lotion

Abstract

To provide a lotion that enables improvement in temporal stability of oil droplets and enhancement of moisturizing effect after use.SOLUTION: A lotion includes (A) one or more selected from the group consisting of polyglyceryl laurate with an HLB of 12-16, polyglyceryl stearate with an HLB of 11-14, and polyglyceryl isostearate with an HLB of 11-14; (B) hydrogenated lecithin; (C) an oily component; and (D) water. The lotion preferably also includes (E) polyoxyethylene hardened castor oil with an HLB of 11-15 and (F) an alkyl glucoside.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lotion, specifically a cloudy lotion (emulsion cosmetic), and particularly to a lotion in which the stability of oil droplets over time is improved and further the moisturizing properties after use are improved. [Background technology]

[0002] Cosmetics have traditionally contained a wide variety of aqueous and oily ingredients to moisturize the skin and replenish moisture and oil. However, water and oil have a large difference in surface tension, which causes them to separate and not mix. Therefore, various methods have been investigated for mixing aqueous and oily ingredients.

[0003] As an example of such a method, Patent Document 1 discloses an emulsion cosmetic comprising (A) a polyhydric alcohol, (B) a gemini surfactant, (C) a non-gemini nonionic surfactant, (D) an oily component, and (E) water, with the aim of providing an emulsion cosmetic that is stable and feels good after application. Patent Document 2 also discloses a nonaqueous emulsion composition comprising more than 0% to less than 2.3% by weight of sterols, more than 0% to 13% by weight of lecithin or a lecithin derivative, a polyglycerol fatty acid ester comprising 20% ​​to 40% by weight of a fatty acid consisting of an unsaturated fatty acid or a branched fatty acid and a polyglycerol, a trihydric or higher polyhydric alcohol, and a nonpolar oil, with the aim of providing a low-cost, highly safe nonaqueous emulsion composition in which sterols are stably blended without the application of strong external mechanical force.

[0004] Furthermore, Patent Document 3 discloses a vesicle dispersion containing (A) water, (B) 3% by weight or more of pentylene glycol, (C) 0.55% by weight or more and 0.9% by weight or less of a compound containing lecithin and phytosterols, (D) a functional oil, and (E) polyoxyethylene hydrogenated castor oil or polyglyceryl isostearate, with the aim of providing a vesicle dispersion and a cosmetic containing the vesicle dispersion that are excellent in stability and feel when used, while containing an oily component including a functional oil. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-6818 [Patent Document 2] Patent Publication No. 2021-50177 [Patent Document 3] Japanese Patent Publication No. 2022-127207 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology described in Patent Document 1 has the following limitations: claim 3 states "The emulsified cosmetic according to claim 1 or 2, wherein the (B) gemini surfactant is one or more selected from the group consisting of lecithin and hydrogenated lecithin"; claim 5 states "The (C) non-gemini nonionic surfactant is polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene decyl tetradecyl ether, polyoxyethylene hydrogenated dimer diol, polyglyceryl monostearate, polyglyceryl monoisostearate, monomyristate The emulsified cosmetic preparation according to any one of claims 1 to 4 includes the description that "the polyglyceryl monooleate is one or more selected from the group consisting of decaglyceryl monolaurate, polyglyceryl monolaurate, and polyglyceryl monooleate." However, although the examples include a description of combinations of lecithin with polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene decyl tetradecyl ether, and polyoxyethylene hydrogenated dimer diol, there is no description of a combination of hydrogenated lecithin with fatty acid polyglyceryl, and this combination has not been fully investigated.

[0007] Furthermore, the technology described in Patent Document 2 relates to a transparent cosmetic product using a non-aqueous emulsion, as stated in paragraph

[0032] of the specification, "If opacity or creaminess was observed visually, it was marked as 'X'," and contains cholesterol as an essential ingredient, so its purpose and effects are different from those of the lotion of the present invention.Furthermore, the technology described in Patent Document 3 also has a purpose and effects different from those of the lotion of the present invention, as stated in paragraph

[0033] of the specification and contains phytosterols as an essential ingredient.

