Cosmetic cleansing concentrate

Abstract

A cosmetic preparation.

Description

[0001] Cosmetic cleansing concentrate

[0002] The invention belongs to the cosmetic field and relates to a cleaning concentrate which is diluted with water before use.

[0003] The desire to look beautiful and attractive is inherent in human nature. Although the ideal of beauty has changed over time, the pursuit of a flawless appearance has always been a goal, as a pleasing appearance increases self-esteem and attraction to others. The condition and appearance of the skin play a significant role in achieving a beautiful and attractive appearance. A key component of daily skin care is cleansing, which involves the use of cosmetic cleansing products.

[0004] Conventional cleansing formulations are usually sold in the form of a liquid, aqueous formulation. Analyzing the ingredients of such a formulation, it can be seen that the formulation contains a significant amount of water. Typical examples of shower gels are disclosed in WO1994010975A1, WO1993021900A1, and WO2002005758A2.

[0005] Accordingly, significant quantities of water are transported from the supplier to the stores and then on to the customer to provide the customer with the cleaning formula of their choice. Given that most customers' homes are connected to the public water supply, it doesn't seem environmentally sensible to ship water to a location that has essentially unlimited access to water. By eliminating or reducing the amount of water in the formulations and shipping a concentrate in liquid or solid form, transportation costs and transport-related greenhouse gas emissions can be reduced.

[0006] Consequently, environmentally friendly cosmetic cleansing preparations can also be delivered to consumers in the form of concentrates. The consumer dissolves the concentrates in specified proportions with water to create a cosmetic cleansing preparation. This application method saves water in the production of the concentrates. This leads to a lower environmental impact due to weight minimization, as the consumer can usually add water at home.

[0007] The present application relates to liquid concentrates which are diluted by the consumer by adding predefined amounts of water before use.

[0008] Typical concentrates are described, among others, in WO2016172468A1.

[0009] However, difficulties can arise when preparing cleaning concentrates. Generally, a defined viscosity is required after the consumer adds a specified amount of water. Accordingly, the product should be able to be dispensed from a packaging in a standard manner. Suitable viscosities of this kind are in the range of 3000 to 5000 mPa s. Consequently, the cleaning concentrates must already contain thickening systems that allow automatic viscosity adjustment when diluted with the predefined amount of water.

[0010] Particularly when sodium lauryl ether sulfate (CAS 15826-16-1) is used as a surfactant, thickening is achieved by adjusting the salt or sodium chloride content of the preparation. A problem is that preparations containing sodium chloride can cause corrosion during production. If a preparation is available as a concentrate, the salt concentration is relatively higher than in conventional cleaning products, which have higher water contents. However, a large amount of sodium chloride is necessary to ensure sufficient thickening.

[0011] Consequently, approaches are needed to achieve higher viscosity with small amounts of salt in concentrates when the consumer dilutes the concentrates with a given amount of water.

[0012] Surprisingly, the present invention was able to address this problem.

[0013] The invention relates to a cosmetic concentrate comprising, based on the total weight of the concentrate, a) from 20 to 70 wt.% of a surfactant system comprising at least sodium laureth sulfate, b) sodium chloride, and c) 1,3-butanediol and / or 1,2-propanediol.

[0014] Surprisingly, it has been found that the combination according to the invention makes it possible to provide a concentrate that, when diluted with water, develops a viscosity within the desired range. Surprisingly, the addition of 1,3-butanediol and / or 1,2-propanediol leads to more effective salt thickening in the concentrate according to the invention, allowing the use of lower salt concentrations.

[0015] A further subject matter is a method for providing a cosmetic cleansing product comprising the steps a) providing the concentrate according to the invention b) adding a predefined amount of water to the concentrate c) mixing the water and the concentrate to form the cleansing product.

[0016] Another object of the invention is the use of 1,3-butanediol and / or 1,2-propanediol in a concentrate comprising from 20 to 70 wt.% of a surfactant system comprising at least sodium laureth sulfate and sodium chloride for thickening the concentrate upon addition of water.

[0017] Unless otherwise stated, all tests and measurements were conducted under "normal conditions." The term "normal conditions" refers to 20°C, 1013 hPa, and a relative humidity of 50%.

[0018] The term “skin” refers exclusively to human skin.

[0019] If weight percentages (wt%) are stated below without reference to a specific composition or mixture, these figures always refer to the total weight of the concentrate. If ratios of components / substances / groups of substances are disclosed below, these ratios refer to the weight ratios of the specified components / substances / groups of substances.

