Cosmetics

Abstract

This invention provides a cosmetic product that reduces slipperiness despite having a low oil content of less than 1.0% by mass. [Solution] The cosmetic composition of this disclosure contains a polyglycerin fatty acid ester with an OH / C ratio of 0.20 to 0.80, and a thickener, and has an oil content of less than 1.0% by mass.

Description

Technical Field

[0001] The present disclosure relates to cosmetics.

Background Art

[0002] In recent years, various cosmetics have been developed.

[0003] Patent Document 1 discloses an emulsified composition used for makeup bases and the like, containing (A) sorbitan fatty acid ester, (B) a colored pigment treated with a surface treatment agent containing an alkyl group having 3 or more carbon atoms, (C) a non-volatile oil that is liquid at 25°C, (D) a carbonate, and (E) water, and having a reduced slipperiness during application.

[0004] Patent Document 2 discloses a cosmetic without a slipperiness feeling, formulated with a specific water-soluble thickener.

[0005] Patent Document 3 discloses a vesicle-containing cosmetic containing a dispersion medium containing water and vesicles dispersed in this dispersion medium, wherein the vesicles are formed of at least one polyglycerol fatty acid ester having an OH / C ratio of 0.20 to 0.80, and the bilayer of the vesicles contains an oil component.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] As described in Patent Documents 1 and 2, in the field of cosmetics, there has been a desire to reduce the slippery feeling when applied. Furthermore, while the use of thickeners can impart a moist feeling to cosmetics, it can sometimes cause a slippery feeling. In such cases, as described in Patent Document 1 (paragraph

[0022] ), for example, it has been common to reduce the slippery feeling by incorporating oil into the cosmetic.

[0008] Therefore, the subject of this disclosure is to provide a cosmetic composition in which the slipperiness is reduced despite having a low oil content of less than 1.0% by mass. [Means for solving the problem]

[0009] <Aspect 1> It contains a polyglycerol fatty acid ester with an OH / C ratio of 0.20 to 0.80, and a thickening agent, and The oil content is less than 1.0% by mass. Cosmetics. <Aspect 2> The cosmetic composition according to embodiment 1, wherein the number of carbon atoms in the fatty acid portion of the polyglycerin fatty acid ester is 10 or more and 17 or less. <Aspect 3> The cosmetic composition according to embodiment 1 or 2, wherein the polyglycerin portion of the polyglycerin fatty acid ester is formed of polyglycerin in dimers or decamers or less. <Aspect 4> The cosmetic composition according to embodiment 1, wherein the polyglycerin fatty acid ester is polyglyceryl-6 laurate. <Aspect 5> The cosmetic composition according to any one of embodiments 1 to 4, wherein the content of the polyglycerin fatty acid ester is 0.10% by mass or more. <Pattern 6> The cosmetic composition according to any one of embodiments 1 to 5, wherein the thickening agent comprises at least one selected from the group consisting of carbomer, xanthan gum, cellulose gum, (dimethylacrylamide / sodium acryloyldimethyl taurate) crosspolymer, and (PEG-240 / decyltetradeceth-20 / HDI) copolymer. <Aspect 7> The cosmetic composition according to any one of embodiments 1 to 6, wherein the content of the thickening agent is 0.30% by mass or less. <Aspect 8> The cosmetic composition according to any one of embodiments 1 to 7, wherein the contact angle of the cosmetic composition with respect to the polymethyl methacrylate substrate is 30.0° or more and 44.0° or less. <Pattern 9> A cosmetic composition according to any one of embodiments 1 to 8, wherein the viscosity is 1,000 mPa·s or less. [Effects of the Invention]

[0010] According to this disclosure, it is possible to provide a cosmetic composition that has reduced slipperiness despite having a low oil content of less than 1.0% by mass. [Modes for carrying out the invention]

[0011] The embodiments of this disclosure will be described in detail below. This disclosure is not limited to the embodiments described below, and can be implemented in various ways within the scope of the essence of the invention.

[0012] The cosmetic composition of this disclosure contains a polyglycerin fatty acid ester with an OH / C ratio of 0.20 to 0.80, and a thickener, and has an oil content of less than 1.0% by mass.

[0013] Although not limited by principle, we believe that the mechanism by which the cosmetic composition disclosed herein reduces slipperiness despite having a low oil content of less than 1.0% by mass is as follows.

