Skin cosmetic composition and method for producing the skin cosmetic composition

Abstract

The present invention provides a skin cosmetic composition that offers a non-greasy, silky feel and provides excellent and long-lasting moisture. [Solution] The skin cosmetic composition contains (A) nicotinamide, (B) 0.1% to 10% by mass of one or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane, and mineral oil, (C) (c1) higher alcohols and (c2) higher fatty acids, (D) 5% to 20% by mass of at least one or more selected from glycerin, diglycerin, and polyglycerin, and (E) one or more surfactants selected from nonionic surfactants and sodium stearoyl glutamate, wherein the content ratio of component (c1) to component (c2), (c1) / (c2), is 1:2 to 2:1.

Description

Technical Field

[0001] The present invention relates to a skin cosmetic composition having a non-greasy silky feel, a good moisturizing feeling, and persistence, and a method for producing the skin cosmetic composition.

Background Art

[0002] A variety of cosmetics are provided on the market for skin care. Toners, emulsions, cream formulations for moisturizing, and for skin problems, for example, spot care and whitening cosmetics containing tranexamic acid, arbutin, vitamin C, etc., retinol for wrinkle and sagging care, niacinamide-containing cosmetics, and formulations for rough and dry skin care containing dipotassium glycyrrhizinate, rice power No. 11, etc. There are various cosmetics.

[0003] These various cosmetics used for the skin of the face, body, etc. each have characteristics selected by users, but it is natural that they are not sticky during and after use and have a moisturizing effect. Furthermore, the persistence of the effect and the actual feeling thereof are required regardless of short-term use or long-term continuous use. In order to obtain a moisturizing effect and a lasting feeling of moistness, for example, an emulsified composition containing ceramides, alkylene oxide derivatives, etc., which are essential components of the skin (Patent Document 1), an oily component having a melting point of 50 to 150°C, octamethyltrisiloxane, an emulsified emulsified composition combining an α-olefin oligomer and a nonionic surfactant (Patent Document 2), a cosmetic composition containing nicotinic acid amide, cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol, a surfactant, a liquid oil, and a polyhydric alcohol having an IOB value of 2.2 to 3.4 (Patent Document 3) have been proposed.

[0004] However, although those disclosed in Patent Documents 1 to 3 have a moisturizing effect and a persistence of a moist feeling, they have similar feelings and texture feelings. In order to be selected by users, not only a persistence of a moist feeling but also a cosmetic composition having a characteristic feeling and texture feeling is required.

Prior Art Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2024-105720 [Patent Document 2] Japanese Patent Publication No. 2023-165033 [Patent Document 3] Patent No. 7071830 [Overview of the project] [Problems that the invention aims to solve]

[0006] In view of the above circumstances, the present invention aims to provide a skin cosmetic composition that provides a non-sticky, silky feel and good moisturizing effect with lasting effects. [Means for solving the problem]

[0007] As a result of diligent research to achieve the objective, the inventors have found that the objective can be solved by having the following specific features of the invention.

[0008] The skin cosmetic composition according to the present invention is (A) Nicotinamide and (B) One or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane, and mineral oil, in an amount of 0.1% to 10% by mass, (C)(c1) higher alcohols and (c2) higher fatty acids, (D) At least one or more selected from glycerin, diglycerin and polyglycerin in an amount of 5% to 20% by mass, (E) Contains one or more surfactants selected from nonionic surfactants and sodium stearoyl glutamate, The content ratio (c1) / (c2) of component (c1) to component (c2) is between 1:2 and 2:1.

[0009] The cosmetic composition according to the present invention may be filled into a container equipped with a pump dispenser.

[0010] The cosmetic composition according to the present invention may further contain a thickening polymer, and its viscosity at 25°C may be 10,000 to 30,000 mPa·s.

