CN115363969A

CN115363969A - Oil-in-water type cosmetic

Info

Publication number: CN115363969A
Application number: CN202210553279.0A
Authority: CN
Inventors: 田中静磨; 松下裕史
Original assignee: Shiseido Co Ltd
Current assignee: Shiseido Co Ltd
Priority date: 2021-05-20
Filing date: 2022-05-19
Publication date: 2022-11-22
Also published as: JP2022178561A

Abstract

The present invention provides an oil-in-water type cosmetic, and provides a cosmetic containing an oil capsule which has excellent flavor and excellent stability. An oil-in-water type cosmetic comprising: (A) An oil capsule having an average particle diameter of 100 [ mu ] m or more, which contains (A1) a solid oil component and (A2) a liquid oil component; and (B) a perfume complex comprising (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume.

Description

Oil-in-water type cosmetic

Technical Field

The present invention relates to an oil-in-water type cosmetic. More specifically, the present invention relates to an oil-in-water type cosmetic composition containing oil capsules having a size that can be visually observed.

Background

There is known an oil-in-water type emulsion cosmetic in which large oily particles having an average particle diameter of 50 μm to 10mm are dispersed in an aqueous phase. Since the cosmetic containing such large oily particles has oily particles of a size that can be visually recognized dispersed therein, the cosmetic has a feeling of use that has not been found before, such as a moist and refreshing feeling when applied to the skin, and a moist feeling after a while. Further, if the decomposable oil-soluble component is retained in the large oil-soluble particles, there is an effect that the decomposition of the oil-soluble component can be suppressed.

For example, patent document 1 discloses a capsule-containing cosmetic in which oil capsules having an average particle size of 100 μm or more, which contain an oil component that is solid at room temperature, are dispersed in an aqueous medium.

Conventionally, microcapsules encapsulating a perfume have been widely used in cleaning agents and deodorants, and are expected to have an effect of slowly releasing a pleasant fragrance. In cosmetics, users have been demanding fragrances, and techniques for encapsulating fragrances in microcapsules have been developed.

The cosmetic containing the above-mentioned macro oil capsules is required to have a good flavor.

Documents of the prior art

Patent literature

Patent document 1: japanese patent laid-open publication No. 2006-104131

Disclosure of Invention

In the case of the above-mentioned cosmetic containing oily capsules, when a perfume is encapsulated in the capsules for the purpose of achieving a good flavor, it has been found that it is difficult to achieve a good flavor. Further, it has been found that it is also difficult to achieve a good flavor by merely blending a perfume outside the capsule without encapsulating it in the capsule.

In such a background, the present inventors have unexpectedly found that: by forming a perfume complex containing a specific surfactant and a perfume separately from an oil-based capsule and blending the complex outside the capsule, a cosmetic having excellent fragrance and excellent stability can be provided. The present invention has been completed based on these findings.

Accordingly, the present invention discloses a cosmetic comprising an oil-based capsule and a perfume complex.

The present invention provides the following inventions.

[1] An oil-in-water type cosmetic comprising:

(A) An oil capsule having an average particle diameter of 100 μm or more and containing (A1) a solid oil component and (A2) a liquid oil component, and

(B) A perfume complex comprising (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume.

[2] The cosmetic according to item [1], wherein the amount of the surfactant (B1) is 0.01 to 0.45% by mass based on the total amount of the cosmetic.

[3] The cosmetic according to item [1] or [2], wherein the amount of the fragrance (B2) to be blended is 0.001 to 0.5% by mass based on the total amount of the cosmetic.

[4] The cosmetic according to any one of [1] to [3], wherein the mass ratio of (B1) the surfactant to (B2) the fragrance is 1:0.02 to 1:0.4.

[5] the cosmetic according to any one of [1] to [4], which comprises (B1) a solubilizing micelle in which (B2) a fragrance is encapsulated by a surfactant.

[6] The cosmetic according to any one of [1] to [5], wherein the average particle size of the fragrance complex is 500nm or less.

