WO2020103069A1

WO2020103069A1 - A Cosmetic Cleansing Composition

Info

Publication number: WO2020103069A1
Application number: PCT/CN2018/116893
Authority: WO
Inventors: Mingjia LI; Zebao JIA; Zhaoxia Bao; Chaochun Dong; Ji Feng
Original assignee: Beiersdorf Daily Chemical Wuhan Co Ltd; Beiersdorf AG
Current assignee: Beiersdorf Daily Chemical Wuhan Co Ltd; Beiersdorf AG
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2020-05-28
Anticipated expiration: 2021-05-22
Also published as: WO2020104129A1

Abstract

A mild and clear cosmetic cleansing composition is disclosed. The cleansing composition, especially shampoo, contains a surfactant system, comprising an amino acid based surfactant and at least one amphoteric polymer, preferable polyquaternium-47. The composition advantageously is sulfate- and silicone-free. The composition has a constant consistency and a sufficient long term stability, and provides good combability to hair.

Description

A Cosmetic Cleansing Composition

Technical Field

The present invention belongs to the cosmetic field, and it is directed to a mild and clear cosmetic cleansing composition, especially a shampoo composition, containing a surfactant system, comprising at least one amino acid based surfactant, and at least one amphoteric polymer, preferably Polyquaternium-47, the composition advantageously being sulfate-and silicone-free.

Background Art

The main purpose of a shampoo for cleansing hair is to remove dirt. Dirt may be composed of external components, such as dust particles, which were deposited on hair and scalp or residues of styling and conditioning compositions, as well as lipids and dead cell materials, which are originated from the scalp and hair itself. By the aid of surfactants in the cleansing compositions, the components of the dirt are solubilized and removed from the surface of hair and skin during rinsing off.

For a long time the surfactant sodium laureth sulfate was the first and main choice for cleansing compositions. This surfactant has good cleansing properties and develops, optionally together with further surfactants, rich and stable foam. The incorporation of sodium laureth sulfate in cleansing products is well established and results in stable products, which build up a sufficient and relatively stable viscosity. This is advantageous in relation to a constant good removal of products from the packaging and a constant consistency of the products over the time period of storage, sale and usage.

Although in general the use of sodium laureth sulfate in cleansing products is without any problems, people having a sensitive skin, having dermatological problems or diseases or children and babies may suffer from irritative reactions following frequent use of cleansing products containing sodium laureth sulfate, especially when sodium laureth sulfate is contained in relatively high amounts. The irritative reactions lead to eyes, which may sting, and skin, which may itch.

Moreover, as the daily cleansing routine has changed, people are frequently taking a shower or a bath or cleansing their hair daily, resulting in the fact that they wish to have mild and gentle products becomes more and more prominent.

Hence, there is the need to replace sodium laureth sulfate as a main surfactant. This issue has already been addressed in prior art in numerous documents, from which only a few will be described in the following.

Although EP 2410979 B1 is directed to compositions free from components having poly ethylene glycol (PEG) residues, there is a disclosure of shampoo compositions, which are free from PEG and sulfate.

DE 102011003170 A1 discloses the use of alternative thickening agents in cosmetic preparations. However, the example compositions describe PEG-and sulfate-free compositions.

EP 2468842 B1 describes mild and clear cleansers, containing polyglyceryl nonionic surfactants. In addition, it is described that the anionic surfactants are non-sulfate surfactants. WO 2015/079026 A1 describes compositions free from sulfate surfactants and amphoteric surfactants.

EP 3145483 B1 discloses foaming compositions, which do not contain soaps and sulfate surfactants.

Also, WO 2016/093155 A1 discloses cleansing compositions free from anionic surfactants containing sulfate residues.

The same holds true for WO 2015/141699 A1.

US 9974726 B2 describes gentle cleansing compositions containing a taurate surfactant, an isethionate surfactant, a betaine and a nonionic emulsifier. Said surfactants were chosen, because sulfate surfactants should be eliminated.

US 2018/0116937 A1 discloses cleansing compositions free from sulfate surfactants and ethoxylated surfactants.

CN 106619162 A describes a mild cleansing composition containing surfactants in form of N-fatty acyl amino acid salts, fatty acid alkyl betaine and a thickening agent; the thickening agent being chosen from glycerol monolaurate, PEG-120 methyl glucose fatty acid, and coconut oil fatty acid monoethanolamide.

