Oil-in-water emulsion cosmetic

Abstract

To provide an oil-in-water emulsion cosmetic that suppresses the deterioration of usability that may occur due to the effects of emulsifiers. [Solution] The oil-in-water emulsion cosmetic contains (A) polyoxyethylene hydrogenated castor oil, (B) 0.05% to 1.5% by mass of plant-based wax, and (C) 2% to 15% by mass of oil that is liquid or semi-solid at room temperature.

Description

[Technical Field]

[0001] This disclosure relates to an oil-in-water emulsion cosmetic. [Background technology]

[0002] Patent Document 1 describes that by combining and blending a predetermined number of waxes in predetermined proportions, an oil-in-water emulsion skin cosmetic can be obtained that provides excellent firmness to the skin, is non-greasy, and has excellent stability. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2010-270078 [Overview of the project] [Problems that the invention aims to solve]

[0004] In oil-in-water emulsion cosmetics, polyoxyethylene hydrogenated castor oil, a nonionic surfactant, is often used as an emulsifier. It is known that using polyoxyethylene hydrogenated castor oil provides high emulsification stability regardless of the viscosity of the cosmetic. However, formulations containing polyoxyethylene hydrogenated castor oil tend to have a reduced feel, for example, a stronger oily sensation during application.

[0005] One aspect of this disclosure aims to provide an oil-in-water emulsion cosmetic that suppresses the deterioration of usability that may occur due to the effects of emulsifiers. [Means for solving the problem]

[0006] One aspect of the present disclosure is an oil-in-water emulsion cosmetic containing (A) polyoxyethylene hydrogenated castor oil, (B) 0.05% to 1.5% by mass of a plant-based wax, and (C) 2% to 15% by mass of an oil that is liquid or semi-solid at room temperature. [Effects of the Invention]

[0007] According to one aspect of this disclosure, it is possible to provide an oil-in-water emulsion cosmetic that suppresses the deterioration of usability that may occur due to the effect of emulsifiers. [Modes for carrying out the invention]

[0008] <Oil-in-water emulsion cosmetic> One embodiment of the present disclosure is an oil-in-water emulsion cosmetic, that is, a cosmetic in the form of an oil-in-water (O / W) emulsion in which an aqueous phase and an oil phase are emulsified with an emulsifier. In this specification, "cosmetic" means a skin application agent used by application to the skin (including the scalp), and may be used particularly by application to the skin of the face. "Cosmetic" may include cosmetics, pharmaceuticals, and quasi-drugs. The oil-in-water emulsion cosmetic according to this embodiment may be a skincare cosmetic (basic cosmetic) or a makeup cosmetic. Furthermore, the form of the oil-in-water emulsion cosmetic is not particularly limited, but it may be provided in forms such as lotions, emulsions, creams, gels, serums, etc., and is preferably provided as an emulsion.

[0009] Generally, polyoxyethylene hydrogenated castor oil, a nonionic surfactant, is known as an excellent emulsifier used in oil-in-water emulsion cosmetics. Using polyoxyethylene hydrogenated castor oil offers advantages such as high emulsification stability even when the oil-in-water emulsion cosmetic is prepared to a low viscosity. However, it has been pointed out that some users are concerned about the feel of oil-in-water emulsion cosmetics containing polyoxyethylene hydrogenated castor oil, for example, the oily feeling during application. If the oiliness during application is too strong, users may feel that the cosmetic is simply sliding on the skin's surface and not penetrating deeply. In contrast, an oil-in-water emulsion cosmetic composition according to one embodiment of the present disclosure contains (A) polyoxyethylene hydrogenated castor oil (hereinafter also simply referred to as "component (A)"), (B) plant-based wax in an amount of 0.05% to 1.5% by mass (hereinafter also simply referred to as "component (B)"), and (C) an oil that is liquid or semi-solid at room temperature in an amount of 2% to 15% by mass (hereinafter also simply referred to as "component (C)"). The inventors have found that by combining these predetermined components, it is possible to suppress the oiliness during application that may occur due to the influence of polyoxyethylene hydrogenated castor oil (improve the oiliness during application). The mechanism is not clear, but it is thought that the oils of component (B) and component (C) influence each other due to the inclusion of a predetermined amount of (B) plant-based wax, thereby creating a good tactile feel. Furthermore, we found that the combination of the above ingredients can also improve other aspects of the feel of the oil-in-water emulsion cosmetic, such as improving the feeling of plumpness and / or firmness of the skin, as well as improving the lack of stickiness and tackiness after application.

