Water-in-oil emulsion composition

Abstract

To provide a water-in-oil emulsion composition that exhibits excellent temporal emulsion stability, enhances skin moisturizing effect, suppresses sliminess, and offers pleasant feel in use.SOLUTION: A water-in-oil emulsion composition comprises: (A) a hydrocarbon that is liquid or paste-like at 25°C; (B) nicotinamide, (C) a water-swellable clay mineral; and water, wherein, relative to the total mass of the water-in-oil emulsion composition, the content of component (A) is 8 mass% or more and 20 mass% or less, the content of component (B) is 0.0001 mass% or more and 10 mass% or less, the content of component (C) is 0.05 mass% or more and 5 mass% or less, the content of water is 50 mass% or more and 95 mass% or less, and the ratio of the content of component (A) to the total content of component (B) and component (C), (A) / ((B)+(C)), is within the range of 1 to 150.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-in-water emulsion composition. [Background technology]

[0002] Among skin cosmetics, emulsion compositions in particular contain oily components, and the occlusive properties of the oily components make it possible to provide moisture to the skin. Liquid hydrocarbon oils are known to be highly effective in preventing water evaporation, and are known to be very useful components for moisturizing. Furthermore, liquid hydrocarbon oils are incorporated into many cosmetics because they are less likely to oxidize and less irritating than other oily components. On the other hand, a certain amount of liquid hydrocarbon oil is required to fully obtain the effect of preventing water evaporation, and the incorporation of a large amount of liquid hydrocarbon oil increases negative effects such as poor compatibility, stickiness, and other deterioration in the feeling of use, and reduced stability. Therefore, methods are being sought for that can suppress these defects while still providing high moisturizing power.

[0003] In order to improve stability, a method of blending thickeners or dispersion stabilizers is known. For example, acrylic acid-based water-soluble polymers such as carboxyvinyl polymers, water-soluble cellulose (derivatives) such as carboxymethylcellulose salts, and natural polymer polysaccharides such as xanthan gum are often used, but these thickeners often cause stickiness, especially when blended, which leads to a deterioration in the feeling of use. A method of using cellulose nanofibers as shown in Patent Document 1 has been reported as a polymer that has less stickiness specific to water-soluble soluble molecules, but the more oily the product is, the more cellulose nanofibers are required, which results in some stickiness.

[0004] Furthermore, surfactants are generally used to improve stability, but they also have known drawbacks such as leaving a sticky or slimy feeling.

[0005] In addition, there is a method for improving compatibility and stickiness by changing the oily components as shown in Patent Document 2, and it has been reported that the use of unsaturated fatty acids has led to faster compatibility. However, there is a problem in that unsaturated fatty acids are easily oxidized and produce an unpleasant odor over time. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-011287 A [Patent Document 2] Japanese Patent Application Publication No. 05-271046 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, there is a strong demand for an oil-in-water emulsion composition that has excellent emulsion stability over time, enhances the skin moisturizing effect, suppresses stickiness, and provides an excellent feel when used.

[0008] Therefore, the present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an oil-in-water emulsion composition which has excellent emulsion stability over time, enhances the skin moisturizing effect while suppressing stickiness, and provides an excellent feel when used. [Means for solving the problem]

[0009] As a result of intensive research conducted by the present inventors to solve the above problems, it has been discovered that a liquid or paste-like hydrocarbon at 25° C. is combined with nicotinamide, a water-swellable clay mineral, and water. As a result, they have discovered an oil-in-water emulsion composition which has excellent emulsion stability over time, enhances the skin moisturizing effect while suppressing stickiness, and has an excellent feel when used, and have completed the present invention.

