Cosmetic product for spray application

Abstract

The invention relates to cosmetic products for spray application, which have advantages in terms of versatility (option for spraying different preparations with one device), resource consumption, the most even application possible and great effectiveness alongside small quantities being used, comprising a) a cosmetic preparation, b) a device for the finely distributed application of the cosmetic preparation a), comprising b1) a storage container for the cosmetic preparation a), b2) a pump or comparably operating delivery element for discharging the cosmetic preparation a) out of the storage container b1), b3) a pressure chamber, in which the cosmetic preparation a) discharged out of the storage container b1) can be subjected to a pressure increase, comprising b3a) an inlet valve or a comparably operating closure element in order to be able to seal the cosmetic preparation a), conveyed from the storage container b1) into the pressure chamber b3) by the delivery element, relative to the ambient environment, b3b) an outlet valve or a comparably operating closure element in order to be able to apply the cosmetic preparation a), which is subjected to a pressure increase, from the pressure chamber b3) in a finely distributed manner, wherein, at 25°C, the cosmetic preparation a) has a heat conductivity of 0.02 to 2.0 Wm-1K-1.

Description

[0001] “Cosmetic product for spray application.” The present invention relates to a cosmetic product comprising a device for spray application and a cosmetic preparation to be sprayed. The spray application of cosmetic compositions is established state of the art. Corresponding products are widely available commercially in the field of cosmetics, as well as in many other application areas. The majority of such products are based on a non-reusable pressurized container containing one or more propellants and the cosmetic preparation to be sprayed. By actuating the valve, the propellant expands from the pressurized container and sprays the cosmetic preparation via suitable nozzles. Alternative solutions include pump spray devices, which can be refilled if necessary.which reduces packaging costs. However, in addition to their potential for improving sustainability, both solutions also have the potential to improve the spray pattern and variability, for example, to spray different cosmetic preparations (deodorant, hairspray, etc.). A novel approach to spraying is disclosed in European patent applications EP 3229752 A1, EP 3229917 A1, and EP 322991 A1. According to the teaching of these documents, cosmetic compositions are sprayed by means of a flash evaporation device, which comprises a container defining a closed interior in which the cosmetic preparation can be accommodated, a valve or a similarly acting closing element for closing and opening the interior of the container at least partially filled with the cosmetic preparation, a heating device,to heat the cosmetic preparation located in the closed interior of the container under increased pressure, as well as to release the heated cosmetic preparation from the interior of the container into the environment under reduced pressure, and a nozzle which enables atomization of the cosmetic preparation escaping from the container. The present invention was based on the object of further developing the field of cosmetic products for spray application. In doing so, particular emphasis should be placed on variability (the possibility of spraying different preparations using one device), resource consumption, the most uniform application possible, and high effectiveness with small amounts used. It has now been found that devices with special,Cosmetic preparations whose physical properties are tailored to the device solve this problem. The present invention relates, in a first embodiment, to a cosmetic product, comprising a) a cosmetic preparation, b) a device for the finely distributed application of the cosmetic preparation a), comprising b1) a storage container for the cosmetic preparation a), b2) a pump or a similarly acting conveying element to convey the cosmetic preparation a) out of the storage container b1); b3) a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to a pressure increase, comprising b3a) an inlet valve or a similarly acting closing element,in order to be able to seal the cosmetic preparation conveyed by means of a conveying element b2) from the storage container b1) into the pressure chamber b3) in an environmentally tight manner; b3b) an outlet valve or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely distributed manner, wherein the cosmetic preparation a) at 25°C has a thermal conductivity of 0.02 to 2.0 Wm, -1 K -1Another subject of the present invention is a method for spraying a cosmetic preparation, in which a) a cosmetic preparation is sprayed by means of b) a device for the finely distributed application of the cosmetic preparation a), comprising b1) a storage container for the cosmetic preparation a), b2) a pump or a similarly acting conveying element in order to convey the cosmetic preparation a) out of the storage container b1); b3) a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to an increase in pressure, comprising b3a) an inlet valve or a similarly acting closing element in order to be able to seal the cosmetic preparation conveyed by means of the conveying element b2) from the storage container b1) into the pressure chamber b3) a) in an environmentally tight manner;b3b) an outlet valve or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely dispersed manner, wherein the cosmetic preparation a) has a thermal conductivity of 0.02 to 2.0 Wm at 25°C; -1 K -1The cosmetic product and the method for spraying a preparation are described in more detail below. The cosmetic preparation a) and the device b) are disclosed in more detail, and the method according to the invention is always disclosed in more detail, even if, for linguistic reasons, only the "cosmetic product" is referred to. "The product according to the invention comprises" always means "The product according to the invention comprises" and is used in the method according to the invention." The product according to the invention comprises a cosmetic preparation which has been optimized with regard to its sprayability by having a thermal conductivity of 0.02 to 2.0 Wm at 25°C. -1 K -1Thermal conductivity (sometimes also referred to as thermal conductivity number or thermal conductivity coefficient) is a material property that determines the heat flow through a material due to heat conduction. Thermal conductivity indicates how well a material conducts heat. The thermal conductivity of most materials increases slightly with increasing temperature. At a phase transition or state of aggregation transition (e.g., solid ↔ liquid ↔ gaseous), the conductivity usually changes sharply and abruptly. It has been shown that cosmetic compositions can be sprayed particularly evenly and finely distributed through the devices in the product according to the invention if their thermal conductivity is at least 0.02 Wm -1 K -1 and the value of 2.0 Wm -1 K -1Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) at 25°C has a thermal conductivity of 0.05 to 1.5 Wm -1 K -1 , preferably from 0.1 to 1.0 Wm -1 K -1 and especially from 0.2 to 0.6 Wm -1 K -1 Within the range of 0.02 to 2.0 Wm -1 K -1 And, particularly within the aforementioned narrower ranges, the cosmetic compositions are easy to heat and spray, and tend neither to clog valves nor produce an uneven spray. Lower thermal conductivities below 0.02 Wm -1 K -1 lead to uneven spray patterns and high spray losses, with higher thermal conductivities