[0010] In this specification, "feeling of use" may include either or both the feeling of use after application and the feeling of use during application. Furthermore, "feeling of use during application" refers to the feeling felt by the skin and / or fingers while spreading the cosmetic onto the skin by moving the fingers, and "feeling of use after application" may refer to the feeling felt by the skin and / or fingers that have touched the skin after the application of the cosmetic has been completed.

[0011] The viscosity of the oil-in-water emulsion cosmetic is preferably 1,000 mPa·s to 10,000 mPa·s, more preferably 3,000 mPa·s to 8,000 mPa·s. Oil-in-water emulsion cosmetics having a viscosity in the above range are generally known to be difficult to maintain their emulsion state. However, the oil-in-water emulsion cosmetic according to this disclosure, having a composition containing component (A), component (B), and component (C), can maintain a stable oil-in-water emulsion state even with a viscosity in the above range, and has the excellent feel described above. The viscosity can be measured by the method described in the examples.

[0012] <Ingredient (A): Polyoxyethylene hydrogenated castor oil> The oil-in-water emulsion cosmetic according to this embodiment contains (A) polyoxyethylene hydrogenated castor oil (also known as polyoxyethylene hydrogenated castor oil) as an emulsifier. As described above, by incorporating (A) polyoxyethylene hydrogenated castor oil, even when preparing an oil-in-water emulsion cosmetic with low viscosity, high emulsification stability can be obtained compared to cases where other emulsifiers or nonionic surfactants are incorporated. That is, the emulsified state of the aqueous phase and the oil phase can be maintained for a long period of time. Furthermore, the inclusion of (A) polyoxyethylene hydrogenated castor oil can also improve the feel of the oil-in-water emulsion cosmetic, such as its freshness and moisturizing properties.

[0013] (A) The average number of moles of ethylene oxide added to polyoxyethylene hydrogenated castor oil is preferably 20 to 100, more preferably 30 to 80, in terms of providing high emulsification stability and improving the feel of use such as moisturizing. Also, the HLB of (A) polyoxyethylene hydrogenated castor oil is preferably 10 to 17, more preferably 12 to 15, in terms of providing high emulsification stability and improving the feel of use such as moisturizing.

[0014] (A) Specific examples of polyoxyethylene hydrogenated castor oil include PEG-20 hydrogenated castor oil, PEG-25 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-80 hydrogenated castor oil, and PEG-100 hydrogenated castor oil. Of these, PEG-40 hydrogenated castor oil and PEG-60 hydrogenated castor oil are preferred in that they provide high emulsification stability and can improve the feel of use, such as moisturizing and refreshing properties. Furthermore, PEG-60 hydrogenated castor oil is preferred in that it can improve the feel of use related to skin texture improvement, such as a plump and firm feeling after application.

[0015] The content of (A) polyoxyethylene hydrogenated castor oil relative to the total amount of the oil-in-water emulsion cosmetic is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 3% by mass or less, and even more preferably 0.1% by mass or more and 1.5% by mass or less. By setting the content of (A) polyoxyethylene hydrogenated castor oil within the above range, high emulsification stability can be obtained, as well as improvements in moisturizing and freshness, and the above-mentioned feel of use (such as not being oily during application) obtained by the combination of components (A) to (C) can be maintained.