[0020] If weight percentage ranges for the components of the concentrate are given below, the disclosure of the present application also includes all individual values ​​in steps of 0.1 wt.% within these weight percentage ranges.

[0021] The terms "according to the invention," "advantageous according to the invention," "advantageous within the meaning of the present invention," etc., always refer within the scope of the present disclosure to the concentrate according to the invention as well as to the use and method according to the invention. The term "free from" within the meaning of the present disclosure means that the proportion of the substance mentioned does not exceed 0.1% by weight and, in particular, is 0% by weight, based on the total weight of the concentrate. Thus, inadvertent introduction through impurities should not lead to exclusion from the scope of protection.

[0022] Emulsifiers are all substances listed as "emulsifying agents" in the International Cosmetic Ingredient Dictionary and Handbook, Thirteenth Edition 2010 (ISBN 1-882621-47-6). Surfactants are all substances listed as "surfactants" in the International Cosmetic Ingredient Dictionary and Handbook, Thirteenth Edition 2010 (ISBN 1-882621-47-6).

[0023] If viscosity values ​​are given in this disclosure, all values ​​refer to a measurement at 25°C in a 150 ml wide-neck bottle (VWR No.: 807-0001) using a Rheomat R 123 from proRheo. The Rheomat R 123 from proRheo GmbH is a rotational viscometer, i.e. a measuring body rotates in the substance to be measured. The force required to rotate the measuring body in the sample at a specified speed is measured. The viscosity is calculated from this torque, the speed of the measuring body and the geometric dimensions of the measuring system used. The measuring body used is measuring body no. 1 (article no. 200 0191), suitable for a viscosity range up to 10,000 [mPa-s], speed range 62.5 min-1.

[0024] Where information is given in this disclosure regarding an average, this average always refers to arithmetic means.

[0025] Any information given in this disclosure regarding the molecular weight of polymers refers to a measurement by means of light scattering.

[0026] According to the invention, the concentrate contains 20 to 70 wt.% of a surfactant system comprising at least sodium laureth sulfate. It is advantageous according to the invention if the total proportion of the surfactant system, based on the total weight of the concentrate, is from 20 to 70 wt.%, preferably from 25 to 60 wt.%, and in particular from 35 to 50 wt.%, wherein at least sodium laureth sulfate is present.

[0027] The proportion of sodium laureth sulfate is advantageously from 4 to 40 wt.%, preferably from 7 to 35 wt.%, and in particular from 10 to 30 wt.%, based in each case on the total weight of the concentrate. By definition, all surfactants in the concentrate belong to the surfactant system, so no additional surfactants outside the surfactant system can be present.

[0028] It is advantageous according to the invention if at least one amphoteric and / or zwitterionic surfactant is included as an additional surfactant. Advantageously used amphoteric and / or zwitterionic surfactants are

[0029] - acyl / dialkylethylenediamine, in particular sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, disodium cocoamphodiacetate, sodium cocoamphomonoacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate and sodium acylamphopropionate;

[0030] N-alkylamino acids, in particular aminopropylalkylglutamide, alkylaminopropionic acid, sodium alkylimidodipropionate and lauroamphocarboxyglycinate;

[0031] Betaines, especially Coco Betaine, Cocoamidopropyl Betaine; and

[0032] - Sultaines, especially lauryl hydroxy sultaine.

[0033] Particularly advantageous are the amphoteric and / or zwitterionic surfactants known under the INCI names sodium cocoamphoacetate, disodium cocoamphodiacetate, sodium cocoamphopropionate, disodium cocoamphodipropionate, coco betaine, lauryl betaine, and / or cocamidopropyl betaine. From the above group, cocamidopropyl betaine is chosen as the most preferred amphoteric and / or zwitterionic surfactant.

[0034] It is particularly advantageous if Cocamidopropyl Betaine is present in a proportion of 4 to 20 wt.%, preferably in a proportion of 10 to 14 wt.%, based on the total weight of the concentrate.

