Method for preparing cosmetic water-in-oil emulsions from glycerol-in-oil emulsions

Abstract

A process for preparing a cosmetic water-in-oil emulsion in which a glycerol-in-oil emulsion containing a) glycerol, b) one or more lipids that are liquid at room temperature and atmospheric pressure, c) one or more waxes, d) one or more salts, e) polyglycerol-3 polyricinoleate (INCI: polyglycerol-3-polyricinoleate) is added with water in a storage container and shaken or stirred.

Description

Technical Field

[0001] The present invention relates to a method for preparing a cosmetic water-in-oil emulsion from a cosmetic glycerol-in-oil emulsion, wherein the glycerol-in-oil emulsion contains glycerol, one or more lipids that are liquid at room temperature and pressure, one or more waxes, salts and polyglyceryl-3 polyricinoleate (INCI: polyglyceryl-3-polyricinoleate). Background Art

[0002] The desire to look beautiful and attractive is human nature. Although ideals of beauty have changed over time, the quest for a flawless appearance has always been a goal. An important component of a beautiful and attractive appearance is the condition and appearance of the skin.

[0003] In order for the skin to be able to fully develop its biological functions, it needs to be cleaned and cared for regularly. Skin cleansing is used to remove residues of dirt, sweat and dead skin particles, which are ideal breeding grounds for various pathogens and parasites. Skin care products are generally used to hydrate and moisturize the skin. They are usually added with active ingredients, which regenerate the skin and, for example, should prevent and reduce premature skin aging (such as the formation of fine lines, wrinkles) or protect against the negative effects of ultraviolet radiation. Skin care products are usually provided in the form of emulsions, in which the external aqueous phase contains stably finely distributed oil droplets (O / W emulsions), or in which stable finely distributed water droplets are present in a continuous oil phase (W / O emulsions).

[0004] Skin care lotions are usually sold as ready-to-use products. However, these products have the disadvantage that, due to their more or less high water content, they have a high weight. The high weight leads to higher energy and fuel consumption, especially during transportation.

[0005] It was therefore an object of the present invention to develop a cosmetic emulsion in which the weight of the formulation is reduced and the energy and / or fuel consumption is lower during transportation, in particular in large numbers of containers.

[0006] Most cosmetic emulsions are produced by the industrial manufacturers of the product with the aid of a "hot-hot" or "hot-cold" process, in which an oil phase, which is usually heated to above 80° C., is mixed with a likewise heated ("hot-hot") or room temperature ("hot-cold") aqueous phase under stirring, homogenized and then cooled. All of these production process steps involve relatively high energy consumption. The object of the present invention was therefore to develop a cosmetic emulsion in which the energy consumption in the industrial production process is reduced.

[0007] The implementation of these two projects should also significantly reduce the "CO2 footprint", that is, the CO2 emissions associated with the production and transportation of products.

[0008] Last but not least, consumers often find conventional finished cosmetic products boring to use. They only to a small extent satisfy the desire of many consumers to participate in the production of cosmetics themselves (or "playfulness"), as well as the average consumer's expectations for products with a potentially low "CO2 footprint". Summary of the invention

[0009] It was therefore an object of the present invention to develop a cosmetic product which meets these consumer wishes.

[0010] Surprisingly, these objects are solved by a process for producing a cosmetic water-in-oil emulsion, wherein a

[0011] a) glycerol;

[0012] b) one or more lipids that are liquid at room temperature and pressure;

[0013] c) one or more waxes;

[0014] d) one or more salts;

[0015] e) Polyglyceryl-3 Polyricinoleate (INCI: Polyglyceryl-3-Polyricinoleate),

[0016] For glycerin-in-oil emulsions, add water to the storage container and shake or stir.

[0017] With the glycerol-in-oil emulsion according to the invention, the user / consumer can produce a stable, ready-to-use W / O emulsion for skin and body care by simply adding water with brief shaking, without having to resort to technically or time-intensive production processes.

[0018] Although there have been attempts in the past to develop water-poor or even water-free "pre-emulsions" and to offer consumers the opportunity to produce care lotions in a home environment, production is either relatively complex, since, for example, warm water processing is necessary or complex equipment such as stirrers ("mixers") must be used. Alternatively, the end product produced at home is not satisfactory in terms of quality, since a truly finely dispersed, homogeneous emulsion is not formed. The regionally varying salt content of the water (e.g. "water hardness") also poses difficulties, since this has a significant influence on the formation and stability of the emulsion. What works in Hamburg may not necessarily work in Munich.

