WO2020099036A1

WO2020099036A1 - Micelle-containing cleansing preparation

Info

Publication number: WO2020099036A1
Application number: PCT/EP2019/077430
Authority: WO
Inventors: Uta Meiring; Jan Nilsson; Caroline Schultze
Original assignee: Beiersdorf Ag
Priority date: 2018-11-16
Filing date: 2019-10-10
Publication date: 2020-05-22
Also published as: DE102018219633A1

Abstract

The invention relates to an aqueous cosmetic cleansing preparation that contains at least one surfactant a) selected from the group of sodium methyl cocoyl taurate, sodium methyl oleoyl taurate, sodium methyl lauroyl taurate, ammonium lauroyl taurate; sodium cocoyl isethionate and sodium methyl lauroyl isethionate; and at least one lipophilic substance b); characterized in that the percentage by weight of the lipophilic substances a) is greater than or equal to the percentage by weight of the lipophilic substances b).

Description

Clean preparation containing micelles

Cosmetic products generally do more than just make them beautiful and attractive

with their effect, they make a decisive contribution to increased self-esteem and the well-being of people. Accordingly, a wide variety of cosmetic products for daily cleaning and care of the

human skin.

The prior art knows various cosmetic cleaning preparations for cleaning human skin. For example, WO 2005079729 A1 discloses oil-containing cleaning preparations which contain a nonionic surfactant and an oil component. When mixed with water, a micellar solution forms.

US 20040053797 A1 also describes micellar cleaning preparations.

Micelles form in aqueous solution in the presence of surfactants, which are arranged so that the hydrophilic parts (heads) of the surfactant molecules align with the adjacent water molecules, whereas the hydrophobic parts of the surfactants (tails) accumulate and thus form their own phase. Such micelles have

typically a size of a few nanometers and thus differ from emulsions which contain an emulsified oil phase with droplet sizes in the micrometer range. For example, micelles that form with sodium lauryl sulfate in water have a diameter of approximately 4 nm.

A preparation containing micelles differs in their physical

Properties of a preparation that contains no micelles. When the micelles are formed or dissolved, for example, the surface tension, the osmotic pressure, the equivalent conductivity, the interfacial tension with respect to oils or hydrophobic solvents and the density of the preparation change.

Aqueous micellar cleaning preparations are currently very popular. Such products usually have a high water content of more than 85% by weight, based on the total weight of the cleaning preparation, and can therefore be used directly as wash water. When used on the skin, the micelles contained can contain oil components (lipophilic soiling, such as skin sebum, faecal Excretions, make-up residues such as: foundations, lipstick, blush, maskara ...) bind and detach them from the skin in a particularly mild way. Due to the high water content, cleaning preparations of this type also penetrate skin pores and wrinkles particularly easily. Improved wetting of the skin pores makes it more effective

Cleaning performance achieved, which is confirmed by consumers.

The micelle-containing cleaning preparations are mostly used to remove oily makeup from the facial skin. The use of such products for cleaning baby skin is less common.

Cleaning preparations for babies are used, for example, when removing diapers to remove excrement residues or when cleaning the whole body. It is crucial for the applicability that the cleaning preparation is particularly suitable for use on very sensitive skin, but at the same time has a particularly effective cleaning performance in order to minimize the application time.

The addition of lipophilic ingredients to micelle-containing cleaning preparations can be advantageous for various reasons. Fragrances that support the cleaning experience olfactory are often desirable for consumers. Furthermore, lipophilic ingredients such as vegetable oils or low-viscosity waxes such as e.g. Add jojoba oil or shea butter derivatives to the skin after cleansing and add lipids

Prevent the skin from drying out. In addition, there are ingredients that contribute to the preservation of the formulations.

A disadvantage, however, is the fact that the micelle-containing cleaning preparation often becomes cloudy when lipophilic components, for example perfume components which do not dissolve clearly in water, are added. Cloudy cleaning preparations do not give the impression that they can be used as washing water for cleaning, so that customers avoid them.

