Cosmetic

Abstract

Provided is a cosmetic having an excellent feeling of use and an excellent appearance. This oil-in-water cosmetic contains (A) a hydrophobically modified polyether polyurethane, (B) a carboxyvinyl polymer, (C) a polyoxyalkylene-modified silicone, (D) an oil, (E) an aqueous component selected from a monohydric alcohol and a dihydric alcohol, and (F) water.

Description

Technical Field

[0001] The present invention relates to an oil-in-water type cosmetic having excellent usability and little stickiness. Background Art

[0002] In cosmetics, an oily component is blended according to the purpose. When an oily component is blended into a water-based cosmetic, an oil-in-water type cosmetic in which the oily component is dispersed in water may be prepared. Various cosmetics in which an oily component is dispersed in water are known, but it is difficult to simultaneously satisfy various properties such as stability, usability, and transparency, and further improvement is desired.

[0003] On the other hand, oil-in-water type cosmetics for the purpose of exerting the functions of pharmaceuticals and the like contained in the oily component are applied to various uses, and oil-in-water type cosmetics having various viscosities have been developed. In cosmetics having a high viscosity, the usability may not be satisfied in terms of stickiness and the like. In oil-in-water type cosmetics, the usability may be impaired due to the oily component, and further improvement of the usability is also required.

[0004] Furthermore, most cosmetics having a high viscosity are in the form of a gel or a cream. In cleansing agents and mask cosmetics, a texture and a sense of luxury may be obtained from the appearance in the container or after being taken out of the container, and improvement of the appearance of the gel and the cream is also desired.

[0005] Based on such a background, further improvement is required for the usability, appearance, and the like of oil-in-water type cosmetics.

[0006] Prior Art Documents

[0007] Patent Documents

[0008] Patent Document 1: International Patent Application Publication No. 2019 / 082796 Summary of the Invention

[0009] The present inventors have found that by using specific materials in combination in an oil-in-water type cosmetic, the usability and appearance can be improved. The present invention is based on such an insight.

[0010] According to the present invention, the following inventions are provided.

[0011] [1] An oil-in-water type cosmetic comprising:

[0012] (A) A hydrophobically modified polyether polyurethane,

[0013] (B) A carboxyvinyl polymer,

[0014] (C) A polyoxyalkylene-modified silicone,

[0015] (D) An oil,

[0016] (E) An aqueous component selected from monohydric alcohols and dihydric alcohols, and

[0017] (F) Water,

[0018] (i) When the component (E) is a single monohydric alcohol, its content is 1 to 15% by mass based on the total mass of the aforementioned cosmetic,

[0019] (ii) When the component (E) is a single dihydric alcohol, its content is 1 to 20% by mass based on the total mass of the aforementioned cosmetic,

[0020] (iii) When the component (E) is a combination of a monohydric alcohol and a dihydric alcohol, their total content is 1 to 45% by mass based on the total mass of the aforementioned cosmetic. [2]

[0022] The cosmetic according to [1], wherein the component (A) is the component represented by the following formula (a):

[0023]

[0024] (In the formula, R a1 、R a2 and R a4 are each independently a hydrocarbon group having 2 to 4 carbon atoms,

[0025] R a3 is a hydrocarbon group having 1 to 10 carbon atoms optionally having a urethane bond,

[0026] R a5 is a hydrocarbon group having 8 to 36 carbon atoms,

[0027] a1 is an integer from 1 to 500,

[0028] a2 is an integer from 1 to 200,

[0029] a3 is an integer of 1 or more,

[0030] a4 is an integer of 2 or more.). [3]

[0032] The cosmetic according to [1] or [2], wherein the component (A) is PEG-240 / HDI copolymer bis-decyldodeceth-20. [4]

[0034] The cosmetic according to any one of [1] to [3], wherein the component (C) is PEG-12 dimethicone. [5]

[0036] The cosmetic according to any one of [1] to [4], wherein, based on the total mass of the cosmetic, the content of component (A) is 0.5 to 3% by mass. [6]