[0010] The oil-in-water emulsion composition of the present invention comprises: Contains the following (A) to (C) and water, the content of component (A) is from 8% by mass to 20% by mass, the content of component (B) is from 0.0001% by mass to 10% by mass, the content of component (C) is from 0.05% by mass to 5% by mass, and the content of water is from 50% by mass to 80% by mass, relative to the total mass of the oil-in-water emulsion composition; The ratio of the content of component (A) to the total content of component (B) and component (C) ((A) / ((B)+(C))) is within the range of 1 or more and 150 or less. (A) Hydrocarbons that are liquid or paste-like at 25°C (B) Nicotinamide (C) Water-swellable clay minerals

[0011] Furthermore, the oil-in-water emulsion composition of the present invention may contain the following component (D), and the content of component (D) may be 0.0001% by mass or more and 0.5% by mass or less based on the total mass of the oil-in-water emulsion composition. (D) One or more types selected from the group consisting of water-soluble collagen and hydrolyzed collagen. Effect of the Invention

[0012] According to the present invention, it is possible to provide an oil-in-water emulsion composition which has excellent emulsion stability over time, enhances the skin moisturizing effect while suppressing stickiness, and provides an excellent feel when used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The composition of the present invention is described in detail below. The oil-in-water emulsion composition of the present invention contains the following components: (A) a hydrocarbon that is liquid or pasty at 25° C., (B) nicotinamide, (C) a water-swellable clay mineral, and water.

[0014] <Liquid or pasty hydrocarbons at 25℃> The component (A) used in the oil-in-water emulsion composition according to this embodiment is a liquid or pasty hydrocarbon at 25° C. Examples of the liquid or pasty hydrocarbon at 25° C. include mineral oil, light liquid isoparaffin, liquid isoparaffin, liquid paraffin, liquid polyisobutylene, petrolatum, squalane, and tetradecane. The liquid or pasty hydrocarbon at 25° C. may be derived from either an animal or a plant, and from the viewpoint of texture, mineral oil, liquid paraffin, petrolatum, and squalane are preferred. The liquid or pasty hydrocarbon at 25° C. may be used alone or in combination of two or more.

[0015] Hydrocarbons that are liquid or paste-like at 25°C are available as commercially available cosmetic ingredients. Examples of commercially available products include "Carnation", "Kaydol", "Klearol", and "WHITE PROTEPT" (all manufactured by Sonneborn), and squalane (manufactured by Kishimoto Tokushu Kanyu Kogyosho).

[0016] The blending amount of component (A) contained in the oil-in-water emulsion composition according to this embodiment is 8% by mass or more and 20% by mass or less of the total mass of the oil-in-water emulsion composition. From the viewpoint of usability, the blending amount of component (A) is preferably 10% by mass or more and 15% by mass or less, more preferably 10% by mass or more and 13% by mass or less. When the blending amount of component (A) is 8% by mass or more, a sufficient moisturizing effect can be obtained, and when it is 20% by mass or less, it can be combined with components (B) and (C) described later. This can sufficiently reduce stickiness.

[0017] <(B) Nicotinamide> Component (B) contained in the water-in-oil type emulsion composition according to this embodiment is nicotinamide. Nicotinamide is one of the vitamin B group, which is a water-soluble vitamin, and is also called niacinamide. Nicotinamide can be used without particular limitation as long as it is commonly used in pharmaceuticals, quasi-drugs, and cosmetics, and these may be either natural or synthetic products. Nicotinamide is known to have effects such as wrinkle improvement, blood circulation promotion, rough skin improvement, melanin production inhibition, and whitening effect.

[0018] Nicotinamide is available as a commercially available cosmetic raw material. Examples of commercially available products include "Niacinamide USP PC (manufactured by Ark Science Japan)" and "Nicotinamide (manufactured by DSM)".

[0019] The blending amount of component (B) contained in the water-in-oil type emulsion composition according to this embodiment is 0.0001% by mass or more and 10% by mass or less in the total mass of the water-in-oil type emulsion composition. From the viewpoint of usability, the blending amount of component (B) is preferably 0.07% by mass or more and 6% by mass or less, and more preferably 0.1% by mass or more and 5% by mass or less. If the blending amount of component (B) is 0.0001% by mass or more, the stickiness derived from component (A) can be sufficiently suppressed, and the emulsification stability of the water-in-oil type emulsion composition over time can be synergistically enhanced by combining with component (C) described later. Further, if the blending amount of component (B) is 10% by mass or less, precipitation derived from nicotinamide can be suppressed.

