JP6284895B2 - Aerosol cosmetics - Google Patents

Description

  The present invention relates to an aerosol cosmetic.

Astaxanthin has a high singlet oxygen scavenging ability and is known to have an effect of suppressing skin photoaging caused by singlet oxygen, and is often used in cosmetics.
On the other hand, cosmetics such as aerosol cosmetics are known which are used by spraying a cosmetic composition with a propellant.

As an aerosol cosmetic containing astaxanthin, for example, a sunscreen lotion spray containing astaxanthin and LPG (liquefied petroleum gas) is known (for example, see Patent Document 1).
Further, a method for filling a skin beauty pack drug containing astaxanthin into a pressure container, filling it with carbon dioxide gas, and taking out the drug in the form of foam with carbon dioxide pressure, and using it as a skin beauty pack and cosmetic cream Is also known (see, for example, Patent Document 2).

International Publication No. 2014/185316 JP 2014-118408 A

When the present inventors examined the aerosol cosmetics containing astaxanthin, the following knowledge was acquired.
That is, in the case of an aerosol cosmetic that combines an aqueous cosmetic composition containing an astaxanthin emulsion and a propellant, there is a difference in the change in turbidity of the aqueous cosmetic composition before and after injection depending on the type of the propellant. I found.
Accordingly, an object of the present invention is to provide an aerosol cosmetic using an aqueous cosmetic composition containing an astaxanthin emulsion, and having a small change in turbidity of the cosmetic composition before and after injection. It is in.

The above problem is solved by the following means. That is,
<1> An aerosol cosmetic comprising a propellant containing carbon dioxide and an aqueous cosmetic composition containing water and an astaxanthin emulsion.

<2> The aerosol cosmetic according to <1>, wherein the total content of water and water-soluble components relative to the total amount of the aqueous cosmetic composition is 95% by mass or more and less than 100% by mass.

<3> The aerosol cosmetic according to <1> or <2>, wherein the aqueous cosmetic composition contains at least one selected from the group consisting of lecithin and a polyglycerol fatty acid ester.

<4> The aerosol cosmetic according to any one of <1> to <3>, wherein the content of astaxanthin is 0.00001% by mass to 0.01% by mass with respect to the total amount of the aqueous cosmetic composition.

<5> The aerosol cosmetic according to any one of <1> to <4>, wherein the aqueous cosmetic composition contains polyoxyethylene hydrogenated castor oil.

  ADVANTAGE OF THE INVENTION According to this invention, it is an aerosol cosmetics using the aqueous cosmetic composition containing an astaxanthin emulsion, Comprising: The aerosol cosmetics with few turbidity changes of an aqueous cosmetic composition before and behind injection are provided.

The aerosol cosmetic of the present invention is an aerosol cosmetic having a propellant containing carbon dioxide and an aqueous cosmetic composition containing water and an astaxanthin emulsion.
Here, the “aqueous cosmetic composition” refers to a composition containing a large amount of water (60% by mass or more) with respect to the total amount of the aqueous cosmetic composition, and in particular, the total content of water and water-soluble components. The content is preferably 95% by mass or more and less than 100% by mass, and more preferably 97% by mass or more and less than 100% by mass.
The “water-soluble component” means a component having a solubility in water at 25 ° C. of 1% by mass or more, that is, 10 g / L or more.

In an aerosol cosmetic using an aqueous cosmetic composition containing water and an astaxanthin emulsion and LPG (liquefied petroleum gas), the turbidity after injection is higher than the turbidity of the aqueous cosmetic composition before filling the aerosol container. The degree will rise. This is because a part of LPG (hydrocarbons such as propane and butane) is mixed with the aqueous cosmetic composition while the aqueous cosmetic composition and LPG are filled in the aerosol container and during injection. It is thought to be caused by Specifically, LPG breaks the hydrophilicity / hydrophobicity balance of the astaxanthin emulsion in the aqueous cosmetic composition (hydrocarbon affects the oil phase), and astaxanthin emulsified particles aggregate to form emulsified particle particles. It is considered that the turbidity increases as the diameter increases.
At the time of injection, when passing through the flow path until the injection of the aerosol container, the injection pressure is applied to the mixture of the propellant and the aqueous cosmetic composition, and the oil phase is mixed by injection or spraying at the time of injection. It is considered that the increase in turbidity is greatly affected by a change in physical pressure, such as that the propellant used has become normal pressure. In particular, it is considered that the effect of expansion when the propellant is at normal pressure deteriorates the turbidity of the aqueous cosmetic composition when the filler is LPG.

On the other hand, the aerosol cosmetic of the present invention includes an aqueous cosmetic composition containing water and an astaxanthin emulsion, and a propellant containing carbon dioxide.
By setting it as this structure, it can suppress that the turbidity of the aqueous cosmetic composition containing water and an astaxanthin emulsion rises after injection of aerosol cosmetics.
Moreover, it is thought that the aerosol cosmetics with little change in turbidity before and after the injection hardly increase the astaxanthin emulsified particles by the injection. Therefore, even when using aerosol cosmetics (that is, after spraying aerosol cosmetics), it is considered that the effects expected by including finely divided astaxanthin can be obtained at the same level as aerosol cosmetics at the time of manufacture. It is done.

In the present invention, “before and after injection” in “before and after injection” refers to a period from after preparation of an aqueous cosmetic composition to immediately before being injected through filling of an aqueous cosmetic composition into an aerosol container. "" Refers to after the aqueous cosmetic composition (aerosol cosmetic) is jetted from the aerosol container.
Therefore, the “turbidity before jetting” may be turbidity after preparation of the aqueous cosmetic composition and before filling into the aerosol container, or after being filled into the aerosol container and jetted. It may be the turbidity until just before. In the latter case, it can be confirmed when the filled aqueous cosmetic composition can be taken out from the aerosol container without spraying. Further, “turbidity after injection” means the turbidity of an aqueous cosmetic composition (collected material) recovered by spraying an aerosol cosmetic.
In the present invention, “the change in turbidity is small before and after injection” means that the emulsion state of the astaxanthin emulsion contained in the aqueous cosmetic composition after the injection of the aerosol cosmetic is the emulsion of the astaxanthin emulsion before the injection. This is an index indicating that the state is close to the state (that is, the expected emulsified state in which the effect expected of astaxanthin is easily developed).
Further, “turbidity” in the present invention was measured at 25 ° C. using light having a wavelength of 625 nm in a disposable 1 cm square cell with an ultraviolet absorption spectrum measuring instrument (U-3310, manufactured by Hitachi, Ltd.). Defined by absorbance.

