HK1164141B - External preparation for skin - Google Patents

Description

External preparation for skin

Technical Field

The present invention relates to an external preparation for skin, which contains a wax finely dispersed composition obtained by finely dispersing a wax in an aqueous dispersion medium in a solid to semisolid state. More specifically, the present invention relates to an external preparation for skin which is stable and has an excellent skin tightening effect after use. The present invention also relates to an external preparation for skin which is excellent in stability and an effect of imparting a firm feeling to the skin after use, is also excellent in a feeling of being attached to the skin, and is free from a sticky feeling.

Background

In anti-aging cosmetics and the like, a sense of touch that enables a cosmetic effect to be quickly perceived is important for a sense of tightness after use. Conventionally, a technique of imparting a firm feeling by a water-soluble polymer such as polyvinyl alcohol has been frequently used, but satisfactory effects are not necessarily obtained, and further improvement of the firm feeling is required. In addition, as cosmetics, cosmetics which are excellent in the feeling of adhesion to the skin in addition to the feeling of firmness and which are free from the feeling of stickiness are more desired.

Prior art documents disclosing techniques related to the present invention are described below.

That is, as shown in patent documents 1 to 3, the present applicant has proposed the following techniques: in order to eliminate the drawbacks of stickiness and glare caused by the incorporation of wax into cosmetics, a wax finely dispersed composition is obtained which has the above-mentioned drawbacks eliminated and is excellent in stability and safety by finely dispersing wax in a solvent and using the wax as a wax emulsion. However, the wax finely dispersed compositions described in patent documents 1 to 3 are applied to hair cosmetics and polishes such as hair fixatives and hair mousses in order to utilize the effects of polishing and shape retention of the wax itself, and there is no description or suggestion in these patent documents that the improvement of the skin firmness after use as in the present invention is achieved. Further, there is no description or suggestion that the feeling of use without stickiness and the feeling of adhesion to the skin can be obtained.

Patent documents 4 to 5 also describe hair cosmetic compositions containing wax microdispersions, but the techniques disclosed in these patent documents 4 to 5 are also applied to hair cosmetics such as hair fixatives and hair mousses, and polishes in order to utilize the effects of the wax itself, such as polishing and shape retention, and do not describe and suggest that the skin can be perceived to have a firm feeling after use as in the present invention. Further, there is no description or suggestion that the feeling of use without stickiness and the feeling of adhesion to the skin can be obtained.

Patent document 6 describes an invention relating to a wax dispersion liquid containing a wax phase containing a specific oil component or wax component and an aqueous phase, and having an average particle diameter of 0.5 to 100 μm. However, if the particle size is large, stability during long-term storage may be concerned. Further, since the wax dispersion is applied to a base material such as tissue paper (tissue paper) for producing wet tissues and dry tissues, it is not described and suggested that the wax dispersion is added to a skin external preparation to improve the feeling of firmness of the skin after use, to improve the usability without feeling of stickiness, and to realize the feeling of adhesion to the skin. Patent document 6 does not describe the mass ratio of nonionic surfactant/wax, and all of the wax dispersions shown in examples (table 1. [0081]) have only compositions in which the ratio of nonionic surfactant/wax is less than 1.0.

Patent document 7 describes an invention relating to a pearl foil wax containing 30 to 60 mass% of a wax composed of amorphous and crystalline components, 5 to 20 mass% of a nonionic surfactant and/or an amphoteric surfactant, and water added as needed. That is, the mass ratio of the nonionic surfactant/wax in the invention of patent document 7 is less than 1.0. Patent document 7 does not describe and suggest a step of heating to a temperature not lower than the melting point of the wax and within the melting temperature range to obtain a molten state in the production of the pearl foil wax, and does not describe and suggest the dispersion of extremely fine wax particles having a particle diameter of 500nm or less. In the example of patent document 7, the fine crystallized wax particles in the dispersion have a large particle size of 12 μm to 13 μm (table 1 of [0077 ]), and it is described in the background art that pearl foil wax generally needs to have a particle size of 5 to 60 μm ([0002 ]).

Patent document 8 describes an invention relating to the following means: a self-emulsifying base comprising an anhydrous wax mixture and an anionic or nonionic emulsifier having an HLB of 10 or more (claim 8); and the use of the above anhydrous wax mixture, self-emulsifying base for viscosity enhancement in emulsions, particularly oil-in-water emulsions (claims 13, 14). However, patent document 8 does not describe and suggest a step of heating to a melting point or higher and a melting temperature range of the wax to obtain a molten state in the production of the base, and does not describe and suggest dispersion of extremely fine wax particles having a particle diameter of 500nm or less. In the examples of patent document 8, the test examples using a nonionic surfactant as an emulsifier are only those shown in tables 5 to 7, but the mass ratio of "nonionic surfactant/wax" in all the test examples is less than 1.0([0057] to [0059 ]).

It is known that when a fluid oil or a solid-semisolid wax is added as an oil to an O/W emulsion composition (cream, emulsion, etc.), the emulsion has poor stability when the proportion of the solid-semisolid wax is large, and when the proportion of the fluid oil is large, the solid-semisolid wax is hard to feel the sticky feeling caused by the solid-semisolid wax, and it is difficult to achieve both stability and usability (sticky feeling, non-sticky feeling, etc.).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 10-324617

Patent document 2: japanese laid-open patent publication No. 11-286418

Patent document 3: japanese laid-open patent publication No. 11-263915

Patent document 4: japanese laid-open patent publication No. 4-230616

Patent document 5: japanese laid-open patent publication No. 3-2112

Patent document 6: japanese Kokai publication No. 2006-516029

Patent document 7: japanese Kokai publication Hei-2004-523519

Patent document 8: japanese Kokai publication No. 2007-531777

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide an external skin preparation which is stable and has an excellent skin firming effect after use. The present invention also provides an external preparation for skin which is excellent in stability and skin-tightening effect after use, has excellent skin-tightening feeling, and is free from stickiness.

Means for solving the problems

The present inventors have conducted extensive studies to solve the above problems, and as a result, have found that the wax finely dispersed composition obtained by the following method is stable and has an excellent feeling in use, thereby completing the present invention. The method comprises the following steps: in the production of a composition obtained by finely dispersing a wax (particularly a natural wax such as carnauba wax or candelilla wax) which is solid or semi-solid at room temperature in an aqueous dispersion medium, the composition is preferably produced under specific heating conditions, while containing a specific thickener or the like, and adjusting the mixing ratio of the wax and the nonionic surfactant to a specific range.

Specifically disclosed is an external skin preparation which is characterized by containing a wax finely dispersed composition obtained by finely dispersing a wax in an aqueous dispersion medium in a solid-to-semisolid state, wherein the wax finely dispersed composition contains a wax that is solid-to-semisolid at normal temperature, a nonionic surfactant, an aqueous dispersion medium and an ionic water-soluble thickener, the mass ratio of nonionic surfactant/wax is 1.0 or more, the particle size of the finely dispersed wax is 500nm or less, and the external skin preparation contains substantially no ionic surfactant.

The present invention also provides the external preparation for skin, further comprising a silicone oil and/or a fluorine oil which is liquid at room temperature in the wax finely dispersed composition.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention provides an external preparation for skin which is stable and has an excellent skin-tightening effect after use. Further, the present invention provides an external preparation for skin which is excellent in stability and an effect of imparting a firm feeling to the skin after use, is excellent in a feeling of being attached to the skin, and is free from a sticky feeling.