[0020] <(C) Water-swellable clay mineral> The component (C) contained in the oil-in-water emulsion composition according to this embodiment is a water-swellable clay mineral. Examples of the water-swellable clay mineral include layered silicate minerals belonging to the smectite genus, such as montmorillonite, paidellite, nontronite, laponite, hectorite, and bentonite. The water-swellable clay mineral may be either natural or synthetic. From the viewpoint of usability, bentonite, montmorillonite, and hectorite are preferred as the water-swellable clay mineral. The water-swellable clay mineral is available as a commercially available cosmetic raw material. Examples of commercially available products include Kunipia and Sumecton (both manufactured by Kunimine Kogyo Co., Ltd.).

[0021] Water-swellable clay minerals are known to be used as adsorbents and hydrophilic thickeners, but in the oil-in-water emulsion composition according to the present embodiment, the water-swellable clay mineral, which is component (C), is used in combination with component (B) to synergistically increase emulsion stability over time. The effect of using components (B) and (C) in combination is much higher than the stability achieved when the water-swellable clay mineral is used alone.

[0022] The amount of component (C) contained in the oil-in-water emulsion composition according to this embodiment is 0.05% by mass or more and 5% by mass or less based on the total mass of the oil-in-water emulsion composition. From the viewpoint of usability, the amount of component (C) is preferably 0.1% by mass or more and 3% by mass or less, more preferably 0.1% by mass or more and 1% by mass or less. When the amount of component (C) is 0.05% by mass or more, the emulsion stability over time of the oil-in-water emulsion composition can be synergistically improved by using it in combination with component (B). In addition, when the amount of component (C) is 5% by mass or less, the coloring of the oil-in-water emulsion composition due to the color of the water-swellable clay mineral can be suppressed.

[0023] In the oil-in-water emulsion composition according to the present embodiment, the ratio of the amount of component (A) to the total amount of component (B) and component (C) ((A) / ((B)+(C))) is 1 or more and 150 or less. When the ratio is 1 or more, the composition is stable due to the amount of component (A) and component (B). Precipitation can be sufficiently prevented, and so long as it is 150 or less, the combined use of component (B) and component (C) can synergistically enhance the emulsion stability over time of the oil-in-water emulsion composition.

[0024] <Water> The oil-in-water emulsion composition according to the present embodiment contains water. There are no particular limitations on the water, and natural water, purified water, distilled water, ion-exchanged water, pure water, ultrapure water, etc. can be used. As the water, from the viewpoint of having fewer impurities, purified water, distilled water, ion-exchanged water, pure water, or ultrapure water is preferred.

[0025] The water content of the oil-in-water emulsion composition according to the present embodiment is 50% by mass or more and 95% by mass or less of the total mass of the oil-in-water emulsion composition. From the viewpoint of light spreadability and suppression of stickiness, the water content is preferably 55% by mass or more and 85% by mass or less, and more preferably 55% by mass or more and 80% by mass or less.

[0026] <(D) One or more selected from the group consisting of water-soluble collagen and hydrolyzed collagen> The oil-in-water emulsion composition according to the present embodiment may further contain one or more selected from the group consisting of water-soluble collagen and hydrolyzed collagen as component (D). By blending component (D), the moisturizing effect of component (A) can be synergistically improved. The origin of water-soluble collagen or hydrolyzed collagen includes, but is not limited to, marine organisms such as fish and jellyfish, and terrestrial organisms such as cows, pigs, and horses. As the water-soluble collagen, collagen may be used as it is, or collagen that is not water-soluble may be treated to become water-soluble before use. Furthermore, collagen that has been hydrolyzed by acid, alkali, enzyme treatment, etc. may also be used. Moreover, water-soluble collagen and hydrolyzed collagen may be used alone or in combination of two or more.