[0008] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a lotion which overcomes the above-mentioned problems of the prior art, improves the stability of oil droplets over time, and further improves the moisturizing properties after use. [Means for solving the problem]

[0009] As a result of extensive research into solving the above problems, the present inventors have found that the above object can be achieved by combining a specific surfactant with hydrogenated lecithin, and have thus completed the present invention.

[0010] That is, the lotion of the present invention comprises: (A) one or more selected from the group consisting of polyglyceryl laurate having an HLB of 12 to 16, polyglyceryl stearate having an HLB of 11 to 14, and polyglyceryl isostearate having an HLB of 11 to 14; (B) hydrogenated lecithin; (C) an oily component; (D) water, It is characterized by having:

[0011] Furthermore, the lotion of the present invention preferably contains (E) the polyoxyethylene hydrogenated castor oil having an HLB of 11 to 15, and preferably contains (F) an alkyl glucoside.

[0012] Furthermore, the lotion of the present invention preferably contains (G) a water-swellable clay mineral, and preferably contains (H) a salt of an acylamino acid. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a lotion in which the stability of oil droplets over time is improved and further the moisturizing properties after use are improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a photograph of the lotion of Example 4. [Figure 2] 1 is a graph showing the change in particle size distribution in Example 6. [Figure 3] 10 shows photographs of the lotion of Example 1 after one month of storage under each condition. DETAILED DESCRIPTION OF THE INVENTION

[0015] The lotion of the present invention will be specifically described below. The lotion of the present invention is characterized by comprising (A) one or more selected from the group consisting of polyglyceryl laurate (HLB 12-16), polyglyceryl stearate (HLB 11-14), and polyglyceryl isostearate (HLB 11-14), (B) hydrogenated lecithin, (C) an oily component, and (D) water. This improves the stability of oil droplets over time, providing a lotion with improved moisturizing properties after use. In particular, it provides a milky white lotion with improved stability over time. HLB is an index representing the ratio of the relative affinity of a surfactant to both liquids in an oil-water system, and refers to the HLB value at 25°C as defined by Griffin. Griffin's HLB value is defined in "J. Soc. Cosm. Chem., 1954, 5:249-256."

[0016] The lotion of the present invention preferably contains 0.1 to 3% by mass of the component (A) and 0.1 to 2% by mass of the hydrogenated lecithin (B), and more preferably contains 0.8 to 2.5% by mass of the component (A) and 0.5 to 1.5% by mass of the hydrogenated lecithin (B). The ratio of the amount of the component (A) to the amount of the hydrogenated lecithin (B) is preferably 1:1 to 1:6. Adjusting the amounts and ratios of the components can improve the stability of the oil droplets over time and provide a lotion with improved moisturizing properties after use.

[0017] In the present invention, the polyglyceryl laurate having an HLB value of 12 to 16 is an ester of lauric acid and polyglycerin, and is not particularly limited as long as it satisfies the HLB value, provides the effects of the present invention, and can be used in ordinary cosmetics. For example, polyglyceryl laurates with the cosmetic labeling names polyglyceryl-3 laurate, polyglyceryl-4 laurate, polyglyceryl-5 laurate, polyglyceryl-6 laurate, and polyglyceryl-10 laurate can be used.

[0018] Furthermore, in the present invention, the polyglyceryl stearate having an HLB value of 11 to 14 is an ester of stearic acid and polyglycerin, and is not particularly limited as long as it satisfies the HLB value, provides the effects of the present invention, and can be used in ordinary cosmetics. For example, polyglyceryl stearate with the cosmetic labeling names polyglyceryl-5 stearate, polyglyceryl-6 stearate, polyglyceryl-8 stearate, and polyglyceryl-10 stearate can be used.

[0019] Furthermore, in the present invention, the polyglyceryl isostearate having an HLB value of 11 to 14 is an ester of isostearic acid and polyglycerin, and is not particularly limited as long as it satisfies the HLB value, provides the effects of the present invention, and can be used in ordinary cosmetics. For example, polyglyceryl isostearate having the cosmetic name Polyglyceryl-4 isostearate, Polyglyceryl-5 isostearate, Polyglyceryl-6 isostearate, or Polyglyceryl-10 isostearate can be used.

