DE102021002698A1 - Compositions containing membrane-forming substances for producing a pump foam - Google Patents

Abstract

The present invention relates to cosmetic and dermatological foam formulations, based on emulsions, in particular of the oil-in-water type, the oil phase comprising at least one membrane-forming substance which forms a lamellar membrane in the formulation, the formulation for foaming with a propellant-free, mechanical pump foam head.

Description

The present invention relates to cosmetic and dermatological foam formulations, based on emulsions, in particular of the oil-in-water type, the oil phase comprising at least one membrane-forming substance which forms a lamellar membrane in the formulation, the formulation for foaming with a propellant-free, mechanical pump foam head.

Background of the Invention

Out of EP 2020221 B1 formulations are known which can be foamed and used for cosmetic and/or dermatological applications. The formulations mentioned there contain membrane-forming substances which also form a lamellar membrane in a foam formulation. The formulations described there can be used as carriers for active ingredients, as skin care products or skin cleansing products. The formulations described can also be foamed using propellant gases.

However, it has been found that foaming is difficult without the use of propellant gases. When using commercially available mechanical pump heads, such as those in EP 1496852 B1 are described, a very coarse-pored foam is formed at best, which flows away immediately after it is removed from the dispenser. As a rule, the foam pump only conveys the emulsion, without air bubbles being dispersed into the emulsion.

There is therefore a need for formulations which are suitable for foaming by means of a mechanical pump head without having to use propellants and without impairing the excellent properties of the known foam creams.

It has surprisingly been found that compositions according to claim 1 of the present patent application are outstandingly suitable for fulfilling the above-mentioned objects.

In particular, it has been found that oil-in-water emulsions, formed by an oil phase and a water phase, the oil phase comprising at least one membrane-forming substance which forms a lamellar membrane in the foam formulation, characterized by a proportion of 0.5-5 wt .% of one or more special foam surfactants, selected from the alkyl polyglucosides and/or alkylamidobetaines, in particular decyl glucoside and/or cocoamidopropyl betaine, are excellently suited for foaming without propellant using a mechanical foam pump head.

The formulations according to the invention also optionally contain 0.25-2.5% by weight of xanthan gum and/or acacia gum. You can also optionally contain 0.25-1.5% by weight of Phospholipon 80H and/or Phospholipon 90H.

All percentages in this document are percentages by weight (wt%) unless otherwise noted.

It goes without saying that not using propellants makes a contribution to environmental protection.

It has been found that the use of 0.5-5% by weight of one or more specific foam surfactants, namely alkyl amido betaines or alkyl polyglucosides, is crucial for foam stability when using a mechanical pump foam head. C ₈ to C ₁₂ alkyl glucosides in particular, such as decyl glucoside and cocoamidopropyl betaine, are outstanding examples which provide the necessary foam formation and stability when using a mechanical pump foam head.

Without the use of alkyl polyglucosides or alkyl amido betaines, no stable foam could be produced with such a pump foam head.

Particularly suitable foams have been obtained by further using 0.25-2.5% by weight of xanthan gum and/or acacia gum. Formulations that contain both decyl glucoside and/or cocoamidopropyl betaine and xanthan gum are therefore particularly preferred embodiments of the invention.

Optionally, formulations according to the invention for foam stabilization can also contain hydrogenated phospholipids, in particular Phospholipon 80H and/or Phospholipon 90H. The ratio of foaming surfactant to hydrogenated phospholipid is preferably between 1:0.5 and 1:5.

The formulations according to the invention have the particular advantage of not requiring any PEG derivatives and any sulfates or sulfonates. Furthermore, the formulation does not require any liquid plastics, such as e.g. B. polyacrylic acid and its derivatives.

The formulations according to the invention are preferably provided in propellant-free containers and removed by means of a mechanical pump head, the pump head being set up to foam the formulation. Such pump heads are known from the prior art and are commercially available (e.g. Frapak foam pump type M3, Frapak foam pump type F2, pack tech PTY-FOAM-FLEUR, pack tech PTY-FOAM-OLAYA, Quadpack 3 mesh Foamer).

