Emulsion containing caprylin and at least one PPG alkyl ether

Abstract

The invention discloses a skin care emulsion for beauty, which does not contain silicone, synthetic polymers, polyethylene glycol and polyethylene derivatives. Upon distribution on the skin, the emulsion produces little no foam and thus does not leave any whitening residue on the skin. The emulsion provided by the invention is fully absorbed by the skin.

Description

Technical Field

[0001] The invention belongs to the field of cosmetology and relates to a cosmetic skin care emulsion which is very suitable for cosmetic facial and body care. The emulsion is free of silicone, synthetic polymers, polyethylene glycol and polyethylene derivatives. When the emulsion is distributed on the skin, it hardly produces any foam and therefore does not leave any whitish residue on the skin. The emulsion according to the invention is well absorbed by the skin. Background Art

[0002] The skin is the largest organ of the human body and has many functions (such as sensory and thermoregulatory). However, the most important function is the barrier function, which prevents the skin and ultimately the entire organism from drying out. At the same time, the skin prevents the penetration and absorption of external substances that may be toxic or otherwise harmful.

[0003] The skin is composed of multiple layers, namely the epidermis, basement membrane, dermis, and subcutaneous tissue. The epidermis is the outermost layer consisting of the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. Keratinocytes are the main cell type of the epidermis.

[0004] The stratum corneum (stratum corneum) is essential in establishing the barrier function of the skin. The "Elias" skin model (PM Elias, Structure and Function of the Stratum Corneum Permeability Barrier, Drug Dev. Res. 13, 1988, 97-105), which is widely accepted in the field of dermatology and cosmetology, describes the stratum corneum as a two-component system similar to a brick wall (brick and mortar model). In this model, corneocytes correspond to bricks, and lipids with complex composition in the intercellular spaces correspond to mortar. This system is essentially a physical barrier for hydrophilic substances, but due to its narrow and multilayered structure, lipophilic substances can only pass through to a limited extent.

[0005] Other structures contribute to the stability and function of the stratum corneum, including the hook structures of corneocytes, corneodesmosomes, the double layer of the stratum corneum, and tight junctions.

[0006] Epidermal lipids contribute to the integrity of the stratum corneum. Epidermal lipids also affect the smoothness of the skin. Unlike lipids secreted by the sebaceous glands, which do not form a continuous film on the skin, epidermal lipids are evenly distributed throughout the stratum corneum.

[0007] The extremely complex interaction of water-binding substances with lipids in the upper layers of the skin is very important for the regulation of skin moisture. Therefore, cosmetic products often include water-binding substances in addition to a balanced mixture of lipids and water.

[0008] The aim of cosmetic skin care is primarily to support the skin's natural function as a barrier against environmental influences (e.g. dirt, chemicals, microorganisms) and the loss of endogenous substances (e.g. water, natural fats, electrolytes). Cosmetic skin care should enhance and / or help restore the skin's natural state.

[0009] If the barrier function is impaired, toxic or allergenic substances may pass through the skin, or microorganisms may penetrate the skin, leading to toxic, allergic, or inflammatory responses.

[0010] Another purpose of skin care is to replenish lipids and moisture lost through daily washing. This becomes particularly important if the skin's natural regenerative capacity is impaired. In addition, skin care products should protect against environmental influences, especially sun and wind protection, and help slow down skin aging.

[0011] Typically, skin care products are provided in the form of emulsions. An emulsion is generally understood to be a heterogeneous system of two liquids which are immiscible with each other or miscible only to a limited extent and are generally referred to as phases. One liquid is present in the form of droplets (dispersed phase or internal phase), while the other liquid forms a continuous (continuous phase or external) phase. The liquid (pure or as a solution) is present in an emulsion in a more or less fine distribution and generally has only limited stability.

[0012] If the two liquids are water and oil, and the oil droplets are finely dispersed in the water, this composition is an oil-in-water emulsion (O / W emulsion, such as milk). The basic properties of O / W emulsions are determined by the water phase, such as electrical conductivity, organoleptic properties, dyeing ability of the continuous phase.

