WO2020027076A1 - Oil-in-water emulsion cosmetic - Google Patents

Abstract

The purpose of the present invention is to provide a cosmetic that is capable of imparting springiness and moistness to the skin while retaining smoothness during application, and that also provides excellent use feel such as sensation of fitness to the skin. The present invention pertains to an oil-in-water emulsion cosmetic comprising: at least one alcohol (A) selected from among higher alcohols having 14-22 carbon atoms; a hydrophilic non-ionic surfactant (B); an oil component (C); and 0.5-1.5 mass% of a water-soluble thickening agent (D), the cosmetic being characterized in that the oil component (C) comprises a solid oil component (C1) in an amount of 1-5 mass% with respect to the total amount of the cosmetic and a liquid oil component (C2), and that the cosmetic has a hardness of 5-19 (as measured with φ8 needle at 25°C).

Description

Oil-in-water emulsion cosmetic

The present invention relates to an oil-in-water emulsion cosmetic. More specifically, the present invention relates to an oil-in-water emulsified cosmetic which has an appropriate hardness, has an excellent fit when applied, and can realize a moisture and firmness of the skin, and is particularly suitable for use for the eyes.

皮膚 It is known that skin such as human face loses elasticity and elasticity due to external stimuli such as aging, drying, and ultraviolet rays, and causes slack and wrinkles. To care for these skin problems, moisturizing is effective.External skin preparations such as moisturizing creams containing moisturizers prevent wrinkles and sagging, and maintain a moist, youthful skin condition. Improvements have traditionally been made.

An external preparation for skin that gives a feeling of firmness to the skin contains a coating agent such as polyvinyl alcohol as a typical example. By simultaneously adjusting other components and the amount of the mixture, the stickiness is suppressed and the storage stability is improved. (Patent Document 1).

Patent Document 2 discloses that, in an oil-in-water emulsion composition capable of imparting a firm feeling, the stability over time of a compounded salt type whitening agent is improved (Patent Document 2).

In the face around the eyes (eye area), the skin is thinner than the other parts, the capillaries can be seen through, so the blood flow is stagnant, it tends to become a dark "bear", and the blinking of the skin is also severe, Increases melanin content and accelerates drying. As a result, they tend to lose tension, wrinkle and sag easily, and they tend to stand out.

皮膚 Since the skin around the eyes is sensitive, a skin external preparation containing a conventional film agent sometimes gives a feeling of tightness to the skin and gives discomfort. Patent Literature 3 discloses a cosmetic specialized for the eye area, and blends a copolymer of 2-methacryloyloxyethyl phosphorylcholine with a hydrophobic monomer, acetylated hyaluronic acid and a polyhydric alcohol to provide skin firmness. It is said that it does not cause a sense of tightness while improving the decrease of wrinkles and sagging.

従 来 However, conventional cosmetics (external preparations) as described in Patent Documents 1 to 3 have low viscosity and may lack a feeling of fitting to the skin. In particular, in cosmetics applied to the eyes, it is required to improve the usability such as fit to the skin by imparting appropriate hardness.

JP 2011-148716 A JP 2012-031088 A JP 2005-068073 A

The present invention has been made in view of the above-mentioned problems of the prior art, and gives a firm feeling and a moist feeling (moistness) to the skin while maintaining smoothness at the time of application. An object of the present invention is to provide a cosmetic composition having an excellent feeling.

The inventors have conducted intensive studies to solve the above problems, and as a result, in an oil-in-water emulsified cosmetic containing a higher alcohol and a hydrophilic nonionic surfactant, a predetermined amount of solid oil was blended into the oil. However, by mixing a predetermined amount of a water-soluble thickener in the aqueous phase to have a viscosity of a predetermined value or more, it has the effect of giving the skin elasticity and firmness, and it has a soft and smooth feel when applied. However, the present inventors have found that a cosmetic that is excellent in fit to the skin and gives a moist feeling and does not cause a feeling of tightness can be obtained, thereby completing the present invention.

