DE102018205244A1 - Cosmetic cleaning preparation containing amylase - Google Patents

Abstract

The present invention relates to the use of amylase for improving the foam properties of a cosmetic cleansing preparation. Furthermore, the present invention relates to a cosmetic cleansing preparation containing amylase.

Description

The present invention relates to the use of amylase for improving the foam properties of a cosmetic cleansing preparation. Furthermore, the present invention relates to a cosmetic cleansing preparation containing amylase.

In general, cosmetic products not only look beautiful and attractive, they also make a significant contribution to increasing self-esteem and well-being. Accordingly, the most diverse cosmetic products are used for the daily cleaning and care of the skin.

The requirements for cosmetic cleaning products are versatile. The focus is on effective and thorough cleaning performance. Furthermore, popular consumer products are characterized by a pleasant fragrance that surrounds you when you apply the product. Advantageously, the fragrances remain longer after the rinsing of the cleaning product on the skin, so that even after cleaning the pleasant fragrance is perceived. Another characteristic aspect of cosmetic cleansing products is their sensory properties. These include, among other things, the color of the cleaning preparation or the sensor of the foam of the cleaning preparation.

When evaluating the sensory properties of foams, the foam volume, the fine-poredness and the stability of the foam must be distinguished. The foam volume indicates which volume of space a foam occupies. Particularly voluminous foams are often associated with a particularly good cleaning performance by the consumer. Are the foams particularly fine-pored - that is, the foam bubbles are particularly small - so the foam is often perceived as particularly nourishing. In addition, most consumers prefer fine-pored foams because they produce a more pleasant, moisturized skin feel. Accordingly, the increasing popularity of cleaning preparations in aerosol form can be explained, in which a fine-pored, foamed with propellant cosmetic preparation is used directly for the application. In contrast, the stability of foams depends on how long it takes for a foam to collapse, dissolve and disappear. The longer the foam does not collapse, dissolves less and thus disappears less, the more stable is a foam.

In order to be able to produce particularly voluminous foams, it is often necessary to use particularly high concentrations of surfactants. However, this has the disadvantage that the cleaning preparations are less mild to the skin. Accordingly, cleaning preparations with lower surfactant contents have the disadvantage that they often form an insufficient foam volume. For this reason, there is a need for cleaning preparations with low surfactant levels, which also form a voluminous foam. A first object of the present invention is thus to provide cleaning preparations which form a voluminous foam.

Furthermore, foams of cosmetic cleaning preparations often have the disadvantage that they rapidly collapse and dissolve after foaming. Thus, these foams have insufficient stability. This is particularly a problem when the cosmetic cleansing formulations contain only low levels of surfactant. A further object of the present invention was therefore to provide cleaning formulations which form more stable foams.

Another aspect concerns the fact that foams often have an insufficiently uniform bubble size in the formulation with low surfactant concentrations. This disadvantage should also be solved by the present invention.

The state of the art knows, among other things, the documents US 5723111 A and EP 3145474 A1 which disclose methods for improving the foam properties of cosmetic preparations. However, none of these documents could guide the skilled artisan to the present inventions.

Surprisingly, it has now been found that the foam stability and the foam volume after and during foaming of the cleaning preparation can be increased by adding amylase to a cosmetic cleansing preparation. Furthermore, it has been found that the foam formed has a particularly uniform bubble size.

A first subject of the present invention is thus the use of amylase in a cosmetic cleansing preparation for increasing the foam volume during foaming Increasing the stability of foams after foaming the cleaning preparation and / or to form a foam with uniform bubble size.

Another object of the present invention is a cosmetic cleaning preparation containing amylase and one or more surfactants, wherein the total content of surfactants less than 12 wt .-%, preferably less than 10 wt .-%, more preferably less than 6 wt .-% and particularly preferably less than 5 wt .-% of surfactants, based on the total weight of the cleaning preparation is.

If weight percentages are given below without reference to a particular composition or specific mixture, these figures always refer to the total weight of the cosmetic cleansing preparation.

If ratios of certain components / substances / substance groups are disclosed in the following description, these ratios, unless stated otherwise, relate to weight ratios of the components / substances / substance groups.