[0019] Within the scope of the present disclosure, the term "according to the invention" and the like always refers to the process and the process products according to the invention.

[0020] For the process according to the invention, it is particularly advantageous according to the invention if the preparation contains no additional water other than the water contained in the glycerol and the salt. An additional low water content would destabilize the glycerol-in-oil emulsion and lead to phase separation. Only at higher water concentrations (greater than 30% by weight) can a stable W / O emulsion system be formed again, as in the W / O emulsion produced according to the process according to the invention.

[0021] It is therefore preferred according to the invention to use glycerol having a water content of at most 1% by weight, relative to the glycerol. Ideally, 99% or 99.5% glycerol is used.

[0022] According to the invention, it is advantageous to use alkaline earth metal salts as salts in the glycerol-in-oil emulsions.

[0023] The invention according to a preferred embodiment of the invention is characterized in that magnesium sulfate is used as salt in the glycerol-in-oil emulsion.

[0024] Furthermore, it is particularly preferred according to the invention to use magnesium sulfate heptahydrate (MgSO4.7H2O) as magnesium sulfate. This may be surprising at first glance, but anhydrous magnesium sulfate is significantly more difficult to incorporate into glycerol-in-oil emulsions than magnesium sulfate containing water of crystallization. Anhydrous magnesium sulfate is poorly soluble in glycerol and tends to form lumps.

[0025] According to the invention, it is advantageous to use as lipids that are liquid at room temperature and pressure one or more compounds selected from the following group: caprylic / capric triglyceride (INCI: Caprylic / Capric Triglyceride), ethylhexyl stearate (INCI; Ethylhexyl Stearate), triisostearin (INCI: Triisostearin), coco-caprylate / caprate (INCI: Coco-Caprylate Caprate), octyldodecanol, cocoglycerides (INCI: Coco-Glycerides), vegetable oil (INCI: Vegetable Oil), dicaprylyl ether, sunflower oil (INCI: Sunflower Oil).

[0026] Here, caprylic / capric triglyceride (INCI: Caprylic / capric triglyceride), ethylhexyl stearate (INCI; Ethylhexyl Stearate) and triisostearin (INCI: Triisostearin) are preferably used according to the invention.

[0027] If the oil phase of the glycerin-in-oil emulsion contains caprylic / capric triglyceride (INCI: Caprylic / capric triglyceride), it is preferred according to the invention that this compound is used in a concentration ranging from 10 to 50% by weight relative to the total weight of the glycerin-in-oil emulsion.

[0028] If the oily phase of the glycerin-in-oil emulsion contains ethylhexyl stearate (INCI: ETHYLHEXYL STEARATE), it is preferred according to the invention that this compound is used in a concentration ranging from 10 to 50% by weight relative to the total weight of the glycerin-in-oil emulsion.

[0029] If the oil phase of the glycerin-in-oil emulsion contains triisostearin (INCI: TRIISOSTEARIN), it is preferred according to the invention that this compound is used in a concentration ranging from 10 to 50% by weight relative to the total weight of the glycerin-in-oil emulsion.

[0030] According to the invention, it is advantageous to use as wax one or more compounds selected from the following group: hydrogenated rapeseed oil (INCI: HYDROGENATED RAPESEED OIL), hydrogenated castor oil (INCI: HYDROGENATED CASTOR OIL), hydrogenated vegetable oil (INCI: HYDROGENATED VEGETABLE OIL), glyceryl stearate (INCI: STEARIC ACID). In this context, it is preferred according to the invention to use hydrogenated rapeseed oil (INCI: HYDROGENATED RAPESEED OIL).

[0031] If the oily phase of the glycerin-in-oil emulsion contains hydrogenated rapeseed oil (INCI: Hydrogenated Rapeseed Oil), it is preferred according to the invention to use this compound in a concentration of 0.5 to 5% by weight relative to the total weight of the glycerin-in-oil emulsion.

[0032] An advantageous embodiment of the invention according to the invention is characterized in that the preparation contains 20 to 30% by weight of glycerol relative to the total weight of the glycerol-in-oil emulsion.

[0033] A further feature of an advantageous embodiment of the invention is that the preparation contains a total amount of 40 to 60 wt. % of lipids of feature b) which are liquid at room temperature and pressure, relative to the total weight of the glycerol-in-oil emulsion.

[0034] Furthermore, it is advantageous according to the invention if the preparation contains from 0.5 to 5% by weight of the wax of feature c), relative to the total weight of the glycerol-in-oil emulsion.