Detailed Description

The present invention will be described in detail below.

In the following description, POE means polyoxyethylene and POP means polyoxypropylene.

[ wax finely dispersed composition ]

One embodiment of the wax finely dispersed composition used in the external preparation for skin of the present invention is a wax finely dispersed composition containing a wax which is solid to semisolid at normal temperature, a nonionic surfactant, an aqueous dispersion medium, and a water-soluble thickener, in which the wax is finely dispersed in the aqueous dispersion medium in a solid to semisolid state.

Another embodiment of the wax finely dispersed composition for use in the external preparation for skin of the present invention is a wax finely dispersed composition containing a wax which is solid to semisolid at normal temperature, a nonionic surfactant, an aqueous dispersion medium, a water-soluble thickener, and a silicone oil and/or fluorine oil component which is liquid at normal temperature, wherein the wax is finely dispersed in the aqueous dispersion medium in a solid to semisolid state.

< waxes >

The wax used in the present invention is solid to semisolid at room temperature, and specific examples thereof include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, white wax, spermaceti wax, montan wax, Rice bran wax (Rice bran wax), kapok wax, wood wax, acetylated lanolin, liquid lanolin, sugar cane wax, isopropyl lanolate fatty acid ester, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, beeswax, microcrystalline wax, paraffin wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyglycol ester, fatty acid glyceride, hydrogenated castor oil, vaseline, POE hydrogenated lanolin alcohol ether, and the like. However, the present invention is not limited to these examples. Among them, natural waxes such as carnauba wax and candelilla wax, and waxes having a relatively high melting point (about 80 ℃ or higher) are preferably used in view of long-term storage stability.

These waxes may be used in combination, and may be used in a range of from solid to semisolid at room temperature even when mixed with other solid or liquid oils.

Examples of such other oil components include the following. However, the present invention is not limited to these examples. Examples of the liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, torreya oil, rice bran oil, paulownia oil, jatropha oil, jojoba oil, germ oil, triglycerol (triglycerol), tricaprylin, pentaerythritol tetracaprylate, and triacetin. Examples of the solid fat include cacao butter, coconut oil, hydrogenated coconut oil, palm kernel oil, lignocelluloses kernel oil, hydrogenated oil, and the like. Examples of hydrocarbon oils include liquid paraffin, ceresin, squalene, pristane, paraffin, squalane and the like.

The amount of the wax to be blended in the present invention is preferably 0.01 to 25% by mass, and particularly preferably 0.1 to 15% by mass, based on the total amount of the wax finely dispersed composition. When the amount is less than 0.01% by mass, it is difficult to obtain a firm feeling of the skin after use, while when the amount is more than 25% by mass, it is difficult to prepare a preparation.

< nonionic surfactant >

The nonionic surfactant is not particularly limited as long as it is a nonionic surfactant that can be generally used in cosmetics, and the weighted average HLB of all nonionic surfactants in the wax finely dispersed composition of the present invention is preferably 10 to 15, more preferably 11 to 14, and particularly preferably 12 to 13. By using a nonionic surfactant having HLB in the above range, a transparent composition that melts in a high temperature state (for example, a melting temperature range of wax not less than the melting point) can be obtained. HLB is calculated by the formula shown in the following numerical formula 1.

[ mathematical formula 1]

HLB＝7+11.7·log(MW/MO)

(wherein MW represents the molecular weight of the hydrophilic moiety and MO represents the molecular weight of the lipophilic moiety.)

In the present invention, as the nonionic surfactant, it is particularly preferable to use 1 or 2 or more selected from POE alkyl ethers, POE-POP alkyl ethers, POE glyceryl ether fatty acid esters, and POE castor oil, POE hydrogenated castor oil, and derivatives thereof. Among these, the use of POE alkyl ethers and POE-POP alkyl ethers is more preferable because the prepared wax fine dispersion has good stability with time, and changes in appearance (reduction in transparency) due to aggregation of fine particles and the like with the passage of time, and delamination of dispersed particles are improved.

As described later, the wax finely dispersed composition used in the present invention is preferably obtained by the following method: the wax is melted by heating and then cooled to normal temperature to obtain a wax fine dispersion, and 1 or 2 or more kinds selected from POE alkyl ethers, POE-POP alkyl ethers and POE glycerin ether fatty acid esters are used as the nonionic surfactant, whereby the melting rate of the wax can be remarkably increased and the production efficiency can be improved.

The POE alkyl ethers and POE-POP alkyl ethers preferably use 1 or 2 or more selected from the compounds represented by the following formula (I) and/or the following formula (II).

In the formulas (I) and (II), R represents an alkyl or alkenyl group having 12 to 24 carbon atoms, m represents a number of 5 to 30, and n represents a number of 0 to 5. Angle (c)

Examples of such POE alkyl ethers and POE-POP alkyl ethers include POE lauryl ether, POE cetyl ether, POE stearyl ether, POE oleyl ether, POE behenyl ether, POE decyltetradecyl ether, POE monobutyl ether, POE 2-decyltetradecyl ether, POE hydrogenated lanolin, POE glyceryl ether, POE-POP lauryl ether, POE-POP cetyl ether, POE-POP stearyl ether, POE-POP oleyl ether, POE-POP behenyl ether, POE-POP decyltetradecyl ether, POE-POP monobutyl ether, POE-POP 2-decyltetradecyl ether, POE-POP hydrogenated lanolin, and POE-POP glyceryl ether.

Examples of the POE glycerol ether fatty acid esters include POE glycerol ether monostearate, POE glycerol ether monoisostearate, and POE glycerol ether triisostearate.

Examples of the POE castor oil or POE hydrogenated castor oil and derivatives thereof include POE castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamic acid monoisostearic acid diester, POE hydrogenated castor oil maleic acid, and the like.

In the present invention, nonionic surfactants other than those mentioned above can be used as desired, and examples thereof include POE sorbitan fatty acid esters such as POE sorbitan monooleate and POE sorbitan tetraoleate; POE sorbitol fatty acid esters such as POE sorbitol monolaurate, POE sorbitol monooleate, POE sorbitol pentaoleate, and POE sorbitol monostearate; POE fatty acid esters such as POE monooleate and ethylene glycol distearate; POE alkylphenyl ethers such as POE octylphenyl ether, POE nonylphenyl ether, and POE dinonylphenyl ether; pluronic, Pluronic et al, Pluronic species; TEtronic and other tetrapOE-tetrapPOP ethylenediamine condensates; POE beeswax/lanolin derivatives such as POE sorbitol beeswax; alkanolamides such as coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, and fatty acid isopropanolamide; POE propylene glycol fatty acid ester, POE alkylamine, POE fatty acid amide, sucrose fatty acid ester, POE nonylphenyl formaldehyde condensate, alkyl ethoxy dimethyl amine oxide, trioleyl phosphoric acid, and the like.

The blending ratio of the nonionic surfactant/wax in the present invention is preferably 1.0 or more (mass ratio) in the total amount of the wax finely dispersed composition, and more preferably 1.1 or more. When the mass ratio is less than 1.0, it is difficult to obtain a composition having good stability. The upper limit of the mass ratio is not particularly limited, but is preferably about 5.0 or less, and more preferably about 3.0 or less. If the value of the mass ratio is too large, the feeling of use tends to be deteriorated.