Hereinafter, numerical ranges indicated using “to” in this specification indicate ranges including numerical values described before and after “to” as the minimum value and the maximum value, respectively.
Further, in this specification, the amount of each component in the aerosol cosmetic is such that when there are a plurality of substances corresponding to each component in the aerosol cosmetic, the plurality of substances present in the aerosol cosmetic unless otherwise specified. Means the total amount.
In the present invention, the “aqueous phase” used when obtaining an emulsion is used as a term for the “oil phase” regardless of the type of solvent.

  Hereinafter, the aqueous cosmetic composition and the propellant constituting the aerosol cosmetic of the present invention will be described in detail.

[Aqueous cosmetic composition]
The aqueous cosmetic composition in the present invention contains water and an astaxanthin emulsion, and may contain a water-soluble component and other additives as necessary.

[water]
The aqueous cosmetic composition in the present invention contains water.
The water used here is not particularly limited as long as it is applicable to cosmetics, and any ultrapure water such as purified water, distilled water, ion-exchanged water, pure water, milli-Q water, etc. should be used. Can do.
The milli-Q water is ultra-pure water obtained by the Milli-Q water production apparatus, which is an ultra-pure water production apparatus manufactured by Merck Millipore.
Water is one of the components constituting the aqueous phase.

In the aqueous cosmetic composition, the content of water can be appropriately adjusted within the following range depending on the purpose (use) and feeling of use of the aerosol cosmetic.
The water content is preferably 60% by mass or more and 99% by mass or less, more preferably 75% by mass or more and less than 100% by mass, and more preferably 85% by mass or more and less than 100% by mass with respect to the total amount of the aqueous cosmetic composition. Further preferred.
The content of water means the total content of water constituting the aqueous cosmetic composition, and includes water used for preparing an astaxanthin emulsion described later.

[Astaxanthin emulsion]
The aqueous cosmetic composition in the present invention contains an astaxanthin emulsion.
The content of the astaxanthin emulsion in the aqueous cosmetic composition can be appropriately adjusted from the point of use (use) of the aerosol cosmetic, effectiveness on the skin, and dyeing.
Generally, the content of the astaxanthin emulsion is preferably 0.001% by mass to 5% by mass and more preferably 0.005% by mass to 2% by mass with respect to the total amount of the aqueous cosmetic composition. Preferably, it is 0.01 mass% or more and 1 mass% or less.

The astaxanthin emulsion is preferably an oil-in-water emulsion (O / W emulsion) having emulsion particles containing astaxanthin.
By using an oil-in-water emulsion having emulsified particles containing astaxanthin, astaxanthin can be stably contained in the system of the aqueous cosmetic composition.

(Astaxanthin)
Astaxanthin encompasses at least one of derivatives such as astaxanthin and esters of astaxanthin. In the present invention, unless otherwise specified, these are collectively referred to as “astaxanthin”.

Astaxanthin used in the present invention can be any natural product such as plants, algae, crustaceans and bacteria, as long as it can be obtained according to a conventional method.
Examples of astaxanthin, which is a natural product, include red yeast faffia, hematococcus algae, marine bacteria (paracoccus), krill, and adonis (fukujukusa). Moreover, the extract from the culture can be mentioned.
Astaxanthin may be contained in the astaxanthin emulsion as an astaxanthin-containing oil obtained as a separated or extract from a natural product containing astaxanthin.
Astaxanthin may be a product obtained by appropriately purifying a product separated or extracted from this natural product as necessary, or may be a synthetic product.
Astaxanthin or astaxanthin-containing oils are those extracted from Haematococcus algae (also referred to as Haematococcus alga extract) and pigments derived from krill (also referred to as krill extract) from the viewpoint of quality or productivity. Particularly preferred.

In the present invention, as the astaxanthin or astaxanthin-containing oil, commercially available Haematococcus alga extract and krill extract can be used.
Examples of commercially available products of Hematococcus algae extract include, for example, ASTOTS-S, ASTOTS-ST, ASTOTS-2.5 O, ASTOTS-5 O, ASTOTS-10 O, etc. (trade names) of Takeda Paper Instruments Co., Ltd. Asteryl (registered trademark) oil 50F, Asteryl (registered trademark) oil 5F, etc. manufactured by Fuji Chemical Industry Co., Ltd., and BioAstin (registered trademark) SCE7, manufactured by Toyo Enzyme Chemical Co., Ltd. are available.
As a commercial product of krill extract, Astax ST (trade name) of Marine Daio Co., Ltd. can be obtained.

  The content of astaxanthin in the astaxanthin emulsion is preferably 0.01% by mass or more and 50% by mass or less, and more preferably 0.1% by mass or more and 35% by mass or less from the viewpoint of handling during production of the astaxanthin emulsion.

  The content of astaxanthin in the aqueous cosmetic composition can be determined from the expression of singlet oxygen scavenging ability (antioxidant effect) and the like, for example, 0.00001% by mass or more to 0% of the total amount of the aqueous cosmetic composition. 0.01 mass% or less (0.1 ppm or more and 100 ppm or less) is preferable, 0.00001 mass% or more and 0.0075 mass% or less (0.1 ppm or more and 75 ppm or less) is more preferable, and 0.0001 mass% or more and 0.005 mass or less. % Or less (1 ppm or more and 50 ppm or less) is more preferable.

(Oil component)
The astaxanthin emulsion preferably contains an oily component.
The oil component is preferably an oil component that is liquid at 25 ° C.
In the present invention, the “oil component” means a component having a solubility in water at 25 ° C. of less than 0.1% by mass (less than 1 g / L) and generally used as an oil component in the cosmetic field.
Further, the liquid at 25 ° C. means that the melting point or softening point is less than 25 ° C.

Examples of the oil component include fats and oils, hydrocarbons, waxes, higher fatty acids, and higher fatty acid esters. Among these, those that are liquid at 25 ° C. are preferable.
These oil components may be used alone or in combination of two or more.

