Two-layer separated cosmetics

Abstract

To provide a two-layer separation cosmetic that is mixed at the time of use to give a warm or cold feeling.SOLUTION: A two-layer separation cosmetic contains (A) an oil phase containing 5-50 mass% of a component that produces heat of solution and a thickener and (B) an aqueous phase. The oil phase has a viscosity of 5,000-150,000 mPa s. When left standing, the oil phase and the aqueous phase are separated.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a two-layer separated cosmetic composition, and more particularly to a two-layer separated cosmetic composition that can produce a cooling or warming effect by mixing the two layers together at the time of use. [Background technology]

[0002] Conventionally, cosmetics containing ingredients such as erythritol and magnesium sulfate, which generate heat of dissolution, are known. These ingredients generate heat of dissolution only when dissolved in water. For this reason, it is difficult to incorporate them into cosmetics, and they must be dispersed in oil or other substances before use, and then brought into contact with water after use.

[0003] Non-aqueous warming skin cleansing compositions are known that impart a warming effect when mixed with water, thereby improving the cleansing effect, with the aim of removing sebum dirt clogging pores (see, for example, Patent Document 1). The non-aqueous warming skin cleansing composition described in Patent Document 1 achieves a warming effect when used together with water.

[0004] Cosmetics are also known in which a first agent, the main ingredient of which is a heat-generating substance coated with a silicone-based coating agent, and a second agent, the main ingredient of which is water, are prepared separately, and these first and second agents are mixed immediately before use using a pre-mixing method before application (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-215256 [Patent Document 2] Japanese Patent Application Publication No. 11-228333 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the cosmetic preparation of Patent Document 1 has the problem of needing to be used with water, limiting the conditions under which it can be used, and the cosmetic preparation of Patent Document 2 involves the complicated process of separately preparing and maintaining multiple ingredients in a separated state.

[0007] There is a need for cosmetics that can impart a warming or cooling sensation without adding water from the outside at the time of use or without the need for the complicated process of mixing ingredients immediately before use. [Means for solving the problem]

[0008] As a result of extensive research, the present inventors came up with the idea of ​​a two-layer separated cosmetic preparation in which a component that generates heat of dissolution and water can coexist without the component that generates heat of dissolution coming into contact with water until the time of use, and thus completed the present invention.

[0009] That is, according to one embodiment, the present invention relates to a two-layer separated cosmetic material, (A) an oil phase containing 5 to 50 mass% of a component that generates heat of solution and a thickener; (B) Aqueous phase and wherein the viscosity of the oil phase is 5,000 to 150,000 mPa s; The present invention relates to a two-layer separation cosmetic in which the oil phase and the aqueous phase exist separately upon standing.

[0010] In the two-layer separation cosmetic, the component that generates heat of dissolution is preferably one or more selected from xylitol, erythritol, sorbitol, maltitol, lactitol, mannitol, palatinose, glycine, magnesium sulfate, calcium sulfate, zinc sulfate, aluminum sulfate, ferrous sulfate, magnesium chloride, calcium chloride, aluminum chloride, ferric chloride, zinc chloride, calcium carbonate, and sodium carbonate.

[0011] In the two-layer separated cosmetic, the oil phase preferably contains an oil agent, and the oil phase preferably comprises 15 to 65% by mass.

[0012] In the two-layer separated cosmetic, the aqueous phase preferably contains water.

[0013] The two-layer separated cosmetic preferably does not contain a surfactant. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a two-layer separated cosmetic in which an oil phase and an aqueous phase exist separately in a single container when left to stand, and which can impart a warming or cooling sensation when used. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the embodiments described below.

[0016] According to one embodiment, the present invention is a two-layer separated cosmetic material. The two-layer separated cosmetic material comprises: (A) an oil phase containing a component that generates heat of solution and a thickener; (B) Aqueous phase and The oil phase and the aqueous phase exist separately upon standing.

