Oil-in-water type emulsified cosmetic

Abstract

The present invention aims to provide a cosmetic that maintains smoothness upon application, imparts firmness and moisture to the skin, and provides an excellent feel when used, such as a good fit to the skin.The present invention relates to an oil-in-water emulsion cosmetic that contains (A) at least one higher alcohol selected from those having 14 to 22 carbon atoms; (B) a hydrophilic nonionic surfactant; (C) an oil; and (D) 0.5 to 1.5% by mass of a water-soluble thickener, wherein the (C) oil comprises 1 to 5% by mass of a (C1) solid oil and a (C2) liquid oil, based on the total mass of the cosmetic, and the cosmetic has a hardness (8φ needle, 25°C) of 5 to 19. [Selection diagram] None

Description

Technical Field

[0001] The present invention relates to an oil-in-water type emulsified cosmetic. More specifically, the present invention relates to an oil-in-water type emulsified cosmetic having appropriate hardness, excellent fit when applied, capable of realizing skin moistness and firmness, and particularly suitable for use around the eyes.

Background Art

[0002] It is known that the skin of a person's face or the like loses firmness and elasticity due to external stimuli such as aging, dryness, and ultraviolet rays, resulting in sagging and wrinkles. To care for these skin problems, moisturizing is effective, and it has been conventionally practiced to prevent wrinkles and sagging and maintain or improve the state of moist and youthful skin by using external skin preparations such as moisturizing creams containing moisturizing agents.

[0003] Among external skin preparations that impart firmness to the skin, film-forming agents typified by polyvinyl alcohol are blended, and by adjusting other components and blending amounts to be simultaneously blended, suppression of stickiness and improvement of storage stability are achieved (Patent Document 1).

[0004] Patent Document 2 discloses that in an oil-in-water type emulsified composition capable of imparting firmness, the temporal stability of a blended salt-type whitening agent has been improved (Patent Document 2).

[0005] Among the face, the area around the eyes (the eye area) has thinner skin than other parts, and capillaries are visible through the skin, so it is likely to appear dark as "dark circles" when blood flow stagnates. Also, the movement of the skin due to blinking is intense, so the amount of melanin increases and dryness is promoted. As a result, firmness is easily lost, wrinkles and sagging are also likely to occur, and they tend to be prominent.

[0006] Since the skin around the eyes is sensitive, conventional topical skin agents containing film-forming agents may cause a tight feeling on the skin and discomfort. Patent Document 3 discloses a cosmetic specialized for use around the eyes. By blending a copolymer of 2-methacryloyloxyethyl phosphorylcholine and a hydrophobic monomer, acetylated hyaluronic acid, and a polyhydric alcohol, it is said to improve the loss of firmness of the skin and the occurrence of wrinkles and sagging, without causing a tight feeling.

[0007] However, conventional cosmetics (topical agents) such as those described in Patent Documents 1 to 3 may have low viscosity and lack a proper fit to the skin. Particularly in cosmetics applied around the eyes, it is required to improve the usability such as the fit to the skin by imparting appropriate firmness.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Disclosure of the Invention

Problems to be Solved by the Invention

[0009] The present invention has been made in view of such problems of the prior art, and an object thereof is to provide a cosmetic that provides a firm feeling and a moist feeling (moisture) to the skin while maintaining smoothness during application, and is excellent in usability such as the fit to the skin.

Means for Solving the Problems

[0010] As a result of intensive research to solve the above problems, the inventors have found that in an oil-in-water type emulsified cosmetic containing a higher alcohol and a hydrophilic nonionic surfactant, by blending a predetermined amount of solid oil in the oil phase and a predetermined amount of water-soluble thickener in the aqueous phase to obtain a viscosity of a predetermined value or more, it has the effect of imparting elasticity and firmness to the skin, and when applied, it has a soft and smooth feel, excellent fit to the skin, and can provide a firm feeling without causing a tight feeling while giving a moist feeling, thus completing the present invention.

