Cosmetic products for spray application

Abstract

With regard to cosmetic products for spray application, these products offer advantages in terms of versatility (option to spray different formulations with one device), resource consumption, the most uniform application possible, high efficacy combined with the use of small amounts, including: a) cosmetic preparations, b) a device for applying a finely dispersed cosmetic preparation a), b1) storage containers for cosmetic preparations a); b2) a pump or similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly operating closure element for enabling the cosmetic preparation a) conveyed by the conveying element b2) from the storage container b1) to the pressure chamber b3) to be sealed against the environment; b3b) an outlet valve or a similarly operating closure element for enabling the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including: A cosmetic product for spray application comprising: Cosmetic preparation a) has a viscosity of 0.02 to 2.0 Wm at 25°C. -1 K -1 A cosmetic product having a thermal conductivity of

Description

[Technical Field]

[0001] The present invention relates to a spray application device and a cosmetic product containing a sprayed cosmetic formulation. [Background technology]

[0002] Spray application of cosmetic compositions is a well-established technical knowledge. Such products are widely available commercially in the cosmetics sector as well as in many other fields. The majority of such products are based on a non-reusable pressurized container containing one or more propellants and the cosmetic formulation to be sprayed. By operating a valve, the propellant expands from the pressure container and sprays the cosmetic formulation through a suitable nozzle.

[0003] An alternative solution is pump-type spray devices, which can be refilled as needed, reducing the amount of packaging used. However, in addition to potentially improving sustainability, both solutions have the potential to improve spray pattern and versatility, allowing, for example, spraying a variety of cosmetic formulations (deodorants, hairspray, etc.).

[0004] Novel approaches to spraying are disclosed in EP 3229752, EP 3229917, and EP 322991. According to the teachings of these documents, a cosmetic composition is sprayed by an apparatus for flash evaporation, which includes a container defining a closed interior capable of containing a cosmetic formulation, a valve or similarly operating closure element for opening and closing the interior of the container at least partially filled with the cosmetic formulation, a heating device for heating the cosmetic formulation under pressure within the closed interior of the container and for releasing the heated cosmetic formulation under reduced pressure from the interior of the container into the environment, and a nozzle that enables atomization of the cosmetic formulation released from the container. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent Application Publication No. 3229752 [Patent Document 2] European Patent Application Publication No. 3229917 [Patent Document 3] European Patent Application Publication No. 322991 Summary of the Invention [Problem to be solved by the invention]

[0006] The aim of the present invention was to advance the field of cosmetic products for spray application, with particular emphasis on versatility (ability to spray different formulations with one device), resource consumption, the most uniform application possible and high effectiveness with low application volumes.

[0007] It has now been found that devices containing special cosmetic formulations whose physical properties are tailored to the device solve this problem.

[0008] In a first embodiment, the present invention provides a) cosmetic preparations, b) a device for applying a finely dispersed cosmetic preparation a), b1) storage containers for cosmetic preparations a); b2) a pump or similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly operating closure element for enabling the cosmetic preparation a) conveyed by the conveying element b2) from the storage container b1) to said pressure chamber b3) to be sealed against the environment; b3b) an outlet valve or a similarly operating closure element for enabling the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including: A cosmetic product comprising: Cosmetic preparation a) has a viscosity of 0.02 to 2.0 Wm at 25°C. -1 K -1The present invention relates to a cosmetic product having a thermal conductivity of 100% or more.

[0009] The present invention also provides a) a cosmetic preparation, b) a device for applying a finely dispersed cosmetic preparation a), b1) storage containers for cosmetic preparations a); b2) a pump or similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly operating closure element for enabling the cosmetic preparation a) conveyed by the conveying element b2) from the storage container b1) to the pressure chamber b3) to be sealed against the environment; b3b) an outlet valve or a similarly operating closure element for enabling the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including: A method for spraying a cosmetic preparation by spraying the cosmetic preparation by Cosmetic preparation a) has a viscosity of 0.02 to 2.0 Wm at 25°C. -1 K -1 The present invention also relates to a method for producing a thermally conductive film having a thermal conductivity of 0.1 to 1.0 MPa. DETAILED DESCRIPTION OF THE INVENTION

[0010] The cosmetic product and the method for spraying the formulation are described in more detail below. The cosmetic formulation a) and the device b) are disclosed in more detail, and although for linguistic reasons only the "cosmetic product" is sometimes mentioned, the method of the invention is always disclosed in more detail. "The product of the invention comprises" always means "The product of the invention comprises and is used in the method of the invention."

[0011] The product of the present invention comprises a cosmetic formulation that is optimized for sprayability, whereby its thermal conductivity is between 0.02 and 2.0 Wm at 25°C. -1 K -1 is.

[0012] Thermal conductivity (sometimes called k-value or thermal conductivity coefficient) is a material property that determines the flow of heat through a material as a result of thermal conduction. Thermal conductivity indicates how well a material conducts heat.

[0013] The thermal conductivity of most materials increases slightly with increasing temperature. Phase transitions and transitions between condensed states (e.g., solid ⇔ liquid ⇔ gas) usually result in significant and abrupt changes in conductivity.

[0014] The cosmetic composition has a thermal conductivity of at least 0.02 Wm -1 K -1 and the value is 2.0 Wm -1 K -1 It has been shown that the device in the product of the present invention can spray the cosmetic formulation a) in a particularly uniform manner so as to be finely dispersed if the viscosity does not exceed 0.05 to 1.5 Wm at 25°C. Within these limits, narrow ranges of values ​​are particularly preferred, and therefore preferred cosmetic products or methods are those in which the cosmetic formulation a) has a viscosity of 0.05 to 1.5 Wm at 25°C. -1 K -1 , preferably 0.1 to 1.0 Wm -1 K -1 , especially 0.2~0.6Wm -1 K -1 It is characterized by having a thermal conductivity of

[0015] 0.02~2.0Wm -1 K -1 Within this range, and particularly within the narrow ranges mentioned above, the cosmetic composition can be effectively heated and sprayed without tending to clog the valve or form an uneven spray mist. -1 K -1 At thermal conductivity below 2.0Wm, the spray pattern is uneven and the spray loss is large. -1 K -1 At high thermal conductivities above 1000 psi, the width and uniformity of the spray jet are unacceptable for cosmetic applications.

[0016] The thermal conductivity of a cosmetic composition can be adjusted by adjusting the type and amount of its constituents. The relationship between thermal conductivity and the content of a substance is not linear, even for a two-component mixture (e.g., water and ethanol). For multi-component mixtures, the thermal conductivity can be adjusted within the range of the present invention by adding or omitting, increasing or decreasing the amount of a specific constituent.

