JP7152344B2 - Oil-in-water cosmetics - Google Patents

Description

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

Ultraviolet rays are roughly divided into UV-A waves (wavelengths of 320 nm to 400 nm), UV-B waves (wavelengths of 280 nm to 320 nm), and UV-C waves (wavelengths of 190 nm to 280 nm). known to invite

As means for protecting the skin from ultraviolet rays, there are means such as scattering ultraviolet rays and spectroscopic absorption of ultraviolet rays, which are applied singly or in combination as necessary.
As means for scattering ultraviolet rays, use of ultraviolet scattering agents represented by inorganic powders such as titanium oxide and zinc oxide can be mentioned. As a means for spectrally absorbing ultraviolet rays, use of organic ultraviolet absorbers can be mentioned.
Various compositions containing these UV protective ingredients have been proposed, and various cosmetics to which these are applied have been put on the market.

On the other hand, the blending of oily components such as organic UV absorbers and inorganic powders used as UV scattering agents may cause problems such as a decrease in the feeling of use and a decrease in the stability of the composition. Various techniques have been proposed that focus on these problems.

Patent Document 1 discloses a hydrophilic gelling agent composed of a carboxylic acid/carboxylate copolymer, an acrylate homopolymer, an acrylate copolymer and a mixture thereof, a predetermined nonionic surfactant having an HLB value of 14 to 20, a carbon number A skin care composition is disclosed that includes a monohydric alcohol with a weight of 1 to 6, a selected UV protectant, and water in specified amounts.
Patent Document 2 contains an oil-soluble ultraviolet absorber, a dextrin fatty acid ester, and an acrylic acid-based polymer, and contains powder content, a mass ratio of the oil-soluble ultraviolet absorber and the dextrin fatty acid ester, and the oil-soluble ultraviolet absorber and acrylic An oil-in-water type sunscreen cosmetic is disclosed in which the mass ratio to the acid-based polymer is within a predetermined range.

In addition, if the content of the organic ultraviolet absorber is increased for the purpose of improving the ultraviolet absorbability, the feeling of use such as stickiness may be more significantly reduced.
Patent Document 3 discloses an external preparation for skin containing (A) a metal chelating agent, (B) an ultraviolet protective agent, and (C) one or more selected from active oxygen scavengers and antioxidants.
Patent Document 4 discloses an emulsified composition in which an ultraviolet scattering agent, an active oxygen scavenger, and an antioxidant are contained in different phases.

Japanese Patent No. 4167285 International Publication No. 2014/181473A1 JP-A-2000-136569 Japanese Patent Application Laid-Open No. 2009-143900

Cosmetics claiming an ultraviolet shielding effect are required not only to have an ultraviolet shielding effect but also to have a good feel during use. However, if a large amount of an oil-soluble organic UV absorber is blended in order to obtain an ultraviolet shielding effect, the feeling of use tends to deteriorate, such as stickiness. In addition, when a large amount of ultraviolet scattering agents, which are inorganic powders such as titanium oxide and zinc oxide, are added, they tend to cause whitening and squeaky feeling. It was difficult.
As a measure for improving the feeling of use caused by containing a large amount of an organic ultraviolet absorber, a hydrophilic acrylic acid-based polymer is used, for example, as is also used in each composition described in Patent Documents 1 and 2. There is a method to use.

As a recent trend, there is a tendency to prefer cosmetics that provide a fresh feeling when used.

In the external skin preparations and emulsified compositions described in Patent Documents 3 and 4, an ultraviolet protection component and an active oxygen scavenger coexist. In terms of performance, there is still room for improvement. Moreover, in the specific formulations described in Patent Documents 3 and 4, a low-molecular-weight emulsifier is used for emulsification, which can impart a fresh feel to some extent. Furthermore, from the viewpoint of freshness, it is possible to improve freshness by not using a low-molecular-weight emulsifier with high emulsifying power or by reducing the amount of the emulsifier. On the other hand, the use of such means may result in repelling of the composition when applied to the skin.

A problem to be solved by one embodiment of the present disclosure is an oil-in-water cosmetic containing an organic ultraviolet absorber in an amount of 10% by mass or more with respect to the total mass of the oil-in-water cosmetic, and has a fresh feeling in use. and to provide an oil-in-water cosmetic capable of achieving a good SPF (Sun Protection Factor) value in vivo.

The oil-in-water cosmetic of the present disclosure includes the following aspects.
<1> An organic UV absorber with a content of 10% by mass or more relative to the total mass of the oil-in-water cosmetic, 2-acrylamido-2-methylpropanesulfonic acid units, (meth)acrylamide units, (meth) An oil-in-water cosmetic containing a carotenoid and a polymer containing at least one structural unit selected from the group consisting of an acrylic acid unit and a vinylpyrrolidone unit.
<2> The organic ultraviolet absorber is ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, dimethicodiethylbenzalmalonate, t-butylmethoxydibenzoylmethane, homosalate, ethylhexyltriazone, methylenebisbenzotriazolyltetra The oil-in-water cosmetic according to <1>, which is at least one selected from the group consisting of methylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, and hexyl diethylaminohydroxybenzoylbenzoate.
<3> The oil-in-water cosmetic according to <1> or <2>, wherein the carotenoid is at least one selected from astaxanthin and lycopene.
<4> The polymer is a copolymer of dimethylacrylamide and 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, or a copolymer of vinylpyrrolidone and 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof. coalescence, copolymer of hydroxyethyl acrylate and 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, copolymer of vinylpyrrolidone and acrylic acid in which an alkyl group having 10 to 30 carbon atoms is ester-bonded, ( meth) copolymer of acrylic acid or a salt thereof and an alkyl group having 10 to 30 carbon atoms ester-bonded with acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof and an alkyl group having 10 to 30 carbon atoms copolymer modified with (meth)acrylic acid, copolymer of sodium acrylate and 2-acrylamido-2-methylpropanesulfonic acid, and copolymer of acrylamide and (meth)acrylic acid or a salt thereof The oil-in-water cosmetic according to any one of <1> to <3>, which is at least one selected from the group consisting of.
<5> Any one of <1> to <4>, wherein the content of the polymer is 0.05% by mass or more and less than 1% by mass with respect to the total mass of the oil-in-water cosmetic. oil-in-water cosmetic.