The formulations according to the invention are suitable in the same way when using electrically driven, mechanical foam pumps that work without propellants. Such pumps (e.g. touch-free foam dispensers from the companies VEEAPE or Farsaw) are often found in hotels and public toilets and deliver foam after sensor-based proximity detection without having to be touched. With these foam dispensers, too, there was the difficulty of producing a foamable preparation according to the invention with membrane-forming substances that can produce a foam without using a blowing agent.

According to the present invention, a membrane-forming substance that forms a lamellar membrane is a substance that has both a hydrophilic and a hydrophobic moiety at the same time. Substances such as (mono-, di-, tri-)glycerides, lecithins, sphingolipids, phospholipids, ceramides, cholesterol, squalene, squalane, fatty alcohols, fatty acids and their mono- and/or diesters, sterols, etc. are preferred.

According to the present invention, a lamellar membrane is arranged such that it has a layered structure such that the respective upper layer of the substance is aligned with a lower layer of the substance. The individual substance layers are aligned with one another, independently of the solvent used, in such a way that, for example, the hydrophilic residues of the substance point outwards and the hydrophobic residues face inwards, or vice versa.

If two layers of the substance are oriented in the manner described above, this is referred to as a single membrane, while if two further layers are arranged one on top of the other, this lamellar structure is referred to as a double membrane. According to the present principle, further layers can be associated to the already existing (double) membrane, which leads to a multiple membrane structure. According to the present invention, the membrane can be in the form of a single membrane, a double membrane or a multiple membrane.

The “wash out” effect is understood to mean a reduction in skin moisture below the initial value after the application of the care composition has ended.

According to the present invention, body-identical fats are fats found in the body of plant origin.

oil phase:

Suitable components which can form the oil phase can be chosen from polar and non-polar oils or mixtures thereof.

The oil phase of the formulations according to the invention is advantageously chosen from the group of lecithins, (mono-, di-, tri-)glycerides (such as fatty acid triglycerides), sphingolipids, phospholipids, from the group of propylene glycols or butylene glycols, fatty acid esters, from the group natural waxes of animal and vegetable origin, from the group of ester oils, from the group of dialkyl ethers and dialkyl carbonates, from the group of branched and unbranched hydrocarbons and waxes, and from the group of cyclic and linear silicone oils.

Due to the lamellar membrane structure and the resulting structural similarity to the structure of the intercellular layer structure of the skin, in particular the stratum corneum, the foam formulations according to the present invention enable an improved care effect of the formulation. Due to the analog structure of the lamellar structure of the skin, an easier integration of the membrane into the skin is achieved. The integration also leads to an improvement, in particular the stabilization and restoration, of the skin barrier. An intact skin barrier protects the skin from excessive moisture loss. An improvement in the skin barrier can also bring about improved smoothing of the skin and reduce the “wash-out” effect, which advantageously results in a better long-term effect compared to conventional foam formulations.

Preferred foam formulations of the present invention utilize "skin-like" ingredients to create the resemblance of the lamellar membrane present in the foam formulation to skin.

Particularly preferred embodiments replace e.g. the natural glycerides present in the horny layer (the skin mainly contains a mixture of di- and triglycerides) with e.g. (vegetable) triglycerides, squalene with e.g. the less oxidation-sensitive squalane, ceramides with ceramide 3 (from yeast) , cholesterol replaced by (plant) phytosterols and phospholipids by (plant) phospholipids.

In a preferred foam formulation of the invention, the membrane-forming substance comprises a lipid, more preferably a triglyceride and/or lecithin. In a particularly preferred foam formulation of the invention, the triglyceride is caprylic/capric acid triglyceride and/or the lecithin is hydrogenated lecithin.

In another preferred foam formulation of the present invention, the formulation may further comprise lecithin, preferably hydrogenated lecithin.

The preferred foam formulations according to the invention can also contain other components such as stabilizers such as alcohols or glycols. Glycols are preferred, in particular pentylene glycol, hexylene glycol and caprylyl glycol or mixtures thereof.

In preferred foam formulations of the invention, further ingredients such as Butyrospermum Parkii (shea butter), squalane, glycerides, ceramides, preferably ceramide 3 or mixtures of the aforementioned may comprise.

Base creams that make use of the "skin-like" ingredients described above are also known in the art as DMS ^® or SLM ^® or SLM ^® base creams.