[0013] In the case of water-in-oil emulsions (W / O emulsions, such as butter), in which droplets of water or an aqueous phase are finely dispersed in an oil phase, the essential properties are determined by the oil or oily phase.

[0014] In order to ensure the stability of the emulsion, it is usually necessary to add surface-active substances, ie emulsifiers. In addition to the necessary emulsifiers, the stability of the emulsion can also be increased by incorporating synthetic polymers, which are usually based on acrylic acid and / or its derivatives.

[0015] As consumers become more aware that the products they use should be environmentally friendly, there is a need to provide products that meet this desire. Beauty products should mainly consist of raw materials that are of natural origin or at least based on nature and are easily biodegradable.

[0016] The term biodegradability describes the process by which living organisms, especially saprophytes, break down organic compounds. Ideally, inorganic substances such as CO2, O2 and ammonia are produced, which are used by plants and microorganisms to build organic compounds again.

[0017] Readily biodegradable organic chemical compounds are classified according to OECD 301, for cosmetic compositions mostly OECD 301 B. These substances can decompose quickly and completely.

[0018] Organic chemical compounds classified according to OECD 302 are restricted but substantially biodegradable.

[0019] The term "natural" in relation to natural ingredients for cosmetic use is defined in ISO 16128; the first part of ISO 16128-1 was published on February 15, 2016, and the second part of ISO 16128-2 was published in September 2017. According to the guideline, natural cosmetic ingredients can be summarized as substances that can be obtained from plants, animals, minerals or microorganisms, including those obtained from these sources by physical processes, fermentation processes (limited to those fermentation processes that also occur in nature and produce products also obtained in nature) and other manufacturing methods without chemical modification. Microorganisms may only be those that have not been genetically modified.

[0020] In general, nature-based substances are compounds that are derived from natural starting materials or are produced starting from natural starting materials. In order to assess to what extent a substance is nature-based, the method of determining the "Biorenewable Carbon Index" (=BCI) can be used. This method is used to determine the percentage of carbon atoms from renewable plant or animal sources relative to carbon atoms from non-renewable petrochemical sources, see HAPPI July, 58-60, 2009.

[0021] The problem underlying the present invention was therefore to provide emulsions, in particular O / W emulsions, which predominantly comprise raw materials of natural origin or derived from nature.

[0022] Cosmetic compositions consisting predominantly of natural or naturally based raw materials are known and are already on the market. Such products are usually offered by companies that sell so-called natural cosmetics. Products of the company Weleda are examples of such products. By way of example, the products "Calendula Pflegemilch" (Mintel database, entry number 8405473), "Express-Feuchtigkeit Körperlotion Citrus" (Mintel database, entry number 8991140) and "Feigenkaktus 24h Feuchtigkeitscreme" (Mintel database, entry number 8060985) may be mentioned.

[0023] However, those skilled in the art who develop products consisting mainly of raw materials of natural origin or derived from nature are faced with the problem of replacing well-known, established raw materials such as silicones and / or synthetic polymers (e.g. polymers based on acrylic acid and / or its derivatives), polyethylene glycols and polyethylene derivatives. Replacing silicone oils with raw materials that provide the composition with similar sensory and care properties results in compositions that produce foams that are not absorbed by the skin in a quick and simple manner, but leave a whitish and visible film on the skin that persists for a considerable period of time.

[0024] In the cosmetics industry, raw materials are often used which contain polyethylene glycol moieties in the molecule. This is the case, for example, for emulsifiers or emulsifying substances. Polyethylene glycol is often abbreviated to PEG, and the polyethylene glycol moiety is often referred to as PEG. The polyethylene glycol moiety consists of at least two ethylene glycol molecules connected to each other, and there may also be hundreds of ethylene glycol molecules, for example 200 ethylene glycol molecules. Ingredients containing these polyethylene glycol moieties are becoming less and less popular with consumers. Therefore, it is also a task of the present invention not to incorporate ingredients containing polyethylene glycol moieties into the emulsions of the present invention.