[0027] The blending amount of component (D) contained in the oil-in-water type emulsion composition according to the present embodiment is 0.0001% by mass or more and 0.5% by mass or less in the total mass of the oil-in-water type emulsion composition. From the viewpoint of usability, the content of component (D) is preferably 0.0005% by mass or more and 0.3% by mass or less, and more preferably 0.001% by mass or more and 0.1% by mass or less. If the blending amount of component (D) is 0.0001% by mass or more, the moisturizing effect can be synergistically enhanced by using it in combination with component (A). Further, if the blending amount of component (D) is 0.5% by mass or less, the odor derived from component (D) can be suppressed.

[0028] <Other components> In addition to the above-described components, the oil-in-water type emulsion composition according to the present embodiment may contain other components, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, oily components, polymer compounds, thickeners, powders (dyes, resins, pigments), preservatives, fragrances, moisturizers, physiologically active components, mineral salts, solvents, antioxidants, chelating agents, pearlescent agents, neutralizing agents, pH adjusters, plant extracts, enzymes and other components within a range that does not impair the object of the present invention, as appropriate.

[0029] In addition, a physiologically active component can be appropriately blended in the oil-in-water type emulsion composition according to the present embodiment within a range that does not impair the object of the present invention. A physiologically active substance is a substance that gives some physiological activity to the skin when applied to the skin. Examples thereof include anti-inflammatory agents, anti-aging agents, ultraviolet ray protectants, astringents, antioxidants, blood circulation promoters, antibacterial agents, bactericides, desiccants, cooling agents, warming agents, vitamins, amino acids, wound healing promoters, irritation relievers, analgesics, cell activators and the like.

[0030] The oil-in-water type emulsion composition according to the present embodiment can be produced according to a conventional method. Further, the oil-in-water type emulsion composition according to the present embodiment is, for example, a lotion, milk, cream, gel The oil-in-water emulsion composition according to the present embodiment can be used in cosmetics such as serums, sheet masks, makeup, body lotions, body gels, body creams, and makeup bases. When the oil-in-water emulsion composition according to the present embodiment is used in cosmetics, the formulation of the cosmetics can be arbitrarily selected depending on the purpose. That is, examples of the formulation include liquid, cream, gel, emulsion, sheet, stick, and aerosol forms. In addition, the oil-in-water emulsion composition according to the present embodiment can be used in products that are not limited to general cosmetics, and include quasi-drugs, designated quasi-drugs, and external medicines. EXAMPLES

[0031] The present invention will now be described in detail with reference to examples, but is not limited thereto. Prior to the examples, the test and evaluation methods employed in each example will be described.

[0032] After preparation, the oil-in-water emulsion compositions of the Examples and Comparative Examples were immediately left to stand at 40° C., room temperature, and −5° C. Six months after preparation, the samples left under each condition were visually evaluated according to the following criteria. <Judgment criteria> ◎: Not separated. ○: No separation, but the emulsion as a whole is coarse. △: Slight separation. ×: Completely separated.

[0033] Skin moisture evaluation test The forearms of 10 evaluation panelists were washed with lukewarm water, and then allowed to acclimate for 20 minutes under an environment with a temperature of 25°C and a relative humidity of 50%. An appropriate amount of the oil-in-water emulsion composition of the examples and comparative examples was then applied, and the skin was allowed to acclimate for 20 minutes under an environment with a temperature of 25°C and a relative humidity of 50% again, after which the stratum corneum moisture content (conductance value) was measured using a Corneometer (MPA580, Courage+Khazaka). The moisturizing effect was evaluated by calculating the moisturizing effect (%) from the following formula, and the average value of the five panelists was calculated, based on the following criteria. <Skin moisturizing effect rating> Moisture effect (%) = (skin moisture content after application / skin moisture content before application) x 100 (Evaluation criteria for skin moisturizing effect) ⊚: Moisturizing effect (%) was 150% or more. ◯: Moisturizing effect (%) was 125% or more and less than 150%. △: Moisturizing effect (%) was 100% or more and less than 125%. ×: Moisturizing effect (%) was less than 100%.

