Thickening of cleaning preparations containing α-terpineol

Abstract

The present invention relates to cosmetic cleaning preparations containing α-terpineol.

Description

[0001] Thickening agent for cleaning preparations containing α-terpineol

[0002] The present invention relates to cosmetic cleansing preparations containing α-terpineol (INCI: Alpha-Terpineol).

[0003] A person's outward appearance can be influenced and enhanced through the use of cosmetic products. Regular use of cleansing and care products ensures that people feel attractive, beautiful, and comfortable in their surroundings, and radiate this outwards.

[0004] The cleansing process serves the purpose of loosening and rinsing away dirt such as sweat residue or accumulated skin cells. For this purpose, shower gels and cleansing products typically contain anionic, non-ionic, and / or amphoteric surfactants. Since, in addition to removing external dirt particles, skin particles can also be removed, this can lead to dry skin or skin irritation. Therefore, it is important that a shower gel also cares for the skin. This can be achieved by using mild cleansing products and adding agents to replenish the skin's natural oils or moisturize it.

[0005] For a cleansing preparation to be used by consumers as a shower gel, the aqueous-based mixtures must be thickened to achieve a gel-like consistency. This consistency is crucial for consumers in terms of product dispensing, dosage, and distribution on the skin. Gel formulations have proven to best combine these properties, as they can be dispensed from the packaging with minimal effort, do not run when applied to the skin, and spread easily. While increasing the surfactant content can convert cosmetic cleansers into gels, this can lead to a less gentle product and potentially irritate the skin.

[0006] For this reason, shower gels contain thickening agents that maintain the mildness of the cleansing preparations. The principle of thickening is based on the thickening agent binding unbound water. Thickening agents can also exhibit network effects, which also leads to increased viscosity. Therefore, macromolecules such as polysaccharides, silicones, or acrylate-containing polymers are often used as thickening agents to adjust the viscosity of a shower gel.

[0007] For environmental reasons, there is a growing effort to avoid using homo- or copolymers of acrylic acid in cleaning products. So-called polyquaternium Z polymers (INCI name) are frequently used in cleaning products, where Z is an integer between 1 and 100. Some of these compounds (e.g., polyquaternium-5, polyquaternium-7, and polyquaternium-14) belong to the group of homo- or copolymers of acrylic acid, methacrylic acid, or their derivatives. The biodegradability of these substances is not yet fully understood, and consumers desire products free of homo- or copolymers of acrylic acid. Therefore, salt thickeners are increasingly being used, and there is a general need for other thickening options for shower gels.

[0008] The gel consistency of a shower gel is determined by its viscosity and can be analyzed by examining a defined quantity of the cleaning preparation with a rheomat (model R 123 from proRheo). The viscosity of a substance can be determined using the measuring element employed in the device. A cleaning preparation exhibits increased viscosity if it exceeds 4000 mPa*s.

[0009] Consumers also value the fact that the consistency of a cleaning product does not change during storage. Therefore, it is desirable for a product to maintain a stable long-term viscosity.

[0010] There is particular interest in finding thickening agents that can adjust the gel consistency of a cleaning preparation to achieve a higher viscosity. Furthermore, anionic surfactants in the form of sulfates, especially sodium lauryl ether sulfate and / or ammonium lauryl ether sulfate, are increasingly used in shower gels. The search for additional thickening agents reveals that cleaning preparations based on sulfate-containing surfactants, in particular, require the addition of further thickening agents.

[0011] Consequently, the object of the present invention was to provide cosmetic cleansing preparations that are free of acrylate-containing homo- or copolymers and exhibit increased viscosity. Conventional cosmetic cleansing preparations consist, among other things, of

[0012] The cleaning preparations are known from EP1647591 A1 or EP2768474 A2. These preparations typically contain anionic and amphoteric surfactants. However, the disclosed preparations did not provide any indication of the present invention.

[0013] Surprisingly for those skilled in the art, it has now been found that the emerging problem of increasing viscosity without the use of acrylate-containing homo- or copolymers could be solved by the present invention.

[0014] The present invention relates to a cosmetic cleansing preparation comprising, based on the total weight of the cleansing preparation, a) α-terpineol; b) at least one anionic surfactant; c) at least one amphoteric and / or zwitterionic surfactant; and d) at least one non-ionic surfactant, characterized in that it does not contain any homo- or copolymers of acrylic acid.