[0020] In the present invention, the component (A) may be one or more selected from the group consisting of polyglyceryl laurate having an HLB of 12 to 16, polyglyceryl stearate having an HLB of 11 to 14, and polyglyceryl isostearate having an HLB of 11 to 14, and two or more may be used in combination. Among these, the component (A) is preferably one or more selected from the group consisting of polyglyceryl-6 laurate, polyglyceryl-10 stearate, and polyglyceryl-10 isostearate.

[0021] In the present invention, the (B) hydrogenated lecithin is a hydrogenated lecithin, and is not particularly limited as long as it can provide the effects of the present invention and can be used in ordinary cosmetics, but examples of commercially available products that can be used include Basis (registered trademark) LP-20H and Basis (registered trademark) LS-60HR manufactured by The Nisshin Oillio Group, Ltd., and Resinol (registered trademark) S-10 manufactured by Nikko Chemicals Co., Ltd. By using hydrogenated lecithin instead of lecithin, the stability of oil droplets over time is improved, and a lotion with improved moisturizing properties after use can be provided.

[0022] The lotion of the present invention also contains an oily component (C). The oily component (C) is not particularly limited as long as it can provide the effects of the present invention and can be used in ordinary cosmetics, but examples thereof include hydrocarbons such as liquid paraffin (mineral oil), heavy liquid isoparaffin, light liquid isoparaffin, α-olefin oligomer, polyisobutene, hydrogenated polyisobutene, polybutene, squalane, olive-derived squalane, squalene, petrolatum, and solid paraffin; candelilla wax, carnauba wax, rice wax, Japan wax, beeswax, montan wax, ozokerite, ceresin, and para. Waxes such as fin wax, microcrystalline wax, petrolatum, Fischer-Tropsch wax, polyethylene wax, and ethylene-propylene copolymer, 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, and peanut oil. Vegetable oils and fats such as oil, rice bran oil, cocoa butter, shea butter, hydrogenated coconut oil, hydrogenated castor oil, jojoba oil, hydrogenated jojoba oil, etc.; animal oils and fats such as beef tallow, milk fat, horse fat, egg yolk oil, mink oil, turtle oil, etc.; animal waxes such as whale wax, lanolin, orange roughy oil, etc.; liquid lanolin, reduced lanolin, adsorbed and purified lanolin, acetated lanolin, acetated liquid lanolin, hydroxylanolin, polyoxyethylene lanolin, lanolin fatty acids, hard lanolin fatty acids, lanolin alcohol, acetated lanolin alcohol, cetyl lanolyl acetate ester, etc. Sphingophospholipids such as lecithin, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, and sphingomyelin; phospholipids such as phosphatidic acid and lysolecithin; phospholipid derivatives such as hydrogenated soybean phospholipid, partially hydrogenated soybean phospholipid, hydrogenated egg yolk phospholipid, and partially hydrogenated egg yolk phospholipid; sterols such as cholesterol, dihydrocholesterol, lanosterol, dihydrolanosterol, phytosterol, and cholic acid; sapogenins;Saponins, acyl sarcosamines such as cholesteryl acetate, cholesteryl nonanoate, cholesteryl stearate, cholesteryl isostearate, cholesteryl oleate, N-lauroyl-L-glutamic acid di(cholesteryl / behenyl / octyldodecyl), N-lauroyl-L-glutamic acid di(cholesteryl / octyldodecyl), N-lauroyl-L-glutamic acid di(phytosteryl / behenyl / octyldodecyl), N-lauroyl-L-glutamic acid di(phytosteryl / octyldodecyl), and N-lauroylsarcosinate isopropyl Sterol esters such as sucralose alkyl esters, cholesteryl 12-hydroxystearate, cholesteryl macadamiate, phytosteryl macadamiate, phytosteryl isostearate, cholesteryl soft lanolinate, cholesteryl hard lanolinate, cholesteryl long-chain branched fatty acids, cholesteryl long-chain α-hydroxy fatty acids, lipid complexes such as phospholipid-cholesterol complex, phospholipid-phytosterol complex, octyldodecyl myristate, hexyldecyl myristate, octyl isostearate Dodecyl, 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, octyldodecyl oleate, octyldodecyl ricinoleate, octyldodecyl lanolinate, hexyldecyl dimethyloctanoate, octyldodecyl erucate Sil, hydrogenated castor oil isostearate, ethyl oleate, avocado oil fatty acid ethyl, isopropyl myristate, isopropyl palmitate, octyl palmitate, isopropyl isostearate, isopropyl lanolinate, methylheptyl laurate, methylheptyl myristate, methylheptyl palmitate, methylheptyl isostearate, diethyl sebacate, diisopropyl sebacate, dioctyl sebacate, diisopropyl adipate, dibutyloctyl sebacate, diisobutyl adipate, dioctyl succinate,Monoalcohol carboxylic acid esters such as triethyl citrate, cetyl lactate, diisostearyl malate, hydrogenated castor oil monoisostearate, oxyacid esters such as gamma-erucalactone, glyceryl trioctanoate, glyceryl