[0034] Non-stickiness evaluation test Ten expert panelists washed their forearms with lukewarm water, and then allowed them to acclimate for 20 minutes under an environment of 25°C and 50% relative humidity. Then, an appropriate amount of the oil-in-water emulsion composition of the Examples and Comparative Examples was applied, and a sensory evaluation was carried out on the stickiness of the skin during and after use, using the following rating system. The evaluation criteria were classified as follows, using the average value of the total scores of five panelists on the lack of stickiness. <Scores and details regarding non-stickiness> 5 points: Skin does not feel sticky during or after use. 4 points: Skin feels slightly sticky during and after use. 3 points: Skin feels slightly sticky during and after use. 2 points: Skin feels sticky during and after use. 1 point: The skin feels very sticky during and after use, which is uncomfortable. (Evaluation criteria for non-stickiness) ◎: Very good (average score of 5 people was 4 points or more) ○: Good (the average score of the 5 participants was 3 points or more and less than 4 points) △: Somewhat poor (the average score of 5 people was 2 points or more but less than 3 points) ×: Poor (the average score of 5 people was less than 2 points)

[0035] Skin moisture evaluation test The forearms of 10 evaluation panelists were washed with lukewarm water, and then allowed to acclimate for 20 minutes under an environment with a temperature of 25°C and a relative humidity of 50%. Then, an appropriate amount of the oil-in-water emulsion composition of the Examples and Comparative Examples was applied, and the skin was allowed to acclimate for 20 minutes under an environment with a temperature of 25°C and a relative humidity of 50%, and then the skin's freshness was evaluated using the following scoring system. The evaluation of the skin's freshness was classified as follows, using the average value of the sum of the scores of the five panelists according to the following evaluation criteria. <Score and details regarding skin moisture> 5 points: Skin feels very fresh and moisturized. 4 points: Skin feels slightly moist. 3 points: Neither. 2 points: Skin is slightly dry. 1 point: My skin doesn't feel fresh or moisturized at all. (Evaluation standard for skin moisture) ◎: Very good (average score of 5 people was 4 points or more) ○: Good (the average score of the 5 participants was 3 points or more and less than 4 points) △: Somewhat poor (the average score of 5 people was 2 points or more but less than 3 points) ×: Poor (the average score of 5 people was less than 2 points)

[0036] <Examples 1 to 9 and Comparative Examples 1 to 10> The oil-in-water emulsion compositions of Examples 1 to 9 and Comparative Examples 1 to 10 shown in Tables 1 and 2 were prepared by standard methods and evaluated by the respective test methods. The results are also shown in Tables 1 and 2.

[0037] [Table 1]

[0038] [Table 2]

[0039] As is clear from Tables 1 and 2, all of the oil-in-water emulsion compositions of the Examples had excellent performance. On the other hand, the Comparative Examples were inferior in any of the aspects of emulsion stability, skin moisture, stickiness, and skin freshness, and failed to achieve the object of the present invention.

[0040] Other examples of the skin cosmetic composition of the present invention are given below as Formulation Examples 1 to 5. The skin cosmetic compositions of these Formulation Examples were also examined for the above-mentioned emulsion stability, skin moisture, stickiness, and skin freshness, and were found to have excellent properties and be favorable in all respects.