<6> The content of the organic ultraviolet absorber that absorbs UV-A waves with a wavelength of 320 nm to 400 nm is 4% by mass or more with respect to the total mass of the oil-in-water cosmetic, <1> to <5> The oil-in-water cosmetic according to any one of items 5>.
<7> The oil-in-water cosmetic according to any one of <1> to <6>, further comprising at least one selected from tocopherol and dibutylhydroxytoluene.
<8> The oil-in-water cosmetic according to <7>, wherein the total content of the tocopherol and dibutylhydroxytoluene is 0.01% by mass or less with respect to the total mass of the oil-in-water cosmetic.

<9> The oil-in-water cosmetic according to any one of <1> to <8>, further comprising at least one selected from the group consisting of inorganic powders.
<10> The oil-in-water cosmetic according to <9>, wherein the total content of the inorganic powder is 3% by mass or less with respect to the total mass of the oil-in-water cosmetic.
<11> The oil-in-water cosmetic according to any one of <1> to <10>, further comprising a lower alcohol having 1 to 3 carbon atoms.
<12> The oil-in-water cosmetic according to any one of <1> to <11>, which is a sunscreen cosmetic.

According to one embodiment of the present disclosure, an oil-in-water cosmetic containing an organic ultraviolet absorber in an amount of 10% by mass or more with respect to the total mass of the oil-in-water cosmetic has a fresh feeling of use, and in It is possible to provide an oil-in-water cosmetic that can achieve a good SPF value in vivo.

An example of an embodiment of the oil-in-water cosmetic of the present disclosure will be described below. However, the oil-in-water cosmetic of the present disclosure is not limited to the following embodiments.

In the present disclosure, a numerical range indicated using "to" means a range including the numerical values before and after "to" as the minimum and maximum values, respectively.
In the numerical ranges described step by step in the present disclosure, upper or lower limits described in a certain numerical range may be replaced with upper or lower limits of other numerical ranges described step by step. In addition, in the numerical ranges described in the present disclosure, upper or lower limits described in a certain numerical range may be replaced with values shown in Examples.
In the present disclosure, the amount of each component in the cosmetic is the total amount of the multiple types of substances present in the cosmetic unless otherwise specified when multiple types of substances corresponding to each component are present in the cosmetic. means
In the present disclosure, a combination of two or more preferred aspects is a more preferred aspect.
In the present disclosure, the “oil phase” means a dispersed phase in an oil-in-water dosage form, and includes an oil phase liquid medium and components dispersed or dissolved in the liquid medium.
In the present disclosure, the “aqueous phase” means the continuous phase in an oil-in-water dosage form, and includes the liquid medium of the dispersed phase and components dispersed or dissolved in the liquid medium.

In the present disclosure, the hydrophile-lipophile balance value is sometimes abbreviated as HLB (Hydrophile-Lipophile Balance) value.
In the present disclosure, "(meth) acrylic acid" is a concept that includes both acrylic acid and methacrylic acid, "(meth) acrylate" is a concept that includes both acrylate and methacrylate, and "(meth) ) acrylamide” is a concept that includes both acrylamide and methacrylamide.

In the present disclosure, the term “fresh feeling” means a feeling of use in which water seeps out when the cosmetic is applied to the skin.
The UV protection ability of cosmetics is evaluated by Sun Protection Factor (SPF) measured in vivo and UV absorption measured in vitro (in a test tube, ie, outside the body). The oil-in-water cosmetic of the present disclosure focuses on the SPF value in vivo.
The SPF value is an index showing the function of preventing inflammation of the skin against UV-B waves with a wavelength of 280 nm to 320 nm among ultraviolet rays. The in vivo SPF value is based on the Japanese Cosmetic Industry SPF Measurement Standard <2007 Revised Edition> established in 2007 in accordance with ISO24444, an international standard of the International Organization for Standardization (ISO), as described later. can do.

<Oil-in-water cosmetics>
The oil-in-water cosmetic according to the present disclosure (hereinafter also simply referred to as "cosmetics") is an organic ultraviolet absorber (hereinafter referred to as "A Also referred to as "component".) and at least one configuration selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid units, (meth)acrylamide units, (meth)acrylic acid units, and vinylpyrrolidone units. It contains a polymer containing units (hereinafter also referred to as "specific polymer" or "B component") and a carotenoid (hereinafter also referred to as "C component").

The cosmetic according to the present disclosure contains an organic ultraviolet absorber having a content of 10% by mass or more with respect to the total weight of the oil-in-water cosmetic, a specific polymer, and a carotenoid, so that the organic ultraviolet absorber in a high concentration of 10% by mass or more, the cosmetic can be excellent in both fresh feeling and UV protection, especially SPF value related to the living body.

Although the reason why the cosmetic according to the present disclosure exhibits the above-described excellent effects is not clear, the present inventors speculate as follows.
The cosmetic according to the present disclosure contains an organic UV absorber (component A) having a content of 10% by mass or more with respect to the total mass of the oil-in-water cosmetic, so that it has a good UV protection ability, and is emulsified. A good SPF value is achieved by containing a specific polymer (B component), which is a hydrophilic acrylic acid polymer with strong antioxidant properties, and a carotenoid (C component), which has excellent antioxidant ability, and a fresh It is assumed that a feeling of use can be obtained.

Hereinafter, each component contained in the oil-in-water cosmetic according to the present disclosure will be described in detail.

[A: Organic UV absorber]
The cosmetic according to the present disclosure contains an organic UV absorber (component A) having a content of 10% by mass or more relative to the total mass of the oil-in-water cosmetic.
The organic ultraviolet absorber is not limited as long as it is an organic compound having an action of absorbing ultraviolet rays, and various organic ultraviolet absorbers can be used.
The form at room temperature (25° C.) of the organic ultraviolet absorber may be solid, semi-solid, or liquid.

