Two-phase cosmetic composition and its uses

Abstract

The present invention relates to a dual-phase cosmetic composition in which two separate phases are present as an emulsion phase and a clear aqueous phase. The present invention also relates to a method for applying the dual-phase cosmetic composition containing a cosmetic active ingredient and to the use of the dual-phase cosmetic composition as a delivery system for the cosmetic active ingredient.

Description

[[Technical Field]]

[0001] The present invention relates to a two-phase cosmetic composition in which two separate phases exist as an emulsion phase and a transparent aqueous phase. The present invention also relates to a method for applying a two-phase cosmetic composition comprising a cosmetically active ingredient, and to the use of the two-phase cosmetic composition as a delivery system for cosmetically active ingredients. [[Background Art]]

[0002] Conventional two-phase cosmetic compositions, that is, compositions that comprise two immiscible phases distinguishable from each other when left standing, and when the composition is shaken, one phase can be dispersed in the other phase, generally in the form of fine droplets or microdroplets, to form a macroscopically homogeneous mixture, are known. Typically, these compositions comprise an aqueous phase and an oily phase as two separate phases.

[0003] Applying oil to the skin provides distinctly perceptible softness, visual gloss and protective effect, but on the other hand, it has problems such as unpleasant stickiness and heavy feel, so it is not fully satisfactory as a cosmetic.

[0004] Accordingly, there is a need for a two-phase cosmetic composition that can simultaneously deliver an aqueous component and an oily component while providing the skin with a very soft and fresh feel, and can provide not only a cleansing effect but also a skin care effect of moisturizing and smoothing the skin. In addition to this, it is advantageous if the composition further has a unique attractive appearance that attracts consumers. Such a composition requires that while reducing the amount of oily components, the components of each phase are delivered while maintaining their respective advantages. Furthermore, in this type of cosmetic composition, there is also a need to reduce the content of surfactants that may cause unintended harmful effects on the skin and problems of bioaccumulation. [[Summary of Invention]] [[Problem to be Solved by the Invention]]

[0005] An object of the present invention is to provide a two-phase cosmetic composition in which two separate phases exist as an emulsion phase and a transparent aqueous phase. When this composition is shaken, the two phases mix together to temporarily form a uniform emulsion, and when subsequently applied to the skin, a very soft and fresh feeling is obtained. After a settling period of within 8 hours, preferably within 6 hours, a distinct interface between the two phases is restored. [Means for Solving the Problems]

[0006] The object of the present invention is achieved by a compound of formula R-O-(R’) n H (wherein R is a saturated or unsaturated linear or branched C8~C 22 hydrocarbon chain, R' is selected from the group consisting of oxyethylene groups, oxypropylene groups, and combinations thereof, and n is 2 to 30), which is a two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether, wherein the fatty alcohol polyoxyalkylene ether is preferably present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition. The object can be achieved by the two-phase cosmetic composition.

[0007] A further object of the present invention is to provide a compound of formula R-O-(R’) n H (wherein R is a saturated or unsaturated linear or branched C8~ 22 hydrocarbon chain or a saturated or unsaturated linear or branched C8~ 22a mixture of hydrocarbon chains, R' is selected from the group consisting of oxyethylene groups, oxypropylene groups, and combinations thereof, and n is 2 to 30), and at least one oil component, wherein the oil component comprises hydrocarbons and hydrocarbon derivatives, glycerides, ethers, esters, carbonates, fatty alcohols, fatty acids, fatty acid esters, fatty alcohol ethers, vegetable oils, animal oils, silicone oils, mineral oil (paraffin oil) and combinations thereof, and preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, can be achieved by a two-phase cosmetic composition.

[0008] A further object of the present invention is to provide a compound of formula R-O-(R') n H (R is a saturated or unsaturated linear or branched C8 to C 22 hydrocarbon chain, or a mixture of saturated or unsaturated linear or branched C8 to C 22 hydrocarbon chains, R' is selected from the group consisting of oxyethylene groups, oxypropylene groups, and combinations thereof, and n is 2 to 30), and at least one fatty alcohol having 6 to 22 carbon atoms, wherein preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, can be achieved by a two-phase cosmetic composition.

[0009] A further object of the present invention is to provide a compound of formula R-O-(R') n H (wherein R is a saturated or unsaturated linear or branched C8 to C 22 hydrocarbon chain, or a mixture of saturated or unsaturated linear or branched C8 to C 22A two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group, an oxypropylene group, and combinations thereof, and n is 2 to 30) and a fatty alcohol having 6 to 22 carbon atoms, preferably, the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, and the weight ratio of fatty alcohol polyoxyalkylene ether to fatty alcohol is 1:10 to 10:1, which can be achieved by a two-phase cosmetic composition.

[0010] Furthermore, the objective of the present invention is the formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22 This can be achieved by a two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of oxyethylene groups, oxypropylene groups and combinations thereof, and n is 2 to 30) and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants, wherein preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, and the anionic surfactant or amphoteric surfactant is present in an amount of 0.001 to 5% by weight based on the total weight of the two-phase cosmetic composition.

[0011] Furthermore, the objective of the present invention is the formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22A two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of oxyethylene groups, oxypropylene groups and combinations thereof, and n is 2 to 30), a fatty alcohol having 6 to 22 carbon atoms, and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants, preferably, the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, the weight ratio of fatty alcohol polyoxyalkylene ether to fatty alcohol is 1:10 to 10:1, and the anionic surfactant or amphoteric surfactant is present in an amount of 0.001 to 5% by weight based on the total weight of the two-phase cosmetic composition.

[0012] Therefore, in the first embodiment, the present invention relates to the formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22 The present invention provides a two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group, an oxypropylene group, and combinations thereof, and n is 2 to 30), wherein two separate phases exist as an emulsion phase and a clear aqueous phase, and preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition.

[0013] In some embodiments, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol polyoxyalkylene ether and a fatty alcohol having 6 to 22 carbon atoms, preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, and the weight ratio of fatty alcohol polyoxyalkylene ether to fatty alcohol is 1:10 to 10:1.

[0014] In other embodiments, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol polyoxyalkylene ether and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants, preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, and the anionic surfactant or amphoteric surfactant is present in an amount of 0.001 to 5% by weight based on the total weight of the two-phase cosmetic composition.

[0015] In another preferred embodiment, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol polyoxyalkylene ether, a fatty alcohol having 6 to 22 carbon atoms, and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants, preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition, the weight ratio of fatty alcohol polyoxyalkylene ether to fatty alcohol is 1:10 to 10:1, and the anionic surfactant or amphoteric surfactant is present in an amount of 0.001 to 5% by weight based on the total weight of the two-phase cosmetic composition.

[0016] In a second aspect, the present invention provides a method for preparing a two-phase cosmetic composition according to the present invention, the method comprising mixing the components of the two-phase cosmetic composition.

[0017] In a third aspect, the present invention provides a two-phase cosmetic composition containing a beauty active ingredient that is stably present in the composition.

[0018] In a fourth aspect, the present invention provides the use of a two-phase cosmetic composition according to the present invention as a delivery system for cosmetic active ingredients.

[0019] In a fifth aspect, the present invention provides a method for applying a two-phase cosmetic composition containing a cosmetic active ingredient according to the present invention, comprising shaking the composition to form a macroscopically homogeneous mixture, and applying the mixture to the skin.

[0020] The two-phase cosmetic composition according to the present invention comprises two separate phases, an emulsion phase and a substantially transparent or transparent aqueous phase, and it has been found that when left standing, the emulsion phase floats on top of the aqueous phase, forming a distinct interface between the two phases. When the two-phase cosmetic composition according to the present invention is shaken, the two phases mix to temporarily form a uniform emulsion, and after a sedimentation period of up to 8 hours, preferably up to 6 hours, the distinct interface between the two phases returns. The two-phase cosmetic composition according to the present invention can deliver aqueous and oily components simultaneously while providing the skin with a very soft and refreshing feel. The two-phase cosmetic composition according to the present invention can deliver the components of each phase while retaining their respective advantages, while reducing the amount of oily components. The two-phase cosmetic composition according to the present invention has a reduced content of surfactants, which can cause unintended adverse effects on the skin and problems of bioaccumulation. [Brief explanation of the drawing]

[0021] [Figure 1] This photograph shows a two-phase cosmetic composition of Example 1 of the present invention, which includes an emulsion phase and a transparent aqueous phase, when left to stand. The emulsion phase floats on top of the transparent aqueous phase when left to stand, and the interface between the two phases is clearly formed. [Figure 2] This image shows a photograph of the composition of Comparative Example 1 after standing, where phase separation of water and oil has occurred, and a cotton-like precipitate has appeared in the aqueous phase. [Figure 3] This image shows a photograph of the composition of Comparative Example 2 after standing, where the water and oil have separated without forming a two-phase cosmetic composition containing an emulsion phase and a transparent aqueous phase. [Modes for carrying out the invention]

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by a person ordinary in the art to which this invention pertains.

