Cleansing cosmetics

Abstract

To provide a cleansing cosmetic that is well compatible with make-up dirt, allows the make-up dirt to be easily washed away, and gives a moist feel after use.SOLUTION: A cleansing cosmetic contains a component (A) (poly) glycerol fatty acid ester, component (B) glycerol, component (C) a tetravalent or more polyhydric alcohol, and component (D) an oil solution that is liquid at 20°C and has a bicontinuous phase (D phase).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to cleansing cosmetics.

Background Art

[0002] Cleansing cosmetics are cosmetics used to remove oil stains caused by sebum, makeup cosmetics, etc. There are two types: oil-based cleansing cosmetics containing a high concentration of oil components that focus on removing normal oil-soluble components, and water-based cleansing cosmetics that aim to remove water-based stains and oil-based stains by washing with water. Although oil-based cleansing cosmetics have the advantage of excellent detergency against oil stains, they have the disadvantages of an oily feel and difficulty in removing water-based stains. Water-based cleansing cosmetics have the advantages of an excellent and refreshing feel and ease of removing water-based stains, but they have the disadvantage of limited detergency against oil stains.

[0003] In contrast, Patent Document 1 describes a cleansing cosmetic using liquid crystal, which is excellent in makeup removal and has a good feel after washing with water. However, since liquid crystal has a hard structure, there is a problem that the structure is difficult to collapse when washed away and it is difficult to phase-transition to an O / W emulsion that is easy to wash away with water.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a cleansing cosmetic that is compatible with makeup stains, can easily wash away makeup stains, and has a moist feel after use. [[ID=从40]] [Means for solving the problem]

[0006] The inventors of the present invention have conducted diligent studies to solve the above problems, (A) (Poly)glycerin fatty acid ester (B) Glycerin (C) Polyhydric alcohols with four or more valent values (D) Liquid oil at 20℃ We found that a cleansing cosmetic containing [the specified ingredient] solves the above problem. [Effects of the Invention]

[0007] The cleansing cosmetic of the present invention forms a D phase by combining glycerin with polyhydric alcohols of tetravalent or higher, resulting in excellent compatibility with makeup residue, easy phase conversion to an O / W emulsion during rinsing with water, and excellent moisturizing properties after washing. [Modes for carrying out the invention]

[0008] The embodiments for carrying out the present invention will be described in more detail below, but the scope of the present invention is not limited to these embodiments, and embodiments that have been modified or otherwise altered without impairing the spirit of the present invention also belong to the present invention. The notation "~" indicating the range includes both an upper and lower limit.

[0009] The (poly)glycerol fatty acid ester, which is component (A) used in the present invention, is obtained by an esterification reaction between (poly)glycerol and a fatty acid.

[0010] The (poly)glycerin constituting the (poly)glycerin fatty acid ester represents glycerin or polyglycerin, and polyglycerin is obtained by dehydrating and condensing glycerin. The (poly)glycerin used in the present invention is preferably (poly)glycerin with an average degree of polymerization of 1 to 10, such as glycerin, diglycerin, triglycerin, tetraglycerin, pentaglycerin, hexaglycerin, heptaglycerin, octaglycerin, nonaglycerin, and decaglycerin. Here, the average degree of polymerization is the average degree of polymerization (n) of polyglycerin calculated from the hydroxyl value by end-group analysis. Specifically, it is calculated from the following formulas (1) and (2). Molecular weight=74n+18...(1) Hydroxyl value = 56110(n+2) / Molecular weight ... (2)

[0011] The fatty acids constituting the (poly)glycerol fatty acid ester are preferably those with 8 to 22 carbon atoms, and more preferably those with 12 to 18 carbon atoms. Specifically, examples include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and behenic acid.