[0017] The product of the present invention has a cosmetic formulation a) of 1.6 to 5.2 Jg at 20°C. -1 K -1 It can be further optimized for its applicability by having a specific heat capacity of .gtoreq.

[0018] The specific heat capacity of a substance in a given state is the amount of heat that can be added to or removed from a quantity of that substance divided by the corresponding increase or decrease in temperature of the substance and the mass of the substance:

number

[0019] For the cosmetic composition a) in the product of the present invention, the specific heat capacity can be calculated as the quotient of the heat capacity and the mass m of the object. Since the heat capacity is an extensive state function, i.e., for an object composed of parts, it can be calculated as the sum of the heat capacities of the parts. If the heat capacities of the individual components are known, the specific heat capacity of the cosmetic formulation a) can also be calculated.

[0020] The cosmetic composition has a specific heat capacity at 20°C of at least 1.6 Jg -1 K -1 and the value is 5.2 Jg -1 K -1 It has been found that the device in the product of the present invention can be used to spray particularly uniformly and finely dispersedly if the amount of the solubility ... -1 K -1 , preferably 2.6 to 4.6 Jg -1 K -1 , especially 3.1~4.3Jg -1 K-1 It is characterized by having a specific heat capacity of

[0021] As already mentioned, the specific heat capacity is a temperature-dependent variable. It has been shown that the specific heat capacity of the cosmetic composition a) within a certain range at high temperatures is particularly advantageous for the product of the present invention. Here, the cosmetic product of the present invention is characterized in that the specific heat capacity of the cosmetic formulation a) is between 2.4 and 5.4 Jg at 50°C. -1 K -1 , preferably 3.0 to 5.0 Jg -1 K -1 , especially 3.5~4.2Jg -1 K -1 It is preferable that the specific heat capacity of the material is 100% or more.

[0022] 1.6~5.2Jg -1 K -1 Within this range, particularly within the narrow ranges noted above, the cosmetic composition can be effectively heated and sprayed without tending to clog the valve or form an uneven spray mist. -1 K -1 At specific heat capacities below 5.2 Jg, the spray pattern is uneven and spray loss is large. -1 K -1 At high specific heat capacities above 1000 kJ / cm, the width and uniformity of the spray jet are unacceptable for cosmetic applications.

[0023] The specific heat capacity of a cosmetic composition can be adjusted by adjusting the type and amount of its constituent substances, and in the case of a multi-component mixture, the specific heat capacity can be adjusted within the range of the present invention by adding or omitting, or increasing or decreasing, specific constituent substances.

[0024] Furthermore, the cosmetic composition has a coefficient of thermal expansion of 0.0001 to 0.005K (20°C). -1 It has been found that the device in the product of the present invention can be used to spray particularly uniformly and finely distributed.

[0025] The volumetric thermal expansion coefficient γ is a characteristic value that describes the dimensional behavior of a substance or mixture of substances when the temperature changes. This is due to thermal expansion. Since thermal expansion depends on the material used, it is a material constant specific to the substance. Since the thermal expansion of many materials does not occur uniformly over the entire temperature range, the volumetric expansion coefficient itself is temperature dependent and is therefore given for a specific reference temperature or temperature range.

[0026] For the products of the present invention, the coefficient of volumetric thermal expansion γ describes the change in volume of the cosmetic formulation a) when the temperature increases.

[0027] The cosmetic composition has a coefficient of thermal expansion of at least 0.0001 K (20°C). -1 and 0.005K -1 It has been found that the device in the product of the present invention can be used to spray particularly uniformly and finely dispersedly if the amount of the spray does not exceed 0.00012 to 0.002K. Within these limits, narrow ranges of values ​​are particularly preferred, and therefore preferred cosmetic products or methods are those in which the cosmetic formulation a) is in the range of 0.00012 to 0.002K. -1 , preferably 0.00015 to 0.001K -1 , and particularly preferably 0.00017 to 0.00105K -1 , especially 0.0002~0.0011K -1 It is characterized by having a volumetric thermal expansion coefficient γ(20°C).

[0028] As already mentioned, the coefficient of thermal volume expansion γ is a temperature-dependent variable. It has been shown that the product of the present invention is particularly advantageous when the coefficient of thermal volume expansion γ of the cosmetic composition a) is within a specific range of values ​​at high temperatures. Here, the cosmetic product of the present invention is characterized in that the cosmetic formulation a) is in the range of 0.0001 to 0.0024 K. -1 , preferably 0.0002 to 0.002K -1 , and particularly preferably 0.0004 to 0.0016K -1 , especially 0.0006~0.0012K -1 Preferably, the material has a volume thermal expansion coefficient γ(50°C) of 1000 kJ / cm2 or less.

[0029] 0.0001~0.005K-1 Within this range, particularly within the narrow ranges noted above, the cosmetic composition can be effectively heated and sprayed without tending to clog the valve or form an uneven spray mist. -1 A high thermal expansion coefficient above 0.0001K will result in an uneven spray pattern and increased spray loss. -1 At a thermal expansion coefficient less than 1000 .mu.m, the width and uniformity of the spray jet are unacceptable for cosmetic applications.

[0030] The volumetric thermal expansion coefficient γ (20°C) or volumetric thermal expansion coefficient γ (50°C) of the cosmetic composition can be adjusted by adjusting the types and amounts of its constituent substances. In the case of a multi-component mixture, the volumetric thermal expansion coefficient γ can be adjusted within the range of the present invention by adding or omitting, or increasing or decreasing, specific constituent substances.

[0031] The product of the invention can be further optimized with regard to its applicability in that the cosmetic formulation a) has a vapor pressure of 1200 to 8000 Pa at 20° C. (according to the Grain-Watson model).

[0032] Vapor pressure describes the equilibrium between the solid or liquid and gas phases of a substance. Vapor pressure is a variable that is highly dependent on temperature. The temperature dependence is explained by the Clausius-Clapeyron equation, which relates vapor pressure to temperature.

number

[0033] The variable ΔH corresponds to the enthalpy of vaporization during the transition from the liquid to the gaseous state. The deviation of the gaseous substance under consideration from ideal gas behavior can be explained by the difference in compressibility between the two phases. This parameter has values ​​between 1.00 and 0.91

[61] .

[0034] The Watson-based, Grain-extended vapor pressure calculation model is applicable to solid and liquid organic chemicals:

number

[0035] For liquids, m=0.19, and for solids the following rules apply: When Tρ is greater than 0.6, m has a value of 0.36; when Tρ is less than 0.5, m = 1.19. When Tρ is between 0.5 and 0.6, m is 0.8. Alternatively, m can be inserted between 0.38 and 1.19. This is done using a modification by Sage & Sage, where m takes different values ​​depending on Tρ:

number

[0036] For solids, the same f function is used as for liquids. The Grain-Watson model is also applicable to solids, so fugacity corrections due to melting point are not necessary. Nevertheless, it must be determined whether the substance is a solid or a liquid at the temperature of the system.

