Cosmetic containing disintegrative particles

Abstract

To provide a cosmetic composition in which the disintegratability of oily particles can be controlled by a simple combination of components since there is known an oil-in-water type cosmetic composition in which a solid fat having a high melting point such as a higher alcohol and a cholesterol ester and oily particles consisting of an oily component which is liquid at room temperature are dispersed in an aqueous solvent and there is a known problem that particles which are difficult to crush and spread with fingers when applied to the skin are formed by blending a solid fat such as a higher alcohol and a cholesterol ester having a high melting point which does not dissolve at skin temperature.SOLUTION: There is provided a cosmetic containing disintegrative particles in which the hardness of oily particles is adjusted by incorporating a solid fat having a melting point of 40°C or more as an oily component, a lipophilic insoluble component in an oily component and a hydrophilic polymer in an aqueous solvent.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention is applicable as a composition for external use such as cosmetics, and relates to a cosmetic composition in which oily particles are dispersed in an aqueous solvent, in which the disintegration property of the oily particles can be controlled. [Background technology]

[0002] Cosmetics in which oily particles are dispersed in a water dispersion are known. For example, a liquid crystal emulsion composition has been proposed in which a higher alcohol, which is a solid that does not dissolve in oil, and a fatty acid are formed as oily particles together with a liquid oil and dispersed (Patent Document 1). In addition, an oil-in-water emulsion cosmetic in which a specific amount of solid oil such as a higher alcohol and / or paste oil is contained as the oil and emulsified droplets are formed has been proposed (Patent Document 2). Cosmetics in an emulsified state in which oily particles containing a component selected from solid wax, dihydric higher alcohol, cyclic alcohol and its fatty acid ester, fatty acid ester of polyhydric alcohol (melting point 40°C or higher), phospholipids, and liquid oil such as hydrocarbons are dispersed are known (Patent Document 3). In addition, a cosmetic in which oily particles encapsulating a cholesteric liquid crystal structure component mainly composed of cholesterol ester are dispersed in a cosmetic solution (Patent Document 4), and a composition in which an oily component containing a solid component with a more preferable melting point of 50 to 70°C is encapsulated and dispersed in an aqueous solvent are known (Patent Document 5).

[0003] As described above, compositions in which oily particles prepared by mixing an oily component with a high melting point that is solid at room temperature and an oil that is liquid at room temperature are dispersed in an aqueous solvent are well known. However, in order to mix a solid fat with a high melting point and an oily component that is liquid at room temperature, such compositions are heated to above the melting point of the solid fat to prepare oil droplets, and then the oily particles are formed in a subsequent cooling process. In the cooling process, since the oil droplets in a liquid state at high temperatures are cooled from the outside, the oily component with a high melting point solidifies and forms particles by a mechanism that gradually removes the liquid as the temperature decreases. Therefore, the outer shell of the oily particles is formed from the oily component with a high melting point. Therefore, compositions containing solid fats such as higher alcohols and cholesterol esters with high melting points that do not melt at skin temperature form a shell on the surface of the oily particles, and therefore have the problem that they are difficult to crush with fingers when applied to the skin, are difficult to spread, and do not blend well with the skin (Patent Documents 1 to 6).

[0004] [Patent Document 1] JP 2007-009199 A [Patent Document 2] JP 2010-053150 A [Patent Document 3] JP 2007-238516 A [Patent Document 4] Publication No. 3235948 [Patent Document 5] JP 2003-073230 A [Patent Document 6] JP 2012-20965 A Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, in oil-in-water type cosmetics in which oil particles are dispersed in water, it is possible to form oil particles of different sizes by changing the physical stirring force when adding the oil component to the aqueous solvent, even with the same component composition. However, by blending solid fats such as higher alcohols and cholesterol esters with high melting points that do not dissolve at skin temperature, there is a problem that particles are formed that are difficult to crush and spread with fingers when applied to the skin. Therefore, the object of the present invention is to obtain a cosmetic composition in which the disintegration property of oil particles can be controlled by a simple combination of components. [Means for solving the problem]

[0006] As a result of intensive research to solve the above problems, the present inventors discovered that the hardness of the oily particles can be adjusted by including a solid fat having a melting point of 40°C or higher as the oily component and including a lipophilic insoluble component in the oily component, and thus completed the disintegrable particle-containing cosmetic preparation of the present invention. That is, the present invention relates to the disintegrable particle-containing cosmetic preparation described below.

[0007] [1] A cosmetic preparation containing disintegrable particles, which is an oily particle-containing composition in which particles that are an oily component are dispersed in an aqueous solvent, and which is characterized in that the oily component contains a solid fat (A) having a melting point of 40°C or higher, and the oily component contains a lipophilic insoluble component (B), and the aqueous solvent contains a water-soluble polymer (C). [2] The cosmetic preparation containing disintegrable particles according to [1], characterized in that the particles of the oily component have an average particle size of 0.1 mm or more. [3] The cosmetic preparation containing disintegrating particles according to [1] or [2], characterized in that the solid fat (A) is one or more components selected from the group consisting of higher alcohols having 16 or more carbon atoms and fatty acid esters. [4] The cosmetic preparation containing disintegrable particles according to [1] or [2], wherein the lipophilic insoluble component (B) is an organically modified clay mineral. [5] The cosmetic preparation containing disintegrating particles according to [1] or [2], characterized in that the water-soluble polymer (C) contains at least a polysaccharide represented by a repeating unit of the following general formula (1): [ka] [6] The cosmetic preparation containing disintegrating particles according to [4], characterized in that the lipophilic insoluble component (B) is one or two components selected from the group consisting of stearalkonium hectorite, disteardimonium hectorite, and dimethyl distearyl ammonium bentonite. [7] A method for producing a cosmetic preparation containing disintegrable particles, comprising adjusting an oily component containing a solid fat (A) having a melting point of 40°C or higher and a lipophilic insoluble component (B) to a temperature higher than the melting point of the solid fat (A), introducing the oily component into an aqueous solvent containing a hydrophilic polymer (C) adjusted to 40°C or higher, and cooling the mixture of the aqueous solvent and the oily component to 20-30°C to form oily particles with an average particle size of 0.1 mm or more in the aqueous solvent. Effect of the Invention

[0008] In the cosmetic composition containing disintegrable particles of the present invention, by including a solid fat having a melting point of 40°C or higher as an oily component, it is possible to form oily particles that are stable even at high temperatures, and by including a lipophilic insoluble component, the hardness of the oily particles that become hard and difficult to crush due to the solid fat can be adjusted, making them easier to disintegrate. The cosmetic composition thus obtained can be easily applied with an applicator such as a finger or a brush without using a specific container.

