JP6343802B2 - Skin cleansing composition - Google Patents

Description

  The present invention relates to a skin cleansing composition having a good feeling of use and sufficient cleansing power.

Cleansing cosmetics are cosmetics used for the purpose of removing cosmetics that are difficult to remove by normal aqueous cleaning such as lip color and mascara and sebum stains. In recent years, the makeup components of makeup cosmetics have been diversified in order to improve the optical effect and the longevity of makeup, and there has been a demand for high cleansing power.
Liquid cleansing cosmetics are popular because they are easy to use in liquid form, and surfactant-based aqueous carrier solution types, high internal phase oil-in-water emulsified cleansing cosmetics, oil cleansing cosmetics, etc. are known. Yes.
However, the aqueous carrier solution type of surfactant has the advantage of good usability and a refreshing feeling after washing, but is inferior in cleansing power due to the low blending ratio of oily components. The high internal phase oil-in-water emulsified type has a high cleansing power and high usability because it contains a high amount of oily components, but has a poor refreshing feeling after washing. Oil cleansing cosmetics have high cleansing power by blending oil agents with high polarity, but are poor in usability due to high fluidity. Thus, conventional cleansing cosmetics do not always have satisfactory performance.

By the way, dosage forms having a bicontinuous emulsion structure in which an oil phase and an aqueous phase form a continuous phase have been adopted in various cosmetics such as makeup cosmetics and sunscreens (Patent Documents 1, 2 and the like). .
Since the bicontinuous microemulsion phase has a unique structure in which the oil phase and the aqueous phase form a continuous phase, it can contain a larger amount of oil and oily components than the micelle phase. Moreover, compared with a reverse micelle phase, a large amount of water and an aqueous component can be mix | blended. The composition that forms such a bicontinuous microemulsion structure has the property of being compatible with both water and oil and having a low interfacial tension. In addition, it has been reported that cleansing cosmetics exhibiting high detergency and good rinsing properties (Patent Documents 3 to 8, etc.).
The bicontinuous microemulsion phase is an isotropic liquid and can be said to be a thermodynamically very stable phase state. However, since it is subject to strict restrictions such as the type and blending amount of oil and aqueous components, the region that can exist as a bicontinuous microemulsion phase is very narrow on the three-component phase equilibrium diagram of water / oil / surfactant, It is generally considered difficult to formulate.

  In recent years, examples of blending silicone oils into cosmetics have been seen (Patent Documents 9, 10, etc.). This is because a silicone oil agent has a lighter feel than other oil agents, and therefore can impart a refreshing feeling to use and goodness to a cosmetic.

JP 2012-67049 A JP 2011-178769 A Japanese Patent No. 4638669 JP 2004-217640 A JP 2005-194249 A JP 2007-77302 A JP 2009-196909 A JP 2010-280644 A JP 2013-028745 A JP 2013-018765 A

The inventors of the present application paid attention to the fact that when a cleansing cosmetic material having a good feeling of use is developed, a light and refreshing feeling can be obtained if a silicone oil is blended. We also paid attention to the fact that conventional cosmetics such as lip colors and mascaras, which are difficult to remove with cleansing cosmetics, contain ingredients that are difficult to dissolve in oils that are usually blended in cosmetics but are soluble in silicone oils. .
However, since silicone oils are generally incompatible with cosmetics and sebum, a so-called silicone-rich composition containing a large amount of silicone oils has a problem that sufficient cleansing power is difficult to obtain.
In view of such a situation, an object of the present invention is to provide a stable skin cleansing composition having both a good usability and a sufficient cleansing power.

  As a result of intensive studies to solve the above problems, the inventors of the present invention are able to obtain a skin cleansing composition having a high cleansing power by incorporating a specific surfactant in a silicone-rich composition. I found. In particular, it has been found that the use of a specific surfactant broadens the area where the composition can form a bicontinuous emulsion structure, and even a silicone-rich composition has high stability and can impart high cleansing power. The present invention has been completed.