In the event that the micelle-containing cleaning product was designed to remove make-up, this fact can be addressed by incorporating solubilizers into the cleaning preparation. Solubilizers are ethoxylated with ethoxylated (hydrogenated) castor oil (for example PEG-40 Hydrogenated Castor Oil)

Sorbitan fatty acid esters (e.g. polysorbate-20) and polyglyceryl esters of fatty acids (e.g. polyglyceryl-6 caprylates, polyglyceryl-4 caprylates, polyglyceryl-4 cocoates, polyglyceryl-6 ricinoleates and polyglyceryl-10-laurates). With the addition of these solubilizers the clouding lifted. However, the addition of these solubilizers creates considerable product disadvantages, which prevent use as a cleaning preparation for baby skin, sensitive and atopic skin. Thus, the solubilizers reduce the ability of the cleaning preparation to form micelles, which leads to a reduction in the

Cleaning performance leads. This can be compensated for by a higher surfactant concentration. However, an increase in the proportion of surfactants contained in baby products for sensitive, sensitive and atopic skin is not recommended because it is too high

Surfactant concentrations could cause irritation. This is particularly critical for surfactants such as sodium lauryl sulfate or sodium laureth sulfate. Another disadvantage of such products is that the solubilizers are often PEG-containing substances which are suspected of making the skin more permeable by weakening the natural protective barrier of the skin. The use of PEG-containing substances should therefore be avoided, especially in baby products.

In summary, there is a need for cleaning products for babies which, when lipophilic substances are added, show no cloudiness and at the same time have a low level

Form micelle surfactant concentrations.

It has surprisingly been found that clear micelle-containing cleaning preparations according to the present invention can be provided which do not have the disadvantages of the prior art. The cleaning preparations of the invention are able to form micelles at lower surfactant concentrations and at the same time are not or less cloudy. Surprisingly, substances that usually cause turbidity in water can be incorporated without there being any significant turbidity effects.

It is also known to use cleaning preparations containing micelles as the impregnation medium for cleaning wipes. As cloth materials can be natural or

synthetic substances are used. Fibers based on renewable raw materials such as cotton, PLA (polylactic acid) and cellulose and their derivatives are known. The problem is, however, that often after pressing the soaked wipes only an insufficient amount or no micelles in the

Impregnation medium remain. This inevitably leads to a reduction in the

Cleaning performance, which can only be compensated for by increasing the surfactant concentration. There is therefore also a need for cleaning preparations which can be used as impregnation medium for wipes and, after being pressed out or later separated from the impregnation medium and wipe, in the impregnation medium Show micelles. This requirement was also surprising by the present one

Invention covered.

The present invention relates to an aqueous cosmetic

Containing cleaning preparation,

a) at least one surfactant selected from the group sodium methyl cocoyl taurate, sodium methyl oleoyl taurate, sodium methyl lauroyl taurate, ammonium lauroyl taurate; Sodium Cocoyl Isethionate and Sodium Methyl Lauroyl Isethionate, b) at least one lipophilic substance,

characterized in that the weight fraction of the surfactants a) is greater than or equal to the weight fraction of the lipophilic substances b).

Surprisingly, it has been shown that micelles form in the cleaning preparations according to the invention and have no turbidity.

A first embodiment according to the invention is an aqueous cosmetic

Cleaning preparation, which is characterized in that this preparation

a) at least one surfactant selected from the group sodium methyl cocoyl taurate, sodium methyl oleoyl taurate, sodium methyl lauroyl taurate, and ammonium lauroyl taurate; and

b) at least one lipophilic substance,

contains, the weight fraction of the surfactants a) being greater than or equal to the weight fraction of the lipophilic substances b).

A second embodiment of the invention is an aqueous cosmetic

Cleaning preparation, which is characterized in that this preparation

a) at least one surfactant selected from the group sodium cocoyl isethionate and sodium methyl lauroyl isethionate; and

b) at least one lipophilic substance,

Advantageous embodiments of the present invention are furthermore advantageously characterized in that, in addition to the surfactants a), they contain no further surfactants or emulsifiers. Other advantageous embodiments of the invention are characterized in that, in addition to the surfactants a) according to the invention, further surfactants are present, the total proportion of the further surfactants being less than 2% by weight, preferably from 0.05% by weight to 0.5% by weight .-%, based on the total weight of the cleaning preparation.

The other surfactants are preferably selected from the group of alkyl glucosides. The alkylglucosides include the particularly preferred substances decyl glucoside, lauryl glucoside and coco glucoside.