[0014] In the present disclosure, the "OH / C ratio" means the ratio of the number of hydroxyl groups in the polyglycerol part to the number of carbon atoms in the fatty acid part, and it is a parameter related to the balance between hydrophilicity and lipophilicity. And the cosmetics of the present disclosure employ a specific polyglycerol fatty acid ester with an OH / C ratio of 0.20 to 0.80. Such a polyglycerol fatty acid ester is more lipophilic than, for example, polyglyceryl-10 laurate with an OH / C ratio of 0.92 and has a good affinity for the skin. Therefore, even if the amount of oil blended to reduce the slipperiness on the skin is low or non-existent, the cosmetics of the present disclosure contain a specific polyglycerol fatty acid ester that is easy to adhere to the skin, so it is considered that the slipperiness of the cosmetics can be reduced.

[0015] Conventionally, it has been common to reduce the slipperiness by blending oil into cosmetics. However, when oil is blended, there may be inconveniences such as instability in the stability (e.g., emulsion stability) or a decrease in transparency in the cosmetics. Since the cosmetics of the present disclosure can be formulated without oil or with a low oil content, they can also contribute to the improvement of stability and transparency.

[0016] 《Cosmetics》 〈Polyglycerol Fatty Acid Ester〉 The cosmetics of the present disclosure contain a polyglycerol fatty acid ester (sometimes simply referred to as "polyglycerol fatty acid ester" or "specific polyglycerol fatty acid ester") with an OH / C ratio of 0.20 to 0.80. Such a polyglycerol fatty acid ester can be used alone or in combination of two or more.

[0017] From the perspective of the effect of reducing the slippery feeling, the blending amount of polyglycerol fatty acid ester is preferably 0.10% by mass or more, 0.30% by mass or more, 0.50% by mass or more, 0.70% by mass or more, or 1.0% by mass or more based on the total amount of the cosmetic. There is no particular limitation on the upper limit value of such a blending amount, and for example, it can be 20% by mass or less, 15% by mass or less, 10% by mass or less, or 7.0% by mass or less. When the blending amount is 5.0% by mass or less, 3.0% by mass or less, or 2.0% by mass or less, the film feeling after applying the cosmetic can also be reduced or suppressed.

[0018] As shown by the following reaction formula, polyglycerol fatty acid ester can be prepared by esterifying a fatty acid and polyglycerol:

Chem.

[0019] Here, in the polyglycerol fatty acid ester, the part derived from the fatty acid can be called the fatty acid part, and the part derived from the polyglycerol can be called the polyglycerol part. The fatty acid part corresponds to the lipophilic part, and the polyglycerol part corresponds to the hydrophilic part.

[0020] From the perspective of the effect of reducing the slippery feeling, the OH / C ratio of the polyglycerol fatty acid ester is preferably 0.20 or more, 0.25 or more, 0.30 or more, 0.35 or more, 0.40 or more, 0.42 or more, 0.45 or more, 0.50 or more, or 0.55 or more, and is preferably 0.80 or less, 0.75 or less, 0.70 or less, 0.65 or less, 0.63 or less, 0.61 or less, or 0.60 or less.

[0021] As described above, in this disclosure, the "OH / C ratio" refers to the ratio of the number of hydroxyl groups in the polyglycerin portion to the number of carbon atoms in the fatty acid portion, and is a parameter relating to the balance between hydrophilicity and lipophilicity. For example, in the case of polyglyceryl-6 laurate, the fatty acid portion has 12 carbon atoms, and the polyglycerin portion is a hexamer with 7 hydroxyl groups (=6+1), so the OH / C ratio is approximately 0.58 (=7 / 12). Polyglycerin fatty acid esters with an OH / C ratio of 0.20 to 0.80 in this disclosure possess both hydrophilic and lipophilic properties and can therefore function as surfactants.

[0022] As for polyglycerin fatty acid esters, from the viewpoint of ease of absorption into the skin, that is, reducing a slippery feeling, the number of carbon atoms in the fatty acid portion is preferably 10 or more or 11 or more, more preferably 12 or more, and also preferably 17 or less, 16 or less, or 15 or less, and more preferably 14 or less or 13 or less.

[0023] The fatty acids that can be used when preparing polyglycerol fatty acid esters may be saturated or unsaturated fatty acids, and may be straight-chain or branched-chain fatty acids. Examples of such fatty acids include lauric acid, myristic acid, and palmitic acid. Among these, myristic acid and lauric acid are preferred from the viewpoint of reducing slipperiness, and lauric acid is more preferred.