above 2.0 Wm -1 K -1spray jet widths and homogeneities are unacceptable for a cosmetic application. The thermal conductivity of a cosmetic composition can be adjusted by adjusting the type and amount of its ingredients. The relationship between thermal conductivity and the content of a substance is non-linear even in binary mixtures (e.g. of water and ethanol); in multi-component mixtures, the thermal conductivity can be adjusted to the range according to the invention by adding or omitting, increasing or decreasing the amount of certain ingredients. The product according to the invention can be further optimized with regard to its application properties by the cosmetic preparation a) having a specific heat capacity at 20°C of 1.6 to 5.2 Jg -1 K -1The specific heat capacity of a substance in a particular state is the heat that is added to or removed from a quantity of the substance, divided by the corresponding increase or decrease in temperature and the mass of the substance: c = ^Q / (m ^T) For the cosmetic compositions a) in the product according to the invention, the specific heat capacity can be calculated as the quotient of the heat capacity and the mass m of the body. Since the heat capacity is an extensive state variable, and can therefore be calculated as the sum of the heat capacities of its parts for bodies made up of parts, the specific heat capacity of the cosmetic preparation a) can also be calculated if the heat capacities of the individual ingredients are known.It has been shown that cosmetic compositions can be sprayed particularly evenly and finely distributed by the devices in the product according to the invention if their specific heat capacity at 20°C is at least 1.6 Jg. -1 K -1 and the value of 5.2 Jg -1 K -1 Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) at 20°C has a specific heat capacity of 2.1 to 5.0 Jg -1 K -1 , preferably from 2.6 to 4.6 years -1 K -1 and especially from 3.1 to 4.3 years -1 K -1The specific heat capacity is, as already explained, a temperature-dependent quantity. It has proven particularly advantageous for the product according to the invention if the specific heat capacity of the cosmetic composition a) lies within a certain range of values ​​at higher temperatures. In this case, cosmetic products according to the invention are preferred in which the cosmetic preparation a) has a specific heat capacity of 2.4 to 5.4 Jg- at 50°C. 1 K -1 , preferably from 3.0 to 5.0 Jg -1 K -1 and especially from 3.5 to 4.2 years -1 K -1 Within the range of 1.6 to 5.2 Jg -1 K -1And, particularly within the aforementioned narrower ranges, the cosmetic compositions are easy to heat and spray, and tend neither to clog valves nor produce an uneven spray. Lower specific heat capacities below 1.6 Jg -1 K -1 lead to uneven spray patterns and high spray losses, with higher specific heat capacities above 5.2 Jg -1 K -1Spray jet widths and homogeneities are unacceptable for a cosmetic application. The specific heat capacity of a cosmetic composition can be adjusted by adjusting the type and quantity of its ingredients; in the case of multi-component mixtures, the specific heat capacity can be adjusted to the inventive range by adding or omitting, increasing or decreasing the quantity of certain ingredients. It has further been shown that cosmetic compositions can be sprayed particularly evenly and finely distributed through the devices in the product according to the invention if their thermal expansion coefficient ^ (20°C) 0.0001 to 0.005 K -1The coefficient of thermal expansion ^ is a parameter that describes the behavior of a substance or mixture of substances with regard to changes in its dimensions when the temperature changes. The effect responsible for this is thermal expansion. Thermal expansion depends on the substance used, so it is a substance-specific material constant. Since thermal expansion does not occur uniformly across all temperature ranges in many substances, the coefficient of thermal expansion itself is temperature-dependent and is therefore given for a specific reference temperature or a specific temperature range. With regard to the product according to the invention, the coefficient of thermal expansion ^ describes the change in volume of the cosmetic preparation a) when the temperature increases.It has been shown that cosmetic compositions can be sprayed particularly evenly and finely distributed by the devices in the product according to the invention if their thermal expansion coefficient ^ (20°C) is at least 0.0001 K. -1 and the value of 0.005 K -1 Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) has a thermal expansion coefficient ^ (20°C) of 0.00012 to 0.002 K -1 , preferably from 0.00015 to 0.001 K -1 , particularly preferably from 0.00017 to 0.00105 K -1 and in particular from 0.0002 to 0.0011 K -1The thermal expansion coefficient ^ is, as already explained, a temperature-dependent value. It has proven particularly advantageous for the product according to the invention if the thermal expansion coefficient ^ of the cosmetic composition a) lies within a certain range of values ​​at higher temperatures. In this case, cosmetic products according to the invention are preferred in which the cosmetic preparation a) has a thermal expansion coefficient ^ (50°C) of 0.0001 to 0.0024 K -1 , preferably from 0.0002 to 0.002 K- 1 , particularly preferably from 0.0004 to 0.0016 K -1 and in particular from 0.0006 to 0.0012 K -1 Within the range of 0.0001 to 0.005 K -1And, particularly within the aforementioned narrower ranges, the cosmetic compositions are easy to heat and spray, and tend neither to clog valves nor produce an uneven spray mist. Higher thermal expansion coefficients above 0.005 K -1 lead to uneven spray patterns and high spray losses, with lower thermal expansion coefficients below 0.0001 K -1spray jet widths and homogeneities are unacceptable for a cosmetic application. The adjustment of the thermal expansion coefficient ^ (20°C) or the thermal expansion coefficient ^ (50°C) of a cosmetic composition can be achieved by adjusting the type and amount of its ingredients; in the case of multi-component mixtures, the adjustment of the thermal expansion coefficient ^ within the inventive range is possible by adding or omitting, increasing or decreasing the amount of certain ingredients. The product according to the invention can be further optimized with regard to its application properties if the cosmetic preparation a) has a vapor pressure (according to the Grain-Watson model) of 1200 to 8000 Pa at 20°C. Vapor pressure describes the equilibrium of a substance between its solid or liquid phase and its gas phase. Vapor pressure is a strongly temperature-dependent quantity.The temperature dependence is described by the Clausius-Clapeyron equation, in which the vapor pressure is related to the temperature. d(ln Pv) / dT = ∆H / (RT). 2 ) The quantity ∆H corresponds to the enthalpy of vaporization during transitions from the liquid to the gaseous state. The deviation of the gaseous substance under consideration from the behavior of an ideal gas can be accounted for using the compressibility difference between the two phases. This parameter has a value between 1.00 and 0.91