[0041] Formulation example 1 (whitening makeup base cream) (mass%) (1) Nicotinamide 0.1% (2) Yuzu ceramide 0.9% (3) Hydrolyzed collagen 0.1% (4) Glycine 0.4% (5) Spirulina platensis extract 8.0% (6) Scutellaria baicalensis root extract 0.75% (7) Rosemary Leaf Extract 0.005% (8) Chamomile flower extract 0.0003% (9) Polygonum Root Extract 2.5% (10) Licorice Root Extract 5.0% (11) Althea Root Extract 0.0007% (12) Royal Jelly Extract 0.007% (13) Grapefruit Fruit Extract 0.85% (14) Fennel Fruit Extract 1.0% (15) Coix seed extract 0.01% (16) Lemon Fruit Extract 0.2% (17) Coenzyme Q10 0.001% (18) Cyclohexane-1,4-dicarboxylic acid Bisethoxydiglycol 0.75% (19) Dipotassium glycyrrhizinate 0.05% (20) Ascorbic acid 2-glucoside 2.0% (21) PEG-20 3.0% (22) Sodium N-stearoyl-L-glutamate 0.5% (23) Sorbitan monoisostearate 0.1% (24) PEG-10 glyceryl triisostearate 0.2% (25) PEG-60 hydrogenated castor oil 0.9% (26) Carboxyvinyl polymer 0.1% (27) Xanthan gum 0.01% (28) Hydrophobized hydroxypropyl methylcellulose 0.01% (29) Potassium hydroxide 0.02% (30) L-Arginine 0.01% (31)Tartaric acid 0.1% (32) Dipotassium phosphate 0.04% (33) Triethanolamine 0.02% (34) Ethylparaben 0.05% (35) Methylparaben 0.05% (36) Phenoxyethanol 0.5% (37) 3-O-Ethyl ascorbic acid 0.01% (38) Retinol palmitate 0.01% (39) dl-α-tocopherol nicotinate 0.05% (40) Mineral oil 10.0% (41) Octyldodecyl myristate 2.0% (42) Squalane 5.0% (43) Tri(caprylic / capric / myristic / stearic acid) Glyceryl Glyceryl 0.5% (44) Bentonite 0.1% (45) Di(phytosteryl / isostearyl) dilinoleate Cetyl / Stearyl / Behenyl) 0.3% (46) Ascorbyl dipalmitate 0.9% (47) Sodium cetyl sulfate 0.05% (48) Phenyltrimethicone 0.3% (49) Diphenyl trimethicone 0.1% (50) Purified water remainder

[0042] (Production method) (18)-(37) and a part of (50) are heated to about 80°C and stirred to dissolve uniformly (Liquid A). (38)-(49) are heated to about 80°C and stirred to dissolve uniformly (Liquid B). Liquid A is added to Liquid B and dispersed using a homogenizer. The mixture is then cooled, and a solution of (1)-(17) in the remainder of (50) at 40°C is added and further dissolved uniformly. The mixture is cooled again to 30°C to prepare a whitening makeup base cream.

[0043] Formulation example 2 (gel cream) (mass%) (1) Sodium Guaiazulene Sulfonate 0.5% (2) Nicotinamide 0.2% (3) Hydrolyzed collagen 0.1% (4) Tranexamic acid 2.0% (5) Sodium hyaluronate 0.5% (6) Trimethylglycine 0.5% (7) Glucosylceramide 0.1% (8) α-glucan 0.01% (9) Methyl gluceth-20 0.01% (10) Sodium pyrrolidone carboxylate 0.1% (11) Disodium edetate 0.01% (12) Polyethylene glycol (molecular weight 4000) 2.0% (13) Behenyl alcohol 1.0% (14) Sodium stearoyl glutamate 0.3% (15) Bentonite 0.2% (16) Hectorite 0.2% (17)HEDTA-3Na 0.005% (18) Citric acid 0.01% (19) Potassium hydroxide 0.22% (20) Dipropylene glycol 5.0% (21) 1,3-Butylene glycol 10.0% (22) Glyceryl monostearate 2.0% (23) Phytosteryl oleate 2.0% (24) Methylpolysiloxane (6CS) 1.5% (25) Mineral oil 6.0% (26) Squalane 6.0% (27) Vaseline 0.5% (28) Cholesterol 1.0% (29) Ceramide III 0.1% (30) Sorbitan isostearate 0.2% (31) Pure water remainder

[0044] (Production method) (9) to (21) and (31) were heated to 80°C and uniformly dissolved (liquid A). (22) to (30) were uniformly dissolved and then heated to 80°C (liquid B). Liquid A was added to liquid B, and the mixture was dispersed using a homomixer, and then cooled to room temperature to prepare a gel cream.

