CN114040747B - Oil-in-water type emulsified cosmetic - Google Patents

Abstract

The purpose of the present invention is to provide a cosmetic which is an oil-in-water emulsion cosmetic, can stably retain a powder component having a soft focus effect, and has an effect which is not available in conventional correction cosmetics, such as imparting a tightening sensation. The present invention provides an oil-in-water emulsion cosmetic characterized by comprising: (A) 1 to 10 mass% of a higher alcohol, (B) 2 to 20 mass% of a nonionic surfactant, (C) a silicone elastomer powder, (D) a coloring material, (E) water, and (F) an oil component, wherein the (D) coloring material contains (D1) a coloring pigment containing 0.5 mass% or more of an oxide of iron.

Description

Oil-in-water emulsion cosmetics

Technical Field

The present invention relates to an oil-in-water emulsion cosmetic and, more specifically, to an oil-in-water emulsion cosmetic that has an excellent effect of concealing skin flaws and can softly adhere to the skin and impart a firming feeling.

Background Art

The "beauty effect" that is one of the important functions required of makeup cosmetics such as foundation includes skin color adjustment and correction of unevenness of pores, etc. Conventional foundations are blended with components having a high refractive index for correcting skin color and powder components that make unevenness of the skin less noticeable by light diffusion effects (Patent Document 1).

In order to mix the powder component having the above-mentioned soft focus effect into the product and continuously exert the effect, the powder component needs to be uniformly dispersed in the cosmetic. In particular, oil-in-water emulsion cosmetics have the advantage of giving a moist touch when applied to the skin, but it is difficult to stably retain the powder component having a hydrophobic surface.

Patent Document 2 describes a water-based cosmetic obtained by blending a hydrophobic powder into an aqueous phase into which an α-gel structure is introduced, and Patent Document 3 describes an oil-in-water emulsified cosmetic in which an α-gel structure is introduced into the aqueous phase, a specific sugar ester is blended into the oil phase, and a liquid higher fatty acid having a powder dispersing effect is blended, thereby improving the stability of the hydrophobic powder in the inner oil phase. The cosmetics described in these documents exert a correction effect based on the blended powder components, but if the amount of the powder components is increased, it is difficult to maintain stability, and the hydrophobic powder dispersed in the inner oil phase seeps into the outer aqueous phase, which may cause color stripes. In addition, these cosmetics cannot give a firming feeling to the skin.

Cosmetics that give a firming feeling to the skin have long been blended with water-soluble polymers such as polyvinyl alcohol that have film-forming properties (Patent Document 4). The film formed by these water-soluble polymers has the effect of smoothing fine wrinkles and giving a firming feeling to the skin. However, there is a problem that the film becomes hard over time or produces a tight feeling.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Publication No. 2011-201829

Patent Document 2: WO2017/150519

Patent Document 3: Japanese Patent No. 5913411

Patent Document 4: Japanese Patent Application Publication No. 2011-148716

Summary of the invention

Problem that the invention aims to solve

The object of the present invention is to provide a cosmetic which is an oil-in-water emulsified cosmetic which stably retains a powder component having a soft-focus effect to provide excellent feeling of use and skin correction effect, and which also has effects not found in conventional corrective cosmetics, such as making fine wrinkles and sagging less noticeable and imparting a firming feeling.

Solutions for solving problems

The present inventors conducted intensive research to solve the above-mentioned problems and found that the above-mentioned problems can be solved by adjusting the compounding amount of the components constituting the α-gel to a specific range and adding a silicone elastomer powder to an oil-in-water emulsified cosmetic in which an α-gel structure is introduced into the aqueous phase, thereby completing the present invention.

That is, the present invention provides an oil-in-water emulsified cosmetic, characterized in that it contains:

(A) 1 to 10% by mass of a higher alcohol,

(B) 2 to 20% by mass of a nonionic surfactant,

(C) Silicone elastomer powder,

(D) Coloring materials,

(E) Water, and

(F) Oil content,

The (D) coloring material includes a (d1) coloring pigment containing 0.5 mass % or more of an iron oxide.