In general, the surfactants chosen as a replacement for sulfate surfactants, especially sodium laureth sulfate, are surfactants based on amino acids and/or surfactants containing residues of sulfonic acid.

The use of said alternative surfactants causes challenges in relation to the choice of thickening agents and conditioning agents.

Moreover, if clear shampoo compositions shall be provided, the conventional ingredients, such as natural oils and silicone oils, providing a conditioning and/or caring effect to hair, cannot be used because of their poor solubility and hence resulting in turbid preparations.

CN 106420423 A describes preparations containing amino acid foaming agents, in addition said preparations are free from silicone components. However, there is no disclosure of transparent preparations and how this could be achieved.

As the consumer likes clear compositions, especially for hair care, because clear compositions impart the impression to be a clean, pure, premium class product being good for the health of the hair.

Summary of the Invention

Therefore, it was the purpose of the present invention to provide a mild and clear cleansing composition, especially shampoo composition, which has a constant consistency and a sufficient long term stability. Said composition shall be sulfate-free. Moreover, the composition shall provide good combability to hair.

Surprisingly, it was found, that these requirements were met by a composition containing

● a surfactant system, comprising at least one amino acid based surfactant, and

● at least one amphoteric polymer, preferably Polyquaternium-47.

The composition is a cosmetic cleansing composition, especially a shampoo composition.

The composition is an aqueous composition and contains water in an amount of 30 to 90 % by weight, preferably 60 to 80 % by weight, in relation to the total weight of the composition.

In the meaning of the present invention sulfates are salts or esters of sulfuric acid. The salts are represented by the formulas SO ₄ ^2- (anion) and HSO ₄ ^2- (bisulfate anion) , whereas the esters have the formula R-O-SO ₂-O-R', wherein R and R'are organic residues and R'may be hydrogen. At respective pH-values sulfuric acid dissociates and salts are formed.

In the meaning of the present invention free from sulfates means that the respective raw material or the respective composition contains less than 0.1 % by weight, preferably less than 0.01 % by weight, and more preferably 0 % by weight of sulfate ions and/or sulfate esters in relation to the total weight of the raw material and/or in relation to the total weight of the composition.

Advantageously, the composition of the invention does not contain any surfactants having sulfate residues.

More advantageously, the total composition is free from any sulfate.

Silicones are synthetic components, mostly in form of polymers, containing silicium atoms connected via oxygen atoms. The functional unit mainly consisting of silicium atom and oxygen atom is called siloxane, has the general formula: R _nSiO _(4-n) _/2 (n=0, 1, 2, 3) .

According to the present invention, the composition is free from silicone components. The term “free from” is intended to mean a composition containing less than 0.1 % by weight, preferably less than 0.01 % by weight, more preferably 0.001 % by weight, most preferably 0 % by weight, of a respective compound, relative to the total weight of the composition.

According to the present invention, the surfactant system comprises at least one amino acid based surfactant, with the proviso that nonionic surfactants are not contained in the surfactant system.

Amino acid based surfactants are anionic surfactants. Advantageously, amino acid based surfactants are acyl amino acids (and their salts) , examples being presented in the following listing:

■ acyl glutamates, for example, sodium acyl glutamate, di-TEA-palmitoyl aspartate, and sodium caprylic/capric glutamate,

■ acyl peptides, for example, palmitoyl-hydrolyzed milk protein, sodium cocoyl-hydrolyzed soy protein, and sodium/potassium cocoyl-hydrolyzed collagen,

■ sarcosinates, for example, myristoyl sarcosine, TEA-lauroyl sarcosinate, sodium lauroyl sarcosinate, and sodium cocoyl sarcosinate,

■ alaninates,

■ glycinate.

According to the present invention, it is preferred, if the at least one acyl amino acid is chosen from sarcosinates, more preferably sodium lauroyl sarcosinate, which may be purchased as AMIN LS 30 or as AMIN LS30-NP, both from Guangzhou Tinci.

In the composition of the present invention the at least one amino acid based surfactant is contained in a total amount of 0.5 to 50.0 % by weight, preferably 9.0 to 40.0 % by weight, in relation to the total weight of the composition.

