JP2010265265A - Multilayered cosmetic composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayered cosmetic composition. <P>SOLUTION: The cosmetic composition includes (1) 20-40 wt.% of a polydimethylsiloxane component having a viscosity of 5-50 cps, (2) 10-35 wt.% of an amphipathic polyether polyol alkylcarboxylic ester component which is an ester of a polyether polyol and an alkylcarboxylic acid, of which the numbers of carbon atoms in the structural unit of the polyether polyol and in the structural unit of the alkylcarboxylic acid are each 6-20, and of which the absolute value of the difference of the number of carbon atoms in between the structural unit of the polyether polyol and the structural unit of the alkylcarboxylic acid is 2 or less, and (3) 25-50 wt.% of a polyol component. The cosmetic composition is used as a make-up removal composition. When the cosmetic composition is shaken until forming a uniform phase on the occasion of use, the makeup-eliminating power and the cleansing power are good; the composition is easily swilled; after the swill, a smooth and soft skin feel remains; and after still standing for a certain fixed time, each layer regains a transparent trilaminar structure. Furthermore, the cosmetic composition is used for a skin care product remaining on the skin surface and is also used for a hair care product which remains on the hair surface, strengthens the luster, and improves the passing of a comb. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a cosmetic composition that separates into two or more layers upon standing and finds wide use in the cosmetic industry, and more particularly to a cosmetic composition as a makeup remover composition.

2. Background Art Two-phase liquid makeup removers are already well established in the body care field, and they exhibit the appearance of a liquid product that is clearly separated into two layers. Such formulations generally contain an aqueous phase and an oil phase, which do not contain surface active ingredients. Therefore, the two phases are immiscible and the absence of emulsifying action forms two separate layers. However, this type of product has many drawbacks. For example, the function of dissolving makeup pigments in which they are colored is fulfilled only by the cleansing action of oils or fats. As a result, this type of product cannot be easily washed away from the skin and can therefore only be wiped off or removed using other cleaning agents. In addition, they consist of a simple two-phase system of oil and water, and are therefore inconvenient in use due to the high rate of phase separation after mixing the phases so that they are uniform. The main reason this kind of product attracts consumers is that it has two layers of different colors in addition to being transparent in appearance, and this feature creates an attractive appearance . From this same point of view, formulations that separate into three transparent layers have been developed as well. Again, the main basis of the formulation is that the aqueous phase is combined with two oil phases that are difficult to mix with each other and have a relatively large density difference. Therefore, in the end, this type of preparation is exactly the same as the two-layer equivalent described above, and it cannot be easily washed away.

  Therefore, there is a continuing need for multiphase makeup remover compositions that are easy to rinse. Furthermore, it is desirable that the make-up remover composition that can be easily rinsed is separated into three layers upon standing, each layer is transparent before coloring, and has a phase separation rate convenient for use.

  Accordingly, it is an object of the present invention to provide a cosmetic composition that can be washed away from the skin, and this easily rinsed composition should more desirably be suitable for removal of makeup agents. And should be separated into three layers naturally by simply standing still. Advantages are obtained by the fact that the pre-colored layer is transparent and has a phase separation rate suitable for use.

DESCRIPTION OF THE INVENTION Surprisingly, the objectives indicated above, based on the total weight of the composition, are:
(1) Using a Brookfield rotational viscometer, spindle no. 20 to 40 wt% of at least one polydimethylsiloxane having a viscosity of 5 to 50 cps measured at 25 ° C. with a rotation speed of 100 rpm using 2;
(2) It is an ester of a polyether type polyol and an alkyl carboxylic acid, the number of carbon atoms in both the structural unit of the polyether type polyol and the structural unit of the alkyl carboxylic acid is 6 to 20, 10 to 35% by weight of at least one amphiphilic polyether polyol alkyl carboxylic acid ester, in which the absolute value of the difference between the number of carbon atoms in the structural unit and the number of carbon atoms in the structural unit of the alkylcarboxylic acid is 2 or less And (3) 25-50% by weight of at least one polyol
It has been found to be achieved by a cosmetic composition comprising

  In this case, the above-mentioned viscosity relates to the whole component (1).