[0037] Using the formulas mentioned above (and now also using commercially available computer programs), the vapor pressure of a cosmetic formulation a) can be calculated depending on its composition.

[0038] It has been found that a cosmetic composition can be sprayed particularly uniformly and finely by the device in the product of the invention if its vapor pressure (according to the Grain-Watson model) is at least 1200 Pa and does not exceed 8000 Pa. Within these limits, narrow value ranges are particularly preferred, and therefore preferred cosmetic products or methods are characterized in that the cosmetic formulation a) has a vapor pressure (according to the Grain-Watson model) of 1600 to 7000 Pa, preferably 1800 to 6000 Pa, in particular 2200 to 5600 Pa at 20°C.

[0039] Within the range of 1200 to 8000 Pa, and particularly within the narrower ranges mentioned above, cosmetic compositions can be effectively heated and sprayed without tending to clog valves or form an uneven spray mist. At low vapor pressures below 1200 Pa, the spray pattern is uneven and spray loss is significant. At high vapor pressures above 8000 Pa, the width and uniformity of the spray jet are unacceptable for cosmetic applications.

[0040] The vapor pressure of a cosmetic composition can be adjusted by adjusting the type and amount of its constituent substances, and in the case of a multi-component mixture, the vapor pressure can be adjusted within the range of the present invention by adding or omitting, or increasing or decreasing the amount of a particular constituent substance.

[0041] The product of the invention can be further optimized with regard to its applicability by adapting the viscosity of the cosmetic formulation a) to the device environment.

[0042] Viscosity is a measure of the internal flow resistance ("thickness") of the cosmetic formulation a). Viscosity is a temperature-dependent variable and is measured at 20°C within the context of the present invention. Since viscosity measurements of the same formulation at the same temperature also show a certain dependency on the equipment used, viscosity values ​​within the scope of the present invention are uniformly related to measurements made with a Brookfield DV2T viscometer (measured at 20°C as mentioned above), with the other equipment parameters (speed, spindle) adapted to the viscosity measured each time.

[0043] For certain applications, such as hairsprays and hair styling products, it has been shown to be advantageous to select a low viscosity. Such compositions can be sprayed particularly uniformly and finely using the device in the product of the present invention if their viscosity (Brookfield DV2T, spindle 2, 10 rpm) is at least 10 mPas and does not exceed 100 mPas at 20°C. Narrower value ranges within these limits are particularly preferred, and thus preferred cosmetic products or methods are characterized in that the cosmetic formulation a) has a viscosity (Brookfield DV2T, spindle 2, 10 rpm) of 20 to 60 mPas at 20°C.

[0044] Within the range of 10 to 100 mPas, and especially within the narrower ranges mentioned above, the cosmetic composition can be effectively heated and sprayed without tending to clog the valve or form an uneven spray mist.

[0045] There are other application forms (e.g., hair treatments, hair conditioners, or hair masks) in which high viscosity values ​​have proven advantageous. It has been found that such compositions can be sprayed particularly uniformly and finely using the device in the product of the present invention if their viscosity (Brookfield DV2T, spindle 5, 20 rpm) is 500 to 25,000 mPas at 20°C. Narrower value ranges within these limits are particularly preferred, and therefore preferred cosmetic products or methods are characterized in that the cosmetic formulation a) has a viscosity (Brookfield DV2T, spindle 5, 20 rpm) of 1,000 to 20,000 mPas, preferably 1,500 to 15,000 mPas, and in particular 2,000 to 10,000 mPas at 20°C.

[0046] The viscosity of a cosmetic composition can be adjusted by adjusting the types and amounts of its constituents, and in the case of a multi-component mixture, the viscosity can be adjusted within the range of the present invention by adding or omitting, increasing or decreasing the amount of a particular constituent.

[0047] The product of the present invention can be further optimized with regard to its applicability in that said cosmetic formulation a) comprises at least 5% by weight of a first solvent LM1 that is liquid at 20°C and at least 5% by weight of at least one second solvent LM2 that is liquid at 20°C, the difference in boiling points of solvents LM1 and LM2 at 1013.25 mbar being in the range of 5 to 50°C.

[0048] Thus, the product of the present invention comprises a mixture of at least two solvents, each of which the cosmetic formulation contains at least 5% by weight. A first solvent, LM1, which is liquid at 20°C, has a boiling point at 1013.25 mbar of a specific temperature, x, while a second solvent, LM2, which is liquid at 20°C, has a boiling point at 1013.25 mbar of a temperature ranging from (x + 5)°C to (x + 50)°C, or from (x - 50)°C to (x - 5)°C. The cosmetic formulation may, of course, also contain other solvents, such as LM3 and LM4, but in this case, the above-mentioned minimum amount of 5% by weight or the boiling point difference do not have to be met.

[0049] Irrespective of the fact that it is possible to use further solvents such as LM3, it is not preferred according to the invention to use them in large amounts or even in amounts exceeding the amounts of LM1 or LM2. It is preferred according to the invention that cosmetic formulation a) comprises at most 10% by weight, preferably at most 7.5% by weight, in particular at most 5% by weight, of solvents other than LM1 and LM2 that are liquid at 20°C.

[0050] The sprayability of the cosmetic formulation a) from the device b) is enhanced not only when the total amount of solvents LM1 and LM2 corresponds to a minimum of 10% by weight, but also when LM1 and / or LM2 are used in higher amounts.Preferred here is a cosmetic product according to the invention in which the cosmetic formulation a) comprises at least 10% by weight, preferably at least 25% by weight, more preferably at least 40% by weight, and in particular at least 50% by weight, of a first solvent LM1 that is liquid at 20°C.

[0051] A further preferred cosmetic product according to the invention is characterized in that the cosmetic formulation a) comprises at least 10% by weight, preferably at least 25% by weight, more preferably at least 30% by weight, in particular at least 35% by weight of a second solvent LM2 that is liquid at 20°C.

[0052] It is particularly preferred that the cosmetic preparation a) is composed of LM1 and LM2 in as large a proportion as possible. Here, it is preferred that the cosmetic product of the present invention comprises, based on its weight, at least 40% by weight, preferably at least 50% by weight, more preferably at least 60% by weight, even more preferably at least 70% by weight, and in particular at least 80% by weight of the total amount of solvents LM1 and LM2 (LM1+LM2).

