyed hair, which can be used as a shampoo and other hair formulations.

Claims

1. A cosmetic composition comprising between 20 and 45% of a first surfactant, between 0.1 and 22% of a second surfactant; and at least one cosmetically acceptable adjuvant.

2. The composition according to claim 1, wherein the surfactant is selected from the group consisting of sodium lauryl ether sulfate (SLES), sodium lauryl ether sulfosuccinate, cocamidopropyl betaine, lauryldimethylamine oxide or a mixture thereof.

3. The composition according to claim 1, wherein the first surfactant is sodium lauryl ether sulfate (SLES) and the second surfactant is selected from the group consisting of: sodium lauryl ether sulfosuccinate, cocamidopropyl betaine, lauryldimethylamine oxide or a mixture thereof.

4. The composition according to claim 1, wherein the cosmetically acceptable adjuvant is selected from the group consisting of a diluents, a saponificant, a foaming agent, a rheology modifier, a pH regulator, a preservative, a scavenger, a fragrance and a mixture thereof.

5. The composition according to claim 1, wherein the composition comprises between 25 and 40% of the first surfactant, between 1.0 and 20% of the second surfactant; and the cosmetically acceptable adjuvant.

6. The composition according to claim 5, wherein the composition comprises between 26 and 38% of the first surfactant, between 1.2 and 18% of the second surfactant; and the cosmetically acceptable adjuvant.

7. The composition according to claim 2, wherein the first surfactant is sodium lauryl ether sulfate (SLES) and the second surfactant is selected from the group consisting of: sodium lauryl ether sulfosuccinate, cocamidopropyl betaine, lauryldimethylamine oxide or a mixture thereof.

8. The composition according to claim 2, wherein the composition comprises between 25 and 40% of the first surfactant, between 1.0 and 20% of the second surfactant; and the cosmetically acceptable adjuvant.

9. The composition according to claim 3, wherein the composition comprises between 25 and 40% of the first surfactant, between 1.0 and 20% of the second surfactant; and the cosmetically acceptable adjuvant.

10. The composition according to claim 8, wherein the composition comprises between 26 and 38% of the first surfactant, between 1.2 and 18% of the second surfactant; and the cosmetically acceptable adjuvant.

11. The composition according to claim 9, wherein the composition comprises between 26 and 38% of the first surfactant, between 1.2 and 18% of the second surfactant; and the cosmetically acceptable adjuvant.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to obtain a full and complete view of the object of the invention in question, the object of the patent application has drawings, which are referenced as follows:

[0013] FIG. 1 is a graph of color loss measurement by using the composition A compared to the control composition.

[0014] FIG. 2 is a graph of color loss measurement by using the composition B compared to the control composition.

[0015] FIG. 3 is a graph of color loss measurement by using the composition C compared to the control composition.

[0016] FIG. 4 presents a washing hair test: 4Acomposition A; 4Bcontrol.

[0017] FIG. 5 presents a foaming test: 5Acomposition A; 5Bcontrol.

[0018] FIG. 6 presents a washing hair test: 6Acomposition B; 6Bcontrol.

[0019] FIG. 7 presents a foaming test: 7Acomposition B; 7Bcontrol.

[0020] FIG. 8 presents a washing hair test: 8Acomposition C; 8Bcontrol.

[0021] FIG. 9 presents a foaming test: 9Acomposition C; 9Bcontrol.

[0022] FIG. 10 is the graph showing the potential cytotoxic test of composition A compared to the control composition.

[0023] FIG. 11 is the graph showing the potential cytotoxic test of composition B compared to the control composition.

[0024] FIG. 12 is the graph showing the potential cytotoxic test of composition C compared to the control composition.

DETAILED DESCRIPTION OF THE INVENTION

[0025] This invention refers to a cosmetic composition comprising between 20 and 45% of a first surfactant, between 0.1 and 22% of a second surfactant; and cosmetically acceptable adjuvants for use on dyed hair hygiene and color maintenance of dyed hair strands.

[0026] For cosmetic composition purposes of this invention, the quantitative limits of its components are expressed as percentage by weight of the component in the final composition (% w).

[0027] The surfactants of this invention are sodium lauryl ether sulfate (SLES), sodium lauryl ether sulfosuccinate, cocamidopropyl betaine, lauryldimethylamine oxide, or a mixture thereof.

[0028] Preferably, the first surfactant is sodium lauryl ether sulfate (SLES) and the second surfactant belongs to the group consisting of: sodium lauryl ether sulfosuccinate, cocamidopropyl betaine, lauryldimethylamine oxide or a mixture thereof.

[0029] The cosmetically acceptable adjuvants are diluents, saponificant, foaming agents, emollients, rheology modifiers, pH regulators, scavengers, fragrance and others. One person skilled in the art would find obvious adding adjuvants in a minimum or enough amount to make up the cosmetic composition, without interfering, improving, withdrawing or reducing the effect of color maintenance of the dyed hair strands.