  As fats and oils, avocado oil, almond oil, olive oil, cacao oil, cow oil, sesame oil, wheat germ oil, safflower oil, shea butter, turtle oil, coconut oil, persic oil, castor oil, grape oil, macadamia nut oil, mink oil , Egg yolk oil, palm oil, owl, rosehip oil, soybean oil, hardened oil (eg, hardened castor oil, hardened palm oil, hardened cocoa oil, hardened turtle oil, hardened mink oil, etc.), lanolin (wool fat), or And tocopherols extracted from these vegetable oils and fats (mixed tocopherols), tocotrienols and the like.

  Examples of the hydrocarbon include liquid paraffin, isoparaffin, petrolatum, paraffin wax, ceresin, microcrystalline wax, squalane and the like.

  Examples of the wax include orange luffy oil, carnauba wax, candelilla wax, jojoba oil, montan wax, beeswax, lanolin, whale wax, hydrogenated lanolin, hydrogenated jojoba oil, hydrogenated carnauba wax and the like.

  The higher fatty acid is not particularly limited as long as it has 12 or more carbon atoms. Lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, behenic acid, undecylenic acid, oxystearic acid, linoleic acid, lanolin fatty acid , Isopalmitic acid, isostearic acid, isotridecanoic acid and the like.

Examples of higher fatty acid esters include esters of higher fatty acids and lower alcohols, esters of higher fatty acids and intermediate or higher alcohols, esters of higher fatty acids and polyhydric alcohols, esters of oxyacids and higher alcohols, cyclic alcohol fatty acid esters, etc. Is mentioned.
More specifically, examples of esters of higher fatty acids and lower (2 to 4 carbon atoms) alcohols include ethyl linoleate, isopropyl myristate, and lanolin fatty acid isopropyl.
Examples of esters of higher fatty acids with intermediate (5 to 11 carbon atoms) or higher (12 or more carbon atoms) alcohols are hexyl laurate, myristyl myristate, cetyl myristate, octyldodecyl myristate, decyl oleate, oleic acid Examples thereof include octyldodecyl and cetyl palmitate.
Examples of esters of higher fatty acids and polyhydric alcohols include glyceryl trimyristate, glyceryl tri (caprylic acid / capric acid), propylene glycol dioleate, and glyceryl triisostearate.
Examples of esters of oxyacids and higher alcohols include cetyl lactate, myristyl lactate, and diisostearyl malate.
Examples of the cyclic alcohol fatty acid ester include cholesteryl stearate, cholesteryl isostearate, cholesteryl 12-hydroxystearate, and the like.

  Among the oily components described above, tri (caprylic acid / capric acid) glyceryl and tocopherol are preferred from the viewpoint of excellent compatibility with astaxanthin and stability, and tocopherol and tri (caprylic acid / capric acid) glyceryl are used in combination. Is preferred.

  The content of the oil component in the astaxanthin emulsion is not particularly limited, but from the viewpoint of stabilizing the dispersion of the astaxanthin emulsion, it is preferably 1 to 150 times the mass of the astaxanthin, preferably 5 times or more. 50 times or less is more preferable.

(lecithin)
The astaxanthin emulsion preferably contains lecithin.
The lecithin in the present invention includes a glycerin skeleton, a fatty acid residue, and a phosphate residue as essential components, and a base, a polyhydric alcohol, and the like bonded thereto, and is also referred to as a phospholipid.
Since lecithin has a hydrophilic group and a hydrophobic group in the molecule, it has been widely used as an emulsifier in the food, pharmaceutical and cosmetic fields.

Industrially, those having a lecithin purity of 60% or more are used as lecithin and can be used in the present invention, but the lecithin purity is generally 80% or more (more preferably 90% or more) and is generally referred to as high-purity lecithin. Those are preferred.
The lecithin purity is determined by subtracting the weight of the toluene-insoluble substance and the acetone-soluble substance by utilizing the property that lecithin is easily dissolved in toluene and not dissolved in acetone.

Examples of lecithin include various conventionally known ones extracted and separated from living bodies of plants, animals, and microorganisms.
Specific examples of such lecithin include various lecithins derived from plants such as soybean, corn, peanut, rapeseed and wheat, animals such as egg yolk and cows, and microorganisms such as Escherichia coli.
When such a lecithin is represented by a compound name, for example, glycerolecithin such as phosphatidic acid, phosphatidylglycerin, phosphatidylinositol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylserine, bisphosphatidic acid, diphosphatidylglycerin (cardiolipin), etc. A sphingolecithin such as sphingomyelin;

In the present invention, hydrogenated lecithin, enzymatically decomposed lecithin, enzymatically decomposed hydrogenated lecithin, hydroxylecithin and the like can be used in addition to high-purity lecithin.
Lecithin may be used alone or in the form of a mixture of plural kinds.

  In the astaxanthin emulsion, the lecithin content is preferably 0.1 times or more and 10 times or less, more preferably 0.5 times or more and 8 times or less, still more preferably with respect to the mass of astaxanthin. 1 to 5 times the amount.

  The content of lecithin in the aqueous cosmetic composition is 0.0001% by mass with respect to the total amount of the aqueous cosmetic composition from the viewpoint of feeling of use, turbidity stability of the aqueous cosmetic composition, and prevention of coloring over time. The content is preferably 1% by mass or more and more preferably 0.00015% by mass or more and 0.1% by mass or less.

(Water-soluble emulsifier)
The astaxanthin emulsion preferably contains a water-soluble emulsifier.
Here, a water-soluble emulsifier is contained in the above-mentioned water-soluble component.
The water-soluble emulsifier is not particularly limited as long as it is an emulsifier having a solubility in water of 1% by mass or more (10 g / L or more). However, a nonionic surfactant is preferable, and in order to obtain sufficient emulsifying power, For example, a nonionic surfactant having an HLB of 10 or more, preferably 12 or more is preferred.

  Here, HLB is a hydrophilic-hydrophobic balance that is usually used in the field of surfactants, and a commonly used calculation formula such as the Kawakami formula can be used. Kawakami's formula is shown below.

HLB = 7 + 11.7log (Mw / Mo)
Here, Mw is the molecular weight of the hydrophilic group, and Mo is the molecular weight of the hydrophobic group.

Moreover, you may use the numerical value of HLB described in the catalog etc.
Further, as can be seen from the above formula, an emulsifier having an arbitrary HLB value can be obtained by utilizing the additivity of HLB.