[0011] That is, the present invention is (A) At least one selected from higher alcohols having 14 to 22 carbon atoms; (B) A hydrophilic nonionic surfactant; (C) An oil component; and (D) An oil-in-water type emulsified cosmetic containing 0.5 to 1.5% by mass of a water-soluble thickener, wherein the (C) oil component contains (C1) a solid oil component and (C2) a liquid oil component in amounts of 1 to 5% by mass based on the total amount of the cosmetic, and the hardness (needle 8φ, 25 °C) of the cosmetic is 5 to 19.

Effect of the Invention

[0012] According to the oil-in-water type emulsified cosmetic of the present invention, it has the effect of imparting elasticity and firmness to the skin, and when applied, it has a soft and smooth feel, excellent fit to the skin, and can provide elasticity, firmness, and a moist feeling to the skin without causing a tight feeling. Further, even when a salt-type whitening agent is blended, it has excellent stability over time and can exhibit an excellent whitening effect.

Embodiment for Carrying Out the Invention

[0013] The oil-in-water type emulsified cosmetic of the present invention (hereinafter, also simply referred to as "emulsified cosmetic") contains (A) at least one selected from higher alcohols having 14 to 22 carbon atoms; (B) a hydrophilic nonionic surfactant; (C) an oil component; and (D) a water-soluble thickener. Each component will be described in detail below.

[0014] Component (A) in the emulsified cosmetic of the present invention is a higher alcohol having 14 to 22 carbon atoms. Specific examples include myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, oleyl alcohol and the like. One or more of these higher alcohols are used. In particular, those having a linear saturated alkyl group are preferred, and among them, it is preferable that one or more selected from cetyl alcohol, stearyl alcohol, and behenyl alcohol are included.

[0015] The blending amount of the higher alcohol (Component A) in the emulsified cosmetic of the present invention is usually 0.01 to 10% by mass, preferably 0.05 to 8% by mass, more preferably 0.1 to 5% by mass.

[0016] Component (B) in the emulsified cosmetic of the present invention is a hydrophilic nonionic surfactant. As used herein, "hydrophilic" means that the value of HLB (Hydrophilic-Lipophilic Balance) determined by the relative strength of the hydrophilic group and the lipophilic group is 8 or more, preferably 10 or more.

[0017] The hydrophilic nonionic surfactant in the present invention is preferably selected from polyoxyethylene alkyl ethers. In particular, those having a structure in which a linear saturated alkyl chain and a polyoxyethylene chain are bonded by an ether bond are preferred.

[0018] Examples of the hydrophilic nonionic surfactant (Component B) used in the present invention include those having an average molar number of polyoxyalkylene chains of 2 to 50, preferably 10 to 30, that is, polyoxyethylene (2 to 50) alkyl ether, preferably polyoxyethylene (10 to 30) alkyl ether.

[0019] Specific examples include, for example, polyoxyethylene(10) stearyl ether, polyoxyethylene(11) stearyl ether, polyoxyethylene(20) stearyl ether, polyoxyethylene(30) stearyl ether, polyoxyethylene(20) behenyl ether, polyoxyethylene(30) behenyl ether, etc. Among these, polyoxyethylene(20) behenyl ether is particularly preferably used.

[0020] In the emulsified cosmetic of the present invention, the blending amount of the hydrophilic polyoxyethylene alkyl ether is usually 0.01 to 10% by mass, preferably 0.05 to 8% by mass, more preferably 0.1 to 5% by mass.