[0024] From the viewpoint of balancing the lipophilicity and dispersive effect in cosmetics of polyglycerin fatty acid esters, and the resulting effect of reducing slipperiness, the polyglycerin portion of the polyglycerin fatty acid ester is preferably 10-mer or less, 9-mer or less, or 8-mer or less, more preferably 7-mer or less, or 6-mer or less, and also preferably 2-mer or more, 3-mer or more, or 4-mer or more, and more preferably 5-mer or more, or 6-mer or more. Here, the value of n in the polyglycerin fatty acid ester in the above reaction formula is, for example, the same as the value of 6 in a 6-mer.

[0025] Specific examples of polyglycerin fatty acid esters with an OH / C ratio of 0.20 to 0.80 include polyglyceryl-6 myristate, polyglyceryl-2 laurate, polyglyceryl-4 laurate, polyglyceryl-5 laurate, polyglyceryl-6 laurate, and polyglyceryl-10 palmitate. Among these, polyglyceryl-6 myristate, polyglyceryl-4 laurate, and polyglyceryl-6 laurate are preferred from the viewpoint of reducing slipperiness, with polyglyceryl-6 laurate being the most preferred.

[0026] <Thickening agent> The cosmetic composition of this disclosure contains a thickening agent. Because the cosmetic composition of this disclosure contains the above-mentioned specific polyglycerin fatty acid ester together with the thickening agent, it is possible to reduce or suppress slipperiness during application while providing a moisturizing effect.

[0027] From the viewpoint of exhibiting a moisturizing effect and reducing slipperiness, the amount of thickening agent blended is preferably 0.01% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.07% by mass or more, or 0.10% by mass or more, relative to the total amount of the cosmetic. There is no particular upper limit to such blending amount, and for example, it can be 5.0% by mass or less, 3.0% by mass or less, 1.0% by mass or less, 0.70% by mass or less, 0.50% by mass or less, 0.30% by mass or less, 0.15% by mass or less, 0.10% by mass or less, or less than 0.10% by mass. If the amount of thickening agent blended is greater than 0.30% by mass, the cosmetic tends to take on a gel form, and if it is greater than 0.10% by mass and less than or equal to 0.30% by mass, the cosmetic tends to take on a cream form. If the amount of thickening agent blended is 0.30% by mass or less, the feeling of a film after application of the cosmetic can also be reduced or suppressed.

[0028] As thickeners, those commonly used in cosmetics can be used. Specifically, examples include various hydrophilic thickeners (aqueous phase thickeners) that enhance the viscosity of the aqueous phase in cosmetics, such as natural water-soluble polymers, semi-synthetic water-soluble polymers, synthetic water-soluble polymers, and inorganic thickeners. Thickeners can be used alone or in combination of two or more types.

[0029] Examples of natural water-soluble polymers include plant-based polymers such as gum arabic, tragacanth gum, galactan, guar gum, carrageenan, pectin, quince seed extract, agar, and brown algae powder; microbial polymers such as xanthan gum, dextran, pullulan, and succinoglycan; and animal-based polymers such as collagen, casein, albumin, and gelatin.

[0030] Examples of semi-synthetic water-soluble polymers include starch-based polymers such as carboxymethyl starch and methylhydroxy starch; cellulose-based polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, stearoxyhydroxypropylmethylcellulose, cellulose sulfate, hydroxypropylcellulose, carboxymethylcellulose (cellulose gum), and crystalline cellulose; and alginate-based polymers such as sodium alginate and propylene glycol alginate.

[0031] Examples of synthetic water-soluble polymers include vinyl polymers such as polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinylpyrrolidone, vinylpyrrolidone and vinyl acetate copolymers, and carboxyvinyl polymers (carbomers); acrylic polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, acrylic acid / alkyl methacrylate copolymers (e.g., (acrylates / alkyl acrylate (C10-30)) crosspolymer), polyacrylic acid alkanolamine, alkyl methacrylate and dimethylaminoethyl methacrylate copolymers, poly2-acrylamide-2-methylpropanesulfonic acid, polymethacryloyloxytrimethylammonium, (ammonium acryloyldimethyltaurate / VP) copolymer, and (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer; and urethane polymers such as hydrophobic modified polyether urethane (PEG-240 / decyltetradeceth-20 / HDI) copolymer.