[0016] <Ingredients (B): Plant-based wax> (B) Plant-based waxes are not particularly limited as long as they are waxes derived from plants. (B) Specific examples of plant-based waxes include carnauba wax and candelilla wax. Of these, carnauba wax is preferred in that it can improve the feel of use related to improving skin texture, such as a plump and firm feeling after application. Candelilla wax is also preferred in that it can improve the lack of squeaky feeling after application.

[0017] Furthermore, the melting point of (B) the plant-based wax may preferably be 60°C or higher, more preferably 75°C or higher.

[0018] The content of (B) plant wax with respect to the total amount of the oil-in-water type emulsified cosmetic is preferably 0.05% by mass or more and 1.5% by mass or less, more preferably 0.08% by mass or more and 1% by mass or less, and still more preferably 0.1% by mass or more and 0.5% by mass or less. By setting the content of (B) plant wax to 0.05% by mass or more, the greasiness during application can be improved. Furthermore, the non-scratchiness after application, the non-stickiness after application, etc. can be improved, and the usability related to improving the skin texture such as the plump firmness after application can be improved. Also, by setting the content of (B) plant wax to 1.5% by mass or less, it is possible to suppress the possibility of stickiness due to an excessive amount of wax.

[0019] In the present embodiment, the value (Wa / Wb) of the ratio of the content Wa of (A) polyoxyethylene hydrogenated castor oil to the content Wb of (B) plant wax may preferably be 0.5 or more and 10 or less, more preferably 1 or more and 5 or less. By setting the value (Wa / Wb) of the ratio of the content Wa of component (A) to the content Wb of component (B) within the above range, high emulsion stability can be maintained, and the usability such as the greasiness during application can be improved.

[0020] <Component (C): Oil that is liquid or semi-solid at room temperature> In this specification, "liquid or semi-solid" refers to a state that is liquid at normal temperature (25°C), or is not liquid but has fluidity and can easily change its shape by gravity. For example, it may be an oil having a melting point of 55°C or lower, preferably 50°C or lower.

[0021] Examples of (C) oil that is liquid or semi-solid at room temperature include hydrocarbon oils, silicone oils, synthetic ester oils (also simply referred to as ester oils), liquid fats and oils, and the like.

[0022] The hydrocarbon oil may be, for example, one kind of aliphatic saturated hydrocarbon having 15 to 35 carbon atoms, or an oil containing two or more kinds of the aliphatic saturated hydrocarbons. Specific examples of the hydrocarbon oil include hydrogenated polydecene, kerosene, liquid paraffin, squalene, squalane, light isoparaffin, normal hexane, isohexane, and the like.

[0023] Specific examples of silicone oils include dimethicone (dimethylpolysiloxane), diphenyldimethicone, methicone, methyltrimethicone, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, phenylmethicone, phenyldimethicone, phenyltrimethicone, diphenyldimethicone, diphenylsiloxyphenyltrimethicone, and trimethylpentaphenyltrisiloxane. Among silicone oils, those containing a phenyl group are preferred due to their high moisturizing properties.

[0024] Specific examples of synthetic ester oils include pentaerythrityl tetraethylhexanoate (pentaerythrityl tetra-2-ethylhexanoate), cetyl octanoate, myristyl myristate, glyceryl tri-2-ethylhexanoate, dioctyl succinate, tripropylene glycol dieopentanoate, diisopropyl sebacate, and diethylhexyl succinate.

[0025] Specific examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, peach kernel 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, shea butter, and triglycerin.

[0026] In addition to the above, other liquid or semi-solid oils at room temperature can also be used, such as liquid higher fatty acids like oleic acid and isostearic acid, and liquid higher alcohols like oleyl alcohol.

[0027] The above (C) liquid or semi-solid oils at room temperature may be used individually or in combination of two or more types.