Examples of nonionic surfactants include organic acid monoglycerides, polyglycerol fatty acid esters, propylene glycol fatty acid esters, polyglycerol condensed ricinoleic acid esters, sorbitan fatty acid esters, and sucrose fatty acid esters. Among them, polyglycerol fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester are preferable, polyglycerol fatty acid ester is more preferable, and it is particularly preferable to use polyglycerol fatty acid ester and sucrose fatty acid ester in combination.
These nonionic surfactants are not necessarily highly purified by distillation or the like, and may be a reaction mixture.

Examples of the polyglycerol fatty acid ester used in the present invention include an average degree of polymerization of 2 or more, preferably 6 to 15, more preferably 8 to 10 and a fatty acid having 8 to 18 carbon atoms such as caprylic acid. , Esters with capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and linoleic acid.
Preferred examples of polyglycerol fatty acid esters include hexaglycerol monooleate, hexaglycerol monostearate, hexaglycerol monopalmitate, hexaglycerol monomyristate, hexaglycerol monolaurate, decaglycerol monooleate , Decaglycerin monostearic acid ester, decaglycerin monopalmitic acid ester, decaglycerin monomyristic acid ester, decaglycerin monolauric acid ester and the like. These polyglycerin fatty acid esters can be used alone or in combination of two or more.

  Examples of commercially available polyglycerin fatty acid esters include Nikko Chemicals Co., Ltd., NIKKOL DGMS, NIKKOL DGMO-CV, NIKKOL DGMO-90V, NIKKOL DGDO, NIKKOL DGKI, NIKKOL DGGIS, NIKKOL TGIS 1-O, NIKKOL Tettaglyn 3-S, NIKKOL Tettaglyn 5-S, NIKKOL Tetlagyn 5-O, NIKKOL Hexagly 1-M S, NIKKOL Hexaglyn 4-B, NIKKOL Hexaglyn 5-S, NIKKOL Hexaglyn 5-O, NIKKOL Hexaglyn PR-15, NIKKOL Decaglyn 1-L, NIKKOL Decaglyn 1-M, NIKKOL Decaglyn 1-SV, NIKKOL Decaglyn 1-50SV, NIKKOL Decaglyn 1- ISV, NIKKOL Decaglyn 1-O, NIKKOL Decaglyn 1-OV, NIKKOL Decaglyn 1-LN, NIKKOL Decaglyn 2-SV, NIKKOL Decaglyn 2-ISV, NIKKOL Decaglyn 3-SV, NIKKOL Decaglyn 3-OV, NIKKOL Decaglyn 5-SV, NIKK OL Decaglyn 5-HS, NIKKOL Decaglyn 5-IS, NIKKOL Decaglyn 5-OV, NIKKOL Decaglyn 5-O-R, NIKKOL Decaglyn 7-S, NIKKOL Decaglyn 7-O, NIKKOL Decaglyn 10-SV, NIKKOL Decaglyn 10-IS, NIKKOL Decaglyn 10-OV, NIKKOL Decaglyn 10-MAC, NIKKOL Decaglyn PR-20, etc. ("NIKKOL" is a registered trademark); Ryoto-polyglyceride LD-10, manufactured by Mitsubishi Chemical Foods Co., Ltd. 10D, M-7D, P-8D, S-28D, S-24D, SWA-20D, SWA-15D, SWA-10D, O- 50D, O-15D, B-100D, B-70D, ER-60D, Taiyo Chemical Co., Ltd. Sunsoft Q-17UL, Sunsoft Q-14S, Sunsoft A-141C, etc. ("Sunsoft" is all Registered trademark); Poem DO-100 manufactured by Riken Vitamin Co., Ltd., Poem J-0021, etc. (all "Poem" are registered trademarks);

The sucrose fatty acid ester used in the present invention preferably has a fatty acid having 12 or more carbon atoms, more preferably 12-20.
Preferred examples of sucrose fatty acid esters include sucrose dioleate, sucrose distearate, sucrose dipalmitate, sucrose dimyristic ester, sucrose dilaurate, sucrose monooleate, sucrose Examples thereof include sugar monostearate, sucrose monopalmitate, sucrose monomyristate, and sucrose monolaurate. In the present invention, these sucrose fatty acid esters can be used alone or in combination of two or more.

  Examples of commercially available sucrose fatty acid esters include Ryoto Sugar Esters S-070, S-170, S-270, S-370, S-370F, S-570, and S- manufactured by Mitsubishi Chemical Foods Corporation. 770, S-970, S-1170, S-1170F, S-1570, S-1670, P-070, P-170, P-1570, P-1670, M-1695, O-170, O-1570, OWA-1570, L-195, L-595, L-1695, LWA-1570, B-370, B-370F, ER-190, ER-290, POS-135, manufactured by Daiichi Kogyo Seiyaku Co., Ltd. , DK ester SS, F160, F140, F110, F90, F70, F50, F-A50, F-20W, F-10, F-A10E, Cosmelike B-30, S-10 S-50, S-70, S-110, S-160, S-190, SA-10, SA-50, P-10, P-160, M-160, L-10, L-50, L- 160, L-150A, L-160A, R-10, R-20, O-10, O-150 and the like.

  The content of the water-soluble emulsifier in the astaxanthin emulsion is 1 to 100 times the mass of astaxanthin from the viewpoint of stabilizing the astaxanthin emulsion and suppressing foaming, which are easy to form fine emulsified particles. Preferably, it is 2 times or more and 50 times or less, more preferably 5 times or more and 25 times or less.

  The content of the water-soluble emulsifier in the aqueous cosmetic composition is 0.0001 based on the total amount of the aqueous cosmetic composition from the viewpoint of turbidity stability of the aqueous cosmetic composition, prevention of irritation to the skin, and foaming. The content is preferably from 2% by mass to 2% by mass, and more preferably from 1% by mass to 0.2% by mass.

  The aqueous cosmetic composition in the present invention preferably contains at least one selected from the group consisting of lecithin and polyglycerin fatty acid ester from the viewpoint of stability of the astaxanthin emulsion. It is preferable to use one or more of each.

(water)
The astaxanthin emulsion preferably contains water.
The water used here is the same as the water constituting the aqueous cosmetic composition, and the same water is used.