trioleate, glyceryl triisostearate, glyceryl diisostearate, caprylic / capric triglyceride, caprylic / capric / myristic / stearic triglyceride, hydrogenated rosin triglyceride (hydrogenated ester gum), rosin triglyceride (ester gum) ), Glyceryl Eicosandioate, Trimethylolpropane Trioctanoate, Trimethylolpropane Triisostearate, Neopentyl Glycol Dioctanoate, Neopentyl Glycol Dicaprate, 2-Butyl-2-Ethyl-1,3-Propanediol Dioctanoate, Propylene Glycol Dioleate, Pentaerythrityl Tetraoctanoate, Pentaerythrityl Hydrogenated Rosin, Ditrimethylolpropane Triethylhexanoate, Ditrimethylolpropane Isostearate / Sebacic Acid, Triethylhexanoic Acid Pentaerythrityl, Dipentaerythrityl Hydroxystearate / Stearic Acid / Rosinate, Diglyceryl Diisostearate, Polyglyceryl Tetraisostearate, Polyglyceryl-10 Nonisostearate, Polyglyceryl-8 Deca(Erucic Acid / Isostearate / Ricinoleate), Diglyceryl Hexyldecanoate / Sebacic Acid Digoester, Glycol Distearate (Ethylene Glycol Distearate), 3-Methyl-1,5-Pentanediol Dineopentanoate, 2,4-Diethyl Dineopentanoate Polyhydric alcohol fatty acid esters such as 1,5-pentanediol, diisopropyl dimer dilinoleate, diisostearyl dimer dilinoleate, di(isostearyl / phytosteryl) dimer dilinoleate, phytosteryl / behenyl dimer dilinoleate, phytosteryl / isostearyl / cetyl / stearyl / behenyl dimer dilinoleate, dimer dilinoleyl dimer dilinoleate, dimer dilinoleyl diisostearate, dimer dilinoleyl hydrogenated rosin condensate, hydrogenated castor oil dimer dilinoleate,Derivatives of dimer acid or dimer diol such as hydroxyalkyl dimer dilinoleyl ether, higher alcohols such as cetanol, myristyl alcohol, oleyl alcohol, lauryl alcohol, cetostearyl alcohol, stearyl alcohol, arachyl alcohol, behenyl alcohol, jojoba alcohol, chimyl alcohol, selachyl alcohol, batyl alcohol, hexyldecanol, isostearyl alcohol, 2-octyldodecanol, and dimer diol, aralkyl alcohols and derivatives such as benzyl alcohol, lauric acid ... Higher fatty acids such as phosphoric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, undecylenic acid, 12-hydroxystearic acid, palmitoleic acid, oleic acid, linoleic acid, linolenic acid, erucic acid, docosahexaenoic acid, eicosapentaenoic acid, isohexadecanoic acid, anteisohenicosanoic acid, long-chain branched fatty acids, dimer acids, hydrogenated dimer acids, and their aluminum salts, calcium salts, magnesium salts, zinc salts, potassium salts, sodium salts, and other metal soaps, as well as nitrogen-containing derivatives such as amides, coconut oil fatty acid monoethanolate, Fatty acid alkanolamides such as palmitic acid monoethanolamide (palmitic acid MEA), palmitic acid diethanolamide (palmitic acid DEA), coconut oil fatty acid methylethanolamide (cocamide DEA), lauric acid monoethanolamide (lauramide MEA), lauric acid diethanolamide (lauramide DEA), lauric acid monoisopropanolamide (lauramide MIPA), palmitic acid monoethanolamide (palmitic acid MEA), palmitic acid diethanolamide (palmitic acid DEA), coconut oil fatty acid methylethanolamide (cocamide methyl MEA), dimethicone (dimethylpolysiloxane), highly polymerized dimethicone (highly polymerized Dimethylpolysiloxane), cyclomethicone (cyclic dimethylsiloxane, decamethylcyclopentasiloxane), phenyl trimethicone, diphenylsiloxyphenyl trimethicone, diphenyl dimethicone, trimethylsiloxyphenyl dimethicone, trimethylpentaphenyl trisiloxane, (aminoethyl aminopropyl methicone / dimethicone) copolymer, dimethiconol, dimethiconol crosspolymer, silicone resin, silicone rubber, amino-modified silicones such as aminopropyl dimethicone and amodimethicone, cation-modified silicone,Examples of suitable silicones include polyether-modified silicones such as dimethicone copolyol, polyglycerin-modified silicones, sugar-modified silicones, carboxylic acid-modified silicones, phosphate-modified silicones, sulfate-modified silicones, alkyl-modified silicones, fatty acid-modified silicones, alkyl ether-modified silicones, amino acid-modified silicones, peptide-modified silicones, fluorine-modified silicones, cation-modified and polyether-modified silicones, amino-modified and polyether-modified silicones, alkyl-modified and polyether-modified silicones, amidoalkyl-modified silicones, aminoglycol-modified silicones, aminophenyl-modified silicones, and polysiloxane-oxyalkylene copolymers; and fluorine-based oils such as perfluorodecane, perfluorooctane, and perfluoropolyethers. However, in the present invention, the oily component (C) must be liquid at room temperature. Therefore, when blending an oily component that is solid at room temperature, it must be combined with an oily component that is liquid at room temperature to form a liquid oily component at room temperature. Here, "room temperature" refers to the temperature in a typical room (room temperature), e.g., a temperature range of 20 to 30°C.