  The cosmetic composition of the present invention separates into three layers upon standing, and its unique feature is that every layer is transparent; when used after shaking until the phase is uniform, it is particularly effective for makeup agents. The ability to show good cleansing power and the cosmetic composition itself is removed by washing is good due to the use of an amphiphilic polyether polyol alkyl carboxylic acid ester that exhibits a surfactant-like action; After removing the composition of the present invention by washing, a soft and smooth skin feel remains; after standing for 2 to 60 minutes, it is to regain the three-layer structure.

  The cosmetic composition according to the present invention is a thermodynamically stable layered product, which is natural within 2 to 60 minutes when the colorless product is allowed to stand after shaking until the phase is uniform. Each layer is transparent, and the translucency of each layer is preferably 80% or more when measured for a layer having a thickness of 1 cm at 425 nm, 100% translucency represents the reference water.

  More preferably, the cosmetic composition according to the present invention is a three-layer composition exhibiting a suitable phase separation rate, which is obtained by shaking the cosmetic composition according to the present invention until the phases are uniform. It means to take a three-layer structure having a clear boundary surface after standing for -20 minutes.

  According to the present invention, the cosmetic composition has a viscosity of 5 to 50 cps, preferably 10 to 20 cps (Brookfield rotational viscometer, spindle No. 2, rotation speed 100 rpm, measured at 25 ° C.). Contains ingredients. The polydimethylsiloxane included in the polydimethylsiloxane component is a linear polydimethylsiloxane, an oligomer having a silicon-oxygen bond (Si-O) as the main chain, and a methyl group is directly bonded to the silicon atom. It is a thing. This polydimethylsiloxane has a relatively low molecular weight and a relatively low viscosity.

  The linear polydimethylsiloxane in the context of the present invention is, for example, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane and the like.

  In the cosmetic composition according to the present invention, since the specific gravity of the polydimethylsiloxane component is relatively low, it generally appears as the uppermost layer. The lower the molecular weight of polydimethylsiloxane, the lower its specific gravity and viscosity and the higher the phase separation rate. As a result, the desired phase separation rate can be obtained by adjusting the viscosity of polydimethylsiloxane. The use of polydimethylsiloxane with a viscosity above 350 cps is not suitable because of its density and viscosity, which makes it difficult to phase separate from other components. Furthermore, the use of volatile polydimethylsiloxanes such as, for example, linear polydimethylsiloxanes with a viscosity of less than 2 cps is not suitable because their volatilization rate is too high. As a result, only a small amount of polydimethylsiloxane remains in the system, which also results in extremely low phase separation rates of the system, for example stable phase separation even after 24 hours. Cannot be achieved.

  With respect to the present invention, the individual viscosity of the polydimethylsiloxane present in the polydimethylsiloxane component for the purpose of achieving an acceptable phase separation rate is usually 5 to 150 cps, preferably 10 to 50 cps, provided that The viscosity of the mixture of all these polydimethylsiloxanes forming the polydimethylsiloxane component (1) is 5 to 50 cps, preferably 10 to 20 cps.

  In the case of the present invention, it is of course possible to use one kind of polydimethylsiloxane or two or more kinds of polydimethylsiloxane, but in the latter case, all such polydimethylsiloxanes are mixed. The viscosity of the resulting mixture is 5 to 50 cps, preferably 10 to 20 cps. When two or more polydimethylsiloxanes are used in the present invention, they should be mixed even if the viscosity of one polydimethylsiloxane or two or more polydimethylsiloxanes exceeds the range of 5 to 50 cps. It will be apparent to those skilled in the art that an overall viscosity of 5 to 50 cps, preferably 10 to 20 cps can be used. Preferably, the individual polydimethylsiloxanes used all have a viscosity of 5 to 50 cps, preferably 10 to 20 cps.

  The polydimethylsiloxane component is in particular sold under the trade names DC200 and DC225 from Dow Corning Company or under the trade names ABIL® 20 and ABIL® 50 from EVONIK Goldschmidt GmbH. It may be a product.