Among the organic ultraviolet absorbers, compounds having the ability to absorb UV-A waves (wavelengths of 320 nm to 400 nm) are referred to as UV-A agents, and compounds having the ability to absorb UV-B waves (wavelengths of 280 nm to 320 nm) are referred to as UV- It may be called B agent.
Some organic ultraviolet absorbents absorb both UV-A waves and UV-B waves, and these may be used.
Good SPF values can be achieved by incorporating UVB absorbers. Since many UVB absorbents are liquid components, the addition of UVB absorbents does not impose any restrictions on the feeling of use when imparting freshness to cosmetics. On the other hand, in recent years, it has been clarified that UVA waves reach the dermis and cause aging such as wrinkles and sagging. For this reason, it is necessary to prevent UVA waves, but UVA absorbers contain many powder components and highly crystalline components, and when UVA absorbers are blended in cosmetics, they may cause powdery. In addition, a large amount of oil is required for dissolution, which may hinder the freshness of cosmetics.
Preferably, the UV-A agent is an ultraviolet absorber having maximum absorption in UV-A waves (wavelength 320 nm to 400 nm), and the UV-A agent has maximum absorption in UV-B waves (wavelength 280 nm to 320 nm). It is an ultraviolet absorber with

The cosmetic according to the present disclosure may contain only one type of organic UV absorber, or may contain two or more types.

The cosmetic according to the present disclosure preferably uses two or more organic UV absorbers in combination for absorption of UV-A waves (wavelength 320 nm to 400 nm) and UV-B waves (wavelength 280 nm to 320 nm).

A preferred combination of the organic ultraviolet absorbers includes one or more organic ultraviolet absorbers (hereinafter also referred to as UV-A agents) having absorption at the wavelength of UV-A waves and having absorption at the wavelength of UV-B waves. A combination of one or more kinds of organic ultraviolet absorbers (hereinafter also referred to as UV-B agents) may be mentioned.

Examples of the organic ultraviolet absorber include organic ultraviolet absorbers described in various known documents. For example, the group of compounds listed in paragraphs 0015 to 0036 of JP-A-2017-521463, the group of compounds described in paragraphs 0018 and 0021 of Japanese Patent No. 6359947 are the organic UV-absorbing ingredients contained in the cosmetic according to the present disclosure. It can be used as an agent.

Examples of organic UV absorbers include triazine compounds, benzoic acid compounds, anthranilic acid compounds, salicylic acid compounds, cinnamic acid compounds, benzotriazole compounds, dibenzoylmethane compounds, benzophenone compounds, benzimidazole compounds, benzoylpiperazine compounds, and dibenzoylmethane compounds. , benzoxazole compounds, phenylacrylate compounds, imidazoline compounds, camphor compounds, benzalmalonate compounds, and the like, but are not limited thereto.

Among these, at least one organic ultraviolet ray selected from triazine compounds, cinnamic acid compounds, benzotriazole compounds, dibenzoylmethane compounds, benzophenone compounds, benzoic acid compounds, phenylacrylate compounds, salicylic acid compounds and benzalmalonate compounds. Absorbents are preferred.

In the oil-in-water cosmetic of the present disclosure, the organic UV absorber is preferably contained in at least the oil phase, but may be contained in either the oil phase or the water phase depending on the type. From the viewpoint of improving the ultraviolet shielding ability, it is also preferable to contain it in both the oil phase and the water phase.

As an organic ultraviolet absorber, specifically, the effect according to the present disclosure can be better exhibited, and both ultraviolet UV-A (wavelength 320 nm to 400 nm) and ultraviolet UV-B (wavelength 280 to 300 nm) can be efficiently absorbed. Ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene (a.k.a. (RS)-2-cyano-3,3-diphenylprop-2-enoic acid 2-ethylhexyl ester), since they can be combined for good absorption, Dimethicodiethylbenzalmalonate (also known as Polysilicone-15), t-butylmethoxydibenzoylmethane, homosalate, ethylhexyltriazone, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, and diethylamino At least one selected from hexyl hydroxybenzoylbenzoate is preferred.

Examples of the UV-A agents in the above organic ultraviolet absorbers include the compounds shown below.
For example, t-butylmethoxydibenzoylmethane, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, and hexyl diethylaminohydroxybenzoylbenzoate.

Further, examples of the UV-B agent include the compounds shown below.
For example, ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene (alias: (RS)-2-cyano-3,3-diphenylprop-2-enoic acid 2-ethylhexyl ester), dimethicodiethylbenzalmalonate (alias : polysilicone-15), homosalate, ethylhexyl triazone and the like.

Among these
a combination of ethylhexyl methoxycinnamate, bisethylhexyloxyphenol methoxyphenyltriazine, hexyl diethylaminohydroxybenzoylbenzoate, and methylenebisbenzotriazolyltetramethylbutylphenol;
a combination of ethylhexyl methoxycinnamate, bisethylhexyloxyphenol methoxyphenyltriazine, dimethicodiethylbenzalmalonate, hexyl diethylaminohydroxybenzoylbenzoate, and methylenebisbenzotriazolyltetramethylbutylphenol;
a combination of ethylhexyl methoxycinnamate, bisethylhexyloxyphenol methoxyphenyltriazine, hexyl diethylaminohydroxybenzoylbenzoate, methylenebisbenzotriazolyltetramethylbutylphenol, ethylhexyltriazone and t-butylmethoxydibenzoylmethane, and
A combination of ethylhexyl methoxycinnamate, bisethylhexyloxyphenol methoxyphenyltriazine, dimethicodiethylbenzalmalonate, hexyl diethylaminohydroxybenzoylbenzoate, ethylhexyltriazone, and methylenebisbenzotriazolyltetramethylbutylphenol
Examples of suitable combinations of organic ultraviolet absorbers include:
However, it goes without saying that the combination of organic UV absorbers in the present disclosure is not limited to the above combinations.

A synthetic product may be sufficient as an organic ultraviolet absorber, and a commercial item may be used.
Examples of commercially available products include Tinosorb (registered trademark) M, Tinosorb (registered trademark) S, Uvinal (registered trademark) A Plus Glanular, Uvinal (registered trademark) MC-80N, and Uvinal (registered trademark) T-150 (above, BASF Japan Co., Ltd.), Eusolex 9020, Eusolex OCR (above, Merck Co., Ltd.), Parsol SLX (DSM Nutrition Japan Co., Ltd.), HXMT-100ZA, HXLT-01 (above, Tayca Corporation), and the like.