[0038] The cosmetic according to any one of [1] to [5], wherein, based on the total mass of the cosmetic, the content of component (B) is 0.02 to 1% by mass. [7]

[0040] The cosmetic according to any one of [1] to [6], wherein, based on the total mass of the cosmetic, the content of component (C) is 0.05 to 5% by mass. [8]

[0042] The cosmetic according to any one of [1] to [7], wherein, based on the total mass of the cosmetic, the content of component (D) is 3 to 30% by mass. [9]

[0044] The cosmetic according to any one of [1] to [8], wherein, based on the total mass of the cosmetic, the total content of component (A) and component (C) is 0.6 to 3% by mass.

[10]

[0046] The cosmetic according to any one of [1] to [9] has a viscosity of 10,000 mPa·s or more at 30°C.

[0047] According to the present invention, there is provided a water-soluble cosmetic with less stickiness and excellent usability. In addition, when the viscosity of the cosmetic is relatively high, it can also achieve an appearance with a texture like a plump feeling. Detailed Description of the Invention

[0048] Hereinafter, embodiments of the present invention will be described in detail.

[0049] [Oil-in-water type cosmetic]

[0050] The oil-in-water type cosmetic of the present invention contains:

[0051] (A) Hydrophobically modified polyether polyurethane,

[0052] (B) Carboxyvinyl polymer,

[0053] (C) Polyoxyalkylene-modified silicone,

[0054] (D) Oil,

[0055] (E) An aqueous component selected from monohydric alcohols and dihydric alcohols, and

[0056] (F) Water. Hereinafter, each component will be described.

[0057] [(A) Hydrophobically modified polyether polyurethane]

[0058] The cosmetic of the present invention contains a hydrophobically modified polyether polyurethane (hereinafter sometimes referred to as component (A)). Component (A) is a material also known as an associative thickener, associative polymer, etc., and produces a thickening effect by the hydrophobic groups in the molecule associating with the hydrophobic groups of other molecules.

[0059] Such associative thickeners can be arbitrarily selected and used from conventionally known associative thickeners, and preferably an associative thickener represented by the following formula (a).

[0060]

[0061] (In the formula, R a1 , R a2 and R a4 are each independently a hydrocarbon group having 2 to 4 carbon atoms, preferably a saturated hydrocarbon group having 2 to 4 carbon atoms;

[0062] R a3 is a hydrocarbon group having 1 to 10 carbon atoms optionally having a urethane bond;

[0063] R a5 is a hydrocarbon group having 8 to 36 carbon atoms, preferably a hydrocarbon group having 12 to 24 carbon atoms;

[0064] a1 is an integer from 1 to 500, preferably an integer from 100 to 300;

[0065] a2 is an integer from 1 to 200, preferably an integer from 10 to 100;

[0066] a3 is an integer of 1 or more, preferably 1;

[0067] a4 is an integer of 2 or more, preferably 2.)

[0068] As a preferred example of component (A), polyethylene glycol-decyltetradecyl ether-hexamethylene diisocyanate copolymer can be mentioned. As a particularly preferred example, a hydrophobically modified polyether polyurethane having the INCI name "PEG-240 / HDI COPOLYMER BISDECYLTETRADECETH-20ETHER" can be mentioned. This copolymer is commercially available under the trade name "ADEKANOL GT-700" from ADEKA Corporation.

[0069] The content of the component (A) contained in the cosmetic is not particularly limited. Based on the total mass of the cosmetic, the content of the component (A) is preferably 0.5 to 3% by mass, more preferably 0.8 to 2% by mass.

