WO2022264841A1

WO2022264841A1 - Oil-in-water emulsion cosmetic

Info

Publication number: WO2022264841A1
Application number: PCT/JP2022/022667
Authority: WO
Inventors: 礼奈松井; 香代子直井; 春佳西
Original assignee: 株式会社資生堂
Priority date: 2021-06-17
Filing date: 2022-06-03
Publication date: 2022-12-22
Also published as: JPWO2022264841A1; CN117500474A

Abstract

Provided is an oil-in-water emulsion cosmetic which contains pigment-grade hydrophobized particles and a salt- or acid-form skin whitening agent and/or a salt- or acid-form anti-inflammatory agent and is excellent in terms of emulsion stability and tone-up property.　This oil-in-water emulsion cosmetic comprises a dispersion medium including water and oil droplets dispersed in the dispersion medium, wherein the dispersion medium contains at least one agent selected from the group consisting of skin whitening agents and anti-inflammatory agents and further contains pigment-grade hydrophobized particles, the skin whitening agents including at least one agent selected from the group consisting of salt-form skin whitening agents and acid-form skin whitening agents and the anti-inflammatory agents including at least one agent selected from the group consisting of salt-form anti-inflammatory agents and acid-form anti-inflammatory agents.

Description

Oil-in-water emulsified cosmetic

The present disclosure relates to oil-in-water emulsified cosmetics.

In the field of cosmetics, oil-in-water emulsified cosmetics containing powders such as pigments and salt-type drugs have been developed.

Patent Document 1 discloses that i) at least one polymer containing a sulfonic acid group, ii) a polysaccharide modified with a hydrophobic chain, and iii) at least one ( Disclosed is an oil-in-water emulsion type composition comprising one silicone surfactant selected from meth)acrylic acid polymers and/or oxyethylenated polydimethylsiloxanes, and pigments and/or fillers. .

Patent Document 2 discloses (A) a salt-type drug, (B) a hydrophilic nonionic surfactant, (C) an N-long-chain acyl acidic amino acid monosalt, (D) two or more higher fatty acids and a higher fatty acid soap. an alkali, (E) a higher alcohol, (F) an oil, and (G) water, and the emulsified particles are made fine by high-pressure emulsification.

Patent Document 3 discloses (A) 0.01 to 2.0% by mass of a water-soluble gelling agent, (B) 0.01 to 1.0% by mass of a water-soluble thickening agent, and (C) a gemini type anion. 0.01 to 2.0% by mass of a surfactant, (D) a water-soluble whitening agent, (E) an electrolyte other than (D), and (F) an oil agent, an oil-in-water emulsion composition is disclosed. ing.

Japanese Patent Publication No. 2016-529275 JP 2012-126705 A JP 2019-142825 A

In oil-in-water emulsified cosmetics, generally, hydrophobized particles are blended in the oil phase (oil droplets), and salt-type or acid-type drugs are blended in the water phase (dispersion medium).

And, as described in Patent Document 1 ([0010]), Patent Document 2 ([0002] [0003]) and Patent Document 3 ([0002]), powders (for example, pigments , fillers), salt-type agents, etc. are known to destabilize the emulsifying performance of oil-in-water emulsified cosmetics.

Also, for example, when relatively large-sized pigment-grade hydrophobized particles are used as the hydrophobized particles to be blended in the oil-in-water emulsified cosmetic for the purpose of expressing a tone-up effect that brightens the skin color. There is

When an oil-in-water emulsified cosmetic containing such hydrophobized particles in the oil phase (oil droplets) is applied to the skin, the oil droplets containing the hydrophobized particles are in a state in which the oil is attracted by the particles. Therefore, it is likely to be adsorbed and stay near the ridges or grooves of the skin, which have high surface activity. As a result, an oil containing hydrophobized particles (for example, pigment-grade hydrophobized particles) is difficult to apply evenly on the skin, which may cause tone-up unevenness.

Therefore, the subject of the present disclosure provides an oil-in-water emulsified cosmetic that contains pigment-grade hydrophobized particles and a salt-type or acid-type whitening agent and/or anti-inflammatory agent and has excellent emulsion stability and tone-up properties. It is to be.

<Aspect 1>
An oil-in-water emulsified cosmetic comprising a dispersion medium containing water and oil droplets dispersed in the dispersion medium,
The dispersion medium contains at least one selected from the group consisting of whitening agents and anti-inflammatory agents, and pigment-grade hydrophobized particles,
The whitening agent contains at least one selected from the group consisting of salt-type whitening agents and acid-type whitening agents,
The anti-inflammatory agent contains at least one selected from the group consisting of salt-type anti-inflammatory agents and acid-type anti-inflammatory agents,
Oil-in-water emulsified cosmetic.
<Aspect 2>
The cosmetic according to aspect 1, wherein the oil droplets contain a nonionic surfactant.
<Aspect 3>
The cosmetic according to aspect 1 or 2, wherein the oil droplets contain a higher alcohol.
<Aspect 4>
4. The cosmetic material according to any one of aspects 1 to 3, wherein the dispersion medium contains a polyether-modified silicone having an HLB of more than 10.0 and not more than 18.0.
<Aspect 5>
The cosmetic according to aspect 4, wherein the mass ratio of the pigment-grade hydrophobized particles to the polyether-modified silicone is 10 or more.
<Aspect 6>
The salt-type whitening agent is ascorbate, tranexamate, glycyrrhizinate, nicotinate, kojicate, ellagate, 1-piperidinepropionate, 3-O-ethyl-L-ascorbate, and alkoxysalicylate, and the acid-type whitening agent is ascorbic acid, tranexamic acid, glycyrrhizic acid, nicotinic acid, kojic acid, ellagic acid, 1-piperidinepropionic acid, 3-O -ethyl-L-ascorbic acid, and at least one selected from the group consisting of alkoxysalicylic acid, cosmetics according to any one of aspects 1 to 5.
<Aspect 7>
The cosmetic according to any one of aspects 1 to 6, wherein the anti-inflammatory agent is at least one selected from the group consisting of L-ascorbylmagnesium phosphate, dipotassium glycyrrhizinate and ammonium glycyrrhizinate.
<Aspect 8>
At least one selected from the group consisting of the salt-type whitening agent, the acid-type whitening agent, the salt-type anti-inflammatory agent, and the acid-type anti-inflammatory agent, with respect to the total amount of the whitening agent component and the anti-inflammatory agent component, The cosmetic according to any one of aspects 1 to 7, containing 50% by mass or more.
<Aspect 9>
The cosmetic according to any one of aspects 1 to 8, wherein the pigment-grade hydrophobized particles have an average particle size of 250 nm or more.
<Aspect 10>
The cosmetic according to any one of aspects 1 to 9, wherein the content of the thickener is 1% by mass or less.

According to the present disclosure, an oil-in-water emulsified cosmetic containing pigment-grade hydrophobized particles and a salt-type or acid-type whitening agent and/or anti-inflammatory agent and having excellent emulsion stability and tone-up properties is provided. can be done.

(a) is a schematic diagram of an oil-in-water emulsified cosmetic according to one embodiment of the present disclosure, and (b) is a schematic diagram of a state in which the cosmetic is applied to the skin and the moisture is dried, ( c) is a schematic diagram of a state in which the cosmetics are familiar with the skin. (a) is a schematic diagram of an oil-in-water emulsified cosmetic containing oil droplets containing pigment-grade hydrophobized particles, and (b) is a schematic diagram of a state in which the cosmetic is applied to the skin.

The embodiments of the present disclosure will be described in detail below. The present disclosure is not limited to the following embodiments, and various modifications can be made within the scope of the spirit of the invention.