[0035] Furthermore, it is advantageous according to the invention if the preparation contains from 1 to 4% by weight of magnesium sulfate, relative to the total weight of the glycerol-in-oil emulsion.

[0036] Last but not least, an advantageous embodiment of the invention according to the invention is characterized in that the preparation contains 10 to 20% by weight of polyglyceryl-3 polyricinoleate (INCI: POLYGLYCERYL-3-POLYRICINOLATE), relative to the total weight of the glycerin-in-oil emulsion.

[0037] Furthermore, the glycerin-in-oil emulsion according to the present invention may contain other ingredients generally used in cosmetic emulsions, such as cosmetic active ingredients, UV filters, preservatives, antioxidants, powder raw materials, and the like.

[0038] It is advantageous according to the invention if the glycerol-in-oil emulsion according to the invention is contained in a crucible or bottle made of tinplate, glass, polypropylene, polyethylene or polyethylene terephthalate with a watertight cover. It is preferred according to the invention that the filling level in the storage container is selected so that the storage container can also accommodate three times the amount of water.

[0039] For the process according to the invention, it is advantageous according to the invention to use a crucible or bottle made of tinplate, glass, polypropylene, polyethylene or polyethylene terephthalate with a watertight cover as storage container and to form the emulsion by shaking.

[0040] Furthermore, an advantageous embodiment of the process according to the invention is characterized in that the process is carried out at a temperature of 10 to 30° C.

[0041] Furthermore, for this method, it is advantageous according to the invention if the weight ratio of glycerol-in-oil emulsion to water is from 25:75% by weight to 60:40% by weight. It is preferred according to the invention if the weight ratio of glycerol-in-oil emulsion to water is from 30:70% by weight to 50:50% by weight, particularly preferably 2:1.

[0042] Here, the amount of water used can be used to adjust the viscosity of the W / O emulsion, which can be obtained from the glycerol-in-oil emulsion by adding water. Here, low water contents (60-75% by weight) lead to highly viscous preparations, especially creams. In contrast, lower amounts of water (40-60% by weight) result in thinner lotions.

[0043] Furthermore, it is advantageous according to the invention if the water has a temperature of at least 10° C. It is preferred according to the invention if the water has a temperature of 15 to 25° C.

[0044] Last but not least, belonging to the method according to the invention, in an advantageous embodiment of the invention, the shaking of the storage container is carried out in the hand and the shaking process lasts for a maximum of 90 seconds. Here, it is preferred according to the invention that the duration of the shaking process is 10 to 30 seconds.

[0045] According to the present invention, a cosmetic water-in-oil emulsion is also prepared according to the process of the present invention.

[0046] Advantageously according to the invention it is characterized in that it is in the form of a cream or lotion. DETAILED DESCRIPTION

[0047] Comparative test

[0048] The effects of the present invention can be illustrated by the following experiments:

[0049] The following concentrates (=glycerol-in-oil emulsions) and activation times prior to formation of water-in-oil emulsions (=process products) were investigated.

[0050] Emulsifier comparison test

[0051] INCI (amount in % by weight) Concentrate G11 Concentrate G12 Concentrate G13 Concentrate G14 Concentrate G78 Polyglycerol-3-polyricinoleate 14 14 Diisostearyl Polyglyceryl-3 Dimer Dilinoleate 14 Polyglyceryl-4 Diisostearate / Polyhydroxystearate / Sebacate 14 Polyglyceryl-3 diisostearate + water 14 Polyglyceryl-2 dipolyhydroxystearate 14 Caprylic / capric triglyceride 19 19 19 19 19 Ethylhexyl stearate 17 17 17 17 17 Hydrogenated Rapeseed Oil 3 3 3 3 3 Triisostearate 17 17 17 17 17 essence 1 glycerin 28 28 28 28 28 Magnesium sulfate 3 3 3 3 3 Concentrate viscosity after 1 day 550 mPas 2600 mPas 550 mPas 550 mPas 700 mPas Concentrate stability after 1 day at 25°C normal normal Obvious oil separation Obvious oil separation Obvious oil separation Concentrate stability after 7 days at 25°C normal Slight oil separation Obvious oil separation Obvious oil separation Obvious oil separation Pot life for W / O emulsion formation 30% concentrate and 70% tap water 17 seconds 19 seconds 140 seconds 80 seconds 9 seconds

[0052] Preparation of concentrates (=glycerol-in-oil emulsions) in the laboratory:

[0053] The emulsifiers and fat-soluble raw materials in the oil phase are melted at 80°C and then homogenized until all components have reached a liquid aggregate state. At 75°C, the components of the hydrophilic phase are dissolved in glycerol with stirring using a heatable magnetic stirrer until the liquid is clear. During homogenization (e.g. using an IKA T25 digital Ultra Turrax), when both phases have reached a temperature of 75-80°C, the glycerol phase is added to the oil phase. The phases are combined at a speed of 8000 rpm. After the phases have been combined, homogenization is performed for a further 3 minutes at a speed of 11,200 rpm. Subsequently, the concentrate is cooled with stirring using an IKA stirrer and, if necessary, homogenized a second time at about 35°C after the addition of the flavor.