Effects of the Invention

The oil-in-water emulsified cosmetic of the present invention contains a large amount of α gel constituent components compared to the prior art. These components, together with water, form lamellar aggregates (α gel) in which water is retained between the hydrophilic parts of the lamellar crystals, thereby thickening the entire cosmetic system and forming a gel having softness and moderate hardness. Therefore, the emulsification stability is significantly improved, and the mixed powder components can be maintained in a state in which they are uniformly dispersed. On the other hand, by including silicone elastomer powder with a soft focus effect as a powder component, even if the amount of α gel constituent components is increased, stickiness will not occur, and not only can the correction effect be maintained for a long time, but also a soft fit can be given when used, and fine wrinkles and sagging can be made less noticeable, giving a firm feeling to the skin.

DETAILED DESCRIPTION

(A) Higher alcohols

The (A) higher alcohol to be blended in the oil-in-water emulsified cosmetic of the present invention (hereinafter also referred to as "the cosmetic of the present invention") is not particularly limited as long as it can be used in the fields of cosmetics, drugs, quasi-drugs, etc., and examples thereof include saturated straight-chain monohydric alcohols and unsaturated monohydric alcohols.

Examples of saturated straight-chain monohydric alcohols include lauryl alcohol, tridecanol, tetradecanol (myristyl alcohol), pentadecanol, hexadecanol (cetyl alcohol), heptadecanol, octadecanol (stearyl alcohol), nonadecanol, eicosanol (arachidyl alcohol), heneicosanol, behenyl alcohol, tricosanol, tetracosanol (carnauba alcohol), pentacosanol, hexacosanol (wax alcohol), etc. Examples of unsaturated monohydric alcohols include elaidic alcohol, etc. In the present invention, saturated straight-chain monohydric alcohols are preferred from the perspective of stability over time.

(A) The higher alcohol may be one or more of the above. In the present invention, a mixture of two or more aliphatic alcohols is preferably used, and a combination in which the melting point of the mixture is 60°C or more is more preferred. When the melting point is lower than 60°C, the temperature stability of the system may be reduced depending on the formulation. In the present invention, it is preferred to use a higher alcohol having a straight-chain saturated alkyl group having 12 to 22 carbon atoms, for example, a combination of stearyl alcohol and behenyl alcohol is particularly preferred.

The amount of the higher alcohol (A) is 1 to 10% by mass, preferably 2 to 8% by mass, relative to the total amount of the oil-in-water emulsified cosmetic. If the amount of the higher alcohol (A) is less than 1% by mass, a firming feeling may not be imparted to the skin, and if it exceeds 10% by mass, sufficient emulsion stability may not be obtained.

(B) Nonionic surfactant

The (B) nonionic surfactant used in the oil-in-water emulsified cosmetic of the present invention is not particularly limited. As specific examples, polyethylene glycol fatty acid esters, polyoxyethylene fatty acid glycerides, polyoxyethylene/methyl polysiloxane copolymers, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, maltitol hydroxy aliphatic alkyl ethers, alkylated polysaccharides, alkyl glycosides, sucrose fatty acid esters, polyoxyethylene hardened castor oil glycerides, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene/polyoxypropylene block copolymers, tetrapolyoxyethylene/tetrapolyoxypropylene-ethylenediamine condensates, polyoxyethylene-beeswax/lanolin derivatives, alkanolamides, polyoxyethylene-propylene glycol fatty acid esters, polyoxyethylene-alkylamines, polyoxyethylene-fatty acid amides, alkyl ethoxydimethylamine oxides, trioleyl phosphates, etc. These nonionic surfactants can be mixed with one or more of them.

In the present invention, among the (B) nonionic surfactants, it is preferred to use hydrophilic surfactants, for example, surfactants having an HLB of 8 or more, or an HLB of 10 or more. It should be noted that in this specification, the HLB of two or more surfactants is a value obtained by weighted average based on the blending amount of each surfactant.

The (B) nonionic surfactant in the present invention preferably comprises: (b1) a surfactant (first surfactant) that mainly contributes to the formation of an α-gel, and (b2) a surfactant (second surfactant) that mainly contributes to the emulsification of the entire cosmetic system. The aforementioned (b1) first nonionic surfactant and (b2) second nonionic surfactant may be composed of the same substance or different substances, but both are preferably hydrophilic.