The oil-in-water emulsified cosmetic of the present disclosure includes a dispersion medium containing water and oil droplets dispersed in the dispersion medium, and the dispersion medium is at least selected from the group consisting of whitening agents and anti-inflammatory agents. and pigment-grade hydrophobized particles, the whitening agent includes at least one selected from the group consisting of a salt-type whitening agent and an acid-type whitening agent, and the anti-inflammatory agent is a salt-type anti-inflammatory agent and an acid-type anti-inflammatory agent. It contains at least one selected from the group consisting of anti-inflammatory agents.

Although not limited by the principle, the cosmetic of the present disclosure contains pigment-grade hydrophobized particles and salt-type or acid-type whitening agents and/or anti-inflammatory agents, but emulsification stability It is believed that the principle of action of the superiority and tone-up properties is as follows.

As described above, it is well known that the use of powders (eg, pigments, fillers), salt-type agents, etc. generally destabilizes the emulsifying performance of oil-in-water emulsified cosmetics. However, the present inventors found that when a salt-type or acid-type whitening agent and/or an anti-inflammatory agent is simultaneously blended with the pigment-grade hydrophobized particles in the dispersion medium (aqueous phase) of the oil-in-water emulsified cosmetic, It was found that the emulsification stability of oil-in-water emulsified cosmetics is improved.

When an oil-in-water emulsified cosmetic contains powders (e.g., pigments, fillers), salt-type agents, etc., each of them individually has a certain amount of electric charge, and thus emulsified particles ( It is thought that it acts so as to destroy the emulsification balance of oil droplets). On the other hand, the cosmetics of the present disclosure contain a salt-type or acid-type whitening agent and/or an anti-inflammatory agent together with pigment-grade hydrophobized particles. It is believed that salt-type or acid-type whitening agents and anti-inflammatory agents carry a negative charge in the aqueous phase, while the pigment-grade hydrophobized particles carry a positive charge. As a result, the attraction between the salt-type or acid-type whitening agent and anti-inflammatory agent and the pigment-level hydrophobized particles becomes dominant, and the effect on the emulsified particles (oil droplets) is reduced. I think that will improve.

Also, as described above, when obtaining an oil-in-water emulsified cosmetic containing hydrophobicized particles, the hydrophobicized particles are generally blended in the oil phase because they are hydrophobic. However, the present inventors have found that when pigment-level hydrophobized particles are blended in the aqueous phase of an oil-in-water emulsified cosmetic, the tone-up effect is improved when such cosmetic is applied to the skin. .

In conventional oil-in-water emulsified cosmetics containing pigment-level hydrophobized particles in the oil phase, as shown in FIG. 2(a), the pigment-level hydrophobized particles 20 are densely packed in the oil phase. I think it exists in

When an oil-in-water emulsified cosmetic containing such pigment-level hydrophobized particles in the oil phase is applied to the skin, as shown in FIG. It is thought that, in a state where it is clogged with water, it tends to adsorb relatively non-uniformly near the ridges or sulci of the skin, which are lipophilic and have high surface activity.

On the other hand, in the oil-in-water emulsified cosmetic of the present disclosure containing pigment-level hydrophobized particles in the aqueous phase, the pigment-level hydrophobized particles 20 are shown in FIG. Compared to oil-in-water emulsified cosmetics containing pigment-grade hydrophobized particles in the oil phase, it is believed that it is more likely to be uniformly adsorbed and retained on the skin. As a result, since the pigment-level hydrophobized particles that contribute to the tone-up effect are evenly arranged on the skin, the tone-up effect is greater than that of oil-in-water emulsified cosmetics containing pigment-level hydrophobized particles in the oil phase. will improve.

《Oil-in-water emulsified cosmetic》
<Dispersion medium>
The dispersion medium (aqueous phase) in the oil-in-water emulsified cosmetic composition of the present disclosure contains at least one selected from the group consisting of water, pigment-grade hydrophobized particles, whitening agents and anti-inflammatory agents.

(water)
The amount of water to be blended is not particularly limited. For example, from the viewpoint of emulsion stability, 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more, and 70% by mass of the total amount of the cosmetic. or 80% by mass or more, or 90% by mass or less, 80% by mass or less, 70% by mass or less, or 60% by mass or less.

The water that can be used in the oil-in-water emulsified cosmetic of the present disclosure is not particularly limited, and for example, water used in cosmetics and quasi-drugs can be used. For example, deionized water, distilled water, ultrapure water, and tap water can be used.

(Pigment grade hydrophobized particles)
The blending amount of the pigment-grade hydrophobized particles is not particularly limited, and can be appropriately selected based on the desired effect (for example, tone-up effect, SPF) according to the application. The blending amount of the pigment-grade hydrophobized particles may be, for example, 0.5% by mass or more, 1.0% by mass or more, or 1.5% by mass or more with respect to the total amount of the cosmetic, and It can be 15% by mass or less, 12% by mass or less, 10% by mass or less, 8.0% by mass or less, 6.0% by mass or less, or 5.0% by mass or less.

The average particle size of the pigment-grade hydrophobized particles can be appropriately selected so as to obtain the desired effect (for example, tone-up effect, SPF) according to the application. The average particle diameter of the pigment-grade hydrophobized particles can be, for example, 250 nm or more, 300 nm or more, 350 nm or more, or 400 nm or more. Pigment-grade hydrophobized particles having an average particle diameter of 300 nm or more can suitably exhibit a tone-up effect for brightening skin color. The upper limit of the average particle size is not particularly limited, for example, 100 μm or less, 70 μm or less, 50 μm or less, 30 μm or less, 10 μm or less, 5 μm or less, 1 μm (1,000 nm) or less, 800 nm or less, 700 nm or less, or 600 nm or less. can be Here, the average particle size of the pigment-grade hydrophobized particles in the present disclosure and the hydrophobized fine particles of an optional component to be described later may be the size of primary particles or aggregated secondary particles. can be calculated by

The hydrophobization treatment of the pigment-grade hydrophobized particles is not particularly limited, and any treatment that modifies the surface of such particles with an organic compound to make them hydrophobic, such as methylhydrogenpolysiloxane, dimethylpolysiloxane (dimethicone), silicone-based treatment or silane-based treatment with alkylsilane or the like; fluorine-based treatment with perfluoroalkyl phosphate, perfluoroalcohol or the like; titanate-based treatment with alkyl titanate or the like; amino acid treatment with N-acylglutamic acid or the like; , lecithin treatment; metal soap treatment; fatty acid treatment; and alkyl phosphate treatment. Hydrophobic treatment can be used alone or in combination. Moreover, the hydrophobizing treatment can be carried out using a hydrophobizing agent.

Examples of silicones used as hydrophobizing agents include known silicones having hydrogen-silicon bonds such as methylhydrogenpolysiloxane (dimethicone/methicone) copolymers. In addition, triethoxysilylethylpolydimethylsiloxyethyldimethicone, triethoxysilylethylpolydimethylsiloxyethylhexyldimethicone, etc., having an alkoxy group-silicon bond as a reactive group can also be mentioned. In addition, dimethylpolysiloxane and the like can also be used.

Examples of silane-based treatment agents include silylating agents into which organic groups are introduced, and silane coupling agents, such as triethoxycaprylylsilane.

Examples of titanate-based treatment agents include titanium coupling agents such as alkyl titanates, pyrophosphate-type titanates, phosphorous acid-type titanates, and amino acid-type titanates.