Among the organic ultraviolet absorbers, the content of the organic ultraviolet absorber (hereinafter sometimes referred to as UV-A agent) that absorbs UV-A waves with a wavelength of 320 nm to 400 nm is based on the total mass of the cosmetic. , is preferably 4% by mass or more, more preferably 5% by mass or more, and even more preferably 7% by mass or more.
Although there is no particular upper limit for the content of the UV-A agent relative to the total weight of the cosmetic, it may be 20% by weight or less from the viewpoint of making it easier to obtain a fresh feel.

The content of the organic UV absorber may be determined according to the type of organic UV absorber to be used, the UV absorption effect set for the cosmetic, and the like. For example, the content of the organic ultraviolet absorber is 10% by mass or more, more preferably 12% by mass or more, and more preferably 15% by mass or more, relative to the total mass of the cosmetic, from the viewpoint of exhibiting an ultraviolet protection effect. .
The upper limit of the content of the organic ultraviolet absorber may be determined by the upper limit of the content of each organic ultraviolet absorber in cosmetics, but from the viewpoint of the feeling of use, it is preferably 30% by mass or less, and 20% by mass. % or less is more preferable.
In the cosmetic of the present disclosure, even when the content of the organic ultraviolet absorber is as high as 10% by mass or more with respect to the total mass of the cosmetic, a fresh feel is obtained.

<Other UV protection ingredients>
The cosmetic according to the present disclosure may further contain, in addition to the organic UV absorber (ingredient A), an UV protection component capable of protecting against UV rays.
Other UV protection components include, for example, inorganic powders that function as UV scattering agents.
The cosmetic of the present disclosure may further contain at least one selected from the group consisting of inorganic powders.
When the cosmetic of the present disclosure contains inorganic powder, the content of at least one selected from the group consisting of inorganic powder is 3% by mass or less with respect to the total mass of the cosmetic from the viewpoint of feeling during use. is preferably

Examples of inorganic powders include ultraviolet-absorbing inorganic powders such as titanium oxide and zinc oxide.
The surface of the inorganic powder may or may not be coated, as long as it can be stably dispersed in the cosmetic.
The coating agent for coating the inorganic powder may be either inorganic or organic, and may be appropriately selected according to the cosmetic system to which the inorganic powder is added.

[B: Specific polymer]
The cosmetic according to the present disclosure contains at least one structural unit selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid units, (meth)acrylamide units, (meth)acrylic acid units and vinylpyrrolidone units. contains a polymer (component B: specific polymer) containing
In the following, 2-acrylamido-2-methylpropanesulfonic acid units, (meth)acrylamide units, (meth)acrylic acid units and vinylpyrrolidone units may be collectively referred to as "specific units".
The specific polymer is one aspect of a hydrophilic acrylic polymer that can function as a gelling agent.

Each unit included in the specific unit in the specific polymer is selected from 2-acrylamido-2-methylpropanesulfonic acid or salts thereof, (meth)acrylamide, (meth)acrylic acid or salts thereof, and vinylpyrrolidone It means a structural unit formed by using a monomer or a derivative of these monomers as one of raw material monomers.
The specific unit may have a salt structure, and examples of the salt structure include alkali metal salts, ammonium salts, and the like.
Derivatives of the above monomers mean those obtained by modifying a part of the structure of each of the above monomers while retaining the basic skeleton thereof. Examples of derivatives include alkyl modified products, esterified products, and the like.

The specific polymer may be a homopolymer or a copolymer.

The specific polymer may contain one or more structural units other than the specific unit.
Examples of other structural units include monovalent unsaturated fatty acids having 10 to 30 carbon atoms such as eicosene, which can be appropriately selected depending on the desired properties of the specific polymer.

As the specific polymer, dimethylacrylamide and 2-acrylamido-2-methylpropanesulfonic acid are copolymers of their salts, vinylpyrrolidone and 2-acrylamido-2-methylpropanesulfonic acid or their copolymers of hydroxyethyl acrylate and 2-acrylamido-2-methylpropanesulfonic acid or salts thereof; copolymers of vinylpyrrolidone and acrylic acid in which alkyl groups having 10 to 30 carbon atoms are ester-bonded; Copolymers, copolymers of (meth)acrylic acid or its salts and acrylic acid in which alkyl groups having 10 to 30 carbon atoms are ester-bonded, 2-acrylamido-2-methylpropanesulfonic acid or its salts and 10 carbon atoms Copolymers of (meth)acrylic acid modified with ∼30 alkyl groups, copolymers of sodium acrylate and 2-acrylamido-2-methylpropanesulfonic acid, and acrylamide and (meth)acrylic acid or salts thereof It is preferably at least one selected from copolymers with.

Incidentally, the ammonium salt of the copolymer of vinylpyrrolidone and 2-acrylamido-2-methylpropanesulfonic acid is also called (ammonium acryloyldimethyltaurate/VP) copolymer.
The sodium salt of a copolymer of hydroxyethyl acrylate and 2-acrylamido-2-methylpropanesulfonic acid is also referred to as (hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer.

The cosmetic according to the present disclosure may contain only one type of specific polymer, or may contain two or more types.

The specific polymer may be a synthetic product or a commercially available product.
Examples of commercial products of specific polymers include Syntaren K and L (carboxyvinyl polymer, Fujifilm Wako Pure Chemical Industries, Ltd.), Aristoflex AVC ((acryloyldimethyltaurate ammonium/VP) copolymer Clariant Japan), and Aristoflex HMB. ((Ammonium acryloyldimethyltaurate/beheneth-25 methacrylate) crosspolymer Clariant Japan), PEMULEN TR-1, TR-2 (Acrylates/alkyl acrylate (C10-30)) crosspolymer, Lubrizol), SIMULGEL FL, SIMULGEL NS, SEPIPLUS S, and SEPINOV EMT 10 (hydroxyethyl acrylate/sodium acryloyldimethyltaurate) copolymer, SEPPIC), SEPIPLUS 265 (acrylamide/ammonium acrylate) copolymer, SEPPIC), and the like.

