JP7381457B2 - warming cosmetics - Google Patents

Description

The present invention relates to a warming cosmetic that provides a warming sensation when applied to the skin. More specifically, the present invention relates to a water-in-oil type warming cosmetic that has excellent emulsion stability, exhibits beauty effects, and has a good feeling of use.

In general, it is known that providing an appropriate sense of warmth to the skin promotes blood circulation in the skin, increases metabolism, and has the effect of improving complexion, relaxation, and recovery from fatigue. Therefore, in anticipation of these effects, pyrogenic substances are incorporated into cosmetics. As pyrogenic substances to be incorporated into cosmetics, humectants such as polyhydric alcohols, zeolites, metal salts, or metal oxides are widely used. All of these are hygroscopic and generate heat when they come into contact with moisture on the skin, giving the skin a warm sensation.

Patent Document 1 discloses a warming cosmetic in which polyhydric alcohol is emulsified using a specific nonionic surfactant to form an oil-in-polyhydric alcohol type because it has a moderate viscosity and an excellent warming effect. A fee is proposed. Further, Patent Document 2 proposes dispersing highly exothermic zeolite in a polyhydric alcohol solvent to enhance the warming effect.
As mentioned above, various bases have been proposed as warming cosmetics, but the cosmetics of Patent Document 1 are oil-in-water bases and the polyhydric alcohol comes into direct contact with the skin, resulting in noticeable stickiness. expensive. Therefore, it was a rinse-off type cleanser that was applied to the skin and washed off after a certain period of time. Further, although the cosmetic of Patent Document 2 is a leave-on type, it is non-aqueous, and therefore it is difficult to stably incorporate an aqueous solution containing a salt-type drug having a cosmetic effect.

Therefore, there is a demand for a water-in-oil base that exhibits an excellent warming effect, has excellent stability and usability, and is capable of incorporating cosmetically effective agents such as whitening ingredients.

Japanese Patent Application Publication No. 2014-37404 JP2016-193841A

An object of the present invention is to provide a water-in-oil type warming cosmetic that exhibits an excellent warming effect, has a good feeling in use, and has excellent storage stability.

The present inventors conducted extensive studies and found that the above object can be achieved by blending a polyhydric alcohol, an oil phase thickener, an emulsifier, and water, leading to the completion of the present invention.
That is, the present invention
polyhydric alcohol,
oil phase thickener,
It is characterized by a water-in-oil type warming cosmetic containing an emulsifier and water.

The warming cosmetic composition of the present invention exhibits an excellent warming effect and also has excellent emulsion stability. In addition, since the warming cosmetic of the present invention is a water-in-oil type warming cosmetic, it prevents polyhydric alcohol from coming into direct contact with the skin, so it contains a high amount of humectant (polyhydric alcohol). Despite this, stickiness is suppressed compared to conventional oil-in-water or oil-in-polyhydric alcohol type warming cosmetics. Therefore, the warming cosmetic of the present invention can also be used as a leave-on type warming cosmetic base. Furthermore, since water can be blended, salt-type drugs having beauty effects such as whitening ingredients can also be blended.

The warming cosmetic composition of the present invention is characterized by containing a polyhydric alcohol, an oil phase thickener, an emulsifier, and water as essential components. The present invention will be explained in detail below.

<Polyhydric alcohol>
The polyhydric alcohol used in the warming cosmetic composition of the present invention is one that imparts a warming sensation when applied to the skin. Specific examples include, but are not limited to, glycerin, diglycerin, polyglycerin, 1,3-butylene glycol, ethylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol (PEG-8 etc.), polypropylene glycol, polyethylene glycol・Polypropylene glycol, methylgluceth-10, trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, sorbitan, glucose, sorbitol, maltitol, sucrose, raffinose, hexylene glycol, 1,2-pentanediol, trehalose, etc. I can do it.
Among these, it is preferable to use glycerin, dipropylene glycol, polyethylene glycol, 1,3-butylene glycol, methyl gluceth-10, etc. in an appropriate combination.

In addition, the combination of polyhydric alcohol produces a warming effect that leads to brighter, more complex skin, and at the same time, its high moisturizing effect prevents makeup from fading due to dryness.

