Liquid crystal emulsion

Abstract

To provide a liquid crystal emulsion used for a cleansing cosmetic which can arbitrarily adjust the properties when used as a cleansing cosmetic, can easily adjust the viscosity or sense of use while maintaining good makeup removal and is used for a cleansing cosmetic which can be inexpensively produced.SOLUTION: There is provided a liquid crystal emulsion which contains 33 to 60 pts.wt. of component (A), 12 to 25 pts.wt. of component (B), 0.2 to 5 pts.wt. of component (C), 15 to 30 pts.wt. of component (D) and 0 to 22 pts.wt. of a solvent. (A): an oily agent, (B): one or more hydrophilic surfactants having an HLB value of 13 or more, (C): a phospholipid and (D): a polyhydric alcohol.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a liquid crystal emulsion for use in a cleansing cosmetic preparation. [Background technology]

[0002] Generally, a cleansing cosmetic for removing makeup is used to blend the cleansing cosmetic with the skin and dissolve or disperse the makeup cosmetic remaining on the skin, and then the cleansing cosmetic is removed from the skin by rinsing with water or wiping it off to remove the makeup.

[0003] However, it is not easy to completely remove cleansing cosmetics from the skin, and washing them off can be a hassle, and there are concerns that wiping them off can be a burden on the skin. Therefore, gel-type liquid crystal cosmetic compositions that are easily blended with makeup cosmetics and have excellent water-washability have been proposed (see, for example, Patent Document 1). Cleansing cosmetics, known as liquid crystal makeup removers, are said to have high detergency (makeup removal power) and good water-washability, and are said to have excellent properties as cleansing cosmetics.

[0004] Cleansing cosmetics come in several types, such as oil, gel, cream, and milk (emulsion), and are appropriately selected for their makeup removing performance and properties according to the purpose and application, such as oil types being used to remove heavy makeup and gel types being used for makeup removal that also serves as a massage. In addition, depending on the user's preferences, the viscosity of the cleansing cosmetic and even the time it takes to remove makeup can be cited as criteria for selecting a cleansing cosmetic.

[0005] However, the above-mentioned liquid crystal cosmetic composition is a gel type and is not suitable for other properties, and it is difficult to control the properties, etc. according to the user's preferences. For these reasons, there has been a demand for a cleansing cosmetic composition, known as a liquid crystal makeup remover, in which the viscosity, properties, etc. can be selected according to the user's preferences. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4969773 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of the above-mentioned points, and provides a liquid crystal emulsion which maintains good makeup removal ability while allowing the properties of the resulting cleansing cosmetic to be adjusted as desired, and which also allows easy adjustment of the viscosity and feel when used, and which can be produced inexpensively. [Means for solving the problem]

[0008] That is, the first invention comprises 30 to 60 parts by weight of component (A), 10 to 30 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), 15 to 30 parts by weight of component (D), and 0 to 25 parts by weight of water as a solvent; The amount of higher alcohol added in the component (A) is less than 10 parts by weight, The component (B) contains a hydrophilic surfactant (b1) of Octyldodeceth-20 or Octyldodeceth-25 and a surfactant (b2) having a multi-chain alkyl group with 18 or more carbon atoms, and the average HLB value of the component (B) represented by the following formula (i) is 8.0 or more. The present invention relates to a liquid crystal emulsion characterized in that (A): Oil (B): Surfactant (C): Phospholipids (D): Polyhydric alcohol

[0009]

number

[0010] A second invention relates to the liquid crystal emulsion of the first invention, wherein the phospholipid of the component (C) is hydrogenated lecithin or lysolecithin.

[0011] A third invention relates to the liquid crystal emulsion according to the first or second invention, which is a cleansing cosmetic. Effect of the Invention

[0012] The liquid crystal emulsion according to the first invention contains 30 to 60 parts by weight of component (A), 10 to 30 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), 15 to 30 parts by weight of component (D), and 0 to 25 parts by weight of water as a solvent, in which the amount of higher alcohol added in component (A) is less than 10 parts by weight, and component (B) contains hydrophilic surfactant (b1) octyldodeceth-20 or octyldodeceth-25 as well as surfactant (b2) which is a multi-chain type having an alkyl group with 18 or more carbon atoms, and the average HLB value of component (B) shown in the above formula (i) is 8.0 or more. Therefore, while maintaining good makeup removal, the properties when made into a cleansing cosmetic can be arbitrarily adjusted without interfering with the formation of liquid crystal components, and the viscosity, feel during use, and even the speed of makeup removal can be easily adjusted arbitrarily, and furthermore, it can be produced at low cost.

[0013] According to the liquid crystal emulsion of the second invention, since the phospholipid of the component (C) in the first invention is hydrogenated lecithin or lysolecithin, the liquid crystal component can be stably formed.