Advantageously, the surfactant system may additionally contain at least one alkyl or alkylamidopropyl betaine surfactant. Alkyl or alkylamidopropyl betaine surfactants are amphoteric surfactants containing anionic as well as cationic groups and behave accordingly in aqueous solution like anionic or cationic surfactants, depending on the pH value. In strongly acidic solutions, they have a positive charge and in alkaline solutions, a negative charge. On the other hand, they are zwitterionic at a neutral pH value, illustrated by the following example:

RNH ₂ ⁺-CH ₂-CH ₂-COOH X ^- (at pH=2) X ^-= any anion, for example, Cl ^-

RNH ₂ ⁺-CH ₂-CH ₂-COO ^- (at pH=7)

RNH-CH ₂-CH ₂-COO ^-B ⁺ (at pH=12) B ⁺ = any cation, for example Na ⁺.

It is preferred, if the at least one alkyl or alkylamido betaine surfactant is chosen from alkylamidopropyl betaine surfactants, more preferably lauramidopropyl betaine, which may be purchased as LAB-30K from Wuhan Double.

In the composition of the present invention the at least one alkyl or alkylamido betaine surfactant is contained in a total amount of 0.5 to 50.0 % by weight, preferably 7.0 to 30.0 % by weight, in relation to the total weight of the composition.

Advantageously, in the composition of the present invention sodium lauroyl sarcosinate and lauramidopropyl betaine are contained.

Advantageously, a thickening system comprising at least one nonionic surfactant and at least one highly ethoxylated fatty derivative may be contained in the composition of the present invention, with the proviso that nonionic surfactants are not contained in the surfactant system.

Nonionic surfactants may be characterized by polyether chains. Nonionic surfactants do not form ions in an aqueous medium. Besides their function as surfactants nonionic surfactants may have a thickening effect, depending on the surfactants and/or other components of the respective cleansing composition.

Nonionic surfactants which may be used according to the invention are

- Alkanol amides, such as cocoamides MEA/DEA/MIPA,

- Amine oxides, such as cocoamidopropylamine oxide,

- Esters that are formed by esterification of carboxylic acids with ethylene oxide, glycerin, sorbitan, or other alcohols, ethoxylated/propoxylated esters, ethoxylated/propoxylated glycerin esters, ethoxylated/propoxylated triglyceride esters

- Ethers, for example, ethoxylated/propoxylated alcohols (e.g., laureth-X, X being 2 to 10, wherein X represents ethylene oxide residues) , ethoxylated/propoxylatedcholesterines, ethoxylated/propoxylated lanolin, propoxylated POE ethers, and alkyl polyglycosides, such as lauryl glucoside, decyl glycoside, cocoglycoside,

- Sucrose esters, ethers,

- Polyglycerine esters, diglycerine esters,

- Methyl glucose esters, esters of hydroxy acids.

Preferably, the at least one nonionic surfactant is chosen from alkanol amides, more preferably from cocoamides MEA/DEA/MIPA. For example, cocamide MEA may be purchased as Uceomid CMEA from Guangzhou Startec.

In the composition of the present invention the at least one nonionic surfactant, preferably the at least one alkanolamide, more preferably the at least one cocamide, is contained in a total amount of 0.1 to 5.0 % by weight, preferably 0.5 to 2.5 % by weight, in relation to the total weight of the composition.

In the sense of the present invention on one hand highly ethoxylated fatty derivatives are esters of a fatty acid and a highly ethoxylated polyol. The fatty acid ester of an ethoxylated polyol may be a single fatty acid ester of an ethoxylated polyol or a mixture of such esters wherein each component of the mixture is a fatty acid ester of an ethoxylated polyol having a definite degree of ethoxylation and/or a definite degree of esterification. An ethoxylated polyol is any compound having at least 3 alcohol groups wherein the majority of the alcohol functionalities has been etherified with polyoxyethylene. Preferred alcohols are glycerine and glucose. On the other hand highly ethoxylated fatty derivatives are polyethylene glycol mono-or diester of fatty acids having 12 to 30 carbon atoms. In the sense of the present invention highly ethoxylated means that in average at least 50 ethylene glycol residues per molecule are contained. Examples of preferred highly ethoxylated fatty acid derivatives are PEG-150 Distearate, PEG-200 hydrogenated glyceryl palmate and PEG-120 methyl glucose dioleate. It is preferred, if the composition of the present invention contains PEG-120 methyl glucose dioleate, which may be purchased as Glucamate DOE-120 from Lubrizol Advanced Materials or purchased as Methyl Gluceth DOE 120 KC from KCl.