[0053] It has also been shown that it is preferable to use one solvent in a significantly larger amount than the other, rather than using as equal amounts of the solvents as possible, and that the weight ratio of the solvents to each other (quotient LM1 / LM2) is >2, preferably >3, more preferably >4, and especially >5 for the relevant cosmetic products.

[0054] It has been found that a difference in the boiling points of solvents LM1 and LM2 in the range of 5 to 50°C at 1013.25 mbar provides a clear advantage when spraying cosmetic formulations a) from devices b) using the solvents. This effect is particularly advantageous over a narrow temperature range. In this regard, the cosmetic product of the present invention preferably has a difference in the boiling points of solvents LM1 and LM2 in the range of 10 to 40°C, preferably 12.5 to 37.5°C, more preferably 15 to 35°C, and particularly preferably 17.5 to 30°C at 1013.25 mbar.

[0055] In absolute terms, solvents with specific boiling points are particularly suitable for cosmetic applications. From the viewpoint of sprayability from the apparatus 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 especially 77.5 to 82.5°C.

[0056] The above preferred boiling point difference also means that the boiling point of the second solvent LM2 at 1013.25 mbar is particularly preferably 90 to 110°C, preferably 92.5 to 107.5°C, more preferably 95 to 105°C, and particularly preferably 97.5 to 102.5°C.

[0057] In the product of the invention, the cosmetic preparation a) sprayed by the device b) can be optimized and adapted to the device, not only with regard to its physical properties but also in particular with regard to its composition.

[0058] For certain application areas, such as hair masks, hair conditioners, and other hair care compositions, emulsions have proven particularly suitable as cosmetic formulations for the products of the invention. Oil-in-water emulsions (O / W emulsions) have proven particularly successful here, as their physical properties can be adapted particularly effectively to the device b).

[0059] Such emulsions preferably contain at least one emulsifier.

[0060] Within the context of the present invention, it is indicated that cosmetic formulation a) preferably comprises a nonionic emulsifier. According to the present invention, nonionic emulsifier is understood to mean an emulsifier that does not have charged groups. Charged groups are understood to mean 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 pH. In contrast, temporarily cationic and anionic groups only have a cationic or anionic charge at a specific pH value. Therefore, preferred cosmetic formulation a) comprises (i) 4 to 30 mol ethylene oxide and / or 1 to 5 mol propylene oxide and a linear C8-C 22 Alcohol, C 12 -C 22 Carboxylic acids and C8-C 15 (ii) C addition products of 1 to 30 moles of ethylene oxide with C3-C6 polyols 12 -C 22 Carboxylic acid mono- and diesters, (iii) addition products of ethylene oxide and polyglycerol to methyl glucoside carboxylic acid esters, carboxylic acid alkanolamides and carboxylic acid glucamides, C8-C 22Alkyl mono- and oligoglycosides, (iv) addition products of 5-60 moles of ethylene oxide with castor oil and hydrogenated castor oil, (v) polyols having 3-6 carbon atoms and saturated C8-C 22 The emulsion is characterized by containing at least one emulsifier selected from the group consisting of (i) partial esters of carboxylic acids, (ii) sterols, (iii) carboxylic acid esters of sugars and sugar alcohols, and (iv) mixtures thereof.

[0061] At least one emulsifier is advantageously used in a specific amount range in the cosmetic formulation a). Thus, a preferred cosmetic formulation a) is characterized by containing 0.1 to 40 wt. %, preferably 0.3 to 35 wt. %, more preferably 0.5 to 30 wt. %, and particularly preferably 1.0 to 20 wt. % of at least one emulsifier based on the total weight of the cosmetic formulation. Using the above amount ensures sufficient emulsification of the constituents, thereby improving the storage stability of the cosmetic formulation.

[0062] The cosmetic preparation a) in the form of an O / W emulsion comprises at least one emulsifying compound selected from the group of oils, waxes, esters or mixtures thereof.

[0063] Within the scope of the present invention, it is advantageous if the cosmetic formulation a) comprises at least one cosmetic oil, preferably at least one non-silicone cosmetic oil and / or one vegetable oil. According to the present invention, "volatile non-silicone oils" is understood to mean oils that do not contain silicon atoms and have a vapor pressure of 2.66 Pa to 40,000 Pa (0.02 to 300 mmHg), preferably 10 to 12,000 Pa (0.1 to 90 mmHg), more preferably 13 to 3,000 Pa (0.1 to 23 mmHg), in particular 15 to 500 Pa (0.1 to 4 mmHg), at 20°C and an ambient pressure of 1,013 hPa. Therefore, cosmetic preparation a) preferably contains at least one oil, and this oil is selected from the group: (i) volatile non-silicone oil, especially liquid paraffin oil and isoparaffin oil, such as isodecane, isoundecane, isododecane, isotridecane, isotetradecane, isopentadecane, isohexadecane and isoeicosane; (ii) vegetable oil, especially the liquid part of sunflower oil, olive oil, soybean oil, rapeseed oil, almond oil, jojoba oil, orange oil, wheat germ oil, peach kernel oil and coconut oil; and (iii) their mixtures.The use of the aforementioned oil in cosmetic preparation a) can lead to high skin and / or hair care effect and conditioning.

[0064] Furthermore, within the scope of the present invention, it is preferred if the cosmetic preparation a) comprises at least one wax. Thus, preferred cosmetic preparations a) are characterized in that they comprise at least one wax, which wax is selected from the group consisting of (i) coconut fatty acid glycerol mono-, di- and triesters; (ii) Butyrospermum parkii (shea butter); (iii) saturated monovalent C 8-18 Monohydric alcohols and saturated C 12-18 Esters with monocarboxylic acids; (iv) linear primary C 12- C 24 Alkanol; (v) saturated monohydric C 16 -C 60 Alkanols and saturated C8-C 36 Esters with monocarboxylic acids, especially cetyl behenate, stearyl behenate and C20 -C 40 Alkyl stearate; (vi) optionally hydroxylated saturated linear C 12 -C 30 Glycerol triesters of carboxylic acids, 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, sugarcane wax, cucumber wax, cork wax, sunflower wax, and fruit waxes; (viii) animal waxes, in particular beeswax, shellac wax, and spermaceti; (ix) synthetic waxes, in particular montan ester wax, hydrogenated jojoba wax and sazol wax, polyalkylene waxes and polyethylene glycol waxes, and dimeric acid C 20 -C 40 Dialkyl ester, C 30-50 (x) alkyl beeswax and alkyl and alkylaryl esters of dimeric fatty acids, paraffin wax; and (x) mixtures thereof. Particularly preferred are commercial products with the INCI name cocoglycerides, in particular the commercial product Novata® (formerly BASF), and especially preferred are C 12-18 Novata®, a mixture of mono-, di- and triglycerides with a melting point range of 30-32°C, and the range of products from Softisan (Sasol Germany GmbH) with the INCI name Hydrogenated Cocoglycerides, in particular Softisan 100, 133, 134, 138 and 142. 12-18 Alcohol and saturated C 12-18 Other preferred esters with monocarboxylic acids are stearyl laurate, cetearyl stearate (e.g., Crodamol® CSS), cetyl palmitate (e.g., Cutina® CP) and myristyl myristate (e.g., Cetiol® MM). 20 -C 40Alkyl stearate is used as the wax component. This ester is known as Kester Wax® K82H or Kester Wax® K80H and is distributed by Koster Keunen.

