JP5546809B2 - Emulsified cosmetics - Google Patents

Description

  The present invention relates to an oil-in-water composition useful for cosmetics and the like and a cosmetic containing the same.

  The stratum corneum lipid is a substance that is found between the cells of the stratum corneum and forms a layered structure and contributes to the adhesion of the stratum corneum and the hydration of the stratum corneum. Ceramide, which occupies about 50%, is attracting attention as an active ingredient for skin with reduced moisture, such as rough skin, dry skin, and aging skin. However, natural ceramides and other ceramides have a very high melting point and high crystallinity, so they are stable in cosmetics and the like unless they are complex emulsion systems that use a large amount of oils and regular surfactants. Could not be blended. (Patent Documents 1 to 3)

  On the other hand, batyl alcohol is generally used as an emulsifier (Patent Documents 4 to 6). In addition, tocopheryl phosphate and the like are known to have surface activity. However, it is not known at all that ceramide can be stably emulsified in combination or in combination (Patent Documents 7 and 8).

JP 2007-1950 A Japanese Patent Laid-Open No. 9-309813 JP 2007-31381 A JP 2002-308730 A Japanese Patent Laid-Open No. 9-48707 JP2000-72618 JP2008-230987 JP2003-212751

  An object of the present invention is to provide an oil-in-water emulsion composition that contains ceramides stably and has high temporal stability, and a cosmetic containing the same.

  By containing (a) ceramide, (b) α-tocopheryl phosphate and / or a salt thereof, and (c) batyl alcohol, an oil-in-water emulsion composition excellent in high-temperature stability can be provided.

  According to the present invention, an emulsified composition in which ceramides are stably emulsified and crystallization is suppressed can be obtained.

The ceramide used in the present invention is a general term for compounds in which a long-chain fatty acid is amide-bonded to the amino group of sphingosine, and ceramides 1 to 6 are known depending on the structure of sphingosine and the structure of long-chain fatty acid. In the present invention, any ceramide having a ceramide structure can be used. Among them, ceramide 2 (N-acyl sphingosine) or ceramide 3 (N-acyl dihydrosphingosine) is preferable. As ceramide 2, ceramide TIC-001 is commercially available from Takasago International Corporation, which can be purchased and used. Ceramide 3 is an N-acylated form of phytosphingosine, which is a hydroxy form of sphingosine, also known as plant ceramide, and can be obtained by hydrolyzing cerebroside, a glycosphingolipid contained in rice bran. Can do. Although the compounding quantity of the ceramide used for this invention is not specifically limited, Preferably it is 0.01 to 3.0 weight%, More preferably, it is 0.1 to 2.0 weight%.
The α-tocopherol phosphate ester and / or salt thereof used in the present invention may be anything but preferably a monoester, a salt is a metal salt such as sodium salt, disodium salt, potassium salt, dipotassium salt and / or monoethanolamine Organic salts such as triethanolamine may be used. The amount of α-tocopherol phosphate and / or salt thereof is preferably 0.05 to 5% by weight, more preferably 0.1 to 2% by weight.
The batyl alcohol (C21H44O3) used in the present invention is also called octadecyl glyceryl ether, glyceryl monostearyl ether or the like, and is a kind of alkyl having a long chain aliphatic alcohol having 18 carbon atoms ether-bonded to the sn-1 position of glycerol. Glyceryl ether.
Although the compounding quantity of the batyl alcohol used by this invention is not specifically limited, 0.1-10 weight% is preferable in the whole composition of this invention, More preferably, it is 0.5-6 weight%.

