Skin cosmetics

Abstract

To provide skin cosmetics that penetrate easily, do not slip on the skin when applied, start to blend quickly, gradually make the fingers feel heavy, do not leave the skin sticky after application, and provide a moisturizing feeling (a moist feeling) that lasts.SOLUTION: Provided is a skin cosmetic comprising the following ingredients (A), (B), (C), and (D): (A) an alkylene oxide derivative, (B) a polymer or copolymer having 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer, (C) a polyethylene glycol having a number average molecular weight of 1,800 to 40,000, and (D) water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin cosmetic. [Background technology]

[0002] Conventionally, cosmetics that are non-sticky, have an excellent feel when used, and have an excellent moisturizing effect have been investigated. For example, Patent Document 1 describes that a skin cosmetic containing an acidic mucopolysaccharide, an alkylene oxide derivative, and a dihydric to tetrahydric alcohol has an excellent feel when used, with little feeling of squeaking or stickiness, and has excellent moisturizing effects. Patent Document 2 describes that a moisturizing cosmetic containing trimethylglycine, a water-soluble alkylene oxide derivative that is liquid at 25°C, and a polyhydric alcohol has excellent compatibility with the skin when applied, can be spread without causing a squeaky feeling, reduces stickiness after application, and provides excellent moisturizing effects. Patent Document 3 describes that a skin care composition containing a polymer or copolymer whose constituent monomer is methacryloyloxyethyl phosphorylcholine having an average molecular weight of 100,000 to 1,000,000 and polyethylene glycol having an average molecular weight of 100,000 to 5,000,000 spreads well when applied to the skin, is not sticky, and provides a smooth feel to the skin. Patent Document 4 describes that a composition containing tripropylene glycol, a homopolymer or copolymer of 2-methacryloyloxyethyl phosphorylcholine, a polyoxyalkylene alkyl glucoside, and water provides non-stickiness, long-lasting moisturizing, and improved skin transparency. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-124193 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-14540 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-43018 [Patent Document 4] Japanese Patent Application Publication No. 2018-188423 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional cosmetics have the problem of not penetrating well, slipping easily onto the skin, and being difficult to blend in. They also leave the skin sticky after application and are not fully moisturizing. [Means for solving the problem]

[0005] The present inventors have discovered that by using a combination of an alkylene oxide derivative, a polymer or copolymer having 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer, and polyethylene glycol having a number-average molecular weight of 1,800 to 40,000, it is possible to obtain a skin cosmetic that has a penetrating feel, is not slippery when applied to the skin, begins to blend quickly, gradually makes the fingers feel heavy, does not leave the skin sticky after application, and provides a moisturizing feel (a moist feeling), with the moisturizing feeling lasting.

[0006] The present invention relates to a composition comprising the following components (A), (B), (C) and (D): (A) an alkylene oxide derivative, (B) a polymer or copolymer containing 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer, (C) polyethylene glycol having a number average molecular weight of 1,800 to 40,000; (D)Water The present invention relates to a skin cosmetic containing the compound. [Effects of the Invention]

[0007] The skin cosmetic of the present invention has a penetrating feel, does not have a slippery feel when applied to the skin, starts to be absorbed quickly, gradually makes the fingers feel heavy, does not leave the skin sticky after application, and provides a moisturizing feel (a moist feeling) that lasts. DETAILED DESCRIPTION OF THE INVENTION

[0008] The alkylene oxide derivative of component (A) used in the present invention includes those represented by general formula (1).

[0009] [ka]

[0010] (In the formula, n represents an integer of 1 to 10, Z represents a hydrogen atom or a group obtained by removing n hydroxy groups from a hydroxy compound having 1 to 30 carbon atoms, EO represents an ethylene oxide group, PO represents a propylene oxide group, AO represents an alkylene oxide group having 2 to 5 carbon atoms, and a, b, and c represent the average number of moles added of each alkylene oxide group and independently represent 0 to 200, provided that a, b, and c cannot all be 0. When Z is a hydrogen atom, n is 1. In addition, within the brackets [ ], the alkylene oxide groups may be added randomly or in blocks.