[0061] . The model for calculating vapor pressure, based on Watson and extended by Grain, is applicable to solid and liquid organic chemicals: ln Pv = Sv / ( ^Z * R) f(Tp, m) + ln(corr) Tp = T / Tb f = 1 – (3-2Tp) m / Tp – 2m(3-2Tp) m-1ln Tp For liquids, m = 0.19 and for solids the following rule applies. If Tρ is greater than 0.6, m has a value of 0.36, Tρ is less than 0.5, m = 1.19. For Tρ between 0.5 and 0.6, m has the value 0.8. Alternatively, m can also be interpolated between 0.38 and 1.19, which is done with a modification by Sage & Sage, in which m takes on different values ​​depending on Tρ: m = 0.4133 – 0.2575*Tρ For solids, the same function for f is used as for liquids. Since the Grain-Watson model is also applicable to solids, it does not require a fugacity correction using the melting point. Nevertheless, it must be determined whether a substance is solid or liquid at the system temperature. Using the equations mentioned above (and now also commercially available computer programs), the vapor pressure of a cosmetic preparation a) can be calculated depending on its composition. It has been shown thatthat cosmetic compositions can be sprayed particularly evenly and finely distributed through the devices in the product according to the invention if their vapor pressure (according to the Grain-Watson model) is at least 1200 Pa and does not exceed a value of 8000 Pa. Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) at 20°C has a vapor pressure (according to the Grain-Watson model) of 1600 to 7000 Pa, preferably of 1800 to 6000 Pa and in particular of 2200 to 5600 Pa. Within the range of 1200 to 8000 Pa and in particular within the aforementioned narrower ranges, the cosmetic compositions are easy to heat up and spray and do not tend to clog valves,nor to form an uneven spray mist. Lower vapor pressures below 1200 Pa lead to more uneven spray patterns and high spray losses; at higher vapor pressures above 8000 Pa, spray jet widths and homogeneities are unacceptable for cosmetic applications. The vapor pressure of a cosmetic composition can be adjusted by adjusting the type and amount of its ingredients; in multi-component mixtures, the vapor pressure can be adjusted to the inventive range by adding or omitting, increasing or decreasing the amount of certain ingredients. The product according to the invention can be further optimized with regard to its application properties by a) adapting the viscosity of the cosmetic preparation to the equipment environment. Viscosity is a measure of the internal flow resistance ("the viscosity") of a cosmetic preparation a). Viscosity is a temperature-dependent variable,which is measured in the context of the present invention at 20°C. Since the viscosity measurement of one and the same preparation at the same temperature also shows a certain dependence on the apparatus used, viscosity values ​​in the context of the present invention are uniformly related to a measurement with a Brookfield DV 2 T viscometer (and as mentioned at 20°C), with the other apparatus parameters (rotational speed, spindle) being adapted to the respective viscosity to be measured. It has proven advantageous to choose low viscosities for certain applications, for example hairsprays or hairsprays. For such compositions, it has been shown that they can be sprayed particularly evenly and finely distributed through the devices in the product according to the invention if their viscosity (Brookfield DV 2 T, spindle 2,10 rpm) at 20°C is at least 10 mPas and does not exceed 100 mPas. Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) has a viscosity (Brookfield DV 2 T, spindle 2, 10 rpm) of 20 to 60 mPas at 20°C. Within the range of 10 to 100 mPas and in particular within the aforementioned narrower ranges, the cosmetic compositions are easy to heat up and spray and tend neither to clog valves nor to form an uneven spray mist. There are other applications (for example, hair treatments, hair conditioners, or hair masks) in which higher viscosity values ​​have proven advantageous. For such compositions, it has been shownthat they can be sprayed particularly evenly and finely distributed by the devices in the product according to the invention if their viscosity at 20°C (Brookfield DV 2 T, spindle 5, 20 rpm) is 500 to 25,000 mPas. Within these limits, narrower value ranges are particularly preferred, so that preferred cosmetic products or methods are characterized in that the cosmetic preparation a) has a viscosity (Brookfield DV 2 T, spindle 5, 20 rpm) of 1,000 to 20,000 mPas at 20°C, preferably of 1,500 to 15,000 mPas and in particular of 2,000 to 10,000 mPas. The viscosity of a cosmetic composition can be adjusted by adjusting the type and amount of its ingredients; in the case of multi-component mixtures, the viscosity can be adjusted to the range according to the invention by adding or omitting,Increasing or decreasing the amount of certain ingredients is possible. The product according to the invention can be further optimized with regard to its application properties by the cosmetic preparation containing a) at least 5% by weight of a first solvent LM1 which is liquid at 20°C and at least 5% by weight of a second solvent LM2 which is liquid at 20°C, wherein the difference between the boiling points of the solvents LM1 and LM2 at 1013.25 mbar is in the range from 5 to 50°C. The product according to the invention therefore contains a mixture of at least two solvents, each of which is present in it to at least 5% by weight of the cosmetic preparation. The boiling point of the first solvent LM1 which is liquid at 20°C at 1013.25 mbar is at a certain temperature x, wherein the boiling point of the second solvent LM2 which is liquid at 20°C is 1013.25 mbar then lies in the range from (x+5)°C to (x+50)°C or in the range from (x-50)°C to (x-5)°C. Of course, the cosmetic preparations may also contain further solvents LM3, LM4, etc., but in this case it is not necessary to maintain the above-mentioned minimum amount of 5 wt.% or the boiling point differences. Irrespective of the fact that it is possible to use further solvents LM3, etc., it is not preferred according to the invention to use them in large quantities or even in quantities exceeding the amount of LM1 or LM2. It is preferred according to the invention if the content of the cosmetic preparation a) of solvents other than LM1 and LM2 that are liquid at 20°C is a maximum of 10 wt.%, preferably a maximum of 7.5 wt.%, and in particular a maximum of 5 wt.%. The sprayability of the cosmetic preparations a) from the device b) is facilitated,if the total amount of solvents LM1 and LM2 does not only correspond to the minimum amount of 10 wt.%, but LM1 and / or LM2 are used in higher amounts. Here, cosmetic products according to the invention are preferred in which the cosmetic preparation a) contains at least 10 wt.%, preferably at least 25 wt.%, more preferably at least 40 wt.% and in particular at least 50 wt.% of the first solvent LM1, which is liquid at 20°C. Further preferred cosmetic products according to the invention are characterized in that the cosmetic preparation a) contains at least 10 wt.%, preferably at least 25 wt.%, more preferably at least 30 wt.% and in particular at least 35 wt.% of the second solvent LM2, which is liquid at 20°C. It is particularly preferred to form the largest possible proportion of the cosmetic preparation a) from LM1 and LM2. Here, cosmetic products according to the invention are preferredin which the cosmetic preparation a) contains – based on its weight – a total amount of solvent LM1 and solvent LM2 (LM1 + LM2) of at least 40 wt.%, preferably of at least 50 wt.%, more preferably of at least 60 wt.%, even more preferably of at least 70 wt.% and in particular of at least 80 wt.