In the composition of the present invention the at least one highly ethoxylated fatty derivative is contained in a total amount of 0.1 to 5.0 % by weight, preferably 0.3 to 2.0 % by weight, in relation to the total weight of the composition.

Advantageously, in the composition of the present invention cocamide MEA and PEG-120 methyl glucose dioleate are contained.

To provide a mild cleansing composition besides the choice of a surfactant system comprising one or more mild surfactant (s) , additional components may be added to contribute to a conditioning and/or caring effect. The composition of the present invention contains a surfactant system comprising at least one amino acid based surfactant. The amino acid based surfactants are known to be up to seven times less harsh than conventional sulfate-based anionic surfactants. Therefore, by including a mild amino acid based surfactant the composition of the present invention is significantly less irritative than conventional sulfate surfactant containing compositions.

Moreover, a conditioning and caring effect should be provided by the composition of the present invention. As mentioned in the beginning, the conventional components for providing said effects, such as natural oils and silicones had to be avoided because of causing turbidity.

To end up with a really clear composition, components different from natural oils and silicones had to used. Promising candidates were cationic polymers and/or amphoteric polymers. Tests with compositions containing equal amounts of Polyquaternium-10, guar hydroxyl propyl trimonium chloride (cationic polymers) and amphoteric polymers revealed differences. The conditioning effect of compositions containing amphoteric polymers was evaluated better than the effect for those containing cationic polymers. Moreover, the transparency of some compositions was affected. If compositions containing Polyquaternium-10 or guar hydroxyl propyl trimonium chloride were exposed to air, the compositions turned turbid. Thus, the aim to provide a clear composition, which will stay clear over the time of storage, sale and especially usage, could not be achieved by compositions containing Polyquaternium-10 and guar hydroxyl propyl trimonium chloride. Only the compositions containing amphoteric polymers stayed clear, even after exposure to air.

According to the present invention, the composition may contain amphoteric polymers, preferably chosen from Polyquaternium-22, Polyquaternium-47, and Polyquaternium-53. Polyquaternium-22 may be purchased as Merquat 295, Polyquaternium-47 as Merquat 2001 polymer and Polyquaternium 53 as Merquat 2003, all from the company of Lubrizol.

Polyquaternium 47 and Polyquaternium 53 are characterized by the formulas shown below:

Polyquaternium 47:

Polyquaternium 53:

In the composition of the present invention the at least one amphoteric polymer is contained in an amount of 0.01 to 5.0 % by weight, preferably 0.02 to 2.0 % by weight, and more preferably 0.02 to 0.63 % by weight, in relation to the total weight of the composition and in relation to the active content.

The pH value of the compositions according to the present invention may be adjusted by all means suitable for cosmetic compositions. However, it is preferred, if suitable amounts of α-and β-hydroxycarboxylic acids such as citric acid, lactic acid, malic acid, and/or glycolic acid, are contained to adjust the pH value to a value from 4.5 to 7.0.

The cleansing composition of the present invention may further comprise one or more preservatives. Suitable preservatives to be comprised in the composition of the present invention are for example phenoxyethanol, ethylhexyglycerinmethylparaben, ethylparaben, benzyl alcohol, methylisothiazolinone, methyl chloroisothiazolinone and/or DMDM hydantoin.

If preservatives are contained in the composition of the present invention, the one or more preservatives are contained in an amount of 0.0001 to 0.2 % by weight, preferably 0.01 to 0.15 % by weight, in relation to the total weight of the composition.

Examples

The examples illustrating the present invention are not intended to limit the invention in any aspect. One skilled in the art should know that, changes and modifications may be carried out to technical solutions of the present invention within the spirit and scope of the present invention.

Example 1: Preparation

The composition of the present invention may be prepared by any technique known or effective to prepare a hair cleansing composition. The process to prepare the composition of the present invention comprises conventional formulating and mixing techniques. However, it is recommended to use the following process for preparation:

● Mix one or more amino acid based surfactants (e.g., Sodium Lauroyl Sarcosinate) and one or more alkyl or alkylamidobetaine surfactants (e.g., Lauramidopropyl Betaine) , one or more nonionic surfactants (e.g., Cocamide MEA) , one or more ethoxylated fatty derivative (e.g., PEG-120 Methyl Glucose Dioleate) and water;

● heat the mixture to 70-75℃ and stir until all solid components are dissolved;

● cool down to about 65℃;

● add one or more amphoteric polymers (e.g., Polyquaternium-47) and keep stirring;

● cool down to about 40℃;

● optionally add further components, such as e.g., perfume, solvents, pH adjusting agents, and preservative (s) ;

For manufacturing a batch of a composition according to the present invention, an IKA RW20 digital or IKA Eurostar stir equipment and a stirrer, e.g., a paddle stirrer, is used.