The amount of polyhydric alcohol blended in the cosmetic of the present invention is 20% by mass or more, preferably 20 to 80% by mass, and more preferably 30 to 70% by mass, based on the total amount of the cosmetic. If the amount of polyhydric alcohol blended is less than 20% by mass, a sufficient warm sensation during use cannot be obtained.

<Oil phase thickener>
The oil phase thickener used in the warming cosmetic composition of the present invention is one that can impart viscosity to the oil phase. Examples include emulsifying or non-emulsifying crosslinked siloxane elastomers, dextrin fatty acid esters, hydrophobized modified polysaccharides, fatty acids, waxes, and the like. Among these, in the present invention, from the viewpoint of suppressing stickiness, it is preferable to use a non-emulsifying crosslinked siloxane elastomer.

Examples of non-emulsifying crosslinked siloxane elastomers include, but are not limited to, methylpolysiloxane crosspolymer, methylphenylpolysiloxane crosspolymer, vinyl dimethicone/lauryl dimethicone crosspolymer, and lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl. Examples include dimethicone crosspolymer, alkyl (C30-45) cetearyl dimethicone crosspolymer, and cetearyl dimethicone crosspolymer. As these non-emulsifying crosslinked siloxane elastomers, those commercially available in the form of swollen products swollen with various oils such as silicone oil, mineral oil, triethylhexanoin, and squalane can be used. Specific examples include the following.

Examples of methylpolysiloxane crosspolymers include dimethicone crosspolymers such as 9040 silicone elastomer blend, 9041 silicone elastomer blend, 9045 silicone elastomer blend, EL-8040ID silicone organic blend (manufactured by Toray Dow Corning), KSG-15, Dimethicone/vinyl dimethicone crosspolymers such as KSG-16 and KSG-1610 (manufactured by Shin-Etsu Chemical Co., Ltd.), vinyl dimethicone/methicone silsesquioxane crosspolymers such as KSP-100 (manufactured by Shin-Etsu Chemical Co., Ltd.), Tospearl 150KA (manufactured by Momentive Performance Materials) and other polymethylsilsesquioxanes.

Examples of the methylphenylpolysiloxane crosspolymer include dimethicone/phenyl dimethicone crosspolymers such as KSG-18A (dimethicone/phenylvinyl dimethicone crosspolymer, manufactured by Shin-Etsu Chemical Co., Ltd.).

Examples of the vinyl dimethicone/lauryl dimethicone crosspolymer include KSG-41A, KSG-42A, KSG-43, and KSG-44 (all manufactured by Shin-Etsu Chemical Co., Ltd.).

Examples of the swollen product of lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl dimethicone crosspolymer include KSG-042Z and KSG-045Z (all manufactured by Shin-Etsu Chemical Co., Ltd.).

Examples of the alkyl (C30-45) cetearyl dimethicone crosspolymer include VELVESIL 125 and VELVESIL 034 (manufactured by Momentive Performance Materials).

Examples of the cetearyl dimethicone crosspolymer include VELVESIL DM (manufactured by Momentive Performance Materials).

The content of the oil phase thickener in the cosmetic of the present invention is more than 1.25% by mass and 15% by mass or less, preferably 1.26 to 12% by mass, more preferably 1.2% by mass or less, based on the total amount of the cosmetic. .27 to 10% by weight, more preferably 1.28 to 10% by weight. If the amount of oil phase thickener is less than 1.25% by mass, emulsion stability and usability tend to be poor, whereas if it is more than 15% by mass, stable cosmetics will be prepared. It may become difficult.

As the oil phase thickener of the present invention, one type or a combination of two or more types selected from the above-mentioned non-emulsifying crosslinked siloxane elastomers can be used.

<Emulsifier>
The emulsifier used in the warming cosmetic composition of the present invention is one that has relatively high lipophilicity and is capable of stabilizing the emulsion between the aqueous component and the oil component containing a high amount of polyhydric alcohol. In the present invention, polyether-modified silicones or organically modified clay minerals having specific properties are preferably used.