Furthermore, betaines, preferably selected from the group of cocamidopropyl betaine, coco betaine and / or lauramidopropyl betaine, are advantageously used as further surfactants.

Further surfactants which can advantageously be used are further surfactants which are based on amino acids, preferably selected from the group sodium cocoyl glutamate, sodium lauroyl glutamate and / or sodium stearoyl glutamate.

Another surfactant which is advantageously contained in the cleaning preparation as an additional surfactant is sodium cocoamphoacetate.

Accordingly, a third advantageous embodiment of the invention

characterized that the aqueous cosmetic cleaning preparation

b) at least one lipophilic substance, and

c) at least one further surfactant selected from the group of alkyl glucosides,

Cocamidopropylbetaine, Sodium Cocoyl Glutamate, Sodium Lauroyl Glutamate, Sodium Stearoyl Glutamate and Sodium Cocoamphoacetate,

Within the third advantageous embodiment, it is preferred if the aqueous cosmetic cleaning preparation

b) at least one lipophilic substance, and c) at least one further surfactant selected from the group consisting of alkyl glucosides, cocamidopropyl betaine, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium stearoyl glutamate and sodium cocoamphoacetate,

contains, the weight fraction of the surfactants a) being greater than or equal to the weight fraction of the lipophilic substances b) and the total fraction of the further surfactants c) being less than 2% by weight, preferably from 0.05% by weight to 0.5% .-%, which is based on the total weight of the cleaning preparation.

A fourth advantageous embodiment of the invention, characterized in that the aqueous cosmetic cleaning preparation

b) at least one lipophilic substance, and

c) at least one further surfactant selected from the group of alkyl glucosides,

Within the fourth advantageous embodiment, it is preferred if the aqueous cosmetic cleaning preparation

b) at least one lipophilic substance, and

c) at least one further surfactant selected from the group of alkyl glucosides,

In general, it is further preferred if the total proportion of all surfactants contained is less than 1.5% by weight, particularly preferably less than 1.2% by weight, based on the total weight of the cleaning preparation. Weight percentages (% by weight) should be without reference to a particular

Composition or specific mixture are given, this information always refers to the total weight of the cosmetic cleaning preparation. If ratios of components / substances / groups of substances are disclosed, these ratios relate to weight ratios of the above

Components / substances / groups of substances.

If weight percentage ranges for the constituents of the cosmetic cleaning preparation are specified below, the disclosure of the present includes

Registration also all individual values in steps of 0.1 wt .-% within these weight percent ranges.

In the context of the present disclosure, the formulations “according to the invention”, “according to the invention advantageously”, “advantageously within the meaning of the present invention” etc. always refer to the preparation according to the invention.

Unless otherwise stated, all tests were carried out under normal conditions. The term “normal conditions” means 20 ° C, 1013 hPa and a relative air humidity of 50%.

The features of the cleaning preparation according to the invention described below relate to the preparation according to the invention per se, and in each case to the previously described preparations according to the invention in accordance with the advantageous embodiments mentioned.

It is advantageous according to the invention if the cosmetic cleaning preparations of the invention contain no ethoxylated, optionally hydrogenated castor oil, no ethoxylated

Contain sorbitan fatty acid esters and / or no polyglyceryl esters of fatty acids.

Accordingly, the proportion of these substances is advantageously 0% by weight, based on the total weight of the cleaning preparation.

In addition, the cosmetic cleaning preparation according to the invention is preferably characterized in that it contains no substances substituted with polyethylene glycol. Thus, no PEG-containing substances are preferably contained. It is also advantageous according to the invention if the inventive

Cleaning preparation has a pH in the range from 3.6 to 8.5, preferably from 3.8 to 6, particularly preferably from 4.0 to 5.3.

Furthermore, it is advantageous for the purposes of the present invention if the proportion of water in the cleaning preparation according to the invention is at least 85% by weight, preferably at least 90% by weight and particularly preferably at least 91% by weight, the details being based on refer to the total weight of the cleaning preparation.

Furthermore, it is advantageous according to the invention if the proportion of surfactants a) in the cleaning preparations according to the invention and the proportion of surfactants a) in the respective embodiments of the invention are from 0.1% by weight to 2% by weight, preferably from 0.25% by weight to 1.5% by weight and particularly preferably from 0.4% by weight to 1.0% by weight, based on the total weight of the cleaning preparation.