That is, the present invention is as follows.
[1] A composition comprising an oily component, an aqueous component, and one or more surfactants,
Containing at least 50% by weight of the oil component and at least 10% by weight of the total composition, and at least one of the surfactants is a polyhydric alcohol, a polyhydric alcohol polymer or a polyhydric alcohol poly A skin cleansing composition, which is an ester compound of an oxyalkylene adduct and stearic acid or isostearic acid.
[2] The skin cleansing composition according to [1], which has a bicontinuous emulsion structure.
[3] The skin cleansing composition according to [1] or [2], wherein the silicone oil agent is represented by the following general formula (1).

（式（１）中、Ｒ₁は独立して、水素原子、及び炭素数１〜３のアルキル基から選択される。Ｒ₂は独立して、水素原子、炭素数１〜８のアルキル基、及びフェニル基から選択さ
れる。Ｒ₃は水素原子、炭素数１〜３のアルキル基、フェニル基、及びトリメチルシロキシ基から選択される。ｎ、ｍは整数である。）

(In formula (1), R ₁ is independently selected from a hydrogen atom and an alkyl group having 1 to 3 carbon atoms. R ₂ is independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, And R ₃ is selected from a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, a phenyl group, and a trimethylsiloxy group, and n and m are integers.)

[4] The skin cleansing composition according to [1] to [3], wherein the aqueous component contains a mono- or polyhydric alcohol having 1 to 6 carbon atoms, polyethylene glycols, polypropylene glycols or saccharides. .

  According to the present invention, it is possible to provide a stable skin cleansing composition having both good usability and sufficient cleansing power.

An example of the phase equilibrium diagram showing the selection method of surfactant in the case of design of the composition for skin washing | cleaning of this invention. (SAA: surfactant, Lα: lamellar liquid crystal phase) An example of the phase equilibrium diagram of the oil phase / water phase / surfactant phase showing the design method of the composition for skin cleansing of this invention. (SAAs: surfactant, Lα: lamellar liquid crystal phase, L2: soluble phase, O / W: oil-in-water emulsion phase, D: bicontinuous microemulsion phase)

  The skin cleansing composition of the present invention contains an oily component, an aqueous component, and one or more surfactants, and is a silicone containing 50% by weight or more of the oily component and 10% by weight or more of the whole composition. It is a silicone-rich composition containing an oil agent. Further, at least one of the surfactants is an ester compound of a polyhydric alcohol, a polyhydric alcohol polymer or a polyhydric alcohol polyoxyalkylene adduct and stearic acid or isostearic acid.

  In designing the skin cleansing composition of the present invention, the present inventors searched for a surfactant suitable for a silicone-rich composition based on the following concept. Referring to FIG. 1, the surfactant is selected from those that form a lamellar liquid crystal (Lα) phase in a wide range (for example, 30 to 90% by weight of surfactant) in a simple two-component system with water. Furthermore, when combining two types of surfactants, the surfactants that form lamellar liquid crystal (Lα) phases in a simple two-component system with water can be combined at any ratio in a certain total concentration. A compound that reproducibly expresses a lamellar liquid crystal (Lα) phase is selected in combination with an appropriate aqueous component content (for example, 15 to 50% by weight) having a relatively low activator concentration. By using the surfactant selected in this way in the silicone-rich composition, the region for forming the bicontinuous emulsion structure can be expanded.

  One or more surfactants are contained in the skin cleansing composition of the present invention, at least one of which is a polyhydric alcohol, a polyhydric alcohol polymer, or a polyhydric alcohol polyoxyalkylene adduct. And an ester compound of stearic acid or isostearic acid.

Here, examples of the polyhydric alcohol include ethylene glycol, propylene glycol, isoprene glycol, 1,3-butylene glycol, hexylene glycol, trimethylolpropane, glycerin, diglycerin, and sorbit. Examples of the polyhydric alcohol polymer include polyethylene glycol, polypropylene glycol, polyisoprene glycol, polyglycerin and the like. Examples of the polyhydric alcohol polyoxyalkylene adduct include polyoxyethylene glyceryl, polyoxypropylene glyceryl, polyoxyethylene sorbitan and the like.
The molecular weight of the polyhydric alcohol, polyhydric alcohol polymer or polyhydric alcohol polyoxyalkylene adduct portion of the ester compound which is a surfactant is preferably 50 to 7000. Moreover, it is preferable that the polymerization degree of a polyhydric alcohol polymer or a polyhydric alcohol polyoxyalkylene adduct is 1-150.