  In the astaxanthin emulsion, the content of water is preferably 5 times or more and 1000 times or less, more preferably 10 times or more and 800 times or less, and still more preferably 20 times or more of the mass of astaxanthin. The amount is 100 times or less.

[Other additives]
(Stabilizer)
The aqueous cosmetic composition in the present invention preferably contains a stabilizer that can prevent oxidative degradation of astaxanthin and improve the stability of astaxanthin.
As the stabilizer, ascorbic acid and ascorbic acid derivatives are preferably used.
These stabilizers are included in the water-soluble component described above.

Specific examples of ascorbic acid and ascorbic acid derivatives include ascorbic acid, sodium ascorbate, potassium ascorbate, calcium ascorbate, ascorbyl sulfate, ascorbyl sulfate disodium salt, ascorbyl-2-glucoside, ascorbyl phosphate palmitate 3 Examples include sodium, magnesium ascorbate phosphate, sodium ascorbate phosphate, and the like.
Among these, magnesium ascorbate phosphate and sodium ascorbate phosphate are preferable, and magnesium ascorbate phosphate is particularly preferable.

As these ascorbic acid and ascorbic acid derivatives, commercially available products can be used as appropriate.
Examples of commercially available products include L-ascorbic acid (Takeda Pharmaceutical, Fuso Chemical, BASF Japan, Daiichi Pharmaceutical and others), L-ascorbic acid Na (Takeda Pharmaceutical, Fuso Chemical, BASF Japan, Daiichi Pharmaceutical and others), Ascorbyl-2-glucoside (trade name AA-2G: Hayashibara Biochemical Research Institute) and the like can be mentioned.
Moreover, as magnesium ascorbate phosphate, a brand name: Ascorbic acid PM (Showa Denko KK), a brand name: NIKKOL (registered trademark) VC-PMG (Nikko Chemicals), a brand name Seamate (Takeda Pharmaceutical Co., Ltd.), etc. It is done.
Further, examples of sodium ascorbate phosphate include: Ascorbic acid PS (Showa Denko).

From the viewpoint of stabilization of astaxanthin, the content of the stabilizer in the aqueous cosmetic composition is
0.01 mass% or more and 5 mass% or less are preferable with respect to the aqueous | water-based cosmetic composition whole quantity, 0.1 mass% or more and 3 mass% or less are more preferable, and 0.3 mass% or more and 2 mass% or less are still more preferable.

(Polyoxyethylene hydrogenated castor oil)
The aqueous cosmetic composition in the present invention preferably contains polyoxyethylene hydrogenated castor oil from the viewpoint of stably incorporating an oily component such as a fragrance into the aqueous cosmetic composition.
In addition, since the aqueous cosmetic composition contains polyoxyethylene hydrogenated castor oil, an increase in turbidity of the aqueous cosmetic composition can be further suppressed after the aerosol cosmetic is injected.

The polyoxyethylene hydrogenated castor oil is preferably a hydrogenated castor oil derivative having 20 to 100 ethylene oxide units in the molecule. For example, POE (40) hydrogenated castor oil, POE (60) hydrogenated castor oil, POE (100) Examples include hardened castor oil.
As polyoxyethylene hydrogenated castor oil, commercially available products such as NIKKOL (registered trademark) HCO (Nikko Chemicals Co., Ltd.), EMALEX (registered trademark) HC (Nippon Emulsion Industry Co., Ltd.), UNIOX HC (Nissho), etc. May be used.

  The content of the polyoxyethylene hydrogenated castor oil in the aqueous cosmetic composition is preferably 0.01% by mass or more and 1% by mass or less based on the total amount of the aqueous cosmetic composition from the viewpoint of stabilization of the astaxanthin emulsion. 0.05 mass% or more and 0.7 mass% or less is more preferable, and 0.1 mass% or more and 0.4 mass% or less is still more preferable.

(Other oily ingredients)
The aqueous cosmetic composition in the present invention may contain oily components such as preservatives, moisturizers, anti-inflammatory agents, antioxidants, and fragrances in addition to the oily components contained in the aforementioned astaxanthin emulsion. .
Examples of the preservative that becomes an oily component include ethyl paraben, propyl paraben, butyl paraben, and butyl carbamate propynyl iodide.
Examples of the humectant serving as the oil component include higher alcohols and silicon compounds. Examples of the higher alcohol include octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol and the like. Examples of the silicon compound include dimethicone, cyclopentasiloxane, methyltrimethicone, and highly polymerized dimethiconol.
Examples of the anti-inflammatory agent serving as an oil component include stearyl glycyrrhetinate and glycyrrhetinic acid.
As an antioxidant used as an oily component, β-carotene, lycopene, vitamin A (retinol), retinoic acid, tocopherol, tocotrienol and the like can be mentioned.
As a fragrance | flavor used as an oil-based component, a natural fragrance | flavor, a synthetic fragrance | flavor etc. are mentioned, for example. Examples of natural fragrances include perfume oils prepared according to conventional methods using grass roots, bark, flowers, fruits, fruit skins, or other animals and plants as raw materials. Natural fragrances include essential oils and the like obtained by treating natural materials by a steam distillation method, a pressing method, an extraction method, or the like.

  In addition, it is preferable that the total content of the oil component (total oil component including the oil component contained in the above-mentioned astaxanthin emulsion) in the aqueous cosmetic composition is less than 5% by mass with respect to the total amount of the aqueous cosmetic composition. The content is more preferably 0.0001% by mass to 3% by mass, and still more preferably 0.0002% by mass to 2% by mass.

(Polyhydric alcohol)
The aqueous cosmetic composition in the present invention may contain a polyhydric alcohol from the viewpoint of obtaining fine emulsified particles, obtaining the stability of the emulsion, and enhancing the feeling of use (moisturizing properties).
Moreover, this polyhydric alcohol may be contained in the astaxanthin emulsion.

Examples of the polyhydric alcohol include glycerin, 1,3-butanediol, ethylene glycol, and pentylene glycol. Polyhydric alcohol can be used individually by 1 type or in combination of 2 or more types.
These polyhydric alcohols are included in the aforementioned water-soluble components.

  When polyhydric alcohol is used in the aqueous cosmetic composition, the content of the polyhydric alcohol is preferably 0.5% by mass or more and 25% by mass or less with respect to the total amount of the aqueous cosmetic composition, and is 1% by mass or more and 20% by mass. It is more preferable that the amount is not more than mass%.