[0014] According to the liquid crystal emulsion of the third invention, in the first or second invention, since the liquid crystal emulsion is a cleansing cosmetic, it is possible to provide a cleansing cosmetic that has properties and texture suited to the needs of the user while maintaining good makeup removal properties. [Brief description of the drawings]

[0015] [Figure 1] 2 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic composition of prototype 1. [Diagram 2] 2 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 4. [Diagram 3] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic composition of prototype 5. [Figure 4] 2 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 7. [Diagram 5] 2 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 8. [Figure 6] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 9. [Figure 7] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 10. [Figure 8] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 11. [Figure 9] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 13. [Figure 10] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 16. [Figure 11] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 17. [Figure 12] 1 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 18. [Figure 13] 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 20. [Figure 14] 2 is a 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 23. [Figure 15] 250x magnified photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 25. [Figure 16] 250x magnification photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 26. [Figure 17] 250x magnification photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 27. [Figure 18] 250x magnification photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 29. [Figure 19] 250x magnification photograph of the liquid crystal component of the cleansing cosmetic preparation of prototype 30. [Figure 20] 1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 1. [Figure 21] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 5. [Figure 22] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 7. [Diagram 23] 1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 8. [Figure 24] 1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 9. [Diagram 25] 1 is a 1000x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 10. [Figure 26] 1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 11. [Figure 27]1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 13. [Figure 28] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 16. [Figure 29] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 17. [Diagram 30] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 18. [Diagram 31] 1 is a 1000x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of prototype 20. [Diagram 32] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 23. [Diagram 33] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 25. [Diagram 34] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 26. [Diagram 35] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of Prototype Example 27. [Diagram 36] 1 is a 1000x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 29. [Figure 37] 1 is a 1000x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 30. [Figure 38]1 is a 250x magnification photograph of particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 1. [Figure 39] 1 is a 250x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 5. [Diagram 40] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 7. [Diagram 41] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 8. [Diagram 42] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 9. [Diagram 43] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 10. [Diagram 44] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 11. [Diagram 45] 1 is a 250x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 13. [Diagram 46] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 16. [Figure 47] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of Prototype Example 17. [Figure 48] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 18. [Figure 49]1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of prototype 20. [Figure 50] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of prototype 23. [Figure 51] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of prototype 25. [Figure 52] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of Prototype Example 26. [Figure 53] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of Prototype Example 27. [Figure 54] 1 is a 250x magnification photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic composition of Prototype Example 29. [Figure 55] 1 is a 250x magnified photograph showing particles in an emulsion washed out in a makeup removal experiment using the cleansing cosmetic product of Prototype Example 30. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The liquid crystal emulsion of the present invention is used in a cleansing cosmetic for removing makeup, and can also be used in a milky lotion or skin lotion by diluting it. The liquid crystal emulsion of the present invention contains component (A), component (B), component (C), component (D), and a solvent. In addition, additives used in general cosmetics, such as moisturizers, preservatives, fragrances, colorants, and pH adjusters, can be appropriately added to the cleansing cosmetic in which the liquid crystal emulsion is used.

[0017] The component (A) is an oil, and is mainly selected from those suitable for cleansing agents, which are the main components of makeup removers. For example, known oils such as ethylhexyl palmitate, tri(caprylic acid / capric acid)glyceryl, triethylhexanoin, cetyl ethylhexanoate, and mineral oil can be used. In particular, choosing an inexpensive oil is economical.

[0018] In addition to the above-mentioned oils, oils for adjustment can be added to change the feel of the cleansing cosmetic, such as the spreadability and skin familiarity. They are selected from silicones, higher alcohols, fatty acids, etc., and are added to adjust the viscosity as well as the feel of the cosmetic. Examples of such oils include known oils such as linear or cyclic silicones such as cyclopentasiloxane, cyclohexasiloxane, and dimethicone, and higher alcohols such as cetearyl alcohol, behenyl alcohol, cetanol, and stearyl alcohol. Furthermore, oils that are preferred by consumers and have a so-called concept can also be added. The oils that form the concept of these are preferably those that have a pleasant scent, those derived from natural substances, or those that contain functional ingredients such as vitamin derivatives. Examples of such oils include well-known oils, such as vegetable oils such as jojoba seed oil, Argania spinosa kernel oil, avocado oil, almond oil, and macadamia nut oil, animal-derived oils such as horse oil and lanolin, hydrocarbons such as squalane, squalene, petrolatum, and liquid paraffin, and oil-soluble functional ingredients such as tocopherol, retinol, and derivatives thereof.

[0019] The component (B) is a surfactant, and is selected and added to arbitrarily adjust the compatibility with makeup, the removal, and the viscosity. In particular, a hydrophilic surfactant (b1) having an HLB value of 13 or more is selected to generate the liquid crystal component related to the liquid crystal emulsion of the present invention. In the examples described below, Octyldodeceth-20 was mainly selected. In addition to Octyldodeceth-20, Octyldodeceth-25 and the like are also included. Furthermore, by combining with other surfactants (b2), it is possible to improve the efficiency of generating the liquid crystal component and to arbitrarily control the properties of the cleansing cosmetic product to be liquid, creamy, gel, and the like. In addition, the viscosity can be changed, and even the feeling of use can be adjusted.