The type of particles constituting the pigment-grade hydrophobized particles is not particularly limited, and can be appropriately selected so as to obtain the desired effect (eg, tone-up effect, SPF) according to the application. Examples of pigment-grade hydrophobized particles include inorganic particles, specifically inorganic oxide particles, for example, white inorganic oxide particles such as titanium oxide particles, zinc oxide particles, and cerium oxide particles ("inorganic white may be referred to as "system pigment".) and the like. In addition, inorganic particles that are generally classified as pearlescent agents (bright pigments), colorants, or phosphors can also be used as the pigment-grade hydrophobized particles of the present disclosure. Organic particles can also be used as the pigmentary hydrophobized particles of the present disclosure. The pigment-grade hydrophobized particles can be used alone or in combination of two or more.

In the present disclosure, the term "pearl agent" means particles that exhibit luster without including a coloring material and a phosphor. A pearlescent agent typically has a plate-like form such as flakes or scales. In the present disclosure, the term “coloring material” refers to a material that presents a color other than white, does not contain pearlescent agents and phosphors, and does not exhibit luster that can cause the cosmetic to develop color. For example, from the viewpoint of tone-up effect, when using a pearlescent agent, it is preferable to use it together with inorganic oxide particles such as titanium oxide particles and / or phosphors described above. It is preferable to use together at least one selected from inorganic oxide particles such as titanium oxide particles, pearlescent agents, and phosphors.

Pearl agents include, for example, mica titanium (mica titanium), iron oxide-coated mica titanium, carmine-coated mica titanium, carmine/conjo-coated mica titanium, iron oxide/carmine-treated mica titanium, konjo-treated mica titanium, and iron oxide/conjo treatment. Titanium mica, chromium oxide-treated titanium mica, black titanium oxide-treated titanium mica, acrylic resin-coated aluminum powder, silica-coated aluminum powder, silica-coated mica, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored oxide Titanium-coated mica, titanium oxide-coated synthetic mica, titanium oxide-coated silica, titanium oxide-coated alumina, titanium oxide-coated glass powder, polyethylene terephthalate/polymethyl methacrylate laminated film powder, bismuth oxychloride, fish scale foil, mica mixed with iron oxide and titanium oxide Iron oxide titanium oxide-coated mica such as iron oxide titanium oxide-coated mica coated with . They are typically white or some other color.

A colorless pearlescent agent can also be used as the pearlescent agent. As such a pearlescent agent, a known transparent pearlescent agent (transparent luster pigment) can be used. For example, a pearlescent agent can be used in which a glass particle is used as a base material and a coating film composed of a high refractive index material such as titanium oxide is formed on the surface of the base material.

For example, an inorganic pigment can be used as the coloring material.

Examples of inorganic pigments include inorganic red pigments (e.g., iron oxide (red iron oxide), iron titanate, etc.); inorganic brown pigments (e.g., γ-iron oxide, etc.); inorganic yellow pigments (e.g., yellow iron oxide , ocher, etc.); inorganic black pigments (e.g., black iron oxide, low order titanium oxide, etc.); inorganic purple pigments (e.g., manganese violet, cobalt violet, etc.); inorganic green pigments (e.g., chromium oxide, hydroxide chromium, cobalt titanate, etc.); inorganic blue pigments (eg, ultramarine blue, Prussian blue, etc.); metal powders (eg, aluminum, gold, silver, copper, etc.).

Phosphors include, for example, MnCl ₂ (red), Sm ₂ (SO ₄ ) _3.8H ₂ O (orange), CaWO ₄ (blue), MgWO ₄ (bluish white), CaMoO ₄ (yellow green), KCl: Tl (blue-green), NaCl:Mn (red), ZnO:Zn (white-green), CaS:Bi (purple), ZnS:Cu (yellow _- green), ZnS:Ag ₍ purple), Zn2SiO4:Mn ( green), _Ca3(PO4)2 _: _Ce :Mn (red), Y2O3:Eu, _YVO4 :Eu, _Y2O2S :Eu, ₍ Y,Cd) _BO3 :Eu _, ₀ . _5MgF2GeO2 :Mn, _Zn2GeO4 :Mn, ZnS:Cu, ZnS:Cu,Al, ₍ Zn,Cd)S:Cu, _Zn2SiO4 : _Mn , _BaMgAl14O23 : _Eu2 ⁺ , _Mn2 ⁺ , SrGa2S4: _Eu2 ⁺ , ZnS:Cu,Co, ZnS:Ag,Cu, _Y2SiO5 : ^Ca , _ZnS :Ag, _Ga , _Cl , _Ga2B5O9Cl : _Eu2 ₊ _BaMgAl14O23 : Eu ²⁺ , (Zn, Cd) S: Ag, (Zn, Cd) S: Ag, Al, (Zn, Cd) S: Au, Al, ZnS: Cu, Au, Al, Zn(S, Se): Ag, Zn(S, Se): Ag, Al, Zn(S, Se): Cu, Zn ₍ S, Se): Cu, Al, ZnO: Zn, _Zn2SiO4 : Mn, ZnS: Ag, Cu, ZnS:Pb,Cu, _Gd2O2S :Tb, _La2O2S : _Tb , _Y3Al5O12 :Ce, ₍ Y _, _Gd ) _3Al5O12 : _Ce , _SrGa2S4 : _Eu , _Y2O2S :Tb, _Y2SiO5 :Tb, _3.5MgGeO2 :Mn, _{3BaMgO.8Al2O3} : _Eu2 ⁺ , _Mn2 ⁺ _, and _{3BaMgO.8Al2O3} : _Eu2 ⁺ . Other examples include a luminescent composition containing predetermined amounts of In ₂ O ₃ and ZnS:Ag, and a luminescent composition containing predetermined amounts of ZnO and ZnS:Ag phosphor. Among these, zinc oxide phosphor (ZnO:Zn) is preferable from the viewpoint of safety. A zinc oxide phosphor can be obtained by firing zinc oxide in a reducing atmosphere such as H ₂ or CO. In addition, a magnesium titanate phosphor can also be suitably used.

(whitening agent)
In some embodiments, the oil-in-water emulsified cosmetic of the present disclosure contains at least one selected from the group consisting of a salt-type whitening agent and an acid-type whitening agent as a whitening agent in a dispersion medium (aqueous phase). include.

The amount of the whitening agent is not particularly limited. .5% by mass or more, 0.7% by mass or more, or 1.0% by mass or more, and 15.0% by mass or less, 10.0% by mass or less, 8.0% by mass or less, or It can be 5.0% by mass or less.

Such a whitening agent is not particularly limited as long as it exhibits a whitening effect. Examples include ascorbic acid (L-ascorbic acid), tranexamic acid, glycyrrhizic acid, nicotinic acid, kojic acid, ellagic acid, 1-piperidinepropionic acid, 3-O-ethyl-L-ascorbic acid, and alkoxysalicylic acid (such as 4-methoxysalicylic acid); at least one acid-type whitening agent selected from; At least one salt-type whitening agent selected from O-ethyl-L-ascorbate and alkoxysalicylate (eg, 4-methoxysalicylate). Salts of salt-type whitening agents include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; zinc salts; iron salts; ammonium salts; salts with basic amino acids; and salts with amines such as monoethanolamine, diethanolamine and triethanolamine. Salt-type whitening agents and acid-type whitening agents can be used alone or in combination of two or more.

A whitening agent other than salt-type whitening agents and acid-type whitening agents (sometimes referred to as "other whitening agents") may be used in combination. Examples of such whitening agents include ascorbic acid derivatives (eg, ascorbic acid glucoside), tranexamic acid derivatives, glycyrrhizic acid derivatives, nicotinic acid derivatives (eg, niacinamide), kojic acid derivatives (eg, kojic acid dipalmitate), ellagic acid derivatives, Alkoxysalicylic acid derivatives, hydroquinone, α-arbutin, β-arbutin, nicotinamide, astaxanthin, histidine dithiooctanamide (Na/zinc), chamomile extract, licorice extract, placenta extract, rosemary extract, lucinol, magnolignan, etc. mentioned. Other whitening agents can be used alone or in combination of two or more.