The DMS ^® or SLM ^® base compositions may have the following ingredients: caprylic acid/capric acid triglyceride, shea butter, squalane, ceramide 3, hydrogenated lecithin, palm glyceride, Persea gratissima, palm oil (Elaesis Guineensis).

Alcohols or glycols such as pentylene glycol, hexylene glycol, octylene glycol, caprylyl glycol or mixtures thereof can be used as stabilizers in the DMS® or SLM® compositions.

A commercially available DMS® or SLM® base includes caprylic acid/capric acid triglyceride, shea butter, squalane, ceramide 3, hydrogenated lecithin and pentylene glycol.

Another commercially available DMS® or SLM® base includes caprylic acid/capric acid triglyceride, shea butter, squalane, ceramide 3, hydrogenated lecithin and alcohol.

Another commercially available DMS® or SLM® base includes caprylic acid/capric acid triglyceride, shea butter, squalane, ceramide 3, hydrogenated lecithin, Persea gratissima and caprylyl glycol.

Another commercially available DMS® or SLM® base includes caprylic acid/capric acid triglyceride, shea butter, squalane, ceramide 3, hydrogenated lecithin, palm glycerides, elaesis guineensis and pentylene glycol.

A preferred DMS® or SLM® base includes caprylic acid/capric acid triglyceride, butyrospermum parkii, squalane, ceramide 3, hydrogenated lecithin and pentylene glycol.

A particularly preferred triglyceride of caprylic acid/capric acid is available under the name Miglyol 812 from Sasol and its mixture with other oil and wax components.

Also particularly preferred are the caprylic acid/capric acid triglyceride available under the name Miglyol 812 from Sasol/Myritol 312 from BASF/Tegosoft CT from Evonik.

The emulsions according to the invention preferably contain from 5 to 50% by weight of oil phase, more preferably 10 to 35% by weight and most preferably 15 to 35% by weight of oil phase. The data are in each case based on the total weight of the emulsion.

These cream compositions are used in particular for irritated, dry to very dry, sensitive to very sensitive, allergic and eczemic skin.

In addition, the oil phase can preferably contain other components such as fatty acids, in particular stearic acid, or oils such as Cetiol V.

In the case of the SLM and DMS concentrates and the formulations according to the invention, preference is given to avoiding other (non-body-identical) customary auxiliaries such as fragrances, dyes, comedogenic lipids (e.g. mineral oils) and physiological emulsifiers, since these are potentially sensitizing and lead to skin irritation be able.

water phase:

The water phase can contain cosmetic auxiliaries, e.g. lower alcohols (e.g. ethanol, isopropanol), lower diols or polyols and their ethers (e.g. propylene glycol, glycerine, butylene glycol, hexylene glycol and ethylene glycol), foam stabilizers and thickeners.

Suitable thickeners are polymeric thickeners that are partially water soluble or at least water dispersible and form gels or viscous solutions in aqueous systems. They increase the viscosity of the water either by binding water molecules (hydration) or by absorbing and enveloping the water in their intertwined macromolecules, thereby restricting the mobility of the water.

• - Abgewandelte Naturstoffe, wie Celluloseether (z.B. Hydroxypropylcelluloseether, Hydroxyethlylcellulose und Hydroxypropylmethylcelluloseether);
• - Natürliche Verbindungen, wie z.B. Agar-Agar, Carrageen, Polyosen, Stärke, Dextrine, Gelatine, Casein;
• - Synthetische Verbindungen wie z.B. Vinylpolymere, Polyether, Polyimine, Polyamide und Derivate der Polyacrylsäure; und
• - Anorganische Verbindungen wie z.B. Polykieselsäure und Tonmineralien.

Examples of polymers suitable as thickeners are:

• - Modified natural substances such as cellulose ethers (eg hydroxypropyl cellulose ether, hydroxyethyl cellulose and hydroxypropylmethyl cellulose ether);
• - Natural compounds such as agar-agar, carrageenan, polyoses, starch, dextrins, gelatin, casein;
• - Synthetic compounds such as vinyl polymers, polyethers, polyimines, polyamides and derivatives of polyacrylic acid; and
• - Inorganic compounds such as polysilicic acid and clay minerals.