The hydrophobic portion of the ester compound that is a surfactant is stearic acid or isostearic acid, more preferably isostearic acid. This is because the melting point of the ester compound is very low due to the bulky structure of the hydrophobic portion, and a stable liquid composition can be obtained in a wide temperature range (about 5 to 50 ° C.).
Isostearic acid is not particularly limited, but 2-heptylundecanoic acid, 2-isoheptylisoundecanoic acid and the like are preferable.

  The ester compound of the above polyhydric alcohol, polyhydric alcohol polymer or polyhydric alcohol polyoxyalkylene adduct, and stearic acid or isostearic acid may be any of monoester, diester, and triester. Is particularly preferred. Specifically, although not particularly limited, glyceryl stearate, glyceryl isostearate, diglyceryl stearate, diglyceryl isostearate, tetraglyceryl stearate, decaglyceryl stearate, sorbitan monostearate, sorbitan monoisostearate, monostearate Polyoxyethylene glyceryl acid, polyoxyethylene glyceryl monoisostearate, polyoxyethylene glyceryl triisostearate, polyethylene glycol monostearate, glyceryl diisostearate, diglyceryl diisostearate, triglyceryl diisostearate, polyalkylene glycol diisostearate, triisostearate Polyoxyethylene glyceryl acid, polyoxyethylene monostearate Sorbitan tristearate polyoxyethylene sorbitan triisostearate, polyoxyethylene sorbitan monoisostearate acids PEG- glyceryl distearate PEG- glyceryl triisostearate PEG- glyceryl, and the like.

  In the present invention, the surfactant content is preferably 10 to 70% by weight, more preferably 15 to 60% by weight, and still more preferably 20 to 50% by weight of the total composition. By containing in such a range, it becomes possible to make the cleansing power of the composition for skin cleaning higher.

In the present invention, one or more surfactants can be used. Further, in the composition for cleaning the skin of the present invention, as the surfactant, other than the ester compound of the aforementioned polyhydric alcohol, polyhydric alcohol polymer or polyhydric alcohol polyoxyalkylene adduct and stearic acid or isostearic acid. A surfactant may also be included. However, in that case, it is preferable that the ester compound of polyhydric alcohol, polyhydric alcohol polymer or polyhydric alcohol polyoxyalkylene adduct and stearic acid or isostearic acid occupy 30% by weight or more of the entire surfactant. More preferably, it is 40% by weight or more, and further preferably 50% by weight or more.
In the present invention, the HLB of the surfactant (when two or more surfactants are contained, the total HLB of the surfactant) is preferably 6.5 to 13.5, and more preferably 8 to 12. More preferred. By using a surfactant having an HLB in this range, the bicontinuous emulsion structure to be described later can be further stabilized, and the cleansing power of the skin cleansing composition can be increased and maintained.

  The skin cleansing composition of the present invention usually has an oil-in-water emulsion in which micelle solubilizes oil, a water-in-oil emulsion in which reverse micelle solubilizes water, and the association number of surfactant molecules becomes infinite. The oil phase and the water phase take any structure of a bicontinuous emulsion structure in which a continuous phase is formed. The properties of these emulsions are transparent or translucent appearance, and are one-phase solutions in which all the components to be blended are uniformly dissolved.

Of these, the skin cleansing composition of the present invention preferably has a bicontinuous microemulsion structure. Bicontinuous microemulsion phase is commonly referred to, middle phase microemulsion phase, bicontinuous phase, a sponge phase, L ₃ phase, also like D phase. The bicontinuous microemulsion has a structure in which the association number of surfactant molecules becomes infinite and the oil phase and the water phase form a continuous phase. It has both of the characteristics of both the good washing of the type microemulsion and the cleansing power of the W / O type microemulsion that forms a continuous phase of oil. In other words, it has a property that it is easily compatible with both water and oil and has a low interfacial tension, so it uses this to show a high cleansing power for both oil-soluble and water-soluble stains, giving you a refreshing feeling after washing. It can be set as the skin cleaning composition with the favorable usability | use_condition obtained.