[0012] In the present invention, the (poly)glycerin fatty acid ester can exhibit an excellent makeup removal effect by using a combination of two or more polyglycerin fatty acid esters selected from various esters obtained from the above-mentioned combination of (poly)glycerin and fatty acids. In particular, it is preferable to combine (a1) a (poly)glycerin fatty acid ester whose constituent fatty acids consist of one or more selected from the group consisting of unsaturated fatty acids and branched fatty acids, and (a2) one or more (poly)glycerin fatty acid esters selected from the group consisting of straight-chain fatty acids.

[0013] Specifically, examples of substances corresponding to (a1) include polyglyceryl-2 oleate, polyglyceryl-4 oleate, polyglyceryl-6 oleate, polyglyceryl-6 pentaoleate, polyglyceryl-10 oleate, polyglyceryl-2 isostearate, polyglyceryl-4 isostearate, polyglyceryl-6 isostearate, polyglyceryl-10 isostearate, polyglyceryl-10 diisostearate, and polyglyceryl-10 pentaisostearate. In addition, examples of substances corresponding to (a2) include glyceryl stearate, polyglyceryl-4 stearate, polyglyceryl-6 stearate, polyglyceryl-10 stearate, polyglyceryl-4 tristearate, polyglyceryl-6 tristearate, polyglyceryl-6 pentastearate, polyglyceryl-10 distearate, polyglyceryl-10 tristearate, polyglyceryl-4 laurate, polyglyceryl-6 laurate, polyglyceryl-10 laurate, and polyglyceryl-10 myristate.

[0014] Furthermore, the HLB of component (A) is preferably 8 to 15, more preferably 9 to 14, and most preferably 11 to 14. When two or more types of component (A) are used, the mixed HLB is preferably 8 to 15, more preferably 9 to 14, and most preferably 11 to 14. A better makeup removal effect is achieved when the HLB of component (A) or the mixed HLB is within the range of 8 to 15. Here, HLB refers to the value calculated from the Atlas method, and more specifically, it is calculated from formula (3) below. Mixed HLB refers to the sum of the results obtained by multiplying the HLB of each (poly)glycerin fatty acid ester by their respective weight ratios. HLB = 20 × (1 - S / A) ... (3) S: Saponification value of polyglycerol fatty acid esters A: Neutralization value of raw fatty acids

[0015] The content of component (A) in the cleansing cosmetic of the present invention is not particularly limited as long as the desired effect is imparted, but is preferably 1 to 20% by weight, and more preferably 3 to 20% by weight, based on the total amount of the cleansing cosmetic. A better makeup removal effect is exhibited when the content of component (A) is within the range of 1 to 20% by weight. Furthermore, the mass ratio ((a1):(a2)) of (a1):(a2) in component (A) is preferably 95:5 to 20:80, more preferably 95:5 to 30:70, and even more preferably 90:10 to 40:60.

[0016] As component (B) used in the present invention, concentrated glycerin for cosmetic use manufactured by Sakamoto Pharmaceutical Co., Ltd. is preferably used.

[0017] There are no particular limitations on the polyhydric alcohol with a tetravalent or higher nucleotide value used as component (C) in the present invention, but examples include polyglycerin, sorbitol, trehalose, and xylitol. Among these, polyglycerins with an average degree of condensation of 2 to 10, such as diglycerin, triglycerin, tetraglycerin, pentaglycerin, hexaglycerin, heptaglycerin, octaglycerin, nonaglycerin, and decaglycerin, are preferably used.

[0018] The amounts of component (B) and component (C) in the cleansing cosmetic composition of the present invention are preferably 30 to 80% by weight, and more preferably 50 to 80% by weight.

[0019] The component (D) used in the present invention, which is a liquid oil at 20°C, is not particularly limited, but examples include olive oil, meadowfoam oil, caprylic / capric triglyceride, triethylhexanoin, jojoba oil, isotridecyl isononanoate, isononyl isononanoate, ethylhexyl palmitate, isostearyl isostearate, mineral oil, squalane, dodecane, hydrogenated polyisobutene, cyclopentasiloxane, and dimethicone.