[0023] When used in defining a term, the expressions “a” or “an” and “the” encompass both the singular and plural forms of that term.

[0024] Unless otherwise specified, all percentages, parts, and ratios are given by the total weight of the composition. All such weights for the listed components are based on the specific ingredient level unless otherwise specified, and therefore do not include carriers or by-products that may be present in commercially available materials.

[0025] In a first embodiment, the present invention relates to the formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22 The present invention provides a two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group and an oxypropylene group and combinations thereof, preferably an oxyethylene group, and n is 2 to 30), wherein two separate phases exist as an emulsion phase and a clear aqueous phase, and preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition.

[0026] Fatty alcohol polyoxyalkylene ether The fatty alcohol polyoxyalkylene ether related to the present invention is of formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22A mixture of hydrocarbon chains, preferably saturated or unsaturated straight or branched carbon chains. 10 ~C 20 Hydrocarbon chains or saturated or unsaturated straight or branched carbon 10 ~C 20 A mixture of hydrocarbon chains, more preferably saturated or unsaturated straight or branched carbon 12 ~C 18 Hydrocarbon chains or saturated or unsaturated straight or branched carbon 12 ~C 18 It is a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group and an oxypropylene group and combinations thereof, preferably an oxyethylene group, and n is 2 to 30, preferably 10 to 30, more preferably 15 to 30).

[0027] Non-limiting examples of fatty alcohol polyoxyalkylene ethers include a series of ceteares such as ceteares-2 to ceteares-30, preferably ceteares-10, ceteares-20, or ceteares-30, more preferably ceteares-20 or ceteares-30; a series of ceteths such as ceteth-2 to ceteth-30, preferably ceteth-10, ceteth-20, or ceteth-30, more preferably ceteth-20 or ceteth-30; a series of steareths such as steareth-2 to steareth-30, preferably steareth-10, steareth-20, or steareth-30, more preferably steareth-20 or steareth-30; and a series of laureths such as laureth-2 to laureth-30, preferably laureth-10, laureth-20, or laureth-30, more preferably laureth-20 or laureth-30. Examples include fatty alcohol polyoxyethylene ethers selected from the group consisting of reth-30; fatty alcohol polyoxypropylene ethers selected from the group consisting of PPG-10 cetyl ether, PPG-28 cetyl ether, PPG-30 cetyl ether and PPG-11 stearyl ether; and fatty alcohol polyoxyethylene polyoxypropylene ethers selected from the group consisting of PPG-4 ceteareth-12, PPG-4 ceteareth-20, PPG-10 ceteareth-20, PPG-4 ceteth-1, PPG-4 ceteth-5, PPG-4 ceteth-10, PPG-4 deceth-4, PPG-5 ceteth-20, PPG-8 ceteth-1, PPG-8 ceteth-2, PPG-8 ceteth-5, PPG-8 ceteth-10, PPG-8 ceteth-20 and PPG-9 steareth-3.

[0028] In preferred embodiments, fatty alcohol polyoxyalkylene ethers include fatty alcohol polyoxyethylene ethers selected from the group consisting of a series of ceteares such as ceteares-2 to ceteares-30, preferably ceteares-10, ceteares-20, or ceteares-30, more preferably ceteares-20 or ceteares-30; a series of ceteths such as ceteth-2 to ceteth-30, preferably ceteth-10, ceteth-20, or ceteth-30, more preferably ceteth-20 or ceteth-30; and a series of laureths such as laureth-2 to laureth-30, preferably laureth-10, laureth-20, or laureth-30, more preferably laureth-20 or laureth-30.

[0029] In a more preferred embodiment, the fatty alcohol polyoxyalkylene ether may be a fatty alcohol polyoxyethylene ether selected from the group consisting of a series of ceteares such as ceteares-2 to ceteares-30, preferably ceteares-10, ceteares-20, or ceteares-30, and more preferably ceteares-20 or ceteares-30 (for example, Eumulgin® B2 (commercially available from BASF) and Eumulgin® B3 (commercially available from BASF)).

[0030] The fatty alcohol polyoxyalkylene ether can be present in an amount of 0.001 to 1.0% by weight, for example, 0.005 to 0.2% by weight, preferably 0.01 to 0.15% by weight, and more preferably 0.03 to 0.1% by weight, based on the total weight of the two-phase cosmetic composition.

[0031] oil component The two-phase cosmetic composition according to the present invention contains an oil component in the emulsion phase. The oil component may include hydrocarbons and hydrocarbon derivatives, glycerides, ethers, esters, carbonate esters, fatty alcohols, fatty acids, fatty acid esters, fatty alcohol ethers, vegetable oils, animal oils, silicone oils, mineral oils (paraffin oils), and combinations thereof.

[0032] The oil component of the two-phase cosmetic composition according to the present invention is advantageously selected from lecithin and fatty acid triglycerides, i.e., triglycerol esters of saturated and / or unsaturated branched and / or unbranched alkanecarboxylic acids having a chain length of 8 to 24 carbon atoms, particularly 12 to 18 carbon atoms. The fatty acid triglycerides can be advantageously selected from synthetic, semi-synthetic and natural oils, such as olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, castor oil, wheat germ oil, grape seed oil, safflower oil, evening primrose oil, macadamia nut oil, and the like. Further polar oil components can be selected from the group consisting of esters of saturated and / or unsaturated branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms and saturated and / or unsaturated branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms, and from the group consisting of esters of aromatic carboxylic acids and saturated and / or unsaturated branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms. In that case, the ester oils of this type can be advantageously selected from the group consisting of isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, dicaprylyl carbonate (e.g., Cetiol® CC (commercially available from BASF)) and cocoglycerides (Myritol® 331), di(caprylic / capric acid) BG and dibutyl adipate, as well as synthetic, semi-synthetic and natural mixtures of these esters, such as jojoba oil.

[0033] Furthermore, one or more types of oil components are advantageously C 10 ~C 18The following can be selected: branched and unbranched hydrocarbons such as alkanes, preferably undecane or tridecane, or combinations thereof (e.g., Cetiol® Ultimate (commercially available from BASF)), and dialkyl ethers such as dicaprylyl ether (e.g., Cetiol® OE (commercially available from BASF)).

[0034] Preferably, one or more oil components can be advantageously selected from the group consisting of fatty acids having 12 to 20 carbon atoms, preferably 14 to 18 carbon atoms, such as lauric acid, palmitic acid, myristic acid, or stearic acid, preferably palmitic acid (e.g., EDENOR® C16-98MY BD (commercially available from Emery)).

[0035] Advantageously, the oil component may also contain cyclic or linear silicone oils, or may consist entirely of this type of oil, but it is preferable to use it in combination with additional oil phase components in addition to this one or more types of silicone oils.

[0036] Low molecular weight silicones or silicone oils are generally defined by the following general formula: [ka] Silicones or silicone oils with higher molecular weights are generally defined by the following general formula: [ka] (In the formula, the silicon atom may be substituted with the same or different alkyl and / or aryl groups, which are referred to herein by the general terms R1 to R4). However, the maximum number of different groups is not necessarily limited to four. In this specification, m can be a value between 2 and 200,000.

[0037] The cyclic silicones advantageously used in the present invention are generally defined by the following general formula: [ka] (In the formula, the silicon atom may be substituted with the same or different alkyl and / or aryl groups, which are referred to herein by the general notation R1 to R4). However, the maximum number of different groups is not necessarily limited to 4. In this specification, n can be assumed to be a value from 3 / 2 to 20. The fractional value of n takes into account the possibility of an odd number of siloxyl groups being present in the ring.

