TW202019377A - 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 [phi]8 needle at 25 DEG C).

Description

Oil-in-water emulsion cosmetics

The present invention relates to an oil-in-water emulsion cosmetic. More specifically, it relates to an oil-in-water emulsified cosmetic with moderate hardness, excellent fusion feeling when applied, and moisture and firmness of the skin.

It is known that skin such as a person's face loses firmness or elasticity due to aging, dryness, ultraviolet rays and other external irritations, causing sagging or wrinkles. For the care of these skin problems, moisturizing is effective. Previously, skin external preparations such as moisturizing creams equipped with moisturizers were used to prevent wrinkles or sagging and maintain or improve the moisturized youthful skin condition. .

The skin external preparation that gives firmness to the skin is formulated with a coating agent exemplified by polyvinyl alcohol. By adjusting other ingredients or blending amounts to be formulated at the same time, it seeks to suppress stickiness and improve storage stability (patent) Literature 1).

Patent Document 2 discloses the improvement of the time-dependent stability of a salt-type whitening agent in an oil-in-water emulsion composition capable of imparting firmness (Patent Document 2).

In the face, the skin around the eyes (eyes) is thinner than other parts, and the microvessels are transparent and visible. Therefore, if blood flow is stagnant, it will easily become darker "dark circles", and skin caused by blinking The action is also intense, so the increase in melanin amount or drying is promoted. As a result, it is easy to lose firmness and wrinkles or sagging, and there is a clear tendency for them.

Due to the sensitive skin around the eyes, in the skin external preparations previously formulated with a film agent, there may be a feeling of tightness in the skin and discomfort. In Patent Document 3, there is disclosed a cosmetic material dedicated to the eye area, by blending a copolymer of 2-methacryloxyethylphosphocholine and a hydrophobic monomer, acetylated hyaluronic acid, and a polyhydric alcohol, While improving the reduction of skin firmness, wrinkles or sagging, and does not produce tightness.

However, the previous cosmetics (external preparations) described in Patent Documents 1 to 3 described above may have a low viscosity and lack a sense of fusion with the skin. Especially in cosmetics applied around the eyes, it is required to improve the sense of use such as a sense of fusion to the skin by giving a moderate hardness. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-148716 [Patent Document 2] Japanese Patent Laid-Open No. 2012-031088 [Patent Document 3] Japanese Patent Laid-Open No. 2005-068073

[Problems to be solved by the invention]

The present invention has been completed in view of the above-mentioned problems of the prior art, and its object is to provide a cosmetic material that maintains smoothness when applied and imparts firmness and moisturization (moisturization) to the skin and a sense of fusion to the skin, etc. Excellent sense of use. [Technical means to solve the problem]

The inventors have made intensive research in order to solve the above-mentioned problems, and as a result, they found that in water-oil emulsified cosmetics containing higher alcohols and hydrophilic nonionic surfactants, a specific amount of solid oil is blended in the oil, Blending a certain amount of water-soluble tackifier in the water phase to set the viscosity above a certain value, has the effect of giving the skin elasticity or firmness. It can obtain a soft and smooth touch when applied, and it has a good effect on the skin. A cosmetic material having excellent fusion feeling, imparting a moist tactile sensation without producing a tight feeling, and completed the present invention.

That is, the present invention provides an oil-in-water emulsified cosmetic, characterized in that it contains the following components (A) to (D): (A) at least one selected from higher alcohols having 14 to 22 carbon atoms; (B) Hydrophilic non-ionic surfactant; (C) oil content; and (D) 0.5 to 1.5% by mass of water-soluble tackifier; and The (C) oil component includes (C1) solid oil component and (C2) liquid oil component in an amount of 1 to 5% by mass relative to the total amount of cosmetics, The hardness of the cosmetics (needle 8ϕ, 25°C) is 5-19. [Effect of invention]

The oil-in-water emulsified cosmetic according to the present invention has the effect of giving elasticity or firmness to the skin. It is soft and smooth to the touch when applied, and has an excellent sense of fusion to the skin, giving elasticity or firmness to the skin And a moist touch without tightness. In addition, even if a salt-type whitening agent is formulated, its stability over time is excellent, and an excellent whitening effect can be exerted.