  The polydimethylsiloxane component in the present invention may be identified as dimethicone or methyl silicone oil. These are synonymous and can be used interchangeably.

  In terms of cleansing power and phase separation effect, the amount of the polydimethylsiloxane component relative to the total weight of the cosmetic composition according to the present invention is usually 20-40% by weight, preferably 25-35% by weight.

  A further important component of the cosmetic composition according to the present invention is an amphiphilic polyether polyol alkyl carboxylic acid ester, which is an ester of a polyether type polyol and an alkyl carboxylic acid, and of the polyether type polyol. The structural unit and the alkylcarboxylic acid structural unit both have 6 to 20 carbon atoms, and the absolute value of the difference in the number of carbon atoms in the polyether polyol structural unit and the alkylcarboxylic acid structural unit is 2 or less. Is. The polyether type polyol preferably has a degree of polymerization of 2 to 8, a polyether polyol obtained by condensing glycerol, a polyoxyethylene polyol obtained by condensing ethylene oxide, and / or propylene oxide. Polyoxypropylene polyols obtained by the process, and the alkylcarboxylic acid is preferably a fatty acid having 6 to 20 carbon atoms, more preferably a fatty acid having 6 to 16 carbon atoms, such as hexane. Acid, octanoic acid, decanoic acid, lauric acid, tetradecanoic acid, hexanedecanoic acid and the like. In a preferred embodiment, the amphiphilic polyether polyol alkyl carboxylic acid ester comprises a polyglycerol alkyl carboxylic acid ester and an alkyl carboxylic acid ester of polyoxyethylene.

  Preferred polyglycerol alkyl carboxylic acid esters are esters of polyglycerol and fatty acids, more preferably esters of polyglycerol having an average degree of polymerization of 3 to 5 and fatty acids having 8 to 16, preferably 8 to 12 carbon atoms. And the absolute value of the difference in the number of carbon atoms between the structural unit of polyglycerol and the structural unit of fatty acid is 2 or less. Examples of such esters include, for example, polyglyceryl-3 decanoate (TEGO® SOFT PC31), polyglyceryl-4 decanoate (TEGO® SOFT PC41), octanoic acid available from EVONIK Goldschmidt GmbH Polyglyceryl-3 (TEGO® COSMO P813) and polyglyceryl-4 laurate (TEGO® CARE PL4).

  Preferred polyoxyethylene alkylcarboxylic acid esters are polyoxyethylene and fatty acid esters, more preferably polyoxyethylene having an average degree of polymerization of 2 to 8, preferably 5 to 8, and 6 to 18, more preferably. Is a polyoxyethylene fatty acid ester obtained by esterifying a fatty acid having 8 to 16 carbon atoms, and the absolute value of the difference in the number of carbon atoms between the structural unit of polyoxyethylene and the structural unit of fatty acid is 2 or less belongs to. Examples of this type of ester include decanoic acid PEG-6, lauric acid PEG-6, lauric acid PEG-7, and coconut oil fatty acid PEG-7.

  In the present invention, the amphiphilic polyether polyol alkyl carboxylic acid ester may be used alone or in combination of two or more kinds. The amount of the amphiphilic polyether polyol alkylcarboxylic acid ester component relative to the total weight of the cosmetic composition according to the present invention is usually 10 to 35% by weight, preferably 15 to 25% by weight.

  Due to the presence of the amphiphilic polyether polyol alkyl carboxylic acid ester component, the cosmetic composition according to the present invention is imparted with a good cleansing power and a good washability. Based on its density, this component will most often appear in the intermediate layer.

  Another important component of the cosmetic composition according to the present invention is a polyol. Preferably the polyol is glycerol and / or propylene glycol, preferably glycerol. Since glycerol has a relatively high specific gravity, it appears mainly in the lowest layer.

  The amount of the polyol component relative to the total weight of the cosmetic composition according to the present invention is usually 25 to 50% by weight, preferably 25 to 35% by weight.