%. It has furthermore proven preferable not to use the solvents in as equal amounts as possible, but to use one of the solvents in a clear excess over the other. Corresponding cosmetic products in which the weight ratio of the solvents to one another (the quotient LM1 / LM2) is >2, preferably >3, more preferably >4 and in particular >5 are preferred. It has been shown that the difference between the boiling points of the solvents LM1 and LM2 at 1013,25 mbar in the range from 5 to 50°C brings significant advantages when spraying the cosmetic preparation a) from the device b). The effects are particularly advantageous within a narrower temperature range. Here, cosmetic products according to the invention are preferred in which the difference between the boiling points of the solvents LM1 and LM2 at 1013.25 mbar is in the range from 10 to 40°C, preferably in the range from 12.5 to 37.5°C, more preferably in the range from 15 to 35°C, and in particular in the range from 17.5 to 30°C. In absolute terms, solvents with certain boiling points are particularly suitable for cosmetic applications. For sprayability from the device b), it is particularly preferred if the boiling point of the first solvent LM1 at 1013.25 mbar is 70 to 90°C, preferably 72.5 to 87.5°C, more preferably 75 to 85°C and in particular 77.5 to 82.5°C. From the above-mentioned preferred boiling point differences, it also follows thatthat it is particularly preferred if the boiling point of the second solvent LM2 at 1013.25 mbar is 90 to 110°C, preferably 92.5 to 107.5°C, more preferably 95 to 105°C, and in particular 97.5 to 102.5°C. The cosmetic preparation a) sprayed by means of the device b) in the product according to the invention can be optimized not only with regard to its physical properties and adapted to the device, but also and particularly with regard to its composition. For certain areas of application, such as hair treatments, hair conditioners, and other hair care compositions, it has been shown that emulsions are particularly suitable as cosmetic preparations in the product according to the invention. Oil-in-water emulsions (O / W emulsions) have proven particularly suitable here.since the physical properties can be particularly well adapted to the device b). Such emulsions preferably contain at least one emulsifier. In the context of the present invention, it has proven preferable if the cosmetic agent a) contains a non-ionic emulsifier. For the purposes of the present invention, non-ionic emulsifiers are understood to mean emulsifiers which do not have any charged groups. Charged groups include both permanently cationic and anionic groups as well as temporarily cationic and anionic groups. Permanently cationic and anionic groups have a cationic or anionic charge regardless of the pH value. In contrast, temporarily cationic and anionic groups only have a cationic or anionic charge at certain pH values. Preferred cosmetic agents a) are therefore characterized in that they contain at least one emulsifier,selected from the group of (i) addition products of 4 to 30 mol of ethylene oxide and / or 1 to 5 mol of propylene oxide with linear C8-C22 alcohols, with C12-C22 carboxylic acids and with C8-C15 alkylphenols, (ii) C12-C22 carboxylic acid mono- and diesters of addition products of 1 to 30 mol of ethylene oxide with C3-C6 polyols, (iii) ethylene oxide and polyglycerol addition products with methylglucoside carboxylic acid esters, carboxylic acid alkanolamides and carboxylic acid glucamides, C8-C22 alkyl mono- and oligoglycosides (iv) addition products of 5 to 60 mol of ethylene oxide with castor oil and hydrogenated castor oil, (v) partial esters of polyols with 3 to 6 Carbon atoms with saturated C8-C22 carboxylic acids (vi) sterols (sterols), (vii) carboxylic acid esters of sugars and sugar alcohols, and (viii) mixtures thereof,Advantageously, the at least one emulsifier is used in the cosmetic agents a) in specific quantity ranges. Preferred cosmetic agents a) are therefore characterized in that they contain - based on their total weight - 0.1 to 40 wt.%, preferably 0.3 to 35 wt.%, preferably 0.5 to 30 wt.%, in particular 1.0 to 20 wt.%, of at least one emulsifier. The use of the above-mentioned amounts ensures sufficient emulsification of the ingredients and thus enables a high storage stability of the cosmetic agents. Cosmetic agents a) in the form of an O / W emulsion contain at least one emulsified compound selected from the group of oils, waxes, esters or mixtures thereof. It has proven advantageous within the scope of the present invention if the cosmetic agents a) contain at least one cosmetic oil,preferably contain at least one cosmetic non-silicone oil and / or one vegetable oil. According to the invention, volatile non-silicone oils are understood to mean oils that do not contain silicon atoms and that, at 20°C and an ambient pressure of 1,013 hPa, have a vapor pressure of 2.66 Pa to 40,000 Pa (0.02 to 300 mm Hg), preferably of 10 to 12,000 Pa (0.1 to 90 mm Hg), more preferably of 13 to 3,000 Pa (0.1 to 23 mm Hg), in particular of 15 to 500 Pa (0.1 to 4 mm Hg). It is therefore preferred if the cosmetic agent a) contains at least one oil, wherein the oil is selected from the group of (i) volatile non-silicone oils, in particular liquid paraffin oils and isoparaffin oils, such as isodecane, isoundecane, isododecane, isotridecane, isotetradecane, isopentadecane, isohexadecane and isoeicosane; (ii) vegetable oils, in particular sunflower oil, olive oil, soybean oil, rapeseed oil, almond oil, jojoba oil, orange oil, wheat germ oil,Peach kernel oil and the liquid components of coconut oil; and (iii) mixtures thereof. The use of the aforementioned oils in the cosmetic products a) leads to a high care effect and conditioning of the skin and / or hair. Furthermore, it is preferred within the scope of the present invention if the cosmetic products a) contain at least one wax. Preferred cosmetic products a) are therefore characterized in that they contain at least one wax, wherein the wax is selected from the group of (i) coconut fatty acid glycerol mono-, di-, and triesters; (ii) Butyrospermum Parkii (Shea Butter); (iii) esters of saturated, monohydric C8-18 alcohols with saturated C12-18 monocarboxylic acids; (iv) linear, primary C12-C24 alkanols; (v) esters of a saturated monohydric C16-C60 alkanol and a saturated C8-C36 monocarboxylic acid, in particular cetyl behenate,Stearyl behenate and C20-C40 alkyl stearate; (vi) glycerol triesters of saturated linear C12-C30 carboxylic acids, which may be hydroxylated, in particular hydrogenated palm oil, hydrogenated coconut oil, hydrogenated castor oil, glyceryl tribehenate and glyceryl tri-12-hydroxystearate; (vii) natural vegetable waxes, in particular candelilla wax, carnauba wax, Japan wax, sugar cane wax, ouricoury wax, cork wax, sunflower wax, fruit waxes; (viii) animal waxes, in particular beeswax, shellac wax and spermaceti; (ix) synthetic waxes, in particular montan ester waxes, hydrogenated jojoba waxes and sasol waxes, polyalkylene waxes and polyethylene glycol waxes, C20-C40 dialkyl esters of dimer acids, C30-50 alkyl beeswax, and alkyl and alkylaryl esters of dimer fatty acids, paraffin waxes; and (x) mixtures thereof. Particularly preferred are commercial products with the INCI name Cocoglycerides, in particular the commercial products Novata ^ (ex BASF),Particularly preferred is Novata AB, a mixture of C12-18 mono-, di- and triglycerides which melts in the range of 30 to 32 °C, as well as the products of the Softisan series (Sasol Germany GmbH) with the INCI name Hydrogenated Cocoglycerides, in particular Softisan 100, 133, 134, 138, 142. Further preferred esters of saturated, monohydric C12-18 alcohols with saturated C12-18 monocarboxylic acids are stearyl laurate, cetearyl stearate (e.g. Crodamol CSS), cetyl palmitate (e.g. Cutina CP) and myristyl myristate (e.g. Cetiol MM). Furthermore, a C20-C40 alkyl stearate is preferably used as the wax component. This ester is known under the names Kesterwachs, ^ K82H or Kester wax ^K80H and is marketed by Koster Keunen