The polyether-modified silicone having the specific properties used as the emulsifier of the present invention has an HLB of 8.0 or less and a viscosity of 10,000 mm ² /s or more at 25°C, preferably 15, 000 mm ² /s or more, more preferably 20,000 mm ² /s or more. If the viscosity is less than 10,000 mm ² /s, good emulsion stability cannot be obtained.
Specific examples of polyether-modified silicones include PEG/PPG-19/19 dimethicone (trade name "BY11-030", HLB=3, viscosity 30,000 mm ² /s; manufactured by Dow Corning Toray).

The organically modified clay mineral used in the present invention is a type of colloidal hydrated aluminum silicate having a three-layer structure, and a clay mineral represented by the following general formula (1) is used as a quaternary ammonium salt type cationic surfactant. You can use the denatured version.
[Chemical formula 1]
(X, Y) _2-3 (Si, Al) ₄ O ₁₀ (OH) ₂ Z _1/3・nH ₂ O (1)
In the above formula, X is Al, Fe(III), Mn(III) or Cr(III), Y is Mg, Fe(II), Ni, Zn or Li, and Z is K, Na or Ca. be.

Specifically, natural or synthetic (in this case, the (OH) group in the formula is substituted with fluorine) montmorillonite group such as montmorillonite, saponite, hectorite (commercially available products include Veegum, Kunipia, Laponite, etc.); It is obtained by treating clay minerals such as sodium silicic mica and synthetic mica known as sodium or lithium taeniolite (commercially available products include Dymonite; manufactured by Topy Industries, Ltd.) with a quaternary ammonium salt type cationic surfactant. It will be done.

The quaternary ammonium salt type cationic surfactant used here is represented by the following general formula (2).
In the formula, R ¹ is an alkyl group having 10 to 22 carbon atoms or a benzyl group, R ² is a methyl group or an alkyl group having 10 to 22 carbon atoms, and R ³ and R ⁴ are an alkyl group having 1 to 3 carbon atoms or hydroxyalkyl. The group X represents a halogen atom or a methyl sulfate residue.

Examples of such quaternary ammonium salt type cationic surfactants include dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, aracyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium Chloride, Cetyldimethylethylammonium chloride, Stearyldimethylethylammonium chloride, Arakyldimethylethylammonium chloride, Behenyldimethylethylammonium chloride, Myristyldiethylmethylammonium chloride, Cetyldiethylmethylammonium chloride, Stearyldiethylmethylammonium chloride, Arakyldiethylmethylammonium Chloride, behenyldiethylmethylammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride, dibehenyldihydroxyethyl Examples include ammonium chloride and corresponding bromides, as well as dipalmitylpropylethylammonium methyl sulfate. In implementing the present invention, one or more of these may be arbitrarily selected.

Typical organically modified clay minerals include dimethyl distearyl ammonium hectorite (disteardimonium hectorite), dimethylalkylammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, and distearyl dimethyl ammonium chloride treated magnesium aluminum silicate. etc. Among these, dimethyldistearammonium hectorite is particularly preferred. Commercially available products include Bentone 27 (benzyldimethylstearylammonium chloride-treated hectorite: manufactured by Elementis Japan Co., Ltd.) and Bentone 38VCG (distearyldimethylammonium chloride-treated hectorite: manufactured by Elementis Japan Co., Ltd.).

The content of the emulsifier in the cosmetic composition of the present invention is 0.1 to 5% by mass, preferably 0.2 to 4% by mass, and more preferably 0.4 to 3% by mass, based on the total amount of the cosmetic composition. If the blending amount is less than 0.1% by mass, viscosity will be low and stability will be poor, and if the blending amount exceeds 5% by mass, stickiness and powderiness will occur due to the emulsifier, which is not preferable in terms of usability.

<Water>
In the warming cosmetic composition of the present invention, water (ion-exchanged water, purified water, natural water, etc.) can be blended as an aqueous solvent. However, the presence of an aqueous solvent reduces the warming effect, so when blending an aqueous solvent, 10% by mass or less, preferably 8% by mass or less, more preferably 5% by mass, based on the total amount of the warming cosmetic. % or less. Therefore, in the warming cosmetic of the present invention, the amount of water blended is 0.1 to 10% by mass, or 1 to 10% by mass, from the viewpoint of sufficiently dissolving the agent such as a whitening agent and providing a warming sensation. The content is preferably 0.1 to 8% by weight, or 1 to 8% by weight, and even more preferably 1 to 5% by weight.