[0028] The content of (C) liquid or semi-solid oil at room temperature relative to the total amount of the oil-in-water emulsion cosmetic is preferably 2% by mass or more and 15% by mass or less, more preferably 3% by mass or more and 10% by mass or less, and even more preferably 4% by mass or more and 8% by mass or less. By setting the content of (C) liquid or semi-solid oil at room temperature to 2% by mass or more, the feel of use, such as moisturizing effect and lack of stickiness after application, can be improved. Furthermore, by setting the content of (C) liquid or semi-solid oil at room temperature to 15% by mass or less, the emulsion state of the oil-in-water type can be stabilized, the oiliness during application can be improved, and the plump and firm feeling after application can be improved.

[0029] In this embodiment, the ratio of the content of (C) liquid or semi-solid oil at room temperature to the content of (B) plant-based wax (Wb) (Wc / Wb) is preferably 5 to 70, more preferably 10 to 50, and even more preferably 20 to 40. By setting the ratio of the content of component (C) to the content of component (B) (Wb) (Wc / Wb) within the above range, improvements in usability, particularly the absence of oiliness during application and the absence of squeaky feeling after application, can be achieved.

[0030] <Ingredient (D)> Furthermore, the oil-in-water emulsion cosmetic composition according to this embodiment preferably further contains a predetermined polysaccharide as component (D). The predetermined polysaccharide is preferably capable of forming a non-crosslinked hydrogel. In this specification, a component "capable of forming a non-crosslinked hydrogel" means a component that can form a network structure while incorporating water molecules through a thermal structural change (sol-gel transition) caused by a chemical reaction.

[0031] The inventors have found that by including component (D) in addition to the above-mentioned components (A) to (C), the feel of the cosmetic can be further improved. Specifically, the oiliness during application can be further suppressed (the non-oily feeling can be further improved), the freshness during application can be improved, and the squeaky feeling after application can be further reduced (the non-squeaky feeling can be further improved). This is thought to be because the inclusion of component (D) creates a hydrogel formed by component (D) appropriately absorbing moisture, which reduces the oily feel inherent in the fluid oil.

[0032] The specified polysaccharides mentioned above may be natural or synthetic polysaccharides. If natural, they may be, for example, red algae polysaccharides. They may also contain neutral polysaccharides, and it is preferable that they contain both neutral and anionic polysaccharides. Specific examples include agar, agarose, xanthan gum, gellan gum, and tamarind gum. If component (D) contains agar, preferably agar, the effect of improving the user experience described above is enhanced.

[0033] The content of component (D) may be preferably 0.1% to 0.8% by mass, more preferably 0.15% to 0.5% by mass, and even more preferably 0.2% to 0.4% by mass, based on the total amount of the oil-in-water emulsion cosmetic. By setting the content of component (D) to 0.1% by mass or more, the tactile sensation felt during use can be further improved. Specifically, oiliness during application can be further suppressed, a fresh feeling during application can be obtained, and the lack of stickiness after application can also be improved. By setting the content of component (D) to 0.8% by mass or less, the viscosity of the resulting oil-in-water emulsion cosmetic can be prevented from becoming excessively high, and a viscosity suitable for application can be achieved. Furthermore, by setting the content of component (D) to 0.1% to 0.5% by mass, in addition to the above-mentioned effects of component (D), stickiness after application can be suppressed, and a lasting firmness can be given to the skin after application.

[0034] The ratio of the content of component (D) Wd to the content of component (B) Wb (Wd / Wb) is preferably 0.5 to 5, more preferably 1 to 3. By setting the ratio of the content of component (D) Wd to the content of component (B) Wb (Wd / Wb) within the above range, the feel of use can be improved. In particular, oiliness during application can be further suppressed, a fresh feeling during application can be obtained, and the lack of stickiness after application can be improved.

[0035] <Water> The water contained in the oil-in-water emulsion cosmetic according to this embodiment can be purified water, deionized water, tap water, etc. The water content is preferably 50% to 95% by mass, more preferably 70% to 90% by mass, based on the total amount of the oil-in-water emulsion cosmetic. By including water in the above range, the oil-in-water emulsion state can be well maintained.