[0038] As the silicone oil, phenyl trimethicone is advantageously selected. Other silicone oils, such as dimethicone, hexamethylcyclotrisiloxane, phenyl dimethicone, cyclomethicone (e.g., decamethylcyclopentasiloxane, cyclopentasiloxane cyclohexasiloxane), hexamethylcyclotrisiloxane, polydimethylsiloxane, poly(methylphenylsiloxane), cetyl dimethicone, and behenoxydimethicone, can also be advantageously used within the scope relevant to the present invention. In addition to mixtures of cyclomethicone and isotridecyl isononanoate, mixtures of cyclomethicone and 2-ethylhexyl isostearate are also advantageous.

[0039] However, it is also advantageous to select silicone oils that have a structure similar to the compounds described above, but whose organic side chains are derivatized, for example, polyethoxylated and / or polypropoxylated. Examples of such materials include polysiloxane polyalkyl-polyether copolymers, such as cetyl dimethicone copolyols.

[0040] Suitable oil components for cosmetic formulations are described in Karl-Heinz Schrader, Grundlagen und Rezepturen der Kosmetika [Fundamentals and Formulations of Cosmetics], 2nd edition, Verlag Huethig, Heidelberg, pp. 319-355, which are incorporated herein by reference in their entirety.

[0041] In preferred embodiments, the oil component is preferably from the group consisting of esters of saturated and / or unsaturated branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms and saturated and / or unsaturated branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms, and from the group consisting of esters of aromatic carboxylic acids and saturated and / or unsaturated branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms, isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-butyl oleate From the group consisting of syl, isooctyl stearate, isononyl stearate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, dicaprylyl carbonate (e.g., Cetiol® CC (commercially available from BASF)) and cocoglycerides (Myritol® 331), di(caprylic / capric acid) BG and dibutyl adipate, and synthetic, semi-synthetic and natural mixtures of these esters, e.g., jojoba oil; and C 10 ~C 18 The following are selected from the group consisting of branched and unbranched hydrocarbons such as alkanes, preferably undecane or tridecane or a combination thereof (e.g., Cetiol® Ultimate (commercially available from BASF)), dialkyl ethers such as dicaprylyl ether (e.g., Cetiol® OE (commercially available from BASF)), and fatty acids having 12 to 20 carbon atoms, preferably 14 to 18 carbon atoms, such as lauric acid, myristic palmitate or stearic acid, preferably palmitic acid (e.g., EDENOR® C16-98MY BD (commercially available from Emery)).

[0042] The oil component may be present in an amount of 1 to 20% by weight, preferably 2 to 18% by weight, more preferably 3 to 16% by weight, and even more preferably 3 to 12% by weight, based on the total weight of the two-phase cosmetic composition.

[0043] In a more preferred embodiment, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol having 6 to 22 carbon atoms.

[0044] Fatty alcohols suitable for use in two-phase cosmetic compositions as used herein are saturated or unsaturated branched or unbranched alcohols having 6 to 22, preferably 10 to 20, more preferably 12 to 18 carbon atoms, such as 2-butyloctanol (e.g., commercially available as lsofol® 12 (Condea)), 2-hexyldecanol (e.g., commercially available as lsofol® 16 (Condea)), and mixtures of 2-butyloctanol and 2-hexyldecanol (e.g., commercially available as lsofol® 14 (Condea)). The alcohols are preferably selected from the group consisting of cetyl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol (e.g., Lanette® O (commercially available from BASF)), oleyl alcohol, octyldodecanol (e.g., Eutanol® G (commercially available from BASF)), and more preferably cetearyl alcohol.

[0045] The weight ratio of fatty alcohol polyoxyalkylene ether to fatty alcohol is 1:10 to 10:1, preferably 1:8 to 5:1, and more preferably 1:5 to 1:1.

[0046] Anionic surfactants In other embodiments, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol polyoxyalkylene ether and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants.

[0047] In another preferred embodiment, the two-phase cosmetic composition according to the present invention comprises a fatty alcohol polyoxyalkylene ether, a fatty alcohol having 6 to 22 carbon atoms, and at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants, wherein the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight based on the total weight of the two-phase cosmetic composition.

[0048] The compositions of the present invention may contain any anionic surfactant commonly used in cosmetic compositions. Preferred anionic surfactants include sulfate-type anionic surfactants, amino acid-type anionic surfactants, sulfosuccinate-type anionic surfactants, and sulfonated fatty acid-type and / or disalt-type anionic surfactants.

[0049] Some non-limiting examples of suitable sulfate-type anionic surfactants include, for example, ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, sodium lauric monoglyceride sodium sulfate, sodium lauryl sulfate, sodium laureth sulfate, potassium lauryl sulfate, potassium laureth sulfate, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauroyl sulfate, ammonium cetearyl sulfate, sodium cetearyl sulfate, potassium cetearyl sulfate and combinations thereof, preferably ammonium laureth sulfate, sodium laureth sulfate, potassium laureth sulfate, ammonium cetearyl sulfate, sodium cetearyl sulfate and potassium cetearyl sulfate, more preferably sodium laureth sulfate and sodium cetearyl sulfate (e.g., Lanette® E Examples include Granules (commercially available from BASF), Texapon® NSOUP (commercially available from BASF), Texapon® OC-P (commercially available from BASF), Texapon® OC-N (commercially available from BASF), Texapon® N 703 (commercially available from BASF), Texapon® N 701 (commercially available from BASF), Texapon® N 70 (commercially available from BASF), and Texapon® N 28 S (commercially available from BASF).

[0050] Non-limiting examples of suitable amino acid-type anionic surfactants include acyl glutamates, acyl taurines, acyl glycines, acyl alanines, acyl sarcosines, and acyl aspartates. Examples of salts include alkali metal salts such as sodium (Na) and potassium (K); alkaline earth metal salts such as calcium (Ca) and magnesium (Mg) salts; triethanolamine (TEA); and ammonium salts. More preferred are, for example, potassium salts, sodium salts, triethanolamine salts, and ammonium salts, particularly sodium salts.

[0051] Preferably, the acyl glutamate is cocoyl glutamate, lauroyl glutamate, myristoyl glutamate, palmitoyl glutamate, stearoyl glutamate, hydrogenated beef tallow fatty acid acyl glutamate, olive oil fatty acid acyl glutamate and octanoyl glutamate, for example, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, disodium stearoyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate and potassium myristoyl glutamate, more preferably sodium cocoyl glutamate and sodium stearoyl glutamate (for example, Plantapon® Amino SCG-L (commercially available from BASF), Plantapon® Amino Examples include SLG-P (INCI: Sodium Lauroyl Glutamate, commercially available from BASF), Plantapon® ACG LC (commercially available from BASF), Plantapon® ACG HC (commercially available from BASF), Plantapon® ACG 35 (commercially available from BASF), Plantapon® ACG 50 (commercially available from BASF), Eumulgin® SG (commercially available from BASF), Hostapon® KCG (commercially available from Clariant), and Hostapon® KCG (commercially available from Clariant).

[0052] Preferably, acyl taurine salts include cocoyl taurine salt, cocoyl methyl taurine salt, laurate taurine salt, lauroyl methyl taurine salt, stearoyl methyl taurine salt, myristoyl methyl taurine salt, palmitoyl methyl taurine salt, oleoyl methyl taurine salt, hexanol methyl taurine salt, and lauroyl methyl β-alanine taurine salt. Particularly preferred are, for example, cocoyl taurine salt, cocoyl methyl taurine salt, laurate taurine salt, lauroyl taurine salt, and lauroyl methyl taurine salt. More particularly preferred are, for example, sodium cocoyl taurate, potassium cocoyl methyl taurate, sodium cocoyl methyl taurate, magnesium cocoyl methyl taurate, sodium cocoyl methyl taurate, potassium lauroyl taurate, sodium lauroyl taurate, and sodium lauroyl methyl taurate, and more preferably sodium methyl cocoyl taurate (for example, NEOSCOAP CDT-30(CR), NEOSCOAPCDT-30-SF(CR), NEOSCOAP CDT-30-SF, NEOSCOAP CN-30(CR), and NEOSCOAP CN-30-SF (commercially available from Toho Chemical Industry)).

[0053] Preferably, the acylglycine salts include cocoyl glycine salt, palmitoyl glycine salt, octanoyl glycine salt, and undecylenoyl glycine salt. More preferably, for example, is cocoyl glycine salt. Particularly preferred are, for example, potassium cocoyl glycine (Plantapon® Amino KG-L and Plantapon® Amino KG-P, commercially available from BASF) and sodium cocoyl glycine, with sodium cocoyl glycine being more preferred.