[0020] Here, the other surfactant (b2) is selected to be a multi-chain surfactant having an alkyl group with a carbon number of 18 or more. By setting the average HLB value of the hydrophilic surfactant (b1) having an HLB value of 13 or more, as shown in the above formula (i), and the multi-chain surfactant (b2) having an alkyl group with a carbon number of 18 or more to 8.0 or more, the generation of liquid crystal components becomes good, as shown in the examples described later.Examples of the multi-chain surfactant (b2) having an alkyl group with 18 or more carbon atoms include PEG-20 hydrogenated castor oil isostearate, PEG (polyethylene glycol)-4 glyceryl distearate, PEG-30 hydrogenated castor oil, PEG-8 diisostearate, polyglyceryl-10 dicocoate, polysorbate 80, PEG-4 glyceryl tristearate, as well as polyglyceryl-10 triisostearate, polyglyceryl-10 diisostearate, polyglyceryl-10 tricocoate, polyglyceryl-10 dioleate, and sesquistearate. Polyglyceryl-10 tearic acid, polyglyceryl-10 tetraoleate, PEG-4 diisostearate, PEG-8 diisostearate, PEG-12 diisostearate, PEG-10 butylene glycol diisostearate, PEG-25 butylene glycol diisostearate, PEG-65 butylene glycol diisostearate, PEG-15 butylene glycol diisostearate, PEG-4 sorbitan triisostearate, PEG-3 glyceryl triisostearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, triisostearate PEG-15 Glyceryl Phosphate, PEG-20 Glyceryl Triisostearate, PEG-30 Glyceryl Triisostearate, PEG-40 Glyceryl Triisostearate, PEG-50 Glyceryl Triisostearate, PEG-5 Hydrogenated Castor Oil Triisostearate, PEG-10 Hydrogenated Castor Oil Triisostearate, PEG-15 Hydrogenated Castor Oil Triisostearate, PEG-20 Hydrogenated Castor Oil Triisostearate, PEG-30 Hydrogenated Castor Oil Triisostearate, PEG-40 Hydrogenated Castor Oil Triisostearate, Triisos Examples of known surfactants include PEG-50 hydrogenated castor oil stearate, PEG-60 hydrogenated castor oil triisostearate, PEG-4 glyceryl tristearate, PEG-5 glyceryl tristearate, PEG-6 glyceryl tristearate, PEG-10 glyceryl tristearate, PEG-15 glyceryl tristearate, PEG-20 glyceryl tristearate, polyglyceryl-10 tristearate, PEG-4 distearate, PEG-6 distearate, PEG-8 distearate, and PEG-12 distearate.Since these components (B) are not special surfactants, they are easily available and inexpensive, and therefore are economical.

[0021] Component (C) is a phospholipid and is a factor for generating liquid crystals. In the examples described below, hydrogenated lecithin was mainly selected. Hydrogenated lecithin is particularly favorable in generating liquid crystals, and is likely to generate uniform liquid crystals. In addition to hydrogenated lecithin, known phospholipids such as lysolecithin can be selected.

[0022] The component (D) is a polyhydric alcohol, which contributes to the stabilization of the system. If a large amount of polyhydric alcohol is added, the cleansing cosmetic composition can be made into a gel, and the amount added can be changed according to the desired properties. The polyhydric alcohol can be selected from known polyhydric alcohols such as glycerin, butylene glycol (BG), polyethylene glycol, isopentyl diol, propane diol, diglycerin, propylene glycol, dipropylene glycol, pentaerythritol, sorbitol, sorbitan, maltitol, and trehalose.

[0023] The liquid crystal emulsion of the present invention contains 30 to 60 parts by weight of component (A), 10 to 30 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), 15 to 30 parts by weight of component (D), and 0 to 25 parts by weight of water as a solvent. If the amount of oil added as component (A) is too large, the liquid crystal component may not be uniformly dispersed or the components may not be mixed. If the amount of component (A) is high, the viscosity decreases and the emulsion exhibits liquid properties. If higher alcohol or silicone is added, the viscosity increases and the emulsion tends to have a hard texture. As shown in the examples below, if 10 parts by weight or more of higher alcohol is added, the liquid crystal component may not be generated or the components may separate.

[0024] Too much surfactant, component (B), puts a strain on the skin, while too little can make it difficult to remove makeup. Too little component (C) and liquid crystal components will not be produced. There is no particular problem with adding more component (C), but the amount of liquid crystal components produced does not change significantly from about 2 parts by weight, so the upper limit for the amount to be added is set at 5 parts by weight. Too little polyhydric alcohol, component (D), can make the system unstable and cause separation. Conversely, too much can lead to solidification.

[0025] The liquid crystal emulsion of the present invention can be obtained by stirring the oil phase of components (A), (B) and (C) while heating at 70 to 80°C, mixing component (D) with the solvent and each additive while heating and stirring at 70 to 80°C, and cooling the mixture. It is also considered that the liquid crystal emulsion of the present invention can be obtained by mixing each component at once and heating and stirring. Since the production method does not require any special steps, the liquid crystal emulsion of the present invention can be easily obtained and is economical. EXAMPLES

[0026] [Materials used] The inventors used the following materials to prepare a cleansing cosmetic composition using a prototype liquid crystal emulsion.