The content of the specific polymer in the cosmetic according to the present disclosure is preferably 0.005% by mass or more and less than 1% by mass with respect to the total mass of the cosmetic, from the viewpoint of a fresh feeling in use, and 0.1 % to 0.8% by mass is more preferred, and 0.2% to 0.5% by mass is even more preferred.

[C: carotenoid]
The cosmetic according to the present disclosure contains carotenoid (component C).
Carotenoids are yellow to red terpenoid pigments and include pigments from plants, algae, and bacteria.
Carotenoids are not limited to those derived from nature, and carotenoids obtained by conventional methods may be used. For example, many of the carotenoid carotenes described below are also produced synthetically, and most of commercially available β-carotene is produced synthetically.
Carotenoids function as oily active ingredients.

Examples of carotenoids include carotenes, which are hydrocarbons, and oxidized alcohol derivatives of carotenes (eg, xanthophylls).
Carotenoids include actinioerythrol, astaxanthin, bixin, canthaxanthin, capsanthin, capsorubin, β-8′-apo-carotenal (apocarotenal), β-12′-apo-carotenal, α-carotene, β-carotene, γ -carotene, β-cryptoxanthin, lutein, lycopene, viorellithrin, zeaxanthin, and esters of those containing hydroxyl or carboxyl. As a common name, a mixture of α-carotene and β-carotene is sometimes referred to as "carotene".

Particularly preferably used carotenoids include astaxanthin, which is known as a coloring agent exhibiting a color ranging from yellow to red, which has antioxidant effect, anti-inflammatory effect, anti-aging effect, whitening effect, etc., and lycopene. species or more.
In the present disclosure, “astaxanthin” is used in the sense of including derivatives such as esters of astaxanthin chitin.

A commercially available carotenoid may be used. Commercially available products include ASTOTS series such as ASTOTS-S, ASTOTS-SS, ASTOTS-10OS, and ASTOTS-5OS (Fujifilm Healthcare Laboratory Co., Ltd.), Lycomart (Lyc-o-Mato: trade name, manufactured by LYCORED). etc.

The cosmetic of the present disclosure may contain only one type of carotenoid, or may contain two or more types.
The content of carotenoids in the cosmetic according to the present disclosure is 0.00001% by mass to 1% by mass with respect to the total mass of the cosmetic, from the viewpoint of providing a fresh feel and a better SPF value. It is preferably 0.00005% by mass to 0.5% by mass, and even more preferably 0.0001% by mass to 0.1% by mass.

[D: at least one selected from tocopherol and dibutylhydroxytoluene]
The cosmetic of the present disclosure may contain at least one selected from tocopherol and dibutylhydroxytoluene (hereinafter also referred to as BHT) (hereinafter also referred to as "component D").
Both tocopherol and BHT are antioxidant components, improve the antioxidant effect on the skin, and contribute to the stabilization of carotenoids, and thus are preferably contained. Tocopherol is the ingredient known as vitamin E.
When the cosmetic of the present disclosure contains at least one of tocopherol and BHT, the total content of tocopherol and BHT with respect to the total mass of the cosmetic is preferably 0.01% by mass or more, and 0.05% by mass. It is more preferably 0.080% by mass or more, and even more preferably 0.080% by mass or more.
The upper limit of the content of at least one of tocopherol and BHT in the cosmetic is not particularly limited, but it can be 1.5% by mass or less with respect to the total mass of the cosmetic.

[E: lower alcohol having 1 to 3 carbon atoms]
The cosmetic according to the present disclosure may further contain a lower alcohol having 1 to 3 carbon atoms (hereinafter also referred to as "ingredient E"). The cosmetic according to the present disclosure further improves freshness by containing the E component.

Lower alcohols having 1 to 3 carbon atoms may be used alone or in combination of two or more.
The lower alcohol having 1 to 3 carbon atoms is preferably a monohydric alcohol having 1 to 3 carbon atoms, preferably at least one selected from ethanol and isopropanol, more preferably ethanol.

When the cosmetic according to the present disclosure contains a lower alcohol having 1 to 3 carbon atoms, the content of the lower alcohol having 1 to 3 carbon atoms is the content of the lower alcohol having 1 to 3 carbon atoms, from the viewpoint of further improving the freshness of the oil-in-water cosmetic. It is preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 2% by mass or more, relative to the total mass.
Although the upper limit of the content of the lower alcohol having 1 to 3 carbon atoms is not particularly limited, it can be 10% by mass or less from the viewpoint of cosmetic stability.

[Oil agent]
The oil-in-water emulsion composition of the present disclosure preferably contains an oil agent.
In addition, C component and D component are not included in the oil agent in this indication.

Examples of oils include silicone oils (e.g., dimethicone, cyclopentasiloxane, etc.), hydrocarbon oils (e.g., liquid paraffin, petrolatum, paraffin wax, squalane, beeswax, carnauba wax, etc.), olive oil, lanolin, fatty acids, higher fatty acids, Ester oil (e.g., octyldodecyl myristate, ethylhexyl palmitate, isononyl isononanoate, tri(caprylic/capric)glyceryl, etc.), ceresin, microcrystalline wax, candelilla wax, diglyceride, triglyceride, jojoba oil, neopentyl dioctanoate Oils commonly used in cosmetics, such as glycols, can be mentioned.

Only one type of oil may be used, or two or more types may be used.
The total content of the oil agent is preferably 2% by mass to 40% by mass, more preferably 3% by mass to 30% by mass, and even more preferably 5% by mass to 20% by mass, relative to the total mass of the oil-in-water cosmetic. .

〔water〕
The cosmetic according to the present disclosure is an oil-in-water cosmetic and contains water.
Water is not particularly limited, and natural water, purified water, distilled water, ion-exchanged water, pure water, ultrapure water (Milli-Q water, etc.) and the like can be used. Note that Milli-Q water is ultrapure water obtained by a Milli-Q water production apparatus of Merck Millipore, Merck Co., Ltd.
As water, purified water, distilled water, ion-exchanged water, pure water, or ultrapure water is preferable from the viewpoint of containing few impurities.
The content of water in the cosmetic is not particularly limited, but is preferably 30% to 99% by mass, more preferably 40% to 90% by mass, based on the total mass of the cosmetic, from the viewpoint of feeling during use. % by mass is more preferred, and 50% by mass to 80% by mass is preferred.