[0054] Preferably, the acylalanine salts include cocoyl alanine salt, cocoyl methylalanine salt, lauroyl methylalanine salt, and myristoyl methylalanine salt. More preferably, for example, cocoyl alanine salt, cocoyl methylalanine salt, and lauroyl methylalanine salt. Particularly preferred are, for example, sodium cocoyl alanine, cocoyl alanine TEA, sodium cocoyl methylalanine, sodium lauroyl methylalanine, and lauroyl methylalanine TEA, with sodium cocoyl alanine being more preferred.

[0055] Preferably, the acyl sarcosine salts include cocoyl sarcosine salt, lauroyl sarcosine salt, myristoyl sarcosine salt, palmitoyl sarcosine salt, and oleoyl sarcosine salt. Particularly preferred are, for example, cocoyl sarcosine salt and lauroyl sarcosine salt. Even more particularly preferred are, for example, potassium cocoyl sarcosine, sodium cocoyl sarcosine, cocoyl sarcosine TEA, potassium lauroyl sarcosine, sodium lauroyl sarcosine, and lauroyl sarcosine TEA, and more preferably sodium cocoyl sarcosine.

[0056] Preferably, acyl aspartates include palmitoyl aspartate, myristoyl aspartate, lauryl aspartate, and lauroyl aspartate. More preferably, for example, are lauryl aspartate and lauroyl aspartate salts. Particularly preferred are potassium lauryl aspartate, sodium lauryl aspartate, TEA lauryl aspartate, and sodium lauroyl aspartate, with sodium lauroyl aspartate being more preferred.

[0057] Non-limiting examples of suitable sulfosuccinate-type anionic surfactants include sodium dioctyl sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, disodium cetearyl sulfosuccinate, disodium undecylenamide MEA sulfosuccinate, and disodium PEG-5 lauryl citrate sulfosuccinate, preferably disodium lauryl sulfosuccinate and disodium cetearyl sulfosuccinate, more preferably disodium cetearyl sulfosuccinate (e.g., Eumulgin® Prisma (commercially available from BASF)).

[0058] A non-limiting example of a suitable sulfonated fatty acid and / or dichloride-type anionic surfactant is formula (1): R 0 CH(SO3M 1 )COOM 2 (1) (In the formula, R 0 This refers to saturated or unsaturated linear or branched C8-C 16 It is a hydrocarbon chain, M 1 and M 2 It is a compound of H, Li, Na, K, Ca / 2, Mg / 2, ammonium, or an alkanolamine.

[0059] Preferably, R 0 This is a saturated straight chain C8~C 16 A hydrocarbon chain, preferably a saturated linear C 10 ~C 14 It is a hydrocarbon chain.

[0060] more, M 1 and M 2 It is Na.

[0061] Most preferably, the sulfonated fatty acid and / or dichloride-type anionic surfactant is disodium 2-sulfolaurate (e.g., Texapon® SFA (commercially available from BASF)).

[0062] The anionic surfactant may be present in an amount of 0.001 to 5% by weight, preferably 0.005 to 1% by weight, more preferably 0.006 to 0.5% by weight, more preferably 0.01 to 0.1% by weight, and most preferably 0.04 to 0.1% by weight, based on the total weight of the two-phase cosmetic composition.

[0063] Amphoteric surfactants Non-limiting examples of suitable amphoteric surfactants include sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate, sodium acylamphopropionate, and sodium N-coconut fatty acid amide ethyl N-hydroxyethylglycine salt.

[0064] Even more advantageous amphoteric surfactants are N-alkyl amino acids, such as aminopropylalkyl glutamide, alkylaminopropionic acid, sodium alkylimidodipropionate, and disodium lauroamphodiacetate.

[0065] Other suitable amphoteric surfactants include, for example, alkyl betaine, alkylamidopropyl betaine, alkyl sulfobetaine, alkyl glycinate, alkyl carboxyglycinate, alkyl amphoacetate or propionate, alkyl amphodiacetate or dipropionate, preferably cocodimethylsulfopropyl betaine, lauryl betaine, cocamidopropyl betaine or sodium cocoamphopropionate, more preferably cocamidopropyl betaine (e.g., Dehyton® PK 45 (commercially available from BASF), Dehyton® KE-AS (commercially available from BASF), Dehyton® K / I5 (commercially available from BASF), Dehyton® DC-AS, Dehyton® ML, TEGO® Betain P 50 C (commercially available from Evonik), TEGO® Betain F 50 (commercially available from Evonik), and Genagen® CAB 818 (commercially available from Clariant)).

[0066] The amphoteric surfactant may be present in an amount of 0.001 to 5% by weight, preferably 0.005 to 1% by weight, more preferably 0.006 to 0.5% by weight, more preferably 0.01 to 0.1% by weight, and most preferably 0.04 to 0.1% by weight, based on the total weight of the two-phase cosmetic composition.

[0067] In another preferred embodiment, the two-phase cosmetic composition according to the present invention further comprises the following other components:

[0068] Humectant Suitable humectants for the two-phase cosmetic composition according to the present invention are ethoxylated or non-ethoxylated monoalcohols, diols, or polyols or ethers thereof with a low number of carbon atoms (e.g., ethanol, isopropanol, 1,2-dipropanediol, propylene glycol, glycerin, ethylene glycol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether (butyl glycol), propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, diethylene glycol monomethyl ether; diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, and similar products). Polyols considered for this purpose preferably have 2 to 15 carbon atoms and at least 2 hydroxyl groups. Polyols may also contain further functional groups, particularly amino groups, and / or be modified with nitrogen. Typical examples include: glycerol, alkylene glycols, e.g., ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, hexylene glycol, in addition to polyethylene glycol with an average molecular weight of 100-1000 daltons (e.g., Pluracare® E400 (commercially available from BASF)); industrial oligoglycerol mixtures with an intrinsic degree of condensation of 1.5-10, e.g., industrial diglycerol with a diglycerol content of 40-50% by weight; and methylol. Compounds, particularly trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol and dipentaerythritol; lower alkyl glucosides, particularly those having 1 to 8 carbon atoms in the alkyl group, e.g., methyl and butyl glucosides; sugar alcohols having 5 to 12 carbon atoms, e.g., sorbitol or mannitol; sugars having 5 to 12 carbon atoms, e.g., glucose or saccharose; amino sugars, e.g., glucamine; dialcoholamines, e.g., diethanolamine or 2-amino-1,3-propanediol.

[0069] The humectant may be present in an amount of 0.01 to 30% by weight, preferably 0.1 to 15% by weight, and more preferably 1 to 5% by weight, based on the total weight of the two-phase cosmetic composition.

[0070] Chelating agents Chelating agents suitable for the two-phase cosmetic composition according to the present invention can be selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), EDTA dipotassium salt, EDTA disodium salt, EDTA tetrasodium salt, EDTA diammonium salt, EDTA calcium disodium, TEA-EDTA, EDTA tripotassium salt, EDTA trisodium salt, hydroxyethylethylenediaminetriacetic acid (HEDTA), HEDTA trisodium salt, and combinations thereof. In one embodiment, the chelating agent includes EDTA disodium salt (e.g., Edeta® BD (commercially available from BASF)).

[0071] The chelating agent may be present in an amount of 0.001 to 1% by weight, preferably 0.01 to 1.0% by weight, and more preferably 0.05 to 0.5% by weight, based on the total weight of the two-phase cosmetic composition.

[0072] Thickening agent Suitable thickeners for the two-phase cosmetic composition according to the present invention include polysaccharides, preferably xanthan gum (e.g., Rheocare® XGN (commercially available from BASF)), guar gum, agar, alginate or tyrose, cellulose derivatives, such as hydroxyalkylcellulose having a C1-C4 alkyl group, particularly hydroxyethylcellulose, preferably those bearing the Natrosol® trademark of Herkules Incorporated, particularly preferably Natrosol® 250 (CAS-Nr. 9004-62-0), carboxymethylcellulose or hydroxycarboxymethylcellulose, starch, preferably National 465, Purity W or starch B990, in addition to relatively high molecular weight polyethylene glycol fatty acid mono- and diesters, fatty alcohols, monoglycerides and fatty acids.