[0021] The oil component (C) in the emulsified cosmetic of the present invention contains a solid oil component (C1) and a liquid oil component (C2). (C1) The solid oil component is a solid that does not show fluidity at normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 4 Pa)), and can be defined as, for example, an oil component having a melting point of about 100°C or higher. Specific examples of the solid oil component include hydrocarbon waxes such as paraffin wax (linear hydrocarbon), microcrystalline wax (branched saturated hydrocarbon), ceresin wax, beeswax, montan wax, Fischer-Tropsch wax, etc., solid fats and oils such as cocoa butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, mutton fat, hydrogenated castor oil, etc., polar waxes such as sucrose acetate stearate, ethylene glycol fatty acid (C18-30) ester, etc., beeswax, lanolin, carnauba wax, candelilla wax, rice bran wax, Japan wax, jojoba oil, nuc wax, kapok wax, barberry wax, shellac wax, sugarcane wax, isopropyl lanolin fatty acid, hexyl laurate, reduced lanolin, hard lanolin, polyoxyethylene (hereinafter abbreviated as "POE") lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, polyethylene glycol lanolin fatty acid, POE hydrogenated lanolin alcohol ether, etc., higher fatty acids such as myristic acid, palmitic acid, stearic acid, behenic acid, etc., (acrylates / acrylic acid stearyl / methacrylic acid dimethicone) copolymer, (acrylates / acrylic acid behenyl / methacrylic acid dimethicone) copolymer, alkyl methicone, alkyl dimethicone, alkyl dimethylsilyl polypropylsilsesquioxane, stearoxytrimethylsilane, etc. silicone waxes and the like. Among these, hydrocarbon waxes are preferred, and microcrystalline wax is particularly preferred. However, the solid higher alcohol corresponding to the component (A) is not included in the (C1) solid oil component.

[0022] The emulsified cosmetic of the present invention essentially contains a (C1) solid oil component in the (C) oil component, thereby maintaining an appropriate hardness of the cosmetic. The blending amount of the (C1) solid oil component is 1 to 5% by mass, preferably 1.5 to 4.5% by mass, more preferably 2 to 4% by mass based on the total amount of the cosmetic.

[0023] The (C2) liquid oil component in the present invention refers to a liquid at normal temperature (25 ° C) and normal pressure (1 atmospheric pressure (9.8 × 10 4It is in a liquid state having fluidity in Pa)), and can be defined as, for example, an oil component having a melting point of 25°C or lower. The liquid oil component is classified into a non-volatile oil and a volatile oil based on its properties.

[0024] The non-volatile liquid oil in this specification means a liquid oil component that does not show volatility at normal temperature (25°C) and normal pressure (1 atmosphere (9.8×10 4 Pa)) (for example, an oil component having a boiling point of about 200°C or higher at normal pressure is applicable), and includes, for example, liquid oils and fats such as hydrocarbon oils and vegetable oils, ester oils, high molecular weight polyoxyalkylene glycols, silicone oils, etc.

[0025] Specific examples of the non-volatile liquid oil include liquid oils and fats such as linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, cinnamon oil, jojoba oil, grape oil, almond oil, rapeseed oil, sesame oil, sunflower oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, egg yolk oil, liver oil, triglyceride, glyceryl trioctanoate, glyceryl triisopalmitate; octanoic acid esters such as cetyl octanoate, isooctanoic acid esters such as glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, lauric acid esters such as hexyl laurate, myristic acid esters such as isopropyl myristate, octyldodecyl myristate, palmitic acid esters such as octyl palmitate, stearic acid esters such as isocetyl stearate, isostearic acid esters such as isopropyl isostearate, isopalmitic acid esters such as octyl isopalmitate, oleic acid esters such as isodecyl oleate, adipic acid diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacate, ester oils such as diisostearyl malate; hydrocarbon oils such as liquid paraffin, squalane; polyoxybutylene polyoxypropylene glycol and the like. Examples of the non-volatile silicone oil include, for example, methylpolysiloxane (6 cs), methylpolysiloxane (20 cs), methylpolysiloxane (100 cs), methylphenylpolysiloxane, amino-modified silicone, fluorine-modified dimethylpolysiloxane and the like.