[0030] Among the adjuvants that may be used in the present invention, sorbeth-450 tristearate (mixture of triester of stearic acid and polyethylene glycol ester of sorbitol in 450 moles of ethylene oxide), water, PEG-cocoate, PEG-32 distearate and PEG-175 distearate may be used in the present invention, in a non-limiting manner.

[0031] Preferably, the cosmetic composition comprises between 25 and 40% of a first surfactant, between 1.0 and 20% of a second surfactant; and cosmetically acceptable adjuvants known to a person skilled in the art.

[0032] More preferably, the cosmetic composition of the invention comprises between 26 and 38% of a first surfactant, between 1.2 and 18% of a second surfactant; and cosmetically acceptable adjuvants known to a person skilled in the art.

[0033] The present invention further relates to the use of the cosmetic composition for dyed hair hygiene and color maintenance, as a shampoo. The shampoos of the present invention are for household and professional use, which can be used in daily or phased washing schemes.

[0034] Table 1 below indicates possible modes of the composition, that were obtained within the quantitative limits set out above.

TABLE-US-00001 COMPOSITION 1st SURFACTANT 2nd SURFACTANT A Sodium lauryl Sodium lauryl ether ether sulphate sulfosuccinate B Sodium lauryl Cocamidopropyl ether sulphate Betaine C Sodium lauryl Lauryldimethylamine ether sulphate oxide All compositions additionally have, as ingredients: rheology and pH modifiers, preservatives, scavengers and fragrance.

[0035] All compositions listed in table 1 are effective in promoting hair and scalp cleaning, and are able to keep the coloring of dyed hair even after a large number of washes, such as, for example, 30 washes, when compared with a washing control composition.

[0036] Although the invention has been widely described, one person skilled in the art would find obvious that many changes and modifications may be made without covering said modifications by the scope of the invention.

[0037] The examples below are merely illustrative of the embodiments of the invention, and should not be used to limit the holder rights, who should stick only to the attached set of claims.

EXAMPLES

Example 1Statistical Analysis

[0038] Exploratory data analysis was carried out (abstract graphic and measures). The times, for each treatment, were compared to T0 through ANOVA followed by a Dunnett's test. The treatments were compared using the Student t test for independent samples with 95% confidence level. For statistical analysis, we used MINITAB 14 and XLSTAT 2013 software.

[0039] The analyses of statistical data were employed for preparing the charts described in the examples below.

Example 2Tested Compositions

[0040] The following shampoo compositions were produced and are herein described both qualitatively and quantitatively, according to the description given above.

TABLE-US-00002 Concentration COMPOSITION (% by weight) A - Sodium lauryl ether 27 sulfate Sodium lauryl ether 17 sulfosuccinate B - Sodium lauryl ether 29 sulfate Cocamidopropyl Betaine 12 C - Sodium lauryl ether 35 sulfate Lauryldimethylamine oxide 1.5 ADDITIONAL COMPONENT IN ALL COMPOSITIONS ABOVE Sorbeth-450 tristearate + 1 water + PEG-9 cocoate + PEG-32 distearate + PEG- 175 distearate. Water q.s.p. Other ingredients .sup.1 q.s.p. Note .sup.1 For all formulas, the other ingredients are: rheology and pH modifiers, preservatives, scavengers and fragrance.

Example 3Evaluation of Loss of Hair Color

[0041] The evaluation of color loss in staples was carried out throughout 30 washes, reported as (%) in relation to the initial color. The smaller the value, the greater is the color maintenance.

[0042] The graph of FIGS. 1, 2 and 3 show the color maintenance of the dyed hair even after 30 washes comparing, respectively, the compositions A, B and C in the control formula with (%) in relation to T0 by treatment.

[0043] The data of these figures show that shampoos made with different compositions of the present invention protect more coloring of strands, from the first to last wash, when compared with the control compositions.

[0044] It can be seen in FIG. 4 that the staples, after 30 washes, has a color better and longer, even as a function of time of use of the shampoo composition A, which does not occur with the hair washed with control shampoo. The same procedure was performed with the shampoos of composition B (FIG. 6) and composition C (FIG. 8), giving a result identical to that achieved by composition A.

[0045] It can be further noticed, in FIGS. 5, 7 and 9, that the shampoos of the invention generate a creamier and abundant foam when compared to the control. This attribute is fairly valued and is associated with well-being feeling. The sensory provided by rich foam refers to a perception of a better performance by the consumer.

Example 4In Vitro Irritation Potential

[0046] Evaluation of cytotoxic potential by Balb/C 3T3 NRU method, according to ISO 10993-5 and INVITTOX No. 46 protocol.

[0047] An in vitro comparative study of the irritation potential of the shampoos of this invention are presented, respectively, in FIGS. 10, 11 and 12, and the results show that these compositions are less cytotoxic and softer than the control. The assay showed a deviation between the replicas of nearly 10%.