JP2021001135A - Whitish liquid composition - Google Patents

Abstract

To provide oil-in-water compositions in liquid form (particularly preferably, oil-in-water cosmetics) having a sufficiently whitish appearance and excellent emulsion stability.SOLUTION: A whitish liquid composition contains (a) polyoxyethylene phytosterol, (b) distearic acid polyethylene glycol, (c) polyoxyethylene behenyl ether, (d) oil solution, (e) monovalent lower alcohol, (f) polyhydric alcohol and (g) water, with a total content of components (a)-(c) to a content of component (d), ({(a) +(b) +(c)}/(d)), of 0.15-1.5.SELECTED DRAWING: None

Description

The present invention relates to a liquid composition having a cloudy appearance, and more particularly to an oil-in-water cosmetic having the characteristics.

Usually, cosmetics contain an oil agent as an ingredient for softening the skin.
However, since oils are generally lighter than the aqueous phase, in oil-in-water cosmetics, the phenomenon of oil droplets floating near the surface of the cosmetics and the phenomenon of oil droplets coalescing and separating from the system occur over time. Easy to get up. Since the quality of cosmetics generally deteriorates when creaming or separation occurs, various measures have been taken to suppress these phenomena in oil-in-water emulsified cosmetics.

For example, a method of suppressing the floating of oil droplets by adding a thickener to the aqueous phase to increase the viscosity of the aqueous phase, or a method of forming an α-gel phase around the oil droplets to combine the oil droplets. A method of suppressing one is widely used. Further, it is known that raising the internal oil phase ratio and adding a high amount of solid oil are also effective in suppressing the above phenomenon.

However, although the method of increasing the viscosity of the aqueous phase is suitable for producing a milky liquid or creamy cosmetic, it is difficult to produce a liquid cosmetic by the method. This is because the floating of oil droplets cannot usually be effectively suppressed with the low viscosity of liquid. Further, in the method for forming an α-gel phase, it has been pointed out that the constituent components (higher alcohols and higher fatty acids) of the α-gel tend to precipitate as crystals with time (for example, Non-Patent Document 1).
Furthermore, raising the internal oil phase ratio and adding a high amount of solid oil are also unsuitable for the production of liquid cosmetics. This is because if the internal oil phase ratio is raised so that the floating space of the oil droplets is almost eliminated, or if the solid oil content is too high, the system inevitably becomes milky or creamy.

As described above, there are many known methods for effectively suppressing creaming and separation in milky liquid or creamy oil-in-water compositions, but few are known to be effective for liquid oil-in-water compositions. It wasn't done.

Furthermore, in recent years, in the field of liquid cosmetics (particularly, lotion), an increasing number of consumers prefer a cloudy appearance. It is thought that this is because the cloudy liquid cosmetics evoke a moisturizing feeling, a moist feeling, a rich feeling, etc. for the skin than the transparent liquid cosmetics.
A cloudy cosmetic is generally produced by dispersing ethanol in which a surfactant and an oil are dissolved in an aqueous phase. However, in the manufacturing process, it is difficult to adjust the balance between the surfactant and the oil content, the degree of cloudiness is insufficient, and it is not easy to obtain a cloudy cosmetic having excellent stability over time.

For this reason, it has been strongly desired to produce an oil-in-water composition (particularly preferably an oil-in-water cosmetic) which is a liquid composition having a sufficiently cloudy appearance and has excellent emulsion stability.

Kei Watanabe et al., J. Oleo Sci., 61: 29-34 (2012)

The present invention has been made in view of the above-mentioned problems of the prior art, and is a liquid oil-in-water composition (particularly preferably an oil-in-water cosmetic) having a sufficiently cloudy appearance and excellent emulsion stability. The issue is to provide.