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

According to the oil-in-water emulsified cosmetic of the present invention, it has the effect of giving the skin elasticity and firmness, while having a soft and smooth feel when applied, it has excellent fit to the skin, and has elasticity and firmness on the skin. It does not give a firm feeling while giving a moist feeling. Further, even when a salt-type whitening agent is blended, it has excellent stability over time and can exhibit an excellent whitening effect.

The oil-in-water emulsified cosmetic of the present invention (hereinafter also simply referred to as "emulsified cosmetic") comprises (A) at least one selected from higher alcohols having 14 to 22 carbon atoms; (C) an oil component; and (D) a water-soluble thickener.
Hereinafter, each component will be described in detail.

The 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 preferable, and among them, it is preferable that at least one selected from cetyl alcohol, stearyl alcohol, and behenyl alcohol is contained.

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. is there.

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

The hydrophilic nonionic surfactant in the present invention is preferably selected from polyoxyethylene alkyl ethers, and particularly has a structure in which a linear saturated alkyl chain and a polyoxyethylene chain are bonded by an ether bond. Are preferred.

The hydrophilic nonionic surfactant (component B) used in the present invention has an average molar number of polyoxyalkylene chains of 2 to 50, preferably 10 to 30, that is, polyoxyethylene (2 To 50) alkyl ethers, preferably polyoxyethylene (10 to 30) alkyl ethers.

As specific examples, for example, polyoxyethylene (10) stearyl ether, polyoxyethylene (11) stearyl ether, polyoxyethylene (20) stearyl ether, polyoxyethylene (30) stearyl ether, polyoxyethylene (20) behenyl Examples thereof include ether and polyoxyethylene (30) behenyl ether, and among them, polyoxyethylene (20) behenyl ether is particularly preferably used.

The amount of hydrophilic polyoxyethylene alkyl ether in the emulsified cosmetic of the present invention is usually 0.01 to 10% by mass, preferably 0.05 to 8% by mass, and more preferably 0.1 to 5% by mass. %.

The (C) oil in the emulsified cosmetic of the present invention contains (C1) a solid oil and (C2) a liquid oil.
(C1) The solid oil component is a solid that does not show fluidity at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 10 ⁴ Pa)), for example, an oil component having a melting point of about 100 ° C. or higher. Can be defined.
Specific examples of the solid oil component include hydrocarbon waxes such as paraffin wax (linear hydrocarbon), microcrystalline wax (branched saturated hydrocarbon), ceresin wax, mokurou, montan wax, Fischer-Tropsch wax, cocoa butter, coconut oil, Solid oils such as horse oil, hardened coconut oil, palm oil, tallow, sheep fat, hardened castor oil, polar waxes such as sucrose acetate stearate, ethylene glycol fatty acid (C18-30) ester, beeswax, lanolin, carnauba wax, can Delila wax, rice bran wax (rice wax), gay wax, jojoba oil, bran wax, kapok wax, bayberry wax, shellac wax, sugarcane wax, isopropyl lanolin fatty acid, hexyl laurate, reduced lanolin, hard lanolin, polyoxyethylene (Hereinafter abbreviated as “POE”) waxes such as lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether, myristic acid, palmitic acid, stearic acid, behenic acid Higher fatty acids such as (Acrylates / Stearyl acrylate / Dimethic methacrylate) copolymer, Acrylates / Behenyl acrylate / Dimethic methacrylate) copolymer, Alkyl methicone, Alkyl dimethicone, Alkyl dimethylsilyl polypropyl silsesquion sun, Stearoxytrimethylsilane, etc. And the like. Of these, hydrocarbon waxes are preferred, and microcrystalline wax is particularly preferred. However, a solid higher alcohol corresponding to the component (A) is not included in the (C1) solid oil component.

The emulsified cosmetic of the present invention is essential to contain (C1) solid oil in (C) oil, thereby maintaining an appropriate hardness of the cosmetic.
(C1) The compounding amount of the solid oil 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.

The (C2) liquid oil component in the present invention is a liquid material having fluidity at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 10 ⁴ Pa)), for example, an oil component having a melting point of 25 ° C. or less. Can be defined as Liquid oils are classified into non-volatile oils and volatile oils based on their properties.