The oil-in-water emulsified cosmetics of the present invention (hereinafter, also referred to simply as "emulsified cosmetics") contain: (A) at least one selected from higher alcohols having 14 to 22 carbon atoms; (B) hydrophilic nonionic Surfactants; (C) oil; and (D) water-soluble tackifiers. 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, and oleyl alcohol. One or more of these higher alcohols can be used. In particular, those having a linear saturated alkyl group are preferred, and among them, it is preferred to include one or more kinds selected from cetyl alcohol, stearyl alcohol, and behenyl alcohol.

The amount of 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, and more preferably 0.1 to 5% by mass.

The component (B) in the emulsified cosmetic of the present invention is a hydrophilic nonionic surfactant. The "hydrophilicity" in this specification means that the value of HLB (Hydrophilic-Lipophilic Balance, Hydrophilic/Oil Ratio) determined by the relative strength of 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, particularly preferably a linear saturated alkyl chain and a polyoxyethylene chain bonded by an ether bond Constructor.

Examples of the hydrophilic nonionic surfactant (component B) used in the present invention include those having an average mole number of polyoxyalkylene chains of 2 to 50, preferably 10 to 30, that is, Polyoxyethylene (2-50) alkyl ether, preferably polyoxyethylene (10-30) alkyl ether.

Specific examples include polyoxyethylene (10) stearyl ether, polyoxyethylene (11) stearyl ether, polyoxyethylene (20) stearyl ether, polyoxyethylene (30) stearyl ether, polyoxyethylene Ethylene (20) behen ether, polyoxyethylene (30) behen ether, etc. Among these, polyoxyethylene (20) behen ether is particularly preferably used.

The blending amount of the 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 component in the emulsified cosmetic of the present invention contains (C1) solid oil component and (C2) liquid oil component. (C1) The solid oil component is a solid state that does not show fluidity at normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 ⁴ Pa)). For example, it can be defined as an oil component having a melting point of about 100°C or higher. Specific examples of the solid oil include hydrocarbon waxes such as paraffin (straight chain hydrocarbons), microcrystalline wax (branched chain saturated hydrocarbons), ozokerite, wood wax, montan wax, and Fischer-Tropsch wax; cocoa butter, coconut oil, and horse oil Solid oils such as oil, hydrogenated coconut oil, palm oil, tallow, goat oil, hydrogenated castor oil; polar waxes such as sucrose acetate stearate, glycol fatty acid (C18-30) esters; beeswax, lanolin, carnauba wax , Candelilla wax, rice wax, spermaceti, jojoba oil, bran wax, kapok wax, laurel wax, shellac wax, sugar cane 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 ester, POE hydrogenated lanolin Waxes such as alcohol ethers; higher fatty acids such as myristic acid, palmitic acid, stearic acid, and behenic acid, (acrylate/stearyl acrylate/polydimethylsiloxane methacrylate) copolymer, acrylate /Behenacrylate/Polydimethylsiloxane (methacrylate) copolymer, alkyl polymethylsiloxane, alkyl polydimethylsiloxane, alkyl dimethylsilyl polypropylene Silicone waxes such as semi-siloxane, stearoxy trimethyl silane, etc. Among these, hydrocarbon wax is preferred, and microcrystalline wax is particularly preferred. Among them, the solid higher alcohol that meets the component (A) is not included in the solid oil component (C1).

The emulsified cosmetic of the present invention must contain (C1) solid oil in the (C) oil, thereby maintaining a moderate hardness of the cosmetic. (C1) The blending amount of the solid oil content is 1 to 5% by mass, preferably 1.5 to 4.5% by mass, and more preferably 2 to 4% by mass relative to the total amount of cosmetics.

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

The non-volatile liquid oil in this specification means that it does not show volatility at normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 ⁴ Pa)) (for example, the boiling point at normal pressure is above 200°C) The liquid oil content corresponding to the oil content includes, for example, liquid oils such as hydrocarbon oils and vegetable oils, ester oils, high molecular weight polyoxyalkylene glycols, and polysiloxane oils.