[0065] Furthermore, within the scope of the present invention, it is advantageous if the cosmetic preparation a) comprises at least one ester. Thus, according to the present invention, the cosmetic preparation comprises at least one ester, which ester is selected from the group consisting of (i) triethyl citrate, (ii) linear or branched C2-C 10 (iii) dicarboxylic acid esters of alkanols, (iv) unsaturated C 12-22 Dimers of carboxylic acids and monovalent, linear, branched and cyclic C 2-18 Alkanol or C 2-6 Esters with alkanols, (v) linear or branched C 8-22 Benzoic acid esters of alkanols, e.g., benzoic acid C 12-15 It is preferred if the ester is selected from the group consisting of alkyl esters and isostearyl benzoate and octyldodecyl benzoate, and mixtures thereof. The use of the above-mentioned esters also leads to effective care and conditioning of the skin and / or hair.

[0066] Particularly preferred embodiments of the present invention comprise at least one of the oils and / or waxes and / or esters mentioned above.

[0067] In summary, the cosmetic product of the present invention is preferably an oil-in-water (O / W) emulsion in which the cosmetic formulation a) contains 1 to 25% by weight of a cosmetic oil based on the weight of the emulsion.

[0068] In addition to the components already mentioned above, cosmetic preparations a) can in principle use all other components known to those skilled in the art for such cosmetic compositions. Other active substances, auxiliary substances and additives are, for example: thickening agents, such as gelatin or vegetable gums, e.g. agar, guar gum, alginates, xanthan gum, gum arabic, karaya gum, carob flour, linseed gum, dextrans, cellulose derivatives, e.g. methylcellulose, hydroxyalkylcellulose and carboxymethylcellulose, starch fractions and derivatives, e.g. amylose, amylopectin and dextrin, fully synthetic hydrocolloids, e.g. polyvinyl alcohol, structuring agents, such as maleic acid and lactic acid; - Solvents and solubilizers, such as ethanol, isopropanol, ethylene glycol, propylene glycol, glycerol, and diethylene glycol active substances that improve the fiber structure, in particular mono-, di- and oligosaccharides, such as glucose, galactose, fructose, fruit sugar and lactose, - dyes for coloring the drug, - pH adjusting substances, such as alpha and beta hydroxycarboxylic acids active substances, such as allantoin and bisabolol, - Complexing agents, such as EDTA, NTA, β-alanine diacetic acid, and phosphonic acids - ceramides, which are understood to mean N-acylsphingosines (fatty acid amides of sphingosine) or synthetic analogues of these lipids (so-called pseudoceramides), - Opacifying agents, such as latex, styrene / PVP, and styrene / acrylamide copolymers; pearlescent agents, such as ethylene glycol mono- and distearate, and PEG-3 distearate; - pigments, - viscosity modifiers, such as salt (NaCl), - anionic, cationic and amphoteric surfactants, - cationic, nonionic and amphoteric polymers, - Vitamins, especially those of group A, B, C, E, F, and H, UV filters, in particular benzophenones, p-aminobenzoates, diphenylacrylates, cinnamates, salicylates, benzimidazoles, and o-aminobenzoates, - protein hydrolysates and cationized protein hydrolysates, moisturizing agents or penetration promoters and / or extenders, 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, such as those from green tea, white tea, oak bark, nettle, witch hazel, hops, chamomile, burdock, horsetail, hawthorn, lime blossom, lychee, almond, aloe vera, spruce leaf, horse chestnut, sandalwood, juniper, coconut, mango, apricot, lemon, wheat, kiwi, melon, orange, grapefruit, sage, rosemary, birch, mallow, cuckoo flower, wild thyme, yarrow, thyme, melissa, sedge, coltsfoot, marshmallow, ginseng, ginger, daisy flower, olive, fennel, and celery; Silicone oils, in particular polyalkylsiloxanes, polyarylsiloxanes and polyalkylarylsiloxanes, which can optionally be functionalized with organic and / or ethoxy and / or propoxy groups.

[0069] The other ingredients mentioned above may be contained in a total amount of 0.001 to 50% by weight, preferably 0.01 to 40% by weight, more preferably 0.1 to 30% by weight, and particularly 0.5 to 20% by weight, based on the total weight of the cosmetic preparation.

[0070] The cosmetic product of the present invention comprises a device for applying a finely dispersed cosmetic preparation a), which device comprises: b1) storage containers for cosmetic preparations a); b2) a pump or similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly operating closure element for enabling the cosmetic preparation a) conveyed by the conveying element b2) from the storage container b1) to the pressure chamber b3) to be sealed against the environment; b3b) an outlet valve or a similarly operating closure element for enabling the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including:

[0071] The storage container b1) serves as a receptacle for the cosmetic composition a). It may be rigidly connected to the device, but a detachable and interchangeable design is preferred, allowing different storage containers to be connected to one device, thus also allowing different cosmetic formulations to be sprayed. The volume of the storage container b1) is ideally suited to the intended use and depends on the amount of cosmetic formulation to be applied and the desired number of applications that the storage container, once filled, should provide.

[0072] The standard capacity of the storage container is in the range of 1 to 500 ml, preferably 2 to 250 ml, and particularly 5 to 500 ml.

[0073] The product device of the present invention further comprises a pump b2) or a similarly operating conveying element for conveying the cosmetic formulation a) from the storage container b1). The conveying element b2) can be arranged directly in the storage container b1) or can be connected via a suitable line, for example a riser pipe. There are no restrictions on the technical and visual design of the (preferably exchangeable) storage container b1) and the conveying element b2).

[0074] When pumps are used as conveying elements, both hydrodynamic and positive displacement pumps can be used. In flow pumps, such as axial, mixed flow, and radial pumps, the energy transfer is achieved through a fluid process, while in positive displacement pumps, the medium is conveyed through self-contained volumes. Diaphragm pumps, rotary piston pumps, such as lobe pumps, rotary vane pumps, circumferential piston pumps, and rotary gear pumps, as well as eccentric screw pumps, impeller pumps, chain pumps, piston pumps, peristaltic pumps, and screw pumps are particularly suitable here.