[0011] In the formula, when a, b, and c are each other than 0, From the viewpoint of improving the feeling of penetration into the skin, a is preferably 0.5 to 200, more preferably 1 to 170, even more preferably 1.5 to 100, and even more preferably 2 to 50. From the viewpoint of improving the feeling of penetration into the skin, b is preferably 0.1 to 200, more preferably 0.5 to 170, even more preferably 0.8 to 100, and even more preferably 1 to 50. From the viewpoint of improving the feeling of penetration into the skin, c is preferably 0.1 to 200, more preferably 0.3 to 100, even more preferably 0.5 to 50, and even more preferably 0.8 to 10.

[0012] Furthermore, from the viewpoint of improving the feeling of penetration into the skin, Z is preferably a hydrogen atom or a group obtained by removing n hydroxy groups from an alkyl monoalcohol having 4 to 24 carbon atoms, glycerin, an alkyl glycoside, diglycerin, or sorbitol, i.e., a group derived from these alcohol compounds, more preferably a hydrogen atom or a group derived from an alkyl monoalcohol having 4 to 24 carbon atoms, glycerin, or an alkyl glycoside, even more preferably a hydrogen atom or a group derived from an alkyl monoalcohol having 2 to 6 carbon atoms, glycerin, or methyl glucoside, and even more preferably glycerin or methyl glucoside.

[0013] More specifically, component (A) is: Examples of Z being a group derived from glycerin include: Examples include polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) (5P.O.) (cosmetic labeling name: PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin), polyoxypropylene glyceryl ether (cosmetic labeling name: PPG-16 glyceryl ether), etc.; Examples of Z being a group derived from methyl glucoside include: Examples include polyoxyethylene methyl glucoside (cosmetic labeling names: methyl gluceth-10, methyl gluceth-20), polyoxypropylene methyl glucoside (cosmetic labeling names: PPG-10 methyl glucose, PPG-20 methyl glucose), etc.; Examples of Z being a group derived from an alkyl monoalcohol having 4 carbon atoms include: Examples include polyoxyethylene polyoxypropylene butyl ether (cosmetics labeling names: PPG-10 buteth-9, PPG-17 buteth-17); Examples of groups in which Z is derived from sorbitol include: Examples include polyoxypropylene sorbitol (cosmetic labeling names: PPG-25 sorbitol, PPG-10 sorbitol); When Z is a hydrogen atom, Polypropylene glycol (cosmetic labeling name: PPG-7, PPG-34), Examples include polyoxyethylene polypropylene glycol (cosmetic labeling names: PEG / PPG-150 / 35 copolymer, PEG / PPG-160 / 30 copolymer); Examples of groups in which Z is derived from diglycerol include: Examples include polyoxypropylene diglyceryl ether (cosmetics labeling name: PPG-14 polyglyceryl-2 ether, PPG-9 diglyceryl). Methyl gluceth-10 is also called polyoxyethylene methyl glucoside (10 EO), and methyl gluceth-20 is also called polyoxyethylene methyl glucoside (20 EO). Among these, it is preferable to include one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-7, PPG-10 depth-9, and PPG-17 depth-17; More preferably, it contains one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-10 depth-9, and PPG-17 depth-17; More preferably, the surfactant contains one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, methyl gluceth-10, and methyl gluceth-20; It is even more preferable that the composition contains one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and methyl gluceth-20, It is especially preferred to include PEG / PPG / Polybutylene Glycol-8 / 5 / 3 glycerin.