[0009] Furthermore, such disintegrable particle-containing cosmetics can also be in a state in which visible particles are dispersed in an aqueous solvent. In such cases, by blending a pigment or the like as a lipophilic insoluble component, it is possible to create a composition that has a strong visual impact. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The disintegrable particle-containing cosmetic of the present invention will be described in detail below. The disintegrable particle-containing cosmetic of the present invention comprises particles made of an "oily component" and an "aqueous solvent" for dispersing the particles.

[0011] The "oil component" is characterized by containing at least a solid fat (A) having a melting point of 40° C. or higher, and a lipophilic insoluble component (B).

[0012] Examples of the solid fat (A) having a melting point of 40° C. or higher include hydrocarbons such as ceresin, paraffin, paraffin wax, microcrystalline wax, vaseline, and polyethylene wax; waxes such as beeswax, carnauba wax, candelilla wax, jojoba wax, lanolin, shellac wax, spermaceti, and shellac wax; fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid; higher alcohols such as lauryl alcohol, myristyl alcohol, cetanol, cetearyl alcohol, stearyl alcohol, arachidyl alcohol, and behenyl alcohol; and batyl alcohol and chimyl alcohol. Examples of the glyceryl ether include alkyl glyceryl ether, ceramides such as ceramide 1, ceramide 2, ceramide 3, ceramide 4, ceramide 5, ceramide 6I, ceramide 6II, ceramide 7, ceramide 8, ceramide 9, and ceramide 10, cholesterol, phytosterol, silicone waxes, sugar fatty acid esters such as dextrin myristate, dextrin palmitate, dextrin stearate, fructan and oligosaccharide stearate, and inulin stearate, glycerin fatty acid esters such as glyceryl behenate, glyceryl stearate, and glyceryl (behenic acid / eicosanedioic acid), as well as animal and vegetable oils and fats, and hardened oils of animal and vegetable oils and fats. One or more of these can be selected and used.

[0013] There is no particular restriction on the selection of solid fats, but when stability at high temperatures is required, a component having a melting point of 60°C or higher can be preferably used. On the other hand, in terms of ease of dissolution in the manufacturing process, a component having a melting point of less than 100°C can be preferably used. As such solid fats, one or more selected from the group consisting of higher alcohols and fatty acid esters having 16 or more carbon atoms can be selected and used. For example, the solid fats are preferably selected from the group consisting of higher alcohols such as cetearyl alcohol, stearyl alcohol, arachidyl alcohol, and behenyl alcohol, alkyl glyceryl ethers such as batyl alcohol and chimyl alcohol, and glycerin fatty acid esters such as glyceryl monostearate and glyceryl (behenic acid / eicosanedioic acid).

[0014] The amount of solid fat in the "oil component" varies depending on the hardness and size required for the particles, but considering the balance between stability and disintegrability, it is preferably 5 to 50% by mass, more preferably 10 to 30% by mass. If the amount is less than 5% by mass, the particles become soft, which may cause stability concerns. On the other hand, if it exceeds 50% by mass, it tends to be difficult to adjust the disintegrability.

[0015] The disintegrability of the present invention refers to the disintegration of particles contained in the cosmetic due to friction, pressure, etc., when the cosmetic is rubbed on the skin. This disintegrability of the particles allows the cosmetic to be easily spread evenly and to have a property that is compatible with the skin. It is preferable that the particles do not disintegrate as much as possible when mixed in a fluid during the production of the cosmetic, and that the particles have a moderate hardness that disintegrates due to pressure or friction when used. In addition, as described above, the disintegrability of the particles can be adjusted by adjusting the amount of solid fat blended, but if the amount of solid fat blended is reduced to make soft particles that are easy to crush, the particles tend to coalesce, and it tends to be difficult to form particles in an aqueous solvent. Therefore, a large amount of solid fat is blended to prevent the particles from coalescing, and a lipophilic insoluble component (B) is blended to obtain disintegrability. Even when a large amount of solid fat is present, the lipophilic insoluble component is present so as to divide the continuous phase of the solid fat, so that disintegrable particles that can be crushed with fingers can be obtained. In particular, when behenyl alcohol, stearyl alcohol, or the like is used in high proportions as solid fats, they tend to crystallize into hard particles, but by adding insoluble components with small particle sizes, the formation of large crystals is prevented.

[0016] Preferred examples of the lipophilic insoluble component (B) include hydrophobically treated pigments, coloring materials such as pearls, hydrophobically treated fine particles of titanium oxide, ultraviolet scattering agents such as zinc oxide, and organically modified clay minerals, etc. One or more of these can be selected and used.

[0017] Examples of hydrophobic treatments include magnesium stearate treatment, aluminum stearate treatment, aluminum dimyristate treatment, isostearic acid treatment, glycolipid treatment, sodium lauroyl glutamate treatment, sodium stearoyl glutamate treatment, cocoyl glutamic acid treatment, polyglyceryl-2 tetraisostearate treatment, lauroyl lysine treatment, lecithin treatment, isopropyl titanium triisostearate treatment, sodium lauroyl aspartate treatment, triethoxycaprylylsilane treatment, isopropyl titanium triisostearate treatment, methicone treatment, hydrogen dimethicone treatment, dimethicone treatment, and the like.