< aqueous Dispersion Medium >

As the aqueous dispersion medium, water alone may be used, or a mixed solution of water and an aqueous component such as ethanol, glycerin, polyethylene glycol, propylene glycol, dipropylene glycol, 1, 3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucopolysaccharide sulfate (mucoitin sulfate), trichosanthes kirilowii maxim acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile acid salt, short-chain soluble collagen, diglycerol (EO) PO adduct, rosa roxburghii extract, yarrow extract, sweet clover extract, or the like may be used.

In the present invention, the wax is dispersed in the form of fine particles (fine wax) having a particle diameter of 500nm or less in the form of a solid to semisolid in the aqueous solvent. In a system containing an extremely fine particle size of 500nm or less (microemulsion system), unlike a normal emulsion system having a large particle size, the system is more stable, and is stable even with the passage of time, and two-phase separation is difficult. The stable microemulsion system is obtained by the following methods: increasing the amount of nonionic surfactant blended with the wax (in the present invention, the nonionic surfactant/wax (mass ratio) is 1.0 or more, as described above); as described in detail in the section of < production method > described later, it is more preferable that the system is heated to a temperature not lower than the melting point of the wax and within the melting temperature range, and then is cooled to room temperature after going through the molten state.

The term "melting" is generally defined as a process in which a water-insoluble substance or a water-insoluble substance is dissolved in a micellar solution formed from an emulsifier in a transparent and stable manner, and the wax is once melted in the system by heating to the melting temperature range and then cooled, whereby a stable ultrafine wax dispersion having a particle size of 500nm or less as in the present invention can be obtained more efficiently. It should be noted that the "melting" phenomenon can also be achieved by incorporating a large amount of a nonionic surfactant in relation to the wax.

< Ionic Water-soluble thickener >

Examples of the ionic water-soluble thickener used in the present invention include alginic acid polymers such as sodium alginate and propylene glycol alginate; vinyl polymers such as carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers; acrylic polymers such as sodium polyacrylate, polyethylacrylate, and polyacrylamide; a polyethyleneimine; and cationized polymers such as cationized cellulose, polydiallyldimethylammonium salts, diallyldimethylammonium salt/acrylamide copolymers, and vinylpyrrolidone/dimethylaminoethyl methacrylate polymers. However, the present invention is not limited to these examples. Among them, vinyl polymers such as carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers are preferably used. The ionic water-soluble thickener may be used in 1 kind or 2 or more kinds.

The amount of the ionic water-soluble thickener to be added in the present invention is preferably 0.01 to 5% by mass, and particularly preferably 0.1 to 2% by mass, based on the total amount of the wax finely dispersed composition. When the amount is less than 0.01% by mass, it is difficult to adjust the viscosity of the composition, while when the amount is more than 5% by mass, the use feeling tends to be deteriorated.

In the present invention, the surfactant composition does not substantially contain an anionic surfactant, a cationic surfactant, or an amphoteric surfactant, which are ionic surfactants. Here, "substantially not contained" excludes the case where these ionic surfactants are contained in a compounding amount to such an extent that the effect as an active agent can be exerted. By not blending these ionic surfactants, the effects of the ionic water-soluble thickener (such as an effect of imparting a firm feeling and an effect of improving the ease of application to a part such as the corner of the eye or the corner of the mouth with a fingertip) can be sufficiently exhibited.

< Silicone oil and/or fluorine oil component >

In the present invention, in addition to the above components, a silicone oil and/or a fluorine oil component which is liquid at room temperature may be blended.

Examples of the silicone oil which is liquid at room temperature used in the present invention include chain siloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane and polymethylhydrosiloxane, cyclic siloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, amino-modified silicone oil, polyether-modified silicone oil, carboxyl-modified silicone oil, alkyl-modified silicone oil, ammonium salt-modified silicone oil, fluorine-modified silicone oil, trimethylsiloxysilicate and other silicone resins capable of forming a three-dimensional network structure, high polymethylpolysiloxanes such as high dimethylpolysiloxane, high polymethylphenylsiloxane and high polymethylvinyl Polysiloxane, and high polyamino-modified methylpolysiloxane.

The fluorine oil component which is liquid at room temperature used in the present invention includes perfluoropolyether and the like. Examples of commercially available products include FOMBLIN HC-04, FOMBLIN HC-25 and FOMBLIN HC-R manufactured by モンテフロス.

In the present invention, 1 or 2 or more of the above silicone oil and fluorine oil components can be used.

The amount of the silicone oil or the fluorine oil component blended in the present invention is preferably 0.1 to 10% by mass, and particularly preferably 1 to 5% by mass, based on the total amount of the wax finely dispersed composition. When the amount is less than 0.1% by mass, a sufficient non-sticky feeling cannot be obtained, while when the amount is more than 10% by mass, the feeling of use tends to be deteriorated.

< production method >

In the wax finely dispersed composition used in the present invention, the fine wax having a particle size of 500nm or less is finely dispersed in a solid to semisolid state in an aqueous dispersion medium. The method for producing such a wax finely dispersed composition is not particularly limited, and preferred examples thereof include the following production methods.

1. Mode for not containing silicone oil and/or fluorine oil component in the wax finely dispersed composition:

the manufacturing method comprises the following steps: a system containing a wax, a nonionic surfactant and an aqueous dispersion medium is heated to a temperature not lower than the melting point of the wax and within the melting temperature range, is brought into a molten state, is cooled to normal temperature, and is then added with an ionic water-soluble thickener. More specifically, a preferred embodiment is a wax finely dispersed composition obtained by dissolving a nonionic surfactant and, if desired, a polyol in ion-exchanged water, heating the solution to 85 to 95 ℃, adding a wax (e.g., carnauba wax) thereto, stirring the solution for about 30 minutes to 2 hours with a propeller stirrer, confirming the molten state, cooling the solution with ice, and then adding and stirring an ionic water-soluble thickener. In this case, as described above, 1 or 2 or more kinds selected from POE alkyl ethers and POE-POP alkyl ethers can be used together with POE glycerin ether fatty acid esters as the nonionic surfactant, whereby the melting rate of the wax can be remarkably increased, and the production efficiency can be improved. Thereby, the fine wax is effectively dispersed in the aqueous dispersion medium. It is to be noted that the conditions shown in this specific example are not, of course, limiting the production method.

In addition to the above-mentioned production method, the following methods may be used for the preparation: a system containing a wax, a nonionic surfactant and an aqueous dispersion medium is emulsified with a high-shear emulsifier at a temperature not lower than the melting point of the wax, and then further emulsified with an ionic water-soluble thickener. When an emulsifying machine capable of imparting a strong shearing force, for example, a high-pressure homogenizer is used, the emulsification is preferably performed at a pressure of 400 atmospheres or more, and more preferably at a temperature of 600 atmospheres or more at a temperature of the melting point of the wax.

2. Mode for containing silicone oil and/or fluorine oil component in the wax finely dispersed composition:

the manufacturing method comprises the following steps: a system containing a wax, a nonionic surfactant and an aqueous dispersion medium is heated to a temperature not lower than the melting point of the wax and within the melting temperature range, is brought into a molten state, is cooled to normal temperature, and is then added with an ionic water-soluble thickener, a silicone oil and/or a fluorine oil component. More specifically, a preferred embodiment is a wax finely dispersed composition obtained by dissolving a nonionic surfactant and, if desired, a polyol in ion-exchanged water, heating the resulting solution to 85 to 95 ℃, adding a wax (e.g., carnauba wax) thereto, stirring the resulting solution for about 30 minutes to 2 hours with a propeller stirrer, confirming the molten state, cooling the resulting solution with ice, and then adding and stirring an ionic water-soluble thickener, a silicone oil and/or a fluorine oil component. In this case, as described above, 1 or 2 or more kinds selected from POE alkyl ethers and POE-POP alkyl ethers can be used together with POE glycerin ether fatty acid esters as the nonionic surfactant, whereby the melting rate of the wax can be remarkably increased, and the production efficiency can be improved. Thereby, the fine wax is effectively dispersed in the aqueous dispersion medium. It is to be noted that the conditions shown in this specific example are not, of course, limiting the production method.