[0035] Furthermore, it may be advantageous according to the invention if at least one further anionic surfactant is included. Other anionic surfactants that can be advantageously used according to the invention are, with the exception of sodium laureth sulfate, sulfuric acid esters, such as

[0036] Alkyl ether sulfate, with the exception of sodium laureth sulfate, in particular ammonium, magnesium, MIPA, TIPA lauryl ether sulfate, sodium myristyl ether sulfate and the substance known under the INCI name sodium C12-13 pareth sulfate;

[0037] Alkyl sulfates, in particular sodium, ammonium and TEA lauryl sulfate; as well as sulfonic acids and salts, such as acyl isethionates, in particular sodium / ammonium cocoyl isethionate;

[0038] - alkylarylsulfonates;

[0039] Alkylsulfonates, in particular sodium cocosmonoglyceride sulfate, sodium C12-14 olefinsulfonate, sodium laurylsulfoacetate and magnesium PEG-3 cocamide sulfate,

[0040] - Sulfosuccinates, in particular dioctyl sodium sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, disodium undecylenamido-MEA sulfosuccinate and PEG-5 lauryl citrate sulfosuccinate;

[0041] Other advantageously used anionic surfactants are acylamino acids and their salts, such as

[0042] - Acylglutamates, in particular sodium acylglutamate, di-TEA-palmitoylaspartate and sodium caprylic / capric glutamate;

[0043] Acylpeptides, especially palmitoyl-hydrolyzed milk protein, sodium cocoyl-hydrolyzed soy protein and sodium / potassium cocoyl-hydrolyzed collagen,

[0044] - Acyl sarcosinates, especially myristoyl sarcosine, TEA-lauroyl sarcosinate, sodium lauroyl sarcosinate and sodium cocoyl sarcosinate;

[0045] - acyltaurates, in particular sodium lauroyltaurate and sodium methylcocoyltaurate;

[0046] - Acyl lactylates, especially lauroyl lactylate, caproyl lactylate;

[0047] - Acylalaninates;

[0048] - Acylglycinates, especially sodium cocoylglycinate.

[0049] Other anionic surfactants that can be used advantageously are the following:

[0050] Groups of carboxylic acids and carboxylic acid derivatives:

[0051] - carboxylic acids, in particular lauric acid, aluminum stearate, magnesium alkanolate and zinc undecylenate;

[0052] Ester carboxylic acids, for example calcium stearoyl lactylate, laureth-6 citrate and sodium PEG-4 lauramide carboxylate;

[0053] Ether carboxylic acids, for example sodium laureth-13 carboxylate and sodium PEG-6 cocamide carboxylate; as well as phosphoric acid esters and salts, such as DEA-oleth-10 phosphate and dilaureth-4 phosphate.

[0054] Furthermore, it is advantageous if at least one nonionic surfactant is contained in the concentrate. Advantageous nonionic surfactants are: fatty acid alkanolamides of the general formula (II) where R 3a linear or branched, saturated or unsaturated alkyl or alkenyl radical having 8 to 24 carbon atoms, ' each represents a hydrogen atom or a -(CH2) n OH group in which n can take the numbers 2 or 3, with the proviso that at least one of the groups R 4 a -(CH2)nOH group, for example Cocamide MEA / DEA / MI PA;

[0055] - Addition products of ethylene oxide to fatty acid alkanolamides

[0056] - Cs-Cso fatty acid mono- and / or diesters of addition products of 1 to 50 mol of ethylene oxide with glycerol;

[0057] Addition products of 2 to 50 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide with linear or branched fatty alcohols having 8 to 30 carbon atoms, with fatty acids having 8 to 30 carbon atoms and with alkylphenols having 8 to 15 carbon atoms in the alkyl group; and

[0058] - Alkyl polyglycosides, such as preferably lauryl glucoside, decyl glucoside, caprylyl / capryl glucoside and coco-glucoside.

[0059] Advantageous embodiments of the invention are characterized in that they contain alkyl polyglycosides, especially decyl glucosides, caprylyl / capryl glucosides, and / or coco-glucosides, as nonionic surfactants. If the cosmetic cleansing concentrates according to the invention contain alkyl polyglycosides, especially decyl glucosides, caprylyl / capryl glucosides, and / or coco-glucosides, it is preferred if the proportion of alkyl polyglycosides is from 2% to 20% by weight, and preferably from 3% to 10% by weight, based on the total weight of the cleansing concentrate.