As a result of intensive research by the present inventors to solve the above problems, (a) polyoxyethylene phytosterol, (b) polyethylene glycol distearate, and (c) polyoxyethylene behenyl ether were used (d). ) The oil preparation is emulsified, and the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15. It has been found that a liquid cosmetic having a high degree of cloudiness can be easily produced by a conventional method by adjusting the content so as to be within the range of ~ 1.5.
Further, the specific gravity of the mixture of the components (a) to (d) is in the range of 0.990 to 1.045, and (e) a monovalent lower alcohol, (f) a polyhydric alcohol, and (g) water. When the specific gravity of the aqueous phase containing the above is in the range of 0.9910 to 1.018 times the specific gravity of the mixture of the components (a) to (d), the average emulsified particle size is 0.5 to 3.0 μm. It has been found that a liquid oil-in-water composition having a cloudy appearance within the range, excellent emulsification stability, and a viscosity at 30 ° C. of 500 mPa · S or less can be obtained.
Further, the present inventors have 0 in the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)). Under the condition of the range of .15 to 1.5, the components (a) to (c) are used to emulsify (d), and (h) a water-soluble polymer having a hydrophobic group is blended as an aqueous phase component. It was also found that the above-mentioned oil-in-water type composition of the above object could be obtained, and the present invention was completed.

That is, the present invention includes the following.
[1] (a) polyoxyethylene phytosterol, (b) polyethylene glycol distearate, (c) polyoxyethylene behenyl ether, (d) oil, (e) monohydric lower alcohol, (f) polyhydric alcohol, (G) Contains water and
The sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15 to 1.5. Within range,
Cloudy liquid composition.
[2] Further, the compounding amount ratio of the components (a) to (c) is in the range of (a) :( b) :( c) = 100: 1: 1 to 50:30: 30.
The cloudy liquid composition according to the above [1].
[3] Further, the specific gravity of the mixture of the components (a) to (d) is in the range of 0.990 to 1.045, and the specific gravity of the aqueous phase containing the components (e) to (g) is the above-mentioned component ( The average emulsified particle size of the oil droplets containing the components (a) to (d) is 0.5 to 3.0 μm within the range of 0.9910 to 1.018 times the specific gravity of the mixture of a) to (d). The viscosity at 30 ° C. is 500 mPa · S or less.
The cloudy liquid composition according to the above [1] or [2].
[4] (a) Polyoxyethylene phytosterol, (b) Polyethylene glycol distearate, (c) Polyoxyethylene behenyl ether, (d) Oil agent, (g) Water, (h) Water-soluble polymer having a hydrophobic group , Contains,
The sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15 to 1.5. Within range,
The average emulsified particle size of the oil droplet containing the components (a) to (d) is in the range of 0.5 to 3.0 μm.
The viscosity at 30 ° C. is 500 mPa · S or less.
Cloudy liquid composition.
[5] Further, the compounding amount ratio of the components (a) to (c) is in the range of (a) :( b) :( c) = 100: 1: 1 to 50:30: 30.
The cloudy liquid composition according to the above [4].
[6] (d) The cloudy liquid composition according to any one of [1] to [5] above, wherein the oil agent contains a silicone oil having a specific gravity greater than 1.
[7] The cloudy liquid composition according to the above [6], wherein the silicone oil is a silicone oil having one or more phenyl groups.
[8] The cloudy liquid composition according to any one of [4] to [7] above, wherein the hydrophobic group of the component (h) is an alkyl group.

INDUSTRIAL APPLICABILITY The present invention provides a liquid oil-in-water composition (and oil-in-water cosmetic) having a sufficiently cloudy appearance and excellent emulsion stability.

Hereinafter, preferred embodiments according to the present invention will be described.
The cloudy liquid composition according to the present disclosure is a composition in which emulsified particles composed of the components (a) to (d) are stably dispersed in the aqueous phase. The emulsified particles have a structure in which (d) an oil agent is surrounded by a gel phase composed of the components (a) to (d), and the average emulsified particle diameter is 0.5 to 3.0 μm. The characteristic of cloudiness of the composition of the present application is considered to be due to the fact that huge emulsified particles having an average emulsified particle diameter within the above range are stably dispersed in the aqueous phase. The viscosity is extremely low at 500 mPa · S or less at 30 ° C., and the composition is liquid at room temperature (20 ° C.).