Preferably a cellulose ether is included as a thickening agent in the formulation of the invention. Hydroxypropylmethylcellulose is particularly preferred. A preferred hydroxypropylmethylcellulose according to the invention is Metolose 90SH100.

Another preferred thickening agent is xanthan gum, e.g. B. Keltrol® CG or Rheocare XGN. Acacia gum or microcrystalline cellulose, e.g. Sensocel stab 026 N, can also be used as an alternative or in addition to xanthan gum.

The hydroxypropylmethyl cellulose, xanthan gum and microcrystalline cellulose can also be used side by side in the formulation according to the invention.

The emulsions according to the invention preferably contain from 0.2 to 3.0% by weight of thickener (based on the dry weight of the thickener and the total weight of the emulsion without propellant gas). 0.5 to 2.5% by weight of thickener is particularly preferred.

Active ingredients:

The active substance contained can be selected from all active substances that can be applied to the surface of the skin and mixtures of these. The active ingredient can act cosmetically or pharmaceutically. Correspondingly, one obtains cosmetic or dermatological foam formulations (to be used as a medical product or pharmaceutical product). Furthermore, the formulation can serve to protect the skin from environmental influences. The active ingredient can be purely herbal or synthetic. The group of active ingredients can also overlap with the other groups of ingredients, such as the oil component, the thickeners or the solid emulsifiers. For example, some oil components can also serve as active ingredients, such as oils with polyunsaturated fatty acids, or solid emulsifiers, such as particulate titanium dioxide can serve as a UV filter. Depending on the property profile, the substances can be assigned to several groups.

Active ingredients of the formulations according to the invention are advantageously selected from the group of substances with moisturizing and barrier-enhancing properties, such as. B. Hydroviton, a replica of the NMF, pyrrolidone carboxylic acid and its salts, lactic acid and its salts, glycerol, sorbitol, propylene glycol and urea, substances from the group of proteins and protein hydrolyzates such. As collagen, elastin and silk protein, substances from the group of glucosaminoglucans, such as. B. hyaluronic acid from the group of carbohydrates such. B. Pentavitin, which corresponds in its composition to the carbohydrate mixture of the human horny layer, and the group of lipids and lipid precursors such as ceramides. According to the present invention, further advantageous active ingredients can also be selected from the group of vitamins, such as e.g. B. panthenol, niacin, α-tocopherol and its esters, vitamin A and vitamin C. In addition, the active ingredients selected from the group of antioxidants z. As galates and polyphenols can be used. Urea, hyaluronic acid and pentavitin are preferred substances.

It is also preferred that substances with skin-soothing and regenerating effects are used as active ingredients, such as e.g. B. panthenol, bisabolol and phytosterols.

Advantageous active ingredients for the purposes of the present invention are also plants and plant extracts. These include, for example, algae, aloe, arnica, beard lichen, comfrey, birch, nettle, calendula, oak, ivy, witch hazel, henna, hops, chamomile, butcher's broom, peppermint, marigold, rosemary, sage, green tea, tea tree, horsetail, and thyme Walnut and extracts thereof.

The preparations according to the invention can also contain antimycotics and antiseptics/disinfectants of synthetic or natural origin as active ingredients.

• Die Formulierungen können außerdem optional Farbstoffe, Perlglanzpigmente, Duftstoffe/Parfum, Lichtschutzfiltersubstanzen, Konservierungsmittel, Komplexbildner, Antioxidantien und Repellentien sowie pH-Wert Regulatoren enthalten. Die erfindungsgemäßen Schaumformulierungen können neben den bereits oben genannten Bestandteilen weitere natürliche Fette, wie z. B. Sheabutter, Neutralöle, Olivenöl, Squalan, Ceramide und Feuchthaltesubstanzen enthalten, wie sie in der Technik üblich sind.

Other active ingredients are glucocorticoids, antibiotics, analgesics, antiphlogistics, antirheumatics, antiallergics, antiparasitics, antipruritic drugs, antipsoriatics, retinoids, local anesthetics, vein therapeutics, keratolytics, hyperemic substances, coronary therapeutics (nitrates/nitro compounds), antivirals, cytostatics, hormones, active ingredients that promote wound healing, eg growth factors, enzyme preparations and insecticides. Other components of the emulsion:

• The formulations can also optionally contain dyes, pearlescent pigments, fragrances/perfume, light protection filter substances, preservatives, complexing agents, antioxidants and repellents, and also pH regulators. In addition to the components already mentioned above, the foam formulations according to the invention can also contain other natural fats, such as e.g. B. shea butter, neutral oils, olive oil, squalane, ceramides and humectants, as they are common in the art.