It is also advantageous according to the invention if the weight ratio of the surfactants a) to the lipophilic substances b) is from 20: 1 to 1: 1, preferably from 15: 1 to 1, 2: 1 and

is particularly preferably from 10: 1 to 2: 1. This applies in particular to the 1st to 4th advantageous embodiment of the invention.

Because micelle-containing cleaning preparations have formed in particular with the low surfactant proportions according to the invention, it was possible to provide a particularly mild cleaning preparation with micelles, which is also added

Presence of lipophilic substances are less cloudy.

Furthermore, advantageous embodiments of the invention are characterized in that a lipophilic substance is understood to mean a substance which has an octanol / water distribution coefficient (log Kow) of greater than 0 and is not an emulsifier or surfactant. Accordingly, the lipophilic substance b) is advantageous

characterized that this is not an emulsifier and no surfactant and has an octanol-water partition coefficient log Kow greater than 0.

The log Kow value is derived from the definition

log K _ow = log C ₀ - log C _w where C ₀ indicates the concentration of the respective substance in the octanol phase and C _w the concentration of the chemical in the water phase. That means log Kow is positive for lipophilic and negative for hydrophilic substances.

According to the invention, the log Kow value of the substances used is determined according to the Crippen calculation method, which is derived from the publication J. Chem. Inf. Comput. Be. 1999, 39, 868-873 with the title "Prediction of Physicochemical Parameters by atomic contribution" is known.

The following table shows some of them calculated using the Crippen method

Distribution coefficients (log Kow) listed.

Table 1 :

It is also pointed out that known natural oils, in particular vegetable oils, are also referred to according to the invention as lipophilic substances. From a chemical point of view, vegetable oils are composed of a large number of lipophilic substances that have a distribution coefficient (log Kow) of greater than 0. The

The distribution coefficient for the individual chemical ingredients can be calculated using the Calculate the Crippen method. Because of their chemical composition, INCI substances such as Simmondsia Chinensis (jojoba) seed oil or Butyrospermum Parkii (Shea) butter are also among the lipophilic substances according to the invention.

It is also advantageous if the lipophilic substance according to the invention is additionally characterized in that it has a melting point of 1013 hPa of at most 40 ° C, preferably at most 35 ° C and particularly preferably of at most 30 ° C, it being further advantageous if no lipophilic substances with a higher melting point are contained.

Advantageous embodiments of the invention are further characterized in that the lipophilic substance has an octanol / water distribution coefficient (log Kow) in the

Has a range of 0.5 to 4.5.

It is also advantageous if the lipophilic substance has a melting point of max. 30 ° C. at 1013 hPa, an octanol / water partition coefficient (log Kow) in the range from 0.5 to 4.5 and is not an emulsifier or surfactant, it being it is further preferred if no lipophilic substance with a melting point of more than 30 ° C. is contained.

Advantageous embodiments of the invention are further characterized in that the proportion of the lipophilic substance is from 0.01% by weight to 2% by weight, preferably 0.05% by weight to 1.5% by weight, particularly preferably from 0.1 wt .-% to 0.75 wt .-%, based on the total weight of the cleaning preparation.

Further advantageous embodiments of the invention are characterized in that the proportion of the lipophilic substance which has a melting point of at most 30 ° C. is from 0.01% by weight to 2% by weight, preferably 0.05% by weight to 1.5% by weight and particularly preferably from 0.1% by weight to 0.75% by weight, based on the total weight of the

Cleaning preparation is.

Further advantageous embodiments of the invention are characterized in that the portion of the lipophilic substance which has a melting point of at most 30 ° C. has an octanol-water distribution coefficient (log Kow) in the range from 0.5 to 4.5 and no emulsifier or is a surfactant, from 0.01% by weight to 2% by weight, preferably 0.05% by weight to 1.5% by weight and particularly preferably from 0.1% by weight to 0.75 % By weight, based on the total weight of the cleaning preparation. Further advantageous embodiments of the invention are characterized in that the proportion of the lipophilic substance which has a melting point of at most 30 ° C. has an octanol-water distribution coefficient (log Kow) in the range from 0.5 to 4.5, and none Is emulsifier or surfactant, from 0.01% by weight to 2% by weight, preferably 0.05% by weight to 1.5% by weight and particularly preferably from 0.1% by weight to 0, 75% by weight, based on the total weight of the cleaning preparation, is no lipophilic substance with a melting point of more than 30 ° C.