As the first embodiment according to the present disclosure, the components (a) to (g) are contained, and the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + A cloudy liquid composition in which (b) + (c)} / (d)) is in the range of 0.15 to 1.5 is shown.

Further, as a second embodiment according to the present disclosure, in the first embodiment, the specific gravity of the mixture of the components (a) to (d) is further in the range of 0.990 to 1.045, and the component (e). A cloudy liquid composition in which the specific gravity of the aqueous phase containing (g) to (g) is in the range of 0.9910 to 1.018 times the specific gravity of the mixture of the components (a) to (d). In the composition, since the specific gravity of the aqueous phase is close to the specific gravity of the emulsified particles, the emulsified particles can be stably dispersed in the aqueous phase, and it is considered that high emulsification stability can be obtained.
The range of "0.9910 to 1.0018 times" may be further "0.9944 to 0.9981 times". This is because the emulsion stability is further improved.

As a third embodiment according to the present disclosure, the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) containing the components (a) to (d) and (g) ({{ A cloudy liquid composition in which (a) + (b) + (c)} / (d)) is in the range of 0.15 to 1.5 and further contains the component (h) is shown. In the composition, the hydrophobic group of the component (h) present in the aqueous phase interacts with the components (a) to (c) on the surface of the emulsified particles, so that the emulsified particles are stably dispersed in the aqueous phase. It is considered that high emulsion stability can be obtained.
In the third aspect, the components (e) and (f) may be further contained.

(A) Polyoxyethylene phytosterols Polyoxyethylene phytosterols can be suitably used in the cloudy liquid composition according to the present disclosure. (A) Polyoxyethylene phytosterols include those having an average number of moles of ethylene oxide added of 5 to 30.
Examples of suitable compounds are polyoxyethylene (5 mol) phytosterols (eg, Nikkol BPS-5), polyoxyethylene (10 mol) phytosterols (eg, Nikko Chemicals, Nikkol BPS-10). ), Polyoxyethylene (20 mol) phytosterol (for example, Nikko Chemicals Co., Ltd., Nikkol BPS-20), polyoxyethylene (30 mol) phytosterol (for example, Nikko Chemicals Co., Ltd., Nikkol BPS-30) and the like.

(B) Polyethylene Glycol Distearate Can be suitably used for the cloudy liquid composition according to the present disclosure. (B) Polyethylene glycol distearate includes those having an average number of moles of ethylene oxide added of 4 to 12.
Examples of suitable compounds include polyoxyethylene (4 mol) distearic acid (eg, Nippon Emulsion, Emalex 200DIS), polyoxyethylene (6 mol) distearic acid (eg, Nippon Emulsion, Emalex 300DIS), Examples thereof include polyoxyethylene (8 mol) distearic acid (for example, Emalex 400DIS manufactured by Nippon Emulsion Co., Ltd.) and polyoxyethylene (12 mol) distearic acid (for example, Emalex 600DIS manufactured by Japan Emulsion Co., Ltd.).

(C) Polyoxyethylene behenyl ether Can be suitably used for the cloudy liquid composition according to the present disclosure. (C) Polyoxyethylene behenyl ether has an average number of moles of ethylene oxide of 5 to 20. Can be mentioned.
Examples of suitable compounds include polyoxyethylene (5 mol) behenyl ether (eg, Nikkol BB-5), polyoxyethylene (10 mol) behenyl ether (eg, Nikko Chemicals, Nikkol BB). -10), polyoxyethylene (20 mol) behenyl ether (for example, manufactured by Nikko Chemicals Co., Ltd., Nikkol BB-20) and the like.

In the cloudy liquid composition according to the present disclosure, the compounding amount ratio of the components (a) to (c) is within the range of (a) :( b) :( c) = 100: 1: 1 to 50:30: 30. Is preferable. The total sum of the components (a) to (c) is not particularly limited, but is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.5% by mass in the composition.