[0018] In addition, the organically modified clay mineral is a water-swellable clay mineral (e.g., montmorillonite, saponite, hectorite, bentonite, etc.) in which the convertible cations present between the crystal layers are replaced with organic polar compounds or organic cations (e.g., quaternary ammonium salt-type cationic surfactants). The organically modified clay mineral used in the present invention is not particularly limited as long as it is a component commonly used in cosmetics, etc. Examples include stearalkonium hectorite, stearalkonium bentonite, disteardimonium hectorite, dimethyl distearyl ammonium bentonite, etc.

[0019] In addition, organically modified clay minerals are also commercially available as premixed products dissolved in silicone oil, ester oil, and other oils, and premixes may also be used in the present invention. These premixes are commercially available, for example, from Elementis under the following product names: BENTONE GEL 1002V (Cyclopentasiloxane, Disteardimonium Hectorite, Propylene Carbonate), BENTONE GEL ABO V (Crambe Abyssinica Seed Oil, Stearalkonium Hectorite, Propylene Carbonate), BENTONE GEL CAO V (Castor Oil, Stearalkonium Hectorite, Propylene Carbonate), BENTONE GEL EUG V (Octyldodecanol, Disteardimonium Hectorite, Propylene Carbonate), BENTONE GTCC V (Caprylic / Capric Triglyceride, Stearalkonium Hectorite, Propylene Carbonate), BENTONE HSO V (Caprylic / Capric Triglyceride, Stearalkonium Hectorite, Propylene Carbonate), BENTONE IHD V (Isohexadecane, Disteardimonium Hectorite, Propylene Carbonate), BENTONE IPM V (isopropyl myristate, stearalkonium hectorite, propylene carbonate), BENTONE ISD V (isododecane, disteardimonium hectorite, hectorite), BENTONE LOI V (liquid lanolin, isopropyl palmitate, stearalkonium hectorite, propylene carbonate), BENTONE MSO(V) (meadowfoam oil, disteardimonium hectorite, propylene carbonate), BENTONE NGD V (neopentyl glycol diheptanoate, disteardimonium hectorite, propylene carbonate), BENTONE OLV V (olive fruit oil, stearalkonium hectorite, propylene carbonate), BENTONE OMS V ((C11,12) Isoparaffin, disteardimonium hectorite, denatured alcohol), BENTONE PTIS V (pentaerythrityl tetraisostearate, disteardimonium hectorite, propylene carbonate), BENTONE SS71V (petroleum volatiles, disteardimonium hectorite, propylene carbonate) BENTONE TMF V (methyl trimethicone, disteardimonium hectorite, triethyl citrate), BENTONE TN V (alkyl benzoate (C12-15), stearalkonium hectorite, propylene carbonate), BENTONE VS-5V(V) (cyclopentasiloxane, disteardimonium hectorite, denatured alcohol), BENTONE VS-5PC V(HV) (cyclopentasiloxane, disteardimonium hectorite, propylene carbonate), etc. These organically modified clay minerals are usually used as thickeners and stabilizers for water-in-oil emulsion compositions in which the external phase is an oil phase.

[0020] There is no particular restriction on the selection of the lipophilic insoluble component (B), but when it is desired to express the color tone by coloring with an oil-soluble organic dye or the like, or when it is desired to express the color tone of an oil-soluble active ingredient as is, an organically modified clay mineral that is not colored is preferably used to avoid coloring with a pigment. When it is used in makeup products such as foundation, lipstick, and blush as well as functioning as a colorant, a hydrophobic pigment or a hydrophobic pearl pigment is preferably used. An organically modified clay mineral is preferably used because it can be incorporated into both skin care and makeup products.

[0021] The amount of the lipophilic insoluble component (B) in the "oil component" varies depending on the hardness required for the particles, but considering the balance between stability and disintegrability, it is preferably 2 to 60% by mass, more preferably 5 to 40% by mass. If the amount is less than 2% by mass, it tends to be difficult to affect the disintegrability of the particles. On the other hand, if it exceeds 60% by mass, the particles become soft and there is a concern about stability.

[0022] The "oil component" may be a liquid oil that can be used in compositions such as cosmetics, or a component that is poorly soluble in water, as an oil component other than the above-mentioned solid fat. The liquid oil that constitutes the oily particle composition of the present invention is an oil component that is liquid at room temperature (25°C). The liquid oil forms oily particles together with the solid fat, making the oily particles easier to crush on the skin and improving skin compatibility. If only the solid fat is used, the oily particles will be hard and will not blend well with the skin, resulting in a poor feel when used.

[0023] Examples of liquid oils constituting the "oil-based particle composition" of the present invention include silicone oils, hydrocarbons, vegetable oils, higher alcohols, fatty acids, and synthetic esters such as fatty acid esters, organic acid esters, and glycerides.

[0024] Examples of silicone oils include dimethicone (dimethylpolysiloxane), highly polymerized dimethicone (highly polymerized dimethylpolysiloxane), cyclomethicone (cyclic dimethylsiloxane, decamethylcyclopentasiloxane), phenyl trimethicone, diphenyl dimethicone, phenyl dimethicone, (aminoethyl aminopropyl methicone / dimethicone) copolymer, dimethiconol, dimethiconol crosspolymer, silicone resin, silicone rubber, amino-modified silicones such as aminopropyl dimethicone and amodimethicone, cationic modified silicones, polyether-modified silicones such as dimethicone copolyol, Examples include polyglycerin-modified silicone, sugar-modified silicone, carboxylic acid-modified silicone, phosphate-modified silicone, sulfate-modified silicone, alkyl-modified silicone, fatty acid-modified silicone, alkyl ether-modified silicone, amino acid-modified silicone, peptide-modified silicone, fluorine-modified silicone, cation-modified and polyether-modified silicone, amino-modified and polyether-modified silicone, alkyl-modified and polyether-modified silicone, amidoalkyl-modified silicone, aminoglycol-modified silicone, aminophenyl-modified silicone, polysiloxane-oxyalkylene copolymer, etc.