[0045] Formulation example 3 (wrinkle concealing cream) (mass%) (1) Hydrolyzed elastin 0.5% (2) α-glucan oligosaccharide 0.3% (3) Cucumber Fruit Extract 0.2% (4) English: (4) Ivy extract 0.1% (5) Silk hydrolyzate 0.3% (6) Hydrolyzed collagen solution (4) 0.9% (7) Rosa multiflora fruit extract 0.0008% (8) Kiwi extract 0.09% (9) Brown algae extract 0.0001% (10) Red algae extract 0.45% (11) Green Algae Extract 0.5% (12) Saccharomyces / Rice Fermentation Liquid 0.9% (13) Ethanol 15.0% (14) Polyethylene glycol 1000 1.0% (15) Polyoxyethylene (2) alkyl (12-15) phosphate 0.5% (16) Polyoxyethylene (2) oleyl ether 0.5% (17) PEG-60 hydrogenated castor oil 0.5% (18) Polyvinylpyrrolidone 0.1% (19) Carboxyvinyl polymer 0.3% (20) Potassium hydroxide 0.15% (21) Disodium edetate 0.05% (22)Fragrance 0.1% (23) Phenoxyethanol 0.2% (24) Bentonite 0.3% (25) Liquid paraffin 9.0% (26) Methylpolysiloxane (100cs) 1.0% (27) Vaseline 2.0% (28) Diphenyl trimethicone 1.5% (29) Purified water remainder

[0046] (Production method) (14) to (21) are added to (29) and heated to 70°C to dissolve uniformly (liquid A). (22) to (28) are heated to 60°C to disperse uniformly, added to liquid A, and dispersed using a homomixer. Next, (1) to (13) are added and stirred, and the mixture is filled into a tube container to prepare a wrinkle concealing cream.

[0047] Formulation example 4 (skin texture improving serum) (mass%) (1) Angelica keiskei leaf / stem extract 1.0% (2) Yuzu fruit extract 1.0% (3) Glucosyltrehalose 1.0% (4) Sodium chondroitin sulfate 0.7% (5) Ascorbic acid 2-glucoside 0.01% (6) Hydrolyzed collagen solution (4) 0.5% (7) α-glucan oligosaccharide 0.3% (8) Cucumber Fruit Extract 0.2% (9) English: (9) Ivy extract 0.1% (10) Elderberry Extract 0.5% (11) Parietaria Extract 0.75% (12) Arnica Flower Extract 0.3% (13) Lactobacillus / fermented pear juice filtrate 0.5% (14) Grape Leaf Extract 0.2% (15) Hypericum perforatum flower / leaf / stem extract 0.1% (16) Hamamelis virginiana leaf extract 0.2% (17) Horse Chestnut Leaf Extract 0.5% (18) Tilia officinalis extract 0.004% (19) Calendula officinalis flower extract 0.25% (20) Centauery Flower Extract 0.1% (21) Roman Chamomile Flower Extract 0.0001% (22) Peach Leaf Extract 0.0005% (23) Cyclohexane-1,4-dicarboxylic acid Bisethoxydiglycol 0.6% (24) (Sodium acrylate / sodium acryloyldimethyltaurate) Copolymer 0.6% (25) Polyquaternium-52 0.2% (26) POE(60) hydrogenated castor oil 0.1% (27) 1,3-Butylene glycol 6.0% (28) Glycerin 5.0% (29) Polyethylene glycol 4000 1.0% (30) Sorbitol 3.0% (31) Maltitol 3.0% (32) Diisopropanolamine 0.05% (33) Potassium hydroxide 0.05% (34) Carboxyvinyl polymer 0.1% (35) Alkyl-modified carboxyvinyl polymer 0.12% (36) Xanthan gum 0.05% (37) Disodium edetate 0.01% (38) Sodium pyrosulfite 0.005% (39) Squalane 14.0% (40) Cholesterol 0.5% (41) Tea tree leaf oil 0.0001% (42) Purified water remainder