Table 1: Trade name and INCl of the compounds

Table 2: Composition Examples

The amounts given refer to raw material content.

Example 2: Evaluation

Test method

In order to show that the addition of amphoteric polymers, shown by the addition of Polyquaternium-47, to the inventive composition has an effect and contributes to the solution of the above-mentioned problem, a half head test is conducted. The test is carried out using the following procedure:

Compositions comprising Polyquaternium-47 at different concentrations ranging from 0.1 to 5.0 % by weight (raw material content, corresponding to 0.021; 0.105; 0.21; 0.315; 0.63; and 1.05 % by weight active content; Composition Examples 1 to 6) are prepared as samples of the present invention, and a blank shampoo is used as the comparative sample, which does not comprise any amphoteric polymer. Respective test samples are filled in syringes, not revealing any details of the compositions therein. Depending on the length of the hair, the amount of sample will be 3-5 ml.

A trained hairdresser starts with an initial assessment of the subject′s hair to be treated by evaluating and recording the condition of the subject′s hair.

Separate the hair of a subject from the middle of head, and clip up one side of the hair when the other side is treated. Wet the hair.

Put each sample in one hand, evaluate consistency of each sample. Spread each sample on hair, evaluate spreadability, foaming properties like richness, slippery and amount of foam.

Use the comparative sample to wash one side of the hair, and use one of the samples of the present invention to wash the other side. Stroke each side of head hair for 45s, and rinse the hair for 60s. The condition of the hair is not assessed during the washing procedure.

After rinsing for 3s -5s, assess the detangling and gliding properties (3s -5s) . After rinsing for 30s, assess the gliding properties (30s) and easiness to rinse out. Then wet both sides of the hair again, and cover the hair up with towels.

Towel the hair to remove the spare water. Comb the hair with wide tooth comb, and assess wet detangling properties. After this, comb the hair with fine tooth comb, and assess wet combability.

Assess the wet gliding, anti-roughness at the tips of the hair.

After leaving hair at room temperature for 5 minutes, assess the moisture property and give general comments on both sides.

Blow-dry the hair, and assess easiness to manage the hair in dry condition.

Comb the hair with wide tooth comb, assess the dry detangling properties. After this, comb the hair with fine tooth comb, and assess the dry combability.

Finally assess dry gliding, anti-roughness and shininess of the hair. Give general comment to both sides.

8 different people for each sample are evaluated by the trained hairdresser.

The evaluation is based on a 10-point system, "1 point" corresponds to "bad" , and "10 points" corresponds to "good" . A value of 5 points is a medium value, corresponding to sufficient qualities. The values of 9 to 6 points give descending values, making it possible to differentiate stepwise between good and sufficient. Correspondingly, the values of 4 to 2 points give descending values, making it possible to differentiate stepwise between sufficient and bad.

The test and evaluation results are shown in Table 3, wherein the average score based on the 8 evaluation scores is recorded for each sample.

Table 3: Results of half side tests in a hair salon (intern)

It becomes apparent from the analysis of the evaluation data shown in Table 3 that the addition of Polyquaternium-47 has a substantial effect. Nearly all compositions containing Polyquaternium-47 are evaluated better than those containing no amphoteric polymer. Looking for the best evaluations, the compositions containing 1.5 % and 3.0 % by weight (raw material content) of Polyquaternium-47 are mostly evaluated best. However, in nearly all cases, already the addition of 0.1 % by weight (raw material content) Polyquaternium-47 has an effect, resulting in an improvement of the analyzed properties. Referring to combability, the addition of Polyquaternium-47 results in an improvement of the combability of wet and dry hair, as shown in Table 3.

Example 3: Irritation

To prove that the compositions of the invention were milder than products actually being on the market a RBC assay was conducted.

RBC assay:

The cell membrane destroying and protein denaturating properties of test samples are examined by measuring the release of hemoglobin (hemolysis) and the spectral changes of hemoglobin (protein denaturation) from bovine erythrocytes.