Further advantageous embodiments of the invention are characterized in that the portion of the lipophilic substance which has a melting point of at most 30 ° C. has an octanol-water distribution coefficient (log Kow) in the range from 0.5 to 4.5 and no emulsifier or is a surfactant, from 0.01% by weight to 2% by weight, preferably 0.05% by weight to 1.5% by weight and particularly preferably from 0.1% by weight to 0.75 % By weight, based on the total weight of the cleaning preparation, no lipophilic substance with a melting point of more than 30 ° C. and no substance with an octanol / water partition coefficient (log Kow) of more than 4.5 being present.

Emulsifiers are understood to mean all substances which are listed in the International Cosmetic Ingredient Dictionary and Handbook, Thirteenth Edition 2010, (ISBN 1-882621-47-6) under the name “emulsifying agent”. Everyone under surfactants

Understand substances that are in the International Cosmetic Ingredient Dictionary and

Handbook, Thirteenth Edition 2010, (ISBN 1-882621-47-6) under the name “

Surfactant ”.

Furthermore, advantageous embodiments of the invention are characterized in that the lipophilic substance is selected from the group of fragrances which are liquid under normal conditions. A liquid fragrance can be any natural or synthetic perfume component known to a person skilled in the art of fragrance production. The lipophilic substance from the group of the fragrances geraniol, geranyl acetate, linalool, linalyl acetate, tetrahydrolinalool, citronellol, citronellyl acetate, dihydromyrcenol, dihydromyrcenylacetate, tetrahydromyrcenol, terpineol, terpinylacetate, nopol, nopylacetate, is particularly preferred

2-phenylethyl acetate, benzyl alcohol, benzyl acetate, benzyl salicylate, benzyl benzoate,

Styrallyl acetate, amyl salicylate, dimethylbenzylcarbinol, trichloromethylphenylcarbinylacetate, p-tert-butylcyclohexyl acetate, isononylacetate, vetiveryl acetate, vetiverol, alpha-hexylcinammic aldehydes, 2-methyl-3- (p-tert.butylphenyl) propanol isopropylphenyl) propanal,

3- (p-tert-butylphenyl) propanal, tricyclodecenyl acetate, tricyclodecenyl propionate, 4- (4-hydroxy-4-methylpentyl) -3-cyclohexenecarbaldehyde, 4- (4-methyl-3-pentenyl) -3- cyclohexenecarbaldehyde, 4-acetoxy-3-pentyltetrahydropyran, methyldihydrojasmonate, 2-n-heptylcyclopentanone, 3-methyl-2-pentylcyclopentanone, n-decanal, 9-decenol-1,

Phenoxyethyl isobutyrate, phenyl acetaldehyde dimethylacetal, geranonitrile, citronellonitrile, cedrylacetate, 3-isocamphylcyclohexanol, cedryl methyl ether, isolongifolanone, aubepin nitrile, aubepin, heliotropin, coumarin, eugenol, vanillin, ionomethylnone ionone-3 Esters thereof, indan musk fragrances, tetralin musk fragrances, isochromic musk fragrances, macrocyclic ketones, macrolactone musk fragrances, ethylene brassylate and aromatic nitro musk fragrances are selected. Some perfume components are also found in Arctander, Perfume and Flavor Chemicals

(Chemicals), Vol. I and II (1969) and Arctander, Perfume and Flavor Materials of Natural Origin (1960).

Accordingly, it is likewise advantageous if the proportion of the lipophilic substance selected from the group of liquid fragrances, in particular the fragrances mentioned above, is from 0.01% by weight to 2% by weight, preferably from 0.05% by weight to 1.5% by weight, particularly preferably from 0.1% by weight to 0.75% by weight, based on the total weight of the

Cleaning preparation is.

Furthermore, advantageous embodiments of the invention are characterized in that the lipophilic substance is advantageously selected from the group of the alkane-1,2-diols, the use of 1,2-hexanediol, caprylyl glycol and / or 1,2-decanediol being particularly preferred is.