Inc. Furthermore, it has proven advantageous within the scope of the present invention if the cosmetic agent a) contains at least one ester. It is therefore preferred according to the invention if the cosmetic agent contains at least one ester, wherein the ester is selected from the group of (i) triethyl citrates (ii) dicarboxylic acid esters of linear or branched C2-C10 alkanols, (iii) symmetrical, asymmetrical or cyclic esters of carbonic acid with alcohols, (iv) esters of dimers of unsaturated C12-C22 carboxylic acids with monovalent, linear, branched and cyclic C2-C18 alkanols or C2-C6 alkanols, (v) benzoic acid esters of linear or branched C8-C22 alkanols,such as C12-15 alkyl benzoates, isostearyl benzoates, and octyldodecyl benzoates; and (vi) mixtures thereof. The use of the aforementioned esters also leads to good care and conditioning of the skin and / or hair. Particularly preferred embodiments of the present invention contain at least one aforementioned oil and / or wax and / or one aforementioned ester. In summary, cosmetic products according to the invention are preferred in which the cosmetic preparation a) is an oil-in-water (O / W) emulsion which, based on its weight, contains 1 to 25% by weight of cosmetic oil(s). In addition to the components already described above, the cosmetic agents a) can in principle use all other components known to the person skilled in the art for such cosmetic compositions. Other active ingredients, auxiliaries, and additives are, for example: - Thickeners such as gelatin or plant gums, for example agar-agar, guar gum,Alginates, xanthan gum, gum arabic, karaya gum, locust bean gum, linseed gums, dextrans, cellulose derivatives such as methylcellulose, hydroxyalkylcellulose and carboxymethylcellulose, starch fractions and derivatives such as amylose, amylopectin and dextrins, fully synthetic hydrocolloids such as. B. Polyvinyl alcohol, - Structuring agents such as maleic acid and lactic acid, - Solvents and mediators such as ethanol, isopropanol, ethylene glycol, propylene glycol, glycerol and diethylene glycol, - Fiber structure-improving agents, in particular mono-, di- and oligosaccharides such as glucose, galactose, fructose, fructose and lactose, - Dyes for coloring the product, - Substances for adjusting the pH value, such as 1- and 2-hydroxycarboxylic acids, - Active ingredients such as allantoin and bisabolol, - Complexing agents such as EDTA, NTA, 1-alanine diacetic acid and phosphonic acids,- Ceramides. Ceramides are understood to mean N-acylsphingosine (fatty acid amides of sphingosine) or synthetic analogues of such lipids (so-called pseudo-ceramides), - opacifiers such as latex, styrene / PVP and styrene / acrylamide copolymers, - pearlescent agents such as ethylene glycol mono- and distearate and PEG-3 distearate, - pigments, - viscosity regulators such as salts (NaCl), - anionic, cationic and amphoteric surfactants, - cationic, non-ionic and amphoteric polymers, - vitamins, particularly from groups A, B, C, E, F and H, - UV filters, particularly benzophenones, p-aminobenzoic acid esters, diphenylacrylic acid esters, cinnamic acid esters, salicylic acid esters, benzimidazoles and o-aminobenzoic acid esters, - protein hydrolysates and cationized protein hydrolysates, - humectants or Penetration aids and / or swelling agents, in particular urea and urea derivatives, guanidine and its derivatives, arginine and its derivatives, water glass, imidazole and its derivatives,Histidine and its derivatives, benzyl alcohol, glycol ethers, propylene glycol ethers, for example propylene glycol monoethyl ether, carbonates, hydrogen carbonates, 1,2-diols and 1,3-diols, - plant extracts, for example from green tea, white tea, oak bark, stinging nettle, witch hazel, hops, chamomile, burdock root, horsetail, hawthorn, linden blossom, lychee, almond, aloe vera, spruce needles, horse chestnut, sandalwood, juniper, coconut, mango, apricot, lemon, wheat, kiwi, melon, orange, grapefruit, sage, rosemary, birch, mallow, meadowfoam, wild thyme, yarrow, thyme, lemon balm, restharrow, coltsfoot, marshmallow, ginseng, ginger root, Echinacea purpurea, Olea europea, Foeniculum vulgaris and Apim graveolens, - silicone oils, in particular polyalkylsiloxanes, polyarylsiloxanes and polyalkylarylsiloxanes,which may optionally be functionalized with organic groups and / or ethoxy and / or propoxy groups. The aforementioned further ingredients can be present – ​​based on the total weight of the cosmetic agent – ​​in a total amount of 0.001 to 50 wt.%, preferably 0.01 to 40 wt.%, preferably 0.1 to 30 wt.%, in particular 0.5 to 20 wt.%. The cosmetic product according to the invention comprises a device for the finely distributed application of the cosmetic preparation a). This device in turn comprises b1) a storage container for the cosmetic preparation a), b2) a pump or a similarly acting conveying element to convey the cosmetic preparation a) out of the storage container b1); b3) a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to a pressure increase, comprising b3a) an inlet valve or a similarly acting closing element,in order to be able to seal the cosmetic preparation a) conveyed by means of the conveying element b2) from the storage container b1) into the pressure chamber b3) in an environmentally sealed manner; b3b) an outlet valve or a similarly acting closing element in order to be able to apply the pressurized cosmetic preparation a) from the pressure chamber b3) in a finely distributed manner. The storage container b1) serves as a storage container for the cosmetic composition a). It can be permanently connected to the device, but a detachable and replaceable design is preferred, which makes it possible to connect different storage containers to one device and thus also spray different cosmetic preparations. The volume of the storage container b1) is ideally adapted to the intended use and depends on the amount of cosmetic preparation to be applied and the desired number of applications.which a once-filled storage container should enable. Typical volumes for storage containers range from 1 to 500 ml, preferably from 2 to 250 ml, and in particular from 5 to 500 ml. The device of the product according to the invention further comprises a pump b2) or a similarly acting conveying element to convey the cosmetic preparation a) out of the storage container b1). The conveying element b2) can be located directly in the storage container b1) or connected to it via suitable lines, for example, riser pipes. There are no limits to the technical and optical design of the (preferably replaceable) storage container b1) and conveying element b2). If a pump is used as the conveying element, both flow and positive displacement pumps can be used. In flow pumps such as axial, diagonal, and radial pumps, the energy transfer is achieved through fluid-mechanical processes.With positive displacement pumps, the medium is conveyed through self-contained volumes. Diaphragm pumps, rotary piston pumps such as rotary lobe, rotary vane, rotary piston, and gear pumps, eccentric screw pumps, impeller pumps, chain pumps, piston pumps, peristaltic pumps, and screw pumps are particularly suitable. The device of the product according to the invention further comprises a pressure chamber b3), in which the cosmetic preparation a) conveyed from the storage container b1) can be subjected to a pressure increase. To enable the repeated conveyance of cosmetic preparation a) from the storage container b1) through the conveying element b2) and the subsequent spraying, the pressure chamber b3) comprises an inlet valve b3a) or a similarly acting closing element.in order to be able to seal the cosmetic preparation a) conveyed