[0020] The cleansing cosmetic of the present invention can be easily obtained by adding the (B) component and the (C) component little by little while stirring them into the above (A) component, adding and mixing water as necessary, and adding and mixing the (D) component little by little while stirring. The water content of the present invention is appropriately selected depending on the other components and their contents, but is preferably 0.1 to 40% by weight, more preferably 0.1 to 20% by weight.

[0021] The "bicontinuous phase (D phase)" of the cleansing cosmetic of the present invention refers to a state in which the aqueous phase and the oil phase are three-dimensionally continuous, neither the aqueous phase nor the oil phase is phase-separated, and they coexist, and can be confirmed by observing flow birefringence with a polarizing plate. Here, "flow birefringence" refers to a phenomenon in which when an optically isotropic solution flows due to shaking or the like, the structure is oriented in the direction of flow and exhibits birefringence.

[0022] The cleansing cosmetic of the present invention can contain any components usually used in cosmetics as long as the effects of the present invention are not impaired.

[0023] Such optional ingredients include, for example, palm oil, liquid lanolin, hydrogenated coconut oil, hydrogenated oil, Japanese wax, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, privet wax, lanolin, reduced lanolin, hard lanolin, jojoba wax and other waxes, higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol Higher alcohols such as ethanol, moisturizing ingredients such as sodium pyrrolidone carboxylate, lactic acid, sodium lactate, guar gum, quince seed, carrageenan, galactan, gum arabic, pectin, mannan, starch, xanthan gum, curdlan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, chondroitin sulfate, dermatan sulfate, glycogen, heparan sulfate, hyaluronic acid, sodium hyaluronate, tragacanth gum, keratan sulfate, chondroitin, mucoitin Thickeners such as droxyethyl guar gum, carboxymethyl guar gum, dextran, keratosulfate, locust bean gum, succinoglucan, carotenic acid, chitin, chitosan, carboxymethyl chitin, agar, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, sodium polyacrylate, polyethylene glycol, etc., which may have a surface treatment, powders such as mica, silica, calcium carbonate, magnesium carbonate, aluminum oxide, barium sulfate, etc., which may have a surface treatment, red iron oxide, yellow iron oxide, black iron oxide, cobalt oxide Inorganic pigments such as ultramarine, Prussian blue, titanium dioxide, and zinc oxide; pearlescent agents such as titanium mica, fish scale foil, and bismuth oxychloride, which may be surface-treated; organic pigments such as Red 202, Red 228, Red 226, Yellow 4, Blue 404, Yellow 5, Red 505, Red 230, Red 223, Orange 201, Red 213, Yellow 204, Yellow 203, Blue 1, Green 201, Violet 201, and Red 204, which may be lake-formed; organic powders such as polyethylene powder, polymethyl methacrylate, nylon powder, and organopolysiloxane elastomers.Examples of preferred UV absorbers include para-aminobenzoic acid-based UV absorbers, anthranilic acid-based UV absorbers, salicylic acid-based UV absorbers, cinnamic acid-based UV absorbers, benzophenone-based UV absorbers, sugar-based UV absorbers, UV absorbers such as 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole and 4-methoxy-4'-t-butyldibenzoylmethane; vitamin A or its derivatives; vitamin B derivatives such as vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or its derivatives, vitamin B12, vitamin B15 or its derivatives; vitamin E derivatives such as α-tocopherol, β-tocopherol, γ-tocopherol, and vitamin E acetate; vitamin D derivatives; vitamin H; pantothenic acid, pantethine, pyrroloquinoline quinone; and antibacterial agents such as phenoxyethanol. [Examples]

[0024] The present invention will be specifically described below with reference to examples, but the scope of the invention is not limited by these examples. All amounts in the examples are in weight percent.

[0025] Cleansing cosmetics for Examples 1 and 2 and Comparative Examples 1 and 2 were prepared according to the compositions listed in Table 1. [Sample preparation] Components 1-3 were gradually added to components 4-7 while heating and stirring at 70°C, and component 8 was added and mixed. Components 9 and 10, heated at 70°C, were then gradually added while stirring. Subsequently, components 11-13, heated at 70°C, were gradually added while stirring to obtain the cleansing cosmetics for each example and comparative example. The mixed HLB of components 1-3 was 13.