The non-volatile liquid oil in the present specification does not exhibit volatility at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 10 ⁴ Pa)) (for example, the boiling point at normal pressure is about 200 ° C. or higher). (E.g., oil component) corresponds to a liquid oil component, and includes, for example, liquid oils such as hydrocarbon oils and vegetable oils, ester oils, high molecular weight polyoxyalkylene glycols, and silicone oils.

Specific examples of non-volatile liquid oils include linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, kyonin 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, teaseed oil, evening primrose oil, egg yolk oil, liver oil, triglycerin, glyceryl trioctanoate, Liquid oils such as glyceryl triisopalmitate; octanoic esters such as cetyl octanoate; glyceryl tri-2-ethylhexanoate; isooctanoic esters such as pentaerythrit tetra-2-ethylhexanoate; and laurin such as hexyl laurate. Acid ester, isopropyl myristate, octyldodecyl myristate, etc. Myristic acid ester, palmitic acid ester such as octyl palmitate, stearic acid ester such as isocetyl stearate, isostearic acid ester such as isopropyl isostearate, isopalmitic acid ester such as octyl isopalmitate, oleic acid ester such as isodecyl oleate Diester adipate such as diisopropyl adipate, diester sebacate such as diethyl sebacate, ester oil such as diisostearyl malate; hydrocarbon oil such as liquid paraffin and squalane; polyoxybutylenepolyoxypropylene glycol. . Examples of the non-volatile silicone oil include methyl polysiloxane (6 cs), methyl polysiloxane (20 cs), methyl polysiloxane (100 cs), methyl phenyl polysiloxane, amino-modified silicone, and fluorine-modified dimethyl polysiloxane. it can.

The volatile oil blended in the cosmetic of the present invention includes a volatile hydrocarbon oil and a volatile silicone oil.
Volatile hydrocarbon oils are hydrocarbon oils that are volatile at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 10 ⁴ Pa)) (eg, having a boiling point of It is not particularly limited as long as it is a hydrocarbon having a temperature of less than 200 ° C). Specific examples include, for example, isododecane, isohexadecane, hydrogenated polyisobutene, and the like.

Volatile silicone oils are silicone oils that have been used in cosmetics and the like and have volatile properties at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 10 ⁴ Pa)) (for example, having a boiling point of 200 ° C.). And volatile silicone oil (volatile dimethicone) and volatile cyclic silicone oil (volatile cyclodimethicone).

As the volatile dimethicone, dimethylpolysiloxane having a low viscosity (eg, a viscosity at 30 ° C. of about 100 to 500 mPa · s) such as decamethyltetrasiloxane can be used. As a commercially available product, KF-96L-1. 5cs and KF-96L-2cs (all manufactured by Shin-Etsu Chemical Co., Ltd.). Volatile cyclodimethicone includes decamethylcyclopentasiloxane and the like.

で は In the emulsified cosmetic of the present invention, it is preferable to mix at least one kind of non-volatile hydrocarbon oil and at least one kind of volatile hydrocarbon oil. Among them, it is preferable to select squalane as the non-volatile hydrocarbon oil and isododecane as the volatile hydrocarbon oil. By adopting such an embodiment, the feeling of use when applying the cosmetic can be further improved.

In addition, the oil component (C) in the emulsified cosmetic of the present invention is blended with other oil components that are not generally classified as the above-mentioned (C1) solid oil component or (C2) liquid oil component within a range not to impair the effects of the present invention. May be. Examples of other oils include (C3) a semi-solid oil and (C4) an oily ultraviolet absorber.

(C3) The semi-solid oil component exhibits some fluidity at normal temperature (25 ° C.) and normal pressure (1 atm (9.8 × 104 Pa)), but (C2) oil not applicable to the liquid oil component, Is an oil having a boiling point of less than about 100 ° C and a boiling point of 200 ° C or more. Examples include petrolatum, hydrogenated palm oil, palm kernel oil, macadamia nut oil phytosteryl, tetra (behenic acid / benzoic acid / ethylhexanoic acid) pentaerythritol and the like.