[0014] The alkylene oxide derivative of component (A) can be synthesized by a known method. Also, Wilbride S-753 (PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin), Macbiobride MG-10E (methyl gluceth-10), Macbiobride MG-20E (methyl gluceth-20), Macbiobride MG-10P (PPG-10 methyl glucose), Macbiobride MG-20P (PPG-20 methyl glucose), Unilube 50MB-11 (PPG-10 buteth-9), Unilube 50MB-26 (PPG-17 buteth-17), Uniol HS-1600D (PPG-25 sorbitol), Pronon #208 (PEG / PPG-150 / 35 copolymer), Uniol D- Commercially available products such as 400 (PPG-7), Uniol D-2000 (PPG-34) (all manufactured by NOF Corporation); SY-DP14T (PPG-14 polyglyceryl-2 ether), SY-DP9 (PPG-9 diglyceryl) (all manufactured by Sakamoto Pharmaceutical Industry Co., Ltd.); Newpol GP-1000 (PPG-16 glyceryl ether), Newpol SP-750 (PPG-10 sorbitol), Newpol PE-68 (PEG-160 / 30 copolymer), Newpol PE-78 (PEG-150 / 35 copolymer) (all manufactured by Sanyo Chemical Industry Co., Ltd.); and Emulgen PP-290 (PEG / PPG-160 / 30 copolymer, manufactured by Kao Corporation) can also be used.

[0015] One or more types of component (A) can be used, and the content is preferably 0.01 to 15% by mass, more preferably 0.5 to 10% by mass, and even more preferably 3 to 6% by mass, of the total composition, from the viewpoints of improving the feeling of penetration into the skin, accelerating the onset of absorption by reducing the slippery feeling when applied to the skin, gradually giving a feeling of heaviness in the fingers during application, reducing stickiness on the skin after application, improving the moisturizing feeling (moisturizing feeling), and improving the duration of the moisturizing feeling.

[0016] The component (B) used in the present invention is a polymer or copolymer containing 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer. The polymer or copolymer of component (B) contains 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer, and may be a copolymer with other monomers. As the other monomer, alkyl methacrylate is preferred, alkyl methacrylate having an alkyl group with 4 to 20 carbon atoms is more preferred, and butyl methacrylate, stearyl methacrylate, and the like are more preferred.

[0017] More specifically, preferred examples of component (B) include polymethacryloyloxyethyl phosphorylcholine, 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer, and 2-methacryloyloxyethyl phosphorylcholine-stearyl methacrylate copolymer. For example, a 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer is a polymer obtained by copolymerizing 2-methacryloyloxyethyl phosphorylcholine with butyl methacrylate. The molar ratio of 2-methacryloyloxyethyl phosphorylcholine to butyl methacrylate in the polymer is preferably 1:0.2 to 1:3. The weight-average molecular weight is preferably 10,000 to 2,000,000, more preferably 100,000 to 1,000,000. The weight-average molecular weight is measured by gel permeation chromatography. Alternatively, commercially available products such as Lipidure-HM (2-polymethacryloyloxyethylphosphorinecholine), Lipidure-PMB (2-polymethacryloyloxyethylphosphorinecholine-butyl methacrylate copolymer liquid), and Lipidure-S (2-polymethacryloyloxyethylphosphorinecholine-stearyl methacrylate copolymer) (all manufactured by NOF Corporation) can be used.

[0018] Component (B) may be used alone or in combination with other components. The content is preferably 0.0005 to 0.5% by mass, more preferably 0.0015 to 0.3% by mass, and even more preferably 0.0035 to 0.1% by mass of the total composition, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when applied to the skin, thereby accelerating the onset of absorption, giving a feeling of gradually increasing finger heaviness during application, reducing stickiness on the skin after application, and improving the feeling of moisturization (moisturization).

[0019] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 10 to 3,000, more preferably 100 to 2,000, even more preferably 300 to 1,500, and even more preferably 600 to 1,100, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when applied to the skin and thereby accelerating the onset of absorption, providing a feeling that the fingers gradually become heavier during application, reducing stickiness on the skin after application, improving the moisturizing feeling (moisturizing feeling), and improving the duration of the moisturizing feeling.