[7] The cosmetic according to any one of [1] to [6], wherein the surfactant (B1) is a nonionic surfactant.

[8] The cosmetic according to any one of [1] to [7], wherein the surfactant (B1) is selected from the group consisting of polyether-modified silicones, POE-sorbitan fatty acid esters, POE-sorbitol fatty acid esters, POE-glycerin fatty acid esters, POE-alkyl ethers, pluronic, POE-POP-alkyl ethers, tetrapOE-tetrapOP-ethylenediamine condensates, POE-castor oil hydrogenated castor oil derivatives, POE-beeswax-lanolin derivatives, POE-propylene glycol fatty acid esters, alkylene oxide/ethylene oxide-dipolyglycol ethers, POE-alkylamines, and POE-fatty acid amides.

[9] [1] A method for producing an oil-in-water type cosmetic according to any one of [1] to [8], comprising the steps of:

a step in which (A1) a solid oil component and (A2) a liquid oil component that have been adjusted to a temperature exceeding the melting point and are in a liquid state are introduced into an aqueous solvent adjusted to a temperature exceeding the melting point while stirring at 10-1500 rpm, to form a mixture, and the mixture is cooled to room temperature while stirring, to form (A) an oil capsule having an average particle diameter of 100 [ mu ] m or more;

dissolving (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume in a lower alcohol or a polyhydric alcohol, introducing the solution into an aqueous solvent, and stirring the solution to form (B) a perfume complex; and

mixing the oil capsules (A) and the flavor complex (B).

The present invention can provide a cosmetic containing an oil-based capsule which has excellent fragrance and excellent stability.

Detailed Description

[ cosmetics ]

The present invention relates to an oil-in-water type cosmetic comprising: (A) An oil capsule having an average particle diameter of 100 [ mu ] m or more, which contains (A1) a solid oil component and (A2) a liquid oil component; and (B) a perfume complex comprising (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume.

(A) Oil capsule

The oil-in-water type cosmetic of the present invention (hereinafter sometimes referred to as a cosmetic) comprises: an oil capsule (hereinafter, sometimes referred to as an oil capsule or component (A)) having an average particle diameter of 100 μm or more, which contains (A1) a solid oil component and (A2) a liquid oil component.

The oil capsule of the present invention is considered to have: the capsule structure in which the (A1) component (outer layer) is covered around the inner layer containing the (A2) component. Further, the solid oil forming the outer layer is crystallized to have an appropriate hardness and give a unique feeling of use.

The average particle size of the oil capsules is 100 μm or more, preferably 100 μm to 1.5mm, and more preferably 100 μm to 1mm. The particle size of the oil capsules can be measured using a microscope.

The amount of the oil capsule (a) is preferably 0.5 to 10% by mass, more preferably 1 to 5% by mass, based on the total amount of the cosmetic.

(A1) Solid oil component

(A) The oil capsule contains (A1) a solid oil component. In the present invention, the term "solid oil" refers to an oil that is solid or semisolid at normal temperature (25 ℃).

Examples of the solid oil component (A1) include paraffin wax, microcrystalline wax, ceresin, beeswax, paraffin wax, polyethylene wax, silicone wax, higher alcohols (e.g., behenyl alcohol, stearyl alcohol, and cetyl alcohol), batyl alcohol, carnauba wax, beeswax, candelilla wax, jojoba oil, lanolin, shellac wax, the wax 39912wax, wood wax, higher fatty acids (e.g., myristic acid, palmitic acid, stearic acid, behenic acid, and 12-hydroxystearic acid), ester oils (e.g., myristyl myristate), cocoa butter, hydrogenated castor oil, hydrogenated palm oil, hydrogenated coconut oil, polyethylene, vaseline, various hydrogenated animal and vegetable oils, and lanolin alcohol esters of fatty acids monocarboxylic acids.