[0027] <Component (A)> Ethylhexyl palmitate (A1): "Salacos P-8" (registered trademark) manufactured by Nisshin Oillio Group Co., Ltd. Caprylic / capric triglyceride (A2): Kao Corporation's "Coconard MT" (registered trademark) Cyclopentasiloxane (A3): Shin-Etsu Chemical Co., Ltd., "CY-5" Mineral oil (A4): "Moresco White P-70" (registered trademark) manufactured by MORESCO Corporation Cetearyl alcohol (A5): Kao Corporation's "Kalcol 6850" (registered trademark)

[0028] <(B) component> Octyldodeceth-20 (B1): EMALEX OD-20 (registered trademark), manufactured by Nippon Emulsion Co., Ltd., HLB value 13, alkyl group carbon number 20, multi-chain type Polyglyceryl-10 triisostearate (B2): Nippon Emulsion Co., Ltd., "EMALEX TISG-10", HLB value 8, alkyl group carbon number 18, multi-chain type Dioctyldodeceth-5 lauroyl glutamate (B3): "AMITER LGOD-5(H)" (registered trademark), manufactured by Nippon Emulsion Co., Ltd., HLB value 6, alkyl group carbon number 20, multi-chain type PEG-20 hydrogenated castor oil isostearate (B4): Nippon Emulsion Co., Ltd., "EMALEX RWIS-120", HLB value 8, alkyl group carbon number 18, multi-chain type PEG-4 glyceryl distearate (B5): Nippon Emulsion Co., Ltd., "EMALEX GWS-204", HLB value 4, alkyl group carbon number 18, multi-chain type PEG-60 hydrogenated castor oil (B6): Kao Corporation, "Emanon CH-60(K)" (registered trademark), HLB value 14, alkyl group carbon number 18 (mixed product), multi-chain type PEG-30 hydrogenated castor oil (B7): Nippon Emulsion Co., Ltd., "EMALEX HC-30", HLB value 11, alkyl group carbon number 18 (mixed product), multi-chain type PEG-8 diisostearate (B8): Nippon Emulsion Co., Ltd., "EMALEX 400di-IS", HLB value 6, alkyl group carbon number 18, multi-chain type Polyglyceryl-10 dicoconut oil fatty acid (B9): Nippon Emulsion Co., Ltd., "EMALEX DCCG-10", HLB value 12, alkyl group carbon number 8-18, multi-chain type Polysorbate 80 (B10): Kao Corporation, "Rheodol TW-0120V" (registered trademark), HLB value 15, alkyl group carbon number 18, single chain type Sorbitan sesquioleate (B11): Nippon Emulsion Co., Ltd., "EMALEX SPO-150", HLB value 6, alkyl group carbon number 18, single-chain and multi-chain mixed type PEG-4 glyceryl triisostearate (B12): Nippon Emulsion Co., Ltd., "EMALEX GWS-304", HLB value 2, alkyl group carbon number 18, multi-chain type Steareth-11 (B13): Nippon Emulsion Co., Ltd., "EMALEX 611", HLB value 11, alkyl group carbon number 18, single chain type Octyldodeceth-5 (B14): Nippon Emulsion Co., Ltd., "EMALEX OD-5", HLB value 7, alkyl group carbon number 20, multi-chain type Octyldodeceth-10 (B15): Nippon Emulsion Co., Ltd., "EMALEX OD-10", HLB value 10, alkyl group carbon number 20, multi-chain type Octyldodeceth-25 (B16): Nippon Emulsion Co., Ltd., "EMALEX OD-25", HLB value 14, alkyl group carbon number 20, multi-chain type

[0029] <(C) component> Hydrogenated lecithin (C1): "NIKKOL Lecithin S-10" (registered trademark) manufactured by Nikko Chemicals Co., Ltd.

[0030] <(D) component> Glycerin (D1): "Concentrated glycerin for cosmetics" manufactured by Sakamoto Pharmaceutical Co., Ltd.

[0031] <Additives> When preparing a cleansing cosmetic composition using the prototype liquid crystal emulsion, the inventors added the following additives as appropriate. Preservative (phenoxyethanol): "Phenoxyethanol S" manufactured by Yokkaichi Chemical Co., Ltd. Moisturizer (glucosyl trehalose): "Tornale" (registered trademark) manufactured by Hayashibara Co., Ltd.

[0032] [Preparation of prototype cleansing cosmetics] The inventors used the above materials to obtain the following prototype cleansing cosmetics. The average HLB value of each prototype was calculated using the above formula (i).

[0033] [Prototype 1] A total of 42.5 parts by weight of ethylhexyl palmitate (A1) 12 parts by weight, tri(caprylic acid / capric acid)glyceryl (A2) 19 parts by weight, cyclopentasiloxane (A3) 1 part by weight, mineral oil (A4) 5.5 parts by weight, and cetearyl alcohol 5 parts by weight were heated at 80°C and stirred with 13 parts by weight of octyldodeceth-20 (B1) as component (B) and 1 part by weight of hydrogenated lecithin (C1) as component (C), and then mixed with 20 parts by weight of glycerin (D1) as component (D), 22 parts by weight of water as a solvent, and 1 part by weight of moisturizing agent glucosyl trehalose and 0.5 parts by weight of preservative phenoxyethanol as additives, and cooled to obtain a cleansing cosmetic of prototype 1. The average HLB value of prototype 1 is 13.0.

[0034] [Prototype 2] A cleansing cosmetic preparation of Sample 2 was obtained in the same manner as Sample 1, except that the component (B) was 13 parts by weight of polyglyceryl-10 triisostearate (B2). Sample 2 had an average HLB value of 8.0.