[0032] Examples of inorganic thickeners include bentonite, laponite, hectorite, magnesium aluminum silicate, and anhydrous silicic acid.

[0033] Among the thickening agents, at least one selected from the group consisting of carbomer, xanthan gum, cellulose gum, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, and (PEG-240 / decyltetradeceth-20 / HDI) copolymer is preferred, from the viewpoint of reducing slipperiness when used in combination with the polyglycerin fatty acid esters mentioned above. Carbomer and / or (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer are more preferred, and carbomer is particularly preferred.

[0034] <Dispersion medium> The cosmetic composition of this disclosure may contain water as a dispersion medium (aqueous phase).

[0035] (water) There are no particular restrictions on the amount of water used. For example, the amount of water can be 20% or more by mass, 30% or more by mass, 40% or more by mass, 50% or more by mass, 60% or more by mass, 70% or more by mass, or 80% or more by mass, relative to the total amount of the cosmetic. It can also be 95% or less by mass, 90% or less by mass, 85% or less by mass, 80% or less by mass, 75% or less by mass, 70% or less by mass, 65% or less by mass, 60% or less by mass, 55% or less by mass, or 50% or less by mass.

[0036] There are no particular restrictions on the type of water that can be used in cosmetics; for example, water used in cosmetics and quasi-drugs can be used. For example, deionized water, distilled water, ultrapure water, and tap water can be used.

[0037] <Optional ingredients> The cosmetic composition disclosed herein may contain various components as appropriate, provided that they do not adversely affect the effects of the disclosed composition. Such components include additives commonly found in cosmetics, such as surfactants other than polyglycerin fatty acid esters (e.g., anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants), humectants, water-soluble polymers, oil-soluble polymers, film-forming agents, higher fatty acids, metal ion chelating agents, alcohols (e.g., lower alcohols such as ethanol, higher alcohols, polyhydric alcohols), various extracts, sugars, amino acids, organic amines, polymer emulsions, chelating agents, stabilizers, UV absorbers, pH adjusters, skin nutrients, vitamins, water-soluble agents applicable to pharmaceuticals, quasi-drugs, cosmetics, etc., buffers, anti-fading agents, preservatives, propellants, fillers, colorants (e.g., pigments, dyes, colorants), fragrances, and the like. Any component may be used alone or in combination of two or more.

[0038] (Oil content) The cosmetic composition of this disclosure does not have to contain oil, but may contain oil in an amount of less than 1.0% by mass. In this disclosure, "oil" means a component that is not miscible with water at room temperature (e.g., 25°C) (e.g., a liquid component), and for example, a component that undergoes phase separation when water and oil are stirred and mixed at room temperature and then left to stand for one hour or more. Therefore, components that can be mixed with water at room temperature in any proportion to form a homogeneous solution, such as glycerin and polyglycerin fatty acid esters, do not fall under the definition of "oil" in this disclosure.

[0039] When oil is included, the total amount of oil in the cosmetic can be less than 1.0% by mass, 0.50% by mass or less, or 0.30% by mass or less, relative to the total amount of the cosmetic. When the amount of oil is less than 0.30% by mass, 0.20% by mass or less, 0.15% by mass or less, 0.10% by mass or less, less than 0.10% by mass, 0.07% by mass or less, 0.05% by mass or less, 0.03% by mass or less, or 0.01% by mass or less, the stability of the cosmetic (e.g., stability in low-temperature environments (e.g., 5°C)) and transparency can also be improved. Lower oil content can also reduce or suppress problems such as stickiness. Among oils, polar oils tend to reduce the stability of the cosmetic composition of this disclosure. Therefore, from the viewpoint of cosmetic composition stability and other factors, the amount of polar oil blended is preferably less than 0.30% by mass, 0.20% by mass or less, 0.15% by mass or less, 0.10% by mass or less, less than 0.10% by mass, 0.07% by mass or less, 0.05% by mass or less, 0.03% by mass or less, or 0.01% by mass or less, as described above.

[0040] If the product contains oil, the oils that can be used are those that are commonly used in cosmetics. Examples of such oils include oils and fats (e.g., liquid oils and fats), hydrocarbon oils, silicone oils, and polar oils. The oils can be used alone or in combination of two or more types.