When the term skin is used in the present disclosure, it refers to the human skin.

The formulations "according to the invention", "advantageous according to the invention", "advantageous in the sense of the present invention" etc., in the context of the present disclosure always relate both to the preparation according to the invention and to the use according to the invention.

Unless otherwise stated, all experiments are conducted under normal conditions. The term "normal conditions" means 20 ° C, 1013 hPa and a relative humidity of 50%.

It is advantageous according to the invention if the proportion of amylase in the cosmetic cleansing preparation is from 0.01% by weight to 5% by weight, preferably from 0.05% by weight to 3.5% by weight and particularly preferably 0, 1 wt .-% to 2 wt .-%, based on the total weight of the cleaning preparation is.

The amylases according to the invention include, inter alia, α-amylase, β-amylase, γ-amylase and isoamylases, the use of α-amylase being preferred according to the invention.

When an α-amylase is selected as the amylase, it is further preferred according to the invention if the α-amylase is obtained from bacteria or fungal cultures, it being particularly preferred when the α-amylase is isolated from Aspergillus oryzae.

Furthermore, it is advantageous according to the invention if the amylase, in particular the α-amylase, has a molecular weight of 40 kDa to 60 kDa, preferably 45 kDa to 55 kDa.

Such an α-amylase according to the invention can be obtained inter alia under product number 10065 from Sigma Aldrich (CAS: 9001-19-8).

According to the invention, the total amount of the surfactants in the cosmetic cleansing preparation is less than 12 wt .-%, preferably less than 10 wt .-%, more preferably less than 6 wt .-% and particularly preferably less than 5 wt .-% surfactants, based on the total weight of the cleaning preparation is.

Furthermore, it is advantageous according to the invention if the total proportion of the surfactants in the cosmetic preparation is at least 0.1% by weight, preferably at least 2% by weight and especially preferably at least 3.5% by weight, based on the total weight of the cleaning preparation , is.

Accordingly, advantageous embodiments of the invention are characterized in that the total proportion of the surfactants in the cosmetic cleaning preparation 0.1 wt .-% to 12 wt .-%, preferably 2 wt .-% to 10 wt .-% and particularly preferably 3.5 Wt .-% to 6 wt .-%, based on the total weight of the cleaning preparation is.

Anionic surfactants generally have carboxylate, sulfate or sulfonate groups as functional groups. In aqueous solution, they form negatively charged organic ions in an acidic or neutral medium.

It is advantageous according to the invention if the cosmetic cleansing preparation according to the invention contains one or more anionic surfactants as surfactants, particular preference being given to amino acid surfactants. As amino acid surfactants according to the invention surfactants are referred to, which are carboxylate salts of α-amino acids, wherein the amine group is acylated at the α-carbon atom of the amino acid salt with a fatty acid containing 10 to 22 carbon atoms.

Particular advantageous embodiments of the invention are characterized in that one or more anionic amino acid surfactants are contained as surfactants, the anionic amino acid surfactants being selected from the group of mono- or dicarboxylate salts (for example sodium, potassium, ammonium) of N-acylated glutamic acid, the monocarboxylate salts (for example, sodium, potassium, ammonium) of N-acylated alanine, the monocarboxylate salts (e.g., sodium, potassium, ammonium) of N-acylated glycine, the monocarboxylate salts (e.g., sodium, potassium, ammonium) of N-acylated sarcosine, and mixtures thereof.

Inventive examples of mono- or dicarboxylate salts (for example, sodium, potassium, ammonium) of N-acylated glutamic acid are INCI names sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, disodium stearoyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate, and potassium myristoyl glutamate. Inventive examples of monocarboxylate salts (for example, sodium, potassium, ammonium) of N-acylated alanine are known by the INCI names sodium cocoyl alaninate and TEA lauroyl alaninate. Inventive examples of mono- or dicarboxylate salts (for example, sodium, potassium, ammonium) of N-acylated glycine are known by the INCI names sodium cocoyl glycinate and potassium cocoyl glycinate. Inventive examples of mono- or dicarboxylate salts (for example sodium, potassium, ammonium) of N-acylated sarcosine are known by the INCI names sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate and ammonium lauroyl sarcosinate.