[0020] Component (C) is a polyethylene glycol having a number average molecular weight of 1,800 to 40,000. The polyethylene glycol having a number average molecular weight of 1800 to 40000 as component (C) preferably has a number average molecular weight of 2000 to 30000, more preferably 2200 to 20000, and even more preferably 2500 to 10000, from the viewpoints of reducing stickiness on the skin after application and improving the duration of the moisturizing feeling. Furthermore, examples of polyethylene glycols having a number average molecular weight of 1,800 to 40,000 include polyethylene glycol 4000 (number average molecular weight: 3,100), polyethylene glycol 6000 (number average molecular weight: 8,800), polyethylene glycol 11,000 (number average molecular weight: 11,000), and polyethylene glycol 20,000 (number average molecular weight: 22,000). From the viewpoints of reducing stickiness on the skin after application and improving the sustained moisturizing feeling, it is preferable to contain one or more selected from polyethylene glycol 4000, polyethylene glycol 6000, and polyethylene glycol 11,000, more preferably to contain one or more selected from polyethylene glycol 4000 and polyethylene glycol 6000, and even more preferably to contain polyethylene glycol 4000.

[0021] The number average molecular weight of polyethylene glycol is measured by the following method. (Measurement of number average molecular weight) The number average molecular weight of polyethylene glycol is measured as follows. (Measurement equipment and conditions) Tosoh Corporation, integrated GPC device Equipment: HLC-8220GPC Detector: RI (differential refractometer) Column: TSK-gel G5000HxL (7.8 x 300 mm) x 1 G4000HxL(7.8×300mm)×1 G3000HxL(7.8×300mm)×1 G2000HxL(7.8×300mm)×1 Mobile phase: THF (tetrahydrofuran) Flow rate: 1.0mL / min Set temperature: 40℃ Injection volume: 100 μL (sample concentration: 0.4%) Measure the number average molecular weight converted to polystyrene*. *Polystyrene: Tosoh Corporation, TSK standard polystyrene

[0022] One or more types of component (C) can be used, and the content is preferably 0.01 to 5 mass %, more preferably 0.1 to 3 mass %, and even more preferably 0.3 to 1.5 mass % of the total composition, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when applied to the skin, thereby accelerating the onset of absorption, gradually giving a feeling of heaviness in the fingers during application, reducing stickiness on the skin after application, and improving the duration of the moisturizing feeling.

[0023] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.1 to 50, more preferably 0.5 to 30, even more preferably 1.5 to 10, and even more preferably 3 to 5.5, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when blended into the skin, thereby accelerating the onset of blending, giving a feeling that the fingers gradually become heavier during application, reducing stickiness on the skin after application, improving the moisturizing feeling (moisturizing feeling), and improving the duration of the moisturizing feeling.

[0024] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.001 to 0.5, more preferably 0.0015 to 0.4, even more preferably 0.002 to 0.3, and even more preferably 0.0038 to 0.128, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when blended into the skin, thereby accelerating the onset of blending, giving a feeling that the fingers gradually become heavier during application, reducing stickiness on the skin after application, improving the moisturizing feeling (moisturizing feeling), and improving the duration of the moisturizing feeling.

[0025] In the present invention, the content of water as component (D) is preferably 60 to 95 mass % of the total composition, more preferably 70 to 93 mass %, and even more preferably 75 to 90 mass %, from the viewpoints of improving the feeling of penetration into the skin and reducing stickiness on the skin after application.

[0026] The skin cosmetic of the present invention may further contain (E) a nonionic surfactant having an HLB of 10-20. The nonionic surfactant of component (E) preferably has an HLB of 9 to 18, more preferably an HLB of 11 to 16, and even more preferably an HLB of 12 to 15, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when blended into the skin, thereby accelerating the onset of blending, and gradually giving the feeling that the fingers become heavier during application. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion relative to the total molecular weight of the surfactant, and is calculated using Griffin's equation. Furthermore, when a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows: The HLB of the mixed surfactant is the arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

[0027] Examples of such nonionic surfactants include polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene alkanol ethers, polyglycerin fatty acid esters, sucrose fatty acid esters, etc. Among these, from the viewpoints of improving the feeling of penetration into the skin, reducing the feeling of slippery surface when blended into the skin, thereby accelerating the onset of blending, and providing a feeling of gradually heavier fingers during application, it is preferable to contain one or more selected from polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene fatty acid esters, more preferably to contain one or more selected from polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene alkyl ethers, and even more preferably to contain polyoxyethylene hydrogenated castor oil.