When the skin cleansing composition of the present invention has a bicontinuous emulsion structure, its appearance is transparent, optically isotropic, and exhibits a highly viscous gel. For this reason, the appearance and beauty of the skin cleansing composition can be obtained, so that the selection of the design of the container for containing the skin cleansing composition is wide, and the user can be given an aesthetic appearance.
Whether or not it has a bicontinuous emulsion structure can be determined by conventional methods, such as judgment by appearance, creation of phase equilibrium diagram, electrical conductivity measurement, measurement of self-diffusion coefficient by NMR, small angle X-ray scattering, freeze fracture method Can be discriminated by observing a replica prepared using an electron microscope.

In general, it is said that a bicontinuous emulsion structure is very difficult to search for a combination of compounds satisfying the generation conditions, and the generation range is extremely narrow.
The present inventors have found that a stable bicontinuous emulsion structure can be formed by using the aforementioned surfactant in a system using a silicone-rich composition as an oil agent. The skin cleansing composition of the present invention exhibits a high cleansing power by containing a specific surfactant and has a stable bicontinuous emulsion structure, and also exhibits property stability and cleansing with respect to temperature changes and changes over time. The effect of maintaining power can be obtained.

When the skin cleansing composition of the present invention has a bicontinuous microemulsion structure, it can be designed according to the following concept, for example.
Referring to FIG. 2, first, an oil component that is compatible with the surfactant phase is selected. Next, when the aqueous phase is a small amount (for example, 1 to 10% by weight), it becomes a phase state that can be solubilized (L2 phase), and the composition of the composition converges in the direction of the top of the aqueous phase of the ternary phase equilibrium diagram The content of the oil component is selected so as to pass through the lamellar liquid crystal (Lα) phase. Furthermore, when the composition of the composition is converged in the direction of the top of the aqueous phase, it is retained as a preparation at a point (for example, an asterisk in FIG. 2) that passes through the bicontinuous microemulsion phase (D phase) and becomes a transparent one liquid phase.

In the skin cleansing composition of the present invention, 50% by weight or more of the oily component contained is a silicone oil, preferably 50% by weight or more and 100% by weight or less of the oily component, more preferably 60% by weight or more and 100% of the oily component. The silicone oil agent is 70% by weight or more and 100% by weight or less of the oil component, more preferably 70% by weight or less. The skin cleansing composition of the present invention contains 10% by weight or more of the silicone oil agent of the whole composition, preferably 10% to 50% by weight of the whole composition, more preferably 15% of the whole composition. The silicone oil agent is contained in an amount of from 45% by weight to 45% by weight, more preferably from 20% by weight to 40% by weight of the total composition.
The skin cleansing composition of the present invention has a silicone-rich composition, so that a light and refreshing feel is obtained when placed on the skin, and the elongation on the skin is good.

The silicone oil contained in the skin cleansing composition of the present invention is not particularly limited. For example, a silicone oil that is liquid at 25 ° C. and 1 atm is preferable. Here, liquid at 25 ° C. and 1 atm is preferably a viscosity measured at 25 ° C. and 1 atm of 100 mPa · s or less, more preferably 80 mPa · s or less, more preferably 50 mPa · s or less. It is. By using such an oil agent, the composition for cleaning the skin extends with a light touch on the skin, so that a good usability can be easily obtained.
Further, the weight average molecular weight of the silicone oil contained in the skin cleansing composition of the present invention is preferably 150 or more, more preferably 200 or more, and further preferably 230 or more. Moreover, it is preferably 5000 or less, more preferably 4000 or less, and even more preferably 3000 or less, and a low molecular weight is preferred because it tends to be highly compatible with cosmetics and sebum. By using an oil agent having such a molecular weight range, the skin cleansing composition is stretched with a light touch on the skin, and a clean feeling can be obtained when washed away, so that a good feeling of use is easily obtained.