[0054] Preparation of W / O emulsion and determination of activation time:

[0055] To prepare the aqueous W / O emulsion and determine the activation time before its formation, first weigh the concentrate (= glycerol-in-oil emulsion) and water in a total amount of 400 g into a 500 ml wide-mouth bottle (e.g. 30% to 70%: 120 g concentrate and 280 g water). The container is then tightly closed and shaken by hand until the resulting W / O emulsion appears homogeneous, at which point the timer is stopped.

[0056] If a homogeneous W / O emulsion was not formed within three minutes of shaking, no further processing was performed.

[0057] Wax comparison test

[0058] INCI (amount in % by weight) Concentrate G21 Concentrate G22 Concentrate G23 Concentrate G24 Concentrate G25 Concentrate G26 Polyglycerol-3-polyricinoleate 13.9 13.9 13.9 13.9 13.9 13.9 Caprylic / capric triglyceride 19.4 19.4 19.4 19.4 19.4 19.4 Ethylhexyl stearate 16.7 16.7 16.7 16.7 16.7 16.7 Triisostearate 16.7 16.7 16.7 16.7 16.7 16.7 Hydrogenated vegetable oil 2.8 Cetyl Alcohol 2.8 Glyceryl Stearate 2.8 Cetyl Palmitate 2.8 Hydrogenated Coco-Glycerides 2.8 Myristyl myristate 2.8 glycerin 27.8 27.8 27.8 27.8 27.8 27.8 Magnesium sulfate 2.8 2.8 2.8 2.8 2.8 2.8 Pot life for W / O emulsions 30% concentrate and 70% tap water 17 seconds > 3 minutes 120 seconds > 3 minutes > 3 minutes > 3 minutes

[0059] INCI (amount in % by weight) Concentrate G27 Concentrate G28 Concentrate G30 Concentrate S147 Concentrate S158 Polyglyceryl-3 Polyricinoleate 14.1 13.9 13.9 13.9 13.9 Caprylic / capric triglyceride 19.7 19.4 19.4 19.4 20.5 Ethylhexyl stearate 16.9 16.7 16.7 16.7 17.5 Triisostearate 16.9 16.7 16.7 16.7 17.5 Hydrogenated vegetable oil 1.4 1.4 Shea Butter 2.8 Hydrogenated Rapeseed Oil 1.4 2.8 glycerin 28.2 27.8 27.8 27.8 27.8 Magnesium sulfate 2.8 2.8 2.8 2.8 2.8 Pot life for W / O emulsions 30% concentrate and 70% tap water 90 seconds 180 seconds 35 seconds 10 seconds 150 seconds

[0060] Magnesium sulfate / wax comparison test

[0061] The composition of the W / O emulsion is prepared by shaking the concentrate with an appropriate amount of water.

[0062] INCI (amount in % by weight) W / O Emulsion SB 19 W / O Emulsion SB 20 W / O Emulsion SB 22 Polyglyceryl-3 Polyricinoleate 5 5 5 Caprylic / capric triglyceride 7 7 7 Ethylhexyl stearate 6 6 6 Hydrogenated Rapeseed Oil 1 1 Triisostearate 6 6 6 glycerin 10 10 10 Magnesium sulfate 1 1 water 64 65 65 Droplet size Mastersizer d 43 3.5 µm 9.4 µm 6.7 µm Activation time 12 seconds 12 seconds 150 seconds

[0063] Example

[0064] Preparation of concentrates (glycerol-in-oil emulsions)

[0065] Dosage information can be found in the example recipes in the table.