As the (b1) first surfactant, it is preferable to use an ether of a linear saturated alkyl group (preferably having 12 to 22 carbon atoms) and a polyalkylene glycol (polyethylene oxide, polypropylene oxide, polybutylene oxide, etc.). Specific examples include glyceryl monostearyl ether (baty alcohol), POE (20) cetyl ether, POE (30) cetyl ether, POE (20) stearyl ether, POE (25) stearyl ether, POE (30) stearyl ether, POE (20) behenyl ether, POE (30) behenyl ether, POE (20) glyceryl monoisostearate, POE (60) glyceryl monoisostearate, POE (20) sorbitan monostearate, sorbitan cocoate, PEG-7 glyceryl cocoate, lauramide MEA, lauryl pyridinium chloride, PEG-32 laurate, PEG-40 hydrogenated castor oil laurate, PEG-14 oleate, polyglyceryl-6 oleate, PEG-32 dilaurate, and PEG-11 cocamide, but are not limited to these. Particularly, POE (20) cetyl ether, POE (30) cetyl ether, POE (20) stearyl ether, POE (30) stearyl ether, POE (20) behenyl ether, POE (30) behenyl ether, and the like can be mentioned.

As the second surfactant (b2), a surfactant having a relatively bulky molecular structure is preferred. Specifically, for example, it is preferred to use at least one nonionic surfactant selected from the group consisting of polyoxyethylene hardened castor oils such as polyoxyethylene hardened castor oil (10 E.O.), polyoxyethylene hardened castor oil (20 E.O.), polyoxyethylene hardened castor oil (30 E.O.), polyoxyethylene hardened castor oil (40 E.O.), polyoxyethylene hardened castor oil (50 E.O.), polyoxyethylene hardened castor oil (60 E.O.), polyoxyethylene hardened castor oil (100 E.O.), polyoxyethylene stearic acid glyceryl, polyoxyethylene isostearic acid glyceryl, polyoxyethylene triisostearate, and polyoxyethylene hardened castor oil succinate.

Regarding the amount of the nonionic surfactant (B) in the cosmetic of the present invention, the total amount of the first surfactant (b1) and the second surfactant (b2) is 2 to 20% by mass relative to the total amount of the oil-in-water emulsified cosmetic. The amount of each of the first surfactant (b1) and the second surfactant (b2) is preferably in the range of 1 to 10% by mass relative to the total amount of the oil-in-water emulsified cosmetic.

(b1) When the amount of the first nonionic surfactant is less than 1% by mass, sufficient α gel cannot be formed to give a firm feeling to the skin, and when it exceeds 10% by mass, it may cause stickiness. (b2) When the amount of the second nonionic surfactant is less than 1% by mass, the emulsification stability of the cosmetic as a whole becomes insufficient, and when it exceeds 10% by mass, the formation of α gel may be hindered.

(C) Silicone elastomer powder

The (C) silicone elastomer powder used in the cosmetic of the present invention is not particularly limited, but preferably a spherical silicone elastomer powder. Among them, a white spherical silicone composite powder formed by covering a spherical silicone rubber powder with a silicone resin is preferably used. The average particle size of the spherical silicone elastomer powder is preferably in the range of 0.1 to 100 μm, more preferably 1 to 50 μm. In addition, the JIS-A hardness of the spherical silicone elastomer powder is preferably in the range of 10 to 80.

As the (C) silicone elastomer powder in the present invention, for example, one or more selected from the group consisting of (vinyl dimethicone/methicone silsesquioxane) crosspolymer, (diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer, polysilicone-1 crosspolymer, polysilicone-22, (dimethicone/vinyl dimethicone/methicone) crosspolymer, and (dimethicone/vinyl dimethicone) crosspolymer, which are listed in the cosmetic ingredient display names, can be suitably used.

(c) As the silicone elastomer powder, commercially available products can be used, for example, (vinyl dimethicone/methicone silsesquioxane) crosslinked polymers [product names: KSP-100, KSP-101, KSP-102, KSP-105 (manufactured by Shin-Etsu Chemical Co., Ltd.)], polysilicone-1 crosslinked polymers [product name: KSP-411 (manufactured by Shin-Etsu Chemical Co., Ltd.), polysilicone-22 [product name: KSP-441 (manufactured by Shin-Etsu Chemical Co., Ltd.)], (dimethicone/vinyl dimethicone) crosslinked polymers [product names: TREFIL E-506S, TREFIL E-508 (manufactured by Dow Chemical Company)], etc. can be mentioned. Among them, KSP series silicone elastomer powder manufactured by Shin-Etsu Chemical Co., Ltd., namely, (vinyl dimethicone/methicone silsesquioxane) crosspolymer, polysilicone-1 crosspolymer, and/or polysilicone-22 are preferably used.