  In addition to this, the cosmetic composition according to the present invention may also contain water. The presence of water plays the following roles: reduces costs, improves the freshness of the product, and most importantly, the addition of water can increase the thickness of the intermediate layer, Thus, the amount of the hydrophilic plasticizer phase in the intermediate layer and the amount of the glycerol phase in the lowermost layer can be appropriately adjusted. The amount of water relative to the total weight of the cosmetic composition according to the present invention is generally preferably 10 to 30% by weight, more preferably 15 to 30% by weight. When glycerol is used as the polyol component of the cosmetic composition according to the present invention, the weight ratio of glycerol to water is preferably 2: 1 to 1: 2.

  In order to improve the properties so that the cosmetic composition according to the present invention has a more favorable phase separation rate, the cosmetic composition according to the present invention may further comprise non-silicone oil-based oils and / or fats. . The phase separation rate increases with increasing polarity, and the rate of separation into three phases can be increased by adding non-silicone oil based oils and / or fats. Thus, the rate at which the cosmetic composition according to the invention separates into three phases can be influenced depending on the nature and amount of any such oil and / or fat.

  Non-silicone oil-based oils and / or fats suitable for the present invention include linear and / or branched mono- and / or dicarboxylic acids having 2 to 44 carbon atoms and 1 to 22 carbon atoms. Monoesters and diesters with saturated or unsaturated linear and / or branched alcohols having the formula: Similarly, an ester of a difunctional aliphatic alcohol having 2 to 36 carbon atoms and a monofunctional aliphatic carboxylic acid having 1 to 22 carbon atoms can be converted to a non-silicone oil-based oil in the context of the present invention. And / or can be used as fat.

  As non-silicone oil-based oils and / or fats used in the context of the present invention, more particularly esters of fatty acids having 12 to 22 carbon atoms (for example methyl esters, isopropyl esters etc.), for example It is possible to use methyl laurate, methyl stearate, methyl oleate, methyl erucate, isopropyl palmitate, isopropyl myristate, isopropyl stearate, and / or isopropyl oleate.

  Preferred compounds used as non-silicone oil based oils and / or fats in the context of the present invention are more particularly n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, Isononyl palmitate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, oleyl oleate, oleyl erucate, and / or erucyl oleate .

  Similarly particularly suitable non-silicone oil-based oils and / or fats used in the context of the present invention are, for example, di-n-butyl adipate, di-n-butyl sebacate, di-2-ethylhexyl adipate Dicarboxylic acid esters such as di-2-hexyldecyl succinate and / or diisotridecyl azelate. Similarly, particularly suitable non-silicone oil-based oils and / or fats used in the context of the present invention are ethylene glycol dioleate, ethylene glycol diisotridecanoate, propylene glycol di-2-ethylhexanoate, butanediol diisostearate, and And / or a diol ester such as neopentyl glycol dicaprylate.

  Triglycerides having relatively long chains are suitable as well, and examples include triesters of glycerol and three acid molecules (of which at least one is a relatively long chain acid molecule). Examples that may be mentioned herein include fatty acid triglycerides including synthetic triglycerides of capryl / capric acid mixtures, industrial oleic acid triglycerides, isostearic acid triglycerides, and palmitic acid / oleic acid mixture triglycerides.

  Furthermore, in addition to linear or branched aliphatic alcohols such as oleyl alcohol and octyldodecanol, aliphatic alcohol esters such as dioctyl ether and PPG-3 myristyl ether can also be used. For example, in addition to natural vegetable oils such as olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, tonsil oil, palm oil, jojoba oil, for example, a liquid fraction of palm oil or palm kernel oil, It is also possible to use a liquid fraction of animal oils such as whale oil, bone oil and beef tallow.

  As non-silicone oil-based oils and / or fats used in the context of the present invention, it is also possible to use hydrocarbon oils / fats, more particularly liquid paraffins and isoparaffins. Hydrocarbon oils / fats that can be used are, for example, paraffin oil, white mineral oil, isohexadecane, polydecene, petrolatum, light liquid paraffin, and squalane.

