Multi-layered cosmetics

Abstract

To provide multilayered cosmetics that are readily put into a uniform dispersion state by shaking, easily agree with and slide on skin during application, and have excellent warm-feeling effect.SOLUTION: A multilayered cosmetic comprises following components (A)-(D): (A) polyoxyalkylene methyl glucoside, (B) polyethylene glycol that is liquid at 25°C, (C) at least one selected from glycerol and diglycerol, and (D) an oil component that is liquid at 25°C. The total content of polyols comprising (A), (B) and (C) is 60-80 mass%. The mass ratio of the component (A) to the component (B), (A) / (B), is 0.6-23.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a multi-layered cosmetic composition. [Background technology]

[0002] BACKGROUND ART Cosmetics that are applied to the skin and massaged to provide a moderate warming sensation and promote blood circulation are known. For example, Patent Document 1 describes that an oil-in-polyhydric alcohol-based topical composition containing polyether-modified silicone, polyhydric alcohol, oil, and water has excellent usability and warming effect. Patent Document 2 describes that a warming gel cosmetic containing polyethylene glycol with an average degree of polymerization of 4 to 30 and glycerin has a sustained warming effect and is highly safe. On the other hand, multi-layered cosmetics are known that appear to separate into multiple layers when left to stand and are shaken to form a uniformly dispersed state before application to the skin. For example, Patent Document 3 describes that a multi-layered cosmetic containing a specific nonionic surfactant, a polyhydric alcohol, and a specific oil has excellent aesthetics and a good feel when used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-261433 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-116726 [Patent Document 3] Japanese Patent Application Publication No. 2019-119703 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional cosmetics with a warming effect do not provide a sufficient warming sensation or its durability, and are also unsatisfactory in terms of feel when used, such as compatibility with the skin and smoothness upon application.

[0005] The present invention relates to a multi-layered cosmetic that becomes uniformly dispersed when shaken, and exhibits clear separation between the interfaces of the layers when left to stand, and that has an excellent aesthetic appearance and feel when used. [Means for solving the problem]

[0006] The present inventors have discovered that by combining a specific polyol with a liquid oil in a specific ratio, a uniformly dispersed state can be easily achieved upon shaking, and a multi-layered cosmetic can be obtained that has good skin compatibility and smoothness upon application and an excellent warming effect, and have thus completed the present invention.

[0007] The present invention relates to the following components (A) to (D): (A) polyoxyalkylene methyl glucoside, (B) polyethylene glycol, which is liquid at 25°C; (C) one or more selected from glycerin and diglycerin, (D) Oil components that are liquid at 25°C Contains the total content of polyols including components (A), (B), and (C) is 60 to 80% by mass, The multi-layered cosmetic composition has a mass ratio (A) / (B) of component (A) to component (B) of 0.6 to 23. [Effects of the Invention]

[0008] The multi-layered cosmetic of the present invention easily becomes uniformly dispersed when shaken, has a good feel when applied, such as good skin compatibility and smoothness, and also has an excellent warming effect. DETAILED DESCRIPTION OF THE INVENTION

[0009] The polyoxyalkylene methyl glucoside of component (A) used in the present invention is represented by the following formula (1).

[0010] [ka]

[0011] (In the formula, A represents a linear or branched alkylene group having 2 to 4 carbon atoms, and a, b, c, and d represent the average number of moles added and are numbers of 2 to 20.)

[0012] As the polyoxyalkylene methyl glucoside, polyoxyethylene methyl glucoside and polyoxypropylene methyl glucoside are preferred, and for example, commercially available products such as Macbiobride MG-10E (manufactured by NOF Corporation), Macbiobride MG-20E (manufactured by NOF Corporation), Macbiobride MG-10P (manufactured by NOF Corporation), and Macbiobride MG-20P (manufactured by NOF Corporation) can be used. The number of polyoxyalkylene chains contained in these polyoxyalkylene methyl glucosides is represented by a+b+c+d in the structure represented by the above formula (1); for example, Macbiobride MG-20E has 20 polyoxyethylene chains, and Macbiobride MG-10E has 10.