[0017] Here, a two-layer separated cosmetic refers to a state in which the aqueous phase and the oily phase coexist without being emulsified when visually confirmed. Furthermore, "when left standing" refers to the state after the cosmetic has been left standing for at least one hour after being subjected to external force such as mixing or shaking. The cosmetic according to this embodiment is characterized in that the oily phase and the aqueous phase exist separately when left standing, and the oily phase components and the aqueous phase components are not emulsified.

[0018] (A) Oil phase components The oil phase contains at least a component that generates heat of dissolution and a thickener. The component that generates heat of dissolution and the thickener are preferably dispersed in an oil agent. The oil phase may further contain any oil-based component suited to the intended use of the cosmetic. Examples include, in addition to the oil agent, powder components, dispersants, UV absorbers, fragrances, antioxidants, preservatives, etc. On the other hand, it is preferable that the oil phase does not contain a surfactant. This is because the surfactant may emulsify the water phase and the oil phase.

[0019] Among the components that generate heat of dissolution, those that generate a positive heat of dissolution are also called warming components and can be selected from anhydrous inorganic metal salts. Specific examples include magnesium sulfate, calcium sulfate, zinc sulfate, aluminum sulfate, ferrous sulfate, magnesium chloride, calcium chloride, aluminum chloride, ferric chloride, zinc chloride, calcium carbonate, and sodium carbonate. These may be used alone or in appropriate combinations of two or more. When two or more types are combined, the ratio may be arbitrary.

[0020] Among the components that generate heat of dissolution, those that generate negative heat of dissolution are also called cooling components, and may be sugar alcohols such as xylitol, erythritol, sorbitol, maltitol, lactitol, mannitol, and palatinose, or glycine. These may be used alone or in appropriate combinations of two or more. When two or more types are combined, the ratio may be arbitrary.

[0021] The thickener may be any thickener that can be dissolved or dispersed in the oil phase and thicken the oil phase to a predetermined viscosity, as described below. Examples of thickeners include dimethyl silylated silica, dextrin palmitate, and disteardimonium hectorite. These may be used alone or in combination of two or more. Combining two or more thickeners may be advantageous in terms of usability and stability. When combining two or more thickeners, the ratio may be arbitrary as long as the desired viscosity can be achieved.

[0022] The oil may be derived from animal oil, vegetable oil, synthetic oil, or the like, or may be an oil that can be commonly used in cosmetics, such as solid oil, semi-solid oil, liquid oil, or volatile oil. In one embodiment, a liquid oil that is liquid at room temperature to the manufacturing temperature of the cosmetic (25 to 80°C) and is commonly used in cosmetics and quasi-drugs can be used. Examples of liquid oils include hydrocarbons such as liquid paraffin, squalane, and hydrogenated polydecene, isopropyl myristate, octyldodecyl myristate, di-2-ethylhexyl sebacate, neopentyl glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, glyceryl tri-2-ethylhexanoate, diglyceryl triisostearate, pentaerythritol tetra-2-ethylhexanoate, dipentaerythritol 2-ethylhexanoate, and tri-2-ethylhexanoate. Examples of suitable oils include esters such as dimethylolpropane and diisostearyl malate; oils and fats such as olive oil, castor oil, jojoba oil, and macadamia nut oil; higher fatty acids such as isostearic acid and oleic acid; higher alcohols such as isostearyl alcohol and oleyl alcohol; and silicone oils such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (diphenylsiloxyphenyltrimethicone), and decamethylcyclopentasiloxane (cyclomethicone). The liquid oil component of the present invention can be any one or more of the above. Furthermore, the oil agent may contain solid oils or semi-solids, or may be a mixture of oils with different properties or a mixture of different oils with the same properties.