[0026] The volatile oil blended in the cosmetic of the present invention includes a volatile hydrocarbon oil and a volatile silicone oil. The volatile hydrocarbon oil is not particularly limited as long as it is a hydrocarbon oil having volatility at normal temperature (25 ° C) and normal pressure (1 atmospheric pressure (9.8 × 10 4 Pa)) and has been conventionally used in cosmetics and the like (for example, a hydrocarbon having a boiling point of less than 200 ° C). Specific examples include, for example, isododecane, isohexadecane, hydrogenated polyisobutene and the like.

[0027] Volatile silicone oils are silicone oils that have been conventionally used in cosmetics and the like and are volatile at normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 4 Pa)), such as silicone oils with a boiling point of less than 200°C, and include volatile linear silicone oils (volatile dimethicone) and volatile cyclic silicone oils (volatile cyclodimethicone).

[0028] As the volatile dimethicone, dimethylpolysiloxane with a low viscosity (for example, a viscosity of about 100 to 500 mPa·s at 30°C), such as decamethyltetrasiloxane, can be used. Commercially available products include KF-96L-1.5cs, KF-96L-2cs (both manufactured by Shin-Etsu Chemical Co., Ltd.), etc. Examples of the volatile cyclodimethicone include decamethylcyclopentasiloxane.

[0029] In the emulsified cosmetic of the present invention, it is preferable to blend at least one non-volatile hydrocarbon oil and at least one volatile hydrocarbon oil in combination. Among them, it is preferable to select squalane as the non-volatile hydrocarbon oil and isododecane as the volatile hydrocarbon oil. By adopting such a mode, the feeling of use when applying the cosmetic can be further improved.

[0030] In addition, the oil component (C) in the emulsified cosmetic of the present invention may generally be blended with other oil components that are not classified into the above-mentioned (C1) solid oil component or (C2) liquid oil component, as long as the effects of the present invention are not inhibited. Examples of other oil components include (C3) semi-solid oil components and (C4) oil-soluble ultraviolet absorbers.

[0031] (C3) semi-solid oil components show some fluidity at normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×104 Pa)), but are oils that do not fall under the category of (C2) liquid oil components (for example, oils with a melting point of less than about 100°C and a boiling point of 200°C or higher). For example, petrolatum, hydrogenated palm oil, palm kernel oil, macadamia nut oil phytosterol, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), etc. can be mentioned.

[0032] (C4) Examples of the oil-soluble ultraviolet absorber include benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid, monoglycerin ester of para-aminobenzoic acid, ethyl ester of N,N-dipropoxy para-aminobenzoic acid, and ethyl ester of N,N-dimethyl para-aminobenzoic acid; anthranilic acid-based ultraviolet absorbers such as homomethyl-N-acetylanthranilate; salicylic acid-based ultraviolet absorbers such as amyl salicylate, homomethyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanolphenyl salicylate; cinnamic acid-based ultraviolet absorbers such as octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, propyl-p-methoxy cinnamate, isoamyl-p-methoxy cinnamate, octyl-p-methoxy cinnamate (2-ethylhexyl-p-methoxy cinnamate), 2-ethoxyethyl-p-methoxy cinnamate, 2-ethylhexyl-α-cyano-β-phenyl cinnamate, and glyceryl mono-2-ethylhexanoyl-di-p-methoxy cinnamate; benzophenone-based ultraviolet absorbers such as 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, and 2-ethylhexyl-4'-phenylbenzophenone-2-carboxylate; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urocanic acid, ethyl ester of urocanic acid, 2,2'-hydroxy-5-methylphenyl benzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl) benzotriazole, dibenzalazine, dianisoyl methane, 4-methoxy-4'-t-butyldibenzoyl methane, 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one, and the like.

[0033] In the emulsified cosmetic of the present invention, the blending amount of the (C) oil component is not particularly limited, but the total of (C1) solid oil component, (C2) liquid oil component, optionally (C3) semi-solid oil component, and (C4) oil-soluble ultraviolet absorber is preferably 10 to 40% by mass, more preferably 15 to 38% by mass, and still more preferably 20 to 35% by mass with respect to the total amount of the cosmetic.