[0073] Other thickeners include polyacrylates, crosslinked polyacrylic acids and their derivatives, such as Tinovis® CD and Rheocare® TTA (commercially available from BASF), Carbopol® (commercially available from Lubrizol), Ultrez® (commercially available from Lubrizol), Luvigel® EM (commercially available from BASF), Cosmedia® SP (commercially available from BASF), Tinovis® GTCUP (commercially available from BASF), Capigel® 98 (commercially available from Seppic), Synthalene® (commercially available from Sigma), Rohm and Aculyn® grades from Haas are also preferred, such as Aculyn® 22 (a copolymer of acrylate and ethoxylated methacrylic acid having a stearyl group (20 ethylene oxide (EO) units)) and Aculyn® 28 (a copolymer of acrylate and ethoxylated methacrylic acid having a behenyl group (25 EO units)).

[0074] As thickeners, other suitable options include, for example, aerosil grade (hydrophilic silica), polyacrylamide, polyvinyl alcohol and polyvinylpyrrolidone, ethoxylated fatty acid glycerides, esters of fatty acids and polyols such as pentaerythritol or trimethylolpropane, fatty alcohol ethoxylates or alkyl oligoglucosides with a narrow homologous distribution, as well as electrolytes such as sodium chloride and ammonium chloride.

[0075] Depending on its type, the thickening agent may be present in amounts commonly used in the art. Those skilled in the art will be able to select a suitable thickening agent and amount for the present invention.

[0076] In connection with the present invention, the thickening agent may be present in an amount of 0.01 to 3% by weight, preferably 0.02 to 2.0% by weight, and more preferably 0.04 to 1.5% by weight, based on the total weight of the two-phase cosmetic composition.

[0077] Preservatives The two-phase cosmetic composition according to the present invention may, advantageously, contain one or more preservatives.

[0078] Advantageous preservatives in connection with the present invention include, for example, formaldehyde donors (e.g., DMDM ​​hydantoin, for example, commercially available under the trade name Glydant® (commercially available from Lonza)), propyl iodide butylcarbamate (e.g., Glycacil-L®, Glycacil-S® (commercially available from Lonza), Dekaben® LMB (commercially available from Jan Dekker)), parabens (alkyl p-hydroxybenzoate esters, for example, methyl, ethyl, propyl and / or butylparaben), dehydroacetic acid (Euxyl® K702 (commercially available from Schuelke & Mayr)), phenoxyethanol, ethanol, benzoic acid, or combinations thereof. So-called preservative adjuncts, such as octoxyglycerol and wild soybean, can also be advantageously used.

[0079] Preservatives or preservative adjuncts commonly used in cosmetics, such as dibromodicyabutane (2-bromo-2-bromomethylglutalodinitrile), phenoxyethanol, 3-iodo-2-propynyl butylcarbamate, 2-bromo-2-nitropropane-1,3-diol, imidazolidinyl urea, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-chloroacetamide, benzyl alcohol, salicylic acid, and salicylates are also advantageous.

[0080] The preservative can be present in an amount of 0.01 to 5% by weight, preferably 0.1 to 2% by weight, and more preferably 0.2 to 1% by weight, based on the total weight of the two-phase cosmetic composition.

[0081] perfume oil If appropriate, the two-phase cosmetic composition according to the present invention may include a fragrance oil. Examples of fragrance oils include mixtures of natural and synthetic fragrances. Natural fragrances include flower extracts (lily, lavender, rose, jasmine, neroli, ylang-ylang), stem and leaf extracts (geranium, patchouli, petitgrain), fruit extracts (anise, coriander, fennel, juniper), peel extracts (bergamot, lemon, orange), root extracts (nutmeg, angelica, celery, cardamom, woody spicebush, iris, calamus), wood extracts (pine, sandalwood, guaiac wood, cedarwood, rosewood), herb and grass extracts (tarragon, lemongrass, sage, thyme), needle-leaf and twig extracts (spruce, fir, pine, montana pine), and resin and balsam extracts (galbanum, elemi, benzoin, myrrh, frankincense, opoponax). Animal-derived ingredients, such as civet and castorium, are also suitable. Typical synthetic fragrance compounds are ester, ether, aldehyde, ketone, alcohol, and hydrocarbon type products. Examples of ester-type fragrance compounds include benzyl acetate, phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbin acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, methylphenylglycine ethyl, allyl cyclohexylpropionate, styraryl propionate, and benzyl salicylate. Examples of ethers include benzyl ethyl ether; examples of aldehydes include linear alcanals having 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial, and burgeonal; examples of ketones include ionone, cc-isomethyl ion, and methylcedyl ketone; examples of alcohols include anethole, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol, and terpineol; and examples of hydrocarbons include mainly terpenes and balsams. However, it is preferable to use a mixture of different fragrances that together create a pleasant scent note.Essential oils with lower volatility are mostly used as fragrance components. For example, sage oil, chamomile oil, clove oil, lemon balm oil, peppermint oil, cinnamon oil, lime blossom oil, juniper berry oil, vetiver oil, frankincense oil, ferula galvaniflua resin oil, labdanum oil, and lavandula hybrida oil are also suitable as perfume oils. It is preferable to use bergamot oil, dihydromyrcenol, lilial, liral, citronellol, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzylacetone, cyclamenaldehyde, linalool, Boisambrene® Forte, ambroxan, indole, hedione, sandelice, lemon oil, mandarin oil, orange oil, allyl amylglycolate, cyclobathal, lavandin oil, clary sage oil, β-damascone, geranium bourbon, cyclohexyl salicylate, Vertofix® Coeur, iso E-Super®, Fixolide® NP, evelynyl, iraldine gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romira, ilotyl, and floramat individually or in mixtures.

[0082] The fragrance oil can be present in a conventional amount in the two-phase cosmetic composition.

[0083] Needless to say, the two-phase cosmetic composition of the present invention must be cosmetically or dermatologically acceptable; that is, the media it contains must be non-toxic and physiologically acceptable, and it must be applicable to the skin. In relation to the purposes of the present invention, the expression "cosmetically acceptable" means a composition having a pleasant appearance, smell, feel, and / or taste.

[0084] In a second aspect, the present invention provides a method for preparing a two-phase cosmetic composition according to the present invention, the method comprising mixing the components of the two-phase cosmetic composition.

[0085] The two-phase cosmetic composition according to the present invention is prepared by combining a premixture of the components of the oily phase and the aqueous phase in a predetermined ratio, excluding the fatty alcohol polyoxyalkylene ether and the surfactant (if used), and then adding the fatty alcohol polyoxyalkylene ether and the surfactant (if used) to form a two-phase composition. Alternatively, the components of the two-phase cosmetic composition are added together or sequentially while stirring to promote the separation of each raw material into the appropriate phase.

[0086] In a third aspect, the present invention provides a two-phase cosmetic composition containing a beauty active ingredient that is stably present in the composition.

[0087] Active ingredients It has been found that the two-phase cosmetic composition according to the present invention can homogeneously mix active ingredients having various solubility levels.

[0088] According to the present invention, in particular, when the two-phase cosmetic composition according to the present invention is useful for treating and preventing symptoms of natural aging and / or exogenous aging, and in addition, for treating and preventing the harmful effects of ultraviolet radiation on the skin, the active ingredient can be advantageously selected from the group consisting of NO synthase inhibitors. A preferred NO synthase inhibitor is nitroarginine.

[0089] Furthermore, the active ingredients are advantageously selected from the group consisting of catechins and catechin bile acid esters, and plants or parts of plants containing catechins or catechin bile acid esters, such as aqueous or organic extracts of the leaves of plants of the Theaceae family, particularly the tea plant (Camellia sinensis) (green tea). Representative components of these (e.g., polyphenols or catechins, caffeine, vitamins, sugars, minerals, amino acids, lipids) are particularly advantageous.

[0090] Catechins are a group of compounds considered to be hydrogenated flavones or anthocyanidins, and these are derivatives of "catechins" (catechol, 3,3',4',5,7-flavanpentaol, 2-(3,4-dihydroxyphenyl)chroman-3,5,7-triol). Epicatechin ((2R,3R)-3,3',4',5,7-flavanpentaol) is also a favorable active ingredient within the scope related to the present invention.

[0091] Plant extracts containing catechins, particularly green tea extracts, such as those from Camellia species, more specifically, the tea varieties Camellia sinenis, Assam tea (Camellia assamica), Camellia taliensis, and Camellia inawadiensis, as well as leaf extracts from hybrids of these with, for example, Camellia japonica.