The amount of the silicone elastomer powder (C) in the cosmetic of the present invention is preferably 1 to 10% by mass, more preferably 2 to 8% by mass. When the amount of the silicone elastomer powder (C) is less than 1% by mass relative to the total amount of the cosmetic, the unevenness correction effect cannot be fully exerted and stickiness may occur. When the amount exceeds 10% by mass, the fit during application may be reduced.

In addition, in the cosmetics of the present invention, it is preferred that the amount of the aforementioned (C) silicone elastomer powder in the total amount of the usable powders in the cosmetics is set to 60% by mass or more. Here, "usable powders" refer to organic or inorganic powders, especially spherical powders and plate-like powders, mixed to improve the usability of the cosmetics, excluding ultraviolet scattering agents such as particulate titanium oxide and pigments (coloring pigments, white pigments, extender pigments, pearlescent pigments). Examples of usable powders include silicone resin powders, resin powders such as PMMA, silica powders, mica, barium sulfate powders, and the like.

The silicone elastomer powder as the component (C) may be blended in either the oil phase or the water phase, but is preferably blended in the water phase.

(D) Coloring materials

The coloring material (D) in the present invention includes: (d1) coloring pigments, (d2) white pigments, (d3) extender pigments, (d4) pearlescent pigments, (d5) organic synthetic pigments (including dyes, lakes, organic pigments) and (d6) natural pigments. It should be noted that in this specification, the coloring pigments (d1), white pigments (d2) and extender pigments (d3) are sometimes referred to as "inorganic pigments".

In the cosmetic of the present invention, the aforementioned (D) coloring material contains (d1) coloring pigment as an essential component, and the (d1) coloring pigment contains 0.5% by mass or more of iron oxide relative to the total amount of the cosmetic. The iron oxide contained in the (d1) coloring pigment is preferably one or more selected from red iron oxide (red iron oxide), yellow iron oxide, and black iron oxide, and the (d1) coloring pigment may contain a coloring inorganic pigment represented by ultramarine blue in addition to the iron oxide.

The amount of iron oxide contained in the coloring pigment (d1) in the cosmetic of the present invention is at least 0.5% by mass. If it is less than 0.5% by mass, a sufficient cosmetic effect cannot be obtained. The upper limit of the amount of iron oxide is not particularly limited, but is usually 5% by mass or less, preferably 2% by mass or less.

The coloring material (D) in the present invention may contain, in addition to the coloring pigment (d1), other coloring materials selected from the group consisting of (d2) white pigments, (d3) extender pigments, (d4) pearlescent pigments, (d5) organic synthetic pigments (including dyes, lakes, organic pigments), and (d6) natural pigments. In particular, when the cosmetic of the present invention is provided in the form of a foundation, it is preferred to blend (d2) white pigments.

(d2) White pigments are inorganic pigments represented by titanium oxide and zinc oxide. In the present invention, titanium oxide is preferably used.

From the viewpoint of improving the shielding property, the average particle size of titanium oxide is 0.1 μm or more, for example, 0.1 μm to 1 μm, preferably 0.1 μm to 0.8 μm. However, it is not limited to these, and titanium oxide having an average particle size other than the above range may be used as long as the skin correction effect, dispersibility and emulsification stability are not impaired. The average particle size in the present disclosure is an average value calculated from the value measured by observation based on a transmission electron microscope (TEM) or the like.

The inorganic pigments including (d1) coloring pigments, (d2) white pigments, or (d3) extender pigments in the cosmetics of the present invention are inorganic pigments having a hydrophobic surface, and are preferably blended in the oil phase (internal phase).

The surface hydrophobization treatment method of inorganic pigment is not particularly limited, and known methods can be used. Specifically, silicone treatment (based on silicone oils such as methyl hydrogen polysiloxane, dimethyl polysiloxane, methylphenyl polysiloxane; alkyl silanes such as methyl trimethoxy silane, ethyl trimethoxy silane, hexyl trimethoxy silane, octyl trimethoxy silane, octyl triethoxy silane; fluoroalkyl silanes such as trifluoromethyl ethyl trimethoxy silane and heptadecafluoro decyl trimethoxy silane, etc.), fatty acid treatment (based on palmitic acid, isostearic acid, stearic acid, lauric acid, myristic acid, behenic acid, oleic acid, abietic acid, 12-hydroxystearic acid, etc.), fatty acid soap treatment (aluminum stearate, calcium stearate, 12-hydroxystearic acid, etc.), fatty acid ester treatment (based on dextrin fatty acid ester, cholesterol fatty acid ester, sucrose fatty acid ester, starch fatty acid ester, etc.) etc.