[0025] Examples of hydrocarbons include liquid paraffin (mineral oil), heavy liquid isoparaffin, light liquid isoparaffin, α-olefin oligomer, polyisobutene, hydrogenated polyisobutene, polybutene, squalane, and olive-derived squalane. Types of hydrocarbons also include fluorinated hydrocarbons such as perfluoropolyether, perfluorodecalin, and perfluorooctane. Examples of vegetable oils include coconut oil, palm oil, palm kernel oil, safflower oil, olive oil, castor oil, avocado oil, sesame oil, tea oil, evening primrose oil, wheat germ oil, macadamia nut oil, hazelnut oil, kukui nut oil, rosehip oil, meadowfoam oil, persic oil, tea tree oil, peppermint oil, corn oil, rapeseed oil, sunflower oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, peanut oil, rice bran oil, cacao butter, shea butter, hydrogenated coconut oil, hydrogenated castor oil, jojoba oil, and hydrogenated jojoba oil. Examples of higher alcohols include oleyl alcohol, 2-hexyldecanol, 2-octyldodecanol, isostearyl alcohol, hexyldodecanol, octyldodecanol, 2-decyltetradecinol, etc., and examples of fatty acids include oleic acid, docosahexaenoic acid (DHA), isostearic acid, etc. Examples of synthetic esters include octyldodecyl myristate, hexyldecyl myristate, octyldodecyl isostearate, cetyl palmitate, octyldodecyl palmitate, cetyl octanoate, hexyldecyl octanoate, isotridecyl isononanoate, isononyl isononanoate, octyl isononanoate, isotridecyl isononanoate, isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, octyldodecyl neodecanoate, oleyl oleate, octyl oleate, Ludodecyl, octyldodecyl ricinoleate, octyldodecyl lanolate, dicaprylyl carbonate, hexyldecyl dimethyloctanoate, octyldodecyl erucate, ethyl oleate, ethyl avocado oil fatty acid, isopropyl myristate, isopropyl palmitate, octyl palmitate, isopropyl isostearate, isopropyl lanolate, methylheptyl laurate, methylheptyl myristate, methylheptyl palmitate, methylheptyl isostearate, diethyl sebacate,Diisopropyl Sebacate, Dioctyl Sebacate, Diisopropyl Adipate, Dibutyloctyl Sebacate, Diisobutyl Adipate, Dioctyl Succinate, Triethyl Citrate, Cetyl Lactate, Hydrogenated Castor Oil Monoisostearate, γ-Erucalactone, Diisostearyl Malate, Glyceryl Trioctanoate, Glyceryl Trioleate, Glyceryl Triisostearate, Glyceryl Diisostearate, Caprylic / Capric Tri Glyceryl, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylic acid / capric acid / myristic acid / stearic acid), hydrogenated rosin triglyceride (hydrogenated ester gum), rosin triglyceride (ester gum), glyceryl behenate eicosandioate, trimethylolpropane trioctanoate, trimethylolpropane triisostearate, neopentyl glycol dioctanoate, neopentyl glycol dicaprate, 2-butyl-2-ethyl-1,3-propanediol dioctanoate, propylene glycol dioleate, pentaerythrityl tetraoctanoate, hydrogenated rosin pentaerythrityl, ditrimethylolpropane triethylhexanoate, ditrimethylolpropane isostearate / sebacic acid, pentaerythrityl triethylhexanoate, dipentaerythrityl hydroxystearic acid / stearic acid / rosin acid, diglyceryl diisostearate Examples of such glyceryl stearate include polyglyceryl tetraisostearate, polyglyceryl-10 nonaisostearate, polyglyceryl-8 deca(erucic acid / isostearate / ricinoleic acid), diglyceryl oligoester (hexyldecanoic acid / sebacic acid), glycol distearate (ethylene glycol distearate), 3-methyl-1,5-pentanediol dineopentanoate, and 2,4-diethyl-1,5-pentanediol dineopentanoate.

[0026] The amount of liquid oil in the "oil component" varies depending on the type of oil agent and the hardness required for the particles, and is appropriately selected, but considering the balance between stability and disintegrability, it is preferably 5 to 95% by mass, more preferably 50 to 90% by mass. If the amount is less than 5% by mass, the particles are hard and it is difficult to obtain disintegrability. On the other hand, if it exceeds 90% by mass, it tends to become difficult to control the disintegrability.

[0027] Furthermore, by adding oil-based coloring components such as oil-soluble dyes (Red 225, etc.), organic pigments (Orange No. 204, Red No. 202, etc.), colorants (Orange No. 205, Yellow No. 4, Blue No. 1, etc.) lakes (lakes with zirconium, barium, aluminum, etc.), and natural pigments (chlorophyll, β-carotene, etc.) as oil-based components, it is possible to color the oil-based particles to a desired color, and it is possible to impart visual appeal through color to the disintegrating particle-containing cosmetic of the present invention. Also, by adding an oil-soluble drug as an oil-based component, it is possible to impart the medicinal effects that such drugs should exhibit to the disintegrating particle-containing cosmetic, and it is possible to achieve sustained release of the drug and stability over time.

[0028] The hydrophilic polymer (C) in the "aqueous solvent" is not particularly limited as long as it can stably maintain the above-mentioned disintegrating particles and has an acceptable feel when used as a cosmetic. For example, plant-based polymers such as tamarind, gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar, algae colloid, fucoidan, trant gum, locust bean gum, and galactomannan, microbial polymers such as Alcaligenes-producing polysaccharides, diutan gum, xanthan gum, sclerotium gum, curdlan, gellan gum, fucogel, dextran, succinoglucan, and pullulan, animal-based polymers such as chitosan, casein, albumin, and gelatin, starch-based polymers such as starch, carboxymethyl starch, and methylhydroxypropyl starch, methylcellulose, ethylcellulose, methylhydroxypropylcellulose, carbo Examples of the polymers include hydroxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethylcellulose, crystalline cellulose, cellulose-based polymers such as cellulose powder, alginic acid-based polymers such as sodium alginate and propylene glycol alginate, vinyl-based polymers such as polyvinyl methyl ether, carboxyvinyl polymer, and alkyl-modified carboxyvinyl polymer, polyoxyethylene-based polymers, polyoxyethylene-polyoxypropylene copolymer-based polymers, acrylic polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylamide, polyethyleneimine, and cationic polymers. One or more of these may be selected and used.