Also suitable are esters of aryl carboxylic acids such as esters of benzoic acid, for example esterifying saturated or unsaturated linear or branched alcohols having 1 to 22 carbon atoms with benzoic acid. Benzoic acid esters such as isostearyl benzoate and octyldodecyl benzoate, for example, preferably alkyl benzoate (C _12-15 ).

  As non-silicone oil-based oils and / or fats used in the context of the present invention, it is also possible to use, for example, carbonic acid diesters such as diethylhexyl carbonate.

Non-silicone oil-based oils and / or fats that may be used in the context of the present invention are preferably oils and / or fats having a polarity greater than that of white mineral oils, which are moderate and / or highly polar It is what has. Non-silicone oil based oils and / or fats with moderate polarity are preferably diethyl hexyl carbonate, glycerol trioctanoate, alkyl benzoate (C _12-15 ), and / or octyldodecanol, which are highly polar The non-silicone oil-based oil and / or fat having a non-silicone oil-based oil and / or fat having a structural unit of polypropanediol (hereinafter referred to as PPG) is preferable. Are PPG-3 myristyl ether (TEGO® SOFT APM), PPG-11 stearyl alcohol ether (TEGO® SOFT APS), PPG-14 butyl ether (TEGO®) supplied from EVONIK Goldschmidt GmbH. SOFT PBE) and / or PPG-15 stearyl alcohol ether (TEGO (registered) Mark) SOFT E) can be mentioned, PPG-3 myristyl ether is preferred. In the cosmetic field, these ethers are generally regarded as non-silicone oil based hydrophobic oils and / or fats.

  Excessive amounts of non-silicone oil-based polar oils and / or fats will reduce the transparency of each layer, in other words, a slight turbidity. Therefore, the amount of the non-silicone oil-based polar oil and / or fat component is usually 0.1 to 10% by weight, preferably 0.5 to 0.5%, based on the total weight of the cosmetic composition according to the present invention. 5% by weight.

  For the purpose of producing a cosmetic composition according to the invention having an attractive appearance, for example to color the uppermost layer, the intermediate layer and / or the lowermost layer of the composition, more particularly the intermediate layer It is possible to further use a colorant such as a dye for coloring. The polarity of the three layers of the cosmetic product according to the invention is different. Surprisingly, the oil-soluble dye selectively colors the intermediate layer of the three-layer cosmetic according to the invention, while at the same time leaving the top and bottom layers uncolored, while the water-soluble dye It has been found that such excellent selectivity is not exhibited. The oil-soluble dyes that may be used in the context of the present invention are preferably the following groups: D & C Yellow No. 11 Quinoline Yellow; D & C Green No. 11 6 Solvent Green; D & C Violet No. 2 Solvent Violet 13; and D & C Red No. 2 17 Selected from Solvent Red 23.

  The amount of dye used may be tailored to the total amount of product, color purity and lightness required for the layer to be colored, as is well known to those skilled in the art.

  The cosmetic composition according to the present invention can be obtained by a general cosmetic preparation method, for example, by uniformly mixing all components, which is a thermodynamically stable three-phase system. The three phases are stacked one on top of the other in order.

  The cosmetic composition according to the present invention is separated into three layers by standing, each layer is transparent, and the translucency of each layer is up to 80% or more. When the cosmetic composition is shaken until the phase becomes uniform, it is usually possible to form three layers having a clear boundary surface again after standing for 2 to 60 minutes. According to the present invention, the viscosity is advantageously adjusted so that the time until the three layers completely separate and form a clear interface after mixing the cosmetic composition uniformly is within 5 to 20 minutes. Mixing different dimethicones allows control of the viscosity of the polydimethylsiloxane component and / or selection of the nature and amount of non-silicone oil based polar oil / fat.

  Generally speaking, a 1: 1: 1 three-layer structure separated by two interfaces is likely to be accepted by consumers. If it is desired to obtain a three-layer cosmetic product with a ratio of 1: 2: 3 or about 1: 2: 1 or other ratios, it can be obtained by appropriately adjusting the ratio of the above three ingredients. it can.