In addition to the above-mentioned production method, the following methods may be used for the preparation: after emulsifying a system containing a wax, a nonionic surfactant and an aqueous dispersion medium by a high shear emulsifier at a temperature not lower than the melting point of the wax, an ionic water-soluble thickener and a silicone oil and/or a fluorine oil component are added to further emulsify the mixture. When an emulsifying machine capable of imparting a strong shearing force, for example, a high-pressure homogenizer is used, the emulsification is preferably performed at a pressure of 400 atmospheres or more, and more preferably at a temperature of 600 atmospheres or more at a temperature of the melting point of the wax.

[ skin external preparations ]

The external preparation for skin of the present invention contains the above-mentioned wax finely dispersed composition.

Generally, it is difficult to obtain a cosmetic with a high firming feeling when only a water-soluble polymer is blended in a skin external preparation, but in the present invention, a skin external preparation with a high firming feeling can be obtained by blending a wax finely dispersed composition using a solid-to-semisolid wax having a particle size of 500nm or less. When a general emulsion-type cosmetic having a large particle diameter is used for application, wax is deposited on the skin over time, but in the present invention, the wax can be prevented from being deposited on the skin over time after the skin external preparation is applied to the skin by using the wax fine dispersion composition.

In addition, it is generally difficult to stably disperse a solid-to-semisolid wax in water, but in the present invention, a wax finely dispersed composition having a high sense of firmness and excellent stability can be obtained by using a specific surfactant and preferably a specific production process.

Further, the safety of ionic surfactants is concerned, but the external preparation for skin of the present invention can melt wax even without containing ionic surfactants. In addition, by not blending an ionic surfactant, the thickening can be performed by an ionic polymer, and the tightening feeling after applying to the skin can be improved well. In addition, the ease of application to the part such as the corner of the eye and the corner of the mouth can be improved. Further, by blending a silicone oil and/or a fluorine oil component, in addition to the above effects, excellent usability without a sticky feeling and a feeling of adhesion to the skin can be obtained.

The skin external preparation of the present invention may contain, as necessary, components that can be added to cosmetics such as skin external preparations, as appropriate, in addition to the wax finely dispersed composition, within a range that does not impair the effects of the present invention. Examples of such optional additives include, but are not limited to, humectants such as polyhydric alcohols (e.g., glycerin), perfumes, pH adjusters, preservatives, various powders, oil-soluble drugs (e.g., vitamin a), and water-soluble thickeners other than ionic water-soluble thickeners.

Specifically, the external preparation for skin of the present invention is suitably used as a cosmetic water, an emulsion-like cosmetic liquid, a gel-like cosmetic liquid, a skin cream, a nonwoven fabric-impregnated mask, or the like. The formulation is preferably a transparent to translucent micro-dispersed cosmetic water, a thickened gel, or the like. However, the present invention is not limited to these examples.

Examples

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The amount to be blended is expressed as% by mass of the component based on the system to be blended unless otherwise specified.

1. Mode for not containing silicone oil and/or fluorine oil component in the wax finely dispersed composition:

example 1: optimum HLB of nonionic surfactant ]

In the following basic formulation 1, the dispersion state (appearance) was examined by changing the HLB of the nonionic surfactant as shown in the following table 1, and the optimum HLB of the nonionic surfactant was investigated.

< basic recipe 1>

(test method)

A wax finely dispersed composition having the composition shown in the basic formula 1 was prepared. That is, a nonionic surfactant (table 1) was dissolved in ion-exchanged water, heated to 85 to 95 ℃, carnauba wax was added, and stirred with a propeller for about 2 hours. Thereafter, ice-cooling was performed to obtain an intermediate composition. These intermediate compositions were allowed to stand at room temperature for 1 hour, and then the appearance (dispersed state) was visually observed. The results are shown in Table 1.

[ Table 1]

From the results in table 1, it is understood that when the HLB of the nonionic surfactant is 10 or more and 15 or less, a uniform dispersion system can be formed. In addition, when the HLB of the nonionic surfactant is 11 to 14, a transparent to translucent single liquid phase (single liquid phase) system can be obtained, and it has been confirmed that: the HLB is 12 to 13 to obtain a transparent system.

Next, a carboxyvinyl polymer was added to these intermediate compositions, and the polymer was dissolved by stirring with a propeller for about 1 hour, followed by addition of potassium hydroxide to obtain the intended final composition. The HLB of the final composition was the same as that of the intermediate composition, and there was little change in appearance. The average particle size of the wax particles in the final composition was determined. The results are also shown in Table 1. The particle size measurement method is as follows.

That is, each final product was diluted with ion-exchanged water to 1/10 concentration to prepare a sample. These samples were observed using "ZETASIZER NANO SERIES NANO-ZS" (manufactured by Sysmex corporation) to determine the wax particle diameter.

Example 2: types of nonionic surfactant and Dispersion State of System ]

In the basic formulation 1, as shown in table 2 below, POE linear alkyl ether and POE branched alkyl ether were used as the nonionic surfactant, and HLB was varied between 9 and 15 by changing the number of addition mols (n) of POE, and the dispersion state of the system was evaluated according to the following evaluation criteria. The results are shown in Table 2.

(test method)

Dissolving a nonionic surfactant (table 2) in ion exchange water, heating to 85-95 ℃, adding carnauba wax, and stirring for about 2 hours in a propeller manner. Thereafter, ice-cooling was performed to obtain an intermediate composition. These intermediate compositions were allowed to stand at room temperature for 1 hour, and then the appearance was visually observed, and evaluated according to the following evaluation criteria. The results are shown in Table 2.

(evaluation criteria)

O: form a transparent single liquid phase

And (delta): translucent or uniformly displaying paste

X: and (5) separating.

[ Table 2]

(n: POE addition mole number)

From the results shown in table 2, it is understood that when each nonionic surfactant is used alone, a transparent single liquid phase is formed when HLB is about 12 to 13. In addition, it was confirmed that a plurality of nonionic surfactants can be used in combination.

To these intermediate compositions, a carboxyvinyl polymer was added, and after dissolving the polymer by stirring with a propeller for about 1 hour, potassium hydroxide was added to obtain a desired final composition (wax finely dispersed composition). The final composition has the same HLB as the intermediate composition and also shows little change in appearance.

The average particle diameter of the wax microparticles in the final product was measured in the same manner as in example 1. As a result, the dispersion state was evaluated as "o: the transparent single liquid phase is formed, the average grain diameter is 20-49 nm, and the ratio of delta: translucent or uniform paste-like "average particle diameter in the range of 50 to 400nm," ×: the average particle size could not be measured in the separation ".

Example 3: stability with time ]

In the following basic formulation 2, the stability of the system was evaluated according to the following evaluation criteria, with the nonionic surfactant changed as shown in the following table 3.