(D) Oil agent The oil agent (d) in the cloudy liquid composition according to the present disclosure constitutes an oil phase as an internal phase, and includes an oil component and an oily component. The (d) oil agent that can be used in the cloudy liquid composition according to the present disclosure is not particularly limited, and an oil agent that is usually used for cosmetics and quasi-drugs can be appropriately used.
Examples of such oils include liquid fats and oils, solid fats and oils, waxes, hydrocarbon oils, higher fatty acids, synthetic ester oils, silicone oils and the like. Further, examples of the oil-based component include an ultraviolet absorber, an oil-soluble agent, a fragrance and the like.

Liquid fats and oils include, for example, 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, southern ka oil, castor oil, flaxseed oil. , Saflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, cinnamon oil, Japanese millet oil, jojoba oil, germ oil, triglycerin and the like.

Examples of solid fats and oils include cacao fat, coconut oil, horse fat, hardened coconut oil, palm oil, beef tallow, sheep fat, hardened beef tallow, palm kernel oil, lard, beef tallow, mokurou kernel oil, hardened oil, and cow. Examples include leg tallow, mokuro, and hydrogenated coconut oil.

Examples of waxes include honey wax, candelilla wax, cotton wax, carnauba wax, baby wax, ibotarou, whale wax, montan wax, lanolin, lanolin, capoc wax, lanolin acetate, liquid lanolin, sugar cane, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin. , Jojobaro, hard lanolin, cellac wax, polyoxyethylene lanolin alcohol ether, polyoxyethylene lanolin alcohol acetate, polyoxyethylene cholesterol ether, lanolin fatty acid polyethylene glycol, polyoxyethylene hydrogenated lanolin alcohol ether, cetyl palmitate and the like. ..

Examples of the hydrocarbon oil include liquid paraffin, ozokelite, squalane, pristane, paraffin, selecin, squalene, petrolatum, microcrystalline wax and the like.

Higher fatty acids include, for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylene acid, tollic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid ( DHA) and the like.

Examples of the synthetic ester oil include cetyl octanate, myristyl myristate, glyceryl tri2-ethylhexanoate, pentaerythrit tetra2-ethylhexanoate, dioctyl succinate, and tripropylene glycol dineopentanoate.

Examples of the silicone oil include chain polysiloxane (eg, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxane (eg, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexane). (Sasiloxane, etc.)) Silicone resin, silicone rubber, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) forming a three-dimensional network structure, acrylic silicone Kind and the like.

Silicone oil is generally an oil agent that is desired to be highly blended in cosmetics because it has an excellent effect of enhancing the feeling of use of the composition. However, it is difficult to emulsify silicone oil with an emulsifier other than a silicone-based surfactant, and oil-in-water emulsified particles obtained by emulsifying with a silicone-based surfactant are generally easy to float due to their large particle size ( It is easy to cream). That is, it has not been easy to produce a liquid oil-in-water emulsification composition containing a large amount of silicone oil, having a cloudy appearance, and having excellent emulsion stability.

By using the technique according to the present invention, it is possible to produce a liquid oil-in-water composition having an excellent emulsion stability and a cloudy appearance while containing a large amount of silicone oil.
In particular, silicone oil having a specific gravity of more than 1 can be expected to have an effect of limiting the floating of oil droplets, and is therefore a component that is positively blended in a liquid oil-in-water composition. Examples of such silicone oils include silicone oils having one or more phenyl groups, and specific compounds include methylphenylpolysiloxane, diphenylsiloxyphenyltrimethicone, diphenyldimethicone and the like.
In the cloudy liquid composition according to the present disclosure, (d) 0%, 10%, 20%, 30%, 40%, and 50% of the oil agent may be a silicone oil having a specific gravity greater than 1.

Examples of the ultraviolet absorber include silicic acid-based ultraviolet absorbers such as octyl paramethoxysilicate, isopropyl paramethoxysilicate, and mono-2-ethylhexarate diparamethoxysilicate, and paraaminobenzoic acid. Benzoic acid-based UV absorbers, anthranilic acid-based UV absorbers such as methyl anthranilate, salicylic acid-based UV absorbers such as octyl salicylate and phenyl salicylate, 4-tert-butyl-4'-methoxybenzoylmethane, 2-ethylhexyl 2 −Cyano-3,3-diphenylacrylate and the like can be mentioned.