[0060] According to the invention, the concentrate comprises sodium chloride. It is advantageous according to the invention if the proportion of sodium chloride is from 1 wt.% to 10 wt.%, preferably from 2 to 7 wt.%, and particularly preferably from 3.5 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

[0061] Furthermore, the concentrate according to the invention advantageously comprises 1,3-butanediol. It is preferred if the proportion of 1,3-butanediol is from 1 wt.% to 17 wt.%, preferably from 2 wt.% to 7 wt.%, and particularly preferably from 3.1 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

[0062] Furthermore, the concentrate according to the invention advantageously comprises 1,2-propanediol. It is preferred if the proportion of 1,2-propanediol is from 1 wt.% to 17 wt.%, preferably from 2 wt.% to 7 wt.%, and particularly preferably from 3.1 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

[0063] Furthermore, the concentrate according to the invention advantageously comprises 1,2-propanediol and 1,3-butanediol. It is preferred if the total proportion of 1,2-propanediol and 1,3-butanediol is from 1 wt.% to 17 wt.%, preferably from 2 wt.% to 7 wt.%, and particularly preferably from 3.1 wt.% to 5.6 wt.%, based on the total weight of the cleaning concentrate.

[0064] Furthermore, it is advantageous if additives are included to preserve the concentrate. Sodium benzoate and / or sodium salicylate are particularly preferred. Consequently, it is preferred if sodium benzoate is included, with it being further preferred if the total sodium benzoate content is from 1.5 to 3.0 wt.%, based on the total weight of the concentrate. It is preferred if sodium salicylate is included, with it being further preferred if the total sodium salicylate content is from 1.3 to 2.5 wt.%, based on the total weight of the concentrate.

[0065] Furthermore, it is advantageous if the concentrate contains citric acid and / or its corresponding salts. If these are present, it is preferred if their total content is from 0.5 wt.% to 5.5 wt.%, preferably from 1.5 wt.% to 4.5 wt.%, and particularly preferably from 2.1 wt.% to 3.5 wt.%, based on the total weight of the cleaning concentrate.

[0066] Preferred embodiments of the invention are further characterized by containing at least one pearlescent agent. These pearlescent agents are preferably selected from the group consisting of glycol distearate, glyceryl stearate, PEG-3 distearate, and mixtures thereof.

[0067] If one or more pearlescent agents selected from the group consisting of glycol distearate, glyceryl stearate, PEG-3 distearate, and mixtures thereof are present, it is preferred if the total proportion of these is from 0.5% by weight to 4.5% by weight, and preferably from 1.0% by weight to 3.0% by weight, based on the total weight of the cleaning concentrate. Surprisingly, it was found that 3 days after diluting the concentrates according to the invention, the pearlescent appearance in the formula still had a homogeneous appearance. For this purpose, the prepared formula was stored undisturbed for 3 days after thorough mixing.

[0068] Furthermore, the concentrate preferably comprises less than 45% by weight, particularly preferably less than 43% by weight, and most preferably less than 42% by weight of water, based on the total weight of the concentrate. The water content of the concentrate is advantageously at least 10% by weight, preferably at least 20% by weight, and particularly preferably at least 25% by weight, based on the total weight of the preparation.

[0069] The concentrate of the invention may further comprise one or more perfume substances that are liquid under normal conditions. Advantageously, the total proportion of the perfume substances that are liquid under normal conditions is from 1.5 to 4.5 wt.%, based on the total weight of the concentrate.

[0070] It is further preferred within the meaning of the invention if the concentrate is free from pentylene glycol.

[0071] To prepare a cosmetic cleansing preparation, the concentrate according to the invention is advantageously mixed with water in a weight ratio (concentrate:water) of 1:10 to 1:1, preferably 1:8 to 1:1.5, and particularly preferably 1:4 to 1:2. Surprisingly, it was found that even manual mixing by shaking allowed for a particularly effective dissolution of the concentrate in water.

[0072] Furthermore, the preparations according to the invention may comprise further additives and active ingredients, provided that these are not incompatible with the preparations according to the invention.

[0073] Examples:

[0074] The following examples are intended to illustrate the invention without intending to limit the invention to these examples. The numerical values ​​used in the examples are percentages by weight based on the total weight of the respective preparations.

[0075] Examples according to the invention are abbreviated as Ex.X, where X also stands for a consecutive number. The formulations marked below with the abbreviation Comp.X, where X is a consecutive number, are comparative examples not according to the invention.

[0076] The following recipe was initially provided for a comparative test.

[0077] Tab.1 transparent formulation

[0078]

[0079] It is stated above that water is included as a "residual component up to 100%." ​​This means that the respective formulation adds up to 100%, with the unspecified portion being balanced by water.

[0080] Tab.2 opaque formulation.