[0034] In the emulsified cosmetic of the present invention, it is considered that the (A) higher alcohol, (B) hydrophilic nonionic surfactant, and (C2) liquid oil component form a so-called α-gel structure together with the external-phase water to maintain stable emulsification.

[0035] The (D) water-soluble thickener in the emulsified cosmetic of the present invention is a water-soluble thickener that can be usually used in cosmetics. Specific examples include vinyl-based polymers such as polyvinyl methyl ether and carboxyvinyl polymer, polyoxyethylene-based polymers, polyoxyethylene polyoxypropylene copolymer-based polymers, acrylic-based polymers such as polyethyl acrylate and polyacrylamide, polyethyleneimine, cationic polymers, inorganic water-soluble polymers such as bentonite, magnesium aluminum silicate, laponite, hectorite, and silicic anhydride, PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer, (dimethylacrylamide / acryloyldimethyltaurine Na) cross-polymer, (sodium acrylate / acryloyldimethyltaurine) copolymer, (alkyl acrylate / methacrylic acid stearyl-20) copolymer, (acryloyldimethyltaurine ammonium / VP) copolymer, etc. The emulsified cosmetic of the present invention may not contain polyvinyl alcohol which is said to give a firm feeling, and when it is contained, the blending amount is 0.3% by mass or less.

[0036] In addition to the above, plant polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed (quince), algocolloid (brown seaweed extract), etc.; microbial polymers such as dextran, succinoglucan, pullulan, etc., animal polymers such as collagen, casein, albumin, gelatin, etc.; starch polymers such as starch (rice, corn, potato, wheat), carboxymethyl starch, methyl hydroxypropyl starch, etc.; cellulose polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.; alginic acid polymers such as sodium alginate, propylene glycol alginate, etc. can be exemplified.

[0037] In the present invention, it is particularly preferable to use a (dimethylacrylamide / sodium acryloyldimethyltaurate) copolymer as the (D) water-soluble thickener from the viewpoint of imparting appropriate hardness.

[0038] The blending amount of the (D) water-soluble thickener in the emulsified cosmetic of the present invention is in the range of 0.5 to 1.5% by mass, preferably 0.6 to 1.3% by mass, more preferably 0.7 to 1.2% by mass. If the blending amount of the water-soluble thickener (component D) is less than 0.5% by mass, appropriate hardness cannot be achieved, and if it is blended in excess of 1.5% by mass, stickiness may occur.

[0039] The emulsified cosmetic of the present invention is characterized in that its hardness (rheometer, needle 8φ, 25°C) is 5 to 19, preferably 8 to 19. By adjusting the hardness as described above, it will have an excellent fit feeling when applied.

[0040] The present inventors have found that the fit feeling when the emulsified cosmetic is applied correlates with the average vibration energy measured by the following method.

[0041] · Method for Measuring Average Vibration Energy Attach a three-axis acceleration sensor (for example, manufactured by Techno Kiban Co., Ltd., model: A3AX) to the side of the index finger nail of one hand of the subject. Drop 20 μL of the cosmetic onto the skin on the inner side of the forearm of the other hand and spread it. While contacting the index finger with the surface of the spread cosmetic (a 2 cm × 6 cm area), move the fingertip of the index finger back and forth at a speed of 1 reciprocation / 1 second while applying a force of 0.1 to 0.5 N. Continue the above operation for 60 seconds immediately after dropping and spreading the cosmetic (0 seconds), and detect the vibration during that period with the above three-axis acceleration sensor. Next, calculate the vibration energy at each second and each frequency by performing short-time Fourier transform on the vibration data detected by the three-axis acceleration sensor.