[0015] Surprisingly, the combination of the invention, or rather the cleaning preparations according to the invention, exhibited an increased viscosity after production. Surprisingly, cleaning preparations with increased viscosity were obtained that contained sulfate-based surfactants and, moreover, did not require the use of acrylate-containing homopolymers or copolymers. Furthermore, these cleaning preparations according to the invention surprisingly exhibited a stable long-term viscosity.

[0016] Any viscosity values ​​given in this disclosure refer to measurements taken at 25°C in a 150 ml wide-mouth bottle (VWR No.: 807-001) using the Rheomat R 123 from proRheo. The Rheomat R 123 from proRheo GmbH is a rotational viscometer, meaning that a measuring element rotates within the substance being measured in a stationary measuring vessel. The force required to rotate the measuring element in the sample at a predetermined speed is measured. The viscosity is then calculated from this torque, the rotational speed of the measuring element, and the geometric dimensions of the measuring system. The measuring element used is No. 1 (article no. 200 0191), suitable for a viscosity range up to 10,000 mPa s, with a rotational speed of 62.5 rpm. -1The viscosity was always measured 24 hours after preparation. To determine the long-term viscosity stability, the preparations were stored in a constant temperature chamber at 25 °C and 1013 hPa (with a relative humidity of 26% RH), and the viscosity was measured as previously described after 30 days, 60 days, 120 days, and 240 days.

[0017] Where weight percentages (wt%) are given below without reference to a specific composition or mixture, these percentages always refer to the total weight of the cosmetic cleansing preparation. Where ratios of components / substances / groups of substances are disclosed below, these ratios refer to the weight ratios of the components / substances / groups of substances mentioned.

[0018] The terms “according to the invention”, “advantageous according to the invention”, “advantageous in the sense of the present invention”, etc., always refer within the scope of the present disclosure to the preparation according to the invention, the use according to the invention and the method according to the invention.

[0019] Unless otherwise stated, all tests were conducted under standard conditions. "Standard conditions" means 20°C, 1013 hPa, and a relative humidity of 50%.

[0020] When the term skin is used, it preferably refers to human skin.

[0021] The cosmetic cleansing preparation according to the invention is characterized in that it contains at least one anionic and / or non-ionic surfactant. Anionic surfactants generally have carboxylate, phosphate, sulfate, or sulfonate groups as functional groups. In aqueous solution, they form negatively charged organic ions in acidic or neutral environments.

[0022] Anionic surfactants that can be used advantageously according to the invention are sulfuric acid esters, such as

[0023] - Alkyl ether sulfate, in particular sodium, ammonium, magnesium, MIPA, TIPA lauryl ether sulfate, sodium myristyle ether sulfate and the substance known under the INCI name sodium C12-13 pareth sulfate;

[0024] - Alkyl sulfates, in particular sodium, ammonium and TEA lauryl sulfate; as well as sulfonic acids and salts, such as

[0025] - Acyl isethionates, especially sodium / ammonium cocoyl isethionate;

[0026] - Alkylarylsulfonates; - Alkylsulfonates, in particular sodium cocosmonoglyceride sulfate, sodium C12-14 olefin sulfonate, sodium lauryl sulfoacetate and magnesium PEG-3 cocamide sulfate, sulfosuccinates, in particular dioctyl sodium sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, disodium undecylenamido-MEA sulfosuccinate and PEG-5 lauryl citrate sulfosuccinate;

[0027] Other advantageous anionic surfactants are acylamino acids and their salts, such as

[0028] - Acylglutamates, in particular sodium acylglutamate, di-TEA palmitoylaspartate and sodium caprylic / capric glutamate;

[0029] - Acyl peptides, in particular palmitoyl-hydrolyzed milk protein, sodium cocoyl-hydrolyzed soy protein and sodium / potassium cocoyl-hydrolyzed collagen,

[0030] - Acyl sarcosinates, especially myristoyl sarcosine, TEA-lauroyl sarcosinate, sodium lauroyl sarcosinate and sodium cocoyl sarcosinate;

[0031] - Acyltaurates, especially sodium lauroyltaurate and sodium methylcocoyltaurate;

[0032] - Acyl lactylates, especially lauroyl lactylate, caproyl lactylate;

[0033] - Acylalaninates;

[0034] - Acylglycinates, especially sodium cocoylglycinate.