[0036] <Other ingredients> The oil-in-water emulsion cosmetic composition according to this embodiment may further contain components other than the above-mentioned components (A) to (D) and water, to the extent that they do not interfere with the effects of the present disclosure described above. The other components can be appropriately selected from known components used in cosmetics, and examples include surfactants other than component (A), waxes other than component (B), oils other than component (C), water-soluble alcohols, water-soluble polymers, preservatives, pH adjusters, antioxidants, metal ion chelating agents, powder components, pigments, dyes, UV absorbers, and other additives. These may be used individually or in combination of two or more.

[0037] The surfactant other than component (A) may be a nonionic surfactant, an amphoteric surfactant, an anionic surfactant, or a cationic surfactant.

[0038] Nonionic surfactants other than component (A) may be lipophilic or hydrophilic nonionic surfactants. Examples of nonionic surfactants other than component (A) include polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, fatty acid polyoxyethylene glyceryl, and sorbitan fatty acid esters. Specific examples include beheneth-20 and PEG-20 glyceryl isostearate.

[0039] The oil-in-water emulsion cosmetic composition according to this embodiment may contain waxes other than component (B), i.e., non-natural waxes such as petroleum-based waxes and synthetic waxes, but it is preferable that it substantially contains no non-natural waxes in order to maintain emulsification stability. Furthermore, it is preferable that the oil-in-water emulsion cosmetic composition substantially contains no non-plant-based waxes (including natural waxes other than plant-based waxes). In this specification, "substantially absent" of a predetermined component means that unintentional contamination of the predetermined component is permissible in the raw material acquisition process and / or manufacturing process. Also, when the predetermined component is "substantially absent," the content of the predetermined component may be 0.1% by mass or less, 0.05% by mass or less, or 0.001% by mass or less.

[0040] The oils other than component (C) (excluding waxes) may be solid at room temperature, such as hydrocarbon oils, silicone oils, synthetic ester oils, fats and oils, higher fatty acids, higher alcohols, etc.

[0041] Examples of water-soluble alcohols include lower alcohols, polyhydric alcohols, polyhydric alcohol polymers, alcohol alkyl ethers, alcohol ether esters, glycerin monoalkyl ethers, sugar alcohols, monosaccharides, oligosaccharides, polysaccharides, and their derivatives. Specific examples of lower alcohols include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol. Specific examples of polyhydric alcohols include dihydric alcohols such as dipropylene glycol, 1,3-butylene glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, and octylene glycol; and trihydric alcohols such as glycerin and trimethylolpropane.

[0042] Examples of water-soluble polymers (excluding those included in component (D)) include natural water-soluble polymers, synthetic water-soluble polymers, and semi-synthetic water-soluble polymers, which can be used as thickeners. Oil-in-water emulsion cosmetics preferably contain synthetic water-soluble polymers. Examples of synthetic water-soluble polymers include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer (carbomer); polyoxyethylene polymers such as polyethylene glycol (molecular weight 1500, 4000, 6000); polyoxyethylene polyoxypropylene copolymer polymers; acrylic polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, and acrylic acid / alkyl methacrylate copolymer (e.g., (acrylates / alkyl acrylate (C10-30)) crosspolymer); polyethyleneimine, cationic polymers, etc.

[0043] Examples of preservatives include phenoxyethanol, benzoic acid, salicylic acid, parahydroxybenzoic acid esters (methylparaben, ethylparaben, butylparaben, etc.), sorbic acid, parachlormethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, and photosensitizers.

[0044] Examples of pH adjusters include potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, lactic acid, sodium lactate, citric acid, sodium citrate, glycolic acid, succinic acid, sodium succinate, tartaric acid, malic acid, sodium bicarbonate, and ammonium bicarbonate.