The above enumeration of the individual components of the emulsion should be understood in such a way that individual exemplary components can also be assigned to several groups on the basis of their different properties.

Production method:

The foam formulations of the present invention are provided by providing an emulsion, preferably of the oil-in-water type, and filling the emulsion into a suitable container such as a standard plastic, aluminum, glass or tin container.

In particular, the emulsions according to the invention are prepared by a process which comprises the following steps: (1) providing an oil phase, optionally comprising at least one membrane-forming substance which forms a lamellar membrane in the formulation, (2) providing a water phase, (3) combining and Homogenizing the two phases, (4) Optionally adding at least one or at least one further membrane-forming substance, (5) Optionally homogenizing to obtain an emulsion, wherein at least one of steps (1) or (4) contains at least one membrane-forming substance , which forms a lamellar membrane in the formulation.

The oil phase and the water phase are preferably each mixed and homogenized at a temperature in the range from about 40 to about 90°C, a temperature range from about 60 to about 80°C being particularly preferred, more preferably a temperature of about 70°C.

Any means or method known in the art can be used for the homogenization. The phases are preferably homogenized using a high-speed stirrer, a rotor-stator homogenizer or a high-pressure homogenizer.

In a preferred manufacturing process, the oil phase is stirred into the water phase and homogenized. If necessary, the emulsion is cooled to room temperature while stirring. In a particularly preferred method, a suitable amount of a DMS® or SLM® concentrate is added to this mixture and the concentrate is incorporated into the present emulsion.

The DMS® or SLM® concentrate can be added to the oil phase before homogenizing with the water phase or added to the mixture after the oil and water phases have been homogenized. It is preferred that the DMS® or SLM® concentrate is added to the mixture after the first homogenisation step and the mixture is homogenised.

If the emulsion comprises a thickener, the method advantageously comprises the following further steps: (6) providing an aqueous thickener solution (7) mixing the thickener solution with the emulsion

Usages:

The foam formulations of the present invention can be used for all cosmetic and dermatological (as medicinal product or drug) purposes. For example, the formulations can be used as skin care products or skin cleansing products. They can also serve as carriers for active ingredients and be used in the medical dermatological field. In particular, the formulations can be used as sunscreens.

Some of the compositions below are disclosed in the tables by way of example, without these being intended to represent a restriction. Numerous variations and developments can be made by those skilled in the art without the need for inventive activity.

examples

Example 1: Composition for preparing a foam for application to the scalp

component INCI KS#01 KS#02 KS#03 KS#04 Lauromacrogol Laureth-9 3 3 0 0 cocoamidopropyl betaine Cocoamidopropyl Betaine 3 0 3 0 Plantacare 2000 decyl glucosides 0 2 0 2 Myritol 318 Caprylic/Capric Triglycerides 1 1 1 1 Hydrolite 5 Pentylene Glycol 3 3 3 3 rheocare XGN Xanthan Gum 0 0 0.5 0.5 hydrogain Hydrogenated Lecithin and Opuntia Ficus-Indica Seed Oil and Citric Acid 2 2 2 2 SLM 2038 Aqua, Caprylic/Capric Triglycerides, Hydrogenated Phosphatidylcholine, Pentylene Glycol, Glycerin, Butyrospermum Parkii Butter, Squalane 2 2 2 2 water Aqua 89 90 88.5 89.5

Example 2: Composition for preparing a foam for use on irritated facial skin without using a lamellar concentrate

component INCI GS#01 GS#02 cocoamidopropyl betaine Cocoamidopropyl Betaine 3 0 Oramix decyl glucosides 0 2 Myritol 318 Caprylic/Capric Triglycerides 15 15 shea butter Butyrospermum Parkii butter 3 3 squalane squalanes 0.5 0.5 Ceramide-3 Ceramide-3 0.1 0.1 Phospholipon 90H Hydrogenated phosphatidylcholine 3 3 Hydrolite 5 Pentylene Glycol 3 3 Keltrol CG Xanthan Gum 0.5 1 Bioecolia Alpha Glucan Oligosaccharides 1 1 glycerin glycerin 3 3 water Aqua 67.9 68.4