[0023] Examples of powders that can be used as optional components are not particularly limited by shape (e.g., plate-like, spindle-like, needle-like, fibrous, or spherical), particle structure (e.g., porous or non-porous), particle size, etc., as long as they are usable in ordinary cosmetics, and examples thereof include inorganic powders, organic powders, pigment powders, and composite powders. Examples of such powders include mica such as talc, kaolin, muscovite, phlogopite, lepidolite, biotite, lithia mica, synthetic mica, and sericite; silicic anhydride, magnesium silicate, aluminum silicate, barium silicate, calcium silicate, bentonite, sericite, bismuth oxychloride, titanium oxide (including fine particle titanium oxide), zinc oxide (including fine particle zinc oxide), magnesium oxide, aluminum oxide, barium sulfate, boron nitride, light calcium carbonate, heavy calcium carbonate, yellow iron oxide, red iron oxide, black iron oxide, ultramarine, ferrous iron, cobalt oxide, chromium oxide, chromium hydroxide, carbon black, and calamine; inorganic powders such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, vinyl acetate, and vinyl propionate. Examples of suitable powders include acrylic polymers having constituent monomers such as vinyl, vinyl laurate, vinyl stearate, styrene, vinyltoluene, (meth)acrylamide, (meth)acrylic acid, itaconic acid, and maleic acid; silicone resins such as methylsiloxane network polymers and crosslinked silicone-network silicone block copolymers; organic powders such as polyethylene, cellulose, magnesium stearate, zinc stearate, N-acylysine, and nylon; pigment powders such as carotenoid pigments, flavonoid pigments, flavin pigments, quinone pigments, porphyrin pigments, curcumin, organic tar pigments, and organic pigment lake pigments; and composite powders such as barium sulfate-coated mica titanium dioxide, titanium oxide-containing silicon dioxide, and zinc oxide-containing silicon dioxide. The two-layer separated cosmetic of the present invention can use one or more of these powders selected as desired.

[0024] The powder may also be surface-treated. Such surface treatments are not limited to those used on ordinary cosmetic powders, but examples include dimethicone treatment, methicone / hydrogen dimethicone treatment, dimethicone / hydrogen dimethicone treatment, triethoxycaprylylsilane treatment, dimethiconol-aminopropyltriethoxysilane treatment, N-stearoyl-L-glutamate disodium-Al hydroxide treatment, palmitoyl proline, palmitoyl sarcosine sodium-palmitoyl glutamate magnesium-palmitoyl glutamate palmitic acid treatment, isostearyl sebacate-stearoyl glutamate disodium-Al hydroxide treatment, dimyristate aluminum treatment, hydrogenated lecithin-trimyristic acid-Al hydroxide treatment, and alginate sodium treatment. It is particularly preferable to subject the powder to a hydrophobic treatment.

[0025] The content of the component that generates heat of dissolution is 5 to 50% by mass, assuming the total mass of the cosmetic to be 100%. If it is less than 5% by mass, the cooling or warming effect is difficult to feel, and if it is more than 50% by mass, the cooling or warming effect is too strong and unsuitable for use. For example, it is preferably 10 to 45% by mass, and more preferably 15 to 40% by mass.

[0026] The viscosity of the oil phase is 5,000 to 150,000 mPa·s. Viscosity here refers to the viscosity measured using a Brookfield viscometer at 25°C, using a No. 4 rotor at 12 rpm for 30 seconds (for viscosities of 50,000 mPa·s or less), a No. 4 rotor at 6 rpm for 60 seconds (for viscosities of 100,000 mPa·s or less), or a No. 4 rotor at 3 rpm for 120 seconds (for viscosities of 200,000 mPa·s or less). If the viscosity is lower than 5,000 mPa·s, the oil and water phases may not separate upon standing and may tend to mix before use, potentially resulting in a loss of cooling and warming effects over time. If the viscosity is higher than 150,000 mPa·s, the oil and water phases may not mix well, resulting in a lack of adequate cooling or warming effects and poor usability. It is more preferable that the viscosity of the oil phase is, for example, 20,000 to 100,000 mPa·s.

[0027] The content of the thickener that can achieve such a viscosity can be 0.1 to 10% by mass, preferably 0.5 to 7% by mass, and more preferably 2 to 5% by mass, when the mass of the entire cosmetic is taken as 100%. However, the content of the thickener is not particularly limited, and it is preferable to adjust the content appropriately depending on the type of thickener so as to achieve the above-mentioned appropriate viscosity.