by means of the conveying element b2) from the storage container b1) into the pressure chamber b3) in an environmentally sealed manner, and an outlet valve b3b) or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely distributed manner. The closing elements b3a) and b3b) are preferably controllable valves in which a closure part (for example a plate, a cone, a ball or a needle) is moved approximately parallel to the flow direction of the fluid. The flow is interrupted by the closure part being pressed with the sealing surface against a suitable opening, the so-called sealing seat.pressed. With regard to the desired automatic application of the cosmetic preparation a), electromotively or electromagnetically operated valves with short closing and opening times are preferred. According to the present invention, a device for spraying a cosmetic preparation is provided which allows the temperature and / or pressure of the cosmetic to be increased when the inlet valve b3a) and the outlet valve b3b) are closed, causing at least a portion of the cosmetic preparation a) to change state in the chamber. The cosmetic composition a) conveyed into the pressure chamber b3) by the conveying element b2) can be a liquid or a mixture of liquid and gas, such as a foam, with liquids being preferred. The cosmetic preparation a) can also contain dispersed, particulate solids. The pressure chamber b3) comprises an inlet valve b3a) and an outlet valve b3b).which are preferably provided at separate, different locations in the pressure chamber. When the temperature and pressure in the chamber increase, a liquid cosmetic composition a) in the chamber partially changes its state to a gas that is partially dispersed in the liquid, also forming a foam. Preferably, the inlet valve b3a) and the outlet valve b3b) each comprise an actuator and a seat. The actuator can control the opening and closing of the valve. The actuator can be a solenoid. The valve seat can provide a sealing surface, thereby enabling the valve to close and the chamber to be pressurized. The cosmetic composition a) is fed from the reservoir b1) to the pressure chamber b3), where it is pressurized. The pressure increase can be achieved in any way known to those skilled in the art, for example by pressurizing it with a compressed gas,by reducing the volume of the pressure chamber, by means of shock waves, or by heating, the latter being preferred due to its simple apparatus implementation. The pressure chamber b3) is formed from a material that can withstand considerable temperature changes and pressure differences. It may have a generally cylindrical shape. The pressure chamber b3) may be formed from a metal such as steel, copper or aluminum, or a polymer. Alternatively, the pressure chamber b3) may be formed from a composite material wrapped around a metal lining in the form of a wrapped composite pressure vessel. The pressure chamber b3) may be covered with another metal,Ceramic or polymer lined. The size and shape of the pressure chamber b3) can vary depending on the desired application. The pressure chamber b3) can further comprise devices for directing and controlling the fluid flow of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b). Such devices are arranged within the chamber and direct the cosmetic composition such that it preferably follows a non-linear path. The means for directing and controlling the fluid flow of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) along a preferably non-linear path can initiate and assist foam formation within the chamber and help ensure that foam is present within the chamber at the outlet valve b3b).which results in improved sprayability and a more homogeneous spray pattern. The inclusion of a means for directing and controlling the fluid flow of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) along a preferably non-linear path within the chamber creates an obstacle within the chamber, preventing the liquid from moving freely through the chamber when the pressure chamber b3) or the device b) is moved. With regard to cosmetic applications in which the position of the device b) and the ejection direction of the outlet valve b3b) continuously change during application (e.g., when applying a hairspray to the user's head), an obstacle slows down the fluid of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b), so that there is less momentum or impact on the foam.and the foam is largely protected from destruction regardless of the movement of the pressure chamber b3). The direction of the fluid of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) along a preferably non-linear path thus ensures that no pool of liquid accumulates in front of the outlet valve b3b), thus enabling efficient and effective operation of the device b). According to the invention, it is desirable to have a high foam concentration near the outlet valve b3b) of the pressure chamber b3), since it has been found that when foam rather than liquid is ejected from the outlet valve b3b), the droplet size of the resulting spray is smaller. This leads to further breakup of the foam,when the fluid is expelled through the outlet valve b3b) by a steam explosion. These device measures ensure that the properties of the spray ejected from the outlet valve b3b) remain largely unaffected, even if the device b) is moved or its orientation is changed. This improves the reproducibility of the spray properties achieved under a given set of conditions, which in turn also improves the reliability of the device b) for any given application. Before pressurizing the cosmetic composition a) in the pressure chamber b3) (preferably heating), the inlet b3a) and outlet valves b3b) are closed.to prevent the leakage of cosmetic preparation a). The pressure increase (preferably heating) of the cosmetic composition a) in the pressure chamber b3) causes an increase in the pressure within the chamber and thus also a reduction in the boiling point of the cosmetic composition a). In most cases in which the cosmetic composition a) foams in the pressure chamber b3) under pressure (preferably heating), the saturation or boiling point of the fluid from cosmetic composition a) is based on the boiling point of the liquid phase. The cosmetic composition a) is heated to a temperature well above the boiling point at atmospheric pressure, which causes the cosmetic composition a) to change its state. The temperature within the pressure chamber b3) can be monitored by one or more temperature sensors. A means for heating the cosmetic preparation a) can be a heating element,which is located in or near the chamber to heat the cosmetic preparation a). The heating means can, for example, be a heated jacket that surrounds or partially surrounds the pressure chamber b3). Alternatively, the heating means can be generated by chemical components. For example, two chemicals can be combined that, when mixed, enter into an exothermic reaction, whereby the generated heat is sufficient to heat the cosmetic preparation a) to a temperature that exceeds the saturation temperature of the liquid. The sudden pressure release when the cosmetic preparation a) exits the outlet valve b3b) causes a steam explosion due to the rapid expansion of liquid, foam, and / or steam. The steam explosion causes the material to be transported very quickly and over greater distances from the pressure chamber b3).than would otherwise be possible. A mixture of steam and fine spray is ejected from the outlet valve b3b), which can spread at high velocities and over considerable distances. For example, the throw distance of a liquid and steam explosion according to embodiments of the present invention can be approximately 