< basic recipe 2>

(test method)

Dissolving a surfactant in ion exchange water, heating to 85-95 ℃, adding carnauba wax, and stirring for about 2 hours in a propeller manner. Thereafter, the mixture was cooled in ice, and then an alkyl-modified carboxyvinyl polymer was added to obtain a transparent one-liquid-phase wax finely dispersed composition as a final composition.

The compositions (samples 1 to 6) were visually observed for 1 week after standing at 50 ℃ and the stability with time was evaluated by the following evaluation criteria. The results are shown in Table 3.

(evaluation criteria)

O: no change in state, unlike that immediately after modulation

X: and (5) separating.

[ Table 3]

From the results shown in table 3, it is understood that sample 5 having a nonionic surfactant/wax (mass ratio) of less than 1 is separated, and good stability cannot be obtained.

Example 4, comparative example 1: melting Rate of wax

In table 4 below, the surfactant and dipropylene glycol were dissolved in ion-exchanged water, heated to 85 to 95 ℃, and carnauba wax was added and stirred with a propeller, and the time until the carnauba wax was melted was measured. The results are shown in Table 4. The final composition (wax finely dispersed composition) was obtained by adding the alkyl-modified carboxyvinyl polymer after cooling the molten intermediate composition with ice.

[ Table 4]

From the results in table 4, it is understood that in example 4 in which POE (20) behenyl ether and POE (20) glyceryl ether isostearate were used together as the nonionic surfactant, the time required for melting the wax was significantly shortened as compared with comparative example 1 in which 1 kind of POE (20) behenyl ether was used alone as the nonionic surfactant. The fine wax particles of example 4 and comparative example 1 had a particle size of 20 to 49 nm.

Example 5: feeling of use ]

A sample having the following composition was heated and melted according to the production method described in example 1, and then cooled to prepare a raw solution for an impregnation mask (wax fine dispersion). The diameter of the fine wax particles in the stock solution obtained was 28 nm. The nonwoven fabric was immersed in the stock solution to prepare a nonwoven fabric-immersed mask (product of the present invention).

(stock solution for impregnation mask)

(test method)

The usability was evaluated by 31 professional panelists who used commercially available nonwoven fabric-impregnated facial masks, as shown in table 5 below. That is, the feeling of use of the nonwoven fabric-impregnated mask film (the product of the present invention) and the general product (a commercially available impregnated mask film usually used by professional judges) was evaluated by the following evaluation. The results are shown in Table 5. The stock solution was excellent in stability.

(rating)

+2: the product of the invention is superior to the common product

+1: the product of the invention is slightly superior to the common product

0: the product of the invention is the same as the common product

-1: the general product is slightly superior to the product of the invention

-2: the product is superior to the product of the invention

[ Table 5]

As is clear from the results in table 5, the skin-tightening effect of example 5 (inventive product) is particularly excellent, and an impregnated mask having a high repair satisfaction can be provided.

The following further shows formulation examples of the present invention.

[ compounding formulation example 1: cosmetic liquid

(Components Complex) (mass%)

(1) Carnauba wax 1.5

(2) POE (20) behenyl ether 1.8

(3) Carboxyvinyl Polymer 0.3

(4) 0.1 part of potassium hydroxide

(5) Tocopheryl acetate 0.05

(6) Glycerol 5

(7) Ion exchange water balance

(8) Proper amount of perfume

(9) Phenoxyethanol 0.5

(preparation method)

Stirring and mixing part of (1), (2), (5) and (8) and part of (6) and (7) at about 95 deg.C, adding the mixture to a mixture of the rest of (6) and (7) and (3), (4) and (9) to obtain a cosmetic liquid, wherein the mixture is transparent and ice-cooled to obtain a fine wax dispersion.

[ compounding formulation example 2: whitening gel ]

(Components Complex) (mass%)

(1) Carnauba wax 0.5

(2) Candelilla wax 0.3

(3) 0.2% of rice bran wax

(4) Beeswax 0.1

(5) Microcrystalline wax 0.1

(6) 0.1 Paraffin wax

(7) Vaseline 0.1

(8) Behenyl alcohol 0.1

(9) Stearyl alcohol 0.03

(10) POE (10) behenyl ether 0.1

(11) POE (20) behenyl ether 1.5

(12) POE (30) behenyl ether 0.1

(13) POE (20) Glycerol Ether Isostearate 0.1

(14) Retinol palmitate 0.01

(15) Alpha-tocopherol 0.01

(16) Tetraisopalmitoyl ascorbic acid 0.01

(17) Isobutyl resorcinol 0.01

(18) Linoleic acid 0.03

(19) Linolenic acid 0.02

(20) Ascorbic acid sodium phosphate 0.01

(21) Ascorbic acid magnesium phosphate 0.01

(22) Ascorbic acid 2-glucoside 2

(23) Ethyl ascorbic acid 0.01

(24) Panthenol Ether 0.01

(25) Arbutin 0.01

(26) Tranexamic acid formamide salt 1

(27) Dipotassium glycyrrhizinate 0.01

(28) 4-Methoxysalicylate 1

(29) Glycerol 1

(30) Dipropylene glycol 10

(31) Polyethylene glycol 1

(32) Para hydroxybenzoates 0.15

(33) Phenoxyethanol 0.3

(34) Ethylenediaminetetraacetic acid trisodium 0.02

(35) Proper amount of citric acid

(36) Proper amount of sodium citrate

(37) Proper amount of potassium hydroxide

(38) Carboxyvinyl Polymer 0.2

(39) Acrylic acid/alkyl acrylate (C)_10-30) Copolymer 0.5

(40) Hydroxyethyl cellulose 0.1

(41) Methyl cellulose 1

(42) 2-Methacryloyloxyethylphosphorylcholine-butyl methacrylate copolymer 0.1

(43) Ethanol 10

(44) Proper amount of perfume

(45) Ion exchange water balance

[ compounding formulation example 3: moisturizing gel

(Components Complex) (mass%)

(1) Carnauba wax 0.5

(2) 0.4% of rice bran wax

(3) 0.1 Paraffin wax

(4) POE Cholesterol Ether 0.1

(5) Stearic acid glyceride 0.05

(6) Hydrogenated Castor oil 0.1

(7) Behenyl alcohol 0.2

(8) Batyl alcohol 0.05

(9) Stearic acid 0.05

(10) Triglycerol 0.05

(11) Tricaprylin 0.05

(12) 0.1 Paraffin wax

(13) POE (10) behenyl ether 0.7

(14) POE (30) behenyl ether 0.8

(15) POP (1) POE (15) behenyl ether 0.2

(16) POE (20) Glycerol Ether Isostearate 0.01

(17) POE (60) hydrogenated Castor oil 0.5

(18) Tocopheryl acetate 0.01

(19) Glycyrrhetinic acid stearyl ester 0.01

(20) Ubiquinone 0.01

(21) Beta-carotene 0.01

(22) Vitamin D2 (ergocalciferol) 0.005

(23) Gamma-oryzanol 0.01

(24) Ascorbic acid magnesium phosphate 1

(25) Nicotinic acid 0.01

(26) Urea 2

(27) Hyaluronic acid 0.001

(28) Acetylated hyaluronic acid 0.001

(29) Trehalose 1

(30) Erythritol 1

(31) Xylitol 1

(32) Glycerol 5

(33) Polyethylene glycol 5

(34) POE-POP dimethyl Ether 1

(35) Phenoxyethanol 0.5

(36) Ethylenediaminetetraacetic acid trisodium 0.02

(37) Proper amount of citric acid

(38) Proper amount of sodium citrate

(39) Proper amount of potassium hydroxide

(40) Behenyl alcohol 0.1

(41) Dimethylacrylamide/sodium acryloyldimethyl taurate crosslinked polymer

0.1

(42) Proper amount of perfume

(43) Ion exchange water balance

[ compounding formulation example 4: anti-ultraviolet gel

(Components Complex) (mass%)