Specific examples of the non-volatile liquid oil include linseed oil, camellia oil, Australian walnut oil, corn oil, olive oil, calyx pear oil, tea plum oil, castor oil, safflower oil, apricot kernel oil, tin 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 butter, liver oil, triglycerin, tricaprylic acid glyceride, triisopalmitic acid glyceride and other liquid fats and oils; caprylic acid cetyl ester and other caprylic acid esters, tri-2-ethylhexanoic acid glyceride, pentaerythritol tetrakis(2-ethyl Hexanoic acid) esters such as isooctanoic acid esters; lauric acid hexyl esters and other lauric acid esters; isopropyl myristate, octyl dodecyl myristate and other myristates; palmitic acid esters such as octyl palmitate; Stearates such as isocetyl stearate; isostearates such as isopropyl stearate; isopalmitates such as octyl isopalmitate; oleates such as isodecyl oleate; adipic acid Adipic acid diesters such as diisopropyl ester; sebacic acid diesters such as diethyl sebacate; ester oils such as diisostearyl malate; hydrocarbon oils such as liquid paraffin and squalane; polyoxybutylene poly Oxypropylene glycol, etc. Examples of non-volatile silicone oils include methyl polysiloxane (6cs), methyl polysiloxane (20cs), methyl polysiloxane (100cs), and methylphenyl polysiloxane. Alkanes, amine modified polysiloxane, fluorine modified dimethyl polysiloxane, etc.

The volatile oil formulated in the cosmetic of the present invention includes volatile hydrocarbon oil and volatile polysiloxane oil. As long as the volatile hydrocarbon oil is a hydrocarbon oil that has been volatile under normal temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 ⁴ Pa)) used in cosmetics etc. (for example, the boiling point has not reached 200°C Hydrocarbons), there is no particular limitation. Specific examples include isododecane, isohexadecane, hydrogenated polyisobutene, and the like.

Volatile silicone oil is a silicone oil that has been used in cosmetics etc. under normal temperature (25℃) and normal pressure (1 atmospheric pressure (9.8×10 ⁴ Pa)) (for example, the boiling point is not reached) 200℃ polysiloxane oil), including volatile linear polysiloxane oil (volatile polydimethylsiloxane) and volatile ring polysiloxane oil (volatile cyclopolysiloxane) alkyl).

As volatile polydimethylsiloxane, dimethylpolysiloxane with low viscosity such as decamethyltetrasiloxane (for example, the viscosity at 30°C is about 100 to 500 mPa·s) can be used as Commercial products include KF-96L-1.5cs, KF-96L-2cs (all manufactured by Shin-Etsu Chemical Industry Co., Ltd.), and the like. Examples of volatile cyclopolysiloxanes include decamethylcyclopentasiloxane and the like.

In the emulsified cosmetic of the present invention, it is preferable to mix at least one non-volatile hydrocarbon oil and at least one volatile hydrocarbon oil for formulation. Among them, squalane which is a non-volatile hydrocarbon oil and isododecane which is a volatile hydrocarbon oil are preferably selected. By setting it as such, it can further improve the feeling of use when applying cosmetics.

In addition, the (C) oil component in the emulsified cosmetic of the present invention can generally be formulated into other oil components not classified as the above-mentioned (C1) solid oil component or (C2) liquid oil component within a range that does not hinder the effect of the present invention. Examples of other oil components include (C3) semi-solid oil components and (C4) oil-based ultraviolet absorbers.

(C3) Semi-solid oil fraction shows some fluidity at room temperature (25°C) and normal pressure (1 atmospheric pressure (9.8×10 ⁴ Pa)), but does not meet (C2) liquid oil fraction (for example, the melting point is less than about 100°C and oil with boiling point above 200°C). For example, petrolatum, hydrogenated palm oil, palm kernel oil, Australian walnut oil plant sterol ester, pentaerythritol tetrakis(behenic acid/benzoic acid/ethylhexanoic acid) ester, etc. may be mentioned.