Among the abovementioned anionic amino acid surfactants, the mono- or dicarboxylate salts of N-acylated glutamic acid are preferably selected, with sodium cocoyl glutamate being particularly preferably present.

Advantageously in accordance with the invention, the proportion of anionic amino acid surfactants, preferably the proportion of monocarboxylic or dicarboxylate salts of N-acylated glutamic acid and particularly preferably the proportion of sodium cocoyl glutamate, is from 0.5% by weight to 4% by weight, based on the Total weight of the cleaning preparation.

According to the invention, the proportion of the anionic amino acid surfactants, preferably the proportion of the mono- or dicarboxylate salts of the N-acylated glutamic acid, and particularly preferably the proportion of sodium cocoyl glutamate, 1 wt .-% to 3 wt .-%, based on the total weight the cleaning preparation.

• R ein linearer oder verzweigter C₈-C₁₈-Alkylrest oder Mischungen verschiedener linearer oder verzweigter C₈-C₁₈-Alkylreste ist;
• R¹ ein Methyl, Ethyl oder Gemische davon ist;
• M⁺ ein Kation, ausgewählt aus der Gruppe bestehend aus Alkalimetallen, NH₄ ⁺ und HNR² ₃ ⁺ ist, wobei R² ausgewählt ist aus der Gruppe bestehend aus linearen oder verzweigten Alkylresten, CH₂CH₂OH und CH₂CH(OH)CH₃;
• x eine ganzzahlige Zahl im Bereich von 0 - 3 ist;
• y eine ganzzahlige Zahl im Bereich 0 - 10 ist; und
• z eine ganzzahlige Zahl im Bereich 0 - 30 ist.

It is furthermore advantageous if the cosmetic cleansing preparation according to the invention comprises one or more anionic surfactants of the formula (I) RO- (CH ₂ CH ₂ O) _x - (CH ₂ -CHR ¹ O) y- (CH ₂ CH ₂ O) _z -SO ₃ ^- M ⁺ (I) contains, characterized in that

• R is a linear or branched C ₈ -C ₁₈ -alkyl radical or mixtures of different linear or branched C ₈ -C ₁₈ -alkyl radicals;
• R ^{1 is} methyl, ethyl or mixtures thereof;
• M ⁺ is a cation selected from the group consisting of alkali metals, NH ₄ ⁺ and HNR ^{+ 2} is _3, wherein R ² is selected from the group consisting of linear or branched alkyl groups, CH ₂ CH ₂ OH and CH ₂ CH (OH) CH ₃ ;
• x is an integer number in the range of 0-3;
• y is an integer number in the range 0-10; and
• z is an integer number in the range 0 - 30.

Particularly preferred surfactants of the formula (I) are selected from the group sodium laureth sulfate (sodium lauryl ether sulfate) and / or ammonium laureth sulfate (ammonium lauryl ether sulfate).

Furthermore, it is advantageous according to the invention if the cosmetic cleaning preparation contains one or more nonionic surfactants as surfactants. The nonionic surfactants are preferably selected from the group of alkyl glycosides, wherein the use of decyl glycoside is particularly preferred.

According to the invention, the proportion of nonionic surfactants, preferably the proportion of alkyl glycosides and particularly preferably the proportion of decyl glycoside, is advantageously from 1% by weight to 6% by weight, based on the total weight of the cleaning preparation.

Particularly advantageously, the proportion of nonionic surfactants, preferably the proportion of alkyl glycosides and particularly preferably the proportion of decyl glycoside, 2 wt .-% to 4 wt .-%, based on the total weight of the cleaning preparation.

• - Acyl-/dialkylethylendiamin, beispielsweise Natriumacylamphoacetat, Dinatriumacylamphodipropionat, Dinatriumalkylamphodiacetat, Dinatrium Cocoamphodiacetat, Natrium Cocoamphomonoacetat, Natriumacylamphohydroxypropylsulfonat, Dinatriumacylamphodiacetat und Natriumacylamphopropionat;
• - Betaine, beispielsweise Coco Betaine, Cocoamidopropyl Betaine; und
• - Sultaine, beispielsweise Lauryl Hydroxy Sultaine.