[0070] [(B) Carboxyvinyl polymer]

[0071] The cosmetic of the present invention may further contain a carboxyvinyl polymer (hereinafter sometimes referred to as component (B)). Such a carboxyvinyl polymer is generally used as a thickener for cosmetics and is a polymer containing acrylic acid in the monomer unit. Such a carboxyvinyl polymer is generally sold on the market, such as HIVIS WAKO (trade name, manufactured by Wako Pure Chemical Industries, Ltd.), SYNTHALEN (trade name, manufactured by 3V SIGMA Corporation), Carbopol (trade name, manufactured by Goodrich Corporation), etc. Component (B) is a crosslinked polymer having a chemically crosslinked structure and has a high thickening effect. Moreover, by using component (A) and component (B) in combination, it is possible to suppress the stickiness of the cosmetic and improve the usability, and further achieve excellent aesthetics in high-viscosity cosmetics. It should be noted that in the present invention, the carboxyvinyl polymer preferably uses a carboxyvinyl polymer whose carboxyl group is not modified, but a modified carboxyvinyl polymer such as an alkyl-modified carboxyvinyl polymer may also be used as needed.

[0072] The content of the component (B) contained in the cosmetic is not particularly limited. Based on the total mass of the cosmetic, the content of the component (B) is preferably 0.02 to 1% by mass, more preferably 0.05 to 0.5% by mass.

[0073] [(C) Polyoxyalkylene-modified silicone]

[0074] In the cosmetic of the present invention, the polyoxyalkylene-modified silicone (hereinafter sometimes referred to as component (C)) is a water-soluble silicone surfactant obtained by replacing a part of the methyl groups of polydimethylsiloxane with polyethylene glycol. It has excellent emulsifying action, dispersing action, and permeating action, and is widely used in the cosmetic field and is represented by the following general formula (c).

[0075]

[0076] (In the formula, R c1 are each independently hydrogen or an alkyl group having 1 to 6 carbon atoms;

[0077] R c2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or a polyoxyalkylene represented by the formula (c0), hydrogen, or an alkyl group having 1 to 6 carbon atoms;

[0078] -(CH2) a -(C2H4O) b-(C3H6O) c -R c3 (c0)

[0079] (wherein, R c3 is hydrogen or an alkyl group having 1 to 6 carbon atoms,

[0080] a is an integer from 1 to 6,

[0081] b is an integer from 0 to 50,

[0082] c is an integer from 0 to 50,

[0083] and b + c is at least 5 or more.)

[0084] At least one of the aforementioned Rs c2 is the aforementioned polyoxyalkylene;

[0085] m is an integer from 1 to 200;

[0086] n is an integer from 0 to 50.)

[0087] Moreover, in the component (C), PEG-12 polydimethylsiloxane in which c is 0 and b is 12 in the formula (c0) is particularly preferred. As commercially available products of PEG-12 polydimethylsiloxane, DOWSIL ES-5373 (manufactured by Dow Toray Co., Ltd.), SH3772M, SH3773M, SH3775M (all manufactured by Dow Corning Silicone), IM-22 (manufactured by Wacker Chemical) and the like can be mentioned.

[0088] The content of the component (C) contained in the cosmetic is not particularly limited. Based on the total mass of the cosmetic, the content of the component (C) is preferably 0.05 to 5% by mass, more preferably 0.5 to 3% by mass.

[0089] In addition, based on the total mass of the cosmetic, the total content of the component (A) and the component (C) is preferably 0.6 to 3% by mass.

[0090] [(D) oil]

[0091] The cosmetic of the present invention contains an oil (hereinafter sometimes referred to as component (D)). The component (D) can be a non-polar oil or a polar oil. Specific examples of the oil used as the component (D) are:

[0092] Silicone oils (such as dimethylpolysiloxane, diphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, decamethylcyclohexasiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.);

[0093] Hydrocarbon oils (such as liquid paraffin, ozokerite, squalane, petrolatum, microcrystalline wax, etc.);