[Other ingredients]
The cosmetic according to the present disclosure may contain other components, if necessary, in addition to the other components described above, as long as the effects of the present disclosure are not impaired.
Other components include, for example, additives commonly used in cosmetics.

Specific examples of other ingredients include functional ingredients that exhibit useful beauty effects (eg, moisturizing effect, whitening effect, skin conditioning effect, etc.) when used in cosmetics. Examples of such functional ingredients include emollient agents such as triisodecyl isononanoate; vitamins other than the aforementioned tocopherols, including vitamin E such as tocotrienol; ubiquinones such as coenzyme Q10; polysaccharides such as hyaluronic acid; Active ceramides such as ceramide 1, ceramide 2, ceramide 3, ceramide 5 and ceramide 6; glycosphingolipids such as glucosylceramide and galactosylceramide; collagen such as hydrolyzed collagen and water-soluble collagen; amino acids such as acetylhydroxyproline and hydrolysis silobanalpin protein and the like.
In addition to the above, for example, agents commonly used in cosmetics such as herbal medicines, antiphlogistic agents, bactericides, and antibacterial agents, surfactants, emulsifiers, emulsion stabilizers, preservatives such as phenoxyethanol, antioxidants, coloring agents, Hydrophilic thickeners such as xanthan gum and carbomer, pH adjusters, buffers, fragrances, inorganic salts or organic acid salts, chelating agents such as EDTA-2Na (ethylenediaminetetraacetic acid-2 sodium salt), organic solvents other than component E etc. are also included as other components.

[Form of cosmetics]
The form of the cosmetic according to the present disclosure is an oil-in-water type, contains A component, B component and C component, and is not particularly limited as long as the content of A component is within the range specified in the present disclosure, It may be appropriately selected depending on the application.
Forms that the cosmetic of the present disclosure can take include, for example, liquid, gel, and cream forms.

Applications of the cosmetics of the invention according to the present disclosure include skin care cosmetics such as lotions, serums, milky lotions, and creams, sunscreen cosmetics, makeup cosmetics, deodorant cosmetics, scalp and hair cosmetics, and the like. can be, but are not limited to:

[Container]
The cosmetics according to the present disclosure can be stored in various storage containers applicable to cosmetics. There is no restriction on the storage container, and for example, various storage containers made of glass or resin can be used.

[Method for producing oil-in-water cosmetic]
The cosmetic according to the present disclosure is obtained by preparing an oil phase composition and an aqueous phase composition using the above-described A component, B component, and C component, and optionally contained optional components. It can be produced by a production method including mixing the oil phase composition and the aqueous phase composition and emulsifying by a conventional method.

Component A (organic ultraviolet absorber) may be contained in either the oil phase composition or the water phase composition depending on the type, but is preferably contained at least in the oil phase composition.
The B component (specific polymer) and optional E component can be contained in the aqueous phase composition.
The C component (carotenoid) and optional D component can be contained in the oil phase composition.
Also, at least the aqueous phase composition comprises water.

There is no particular limitation on the method of preparing the cosmetic by combining the oil phase composition and the aqueous phase composition, and the method can be carried out according to a conventional method.

The ratio of the oil phase composition and the aqueous phase composition when preparing the oil-in-water emulsion is not particularly limited, and the mass ratio of the oil phase/aqueous phase is, for example, from 0.1/99.9 to 50/50 is preferred, 0.5/99.5 to 40/60 is more preferred, and 1/99 to 30/70 is even more preferred.

The cosmetic of the present disclosure is suitable as a sunscreen cosmetic because it contains a large amount of organic ultraviolet absorbers, yet gives a fresh feel and has a good in vivo SPF value.

Hereinafter, the cosmetic according to the present disclosure will be described more specifically with reference to examples. However, the cosmetics according to the present disclosure are not limited to the following examples as long as they do not exceed the gist thereof.

[Examples 1 to 10, Comparative Examples 1 to 3]
[Preparation of oil-in-water cosmetic]
Oil-in-water cosmetics of Examples 1 to 10 and Comparative Examples 1 to 3 were prepared by the method shown below. All of the prepared oil-in-water cosmetics are creams.
In addition, the numerical value of each component shown in the prescription column in each table indicates "% by mass".

An oil phase composition was prepared by mixing an organic ultraviolet absorber (component A), a carotenoid (component C), a component D, and an oil shown in the oil phase column of Tables 1 to 3 to prepare an oil phase composition. The mass was heated to 80°C.
Each component described in the water phase column of Tables 1 to 3 was mixed to prepare a water phase composition, and the obtained water phase composition was heated to 80°C.
The oil phase composition is mixed with the water phase composition, and while maintaining the temperature at 80 ° C., using a homomixer, the number of revolutions: 3500 rpm (revolutions per minute) for 15 minutes, applying shear force and stirring. to obtain an emulsion. The obtained emulsion was cooled to 30° C. to obtain an oil-in-water cosmetic (cream).

[evaluation]
The obtained oil-in-water cosmetics (creams) of Examples and Comparative Examples were evaluated as follows. The results are shown in Tables 1-3.

(1. Feeling of use (evaluation of freshness))
The freshness of each cosmetic of Examples and Comparative Examples was evaluated as follows.
Each of the obtained creams was applied to the face by 10 panelists specializing in cosmetic evaluation, and the freshness felt after application was evaluated based on the following evaluation criteria. The table describes the average value of evaluations by 10 expert panelists.
An average evaluation rank of 4 or more is acceptable for practical use, and an average of 4.5 or more is more preferable.
-Evaluation criteria-
5: Feels very fresh after application.
4: Freshness is felt after application.
3: Freshness is slightly felt after application.
2: Almost no feeling of freshness after application.
1: No feeling of freshness after application.