[0011] A method for producing a cosmetic composition according to the present invention, comprising: a preparation step of preparing an oil phase containing at least component (B) and component (C), and an aqueous phase containing at least component (A), component (D), and component (E); and a mixing and emulsification step of mixing and emulsifying the oil phase and the aqueous phase, wherein the mixing and emulsification step is performed in two stages, and the temperature during mixing and emulsification in the second mixing and emulsification step is 50°C or lower. [Effects of the Invention]

[0012] The skin cosmetic composition according to the present invention can provide a non-greasy, silky feel, as well as good moisture retention and longevity. [Modes for carrying out the invention]

[0013] The following describes in detail skin cosmetic compositions and methods for producing skin cosmetic compositions according to embodiments of the present invention, but the present invention is not limited to the following embodiments. The present invention is not limited to each of the configurations described below, and various modifications are possible within the scope of the claims, and embodiments and examples obtained by appropriately combining the technical means disclosed in different embodiments and examples are also included in the technical scope of the present invention. Furthermore, unless otherwise specified in this specification, "A to B" representing a numerical range means "A or more, B or less".

[0014] <Skin cosmetic composition> The skin cosmetic composition according to this embodiment contains at least the following components (A) to (E). (A) Nicotinamide (B) One or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane, and mineral oil. (C) (c1) Higher alcohol and (c2) higher fatty acid (D) At least one or two or more selected from glycerin, diglycerin and polyglycerin (E) One or two or more surfactants selected from nonionic surfactants and sodium stearoyl glutamate

[0015] The component (A) of the skin cosmetic composition according to this embodiment is nicotinamide. Nicotinamide is a water-soluble vitamin, an amide compound of nicotinic acid (vitamin B3 / niacin), and one of the vitamin B group. Also, nicotinamide is also called niacinamide. In Japan, it has been approved as an active ingredient having effects such as wrinkle improvement, whitening, and prevention of rough skin in quasi-drugs cosmetics. Also in cosmetics, moisturizing, improvement of barrier function, collagen stimulation, lighting, anti-inflammation, anti-acne, protection from blue light, anti-po It is a component for which reduction is expected, and commercially available products can be used.

[0016] In the skin cosmetic composition according to this embodiment, the blending amount of the component (A) is not particularly limited, but in the total composition of the skin cosmetic composition, preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 10% by mass or less. If the blending amount of the component (A) is 0.01% by mass or more in the total composition of the skin cosmetic composition, the effect of imparting a moist feeling to the skin can be sufficiently obtained, and if it is 10% by mass or less, stickiness can be sufficiently suppressed.

[0017] The component (B) of the cosmetic composition according to this embodiment is one or two or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane and mineral oil.

[0018] Diisostearyl malate is a diester formed by esterifying two molecules of malic acid with isostearyl alcohol. It is also called distearyl malate. Diisostearyl malate is a liquid ester oil that has moderate viscosity, little stickiness, and excellent compatibility with other components, so it is widely used as an oily base in cosmetics.

[0019] Squalane is a saturated hydrocarbon with 30 carbon atoms obtained by hydrogenating squalene, having 4 methyl groups (-CH3) as side chains on its carbon chain. There are animal-based, plant-based, or synthetic hydrocarbons. It is colorless and has excellent lubricity, and is an oil widely used in cosmetics, moisturizers, ointments, etc.

[0020] Methylpolysiloxane is a linear siloxane polymer obtained by blocking the ends of dimethylpolysiloxane with trimethylsiloxy groups (-OSi(CH3)3), and is a type of silicone. Methylpolysiloxane is also called polydimethylsiloxane (PDMS) or dimethicone. It is transparent, inert, non-toxic, and non-flammable, and its uses are wide-ranging in cosmetics, such as imparting gloss, improving slipperiness, defoaming agents, lubricants, bases, solvents, surface modifiers, etc.

[0021] Mineral oil is a liquid hydrocarbon mixture composed of saturated components of paraffinic hydrocarbons and naphthenic hydrocarbons with 16 - 32 carbon atoms, obtained by distilling petroleum to remove solid paraffin and purifying. Mineral oil is chemically inert, has high oxidation stability, has lubricity, and is an oil widely used as a base in makeup, oil-based, cleansing, and creams, etc.

[0022] Diisostearyl malate, squalane, methylpolysiloxane, and mineral oil used as component (B) of the skin cosmetic composition according to this embodiment can use commercially available products. Also, as component (B), diisostearyl malate, squalane, methylpolysiloxane, and mineral oil may be used alone, or two or more types may be used.