[0066] The fat phase with polyglyceryl-3-polyricinoleate, caprylic / capric triglyceride, ethylhexyl stearate, hydrogenated rapeseed oil and triisostearin is weighed into a beaker and heated to 80° in a water bath with repeated stirring using a stirring thermometer. Magnesium sulfate is weighed into a beaker together with glycerol and dissolved until clear on a hot plate at 75°C with a magnetic stirrer under vigorous stirring. The hot glycerol phase is dispersed into the hot fat phase with the aid of an Ultra-Turrax at 8000 rpm for 2 minutes. Disperse again at 11200 rpm for 3 minutes. Then cool to 35°C with the aid of an IKA stirrer. Stir the essence into the cooled glycerol-in-oil emulsion and homogenize again with an Ultraturrax at 11200 rpm for two minutes.

[0067] INCI (unit: grams) Concentrate G55 Polyglycerol-3-polyricinoleate 90 g Caprylic / capric triglyceride 126 g Ethylhexyl stearate 108 g Hydrogenated Rapeseed Oil 18 g Triisostearate 108 g essence 6.3 g glycerin 180 g Magnesium sulfate 18 g 654.3 g

[0068] Depending on the amount of water selected, emulsions of different viscosities can be produced with the same concentrate. Attached is an example of the W / O emulsion thus obtained.

[0069] Preparation of W / O emulsion and determination of activation time in the laboratory:

[0070] To prepare the aqueous W / O emulsion and determine the activation time, first the concentrate (= glycerol-in-oil emulsion) and then a total of 400 g of tap water were weighed into a 500 ml wide-mouth bottle (see table for details). Afterwards, the container was tightly closed and shaken quickly by hand (as if mixing a cocktail) until the emulsion looked homogeneous, at which point the timer was stopped until the formation of the W / O emulsion was complete. If a homogeneous emulsion was not formed within three minutes of shaking, no further shaking was done.

[0071] W / O Emulsion T13 W / O Emulsion T14 W / O Emulsion T15 Glycerin-in-oil emulsion G55 120 g 160 g 200 g Tap water 20°C 280 g 240 g 200 g Pot life for W / O emulsion formation 8 seconds 5 seconds 3 seconds Viscosity at 25°C Rheomat 123 14000 mPas 10000 mPas 4600 mPas

[0072] The composition of the above W / O emulsions is given in the following table:

[0073] INCI (Unit: weight %) W / O Emulsion T13 W / O Emulsion T14 W / O Emulsion T15 Polyglycerol-3-polyricinoleate 4.1 5.5 6.9 Caprylic / capric triglyceride 5.8 7.7 9.6 Ethylhexyl stearate 5.0 6.6 8.3 Hydrogenated Rapeseed Oil 0.8 1.1 1.4 Triisostearate 5.0 6.6 8.3 essence 0.3 0.4 0.5 glycerin 8.3 11.0 13.8 Magnesium sulfate 0.8 1.1 1.4 water 70 60 50 Pot life for W / O emulsion formation 8 seconds 5 seconds 3 seconds Viscosity at 25°C Rheomat 123 14000 mPas 10000 mPas 4600 mPas

[0074] Other examples of glycerol-in-oil emulsions according to the invention:

[0075] INCI (Unit: weight %) Concentrate B 1 Concentrate B 2 Concentrate B 3 Concentrate B 4 Concentrate B 5 Polyglycerol-3-polyricinoleate 14.0 13.9 13.9 13.9 10.0 Caprylic / capric triglyceride 17.1 19.4 19.4 19.4 20.0 Dioctyl ether 17.1 Hydrogenated Rapeseed Oil 5.7 2.8 2.8 2.8 5.0 Hydrogenated vegetable oil 5 Triisostearate 17.0 16.7 16.7 16.7 Octyldodecanol 16.7 10 Sunflower Oil 20 Coco-Caprylate / Caprate 16.7 Cocoglycerides 16.7 glycerin 28.0 27.8 27.8 27.8 30.0 Magnesium sulfate 1.0 2.8 2.8 2.8 2.5

[0076] INCI (Unit: weight %) Concentrate G 80 Concentrate G 87 Concentrate G 90 Concentrate G 92 Concentrate S 100 Polyglycerol-3-polyricinoleate 13.8 13.8 13.8 13.8 13.9 Caprylic / capric triglyceride 19.3 16.7 Ethylhexyl stearate 16.5 Hydrogenated Rapeseed Oil 2.8 2.8 2.8 2.8 2.8 Triisostearate 16.5 19.4 Cocoglycerides 52.2 Vegetable oil 52.2 Hybrid Sunflower Seed Oil + Lecithin + Ascorbyl Palmitate 52.2 Dicaprylyl Ether + Tocopherol 16.7 Glyceryl Stearate 2.8 essence 1.0 1.0 1.0 1.0 glycerin 27.5 27.5 27.5 27.5 27.8 Calcium chloride 2.8 Magnesium sulfate 2.8 2.8 2.8

Claims

1. A method for producing a cosmetic water-in-oil emulsion, wherein: will contain a) glycerol, b) one or more lipids that are liquid at room temperature and pressure, c) one or more waxes, d) one or more salts, e) Polyglyceryl-3 Polyricinoleate (INCI: Polyglyceryl-3-Polyricinoleate) For glycerin-in-oil emulsions, add water to the storage container and shake or stir.