(2. in vivo SPF test (SPF value))
The in vivo SPF value was measured based on the Japanese Cosmetic Industry SPF Measurement Standard <2007 Revised Edition> established in 2007 in accordance with ISO24444, an international standard of the International Organization for Standardization (ISO).
Specifically, it was measured indoors using a xenon arc solar simulator, which is a device for irradiating ultraviolet light of a predetermined wavelength, as a light source.
The human back was provided with a site on which nothing was applied and a site on which a cosmetic (2 mg/cm ² ) was applied, and was irradiated with ultraviolet rays. The minimum ultraviolet dose (Minimal Erythma Dose MED) that causes severe erythema was determined. Measure the MED (MEDu) of the site without or without application of each subject and the MED (MEDp) of the site to which the cosmetic was applied, and set the ratio (MEDp / MEDu) to SPFi, and the SPFi of all subjects The average value was taken as the SPF value.
The SPF value is preferably 50 or more, more preferably 60 or more.

(3. Ultraviolet shielding ability evaluation)
For each cosmetic of Examples and Comparative Examples, the transmittance to ultraviolet rays (UV-A) and (UV-B) was measured as follows to evaluate the ultraviolet shielding ability.

Based on the in vitro measurement method of ISO24443, 32.5 mg of each of the obtained cosmetics was weighed out as a test sample, uniformly applied to a PMMA plate (HELIOPLATE HD6) at a coating amount of 2 mg/cm ² , and a sample for measurement was obtained. made. Two samples for each measurement were produced.

(3-1. Evaluation of UV-A blocking ability)
For the measurement sample, using an SPF analyzer (Labsphere, UV-2000S: trade name), the ultraviolet transmittance is measured with a designated wavelength of 320 nm to 400 nm, and the average value of the transmittance of the wavelengths in the above range is shown. It was used as an index of UV-A shielding ability.
The transmittance values were measured at five different locations (n=5) for the two samples, and the arithmetic average value of the measured values at the 10 locations was taken as the transmittance, and evaluated according to the following evaluation criteria.
The smaller the transmittance value, the lower the light transmittance at the measurement wavelength, and the better the UV-A ultraviolet shielding ability.
The UV-A ultraviolet blocking ability was evaluated according to the following evaluation criteria. Ranks "3", "4" and "5" for UV-A ultraviolet rays are practically acceptable levels, and "4" and "5" are more preferable.
-Evaluation criteria-
5: Transmittance at designated wavelength is less than 10% 4: Transmittance at designated wavelength is 10% or more and less than 20% 3: Transmittance at designated wavelength is 20% or more and less than 50% 2: Transmittance at designated wavelength is 50% or more Less than 80% 1: Transmittance at specified wavelength is 80% or more

(3-2. Evaluation of UV-B blocking ability)
For the measurement sample, using an SPF analyzer (Labsphere, UV-2000S: trade name), the ultraviolet transmittance is measured with a wavelength of 280 nm to 320 nm as the designated wavelength, and the average value of the transmittance of the wavelength in the above range is shown. It was used as an index of UV-B shielding ability.
The transmittance values were measured at five different locations (n=5) for the two samples, and the arithmetic average value of the measured values at the 10 locations was taken as the transmittance, and evaluated according to the following evaluation criteria.
The smaller the transmittance value, the lower the light transmittance at the measurement wavelength, and the better the UV-B ultraviolet shielding ability.
The UV-B ultraviolet blocking ability was evaluated according to the following evaluation criteria. For UV-B ultraviolet rays, ranks "3", "4" and "5" in the following evaluation criteria are practically acceptable levels, and "4" and "5" are more preferable.
-Evaluation criteria-
5: Transmittance at designated wavelength is less than 1% 4: Transmittance at designated wavelength is 1% or more and less than 3% 3: Transmittance at designated wavelength is 3% or more and less than 10% 2: Transmittance at designated wavelength is 10% or more Less than 30% 1: Transmittance at specified wavelength is 30% or more

(4. Emulsion stability)
The emulsification stability of each cosmetic of Examples and Comparative Examples was evaluated as follows.
Each cosmetic of Examples and Comparative Examples was sealed in a glass container.
It was stored in a constant temperature room at 40° C. for 30 days, and the appearance of the cosmetic during storage was observed and evaluated according to the following criteria.
If the evaluation rank is "A", it is practically acceptable.
-Evaluation criteria-
A: Even after 30 days of storage, no change in appearance was observed by visual observation.
B: During 7 days to 29 days of storage, separation due to defrosting was observed by visual observation.
C: Separation due to demulsification was observed by visual observation within 6 days of storage.

In Tables 1 to 3, a blank in the composition column means that the corresponding component was not blended.

Details of each component in Tables 1 to 3 are as follows.
<A component>
- Ethylhexyl methoxycinnamate (trade name: Ubinal (registered trademark) MC-80N, BASF)
・ Ethylhexyl Triazone (trade name: Ubinal (registered trademark) T-150 BASF)
・Bisethylhexyloxyphenol methoxyphenyltriazine (trade name: Tinosorb S, BASF)
- Hexyl diethylaminohydroxybenzoylbenzoate (trade name: Ubinal (registered trademark) A Plus Glanular, BASF)
・Methylenebisbenzotriazolyltetramethylbutylphenol (trade name: Tinosorb M, BASF)
・Dimethicodiethylbenzalmalonate (Polysilicone-15, Parsol SLX DSM Nutrition Japan Co., Ltd.)
<B component>
・(Ammonium acryloyldimethyltaurate/VP) copolymer (trade name: Aristoflex AVC)
・(Acrylates/C10-30 alkyl acrylate) crosspolymer (trade name: PEMULEN TR-2, Lubrizol)
・(Acrylamide/Na acryloyldimethyltaurate) copolymer ・(Eicosene/vinylpyrrolidone) copolymer ・(Na acrylate/Na acryloyldimethyltaurate) copolymer (trade name: SEPINOV EMT 10)
・Sodium acrylate/sodium acryloyldimethyltaurate copolymer/isohexadecane/polysorbate 80