When the cosmetic of the present disclosure contains a salt-type whitening agent and/or an acid-type whitening agent, it simultaneously contains pigment-grade hydrophobized particles in the aqueous phase, so that the salt-type whitening agent and/or acid-type whitening agent is used as the whitening agent. Even if the whitening agent is contained at a high level, the emulsion stability of the cosmetic can be improved. Specifically, the cosmetic of the present disclosure contains at least one selected from the group consisting of salt-type whitening agents and acid-type whitening agents in an amount of 50% by mass or more, 60% by mass or more, based on the total amount of the whitening agent components, 70 mass % or more, 80 mass % or more, or 90 mass % or more can be included.

(anti-inflammatory agent)
In some embodiments, the oil-in-water emulsified cosmetic of the present disclosure contains an anti-inflammatory agent selected from the group consisting of a salt-type anti-inflammatory agent and an acid-type anti-inflammatory agent in a dispersion medium (aqueous phase). Contains at least one.

The amount of the anti-inflammatory agent is not particularly limited. 0.5% by mass or more, 0.7% by mass or more, or 1.0% by mass or more, and 15.0% by mass or less, 10.0% by mass or less, 8.0% by mass or less, Alternatively, it can be 5.0% by mass or less.

Such an anti-inflammatory agent is not particularly limited as long as it exhibits an anti-inflammatory effect. However, agents that exhibit both skin-lightening and anti-inflammatory properties are treated as skin-lightening agents in the present disclosure. Examples of anti-inflammatory agents include L-ascorbyl magnesium phosphate, glycyrrhizin, dipotassium glycyrrhizinate, ammonium glycyrrhizinate, allantoin, and the like. Salt-type anti-inflammatory agents and acid-type anti-inflammatory agents can each be used alone or in combination of two or more.

Anti-inflammatory agents other than salt-type anti-inflammatory agents and acid-type anti-inflammatory agents (sometimes referred to as "other anti-inflammatory agents") may be used in combination. When the cosmetic of the present disclosure contains a salt-type anti-inflammatory agent and/or an acid-type anti-inflammatory agent, it simultaneously contains pigment-grade hydrophobized particles in the aqueous phase. / Or even if the acid type anti-inflammatory agent is highly contained, the emulsification stability of the cosmetic can be improved. Specifically, the cosmetic of the present disclosure contains at least one selected from the group consisting of salt-type anti-inflammatory agents and acid-type anti-inflammatory agents in an amount of 50% by mass or more and 60% by mass of the total amount of anti-inflammatory agent components. % or more, 70 mass % or more, 80 mass % or more, or 90 mass % or more.

Considering the above-mentioned whitening agents, the cosmetics of the present disclosure contain at least one selected from the group consisting of salt-type whitening agents, acid-type whitening agents, salt-type anti-inflammatory agents, and acid-type anti-inflammatory agents. , 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more relative to the total amount of the whitening agent component and the anti-inflammatory agent component.

Further, from the viewpoint of emulsion stability of cosmetics, the mass ratio of the pigment-grade hydrophobized particles to the total amount of the whitening agent component and the anti-inflammatory agent component is 5.0 or less, 4.5 or less, 4.0 or less, It is preferably 3.5 or less, 3.0 or less, 2.5 or less, 2.0 or less, 1.5 or less, 1.0 or less, less than 1.0, or 0.9 or less. The lower limit of the mass ratio is preferably 0.1 or more, 0.3 or more, or 0.5 or more.

<Oil droplet>
The oil droplets as the oil phase or dispersed phase in the oil-in-water emulsified cosmetic contain oil.

(oil content)
The oil content in the oil-in-water emulsified cosmetic of the present disclosure is not particularly limited. 5.0% by mass or more, 7.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, or 30% by mass or more, and 50% by mass or more % by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, or 10% by mass or less.

Cosmetics having a high oil content, for example, 20% by mass or more, can be blended in the oil phase. Therefore, the UV protection effect (SPF) can be further improved.

The type of oil is not particularly limited, and for example, volatile oil and non-volatile oil can be used. An oil component can be used individually or in combination of 2 or more types. Here, "volatile" is intended to exhibit a volatile content of more than 5% when left at 105°C under atmospheric pressure for 3 hours. From the viewpoint of film uniformity, etc., the volatile content, which is a guideline for volatility, should be 10% or more, 20% or more, 40% or more, 50% or more, 60% or more, 80% or more, or 100%. is preferred. Alternatively, the boiling point at 1 atmosphere (101.325 kPa) can be used as an indicator of volatility. The boiling point is preferably 250° C. or lower, 240° C. or lower, or 230° C. or lower from the viewpoint of uniformity of the film, or It is preferably 160° C. or higher. In addition, in the present disclosure, "non-volatile" intends to exhibit a volatile content of 5% or less when left at 105°C for 3 hours.

The volatile oil is not particularly limited, and examples include volatile silicone oil and volatile hydrocarbon oil. A volatile oil can be used individually or in combination of 2 or more types.

Volatile silicone oils include, for example, volatile acyclic silicone oils and volatile cyclic silicone oils. Among these, volatile acyclic silicone oils are preferred.

As volatile acyclic silicone oils, for example, volatile linear silicone oils and volatile branched silicone oils can be used. Among these, volatile linear silicone oils are preferred.

Volatile linear silicone oils include, for example, dimethylpolysiloxane with a viscosity of 0.65 cSt (sometimes referred to as "dimethicone"), dimethylpolysiloxane with a viscosity of 1 cSt, dimethylpolysiloxane with a viscosity of 1.5 cSt, and dimethylpolysiloxane with a viscosity of 2 cSt. and low-molecular-weight linear dimethylpolysiloxane such as dimethylpolysiloxane. Among them, dimethylpolysiloxane having a viscosity of 1 cSt and dimethylpolysiloxane having a viscosity of 1.5 cSt are preferable. Here, these viscosities are intended to be kinematic viscosities at 25°C.

Volatile branched silicone oils include, for example, low-molecular-weight branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane.

Volatile cyclic silicone oils include, for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

Volatile hydrocarbon oils include, for example, heptane, isododecane, isohexadecane, and isodecane. Among them, isododecane is preferred.

The amount of volatile oil blended in the oil is, for example, 0% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, based on the total oil content. It can be 90% by mass or more, 85% by mass or less, 80% by mass or less, 75% by mass or less, or 70% by mass. 65% by mass or less, 60% by mass or less, 55% by mass or less, or 50% by mass or less. The rest of the oil in this case can be non-volatile oil.

In addition to the above-described volatile oils, the oils include oils commonly used in cosmetics, such as liquid oils, solid oils, waxes, hydrocarbon oils other than the above, silicone oils other than the above, polar oils, and higher alcohols. etc. can be mentioned. When other oils (e.g., non-volatile oils) are used together with the volatile oil, after the volatile oil volatilizes, such other oils can function as a binder between the particles and the skin. Particles can be suitably immobilized. Other oil components can be used alone or in combination of two or more. Here, some UV absorbers act as oils, especially polar oils. Such ultraviolet absorbers can also be regarded as oils.

Examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, and linseed oil. , safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, sinagi oil, Japanese pear oil, jojoba oil, germ oil, and triglycerin.

Examples of solid fats and oils include cacao butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, mutton tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, Japanese wax kernel oil, hydrogenated oil, beef Leg fat, Japanese wax, and hydrogenated castor oil.

Waxes include, for example, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, wart wax, whale wax, montan wax, bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, isopropyl lanolin fatty acid, hexyl laurate, Reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether.

Examples of hydrocarbon oils include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and olefin oligomers.