[0075] The device of the product of the present invention further comprises a pressure chamber b3) in which the cosmetic formulation a) transferred from the storage container b1) can be subjected to an increase in pressure. To enable the cosmetic formulation a) to be repeatedly transferred from the storage container b1) by the transfer element b2) and subsequently sprayed, the pressure chamber b3) comprises an inlet valve b3a) or a similarly operating closure element for sealing the cosmetic formulation a) transferred from the storage container b1) to the pressure chamber b3) by the transfer element b2) from the storage container b1) to the pressure chamber b3) from the environment by sealing the cosmetic formulation a); and an outlet valve b3b) or a similarly operating closure element for allowing the cosmetic formulation a) to be applied in a finely dispersed form from the pressure chamber b3) under pressure.

[0076] The closure elements b3a) and b3b) are preferably controllable valves in which a closure part (e.g., a plate, cone, ball or needle) is moved approximately parallel to the direction of fluid flow. The flow is blocked by pressing the sealing surface of the closure part against a corresponding opening, a so-called sealing seat. With regard to the desired automatic application of the cosmetic formulation a), electric motor-driven or electromagnetically actuated valves with short opening and closing times are preferred.

[0077] According to the present invention, there is provided a spray device for a cosmetic formulation, which is capable of increasing the temperature and / or pressure of a cosmetic product and changing the state of at least a portion of the cosmetic formulation a) in a pressure chamber when the inlet valve b3a) and the outlet valve b3b) are closed.

[0078] The cosmetic composition a) conveyed by the conveying element b2) into the pressure chamber b3) may be a liquid or a mixture of liquid and gas, such as foam, preferably a liquid. The cosmetic formulation a) may also contain dispersed particulate solids.

[0079] The pressure chamber b3) includes an inlet valve b3a) and an outlet valve b3b), which are preferably located at separate, distinct positions within the pressure chamber. When the temperature and pressure within the pressure chamber increase, the liquid cosmetic composition a) within the pressure chamber partially transforms into a gas dispersed in the liquid, and bubbles are also formed. Preferably, the inlet valve b3a) and the outlet valve b3b) each include an actuator and a seat. The actuator actuation can control the opening and closing of the valve. The actuator can be a solenoid. The valve seat can provide a sealing surface that allows the valve to close and the pressure chamber to be pressurized. The cosmetic composition a) is supplied from the storage container b1) to the pressure chamber b3) and pressurized therein. The pressure increase can be achieved by any means known to those skilled in the art, such as by applying pressure using compressed gas, by reducing the volume of the pressure chamber, by shock waves, or by heating, with heating being preferred due to its ease of implementation from an apparatus standpoint.

[0080] The pressure chamber b3) is made of a material that can withstand significant temperature changes and pressure differences. It may have a generally cylindrical shape. The pressure chamber b3) may be made of 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 composite-wrapped pressure vessel. The pressure chamber b3) may be lined with different metals, ceramics, or polymers. The size and shape of the pressure chamber b3) may vary depending on the desired application.

[0081] The pressure chamber b3) can further include a device for directing and controlling the fluid flow of the cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b). Such a device is disposed within the pressure chamber and directs the cosmetic composition to follow a preferably non-linear path. The means for directing and controlling the fluid flow of the cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b), preferably along a non-linear path, can initiate and support foam formation within the pressure chamber and help ensure the presence of foam within the pressure chamber at the outlet valve b3b), resulting in improved atomization and a more uniform spray pattern.

[0082] By including a means for directing and controlling the fluid flow of cosmetic composition a) from inlet valve b3a) to outlet valve b3b) along a preferably nonlinear path within the pressure chamber, an obstruction is created within the pressure chamber, thereby preventing the fluid from moving freely within the pressure chamber when pressure chamber b3) or device b) is moved. For cosmetic applications where the position of device b) and the discharge direction of outlet valve b3b) change continuously during application (e.g., when applying hairspray to a user's head), the obstruction slows the fluid flow of cosmetic composition a) from inlet valve b3a) to outlet valve b3b) to reduce irritation or impact on the foam, and the foam is largely protected from collapse regardless of movement of pressure chamber b3).

[0083] Thus, directing the fluid comprising the cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) preferably along a nonlinear path ensures that no pool of liquid accumulates in front of the outlet valve b3b), thereby enabling efficient and effective operation of the device b). According to the present invention, a high foam concentration near the outlet valve b3b) of the pressure chamber b3) is desirable because it has been found that the size of the resulting spray droplets is smaller when a foam, rather than a liquid, is expelled from the outlet valve b3b). Further breakup of the foam occurs when the fluid is expelled from the outlet valve b3b) by a steam explosion.

[0084] These device measures ensure that the characteristics of the spray discharged from the outlet valve b3b) remain largely unaffected when the device b) is moved or its orientation changes, which improves the reproducibility of the spray characteristics achieved for a given set of conditions and also improves the reliability of the device b) in any application.

[0085] Prior to pressurizing (preferably heating) the cosmetic composition a) in the pressure chamber b3), the inlet b3a) and outlet valve b3b) are closed to prevent leakage of the cosmetic formulation a). The increase in pressure (preferably heating) of the cosmetic composition a) in the pressure chamber b3) results in an increase in pressure inside the pressure chamber b3), which also lowers the boiling point of the cosmetic composition a). In most cases, when the cosmetic composition a) in the pressure chamber b3) is pressurized (preferably by heating), it becomes foamed. The saturation point or boiling point of the fluid comprising the cosmetic composition a) is based on the boiling point of the liquid phase. The cosmetic composition a) is heated to a temperature well above its boiling point at atmospheric pressure, causing the cosmetic composition a) to change state.

[0086] The temperature within the pressure chamber b3) can be monitored by one or more temperature sensors. The means for heating the cosmetic formulation a) can be a heating element located within or near the pressure chamber to heat the cosmetic formulation a). The heating means can be, for example, a heating jacket surrounding or partially surrounding the pressure chamber b3). Alternatively, the heating medium can be generated by chemical components. For example, two chemicals can be combined that, when mixed, undergo an exothermic reaction, generating heat sufficient to heat the cosmetic formulation a) to a temperature above the saturation temperature of the liquid.