[0092] As active ingredients, polyphenols and catechins selected from the group consisting of (-)catechin, (+)-catechin, (-)-catechin gallate, (-)-gallocatechin gallate, (+)-epicatechin, (-)-epicatechin, (-)-epicatechin gallate, (-)-epigallocatechin, and (-)-epigallocatechin gallate are also preferred.

[0093] Flavones and their derivatives (often collectively referred to as "flavones") are also advantageous active ingredients within the scope relevant to the present invention.

[0094] Further preferred active ingredients include sericoside, pyridoxol, vitamin K, biotin, and aroma substances, bisabolol (bisabolol rac. (commercially available from BASF)), tocopherol (Covi-ox® T-50 C (commercially available from BASF)), retinyl palmitate (Vitamin A-Palmitate Care (commercially available from BASF)), retinol (Retinol 50 C (commercially available from BASF)), and Schisandryl® LS 9905 fruit extract (commercially available from BASF).

[0095] Furthermore, hydrophilic active ingredients, particularly those listed below: Alpha-hydroxy acids such as lactic acid or salicylic acid and their salts, e.g., sodium lactate, calcium lactate, TEA lactate, urea, allantoin, serine, sorbitol, milk protein, panthenol, chitosan, glycerin and glyceryl glucoside (e.g., Hydagen® Aquaporin (commercially available from BASF)) or combinations thereof. The active ingredient selected from the group consisting of these can also be very advantageous.

[0096] Needless to say, the list of specified active ingredients and combinations of active ingredients that can be used in the two-phase cosmetic composition according to the present invention is not intended to be limiting. The active ingredients can be used individually or in any combination of them.

[0097] This active ingredient may be present in the two-phase composition of the present invention in amounts commonly used in the art, depending on its type. Those skilled in the art will be able to select an appropriate active ingredient and amount for the present invention.

[0098] The specified active ingredients and further active ingredients that can be used in the two-phase cosmetic composition according to the present invention are described on pages 12-17 of German Patent Application Publication No. 10318526A1, which is incorporated by reference in its entirety at present.

[0099] Additional beneficial ingredients The compositions of the present invention may further contain one or more beneficial ingredients that can provide a favorable and / or beneficial effect to the substrate being cared for, for example, the skin. Those skilled in the art can select such optional ingredients appropriate for the intended application, in accordance with the general knowledge of the art of cosmetic composition formulation and the vast amount of literature relating thereto.

[0100] In one embodiment, the composition of the present invention contains one or more beneficial components, for example, emollients, moisturizers, conditioners, skin conditioners, for example, vitamins or derivatives thereof, for example, thiamine, nicotinic acid, biotin, pantothenic acid, choline, riboflavin, vitamin B6, vitamin B12, vitamin B complex such as pyridoxine, inositol, carnitine, vitamins A, C, D, E, K and derivatives thereof, for example, vitamin A palmitate and provitamins, for example, panthenol (provitamin B5), panthenyl triacetate and mixtures thereof; antioxidants; free radical scavengers; natural or synthetic abrasives; dyes; hair dyes; bleaches; hair decolorizers; UV absorbers, for example, benzophenone, bornelon, PABA (para-aminobenzoic acid), butyl PABA, cinnamidopropyltrimethylammonium chloride, disodium distylylbiphenyl disulfonate, potassium methoxycinnamate; anti-UV agents. Agents, e.g., butyl methoxydibenzoylmethane, octyl methoxycinnamate, oxybenzone, octocrylene, octyl salicylate, phenylbenzimidazole sulfonic acid, ethyl hydroxypropylaminobenzoate, menthyl anthranilate, aminobenzoic acid, cinoxate, diethanolamine methoxycinnamate, glyceryl aminobenzoate, titanium dioxide, zinc oxide, oxybenzone, dimethyl PABA octyl (padimate O), red petrolatum; antimicrobial agents; antibacterial agents, e.g., bacitracin, erythromycin, triclosan, neomycin, tetracycline, chlortetracycline, benzethonium chloride, phenol, parachlorometaxylenol (PCMX), triclocarban (TCC), chlorhexidine gluconate (CHG), zinc pyrithione, selenium sulfide; antifungal agents; melanin regulators; tanning accelerators;Pigmentation inhibitors, such as retinoids, such as retinol; kojic acid and its derivatives, such as kojic dipalmitate; hydroquinone and its derivatives, such as arbutin; transexamic acid; vitamins, such as niacin; vitamin C and its derivatives; azelaic acid; placertia; extracts of licorice, chamomile and green tea (among these, retinol, kojic acid and hydroquinone are preferred); whitening agents, such as hydroquinone, catechol and its derivatives; ascorbic acid and its derivatives; skin colorants, such as dihydroxyacetone; lipid control agents; weight-reducing agents; anti-acne agents; anti-seborrheic agents; anti-aging agents; anti-wrinkle agents; keratolytic agents; anti-inflammatory agents; anti-acne agents. For example, tretinoin, isotretinoin, motoretinide, adapalene, tazarotene, azelaic acid, retinol, salicylic acid, benzoyl peroxide, resorcinol, antibiotics such as tetracycline and its isomers, erythromycin, anti-inflammatory agents such as ibuprofen, naproxen, hetoprofen, plant extracts such as alder (Alnus) plants, Arnica plants, Artemisia capillaris Capillaris, roots of plants of the genus Asasarum, plants of the genus Calendula, chamomile, nidium, comfrey, fennel, galla rhois, hawthorn, plants of the genus Houttuynia, plants of the genus Hypericum, jujube, kiwi, licorice, plants of the genus Magnolia, olive, peppermint, plants of the genus Philodendron, plants of the genus Salvia, sasa albomarginata, imidazole, such as ketoconazole and elubiol; refreshing agent; cicatrizing agent; vascular protective agent;Agents for suppressing dandruff (anti-dandruff agents), seborrheic dermatitis or psoriasis, such as pyrithione salts like zinc pyrithione formed from heavy metals such as zinc, tin, cadmium, magnesium, aluminum, sodium, and zirconium, shale oil and its derivatives, such as sulfonated shale oil, selenium sulfide, sulfur, salicylic acid, coal tar, povidone-iodine, imidazole, such as ketoconazole, dichlorophenylimidazolodioxalane (dichlorophenyl imidazolodioxalan), clotrimazole, itraconazole, miconazole, crimbazole, thioconazole, sulconazole, butoconazole, fluconazole, miconazolenitrite, and possible stereoisomers and derivatives thereof, such as anthraline, piroctone olamine (Octopirox), selenium sulfide, cyclopirox olamine, antipsoriatic agents, such as vitamin D analogs, such as calcium The following are further included: potriol, calcitriol and tacaleitrol; vitamin A analogs, such as vitamin A palmitate and other vitamin A esters; retinoids, retinol and retinoic acid; corticosteroids, such as hydrocortisone, clobetazone, butyrate, and clobetasol propionate; antiperspirants or deodorants, such as chlorohydroxyaluminum and aluminum zirconium chlorohydrate; immunomodulators; nourishing agents; depilatory agents, such as calcium thioglycolate, magnesium thioglycolate, potassium thioglycolate, and strontium thioglycolate; anti-depilatory agents; reducing agents for permanent wave treatment; reflectants, such as mica, alumina, calcium silicate, glycol dioleate, glycol distearate, silica, and sodium magnesium fluorosilicate; essential oils, and fragrances.

[0101] The pH of the composition of the present invention can be adjusted by conventional methods to, for example, 4.0 to 7.0, preferably 4.5 to 6.5, and more preferably 5.0 to 6.0.

[0102] In a fourth aspect, the present invention provides the use of a two-phase cosmetic composition according to the present invention as a delivery system for cosmetic active ingredients.

[0103] In the two-phase cosmetic composition according to the present invention, at least one of the oily phase and the aqueous phase contains an active ingredient that exhibits cosmetic activity on the skin.

[0104] It should be understood that, with respect to these active ingredients, the amounts of the preferred active ingredients in the composition are the same as those described above in this specification.

[0105] In a fifth aspect, the present invention provides a method for applying a two-phase cosmetic composition containing a cosmetic active ingredient according to the present invention, comprising shaking the composition to form a macroscopically homogeneous mixture, and applying the mixture to the skin.

[0106] The two-phase cosmetic composition according to the present invention has been found to be able to simultaneously deliver aqueous and oily components while providing the skin with a very soft and refreshing feel. The two-phase cosmetic composition according to the present invention can deliver the components of each phase while reducing the amount of oily components and retaining their respective advantages. The two-phase cosmetic composition according to the present invention has a reduced content of surfactants, which can cause unintended adverse effects on the skin and problems of bioaccumulation. [Examples]

[0107] The embodiments of the present invention will be explained more fully by the following examples, but these are provided to illustrate specific embodiments of the present invention and should not be interpreted as limiting the present invention.