[0023] The blending amount of the oil component (C) is preferably 0.1 to 25% by mass, more preferably 1 to 20% by mass, and even more preferably 10 to 15% by mass, which further improves the stability of the oil droplets over time and provides a lotion with improved moisturizing properties after use.

[0024] The lotion of the present invention is liquid due to the inclusion of (D) water. The water (D) is not particularly limited as long as it provides the effects of the present invention and is suitable for use in ordinary cosmetics, but purified water, ion-exchanged water, mineral spring water, etc. can be used. Furthermore, the blending amount of (D) water is preferably 65 to 85% by mass, more preferably 70 to 75% by mass.

[0025] Furthermore, the lotion of the present invention preferably contains the polyoxyethylene hydrogenated castor oil having an (E)HLB of 11 to 15. This further improves the stability of the oil droplets over time, and makes it possible to provide a lotion with improved moisturizing properties after use. The polyoxyethylene hydrogenated castor oil with an (E) HLB of 11 to 15 is obtained by addition polymerization of hydrogenated castor oil with ethylene oxide. It is not particularly limited as long as it satisfies the HLB value requirement, provides the effects of the present invention, and is suitable for use in ordinary cosmetics. For example, those labeled as PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-45 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-55 hydrogenated castor oil, PEG-60 hydrogenated castor oil, or PEG-80 hydrogenated castor oil are suitable. Of these, PEG-40 hydrogenated castor oil, PEG-45 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-55 hydrogenated castor oil, and PEG-60 hydrogenated castor oil are preferred. Furthermore, the amount of component (E) blended is preferably 0.01 to 2% by mass, and more preferably 0.1 to 1.5% by mass.

[0026] Furthermore, the lotion of the present invention preferably contains an (F) alkyl glucoside. This further improves the stability of the oil droplets over time, and further improves the moisturizing properties of the lotion after use. The (F) alkyl glucoside is a nonionic surfactant formed by glycosidic bonding between a sugar and a higher alcohol. It is not particularly limited as long as it provides the effects of the present invention and can be used in ordinary cosmetics. For example, those labeled as lauryl glucoside, decyl glucoside, capryl glucoside, myristyl glucoside, or coconut oil alkyl glucoside can be used, with decyl glucoside being preferred. The amount of the (F) alkyl glucoside blended is preferably 0.01 to 2% by mass.