[0028] Optional components such as dispersants, powders, and UV absorbers can be appropriately blended as needed within a range that does not impair the effects of the present invention. For example, the powder can be contained in an amount of about 1 to 20% by mass when the mass of the entire cosmetic is taken as 100%, but the amount is not limited to a specific amount.

[0029] The oil may be a component that generates heat of dissolution, a thickener, or the remainder of other oil-soluble components. In relation to the content of other components, such as the thickener, it is preferable that the amount of oil be such that a certain degree of viscosity can be obtained.

[0030] The oil phase containing these ingredients can account for 15 to 65% by mass when the mass of the entire cosmetic is taken as 100%.

[0031] (B) Water phase components The aqueous phase contains water as an essential component. The water content can be 5 to 50% by mass when the total mass of the cosmetic is taken as 100%. The water content can be appropriately determined within the range of 5 to 50% by mass in relation to the content of the component that generates heat of dissolution.

[0032] The aqueous phase may optionally contain any aqueous component suited to the intended use of the cosmetic. Specific examples of the optional aqueous component include water-soluble polymers, alcohols, water-soluble moisturizers, preservatives, and chelating agents. On the other hand, it is preferable that the aqueous phase also does not contain any surfactants, as this is because the surfactants may emulsify the aqueous phase and the oil phase.

[0033] The water may be, for example, water of the grade commonly used in cosmetics and quasi-drugs. The aqueous polymer can be used for the purpose of thickening the aqueous phase. Examples of the aqueous polymer include, but are not limited to, carboxyvinyl polymers such as Carbopol, hydroxypropylmethylcellulose derivatives such as Sangelose, guar gum, sodium chondroitin sulfate, gum arabic, sodium alginate, carrageenan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, and sclerotium gum.

[0034] The aqueous phase containing these components may be the remainder of the content of the oil phase when the total mass of the cosmetic is taken as 100%.

[0035] In addition to the ingredients exemplified above, the cosmetic according to this embodiment can contain other ingredients, typically used in cosmetics, quasi-drugs, pharmaceutical compositions, etc., in the oil phase or aqueous phase, as long as the ingredients do not impair the effects of the present invention. Examples of such ingredients include moisturizers, water-soluble polymers, film-forming agents, water-insoluble polymers, dyes, pigments, pearlescent agents, lower alcohols, sugars, ultraviolet absorbers, amino acids, vitamins, whitening agents, skin activators, blood circulation promoters, anti-inflammatory agents, and other pharmaceutical agents, plant extracts, organic acids, organic amines, sequestering agents, pH adjusters, antioxidants, antibacterial agents, preservatives, astringents, cooling agents, and fragrances.

[0036] The cosmetic preparation according to this embodiment is a cosmetic preparation in which, upon standing, the oil phase and the aqueous phase are separated into two phases, and the oil phase and the aqueous phase are not emulsified. In other words, it is a two-layer separated cosmetic preparation in which the oil phase and the aqueous phase are separated into two layers. Examples of such cosmetic preparations include, but are not limited to, lotions, gels, beauty serums, foundations, and makeup bases.

[0037] Next, a method for producing the cosmetic according to this embodiment will be described. The cosmetic according to this embodiment can be produced by the following steps. (1) A step of preparing an oil phase by dispersing or dissolving oil phase components in an oil agent by heating. (2) A step of mixing water and aqueous phase components to prepare an aqueous phase (3) A step of mixing the prepared oil phase and aqueous phase

[0038] In step (1), oil phase components are dispersed or heated and dissolved in an oil agent. The order in which the oil phase components are added to the oil agent is not particularly limited. Each component can be mixed at an appropriate time under temperature and pressure conditions suitable for the preparation of the component. The equipment used for mixing / dispersing or heating and dissolving may be an equipment for mixing / stirring or heating and dissolving that is commonly used in the cosmetic field for mixing components. However, it is preferable not to mix the water phase components into the oil phase in the step of preparing the oil phase.