Examples of the oil-soluble drug include oil-soluble vitamins such as vitamin A (retinol), vitamin D, vitamin E, vitamin K and derivatives thereof (vitamin A oil, retinol palmitate, etc.), and water-soluble vitamin C, arbutin, etc. Examples thereof include oil-soluble derivatives of sex agents (vitamin C palmitate, etc.), oil-soluble plant extracts, oil-soluble fragrances, substances whose surface has been hydrophobized, cyclosporin, and the like.

As the fragrance, any of natural fragrances obtained from animals or plants, synthetic fragrances produced by chemical synthesis means, and compound fragrances which are mixtures thereof can be used.

The blending amount of the (d) oil agent in the cloudy liquid composition according to the present disclosure may be 0.01 to 10% by mass, and further may be 0.1 to 1% by mass. Further, (d) the oil agent may be used alone or in combination of two or more.
In the cloudy liquid composition according to the present disclosure, the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)). Is preferably in the range of 0.15 to 1.5. If the value is less than 0.15, emulsification may be difficult, and if it exceeds 1.5, it may not be cloudy.

(E) Monohydric lower alcohol Can be suitably used for the cloudy liquid composition according to the present disclosure. (E) The monohydric lower alcohol is not particularly limited, and can be used for cosmetics and quasi-drugs. Those usually used can be blended. Examples of specific compounds include ethanol, propanol, isopropanol and the like. Of these, ethanol can be used particularly preferably.
The blending amount of the (e) monohydric lower alcohol in the cloudy liquid composition according to the present disclosure may be 1 to 30% by mass, and further may be 5 to 20% by mass. Further, as the component (e), one kind or a combination of two or more kinds of compounds can be used.

(F) Multivalent alcohol Can be suitably used for the cloudy liquid composition according to the present disclosure. (F) The polyhydric alcohol is not particularly limited and is usually used for cosmetics and quasi-drugs. Can be blended. Examples of specific compounds include divalent alcohols (eg, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol). , Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.; trivalent alcohol (eg, glycerin, trimethylolpropane, etc.); tetravalent alcohol (eg, 1,2, Pentaerythritol such as 6-hexanetriol); pentavalent alcohol (eg, xylitol, etc.); hexavalent alcohol (eg, sorbitol, mannitol, etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, triethylene glycol, etc.) , Polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.; divalent alcohol alkyl ethers (eg, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether) , Ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether Etc.); Dihydric alcohol alkyl ethers (eg, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol mono Ethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol Butyl ether, etc.); Dihydric alcohol ether esters (eg, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diazibate, ethylene glycol dissuccinate, Diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc.; glycerin monoalkyl ether (eg, xyl alcohol, etc.) Ceraquil alcohol, bacil alcohol, etc.); Sugar alcohols (eg, sorbitol, martitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch-degrading sugar, maltose, xylitol, starch-degrading sugar-reducing alcohol, etc.); Glysolid; Tetrahydrofurfuryl alcohol; POE-Tetrahydrofurfuryl alcohol; POP-butyl ether; POP / POE-butyl ether; Tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphoric acid; POP / POE-pentane Examples thereof include erythritol ether and polyglycerin.
Of these, 2-3-valent alcohols are preferable, and dipropylene glycol, 1,3-butylene glycol, and glycerin are particularly preferable.

The blending amount of the (f) polyhydric alcohol in the cloudy liquid composition of the present disclosure may be 1 to 30% by mass, and further may be 5 to 20% by mass. Further, as the component (f), one kind or a combination of two or more kinds of compounds can be used.

(G) Water Can be suitably used for the cloudy liquid composition according to the present disclosure. (G) Water can be blended with those usually used for cosmetics and non-medicinal products, for example, distilled water. Examples thereof include reverse osmosis water, purified water such as ion-exchanged water, and tap water.