Examples of silicone oils include linear silicones such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (diphenylsiloxyphenyltrimethicone), and methylhydrogenpolysiloxane having a viscosity of 6 cSt or more.

As the polar oil, for example, a polar oil with an IOB of 0.10 or more can be used. Examples of such polar oils include isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), isopropyl palmitate (IOB value = 0.16), butyl stearate ( IOB value = 0.14), hexyl laurate (IOB value = 0.17), myristyl myristate (IOB value = 0.11), decyl oleate (IOB value = 0.11), isononyl isononanoate (IOB value = 0.20), isotridecyl isononanoate (IOB value = 0.15), cetyl ethylhexanoate (IOB value = 0.13), pentaerythrityl tetraethylhexanoate (IOB value = 0.35), diethylhexyl succinate (IOB value = 0.32), dioctyl succinate (IOB value = 0.36), glycol distearate (IOB value = 0.16), glyceryl diisostearate (IOB value = 0.29), neopentyl glycol dicaprate. (IOB value = 0.25), diisostearyl malate (IOB value = 0.28), trimethylolpropane triisostearate (IOB value = 0.16), glyceryl tri-2-ethylhexanoate (triethylhexanoin) (IOB value = 0.35), trimethylolpropane trioctanoate (IOB value = 0.33), trimethylolpropane triisostearate (IOB value = 0.16), diisobutyl adipate (IOB value = 0.46), N-lauroyl-L-glutamic acid-2-octyldodecyl ester (IOB value = 0.29), 2-hexyldecyl adipate (IOB value = 0.16), diisopropyl sebacate (IOB value = 0.40), methoxy Ethylhexyl cinnamate (IOB value = 0.28), 2-ethylhexyl palmitate (IOB value = 0.13), 2-ethylhexyl ethylhexanoate (IOB value = 0.2), triisostearin (IOB value = 0.16 ), PPG-3 dipivalate (IOB value=0.52), and tri(caprylic/capric)glyceryl (IOB value=0.33).

Examples of UV absorbers that can be regarded as oils include UV absorbers with an IOB of 0.10 or more, specifically ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, t-butylmethoxydibenzoylmethane. , ethylhexyltriazon, bisethylhexyloxyphenolmethoxyphenyltriazine, hexyl diethylaminohydroxybenzoylbenzoate, oxybenzone-3, methylenebisbenzotriazolyltetramethylbutylphenol, homosalate, and ethylhexyl salicylate. be able to. These ultraviolet absorbers can be used alone or in combination of two or more.

The IOB value of the polar oil and UV absorber can be, for example, 0.11 or more, 0.12 or more, or 0.13 or more, and 0.50 or less, 0.45 or less, or 0.40 or less. can be Here, the IOB value is an abbreviation for Inorganic/Organic Balance (inorganic/organic ratio), which is a value representing the ratio of the inorganic value to the organic value, and is an index indicating the degree of polarity of an organic compound. It becomes. The IOB value is specifically expressed as IOB value=inorganic value/organic value. For each of the "inorganicity value" and the "organicity value", various The "inorganic value" and "organic value" are set according to the atom or functional group, and the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound are accumulated. (See, for example, Yoshio Koda, "Organic Conceptual Diagram-Basics and Applications-", pp. 11-17, Sankyo Publishing, 1984).

Examples of higher alcohols that can be used include those having a carbon chain length of 16 or more, and specific examples include lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, and monostearyl. linear or branched higher alcohols such as glycerene ether (bacyl alcohol), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol and octyldodecanol;

<Optional component>
The oil-in-water emulsified cosmetic composition of the present disclosure can be appropriately blended with various components within a range that does not adversely affect the effects of the present disclosure. Examples of various components include additive components that can be usually blended in cosmetics, such as anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, moisturizers, thickeners ( water-soluble thickeners, oil-soluble thickeners), water-soluble polymers, oil-soluble polymers, film-forming agents such as siliconized polysaccharides, higher fatty acids (e.g. isostearic acid, behenic acid), sequestering agents, Lower alcohols such as ethanol, polyhydric alcohols, various extracts, sugars, amino acids, organic amines, polymer emulsions, chelating agents, UV absorbers other than the above UV absorbers, pH adjusters, neutralizers, skin Nutrients, vitamins, pharmaceuticals, quasi-drugs, water-soluble agents applicable to cosmetics, buffers, anti-fading agents, preservatives, dispersants, percutaneous absorption inhibitors, propellants, fillers (e.g. silica, etc.) usable powders), pigments other than the pigments usable in the above pearlescent agents and coloring materials (for example, organic pigments), stabilizers, hydrophobized fine particles, dyes, pigments, fragrances, and the like. Optional components can be blended in the oil phase and/or the water phase, and can be used alone or in combination of two or more. Some of these ingredients are described below.

(Nonionic surfactant)
In some embodiments, the oil-in-water emulsified cosmetic of the present disclosure contains a nonionic surfactant. Such active agents can typically function as emulsifiers, so emulsified particles (oil droplets) can include such active agents.

Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, polyalkylene glycol fatty acid esters, POE hydrogenated castor oil derivatives, POE alkyl ethers, POE/POP alkyl ethers, PEG fatty acid esters, polyglycerin fatty acid esters. , POE glycerin fatty acid esters, PEG glyceryl isostearate, and silicone surfactants. In addition, nonionic surfactants such as polyglyceryl-2 diisostearate and sorbitan sesquiisostearate can also be used. A nonionic surfactant can be used individually or in combination of 2 or more types.

Examples of polyoxyalkylene alkyl ethers include polyoxyethylene behenyl ether and polyoxyethylene stearyl ether.

Examples of polyalkylene glycol fatty acid esters include polyethylene glycol monostearate and polyethylene glycol monooleate.

Examples of POE hydrogenated castor oil derivatives (PEG hydrogenated castor oil) include POE (20-100) hydrogenated castor oil derivatives. Specific examples include POE (20) hydrogenated castor oil derivative, POE (40) hydrogenated castor oil derivative, POE (60) hydrogenated castor oil derivative, and POE (100) hydrogenated castor oil derivative.

Examples of POE alkyl ethers include POE (2) lauryl ether, POE (4.2) lauryl ether, POE (9) lauryl ether, POE (5.5) cetyl ether, POE (7) cetyl ether, POE ( 10) Cetyl ether, POE (15) cetyl ether, POE (20) cetyl ether, POE (23) cetyl ether, POE (4) stearyl ether, POE (20) stearyl ether, POE (7) oleyl ether, POE (10) ) oleyl ether, POE (15) oleyl ether, POE (20) oleyl ether, POE (50) oleyl ether, POE (10) behenyl ether, POE (20) behenyl ether, POE (30) behenyl ether, POE (2) (C12-15) alkyl ether, POE (4) (C12-15) alkyl ether, POE (10) (C12-15) alkyl ether, POE (5) secondary alkyl ether, POE (7) secondary alkyl ether, Mention may be made of POE(9) alkyl ethers and POE(12) alkyl ethers.

Examples of POE/POP alkyl ethers include POE (1) polyoxypropylene (POP) (4) cetyl ether, POE (10) POP (4) cetyl ether, POE (20) POP (8) cetyl ether, POE (20) POP(6) decyltetradecyl ether and POE(30) POP(6) decyltetradecyl ether can be mentioned.

PEG fatty acid esters include, for example, polyethylene glycol monolaurate (hereinafter abbreviated as PEG) (10), PEG monostearate (10), PEG monostearate (25), PEG monostearate (40), monostearate Mention may be made of PEG acid (45), PEG monostearate (55), PEG monostearate (100), PEG monooleate (10), PEG distearate, and PEG diisostearate.

Examples of polyglycerol fatty acid esters include hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, Mention may be made of decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl distearate, and decaglyceryl diisostearate.