[0041] Examples of liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, peach oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, elm oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnamon oil, Japanese tuni oil, jojoba oil, wheat germ oil, and triglycerin.

[0042] Examples of hydrocarbon oils include heptane, isododecane, isohexadecane, isodecane, liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and olefin oligomers.

[0043] Examples of silicone oils include low molecular weight linear dimethylpolysiloxanes such as dimethylpolysiloxane with a viscosity of 0.65 cs (sometimes referred to as "dimethicone"), dimethylpolysiloxane with a viscosity of 1 cs, dimethylpolysiloxane with a viscosity of 1.5 cs, and dimethylpolysiloxane with a viscosity of 2 cs; low molecular weight branched siloxanes such as methyl trimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. In addition, chain-like silicones such as dimethylpolysiloxane with a viscosity of 6 cs or higher, methylphenylpolysiloxane (diphenylsiloxyphenyl trimethicone), and methylhydrogenpolysiloxane can also be used.

[0044] As polar oils, for example, polar oils with an IOB of 0.10 or higher can be used. Examples of such polar oils include isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), isopropyl palmitate (IOB value = 0.16), butyl stearate (IOB value = 0.14), hexyl laurate (IOB value = 0.17), myristyl myristate (IOB value = 0.11), decyl oleate (IOB value = 0.11), isononyl isononanoate (IOB value = 0.20), and isotridecyl isononanoate (I (IOB value = 0.15), Cetyl ethylhexanoate (IOB value = 0.13), Pentaerythrityl tetraethylhexanoate (IOB value = 0.35), Diethylhexyl succinate (IOB value = 0.32), Dioctyl succinate (IOB value = 0.36), Glycol distearate (IOB value = 0.16), Glyceryl diisostearate (IOB value = 0.29), Neopentyl glycol dicaprate (IOB value = 0.25), Diisostearyl malate (IOB value = 0.28) ), trimethylolpropane triisostearate (IOB value = 0.16), glyceryl tri-2-ethylhexanoate (triethylhexanoin) (IOB value = 0.35), trimethylolpropane trioctanoate (IOB value = 0.33), trimethylolpropane triisostearate (IOB value = 0.16), diisobutyl adipate (IOB value = 0.46), N-lauroyl-L-glutamic acid-2-octyldodecyl ester (IOB value = 0.29), adipic acid Examples include 2-hexyldecyl (IOB value = 0.16), diisopropyl sebacate (IOB value = 0.40), ethylhexyl methoxycinnamate (IOB value = 0.28), 2-ethylhexyl palmitate (IOB value = 0.13), 2-ethylhexyl ethylhexanoate (IOB value = 0.2), triisostearin (IOB value = 0.16), PPG-3 dipivalate (IOB value = 0.52), and tri(caprylic / capric acid) glyceryl (IOB value = 0.33).

[0045] The IOB value of polar oils can be, for example, 0.11 or higher, 0.12 or higher, or 0.13 or higher, and can also be 0.50 or lower, 0.45 or lower, or 0.40 or lower. Here, IOB value is an abbreviation for Inorganic / Organic Balance, and is a value that represents the ratio of inorganic value to organic value, and is an indicator of the degree of polarity of organic compounds. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. For each of the "inorganic value" and "organic value," for example, one carbon atom in a molecule has an "organic value" of 20, and one hydroxyl group has an "inorganic value" of 100. These values ​​are assigned according to the type of atom or functional group, and the IOB value of an organic compound can be calculated by summing the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound (see, for example, Yoshio Koda, "Organic Concept Diagram - Fundamentals and Applications," pp. 11-17, Sankyo Publishing, 1984).

[0046] (Anionic surfactant) In some embodiments, the cosmetic composition of this disclosure may contain an anionic surfactant. The amount of the anionic surfactant can be, for example, less than 0.1% by mass, 0.05% by mass or less, 0.01% by mass or less, less than 0.01% by mass, or 0.005% by mass or less, relative to the total amount of the cosmetic composition. Even if the cosmetic composition of this disclosure does not contain anionic surfactant or contains only a small amount of anionic surfactant, it can improve performance such as reducing slipperiness.

[0047] (alcohol) In some embodiments, the cosmetic composition of this disclosure may contain an alcohol. Examples of alcohols include lower alcohols, polyhydric alcohols, and higher alcohols. Examples of lower alcohols include monohydric alcohols having an alkyl group with 1 to 5 carbon atoms (e.g., ethanol). Examples of polyhydric alcohols include dipropylene glycol. Examples of higher alcohols include those with a carbon chain length of 16 or more (e.g., lauryl alcohol).