[0029] When selecting the hydrophilic polymer (C), it is important that it has the ability to form particles in an aqueous solvent at high temperatures of 40°C or higher and maintain them stably. In general, a method is used to improve stability by blending a high concentration of hydrophilic polymer to increase the viscosity of the continuous phase. However, when considering the feel when used as a cosmetic, blending a high concentration of hydrophilic polymer can cause problems such as the formulation losing its freshness and becoming sticky.

[0030] Therefore, as the hydrophilic polymer (C), it is preferable to use a polysaccharide whose main chain is composed of aldohexose and acidic sugar and whose side chain has deoxy sugar. That is, since the methyl group contained in this deoxy sugar is hydrophobic, it generates hydrophobic-hydrophilic repulsion against aldohexose and acidic sugar. Due to this action, the polysaccharide does not self-crystallize and spreads out. In addition, all carbons of the aldohexo or acidic sugar in the main chain have HO and H groups, and are bonded to the aqueous component, which is the continuous phase, by hydrogen bonds to maintain a stable state. And by having deoxy sugar in the side chain, the hydrophobic methyl group protrudes outward due to hydrophobic-hydrophilic repulsion. Since the methyl group does not have hydrogen bonds, no electrostatic repulsion occurs with the oily particles, so it can approach the surface of the oily particles to the extent that van der Waals forces are generated. Therefore, the oily particles are stabilized by being fixed by van der Waals forces, and the cosmetic containing the disintegrable particles is stabilized.

[0031] The above-mentioned polysaccharides having deoxy sugars in their side chains include at least polysaccharides represented by the repeating unit of the following general formula (1). [ka] The polysaccharide of the above general formula (1) can be obtained, for example, as a product of Alcaligenes latus B-16 strain bacteria (FERM BP-2015). This polysaccharide is commercially available under the trade name Alcasealan (INCI name: Alcaligenes Polysacchaides, display name: Alcaligenes-produced polysaccharide, manufactured by Hakuto Co., Ltd.).

[0032] In order to obtain the cosmetic composition containing disintegrating particles of the present invention, it is not necessary to incorporate the polysaccharide of the above general formula (1), but in order to form large-sized particles in an aqueous solvent and maintain the state, it is necessary to stably maintain the particles at a temperature of 40°C or higher at which the particles are formed. Usually, a high concentration of hydrophilic polymer is added to an aqueous solvent to maintain a high viscosity and prevent creaming. However, if a high concentration of hydrophilic polymer is added to maintain a high viscosity even at high temperatures, the cosmetic composition spreads poorly and is difficult to apply evenly, and the stickiness during application and after drying becomes very strong. Therefore, when large-sized particles are formed in an aqueous solvent, the polysaccharide of the above general formula (1) can be preferably incorporated.

[0033] The amount of the hydrophilic polymer (C) is usually 0.01% by mass to 0.5% by mass, preferably 0.02% by mass to 0.3% by mass, and more preferably 0.05% by mass to 0.2% by mass, based on the total amount of the "aqueous solvent." If the amount of the hydrophilic polymer (C) is less than 0.01% by mass, sufficient dispersion stabilization effect may not be obtained when heated, while if the amount of the hydrophilic polymer (C) is more than 0.5% by mass, the viscosity of the "aqueous solvent" increases, making it difficult to efficiently form oily particles.

[0034] Furthermore, the "aqueous solvent" may contain, for example, general aqueous moisturizers such as glycerin, dipropylene glycol, 1,3-butylene glycol, and other aqueous solvents such as lower alcohols typified by ethanol. If necessary, other water-soluble components such as water-soluble drugs such as arbutin, ascorbic acid and its derivatives, and tranexamic acid and its derivatives may be added. Furthermore, water-soluble ultraviolet absorbers, chelating agents, pH adjusters, preservatives, dyes, fragrances, etc. may be added to the extent possible. The present invention does not limit the addition of these various additives within the scope of not interfering with the intended effect.

[0035] The method for producing a cosmetic containing disintegrating particles is to adjust the temperature to above the melting point of the "oil component", introduce the flowable "oil component" into an "aqueous solvent" adjusted to 20°C or higher, and cool the mixture of the "aqueous solvent" and the "oil component" to 20-30°C to form oil particles in the "aqueous solvent", thereby producing a cosmetic containing disintegrating particles. The temperature of the "oil component" may be any temperature that exceeds its melting point, and is generally 50-100°C, more preferably 65-90°C. On the other hand, the temperature of the "aqueous solvent" may be any temperature that does not immediately solidify the introduced "disintegrating particle composition" before forming particles, and is specifically 40-95°C, more preferably 40-70°C.

[0036] When introducing the "oil component" into the "aqueous solvent", an injection means such as a liquid transfer pump can be used. It is preferable to introduce the oil component by providing an injection port in the "aqueous solvent", and more preferably to introduce the oil component by providing an injection port at the bottom of the "aqueous solvent". If such injection is performed from the top of the "aqueous solvent", the "oil component" will not be introduced into the "aqueous solvent" and the oil component will float to the top of the "aqueous solvent", making it difficult to form particles.

[0037] During the introduction, it is preferable to introduce the "oil component" while stirring the "aqueous solvent". There are no particular limitations on the stirring conditions, but when large particles that can be seen with the naked eye of 0.1 mm or more, for example, about 0.1 to 5 mm, are desired, a propeller or paddle mixer or the like can be used at a relatively low speed, preferably at a rotation speed of about 10 to 1500 rpm, more preferably at a rotation speed of about 20 to 500 rpm. On the other hand, when particles less than 100 μm, for example, particles with an average particle size of about 1 to 20 μm, are desired, a disperser mixer or homomixer or the like can be used at a rotation speed of preferably about 3,000 to 16,000 rpm, more preferably about 4,000 to 10,000 rpm.

[0038] After the desired "oil component" is introduced, the cooling method is not limited as long as the final temperature is 20 to 30° C. When the "oil component" cools to below its melting point, it solidifies and oil particles are formed in the "aqueous solvent."