[0081] Additional salt was added to each of the formulations listed in Tables 1 and 2. Additionally, water was added to produce a conventional cleaning product. 24 hours after preparation of the cleaning product, the viscosity of the respective mixture was measured using the procedure listed above. Table 3 below shows the respective mixing ratios:

[0082] Tab.3 Mixing ratios for viscosity measurement (all data in wt.% based on the weight of the cleaning product obtained):

[0083] The viscosity values ​​obtained are listed in Table 4 for all concentrates tested.

[0084] Table 4 shows the amount of NaCI added to the base amount already contained in the preparations.

[0085] Table 4

[0086] It was surprisingly found that the diols according to the invention enable effective viscosity buildup even at lower salt contents. Low salt contents, in particular, were used with propylene glycol. Pentylene glycol, on the other hand, cannot be used because it does not allow for sufficient viscosity buildup.

[0087] Below are listed other concentrates that are mixed with water to produce cosmetic cleansing products. The mixing ratio of concentrate to water is generally between 1:4 and 1:2. Table 5: Opaque example formulations

[0088]

[0089] Tab.6: transparent concentrates Tab.7: opaque example formulations

[0090] Tab.8: transparent example recipes

Claims

Claims 1 . Cosmetic concentrate comprising, based on the total weight of the concentrate, a) from 20 to 70 wt.% of a surfactant system comprising at least sodium laureth sulfate, b) sodium chloride, and c) 1,3-butanediol and / or 1,2-propanediol.

2. Concentrate according to claim 1, characterized in that the total proportion of the surfactant system, based on the total weight of the concentrate, is from 20 to 70 wt.%, preferably from 25 to 60 wt.% and in particular from 35 to 50 wt.%.

3. Concentrate according to one of the preceding claims, characterized in that the proportion of sodium laureth sulfate is advantageously from 4 to 40 wt.%, preferably from 7 to 35 wt.% and in particular from 10 to 30 wt.%, in each case based on the total weight of the concentrate.

4. Concentrate according to one of the preceding claims, characterized in that the surfactant system comprises at least one amphoteric and / or zwitterionic surfactant.

5. Concentrate according to claim 4, characterized in that sodium cocoamphoacetate, disodium cocoamphodiacetate, sodium cocoamphopropionate, disodium cocoamphodipropionate, coco betaine, lauryl betaine and / or cocamidopropyl betaine is contained as amphoteric and / or zwitterionic surfactant.

6. Concentrate according to claim 4, characterized in that it contains cocamidopropyl betaine and the proportion of cocamidopropyl betaine is from 4 to 20% by weight, preferably in a proportion of 10 to 14% by weight, based on the total weight of the concentrate.

7. Concentrate according to one of the preceding claims, characterized in that it contains at least one non-ionic surfactant.

8. Concentrate according to claim 7, characterized in that at least one alkyl polyglycoside is contained as non-ionic surfactant, this being preferably selected from decyl glucoside, caprylyl / capryl glucoside and / or coco-glucoside.

9. Concentrate according to claim 8, characterized in that the proportion of alkyl polyglycosides is from 2 wt.% to 20 wt.% and preferably from 3 wt.% to 10 wt.%, based on the total weight of the cleaning concentrate.

10. Concentrate according to one of the preceding claims, characterized in that the proportion of sodium chloride is from 1 wt.% to 10 wt.%, preferably from 2 to 7 wt.% and particularly preferably from 3.5 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

11. Concentrate according to one of the preceding claims, characterized in that the proportion of 1,3-butanediol is from 1 wt.% to 17 wt.%, preferably from 2 wt.% to 7 wt.% and particularly preferably from 3.1 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

12. Concentrate according to one of the preceding claims, characterized in that the proportion of 1,2-propanediol is from 1 wt.% to 17 wt.%, preferably from 2 wt.% to 7 wt.% and particularly preferably from 3.1 wt.% to 5.7 wt.%, based on the total weight of the cleaning concentrate.

13. Concentrate according to one of the preceding claims, characterized in that the concentrate is free from pentylene glycol.

14. A method for providing a cosmetic cleansing product comprising the steps of a) providing the concentrate according to any one of claims 1 to 13 b) adding a predefined amount of water to the concentrate c) mixing the water and the concentrate to form the cleansing product.

15. The method according to claim 14, characterized in that the concentrate is mixed with water in a weight ratio of 1:10 to 1:1, preferably 1:8 to 1:1.5 and particularly preferably 1:4 to 1:

2.

16. Use of 1,3-butanediol and / or 1,2-propanediol in a concentrate comprising a. from 20 to 70 wt. % of a surfactant system comprising at least sodium laureth sulfate b. and sodium chloride for thickening the concentrate upon addition of water.

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