  As the silicone oil agent contained in the skin cleansing composition of the present invention, a silicone having a linear or cyclic carbon skeleton substituent (alkyl-modified silicone) is preferable, for example, represented by the following general formula (1). Those having a structure are preferably mentioned.

In Formula (1), R ₁ is independently selected from a hydrogen atom and an alkyl group having 1 to 3 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms, and more preferably a methyl group. R ₂ is independently selected from a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, and a phenyl group, and preferably an alkyl group having 1 to 8 carbon atoms. R ₃ is selected from a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, a phenyl group, and a trimethylsiloxy group. n and m are integers.
Examples of the silicone oil represented by the general formula (1) include caprylyl methicone, methylphenyl polysiloxane, diphenyl polysiloxane, dimethyl polysiloxane, diphenylsiloxyphenyl trimethicone, etc., and particularly refreshing feel and good elongation. From this point of view, caprylyl methicone and diphenylsiloxyphenyl trimethicone are preferred. In addition, a silicone oil agent may be 1 type, or may use 2 or more types.

The skin cleansing composition of the present invention contains an aqueous component as an essential component, but most of it is usually water.
The content of the aqueous component contained in the skin cleansing composition of the present invention is preferably 5 to 70% by weight, more preferably 10 to 60% by weight, and still more preferably 15 to 50% by weight of the entire composition.

  The skin cleansing composition of the present invention preferably further contains a monovalent or polyvalent alcohol having 1 to 6 carbon atoms, polyethylene glycols, polypropylene glycols, or saccharides as an aqueous component. By containing these, when the skin cleansing composition has a bicontinuous emulsion structure, the structure can be further stabilized, and the cleansing power of the skin cleansing composition can be maintained high.

Examples of the monohydric alcohol having 1 to 6 carbon atoms include ethanol, propanol, isopropanol, butanol, isobutanol, and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, isoprene glycol, 1,3-butylene glycol, Examples include hexylene glycol, trimethylolpropane, glycerin, diglycerin, and sorbit.
As the polyethylene glycols or polypropylene glycols, polyethylene glycols having a molecular weight of 1000 or less or polypropylene glycols having a molecular weight of 200 or less can be used, and examples thereof include diethylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, and diethylene glycol monobutyl ether. . Of these, diols having a molecular weight of 200 or less are particularly preferable, and propylene glycol, 1,3-butylene glycol, dipropylene glycol, and diethylene glycol are particularly preferable.
Examples of the saccharide include erythritol, pentaerythritol, methyl glucoside, ethyl glucoside, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside and the like, and alkyl glucosides having 2 or less carbon atoms in the alkyl chain are particularly preferable. Among these, methyl glucoside, ethyl glucoside, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, particularly polyoxyethylene methyl glucoside and polyoxypropylene methyl glucoside are preferable.

  1 type, or 2 or more types can be used for C1-C6 monohydric or polyhydric alcohol, polyethyleneglycol, or polypropyleneglycol. Moreover, the content is preferably 0.01 to 70% by weight of the whole composition, more preferably 0.01 to 60% by weight, and still more preferably 0.01 to 50% by weight. By containing in such a range, the bicontinuous emulsion structure of the composition for skin cleansing can be further stabilized and high cleansing power can be maintained.