(H) Water-soluble polymer having a hydrophobic group Can be suitably used for the cloudy liquid composition according to the present disclosure. (H) The water-soluble polymer having a hydrophobic group includes, for example, natural or semi-synthetic highly water-soluble polymer. Examples thereof include those in which a hydrophobic group such as an alkyl group is introduced into a molecular or synthetic water-soluble polymer. The alkyl group preferably has 6 or more carbon atoms, preferably 8 or more carbon atoms, and more preferably 10 or more carbon atoms.

Natural or semi-synthetic water-soluble polymers include, for example, starch-based polymers such as carboxymethyl starch and methyl hydroxypropyl starch; methyl cellulose, nitro cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, cellulosic sodium sulfate, hydroxypropyl. Examples thereof include cellulosic cellulose, sodium carboxymethyl cellulose (CMC), crystalline cellulose, and cellulosic polymers such as cellulosic powder.

Examples of the synthetic water-soluble polymer include vinyl-based polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer (carbomer); and polyoxyethylene-based polymers such as polyethylene glycol (molecular weights 1500, 4000, 6000). Polymer; Polyoxyethylene polyoxypropylene copolymer copolymer polymer; Acrylic polymer such as sodium polyacrylate, polyethyl acrylate, polyacrylamide compound, acrylic acid / alkyl methacrylate copolymer; polyethylene imine, Cationic polymers and the like can be mentioned.

In the cloudy liquid composition according to the present disclosure, an alkyl-modified carboxyvinyl polymer (acrylic acid / alkyl methacrylate copolymer) can be preferably used as the component (h). Specific compounds include (Acrylate / alkyl acrylate (C10-30)) crosspolymers, and commercially available products include Carbopol 1342, PEMULEN TR-1, and PEMULEN TR-2 (all BFs). (Manufactured by Goodrich Corporation).

The amount of the water-soluble polymer having a hydrophobic group (h) in the cloudy liquid composition according to the present disclosure may be 0.001 to 1% by mass, preferably 0.01 to 0.1% by mass. Further, as the component (h), one kind or a combination of two or more kinds of compounds may be used.

In addition, one or more surfactants may be appropriately added to the cloudy liquid composition according to the present disclosure for the purpose of adjusting usability. Such a surfactant is not particularly limited, and for example, a hydrophilic nonionic surfactant, a lipophilic nonionic surfactant, an amphoteric surfactant and the like can be blended.
The blending amount of the surfactant in the cloudy liquid composition according to the present disclosure is preferably 0.001 to 1% by mass, more preferably 0.01 to 0.1% by mass.

In addition to the above components, the cloudy liquid composition according to the present disclosure includes components usually used in cosmetics, such as moisturizers, thickeners, powders, alcohols other than components (e) and (f), and natural polymers. , Synthetic polymers, sugars, antioxidants, buffers, various extracts, stabilizers, preservatives, pigments and the like can be appropriately blended as long as the effects of the present invention are not impaired.

The cloudy liquid composition according to the present disclosure is an oil-in-water composition. In particular, it can be suitably provided as an oil-in-water type cosmetic, and specific dosage forms include a lotion, a beauty essence, and an impregnated mask.

The appearance of the liquid composition according to the present disclosure is milky white and cloudy. The characteristic of cloudiness can be easily confirmed visually, but it can also be determined by measuring the L value (transparency. The closer the L value is to 100, the more transparent) is measured using a spectrophotometer. This measurement of the L value is usually used for measuring the color difference, but this is because the L value and the white turbidity have a correlation and can be used as a guideline for the white turbidity.
In the liquid composition according to the present disclosure, the L value is preferably 45 or less, more preferably about 30 or less, still more preferably 20 or less, and particularly preferably 10 or less. In the present invention, when the L value is 20 or less, it is determined that the white turbidity is high.

The cloudy liquid composition according to the present disclosure can be produced by a conventional method. For example, it can be obtained by slowly adding and emulsifying the oil phase component to the aqueous phase component while mixing and stirring with a homomixer or the like. However, the method is not limited to this example method.