(1) Carnauba wax 0.4

(2) Beeswax 0.5

(3) 0.1 Paraffin wax

(4) POE Cholesterol Ether 0.1

(5) Hydrogenated Castor oil 0.1

(6) Behenyl alcohol 0.5

(7) Batyl alcohol 0.1

(8) Stearic acid 0.05

(9) Triglycerol 0.05

(10) Pentaerythritol Tetraoctanoate 0.1

(11) POE (20) behenyl ether 1.8

(12) POE (20) glyceryl Ether isostearate 1.5

(13) POE (60) Glycerol Ether Isostearate 0.03

(14) Tocopheryl acetate 0.01

(15) Glycyrrhetinic acid stearyl ester 0.01

(16) Isobutyl resorcinol 0.01

(17) 2-cyano-3, 3-diphenylpropenoic acid-2-ethylhexyl ester 0.05

(18) Octyl methoxycinnamate 0.05

(19) Tranexamic acid 1

(20) Tranexamic acid formamide salt 1

(21) Nicotinamide 0.01

(22) Hydroxyproline 0.01

(23) Glycerol 10

(24) Butanediol 5

(25) Polyethylene glycol 1

(26) POE-POP dimethyl Ether 5

(27) Parabens 0.1

(28) Phenoxyethanol 0.5

(29) Ethylenediaminetetraacetic acid trisodium 0.02

(30) Proper amount of citric acid

(31) Proper amount of sodium citrate

(32) Proper amount of potassium hydroxide

(33) Carboxyvinyl Polymer 0.5

(34) Acrylic acid-alkyl acrylate (C)_10-30) Copolymer 0.5

(35) Ethanol 5

(36) Proper amount of perfume

(37) Ion exchange water balance

2. Mode for containing silicone oil and/or fluorine oil component in the wax finely dispersed composition:

example 6: optimum HLB of nonionic surfactant ]

In the following basic formulation 3, the HLB of the nonionic surfactant was changed as shown in table 6, and the dispersion state (appearance) was examined to investigate the optimum HLB of the nonionic surfactant.

< basic recipe 3>

(test method)

A wax finely dispersed composition having the composition shown in the above basic formula 3 was prepared. That is, a nonionic surfactant (table 6) was dissolved in ion-exchanged water, heated to 85 to 95 ℃, carnauba wax was added, and stirred with a propeller for about 2 hours. Thereafter, ice-cooling was performed to obtain an intermediate composition. These intermediate compositions were allowed to stand at room temperature for 1 hour, and then the appearance (dispersed state) was visually observed. The results are shown in Table 6.

[ Table 6]

From the results in table 6, it is understood that when the HLB of the nonionic surfactant is 10 or more and 15 or less, a uniform dispersion system can be formed. In addition, when the HLB of the nonionic surfactant is 11 to 14, a transparent to translucent single liquid phase (single liquid phase) system can be obtained, and it has been confirmed that: the HLB is 12 to 13 to obtain a transparent system.

Next, a carboxyvinyl polymer was added to these intermediate compositions, the polymer was dissolved by stirring with a propeller for about 1 hour, and then potassium hydroxide was added, followed by adding dimethylpolysiloxane to perform a homogenization treatment, thereby obtaining the target final composition. The final composition has the same HLB as the intermediate composition, and the appearance is slightly lower in transparency than the intermediate composition, but is unchanged from the viewpoint of the uniformity of the system. The average particle size of the wax particles in the final composition was determined. The results are also shown in Table 5. The particle size measurement method was the same as the measurement method described in example 1.

Example 7: types of nonionic surfactant and Dispersion State of System ]

In the basic formulation 3, as shown in table 7 below, POE linear alkyl ether and POE branched alkyl ether were used as the nonionic surfactant, and HLB was varied between 9 and 15 by changing the number of addition mols (n) of POE, and the dispersion state of the system was evaluated according to the following evaluation criteria. The results are shown in Table 7.

(test method)

The surfactant (table 7) was dissolved in ion exchange water, heated to 85-95 ℃, carnauba wax was added, and stirred with a propeller for about 2 hours. Thereafter, ice-cooling was performed to obtain an intermediate composition. These intermediate compositions were allowed to stand at room temperature for 1 hour, and then the appearance was visually observed. The results are shown in Table 7.

(evaluation criteria)

O: form a transparent single liquid phase

And (delta): translucent or uniformly displaying paste

X: and (5) separating.

[ Table 7]

(n: POE addition mole number)

From the results shown in Table 7, it is understood that when each nonionic surfactant is used alone, a transparent single liquid phase is formed when HLB is about 12 to 13. In addition, it was confirmed that a plurality of nonionic surfactants can be used in combination.

To these intermediate compositions, a carboxyvinyl polymer was added, the polymer was dissolved by stirring with a propeller for about 1 hour, and then potassium hydroxide was added, followed by addition of dimethylpolysiloxane to conduct homogenization treatment, thereby obtaining the target final composition (wax finely dispersed composition). The final composition has the same HLB as the intermediate composition, and the appearance is slightly lower in transparency than the intermediate composition, but is unchanged from the viewpoint of the uniformity of the system.

The average particle diameter of the wax microparticles in the final product was measured in the same manner as in example 1. As a result, the dispersion state was evaluated as "o: the transparent single liquid phase is formed, the average grain diameter is 20-49 nm, and the ratio of delta: translucent or uniform paste-like "average particle diameter in the range of 50 to 400nm," ×: the average particle size could not be measured in the separation ".

Example 8: stability with time ]

In the following basic formulation 4, the stability of the system was evaluated according to the following evaluation criteria, with the nonionic surfactant changed as shown in the following table 8.

< basic recipe 4>

(test method)

Dissolving a nonionic surfactant in ion exchange water, heating to 85-95 ℃, adding carnauba wax, and stirring for about 2 hours in a propeller manner. Thereafter, the mixture was cooled in ice, and then the alkyl-modified carboxyvinyl polymer, the silicone oil and/or the fluorine oil component were added thereto, and after stirring for about 2 hours by a propeller, homogenization treatment was performed to obtain a translucent single-liquid-phase wax finely dispersed composition as a final composition.

The compositions (samples 7 to 12) were visually observed for 1 week after standing at 50 ℃ and the stability with time was evaluated by the following evaluation criteria. The results are shown in Table 8.

(evaluation criteria)

O: no change in state, unlike that immediately after modulation

X: and (5) separating.

[ Table 8]

From the results shown in table 8, it is understood that sample 11 having a nonionic surfactant/wax (mass ratio) of less than 1 is separated, and good stability cannot be obtained.

Example 9, comparative example 2: melting Rate of wax

In table 9 below, the surfactant and dipropylene glycol were dissolved in ion-exchanged water, heated to 85 to 95 ℃, and carnauba wax was added and stirred with a propeller, and the time until an intermediate composition in which carnauba wax was melted was obtained was measured. The results are shown in Table 9. The final composition (wax finely dispersed composition) was obtained by cooling the intermediate composition after melting with ice, dissolving the carboxyvinyl polymer, adding dimethylpolysiloxane, and homogenizing.