The amount of the hydrophobized titanium oxide in the cosmetic of the present invention is 1 to 20% by mass, preferably 2 to 10% by mass, and most preferably 3 to 7% by mass relative to the total amount of the oil-in-water emulsified cosmetic. For example, in the case of cosmetics that require skin color correction effects such as foundations and concealers, if the amount of the hydrophobized titanium oxide is less than 1% by mass, sufficient skin correction effects cannot be obtained, and if it exceeds 20% by mass, the emulsion stability may be impaired.

(E) Water

The (E) water used in the cosmetic of the present invention is not particularly limited, and specific examples thereof include purified water and ion-exchanged water.

(E) The amount of water added is preferably 25 to 90% by mass, more preferably 30 to 80% by mass, and most preferably 30 to 60% by mass, based on the total amount of the oil-in-water emulsified cosmetic.

(F) Oil

The (F) oil component used in the cosmetic of the present invention constitutes the oil phase of the internal phase of the oil-in-water emulsified cosmetic. The oil component that can be used in the present invention is not particularly limited, and can be selected from the users of the cosmetic within the range that does not impair the stability. Preferred oil components include hydrocarbon oils, ester oils, silicone oils, liquid fats, and the like.

As the hydrocarbon oil, liquid paraffin, squalane, squalene, paraffin, isoparaffin, ceresin, isohexadecane, isododecane and the like are used.

As the ester oil, pentaerythritol tetra(ethylhexanoate), cetyl ethylhexanoate, jojoba oil, di(phytosteryl/octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, glyceryl tri(ethylhexanoate), dimer dilinoleic acid (phytosteryl/behenyl) esters, dimer dilinoleic acid (phytosteryl/isostearyl/cetyl/stearyl/isostearyl/cetyl/stearyl/behenyl) esters, isopropyl palmitate, macadamia fatty acid phytosteryl esters, pentaerythritol tetra(behenic acid/benzoic acid/ethylhexanoic acid) ester, ethylhexyl palmitate, myristyl myristate, isopropyl myristate, tripropylene glycol dineopentanoate, diisopropyl sebacate, isodecyl neopentanoate, and the like can be used.

Examples of the silicone oil include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane, silicone resins having a three-dimensional network structure, and silicone rubber.

As liquid oils, there are linseed oil, camellia oil, macadamia oil, corn oil, mink oil, olive oil, avocado oil, camellia oil, castor oil, safflower oil, rapeseed oil, soybean oil, peanut oil, triglycerol, glyceryl tricaprylate, glyceryl triisopalmitate, etc.

The (F) oil component in the present invention further contains a UV absorber (particularly, a UV absorber that is liquid at room temperature). Examples of the UV absorber include octyl methoxycinnamate, octocrylene, polysilicone-15, bis(resorcinol-based) triazine, ethylhexyl triazone, diethylaminohydroxybenzoyl hexyl benzoate, and oxybenzone-3.

The amount of the (F) oil component to be blended is not particularly limited, but is preferably 5 to 30% by mass based on the total amount of the oil-in-water emulsified cosmetic.

The cosmetics of the present invention are formulated with the aforementioned essential ingredients (A) to (F) as described above, so that the total amount of the cosmetic is appropriately thickened due to the large amount of α gel constituent components ((A) and (b1)) compared to conventional corrective cosmetics. As a result, the cosmetics not only adhere softly to the skin and give a firming feeling, but also the (C) silicone elastomer powder is uniformly dispersed in the water phase and stably maintained. On the other hand, the (D) coloring material such as (d1) coloring pigments and (d2) white pigments is stably maintained in the oil phase without causing color streaks.

The cosmetic of the present invention preferably has a viscosity of 8000 to 40000 mPa·s (B-type viscometer, 30° C., 12 rpm), and more preferably has a viscosity of 10000 to 25000 mPa·s (B-type viscometer, 30° C., 12 rpm).