[0025] The emulsion of the present invention does not contain any silicone or silicone-containing compound, which means that no silicone and / or silicone-containing compound, nor raw materials containing silicone or silicone-containing compounds, even in trace amounts, are added to the emulsion of the present invention. Silicone-containing compounds are characterized by the presence of silicon and oxygen atoms, which are linked to each other and can form a large number of different compounds.

[0026] A polymer is a high molecular weight chemical compound (macromolecule) composed of repeating units (monomers) that can be identical or different. Polymers can have a linear, branched or cross-linked structure. If polymers are formed through synthetic reactions, they can be classified as synthetic polymers. Commonly used monomers are acrylic acid or its derivatives. Synthetic polymers have no counterparts in nature and are not biodegradable within the usual time intervals. As a result, these polymers persist for a long time in nature, leading to the pollution of landscapes and water bodies. Summary of the invention

[0027] The problem underlying the present invention is therefore to provide an emulsion, in particular an O / W emulsion, which contains predominantly raw materials of natural origin or natural derivation, which is absorbed well and easily by the skin without producing foam which might become a visible whitish film on the skin.

[0028] Surprisingly, the problem is solved by a cosmetic emulsion, preferably an O / W emulsion, comprising

[0029] - Glyceryl Caprylate, and

[0030] - At least one PPG alkyl ether.

[0031] Glyceryl caprylate is a monoester of glycerol and caprylic acid. Glyceryl caprylate is a beneficial ingredient for cosmetic compositions because it has multiple functions. Due to its chemical properties, glyceryl caprylate has emulsifying properties. It also regulates moisture and moisturizes the skin. In addition, it is exceptionally compatible with the skin. Since glyceryl caprylate has activity against bacteria and yeasts, it stabilizes the cosmetic composition.

[0032] Glyceryl caprylate is commercially available from Evonik Operations GmbH under the trade name Dermosoft GMCYMB.

[0033] In the emulsion of the present invention, caprylic acid glyceryl is contained in an amount of 0.05 to 3.0% by weight, preferably 0.1 to 0.5% by weight, relative to the total weight of the emulsion. The percentage values ​​are related to the active substance content values.

[0034] In addition to caprylic acid glyceryl, one or more additional emulsifiers or components having emulsifying properties may be contained, which may preferably be selected from glyceryl stearate, polyglyceryl-3 methylglucose distearate, glyceryl stearate SE, sodium cetearyl sulfate and / or glyceryl stearate citrate.

[0035] If the at least one additional emulsifier or component having emulsifying properties is contained in the emulsion according to the invention, the emulsifier is contained in an amount of 0.01 to 5.0 wt. %, preferably 0.05 to 4.5 wt. %, relative to the total weight of the emulsion. The percentage values ​​are related to the active substance content values.

[0036] Due to the chemical nature of the above-mentioned emulsifiers containing at least one fatty acid residue, which has a hydrophobic nature, the emulsifiers may also be effective, at least to some extent, as emollients.

[0037] According to the present invention, at least one PPG alkyl ether is contained. The PPG alkyl ether can be defined by formula (I):

[0038]

[0039] wherein i is an integer in the range of 1 to 12, and j is an integer in the range of 2 to 40. The term "PPG" stands for polypropylene. Preferred PPG alkyl ethers are defined by i being an integer in the range of 4 to 10 and j being an integer in the range of 2 to 10. More preferred is PPG-3 octyl ether.

[0040] PPG-3 octyl ether is commercially available from Kao Chemicals under the trade name Sofcare GP-1.

[0041] In the emulsion of the invention, the at least one PPG alkyl ether is contained in a total amount ranging from 0.2 to 5.0 wt. %, preferably from 0.5 to 3.0 wt. %, relative to the total weight of the emulsion.

[0042] The combination of at least one PPG alkyl ether and caprylic glyceryl incorporated in the emulsion of the present invention contributes to an emulsion that produces hardly any foam. Thus, the emulsion is absorbed into the skin with hardly any whitish residue. If foam is produced, it is only in a very small amount. The foam is fully absorbed and hardly any whitish residue is detected.

[0043] In addition to the at least one PPG alkyl ether, the solutions of the present invention may contain at least one emollient.

[0044] The emollients may take the form of at least naturally derived esters, since both the alcohol and the fatty acid / carboxylic acid are obtained from natural sources.