The skin cleansing composition of the present invention can contain, in addition to the above components, optional components that are usually used in cosmetics as long as the effects of the present invention are not impaired. Examples of such optional ingredients include macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, and hardened coconut oil. Oils such as hardened oil, mole, hardened castor oil, beeswax, candelilla wax, carnauba wax, ibotarou, lanolin, reduced lanolin, hard lanolin, jojoba wax, waxes;
Hydrocarbons such as liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, microcrystalline wax, higher fatty acids such as oleic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid;
Higher alcohols such as cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol;
Isononyl isononanoate, cetyl isooctanoate, isopropyl myristate, hexyl decyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, dicapric acid Neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, triisostearic acid trimethylolpropane, tetra-2-ethylhexanoic acid pentane erythritol Synthetic ester oils such as
Anionic surfactants such as fatty acid soap (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, alkylsulfuric acid triethanolamine ether;
Cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, laurylamine oxide;
Betaine surfactants (alkyl betaines, amide betaines, sulfobetaines, etc.), imidazoline amphoteric surfactants (such as 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt), acylmethyl taurine Amphoteric surfactants such as;
Sorbitan fatty acid esters (such as sorbitan monostearate and sorbitan sesquioleate), glycerin fatty acids (such as glyceryl monostearate), propylene glycol fatty acid esters (such as propylene glycol monostearate), hydrogenated castor oil derivatives, glycerin alkyl ether , POE sorbitan fatty acid esters (POE sorbitan monooleate, polystearic acid polyoxyethylene sorbitan, etc.), POE sorbite fatty acid esters (POE-sorbitol monolaurate, etc.), POE glycerin fatty acid esters (POE-glycerin monoisosteare) Rate), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octylide) Sil ethers, etc.), POE alkyl phenyl ethers (POE nonyl phenyl ether, etc.), Pluronic types, POE / POP alkyl ethers (POE / POP2-decyl tetradecyl ether, etc.), Tetronics, POE castor oil / cured castor Nonionic surfactants such as oil derivatives (POE castor oil, POE hydrogenated castor oil, etc.), sucrose fatty acid esters, alkyl glucosides;
Polyethylene glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexylene glycol, 1 Polyhydric alcohols such as 1,2-hexanediol and 1,2-octanediol;
Moisturizing ingredients such as sodium pyrrolidonecarboxylate, lactic acid, sodium lactate;
Gua gum, quince seed, carrageenan, galactan, arabic gum, pectin, mannan, starch, xanthan gum, curdlan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, chondroitin sulfate, dermatan sulfate, glycogen, heparan sulfate, hyaluronic acid, Sodium hyaluronate, gum tragacanth, keratan sulfate, chondroitin, mucoitin sulfate, hydroxyethyl guar gum, carboxymethyl guar gum, dextran, kerato sulfate, locust bean gum, succinoglucan, carolinic acid, chitin, chitosan, carboxymethyl chitin, agar, polyvinyl alcohol , Polyvinylpyrrolidone, carboxyvinyl polymer, alkyl-modified carboxyl Vinyl polymers, sodium polyacrylate, polyethylene glycol, bentonite thickener;
Mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, anhydrous silicic acid (silica), aluminum oxide, barium sulfate, etc. may be treated, and the surface may be treated. , Bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide inorganic pigments;
The surface may be treated, pearl agents such as titanium mica, fish phosphorus foil, bismuth oxychloride, red 202, red 228, red 226, yellow 4 and blue 404 which may be raked. No. 5, Yellow No. 5, Red No. 505, Red No. 230, Red No. 223, Orange No. 201, Red No. 213, Yellow No. 204, Yellow No. 203, Blue No. 1, Green No. 201, Purple No. 201, Red No. 204, etc. Organic pigments of
Organic powders such as polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer;
Lower alcohols such as ethanol and isopropanol;
Vitamin A or derivatives thereof, vitamin B ₆ hydrochloride, vitamin B ₆ tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ or derivatives thereof, vitamin Bs such as vitamin B ₁₂ , vitamin B ₁₅ or derivatives thereof, α-tocopherol , Β-tocopherol, γ-tocopherol, vitamin E such as vitamin E acetate, vitamin D, vitamin H, pantothenic acid, panthetin, vitamins such as pyrroloquinoline quinone, and the like.

The skin cleansing composition of the present invention can be applied to the face or lips. In particular, it can be suitably used for washing the face or lips to which various makeup cosmetics such as foundation, lip color and mascara are applied.
Moreover, although it can be used in any aspect for rinsing or wiping, it is preferable to use in the aspect for rinsing because a refreshing feeling can be obtained after rinsing.