The cosmetic of the present invention may contain, in addition to the essential components (A) to (F) described above, any other optional components that are generally contained in cosmetics, particularly color cosmetics, within a range that does not impair the effects of the present invention.

For example, when a liquid higher fatty acid such as isostearic acid, which is considered to be an essential component, is added to the cosmetics described in Patent Document 3, the dispersibility of the powder component is improved, so it is preferred. However, when a large amount of liquid higher fatty acids are added, the formation of α gel is sometimes hindered, so the amount of the liquid higher fatty acid added in the present invention is preferably less than 1% by mass, more preferably 0.9% by mass or less, and further preferably 0.8% by mass or less. The present invention also includes a mode in which no liquid higher fatty acid is added.

The cosmetics of the present invention are preferably blended with a moisturizer. The moisturizer is not particularly limited and can be selected from those commonly blended in cosmetics, etc. For example, polyethylene glycol, propylene glycol, glycerol, 1,3-butylene glycol (1,3-BG), xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucin sulfate, caronic acid, atelocollagen, cholesterol-12-hydroxystearate, sodium lactate, bile acid salt, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerol (EO) PO adduct, roxburghii extract, yarrow extract, Melilotus extract, trehalose, pentaerythritol, POE·POP random copolymer methyl ether, etc. can be listed.

Examples of other optional components include thickeners, lower (C1 to C6) alcohols, natural polymers, synthetic polymers, antioxidants, buffers, various drugs, preservatives, and fragrances, but are not limited to these.

It should be noted that as a water-soluble thickener, polysaccharide derivatives such as hydroxyethyl cellulose, succinoglycan, gellan gum, agar, and copolymers containing 2-acrylamide-2-methylpropane sulfonic acid can be used. However, when gellan gum, agar, and copolymers containing 2-acrylamide-2-methylpropane sulfonic acid are mixed, if their mixing amount is 1/9 or more of the total mixing amount of the α gel constituent components ((A) higher alcohol + (B) nonionic surfactant), the cosmetic becomes too hard, so it is not preferred. Therefore, when gellan gum, agar, and/or copolymers containing 2-acrylamide-2-methylpropane sulfonic acid are mixed, their mixing amount is less than 1/9 of the mixing amount of the α gel constituent components, preferably less than 1/10.

The cosmetics of the present invention can be produced according to the production method commonly used in oil-in-water emulsified cosmetics. For example, it can be produced by mixing the water phase component and the oil phase component, respectively, adding the oil phase component mixture to the water phase component mixture and stirring appropriately to emulsify it, thereby producing (production method I).

Alternatively, the following method can be used: prepare a "first emulsion (1)" comprising (D) a coloring material, a portion of (E) water containing (b2) a second surfactant, and a portion of (F) an oil component (as the "first oil component"), separately prepare a "second emulsion" comprising (A) a higher alcohol, (b1) a first surfactant, the remainder of (E) water, and the remainder of (F) an oil component (as the "second oil component"), and mix the first emulsion with the second emulsion to thereby produce (Preparation Method II).

Furthermore, the following method can be used: prepare a "first emulsion (2)" comprising (D) a coloring material, (E) water containing (b2) a second surfactant, and (F) a portion of the oil component (as the "first oil component"), add a mixture of (A) a higher alcohol, (b1) a first surfactant, and (F) the remainder of the oil component (as the "second oil component") to the first emulsion and further emulsify, thereby producing (Preparation Method III).

Here, the "first oil component" in Production Method II and Production Method III preferably contains a non-polar oil selected from hydrocarbon oils and silicone oils, and the "second oil component" preferably contains a polar oil selected from ester oils and ultraviolet absorbers.

The (C) silicone elastomer powder is preferably blended into the aqueous phase component in Preparation I, the aqueous phase of the "first emulsion (1)" or "second emulsion" in Preparation II, or the aqueous phase of the "first emulsion (2)" in Preparation III.

The cosmetic of the present invention is suitably provided as a skin cosmetic excellent in imparting skin correction effect and firming feeling, particularly as a makeup cosmetic such as foundation.

The cosmetic of the present invention is suitably provided in the form of a liquid or cream-type foundation, for example, preferably in the form of a tube container, a dispenser container, a wide-mouth bottle container, etc., or in the form of a cushion foundation impregnated in a water-insoluble sponge, a foam carrier, etc.