[0045] The at least one emollient can be selected from triglycerides. The fatty acid of the triglycerides can be selected from the mixture of fatty acids, because they are derived from natural sources. Glycerol and the ester of the fatty acid obtained from natural oils such as coconut oil, palm oil, soybean oil etc. are advantageous. Such fatty acids are mixtures reflecting the composition of the corresponding natural oils in each case. Coconut oil glyceride is a favorable example. Coconut oil glyceride can be purchased from BASF company, and trade name is Myritol331.

[0046] The fatty acid of the triglyceride can also be selected from a single fatty acid or different types of fatty acids. In order to finally obtain the triglyceride, glycerol is esterified with the single fatty acid or the desired type of fatty acid. If the fatty acid is a medium chain fatty acid such as caproic acid, caprylic acid, capric acid or lauric acid, medium chain triglycerides are formed. Caprylic / capric triglycerides may be preferred.

[0047] The at least one emollient may also be shea butter. Shea butter is a natural fat component obtained from the nuts of the African shea tree. The fatty acids oleic acid (40-55%), stearic acid (35-45%), linolenic acid (3-8%) and palmitic acid (3-7%) are the main fatty acids in shea butter.

[0048] The at least one emollient may also be at least one ester of isopropyl alcohol and a fatty acid having 6 to 22 carbon atoms, preferably 8 to 20 carbon atoms. Isopropyl myristate, isopropyl palmitate and isopropyl stearate are advantageous examples, isopropyl palmitate being particularly advantageous.

[0049] If the at least one emollient is contained in the emulsion of the invention, the total amount of the at least one emollient is in the range of 0.1 to 10 wt. %, preferably 0.5 to 8.0 wt. %, relative to the total weight of the emulsion.

[0050] In the emulsions of the present invention, at least one thickener may be included which is of natural origin or naturally derived.

[0051] In general, thickeners are macromolecules with a predominantly linear configuration and varying degrees of intermolecular interactions that allow the formation of secondary and primary bonds between the individual residues of the molecule, thus forming a network structure. Thickeners can be water-soluble or water-swellable, natural or synthetic polymers that form gels or viscous solutions in aqueous systems. They increase the viscosity of water by binding water molecules (hydration) or by absorbing and encapsulating water in their possibly intertwined macromolecules; both effects lead to a restriction of the mobility of water. Such water-soluble or water-swellable polymers represent a large class of natural and synthetic polymers of very different chemical properties, whose common feature is their solubility or swelling in water or aqueous media. A prerequisite for dissolution or swelling in water is a sufficiently large number of hydrophilic groups to ensure solubility in water and limited crosslinking. The hydrophilic groups can be nonionic, anionic or cationic groups.

[0052] According to the present invention, the thickener is selected from:

[0053] - organic natural compounds such as agar, carrageenan, tragacanth, gum arabic, alginates, pectins, polysaccharides, guar flour, carob flour, starch, dextrin, gelatin, casein,

[0054] - Organically modified natural substances, such as carboxymethyl cellulose and other cellulose ethers, hydroxyethyl cellulose and hydroxypropyl cellulose.

[0055] Advantageously, the thickener is a biopolymer from various sources, more advantageously, the at least one thickener is selected from xanthan gum, gellan gum, succinoglucan gum, scleroglucan, cellulose and / or derivatized cellulose; most advantageously, the at least one thickener is selected from xanthan gum, gellan gum and / or hydroxypropyl starch phosphate.

[0056] For example, xanthan gum is an exopolysaccharide obtained from the bacterium Xanthomonas campestris. Xanthan gum is a polymer composed of a backbone of glucose molecules linked by β-1,4 glycosidic bonds. Every other glucose residue has a side chain consisting of two mannose residues, a glucuronic acid residue, and pyruvic acid.

[0057] Xanthan gum dissolves well in hot and cold water and forms single and double helices, creating a three-dimensional network.

[0058] Xanthan gum is available, for example, from CP Kelco under the trade name Keltrol CG-RD.