  In the three-layer cosmetic product according to the present invention, two distinct interfaces can be observed directly, but at the present time what components are present in the individual layers and how each component is distributed to the individual layers It is not clear what is being done.

  The cosmetic composition according to the invention can be used in particular as a make-up remover composition, which product has its low irritation and caring quality and wetness of the polyether polyol alkyl carboxylic acid ester component. Based on the nature, it can be used as a hair care product that does not wash away, or it can be used as a hair care product that does not wash away to enhance the gloss of the hair and improve the combing property.

  The invention is illustrated below by examples, which should not be construed as limiting the scope of the invention.

Example 1

  A cosmetic composition product 1 was obtained by uniformly mixing all components according to the formulation shown in the table above. This product has three layers of approximately equal amount after standing for 15 minutes, their interface is clear, the middle layer is bluish purple, and the top and bottom layers are both colorless and transparent It was observed.

  In use, product 1 is shaken or mixed until the phase is uniform by vibration, then 0.5-1 g of this product is extracted and applied to the target site to facilitate various types of colored makeup fees Could be removed. This was rinsed clean with water and was able to clean the skin. The skin feel after use was smooth and flexible.

The three layers of product 1 were identified as the uppermost layer, the middle layer, and the lowermost layer from the lighter side to the heavier side. A sample was collected by inserting a disposable syringe needle into the center of each layer and carefully aspirating a portion of it. Using a UV-Vis spectrophotometer, Model 2802 from Unico Company, the translucency of the top layer, intermediate layer, and bottom layer was measured using deionized water as a reference at a wavelength of 425 nm. The transparency of the individual layers was evaluated according to translucency values as shown below:
If the translucency is greater than 90%, the layer is evaluated as transparent and the score is 1;
If the translucency is greater than or equal to 80% and less than 90%, the layer is rated as slightly turbid and a score of 2;
If the translucency is 30% or more and less than 80%, the layer is evaluated to be translucent and the score is 3;
If the translucency is 5% or more and less than 30%, the layer is evaluated as opaque and the rating is 4;
If the translucency was less than 5%, the layer was rated as completely opaque and a rating of 5.

  When the transparency of the uppermost layer, the intermediate layer, and the lowermost layer of the product 1 was evaluated according to the test according to the method described above, all were rated 1.

  Further, the product 1 was subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test. The stability test at room temperature is a test for holding the sample at room temperature of 20-25 ° C. for 3 months; the heat resistance test is a test for holding the sample at 45 ° C. for 3 months; Was subjected to a cooling cycle of −15 ° C./room temperature three times. As a result of carrying out all the tests shown above for product 1, the appearance remained in the same phase separation state as at the start of the test, and no phenomenon such as fading was observed. Therefore, it was shown that the product 1 is stable.

Example 2

  According to the formulation shown in the above table, all the ingredients were uniformly mixed to obtain a cosmetic composition product 2 containing no water. In appearance, after leaving this product for 60 minutes, almost equal three layers were observed, the interface between the layers was clear, and the transparency was evaluated. From the top layer to the bottom layer, The scores were 2, 1, and 2. Furthermore, when a stability test at room temperature, a heat resistance test, and a freeze / thaw test were performed on the product 2, it was shown that the product 2 was stable.

Example 3

  A cosmetic composition product 3 was obtained by uniformly mixing all the components according to the formulation shown in the table above. In terms of appearance, after standing this product for 25 minutes, almost equal three layers were observed, the interface between the layers was clear, all layers were colorless and transparent, and the transparency was evaluated. Was 1. Furthermore, when the product 3 was subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, the product 3 was shown to be stable.

Example 4

  A cosmetic composition product 4 was obtained by uniformly mixing all components according to the formulation shown in the table above. In terms of appearance, after standing this product for 25 minutes, almost equal three layers were observed, the interface between the layers was clear, and each layer was colorless and transparent. The score was 1. Furthermore, when the product 4 was subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, the product 4 was shown to be stable.