From the viewpoint of stability at high temperatures, the melting point of the solid oil (A1) is preferably 50 ℃ or higher, more preferably 55 ℃ or higher, and still more preferably 65 ℃ or higher. In addition, from the viewpoint of particle formability and dispersibility, the melting point is preferably 85 ℃ or lower. More preferable examples of the solid oil component (A1) include hydrogenated jojoba oil (melting point: 68 ℃ C.), glycerol behenate/eicosanedioic acid ester (melting point: 66 ℃ C.), higher alcohols having 16 or more carbon atoms, preferably 18 or more carbon atoms, such as stearyl alcohol (melting point: 52 to 62 ℃ C.), and behenyl alcohol (melting point: 68 ℃ C.), microcrystalline wax (melting point: 80 ℃ C.), ceresin wax (melting point: 68 to 75 ℃ C.), polyethylene wax (melting point: 80 ℃ C.), batyl alcohol (melting point: 70 ℃ C.), carnauba wax (melting point: 83 ℃ C.), candelilla wax (melting point: 71 ℃ C.), hydrogenated castor oil (melting point: 84 ℃ C.), stearic acid (melting point: 58 to 63 ℃ C.), and behenic acid (melting point: 69 to 80 ℃ C.), and 12-hydroxystearic acid (melting point: 70 ℃ C.).

(A1) The ingredient (A) may be compounded in 1 or 2 or more. The amount of the component (A1) in the composition of the present invention is preferably 5 to 50% by mass, and preferably 10 to 20% by mass, based on the total amount of the component (a). By setting the content in this range, the stability of the oil capsule can be improved, and the oil capsule can be provided with an appropriate hardness to improve the usability such as skin-friendly property.

(A2) Liquid oil component

(A) The oil capsule contains (A2) a liquid oil component. In the present invention, the "liquid oil component" refers to an oil component that is liquid at normal temperature (25 ℃).

Examples of the liquid oil component (A2) include:

linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, camellia oil, castor oil, safflower oil, almond oil, cinnamon oil, jojoba oil, grape seed oil, almond oil, rapeseed oil, sesame oil, sunflower oil, wheat germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, triglycerol, glyceryl trioctanoate, glyceryl trioctalate, coconut oil, palmolein, palmityl oil and palm kernel oil and other fatty cetyl octanoates, glyceryl tri (2-ethylhexanoate), pentaerythritol tetra (ethylhexanoate) and other isooctanoates, lauric acid esters such as hexyl laurate, isopropyl myristate, octyl myristate and other myristic acid esters, palmitic acid esters such as octyl palmitate, stearic acid esters such as isocetyl stearate, isopropyl isostearate and other isostearic acid esters, isopalmitic acid esters such as octyl isopalmitic acid esters, oleic acid esters such as isodecyl oleate, adipic acid diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacate, distearic acid esters such as diisostearic acid esters,

Hydrocarbon oils such as liquid paraffin, ozokerite (Ozokerite), ceresin, squalene, pristane, paraffin, isoparaffin, vaseline, etc,

Chain silicones such as polydimethylsiloxane (Dimethicone), polymethylphenylsiloxane (Phenyl Methicone), and polymethylhydrogensiloxane, cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, amino-modified silicone oils, polyether-modified silicone oils, carboxyl-modified silicone oils, alkyl-modified silicone oils, ammonium-modified silicone oils, and silicone oils containing modified silicones such as fluorine-modified silicone oils.

Of these, polar oil components such as glycerol tris (2-ethylhexanoate) and pentaerythritol tetrakis (ethylhexanoate) are preferable because they can impart good skin-friendly and moisturizing properties due to the presence of the oil-based capsules. Further, silicone oil is preferable because it can impart good skin-friendly properties, moist feeling, and smooth feeling due to the presence of the oil-based capsule.

(A2) The ingredient (A) may be compounded in 1 or 2 or more. The amount of the component (A2) to be blended in the composition of the present invention is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, based on the total amount of the component (a). By setting the content in this range, the stability of the oil capsule can be improved, and the oil capsule can be provided with an appropriate hardness to improve the usability such as skin-friendly property.