[0023] In the skin cosmetic composition according to this embodiment, the amount of component (B) is 0.1% to 10% by mass of the total composition of the skin cosmetic composition, preferably 0.1% to 8% by mass. If the amount of component (B) is 0.1% by mass or more of the total composition of the skin cosmetic composition, sufficient moisturizing effect and duration can be obtained, and if it is 10% by mass or less, stickiness can be suppressed and a silky feel can be obtained.

[0024] Component (C) of the skin cosmetic composition according to this embodiment is (c1) a higher alcohol and (c2) a higher fatty acid.

[0025] (c1) Higher alcohols are a general term for monohydric alcohols with 6 or more carbon atoms (C6), Fatty alcohols are broadly classified into fatty alcohols derived from natural oils and fats, and synthetic alcohols derived from petrochemical products. Higher alcohols used in cosmetics can also be classified by degree of saturation, whether or not they are synthetic, chain structure, and number of carbon atoms. For example, saturated aliphatic alcohols include lauryl alcohol (12 carbon atoms), myristyl alcohol (14 carbon atoms), cetanol (16 carbon atoms), cetearyl alcohol (16 and 18 carbon atoms), stearyl alcohol (18 carbon atoms), arachidyl alcohol (20 carbon atoms), and behenyl alcohol (22 carbon atoms). Unsaturated aliphatic alcohols include oleyl alcohol. Synthetic alcohols can also be categorized by differences in the number of carbon atoms, branching chain, etc., and include hexyldecanol, isostearyl alcohol, octyldodecanol, decyltetradecanol, etc. In the skin cosmetic composition according to this embodiment, the higher alcohol is not particularly limited, but solid linear saturated higher alcohols with 14 or more carbon atoms, 15 or more carbon atoms, 16 or more carbon atoms, or 22 or more carbon atoms are preferred.

[0026] Furthermore, (c2) higher fatty acids refer to fatty acids with 12 or more carbon atoms. Fatty acids can be classified into saturated fatty acids, which have single bonds and no double bonds, and unsaturated fatty acids, which have one or more double bonds, based on their degree of unsaturation. Examples of higher fatty acids include saturated fatty acids such as lauric acid (12 carbon atoms), myristic acid (14 carbon atoms), palmitic acid (16 carbon atoms), stearic acid (18 carbon atoms), arachidic acid (20 carbon atoms), behenic acid (22 carbon atoms), lignoceric acid (24 carbon atoms), cerotic acid (26 carbon atoms), montanic acid (28 carbon atoms), monounsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, ricinoleic acid, eicosenoic acid, and erucic acid, and polyunsaturated fatty acids such as linoleic acid, γ-linolenic acid, and α-linolenic acid. Other examples include synthetic branched fatty acids with 18 carbon atoms such as isostearic acid, hydroxystearic acid with a hydroxyl group (-OH), and lanolin fatty acid, which is a mixture of animal fatty acids. In the skin cosmetic composition according to this embodiment, the higher fatty acids are not particularly limited, but solid linear higher fatty acids with 14 or more carbon atoms, 15 or more carbon atoms, 16 or more carbon atoms, or 18 or more carbon atoms can be preferably used. (C) The higher alcohols and higher fatty acids in component (C) can be commercially available products.

[0027] In the skin cosmetic composition according to this embodiment, each of component (C1) and component (C2) may be used alone or in combination of two or more, and the amount of each component can be determined as appropriate and used within the range of an effective amount.

[0028] The skin cosmetic composition according to this embodiment contains (c1) a higher alcohol and (c2) a higher fatty acid as component (C), and the content ratio (c1) / (c2) of component (c1) to component (c2) is 1:2 to 2:1. By setting the content ratio (c1) / (c2) in the range of 1:2 to 2:1, it is possible to obtain a non-sticky, pleasant feel and improve the longevity of the product. In addition, the higher alcohol of component (c1) acts as an auxiliary in creating a silky feel.

[0029] Component (D) of the skin cosmetic composition according to this embodiment is at least one or more selected from glycerin, diglycerin, and polyglycerin. By containing component (D), the skin cosmetic composition according to this embodiment can improve the feeling of moisture and other properties. Generally, glycerin, diglycerin, and polyglycerin are commonly used as texture modifiers and moisturizers.