[0059] Gellan gum is an unbranched anionic polymer; the basic unit of this polymer is a tetrasaccharide of two glucose residues, namely glucuronic acid and rhamnose. Almost every tetrasaccharide is esterified with glycerol and almost every other basic unit is esterified with acetic acid. Both substituents are attached to the same glucose residue. Natural gellan gum is highly acetylated. It forms a soft, elastic and non-brittle gel. Gellan gum gels with a lower degree of acetylation are hard, inelastic and brittle.

[0060] An advantageous gellan gum according to the invention can be purchased, for example, from the company CP Kelco under the trade name Kelcogel CG-LH.

[0061] Hydroxypropyl starch phosphate is a naturally derived starch that can be obtained by esterifying food starch with sodium trimetaphosphate or phosphorus oxychloride and etherifying with propylene oxide. Hydroxypropylation results in the replacement of the hydroxyl groups with 2-hydroxypropyl ethers.

[0062] Hydroxypropyl starch phosphate can be cold processed, which is a great advantage.

[0063] Hydroxypropyl starch phosphate is commercially available from Cargill Corporation under the trade name Stardesign Care.

[0064] If at least one thickener is present in the emulsion according to the invention, it is preferably contained in a total amount of 0.02 to 5.0 wt. %, more preferably 0.05 to 2.0 wt. %, relative to the total weight of the emulsion. The values ​​refer to the active substance content of the thickener.

[0065] Furthermore, at least one UV filter may be present in the emulsion according to the invention. The UV filter may be selected from titanium dioxide and / or zinc oxide (both of which may be coated), octocrylene, triacine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate and / or bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0066] If at least one further UV filter is present in the emulsion according to the invention, it is contained in a total amount of 1.0 to 10% by weight, preferably 1.0 to 5.0% by weight, relative to the total weight of the emulsion.

[0067] The emulsion of the present invention is an aqueous composition. Preferably, water is contained in an amount of 60 to 90 wt%, more preferably 65 to 80 wt%, relative to the total weight of the emulsion.

[0068] Advantageously, according to the invention, at least one humectant is also present in the emulsion according to the invention. Humectants are hygroscopic substances which bind water and thus provide moisture. The hygroscopicity is due to the hydrophilic substituents of the molecule, in many cases hydroxyl groups, but other functional groups such as amine or carboxyl groups also have the same effect. Examples of humectants are propylene glycol, butylene glycol, caprylyl glycol, glycerol, sorbitol, xylitol, maltitol, polydextrose, hydrogenated starch hydrolysates, urea, aloe vera gel, alpha-hydroxy acids such as lactic acid, honey. Preferred humectants are glycerol and / or caprylyl glycol, which are obtained from natural processes.

[0069] If at least one moisturizer is present in the emulsion according to the invention, it is contained in a total amount of 1.0 to 10.0% by weight, preferably 2.0 to 8.0% by weight, relative to the total weight of the emulsion.

[0070] Advantageously, according to the invention, the emulsion should be stable with respect to microbial contamination. Generally, preservatives are added to cosmetic compositions in order to reduce the number of microorganisms and prevent their growth. However, many known preservatives are of synthetic origin and are therefore not natural.

[0071] In one embodiment, an emulsion is provided which does not contain any preservatives of synthetic origin. In this case, the emulsion may be preserved by adding short chain alcohols preferably selected from ethanol and / or isopropanol, which are obtained from natural processes such as fermentation.

[0072] In another embodiment, an emulsion is provided, comprising at least one preservative, the preservative being in accordance with the list of preservatives approved by the European Union (EC Regulation 1223 / 2009; Annex V). Preferably, the preservative is phenoxyethanol.

[0073] If phenoxyethanol is contained in the emulsion of the present invention, it is contained in an amount of 0.1 to 0.9 wt %, preferably 0.4 to 0.8 wt %, relative to the total weight of the emulsion.

[0074] In addition to the above preservatives, one or more substances that support the effect of the preservatives may be present. These substances are not included in the list of approved preservatives (Annex 6 to the Cosmetic Regulation; Regulation (EC) No 1223 / 2009, Annex V), but still have a stabilizing effect and / or promote the stability of the formulation when used together with the preservatives. For the purposes of this invention, these substances are referred to as stabilizers.