<Whitening agent>
Conventional leave-on type warming cosmetics are non-aqueous, and it is difficult to incorporate water-soluble drugs into them.However, since the warming cosmetics of the present invention contain water, it is difficult to incorporate water-soluble drugs into them. It is characterized by being able to

The whitening agent to be blended is not particularly limited and may be any whitening drug that is commonly blended into cosmetics, but examples include ascorbic acid (vitamin C), tranexamic acid, kojic acid, ellagic acid, arbutin, and alkoxysalicylic acid. , and salts or derivatives thereof. More specific examples include sodium L-ascorbate, L-ascorbic acid ester magnesium salt, L-ascorbic acid glucoside, 2-O-ethyl-L-ascorbic acid, 3-O-ethyl-L-ascorbic acid, 4 - Methoxysalicylic acid sodium salt, 4-methoxysalicylic acid potassium salt, etc.
In the present invention, 4-methoxysalicylic acid potassium salt is preferably used.

Moreover, drugs other than whitening drugs can also be blended. Examples of drugs include vitamin A, vitamin A derivatives such as vitamin A palmitate and vitamin A acetate, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and its derivatives, vitamin B12, vitamin B15 and its Vitamin B derivatives, α-tocopherol, β-tocopherol, vitamin E such as vitamin E acetate, vitamin D, vitamin H, pantothenic acid, pantethine, etc.; γ-oryzanol, allantoin, glycyrrhizic acid (salt) ), saponins such as glycyrrhetinic acid, stearyl glycyrrhetinate, hinokitiol, bisabolol, eucalptone, thymol, inositol, saikosaponin, ginseng saponin, loofah saponin, muclodisaponin, various drugs such as pantothenylethyl ether, arbutin, cephalanthine, Squirrel, Clara, Kouhone, orange, sage, yarrow, mallow, Japanese commonweed, thyme, spruce, spruce, birch, horsetail, loofah, horse chestnut, saxifrage, scutellariae, arnica, lily, mugwort, peony, aloe, gardenia, cherry leaf, etc. Examples include plant extracts and pigments such as β-carotene.
The blending amount of the drug of the present invention is arbitrarily determined within the blending amount range that can be dissolved in the warming cosmetic. From the viewpoint of obtaining sufficient medicinal effects in cosmetics, the content is preferably 0.5 to 4% by mass, more preferably 1 to 3% by mass.

<Polyether modified silicone>
In the present invention, emulsion stability can be further improved by blending a polyether-modified silicone with an HLB of 8.0 or less and a viscosity of less than 10,000 mm ² /s at 25°C. Among these, those having no alkyl chain in the side chain and having a polyoxyalkylene group in the side chain of a linear or branched silicone skeleton are preferred.

Specific examples of polyether-modified silicones with a linear silicone skeleton include PEG-3 dimethicone (trade name "KF-6015", HLB=4.5, viscosity 150 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.); PEG-9 methyl ether dimethicone (trade name "KF-6016", HLB = 4.5, viscosity 150 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.), PEG-10 dimethicone (trade name "KF-6017P", HLB = 4) .5, viscosity 850 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.), PEG-12 dimethicone (product name "SH3772M", HLB = 6, viscosity 1,050 mm ² /s, product name "SH3773M", HLB = 8, viscosity 650mm ² /s, trade name "SH3775M", HLB = 5, viscosity 1,600mm ² /s; all of the above manufactured by Dow Corning Toray), PEG/PPG-20/22 butyl ether dimethicone (trade name "KF-6012") ", HLB=7.0, viscosity 1,600 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.

A specific example of a polyether-modified silicone having a branched silicone skeleton is PEG-9 polydimethylsiloxyethyl dimethicone (trade name "KF-6028", HLB=4, viscosity 900 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd. ), lauryl PEG-9 polydimethylsiloxyethyl dimethicone (trade name "KF-6038", HLB=3, viscosity 700 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.), cetyl PEG/PPG-10/1 dimethicone (trade name " KF-6048, HLB=3.5, viscosity 2,700 mm ² /s; manufactured by Shin-Etsu Chemical Co., Ltd.).