Example 5

  A cosmetic composition product 5 was obtained by uniformly mixing all the components according to the formulation shown in the table above. In appearance, the product was allowed to stand for 15 minutes, and almost equal three layers were observed, the interface between the layers was clear, and all layers were colorless and transparent. The score was 1. Furthermore, when the product 5 was subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, the product 5 was shown to be stable.

Example 6

  A cosmetic composition product 6 was obtained by uniformly mixing all the components according to the formulation shown in the table above. In terms of appearance, after standing this product for 15 minutes, almost equal three layers were observed, the interface between the layers was clear, all layers were colorless and transparent, and the transparency was evaluated. Was 1. Furthermore, when the product 6 was subjected to a stability test at room temperature, a heat resistance test, and a freeze / thaw test, the product 6 was shown to be stable.

Comparative Example 7 and Examples 8-11

  According to the formulations shown in the above table for Comparative Example 7 and Examples 8 to 11, cosmetic ingredients 7 to 11 were obtained by uniformly mixing all components for each formulation.

  From Examples 8 to 11, it can be seen that in the range of 5 to 50 cps, the time required for the phase separation with a clear boundary surface to occur by standing increases as the viscosity of dimethicone increases. Even when different dimethicones having different viscosities are mixed to form a polydimethylsiloxane composition, the object of the present invention can be achieved if the combined viscosity of this composition is in the range of 5 to 50 cps. If it is a trader, it can be predicted. If the viscosity is less than 5 cps, the volatility and permeability of dimethicone will increase and it will be difficult to obtain a three-layer structure with this system (see Comparative Example 7).

  Further, when products 8-11 were subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, it was shown that products 8-11 were stable.

Example 12

  A cosmetic composition product 12 was obtained by uniformly mixing all the components according to the formulation shown in the table above. In terms of appearance, after standing this product for 60 minutes, almost equal three layers were observed, the interface between the layers was clear, and all the layers were colorless and transparent. The score was 1. Further, when the product 12 was subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, the product 12 was shown to be stable.

  When using the present invention, non-silicone oil based polar oil / fat is a selectable ingredient, and when using low viscosity dimethicone, this type of polar oil / fat (eg, polar oil / fat) A relatively high phase separation rate can be achieved even in the absence of diethyl hexyl carbonate and the like). For example, Example 12 contained dimethicone with a viscosity of 20 cps and took 60 minutes, while in comparison Example 10 with dimethicone and 20 cps diethylhexyl carbonate required only 15-16 minutes.

Examples 13-14

  According to the formulations shown in the table above for Examples 13 to 14, cosmetic ingredients 13 to 14 were obtained by uniformly mixing all the components.

  From this test, it was found that the higher the oil / fat polarity, the more effectively the phase separation rate can be accelerated. In Example 13, for example, when PPG-3 myristyl ether having relatively high polarity was added instead of diethyl hexyl carbonate of Example 10, a clear interface appeared in the product within 5 minutes after standing, On the other hand, in Example 10, it took 15 to 16 minutes for a clear boundary surface to appear. In the case of the example shown in Example 14, a less polar white oil was used in place of the diethyl hexyl carbonate of Example 10 but required about 25 minutes for delamination.

  Furthermore, the products 13 and 14 were subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, which showed that the products 13 and 14 were stable.

Examples 15-19

  According to the formulations shown in the table above for Examples 15 to 19, cosmetic ingredients 15 to 19 were obtained by uniformly mixing all the components. In appearance, after 15 to 20 minutes, the same amount of three layers was observed in these products, the interface between the layers was clear, and the translucency was evaluated. Furthermore, when products 15-19 were subjected to a stability test at room temperature, a heat resistance test, and a freeze-thaw test, it was shown that products 15-19 were stable.

  The results of the tests shown above show that oil-soluble dyes should preferably be used in order to obtain a three-layer system in which only the intermediate layer is colored. In Examples 15 and 19 using a yellow dye, oil-soluble D & C Yellow No. 11 colored only the intermediate layer, while water-soluble D & C Yellow No. 11 was used. No. 5 showed a coloring action on the lower two layers.