[0048] The amount of alcohol can be, for example, less than 10% by mass, 8.0% by mass or less, 5.0% by mass or less, 3.0% by mass or less, or 1.0% by mass or less, relative to the total amount of the cosmetic composition. The cosmetic composition of this disclosure can improve performance such as reducing slipperiness even if it does not contain alcohol or contains only a small amount of alcohol.

[0049] <Contact angle of cosmetics> In some embodiments, the contact angle of the cosmetic composition of this disclosure to the polymethyl methacrylate substrate can be 30.0° or higher, 33.0° or higher, 35.0° or higher, or 37.0° or higher, and can also be 44.0° or lower, 43.0° or lower, 42.0° or lower, or 41.0° or lower. Such contact angles can be determined by the contact angle test described later. Here, the polymethyl methacrylate substrate used in the contact angle test is a substrate that exhibits oleophilicity compared to the glass substrate used in general contact angle tests. Therefore, the smaller the contact angle, the more easily it adheres to the oleophilic (hydrophobic) surface, i.e., it exhibits oleophilic (hydrophobic) performance.

[0050] <Viscosity of cosmetics> In some embodiments, the viscosity of the cosmetic composition of this disclosure can be 1,000 mPa·s or less, 800 mPa·s or less, 600 mPa·s or less, 500 mPa·s or less, 400 mPa·s or less, or 350 mPa·s or less, and can also be 50 mPa·s or more, 100 mPa·s or more, 130 mPa·s or more, 150 mPa·s or more, 170 mPa·s or more, or 200 mPa·s or more. Such viscosity can be determined by the viscosity test described later. A slippery feeling when applying lotion is more likely to occur when the viscosity of the lotion is high. The polyglycerin fatty acid ester described above, which is incorporated into the cosmetic composition of this disclosure, can maintain a certain viscosity without lowering the viscosity of the lotion. In other words, the polyglycerin fatty acid ester of this disclosure can exhibit the ability to reduce the slippery feeling even when the cosmetic composition does not contain 1.0% by mass or more of oil and when the viscosity is such that slipperiness is generally likely to occur.

[0051] 《Method of manufacturing cosmetics》 There are no particular restrictions on the method for manufacturing the cosmetic composition described herein, and any known manufacturing method used in the field of cosmetics may be employed.

[0052] For example, the cosmetic composition of this disclosure can be obtained by mixing water containing a water-soluble agent and a thickener, and then further mixing in the polyglycerin fatty acid ester described above.

[0053] Cosmetic formulations There are no particular restrictions on the dosage form of the cosmetic composition disclosed herein, and examples include liquid, emulsion, spray, and mousse. Herein, "spray" in this disclosure can include mist-type sprays, aerosol-type sprays, and the like.

[0054] Uses of cosmetics The cosmetic composition of this disclosure can be used, for example, as a cosmetic composition that is spread and applied to the skin or hair.

[0055] The cosmetic products described herein are not limited in any particular form, but examples include facial cosmetics such as lotions, serums, emulsions, and masks; makeup cosmetics such as foundations, lipsticks, and eyeshadows; sunscreens; body cosmetics; hair cosmetics such as hair liquids, hair tonics, hair conditioners, shampoos, rinses, and hair growth products; and ointments. [Examples]

[0056] The cosmetic compositions of this disclosure will be described in more detail below with reference to examples, but the cosmetic compositions of this disclosure are not limited to these. Unless otherwise specified, the amounts of each ingredient are expressed in mass percent. Furthermore, the various evaluation methods described in the examples can be applied not only to the cosmetic compositions described in the examples, but also to cosmetic compositions containing the above-mentioned ingredients.

[0057] Examples 1-9 and Comparative Examples 1-5 The cosmetics obtained using the formulations shown in Table 1 and the manufacturing methods described below were evaluated as follows, and the results are shown in Table 1. The concentrations of the ingredients (e.g., surfactants, thickeners) in all cosmetics in Table 1 were set to concentrations that did not cause a film-like feeling after application. In Table 1, a cosmetic containing a specific polyglycerin fatty acid ester but without a thickener was used as the control cosmetic.