[0039] The mass ratio of the "oil component" to the "aqueous solvent" in the disintegrative particle-containing composition of the present invention can be freely selected depending on the desired product form, and is, for example, about 0.1:99.9 to 50:50 in mass ratio of "oil component":"aqueous solvent", and preferably 1:99 to 40:60.

[0040] The size of the disintegrating particles is not particularly limited, but if visual appeal is required, the particles should be of a size that is visible to the naked eye, and generally have an average particle size of 0.1 mm or more. The average particle size is preferably about 0.1 to 5 mm. If the average particle size is less than 0.1 mm, the visual appeal of the particles being visible to the naked eye is reduced.

[0041] The application mode of the present disintegrable particle-containing cosmetic is not particularly limited, and the desired disintegrable particle-containing cosmetic can be obtained by carefully selecting and blending the particles consisting of the "oil component" and the components of the "aqueous solvent" for dispersing the particles within a range that does not impair the effects of the present invention. Then, a cosmetic in a form in which disintegrable particles are dispersed in an aqueous solvent is provided. In addition, by using the produced composition of the present invention as an element to be added in the manufacturing process of a general cosmetic composition, a variety of formulations and forms of cosmetic compositions can be provided.

[0042] The product form that the disintegrating particle-containing cosmetic composition may take is not particularly limited, and it can be used, for example, as skin care products such as cleansing, lotion, beauty essence, milky lotion, cream, and pack, makeup products such as makeup base, foundation, blusher, lipstick, and eye shadow, fragrance, or body composition. EXAMPLES

[0043] The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples. Unless otherwise specified, the composition ratio is based on mass ratio (mass %).

[0044] [Examples 1 to 6, creams as cosmetic preparations containing disintegrating particles] A cream, which is a cosmetic composition containing disintegrable particles and has the composition shown in Table 1, was prepared by the following method. 1. Components 1 to 8 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. Note that, for Example 5, the pH was neutralized to 7 with 1% arginine (component 9), and the amount of the aqueous solvent was adjusted to 80 parts with purified water (component 8). 2. Ingredients 10 to 18 were heated to 80°C and mixed and stirred until homogenous to obtain an oily component. While stirring the aqueous solvent, which was kept at a temperature of 3.55°C or higher, at 250 rpm using a paddle mixer, the oily component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 18 ml / min using a liquid delivery pump. A pipette tip with an inner diameter of 0.47 mm was used as the injection port. 4. After the pouring was completed, stirring was stopped and the mixture was cooled to 20 to 30° C. to obtain the disintegrative particle-containing cosmetics of Examples 1 to 6.

[0045] [Creams of Comparative Examples 1 to 3] The creams of Comparative Examples 1 to 3 having the compositions shown in Table 2 were prepared in the same manner as the creams of the above-mentioned Examples. The average particle size, stability over time, and texture evaluated in the same manner as the above-mentioned creams are shown in Table 2.

[0046] <Average particle size> When the average particle size was 0.1 mm or more, the image was checked under a microscope, the diameters of 30 representative particles that were visible were read from the scale, and the average value was calculated, as shown in Figure 1. The sample was placed on a slide glass on a 0.5 mm lattice scale, and observed on the slide glass. The results are shown in Table 1. On the other hand, when the average particle size was less than 100 μm, the image was checked under a microscope, the diameters of 30 representative particles that were visible were similarly measured on the image, and the average value was calculated.

[0047] <Stability over time> The appearance of each composition after preparation was visually confirmed, and then the composition was left to stand at 40° C. and 50° C. for 3 months, and visually confirmed for any changes in state. The stability was evaluated according to the following criteria. The results are shown in Table 1. Evaluation criteria for stability over time: ○: No change in appearance △: Some coalescence or creaming is observed. ×: Significant coalescence or creaming is observed

[0048] <Feel of use> Furthermore, the texture of each cosmetic preparation after preparation was evaluated based on the following criteria. The results are shown in Table 1. Evaluation criteria for usability: A panel of 10 people used the cream, which was a cosmetic product containing oily particles, after preparation. 〇: More than 7 out of 10 people felt that it was easy to spread evenly and that it blended smoothly into the skin. △: 4 to 6 out of 10 people felt that it was easy to spread evenly and that it blended smoothly into the skin. ×: 3 or less out of 10 people felt that it was easy to spread evenly and that it blended smoothly into the skin.

[0049] [Table 1] *1: Alcasealan (Hakutosha) *2: Hiviswako 103 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) *3: PEMULEN TR-2 (manufactured by Lubrizol) *4: BRNTONEGEL EUG (octyldodecanol, disteardimonium hectorite, propylene carbonate, manufactured by Elementis) *5: BENTONE OLV V (Olive fruit oil, stearalkonium hectorite, propylene carbonate, manufactured by Elementis) *6: MIGLYOL GEL B (Tri(caprylic / capric acid)glyceryl, stearalkonium bentonite, propylene carbonate, manufactured by IOI Oleo) *7: Behenyl alcohol 65 (manufactured by Nikko Chemicals) *8: Cetearyl alcohol (manufactured by Koyu Alcohol Kogyo Co., Ltd.) *9: Batyl alcohol 100 (manufactured by Nikko Chemicals) *10: NIKKOL MGS-F50V (manufactured by Nikko Chemicals)

[0050] [Table 2]

[0051] The cosmetic creams containing disintegrating particles of Examples 1 to 6 formed particles with an average particle diameter of 0.8 mm or more, and while they had moisturizing effects in terms of their usage, they were obtained with a significantly different appearance from normal creams. Furthermore, they were evaluated as having excellent stability over 3 months at 40°C and 50°C, and as for the texture in use, they were evaluated as being easy to spread evenly and moisturizingly compatible with the skin. On the other hand, the creams of Comparative Examples 1 to 3 had the same appearance as the creams of the Examples, and were also evaluated as being easy to spread evenly and moisturizingly compatible with the skin, but because the particles were hard and not easily crushed on the skin, they were not evaluated as being easy to spread evenly and moisturizingly compatible with the skin.