[0094] Ester oils (such as isopropyl myristate, cetyl ethylhexanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl dimethyloctanoate, cetyl lactate, myristyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, cholesteryl 12 - hydroxystearate, ethylene glycol di - 2 - ethylhexanoate, dipentaerythritol fatty acid ester, N - alkyldiol monoisostearate, neopentyl glycol didecanoate, diisostearyl malate, glycerol tri - 2 - heptylundecanoate, trimethylolpropane tris(2 - ethylhexanoate), trimethylolpropane triisostearate, glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl - 2 - ethylhexanoate, 2 - ethylhexyl palmitate, glyceryl trimyristate, glycerol tri - 2 - heptylundecanoate, methyl ricinoleate, oleyl oleate, acetylated glyceride, 2 - heptylundecyl palmitate, di(2 - heptylundecyl) adipate, diisobutyl adipate, N - lauroyl - L - glutamic acid 2 - octyldodecyl ester, ethyl laurate, di - ethylhexyl sebacate, 2 - hexyldecyl myristate, 2 - hexyldecyl palmitate, 2 - hexyldecyl adipate, diisopropyl sebacate, 2 - ethylhexyl succinate, triethyl citrate, etc.).

[0095] The content of the component (D) contained in the cosmetic is not particularly limited. Based on the total mass of the cosmetic, the content of the component (D) is preferably 3 to 30% by mass, more preferably 5 to 20% by mass.

[0096] [(E) aqueous component]

[0097] The cosmetic of the present invention contains, in addition to water described later, an aqueous component that forms an aqueous layer. This aqueous component is an aqueous component selected from monohydric alcohols and dihydric alcohols (hereinafter, sometimes referred to as component (E)).

[0098] Monohydric alcohols refer to ethanol, n - propanol, isopropanol, etc., and ethanol is preferred among them. Dihydric alcohols refer to 1,3 - butanediol, dipropylene glycol, etc., and dipropylene glycol is preferred. These alcohols change the surfactant containing polyether - modified silicone to hydrophilic through a solvent effect. As a result, it is considered that the vesicles formed by the components (A) to (C) form disc - shaped micelles and adhere to the surface of the droplets of the component (D), forming a preferred dispersed state.

[0099] The content of the component (E) is not particularly limited, and an appropriate amount varies depending on whether the component (E) is a monohydric alcohol or a dihydric alcohol. Specifically:

[0100] (i) When the component (E) is a single monohydric alcohol, its content is 1 to 15% by mass based on the total mass of the aforementioned cosmetic;

[0101] (ii) When the component (E) is a single dihydric alcohol, its content is 1 to 20% by mass based on the total mass of the aforementioned cosmetic;

[0102] (iii) When the component (E) is a combination of a monohydric alcohol and a dihydric alcohol, their total content is 1 to 45% by mass based on the total mass of the aforementioned cosmetic.

[0103] In order to maintain a good dispersion state, the concentration of the monohydric alcohol and the concentration of the dihydric alcohol preferably satisfy the following formula (1).

[0104] [Concentration of monohydric alcohol (% by mass)] / 15 + [Concentration of dihydric alcohol (% by mass)] / 20 ≤ 1 (1)

[0105] [(F) Water]

[0106] In addition to the above components, the cosmetic of the present invention further contains water. As the water, the water used in cosmetics, quasi-drugs, etc. can be used. For example, purified water, ion-exchanged water, tap water, etc. can be used.

[0107] [Other components]

[0108] In the present invention, in the cosmetic, in addition to the above components, any components commonly used in cosmetics and pharmaceuticals can be further incorporated. As the optional components, the following components can be cited. As long as the effects of the present invention are exerted, one or more than two kinds can be incorporated.

[0109] The cosmetic of the present invention can, for example, contain a humectant. As the humectant, for example, glycerin, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, sulfated mucopolysaccharide, trichosanthic acid, telopeptide collagen, cholesteryl 12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, Rosa roxburghii fruit extract, Achillea millefolium extract, thymol extract, etc. It should be noted that the above-mentioned dihydric alcohols, such as propylene glycol and 1,3-butanediol, also have a humectant function.

[0110] The cosmetic of the present invention can contain a pH regulator in order to inhibit the irritation when applied to the skin or to improve the stability of the cosmetic. As the pH regulator, for example, buffers such as lactic acid - sodium lactate, citric acid - sodium citrate, succinic acid - sodium succinate, etc. can be cited. As vitamins, for example, vitamins A, B1, B2, B6, C, E and their derivatives, pantothenic acid and its derivatives, biotin, etc. can be cited.