[0035] Other advantageous anionic surfactants are the following groups of carboxylic acids and carboxylic acid derivatives:

[0036] Carboxylic acids, in particular lauric acid, aluminium stearate, magnesium alkanolate and zinc undecylenate;

[0037] Ester carboxylic acids, for example calcium stearoyl lactylate, laureth-6 citrate and sodium PEG-4 lauramide carboxylate;

[0038] 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.

[0039] It is particularly advantageous if the cosmetic cleaning preparation according to the invention contains one or more anionic surfactants according to formula (I)

[0040] RO-(CH2CH2O)x-(CH2-CHR 1 O) y -(CH2CH2O)z-SO3- M + (I) contains, characterized in that

[0041] R is a linear or branched Cs-Cis alkyl group or mixtures of different linear or branched C8-Ci8 alkyl groups; R 1 a methyl, ethyl or mixtures thereof;

[0042] M + a cation selected from the group consisting of alkali metals, NH4 + and HNR 2 3 + is, where R 2 selected is from the group consisting of linear or branched alkyl groups, CH2CH2OH and CH2CH(OH)CH3; x is an integer in the range of 0 - 3; y is an integer in the range of 0 - 10; and z is an integer in the range of 0 - 30.

[0043] Particularly preferred surfactants of formula (I) are selected from the group consisting of sodium laureth sulfate and / or ammonium laureth sulfate. If the cosmetic preparation according to the invention contains an anionic surfactant according to formula (I), preferably sodium laureth sulfate and / or ammonium laureth sulfate, it is preferred that the proportion of these anionic surfactants is from 0.5 wt.% to 8.0 wt.%, preferably from 2.0 wt.% to 7.5 wt.%, and particularly preferably from 4.0 wt.% to 7.0 wt.% based on the total weight of the cosmetic preparation. Particularly advantageous are sodium laureth sulfate and / or ammonium laureth sulfate contained in a proportion of 0.5 wt.% to 8.0 wt.%, preferably 2.0 wt.% to 7.5 wt.% and particularly preferably 4.0 wt.% to 7.0 wt.% based on the total weight of the cosmetic preparation.It is particularly advantageous if no other anionic surfactants are included besides sodium laureth sulfate. Embodiments intended to provide particularly effective cleaning performance are advantageously characterized by the inclusion of anionic surfactants and the omission of non-ionic surfactants.

[0044] Furthermore, it is advantageous if at least one non-ionic surfactant is included in the cleaning preparation. Advantageous non-ionic surfactants to be used are: fatty acid alkanolamides of general formula (II) where R 3 a linear or branched, saturated or unsaturated alkyl or alkenyl group with 8 to 24 carbon atoms, R 4 each represents a hydrogen atom or a - (CH2)nOH 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) nThe 0H group is, for example, Cocamide MEA / DEA / MIPA;

[0045] - Addition products of ethylene oxide to fatty acid alkanolamides; Cs-Cso fatty acid mono- and / or diesters of addition products of 1 to 50 mol of ethylene oxide to glycerol;

[0046] - Addition products of 2 to 50 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide to linear or branched fatty alcohols with 8 to 30 carbon atoms, to fatty acids with 8 to 30 carbon atoms, and to alkylphenols with 8 to 15 carbon atoms in the alkyl group; and

[0047] - Alkyl polyglycosides, such as preferably lauryl glucoside, decyl glucoside and coco-glucoside.

[0048] Advantageous embodiments of the invention are characterized in that they contain alkyl glycosides, specifically decyl glucosides and / or coco-glucosides, as nonionic surfactants. If the cosmetic cleansing preparation according to the invention contains alkyl polyglycosides, specifically decyl glucosides and / or coco-glucosides, it is preferred that the proportion of the alkyl polyglycosides is from 0.1 wt.% to 5.0 wt.%, preferably from 0.5 wt.% to 3.0 wt.%, and particularly preferably from 0.7 wt.% to 1.5 wt.%, based on the total weight of the cleansing preparation.

[0049] Furthermore, the cosmetic cleansing preparation according to the invention contains one or more amphoteric and / or zwitterionic surfactants. Advantageously suitable amphoteric and / or zwitterionic surfactants are:

[0050] - Acyl- / dialkylethylenediamine, in particular sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, disodium cocoamphodiacetate, sodium cocoamphomonoacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate and sodium acylamphopropionate;

[0051] N-Alkyl amino acids, in particular aminopropylalkylglutamide, alkylaminopropionic acid, sodium alkylimidodipropionate and lauroamphocarboxyglycinate;

[0052] Betaine, in particular Coco Betaine, Cocoamidopropyl Betaine; and Sultaine, in particular Lauryl Hydroxy Sultaine.