[0028] One or more types of nonionic surfactants may be used as component (E), and the content is preferably 0.0001 to 1 mass % of the total composition, more preferably 0.005 to 0.6 mass %, and even more preferably 0.05 to 0.25 mass %, from the viewpoints of improving the feeling of penetration into the skin, reducing the slippery feeling when blended into the skin, thereby accelerating the onset of blending, gradually giving a feeling of heaviness in the fingers during application, and reducing stickiness on the skin after application.

[0029] The skin cosmetic of the present invention may further contain (F) a polyhydric alcohol other than components (A) and (C), which can improve the moisturizing feeling (moist feeling) and its duration. The polyhydric alcohol is a compound having two or more hydroxyl groups in the molecule, and any of those commonly used in cosmetics may be used. Examples of dihydric alcohols include polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, and propanediol. Examples of trihydric alcohols include glycerin and trimethylolpropane. Examples of tetrahydric alcohols include diglycerin and erythritol. Examples of pentahydric or higher polyhydric alcohols include polyglycerins such as triglycerin; sugars and sugar alcohols such as glucose, maltose, maltose, sucrose, xylitol, sorbitol, and malbitol.

[0030] From the viewpoint of improving the moisturizing feeling (moisturizing feeling) and extending the duration of the moisturizing feeling, the polyhydric alcohol of component (F) preferably contains one or more selected from dihydric alcohols, trihydric alcohols, and tetrahydric alcohols, more preferably contains one or more selected from dihydric alcohols and trihydric alcohols, even more preferably contains a dihydric alcohol, still more preferably contains one or more selected from propanediol, dipropylene glycol, and 1,3-butylene glycol, and especially preferably contains dipropylene glycol.

[0031] The polyhydric alcohol of component (F) can be used alone or in combination with two or more kinds, and the content is preferably 1 to 20% by mass, more preferably 5 to 15% by mass, and even more preferably 7 to 13% by mass of the total composition, from the viewpoints of reducing stickiness on the skin after application, improving the moisturizing feeling (moisturizing feeling), and improving the duration of the moisturizing feeling.

[0032] In addition to the above-mentioned components, the skin cosmetic of the present invention may contain components commonly used in cosmetics, such as surfactants other than the component (E), oily components, polymeric compounds such as thickeners other than the components (A), (B), and (C), antioxidants, sequestering agents, fragrances, preservatives, pH adjusters, blood circulation promoters, antiperspirants, disinfectants, skin activators, cooling agents, and colorants.

[0033] In view of providing a feeling of gradual finger heaviness during application, the skin cosmetic of the present invention preferably contains ethanol at a content of 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.1% by mass or less.

[0034] The skin cosmetic of the present invention preferably contains a thickener in an amount of 0.3% by mass or less, more preferably 0.2% by mass or less, and even more preferably 0.15% by mass or less, from the viewpoints of improving the feeling of penetration into the skin, reducing the feeling of slippery skin when blended into the skin, thereby accelerating the onset of blending, and reducing stickiness on the skin after application.

[0035] In order to improve the feeling of penetration into the skin and reduce stickiness of the skin after application, the skin cosmetic of the present invention preferably contains an oily component in an amount of 3% by mass or less, more preferably 1% by mass or less, and even more preferably 0.5% by mass or less.

[0036] The skin cosmetic of the present invention can be produced by a conventional method, for example, by adding components (A) to (C) to water (component (D)) and mixing them to homogenize. When solid components are used, they may be heated to dissolve them as needed before mixing.

[0037] The viscosity of the skin cosmetic of the present invention at 25°C is preferably 1000 mPa·s or less, more preferably 1 to 1000 mPa·s, even more preferably 1 to 500 mPa·s, even more preferably 1 to 200 mPa·s, and especially preferably 1 to 100 mPa·s. In the present invention, the viscosity is measured at 25°C using a vibration viscometer VISCOMATE VM-10A (manufactured by SEKONIC Corporation).