[0030] Glycerin is a type of trihydric alcohol, specifically a trihydric alcohol (polyhydric alcohol) with three hydroxyl groups in its chemical structure. It exhibits very high hygroscopic properties, providing a moist feel to the skin and is widely used as a moisturizer. In nature, it is widely present in the fats and oils of animals and plants, including humans, as glycerides, which are esters with fatty acids.

[0031] Diglycerin is a colorless, odorless, transparent, viscous liquid, a polyol with four hydroxyl groups. It is a type of humectant. It has excellent moisturizing properties and is used as a moisturizer in various cosmetics, as well as a texture modifier, foam quality improver, and to add shine, moisture, and warmth to hair.

[0032] Polyglycerin is a viscous liquid derived from glycerin and is used in cosmetics as a humectant and additive. It has a structure in which multiple glycerin molecules are polymerized, ranging from dimers to decamers. For example, polyglycerin with two glycerin molecules is called diglycerin, with three molecules is called triglycerin, and with ten molecules it is called decaglycerin. It is a polyhydric alcohol with different molecular weights and hydroxyl groups. Even with the same number of glycerin molecules, there are differences in the bond structure, such as linear, cyclic, and branched, resulting in a variety of types.

[0033] In the skin cosmetic composition according to this embodiment, component (D) may be used alone or in combination of two or more types. Furthermore, in the skin cosmetic composition according to this embodiment, the amount of component (D) is 5% to 20% by mass of the total composition of the skin cosmetic composition, preferably 8% to 15% by mass, and more preferably 10% to 15% by mass. If the amount of component (D) is 5% by mass or more of the total composition of the skin cosmetic composition, a good moisturizing sensation and longevity can be sufficiently provided, and if it is 20% by mass or less, stickiness can be sufficiently suppressed.

[0034] Component (E) of the skin cosmetic composition according to this embodiment is one or more nonionic surfactants selected from nonionic surfactants and sodium stearoyl glutamate. Nonionic surfactants are surfactants that have hydrophilic groups such as hydroxyl groups (-OH) or ether bonds (-O-) that do not ionically dissociate in water, and can be classified into polyethylene glycol type and polyhydric alcohol type depending on the type of hydrophilic group. Examples of polyethylene glycol type nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene glycols, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, polyoxyethylene alkylamines, and polyoxyethylene fatty acid amides. Examples of polyhydric alcohol type nonionic surfactants include glycerin fatty acid esters, sorbitol and sorbitan fatty acid esters, pentaerythritol fatty acid esters, sucrose fatty acid esters, fatty acid alkanolamides, and alkyl polyglycosides.

[0035] Nonionic surfactants include, specifically, glyceryl stearate (SE), sorbitan isostearate, sorbitan sesquioleate, glyceryl caprylate, polyglyceryl-10 dioleate, diethylene glycol laurate, glyceryl stearate, polyglyceryl-6 isostearate, polyglyceryl-6 dicaprate, polyglyceryl-5 trioleate, polyglyceryl-10 diisostearate, polyglyceryl-10 laurate, polyglyceryl-10 oleate, polyglyceryl-10 (behenate / eicosanedioate), sucrose laurate, and polyoxyethylene sorbitan tetraoleate. Examples of nonionic surfactants include sorbitan palmitate, polyglyceryl-10 myristate, polyglyceryl-6 tricaprylate, polyglyceryl-5 trioleate, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene cetyl ether, sodium polyoxyethylene oleyl ether phosphate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene hydrogenated castor oil, polyoxyethylene glyceryl triisostearate, and polyoxyethylene (caprylic / capric acid) glyceryl. The (E) component of the skin cosmetic composition according to this embodiment is not particularly limited, but is preferably sodium stearoyl glutamate, sorbitan isostearate, or glyceryl stearate (SE). Furthermore, the nonionic surfactant used in the (E) component of the skin cosmetic composition according to this embodiment may be used alone or in combination of two or more types.

[0036] Sodium stearoyl glutamate is the sodium salt of a condensate of stearic acid and glutamic acid, and is an anionic surfactant classified as an acyl glutamate (AG) of amino acid-based surfactants. In the skin cosmetic composition according to this embodiment, the use of sodium stearoyl glutamate, an amino acid-based surfactant, can create a characteristic texture and sensory experience.