(A) The oil capsule may contain other components in addition to the essential components (A1) and (A2) within a range not impairing the effects of the present invention. Examples of other ingredients that can be blended in the oil capsule include oil-soluble thickeners, humectants, oil-soluble drugs (e.g., oil-soluble vitamins, oil-soluble plant extracts, etc.), ultraviolet absorbers, chelating agents, pH adjusters, preservatives, pigments, dyes, surfactants, powder ingredients, and the like.

(B) Fragrance composite

The cosmetic of the present invention comprises: a perfume complex comprising (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume. Preferably, the surfactant (B1) is formed as a solubilizing micelle encapsulating the perfume (B2).

(B1) The mass ratio of the surfactant to the (B2) perfume is preferably 1:0.02 to 1:0.4, more preferably 1:0.05 to 1:0.2.

the average particle diameter of the perfume complex is preferably 500nm or less, and more preferably 1 to 200nm. The average particle size of the flavor complex is measured optically by a dynamic light scattering method or the like, assuming that the complex has a spherical shape.

(B1) Surfactant having HLB of 8.5 or more

(B) The oil capsule contains (B1) a surfactant having an HLB of 8.5 or more.

The Hydrophilic Lipophilic Balance (HLB) value is preferably 8.5 to 19. In the present invention, the HLB value is preferably calculated by the Davis method.

(B1) The ingredient is preferably a nonionic surfactant.

(B1) The surfactant is preferably selected from the group consisting of polyether-modified silicones (e.g., PEG/PPG-30/10 polydimethylsiloxane), POE-sorbitan fatty acid esters (e.g., POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitol tetraoleate, etc.), POE-sorbitol fatty acid esters (e.g., POE-sorbitol monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, POE-sorbitol monostearate, etc.), POE-glycerol fatty acid esters (e.g., POE-glycerol monooleate such as POE-glycerol monostearate, POE-glycerol monoisostearate, POE-glycerol triisostearate, etc.), POE-fatty acid esters (e.g., POE-distearate, POE-dioleate, ethylene glycol distearate, etc.), POE-alkyl ethers (e.g., POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ester ether, POE-cholesteryl ether, etc.), pluronic, POE-POP-alkyl ethers (e.g., POE-POP-cetyl ester ether, POE-POP-2-decyltetradecyl ether, POE-POP-monobutyl ether, POE-POP-hydrogenated lanolin, POE-POP-glyceryl ether, etc.), tetrapoe-tetrapop-ethylenediamine condensates (e.g., tetronic, etc.), POE-castor oil hydrogenated castor oil derivatives (e.g., POE-castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate, POE-hydrogenated castor oil monopyroglutamic acid monoisostearate, POE-hydrogenated castor oil maleic acid, etc.), POE-beeswax, lanolin derivatives (e.g., POE-sorbitol beeswax, etc.), POE-propylene glycol fatty acid ester, alkylene oxide/ethylene oxide-diethylene glycol ether (e.g., PEG/polybutylene glycol-44/15 methyl ether hydrogenated dimer dilinoleate), POE-alkylamine, and POE-fatty acid amide. (B1) More preferably, the component (b) is selected from the group consisting of polyether-modified silicones, POE-glycerin fatty acid esters, POE-POP-alkyl ethers, POE-castor oil hydrogenated castor oil derivatives, and alkylene oxide/ethylene oxide-dipolyglycol ethers.

(B1) The components may be compounded 1 or 2 or more. The amount of the component (B1) is preferably 0.01 to 0.45% by mass, more preferably 0.05 to 0.4% by mass, based on the total amount of the cosmetic. By setting the content in this range, stable oily capsules can be formed and stickiness after application can be suppressed.

(B2) Perfume

(B) The oil capsule contains (B2) a perfume. (B2) The perfume is not particularly limited, and may be a natural perfume or a synthetic perfume.

The natural perfume is a perfume mainly containing a component derived from a plant or an animal, and examples thereof include natural perfumes derived from a plant, such as rose oil, jasmine oil, neroli oil, lavender oil, ylang-ylang oil, tuberose oil, sage oil, clove oil, peppermint oil, geranium oil, patchouli oil, sandalwood oil, cinnamon oil, coriander oil, nutmeg oil, pepper oil, lemon oil, orange oil, bergamot oil, ledebouriella root oil, vetiver oil, orris oil, oak moss oil and the like, musk oil, raccoon castor oil, castoreum oil, ambergris oil and the like.