[0039] In step (2), water and the aqueous phase components are mixed. The order of mixing the water and the aqueous phase components is not particularly limited. The components can be mixed at an appropriate time under temperature and pressure conditions suitable for the preparation of each component, and can be carried out using a general device. However, it is preferable not to mix the oil phase components with the aqueous phase in the step of preparing the aqueous phase.

[0040] In step (3), the oil phase and the aqueous phase prepared separately in steps (1) and (2) are combined to form a two-layer separated cosmetic. When combining the oil phase and the aqueous phase, it is preferable not to use a strong mixing force, as this may result in emulsification. The oil phase and the aqueous phase are preferably mixed when the two-layer separated cosmetic is filled into a container. In other words, it is preferable to fill the oil phase prepared in step (1) and the aqueous phase prepared in step (2) into a container separately, so that they are mixed only after filling.

[0041] The cosmetic preparation according to this embodiment can be produced as described above and stored in a single container in a state in which the oil phase and the aqueous phase coexist. By producing the cosmetic preparation using the above ingredients and preparation method, the oil phase and the aqueous phase do not mix and emulsify, and the cosmetic preparation can be stored in a state in which the two phases are separated.

[0042] The method of using the two-layer separated cosmetic composition according to this embodiment will now be described. The two-layer separated cosmetic composition can be used by leaving it to stand and then discharging it using a means such as an airless pump, or by discharging it from a tube. Alternatively, the container can be shaken before use and then discharged from the container's discharge port, which can then be applied to the user's skin, etc. [Example]

[0043] The present invention will be described in more detail below using examples, but the present invention is not limited to the following examples.

[0044] Cosmetics of the present invention were prepared using the compositions shown in Tables 1 to 5 below, including serums, lotions, makeup bases, and foundations, and their properties were evaluated. The numerical values ​​in the tables are expressed in mass % when the mass of the entire composition is taken as 100%. The viscosity of the oil phase was measured using a Toki Sangyo B-type viscometer at 25°C using a No. 4 rotor at 12 rpm for 30 seconds (when the viscosity was 50,000 mPa·s or less), a No. 4 rotor at 6 rpm for 60 seconds (when the viscosity was 100,000 mPa·s or less), or a No. 4 rotor at 3 rpm for 120 seconds (when the viscosity was 200,000 mPa·s or less). The other evaluation criteria listed in each table were as follows:

[0045] Cool / warm sensation ◎: Cooling and warming effects are felt when used. 〇: Moderate cooling and warming effect is felt when used △: A slight cooling / warming effect is felt when used ×: No cooling or warming effect is felt when used, or the effect is too strong and unsuitable for use. stability ◎: Cooling and warming effects are maintained well over time 〇: The cooling and warming effect can be maintained over time ×: Cooling and warming effects disappear over time Usability ◎: The water and oil phases mix very well when used. 〇: The water and oil phases mix properly when used ×: The water and oil phases are difficult to mix when used, or are already mixed in an uneven state.

[0046] [Table 1]

[0047] [Table 2] In all of Examples 6 to 10, the viscosity of the oil phase component was 100,000 mPa·s or higher.

[0048] [Table 3] In all of Examples 11 to 15, the viscosity of the oil phase component was 100,000 mPa·s or higher.

[0049] [Table 4] In all of Examples 16 to 20, the viscosity of the oil phase component was 100,000 mPa·s or more.

Claims

1. (A) an oil phase containing 5 to 50 mass% of a component that generates heat of solution and a thickener; (B) an aqueous phase; the component that generates heat of dissolution is erythritol or magnesium sulfate, and the viscosity of the oil phase is 5,000 to 150,000 mPa s; The two-layer separation cosmetic preparation has an oil phase and an aqueous phase that are separated when left standing.

2. The two-layer separated cosmetic according to claim 1, wherein the oil phase contains an oil agent and the oil phase comprises 15 to 65% by mass.

3. The two-layer separated cosmetic preparation according to claim 1 or 2, wherein the aqueous phase comprises water.

4. The two-layer separated cosmetic according to any one of claims 1 to 3, which does not contain a surfactant.

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