[0026] [Evaluation method: Observation of phase state] The phase state was determined by observing the flow birefringence using a polarizing plate, based on the following criteria. The results are shown in Table 1. <Judgment criteria> D:D phase In optically isotropic solutions, flow birefringence can be observed using a polarizing plate. LC: liquid crystal phase In optically anisotropic solutions, birefringence can be observed using a polarizing plate.

[0027] [Evaluation method: Evaluation of user experience] An appropriate amount of lipstick (product name: Lipstick (Refill) 550, manufactured by Chifure Cosmetics Co., Ltd.) was applied to the inner side of the forearm. 0.2g of each cleansing cosmetic from the example and comparative examples was then applied, and the cleansing motion was performed 15 times with the fingers, evaluating the degree of blending with makeup. Afterwards, the product was rinsed with running water, and the ease of washing away makeup (cleansing effect) and the moisturizing effect after use were evaluated. The evaluation was conducted on 20 subjects, and the results were judged according to the evaluation criteria below. The results are shown in Table 1. <Evaluation criteria for how well it blends with dirt> ◎: 18-20 people responded that it blends well with makeup stains. ○: 14-17 people responded that it blends well with makeup stains. △: 10-13 people responded that it blends well with makeup stains. ×: 0-9 people responded that it blends well with makeup stains. <Criteria for evaluating cleansing effectiveness> ◎: 18-20 people responded that it rinsed off thoroughly. ○: 14-17 people responded that it was sufficient to rinse thoroughly. △: 10-13 people responded that it rinsed off thoroughly. ×: 0-9 people answered that it rinsed off sufficiently. <Evaluation criteria for moisturizing effect after cleansing> ◎: 18-20 people responded that it had a moisturizing feel. ○: 14-17 people responded that it had a moisturizing feel. △: 10-13 people responded that it had a moisturizing feel. ×: 0-9 people responded that it had a moisturizing feel.

[0028] [Table 1]

[0029] The results in Table 1 show that the cleansing cosmetics of Examples 1 and 2 contained components (A) to (D) and formed phase D, resulting in better compatibility with makeup residue and superior rinsing effect compared to the cleansing cosmetics of Comparative Examples 1 and 2. Furthermore, a moisturizing feeling was achieved after use.

Claims

1. A cleansing cosmetic characterized by containing the following components (A) to (D), wherein the total content of components (B) and (C) is 30 to 80% by weight, and the phase state is a bicontinuous phase (phase D) (excluding transparent cleansing materials containing 5% by mass of polyglyceryl-10 diisostearate, 12% by mass of polyglyceryl-20 dicaprate, 5% by mass of glycerin, 5% by mass of diglycerin, 10% by mass of triethylhexanoin, 3% by mass of caprylyl (caprylic / capric acid), 2% by mass of dicaprylyl ether, 0.1% by mass of meadowfoam oil, and 0.1% by mass of tocopherol). (A) (Poly)glycerol fatty acid esters (excluding esters of linear fatty acids with 6 to 10 carbon atoms and polyglycerol, where the ratio of the degree of polymerization of polyglycerol to the number of fatty acid bonded residues per molecule (degree of polymerization of polyglycerol / number of fatty acid bonded residues) is 2.5 to 3.5) (B) Glycerin (C) Polyglycerin (D) Liquid oil at 20°C

2. The cleansing cosmetic according to claim 1, characterized in that it contains, as component (A), (a1) a (poly)glycerin fatty acid ester in which the constituent fatty acid is one or more selected from the group consisting of unsaturated fatty acids and branched fatty acids, and (a2) a (poly)glycerin fatty acid ester in which the constituent fatty acid is one or more selected from the group consisting of straight-chain fatty acids.

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