[0108] The following materials and evaluation methods were used in the examples.

[0109] material: The materials shown in Table 1 were used.

[0110] [Table 1]

[0111] Preparation of two-phase cosmetic compositions: The two-phase cosmetic composition is prepared as follows. The weight percentages of the materials are shown in the table below. 1. The components of the oily phase are added to the components of the aqueous phase while stirring at a temperature of 75-80°C, and then homogenized for several minutes to form a uniform solution. 2. After homogenization, cool to room temperature while stirring slowly, and add the components other than those of the oily and aqueous phases to the solution and stir until homogenized.

[0112] Phase separation evaluation method: The transparency of the aqueous phase of a two-phase cosmetic composition can be confirmed visually.

[0113] The results are shown in Tables 2-5 and Figures 1-3. In Tables 2-5, Phase A contains the components of the aqueous phase, Phase B contains the components of the oily phase, Phase C contains fatty alcohol polyoxyalkylene ether and surfactant, and Phase D contains the active ingredient.

[0114] [Table 2]

[0115] [Table 3]

[0116] [Table 4]

[0117] [Table 5]

[0118] As can be seen from Tables 2-5 and Figures 1-3, in Examples 1-14 of the present invention, the two separated phases exist as an emulsion phase and a transparent aqueous phase, and when left standing, the emulsion phase floats on top of the transparent aqueous phase, forming a clear interface between the two phases. On the other hand, in Comparative Examples 1-3, water and oil separate without the appearance of a cotton-like precipitate in the aqueous phase or without the formation of a two-phase cosmetic composition containing an emulsion phase and a transparent aqueous phase.

[0119] While embodiments and examples of the Disclosure have been described above, those skilled in the art should understand that these are for illustrative purposes only and are not intended to limit the scope of the Disclosure. The scope of the Disclosure is defined in the appended claims. Those skilled in the art can make various modifications, equivalent substitutions or improvements to these embodiments without departing from the scope and spirit of the Disclosure, and these modifications, equivalent substitutions or improvements are also included within the scope of the Disclosure. The present invention includes, for example, the following embodiments. [Section 1] Formula RO-(R') n H(wherein R is saturated or unsaturated straight or branched C8~C) 22 Hydrocarbon chains or saturated or unsaturated straight or branched C8-C 22 A mixture of hydrocarbon chains, preferably saturated or unsaturated straight or branched carbon chains. 10 ~C 20 Hydrocarbon chains or saturated or unsaturated straight or branched carbon 10 ~C 20 A mixture of hydrocarbon chains, more preferably saturated or unsaturated straight or branched carbon 12 ~C 18 Hydrocarbon chains or saturated or unsaturated straight or branched carbon 12 ~C 18A two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group and an oxypropylene group and combinations thereof, preferably an oxyethylene group, and n is 2 to 30, preferably 10 to 30, more preferably 15 to 30), wherein two separate phases exist as an emulsion phase and a clear aqueous phase, and preferably the fatty alcohol polyoxyalkylene ether is present in an amount of 0.001 to 1.0% by weight, preferably 0.005 to 0.2% by weight, more preferably 0.01 to 0.15% by weight, and even more preferably 0.03 to 0.1% by weight, based on the total weight of the two-phase cosmetic composition. [Section 2] The fatty alcohol polyoxyalkylene ethers consist of a series of ceteares such as ceteares-2 to ceteares-30, preferably ceteares-10, ceteares-20, or ceteares-30, more preferably ceteares-20 or ceteares-30; a series of ceteths such as ceteth-2 to ceteth-30, preferably ceteth-10, ceteth-20, or ceteth-30, more preferably ceteth-20 or ceteth-30; a series of steareths such as steareth-2 to steareth-30, preferably steareth-10, steareth-20, or steareth-30, more preferably steareth-20 or steareth-30; and a series of laureths such as laureth-2 to laureth-30, preferably laureth-10, laureth-20, or laureth-30, more preferably laureth-20 or laureth-30. The two-phase cosmetic composition according to item 1, comprising: a fatty alcohol polyoxyethylene ether selected from; a fatty alcohol polyoxypropylene ether selected from the group consisting of PPG-10 cetyl ether, PPG-28 cetyl ether, PPG-30 cetyl ether and PPG-11 stearyl ether; and a fatty alcohol polyoxyethylene polyoxypropylene ether selected from the group consisting of PPG-4 ceteareth-12, PPG-4 ceteareth-20, PPG-10 ceteareth-20, PPG-4 ceteth-1, PPG-4 ceteth-5, PPG-4 ceteth-10, PPG-4 deceth-4, PPG-5 ceteth-20, PPG-8 ceteth-1, PPG-8 ceteth-2, PPG-8 ceteth-5, PPG-8 ceteth-10, PPG-8 ceteth-20 and PPG-9 steareth-3. [Section 3] The two-phase cosmetic composition according to claim 1 or 2, further comprising an oil component in the emulsion phase, wherein the oil component comprises hydrocarbons and hydrocarbon derivatives, glycerides, ethers, esters, carbonate esters, fatty alcohols, fatty acids, fatty acid esters, fatty alcohol ethers, vegetable oils, animal oils, silicone oils, mineral oils (paraffin oils), and combinations thereof. [Section 4] The fatty alcohol is selected from the group consisting of saturated or unsaturated branched or unbranched alcohols having 6 to 22, preferably 10 to 20, more preferably 12 to 18 carbon atoms, such as Guerbet alcohols such as 2-butyloctanol, 2-hexyldecanol, a mixture of 2-butyloctanol and 2-hexyldecanol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, octyldodecanol, preferably cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, octyldodecanol, and more preferably cetearyl alcohol, as described in item 3, for the two-phase cosmetic composition. [Section 5] The two-phase cosmetic composition according to item 3 or 4, wherein the oil component is present in an amount of 1 to 20% by weight, preferably 2 to 18% by weight, more preferably 3 to 16% by weight, and even more preferably 3 to 12% by weight. [Section 6] The two-phase cosmetic composition according to item 4, wherein the weight ratio of the fatty alcohol polyoxyalkylene ether to the fatty alcohol is 1:10 to 10:1, preferably 1:8 to 5:1, and more preferably 1:5 to 1:1. [Section 7] A two-phase cosmetic composition according to any one of claims 1 to 6, further comprising at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants. [Section 8] The two-phase cosmetic composition according to claim 7, wherein the anionic surfactant includes sulfate-type anionic surfactants, amino acid-type anionic surfactants, sulfosuccinate-type anionic surfactants, and sulfonated fatty acid-type and / or dialt-type anionic surfactants. [Section 9] The sulfate-type anionic surfactant comprises ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, sodium monoglyceride sulfate of laurate, sodium lauryl sulfate, sodium laureth sulfate, potassium lauryl sulfate, potassium laureth sulfate, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauroyl sulfate, ammonium cetearyl sulfate, sodium cetearyl sulfate, potassium cetearyl sulfate, and combinations thereof, preferably ammonium laureth sulfate, sodium laureth sulfate, potassium laureth sulfate, ammonium cetearyl sulfate, sodium cetearyl sulfate, and potassium cetearyl sulfate, more preferably sodium laureth sulfate and sodium cetearyl sulfate, in the two-phase cosmetic composition according to item 8. [Section 10] The two-phase cosmetic composition according to claim 8, wherein the amino acid-type anionic surfactant comprises acyl glutamate, acyl taurine salt, acyl glycine salt, acyl alanine salt, acyl sarcosine salt, and acyl aspartate salt. [Section 11] The two-phase cosmetic composition according to item 8, wherein the sulfosuccinate-type anionic surfactant comprises sodium dioctyl sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, disodium cetearyl sulfosuccinate, disodium undecylenamide MEA sulfosuccinate, and disodium PEG-5 lauryl citrate sulfosuccinate, preferably disodium lauryl sulfosuccinate and disodium cetearyl sulfosuccinate, more preferably disodium cetearyl sulfosuccinate. [Section 12] The sulfonated fatty acid type and / or dichloride type anionic surfactant is defined by formula (1): R 0CH(SO3M 1 )COOM 2 (1) (In the formula, R 0 This refers to saturated or unsaturated linear or branched C8-C 16 It is a hydrocarbon chain, M 1 and M 2 The two-phase cosmetic composition according to item 8, wherein ( is independently a compound of H, Li, Na, K, Ca / 2, Mg / 2, ammonium, or alkanolamine). [Section 13] The two-phase cosmetic composition according to any one of claims 7 to 12, wherein the anionic surfactant is present in an amount of 0.001 to 5% by weight, preferably 0.005 to 1% by weight, more preferably 0.006 to 0.5% by weight, and most preferably 0.01 to 0.1% by weight, based on the total weight of the two-phase cosmetic composition. [Section 14] The aforementioned amphoteric surfactant comprises sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate, sodium acylamphopropionate, and sodium N-coconut fatty acid amide ethyl N-hydroxyethylglycine salt; N-alkyl amino acids, such as aminopropylalkyl glutamide, alkylaminopropionic acid, sodium alkylimidodipropionate, and disodium lauroamphodiacetate; alkyl betaine, alkylamidopropyl betaine, alkyl sulfobetaine, alkyl glycinate, alkyl carboxyglycinate, alkylamphoacetate or -propionate, alkylamphodiacetate or dipropionate, preferably cocodimethylsulfopropyl betaine, lauryl betaine, cocamidopropyl betaine, or sodium cocoamphopropionate, more preferably cocamidopropyl betaine, in the two-phase cosmetic composition according to any one of claims 7 to 13. [Section 15] The two-phase cosmetic composition according to any one of claims 7 to 14, wherein the amphoteric surfactant is present in an amount of 0.001 to 5% by weight, preferably 0.005 to 1% by weight, more preferably 0.006 to 0.5% by weight, and most preferably 0.01 to 0.1% by weight. [Section 16] A two-phase cosmetic composition according to any one of claims 1 to 15, further comprising at least one cosmetic active ingredient. [Section 17] A method for preparing a two-phase cosmetic composition according to any one of items 1 to 16, comprising mixing the components of the two-phase cosmetic composition. [Section 18] Use of a two-phase cosmetic composition described in any one of items 1 to 16 as a delivery system for cosmetic active ingredients. [Section 19] A method for applying a two-phase cosmetic composition described in any one of paragraphs 1 to 16, comprising: shaking the composition to form a macroscopically homogeneous mixture; and applying the mixture to the skin.