(Additive)
The aqueous cosmetic composition in the present invention may contain additives as necessary in addition to the above-mentioned components within a range not impairing the effects of the present invention.
As the additive, various components that can be blended as cosmetics can be used depending on the purpose.

Specific additives include, for example, functional ingredients (such as anti-odor agents, anti-acne agents, bactericides / disinfectants, whitening agents, keratin softeners, etc.), viscosity adjusters, pH adjusters, pH buffer agents, UV absorbers. And water-soluble fragrances, colorants, organic solvents, water-soluble preservatives and the like.
Specific examples of additives include copper carrageenan, locust bean gum, guar gum, hydroxypropyl guar gum, xanthan gum, karaya gum, tamarind seed polysaccharide, gum arabic, tragacanth gum, hyaluronic acid, sodium hyaluronate, chondroitin sulfate sodium, dextrin, etc. Monosaccharides or polysaccharides; sugar alcohols such as sorbitol, mannitol, maltitol, lactose, maltotriitol, xylitol; vitamin B1 compounds such as thiamine; vitamin B2 compounds such as riboflavin; vitamin B3 such as nicotinic acid and nicotinamide Compound: Vitamin B5 compound such as niacin, pantothenic acid, pantothenyl ethyl ether, vitamin B6 compound such as pyridoxine, vitamin B7 compound such as biotin, Vitamin B12 compounds such as balamines, vitamin B groups such as folic acid; water-soluble vitamin compounds such as γ-oryzanol, orotic acid, glucuronolactone, glucuronic acid amide, and yoquinin; inorganic salts such as sodium chloride and sodium sulfate; casein and albumin , Proteins having a molecular weight exceeding 5000 such as methylated collagen, hydrolyzed collagen, water-soluble collagen, gelatin; glycine, alanine, valine, leucine, isoleucine, serine, threonine, aspartic acid, glutamic acid, cystine, methionine, lysine, hydroxylysine, Amino acids such as arginine, histidine, phenylalanine, tyrosine, tryptophan, proline, hydroxyproline, acetylhydroxyproline and derivatives thereof; carboxyvinyl polymer, poly Synthetic polymers such as sodium acrylate, polyvinyl alcohol, polyethylene glycol, ethylene oxide / propylene oxide block copolymer; water-soluble cellulose derivatives such as hydroxyethyl cellulose / methyl cellulose; flavonoids (catechin, anthocyanin, flavone, isoflavone, flavan, flavanone , Rutin); phenolic acid compounds (chlorogenic acid, ellagic acid, gallic acid, propyl gallate, etc.); hydroxystilbenes including lignan compounds, curcumin compounds, coumarin compounds, pterostilbenes, and the like.

[Preferred physical properties of water-soluble cosmetics]
The pH of the aqueous cosmetic composition is preferably 5.0 or more and 7.5 or less, and more preferably 6.5 or more and 7.5 or less.
By setting it as this pH range, the storage stability of an astaxanthin emulsion, especially the storage stability at room temperature (25 ° C.) can be improved.
The pH in the present invention can be measured using, for example, Toa DK Corporation, HM-30R type (trade name), and the value measured at 25 ° C. is adopted.

The turbidity of the aqueous cosmetic composition is preferably 0 or more and 0.15 or less, more preferably 0 or more and 0.12 or less, and still more preferably 0 or more and 0.05 or less, before filling the aerosol container.
The turbidity of the aqueous cosmetic composition recovered by spraying the aerosol cosmetic is preferably 0 or more and 0.15 or less, more preferably 0 or more and 0.12 or less, and still more preferably 0 or more and 0.05 or less.
In particular, when the content of astaxanthin in the aqueous cosmetic composition exceeds 0.001% by mass (10 ppm), the turbidity before filling the aerosol container and the aqueous cosmetic recovered by spraying the aerosol cosmetic The turbidity of the composition is preferably 0.05 or less.
Further, when the content of astaxanthin in the aqueous cosmetic composition is 0.001% by mass (10 ppm) or less, the turbidity before filling the aerosol container and the aqueous makeup recovered by spraying the aerosol cosmetic The turbidity of the material composition is preferably 0 or more and 0.02 or less.
Here, the turbidity in the present invention is 625 nm, which is around the absorption wavelength of astaxanthin, measured using, for example, a spectroscopic hardness meter U-3310 manufactured by Hitachi, Ltd. using a 1 cm optical path length cell containing a measurement sample. The absorbance value at is adopted.

[Method for preparing aqueous cosmetic composition]
The aqueous cosmetic composition in the present invention is obtained by preparing an astaxanthin emulsion and then mixing the prepared astaxanthin emulsion and other components.

The astaxanthin emulsion is produced by a production method including mixing an oil phase composition containing astaxanthin and an aqueous phase composition and emulsifying by an ordinary method.
In the present invention, the oil phase composition preferably contains an oil component and lecithin together with astaxanthin.
On the other hand, the water phase composition preferably contains water, a water-soluble emulsifier, and a polyhydric alcohol.

Hereinafter, the preferable preparation method of an astaxanthin emulsion is demonstrated in detail.
For example, a) Water, a polyhydric alcohol, and a water-soluble emulsifier are mixed and dissolved to obtain an aqueous phase composition. B) Astaxanthin, an oily component, and lecithin are mixed and dissolved to obtain an oil phase composition. And c) The aqueous phase composition and the oil phase composition are mixed with stirring to perform emulsification dispersion.

  When emulsifying and dispersing, for example, after emulsification using a normal emulsifying device using a shearing action such as a stirrer, impeller stirring, homomixer, continuous flow type shearing device, etc., two or more types are passed by a method such as passing through a high-pressure homogenizer. It is particularly preferable to use the above emulsifying apparatus together. By using a high-pressure homogenizer, the emulsified particles can be made more uniform in particle size. For the purpose of further homogenizing the particle size, emulsification and dispersion may be performed a plurality of times.