Accordingly, it is likewise advantageous if the proportion of the lipophilic substance selected from the group of the alkane-1,2-diols, in particular that preferred above

characterized alkane-1,2-diols, from 0.01 wt .-% to 3 wt .-%, preferably 0.05 wt .-% to 2 wt .-% and particularly preferably from 0.1 wt .-% to 1.5% by weight, based on the total weight of the cleaning preparation.

Furthermore, advantageous embodiments of the invention are characterized in that the lipophilic substance is advantageously selected from the group phenoxyethanol and / or ethylhexylglycerol.

If phenoxyethanol and / or ethylhexylglycerol are present, the total proportion of these substances is advantageously from 0.05% by weight to 1% by weight, preferably 0.075% by weight to 0.9% by weight and particularly preferably from 0, 1 wt .-% to 0.8 wt .-%, based on the total weight of the cleaning preparation. Furthermore, advantageous embodiments of the invention are characterized in that the cosmetic cleaning preparation has no further phase in addition to an aqueous phase. In these advantageous embodiments, all components are dissolved in the aqueous phase, so that no second phase can be recognized by the human eye over a phase boundary.

Consequently, it is also advantageous if the lipophilic substance is selected such that when this substance is mixed with water in a proportion of 3% by weight, no two phases form, the weight given being based on the total weight of the mixture of water and of the lipophilic substance.

It is also advantageous if the lipophilic substance according to the invention is characterized in that when this substance is mixed with water in a proportion of 0.1% by weight, the mixture of water and this substance has a transmission of less than 90% Has a wavelength of 550 nm. In the above description, the weight specification relates to the total weight of the mixture of water and the lipophilic substance.

The transmission can be measured using methods known to those skilled in the art using a commercially available UV / Vis spectrometer. The gap width should be set to 1 nm.

Furthermore, according to the invention, a preparation is considered cloudy if it has an NTU value (nepheolometric turbidity units) of more than 10, the value advantageously being determined under normal conditions using a Hach 2100 An turbidimeter.

The measurement is carried out according to the manufacturer's instructions Hach Basic User Manual DOC022.97.80205 for 2100AN, 11/2014, Edition 6 in the "automatic ranging" mode.

In addition, it is advantageous for the purposes of the present invention if the cosmetic cleaning preparation contains glycerin and the proportion of glycerin is preferably from 0.01% by weight to 6% by weight, based on the total weight of the cleaning preparation.

The cosmetic cleaning preparations according to the invention can furthermore advantageously contain sodium benzoate. If the cosmetic cleaning preparation contains sodium benzoate, it is advantageous according to the invention if the proportion of sodium benzoate is from 0.1% by weight to 0.5% by weight, based on the total weight of the cleaning preparation. It is also advantageous if the cosmetic cleaning preparation is characterized in that it contains sodium salicylate and the proportion of sodium salicylate is preferably from 0.1% by weight to 0.5% by weight, based on the total weight of the

Cleaning preparation is.

Another surprising aspect of the present invention relates to the fact that when the cleaning preparation according to the invention is used as a soaking medium for

Cleaning wipes is used, and then the impregnation medium is separated from the wipes, there are still micelles in the impregnation medium. So when using the soaked wipes by the consumer, micelles are in the

Contain impregnation medium, which is transferred to the skin via the cloth.

Cloth materials to be selected advantageously are PET, polylactic acid (PLA), viscose fiber (tencil), cellulose, cellulose acetates, cotton fiber and mixtures of these

Materials. Viscose fibers and / or cellulose acetates are preferably used as the cloth material. The cloth material particularly preferably contains viscose fibers.

Accordingly, surprisingly soaked wipes with micelles could be provided in the soaking medium. Another object of the present invention is thus a cosmetic cleaning wipe impregnated with the cosmetic cleaning preparation according to the invention.

The cosmetic cleansing preparations according to the invention can also contain further cosmetic auxiliaries and active substances, as are usually present in such

Preparations are used, e.g. B. other active ingredients, preservatives,

Preservation aids, bactericides, lipids, dyes and color pigments, thickeners, moisturizing and / or moisturizing substances or other usual components of a cosmetic or dermatological formulation such as other polyols, foam

stabilizers, organic solvents or silicone derivatives, provided that the addition does not impair the required properties with regard to stability or

excluded are.