[0075] The following compounds are suitable as stabilizers: ethylhexylglycerol, 1,2-hexanediol, methylpropanediol and / or pentylene glycol.

[0076] If at least one stabilizer is contained in the emulsion according to the invention, it is contained in a total amount of 0.1 to 5.0% by weight, preferably 1.0 to 3.0% by weight, relative to the total weight of the emulsion.

[0077] The emulsion of the present invention is preferably an O / W emulsion. Preferably, the oil phase is contained in an amount of 10 to 30% by weight, preferably in an amount of 15 to 27% by weight. The amount in % by weight is relative to the total weight of the emulsion.

[0078] The compositions of the present invention may be prepared by any known or effective technique for preparing O / W emulsions or W / O emulsions. Methods for preparing the compositions of the present invention include conventional formulation and mixing techniques.

[0079] In order to evaluate the performance of the emulsions of the present invention in terms of foam generation and leaving a whitish residue on the skin, a method for analyzing the whitish residue on the skin using an image analyzer and image analysis software (ImageJ) was developed.

[0080] The following steps were taken:

[0081] Set up the instrument:

[0082] 1. Prepare the sample and load it into the pipette.

[0083] 2. Set the metronome (96 beeps per minute).

[0084] 3. Prepare a stopwatch.

[0085] 4. Turn on the light box and adjust it to white light.

[0086] 5. Prepare artificial skin made of synthetic leather and reference cards.

[0087] 6. Open the camera and set up the camera.

[0088] Apply the sample to artificial skin and take a picture:

[0089] 1. Apply 200µL of lotion to the left third of the artificial skin.

[0090] 2. Start the metronome.

[0091] 3. Start the stopwatch, move 3 fingers left and right to the beat of the metronome, and spread the product on the artificial skin for 30 seconds.

[0092] 4. Take a photo immediately after application is complete.

[0093] The images were analyzed using ImageJ (software):

[0094] Calculation results:

[0095] Set the relative anti-blushing value of the standard white area (2*10cm) to 0%;

[0096] Set the relative anti-blushing value of full black (L value <50, average gray value = 255) to 100%.

[0097]

[0098] M 样品 : The average gray value of the test sample.

[0099] M 20 : Average gray value of 2x10cm standard white area.

[0100] A value of 100% means that there is no whitish residue at all, whereas a value of 0% means that a noticeable whitish residue is visible.

[0101] Technical Effects

[0102] It is evident that the composition according to Comparative Example A containing cyclomethicone as emollient and carbomer as thickener produces only very little foam. In general, the foam has a whitish appearance and is not absorbed quickly by the skin. Therefore, the object of the present invention is to obtain an emulsion which does not contain an acrylic thickener and any silicone compound, but produces only little foam and thus leaves almost no whitish residue on the skin.

[0103] The results obtained from the above analysis show that replacing the thickener carbomer with the thickeners xanthan gum and hydroxypropyl starch phosphate, and replacing silicone with glyceryl cocoate and isopropyl palmitate, results in the production of relatively clear foam, leaving a whitish residue on the skin (Table 1; Comparative Example B).

[0104] Starting from these data, several combinations of emulsifiers were tested. Improved results were obtained by using a combination of emulsifiers from groups A and B, in particular polyglyceryl-3 methylglucose distearate, glyceryl stearate and glyceryl caprylate (Table 1; Inventive Example 1).

[0105] Furthermore, different combinations of emollients were analyzed, but in each case comprising triglycerides (especially cocoglyceryl) and esters of isopropyl alcohol and fatty acids (especially isopropyl palmitate). It is clear that the further addition of at least one PPG alkyl ether (especially PPG-3 caprylyl ether) leads to a further reduction in the white residue (Table 1; Inventive Examples 2 to 6). The white residue is reduced, reaching values ​​of at least 75%, while the value for the comparative composition containing silicone oil and carbomer (Table 1; Comparative Composition A) is 98.94%.