[0053] 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 selected as the most preferred amphoteric and / or zwitterionic surfactant.

[0054] Advantageously, the proportion of amphoteric and / or zwitterionic surfactants, in particular the amphoteric and / or zwitterionic surfactants previously listed as particularly advantageous, in the cosmetic cleaning preparation according to the invention is 0.5 to 5.0 wt. %, preferably 1.0 wt. %, and particularly preferably 2.0 wt. %, to 4.0 wt. %, based on the total weight of the cleaning preparation.

[0055] Advantageous embodiments of the invention are therefore characterized in that cocamidopropyl betaine is contained in the cosmetic cleansing preparation according to the invention in a proportion of 0.5 to 5.0 wt.%, preferably 1.0 wt.% to 4.5 wt.%, and particularly preferably 2.0 wt.% to 4.0 wt.%, based on the total weight of the cleansing preparation. Within these embodiments, it is further particularly preferred if no other amphoteric and / or zwitterionic surfactants are included besides cocamidopropyl betaine.

[0056] According to the invention, the cleaning preparation advantageously comprises α-terpineol. If α-terpineol is included, it is advantageous if the proportion of α-terpineol is from 0.0001 wt.% to 3.0 wt.%, preferably from 0.01 wt.% to 2.0 wt.%, and particularly preferably from 0.1 wt.% to 1.1 wt.% based on the total weight of the preparation.

[0057] It was extremely surprising to those skilled in the art that even with the addition of small amounts of α-terpineol, ranging from 0.0001 wt.%, 0.001 wt.%, 0.01 wt.%, 0.1 wt.% up to 1.0 wt.%, the thickening effect of the cleaning preparation could be observed and measured. Advantageous aspects of the invention include α-terpineol in a total content of 0.0001 wt.% to 3.0 wt.%, preferably from 0.001 wt.% to 1.2 wt.%, and particularly preferably from 0.1 wt.% to 0.4 wt.%, based on the total weight of the preparation. Surprisingly, effects according to the invention were also observed when only small amounts of α-terpineol were present. One embodiment comprises α-terpineol in a total content of 0.0001 wt.% to 0.01 wt.%, preferably 0.0002 wt.% to 0.005 wt.%, more preferably 0.0005 wt.% to 0.002 wt.%, and particularly preferably 0.0007 wt.% to 0.001 wt.%, based on the total weight of the preparation.Furthermore, the cosmetic cleansing preparations of the invention are preferably characterized in that they do not contain polymers obtained from homo- or copolymerization with acrylic acid and / or methacrylic acid, and do not contain polymers designated as polyquaternium-Z according to the INCI name, where Z is an integer in the range of 1 to 100. In this way, cleansing preparations can be provided that meet ecological requirements.

[0058] In particular, it is advantageous if the homo- or copolymers of acrylic acid and / or methacrylic acid known under the INCI names, polyquaternium-7, are not included.

[0059] According to the invention, the cleaning preparation advantageously comprises sodium chloride. If sodium chloride is included, the proportion of sodium chloride is advantageously in the range of 0.01 to 1.2 wt.%, preferably 0.05 to 1.0 wt.%, and particularly preferably 0.09 to 0.7 wt.% based on the total weight of the preparation.

[0060] Furthermore, it is advantageous if the cosmetic cleaning preparations according to the present invention contain water as a cosmetic carrier, wherein water is advantageously contained in a proportion of 70 wt.% to 92 wt.%, preferably 75 wt.% to 90 wt.% and particularly preferably 80 wt.% to 88 wt.% based on the total weight of the cleaning preparation.

[0061] Furthermore, it is advantageous in the sense of the present invention if the preparation is free of silicone oils.

[0062] The preservatives commonly used in cosmetics can be employed to preserve the present cosmetic cleansing preparations. The use of acid-based preservatives, such as those used in the food industry, is advantageous. These include, for example, benzoic acid and / or salicylic acid and / or their salts. The inclusion of sodium benzoate is particularly preferred, with the proportion of sodium benzoate preferably being in the range of 0.2 to 0.65 wt.%, more preferably 0.3 to 0.55 wt.%, and most preferably 0.4 to 0.5 wt.% based on the total weight of the preparation.