Comparative tests and examples

The following examples are intended to illustrate the present invention without restrict. Unless otherwise stated, all quantities, proportions and percentages are based on the weight and the total amount or on the total weight of the preparations.

In the table below, the example formulations according to the invention Example 1 to Example 5 as well as the example formulations not according to the invention Comp. 1 and Comp. 2 are listed.

Table 2:

To assess whether micelles develop in the sample formulations, a reverse CMC measurement was carried out with a K100 tensiometer from Krüss at a measuring temperature of 20 ° C. The Krüss standard ring with a radius of 9.545 mm and a wire diameter of 0.37 mm was used as the configuration.

The other procedure parameters are:

Surface detection speed: 10 mm / min

Sensitivity surface detection: 0.001 g

Immersion depth: 3.00 mm

Measured values per concentration: 10

Concentration distances: exponential

Number of different concentrations: 30-40

Flow rates: 34 ml / min For the test series, the respective recipe was diluted by adding demineralized water over two Dosimats (700 Dosino), while the same amount was suctioned off in order to keep the volume in the vessel constant. The surface tension of the respective formulation was measured before dilution and after each dilution step. If micelles are present, the surface tension remains constant during the dilution until the CMC is undershot.

For the example recipes Ex. 1 to Ex. 5, constants were constant

Surface tensions measured from 30 mN / m up to a dilution of the example formulations to 70% by weight in water. When the sample formulations cf. 1 and cf. 2 were diluted, no constant surface tensions could be determined.

According to the invention, micelles are contained in the preparation if no change in the surface tension of more than ± 5 mN / m is measured from a proportion of 100% by weight of example preparation to a dilution to a proportion of 70% by weight.

The preparations with the combination as claimed (example formulations 1 to 5) were completely clear and had an apparent appearance comparable to pure water. On the other hand, it was found that the comparison preparation Cf. 1, which contains no surfactants according to the claims, was cloudy. For the example formulations Ex.1 to Ex.3 and Comp.1 and Comp.2, turbidity measurements were carried out with a Hach 2100An turbidimeter and the NTU values (nephelometric turbidity units) were determined. The measurement was carried out according to the instructions (Hach Basic User Manual DOC022.97.80205 for 2100AN, 1 1/2014, Edition 6). It was measured in the "automatic ranging" mode. The higher the NTU value, the more cloudy the preparation. For example, pure water has an NTU value of 0.016. Milk with 3.5% fat has an NTU value greater than 100,000. The specific NTU values are summarized below:

Table 3:

These results show that significantly clearer cleaning preparations are obtained by using the combination according to the invention. If the combination is dispensed with, the preparation is clearly cloudy, as the comparative example Cf. 1 shows. As already described above, it is possible to clarify the cleaning preparation by means of additives containing PEG, as in comparison 2, but the formation of micelles is prevented. This shows the results Table 2. The concentration of surfactants would have to be increased in order to form micelles. Only the combination according to the invention can surprisingly provide clear micelle-containing cleaning preparations which are particularly mild or have very low surfactant contents. Thus, these are according to the invention

Preparations particularly suitable for baby skin.

Furthermore, the example preparations Example 1 and Example 5 were used as impregnation medium for cleaning wipes. The wipes used consisted of 30% by weight

Viscose fiber and 70% cellulose acetates. After impregnation of the wipes, the wipes were pressed out and a reverse CMC measurement was carried out with the solution obtained in accordance with the method described above.

For the example recipes Ex. 1 and Ex. 5 were constant

Surface tensions of 30 mN / m up to a dilution of the example formulations to 30% by weight measured in water. The micelles are thus retained in water up to a dilution to 30% by weight.

In addition, it was found that the cleaning preparations according to the invention are distributed particularly uniformly on the wipes when used as a soaking medium for cleaning wipes. This behavior was found especially for viscose and cellulose acetate wipes.

The following example formulations are intended to further illustrate the invention.