Examples of (C4) oil-based ultraviolet absorbers include p-aminobenzoic acid, p-aminobenzoic acid monoglyceride, N,N-dipropoxyethyl p-aminobenzoate, N,N-dimethyl Benzoic acid-based ultraviolet absorbers such as ethyl p-aminobenzoate; anthranilic acid-based ultraviolet absorbers such as N-acetyl anthranilic acid-3,3,5-trimethylcyclohexyl ester; water Salicylic acid-based ultraviolet absorbers such as amyl salicylate, homoyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate; octyl cinnamate Ester, ethyl 4-isopropylcinnamate, methyl 2,5-diisopropylcinnamate, ethyl 2,4-diisopropylcinnamate, propyl p-methoxycinnamate, p-methoxy Isoamyl cinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, α-cyano-β- Phenylcinnamic acid 2-ethylhexyl ester, glyceryl mono-2-ethylhexyl dip-methoxycinnamate and other cinnamic acid ultraviolet absorbers; 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, 2-ethylhexyl-4'-phenylbenzophenone-2-carboxylate, etc. Benzophenone ultraviolet absorber; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urinary acid, urinary ethyl ester, 2 , 2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-third octylphenyl)benzotriazole, dibenzylhydrazine, bianisylcarboxamide Methane, 4-methoxy-4'-tert-butyldibenzoylmethane, 5-(3,3-dimethyl-2-arylene)-3-pentane-2-one, etc. .

The amount of (C) oil in the emulsified cosmetics of the present invention is not particularly limited, but (C1) solid oil and (C2) liquid oil, as well as any (C3) semi-solid oil and (C4) oil-based UV absorber The total amount is preferably 10 to 40% by mass, preferably 15 to 38% by mass, and more preferably 20 to 35% by mass relative to the total amount of cosmetics.

Regarding the emulsified cosmetic of the present invention, it can be considered that the above-mentioned (A) higher alcohol, (B) hydrophilic nonionic surfactant, (C2) liquid oil and the water of the external phase form a so-called α-coagulation Glue structure to maintain stable emulsification.

The (D) water-soluble tackifier in the emulsified cosmetics of the present invention is a water-soluble tackifier commonly used in cosmetics. Specific examples include ethylene-based polymers such as polyethylene methyl ether and carboxyvinyl polymers, polyoxyethylene-based polymers, polyoxyethylene-polyoxypropylene copolymer-based polymers, polyethyl acrylate, and polypropylene amide Inorganic water-soluble polymer such as acrylic polymer, polyethylenimine, cationic polymer, bentonite, aluminum magnesium silicate, laponite, lithium bentonite, silicic anhydride, etc., PEG-240/decyl ten Tetral-20/hexamethylene diisocyanate copolymer, (dimethylacrylamide/acryloyldimethyl taurine) crosslinked polymer, (sodium acrylate/acryloyldimethyl) Taurine) copolymer, (alkyl acrylate/stearyl methacrylate-20) copolymer, (acryl dimethyl taurine ammonium/VP) copolymer, etc. The emulsified cosmetic of the present invention may not contain polyvinyl alcohol that gives a firm feeling, and when it is included, the blending amount is 0.3% by mass or less.

In addition to the above, there can be exemplified: gum arabic, tragacanth, polygalactose, locust bean gum, guar gum, karaya gum, carrageenan, sage gum, pectin, agar, quince seed (quince) , Macromolecule macromolecules such as glucan, succinoglycan, polytriglucose, etc.; animal macromolecules such as collagen, casein, albumin, gelatin; starch (starch) Rice, corn, potato, wheat), carboxymethyl starch, methylhydroxypropyl starch and other starch polymers; methyl cellulose, nitrocellulose, ethyl cellulose, methylhydroxypropyl cellulose, Cellulose polymers such as hydroxyethyl cellulose, sodium sulfate cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.; alginic acid such as sodium alginate, propylene glycol alginate Department of polymer and so on.

In the present invention, in terms of imparting moderate hardness, it is particularly preferred to use (dimethylacrylamide/acryloyldimethyl taurine) crosslinked polymer as (D) water-soluble thickener Agent.

The amount of (D) water-soluble tackifier 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, and more preferably 0.7 to 1.2% by mass. If the amount of the water-soluble tackifier (component D) is less than 0.5% by mass, moderate hardness cannot be achieved, and if it exceeds 1.5% by mass, it may cause stickiness.

The emulsified cosmetic of the present invention is characterized in that its hardness (texture analysis device, needle 8ϕ, 25°C) is 5-19, preferably 8-19. By adjusting the hardness as described above, it becomes a person with excellent fusion feeling at the time of application.

The present inventors found that the sense of fusion when applying emulsified cosmetics is related to the average vibration energy measured by the following method.