(C4) Examples of the oily ultraviolet absorbers include benzoic acid-based ultraviolet absorbers such as paraaminobenzoic acid, paraaminobenzoic acid monoglycerin ester, N, N-dipropoxyparaaminobenzoic acid ethyl ester, and N, N-dimethylparaaminobenzoic acid ethyl ester. Ultraviolet absorbers, anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate, salicylic acid-based ultraviolet absorbers such as amyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate; Octylcinnamate, ethyl-4-isopropylcinnamate, methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, propyl-p-methoxy Namate, isoamyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, 2-ethylhexyl-α-cyano-β- Cinnamic acid ultraviolet absorbers such as phenylcinnamate and glyceryl mono-2-ethylhexanoyl-di-p-methoxycinnamate, 2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, , 2 ', 4,4'-Tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl Benzophenone-2-carbo Benzophenone ultraviolet absorbers such as silates, 3- (4'-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor, urocanic acid, urocanic acid ethyl ester, 2,2'-hydroxy- 5-methylphenylbenzotriazole, 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole, dibenzalazine, dianisylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, 5- (3 , 3-Dimethyl-2-norbornylidene) -3-pentan-2-one and the like.

The blending amount of the oil component (C) in the emulsified cosmetic of the present invention is not particularly limited, but (C1) a solid oil component and (C2) a liquid oil component, and optionally (C3) a semi-solid oil component and (C4) an oil-based ultraviolet absorber. In total, it is preferably 10 to 40% by mass, preferably 15 to 38% by mass, more preferably 20 to 35% by mass, based on the total amount of the cosmetic.

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

The water-soluble thickener (D) in the emulsified cosmetic of the present invention is a water-soluble thickener that can be generally used for cosmetics.
Specific examples include polyvinyl methyl ether, vinyl polymers such as carboxyvinyl polymers, polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, polyethyl acrylate, acrylic polymers such as polyacrylamide, Inorganic water-soluble polymers such as polyethyleneimine, cationic polymer, bentonite, aluminum magnesium silicate, laponite, hectorite, and silicic anhydride, PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer, (dimethyl Acrylamide / acryloyldimethyltaurine Na) crosspolymer, (sodium acrylate / acryloyldimethyltaurine) copolymer, (alkyl acrylate / steareth-20 methacrylate) copolymer Include (ammonium acryloyldimethyltaurate / VP) copolymers and the like. The emulsified cosmetic of the present invention may not contain polyvinyl alcohol, which is considered to give a firm feeling, and when it is contained, the blending amount is 0.3% by mass or less.

In addition to the above, plant-based polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed (quince), alge colloid (brown algae extract); dextran, succinoglucan , Microbial polymers such as pullulan, animal polymers such as collagen, casein, albumin, and gelatin; starch polymers such as starch (rice, corn, potato, wheat), carboxymethyl starch, and methylhydroxypropyl starch; Methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, cellulose sodium sulfate, hydroxypropylcellulose, carboxymethylcellulose Loin sodium, crystalline cellulose, cellulose polymers such as cellulose powder; sodium alginate, alginic acid polymers such like propylene glycol alginate can be exemplified.

In the present invention, it is particularly preferable to use (dimethylacrylamide / sodium acryloyldimethyltaurine) crosspolymer as the water-soluble thickener (D) in view of imparting appropriate hardness.

The compounding amount of the water-soluble thickener (D) 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 to 1.3% by mass. 0.7 to 1.2% by mass. If the amount of the water-soluble thickener (component D) is less than 0.5% by mass, appropriate hardness cannot be achieved, and if the amount exceeds 1.5% by mass, stickiness may occur.

乳化 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, a good fit when applied is obtained.

The present inventors have found that the fit when applying the emulsified cosmetic is correlated with the average vibration energy measured by the following method.