Furthermore, it is inventively advantageous if the cosmetic cleaning preparation one or more amphoteric and / or zwitterionic surfactants. Advantageously used amphoteric and / or zwitterionic surfactants

• Acyl / dialkylethylenediamine, for example, sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, disodium cocoamphodiacetate, sodium cocoamphomonoacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate and sodium acylamphopropionate;
• Betaines, for example coco betaines, cocoamidopropyl betaines; and
• - Sultaine, for example Lauryl Hydroxy Sultaine.

Particularly advantageously, the amphoteric and / or zwitterionic surfactants known under the INCI names include sodium cocoamphoacetate, disodium cocoamphodiacetate, sodium cocoamphopropionate, disodium cocoamphodipropionate, coco betaine, lauryl betaine and / or cocamidopropyl betaine. From the above group, cocamidopropyl betaine is selected as the most preferred amphoteric and / or zwitterionic surfactant.

Furthermore, it is advantageous according to the invention if the cosmetic cleansing preparation contains water in a proportion of 60% by weight to 98% by weight, preferably 70% by weight to 88% by weight and particularly preferably 75% by weight to 85% Wt .-%, based on the total weight of the cosmetic preparation.

Furthermore, it is advantageous if the cosmetic cleaning preparation according to the invention contains PEG-40 Hydrogenated Castor Oil. If the cosmetic preparation according to the invention contains PEG-40 hydrogenated castor oil, it is preferred according to the invention if the proportion of PEG-40 hydrogenated castor oil is from 0.2% by weight to 1% by weight, based on the total weight of the cleaning preparation, is.

It is furthermore advantageous if the cosmetic cleansing preparation contains PEG-200 Hydrogenated Glyceryl Palmate. Contains the cosmetic cleaning preparation PEG-200 Hydrogenated Glyceryl Palmate so the proportion of PEG-200 Hydrogenated Glyceryl Palmate is preferably from 0.2 wt .-% to 0.6 wt .-%, based on the total weight of the cleaning preparation.

Embodiments of the invention which are advantageous according to the invention also contain glycerol, sorbitol, methylpropanediol and / or propylene glycol. If the cleaning preparation according to the invention contains glycerol, it is preferred according to the invention if the proportion of glycerol is 1.5% by weight to 8% by weight, based on the total weight of the cleaning preparation. If the cleaning preparation according to the invention contains sorbitol, it is preferred according to the invention if the proportion of sorbitol is from 2.5% by weight to 4.5% by weight, based on the total weight of the cleaning preparation. If the cleaning preparation according to the invention contains propylene glycol, it is preferred according to the invention if the proportion of propylene glycol is 1.5% by weight to 1% by weight, based on the total weight of the cleaning preparation.

Furthermore, it is advantageous according to the invention if the cosmetic cleaning preparation contains benzoic acid, salicylic acid and / or their corresponding salts, preferably sodium benzoate and / or sodium salicylates. The total amount of benzoic acid, salicylic acid, sodium benzoate and / or sodium salicylates is advantageously from 0.3% by weight to 0.6% by weight, based on the total weight of the cleaning preparation.

Furthermore, it is advantageous according to the invention if the cosmetic cleaning preparation contains 1,2-hexanediol, phenoxyethanol and / or ethylhexylglycerol. Contains the cosmetic cleaning preparation 1,2-hexanediol, the proportion of 1,2-hexanediol is advantageously from 0.2 wt .-% to 0.7 wt .-%, based on the total weight of the cleaning preparation. Contains the cosmetic cleaning preparation phenoxyethanol, the proportion of phenoxyethanol is advantageously 0.2 wt .-% to 1.0 wt .-%, based on the total weight of the cleaning preparation. If the cosmetic cleaning preparation contains ethylhexylglycerol, the proportion of ethylhexylglycerol is advantageously from 0.2% by weight to 0.6% by weight, based on the total weight of the cleaning preparation.