The amount of polyether-modified silicone in the cosmetic of the present invention is 0.1 to 10% by mass or less, preferably 0.3 to 6% by mass, more preferably 1 to 5% by mass based on the total weight of the cosmetic. be.

<Oil content>
The warming cosmetic composition of the present invention preferably contains an oil component in order to improve the feeling of use when applied to the skin. As the oil, any oil that can be used in ordinary cosmetics can be used without particular restriction.

For example, linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, kyonin oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil, rapeseed oil, Oils and fats such as sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, pentadecanoic acid, heptadecanoic acid , fatty acids such as nonadecanoic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, pentaerythritol tetraoctanoate, cetyl octoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, octyl palmitate , isopropyl isostearate, octyl isopalmitate, isodecyl oleate, cetyl ethylhexanoate and other esters, liquid paraffin, squalane, squalene, olefin oligomer, hydrogenated polydecene, paraffin, isoparaffin, octane, decane, dodecane, isododecane, hexadecane , hydrocarbons such as isohexadecane, higher alcohols such as octyl alcohol, isostearyl alcohol, and oleyl alcohol, linear silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, Examples include cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, and silicone oils such as caprylylmethicone.

In the cosmetic composition of the present invention, a combination of a plurality of the above-mentioned oils may be blended. The amount of oil blended is 10 to 50% by mass, more preferably 15 to 40% by mass, and more preferably 15 to 35% by mass, based on the total amount of the cosmetic. If the oil content is less than 10% by mass, it is difficult to emulsify due to the small amount of external oil phase, and the lightness and spreadability when applied to the skin will not be sufficiently achieved. In this case, since there is little internal water phase, viscosity is difficult to develop, and stability may be impaired.

<Other ingredients>
In addition to the above-mentioned ingredients, the warming cosmetic of the present invention may contain other ingredients commonly used in cosmetics, such as powder ingredients, ultraviolet protection agents, various aqueous solvents, and enhancers, as long as they do not impair the effects of the present invention. A sticky agent, a sequestering agent, a sugar, an amino acid, an organic amine, a pH adjuster, a stabilizer, a skin nutrient, an antioxidant, an antioxidant auxiliary agent, a fragrance, and the like may be added as appropriate.

The average emulsified particle diameter of the water droplets constituting the warming cosmetic of the present invention is preferably 10 μm or less, more preferably 5 μm or less. By reducing the average emulsion particle size of water droplets, emulsion stability is excellent.

The thermal cosmetic of the present invention has a hardness of 6 or more, preferably 8 or more, more preferably 10 or more, as measured at 25° C. using a rheometer (11.3 mmφ, 10 mm needle penetration). It may also be used in the form of a balm by using wax or the like. The emulsified cosmetic composition of the present invention having such hardness has excellent stability, and when filled into a jar, for example, it does not flow and maintains an appropriate hardness.

The warming cosmetic according to the present invention is characterized by being of a single layer type. The warming cosmetic according to the present invention has good emulsion stability even when water-soluble drugs are blended, is not sticky and has an excellent feeling of use even though it contains a high amount of humectant. has. Therefore, the warming cosmetics according to the present invention can be widely applied to cosmetics, such as milky lotions, serums, creams, massage cosmetics, sunscreen cosmetics, makeup bases, foundations, lipsticks, and blushers. It can be provided in any form such as , eye shadow, etc.

The warming cosmetic of the present invention can be produced by a conventional method. For example, the water phase component and the oil phase component are stirred and mixed, respectively, to prepare a uniform water phase portion and an oil phase portion, and the water phase portion is added to the oil phase portion while stirring and mixed.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples. The blending amounts are expressed in mass % unless otherwise specified. Prior to Examples, the evaluation method used in the present invention will be explained.

(1) Warming effect Practical use tests were conducted on the prepared samples by 10 expert panelists. Specifically, the prepared samples were applied to the faces of each panelist, and the thermal sensation was evaluated according to the following criteria.
<Evaluation criteria>
A: More than 8 expert panelists recognized that it has a warming effect.
B: 5 or more and less than 8 expert panelists recognized that there was a warming effect.
C: 3 or more but less than 5 expert panelists recognized that there was a warming effect.
D: Less than 3 expert panelists recognized that there was a warming effect.