[0035] [Prototype 3] A cleansing cosmetic preparation of Sample 3 was obtained in the same manner as Sample 1, except that the component (B) was 13 parts by weight of dioctyldodeceth-5 lauroyl glutamate (B2). Sample 3 had an average HLB value of 6.0.

[0036] [Prototype 4] A cleansing cosmetic preparation of Sample Example 4 was obtained in the same manner as Sample Example 1, except that the component (B) was 13 parts by weight of PEG-20 hydrogenated castor oil isostearate (B4). Sample Example 4 had an average HLB value of 8.0.

[0037] [Prototype 5] A cleansing cosmetic preparation of Sample 5 was obtained in the same manner as Sample 1, except that the (B) component was changed to 8 parts by weight of octyldodeceth-20 (B1) and 5 parts by weight of PEG-4 glyceryl distearate (B5). Sample 5 had an average HLB value of 9.5.

[0038] [Prototype 6] The cleansing cosmetic preparation of Sample 6 was obtained in the same manner as Sample 1, except that the (B) component was 8 parts by weight of octyldodeceth-20 (B1), 5 parts by weight of PEG-60 hydrogenated castor oil (B6), no (C) component was added, and the solvent was 23 parts by weight. The average HLB value of Sample 6 was 13.4.

[0039] [Prototype 7] A cleansing cosmetic preparation of Prototype Example 7 was obtained in the same manner as in Prototype Example 1, except that the (B) component was 8 parts by weight of octyldodeceth-20 (B1), 5 parts by weight of PEG-60 hydrogenated castor oil (B6), the (C) component hydrogenated lecithin (C1) was 2 parts by weight, and the solvent was 21 parts by weight. The average HLB value of Prototype Example 7 was 13.4.

[0040] [Prototype 8] A cleansing cosmetic preparation was obtained in the same manner as in Sample Example 7, except that in component (B), PEG-60 hydrogenated castor oil (B6) was replaced with PEG-30 hydrogenated castor oil (B7). Sample Example 8 had an average HLB value of 12.2.

[0041] [Prototype 9] In component (B), PEG-60 hydrogenated castor oil (B6) was changed to PEG-8 diisostearate (B8), and the solvent was 22 parts by weight and the moisturizer was 0 parts by weight (not added), but the rest of the process was the same as in prototype 7 to obtain the cleansing cosmetic product of prototype 9. The average HLB value of prototype 9 is 10.3.

[0042] [Prototype 10] In component (B), PEG-60 hydrogenated castor oil (B6) was changed to polyglyceryl dicocoate (B9), and the solvent was 22 parts by weight and the moisturizer was 0 parts by weight (not added), but the same procedure was followed as in Sample Preparation 7 to obtain the cleansing cosmetic preparation of Sample Preparation 10. Sample Preparation 10 has an average HLB value of 12.6.

[0043] [Prototype example 11] In component (B), PEG-60 hydrogenated castor oil (B6) was changed to polysorbate 80 (B10), and the solvent was 22 parts by weight and the moisturizer was 0 parts by weight (not added), but the same procedures were followed as in prototype 7 to obtain the cleansing cosmetic product of prototype 11. The average HLB value of prototype 11 is 13.8.

[0044] [Prototype 12] In component (B), PEG-60 hydrogenated castor oil (B6) was changed to sorbitan sesquioleate (B11), and the solvent was 22 parts by weight and the moisturizer was 0 parts by weight (not added), but the same procedure was followed as in prototype 7 to obtain the cleansing cosmetic product of prototype 12. The average HLB value of prototype 12 is 10.3.

[0045] [Prototype 13] In component (B), PEG-60 hydrogenated castor oil (B6) was changed to PEG-4 glyceryl triisostearate (B12), and the solvent was 22 parts by weight and the moisturizer was 0 parts by weight (not added), but the same procedure was followed as in prototype 7 to obtain the cleansing cosmetic product of prototype 13. The average HLB value of prototype 13 is 8.8.

[0046] [Prototype 14] Among the components (B), PEG-60 hydrogenated castor oil (B6) was changed to steareth-11 (B13), and the solvent was 22 parts by weight, and the moisturizer was 0 parts by weight (not added), but the same procedure was followed as in Prototype Example 7 to obtain a cleansing cosmetic product as Prototype Example 14. The average HLB value of the surfactant in Prototype Example 14 is 12.2. In the table, the average HLB value of the surfactant is shown in the column for average HLB value.

[0047] [Prototype 15] A cleansing cosmetic preparation of prototype 15 was obtained in the same manner as prototype 7, except that the (B) component was 5 parts by weight of PEG-4 glyceryl distearate (B5), 8 parts by weight of PEG-60 hydrogenated castor oil (B6), 22 parts by weight of solvent, and 0 parts by weight of moisturizer (not added). The average HLB value of prototype 15 is 10.2.