[0027] Furthermore, the lotion of the present invention preferably contains (G) a water-swellable clay mineral. This improves the stability of oil droplets over time, and provides a lotion with improved moisturizing properties after use. The water-swellable clay mineral (G) is a clay mineral that swells with water. It is not particularly limited as long as it can achieve the effects of the present invention and can be used in conventional cosmetics. Examples of suitable clay minerals include bentonite and (Al / Mg) silicate, with bentonite being preferred. Specifically, Sumecton (registered trademark) SA-2, Kunipia (registered trademark) G-4, and Kunipia (registered trademark) F, all manufactured by Kunimine Industries Co., Ltd., can be used. The amount of the water-swellable clay mineral (G) is preferably 0.1 to 2% by mass.

[0028] Furthermore, the lotion of the present invention preferably contains a salt of (H) acylamino acid. This further improves the stability of the oil droplets over time, and provides a lotion with improved moisturizing properties after use. Examples of such salts of (H) acylamino acid include potassium coconut oil fatty acid glutamate, sodium coconut oil fatty acid glutamate, triethanolamine coconut oil fatty acid glutamate, ammonium palm kernel oil fatty acid glutamate, sodium lauroyl glutamate, triethanolamine lauroyl glutamate, potassium coconut oil fatty acid threonine, triethanolamine coconut oil fatty acid threonine, ammonium palm kernel oil fatty acid threonine, sodium coconut oil fatty acid threonine, sodium lauroyl threonine, triethanolamine lauroyl threonine, potassium coconut oil fatty acid glycine, sodium coconut oil fatty acid glycine, palm One or more compounds selected from the group consisting of palm kernel oil fatty acid ammonium glycinate, sodium lauroylglycinate, lauroylglycinate triethanolamine, coconut oil fatty acid serine potassium, coconut oil fatty acid serine triethanolamine, sodium lauroylserine, lauroylserine triethanolamine, palm kernel oil fatty acid ammonium serine, potassium coconut oil fatty aspartate, sodium coconut oil fatty aspartate, coconut oil fatty acid aspartate triethanolamine, palm kernel oil fatty acid aspartate ammonium, sodium lauroyl aspartate, and triethanolamine lauroyl aspartate can be used. The amount of the (H) acylamino acid salt is preferably 0.1 to 2 mass%.

[0029] Furthermore, in the present invention, it is preferable to include one or more selected from the group consisting of polyhydric alcohols and ethanol. The polyhydric alcohol is not particularly limited as long as it achieves the effects of the present invention and is suitable for use in conventional cosmetics. For example, one or more selected from the group consisting of glycerin, 1,3-butylene glycol, propylene glycol, propanediol, 1,2-hexanediol, pentylene glycol, pentaerythritol, hexylene glycol, diglycerin, polyglycerin, diethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, ethylene glycol-propylene glycol copolymer, and polymers thereof can be used. In the present invention, it is particularly preferable to include one or more selected from the group consisting of 1,3-butylene glycol, propanediol, and pentylene glycol, which can further improve stability. Furthermore, the total amount of one or more selected from the group consisting of polyhydric alcohols and ethanol is not limited as long as the effects of the present invention are achieved, but it is preferably 1 to 20% by mass, and more preferably 5 to 10% by mass.

[0030] In the present invention, it is also preferred to contain one or more organic acids selected from the group consisting of citric acid, malic acid, ascorbic acid, ferulic acid, tranexamic acid, oxalic acid, malonic acid, succinic anhydride, glutaric acid, adipic acid, fumaric acid, maleic anhydride, phthalic acid, isophthalic acid, terephthalic acid, and glutamic acid, and alkali metal salts of the organic acids. The composition may contain one or more organic acids selected from the group consisting of citric acid, malic acid, ascorbic acid, ferulic acid, tranexamic acid, oxalic acid, malonic acid, succinic anhydride, glutaric acid, adipic acid, fumaric acid, maleic anhydride, phthalic acid, isophthalic acid, terephthalic acid, and glutamic acid, one or more alkali metal salts of the organic acids, or one or more organic acids and alkali metal salts of the organic acids. Citric acid and sodium citrate are particularly preferred. The amount of the organic acid or alkali metal salt of the organic acid blended is not limited as long as the effects of the present invention are achieved, but is preferably 0.01 to 0.2% by mass, and more preferably 0.05 to 0.1% by mass. If the total amount of the blend is outside the above range, not only in terms of the pH adjustment effect but also in terms of the stability of the oil droplets, this is undesirable.