Synthetic perfumes are classified into hydrocarbons, alcohols, aldehydes, ketones, esters, lactones, phenols, acetals, and the like from the viewpoint of their chemical structures, perfuming groups, and the like. Specific examples thereof include limonene, β -caryophyllene (hydrocarbons, as described above), cis-3-hexenol, linalool, farnesol, β -phenylethyl alcohol, geraniol, citronellol, terpineol, menthol, santalol primary alcohol (Brahmanol, as described above), 2, 6-nonadienal, citral, α -hexylcinnamaldehyde, l-carvone, cyclopentadecanone, lyral, lilial (as described above), β -ionone, damascenone, methylionone, irilone, ambroxone, acetylcedrene, musk ketone (as described above), linalyl acetate, benzyl benzoate, benzyl acetate, methyl dihydroxy jasmonate, methyl jasmonate (as described above), γ -undecalactone, jasmonate, cyclopentadecanolide, ethylene glycol brassylate (as described above), eugenol (phenols), phenylacetaldehyde, rose oxide, neroli, and the like.

(B2) The ingredient (A) may be compounded in 1 or 2 or more. The amount of the component (B2) is preferably 0.001 to 0.5% by mass, more preferably 0.001 to 0.2% by mass, based on the total amount of the cosmetic.

The cosmetic of the present invention may contain ingredients generally used in cosmetics as other ingredients besides the ingredients (a) and (B) within a range not impairing the effects of the present invention. Examples of such components include water-soluble thickeners, oil-soluble thickeners, humectants, water-soluble drugs (e.g., arbutin, ascorbyl glucoside, tranexamic acid, 4-methoxysalicylate, etc.), ultraviolet absorbers, chelating agents, pH adjusters, preservatives, pigments, dyes, surfactants, powder components, and the like.

Among the above components, a water-soluble thickener is preferably blended in order to further improve the stability of the dispersion. Examples of the water-soluble thickener include vegetable polymers such as gum arabic, tragacanth gum, galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar, quince seed (Quince), and algin (brown algae extract), microbial polymers such as dextran, succinoglucan, pullulan, and xanthan gum, animal polymers such as collagen, casein, albumin, and gelatin, cellulose polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder, alginic acid polymers such as sodium alginate and propylene glycol alginate, vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymers, and alkyl-modified carboxyvinyl polymers, polyoxyethylene polyoxypropylene copolymer polymers, sodium polyacrylate, polyethylacrylate, and silicic acid amide, acrylic polymers such as polyvinylamine, cationic polymers, bentonite, lithium hectorite, and inorganic silicate polymers such as magnesium anhydride.

Among these water-soluble thickeners, an alkyl-modified carboxyvinyl polymer can be selected as a particularly preferable water-soluble thickener because it has a surface activity and also has an action of preventing aggregation of macro particles. The alkyl-modified carboxyvinyl polymer is also referred to as an alkyl acrylate methacrylate copolymer, preferably an (acrylate/alkyl acrylate (C10-30)) crosslinked polymer. (acrylic acid ester/alkyl acrylate (C10-C30)) crosslinked polymers commercially available as "CARBOPOL 1342", "Pemulen TR-1 polymer emulsifier", "Pemulen TR-2 polymer emulsifier" (manufactured by Lubrizol Advanced Materials, inc.).

The cosmetic of the present invention is suitable for use as a cosmetic base having a unique appearance and feeling in use. Examples of cosmetics using such a base include aqueous cosmetics, gel-like cosmetics, and emulsion cosmetics. The extract can be used as face, body or hair cosmetics such as cosmetic water, jelly, lotion, cream, and facial mask.