[0048] [Prototype 16] A cleansing cosmetic of Prototype Example 16 was obtained in the same manner as Prototype Example 1, except that the (A) component was 46 parts by weight, consisting of 23 parts by weight of ethylhexyl palmitate (A1), 15 parts by weight of tri(caprylic acid / capric acid)glyceryl (A2), and 8 parts by weight of mineral oil (A4), 15 parts by weight of octyldodeceth-20 (B1) and 6 parts by weight of PEG-8 diisostearate (B5) as the (B) component, 2 parts by weight of hydrogenated lecithin (C1) as the (C) component, 19.5 parts by weight of glycerin (D1) as the (D) component, 11 parts by weight of water as a solvent, and 0.5 parts by weight of the preservative phenoxyethanol as an additive. The average HLB value of Prototype Example 16 was 11.0.

[0049] [Prototype 17] A cleansing cosmetic preparation of Sample Example 17 was obtained in the same manner as Sample Example 16, except that the component (B) was changed to 6 parts by weight of octyldodeceth-20 (B1) and 15 parts by weight of PEG-8 diisostearate (B5). Sample Example 17 has an average HLB value of 8.0.

[0050] [Prototype 18] A cleansing cosmetic preparation of Sample Example 18 was obtained in the same manner as Sample Example 16, except that the (B) component was changed to 15 parts by weight of octyldodeceth-20 (B1) and 6 parts by weight of PEG-4 glyceryl tristearate (B12). Sample Example 18 has an average HLB value of 9.9.

[0051] [Prototype Example 19] A cleansing cosmetic preparation of Sample 19 was obtained in the same manner as Sample 16, except that the (B) component was changed to 6 parts by weight of octyldodeceth-20 (B1) and 15 parts by weight of PEG-4 glyceryl tristearate (B12). Sample 19 has an average HLB value of 5.1.

[0052] [Prototype Example 20] A cleansing cosmetic preparation of Sample Example 20 was obtained in the same manner as Sample Example 16, except that the component (B) was 11 parts by weight of octyldodeceth-20 (B1) and 10 parts by weight of steareth-11 (B13). Sample Example 20 has an average HLB value of 12.0.

[0053] [Prototype Example 21] A cleansing cosmetic of Prototype Example 21 was obtained in the same manner as Prototype Example 1, except that the (A) component was 46 parts by weight, consisting of 23 parts by weight of ethylhexyl palmitate (A1), 15 parts by weight of tri(caprylic acid / capric acid)glyceryl (A2), and 8 parts by weight of mineral oil (A4), 10 parts by weight of octyldodeceth-5 (B14) and 11 parts by weight of PEG-8 diisostearate (B5) as the (B) component, 2 parts by weight of hydrogenated lecithin (C1) as the (C) component, 19.5 parts by weight of glycerin (D1) as the (D) component, 11 parts by weight of water as a solvent, 0 parts by weight (not added) of moisturizing agent as an additive, and 0.5 parts by weight of the preservative phenoxyethanol. The average HLB value of Prototype Example 21 was 6.5.

[0054] [Prototype Example 22] A cleansing cosmetic preparation as Sample Example 22 was obtained in the same manner as Sample Example 21, except that octyldodeceth-5 (B14) in component (B) was changed to octyldodeceth-10 (B15). Sample Example 22 has an average HLB value of 7.9.

[0055] [Prototype Example 23] A cleansing cosmetic preparation of Sample Example 23 was obtained in the same manner as Sample Example 21, except that octyldodeceth-5 (B14) in component (B) was changed to octyldodeceth-25 (B16). The average HLB value of Sample Example 23 was 9.8.

[0056] [Prototype Example 24] A cleansing cosmetic preparation of Sample Example 24 was obtained in the same manner as Sample Example 21, except that the component (B) was changed to 3 parts by weight of octyldodeceth-10 (B15), 3 parts by weight of octyldodeceth-25 (B16), and 15 parts by weight of PEG-8 diisostearate (B5). The average HLB value of Sample Example 24 was 7.7.

[0057] [Prototype Example 25] A cleansing cosmetic product of Prototype Example 25 was obtained in the same manner as Prototype Example 1, except that the (A) component was 28 parts by weight of ethylhexyl palmitate (A1), 20 parts by weight of tri(caprylic acid / capric acid)glyceryl (A2), and 8 parts by weight of mineral oil (A4), totaling 56 parts by weight, the (B) component was 6 parts by weight of octyldodeceth-5 (B14), and 15 parts by weight of PEG-8 diisostearate (B5), the (C) component was 2 parts by weight of hydrogenated lecithin (C1), the (D) component was 20.9 parts by weight of glycerin (D1), and the additive was 0.1 part by weight of the preservative phenoxyethanol. The average HLB value of Prototype Example 25 was 8.0.

[0058] [Prototype Example 26] A cleansing cosmetic preparation of Sample 26 was obtained in the same manner as Sample 25, except that the component (A) was changed to 23 parts by weight of ethylhexyl palmitate (A1), 15 parts by weight of caprylic / capric triglyceride (A2), 10 parts by weight of cyclopentasiloxane (A3), and 8 parts by weight of mineral oil (A4). The average HLB value of Sample 26 was 8.0.