200 to 300 times or more the corresponding length of the pressure chamber. This is due to the high fluid pressures maintained in the pressure chamber b3) as well as the dynamics of the fluid within the chamber. An advantage of the device b) is that it can continuously deliver steam bursts in very rapid succession. The control of the inlet b3a) and outlet valve b3b) can be programmed so that the outlet valve b3b) opens every few milliseconds. The temperature at which the outlet valve b3b) is allowed to opencan be referred to as the trigger temperature. The trigger temperature can be set above the boiling point of the liquid or liquids in the chamber to ensure maximum explosion of the liquid from the chamber. The trigger temperature can be set in the range of 10°C to 200°C above the boiling point of the liquid. Preferably, the trigger temperature is set in the range of 20°C to 90°C above the boiling point of the liquid. The necessary trigger temperature is relative to the ambient pressure of the environment into which the ejected spray is injected, i.e., the environment outside the chamber at the outlet opening. If the ambient pressure is high, the temperature and pressure in the chamber must be increased, and the trigger temperature value is at the upper end of the scale. The liquid to vapor ratio can be changed if higher trigger temperatures are selected. This can increase the liquid phase, if desired.completely eliminate. In this way, the ratio of liquid to vapor can be controlled by varying one or more parameters associated with the chamber. It has been found that the droplet size is large if the trigger temperature is not at least 10°C higher than the boiling temperature of the liquid. Alternatively, instead of monitoring the temperature, the pressure within the chamber can be monitored, and the outlet valve b3b) can be opened when a predetermined pressure value is reached. Selectively varying one or more parameters such as temperature, pressure, or viscosity of the cosmetic composition a) can be used to selectively control the droplet size achieved in the resulting spray. The size of the outlet opening can vary depending on the desired spray characteristics. The outlet opening from the pressure chamber b3) can be connected to a nozzle,to change the dispersion properties of the spray. The nozzle can be used to create a spray with a wider scattering field or a narrower, more concentrated spray. A nozzle can also be used to further reduce the droplet size of the liquid in the spray, so that a finer spray is created. The preferably non-linear path along which the cosmetic preparation a) is guided within the pressure chamber b3) can cause a change in the direction in which the cosmetic preparation b) moves by at least 90°. The required degrees of change depend on the application or end use of the device b). The non-linear path could cause a change in the direction in which the cosmetic preparation a) moves by at least 180°, 270°, or 360°. Depending on the application, it may be necessary to increase the degrees of change,to protect the foam layer within the chamber from the movement of the fluid. For applications where the device b) may be subjected to greater degrees of movement, it is preferable to direct the cosmetic preparation a) along a more complex or tortuous path so that there is a change of at least 180°. The aim of a non-linear path is to prevent liquid from moving rapidly in a wave motion within the pressure chamber b3). The more the liquid flow is interrupted, the less kinetic energy the liquid has when it comes into contact with the foam, which in turn results in a larger portion of the foam being retained. For example, if the pressure chamber b3) is subjected to a rocking motion along a single axis, it would be sufficientif the nonlinear path directs the fluid through a change of at least 90°. For example, a baffle or barrier within the chamber could change the direction of fluid movement by 90° to bypass the baffle. If the pressure chamber b3) is in practice only subject to a rocking motion, the baffle can be arranged so that liquid is retained on one side of the barrier, where only foam or gas easily flows over the baffle. This depends on the relative height and arrangement of such a baffle. The baffle would have to cause a change in the direction of the fluid of at least 90° to achieve the desired effect. By arranging the baffle in this way, it can be prevented that the cosmetic preparation a) on the first side of the baffle destroys or breaks up any foam present on the second side of the baffle, despite the movement of the chamber. For applications,where the chamber is subjected to greater degrees of movement, possibly along more than one axis, it will be necessary to have greater degrees of change in the direction of the nonlinear path to prevent foam destruction. For some applications, a change of at least 180° is required, and for others, a change of at least 360° is necessary. A preferably nonlinear path within the pressure chamber b3) may comprise at least one nonlinear channel and may comprise multiple nonlinear channels. Generally, a single channel is preferable when the cosmetic preparation a) is viscous. The means for directing and controlling the fluid flow from the inlet opening to the outlet opening may comprise at least one channel with a series of bends that cause the fluid to change direction several times. The fluid may be directed along a tortuous path,which includes many bends at different angles. The means for directing and controlling the fluid flow of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) may comprise at least one spiral or helical channel. Due to the channel, the fluid can be guided along an oscillating or twisting path. The means for directing and controlling the fluid flow of cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) along a non-linear path could comprise at least one baffle arranged to cause the fluid to change direction. Optionally, it could comprise a series of deflection vanes arranged to cause the fluid to change direction several times. The deflection vanes are preferably arranged within the pressure chamber b3) to prevent the fluid from following a linear path between the inlet valve b3a) and the outlet valve b3b). As already mentioned,The pressure increase in the pressure chamber b3) is preferably achieved by heating. At least one means for heating the cosmetic preparation a) can be located outside the pressure chamber b3). The heating means can, for example, be a heated jacket that surrounds or partially surrounds the chamber. This could be used alone or in conjunction with other heating means, such as a heating means located inside the chamber. At least one means for heating the fluid can be located inside the pressure chamber b3). For example, a spiral channel can be formed around a central cylindrical heating element. As a further option, at least one means for heating the fluid can be located inside the chamber, and the means for directing and controlling the fluid flow from the inlet opening to the outlet opening along a non-linear path can be positioned inside the heating means.where the fluid flow is fluidly isolated from the heating means. For example, a heating coil may be configured to adjoin the inner walls of the chamber, and this heating coil may be filled with a shaped element that ensures that the fluid flow is guided along a non-linear path from the inlet valve b3a) to the outlet valve b3b). The device b) preferably comprises at least one controller connected to the inlet valve b3a) and outlet valve b3b) so that the opening and closing of the inlet valve b3a) and outlet valve b3b) is electronically