[ method for producing cosmetics ]

The method for producing a cosmetic product of the present invention comprises the steps of:

a step (hereinafter, sometimes referred to as an oil capsule forming step) of introducing (A1) a solid oil component and (A2) a liquid oil component, which have been adjusted to a temperature exceeding the melting point and are liquid, into an aqueous solvent adjusted to a temperature exceeding the melting point with stirring at 10 to 1500rpm to prepare a mixture, and cooling the mixture to room temperature with stirring to form (a) oil capsules having an average particle diameter of 100 μm or more;

a step of dissolving (B1) a surfactant having an HLB of 8.5 or more and (B2) a perfume in a lower alcohol or a polyhydric alcohol, introducing the solution into an aqueous solvent, and stirring the solution to form (B) a perfume complex (hereinafter, sometimes referred to as a perfume complex forming step); and

a step of mixing (a) the oil capsules and (B) the flavor complex (hereinafter, sometimes referred to as a mixing step).

The respective steps will be described in detail below.

Oil capsule forming step

The components (A1) and (A2) are adjusted to a temperature exceeding the melting point, and are in a liquid state. They were introduced into an aqueous solvent adjusted to have substantially the same temperature as the aqueous solvent under stirring. The stirring may be carried out at a relatively low speed, specifically, 10 to 1500rpm (preferably 20 to 300 rpm), using a propeller or paddle stirrer. The introduction into the aqueous solvent can be performed by using an injection means such as a liquid feeding pump, for example, and is preferably performed by directly injecting from below the aqueous solvent. When this injection is performed from the top, the oily components are immediately separated by suspension, and it may be difficult to form particles having a uniform particle size.

By introducing the above components into the aqueous solvent under stirring, liquid particles can be formed in the aqueous solvent.

Next, the mixture of the aqueous solvent and the above components is further cooled to room temperature with stirring, whereby a solid oil having a melting point temperature or lower is deposited on the particle surface. Thus, the oil capsules having an average particle size of 100 μm or more are formed in the aqueous solvent.

Perfume Complex Forming Process

Dissolving the component (B1) and the component (B2) in a lower alcohol or a polyhydric alcohol. This solution was introduced into an aqueous solvent and stirred. The stirring conditions are not particularly limited, but the mixture is usually stirred and mixed until the mixture is visually transparent. In this case, the stirring is preferably carried out at a stirring speed of 100 to 300 rpm. Thereby forming (B) a perfume complex.

The order of the oil capsule forming step and the flavor complex forming step is not particularly limited.

Mixing procedure

Mixing (A) the oily capsules and (B) the flavor complex. The oil capsules and the perfume complex are generally uniformly dispersed or dissolved in a medium, but mixing in a state of being contained in an aqueous solvent is also a preferable embodiment. The order of mixing them is not particularly limited. The temperature at the time of mixing is usually a temperature lower than the melting point of the solid oil component (A1), for example, room temperature, at which the oil capsules and the flavor complex are not decomposed. Further, the stirring conditions during mixing are also not particularly limited, but mixing is preferably performed at a level at which the oil capsules are not destroyed.

Examples

The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. The amount of the compound is expressed as mass% relative to the total amount unless otherwise specified.

[ example 1]

The cosmetic of example 1 was prepared according to the formulation shown in table 1.

Specifically, the aqueous solvent was heated to 70 ℃ and stirred at 250rpm using a propeller mixer, and the components (A1) and (A2) melted at 70 ℃ were injected into the aqueous solvent phase from the lower part of the same phase at a speed of 20 m/min using a liquid feed pump. After the injection was completed, the stirring speed was reduced to 150rpm, and after cooling to room temperature, potassium hydroxide was added to form a composition containing an oily capsule.

Then, the components (B1) and (B2) were dissolved in ethanol, introduced into an aqueous solvent, and stirred at 200rpm to form a composition containing a perfume complex.

Thereafter, the composition containing the oil capsules and the composition containing the perfume complex were mixed to obtain the cosmetic of example 1.

Examples 2 to 7 and comparative example 2

The cosmetics of examples 2 to 7 and comparative example 2 were prepared in the same manner as in example 1 according to the formulation shown in table 1.