The present invention will be described in more detail with reference to specific examples below, but the present invention is not limited to the following examples. The blending amount in the following test examples is mass% unless otherwise specified.
First, the evaluation method used in the examples of the present application will be described.

-Emulsification stability After storing each composition at room temperature (about 20 ° C.) for 2 weeks, the state of the composition was visually observed and the emulsion stability was evaluated according to the following criteria.
A: No creaming or separation was observed.
B: Very slight creaming was observed.
C: Some creaming was observed, but it became uniform easily when shaken a little.
D: Some creaming or separation was observed.
E: Remarkable creaming or separation was observed.
In the present invention, it is determined that the emulsion stability is excellent when it is AC, and it is determined that the emulsion stability is very excellent especially when it is A.

-Average emulsified particle size The average emulsified particle size of the composition immediately after production was measured using a particle size measuring device LA-950V2 (manufactured by Horiba Seisakusho Co., Ltd.).

-L value The L value of each composition was measured using a spectrophotometer SE7700 (manufactured by Nippon Denshoku Industries Co., Ltd.).

-Viscosity After keeping each composition warm at 30 ° C. for 60 minutes, the viscosity was measured using a B-type rotational viscometer (Bismetron viscometer, manufactured by Shibaura System Co., Ltd.).

Test Example 1: Examination of Composition Containing Components (a) to (g) Six types of oil phase parts (X1 to X6) having the compositions shown in Table 1 and the aqueous phase having the compositions shown in Tables 2 and 3. 16 types of parts (Y1 to Y16) were manufactured, and the specific gravity of each part was measured. By combining one type of oil phase part and one type of aqueous phase part, a total of 68 kinds of oil-in-water type compositions were produced according to a conventional method. The mixing ratio (mass ratio) of the oil phase part and the water phase part is oil phase part: water phase part = 1:10.
For the obtained composition, the value obtained by dividing the specific gravity of the aqueous phase part by the specific gravity of the oil phase part (= specific gravity of the aqueous phase part / specific gravity of the oil phase part) is calculated, and the emulsification stability is calculated according to the method described above. (Room temperature, 2 weeks) was measured. The results are shown in Tables 4 and 5.

The L values of the compositions shown in Tables 4 and 5 were all 20 or less, and all of them were liquid compositions having a high degree of white turbidity.
Therefore, the components (a) to (g) are blended, and the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / It was shown that a liquid composition having a high degree of white turbidity can be obtained by adjusting (d)) so as to be in the range of 0.15 to 1.5.

Further, the specific gravity of the mixture of the components (a) to (d) is in the range of 0.990 to 1.045, and the specific gravity of the aqueous phase part is 0.9910 to 1.018 times the specific gravity of the oil phase part. The composition (37 types) was excellent in emulsion stability, and the composition (13 types) having a specific gravity of 0.9944 to 0.9981 was very excellent in emulsion stability.
Of the compositions whose emulsification stability was "A" in Tables 4 and 5, nine types obtained by using X1 to X4 as oil phase parts were further subjected to the L value, average emulsified particle size, and viscosity. The measurement results are shown in Table 6.

As shown in Table 6, in the compositions (Test Examples 1 to 9) having very excellent emulsification stability, the L value was 20 or less within the range of 0.5 to 3.0 μm in average emulsified particle size. The viscosity at 30 ° C. was 500 mPa · S or less, and it was a smooth liquid.

Therefore, (a) polyoxyethylene phytosterol, (b) polyethylene glycol distearate, (c) polyoxyethylene behenyl ether, (d) oil, (e) monohydric lower alcohol, (f) polyhydric alcohol, and (G) Water is blended, and the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0. .15 to 1.5, and the specific gravity of the mixture of components (a) to (d) is in the range of 0.990 to 1.045, and the components (e) to (g). When the specific gravity of the aqueous phase containing the above is in the range of 0.9910 to 1.018 times the specific gravity of the mixture of the components (a) to (d), the average emulsified particle size is 0.5 to 3.0 μm. It was shown that a white turbid liquid composition having a high degree of white turbidity within the range and a viscosity at 30 ° C. of 500 mPa · S or less and excellent emulsion stability can be produced.