[0037] In the skin cosmetic composition according to this embodiment, the amount of component (E) is not particularly limited, but is preferably 0.01% to 15% by mass, and more preferably 0.1% to 10% by mass, of the total composition of the skin cosmetic composition. If the amount of component (E) is 0.01% by mass or more of the total composition of the skin cosmetic composition, a silky feel can be sufficiently obtained, and if it is 15% by mass or less, stickiness can be sufficiently suppressed.

[0038] The skin cosmetic composition according to this embodiment may further contain a thickening polymer. The thickening polymer component is not particularly limited, but any polymer component that exhibits thickening properties suitable for use in ordinary cosmetics is acceptable.Examples of thickening polymers include carrageenan, galactan, gum arabic, pectin, agar, mannan, glucomannan, starch, sodium carboxymethyl starch, hydroxypropyl starch, hydroxypropyl starch phosphate, corn starch, guar gum, locust bean gum, quince seed, hyaluronic acid, sodium hyaluronate, tragacanth gum, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, cellulose gum, cellulose, chondroitin sulfate, dermatan sulfate, glycogen, heparan sulfate, chondroitin, hydroxyethyl gua gum, carboxymethyl gua gum, dehydroxanthan gum, xanthan gum, dextran, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, sodium polyacrylate, polyethylene glycol, bentonite, hectorite, (acrylates / alkyl acrylate (C10-30)) crosspolymer, tamarind gum, tamarind seed gum, gellan gum, and more. Esalpinia spinosa gum, sodium polyglutamate, sodium alginate, sodium polyacrylate, Alcaligenes-producing polysaccharide, Porphyridium polysaccharide, Foliotamiclospora polysaccharide, Suizenji-nori polysaccharide, Tremella fuciformis polysaccharide, Sphingomonas culture extract, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, acrylates crosspolymer-2-Na, polyacrylate crosspolymer-6, sodium polyacryloyldimethyltaurate, (ammonium acryloyldimethyltaurate / methacrylate) Examples include beheneth-25 acid crosspolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, polyacrylate crosspolymer-11, (acrylates / steareth-20 methacrylate) copolymer, (steareth-100 / PEG-136 / HDI) copolymer, bis(C16-20) isoalkoxy(TMHDI / PEG-90) copolymer, and (acrylates / steareth-20 itaconicate) copolymer.In the skin cosmetic composition according to this embodiment, the thickening polymer may be used alone or in combination of two or more types.

[0039] In the skin cosmetic composition according to this embodiment, it is preferable that the viscosity of the skin cosmetic composition at 25°C is 10,000 to 30,000 mPa·s when the thickening polymer is included. By setting the viscosity to 10,000 to 30,000 mPa·s, when the skin cosmetic composition according to this embodiment is filled into a container such as a container equipped with a pump dispenser, the discharge of the skin cosmetic composition from the container can be made good. The content of the thickening polymer in the skin cosmetic composition is not particularly limited as long as the viscosity is in the range of 10,000 to 30,000 mPa·s, but is preferably 0.01% to 10% by mass, and more preferably 0.01% to 5% by mass, of the total amount of cosmetic composition. ru.

[0040] The skin cosmetic composition according to this embodiment may further contain fragrances, antibacterial agents, preservatives, amino acids, vitamins, bactericides, UV absorbers, surfactants, texture modifiers, etc., and one or more of these can be used in combination. The amount of each is not particularly limited, but can be determined as appropriate, preferably within the range of an effective amount.

[0041] The skin cosmetic composition according to this embodiment may be any of the following types: milk type, essence type, serum type, cream type, etc., which are fluid at room temperature, and may be filled into a container equipped with a pump dispenser.

[0042] The skin cosmetic composition according to this embodiment contains A. nicotinamide, B. 0.1% to 10% by mass of one or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane, and mineral oil, C. (c1) higher alcohols and (c2) higher fatty acids, D. 5% to 20% by mass of at least one or more selected from glycerin, diglycerin, and polyglycerin, and E. one or more surfactants selected from nonionic surfactants and sodium stearoyl glutamate. By setting the content ratio of component (c1) to component (c2), (c1) / (c2), to 1:2 to 2:1, a non-greasy, silky feel and good moisturizing effect with lasting effects can be provided.