Comparative example 1

The cosmetic of comparative example 1 was prepared in the same manner as in example 1, except that the oil capsule was formed by adding the component (B2) to the components (A1) and (A2) according to the formulation shown in table 1. In comparative example 1, the fragrance was present in the oil capsules.

Comparative example 3

Comparative example 3 was prepared in the same manner as in example 1, except that (B2) was added to the components (A1) and (A2) to form an oil capsule according to the formulation shown in table 1, and then only the component (B1) was introduced into an aqueous solvent. In comparative example 3, the fragrance was present in the oil-based capsules, and (B1) the surfactant was present outside the capsules, and no fragrance complex was formed.

[ Table 1]

[ particle diameter of oil capsules ]

Mixing the above prepared cosmetic 3g

Is spread out on the culture dish, and an image is taken from above with a digital camera together with a scaleThe scale reads the particle size of 50 particles represented and calculates the average. The average grain diameter of the obtained oily capsules is 100 mu m-1.0 mm.

[ particle size of fragrance Complex ]

The cosmetic prepared above was diluted to 1/10 with ion-exchanged water to prepare a sample. These samples were observed using "Zetasizer NANO-ZS" (manufactured by Sysmex Corporation) to measure the particle diameter. The average particle size of the obtained perfume complex is 50nm or less.

[ evaluation of flavor ]

The cosmetics of the examples and comparative examples were applied to the skin in a predetermined amount, and the intensity of the fragrance immediately after application was evaluated according to the following criteria. The results obtained are shown in table 1.

A: high strength

B: weak (weak)

[ evaluation of stability ]

The cosmetics of examples and comparative examples were stored at 25 ℃ and 40 ℃ for 1 month, and then the state of the oil capsules was observed. The evaluation criteria are as follows. The results obtained are shown in Table 1.

A: no change in the state of the oil capsules was observed under any storage conditions.

B: less than 20% aggregation/deformation of oil capsules was observed only upon storage at 40 ℃

C: more than 20% aggregation/deformation of oil capsules was observed only when stored at 40 deg.C

According to the results of table 1, it was found that: a cosmetic composition containing an oil-based capsule and a perfume complex containing a specific surfactant and a perfume has good fragrance and excellent stability.

Claims

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

2. The cosmetic according to claim 1, wherein the amount of the surfactant (B1) compounded is 0.01 to 0.45 mass% with respect to the total amount of the cosmetic.

3. The cosmetic according to claim 1 or 2, wherein the amount of the (B2) fragrance compounded is 0.001 to 0.5% by mass relative to the total amount of the cosmetic.

4. The cosmetic according to any one of claims 1 to 3, wherein the mass ratio of the (B1) surfactant to the (B2) fragrance is 1:0.02 to 1:0.4.

5. the cosmetic according to any one of claims 1 to 4, which is formed with a solubilizing micelle in which the (B1) surfactant encapsulates the (B2) perfume.

6. The cosmetic according to any one of claims 1 to 5, wherein the average particle diameter of the perfume complex is 500nm or less.

7. The cosmetic according to any one of claims 1 to 6, wherein the (B1) surfactant is a nonionic surfactant.

8. The cosmetic according to any one of claims 1 to 7, wherein the surfactant (B1) is selected from the group consisting of polyether-modified silicones, POE-sorbitan fatty acid esters, POE-sorbitol fatty acid esters, POE-glycerin fatty acid esters, POE-alkyl ethers, pluronic, POE-POP-alkyl ethers, tetrapOE-tetrapOP-ethylenediamine condensates, POE-castor oil hydrogenated castor oil derivatives, POE-beeswax-lanolin derivatives, POE-propylene glycol fatty acid esters, alkylene oxide/ethylene oxide-dimer glycol ethers, POE-alkylamines, and POE-fatty acid amides.

9. The method for producing the oil-in-water type cosmetic according to any one of claims 1 to 8, which comprises the steps of:

mixing the oil capsules (A) and the perfume complex (B).