(2) Stability After preparation, each sample was left at 0°C, 25°C, and 50°C for one month, then returned to room temperature, visually observed, and evaluated for the presence or absence of separation. Furthermore, the emulsified particle size of the water droplets after sample preparation was measured using a microscope. The smaller the average emulsion particle is, the better the emulsion stability is, and if it exceeds 10 μm, there is a high tendency for separation to be observed during long-term storage.

(3) Hardness Here, the above "hardness" was measured using a rheometer (manufactured by Fudo Kogyo Co., Ltd.) under conditions of needle diameter: 11.3 mmφ, penetration distance: 10 mm, and measurement temperature: 25°C.

(4) Usability Practical use tests were conducted on the prepared samples by 10 expert panelists. Specifically, the prepared sample was applied to the face of each panelist, and the non-stickiness, smoothness, and lightness of spread were evaluated according to the following criteria.
<Evaluation criteria>
A: Eight or more expert panelists recognized that it was excellent in usability.
B: 5 or more and less than 8 expert panelists recognized that the usability was excellent.
C: 3 or more and less than 5 expert panelists recognized that the usability was excellent.
D: Less than 3 expert panelists recognized that the usability was excellent.

[Examples 1 to 8, Comparative Examples 1 to 7]
Cosmetics were prepared according to the formulations shown in Tables 1 and 2 below, and their properties were evaluated according to the evaluation methods described above. The results are also shown in Tables 1 and 2.

^*1 KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)
^*2 DC9041 (manufactured by Toray Dow Corning)
^*3 Tospearl 150KA (manufactured by Momentive Performance Materials)
^*4 KSG-18A (manufactured by Shin-Etsu Chemical Co., Ltd.)
^*5 KSP-100 (manufactured by Shin-Etsu Chemical Co., Ltd.)
^*6 BY11-030 (manufactured by Toray Dow Corning)
^*7 Benton 38VCG (manufactured by Elementis Japan)
^*8 KF-6017P (manufactured by Shin-Etsu Chemical Co., Ltd.)
^*9 KF-6048 (manufactured by Shin-Etsu Chemical Co., Ltd.)
^*10 KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)

As shown in the results in the table, the composition (Example 1) containing a humectant, an oil phase thickener, and an emulsifier according to the present invention not only provides a sufficient warming effect but also has excellent emulsion stability. , there was no stickiness and the feeling of use was good. Furthermore, in the compositions of Examples 2 to 8, the whitening agent could be stably incorporated.

On the other hand, in compositions containing no oil phase thickener (Comparative Examples 1 to 3) and in cases where the amount of oil phase thickener blended is small (Comparative Examples 4 and 5), the stability significantly decreased and separation occurred. . Furthermore, a composition containing neither polyether-modified silicone with high viscosity nor organically modified clay mineral (Comparative Example 6) had significantly low stability. Furthermore, when the amount of water blended was large (Comparative Example 7), a sufficient warming effect could not be obtained.

Claims (5)

20 to 80% by mass polyhydric alcohol,
more than 1.25% by weight and not more than 15% by weight of an oil phase thickener;
emulsifier,
a polyether-modified silicone with a viscosity of less than 10,000 mm ² /s at 25°C , and
Contains 0.1 to 10% by mass of water,
The oil phase thickener is one or more selected from non-emulsifying crosslinked siloxane elastomer, dextrin fatty acid ester, hydrophobized modified polysaccharide, fatty acid, and wax,
A water-in-oil thermal cosmetic, wherein the emulsifier is one or more selected from polyether-modified silicone and disteardimonium hectorite having a viscosity of 10,000 mm ² /s or more at 25°C. The cosmetic according to claim 1, wherein the emulsifier is a polyether-modified silicone having a viscosity of 10,000 mm ² /s or more at 25°C. The cosmetic according to claim 1, wherein the emulsifier is disteardimonium hectorite. The cosmetic according to claim 1, wherein the oil phase thickener is a non-emulsifying crosslinked siloxane elastomer. The cosmetic according to claim 1, further comprising a whitening agent.