[0038] The skin cosmetic of the present invention is suitable as a water-based cosmetic, and is more preferably an aqueous liquid cosmetic. The skin cosmetic of the present invention is preferably a lotion, a beauty serum, an emulsion, etc., and more preferably a lotion. When used as a lotion, it can be used in the form of a mist or by impregnating a sheet. The skin cosmetic of the present invention begins to absorb quickly and gradually becomes heavy under the fingers, causing a sense of excitement as the skin cosmetic penetrates into the skin, and the non-sticky, moist feeling after application creates a sense of satisfaction. Such a pleasant sensation can evoke positive emotions. [Example]

[0039] Examples 1 to 7, Comparative Examples 1 to 3 Skin cosmetics were manufactured with the compositions shown in Table 1, and the following were evaluated: penetration, speed of initial absorption (absence of slippery feeling), gradual feeling of heaviness in the fingers, absence of stickiness on the skin after application, moisturizing feeling on the skin after application (moist feeling), duration of moisturizing feeling, advancing contact angle (°), receding contact angle (°), and viscosity (mPa·s). The results are also shown in Table 1.

[0040] (Manufacturing method) (1) Citric acid, sodium citrate, and EDTA-2Na were added to a portion of the water of component (D), and the mixture was stirred at 60°C until homogenized, yielding Preparation 1. (2) Component (E) was heated to 60°C to make it liquid, and then added to the remainder of component (D) water at 25°C. After stirring and homogenizing, preparation 2 was obtained. (3) At 25°C, components (A), (B), (C), (F), preparation 1, and phenoxyethanol were added to preparation 2, and the mixture was stirred until homogenous, thereby producing a skin cosmetic.

[0041] (Evaluation method) (1) Penetration feeling: Three cosmetic expert evaluators applied 0.3 g of each skin care product to the back of their hand in a circular motion with their fingers for 40 seconds, and then performed a sensory evaluation of the sensation of penetration according to the following criteria. The results are shown as the total score of the three evaluators. 5: Very penetrating. 4: It feels penetrating. 3: There is a slight feeling of penetration. 2: It doesn't penetrate very well. 1: No penetration.

[0042] (2) Quick absorption (no slippery feeling): Three cosmetic expert evaluators applied 0.3 g of each skin care product to the back of their hand in a circular motion using their fingers. Sensory evaluation was conducted within 10 seconds on the speed at which the product began to blend (lack of a slippery feeling) according to the following criteria. A lack of a slippery feeling was rated as a quick start to blend, while a slippery feeling was rated as a slow start to blend. The results are shown as the total scores of the three evaluators. 5: It starts to blend in very quickly. 4: It starts to blend in quickly. 3: Starts to blend in rather quickly. 2: It takes a little while to blend in. 1: It takes a long time to get used to it.

[0043] (3) Gradually feeling like your fingers are getting heavier: Three cosmetic expert evaluators applied 0.3g of each skin care product to the back of their hand in a circular motion using their fingers. Sensory evaluation was conducted according to the following criteria to assess the feeling of gradual weight gain (finger resistance) of the fingers over a period of 10 to 40 seconds. If the fingers suddenly became heavy, or if the fingers did not become heavy at all and instead slipped away, the evaluation was based on the feeling of no gradual weight gain. The results are shown as the total score of the three evaluators. 5: I feel like my fingers are gradually getting heavier. 4: My fingers feel gradually heavier. 3: I feel like my fingers are gradually becoming heavier. 2: I don't really feel like my fingers are gradually getting heavier. 1: My fingers don't feel like they're gradually getting heavier.

[0044] (4) No stickiness on the skin after application: Three cosmetic expert evaluators applied 0.3 g of each skin cosmetic product to the back of their hand in a circular motion using their fingers for 40 seconds, and then evaluated the lack of stickiness on the skin according to the following criteria. The results are shown as the total score of the three evaluators. 5: No stickiness at all. 4: Non-sticky. 3: Almost no stickiness. 2: Slightly sticky. 1: Sticky.

[0045] (5) Moisturizing feeling (moist feeling) on ​​skin after application: Three cosmetic expert evaluators applied 0.3 g of each skin cosmetic product to the back of their hand in a circular motion using their fingers for 40 seconds, and then evaluated the moisturizing (moist feeling) of the skin after application according to the following criteria. The results are shown as the total score of the three evaluators. 5: It has a very moisturizing effect. 4: Has a moisturizing effect. 3: Has some moisturizing effect. 2: It doesn't have much moisturizing effect. 1: No moisturizing effect.