[0042] When examining the correlation between the average vibration energy obtained by the above method and the fit feeling of the cosmetic (base), it was found that the fit feeling of the cosmetic is particularly excellent when the average vibration energy satisfies any one of the following conditions, preferably two or more. (1) In the frequency range of 80 to 90 Hz at 20 seconds to 60 seconds after dropping and spreading the cosmetic, it is greater than 3.75×10 -6 and less than or equal to 5.31×10 -6 , preferably greater than or equal to 3.80×10 -6 and less than or equal to 5.31×10 -6 . (2) In the frequency range of 10 to 20 Hz at 40 seconds to 60 seconds after dropping and spreading the cosmetic, it is greater than 6.21×10 -5 and less than or equal to 9.14×10 -5 , preferably greater than or equal to 6.25×10 -5 and less than or equal to 9.14×10 -5 . (3) In the frequency range of 150 to 200 Hz from immediately after dropping and spreading the cosmetic (0 seconds) to 30 seconds, it is greater than 8×10 -7 and less than or equal to 2×10 -6 . (4) In the frequency range of 300 to 500 Hz from immediately after dropping and spreading the cosmetic (0 seconds) to 30 seconds, it is greater than 3.4×10 -7 and less than or equal to 1.5×10 -6As follows. (5) After dropping and spreading the cosmetic, in the frequency range of 150 to 300 Hz at 30 seconds to 60 seconds, 1.41×10 -6 Greater than 2.2×10 -6 As follows.

[0043] Among the above conditions, it is particularly preferable to use a cosmetic that satisfies both condition (1) and condition (2) from the viewpoint of excellent fit. Therefore, an emulsified cosmetic is prepared so as to satisfy the requirements of the compounding components, compounding amounts, and hardness described in claim 1 to be described later, and the average vibration energy of the prepared emulsified cosmetic is measured according to the above method, and a cosmetic whose average vibration energy satisfies the conditions (1) and (2) above is selected, whereby an emulsified cosmetic of the present invention having particularly excellent fit can be obtained.

[0044] In addition to the above components, the emulsified cosmetic of the present invention may be appropriately blended with components usually used in external skin preparations such as cosmetics and quasi-drugs, for example, various drugs such as humectants, powder components, and whitening agents, as necessary.

[0045] Examples of the humectant include polyhydric alcohols, hyaluronic acid and its derivatives, sugar alcohols such as trehalose, cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, diglycerin ethylene oxide·propylene oxide adducts, and the like.

[0046] Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, polyethylene glycol, and the like.

[0047] Examples of the powder components include inorganic powders such as talc, kaolin, mica, sericite, phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soaps (such as zinc myristate, calcium palmitate, aluminum stearate, etc.), boron nitride, organic powders such as polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, polymethylsilsesquioxane powder, cellulose powder, inorganic pigments such as titanium dioxide, zinc oxide, iron oxide (red iron oxide), iron titanate, yellow iron oxide, black iron oxide, carbon black, lower titanium oxide, manganese violet, cobalt violet, chromium oxide, ultramarine, dark blue, pearl pigments such as titanium dioxide-coated mica, titanium dioxide-coated bismuth oxychloride, colored titanium dioxide-coated mica, bismuth oxychloride, fish scale foil, metal powder pigments such as aluminum powder, organic pigments such as Red No. 201, Red No. 202, Orange No. 203, Yellow No. 205, Yellow No. 401, Blue No. 404, organic pigments such as zirconium, barium, aluminum lakes of Red No. 3, Yellow No. 4, Green No. 3, Blue No. 1, and natural pigments such as chlorophyll, β-carotene, etc. Examples of the synthetic resin emulsion include acrylic resin emulsion, polyvinyl acetate resin emulsion, etc.

[0048] Examples of the various agents include other whitening agents such as vitamin C and its derivatives, vitamin A and its derivatives, alkoxysalicylic acid and its derivatives, arbutin, kojic acid, etc. In addition, sequestering agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, agents such as caffeine, tannin, verapamil, tranexamic acid and its derivatives, licorice extract, glabridin, hot water extract of pyracantha fruit, various crude drugs, tocopheryl acetate, glycyrrhizic acid and its derivatives or salts thereof, etc. are included.