[ Table 9]

As is clear from the results in table 9, in example 9 in which POE (20) behenyl ether and POE (20) glyceryl ether isostearate were used together as the nonionic surfactant, the time required for melting the wax was significantly shortened as compared with comparative example 2 in which only 1 kind of POE (20) behenyl ether was used. The fine wax particles of example 9 and comparative example 2 had a particle size of 20 to 50 nm.

Examples 10 to 12 and comparative examples 3 to 4: firming, adhesive, and non-sticky feeling of the skin

Samples having the compositions shown in the following table 10 (examples 10 to 12 and comparative examples 3 to 4) were prepared, applied to the skin by 10 panelists, and evaluated for the skin firmness, the skin adhesiveness, and the non-stickiness according to the following evaluation criteria. The results are shown in Table 10. The stability was good in examples 10 to 12 and comparative examples 3 to 4.

(evaluation of skin firmness)

O: more than 7 of 10 people answer the skin with firming feeling

And (delta): among 10 persons, 4-6 persons answer the skin-like tightness

X: among 10 persons, 3 persons responded with the sense of skin firmness.

(evaluation of skin-contact feeling)

O: more than 7 out of 10 people answer the skin

And (delta): 4-6 out of 10 answers have the feeling of close contact with the skin

X: among 10 persons, 3 persons responded with a feeling of skin-contact.

(evaluation of non-tackiness feeling)

O: more than 7 of 10 persons answer no greasy feeling

And (delta): 4-6 out of 10 persons answer no sticky feeling

X: among 10 persons, 3 persons responded without stickiness.

[ Table 10]

The following further shows formulation examples of the present invention.

[ compounding formulation example 5: cosmetic liquid

(Components Complex) (mass%)

(1) Carnauba wax 1.5

(2) POE (20) behenyl ether 1.8

(3) Carboxyvinyl Polymer 0.3

(4) 0.1 part of potassium hydroxide

(5) Tocopheryl acetate 0.05

(6) Glycerol 5

(7) Dimethylpolysiloxane 2

(8) Ion exchange water balance

(9) Proper amount of perfume

(10) Phenoxyethanol 0.5

(preparation method)

Stirring and mixing part of (1), (2), (5) and (9) and part of (6) and (8) at about 95 deg.C, making the mixture transparent, ice-cooling to obtain a fine wax dispersion, adding the fine wax dispersion to the remaining mixture of (6) and (8) and (3), (4) and (10), adding (7), and homogenizing to obtain the cosmetic liquid.

[ compounding formulation example 6: whitening gel ]

(Components Complex) (mass%)

(1) 0.5 Brazilian palm

(2) Candelilla wax 0.3

(3) 0.2% of rice bran wax

(4) Beeswax 0.1

(5) Microcrystalline wax 0.1

(6) 0.1 Paraffin wax

(7) Vaseline 0.1

(8) Behenyl alcohol 0.1

(9) Stearyl alcohol 0.03

(10) POE (10) behenyl ether 0.1

(11) POE (20) behenyl ether 1.5

(12) POE (30) behenyl ether 0.1

(13) POE (20) Glycerol Ether Isostearate 0.1

(14) Retinol palmitate 0.01

(15) Alpha-tocopherol 0.01

(16) Tetraisopalmitoyl ascorbic acid 0.01

(17) Isobutyl resorcinol 0.01

(18) Linoleic acid 0.03

(19) Linolenic acid 0.02

(20) Ascorbic acid sodium phosphate 0.01

(21) Ascorbic acid magnesium phosphate 0.01

(22) Ascorbic acid 2-glucoside 2

(23) Ethyl ascorbic acid 0.01

(24) Panthenol Ether 0.01

(25) Arbutin 0.01

(26) Tranexamic acid formamide salt 1

(27) Dipotassium glycyrrhizinate 0.01

(28) 4-Methoxysalicylate 1

(29) Glycerol 1

(30) Dipropylene glycol 10

(31) Polyethylene glycol 1

(32) Para hydroxybenzoates 0.15

(33) Phenoxyethanol 0.3

(34) Ethylenediaminetetraacetic acid trisodium 0.02

(35) Proper amount of citric acid

(36) Proper amount of sodium citrate

(37) Proper amount of potassium hydroxide

(38) Methylpolysiloxane 2

(39) Phenyl polysiloxane 1

(40) Carboxyvinyl Polymer 0.2

(41) Acrylic acid-alkyl acrylate (C)_10-30) Copolymer 0.51

(42) 2-Methacryloyloxyethylphosphorylcholine-butyl methacrylate copolymer 0.1

(43) Ethanol 10

(44) Proper amount of perfume

(45) Ion exchange water balance

[ compounding formulation example 7: skin roughness improving cream

(Components Complex) (mass%)

(1) Carnauba wax 0.8

(2) Candelilla wax 0.2

(3) Beeswax 0.1

(4) Microcrystalline wax 0.1

(5) Vaseline 0.1

(6) Liquid Paraffin 0.1

(7) Squalane 0.1

(8) POE (20) behenyl ether 2

(9) POP (1) POE (15) behenyl ether 0.2

(10) POE (20) Glycerol Ether Isostearate 0.8

(11) Alpha-tocopherol 0.01

(12) Tocopheryl acetate 0.01

(13) Glycyrrhetinic acid stearyl ester 0.01

(14) Oil-soluble vitamin B0.01

(15) Dibutylhydroxytoluene 0.01

(16) Nicotinic acid benzyl ester 0.01

(17) Tranexamic acid 0.5

(18) Tranexamic acid formamide salt 0.1

(19) 4-Methoxysalicylate 0.5

(20) Nicotinic acid 0.01

(21) Nicotinamide 0.01

(22) Hydroxyproline 0.01

(23) Serine 0.01

(24) Thiotaurine 0.01

(25) Arginine 0.01

(26) Trimethylglycine 0.01

(27) Erythritol 5

(28) Glycerol 2

(29) Butanediol 5

(30) Dipropylene glycol 5

(31) Polyethylene glycol 2

(32) Phenoxyethanol 0.5

(33) Ethylenediaminetetraacetic acid trisodium 0.02

(34) Proper amount of citric acid

(35) Proper amount of sodium citrate

(36) Proper amount of potassium hydroxide

(37) Methylpolysiloxane 2

(38) Phenyl polysiloxane 1

(39) Decamethylcyclopentasiloxane 5

(40) Cetyl 2-ethylhexanoate 1

(41) White beeswax 1

(42) Batyl alcohol 1.65

(43) Behenyl alcohol 0.77

(44) Acrylic acid-alkyl acrylate (C)_10-30) Copolymer 0.3

(45) Ethanol 5

(46) Proper amount of perfume

(47) Ion exchange water balance

[ compounding formulation example 8: moisturizing gel

(Components Complex) (mass%)