[0063] Furthermore, it has proven advantageous if the preparation comprises at least citric acid or its salts. If citric acid or its salts are included, it is advantageous if the total proportion of these components is 0.2 to 1.0 wt.%, preferably 0.4 to 0.9 wt.%, and particularly preferably 0.5 to 0.8 wt.% based on the total weight of the cleaning preparation.

[0064] The cleaning preparations according to the invention can advantageously contain opacifiers. Opacifiers are water-insoluble, mostly microparticulate substances that are suspended in water and reflect light particularly well, giving the cleaning preparations a milky or cloudy appearance. The opacifiers according to the invention are selected from the group consisting of glycol distearate, glyceryl stearate, PEG-3 distearate, and mixtures thereof.

[0065] If glycol distearate is included, it is advantageous if the total glycol distearate content is from 0.1 wt.% to 1.0 wt.%, preferably from 0.3 wt.% and particularly preferably from 0.5 wt.%, based on the total weight of the preparation.

[0066] Furthermore, the cleaning preparations according to the invention may contain other substances selected from the group consisting of glycerin, propanediol and sorbitol.

[0067] Furthermore, the cleaning preparations may advantageously contain substances selected from the group consisting of vitamin E, vitamin C, almond oil, grapeseed oil, sunflower oil, soybean oil, shea butter, panthenol and / or stearic acid, in accordance with the invention.

[0068] If glycerin is included, it is advantageous if the total glycerin content is 0.01 to 1.0 wt.%, preferably 0.05 to 0.5 wt.% and particularly preferably 0.07 to 0.1 wt.%, based on the total weight of the preparation.

[0069] The cleaning preparation of the invention is advantageously characterized in that it has a viscosity of less than 10,000 mPa s under normal conditions, more preferably less than 9,000 mPa s, more preferably less than 8,000 mPa s, and particularly preferably less than 7,000 mPa s. Furthermore, it is advantageous if the cosmetic preparation has a viscosity of at least 2,000 mPa s, more preferably at least 3,500 mPa s, more preferably at least 4,000 mPa s, and particularly preferably at least 4,500 mPa s. Accordingly, the viscosity of the cosmetic preparation is advantageously 2000 to 10000 mPa s, more preferably 3500 to 9000 mPa s, more preferably 4000 to 8000 mPa s, and particularly preferably 4500 mPa s to 7000 mPa s. It was surprisingly found that preparations exhibiting the increased viscosity described above can be obtained by using the invention.The use of this invention makes the appearance of the preparation significantly more appealing to the consumer.

[0070] Comparative experiments and examples

[0071] The following examples are intended to illustrate the present invention without limiting it. Unless otherwise stated, all quantities, proportions, and percentages are based on the weight and total quantity or total weight of the preparations.

[0072] The following formulations were prepared for the comparative tests. Formulations Cf. 1 to Cf. 6 are not according to the invention, while Ex. 1 and Ex. 2 are according to the invention.

[0073] The cleaning preparations listed above were produced and their properties investigated in a comparative test. For this purpose, the viscosity of the cleaning preparations was measured after 1 day, 30 days, 60 days, and 120 days following their production.

[0074] (See description for details on how to perform the viscosity measurement). The viscosity measurements show that the addition of α-terpineol alone, compared to preparations without α-terpineol, leads to a surprising thickening of the cleaning solution. Furthermore, cleaning solutions containing α-terpineol exhibit high long-term viscosity. Surprisingly, preparations containing terpinoien or α-phellandrene do not show this thickening effect, but rather a reduction in viscosity. It is also evident that cleaning solutions without α-terpineol do not exhibit stable long-term viscosity. The following examples are intended to further illustrate the invention:

[0075]

Claims

Patent claims 1. A cosmetic cleansing preparation comprising, based on the total weight of the preparation, a. at least one anionic surfactant; b. at least one amphoteric and / or zwitterionic surfactant; c. at least one non-ionic surfactant and d. α-terpineol, characterized in that it contains no homo- or copolymers of acrylic acid.