Example

The present invention will be described in more detail below with reference to Examples, but the present invention is not limited thereto. It should be noted that, unless otherwise specified, the blending amount represents mass % relative to the total amount.

Oil-in-water emulsified cosmetics having the formulations shown in Tables 1 and 2 were prepared and evaluated as follows.

Each cosmetic of the Examples and Comparative Examples was applied to the skin, and sensory evaluation was conducted on "no stickiness", "tightening", "fine wrinkle concealing effect", "ease of application", and "makeup effect after 4 hours" according to the following criteria. "Makeup effect after 4 hours" is an indicator indicating that the makeup effect is good with no powder or fat floating after 4 hours.

A: I feel it very strongly.

B: I feel it.

C: Rarely.

D: Not at all.

The "stability" was evaluated by visually observing the cosmetic of each example according to the following criteria.

A: Extremely stable and no changes were observed.

B: Stable and essentially no change was observed.

C: Unstable and produces color bands.

[Table 1]

[Table 2]

As shown in Tables 1 and 2, the cosmetics of the present invention (Examples 1 to 5) obtained satisfactory results in all evaluation items. However, Comparative Example 1, in which the amount of α gel components ((A) and (b1)) added was small, had poor stability and failed to provide a firming feeling. On the other hand, Comparative Example 2, in which the (C) silicone elastomer powder was not added, had stickiness and poor fine wrinkle concealing effect. In addition, Comparative Examples 1 and 2 were also insufficient in terms of makeup effect.

The following are other formulation examples of the cosmetics of the present invention. The cosmetics of this formulation also have the same properties as those of the above-mentioned Example 1.

(Formulation Example 1)

Claims (6)

1. An oil-in-water emulsion cosmetic comprising:

(A) 2 to 8 mass% of higher alcohol,

(B) 2 to 20 mass% of nonionic surfactant,

(C) 1 to 10 mass% of a silicone elastomer powder,

(D) A coloring material,

(E) 30 to 80 mass% of water, and

(F) 5 to 30 mass% of an oil component,

the higher alcohol (A) is one or more selected from dodecanol (laurinol), tridecanol, tetradecanol (myristyl alcohol), pentadecanol, hexadecanol (cetyl alcohol), heptadecanol, octadecanol (stearyl alcohol), nonadecanol, eicosanol (arachidyl alcohol), heneicosanol, docosyl alcohol (behenyl alcohol), tricosyl alcohol, tetracosyl alcohol (carnauba alcohol), pentacosyl alcohol, hexacosyl alcohol (ceryl alcohol),

the nonionic surfactant (B) contains:

(b1) 1 to 10 mass% of a 1 st surfactant comprising an ether of a linear saturated alkyl group having 12 to 22 carbon atoms and a polyalkylene glycol

(b2) 1 to 10 mass% of a 2 nd surfactant comprising polyoxyethylene hardened castor oil,

(C) The silicone elastomer powder is 1 or more than 2 selected from the group consisting of (vinyl polydimethylsiloxane/polymethylsilsesquioxane) crosslinked polymer, (diphenyl polydimethylsiloxane/vinyl diphenyl polydimethylsiloxane/silsesquioxane) crosslinked polymer and polysiloxane-22,

the coloring material (D) comprises (D1) a coloring pigment and (D2) a white pigment, wherein the coloring pigment contains 0.5 mass% or more of an oxide of hydrophobicized iron relative to the total amount of the cosmetic, the white pigment contains hydrophobicized titanium oxide, and the mixing amount of the hydrophobicized titanium oxide is 2-10 mass% relative to the total amount of the cosmetic.

2. The cosmetic according to claim 1, wherein (d 1) the coloring pigment is at least 1 selected from the group consisting of iron oxide red, iron oxide yellow and iron oxide black.

3. The cosmetic according to claim 1, wherein the compounding amount of the liquid higher fatty acid is less than 1% by mass relative to the total amount of the cosmetic.

4. The cosmetic according to claim 1, wherein the (F) oil is at least 1 selected from the group consisting of hydrocarbon oil, ester oil, silicone oil, and ultraviolet absorber which is liquid at normal temperature.

5. The cosmetic according to claim 1, further comprising a humectant and a water soluble thickener.

6. The cosmetic according to claim 1, wherein the oil component (F) is a liquid oil or fat.