[0048] (Production method) (1) to (38) and (42) were uniformly dissolved at 80°C, and (39) to (41) were uniformly dispersed at 80°C. The mixture was added and dispersed using a homomixer. The mixture was then cooled to prepare a skin texture-improving serum.

[0049] Formulation Example 5 (Sunscreen) (% by mass) (1) Allantoin 0.5% (2) Hydrolyzed collagen 0.2% (3) White clover extract 1.0% (4) Ethanol 15.0% (5) Dipropylene glycol 2.0% (6) Ethylhexyl methoxycinnamate 6.0% (7) Diethylaminohydroxybenzoylhexyl benzoate 1.0% (8) Bis-ethylhexyloxyphenol Methoxyphenyltriazine 1.0% (9) t-Butyl methoxydibenzoylmethane 6.0% (10) Aluminum octenyl succinate starch 0.2% (11) POE·POP modified dimethylpolysiloxane 1.0% (12) Octyldodecyl myristate 5.0% (13) Isononyl isononanoate 1.0% (14) Methylcyclopolysiloxane 1.0% (15) Dimethylpolysiloxane 1.0% (16) Hydrogenated lecithin 0.08% (17) Phytosterol 0.08% (18) DL-α-tocopherol acetate 0.1% (19) Mineral oil 17.0% (20) Tea Leaf Extract 0.005% (21) Angelica acutiloba root extract 0.002% (22) Orange flower water 0.9% (23) Water-soluble collagen 0.001% (24) Aloe vera leaf extract 0.01% (25) Betula platyphylla bark extract 0.1% (26) Ceramide NG 0.35% (27) Acetyl glucosamine 0.2% (28) Bentonite 0.1% (29) Disteardimonium hectorite 0.1% (30) Silica-coated zinc oxide 5.0% (31) Purified water remainder

[0050] (Production method) (1)-(3) are added to (31) heated to 80°C and dissolved (Liquid A). (5), (20)-(30) are added and heated to 80°C to disperse uniformly (Liquid B). (6)-(19) are heated to 70°C to dissolve uniformly (Liquid C). Liquids B and C are added to Liquid A in that order, mixed uniformly using a homomixer, and then cooled to 50°C. (4) is added thereto, mixed even more uniformly using a homomixer, and then cooled to obtain the sunscreen.

Claims

**Claim 1** An oil-in-water emulsion composition, containing the following (A) to (C) and water, wherein, based on the total mass of the oil-in-water emulsion composition, the content of component (A) is 8% by mass or more and 20% by mass or less, the content of component (B) is 0.0001% by mass or more and 10% by mass or less, the content of component (C) is 0.05% by mass or more and 5% by mass or less, and the content of water is 50% by mass or more and 95% by mass or less, and the ratio of the content of component (A) to the total content of components (B) and (C) ((A) / ((B)+(C))) is in the range of 1 or more and 150 or less, the oil-in-water emulsion composition. (A) A hydrocarbon that is liquid or paste-like at 25°C (B) Nicotinamide (C) A water-swellable clay mineral **Claim 2** containing the following (D), wherein, based on the total mass of the oil-in-water emulsion composition, the content of component (D) is 0.0001% by mass or more and 0.5% by mass or less, the oil-in-water emulsion composition according to claim 1. (D) One or more selected from the group consisting of water-soluble collagen and hydrolyzed collagen

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