  The emulsion composition of the present invention can further contain an oily component. Such an oil component may be volatile or non-volatile, and may be solid, pasty, or liquid as a form at normal temperature. For example, hydrocarbons such as solid or liquid paraffin, petrolatum, ceresin, ozokerite, montan wax, squalane, squalene, eucalyptus oil, mint oil, camellia oil, macadamia nut oil, avocado oil, beef fat, lard, horse oil, egg yolk oil Oils such as olive oil, carnauba wax, lanolin, jojoba oil, glycerol monostearate, glycerol distearate, glycerol monooleate, isopropyl palmitate, isopropyl stearate, butyl stearate, isopropyl myristate, neocapric acid neo Pentyl glycol, diethyl phthalate, myristyl lactate, diisopropyl adipate, cetyl myristate, cetyl lactate, 1-isostearoyl-3-myristoyl glycerol, 2-ethylhexa Cetyl acid, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, 2-octyldecyl oleate, glycerol triisostearate, diparamethoxycinnamate mono-2-ethylhexanoate glyceryl, etc. Ester oil, higher fatty acids such as stearic acid, palmitic acid, oleic acid, higher alcohols such as stearyl alcohol and cetyl alcohol, natural essential oils such as camomil oil and lavender oil, lignan, vitamin E, oil-soluble vitamin C, vitamin A derivatives, oil In addition to functional oily substances such as soluble ultraviolet absorbers and fragrances, silicones and fluorine-based oils can be used.

  Silicones are those usually used in toiletry products. For example, octamethylpolysiloxane, tetradecamethylpolysiloxane, methylpolysiloxane, highly polymerized methylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclohexane. Methylcyclopolysiloxane such as pentasiloxane, trimethylsiloxysilicic acid, alkyl-modified silicone, polyether-modified silicone, amino acid-modified silicone, amino-modified silicone, fluorine-modified silicone, alkylglyceryl ether-modified silicone, alkyl, alkenyl or fluoroalkyl-modified silicone, etc. Of the modified silicone.

  As the fluorinated oil agent, perfluoropolyether which is a perfluoro organic compound which is liquid at normal temperature is preferable. For example, perfluorodecalin, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane. Perfluorodecane, perfluorododecane, perfluoropolyether and the like.

  The emulsion composition of the present invention can further contain a water-soluble organic solvent. Examples of the water-soluble organic solvent include lower alcohols such as ethanol and isopropanol, glycols such as ethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, 1,3-butylene glycol, and polyethylene glycol (average molecular weight 200 to 1540). Examples thereof include polyhydric alcohols such as polyoxyethylene methyl glucoside, glycerin and diglycerin, and tris (2- (2-ethoxyethoxy) ethyl) phosphate. One or more kinds can be used.

  The emulsified composition of the present invention can be suitably used as a cosmetic. Examples of cosmetics include foundations, lotions, creams, emulsions, lotions, gels, skin softening cosmetics, nutritional cosmetics, astringent cosmetics, whitening cosmetics, wrinkle improving cosmetics, anti-aging cosmetics, and antiperspirants. And skin cosmetics such as deodorants, and hair cosmetics such as hair styling agents and hair nourishing agents.

  Cosmetics contain preservatives, antioxidants, fragrances, UV absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, fungicides, skin protectants, water-soluble polymers, plant extracts, etc. can do.

An emulsified composition was prepared according to the formulation shown below, a high temperature (40 ° C., 1 month) stability test was performed, and the state of the sample after the test was observed visually and under a microscope, and evaluated according to the following evaluation criteria.
(Visual evaluation criteria)
○: No separation was observed.
Δ: Slight separation was observed.
X: Separation was observed.
(Microscope observation standard)
○: Aggregation of emulsified particles was not observed.
Δ: Slight aggregation of emulsified particles was observed.
X: Aggregation of the emulsified particles was observed, and the emulsified particle size was doubled or more.

An emulsified composition was prepared according to the formulation shown below, a high temperature (40 ° C., 1 month) stability test was performed, and the state of the sample after the test was observed with a polarizing microscope and evaluated according to the following evaluation criteria.
(Polarization microscope evaluation criteria)
(Double-circle): Crystal precipitation was not recognized.
○: Slight crystal precipitation was observed.
Δ: Precipitation of crystals was observed.

  From the results of Tables 1 and 2, the emulsified compositions containing ceramide, α-tocopheryl phosphate and / or salt thereof, and batyl alcohol, which are essential components of the present invention, all had good high-temperature stability. The content is 0.1 to 2.0% by mass, the content of α-tocopheryl phosphate and / or its salt is 0.1 to 2% by mass, and the content of batyl alcohol is 0.5 to 6% by mass. It was especially good.