[0043] <Method for producing skin cosmetic compositions> The method for producing the skin cosmetic composition according to this embodiment includes a preparation step of preparing an oil phase containing at least component (B) and component (C), and an aqueous phase containing at least component (A), component (D), and component (E), wherein the skin cosmetic composition contains the above-mentioned components (A) to (E), and comprises a mixing emulsification step of mixing the oil phase and the aqueous phase, wherein the mixing emulsification step is performed in two stages, and the temperature during mixing emulsification in the second mixing emulsification step is 50°C or lower.

[0044] The preparation step in the method for producing the skin cosmetic composition according to this embodiment is the step of preparing the oil phase and the aqueous phase, respectively. The oil phase contains at least the above-mentioned components (B) and (C). The aqueous phase contains at least the above-mentioned components (A), (D), and (E). The oil phase and aqueous phase in the preparation step are prepared by conventional methods, such as heating, mixing, and stirring.

[0045] The method for producing the skin cosmetic composition according to this embodiment includes a preparation step followed by a mixing and emulsification step. The mixing and emulsification step is a process of mixing and emulsifying the oil phase and the aqueous phase, and is performed in two stages. In the mixing and emulsification step, the temperature during the second mixing and emulsification is set to 50°C or lower. By setting the temperature during this second mixing and emulsification to 50°C or lower, the skin cosmetic composition produced can have an appropriate viscosity. The skin cosmetic composition having an appropriate viscosity can have a characteristic texture that evokes a feeling of moisture when used.

[0046] The method for producing the skin cosmetic composition according to this embodiment, which includes a preparation step and a mixing and emulsification step, makes it possible to produce a skin cosmetic composition that has a non-sticky, silky feel and provides good moisture retention and longevity. [Examples]

[0047] The present invention will be specifically described below with reference to examples, but the scope of the invention is not limited by these examples. The test methods for non-stickiness upon application, silky feel, moisturizing effect, and duration (sustainability) described in the examples are shown below. The amounts of the cosmetic compositions shown in Tables 1 and 2 below are expressed in mass percent.

[0048] (Not sticky) Five expert panelists applied one pump of each cosmetic composition shown in the examples and comparative examples, and conducted a sensory test regarding the lack of stickiness. The evaluation was conducted according to the following criteria. The pump container was specified to dispense 0.2g.

[0049] Evaluation criteria (non-stickiness, not sticky) ◎: 5 subjects answered that it was not sticky. ○: 4 subjects answered that it was not sticky. △: 3 subjects answered that it was not sticky. ×: Three or more subjects reported that it felt sticky.

[0050] (Silky texture) A panel of five experts applied one pump of the cosmetic compositions shown in the examples and comparative examples, which were filled into containers equipped with pump dispensers, and conducted a sensory test regarding the silky feel. The evaluation was conducted according to the following criteria. A silky feel refers to a sensory and textural sensation that feels slightly matte, powdery, and slightly thick, and is characterized by a different feel from the typical fresh and oily texture.

[0051] Criteria for evaluation (Does it have a silky feel and do you notice a difference from the average? No) ◎: Has a silky feel and is different from the average, according to 5 people. ○: It has a silky feel and feels different from the average, according to 4 people. △: Has a silky feel and is different from the average, but 3 people found it different. ×: Doesn't seem much different from the norm, but there are 3 or more people.

[0052] (Moisture feeling) Five expert panelists applied one pump of the cosmetic compositions shown in the examples and comparative examples, which were filled into containers equipped with pump dispensers, and conducted a sensory test regarding the moisturizing effect. The evaluation was performed according to the following criteria.

[0053] Criteria for evaluation (moisturizing effect present, absent) ◎: Moisturizing (5 people) ○: Provides a moisturizing feeling (4 people) △: Provides a moisturizing effect (3 people) ×: Moisturizing effect, but used by 2 people or less

[0054] (Durability / Sustained feeling) Five expert panelists applied one pump of the cosmetic compositions shown in the examples and comparative examples, which were filled into containers equipped with pump dispensers, and conducted sensory tests on their persistence and lasting effect, evaluating them according to the following criteria.