[0031] In the present invention, a lotion is a cosmetic that can be used on the human body, etc., and falls into the category of ordinary cosmetics, and does not exclude applications as quasi-drugs, pharmaceuticals, etc. Furthermore, the lotion also includes applications as basic cosmetics, makeup cosmetics, hair cosmetics, etc., and is not limited as long as it is liquid, but examples thereof include liquids with a viscosity of 0 to 1000 mP·s as measured with a B-type viscometer.

[0032] Furthermore, in the present invention, other ingredients may be added as appropriate within the range that does not impair the effects of the present invention. Any ingredients other than those described above may be blended within the qualitative and quantitative ranges, and ingredients that are typically blended in cosmetics, such as moisturizers, antioxidants, fragrances, various vitamin preparations, chelating agents, colorants, medicinal ingredients, inorganic salts, ingredients with antiseptic effects, plant extracts, and other useful ingredients, may be blended.

[0033] Examples of extract components include chamomile extract, parsley extract, honeysuckle extract, rice extract, rice bran extract, hop extract, Phellodendron bark extract, Job's tears extract, Swertia japonica extract, Melilot extract, birch extract, licorice extract, peony extract, soapwort extract, loofah extract, chili pepper extract, lemon extract, gentian extract, perilla extract, aloe extract, rosemary extract, sage extract, thyme extract, eucalyptus extract, tea extract, seaweed extract, cucumber extract, clove extract, carrot extract, horse chestnut extract, witch hazel extract, mulberry extract, tangerine peel extract, pecan nut extract, grapefruit extract, Citrus depressa extract, passion fruit extract, loquat extract, grape extract, rose fruit extract, Sophora flavescens extract, and peppermint extract.

[0034] Examples of moisturizing ingredients include xylitol, sorbitol, maltitol, sodium chondroitin sulfate, elastin, glucosamine, hyaluronic acid, cyclodextrin, collagen, and bile salts.

[0035] Examples of medicinal ingredients include vitamins such as vitamin A, vitamin B, vitamin C, vitamin D, and vitamin E and their derivatives, glycyrrhizinic acid and its derivatives, various salts of urea, creatinine, CoQ10, astaxanthin, polyphenols, and ceramides.

[0036] Furthermore, in the present invention, the method for producing the lotion (emulsion cosmetic) is not limited as long as it can produce the lotion of the present invention, but it is preferable to subject the oily component (C) to high-pressure treatment after emulsification. The treatment pressure is not particularly limited, but treatment at 50 MPa to 200 MPa is preferred, and treatment at 80 MPa to 130 MPa is more preferred. Furthermore, the number of treatments is not particularly limited, but treatment at 1 to 5 passes is preferred, and treatment at 1 to 3 passes is more preferred. Treatment with a high-pressure homogenizer after emulsification can make the emulsified particles more uniform and improve emulsion stability. Furthermore, examples of high-pressure homogenizers that can be used include NM2-L100-D (trade name) and NM2-L200-D (trade name) manufactured by Yoshida Kikai Kogyo Co., Ltd.

[0037] Furthermore, in the present invention, methods for evaluating the stability of a lotion include (1) a method for checking the appearance, which involves visually checking the state when the lotion is dispensed from a pump container; (2) a method for checking the stability of the cloudy state, which involves visually checking the cloudiness of the contents; and (3) a method for checking the stability of the cloudy precipitate, which involves visually checking the presence or absence of precipitate in the contents. In addition to visual observation, a method for checking the stability of the cloudy precipitate may also be used, which involves visually checking the brightness (L * a * b * The method can be measured by measuring the L value in a color system, a spectrocolorimeter, a spectrophotometer, or the like, and is not particularly limited as long as it is a method that can measure other ordinary stability.