[0087] The sudden pressure relief of the cosmetic formulation a) as it exits the outlet valve b3b) creates a steam explosion due to the rapid expansion of the liquid, foam, and / or vapor. The steam explosion transports the material from the pressure chamber b3) very quickly and over distances that would otherwise be impossible. A mixture of steam and a fine mist is ejected from the outlet valve b3b), and this mixture can spread over significant distances at high velocity. For example, the reach of liquid and vapor explosions in embodiments of the present invention can be approximately 200-300 times the length of the corresponding pressure chamber, or even longer. This is due to the high fluid pressures available in the pressure chamber b3) and the dynamics of the fluid within the pressure chamber.

[0088] One advantage of device b) is its ability to deliver continuous vapor bursts at very high speeds. The control of inlet valve b3a) and outlet valve b3b) can be programmed so that outlet valve b3b) opens every few milliseconds. The temperature at which outlet valve b3b) opens can be referred to as the trigger temperature. The trigger temperature can be set higher than the boiling point of the liquid or liquids in the pressure chamber to ensure maximum liquid release from the pressure chamber. The trigger temperature can be set between 10°C and 200°C above the boiling point of the liquid. Preferably, the trigger temperature is set between 20°C and 90°C above the boiling point of the liquid. The required trigger temperature is relative to the ambient pressure of the environment in which the released spray liquid will be sprayed, i.e., the area outside the pressure chamber at the outlet opening. Higher ambient pressures require increased temperature and pressure within the pressure chamber, resulting in a trigger temperature at the upper end of that range. Selecting a higher trigger temperature allows for a change in the liquid-to-vapor ratio, which, if necessary, can completely eliminate the liquid phase. In this way, the liquid to vapor ratio can be controlled by varying one or more parameters associated with the pressure chamber. It has been found that if the trigger temperature is not at least 10°C above the boiling point of the liquid, the droplet size increases.

[0089] Alternatively, instead of monitoring the temperature, the pressure in the pressure 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 of the cosmetic composition a), such as the temperature, pressure, or viscosity, can be used to selectively control the droplet size achieved in the resulting spray. The size of the outlet opening can be varied depending on the desired spray characteristics. The outlet opening from the pressure chamber b3) can be connected to a nozzle to change the dispersion characteristics of the spray. The nozzle can be used to generate a spray mist with a wider scattering range or a narrower, more focused spray mist. The nozzle can also be used to further reduce the droplet size of the liquid in the spray, thereby generating a finer spray.

[0090] The preferably non-linear path along which the cosmetic formulation a) is guided within the pressure chamber b3) can cause the direction in which the cosmetic formulation b) is moving to change by at least 90°. The degree to which the change in direction is necessary depends on the application or end use of the device b). The non-linear path can cause the direction in which the cosmetic formulation a) is moving to change by at least 180°, 270°, or 360°. In some applications, a greater change in direction can be required to protect the foam layer within the pressure chamber from fluid movement.

[0091] In applications where the device b) may undergo a greater degree of movement, it may be preferable to direct the cosmetic formulation a) along a more complex or tortuous path, resulting in a change of at least 180°. The purpose of the nonlinear path is to prevent the liquid from undergoing sudden wave motion within the pressure chamber b3). The more the flow of the liquid is impeded, the less kinetic energy the liquid will have when it comes into contact with the bubbles, resulting in more bubbles being retained. For example, if the pressure chamber b3) undergoes a rocking motion along a single axis, it may be sufficient for the nonlinear path to direct the fluid through a change of at least 90°.

[0092] For example, a baffle or barrier within the pressure chamber can redirect the fluid by 90° to bypass the baffle. In practice, if the pressure chamber (b3) only experiences oscillating motion, the deflector plate can be positioned so that the liquid is retained on one side of the barrier, while only bubbles or gas can easily flow over the deflector plate. This depends on the relative height and placement of the baffle plate. The baffle must redirect the fluid by at least 90° to achieve the desired effect. This placement of the baffle plate prevents the cosmetic formulation (a) on the first side of the baffle plate from destroying or breaking down bubbles that may be present on the second side of the baffle plate, despite the movement of the pressure chamber. For applications where the pressure chamber experiences greater degrees of movement, possibly along multiple axes, a greater degree of nonlinear path redirection is required to prevent bubbles from being destroyed. Some applications require a change of at least 180°, while others require a change of at least 360°.

[0093] The preferably nonlinear path within the pressure chamber b3) can include at least one nonlinear flow path and can also include multiple nonlinear flow paths. Generally, when the cosmetic formulation a) is viscous, a single flow path is preferred. The means for directing and controlling the flow of fluid from the inlet opening to the outlet opening can include at least one flow path having a series of bends through which the fluid changes direction multiple times. The fluid can be directed along a tortuous path having many bends at various angles. The means for directing and controlling the flow of the cosmetic composition a) from the inlet valve b3a) to the outlet valve b3b) can include at least one spiral or helical flow path. This flow path can direct the fluid along an oscillatory or winding path. The means for directing and controlling the flow of the cosmetic composition a) along a nonlinear path from the inlet valve b3a) to the outlet valve b3b) can include at least one baffle arranged to change direction of the fluid. Optionally, it can also include a series of deflectors arranged to change direction of the fluid multiple times. A baffle is preferably disposed within the pressure chamber b3) to prevent the fluid from following a linear path between the inlet valve b3a) and the outlet valve b3b).

[0094] 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) may be arranged outside the pressure chamber b3). The heating means may be, for example, a heating jacket surrounding or partially surrounding the pressure chamber. This may be used alone or in combination with other heating means, such as heating means arranged inside the pressure chamber. At least one means for heating the fluid may be arranged inside the pressure chamber b3).

[0095] For example, a spiral flow path can be formed around a central cylindrical heating element. As a further option, at least one means for heating the fluid can be located within the pressure chamber, and means for directing and controlling the flow of fluid from the inlet opening to the outlet opening along a non-linear path can be located within the heating means, with the fluid flow being fluidically isolated from the heating means. For example, a heating coil can be configured to abut the inner wall of the pressure chamber, and the heating coil can be filled with a shaped element that ensures the fluid flow is directed along a non-linear path from the inlet valve b3a) to the outlet valve b3b).

[0096] The device b) preferably includes at least one control device connected to the inlet valve b3a) and the outlet valve b3b), so that the opening and closing of the inlet valve b3a) and the outlet valve b3b) are electronically controlled. The control device can be programmed to close the outlet valve b3b) when a closing pressure or a set temperature is reached and reopen the inlet valve b3a) to introduce new fluid into the pressure chamber. The system can alternate between introducing new fluid into the pressure chamber and releasing fluid through the outlet opening. Alternatively, the valve control device can be offset so that the pressure chamber b3) is filled with fluid and the outlet valve b3b) performs a series of short, rapid opening movements until the pressure chamber b3) is empty. The control device can be programmed to open and close the valves b3a) and b3b) according to a time sequence, with the valves opening and closing for a predetermined time, conditional on reaching or exceeding a predetermined (or set) pressure or a predetermined temperature in the pressure chamber b3).