The high-pressure homogenizer includes a chamber-type high-pressure homogenizer having a chamber in which a flow path for processing liquid is fixed, and a homogeneous valve-type high-pressure homogenizer having a homogeneous valve.
The homogeneous valve type high-pressure homogenizer can easily adjust the width of the flow path of the treatment liquid, so that the pressure and flow rate during operation can be arbitrarily set, and the operation range is wide. Can be used.
Although the degree of freedom in operation is low, a chamber type high pressure homogenizer can be suitably used for applications that require ultra-high pressure because a mechanism for increasing pressure is easy to make.

Examples of the chamber type high-pressure homogenizer include a microfluidizer (manufactured by Microfluidics), a nanomizer (manufactured by Yoshida Kikai Kogyo Co., Ltd.), an optimizer (manufactured by Sugino Machine Co., Ltd.), and the like.
As the homogeneous valve type high-pressure homogenizer, Gorin type homogenizer (manufactured by APV), Lanier type homogenizer (manufactured by Lanier), high-pressure homogenizer (manufactured by Niro Soabi), homogenizer (manufactured by Sanwa Machinery Co., Ltd.), high-pressure homogenizer ( Izumi Food Machinery Co., Ltd.), ultra-high pressure homogenizer (manufactured by Ika), and the like.

In the present invention, the pressure of the high-pressure homogenizer is preferably 50 MPa or more, more preferably 50 MPa or more and 250 MPa or less, and still more preferably 100 MPa or more and 250 MPa or less.
From the viewpoint of maintaining the particle size of the emulsified particles, the emulsified and dispersed emulsion is preferably cooled through some cooler within 30 seconds, preferably within 3 seconds immediately after passing through the chamber.

  An aqueous cosmetic composition is prepared by mixing the astaxanthin emulsion obtained as described above and other components including water.

[Propellant]
The aerosol cosmetic of the present invention uses a propellant containing carbon dioxide gas.
As long as the effects of the present invention are not impaired, the propellant may be used in combination with a propellant used for aerosol cosmetics in addition to carbon dioxide gas.
Examples of the propellant that can be used in combination with carbon dioxide include compressed nitrogen, compressed air, liquefied petroleum gas (LPG), isobutane, and dimethyl ether.

  From the viewpoint of further suppressing the increase in turbidity of the aqueous cosmetic composition, the propellant preferably contains carbon dioxide at 80% by volume or more, and is 100% by volume (the propellant consists only of carbon dioxide). It is more preferable.

When filling an aerosol container with a propellant, the internal pressure of the container may be determined by not affecting the properties and physical properties of the aqueous cosmetic composition filled together, and by the ejection properties.
Specifically, the internal pressure of the container at the time of filling the propellant is preferably 0.1 MPa or more and 1.5 MPa or less, more preferably 0.2 MPa or more and 1.0 MPa or less, and further preferably 0.3 MPa or more and 0.85 MPa or less. .

[Aerosol container]
The aerosol container filled with the aerosol cosmetic of the present invention may be a pressure-resistant container, and a container using a material such as metal, glass, or plastic can be used.
Moreover, a well-known method can be used as a filling method of the aerosol cosmetics to an aerosol container. Specific examples include a gasser shaker method, a saturator method, a through valve method, and an undercup method.
When the gasser shaker method or the like is used as a filling method for the aerosol cosmetic, an aluminum impact can, an aluminum DI (Drawing and Ironing) can, and a tin monoblock can with high pressure resistance are preferable.
In addition, when the aerosol container is a double container having an inner bag filled with the contents (aqueous cosmetic composition), the inner bag should be made of a material such as polyethylene or polypropylene in order to ensure a certain degree of gas permeability. The one used is preferred.

[Use of aerosol cosmetics]
Examples of the use of the aerosol cosmetics of the present invention include hair cosmetics, skin care cosmetics (skin lotion, cosmetic liquid, etc.), UV care cosmetics such as sunscreen sprays, body cosmetics, etc. It is not limited to.

  Hereinafter, the present invention will be described in detail with reference to examples. However, the present invention is not limited to them.

[Preparation of Astaxanthin Emulsion (1)]
The following components were heated at 70 ° C. for 1 hour and dissolved to obtain an aqueous phase composition A.
-Composition of aqueous phase composition A-
・ Sucrose stearate (HLB = 16) 33.0 g
・ Decaglyceryl monooleate (HLB = 12) 67.0 g
・ Glycerin 450.0g
・ Pure water 300.0g

The following components were heated at 70 ° C. for 1 hour and dissolved to obtain an oil phase composition A.
-Composition of oil phase composition A-
・ Astaxanthin-containing oil 150.0g
(Krill extract, Astax ST: Marine Daio Co., Ltd., containing 5% by mass astaxanthin)
・ Mix tocopherol 30.0g
(RIKEN E Oil 800, Riken Vitamin Co., Ltd.)
・ Medium chain fatty acid glyceride 10.0g
(Coconard (registered trademark) MT, Kao Corporation)
・ Lecithin 10.0g
(Resion (registered trademark) P, derived from soybean, Riken Vitamin Co., Ltd.)

While maintaining the obtained aqueous phase composition A at 70 ° C., it was stirred at 10,000 rpm (10,000 times / min) using an ultrasonic homogenizer (model: HP93, SMT Co., Ltd.). Addition to obtain a pre-emulsion.
Subsequently, the obtained preliminary emulsified product was cooled to about 40 ° C., and high pressure emulsification was performed at a pressure of 200 MPa using an ultrahigh pressure emulsifying device (model name: Ultimateizer HJP-25005, Sugino Machine Co., Ltd.). Then, it filtered using the micro filter with an average hole diameter of 1 micrometer, and obtained the astaxanthin emulsion (Astaxanthin content rate: 0.75 mass%).

  The obtained astaxanthin emulsion is diluted with milli-Q water so as to have a concentration of 1% by mass, and the particle size of the dispersed particles is determined using a particle size analyzer (model: FPAR-1000, Otsuka Electronics Co., Ltd.). When measured, the average particle diameter determined by cumulant analysis was 58 nm (median diameter (d)).

[Preparation of Astaxanthin Emulsion (2)]
Astaxanthin emulsion was prepared in the same manner as in preparation of astaxanthin emulsion (1), except that astaxanthin-containing oil was replaced with ASTOTS-S (Takeda Paper Co., Ltd., containing 20% by mass of astaxanthin) as an extract of hematococcus alga. (2) was prepared.
In addition, the usage-amount of ASTOTS-S was adjusted so that the density | concentration of astaxanthin might become the same as an astaxanthin emulsion (1).