・Measurement method of average vibration energy A 3-axis acceleration sensor (for example, manufactured by Tecgihan Co., Ltd., model: A3AX) is installed on the side of the nail of the index finger of one hand of the subject. Apply 20 μL of cosmetic material to the skin inside the forearm of the other hand and spread. While bringing the index finger into contact with the surface of the spread cosmetic (the area of 2 cm x 6 cm), apply a force of 0.1 to 0.5 N while moving the tip of the index finger at a rate of 1 round trip/1 second in this state. After the cosmetics are dropped and unfolded (0 seconds) to 60 seconds, the above-mentioned operation is continued, and the vibration in the meantime is detected by the above-mentioned 3-axis acceleration sensor. Then, by performing a short-time Fourier transform on the vibration data detected by the 3-axis acceleration sensor, the vibration energy at each second and each frequency is calculated.

The correlation between the average vibration energy obtained by the above method and the sense of fusion of the cosmetics (base) was found, and it was found that the average vibration energy satisfies any one of the following conditions, preferably two or more cosmetics, the fusion feeling is particularly excellent . (1) In the frequency range of 80 to 90 Hz from 20 seconds to 60 seconds after the cosmetics are dropped and unfolded, it is greater than 3.75×10 ^-6 and 5.31×10 ^-6 or less, preferably 3.80×10 ^-6 or more and 5.31×10 ^-6 or less. (2) In the frequency range of 10 to 20 Hz from 40 seconds to 60 seconds after the cosmetics are dropped and unfolded, it is greater than 6.21×10 ^-5 and 9.14×10 ^-5 or less, preferably 6.25×10 ^-5 or more and 9.14×10 ^-5 or less. (3) In the frequency range of 150 to 200 Hz after the cosmetics are dropped and unfolded (0 seconds) to 30 seconds, it is greater than 8×10 ^-7 and less than 2×10 ^-6 . (4) In the frequency range of 300 to 500 Hz after the cosmetics are dropped and unfolded (0 seconds) to 30 seconds, it is greater than 3.4×10 ^-7 and 1.5×10 ^-6 or less. (5) In the frequency range of 150 to 300 Hz from 30 seconds to 60 seconds after the cosmetics are dropped and unfolded, it is greater than 1.41×10 ^-6 and 2.2×10 ^-6 or less.

Among the above conditions, from the viewpoint of excellent fusion feeling, it is particularly preferred that the cosmetics satisfy both condition (1) and condition (2). Therefore, to prepare the emulsified cosmetics in such a manner as to satisfy the requirements of the blending ingredients, blending amount, and hardness described in the following claim 1, for the prepared emulsified cosmetics, the average vibration energy is measured according to the above method, and the average vibration energy is selected to satisfy the above The cosmetics under the conditions of (1) and (2) can obtain the emulsified cosmetics of the present invention which are particularly excellent in fusion feeling.

In the emulsified cosmetic of the present invention, in addition to the above-mentioned components, components commonly used in external skin preparations such as cosmetics and quasi-drugs, such as various agents such as moisturizers, powder components, whitening agents, etc., can be appropriately formulated as necessary.

Examples of moisturizers include polyols, hyaluronic acid and its derivatives, sugar alcohols such as trehalose, cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, and diglycerin ring. Oxyethane-propylene oxide adduct, etc.

Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, Polyethylene glycol, etc.

Examples of the powder component include talc, kaolin, mica, sericite, phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, silica, zeolite, barium sulfate, and calcined calcium sulfate (fired Gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), boron nitride and other inorganic powders; polyamide resin powder (Nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, polymethyl silsesquioxane powder, cellulose powder and other organic powder; titanium dioxide , Zinc oxide, iron oxide (iron dan), iron titanate, iron oxide yellow, iron oxide black, carbon black, low-cost titanium oxide, mango violet, cobalt violet, chromium oxide, ultramarine, iron blue and other inorganic pigments; titanium oxide Coated mica, titanium oxide coated bismuth oxychloride, colored titanium oxide coated mica, bismuth oxychloride, fish scale foil and other pearl pigments; aluminum powder and other metal powder pigments; red 201, red 202, orange 203, Organic pigments such as yellow 205, yellow 401, blue 404; red 3, yellow 4, green 3, blue 1 and other organic pigments such as zirconium, barium, aluminum lake; chlorophyll, β-carotene And other natural pigments. Examples of synthetic resin emulsions include acrylic resin emulsions and polyvinyl acetate resin emulsions.