[0097] The predetermined temperature may correspond to the saturation temperature of the fluid in the pressure chamber at atmospheric pressure. The temperature may be monitored by one or more temperature sensors, which may be mounted in or near the pressure chamber, for example in the inlet flow or on the wall of the pressure chamber. The device may also include at least one pressure sensor in the pressure chamber, which may be a pressure transducer. When fluid is released from the pressure chamber b3), the pressure in the pressure chamber decreases. The outlet valve b3b) may be arranged to close when the pressure returns to ambient pressure or a 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 time has elapsed.

[0098] A recirculation loop from the pressure chamber b3) to the storage container b1) can also be provided. The recirculation loop is designed so that when the inlet valve b3a) is open to replenish the cosmetic formulation a) in the pressure chamber b3), some of the fluid from the pressure chamber b3) can return to the storage container b1). The recirculation line allows some of the fluid to flow from the pressure chamber b3) to the storage container b1). Fresh cosmetic formulation a) is supplied from the storage container b1) by the conveying element b2) through the inlet valve b3a) to the pressure chamber b3). The returned cosmetic formulation a) is warmer than the cosmetic formulation a) in the storage container b1). The recirculation therefore serves to increase the temperature of the cosmetic formulation a) in the storage container b1). This can facilitate heating of the cosmetic formulation a) in the pressure chamber b3).

[0099] Also provided is a method for spraying a cosmetic formulation, in which the cosmetic formulation a) is conveyed from a storage container b1) by a pump or a conveying element operating in a similar manner to a device for finely dispersing and applying the cosmetic formulation a) from the storage container b1), and the cosmetic formulation a) conveyed from the storage container b1) moves to a pressure chamber where it can be subjected to an increase in pressure. The pressure chamber b3) includes an inlet valve or a similarly operating closure element to enable the cosmetic formulation a) conveyed from the storage container b1) to the pressure chamber b3) by the conveying element b2) to be sealed against the environment. The pressure chamber b3) further includes an outlet valve or a similarly operating closure element to enable the cosmetic formulation a) to be applied in finely dispersing and applied from the pressure chamber b3) under pressure, and the cosmetic formulation a) is conveyed to a pressure chamber b3) under pressure at a pressure of 0.02 to 2.0 Wm -1 K -1 It has a thermal conductivity of

[0100] The above description of the apparatus also applies mutatis mutandis to the spraying method.

Claims

1. a) cosmetic preparations, b) a device for applying the cosmetic preparation a) in finely dispersed form, b1) a storage container for the cosmetic preparation a); b2) a pump or a similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly acting closure element for sealing the cosmetic preparation a) conveyed from the storage container b1) into the pressure chamber b3) by the conveying element b2) from the storage container b1) against the environment; b3b) an outlet valve or a similarly acting closure element to allow the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including: A cosmetic product comprising: The cosmetic preparation a) has a viscosity of 0.02 to 2.0 Wm at 25°C. －１ K －１ A cosmetic product characterized by having a thermal conductivity of

2. a) a cosmetic preparation, b) a device for applying the cosmetic preparation a) in finely dispersed form, b1) a storage container for the cosmetic preparation a); b2) a pump or a similarly operating conveying element for conveying the cosmetic preparation a) from the storage container b1); b3) a pressure chamber in which the cosmetic preparation a) delivered from the storage container b1) can be subjected to an increased pressure, comprising: b3a) an inlet valve or a similarly acting closure element for sealing the cosmetic preparation a) conveyed from the storage container b1) into the pressure chamber b3) by the conveying element b2) from the storage container b1) against the environment; b3b) an outlet valve or a similarly acting closure element to allow the cosmetic preparation a) to be applied in finely dispersed form from the pressure chamber b3) under pressure; a pressure chamber including: A method for spraying a cosmetic preparation by spraying the cosmetic preparation by The cosmetic preparation a) has a viscosity of 0.02 to 2.0 Wm at 25°C. －１ K －１ The method of claim 1, wherein the thermal conductivity is

3. The cosmetic preparation a) has a viscosity of 0.05 to 1.5 Wm at 25°C. －１ K －１ , preferably 0.1 to 1.0 Wm －１ K －１ , especially 0.2 to 0.6 Wm －１ K －１ 3. The cosmetic product according to claim 1 or the method according to claim 2, characterized in that it has a thermal conductivity of

4. The cosmetic preparation a) has a viscosity of 1.6 to 5.2 Jg at 20°C. －１ K －１ 4. A cosmetic product according to claim 1 or claim 3, or a method according to claim 2 or claim 3, characterized in that it has a specific heat capacity of

5. The cosmetic preparation a) has a pH of 0.0001 to 0.005K －１ A cosmetic product according to claim 1 or any one of claims 3 to 4, or a method according to any one of claims 2 to 4, characterized in that it has a volumetric thermal expansion coefficient γ(20°C) of

6. 6. A cosmetic product according to claim 1 or any one of claims 3 to 5 or a method according to any one of claims 2 to 5, characterized in that the cosmetic preparation a) has a vapor pressure (according to the Grain-Watson model) of 1200 to 8000 Pa at 20°C.

7. 7. A cosmetic product according to claim 1 or any one of claims 3 to 6 or a method according to any one of claims 2 to 6, characterized in that the cosmetic preparation a) has a viscosity of 500 to 25,000 mPas at 20°C (Brookfield DV2T, 20 rpm, spindle 5).

8. 7. A cosmetic product according to claim 1 or any one of claims 3 to 6 or a method according to any one of claims 2 to 6, characterized in that the cosmetic preparation a) has a viscosity of 10 to 100 mPas at 20°C (Brookfield DV2T, 10 rpm, spindle 2).

9. A cosmetic product according to claim 1 or any one of claims 3 to 8 or a method according to any one of claims 2 to 8, characterized in that the cosmetic preparation a) is an oil-in-water (O / W) emulsion comprising 1 to 25% by weight of a cosmetic oil, based on the weight of the cosmetic preparation a).

10. A cosmetic product according to claim 1 or any one of claims 3 to 9, or a method according to any one of claims 2 to 9, characterized in that the cosmetic preparation a) comprises at least 5% by weight of a first solvent LM1 that is liquid at 20°C and at least 5% by weight of at least one second solvent LM2 that is liquid at 20°C, wherein the difference in boiling points of solvents LM1 and LM2 at 1013.25 mbar is in the range from 5 to 50°C.

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