[0038] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples. Furthermore, the numerical values ​​in the formulations below represent mass %. [Example]

[0039] (Examples 1 to 15, Comparative Examples 1 to 9) The lotions of Examples 1 to 15 and Comparative Examples 1 to 9 were prepared using the blending amounts (contents) shown in Tables 1 to 4 below. The resulting lotions were subjected to the following tests: "Stability Test," "Usage Feeling Test (Moisturizing Feel, Skin Compatibility)," "Appearance Test," and "Average Particle Size Measurement Test," and the results are shown in Tables 1 to 4 below.

[0040] <Stability test> The condition of the obtained lotion was visually observed after one month at room temperature, 50°C, 40°C and 5°C, and evaluated according to the following evaluation criteria. ◎: No separation or creaming Good: No separation, slight creaming △: No separation, but considerable creaminess ×: Separation and creaming occur

[0041] <Usage sensation (moisturizing sensation) test> The subjects were six healthy male and female subjects (three males and three females) aged between 29 and 62 (average age 35) with experience in sensory measurement. Each sample of the obtained lotion was applied to the subject's forearm, and the "feel (moisturizing feel)" was evaluated using the following evaluation criteria, and the average score was used. 5: Very moisturizing 4: Strong moisturizing effect 3: Moisturizing 2: Slightly moisturizing 1: No moisturizing feeling

[0042] <Usability (skin compatibility) test> The subjects were six healthy male and female subjects (three males and three females) aged between 29 and 62 (average age 35) with experience in sensory measurement. Each sample of the obtained lotion was applied to the subject's forearm, and the "feel (moisturizing feel)" was evaluated using the following evaluation criteria, and the average score was used. 5: Absorbs quickly and well into the skin 4: Blends well with the skin 3: Blends well with the skin 2: Blends slightly into the skin 1: Doesn't blend well with the skin

[0043] <Appearance (cloudiness) test> The appearance (cloudiness) of the obtained lotion was visually observed and evaluated according to the following evaluation criteria. 4: Cloudy 3: Slightly bluish cloudy white 2: Translucent milky white 1: Transparent

[0044] <Average particle size measurement test> The obtained lotion was diluted with water to 1% and the mean particle size (MV value) was measured using a nanoparticle property evaluation and measurement device (NANOTRAC WAVE II) manufactured by Microtrac Bell Corporation.

[0045] [Table 1]

[0046] [Table 2]

[0047] [Table 3]

[0048] [Table 4]

[0049] FIG. 1 is a photograph of the lotion of Example 4, and FIG. 2 is a graph showing the change in particle size distribution of Example 6, with the horizontal axis representing particle size (particle diameter (particle size), nm) and the vertical axis representing frequency (%). Table 5 below shows the change in particle size distribution of Example 6. In FIG. 2 and Table 5, A represents the particle size distribution immediately after production, B represents the particle size distribution after two months at room temperature, and C represents the particle size distribution after two months at 40°C. Furthermore, FIG. 3 is a photograph of the lotion of Example 1 after one month of storage under each condition. The storage conditions were room temperature (20°C), cycling (alternating between 5°C and 40°C every other day), 40°C, 5°C, and 50°C.

[0050] [Table 5]

[0051] From the results of Figures 1 to 3 and Tables 1 to 4 and 5, the lotions of Examples 1 to 15 performed well in the "stability test," "usage sensation test (moisturizing sensation, compatibility with skin)," "appearance test," and "average particle size measurement test." In particular, the lotions of Examples 1, 4, 5, and 8 to 10 obtained excellent results. On the other hand, the lotions of Comparative Examples 1 to 6, 8, and 9 separated even at room temperature and had poor stability. Furthermore, Comparative Example 7 had poor stability in accelerated tests at 40°C and 50°C.

Claims

1. (A) one or more selected from the group consisting of polyglyceryl laurate having an HLB of 12 to 16, polyglyceryl stearate having an HLB of 11 to 14, and polyglyceryl isostearate having an HLB of 11 to 14; (B) hydrogenated lecithin; (C) an oily component; (D) water; A lotion characterized by comprising:

2. 2. The lotion according to claim 1, comprising (E) the polyoxyethylene hydrogenated castor oil having an HLB of 11 to 15.

3. The lotion according to claim 1 or 2, which contains (F) an alkyl glucoside.

4. 3. The lotion according to claim 1, further comprising (G) a water-swellable clay mineral.

5. 3. The lotion according to claim 1, further comprising (H) a salt of an acylamino acid.

Images