2. The method according to claim 1, characterized in that The glycerin-in-oil emulsion contains no additional water beyond that contained in the glycerin and salt.

3. The method according to any one of the preceding claims, characterized in that Alkaline earth metal salts are used as salts in glycerin-in-water emulsions.

4. The method according to any one of the preceding claims, characterized in that Magnesium sulfate was used as the salt in a glycerol-in-oil emulsion.

5. The method according to any one of the preceding claims, characterized in that The glycerol used has a water content of at most 1% by weight, relative to the glycerol.

6. The method according to any one of the preceding claims 4 to 6, characterized in that Magnesium sulfate heptahydrate (MgSO4.7H2O) was used as magnesium sulfate.

7. The method according to any one of the preceding claims, characterized in that As lipids that are liquid at room temperature and pressure, one or more compounds selected from the following group are used: caprylic / capric triglyceride (INCI: Caprylic / Capric Triglyceride), ethylhexyl stearate (INCI; Ethylhexyl Stearate), triisostearate (INCI: Triisostearate), coco-caprylate / caprate (INCI: Coco-Caprylate Caprate), octyldodecanol, cocoglycerides (INCI: Coco-Glycerides), vegetable oil (INCI: Vegetable Oil), dicaprylyl ether, sunflower oil (INCI: Sunflower Oil).

8. The method according to any one of the preceding claims, characterized in that As wax, one or more compounds selected from the following group are used: hydrogenated rapeseed oil (INCI: HYDROGENATED RAPESEED OIL), hydrogenated castor oil (INCI: HYDROGENATED CASTOR OIL), hydrogenated vegetable oil (INCI: HYDROGENATED VEGETABLE OIL), glyceryl stearate (INCI: STEARIC ACID GLYCERYL).

9. The method according to any one of the preceding claims, characterized in that The formulation contains 20 to 30% by weight of glycerol relative to the total weight of the glycerol-in-oil emulsion.

10. The method according to any one of the preceding claims, characterized in that The formulation contains a total amount of 40 to 60% by weight of lipids of feature b) that are liquid at room temperature and pressure, relative to the total weight of the glycerol-in-oil emulsion.

11. The method according to any one of the preceding claims, characterized in that The formulation contains from 0.5 to 5% by weight of the wax of characteristic c) relative to the total weight of the glycerol-in-oil emulsion.

12. The method according to any one of the preceding claims, characterized in that The formulation contains 1 to 4% by weight of magnesium sulfate relative to the total weight of the glycerin-in-oil emulsion.

13. The method according to any one of the preceding claims, characterized in that The formulation contains 10 to 20% by weight of polyglyceryl-3 polyricinoleate (INCI: POLYGLYCERYL-3-POLYRICINOLATE) relative to the total weight of the glycerin-in-oil emulsion.

14. The method according to any one of the preceding claims, characterized in that In a storage container consisting of a crucible or bottle made of tinplate, glass, polypropylene, polyethylene or polyethylene terephthalate with a watertight cover, water is added and an emulsion is formed by shaking, the storage container containing the glycerol-in-oil emulsion according to any one of the preceding claims.

15. The method according to any one of the preceding claims, characterized in that The process is carried out at a temperature of 10 to 30°C.

16. The method according to any one of the preceding claims, characterized in that The weight ratio of the glycerol-in-oil emulsion to water is 25:75 wt % to 60:40 wt %.

17. A method according to any one of the preceding claims, characterised in that The temperature of the water is at least 10°C.

18. A method according to any one of the preceding claims, characterised in that The temperature of the water is 15 to 25°C.

19. The method according to any one of the preceding claims, characterized in that The shaking of the storage container is carried out by hand and the shaking process lasts for a maximum of 90 seconds.

20. A cosmetic water-in-oil emulsion prepared according to the method of any preceding claim.

21. The water-in-oil emulsion according to claim 20, characterized in that The water-in-oil emulsion is in the form of a cream or a lotion.