Examples of various agents include vitamin C and its derivatives, vitamin A and its derivatives, alkoxysalicylic acid and its derivatives, arbutin, kojic acid, and other whitening agents. In addition, metal blocking agents such as disodium ethylenediaminetetraacetic acid, trisodium ethylenediaminetetraacetic acid, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, caffeine, tannin, vitamin Lapami, tranexamic acid and its derivatives, licorice extract, glycyrrhizin, hot water extract of the fruit of pyracantha, various natural medicines, vitamin E acetate, glycyrrhizic acid and its derivatives or their salts, etc. Pharmacy, etc.

The oil-in-water emulsified cosmetics of the present invention can be provided in the form of lotions, creams, beauty liquids, compacts, pre-makeup milk, etc., and are not particularly limited. Since the emulsified cosmetic of the present invention has a moderate hardness, it is particularly suitable for eye cosmetics such as eye cream. [Example]

With regard to the present invention, the following examples are further described in detail, but the present invention is not limited thereto. Unless otherwise stated, the blending amount is expressed in mass %.

(Test examples 1 to 4) The oil-in-water emulsion cosmetics were prepared according to the formula shown in Table 1 below. Then, the characteristics of the prepared oil-in-water emulsion cosmetics were evaluated. The evaluation method is as follows.

<Measurement of fusion sense using average vibration energy> ·test methods Using the emulsified cosmetics of each example, the average vibration energy was measured according to the method described in paragraph 0041 above. Then, calculate the frequency range of (1) 80 to 90 Hz from 20 seconds to 60 seconds after dropping the cosmetics and spreading, and (2) within the frequency range from 10 to 20 Hz after dropping the cosmetics and spreading from 40 to 60 seconds The average vibration energy. The results are shown in Table 1.

<Functional test> The evaluation method is shown below. Twenty professional functional inspectors evaluated the non-stickiness after applying to the skin. A (good): 15 or more functional inspectors evaluated as excellent B (slightly poor): 8 or more and 14 or less functional inspectors evaluated as excellent C (bad): 7 or less functional inspectors evaluated as excellent The evaluation items were set as fusion feeling, moist feeling, firmness, penetration, non-stickiness, smoothness and softness of the cream.

[Table 1]

According to the results shown in Table 1 above, the average vibration energy value of the cosmetics (base) showing a sense of fusion is within the following range. (1) In the frequency range of 80 to 90 Hz from 20 seconds to 60 seconds after the cosmetics are dropped and unfolded, greater than 3.75×10 ^-6 and below 5.31×10 ^-6 ; and (2) After the cosmetics are dropped and unfolded Within the frequency range of 10 to 20 Hz in the next 40 seconds to 60 seconds, it is greater than 6.21×10 ^-5 and less than 9.14×10 ^-5 .

In the following, further embodiments of the present invention are shown. In addition, the oil-in-water emulsion cosmetics (Examples) having the composition shown in Table 2 below were also evaluated for the same characteristics as described above, and all obtained excellent results.

[Table 2]

Claims (6)

An oil-in-water emulsified cosmetic, characterized in that it contains the following components (A) to (D): (A) at least one selected from higher alcohols having 14 to 22 carbon atoms; (B) Hydrophilic non-ionic surfactant; (C) oil content; and (D) 0.5 to 1.5% by mass of water-soluble tackifier; and The (C) oil component includes (C1) solid oil component and (C2) liquid oil component in an amount of 1 to 5% by mass relative to the total amount of cosmetics, The hardness of the cosmetics (needle 8ϕ, 25°C) is 5-19. The cosmetic according to claim 1, wherein the (B) nonionic surfactant is a polyoxyethylene (2-50) alkyl ether. The cosmetic as claimed in claim 1 or 2, wherein the solid oil (C1) is divided into microcrystalline wax. The cosmetic according to any one of claims 1 to 3, wherein the water-soluble tackifier (D) is a (dimethylacrylamide/acryloyldimethyl taurine) cross-linked polymer. The cosmetic according to any one of claims 1 to 4, wherein the (C2) liquid oil component includes non-volatile hydrocarbon oil and volatile hydrocarbon oil. The cosmetic according to claim 5, wherein the non-volatile hydrocarbon oil contains squalane and the volatile hydrocarbon oil contains isododecane.