[0055] Criteria for evaluation (persistence / sustainability present, absent) ◎: 5 people felt it was persistent or had a lasting effect. ○: Four people felt that it was persistent or had a lasting effect. △: 3 people felt it was persistent or had a lasting effect. ×: More than 3 people feel that the effect is not lasting or doesn't last.

[0056] [Table 1]

[0057] [Table 2]

[0058] As shown in Tables 1 and 2, the cosmetic compositions of the present invention in Examples 1 to 8 were superior to Comparative Examples 1 to 5 in terms of non-stickiness upon application, silky feel, moisturizing effect, and duration (sustainability).

[0059] Below, Example 9 is given as another example of a formulation of the cosmetic composition of the present invention. The cosmetic composition of Example 9 was also examined for the non-stickiness upon application, silky feel, moisturizing effect, and duration (sustainability) described above, and it was found to be excellent in Example 9 as well.

[0060] Example 9 (Beauty Serum) Blend amount (mass%) (1) Liquid paraffin 5.0% (2) Squalane 0.5% (3) Diisostearyl malate 0.5% (4) Behenyl alcohol 0.5% (5) Stearyl alcohol 0.3% (6) Stearic acid 0.8% (7) Polyoxyethylene hydrogenated castor oil 0.5% (8) Sodium hyaluronate 0.5% (9) Proteoglycan 0.1% (10) Betaine 3.0% (11) Sodium stearoyl glutamate 0.5% (12) Carbomer 0.2% (13) Glycerin 10.0% (14) Nicotinamide 0.5% (15) Lemon fruit extract 0.1% (16) EDTA-2Na 0.01% (17) Polyglycerin 5.0% (18) Phenoxyethanol 0.5% (19) Hydrolyzed collagen 0.1% (20) Jojoba leaf extract 0.1% (21) Citric acid 0.01% (22) Polyethylene glycol 1000 0.1% (23) Rice fermentation liquid 0.1% (24) Yuzu fruit extract 0.1% (25) Cholesterol 0.1% (26) Potassium hydroxide, appropriate amount (27) Pure water remaining

[0061] (Manufacturing Method) (1) to (6) and (25) were heated to around 80°C, and the oil phase was prepared by adding and dispersing them while stirring uniformly. (7) to (24) and a portion of (27) were heated to around 80°C, and the aqueous phase was prepared by adding and dispersing them while stirring uniformly. A neutralizing agent base was prepared by stirring (26) and a portion of (27) uniformly. The prepared aqueous phase and oil phase were mixed and stirred once at around 80°C, and then the temperature was lowered to below 50°C and the aqueous phase and oil phase were mixed and stirred with the neutralizing base. After that, the mixture was defoamed, cooled, and then filled into a dispenser pump container to obtain the beauty serum.

Claims

1. (A) Nicotinamide and (B) One or more liquid oils selected from diisostearyl malate, squalane, methylpolysiloxane, and mineral oil, in an amount of 0.1% to 10% by mass, (C) (c1) higher alcohols and (c2) higher fatty acids, (D) At least one or more selected from glycerin, diglycerin and polyglycerin in an amount of 5% to 20% by mass, (E) Contains one or more surfactants selected from nonionic surfactants and sodium stearoyl glutamate, A skin cosmetic composition in which the content ratio (c1) / (c2) of component (c1) to component (c2) is 1:2 to 2:

1.

2. A skin cosmetic composition according to claim 1, which is filled into a container equipped with a pump dispenser.

3. Furthermore, the cosmetic composition according to claim 1 or 2, further containing a thickening polymer and having a viscosity of 10,000 to 30,000 mPa·s at 25°C.

4. A method for producing the skin cosmetic composition described in claim 1, A preparation step of preparing an oil phase containing at least component (B) and component (C), and an aqueous phase containing at least component (A), component (D), and component (E), This includes a mixed emulsification step in which the oil phase and the aqueous phase are mixed and emulsified, A method for producing a skin cosmetic composition, comprising performing a mixing and emulsification process in two stages, wherein the temperature during the second mixing and emulsification stage is 50°C or lower.

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