Claims

1. containing aqueous cosmetic cleaning preparation,

a) at least one surfactant selected from the group sodium methyl cocoyl

Taurate, sodium methyl oleoyl taurate, sodium lauroyl taurate, ammonium lauroyl taurate; Sodium cocoyl isethionate and sodium methyl lauroyl isethionate; and

b) at least one lipophilic substance;

2. Cleaning preparation according to claim 1, characterized in that the

preparation

a) at least one surfactant selected from the group sodium methyl cocoyl

Taurate, sodium methyl oleoyl taurate, sodium lauroyl taurate, and ammonium lauroyl taurate; and

b) at least one lipophilic substance,

contains, the proportion by weight of the surfactants a) greater than or equal to that

Weight fraction of the lipophilic substances b).

3. Cleaning preparation according to claim 1, characterized in that the

preparation

b) at least one lipophilic substance,

Weight fraction of the lipophilic substances b).

4. Cleaning preparation according to one of the preceding claims

characterized in that in addition to the surfactants a) no broad surfactants or

Emulsifiers included.

5. Cleaning preparation according to one of claims 1 or 2, characterized in that, in addition to the surfactants a) according to the invention, further surfactants are present, the total proportion of the further surfactants being less than 2% by weight, preferably from 0.05% by weight to 0 , 5 wt .-%, based on the total weight of the

Cleaning preparation, is.

6. Cleaning preparation according to claim 5, characterized in that at least one further surfactant selected from the group of alkyl glucosides,

Cocamidopropyl betaine, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium stearoyl glutamate and sodium cocoamphoacetate are included.

7. Cleaning preparation according to one of the preceding claims

characterized in that the total proportion of all surfactants contained less than 1.5% by weight, particularly preferably less than 1.2% by weight, based on the

Total weight of the cleaning preparation is.

8. Cleaning preparation according to one of the preceding claims

characterized in that no ethoxylated, optionally hydrogenated castor oil, no ethoxylated sorbitan fatty acid esters and / or no polyglyceryl esters of fatty acids are contained.

9. Cleaning preparation according to one of the preceding claims

characterized in that it contains no substances substituted with polyethylene glycol.

10. Cleaning preparation according to one of the preceding claims

characterized in that the proportion of surfactants a) from 0.1% by weight to 2% by weight, preferably from 0.25% by weight to 1.5% by weight and particularly preferably from 0.4% by weight. -% to 1, 0 wt .-%, based on the total weight of

Cleaning preparation, is.

1 1. Cleaning preparation according to one of the preceding claims

characterized in that the weight ratio of the surfactants a) to the lipophilic substances b) is from 20: 1 to 1: 1, preferably from 15: 1 to 1: 2: 1 and particularly preferably from 10: 1 to 2: 1.

12. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance has an octanol / water partition coefficient (log Kow) greater than 0 and is not an emulsifier or surfactant.

13. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance contains an octanol-water Distribution coefficient (log Kow) in the range of 0.5 to 4.5 and is not an emulsifier or surfactant.

14. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance has a melting point of at most 40 ° C, preferably at most 35 ° C and particularly preferably of at most 30 ° C at 1013 hPa.

15. Cleaning preparation according to one of the preceding claims

characterized that no lipophilic substances at 1013 hPa with a

Melting point of higher than 40 ° C, preferably higher than 35 ° C and particularly preferably higher than 30 ° C is included.

16. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance is selected from the group of liquid fragrances.

17. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance is selected from the group of alkane-1,2-diols, the use of 1,2-hexanediol, caprylyl glycol and / or 1,2-decanediol being preferred.

18. Cleaning preparation according to one of the preceding claims

characterized that lipophilic substance is selected from the group

Phenoxyethanol and / or ethylhexylglycerol.

19. Cleaning preparation according to one of the preceding claims

characterized in that the lipophilic substance is selected such that when this substance is mixed with water in a proportion of 3% by weight, no two phases form, the weight given relating to the total weight of the mixture of water and the lipophilic substance .

20. Cleaning preparation according to one of the preceding claims

characterized in that the cosmetic cleaning preparation has no further phase besides an aqueous phase.

21. Cleaning preparation according to one of the preceding claims

characterized in that the cleaning preparation water in a proportion of at least 85 wt .-%, preferably at least 90 wt .-% and in particular preferably of at least 91% by weight, based on the total weight of the cleaning preparation.

22. Cosmetic wipe soaked with a cosmetic

Cleaning preparation according to one of claims 1 to 21.

23. Cosmetic cleaning cloth according to claim 22, characterized in that the cloth material contains viscose fiber.