Emulsion a) (mass%)
Jojoba alcohol 5.0
Ceramide 2 (Ceramide TIC-001: Takasago Incense) 0.4
Squalane 10.0
Batyl alcohol 3.0
B)
1,3-butanediol 2.0
Water 72.4
Sodium tocopheryl phosphate 0.1
1,2-pentanediol 2.0
Glycerin 5.0
Hyaluronic acid 0.1
(Production method) A) was heated to 80 ° C., while b) was heated to 85 ° C. and then emulsified with stirring, and then cooled to room temperature to prepare an emulsified composition.

Liquid foundation i) (% by mass)
Ion exchange water 35.5
1,3-butylene glycol 3.0
Sodium tocopheryl phosphate 2.0
Methylparaben 0.1
Phenoxyethanol 0.2
Isopropyl alcohol 3.0
Xanthan gum 0.1
Sodium metaphosphate 0.03
Titanium dioxide 4.0
Mica 20.0
Red iron oxide 0.02
Yellow iron oxide 0.04
Black iron oxide 0.01
Silicone powder 1.0
B)
Decamethylcyclopentasiloxane 25.0
Highly polymerized methylpolysiloxane (2) -methylpolysiloxane solution (20%) 2.0
Ceramide 2 (Ceramide TIC-001: Made by Takasago Incense) 0.5
Batyl alcohol 1.5
Honey wax 1.0
Multi wax 1.0
(Manufacturing method) b) was heated to 80 ° C, while a) was heated to 85 ° C and emulsified with stirring, and then cooled to room temperature to prepare an emulsified composition.

Liquid foundation i) (% by mass)
Hard lanolin 1.0
Batyl alcohol 2.8
Cetyl alcohol 1.0
Jojoba alcohol 0.5
Tocopherol acetate 0.05
Decamethylcyclopentasis 15.0
Behenyl alcohol 1.0
Ceramide 2 (Ceramide TIC-001: Takasago Incense) 0.1
B)
Purified water 42.48
Glycerin 15.0
Tocopherol sodium phosphate 1.0
Mica 15.0
Titanium dioxide 5.0
Red iron oxide 0.02
Yellow iron oxide 0.04
Black iron oxide 0.01
(Manufacturing method) b) was heated to 80 ° C, while a) was heated to 85 ° C and emulsified with stirring, and then cooled to room temperature to prepare an emulsified composition.

Makeup base a) (mass%)
Sodium stearoyl lactate 0.20
Batyl alcohol 1.50
Squalane 6.00
Octyldodecyl myristate 6.00
Methylphenyl polysiloxane 6.00
Ceramide 2 (Ceramide TIC-001: Made by Takasago Incense) 2.00
Polyglyceryl triisostearate 1.00
Butylparaben 0.10
B)
Purified water 55.24
Sodium tocopheryl phosphate 1.00
Hydroxyethanediphosphonic acid 0.06
Xanthan gum 0.20
1,3-butylene glycol 10.00
Methylparaben 0.20
Diglycerin 5.00
Titanium dioxide 4.93
Red iron oxide 0.02
Yellow iron oxide 0.04
Black iron oxide 0.01
Methyl polysiloxane 0.50
(Manufacturing method) b) was heated to 80 ° C, while a) was heated to 85 ° C and emulsified with stirring, and then cooled to room temperature to prepare an emulsified composition.

Examples 3 to 6 were all cosmetics excellent in high temperature stability. Needless to say, the present invention is not limited to such embodiments.

Claims (6)

An oil-in-water emulsion composition comprising the following components (a) to (c):
(A) Ceramide, (b) α-tocopheryl phosphate and / or salt thereof, (c) batyl alcohol   (A) Component content is 0.01 to 3.0 mass%, (b) component content is 0.05 to 5 mass%, and (c) component content is 0.1 to 10 mass%. The oil-in-water emulsion composition according to claim 1, wherein   (A) The content of the component is 0.1 to 2.0 mass%, the content of the (b) component is 0.1 to 2 mass%, and the content of the (c) component is 0.5 to 6 mass%. The oil-in-water emulsion composition according to claim 1, wherein   The oil-in-water emulsion composition according to claim 1 or 2, wherein component (a) is ceramide 2.   The component (b) is one or more esters and / or salts selected from monoesters, sodium salts, disodium salts, potassium salts, dipotassium salts, monoethanolamine salts, and triethanolamine salts. The oil-in-water emulsion composition according to any one of claims 1 to 3. The oil-in-water emulsified cosmetic according to any one of claims 1 to 5.