Examples of POE glycerin fatty acid esters include polyoxyethylene (POE) (5) glyceryl monostearate, POE (15) glyceryl monostearate, POE (5) glyceryl monooleate, and POE (15) monooleate. Mention may be made of glyceryl.

Examples of PEG glyceryl isostearate include, for example, PEG (8) glyceryl isostearate, PEG (10) glyceryl isostearate, PEG (15) glyceryl isostearate, PEG (20) glyceryl isostearate, PEG (25) glyceryl isostearate, PEG (30) glyceryl isostearate, PEG (40) glyceryl isostearate, PEG (50) glyceryl isostearate, and PEG (60) glyceryl isostearate can be mentioned.

Examples of silicone surfactants include PEG(7) dimethicone and PEG(10) dimethicone.

The content of the nonionic surfactant is not particularly limited. % by mass or more, and 3.0% by mass or less, 2.5% by mass or less, 2.0% by mass or less, 1.5% by mass or less, 1.0% by mass or less, or 0.5% by mass % by mass or less.

(dispersant)
In some embodiments, the oil-in-water emulsified cosmetic of the present disclosure contains a polyether-modified silicone having an HLB of more than 10.0 and not more than 18.0 (sometimes simply referred to as "polyether-modified silicone") in a dispersion medium. There is.). The polyether-modified silicone can function as a dispersant for pigment-grade hydrophobized particles and improve the emulsion stability and tone-up of oil-in-water emulsion cosmetics containing salt-type or acid-type whitening agents and/or anti-inflammatory agents. It is possible to further improve the performance. Polyether-modified silicone can be used individually or in combination of 2 or more types.

The HLB of the polyether-modified silicone is 10.5 or more, 11.0 or more, 11.5 or more, 12.5 or more, from the viewpoint of the dispersibility of the pigment-grade hydrophobized particles, emulsification stability of cosmetics, tone-up properties, and the like. It is preferably 0 or more, 12.5 or more, or 13.0 or more, and 17.5 or less, 17.0 or less, 16.5 or less, 16.0 or less, 15.5 or less, or 15.0 or less Preferably. As used herein, "HLB" is generally a value indicating affinity for water and oil, a parameter known as hydrophilic-lipophilic balance. The HLB of polyether-modified silicone can be easily determined by the Griffin method. Here, the HLB value by the Griffin method can be obtained by the following formula 1:
HLB value = 20 × sum of formula weights of hydrophilic moieties/molecular weight Formula 1

The amount of polyether-modified silicone to be blended is 0.01% by mass based on the total amount of the cosmetic, from the viewpoint of the dispersibility of the pigment-grade hydrophobized particles in the aqueous phase, the emulsification stability of the cosmetic, and the tone-up properties. 0.03% by mass or more, or 0.05% by mass or more, and 1.0% by mass or less, 0.8% by mass or less, 0.5% by mass or less, and 0.3% by mass or less, or 0.2% by mass or less.

From the viewpoint of the dispersibility of the pigment-level hydrophobized particles in the aqueous phase, the emulsification stability of the cosmetic, the tone-up property, etc., the mass ratio of the pigment-level hydrophobized particles to the polyether-modified silicone is, for example, 5 or more. , 7 or more, 10 or more, 12 or more, 14 or more, 15 or more, or 17 or more. , or 30 or less.

The type of polyether-modified silicone is not particularly limited as long as it has a specific HLB. Mention may be made of methyl ether dimethicone, PEG/PPG-20/20 dimethicone, PEG/PPG-20/23 dimethicone, and PEG-17 dimethicone. Among them, PEG-11 methyl ether dimethicone is preferred.

(thickener)
In general, it is difficult to improve the emulsion stability of oil-in-water emulsified cosmetics containing powders, salt-type drugs and the like. ensure the emulsification stability of cosmetics. However, although the addition of a thickener may improve the emulsion stability, it tends to give a sticky feeling.

On the other hand, the oil-in-water emulsified cosmetic of the present disclosure improves emulsion stability by simultaneously blending pigment-level hydrophobized particles and a salt-type or acid-type whitening agent and/or anti-inflammatory agent. Therefore, the cosmetic of the present disclosure may be substantially free of thickeners. That is, the thickener is 1% by mass or less, 0.5% by mass or less, 0.1% by mass or less, 0.01% by mass or less, or 0.001% by mass or less with respect to the total amount of the cosmetic. Although it may be blended, it is advantageous not to use a thickener from the viewpoint of stickiness and the like.

(Hydrophobic treated microparticles)
In some embodiments, the oil-in-water emulsified cosmetic of the present disclosure contains hydrophobized microparticles. From the viewpoint of UV protection effect, emulsion stability, etc., it is preferable to blend the hydrophobic-treated fine particles into the inner oil phase. Here, the above-described pigment-grade hydrophobized particles and hydrophobized microparticles can be distinguished by their sizes. In other words, the pigment-grade hydrophobized particles mean hydrophobized particles having a larger particle diameter than the hydrophobized fine particles.

The amount of the hydrophobized fine particles to be blended is not particularly limited, and can be appropriately selected based on the desired effect (for example, ultraviolet scattering effect) according to the application. % or more, 1.0 mass % or more, 1.5 mass % or more, 2.0 mass % or more, 2.5 mass % or more, 3.0 mass % or more, 3.5 mass % or more, 4.0 mass % 4.5% by mass or more, or 5.0% by mass or more, and 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8 .0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 3.0% by mass or less, 1.0% by mass or less, 0.5% by mass or less, or 0.1% by mass or less be able to.

For example, hydrophobized fine particles with an average particle diameter of 200 nm or less can exhibit an ultraviolet scattering effect. The average particle size of the hydrophobized fine particles can be appropriately selected based on the desired effect (for example, ultraviolet scattering effect) according to the application. Alternatively, it can be 80 nm or less. The lower limit of the average particle size of the hydrophobized fine particles is not particularly limited, but can be, for example, 10 nm or more, 20 nm or more, 30 nm or more, 40 nm or more, 50 nm or more, 60 nm or more, or 70 nm or more.

The hydrophobization treatment of the hydrophobized fine particles is not particularly limited, and for example, the same hydrophobization treatment as the above-described pigment-grade hydrophobized particles can be performed.

The type of particles constituting the hydrophobized fine particles is not particularly limited, and can be appropriately selected based on the desired effect (for example, ultraviolet scattering effect) according to the application. Titanium oxide, zinc oxide, barium sulfate, iron oxide, talc, mica, sericite, kaolin, mica titanium, Prussian blue, chromium oxide, chromium hydroxide, silica, cerium oxide and the like. The hydrophobized microparticles can be used alone or in combination of two or more. When the hydrophobized fine particles are used as an ultraviolet scattering agent, it is preferable to use particles having a refractive index of 1.5 or more, such as zinc oxide particles and titanium oxide particles, from the viewpoint of optical properties and the like.

<Viscosity of cosmetics>
In some embodiments, the oil-in-water emulsified cosmetic composition of the present disclosure has a viscosity of 10,000 mPa after one day of preparation at 30° C. of the cosmetic composition measured using the conditions and apparatus described in the examples below.・ s or less, 9,000 mPa s or less, 8,000 mPa s or less, 7,000 mPa s or less, or 6,000 mPa s or less, and 500 mPa s or more and 1,000 mPa s Above, it can be 1,500 mPa·s or more, 2,000 mPa·s or more, or 2,500 mPa·s or more. Since the cosmetic of the present disclosure simultaneously contains a salt-type or acid-type whitening agent and/or an anti-inflammatory agent together with pigment-grade hydrophobized particles, it exhibits good emulsification performance even under such viscosity. can be presented.