[Preparation of aqueous cosmetic composition]
The components described in Table 1 below (including astaxanthin emulsion (1)) were mixed using the amounts described in Table 1 below, and aqueous cosmetic composition Nos. Used in Examples and Comparative Examples were mixed. 1-No. 3 was prepared.

<Measurement of turbidity before jetting>
Aqueous cosmetic composition no. 1-No. The turbidity of 3 was measured as follows.
2 mL of the aqueous cosmetic composition was placed in a 1 cm optical path length cell, and using this 1 cm optical path length cell, the absorbance at 625 nm was measured with a spectroscopic hardness meter U-3310 manufactured by Hitachi, Ltd., and this was defined as turbidity. The measurement was performed at 25 ° C.
The measured turbidity is shown in Table 1 as “turbidity before jetting”.

[Examples 1-3, Comparative Examples 1-3]
An aerosol container (aluminum pressure-resistant container, capacity 100 mL) was charged with 49.0 g of an aqueous cosmetic composition and 1.0 g of carbon dioxide gas (with a container internal pressure of about 0.65 MPa). 1-3 aerosol cosmetics were obtained.
In addition, 47.5 g of the aqueous cosmetic composition and 2.5 g of LPG were filled in an aerosol container (aluminum pressure-resistant container for aluminum, capacity 100 mL), and the aerosol cosmetics of Comparative Examples 1 to 3 were filled. Obtained.
The aqueous cosmetic compositions used in each example and comparative example are shown in Table 1 below.

<Measurement of turbidity after injection>
The aerosol cosmetic material obtained as described above was sprayed, the sprayed cosmetic material was recovered, and 2 mL of the recovered material was placed in a 1 cm optical path length cell.
Using this 1 cm optical path length cell, the absorbance at 625 nm was measured with a spectral hardness meter U-3310 manufactured by Hitachi, Ltd., and this was taken as turbidity. The measurement was performed at 25 ° C.
The measured turbidity is shown in Table 1 as “turbidity after injection”.
In addition, “(turbidity after injection) − (turbidity before injection)” was calculated as the difference (Δ) in turbidity before and after injection, and is shown in Table 1.
In addition, when the difference in turbidity before and after injection is 0.02 or more, a change in the color of the aqueous cosmetic composition before and after injection can be recognized visually. In particular, when the difference in turbidity before and after injection is 0.1 or more, it can be recognized that the white turbidity is increased and the hue is clearly changed.

As is apparent from Table 1, when Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, and Example 3 and Comparative Example 3 are compared, respectively, in Examples using carbon dioxide as a propellant, aqueous makeup It can be seen that the turbidity after injection of the material composition does not increase, and the change in turbidity is small before and after injection.
In particular, the aerosol cosmetic of Example 1 containing an aqueous cosmetic composition containing polyoxyethylene hydrogenated castor oil has a smaller change in turbidity before and after injection than Example 2 and Example 3. I understand.
In this way, the aerosol cosmetics with little change in turbidity before and after injection are in a state in which the astaxanthin finely divided before being filled into the aerosol container is almost intact at the time of use (that is, after injection of the aerosol cosmetics). It can be applied to the skin. Therefore, according to the aerosol cosmetics of each example, it is difficult to reduce the effect expected by including finely divided astaxanthin at the time of use.

[Example 4]
The aqueous cosmetic composition No. 1 was the same as Example 1 except that the astaxanthin emulsion (1) used in Example 1 was replaced with the astaxanthin emulsion (2). 4 was obtained.
Subsequently, aqueous cosmetic composition No. An aerosol cosmetic material of Example 4 was obtained in the same manner as Example 1 except that 4 was used.
When the turbidity was evaluated for the aerosol cosmetic composition of Example 4 obtained, the same results as in Example 1 were obtained.

[Example 5]
-Aerosol cosmetics containing lotion-
A lotion having the following composition was prepared by a conventional method (total amount: 100% by mass).
[Composition] [Content (% by mass)]
・ Arbutin 2.0
・ Dipotassium glycyrrhizinate 1.0
・ Oryzanol 0.01
・ Lycopene oil 0.01
・ Sodium hyaluronate 0.2
・ Phosphate-L-ascorbyl magnesium 1.0
・ Citric acid 1.0
・ Xanthan gum 0.02
・ Dipropylene glycol 4.0
・ Polyoxyethylene methyl glucoside 1.0
・ 1,3-butylene glycol 4.0
・ Ethanol 2.0
・ Polyoxyethylene hydrogenated castor oil (60 EO) 0.2
・ Phenoxyethanol 0.3
・ Glycerin mono-2-ethylhexyl ether 0.2
・ Polyoxyethylene phytosterol (NIKKOL BPS-20: Nikko Chemicals) 0.03
N-acetyl-L-hydroxyproline 0.1
・ Water-soluble collagen (collagen P (PF): Nitta gelatin) 1.0
Hydrolyzed collagen (Falconix CTP-F) 1.0
・ Seaweed extract (1) 1.0
・ Astaxanthin emulsion (containing krill extract) 0.1
[Astaxanthin emulsion (1) prepared by the method described above]
-Remaining amount of water An aerosol container (aluminum pressure-resistant container, capacity 100 mL) is charged with 49.0 g of the above-mentioned lotion and 1.0 g of carbon dioxide gas (with an internal pressure of about 0.65 MPa). A contained aerosol cosmetic was obtained.

Claims (5)

A propellant containing carbon dioxide,
An aqueous cosmetic composition comprising water and an astaxanthin emulsion;
Aerosol cosmetics having   The aerosol cosmetic according to claim 1, wherein the total content of water and water-soluble components with respect to the total amount of the aqueous cosmetic composition is 95% by mass or more and less than 100% by mass.   The aerosol cosmetic according to claim 1 or 2, wherein the aqueous cosmetic composition contains at least one selected from the group consisting of lecithin and polyglycerin fatty acid ester.   The aerosol cosmetic composition according to any one of claims 1 to 3, wherein the content of astaxanthin is 0.00001 mass% to 0.01 mass% with respect to the total amount of the aqueous cosmetic composition.   The aerosol cosmetic according to any one of claims 1 to 4, wherein the aqueous cosmetic composition contains polyoxyethylene hydrogenated castor oil.