[0046] (6) Long-lasting moisturizing effect: Three cosmetic expert evaluators applied 0.3 g of each skin care product to the back of their hand in a circular motion using their fingers for 40 seconds, and then performed a sensory evaluation of the moisturizing sensation after 8 hours according to the following criteria. The results are shown as the total score of the three evaluators. 5: The moisturizing effect is very long-lasting. 4: The moisturizing effect lasts. 3: The moisturizing effect lasts for some time. 2: The moisturizing effect does not last very long. 1: The moisturizing effect does not last.

[0047] (7)Advancing contact angle, receding contact angle: Using a fully automatic contact angle meter (Kyowa Interface Science Co., Ltd., DM-701), 1 μL of each skin cosmetic was dropped onto a PMMA substrate, and the advancing and receding contact angles (expansion and contraction method) were measured 30 times (0 to 5800 ms) at a measurement interval of 200 ms. The contact angle was analyzed using the tangent method, and the average value of 5 measurements was calculated. The advancing contact angle is the contact angle when a liquid is dispensed and the skin cosmetic spreads on a solid surface, and the smaller this value, the easier it is to spread and the sooner it begins to blend in. The receding contact angle is the contact angle when the liquid is absorbed and the skin cosmetic contracts, and the smaller this value, the easier it is to adhere to the solid surface and the finger feels gradually heavy.

[0048] (8) Viscosity: Measurement was carried out at 25°C using a vibration viscometer VISCOMATE VM-10A (manufactured by SEKONIC Corporation).

[0049] [Table 1]

[0050] *1 Polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) (5P.O.): Wilbride S-753 (manufactured by NOF Corporation), *2 Polyoxyethylene methyl glucoside (20E.O.): Macbiobride MG-20E (NOF Corporation), *3 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer solution (polymer content 5% by mass, water 95% by mass): LIPIDURE-PMB (NOF Corporation) *4 Polyethylene glycol 4000: PEG#4000 (NOF Corporation) *5 Polyethylene glycol 1000: PEG#1000 (NOF Corporation) *6 Polyoxyethylene hydrogenated castor oil (60E.O.): NIKKOL HCO-60 (manufactured by Nippon Surfactant Industries Co., Ltd., HLB: 14), *7 Dipropylene glycol: Dipropylene glycol FG (SK picglobal Co.)

[0051] Prescription examples 1-5 Skin cosmetics having the compositions shown in Tables 2 to 6 were produced in the same manner as in Examples 1 to 7. When xanthan gum was to be contained, the xanthan gum was uniformly dispersed in a portion of component (F) beforehand and then added. All of the obtained skin cosmetics have a penetrating feel, do not slip on the skin when applied, start to blend quickly, gradually make the fingers feel heavy, do not leave the skin sticky after application, and provide a moisturizing feel (a moist feeling) that lasts.

[0052] [Table 2]

[0053] [Table 3]

[0054] [Table 4]

[0055] [Table 5]

[0056] [Table 6]

Claims

1. The following components (A), (B), (C), and (D): (A) an alkylene oxide derivative, (B) a polymer or copolymer containing 2-methacryloyloxyethyl phosphorylcholine as a constituent monomer; (C) polyethylene glycol having a number average molecular weight of 1,800 to 40,000; (D) Water A skin cosmetic containing

2. 2. The skin cosmetic according to claim 1, which has a viscosity at 25°C of 1,000 mPa·s or less.

3. 3. The skin cosmetic according to claim 1, further comprising (E) a nonionic surfactant having an HLB of 10 to 20.

4. 3. The skin cosmetic according to claim 1, further comprising (F) a polyhydric alcohol other than components (A) and (C).

5. 3. The skin cosmetic according to claim 1, wherein the mass ratio (A) / (C) of component (A) to component (C) is 0.1 to 50.

6. 3. The skin cosmetic according to claim 1, wherein the mass ratio (B) / (C) of component (B) to component (C) is 0.001 to 0.5.

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