In some embodiments, the oil-in-water emulsified cosmetic composition of the present disclosure is 0° C., 25° C., or 4 weeks of production at 50° C. measured using the conditions and apparatus described in the examples below. The viscosity after treatment can be 10,000 mPa s or less, 9,000 mPa s or less, 8,000 mPa s or less, 7,000 mPa s or less, or 6,000 mPa s or less, or 500 mPa s or less. s or more, 1,000 mPa·s or more, 1,500 mPa·s or more, 2,000 mPa·s or more, or 2,500 mPa·s or more.

<<Method for preparing oil-in-water emulsified cosmetic>>
The method for preparing the oil-in-water emulsified cosmetic of the present disclosure is not particularly limited, and for example, it can be prepared by known methods such as a dispersion method and an aggregation method.

The dispersion method is a method of refining the aggregates of the dispersed phase by mechanical force. Specifically, it is a method of emulsifying using the crushing force of an emulsifier, and examples of such a method include a high-pressure emulsification method in which a high-pressure homogenizer is used to apply a high shearing force.

The coagulation method is a colloidal preparation method that utilizes surface chemical properties, and is a method in which a uniformly dissolved state is brought into a supersaturated state by some means to emerge as a dispersed phase. As specific methods, the HLB temperature emulsification method, the phase inversion emulsification method, the non-aqueous emulsification method, the D phase emulsification method, the liquid crystal emulsification method, and the like are known.

<<Dosage form of oil-in-water emulsified cosmetic>>
The dosage form of the oil-in-water emulsified cosmetic of the present disclosure is not particularly limited, and examples thereof include liquid, milky lotion, cream, gel, spray, and mousse. Here, in the present disclosure, "spray" can include mist type spray, aerosol type spray, and the like.

<<Uses of oil-in-water emulsified cosmetics>>
The oil-in-water emulsified cosmetic of the present disclosure can be used, for example, as a cosmetic that is spread and applied to the skin or the like. Here, cosmetics applied to the skin can also include so-called external preparations for skin.

The product form of the cosmetics of the present disclosure is not particularly limited, but for example, facial cosmetics such as lotions, beauty essences, milky lotions, and packs; makeup cosmetics such as foundations, lipsticks, and eye shadows; body cosmetics; hair cosmetics such as hair liquids, hair tonics, hair conditioners, shampoos, rinses and hair restorers; and ointments.

The oil-in-water emulsified cosmetic of the present disclosure will be described in more detail below with reference to examples, but the cosmetic of the present disclosure is not limited to these. Hereinafter, unless otherwise specified, the compounding amount is indicated by mass %.

<<Examples 1 to 9, Reference Examples 1 to 2 and Comparative Examples 1 to 6>>
The formulations shown in Tables 1 to 4 and the oil-in-water emulsified cosmetics obtained by the production methods shown below were subjected to the following tests, and the results are shown in Tables 1 to 4. Here, "O / W (aqueous phase)" in the table means an oil-in-water emulsified cosmetic in which particles are contained in the aqueous phase, and "O / W (oil phase)" means that the particles are An oil-in-water emulsified cosmetic contained in the oil phase is intended.

<Evaluation method>
(Rolling stability test: emulsion stability)
The prepared cosmetic is placed in a 50 mL transparent sample tube (3 cm in diameter), the sample tube is rotated at a speed of 45 rpm in an atmosphere of 25° C. for 4 hours, and the aggregation state of the particles is visually observed and evaluated according to the following criteria. did. Here, evaluations A to C can be regarded as pass, and evaluation D can be regarded as fail.

A: No color streaks associated with aggregates of particles were observed.
B: A very slight color stripe pattern was observed due to aggregates of particles.
C: Slight color stripes were observed due to aggregates of particles.
D: Color streaks due to particle aggregates were clearly observed.

(Tone-up evaluation test)
The prepared cosmetic was applied to the arm, the water was dried, and the cosmetic-applied surface was visually observed to evaluate the tone-up state according to the following criteria. Here, evaluations A to B can be regarded as pass, and evaluations C to D can be regarded as failure. In addition to the tone-up effect, this tone-up test can indirectly evaluate whether particles such as pigment-grade hydrophobized particles are evenly applied to the skin surface. That is, it can be said that particles such as pigment-grade hydrophobized particles are uniformly applied to the skin surface in the order of D, C, B, and A.

A: There was no unevenness in brightness, and an excellent tone-up effect was exhibited.
B: A good tone-up effect was obtained, although slight unevenness in brightness occurred.
C: There was slight unevenness in brightness, and a good tone-up effect was not obtained.
D: Clear unevenness in brightness occurred, and a good tone-up effect was not obtained.

(Particle dispersibility evaluation test)
The prepared cosmetic was placed in a 50 mL transparent sample tube (3 cm in diameter), and after storage at 25° C. for 7 days, the dispersed state of the particles was visually observed and evaluated according to the following criteria.

A: No sediment of pigment-grade hydrophobized particles was observed.
B: A very small amount of sediment of pigment-grade hydrophobized particles was observed.
C: Slight sedimentation of pigment-grade hydrophobized particles was observed.
D: Sediments of pigment-grade hydrophobized particles were clearly observed.

(Usability evaluation test)
Usability (stickiness) when each cosmetic was applied directly to the face was comprehensively evaluated by three expert panelists according to the following evaluation criteria.

A: No stickiness is felt.
B: Almost no stickiness is felt.
C: Stickiness is slightly felt.
D: Feels sticky.

(Evaluation of viscosity)
Viscosity after 1 day of preparation of the cosmetic is rotor number 4 under conditions of 30°C and 12 rpm, and viscosity of the cosmetic after 4 weeks of preparation is rotor number 4 at 0°C, 25°C or 50°C and 12 rpm. was evaluated using a B-type viscometer (TVB-type viscometer TVB-10, manufactured by Toki Sangyo Co., Ltd.).

<Method for producing cosmetics>
Using the formulations shown in Tables 1 to 4, oil-in-water emulsified cosmetics were produced by the following method. Here, the numbers shown below correspond to the numbers on the left indicating the ingredient names of the formulations in Tables 1-4.

(Example 1)
No. A part of the ion-exchanged water of No. 1 is added. 2, No. 3, No. 5 to No. 12, No. 18 ingredients were added and mixed uniformly to obtain a water phase part.

　No. 29 to No. 32, No. 34 to No. 36, No. 38, No. 39, No. 42, No. 43 materials were uniformly mixed to obtain an oil phase part.

　No. No. 1 is added to the remaining ion-exchanged water of No. 1. 21 to No. 23 materials were uniformly mixed to obtain a powder part.

After gradually adding the oil phase part to the water phase part, the powder part was gradually added and uniformly dispersed with a homomixer to obtain an oil-in-water emulsified cosmetic of Example 1.

(Examples 2-7)
Oil-in-water emulsified cosmetics of Examples 2 to 7 were obtained in the same manner as in Example 1, except that the formulations were changed to those shown in Tables 1 and 2.

(Example 8)
No. A part of the ion-exchanged water of No. 1 is added. 2, No. 4, No. 8 to No. 11, No. 14 to No. 18 ingredients were added and mixed uniformly to obtain a water phase part.

　No. 29, No. 31, No. 33 to No. 37, No. 39 to No. 41, No. 43 materials were uniformly mixed to obtain an oil phase part.

　No. No. 1 is added to the remaining ion-exchanged water of No. 1. 19, No. 22, No. 23 materials were uniformly mixed to obtain a powder part.

After gradually adding the oil phase part to the water phase part, the powder part was gradually added and uniformly dispersed with a homomixer to obtain an oil-in-water emulsified cosmetic of Example 8.

(Example 9)
An oil-in-water emulsified cosmetic of Example 9 was obtained in the same manner as in Example 8, except that the formulation was changed to that shown in Table 2.