Example 3: Composition for making a foam for use on acne

component INCI Mask #01 Plantacare 2000 decyl glucoside 2.5 Eutanol G octyldodecanol 2.5 Cetiol OE dicaprylyl ether 2.5 Cetiol AB C12-15 Alkyl Benzonates 2.5 glycerin glycerin 2.5 Symdiol 68 1,2-Hexanediol and Caprylyl Glycol 2 rheocare XGN Xanthan Gum 0.75 SLM Eco Aqua, Caprylic/Capric Triglyceride, Hydrogenated Phosphatidylcholine, Pentylene Glycol, Glycerin, Butyrospermum Parkii (Shea) Butter, Squalane, Ceramide NP 2.5 salicylic acid Salicylic Acid 0.8 glycolic acid Glycolic Acid 4 Bioecolia Bioecolia 1 water Aqua 76.45

Example 4: Composition for preparing a foam for use on dry skin

ingredient INCI PS Base #1 PS Base #2 PS Base #3 PS Base #4 Plantacare 2000/Oramix NS10 decyl glucoside 2 2 2 2 Montanov S Cocoglucosied & Coconut Alcohol 0.5 0.5 0.5 0.5 Cetiol V decyl oleate 0 5 0 5 Eutanol G octyl dodecanol 0 5 0 5 Cetiol CC dicaprylyl carbonates 3 0 3 0 Cetiol OE dicaprylyl ether 3 0 3 0 Cetiol sensoft Propylheptyl Caprylate 3 0 3 0 Tegosoft CT° caprylic/capric acid triglyceride 3 0 3 0 glycerin glycerin 5 5 5 5 urea urea 5 olive oil Olea Europaea (Olive) Fruit Oil 5 5 almond oil Prunus amygdalus dulcis (Sweet Almond) Oil) 5 5 Dermosoft Octiol caprylyl glycol 1 1 1 1 SOLAGUM™ AX Xanthan Gum & Acacia Gum 1 0 0 0 rheocare XGN Xanthan Gum 0 1 1 0 Sensocel stab 026 N Microcrystalline Cellulose and Xanthan Gum 0.75 Lactic Acid (90%) Lactic Acid 1 1 1 1 Na lactate (50%) sodium lactate 4 4 4 4 SLM 2026 Aqua, Caprylic/Capric Triglycerides, Hydrogenated Phosphatidylcholine, Pentylene Glycol, Glycerin, Butyrospermum Parkii (Shea) Butter, Squalane, Ceramide NP 5 5 5 5 water Aqua 63.5 65.5 58.5 65.7 5

Example 4: Preparation of an emulsion

• Zunächst wird die Ölphase durch Mischen der Komponenten gebildet wozu die Komponenten ggf. und unter Rühren bis 80°C erwärmt werden. Anschließend wird die Wasserphase durch Mischen der Komponenten gebildet und ebenfalls unter Rühren auf bis zu 80°C erwärmt. Sinnvollerweise werden beide Phasen auf die gleiche Temperatur gebracht. Beide Phasen werden zusammengegeben und homogenisiert (z.B. unter Anwendung eines Rotor-Stator-Homogenisators oder einer anderen üblichen Emulgiermaschine, z.B. Hochdruckhomogenisator etc.).

The compositions according to Examples 1-3 are converted into an emulsion as follows:

• First, the oil phase is formed by mixing the components, for which purpose the components may be heated to 80°C while stirring. The water phase is then formed by mixing the components and also heated to up to 80°C while stirring. It makes sense to bring both phases to the same temperature. Both phases are combined and homogenized (for example using a rotor-stator homogenizer or another conventional emulsifying machine, for example a high-pressure homogenizer, etc.).

Optionally, one or more other membrane-forming substances are added and homogenized again.