[0049] The water-in-oil type emulsified cosmetic of the present invention can be provided in the form of emulsions, creams, lotions, foundations, makeup bases, etc., and is not particularly limited. Since the emulsified cosmetic of the present invention has an appropriate hardness, it is particularly suitable for eye cosmetics such as eye creams.

Examples

[0050] The present invention will be further described in detail with reference to the following examples, but the present invention is not limited thereto. The blending amounts are shown in mass% unless otherwise specified.

[0051] (Test Examples 1 to 4) Water-in-oil type emulsified cosmetics were prepared according to the formulations shown in Table 1 below. Next, the characteristics of each of the prepared water-in-oil type emulsified cosmetics were evaluated. The evaluation methods are as follows.

[0052] <Measurement of the feeling of fit by average vibration energy> ·Measurement method Using the emulsified cosmetics of each example, the average vibration energy was measured according to the method described in paragraph 0041 above. Then, the average vibration energy in the frequency range of 80 to 90 Hz at 20 to 60 seconds after dropping and spreading the cosmetic, and (2) the average vibration energy in the frequency range of 10 to 20 Hz at 40 to 60 seconds after dropping and spreading the cosmetic were calculated. The results are shown in Table 1.

[0053] <Sensory test> The evaluation method is shown below. Twenty professional panelists evaluated the stickiness after application to the skin. A (Good): 15 or more panelists evaluated it as excellent B (Slightly poor): 8 or more and 14 or less panelists evaluated it as excellent C (Poor): 7 or less panelists evaluated it as excellent The evaluation items were the feeling of fit, the moist feeling, the firm feeling, the penetration feeling, the non-stickiness, the smoothness and softness of the cream.

[0054]

Table 1

[0055] From the results shown in Table 1 above, it was shown that the values of the average vibration energy at which the cosmetic (base) exhibits a sense of fitness are within the following ranges. (1) In the frequency range of 80 to 90 Hz at 20 to 60 seconds after dropping and spreading the cosmetic, greater than 3.75×10 -6 and less than or equal to 5.31×10 -6 ; and (2) In the frequency range of 10 to 20 Hz at 40 to 60 seconds after dropping and spreading the cosmetic, greater than 6.21×10 -5 and less than or equal to 9.41×10 -5 .

[0056] The following shows other examples of the present invention. In addition, when the same characteristic evaluations as above were performed on the water-in-oil type emulsified cosmetics (Examples) having the compositions shown in Table 2 below, excellent results were obtained in all cases.

[0057]

Table 2

Claims

1. (A)At least one selected from higher alcohols having 14 to 22 carbon atoms in an amount of 0.1 to 5% by mass; (B)A hydrophilic nonionic surfactant in an amount of 0.1 to 1% by mass; (C)An oil component in an amount of 20 to 35% by mass; and (D)An oil-in-water type emulsified cosmetic containing a water-soluble thickener in an amount of 0.7 to 1.2% by mass, wherein the hydrophilic nonionic surfactant in (B) consists of polyoxyethylene (2 to 50) alkyl ether, the oil component in (C) contains (C1) a solid oil component in an amount of 2 to 4% by mass and (C2) a liquid oil component with respect to the total amount of the cosmetic, the liquid oil component in (C2) contains squalane, the blending amount of polyvinyl alcohol in the water-soluble thickener in (D) is 0.3% by mass or less, and the cosmetic is characterized by not containing an anionic surfactant.

2. The cosmetic according to Claim 1, wherein the solid oil component in (C1) is microcrystalline wax.

3. The cosmetic according to Claim 1 or 2, wherein the water-soluble thickener in (D) consists of (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer.

4. The cosmetic according to any one of Claims 1 to 3, wherein the liquid oil component in (C2) contains a nonvolatile hydrocarbon oil and a volatile hydrocarbon oil.

5. The cosmetic according to Claim 4, wherein the volatile hydrocarbon oil contains isododecane.

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