The cleaning preparation according to the invention may contain further constituents according to the invention. Thus, it is advantageous according to the invention if the preparation according to the invention contains as further constituents one or more compounds selected from the group of further preservatives, film formers, dyes and color pigments, vitamin E acetate, allantoin, panthenol, almond oil, grapeseed oil and other vegetable oils.

Comparative experiments and examples

The following examples are intended to illustrate the present invention without limiting it. Unless indicated otherwise, all amounts, proportions and percentages are based on the weight and the total amount or on the total weight of the preparations.

The preparations Ex.2 . EX3 . Bsp.5 and Bsp.6 are according to the invention, while the preparations of the example formulations Ex.1 and EX4 contain no amylase and accordingly are not according to the invention.

The following comparative formulations were prepared: ingredients Ex.1 Ex.2 EX3 EX4 Bsp.5 Bsp.6 Amylase ¹ 0.1 0.2 0.1 0.2 PEG-40 Hydrogenated Castor Oil 0.7 0.7 0.7 0.5 0.5 0.5 glycerin 5 5 5 3 3 3 sorbitol 3.5 3.5 3.5 Polyquaternium-10 0.04 0.04 0.04 0.04 0.04 0.04 PEG-200 Hydrogenated Glyceryl Palmate 0.2 0.2 0.2 0.4 0.4 0.4 Alcohol Denat. 2.9 2.9 2.9 Decyl glucosides 2.9 2.9 2.9 2.9 2.9 2.9 Disodium Cocoyl Glutamate 2.3 2.3 2.3 1.3 1.3 1.3 Sodium Chloride 0.4 0.4 0.4 0.2 0.2 0.2 Sodium sulfate 0.2 0.2 0.2 0.1 0.1 0.1 1,2-Hexanediol 0.5 0.5 0.5 phenoxyethanol 0.8 0.8 0.8 Sodium benzoate 0.45 0.45 0.45 Propylene glycol 0.5 0.5 0.5 Panthenol, Glyceryl Glucoside, Nelumbium Speciosum Flower Extract, Tocopheryl Acetate, Prunus Amygdalus Dulcis Oil qs qs qs qs qs qs Citric Acid qs qs qs qs qs qs Aqua Ad 100 Ad 100 Ad 100 Ad 100 Ad 100 Ad 100 Total amount of surfactants 5.2 5.2 5.2 4.2 4.2 4.2 ¹ Sigma 10065, Aspergillus oryzae α-amylase, molecular weight about 50 kDa.

For the investigation of the foam obtained from the preparations, the preparations of Examples 1 to 3 were each filled into a conventional foam dispenser and the foam was dispensed in each case in 50 ml crucibles with an identical number of pump strokes.

A first comparison right after dispensing the foam is in the shown. Both illustration shows the example recipes Example 1 . Ex.2 and EX3 dar. The shows the same crucible 4 Hours after emptying the foam. The numbers on the crucible correspond to the corresponding example preparations. As it turns out, the foam of the example formulations according to the invention falls 2 and 3 less quickly together and thus does not dissolve so quickly.

In a second experiment, in each case 25 ml of the preparations Ex.1 . Ex.2 and EX3 into a 250 ml beaker. For each preparation, a cross-shaped magnetic stir bar with a cross diameter of 2.5 cm was added and the preparation was stirred for 5 minutes with an ICA RCT Basic magnetic stirrer at 1100 rpm. The shows photographs of the obtained foam volume of the three preparations in comparison. It turns out that the example recipes Ex.2 and EX3 have a significantly increased foam volume and are therefore better foamable.

In a third experiment, in each case 50 g of the preparations EX4 . Bsp.5 and Bsp.6 into a 250 ml beaker. Subsequently, all preparations were stirred with an automated IKA stirrer with three-blade propeller (IKA No. 1381) at 1000 revolutions per minute for 3 minutes. The shows photographs of the obtained foam volume of the three preparations in comparison. It turns out that the example recipes Bsp.5 and Bsp.6 have a significantly increased foam volume and are therefore better foamable.