[0013] Component (A) can be used alone or in combination of two or more types, and the content is preferably 1 to 40 mass% of the total composition, more preferably 3 to 36 mass%, and even more preferably 6 to 30 mass%, from the viewpoints of excellent warming effect, good skin compatibility and smoothness, and high adhesion without stickiness.

[0014] Component (B) is polyethylene glycol that is liquid at 25° C. Here, liquid means that it has fluidity, and includes a paste state. The polyethylene glycol preferably has a number average molecular weight of 300 to 1,000, more preferably 400 to 600, from the viewpoint of excellent warming effect.

[0015] Component (B) can be used alone or in combination of two or more types, and the content is preferably 0.5 to 20 mass % of the total composition, more preferably 0.8 to 10 mass %, and even more preferably 1 to 6 mass %, from the viewpoints of good smoothness during application and excellent warming effect.

[0016] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is 0.6 to 23, preferably 1 to 20, and more preferably 1.5 to 15, from the viewpoint of excellent smoothness and warming effect during application.

[0017] Component (C) is at least one selected from glycerin and diglycerin. From the viewpoints of warmth, smoothness and compatibility with the skin, it is preferable to use glycerin and diglycerin in combination. When glycerin and diglycerin are used in combination, the mass ratio thereof (glycerin / diglycerin) is preferably 0.1 to 4.5, more preferably 0.5 to 4, and even more preferably 1 to 3.5, from the viewpoints of smoothness, compatibility with the skin, and dispersibility. From the viewpoint of sustaining the warming effect, the total content of component (C) is preferably 20 to 60 mass % of the entire composition, more preferably 25 to 55 mass %, and even more preferably 30 to 50 mass %.

[0018] The multi-layered cosmetic of the present invention may further contain a polyol other than components (A), (B), and (C). Such a polyol is a compound having two or more hydroxyl groups in the molecule, and may be any polyol that is commonly used in cosmetics. Examples of dihydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, and 1,3-propanediol. Examples of trihydric alcohols include trimethylolpropane. Examples of tetrahydric alcohols include erythritol. Examples of polyhydric alcohols having a valence of five or more include polyglycerols such as triglycerin; sugars and sugar alcohols such as glucose, maltose, maltose, sucrose, xylitol, sorbitol, and maltitol. Of these, propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,3-propanediol, sorbitol, and maltitol are preferred from the viewpoint of smoothness and dispersibility.

[0019] The polyols other than components (A), (B), and (C) can be used alone or in combination of two or more. From the viewpoint of dispersibility, the content is preferably 5 to 30 mass% of the total composition, more preferably 10 to 25 mass%, and even more preferably 12 to 23 mass%.

[0020] In the present invention, the total content of the polyols including components (A), (B) and (C) is 60 to 80% by mass, preferably 63 to 77% by mass, and more preferably 65 to 75% by mass, of the total composition, from the viewpoints of providing a good feeling in use and excellent dispersibility and warming effect.

[0021] Component (D) is an oil component that is liquid at 25° C. Liquid means that it has fluidity, and includes paste-like states. Such oil components may be any oils that are commonly used in cosmetics, such as hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols.

[0022] More specifically, examples of hydrocarbon oils include straight-chain or branched-chain hydrocarbon oils such as squalane, liquid paraffin, liquid isoparaffin, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum.

[0023] Ester oils include monoester oils, diester oils, triester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, 2-hexyldecyl palmitate, butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, and alkyl benzoates (C12 to C15).

[0024] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms and difatty acid esters of polyhydric alcohols. Specific examples include propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, propylene glycol diisostearate, glyceryl diisostearate, glyceryl monomyristate monoisostearate, glycerin di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, and di-2-ethylhexyl sebacate.

[0025] Triester oils include tri-fatty acid esters of trivalent or higher polyhydric alcohols, and specific examples include glyceryl trimyristate, glyceryl triisopalmitate, glyceryl tri-2-heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(caprylic / capric)glyceryl, glyceryl trioleate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, olive oil, and jojoba oil.