[0052] [Examples 7 to 12, creams as cosmetic preparations containing disintegrating particles] A cream, which is a cosmetic composition containing disintegrable particles and has the composition shown in Table 3, was prepared by the following method. 1. Components 1 to 8 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. For Comparative Example 11, the pH was neutralized to 7 with 1% arginine (Component 9), and the amount of the aqueous solvent was adjusted to 80 parts with purified water (Component 8). 2. Ingredients 10 to 17 were heated to 80°C and mixed and stirred until homogenous to obtain an oily component. The aqueous solvent, which was kept at a temperature of 3.55°C or higher, was stirred at 6,000 rpm using a homomixer, while the oily component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 20 ml / min using a liquid delivery pump. A pipette tip with an inner diameter of 1.0 mm was used as the injection port. 4. After the pouring was completed, the mixture was cooled to 20 to 30° C. with stirring to obtain the disintegrative particle-containing cosmetics of Examples 7 to 12.

[0053] [Cream of Comparative Examples 4 to 6] The creams of Comparative Examples 4 to 6 having the compositions shown in Table 4 were prepared in the same manner as the creams of the above-mentioned Examples. The average particle size, stability over time, and texture evaluated in the same manner as the above-mentioned creams are shown in Table 4.

[0054] [Table 3] *11: Nomcoat HK-G (manufactured by Nisshin Oillio Co., Ltd.) *12: Leopearl KL2 (manufactured by Chiba Flour Mills)

[0055] [Table 4]

[0056] In the cosmetic creams containing disintegrating particles of Examples 7 to 12, particles with an average particle size of 5.0 to 8.0 μm were formed. Furthermore, the creams had excellent stability over three months at 40°C and 50°C, and the texture was evaluated as good, being easy to spread evenly and moisturizing on the skin. On the other hand, in the creams of Comparative Examples 4 and 5, the average particle size was 5.0 to 8.0 μm, which was the same as the creams of the Examples, but the particles were hard and not easily crushed on the skin, so the creams had a smooth texture, and few people rated them as being easy to spread evenly and moisturizing on the skin.

[0057] [Example 13 and Comparative Example 7, Cosmetic Serum as a Cosmetic Preparation Containing Disintegrating Particles] As shown below, a disintegrating particle-containing composition having the composition shown in Table 5-1 was prepared, and then 20 parts of the disintegrating particle-containing composition was added to 80 parts of a beauty serum having the composition shown in Table 5-2 while stirring with a propeller (150 rpm), to obtain a beauty serum that is a disintegrating particle-containing cosmetic preparation. The results of the evaluation of the average particle size, stability over time, and feel when used, which were evaluated in the same manner as the above cream, are shown in Table 6. <Oily particle-containing composition> Compositions containing disintegrative particles having the compositions shown in Table 5-1 were prepared in the following manner. 1. Components 1 to 6 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. 2. Ingredients 7 to 13 were heated to 80°C and mixed and stirred until homogenous to obtain an oily component. The aqueous solvent, which was kept at a temperature of 3.55°C or higher, was stirred at 100 rpm using a paddle mixer, while the oil component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 20 ml / min using a liquid delivery pump. A pipette tip with an inner diameter of 0.8 mm was used as the injection port. 4. After the injection was completed, stirring was stopped and the mixture was cooled to 20 to 30° C. to obtain a disintegrative particle-containing composition. <Beauty serum> A beauty essence having the composition shown in Table 5-2 was prepared in the following manner. 1. Components 1 to 6 and 9 were heated to 80° C. and stirred for 10 minutes at 8,000 rpm in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain mixture 1. 2. Mixture 1 was cooled to 20-30°C with stirring, and component 7 was added with propeller stirring. 3. Next, while measuring the pH, component 8 was added so that the pH became 6.0, thereby obtaining a beauty essence.

[0058] [Table 5-1] *13:Quinizarin Blue (TCI) was dissolved in triethylhexanoin to a concentration of 1%.

[0059] [Table 5-2]

[0060] [Table 6]

[0061] For the beauty essence of Example 13, which is a cosmetic preparation containing disintegrating particles, particles with an average particle diameter of 1.5 mm were formed, and from the usage mode, a beauty essence containing vitamin C derivative was obtained, which has a significantly different appearance from normal beauty essences, with colored visible particles dispersed.Furthermore, it has excellent stability over 3 months at 40°C and 50°C, and the feeling of use was also evaluated as good, being easy to spread evenly and moisturizing on the skin.On the other hand, for the beauty essence of Comparative Example 7, although the appearance was similar to that of the beauty essence of the Examples, the particles were hard and not easily crushed on the skin, so there were few evaluations that it was easy to spread evenly and moisturizing on the skin.

[0062] [Examples 14 and 15, Foundation as a cosmetic material containing disintegrating particles] A foundation, which is a cosmetic containing disintegrable particles and has the composition shown in Table 7, was prepared by the following method. The average particle size, stability over time, and texture were evaluated in the same manner as for the cream described above, and the results are shown in Table 7. 1. Components 1 to 6 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. 2. Components 7 to 13 were stirred in a dispersing mixer until homogenous to obtain mixture 2. 3. Mixture 2 and ingredients 14 to 18 were heated to 80°C and mixed and stirred until homogenous to obtain an oil component. The aqueous solvent, which was kept at a temperature of 4.55°C or higher, was stirred at 250 rpm using a paddle mixer, while the oily component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 10 ml / min using a liquid delivery pump. A pipette tip with an inner diameter of 0.75 mm, whose tip had been cut off, was used as the injection port. 5. After the pouring was completed, stirring was stopped and the mixture was cooled to 20 to 30° C. to obtain foundations, which are the cosmetic compositions containing disintegrable particles of Examples 12 and 13.