(1) Carnauba wax 0.5

(2) 0.4% of rice bran wax

(3) 0.1 Paraffin wax

(4) POE Cholesterol Ether 0.1

(5) Stearic acid glyceride 0.05

(6) Hydrogenated Castor oil 0.1

(7) Behenyl alcohol 0.2

(8) Batyl alcohol 0.05

(9) Stearic acid 0.05

(10) Triglycerol 0.05

(11) Tricaprylin 0.05

(12) 0.1 Paraffin wax

(13) POE (10) behenyl ether 0.7

(14) POE (30) behenyl ether 0.8

(15) POP (1) POE (15) behenyl ether 0.2

(16) POE (20) Glycerol Ether Isostearate 0.01

(17) POE (60) hydrogenated Castor oil 0.5

(18) Tocopheryl acetate 0.01

(19) Glycyrrhetinic acid stearyl ester 0.01

(20) Ubiquinone 0.01

(21) Beta-carotene 0.01

(22) Vitamin D2 (ergocalciferol) 0.005

(23) Gamma-oryzanol 0.01

(24) Ascorbic acid magnesium phosphate 1

(25) Nicotinic acid 0.01

(26) Urea 2

(27) Hyaluronic acid 0.001

(28) Acetylated hyaluronic acid 0.001

(29) Trehalose 1

(30) Erythritol 1

(31) Xylitol 1

(32) Glycerol 5

(33) Polyethylene glycol 5

(34) POE-POP dimethyl Ether 1

(35) Phenoxyethanol 0.5

(36) Ethylenediaminetetraacetic acid trisodium 0.02

(37) Proper amount of citric acid

(38) Proper amount of sodium citrate

(39) Proper amount of potassium hydroxide

(40) Methylpolysiloxane 1

(41) Phenyl polysiloxane 1

(42) Behenyl alcohol 0.1

(43) Agar 2.5

(44) Dimethylacrylamide/sodium acryloyldimethyl taurate crosslinked polymer

0.1

(45) Proper amount of perfume

(46) Ion exchange water balance

[ compounding formulation example 9: anti-ultraviolet gel

(Components Complex) (mass%)

(1) Carnauba wax 0.4

(2) Beeswax 0.5

(3) 0.1 Paraffin wax

(4) POE Cholesterol Ether 0.1

(5) Hydrogenated Castor oil 0.1

(6) Behenyl alcohol 0.5

(7) Batyl alcohol 0.1

(8) Stearic acid 0.05

(9) Triglycerol 0.05

(10) Pentaerythritol Tetraoctanoate 0.1

(11) POE (20) behenyl ether 1.8

(12) POE (20) glyceryl Ether isostearate 1.5

(13) POE (60) Glycerol Ether Isostearate 0.03

(14) Tocopheryl acetate 0.01

(15) Glycyrrhetinic acid stearyl ester 0.01

(16) Isobutyl resorcinol 0.01

(17) 2-cyano-3, 3-diphenylpropenoic acid-2-ethylhexyl ester 0.05

(18) Octyl methoxycinnamate 0.05

(19) Tranexamic acid 1

(20) Tranexamic acid formamide salt 1

(21) Nicotinamide 0.01

(22) Hydroxyproline 0.01

(23) Glycerol 10

(24) Butanediol 5

(25) Polyethylene glycol 1

(26) POE-POP dimethyl Ether 5

(27) Parabens 0.1

(28) Phenoxyethanol 0.5

(29) Ethylenediaminetetraacetic acid trisodium 0.02

(30) Proper amount of citric acid

(31) Proper amount of sodium citrate

(32) Proper amount of potassium hydroxide

(33) Perfluoropolyether 3

(34) Phenyl polysiloxane 2

(35) Carboxyvinyl Polymer 0.5

(36) Acrylic acid/alkyl acrylate (C)_10-30) Copolymer 0.5

(37) Ethanol 5

(38) Proper amount of perfume

(39) Ion exchange water balance

Industrial applicability

The present invention can provide an external preparation for skin which is stable and has an excellent skin-tightening effect after use. Further, according to the present invention, it is possible to provide an external preparation for skin which is excellent in stability and an effect of imparting a firm feeling to the skin after use, is excellent in a feeling of being attached to the skin, and is free from a sticky feeling.

Claims (5)

1. A skin external preparation comprising a wax finely dispersed composition obtained by finely dispersing a wax in a solid to semisolid state in an aqueous dispersion medium, wherein the wax finely dispersed composition comprises a wax which is solid to semisolid at ordinary temperature and contains 1 or 2 or more nonionic surfactants selected from the group consisting of polyoxyethylene (15) lauryl ether, polyoxyethylene (15) stearyl ether, polyoxyethylene (15) oleyl ether, polyoxyethylene (18) aralkyl ether, polyoxyethylene (15) behenyl ether, polyoxyethylene (20) behenyl ether, polyoxyethylene (15) isostearyl ether, polyoxyethylene (20) isostearyl ether, polyoxyethylene (16) octyldodecyl ether, polyoxyethylene (20) decyltetradecyl ether, and polyoxyethylene (20) glyceryl ether isostearate, The skin external preparation contains an aqueous dispersion medium, an ionic water-soluble thickener, a nonionic surfactant/wax mass ratio of 1.0 or more, a finely dispersed wax having a particle diameter of 500nm or less, and a wax finely dispersed composition having a weighted average HLB of all nonionic surfactants of 12 to 13, and contains substantially no ionic surfactant.

2. The external preparation for skin according to claim 1, wherein the wax finely dispersed composition further contains a silicone oil and/or a fluorine oil which is liquid at room temperature.

3. The external preparation for skin according to claim 1 or 2, wherein the ionic water-soluble thickener is 1 or 2 or more selected from alginic acid-based polymers, vinyl-based polymers, acrylic acid-based polymers, polyethyleneimine and cationized polymers.

4. The external preparation for skin according to claim 1, wherein the wax finely dispersed composition is obtained by: heating a system containing a wax which is solid to semisolid at normal temperature, the system containing 1 or 2 or more nonionic surfactants selected from polyoxyethylene (15) lauryl ether, polyoxyethylene (15) stearyl ether, polyoxyethylene (15) oleyl ether, polyoxyethylene (18) aralkyl ether, polyoxyethylene (15) behenyl ether, polyoxyethylene (20) behenyl ether, polyoxyethylene (15) isostearyl ether, polyoxyethylene (20) isostearyl ether, polyoxyethylene (16) octyldodecyl ether, polyoxyethylene (20) decyltetradecyl ether, and polyoxyethylene (20) glyceryl ether isostearate, and an aqueous dispersion medium, wherein the mass ratio of the nonionic surfactant/wax is 1.0 or more, and the weighted average HLB of all the nonionic surfactants in the wax finely dispersed composition is 12 to 13 or more, to the melting point of the wax or higher, and a method for producing the wax finely dispersed composition, In the melting temperature range, after going through a molten state, cooling to normal temperature, and then adding an ionic water-soluble thickener.

5. The external preparation for skin according to claim 2, wherein the wax finely dispersed composition is obtained by: heating a system containing a wax which is solid to semisolid at normal temperature, the system containing 1 or 2 or more nonionic surfactants selected from polyoxyethylene (15) lauryl ether, polyoxyethylene (15) stearyl ether, polyoxyethylene (15) oleyl ether, polyoxyethylene (18) aralkyl ether, polyoxyethylene (15) behenyl ether, polyoxyethylene (20) behenyl ether, polyoxyethylene (15) isostearyl ether, polyoxyethylene (20) isostearyl ether, polyoxyethylene (16) octyldodecyl ether, polyoxyethylene (20) decyltetradecyl ether, and polyoxyethylene (20) glyceryl ether isostearate, and an aqueous dispersion medium, wherein the mass ratio of the nonionic surfactant/wax is 1.0 or more, and the weighted average HLB of all the nonionic surfactants in the wax finely dispersed composition is 12 to 13 or more, to the melting point of the wax or higher, and a method for producing the wax finely dispersed composition, In the melting temperature range, after going through the melting state, cooling to normal temperature, and then adding an ionic water-soluble thickener and a silicone oil and/or fluorine oil component which is liquid at normal temperature, thereby obtaining the product.