In a fourth experiment, in each case the example preparation Ex.1 and Ex.2 foamed with a foam dispenser and the amount removed in each case placed on a black cardboard. Then a Petri dish was placed on the foam and pressed gently on the cardboard. Then the remaining foam was photographed between the Petri dish and the black cardboard (See ). This example of the invention showed Ex.2 a much more even foam formation. The bubbles formed were significantly more uniform in size compared to those of Ex.1 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 5723111 A [0008]
• EP 3145474 A1 [0008]

Claims (15)

Cosmetic cleaning preparation containing amylase and one or more surfactants, wherein the total amount of surfactants less than 12 wt .-%, preferably less than 10 wt .-%, more preferably less than 6 wt .-% and particularly preferably less than 5 wt. % Surfactants, based on the total weight of the cleaning preparation. Cosmetic cleaning preparation according to Claim 1 characterized in that the proportion of amylase in the cosmetic cleansing preparation 0.01 wt .-% to 5 wt .-%, preferably 0.05 wt .-% to 3.5 wt .-% and particularly preferably 0.1 wt. -% to 2 wt .-%, based on the total weight of the cleaning preparation is. Cosmetic cleansing preparation according to one of the preceding claims, characterized in that an α-amylase is chosen as the amylase, it being preferred if the α-amylase has been isolated from Aspergillus oryzae. Cosmetic cleaning preparation according to one of the preceding claims, characterized in that the amylase has a molecular weight of 40 kDa to 60 kDa, preferably 45 kDa to 55 kDa. Cosmetic cleaning preparation according to one of the preceding claims, characterized in that the total content of the surfactants in the cosmetic preparation at least 0.1 wt .-%, preferably at least 2 wt .-% and particularly preferably at least 3.5 wt .-%, based on the Total weight of the cleaning preparation is. Cosmetic cleaning preparation according to one of the preceding claims, characterized in that one or more anionic surfactants are contained as surfactants, wherein preferably anionic amino acid surfactants are included. Cosmetic cleaning preparation according to Claim 6 characterized in that the anionic amino acid surfactants are selected from the group of mono- or dicarboxylate salts of N-acylated glutamic acid, the monocarboxylate salts of N-acylated alanine, the monocarboxylate salts of N-acylated glycine, the monocarboxylate salts of N-acylated sarcosine, and mixtures thereof. Cosmetic cleaning preparation according to Claim 7 characterized in that as anionic surfactant, a mono- or dicarboxylate salts of N-acylated glutamic acid is selected, sodium cocoyl glutamate is preferably contained. Cosmetic cleaning preparation according to one of Claims 6 to 8th characterized in that the proportion of the anionic amino acid surfactants 0.5 wt .-% to 4 wt .-%, preferably 1 wt .-% to 3 wt .-%, based on the total weight of the cleaning preparation is. Cosmetic cleaning preparation according to one of the preceding claims, characterized in that one or more nonionic surfactants are contained, which are preferably selected from the group of alkyl glycosides. Cosmetic cleaning preparation according to Claim 10 characterized in that the proportion of alkyl glycosides 1 wt .-% to 6 wt .-%, preferably, 2 wt .-% to 4 wt .-%, based on the total weight of the cleaning preparation is. Cosmetic cleansing preparation according to one of the preceding claims, characterized in that the preparation contains PEG-40 Hydrogenated Castor Oil, wherein the proportion of PEG-40 Hydrogenated Castor Oil preferably from 0.2 wt .-% to 1 wt .-% based on the total weight the cleaning preparation is. Cosmetic cleaning preparation according to one of the preceding claims, characterized in that the preparation contains PEG-200 Hydrogenated Glyceryl Palmate, wherein the proportion of PEG-200 Hydrogenated Glyceryl Palmate preferably from 0.2 wt .-% to 0.6 wt .-% based on the total weight of the cleaning preparation. Use of amylase in a cosmetic cleansing preparation according to any one of Claims 1 to 13 to increase the foam volume after foaming, to increase the stability of foams after foaming the cleaning preparation and / or to form a foam with uniform bubble size. Use of amylase in a cosmetic cleansing composition to increase the foam volume during foaming, to increase the stability of foams after foaming the cleaning preparation and / or to form a foam with a uniform bubble size.

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