[0059] [Prototype Example 27] A cleansing cosmetic of Prototype Example 27 was obtained in the same manner as Prototype Example 1, except that the (A) component was 46 parts by weight, consisting of 23 parts by weight of ethylhexyl palmitate (A1), 10 parts by weight of tri(caprylic acid / capric acid)glyceryl (A2), 8 parts by weight of mineral oil (A4), and 5 parts by weight of cetearyl alcohol (A5), 6 parts by weight of octyldodeceth-5 (B14) and 15 parts by weight of PEG-8 diisostearate (B5) as the (B) component, 2 parts by weight of hydrogenated lecithin (C1) as the (C) component, 19.5 parts by weight of glycerin (D1) as the (D) component, 11 parts by weight of water as a solvent, and 0.5 parts by weight of the preservative phenoxyethanol as an additive. The average HLB value of Prototype Example 27 was 8.0.

[0060] [Prototype Example 28] A cleansing cosmetic preparation of Sample Example 28 was obtained in the same manner as Sample Example 27, except that the component (A) was changed to 18 parts by weight of ethylhexyl palmitate (A1), 10 parts by weight of caprylic / capric triglyceride (A2), 8 parts by weight of mineral oil (A4), and 10 parts by weight of cetearyl alcohol (A5). The average HLB value of Sample Example 28 was 8.0.

[0061] [Prototype Example 29] A cleansing cosmetic preparation of Sample 29 was obtained in the same manner as Sample 27, except that the component (A) was changed to 23 parts by weight of ethylhexyl palmitate (A1), 10 parts by weight of caprylic / capric triglyceride (A2), 5 parts by weight of cyclopentasiloxane (A3), and 8 parts by weight of mineral oil (A4). The average HLB value of Sample 29 was 8.0.

[0062] [Prototype Example 30] A cleansing cosmetic preparation of Sample Example 30 was obtained in the same manner as Sample Example 27, except that the component (A) was changed to 18 parts by weight of ethylhexyl palmitate (A1), 10 parts by weight of caprylic / capric triglyceride (A2), 10 parts by weight of cyclopentasiloxane (A3), and 8 parts by weight of mineral oil (A4). The average HLB value of Sample Example 30 was 8.0.

[0063] The types and amounts of components (A) to (D), the amounts of solvents and additives, and the average HLB value of component (B) for each prototype are summarized in Tables 1 to 6.

[0064] [Table 1]

[0065] [Table 2]

[0066] [Table 3]

[0067] [Table 4]

[0068] [Table 5]

[0069] [Table 6]

[0070] [Evaluation of the properties of cleansing cosmetics and the formation of liquid crystal components] The properties of each prototype cleansing cosmetic were visually evaluated, and the presence or absence of liquid crystal components was also evaluated. The properties of each prototype were classified into three categories: "gel," "cream," and "liquid." Those in which the components were separated and did not mix were marked with "x" in the properties column. Those in which liquid crystal components were generated uniformly and in large quantities were marked with "◎," those in which liquid crystal components were generated but not uniformly were marked with "〇," those in which even a small amount of liquid crystal components was confirmed to be generated were marked with "△," and those in which no liquid crystal components were confirmed to be generated were marked with "x." In addition, 250x enlarged photographs of the cleansing cosmetic of each prototype are shown in Figures 1 to 20. The enlarged photograph shown in Figure 2 is of prototype 4 in which no liquid crystal components were generated, and photographs of the other prototypes in which no liquid crystal components were generated are omitted.

[0071] Next, the viscosity of each prototype cleansing cosmetic was measured in accordance with JIS Z 8803 (2011) using a TVB-15H viscometer (manufactured by Toki Sangyo Co., Ltd.) at a temperature of 25°C and a humidity of 50%.

[0072] [Evaluation of makeup removal performance] Furthermore, a makeup removal experiment was conducted using each prototype cleansing cosmetic in which liquid crystal components were generated, and the makeup removal performance was evaluated. 0.01g of foundation was spread within a 2cm square frame on the inside of the forearm, and 0.03g of the cleansing cosmetic to be evaluated was placed on the spread foundation and allowed to blend with the pads of the fingertips. At this time, the time until the foundation and the cleansing cosmetic blended together and the resistance of the fingertips became lighter was measured and was taken as the massage time. After that, the subject was slowly washed off with about 3ml of water while massaging, and the washed-out emulsion (water) was collected and observed for particle size. The massage time is shown in the table.

[0073] In addition, the particles in the emulsion washed out when makeup was washed off with the cleansing cosmetic were checked and the particle size and amount were evaluated. It can be said that the smaller the particles that were washed out and the greater the amount, the better the cleansing cosmetic for removing makeup. In the 1000x magnified photographs of particle sizes in Figures 20 to 37, particles smaller than 1 μm were marked as "◎", particles in the range of 1 to 5 μm were marked as "〇", particles larger than that were marked as "△", and particles with varying particle sizes were marked as "irregular". Regarding the amount of particles, in the 250x magnified photographs of particles in the emulsions shown in Figures 38 to 55, particles with a large amount of particles dispersed evenly throughout were marked as "◎", particles with many gaps and large intervals between particles and small amounts of particles were marked as "△", and anything in between was marked as "◯".

[0074] The properties of the cleansing cosmetic preparations for each prototype, the presence or absence of liquid crystal components, the viscosity, massage time, and particle size and amount are shown in Tables 7 to 12. The tables also list the numbers of the enlarged photographs (1000x and 250x) of the liquid crystal components and the washed-out particles.