Example 5 Production of a pump foam

50 g each of the compositions according to Examples 1-3 are filled into a 100 ml standard plastic, aluminum, glass or tinplate can which is fitted with a standard pump foam head (e.g. Frapak foam pump type M3, Frapak foam pump type F2, pack tech PTY FOAM FLEUR, pack tech PTY-FOAM-OLAYA, Quadpack 3 mesh Foamer) is closed. By manually actuating the pump foam head, an approximately walnut-sized amount of foam is obtained, which is fine-pored and very homogeneous. The foam remains stable at room temperature for at least 5 minutes without showing appreciable drainage. The foam can be applied to the skin very gently and almost without touching it and is distributed very evenly. Alternatively, the foam can be generated by an electrically operated, propellant-free foam pump.

Example 6: Comparative example

50 g each of the compositions according to Examples 1 or 2 of EP 1496852 B1 are filled into a 100ml standard plastic, aluminium, glass or tinplate can, which is closed with a standard pump foam head Frapak foam pump type M3. No foam is obtained by manually operating the pump foam head. Actuation of the pump leads to delivery of the emulsion, but there are no air bubbles in this emulsion, so that no foam is produced.

Corresponding tests with other pump foam heads, namely Frapak foam pump type F2, pack tech PTY-FOAM-FLEUR, pack tech PTY-FOAM-OLAYA, Quadpack 3 mesh Foamer, lead to very similar results. No foam is obtained.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• EP 2020221 B1 [0002]
• EP 1496852 B1 [0003, 0071]

Claims (11)

Formulation for the propellant-free production of a foam by means of a mechanical pump head or an electrically operated, propellant-free foam pump, comprising an oil-in-water emulsion, formed by an oil phase and a water phase, the oil phase comprising at least one membrane-forming substance which, in the foam formulation, has a lamellar arranged membrane, characterized by a proportion of 0.5-5% by weight of one or more alkylpolyglucosides and/or alkylamidobetaines. Wording according to claim 1 , wherein decyl glucoside is selected as the alkyl polyglucoside. Wording according to claim 1 or 2 , wherein cocoamidopropyl betaine is selected as the alkylamidobetaine. Formulation according to one of Claims 1 - 3 , also containing 0.25-2.5% by weight of xanthan gum and/or acacia gum. Formulation according to one of Claims 1 - 4 , also containing 0.25-1.5% by weight of Phospholipon 80H and/or Phospholipon 90H. Formulation according to one of Claims 1 - 5 , wherein the at least one membrane-forming substance is a lipid, preferably a triglyceride, particularly preferably caprylic acid / capric acid triglyceride. Formulation according to one of Claims 1 - 6 wherein the lipid further comprises lecithin. Formulation according to one of Claims 1 - 7 , wherein the emulsion further comprises at least one thickener, which is preferably selected from the group consisting of hydroxypropylmethylcellulose, xanthan gum, acacia gum, microcrystalline cellulose and mixtures of the aforementioned. Formulation according to one of Claims 1 - 8th , wherein the emulsion further comprises pentylene glycol, hexylene glycol and/or caprylyl glycol as a stabilizer. Formulation according to one of Claims 1 - 9 , wherein the emulsion is also selected at least one active ingredient from the group consisting of hydroviton, pyrrolidone carboxylic acid and its salts, lactic acid and its salts, glycerol, sorbitol, propylene glycol, urea, collagen, elastin, silk protein, hyaluronic acid, pentavitin, ceramides, Panthenol, niacin, α-tocopherol and its esters, vitamin A, vitamin C, galates, polyphenols, panthenol, bisabolol, phytosterols, glucocorticoids, antibiotics, analgesics, antiphlogistics, antirheumatics, antiallergics, antiparasitics, antipruritic drugs, antipsoriatics, retinoids, local anesthetics, vein therapeutics , keratolytics, hyperemic substances, coronary therapeutics (nitrates/nitro compounds), virus statics, cytostatics, hormones, active substances that promote wound healing, growth factors, enzyme preparations, insecticides and plant material such as, or plant extracts from, algae, aloe, arnica, beard lichen, comfrey, birch, nettle, Calendula, oak, ivy, witch hazel, henna, hops en, chamomile, butcher's broom, peppermint, marigold, rosemary, sage, green tea, tea tree, horsetail, thyme and walnut or mixtures thereof. Formulation according to one of Claims 1 - 10 , filled in a plastic, aluminum, tinplate or glass container closed with a mechanical pump foam head.