2. Cleaning preparation according to claim 1 characterized in that one or more anionic surfactants according to formula (I) RO-(CH2CH2O)x-(CH2-CHR 1 O)y-(CH2CH2O)z-SO3- M + (I) are included, characterized in that R is a linear or branched Cs-Cis alkyl group or mixtures of different linear or branched C8-Ci8 alkyl groups; R 1 a methyl, ethyl or mixtures thereof; M + a cation selected from the group consisting of alkali metals, NH4 + and HNR 2 3 +is, where R 2 selected is from the group consisting of linear or branched alkyl groups, CH2CH2OH and CH2CH(OH)CH3; x is an integer in the range of 0 - 3; y is an integer in the range of 0 - 10; and z is an integer in the range of 0 - 30.

3. Cleaning preparation according to one of the preceding claims, characterized in that it contains sodium laureth sulfate and / or ammonium laureth sulfate, wherein it is preferred that the proportion of these anionic surfactants is from 0.5 wt.% to 8.0 wt.%, preferably from 2.0 wt.% to 7.5 wt.%, and particularly preferably from 4.0 wt.% to 7.0 wt.% based on the total weight of the cosmetic preparation.

4. Cleaning preparation according to any one of the preceding claims 1 to 3, characterized in that it contains alkyl polyglycosides, in particular decyl glucosides and / or coco-glucosides, as non-ionic surfactants.

5. Cleaning preparation according to claim 4, characterized in that it contains decyl glucosides and / or coco-glucosides, wherein the proportion of the alkyl polyglycosides is from 0.1 wt.% to 5.0 wt.%, preferably from 0.5 wt.% to 3.0 wt.% and particularly preferably from 0.7 wt.% to 1.5 wt.%, based on the total weight of the cleaning preparation.

6. Cleaning preparation according to one of the preceding claims, characterized in that it contains the following as amphoteric and / or zwitterionic surfactants: Sodium Cocoamphoacetate, Disodium Cocoamphodiacetate, Sodium Cocoamphopropionate, Disodium Cocoamphodipropionate, Coco Betaine, Lauryl Betaine and / or Co-camidopropyl Betaine.

7. Cleaning preparation according to one of the preceding claims, characterized in that cocamidopropyl betaine is present in a proportion of 0.5 to 5.0 wt.%, preferably from 1.0 wt.% to 4.5 wt.% and particularly preferably of 2.0 wt.% to 4.0 wt.%, based on the total weight of the cleaning preparation, wherein it is particularly preferred if, in addition to cocamidopropyl betaine, no other amphoteric and / or zwitterionic surfactants are included.

8. Cleaning preparation according to one of the preceding claims, characterized in that the proportion of α-terpineol is from 0.0001 wt.% to 3.0 wt.%, preferably 0.01 wt.% to 2.0 wt.% and particularly preferably 0.1 wt.% to 1.1 wt.%, based on the total weight of the preparation.

9. Cleaning preparation according to one of the preceding claims, characterized in that it does not contain any homo- or copolymers of acrylic acid and / or methaacrylic acid, in particular polyquaternium-7.

10. Cleaning preparation according to one of the preceding claims, characterized in that it contains sodium chloride, wherein it is advantageous if the proportion of sodium chloride is from 0.01 to 1.2 wt.%, preferably from 0.05 to 1.0 wt.% and particularly preferably from 0.09 to 0.7 wt.% based on the total weight of the preparation.

11. Cleaning preparation according to one of the preceding claims, characterized in that it contains water, sodium benzoate, citric acid and / or hydrogenated castor oil.

12. Cleaning preparation according to one of the preceding claims, characterized in that glycol distearate is present in a proportion of 0.1 wt.% to 1.0 wt.%, preferably 0.3 to 0.8 wt.% and particularly preferably 0.5 to 0.7 wt.%, based on the total weight of the cleaning preparation.

13. Cleaning preparation according to one of the preceding claims, characterized in that it contains sodium benzoate, wherein it is advantageous if the proportion of sodium benzoate is 0.2 to 0.65 wt.%, preferably 0.3 to 0.55 wt.% and particularly preferably 0.4 to 0.5 wt.% based on the total weight of the preparation.

14. Cleaning preparation according to one of the preceding claims, characterized in that it contains glycerin, wherein it is advantageous if the proportion of glycerin is from 0.01 to 1.0 wt.%, preferably from 0.05 to 0.5 wt.% and particularly preferably from 0.07 to 0.1 wt.% based on the total weight of the preparation.

15. Use of a cleaning preparation according to any of the preceding claims to increase the viscosity of the cleaning preparation.

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