[0075] [Table 7]

[0076] [Table 8]

[0077] [Table 9]

[0078] [Table 10]

[0079] [Table 11]

[0080] [Table 12]

[0081] [Results and Discussion] As shown in Tables 1 and 7 and Figures 1, 20, and 38, in Prototype 1, which used a surfactant with an HLB value of 13, a gel-like cleansing cosmetic product containing liquid crystal components and having high makeup removal performance was obtained. It was found that in Prototypes 2 to 4, in which a surfactant with an HLB value of less than 13 was used alone, no liquid crystal components were produced and the product separated. In addition, in Prototype 14, it was found that the combination of surfactant (B1), which produced liquid crystals in Prototype 1, and a single-chain surfactant (B13) did not produce liquid crystals even when the average HLB value was 8.0 or more.

[0082] As shown in Tables 1 to 3, Tables 7 to 9, Figures 4 to 9, Figures 22 to 27, and Figures 40 to 43, when looking at Prototypes 5 to 16 in which a surfactant (B1) with an HLB value of 13 or more is combined with other surfactants, it is understood that even if the average HLB value is 8.0 or more, liquid crystal components are not generated unless a surfactant with an alkyl group having 18 or more carbon atoms and a multi-chain type is combined. Furthermore, even if the property is gel-like, it is possible to obtain a gel with a high viscosity and a hard texture, or conversely, a gel with a low viscosity and a loose texture, and it was found that it is possible to obtain cleansing cosmetics with various textures without impairing the makeup removal performance. Furthermore, depending on the combination of surfactants, it is possible to make it cream-like, which shows that the property can be controlled, and it is also possible to adjust the massage time for removing makeup.

[0083] As shown in Table 4, Table 10, Figures 10-13, Figures 28-31, and 46-49, similarly, no liquid crystal components were observed in samples with an average HLB value of less than 8.0, while liquid crystal components were generated in samples with an average HLB value of 8.0 or more. In general, as the total amount of oil and the total amount of surfactant increases, makeup tends to come off faster, and in Samples 17 and 18, the massage time was shortened in line with this trend, demonstrating that it is possible to adjust the makeup removal speed while maintaining good makeup removal performance. As before, it was also shown that the viscosity can be changed even in gel form.

[0084] As shown in Tables 5, 11, Figures 14, 15, 32, 33, 50 and 51, when surfactants were prepared using octyldodeceth with different HLB values, it was found that octyldodeceth-25, which has a higher HLB value, produces liquid crystals, and it was shown that in order to produce liquid crystals, it is necessary to use a surfactant with an HLB value of at least 13.

[0085] As shown in Table 6, Table 12, Figures 16 to 19, Figures 34 to 37, and Figures 52 to 55, in prototypes 26 and 27, the properties were liquid without adding water as a solvent, and cleansing cosmetics with excellent makeup removal performance were obtained.

[0086] In prototypes 28 and 29, it was shown that the addition of higher alcohol resulted in a harder texture, and it was found that the addition of 10 parts by weight or more of higher alcohol resulted in a decrease in the liquid crystal component and the components separated without mixing. In prototype 30, it was shown that the addition of silicone resulted in a slightly harder texture and the massage time could be shortened. It was also found that the product provided an excellent feeling of freshness after rinsing.

[0087] As shown in Tables 7 to 12, the cleansing cosmetic product according to the prototype in which liquid crystal was generated was confirmed to have high makeup removal performance. In addition, the more liquid crystal component, the higher the makeup removal performance, indicating that the liquid crystal component contributes to good makeup removal. This indicates the usefulness of the so-called liquid crystal type cleansing cosmetic product containing the liquid crystal emulsion according to the present invention, and also indicates that it is possible to obtain a liquid crystal emulsion that allows the properties and texture of the cleansing cosmetic product to be freely controlled, and that it is possible to adjust it to suit the preferences and needs of the user. [Industrial Applicability]

[0088] According to the liquid crystal emulsion of the present invention, while maintaining good makeup removal performance, it is possible to arbitrarily select the properties when made into a cleansing cosmetic, and it is also possible to adjust the texture and makeup removal speed, so that it is possible to provide a cleansing cosmetic that meets the needs of the consumer. In addition, by diluting and emulsifying the liquid crystal emulsion, it can be used as a milky lotion, lotion, etc. The liquid crystal emulsion of the present invention can be produced without using a special surfactant and without going through complicated processes, so it is inexpensive and has excellent economic efficiency.

Claims

1. The composition contains 30 to 60 parts by weight of component (A), 10 to 30 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), 15 to 30 parts by weight of component (D), and 0 to 25 parts by weight of water as a solvent; The amount of higher alcohol added in the component (A) is less than 10 parts by weight, The component (B) contains octyldodeceth-20 or octyldodeceth-25 as a hydrophilic surfactant (b1) and a surfactant (b2) having a multi-chain alkyl group with 18 or more carbon atoms, and the average HLB value of the component (B) represented by the following formula (i) is 8.0 or more. A liquid crystal emulsion characterized in that (A): Oil (B): Surfactant (C): Phospholipids (D): Polyhydric alcohol [0010]

2. The liquid crystal emulsion according to claim 1, wherein the phospholipid of the component (C) is hydrogenated lecithin or lysolecithin.

3. The liquid crystal emulsion according to claim 1 or 2, which is a cleansing cosmetic.

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