Test Declaration:

The RBC test (1 hour) has been used within the EC/HO International Validation Study (Balls et al., 1995) and the COLIPA Validation Project on alternatives to the Draize eye irritation test (Brantom et al., 1997) . The test demonstrated its validity for the assessment of the in vivo eye irritation potential.

Short Description:

Range finding and denaturation:

Defined aliquots of bovine erythrocytes are incubated by shaking for one hour at room temperature with increasing concentrations of test sample (1, 10, 100, 1000, 10000, 100000 mg/l in PBS at pH 7.4) . After centrifugation the spectral absorption of released hemoglobin is determined photometrically at 541 nm in the resulting supernatants (extracellular hemoglobin) . The cells of the pellet are lysed with water and the spectral absorption of this solution (intracellular hemoglobin) is also determined at 541 nm.

The D _low (threshold concentration [mg/l] ＞ 10% denaturation) and the D _max (maximum denaturation [%] ) are calculated from the change of total hemoglobin absorption (intra-and extracellular) in comparison to the total native hemoglobin (HbO ₂) of the 100% control.

Hemolysis:

Defined aliquots of bovine erythrocytes are incubated in the same way as before with a series of narrow concentrations chosen from the results of the range finding experiment. After centrifugation the hemoglobin concentration of the resulting supernatants is determined photometrically on 541 nm and the relative hemolysis release is calculated. The H ₅₀ [mg/l] , indicating the concentration at which 50 % of the hemoglobin is released, is determined from the concentration-response curve.

Based on the H ₅₀ value, different prediction models for surfactants and surfactant-based formulations for the prediction of the eye irritation potential corresponding to the MMAS score of the Draize Eye Irritation Test were defined. The most relevant for this test of a raw material would be the prediction model for surfactants (prediction model 2.1, Pape et al., 1999) . The results of the COLIPA validation study suggest that in general H ₅₀ values ＞ 5,000 to 10,000 mg/I indicate that the test material is not or only minimally irritant to eyes.

Additional criteria to classify the eye irritation potential based on the protein denaturation were defined in the standard operating procedure. Accordingly, a maximal denaturation (D _max) ＞ 50% accompanied by a denaturation threshold value (D _low) of ≤ 10,000 mg/l a potential of severe eye irritation.

Table 4: Results

Listing of Benchmark product #1 (already being in the market) :

Aqua, Sodium Laureth Sulfate, Dimethicone, Lauramidopropyl Betaine, Glycol Distearate, Camellia Japonica Seed Oil, Hydrogen Peroxide, Soluble Collagen, Panthenol, Acrylates Copolymer, Cocamide MEA, Sodium Chloride, Stearyl Alcohol, Polyquaternium-10, Citric Acid, Cetyl Alcohol, DMDM Hydantoin, Guar Hydroxypropyltrimonium Chloride, Sodium Hydroxide, Sodium Lauryl Sulfate, Disodium EDTA, Methylchloroisothiazolinone, Methylisothiazolinone, Parfum.

Listing of Benchmark product #2 (already being in the market) :

Aqua, Ammonium Laureth Sulfate, Ammonium Lauryl Sulfate, Dimethicone, Theobroma Cacao (Cocoa) Extract, Camellia Japonica Seed Oil, GlycyrrhizaGlabra (Licorice) Root Extract, PinusSylvestris Leaf Extract, Panax Ginseng Root Extract, CnidiumOfficinale Root Extract, Cetyl Alcohol, Cocamide MEA, Tetrasodium EDTA, Trihydroxystearin, Zinc Pyriithione, Sodium Chloride, Guar Hydroxypropyltrimonium Chloride, Disodium EDTA, Sodium Benzoate, Di-C12-13 Alkyl Malate, Sodium Citrate, Cocamidopropyl Betaine, C12-15 Pareth-3, Magnesium Nitrate, Sodium Polynaphthalenesulfonate, Zinc Chloride, Alcohol, Methylchloroisothiazolinone, Cellulose Gum, Magnesium Chloride, Hydrolyzed Corn Starch, Methylisothiazolinone, Sodium Salicylate, Phenoxyethanol, Parfum.

It is apparent from the result table that the composition of the present invention (Composition Example 4) is evaluated milder than the products on the market. The L/D ratio of Composition Example 4 of the present invention is about 10 times better than the ratio for the products presently on the market.