Claims

1. Formula RO-(R') ｎ H (wherein R is saturated or unsaturated linear or branched C) ８ ~C ２２ Hydrocarbon chains or saturated or unsaturated straight or branched carbon ８ ~C ２２ A two-phase cosmetic composition comprising a fatty alcohol polyoxyalkylene ether (a mixture of hydrocarbon chains, where R' is selected from the group consisting of an oxyethylene group and an oxypropylene group and combinations thereof, and n is 2 to 30), wherein two separate phases exist as an emulsion phase and a clear aqueous phase, the composition further comprising an oil component containing a fatty alcohol in the emulsion phase, the fatty alcohol being selected from the group consisting of saturated or unsaturated branched or unbranched alcohols having 6 to 22 carbon atoms, and the weight ratio of the fatty alcohol polyoxyalkylene ether to the fatty alcohol being 1:10 to 10:

1.

2. The fatty alcohol polyoxyalkylene ether is a fatty alcohol polyoxyethylene ether selected from the group consisting of ceteareth selected from ceteareth-2 to ceteareth-30; ceteth selected from ceteth-2 to ceteth-30; steareth selected from steareth-2 to steareth-30; and laureth selected from laureth-2 to laureth-30; or a fatty alcohol polyoxyethylene ether selected from the group consisting of PPG-10 cetyl ether, PPG-28 cetyl ether, PPG-30 cetyl ether, and PPG-11 stearyl ether. The two-phase cosmetic composition according to claim 1, comprising a propylene ether and a fatty alcohol polyoxyethylene-polyoxypropylene ether selected from the group consisting of PPG-4 ceteareth-12, PPG-4 ceteareth-20, PPG-10 ceteareth-20, PPG-4 ceteth-1, PPG-4 ceteth-5, PPG-4 ceteth-10, PPG-4 deceth-4, PPG-5 ceteth-20, PPG-8 ceteth-1, PPG-8 ceteth-2, PPG-8 ceteth-5, PPG-8 ceteth-10, PPG-8 ceteth-20, and PPG-9 steareth-3.

3. The two-phase cosmetic composition according to claim 1 or 2, wherein the oil component comprises hydrocarbons and hydrocarbon derivatives, glycerides, ethers, esters, carbonate esters, fatty acids, fatty acid esters, fatty alcohol ethers, vegetable oils, animal oils, silicone oils, mineral oils (paraffin oils), and combinations thereof.

4. The two-phase cosmetic composition according to any one of claims 1 to 3, wherein the fatty alcohol is selected from the group consisting of saturated or unsaturated branched or unbranched alcohols having 10 to 20 carbon atoms.

5. The two-phase cosmetic composition according to any one of claims 1 to 4, wherein the oil component is present in an amount of 1 to 20% by weight.

6. The two-phase cosmetic composition according to any one of claims 1 to 5, wherein the weight ratio of the fatty alcohol polyoxyalkylene ether to the fatty alcohol is 1:8 to 5:

1.

7. A two-phase cosmetic composition according to any one of claims 1 to 6, further comprising at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants.

8. The two-phase cosmetic composition according to claim 7, wherein the anionic surfactant includes sulfate-type anionic surfactants, amino acid-type anionic surfactants, sulfosuccinate-type anionic surfactants, and sulfonated fatty acid-type and / or dialt-type anionic surfactants.

9. The sulfate-type anionic surfactant includes ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, sodium monoglyceride sulfate of laurate, sodium lauryl sulfate, sodium laureth sulfate, potassium lauryl sulfate, potassium laureth sulfate, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauroyl sulfate, ammonium cetearyl sulfate, sodium cetearyl sulfate, potassium cetearyl sulfate, and combinations thereof, as described in claim 8, for the two-phase cosmetic composition.

10. The two-phase cosmetic composition according to claim 8, wherein the amino acid-type anionic surfactant comprises acyl glutamate, acyl taurine salt, acyl glycine salt, acyl alanine salt, acyl sarcosine salt, and acyl aspartate salt.

11. The two-phase cosmetic composition according to claim 8, wherein the sulfosuccinate-type anionic surfactant comprises sodium dioctyl sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, disodium cetearyl sulfosuccinate, disodium undecylenamide MEA sulfosuccinate, and disodium PEG-5 lauryl citrate sulfosuccinate.

12. The sulfonated fatty acid type and / or dialt type anionic surfactant is defined by formula (1): R ０ CH(SO ３ M １ )COOM ２ (1) (In the formula, R ０ This refers to saturated or unsaturated linear or branched C ８ ~C １６ It is a hydrocarbon chain, M １ and M ２ The two-phase cosmetic composition according to claim 8, wherein ( is independently a compound of H, Li, Na, K, Ca / 2, Mg / 2, ammonium, or an alkanolamine).

13. The two-phase cosmetic composition according to any one of claims 7 to 12, wherein the anionic surfactant is present in an amount of 0.001 to 5% by weight based on the total weight of the two-phase cosmetic composition.

14. The two-phase cosmetic composition according to any one of claims 7 to 13, wherein the amphoteric surfactant comprises sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate, sodium acylamphopropionate, and N-coconut fatty acid amide ethyl N-hydroxyethylglycine sodium salt; N-alkyl amino acids; alkyl betaine, alkylamidopropyl betaine, alkyl sulfobetaine, alkyl glycinate, alkyl carboxyglycinate, alkylamphoacetate or -propionate, alkylamphodiacetate or dipropionate.

15. The two-phase cosmetic composition according to any one of claims 7 to 14, wherein the amphoteric surfactant is present in an amount of 0.001 to 5% by weight.

16. A two-phase cosmetic composition according to any one of claims 1 to 15, further comprising at least one cosmetic active ingredient.

17. A method for preparing a two-phase cosmetic composition according to any one of claims 1 to 16, comprising mixing the constituent components of the two-phase cosmetic composition.

18. A two-phase cosmetic composition according to any one of claims 1 to 16, which is used as a delivery system for a cosmetic active ingredient.

19. A two-phase cosmetic composition according to any one of claims 1 to 16, wherein the composition is shaken to form a macroscopically homogeneous mixture, and the mixture is applied to the skin.

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