-Measurement method of average vibration energy A three-axis acceleration sensor (for example, model: A3AX, manufactured by Tech Giho Co., Ltd.) is mounted on the side of the subject's index finger where the index finger is located. 20 μL of the cosmetic is dropped and spread on the skin inside the forearm of the other hand. The fingertip of the index finger is moved at a speed of 1 reciprocation / 1 second while applying a force of 0.1 to 0.5 N while contacting the index finger with the surface of the spread cosmetic material (area of 2 cm × 6 cm). Let it. The above operation is continued for 60 seconds immediately after the cosmetic is dropped and spread (0 second), and the vibration during that time is detected by the three-axis acceleration sensor. Next, the vibration data detected by the three-axis acceleration sensor is subjected to a short-time Fourier transform to calculate the vibration energy at each second and each frequency.

When the correlation between the average vibration energy obtained by the above method and the fit of the cosmetic (base) was examined, the cosmetic having an average vibration energy satisfying one or more of the following conditions, preferably two or more: It turned out that the fit was particularly good.
(1) In a frequency range of 80 to 90 Hz from 20 seconds to 60 seconds after the cosmetic is dropped and spread, it is greater than 3.75 × 10 ^{−6 and not} more than 5.31 × 10 ⁻⁶ , preferably 3.80 ×. 10 ⁻⁶ or more and 5.31 × 10 ⁻⁶ or less.
(2) More than 6.21 × 10 ⁻⁵ and 9.14 × 10 ⁻⁵ or less, preferably 6.25 × in a frequency range of 10 to 20 Hz in 40 to 60 seconds after the cosmetic is dropped and spread. 10 ⁻⁵ or more and 9.14 × 10 ⁻⁵ or less.
(3) In a frequency range of 150 to 200 Hz immediately after the cosmetic is dropped and spread (0 seconds) to 30 seconds, the frequency is more than 8 × 10 ⁻⁷ and 2 × 10 ⁻⁶ or less.
(4) In the frequency range of 300 to 500 Hz immediately after the cosmetic is dropped and spread (0 seconds) to 30 seconds, the frequency is more than 3.4 × 10 ^-7 and 1.5 × 10 ^-6 or less.
(5) More than 1.41 × 10 ⁻⁶ and 2.2 × 10 ⁻⁶ or less in a frequency range of 150 to 300 Hz in 30 seconds to 60 seconds after the cosmetic is dropped and spread.

Among the above conditions, it is particularly preferable to use a cosmetic that satisfies both the condition (1) and the condition (2) from the viewpoint of excellent fit.
Accordingly, an emulsion cosmetic is prepared so as to satisfy the requirements of the ingredients, the amount, and the hardness described in claim 1 described below, and the average vibration energy of the prepared emulsion cosmetic is measured according to the method described above, By selecting a cosmetic whose average vibration energy satisfies the above conditions (1) and (2), it is possible to obtain the emulsified cosmetic of the present invention having particularly excellent fit.

In the emulsified cosmetic of the present invention, in addition to the above-mentioned components, components usually used for external preparations for the skin such as cosmetics and quasi-drugs, for example, various agents such as humectants, powder components, and whitening agents are optionally used. Can be appropriately blended.

Examples of humectants include polyhydric alcohols, hyaluronic acid and derivatives thereof, sugar alcohols such as trehalose, cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, diglycerin ethylene oxide and propylene oxide. And adducts.

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. .

Examples of the powder component include talc, kaolin, mica, sericite (sericite), phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, silica, zeolite, barium sulfate, and calcined calcium sulfate (calcium sulfate) , Calcium phosphate, fluorine apatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethacrylic acid Organic powders such as methyl powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, polymethylsilsesquioxane powder, cellulose powder, titanium dioxide, zinc oxide, iron oxide (bengala), iron titanate, yellow oxide Iron, black Inorganic pigments such as iron oxide, carbon black, lower titanium oxide, mango violet, cobalt violet, chromium oxide, ultramarine, navy blue, etc., titanium oxide coated mica, titanium oxide coated bismuth oxychloride, colored titanium oxide coated mica, oxy Bismuth chloride, pearl pigments such as 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, Red No. 3, Organic pigments such as zirconium, barium, and aluminum lakes such as yellow No. 4, green No. 3, and blue No. 1, and natural pigments such as chlorophyll and β-carotene. Examples of the synthetic resin emulsion include an acrylic resin emulsion and a polyvinyl acetate resin emulsion.