[0045] Examples of powder components include mica, talc, kaolin, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, thiamite, synthetic mica, calcium carbonate, magnesium carbonate, anhydrous silicic acid (silica), aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, aluminum oxide, barium sulfate, red iron oxide, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, Prussian blue, titanium dioxide, zinc oxide, titanium mica (titanium dioxide coated mica), fish scale foil, bismuth oxychloride, boron nitride, Red No. 28, Red No. 226, Blue No. 404, polyethylene powder, polymethyl methacrylate powder, polyamide resin powder (nylon powder), cellulose powder, organopolysiloxane elastomer, aluminum powder, copper powder, etc.

[0046] Furthermore, oil-in-water emulsion cosmetics may contain agents such as vitamins, anti-inflammatory agents, whitening agents, chelating agents, various extracts, activators, blood circulation promoters, anti-seborrheic agents, anti-inflammatory agents, aromatic alcohols, moisturizers, cooling agents, amino acids, bactericides, phospholipids, lecithin, lysolecithin, and ceramides. [Examples]

[0047] Oil-in-water emulsion samples (lotion-like) were prepared by blending each component to the composition and content shown in Tables 1 and 2. The usability of each sample obtained was evaluated, and the viscosity was also measured.

[0048] Note that the units for the content of each component in Tables 1 and 2 are in mass percent. Carbomer was added in the form of a 1 mass percent aqueous solution so that the carbomer content in the sample matched the indicated mass percent. Potassium hydroxide was added in the form of a 10% aqueous solution so that the potassium hydroxide content in the sample matched the indicated mass percent.

[0049] [Table 1] ( * 1) Carbomer: Carbopol (registered trademark) (manufactured by Lubrizol), ( * 2) PEG-60 Hydrogenated Castor Oil: NIKKOL® HCO-60 (Manufactured by Nikko Chemicals Co., Ltd.) ( * 3) Behenez-20: NIKKOL BB-20 (manufactured by Nikko Chemicals Co., Ltd.) ( * 4) PEG-20 Glyceryl Isostearate: Emarex GWIS-120 (manufactured by Nippon Emulsion Co., Ltd.)

[0050] [Table 2] ( * 5) PEG-40 hydrogenated castor oil: NIKKOL HCO-40 (manufactured by Nikko Chemicals Co., Ltd.) ( * 6) PPG-13 Decyltetradeceth-24: Essafe 1324(D) (Manufactured by NOF Corporation) ( * 7) Diphenylsiloxyphenyl trimethicone: KF56 (manufactured by Shin-Etsu Chemical Co., Ltd.) ( * 8) Pentaerythrityl tetraethylhexanoate: RA-PE-408 (manufactured by Nippon Seika Co., Ltd.) (* 9) Microcrystalline wax: Paramix MCW-P (manufactured by Nikko Rica Co., Ltd.) ( * 10) Agar: Kanten CS110 (manufactured by Ina Foods Industry Co., Ltd.)

[0051] <Measurement of viscosity> The viscosity (unit: mPa·s) of the samples of each example was measured at 30°C using a ViscoQC 100-L (manufactured by Anton Paar) B-type viscometer, with rotor No. 3 and at 12 rpm. The results are shown in Table 1 and Table 2.

[0052] <Evaluation of usability> Ten professional panelists applied the samples of each example to the skin with their fingers and evaluated the usability during and after application. The evaluated usability items were "greasiness during application", "freshness during application", "plump firmness after application", "absence of creaking after application", and "non-stickiness after application". In addition, the "persistence of plump firmness after application" was regarded as the usability regarding the degree of the state of being plump and firm felt 10 minutes after application.

[0053] Table 1 shows the evaluation results of usability for the items of "greasiness during application", "absence of creaking after application", "plump firmness after application", and "non-stickiness after application". Table 2 also shows the evaluation results for the item of "freshness during application" in addition to the items evaluated in Table 1.