  The skin cleansing composition of the present invention can be suitably produced according to a conventional method, and the production method is not particularly limited. For example, a surfactant is dissolved in an aqueous component and the mixture is heated to 50 to 70 ° C. It can be manufactured by warming, slowly adding the oil component and stirring and mixing, and then cooling to room temperature. Alternatively, an aqueous component that is uniformly mixed is added to an oily component and a surfactant that are uniformly mixed at 50 to 70 ° C. by heating and stirring. It can also be produced by cooling to a low temperature.

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the summary is exceeded.

According to the prescription in Table 1 below, the skin cleansing compositions of the present invention (Examples 1 to 6 ) and Comparative Examples 1 to 10 were prepared. That is, the component (a) and the component (b) were heated to 50 ° C. and mixed with stirring to obtain a uniform solution. Thereafter, the component (c) is stirred and mixed to obtain a homogeneous solution, which is gradually added to the homogeneous solution of the component (b) and the component (b) while continuing to stir while heating at 50 ° C., and then to room temperature. After cooling, a skin cleansing composition was obtained.
In addition, the number in a table | surface represents weight%.
Further, the phase state of the prepared skin cleansing composition was confirmed using a polarizing microscope (OLYMPUS BX51), a small-angle X-ray diffractometer (PANalytical X'Pert PRO MRD), and further appearance evaluation. The results are shown in Table 1.

<Test Example 1> Evaluation of cleansing power After applying a cream foundation on the inner part of the forearm that was measured in advance, each of the compositions for Examples 1 to 6 and Comparative Examples 1 to 10 was applied to the application site. Then, after rubbing 10 times to draw a circle, it was rinsed with running water for 10 seconds. After lightly wiping off the moisture with a towel, the washed part was measured for color, and the difference from the colorimetric value before applying the cream foundation, ΔE, was calculated. The results are shown in Table 1. A smaller value of ΔE indicates a higher cleansing force.

<Test Example 2> Evaluation of storage stability The skin cleansing compositions of Examples 1 to 6 and Comparative Examples 1 to 10 were allowed to stand at 5 ° C, 20 ° C, or 50 ° C for 3 months to change the appearance. Was visually observed and evaluated according to the following criteria. The results are shown in Table 1.
No change at all temperatures ...
Only slightly turbid at 5 ° C and 50 ° C
Much turbidity only at 5 ° C and 50 ° C ...
Much cloudy even at 20 ℃ ...

<Test Example 3> Evaluation of the refreshing feeling after washing The forearm inner part to which the cream foundation has been applied in advance was washed with the skin cleaning compositions of Examples 1 to 6 and Comparative Examples 1 to 10 , and the refreshing feeling after washing was as follows. It was evaluated by. Evaluation was carried out by five skilled persons, and the average value of the five persons was used as the evaluation value for the refreshing feeling of the skin cleansing composition. The results are shown in Table 1.
Evaluation criteria Compared with the skin cleanser composition of Comparative Example 9 , the refreshing feeling after washing is
Excellent ... 5 points Excellent ... 4 points Equivalent ...・ ・ ・ ・ 3 points Inferior ・ ・ ・ ・ ・ ・ ・ ・ ・ 2 points

  According to the present invention, a stable skin cleansing composition having both good usability and sufficient cleansing power can be provided, which is very useful industrially.

Claims (2)

A composition comprising an oily component, an aqueous component, and one or more surfactants,
Containing 50% by weight or more of the oily component and 10% by weight or more of the total amount of the silicone oil,
At least one of the surfactants is an ester compound of polyhydric alcohol, polyhydric alcohol polymer or polyhydric alcohol polyoxyalkylene adduct, and stearic acid or isostearic acid;
The content of the aqueous component is 5 to 70% by weight of the entire composition,
The surfactant content is 10 to 70% by weight of the total composition,
The silicone oil is selected from the group consisting of caprylyl methicone, methylphenyl polysiloxane, diphenyl polysiloxane, dimethyl polysiloxane, and diphenylsiloxyphenyl trimethicone, and has a bicontinuous emulsion structure. , Skin cleansing composition. The composition for skin cleansing according to claim 1, wherein the aqueous component contains a mono- or polyhydric alcohol having 1 to 6 carbon atoms, polyethylene glycols, polypropylene glycols, or saccharides.

Images