Example 4: Stability

To evaluate the long term stability of the compositions of the present invention, Composition Examples 1 to 4, were evaluated in relation to phase separation, product performance, and transmittance. Respective samples of the Composition Examples were then kept at 45℃ for 2 months, at -10℃ for 1 month, and at 40℃ in front of a window (day light) for 8 months. After the respective time the compositions were evaluated in relation to the above mentioned properties again.

No composition did show any phase separation, the product performance did not change and the all compositions stayed clear.

Claims

A cosmetic cleansing composition containing

· a surfactant system, comprising at least one amino acid based surfactant, and

· at least one amphoteric polymer.
The cleansing composition according to claim 1, characterized in that the cosmetic cleansing composition is a shampoo composition.
The cleansing composition according to claim 1 or 2 characterized in that the composition contains water in an amount of 30 to 90%by weight, preferably 60 to 80 %by weight, in relation to the total weight of the composition.
The cleansing composition according to any of the preceding claims characterized in that the at least amino acid based surfactant is an acyl amino acid and/or the salt thereof.
The cleansing composition according to claim 4 characterized in that the at least one acyl amino acid and/or salts thereof is chosen from acyl sarcosinates, preferably sodium lauroyl sarcosinate.
The cleansing composition according to any of the preceding claims characterized in that the at least one amino acid based surfactant is contained in a total amount of 0.5 to 50.0%by weight, preferably 9.0 to 40.0 %by weight, in relation to the total weight of the composition.
The cleansing composition according to any of the preceding claims characterized in that the surfactant system additionally contains at least one alkyl or alkylamido betaine surfactant.
The cleansing composition according to claim 7 characterized in that the alkylamido betaine surfactant is lauramidopropyl betaine.
The cleansing composition according to claim 7 characterized in that the at least one alkyl or alkylamido betaine surfactant is contained in a total amount of 0.5 to 50.0 %by weight, preferably 7.0 to 30.0 %by weight, in relation to the total weight of the composition.
The cleansing composition according to any of the preceding claims characterized in that sodium lauroyl sarcosinate and lauramidopropyl betaine are contained in the surfactant system.
The cleansing composition according to any of the preceding claims characterized in that additionally a thickening system is contained comprising at least one nonionic surfactant and at least one highly ethoxylated fatty acid derivative.
The cleansing composition according to claim 11 characterized in that the at least one nonionic surfactant is at least one alkanolamide, preferably chosen from the cocamides MEA, DEA and/or MIPA.
The cleansing composition according to claim 11 or 12 characterized in that the at least one nonionic surfactant is contained in a total amount of 0.1 to 5.0 %by weight, preferably 0.5 to 2.5 %by weight, in relation to the total weight of the composition.
The cleansing composition according to claim 11 characterized in that the at least one highly ethoxylated fatty derivative is chosen from PEG-150 Distearate, PEG-200 hydrogenated glyceryl palmate and/or PEG-120 methyl glucose dioleate.
The cleansing composition according to claim 11 or 14 characterized in that the at least one highly ethoxylated fatty derivative is contained in a total amount of 0.1 to 5.0 %by weight, preferably 0.3 to 2.0 %by weight, in relation to the total weight of the composition.
The cleansing composition according to any of claims 11-15 characterized in that cocamide MEA and PEG-120 methyl glucose dioleate are contained in the thickening system.
The cleansing composition according to any of the preceding claims characterized in that the at least one amphoteric polymer is chosen from Polyquaternium-22, Polyquaternium-47, and Polyquaternium-53.
The cleansing composition according to any of the preceding claims characterized in that the at least one amphoteric polymer is contained in an amount of 0.01 to 5.0 %by weight, preferably 0.02 to 2.0 %by weight, and more preferably 0.02 to 0.63 %by weight, in relation to the total weight of the composition and in relation to the active content.
The cleansing composition according to any of the preceding claims characterized in that the composition does not contain any surfactants having sulfate residues.
The cleansing composition according to any of the preceding claims characterized in that the composition or one or more raw material (s) contain (s) less than 0.1%by weight, preferably less than 0.01%by weight, and more preferably 0 %by weight of sulfate ions and/or sulfate esters in relation to the total weight of the composition or the raw material (s) .
The cleansing composition according to any of the preceding claims characterized in that the composition is free from silicone components.