[0058] <Evaluation Method> (Contact angle test) A polymethyl methacrylate substrate (SPF MASTER PA-01, manufactured by Shiseido Medical & Chemical Technology Co., Ltd.) had V-shaped grooves approximately 300 μm wide and 80 μm deep, and a surface roughness of approximately 3 μm. One drop of cosmetic material in 2 μL was dropped onto the substrate, and the static contact angle after 3 seconds was measured using an automatic contact angle meter DM-501 manufactured by Kyowa Interface Science Co., Ltd. The surface tension values ​​listed in the table are the average values ​​obtained from 5 measurements.

[0059] (Evaluation test of slipperiness) Five expert evaluators checked for any slipperiness during the application of the cosmetic product. Specifically, they took approximately 1g of the cosmetic product with their finger and applied it to their face, checking for any slipperiness during application. Slipperiness was evaluated according to the following criteria. Here, A and B ratings are considered pass, and C rating is considered fail: A: All five respondents answered that they did not feel any slipperiness, similar to the control product. B: One or two out of five respondents reported feeling that the cosmetic product had a more slippery texture than the control product. C: 3 to 5 out of 5 respondents said they felt the product had a more slippery feel than the control product.

[0060] (Viscosity test) Using a Type B viscometer (VISCOMETER TVB-15M, manufactured by Toki Sangyo Co., Ltd.), the viscosity of the cosmetic immediately after preparation was evaluated under the conditions of rotor number 2, 30±1℃, and a rotation speed of 60 rpm for 1 minute.

[0061] (Stability test) A transparent glass container with a lid, approximately 3 cm in diameter and 10 cm in height, was filled with the cosmetic product. After leaving this container in a low-temperature atmosphere of 5°C for 4 weeks, the presence or absence of phase separation was evaluated as follows: A: No phase separation. B: Slight phase separation is observed. Compared to the C:B rating, phase separation is significantly more pronounced.

[0062] <Method of manufacturing cosmetics> Mixture A was prepared by mixing water with water-soluble components other than the surfactant in the formulations shown in Table 1, and the surfactant was added to this mixture A to produce the cosmetic. In cases where oil and oil-soluble components other than the surfactant were listed in the formulations shown in Table 1, these were mixed with the surfactant and added to mixture A to produce the cosmetic.

[0063] [Table 1]

[0064] <result> As can be seen from the results of Examples 1-5 and Comparative Examples 1-3, it was confirmed that when a specific polyglycerin fatty acid ester is used in combination with a thickening agent, a reduction in slipperiness can be obtained even if there is no oil or only a small amount of oil.

[0065] As can be seen from the results of Examples 1, 4, and 5, it was confirmed that reducing the amount of oil not only reduces slipperiness but also improves stability.

[0066] As can be seen from the results of Examples 6-9 and Comparative Examples 4-5, it was confirmed that even when using thickeners other than carbomer, the combined use of specific polyglycerin fatty acid esters can reduce the slipperiness.

Claims

1. It contains a polyglycerol fatty acid ester with an OH / C ratio of 0.20 to 0.80, and a thickening agent, and The oil content is less than 1.0% by mass. Cosmetics.

2. The cosmetic composition according to claim 1, wherein the number of carbon atoms in the fatty acid portion of the polyglycerin fatty acid ester is 10 or more and 17 or less.

3. The cosmetic composition according to claim 1 or 2, wherein the polyglycerin portion of the polyglycerin fatty acid ester is formed of polyglycerin in dimers or decapers or less.

4. The cosmetic composition according to claim 1, wherein the polyglycerin fatty acid ester is polyglyceryl-6 laurate.

5. The cosmetic composition according to claim 1 or 2, wherein the content of the polyglycerin fatty acid ester is 0.10% by mass or more.

6. The cosmetic composition according to claim 1 or 2, wherein the thickening agent comprises at least one selected from the group consisting of carbomer, xanthan gum, cellulose gum, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, and (PEG-240 / decyltetradeceth-20 / HDI) copolymer.

7. The cosmetic composition according to claim 1 or 2, wherein the content of the thickening agent is 0.30% by mass or less.

8. The cosmetic composition according to claim 1 or 2, wherein the contact angle of the cosmetic composition with respect to the polymethyl methacrylate substrate is 30.0° or more and 44.0° or less.

9. The cosmetic composition according to claim 1 or 2, wherein the viscosity is 1,000 mPa·s or less.

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