Examples of various agents include other whitening agents such as vitamin C and its derivatives, vitamin A and its derivatives, alkoxysalicylic acid and its derivatives, arbutin, and kojic acid.
In addition, sequestering agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, caffeine, tannin, verapamil, tranexamic acid and derivatives thereof, licorice extract, glabridine And hot water extract of the fire thorn fruit, various crude drugs, drugs such as tocopherol acetate, glycyrrhizic acid and derivatives or salts thereof, and the like.

The oil-in-water emulsified cosmetic of the present invention can be provided in the form of a milky lotion, a cream, a serum, a foundation, a makeup base, 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.

(4) The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. Unless otherwise specified, the compounding amount is shown in mass%.

(Test Examples 1-4)
Oil-in-water emulsion cosmetics were prepared according to the formulation shown in Table 1 below. Next, the properties of each of the prepared oil-in-water emulsion cosmetics were evaluated. The evaluation method is as follows.

<Measurement of fit by average vibration energy>
-Measurement method The average vibration energy was measured using the emulsified cosmetic of each example according to the method described in the above paragraph 0041. Then, (1) a frequency range of 80 to 90 Hz in 20 seconds to 60 seconds after the cosmetic is dropped and spread, and (2) 10 to 20 Hz in a range of 40 to 60 seconds after the cosmetic is dropped and spread. The average vibration energy in the frequency range of was calculated. The results are shown in Table 1.

<Sensory test>
The evaluation method is described below.
Twenty specialized panels evaluated the non-stickiness after application to the skin.
A (Good): 15 or more panels evaluated as excellent B (Somewhat poor): 8 or more and 14 or less evaluated as excellent C (Poor): 7 panels evaluated as excellent The evaluation items were as follows: fit, moistness, firmness, penetration, non-stickiness, smoothness and softness of the cream.

From the results shown in Table 1 above, it was shown that the value of the average vibrational energy at which the cosmetic (base) exhibited a fit was within the following range.
(1) greater than 3.75 × 10 ^{−6 and} less than 5.31 × 10 ⁻⁶ in a frequency range of 80 to 90 Hz from 20 seconds to 60 seconds after the cosmetic is dropped and spread; and (2) cosmetics Is larger than 6.21 × 10 ⁻⁵ and 9.41 × 10 ⁻⁵ or less in a frequency range of 10 to 20 Hz in 40 seconds to 60 seconds after being dropped and spread.

Hereinafter, still another embodiment of the present invention will be described.
In addition, when the same property evaluation as described above was performed on the oil-in-water emulsion cosmetics (Examples) having the compositions shown in Table 2 below, excellent results were obtained.

Claims (6)

1. (A) at least one selected from higher alcohols having 14 to 22 carbon atoms;
   (B) a hydrophilic nonionic surfactant;
   An oil-in-water emulsified cosmetic containing (C) an oil component; and (D) 0.5 to 1.5% by mass of a water-soluble thickener,
   (C) The oil component contains (C1) a solid oil component and (C2) a liquid oil component in an amount of 1 to 5% by mass based on the total amount of the cosmetic,
   A cosmetic characterized in that the hardness of the cosmetic (needle 8φ, 25 ° C.) is 5 to 19.
2. The cosmetic according to claim 1, wherein the (B) nonionic surfactant is a polyoxyethylene (2 to 50) alkyl ether.
3. The cosmetic according to claim 1 or 2, wherein the (C1) solid oil component is a microcrystalline wax.
4. The cosmetic according to any one of claims 1 to 3, wherein the (D) water-soluble thickener is a (dimethylacrylamide / acryloyldimethyltaurine sodium) crosspolymer.
5. The cosmetic according to any one of claims 1 to 4, wherein the (C2) liquid oil component includes a nonvolatile hydrocarbon oil and a volatile hydrocarbon oil.
6. The cosmetic according to claim 5, wherein the non-volatile hydrocarbon oil comprises squalane and the volatile hydrocarbon oil comprises isododecane.