[0026] Examples of tetraester oils include tetra-fatty acid esters of tetrahydric or higher polyhydric alcohols, and specific examples include pentaerythritol tetra(behenate / benzoate / ethylhexanoate), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate.

[0027] The ether oils include dialkyl ethers, and specific examples thereof include dihexyl ether, dicaprylyl ether, and cetyl-1,3-dimethylbutyl ether.

[0028] Examples of silicone oils include crosslinked methylpolysiloxane, network methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxanes such as methyltrimethicone, dimethylcyclopolysiloxane and diphenylsiloxyphenyltrimethicone, and higher alcohol-modified organopolysiloxanes. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0029] Examples of higher alcohols include those having a linear or branched alkyl or alkenyl group having 10 to 24 carbon atoms, such as lauryl alcohol, myristyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyldodecanol, and oleyl alcohol.

[0030] From the viewpoints of good compatibility with the skin and dispersibility, component (D) preferably contains at least one or more oils selected from hydrocarbon oils, ester oils, and silicone oils. From the viewpoint of smoothness during massage, hydrocarbon oils such as squalane, dimethylpolysiloxane or methylphenylpolysiloxane having a viscosity of 50 cs or less, and plant-derived ester oils such as olive oil, jojoba oil, avocado oil, and macadamia nut oil are more preferred.

[0031] Component (D) can be used alone or in combination of two or more types, and from the viewpoint of good compatibility with the skin and excellent feel, the content is preferably 20 to 40 mass% of the total composition, more preferably 22 to 38 mass%, and even more preferably 25 to 35 mass%.

[0032] In the present invention, the mass ratio (total polyols / (D)) of the total content (total polyols) of polyols including components (A), (B), and (C) to component (D) is preferably 1.5 to 4, more preferably 1.7 to 3, and even more preferably 2 to 2.5, from the viewpoints of providing a good feel in use and excellent dispersibility and warming effect.

[0033] In the multi-layered cosmetic of the present invention, the water content is preferably less than 2% by mass, more preferably 1.7% by mass or less, and even more preferably 1.5% by mass or less, from the viewpoint of maintaining the warming effect. In addition, the multi-layered cosmetic may not contain water (0% by mass).

[0034] In addition to the above, the multi-layered cosmetic of the present invention may contain components commonly used in cosmetics, such as surfactants, moisturizing agents other than polyols, ultraviolet absorbers, ultraviolet scattering agents, thickeners, sequestering agents, neutralizing agents, pH adjusters, antioxidants, antibacterial agents, preservatives, antiperspirants, medicines, powders, coloring agents, fragrances, animal and plant extracts, etc. These components are not limited to their individual uses, but can also be diverted for other purposes depending on the purpose, for example, an antiperspirant can be used as a fragrance, or they can be used in combination with other purposes, for example, to achieve the effects of both an antiperspirant and a fragrance.

[0035] The multi-layered cosmetic of the present invention can be produced by appropriately mixing the predetermined components, and can be produced by uniformly mixing and dispersing all the components, regardless of the mixing order. For example, the multi-layered cosmetic of the present invention can be produced by a production method including a step of mixing and stirring components (A) to (D) and optional components. When a solid oil is contained, the mixing and stirring step may include a step of mixing and stirring under heating at a temperature equal to or higher than the melting point of the solid oil.

[0036] The multi-layered cosmetic of the present invention is a cosmetic that maintains a multi-layered state of two or more layers, with a polyhydric alcohol layer containing at least components (A), (B), and (C) and an oil layer containing component (D), which are mutually incompatible when left standing, and can be made into a uniformly dispersed state by shaking before use, gradually returning to its original multi-layered state. Examples include a two-layered cosmetic consisting of an oil layer-polyhydric alcohol layer, and a three-layered cosmetic consisting of a powder layer-oil layer-polyhydric alcohol layer.