(Reference example 1)
An oil-in-water emulsified cosmetic of Reference Example 1 was obtained in the same manner as in Example 1, except that no whitening agent or anti-inflammatory agent was used. This cosmetic material was used as a reference example because it was creamy and could not be subjected to a rolling stability test.

(Reference example 2)
An oil-in-water emulsified cosmetic of Reference Example 2 was obtained in the same manner as in Example 2, except that no whitening agent or anti-inflammatory agent was used. In addition, since this cosmetic also exhibited a creamy form and could not be subjected to a rolling stability test, it was used as a reference example.

(Comparative example 1)
An oil-in-water emulsified cosmetic of Comparative Example 1 was obtained in the same manner as in Example 1, except that untreated polymer particles (hydrophobic) were used instead of the pigment-grade hydrophobized particles.

(Comparative example 2)
An oil-in-water emulsified cosmetic of Comparative Example 2 was obtained in the same manner as in Example 1, except that instead of the pigment-grade hydrophobized particles, hydrophobized microparticles having a smaller particle diameter than those particles were used. .

(Comparative Example 3)
An oil-in-water emulsified cosmetic of Comparative Example 3 was obtained in the same manner as in Example 1, except that untreated pigment-grade particles (hydrophilic) were used instead of the pigment-grade hydrophobized particles.

(Comparative Example 4)
No. No. 1 ion-exchanged water, no. 2, No. 3, No. 5 to No. 13, No. 18 ingredients were added and mixed uniformly to obtain a water phase part.

　No. 29 to No. 32, No. 34 to No. 36, No. 38, No. 39, No. 42 to No. 43 materials were uniformly mixed to obtain an oil phase part.

No. for oil phase parts 44 ingredients were gradually added to prepare a mixture. Next, this mixed liquid was gradually added to the water phase part and uniformly dispersed with a homomixer to obtain an oil-in-water emulsified cosmetic of Comparative Example 4.

(Comparative Example 5)
An oil-in-water emulsified cosmetic of Comparative Example 5 was obtained in the same manner as in Comparative Example 3, except that no whitening agent or anti-inflammatory agent was used. This cosmetic material had a creamy morphology and could not be subjected to a rolling stability test.

(Comparative Example 6)
An oil-in-water emulsified cosmetic of Comparative Example 6 was obtained in the same manner as in Comparative Example 4, except that no whitening agent or anti-inflammatory agent was used. This cosmetic also exhibited a cream-like form and could not be subjected to a rolling stability test.

<result>
From the results of Tables 1 to 4, the oil-in-water emulsified cosmetics of Examples 1 to 9 containing pigment-grade hydrophobized particles and a salt-type or acid-type whitening agent and/or anti-inflammatory agent have emulsion stability. And it was confirmed that the tone-up property was excellent.

Further, from the results of Examples 1 and 2 and Examples 3 and 9, it was found that the inclusion of polyether-modified silicone having an HLB of more than 10.0 further improved emulsion stability and tone-up properties. Do you get it.

<<Prescription example of oil-in-water emulsified cosmetic>>
Formulation examples of the oil-in-water emulsified cosmetic composition of the present disclosure are given below, but are not limited to these examples. Here, the numbers shown below correspond to the numbers on the left side of Table 5 indicating the names of the ingredients of the formulations. All of the obtained cosmetics were excellent in emulsion stability and tone-up properties.

<Prescription example 1>
No. A part of the ion-exchanged water of No. 1 is added. 2, No. 17, No. 18, No. 20, No. 21, No. 27-29, No. 31 ingredients were added and uniformly mixed to obtain a water phase part.

　No. 45 to No. 51, No. 62 to No. 67 materials were uniformly mixed to obtain an oil phase part.

　No. No. 1 is added to the remaining ion-exchanged water of No. 1. 39 to No. 41, No. 44 materials were uniformly mixed to obtain a powder part.

After gradually adding the oil phase part to the water phase part, the powder part was gradually added and uniformly dispersed with a homomixer to obtain a creamy oil-in-water emulsified cosmetic of Formulation Example 1.

<Prescription example 2>
Pigment-grade hydrophobized particles were used as No. A creamy oil-in-water emulsified cosmetic of Formulation Example 2 was obtained in the same manner as in Formulation Example 1, except that the particles were changed to No. 42 particles.

<Prescription example 3>
No. A creamy oil-in-water emulsified cosmetic of Formulation Example 3 was obtained in the same manner as Formulation Example 1, except that Material 3 was also added to the water phase part.

<Prescription example 4>
Pigment-grade hydrophobized particles were used as No. A creamy oil-in-water emulsified cosmetic of Formulation Example 4 was obtained in the same manner as in Formulation Example 3, except that the particles were changed to No. 43 particles.

<Prescription example 5>
No. A part of the ion-exchanged water of No. 1 is added. 2 to No. 17, No. 19 to No. 28, No. 30, No. 32 to No. 38 ingredients were added and mixed uniformly to obtain a water phase part.

　No. 52 to No. 61, No. 63 materials were uniformly mixed to obtain an oil phase part.

After gradually adding the oil phase part to the water phase part, the powder part was gradually added and uniformly dispersed with a homomixer to obtain a creamy oil-in-water emulsified cosmetic of Formulation Example 5.

20 Pigment-grade hydrophobized particles 30 Water 40 Oil

Claims

An oil-in-water emulsified cosmetic comprising a dispersion medium containing water and oil droplets dispersed in the dispersion medium,
The dispersion medium contains at least one selected from the group consisting of whitening agents and anti-inflammatory agents, and pigment-grade hydrophobized particles,
The whitening agent contains at least one selected from the group consisting of salt-type whitening agents and acid-type whitening agents,
The anti-inflammatory agent contains at least one selected from the group consisting of salt-type anti-inflammatory agents and acid-type anti-inflammatory agents,
Oil-in-water emulsified cosmetic.
The cosmetic according to claim 1, wherein the oil droplets contain a nonionic surfactant.
The cosmetic according to claim 1 or 2, wherein the oil droplets contain a higher alcohol.
The cosmetic material according to any one of claims 1 to 3, wherein the dispersion medium contains a polyether-modified silicone having an HLB of more than 10.0 and not more than 18.0.
The cosmetic according to claim 4, wherein the mass ratio of said pigment-grade hydrophobized particles to said polyether-modified silicone is 10 or more.
The salt-type whitening agent is ascorbate, tranexamate, glycyrrhizinate, nicotinate, kojicate, ellagate, 1-piperidinepropionate, 3-O-ethyl-L-ascorbate, and alkoxysalicylate, and the acid-type whitening agent is ascorbic acid, tranexamic acid, glycyrrhizic acid, nicotinic acid, kojic acid, ellagic acid, 1-piperidinepropionic acid, 3-O -ethyl-L-ascorbic acid, and at least one selected from the group consisting of alkoxysalicylic acid, cosmetics according to any one of claims 1 to 5.
The cosmetic according to any one of claims 1 to 6, wherein the anti-inflammatory agent is at least one selected from the group consisting of L-ascorbylmagnesium phosphate, dipotassium glycyrrhizinate and ammonium glycyrrhizinate.
At least one selected from the group consisting of the salt-type whitening agent, the acid-type whitening agent, the salt-type anti-inflammatory agent, and the acid-type anti-inflammatory agent, with respect to the total amount of the whitening agent component and the anti-inflammatory agent component, The cosmetic according to any one of claims 1 to 7, containing 50% by mass or more.
The cosmetic material according to any one of claims 1 to 8, wherein the pigment-grade hydrophobized particles have an average particle size of 250 nm or more.
The cosmetic according to any one of claims 1 to 9, wherein the content of the thickener is 1% by mass or less.