<C component>
・Astaxanthin (trade name: Asstats-S (20% astaxanthin), Fujifilm Healthcare Laboratory Co., Ltd.)
・Lycopene (trade name: Lycomart (6% lycopene), manufactured by LYCORED)
<D component>
・Tocopherol ・BHT (dibutylhydroxytoluene)
<E component>
・Ethanol (reagent special grade, FUJIFILM Wako Pure Chemical Industries, Ltd.)
<Oil solution>
・Isononyl isononanoate (trade name: Salacos 99, Nisshin OilliO Co., Ltd.)
・ Dimethicone (trade name: KF-96A-5cs, manufactured by Shin-Etsu Silicone Co., Ltd.)
<Emulsifier>
・ Polyglyceryl-10 myristate (HLB = 15.7, product name: Sunsoft Q-14S-C) NIKKOL Decaglyn 1-M, Taiyo Kagaku Co., Ltd.)
Higher alcohol alkyl glucoside (mixture of alkyl (C12-20) glucoside and C14-22 higher alcohol, Montanobu L: trade name, SEPPIC)
<Thickener>
・Carbomer (Carbopol 981, Lubrizol)
<Additional ingredients>
・Preservatives (phenoxyethanol, ethylhexylglycerin)

As shown in Tables 1 to 3, the cosmetics of Examples 1 to 10 all contained a large amount of the organic ultraviolet absorber, had an SPF value of 50 or more, and had an excellent ultraviolet shielding effect. , it can be seen that it has a fresh feeling of use.
On the other hand, the cosmetic of Comparative Example 2, which did not contain component B but contained carbomer, which is a known emulsifier, did not give a fresh feeling during use.
From the comparison between Example 1 and Comparative Example 1 and between Example 3 and Comparative Example 3, it can be seen that the inclusion of the C component improves the SPF value of the cosmetic.
From the comparison between Example 1 and Example 9, it can be seen that the SPF value is improved by further containing the D component. Further, from the comparison between Example 1 and Comparative Example 10, it can be seen that the addition of the E component further improves the feeling of freshness during use.

In addition, since there is no problem in emulsification stability in any of the cosmetics of Examples and Comparative Examples, it can be seen that not only emulsification stability but also a fresh feel can be achieved by including component B as an emulsifier. . Therefore, it can be seen that all of the cosmetics of the examples achieved a good SPF value, and achieved both an ultraviolet shielding ability and a fresh feeling in use.

Claims (11)

an organic UV absorber with a content of 12 % by mass or more relative to the total mass of the oil-in-water cosmetic;
The content is 0.05 to less than 1% by mass relative to the total mass of the oil-in-water cosmetic, and 2-acrylamido-2-methylpropanesulfonic acid units, (meth)acrylamide units, (meth)acrylic acid units, and a polymer containing at least one structural unit selected from the group consisting of vinylpyrrolidone units;
An oil-in-water cosmetic containing a carotenoid with a content of 0.00001 to 1% by mass with respect to the total mass of the oil-in-water cosmetic,
Furthermore, it contains an alcohol with 1 to 3 carbon atoms,
The organic ultraviolet absorber contains an organic ultraviolet absorber that absorbs UV-A waves with a wavelength of 320 nm to 340 nm,
The content of the organic ultraviolet absorber that absorbs UV-A waves with a wavelength of 320 nm to 340 nm is 7 % by mass or more with respect to the total mass of the oil-in-water cosmetic,
The carotenoid is at least one selected from astaxanthin and lycopene,
Oil-in-water cosmetic. The organic ultraviolet absorber includes ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, dimethicodiethylbenzalmalonate, t-butylmethoxydibenzoylmethane, homosalate, ethylhexyltriazone, methylenebisbenzotriazolyltetramethylbutylphenol, 2. The oil-in-water cosmetic according to claim 1, which is at least one selected from the group consisting of bisethylhexyloxyphenolmethoxyphenyltriazine and hexyl diethylaminohydroxybenzoylbenzoate. The polymer is a copolymer of dimethylacrylamide and 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, a copolymer of vinylpyrrolidone and 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, an acrylic Copolymers of hydroxyethyl acid and 2-acrylamido-2-methylpropanesulfonic acid or salts thereof, copolymers of vinylpyrrolidone and acrylic acid in which alkyl groups having 10 to 30 carbon atoms are ester-bonded, (meth) acrylics Copolymer of acrylic acid in which an acid or a salt thereof and an alkyl group having 10 to 30 carbon atoms are ester-bonded, modified with 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof and an alkyl group having 10 to 30 carbon atoms. The group consisting of copolymers with (meth)acrylic acid, copolymers of sodium acrylate and 2-acrylamido-2-methylpropanesulfonic acid, and copolymers of acrylamide and (meth)acrylic acid or salts thereof The oil-in-water cosmetic according to claim 1 or 2, which is at least one selected from the above. The polymers include (acryloyldimethyltaurate ammonium/VP) copolymer, (acrylates/alkyl acrylate (C10-30)) crosspolymer, (acrylamide/acryloyldimethyltaurate Na) copolymer, (eicosene/vinylpyrrolidone) copolymer, (acrylic Sodium acid/sodium acryloyldimethyltaurate) copolymer, and at least one selected from the group consisting of sodium acrylate/sodium acryloyldimethyltaurate copolymer, according to any one of claims 1 to 3. oil-in-water cosmetic. The oil-in-water cosmetic according to any one of claims 1 to 4 , further comprising at least one selected from tocopherol and dibutylhydroxytoluene. The oil-in-water cosmetic according to claim 5 , wherein the total content of the tocopherol and dibutylhydroxytoluene is 0.01% by mass or more relative to the total mass of the oil-in-water cosmetic. The oil-in-water cosmetic according to any one of claims 1 to 6 , further comprising at least one selected from the group consisting of inorganic powders. The oil-in-water cosmetic according to claim 7 , wherein the total content of the inorganic powder is 3% by mass or less with respect to the total mass of the oil-in-water cosmetic. Claims 1 to 8, wherein the content of the organic ultraviolet absorber that absorbs UV-A waves with a wavelength of 320 nm to 340 nm is 20% by mass or less with respect to the total mass of the oil-in-water cosmetic. The oil-in-water cosmetic according to any one of items 1 and 2. The oil-in-water cosmetic according to any one of claims 1 to 9, wherein the content of the organic ultraviolet absorber is 30% by mass or less with respect to the total mass of the oil-in-water cosmetic. The oil-in-water cosmetic according to any one of claims 1 to 10 , which is a sunscreen cosmetic.