[0037] The multi-layered cosmetic of the present invention has at least an oil layer and a polyhydric alcohol layer, and in this case, when left standing, the oil layer is present on the opening side (upper side) of the container and the polyhydric alcohol layer is present on the bottom side (lower side) of the container.

[0038] The multi-layered cosmetic composition of the present invention has an excellent aesthetic appearance, and can impart functions such as moisturizing properties, occlusive properties, and skin softening properties to the cosmetic composition due to the polyhydric alcohol and liquid oil. Therefore, it can be used by applying it to the skin, preferably the skin excluding the scalp, and more preferably the face, body, hands, feet, etc., for purposes such as heat retention, anti-aging, whitening, packs, massage, sunscreen, makeup base, foundation, lip balm, cleansing agent, etc., and is therefore suitable as a skin cosmetic composition. In particular, it is suitable for use as a massage cosmetic, pack cosmetic, or beauty serum, as it spreads easily, has smoothness, and provides a warming effect when applied. [Example]

[0039] Examples 1 to 11, Comparative Examples 1 to 6 Two-layer cosmetics were prepared with the compositions shown in Tables 1 and 2, and evaluated for warmth, compatibility with the skin, smoothness, and dispersibility. The results are also shown in Tables 1 and 2.

[0040] (Manufacturing method) While stirring component (C) with a propeller, components (A), (B), other polyhydric alcohols, and purified water were added and dispersed to produce a polyhydric alcohol layer. Sorbitan monostearate was added to the olive oil while stirring with a propeller, and after confirming that it had dissolved, the remaining component (D) was added and dispersed to produce an oil layer. The oil layer was added to the resulting polyhydric alcohol layer to obtain a two-layer cosmetic.

[0041] (Evaluation method) (1) Warmth: After uniformly mixing each two-layer cosmetic product, 0.5g was applied to the entire face and then spread and blended with the entire hand on the area to be treated. The "warmth sensation" upon application was evaluated using the visual analog scale method. A 10cm line was drawn on a blank sheet of paper, and the left end was assigned a no-warmth sensation, while the right end was assigned a very warm sensation. The evaluation was indicated by an arbitrary point. The length from the left end was measured, and the left end was quantified as a number, with 0 being the left end and 10 being the right end. The average value (rounded to one decimal place) of seven expert panelists was calculated.

[0042] (2) Skin compatibility: After uniformly mixing each two-layer cosmetic, 0.5g was applied to the entire face and then spread and blended with the entire hand on the area to be treated. The "skin compatibility" upon application was evaluated using the visual analog scale method. A 10cm line was drawn on a blank sheet of paper, and an arbitrary point was used to indicate the evaluation, with the left end representing no skin compatibility at all and the right end representing very good skin compatibility. The length from the left end was measured and quantified as a number, with the left end being 0 and the right end being 10. The average value (rounded to one decimal place) of seven expert panelists was calculated.

[0043] (3) Slipperiness: After uniformly mixing each two-layer cosmetic, 0.5g was applied to the entire face and then spread and blended with the entire hand on the area to be treated. The "smoothness" during application was evaluated using the visual analog scale method. A 10cm line was drawn on a blank sheet of paper, and the left end was marked with no feeling of smoothness, while the right end was marked with an arbitrary point, indicating a feeling of very smoothness. The length from the left end was measured, and the left end was quantified as a number, with 0 being the left end and 10 being the right end. The average value (rounded to one decimal place) of seven expert panelists was calculated.

[0044] (4) Dispersibility: Immediately after production, the multi-layered cosmetic was shaken up and down (shaking width of 15 cm, shaking speed of 10 times / 5 seconds) in a thermostatic bath at 25°C, and the degree of dispersion immediately after shaking was visually evaluated according to the following criteria. ◯: A uniform dispersion was confirmed within 10 shakings. △: A uniform dispersion state was confirmed after shaking more than 10 times and less than 20 times. ×: A uniform dispersion was not achieved within 20 shakings.