[0111] As other components that can cooperate with each other, examples thereof include thickeners, surfactants, pH regulators other than components (A) and (B); metal ion chelating agents (such as disodium ethylenediaminetetraacetate); antioxidants (tocopherol, sulfites, metabisulfites, etc.); water-soluble polymers; saccharides; preservatives (phenoxyethanol, ethylparaben, butylparaben, etc.); anti-inflammatory agents (such as glycyrrhic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents other than semen platycladi (such as (animal) placental protein, saxifraga stolonifera extract, arbutin, etc.); various extracts (such as phellodendron bark, coptis japonica, purple gromwell root, peony, swertia japonica, birch, sage, loquat fruit / leaf, carrot, aloe, mallow, iris germanica, grape fruit, coix seed, loofah, white lily bulb, saffron flower, ligusticum wallichii root, ginger root, hypericum erectum, orobanchia pycnostachya root, garlic bulb, pepper, satsuma mandarin peel, angelica acutiloba, seaweed, etc.), activators (such as royal jelly, phytochrome, cholestanol derivatives, etc.), etc.

[0112] The dosage form of the cosmetic of the present invention is not particularly limited, and liquid, emulsion, cream, gel, solid and other forms can be adopted. However, when it is in the form of a cream or gel with a relatively high viscosity, it tends to have an excellent appearance. From this point of view, the viscosity measured at 30 °C using a B-type rotational viscometer is preferably 10,000 mPa·s or more, more preferably 25,000 mPa·s or more.

[0113] According to the present invention, there is provided a water-soluble cosmetic with less stickiness and excellent usability. In addition, when the viscosity of the cosmetic is relatively high, it can also achieve a textured appearance.

[0114] Examples

[0115] The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the blending amounts are expressed as mass % relative to the total amount.

[0116] [Examples 1 to 7 and Comparative Examples 1 to 3]

[0117] Cosmetics of Examples 1 to 7 and Comparative Examples 1 to 3 were prepared according to the formulations shown in Table 1.

[0118] [Evaluation]

[0119] The cosmetics of the examples and comparative examples were evaluated as follows. The evaluation results are shown in Table 1.

[0120] [Viscosity]

[0121] The viscosity was measured using a B-type viscometer under the conditions of 30 °C and a rotational speed of 10 revolutions per minute, and evaluated according to the following criteria.

[0122] A: The viscosity immediately after formulation is 30,000 mPa·s or more

[0123] B: The viscosity immediately after formulation is 10,000 mPa·s or more and less than 30,000 mPa·s

[0124] C: The viscosity immediately after formulation is less than 10,000 mPa·s

[0125] [Fullness feeling]

[0126] A: There is a strong fullness feeling (solidified mucus-like)

[0127] B: There is a fullness feeling (mucus-like)

[0128] C: There is no fullness feeling

[0129] [Use feeling]

[0130] When the cosmetic is applied to the skin, the oil component is felt, and then, the skin is evaluated based on the following criteria as to whether it is covered with a film or whether a use feeling is obtained.

[0131] A: Strongly felt

[0132] B: Felt

[0133] C: Slightly felt

[0134] D: Not felt at all

[0135] [Formulation evaluation]

[0136] The appearance when taken out from the tube is observed and evaluated based on the following criteria.

[0137] A: The viscosity immediately after formulation is about 30,000 mPa·s or more and there is a fullness feeling

[0138] B: The viscosity immediately after formulation is about 20,000 mPa·s and there is a fullness feeling

[0139] C: The viscosity immediately after formulation is about 10,000 mPa·s or less and the fullness feeling is poor

[0140] [Table 1]

[0141] Table 1

[0142]

[0143] The following shows formulation examples suitable as the cosmetic of the present invention. All blending amounts are in mass %.