  "Small amount" in the table above means the amount of dye used when the total weight is a composition of 100 g or less if it is desired to obtain a medium purity and lightness in the colored area. Usually means less than 0.001 g.

Claims (10)

A cosmetic composition, based on the total weight of the composition:
(1) At least one 20-40 wt% Brookfield rotational viscometer with spindle No. A polydimethylsiloxane having a viscosity of 5 to 50 cps measured at 25 ° C. at a rotation speed of 100 rpm using 2;
(2) 10 to 35% by weight of at least one ester of a polyether type polyol and an alkyl carboxylic acid, both of the structural unit of the polyether type polyol and the structural unit of the alkyl carboxylic acid Amphiphilic polyether having 6 to 20 carbon atoms, wherein the absolute value of the difference in the number of carbon atoms between the structural unit of the polyether-type polyol and the structural unit of the alkylcarboxylic acid is 2 or less A composition comprising: a polyol alkyl carboxylic acid ester; and (3) 25-50% by weight of at least one polyol. The amphiphilic polyether polyol alkyl carboxylic acid ester component (2) is a polyglycerol alkyl carboxylic acid ester, an alkyl carboxylic acid ester of polyoxyethylene, or a mixture thereof;
The polyglycerol alkyl carboxylic acid ester is preferably an ester of polyglycerol and a fatty acid, more preferably a polyglycerol having an average degree of polymerization of 3 to 5 and a fatty acid having 8 to 16, preferably 8 to 12 carbon atoms A polyglycerol fatty acid ester obtained by esterifying a polyoxyethylene, wherein the polyoxyethylene alkylcarboxylic acid ester is preferably an ester of polyoxyethylene and a fatty acid, more preferably an average degree of polymerization of 2 to 8 It is a polyoxyethylene fatty acid ester obtained by esterifying ethylene and a fatty acid having 6 to 18 carbon atoms.
The composition of claim 1. The composition of claim 2, wherein the amphiphilic polyether polyol alkyl carboxylic acid ester component (2) is selected from one or more of the following groups:
Polyglyceryl-3 decanoate, polyglyceryl-4 decanoate, polyglyceryl-3 octoate, polyglyceryl-4 laurate, PEG-6 decanoate, PEG-6 laurate, PEG-7 laurate, and coconut oil fatty acid PEG-7.   The composition according to any one of claims 1 to 3, wherein the polyol component (3) is glycerol, propanediol, or a mixture thereof. Based on the total weight of the composition,
25 to 35% by weight of the polydimethylsiloxane component (1),
15 to 25% by weight of the amphiphilic polyether polyol alkyl carboxylic acid ester component (2),
The composition according to any one of claims 1 to 4, comprising 25 to 35% by weight of the polyol component (3) and 10 to 30% by weight of water. Based on the total weight of the composition,
The composition according to any one of claims 1 to 5, comprising 15 to 30% by weight of water. Based on the total weight of the composition,
The composition according to claim 1, further comprising 0.1 to 10% by weight of at least one non-silicone oil-based polar oil and / or fat. 8. The composition of claim 7, wherein the at least one non-silicone oil-based polar oil and / or fat is selected from one or more of the following groups:
Diethylhexyl carbonate, glyceryl trioctanoate, alkyl benzoate (C12-15), octyldodecanol, PPG-3 myristyl ether, PPG-11 stearyl alcohol ether, PPG-14 butyl ether, and PPG-15 stearyl alcohol ether, preferably Diethylhexyl carbonate or PPG-3 myristyl ether. The composition according to any one of claims 1 to 8, further comprising an oil-soluble dye, preferably selected from the following group:
D & C Yellow No. 11 Quinoline Yellow, D & C Green No. 11 6 Solvent Green, D & C Violet No. 2 Solvent Violet 13 and D & C Red No. 17 Solvent Red 23.   After the composition is shaken and allowed to stand until the phase is uniform, it naturally separates into 3 layers having a clear interface within 2 to 60 minutes, each layer is transparent, preferably each layer The composition as described in any one of Claims 1-9 whose translucency is 80% or more.