controlled. The controller may be programmed to close the outlet valve b3b) when the closing pressure or a set temperature is reached and to reopen the inlet valve b3a).to introduce new fluid into the chamber. The system can alternate between introducing new fluid into the chamber and expelling it from the outlet port. Alternatively, the valve control can be offset so that the pressure chamber b3) is filled with fluid and the outlet valve b3b) then makes a series of short, rapid openings until the pressure chamber b3) is emptied. The control can be programmed to open and close the valves b3a) and b3b) according to a timed sequence, with the valves being opened and closed for a predetermined time, provided that a predetermined (or set) pressure or temperature within the pressure chamber b3) has been reached or exceeded. The predetermined temperature could correspond to the saturation temperature of the fluid within the chamber at atmospheric pressure. The temperature can be monitored by one or more temperature sensors.which may be mounted within the chamber or near the chamber, for example, in the inlet stream, or on a wall of the chamber. The device may also comprise at least one pressure sensor within the chamber. This may be a pressure transducer. When fluid is expelled from the pressure chamber b3), the pressure within the chamber drops. The outlet valve b3b) may be arranged to close when the pressure has dropped back to an ambient or second predetermined pressure, which may be referred to as the closing pressure. Alternatively, the outlet valve b3b) may be arranged to close after a preselected period of time has elapsed. It is possible to provide a return loop from the pressure chamber b3) to the reservoir b1). The return loop would be designed so that some of the fluid can return from the pressure chamber b3) to the reservoir b1) when the inlet valve b3a) is open.to refill the cosmetic agent a) in the pressure chamber b3). The return line allows some liquid to flow from the pressure chamber b3) back to the storage container b1). Fresh cosmetic preparation a) from the storage container b1) is fed to the pressure chamber b3) via the inlet valve b3a) by means of the conveying element b2). The returned cosmetic preparation a) is warmer than the cosmetic preparation a) in the storage container b1), so that the return helps to increase the temperature of the cosmetic preparation a) in the storage container b1). This, in turn, can accelerate the heating of the cosmetic preparation a) in the pressure chamber b3). Also provided is a method for spraying a cosmetic preparation, in which a cosmetic preparation a) is sprayed by means of a device for the finely distributed application of the cosmetic preparation a) from a storage container b1) by means of a pump or a similarly acting conveying element,in order to convey the cosmetic preparation a) out of the storage container b1); conveyed out and transferred into a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to a pressure increase, wherein the pressure chamber b3) comprises an inlet valve or a similarly acting closing element in order to be able to seal the cosmetic preparation a) conveyed by means of conveying element b2) from the storage container b1) into the pressure chamber b3) in an environmentally tight manner; and furthermore an outlet valve or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely distributed manner, wherein the cosmetic preparation a) at 25°C has a thermal conductivity of 0.02 to 2.0 Wm, -1 K -1 The above description of the device also applies, mutatis mutandis, to the spraying method.

Claims

Patent claims:

1. Cosmetic product, comprising a) a cosmetic preparation, b) a device for the finely distributed application of the cosmetic preparation a), comprising b1) a storage container for the cosmetic preparation a), b2) a pump or a similarly acting conveying element in order to convey the cosmetic preparation a) out of the storage container b1); b3) a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to an increase in pressure, comprising b3a) an inlet valve or a similarly acting closing element in order to be able to seal the cosmetic preparation conveyed by means of the conveying element b2) from the storage container b1) into the pressure chamber b3) a) in an environmentally tight manner;b3b) an outlet valve or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely distributed manner, characterized in that the cosmetic preparation a) at 25°C has a thermal conductivity of 0.02 to 2.0 Wm; -1 K -12. A method for spraying a cosmetic preparation, in which a) a cosmetic preparation is sprayed by means of b) a device for the finely distributed application of the cosmetic preparation a), comprising b1) a storage container for the cosmetic preparation a), b2) a pump or a similarly acting conveying element in order to convey the cosmetic preparation a) out of the storage container b1); b3) a pressure chamber in which the cosmetic preparation conveyed out of the storage container b1) a) can be subjected to an increase in pressure, comprising b3a) an inlet valve or a similarly acting closing element in order to be able to seal the cosmetic preparation conveyed by means of the conveying element b2) from the storage container b1) into the pressure chamber b3) a) in an environmentally tight manner;b3b) an outlet valve or a similarly acting closing element in order to be able to apply the pressurised cosmetic preparation a) from the pressure chamber b3) in a finely dispersed manner, wherein the cosmetic preparation a) has a thermal conductivity of 0.02 to 2.0 Wm at 25°C; -1 K -1 3. Cosmetic product according to claim 1 or method according to claim 2, characterized in that the cosmetic preparation a) at 25°C has a thermal conductivity of 0.05 to 1.5 Wm -1 K -1 , preferably from 0.1 to 1.0 Wm -1 K -1 and especially from 0.2 to 0.6 Wm -1 K -1 owns.

4. Cosmetic product according to one of claims 1 or 3 or method according to one of claims 2 or 3, characterized in that the cosmetic preparation a) at 20°C a specific heat capacity of 1.6 to 5.2 Jg -1 K -15. Cosmetic product according to one of claims 1 or 3 to 4 or method according to one of claims 2 to 4, characterized in that the cosmetic preparation a) has a thermal expansion coefficient ^ (20°C) of 0.0001 to 0.005 K -16. Cosmetic product according to one of claims 1 or 3 to 5 or process according to one of claims 2 to 5, characterized in that the cosmetic preparation a) at 20°C has a vapor pressure (according to the Grain-Watson model) of 1200 to 8000 Pa.

7. Cosmetic product according to one of claims 1 or 3 to 6 or process according to one of claims 2 to 6, characterized in that the cosmetic preparation a) at 20°C has a viscosity (Brookfield DV 2 T, 20 rpm, spindle 5) of 500 to 25000 mPas.

8. Cosmetic product according to one of claims 1 or 3 to 6 or process according to one of claims 2 to 6, characterized in that the cosmetic preparation a) has a viscosity (Brookfield DV 2 T, spindle 2, 10 rpm) of 10 to 100 mPas at 20°C 9.Cosmetic product according to one of claims 1 or 3 to 8 or method according to one of claims 2 to 8, characterized in that the cosmetic preparation a) is an oil-in-water (O / W) emulsion which, based on its weight, contains 1 to 25 wt.% cosmetic oil(s).

10. Cosmetic product according to one of claims 1 or 3 to 9 or method according to one of claims 2 to 9, characterized in that the cosmetic preparation a) contains at least 5 wt.% of a first solvent LM1 which is liquid at 20°C and at least 5 wt.% of at least one second solvent LM2 which is liquid at 20°C, the difference between the boiling points of the solvents LM1 and LM2 at 1013.25 mbar being in the range from 5 to 50°C.