[0106] In addition, different emulsifiers were evaluated (as shown in Table 2). The combination of the emulsifiers sodium cetearyl sulfate and glyceryl stearate SE produced unfavorable results, as shown by the value of -27.74% (Table 2; Comparative Example C). The addition of at least one PPG alkyl ether, in particular PPG-3 caprylyl ether, resulted in improved results, but some foaming and therefore visible whitish residues (Table 2; Inventive Example 7). Further improvements could be achieved by adding the emulsifier glyceryl caprylate (Table 2; Inventive Example 8).

[0107] In summary, it can be demonstrated that the emulsions according to the invention make it possible to solve the problem according to the invention, namely to provide emulsions which produce only little or hardly any foam and thus only little or almost no whitish residue. DETAILED DESCRIPTION

[0108] The following examples are intended to illustrate the present invention rather than to limit the present invention. The values ​​in the examples are weight percentages based on the total weight of the specific composition. If not otherwise specified, these values ​​refer to the active substance content.

[0109] Table 1:

[0110]

[0111] Table 2:

[0112]

[0113] *The stated values ​​refer to raw material content.

Claims

1. A cosmetic emulsion, preferably an O / W emulsion, comprising - Glyceryl Caprylate, and - At least one PPG alkyl ether.

2. The emulsion according to claim 1, characterized in that Glyceryl caprylate is contained in an amount ranging from 0.05% to 3.0% by weight, preferably from 0.1% to 0.5% by weight, relative to the total weight of the emulsion and relative to the active substance content.

3. The emulsion according to claim 1 or 2, characterized in that Containing at least one PPG alkyl ether defined by formula (I): wherein i is an integer in the range of 1 to 12, preferably 4 to 10, and j is an integer in the range of 2 to 40, preferably 2 to 10.

4. An emulsion according to any one of the preceding claims, characterized in that The PPG alkyl ether is PPG-3 octyl ether.

5. An emulsion according to any one of the preceding claims, characterized in that The at least one PPG alkyl ether is contained in a total amount of 0.2% to 5.0% by weight, preferably 0.5% to 3.0% by weight, relative to the total weight of the emulsion.

6. An emulsion according to any one of the preceding claims, characterized in that Contains at least one other emulsifier selected from glyceryl stearate, polyglyceryl-3 methylglucose distearate, glyceryl stearate SE, sodium cetearyl sulfate and / or glyceryl stearate citrate, and the total amount of the at least one other emulsifier is preferably 0.01 wt % to 5.0 wt %, more preferably 0.05 wt % to 4.5 wt %, relative to the total weight of the emulsion.

7. An emulsion according to any one of the preceding claims, characterized in that Contains at least one emollient, preferably selected from triglycerides, shea butter and / or esters of isopropyl alcohol and fatty acids having 6 to 22 carbon atoms.

8. An emulsion according to any one of the preceding claims, characterized in that At least one emollient is contained, and the total amount of the at least one emollient is in the range of 0.1 wt % to 10 wt %, preferably 0.5 wt % to 8.0 wt %, relative to the total weight of the emulsion.

9. An emulsion according to any one of the preceding claims, characterized in that Contains at least one thickener, which is preferably selected from xanthan gum, gellan gum, succinoglycan gum, scleroglucan, cellulose and / or derivatized cellulose, more preferably selected from xanthan gum, gellan gum and / or hydroxypropyl starch phosphate.

10. The emulsion according to claim 9, characterized in that The at least one thickener is contained in a total amount ranging from 0.02% to 5.0% by weight, preferably from 0.05% to 2.0% by weight, relative to the total weight of the emulsion.

11. An emulsion according to any one of the preceding claims, characterized in that Water is contained in an amount of 60 to 90 wt %, preferably 65 to 80 wt %, relative to the total weight of the emulsion.

12. An emulsion according to any one of the preceding claims, characterized in that The emulsion is an O / W emulsion, and the oil phase is preferably contained in an amount of 10 to 30 wt %, more preferably 15 to 27 wt %, relative to the total weight of the emulsion.

13. Use of glyceryl caprylate and at least one PPG alkyl ether in an emulsion according to any one of the preceding claims for reducing the generation of foam and / or reducing whitish residue when the emulsion is distributed on the skin.

Images