[0045] [Table 1]

[0046] [Table 2]

[0047] The components marked with *1 to *10 in the table are as follows: *1: MacbioBride MG-20E (NOF Corporation) *2: MacbioBride MG-20P (NOF Corporation) *3:PEG#600 (NOF Corporation) *4:PEG#400 (NOF Corporation) *5: RG·Co·K (manufactured by NOF Corporation) *6: Diglycerin 801 (manufactured by Sakamoto Pharmaceutical Co., Ltd.) *7: FZ-209 (Dow Corning Toray Co., Ltd.) *8: NIKKOL Sugar Squalane (manufactured by Nikko Chemicals) *9: Kuropure OL-LQ-(JP) (manufactured by Croda Japan) *10: Span 120-LQ-(RB) (manufactured by Croda Japan)

[0048] Prescription examples 1-3 Two-layer cosmetics having the compositions shown in Tables 3 to 5 were produced in the same manner as in Examples 1 to 11, except that the oil-soluble extract was added to the oil layer and the water-soluble extract was added to the polyhydric alcohol layer. All of the two-layered cosmetic compositions obtained were excellent in warmth, compatibility with the skin, smoothness and dispersibility.

[0049] [Table 3]

[0050] [Table 4]

[0051] [Table 5]

[0052] The ingredients marked *11 to *30 in the table are as follows: *11: Ju extract ALN (Maruzen Pharmaceuticals) *12: Royal jelly extract (manufactured by API Co., Ltd.) *13: Hyaluronic acid FCH (FCH-SU) (Kikkoman Biochemifa Corporation) *14: Huangshan medicine extract (manufactured by Sansei Pharmaceutical Co., Ltd.) *15:PEG#1000 (NOF Corporation) *16: Eldew PS-203 (Ajinomoto Co., Inc.) *17: Refined macadamia oil (manufactured by NOF Corporation) *18: PLANDOOL-MAS (manufactured by Nippon Fine Chemicals) *19: Tornare (Hayashibara Publishing) *20: Ubinal A PLUS GRANULAR (BASF Japan) *21: Carrot oil (manufactured by Chemisches Laboratorium Dr. Kurt Richter) *22: Althea extract (manufactured by Koei Kogyo Co., Ltd.) *23: Carrageenan CS-67(N) (manufactured by San-ei Gen F.F.I. Co., Ltd.) *24: MacbioBride MG-10P (NOF Corporation) *25: Tornare (Hayashibara Publishing) *26: Refined jojoba oil (manufactured by Koei Kogyo Co., Ltd.) *27: Kuropure Avocado-LQ-(JP) (manufactured by Croda Japan) *28: Falcorex Hibamata (manufactured by Ichimaru Falcos) *29: Falcorex Choji (manufactured by Ichimaru Falcos) *30: Elderberry Extract BG (Maruzen Pharmaceuticals)

Claims

1. The following components (A) to (D): (A) polyoxyalkylene methyl glucoside, (B) polyethylene glycol that is liquid at 25°C; (C) one or more selected from glycerin and diglycerin, (D) Oil component that is liquid at 25°C Contains the total content of polyols including components (A), (B), and (C) is 60 to 80% by mass; A two-layer cosmetic composition in which the mass ratio (A) / (B) of component (A) to component (B) is 0.6 to 23.

2. 2. The two-layer cosmetic according to claim 1, wherein the mass ratio (total polyols / (D)) of the total content of polyols including components (A), (B), and (C) (total polyols) to component (D) is 1.5 to 4.

3. 3. The two-layer cosmetic according to claim 1, wherein component (C) is glycerin and diglycerin, and the mass ratio thereof (glycerin / diglycerin) is 0.1 to 4.

5.

4. 4. The two-layer cosmetic according to claim 1, wherein component (C) is glycerin and diglycerin, and the total content thereof is 20 to 60% by mass.

5. 5. The two-layer cosmetic according to claim 1, wherein the content of component (A) is 1 to 40% by mass.

6. A two-layer cosmetic according to claim 1, wherein the total content of polyols including components (A), (B) and (C) is 60 to 77 mass %.

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