[0063] [Table 7] *14: ASL-1 TiO2 CR-50 (titanium oxide, sodium lauroyl glutamate, lysine, magnesium chloride, manufactured by Daito Kasei Kogyo Co., Ltd.) *15: ASL-1 YELLOW LL-100P (yellow iron oxide, sodium lauroyl glutamate, lysine, magnesium chloride, manufactured by Daito Kasei Kogyo Co., Ltd.) *16: ASL-1 RED R-516P (red iron oxide, sodium lauroyl glutamate, lysine, magnesium chloride, manufactured by Daito Kasei Kogyo Co., Ltd.) *17: ASL-1 BLACK BL-100P (black iron oxide, sodium lauroyl glutamate, lysine, magnesium chloride, manufactured by Daito Kasei Kogyo Co., Ltd.)

[0064] For the foundation of Example 14, particles with an average particle size of 0.8 mm were formed, and the foundation, which is a cosmetic containing disintegrable particles and which contained these particles, was evaluated as having excellent stability over three months at 40°C and 50°C, and also had a good feel in use, being easy to spread evenly and moisturizing to the skin. Furthermore, for the foundation of Example 15, particles with an average particle size of 1.2 mm were formed, and the foundation, which is a cosmetic containing disintegrable particles and which contained these particles, was evaluated as having excellent stability over three months at 40°C and 50°C, and also had a good feel in use, being easy to spread evenly and moisturizing to the skin.

[0065] [Examples 16 and 17, Foundation as a cosmetic material containing disintegrating particles] A foundation, which is a cosmetic containing disintegrable particles and has the composition shown in Table 8, was prepared by the following method. The average particle size, stability over time, and texture were evaluated in the same manner as for the cream described above, and the results are shown in Table 8. 1. Components 1 to 6 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. 2. Components 7 to 13 were stirred in a dispersing mixer until homogenous to obtain mixture 2. 3. Mixture 2 and ingredients 14 to 18 were heated to 80°C and mixed and stirred until homogenous to obtain an oil component. The aqueous solvent, which was kept at a temperature of 4.55°C or higher, was stirred at 8,000 rpm using a homomixer, while the oily component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 30 ml / min using a liquid delivery pump. A pipette tip with an inner diameter of 1.5 mm was used as the injection port. 5. After the pouring was completed, the mixture was cooled to 20 to 30° C. with stirring to obtain the foundations of Examples 16 and 17, which are the cosmetic compositions containing disintegrable particles.

[0066] [Table 8]

[0067] The foundations of Examples 16 and 17 formed particles with an average particle size of 5.0 to 7.0 μm. Furthermore, at 40° C. and 50° C., the foundations were excellent in stability over 3 months, and the texture was also evaluated as being good, being easy to spread evenly, and being moist and familiar to the skin. The foundation of Example 16 was also found to have a low covering power and an effect of making the skin look even, and it can be used as a makeup base. The foundation of Example 17 also has a covering power and can be used as a concealer.

[0068] [Example 18, Blusher as a cosmetic material containing disintegrating particles] A blusher containing disintegrable particles was prepared by the following method, and the composition of the blusher was shown in Table 9. The average particle size, stability over time, and texture were evaluated in the same manner as for the blusher described above, and the results are shown in Table 9. 1. Components 1 to 6 were heated to 80° C. and stirred at 8,000 rpm for 10 minutes in a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain an aqueous solvent. 2. Components 7 to 12 were stirred in a dispersing mixer until homogenous to obtain mixture 2. 3. Mixture 2 and ingredients 13 to 17 were heated to 80°C and mixed and stirred until homogenous to obtain an oily component. The aqueous solvent, which was kept at a temperature of 4.55°C or higher, was stirred at 200 rpm using a paddle mixer, while the oily component melted at 80°C was injected into the aqueous solvent from the bottom of the container at a rate of 15 / min using a liquid delivery pump. A pipette tip with an inner diameter of 1.0 mm was used as the injection port. 5. After the injection was completed, stirring was stopped and the mixture was cooled to 20 to 30° C. to obtain a blusher, which is the disintegrative particle-containing cosmetic material of Example 18.

[0069] [Table 9]

[0070] For the foundation of Example 18, particles with an average particle size of 1.3 mm were formed, and the blusher, which is a cosmetic containing disintegrable particles, containing these particles, had stability over 3 months at 50°C. The texture was also evaluated as good, being easy to spread evenly and moisturizing to the skin. The blusher had an unusual appearance, with visible pink-colored particles dispersed. [Brief description of the drawings]

[0071] [Figure 1] Oil particles in a cosmetic material are shown under a microscope.

Claims

1. The cosmetic preparation containing disintegrable particles is characterized in that it is an oily particle-containing composition in which particles which are an oily component are dispersed in an aqueous solvent, the oily component being a solid fat (A) having a melting point of 40°C or higher, the oily component being a lipophilic insoluble component (B), and the aqueous solvent being a hydrophilic polymer (C).

2. 2. The cosmetic preparation containing disintegrable particles according to claim 1, wherein the particles which are the oily component have an average particle size of 0.1 mm or more.

3. 3. The cosmetic preparation containing disintegrable particles according to claim 1, wherein the solid fat (A) is one or more components selected from the group consisting of higher alcohols having 16 or more carbon atoms and fatty acid esters.

4. 3. The cosmetic preparation containing disintegrable particles according to claim 1, wherein the lipophilic insoluble component (B) is an organically modified clay mineral.

5. 3. The cosmetic preparation containing disintegrable particles according to claim 1, wherein the hydrophilic polymer (C) contains at least a polysaccharide represented by a repeating unit of the following general formula (1): 【Chemistry 1】

6. 5. The cosmetic preparation containing disintegrable particles according to claim 4, wherein the organically modified clay mineral which is the lipophilic insoluble component (B) is one or two components selected from the group consisting of stearalkonium hectorite, disteardimonium hectorite, and dimethyl distearyl ammonium bentonite.

7. A method for producing a disintegrable particle-containing cosmetic, comprising adjusting an oily component containing a solid fat (A) having a melting point of 40°C or higher and a lipophilic insoluble component (B) to a temperature higher than the melting point of the solid fat (A), introducing the oily component into an aqueous solvent containing a hydrophilic polymer (C) adjusted to 40°C or higher, and cooling the mixture of the aqueous solvent and the oily component to 20-30°C, thereby forming oily particles having an average particle size of 0.1 mm or more in the aqueous solvent.

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