[0144] [Formulation example 1]

[0145] [Table 2]

[0146] Table 2: Formulation Example 1

[0147] PEG-240 / HDI Copolymer Bis-Decyldodeceth-20 1.2 Carbomer 0.2 PEG-12 Dimethicone 1 Dimethicone (Volatile) 7.5 Dimethicone 1.5 Dipropylene Glycol 7 Butylene Glycol 8 Glycerin 10 Erythritol 1 Trehalose 0.5 Xylitol 0.5 PEG / PPG-14 / 7 Dimethyl Ether 0.1 Tranexamic Acid 2 Dipotassium Glycyrrhizate 0.01 Xanthan Gum 0.01 Sodium Methyl Stearoyl Taurate 0.01 Niacinamide 1 Phenoxyethanol Appropriate Amount Water Balance Total 100

[0148] [Formulation Example 2]

[0149] [Table 3]

[0150] Table 3: Formulation Example 2

[0151] PEG-240 / HDI Copolymer Bis-Decyldodeceth-20 0.9 Carbomer 0.2 PEG-12 Dimethicone 1 Dimethicone 5 Diphenylsilanoxy Phenyl Trimethylsiloxane 0.3 Phytosterols / Octyldodecyl Lauroyl Glutamate 0.1 Dipropylene Glycol 7 Butylene Glycol 8 Glycerin 8 Diglycerin 2 Erythritol 0.5 Trehalose 0.5 Tranexamic Acid 2 Dipotassium Glycyrrhizate 0.1 L-Theanine 0.1 Fagus Sylvatica Bud Extract 0.05 Xanthan Gum 0.01 Sodium Methyl Stearoyl Taurate 0.01 Phenoxyethanol Appropriate Amount Appropriate Amount Sodium Metaphosphate Appropriate Amount Appropriate Amount Sodium Pyrosulfite Appropriate Amount Appropriate Amount Water Balance Total 100

Claims

1. An oil-in-water type cosmetic, which contains: (A) A hydrophobically modified polyether polyurethane, (B) A carboxyvinyl polymer, (C) A polyoxyalkylene-modified silicone, (D) An oil, (E) An aqueous component selected from a monohydric alcohol and a dihydric alcohol, and (F) Water, (i) When the component (E) is a single monohydric alcohol, its content is 1 to 15% by mass based on the total mass of the cosmetic, (ii) When the component (E) is a single dihydric alcohol, its content is 1 to 20% by mass based on the total mass of the cosmetic, (iii) When the component (E) is a combination of a monohydric alcohol and a dihydric alcohol, their total content is 1 to 45% by mass based on the total mass of the cosmetic.

2. The cosmetic according to claim 1, wherein, (A) The component is the component represented by the following formula (a): In formula (a), R a1 , R a2 and R a4 are each independently a hydrocarbon group having 2 to 4 carbon atoms. R a3 is an optionally substituted hydrocarbon group having 1 to 10 carbon atoms and a urethane bond, R a5 is a hydrocarbon group having 8 to 36 carbon atoms, a1 is an integer of 1 to 500, a2 is an integer of 1 to 200, a3 is an integer of 1 or more, a4 is an integer of 2 or more.

3. The cosmetic according to claim 1 or 2, wherein (A) The component is PEG-240 / HDI copolymer bis-decyltetradecyl polyether-20 ether.

4. The cosmetic according to claim 1 or 2, wherein (C) The component is PEG-12 polydimethylsiloxane.

5. The cosmetic according to claim 1 or 2, wherein, Based on the total mass of the cosmetic, the content of the component (A) is 0.5 to 3% by mass.

6. The cosmetic according to claim 1 or 2, wherein, Based on the total mass of the cosmetic, the content of the component (B) is 0.02 to 1% by mass.

7. The cosmetic according to claim 1 or 2, wherein Based on the total mass of the cosmetic, the content of the component (C) is 0.05 to 5% by mass.

8. The cosmetic according to claim 1 or 2, wherein, Based on the total mass of the cosmetic, the content of the component (D) is 3 to 30% by mass.

9. The cosmetic according to claim 1 or 2, wherein Based on the total mass of the cosmetic, the total content of the component (A) and the component (C) is 0.6 to 3% by mass.

10. The cosmetic according to claim 1 or 2, having a viscosity of 10,000 mPa·s or more at 30°C.

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