Test Example 2: Examination of the composition containing the components (a) to (d), (g), and (h) Next, the effect of blending the water-soluble polymer was examined.
The oil-in-water composition according to the formulation shown in Table 7 was produced according to a conventional method, and the items in the table were evaluated according to the above-mentioned method. The results are shown in Table 7.

As shown in Table 7, when a water-soluble polymer having an alkyl group as a hydrophobic group (Acrylate / alkyl acrylate (C10-30)) is blended, the emulsion stability is very high, and the average A cloudy liquid composition having an emulsified particle size in the range of 0.5 to 3.0 μm and a very low L value and viscosity was obtained (Test Example 10), whereas it had a hydrophobic group. Xanthan gum (Test Example 11), carboxyvinyl polymer (Test Example 12), (Acrylate / steareth methacrylate-20) copolymer (Test Example 13), and stearoxyhydroxypropylmethyl cellulose having a stearyl group as a hydrophobic group (Test Example). When 14) was blended, the result was that the emulsion stability was inferior.

Therefore, the sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15 to 1.5. In addition to (a) polyoxyethylene phytosterol, (b) polyethylene glycol distearate, (c) polyoxyethylene behenyl ether, (d) oil, and (g) water, in the case of being within the range of (h). ) Even by blending a water-soluble polymer having a hydrophobic group, the white turbidity is high within the range of 0.5 to 3.0 μm in average emulsified particle size, and the viscosity at 30 ° C. is 500 mPa · S or less. It was shown that a cloudy liquid composition having excellent emulsion stability can be produced.

Claims (8)

(A) Polyoxyethylene phytosterol (b) Polyethylene glycol distearate (c) Polyoxyethylene behenyl ether (d) Oil agent (e) Monohydric lower alcohol (f) Polyhydric alcohol (g) Water is contained.
The sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15 to 1.5. Within range,
Cloudy liquid composition. Further, the first aspect of the present invention, wherein the compounding amount ratio of the components (a) to (c) is in the range of (a) :( b) :( c) = 100: 1: 1 to 50:30:30. White turbid liquid composition. Further, the specific gravity of the mixture of the components (a) to (d) is in the range of 0.990 to 1.045.
The specific gravity of the aqueous phase containing the components (e) to (g) is within the range of 0.9910 to 1.018 times the specific gravity of the mixture of the components (a) to (d).
The average emulsified particle size of the oil droplet containing the components (a) to (d) is in the range of 0.5 to 3.0 μm.
The viscosity at 30 ° C. is 500 mPa · S or less.
The cloudy liquid composition according to claim 1 or 2. (A) Polyoxyethylene phytosterol (b) Polyethylene glycol distearate (c) Polyoxyethylene behenyl ether (d) Oil agent (g) Water (h) A water-soluble polymer having a hydrophobic group is contained.
The sum of the blending amounts of the components (a) to (c) with respect to the blending amount of the component (d) ({(a) + (b) + (c)} / (d)) is 0.15 to 1.5. Within range,
The average emulsified particle size of the oil droplet containing the components (a) to (d) is in the range of 0.5 to 3.0 μm.
The viscosity at 30 ° C. is 500 mPa · S or less.
Cloudy liquid composition. Further, the fourth aspect of the present invention, wherein the compounding amount ratio of the components (a) to (c) is within the range of (a) :( b) :( c) = 100: 1: 1 to 50:30:30. White turbid liquid composition. (D) The cloudy liquid composition according to any one of claims 1 to 5, wherein the oil agent contains a silicone oil having a specific gravity greater than 1. The cloudy liquid composition according to claim 6, wherein the silicone oil is a silicone oil having one or more phenyl groups. The cloudy liquid composition according to any one of claims 4 to 7, wherein the hydrophobic group of the component (h) is an alkyl group.