[0054] The evaluation was conducted by determining the difference in the feel of each sample compared to the feel of the control example (Example 1-0). The evaluation included "single-use comparisons," where each sample was used only once, i.e., at a different time than the control example sample was used, and "simultaneous comparisons," where each sample and the control example sample were used and compared at the same time. More specifically, simultaneous comparisons involved taking two samples simultaneously in the left and right hands, applying them to the left cheek with the left hand and the right cheek with the right hand, and comparing the feel. It should be noted that subtle differences that were not perceived in single-use evaluations are more easily noticed in simultaneous comparisons. Therefore, single-use comparisons were performed first, and simultaneous comparisons were performed for samples where no difference was perceived in the single-use comparison. Each expert panelist assigned a score to each sample according to the following criteria. The arithmetic mean of the scores from all expert panelists was then used as the final evaluation result for each sample. =Evaluation Criteria= 2.0: I noticed a clear difference in a single-test comparison. 1.5: No difference was observed in single-test comparisons, but a significant difference was observed in simultaneous comparisons. 1.0: No difference was observed in single-test comparisons, but a difference was observed in simultaneous comparisons. 0.5: No difference was observed in single-test comparisons, but a slight difference was noticed in simultaneous comparisons. 0: No difference was observed in either single-test or simultaneous comparisons. In the scoring system, a "+" indicates a positive difference compared to the control example for that evaluation item, while a "-" indicates a negative difference compared to the control example for that evaluation item.

[0055] Table 1 shows that, for example, by adding plant-based wax (component (B)) in addition to polyoxyethylene hydrogenated castor oil (component (A)) and oils that are liquid or semi-solid at room temperature (component (C)), the "lack of oiliness during application" is improved (Examples 1-1 to 1-4), and that this effect is maintained even if the amount of oils that are liquid or semi-solid at room temperature (component (C)) is increased to some extent. Furthermore, it was confirmed that the addition of plant-based wax (component (B)) tends to improve "lack of stiffness after application," "plumpness and firmness after application," and "lack of stickiness after application."

[0056] Table 2 shows that adding a specified polysaccharide (Component (D)) to polyoxyethylene hydrogenated castor oil (Component (A)), plant-based wax (Component (B)), and oils that are liquid or semi-solid at room temperature (Component (C)) improves the "moisture during application" and "lack of stiffness after application" (Examples 2-5 and 2-6). It was also found that the "lack of oiliness during application" can be further improved by setting the content of the specified polysaccharide (Component (D)) within a specified range (Example 2-5).

[0057] Although the present disclosure has been described above based on specific embodiments and examples, these embodiments and examples are merely presented as examples, and the present disclosure is not limited to the above embodiments and examples. Various changes, modifications, substitutions, deletions, additions, and combinations are possible within the scope of the present disclosure.

Claims

1. (A) Polyoxyethylene hydrogenated castor oil and (B) Plant-based waxes: 0.05% by mass or more and 1.5% by mass or less, (C) Oils that are liquid or semi-solid at room temperature, in an amount of 2% to 15% by mass, An oil-in-water emulsion cosmetic containing the following ingredients.

2. The oil-in-water emulsion cosmetic composition according to claim 1, further comprising agar.

3. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein component (B) is at least one of carnauba wax and candelilla wax.

4. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein the component (C) comprises one or more selected from the group consisting of hydrocarbon oils, silicone oils, and ester oils.

5. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein the average number of moles of ethylene oxide added to component (A) is 20 or more and 100 or less.

6. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein the content of component (C) is 4% by mass or more and 8% by mass or less.

7. The oil-in-water emulsion cosmetic composition according to claim 2, wherein the agar content is 0.1% by mass or more and 0.8% by mass or less.

8. An oil-in-water emulsion cosmetic composition according to claim 1 or 2, which substantially does not contain non-plant-based waxes.

9. An oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein the viscosity is 1,000 mPa·s or more and 10,000 mPa·s or less.

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