Skin cosmetics

Abstract

This skin cosmetic contains a high concentration of ascorbic acid derivatives, offers excellent moisturizing effects, is non-greasy, maintains a secure fit even in sweaty environments such as summer, and is highly usable even after long-term storage. [Solution] A skin cosmetic containing 10-30% by mass of component (A), 0.05-0.5% by mass of component (B), 0.1-10% by mass of component (C), 0.2-1.5% by mass of component (D), and water. (A) Ascorbic acid derivatives (B) Thickening polysaccharides (C) Alkylene oxide derivative of formula (1) Z-[O(EO)a-(PO)b-(BO)cH]x...(1) (Z is a residue from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups. x is an integer from 1 to 4. 0 ≤ a ≤ 100 (average number of moles of oxyethylene groups added). 0 ≤ b ≤ 60 (average number of moles of oxypropylene groups added). 0 ≤ c ≤ 5 (average number of moles of oxybutylene groups added)) (D) Acrylic acid polymer

Description

Technical Field

[0001] The present invention relates to a skin cosmetic containing an ascorbic acid derivative.

Background Art

[0002] In recent years, skin care cosmetics are required not only to have a moisturizing effect but also various beauty effects and added values for the skin, and many products with a high content of beauty ingredients have been launched. Among such beauty ingredients, ascorbic acid is a beauty ingredient having an antioxidant effect, a collagen production promoting effect, an excellent whitening effect, etc., and has a high recognition among consumers. However, ascorbic acid has the disadvantage of being unstable to light and heat and being easily oxidized and decomposed. Therefore, although various ascorbic acid derivatives with enhanced stability of ascorbic acid have been developed, since ascorbic acid derivatives are ionic compounds, there is a risk of causing a decrease in the formulation viscosity. Therefore, the viscosity of cosmetics containing a high content of ascorbic acid derivatives significantly decreases over time, and it is likely to spill when picked up by hand, making it difficult to apply to the skin, and there was a problem in usability. Furthermore, there was also a problem that cosmetics containing a high content of ascorbic acid derivatives tend to feel sticky.

[0003] Also, in products with a high content of beauty ingredients, it is considered that the satisfaction can be increased and the purchasing desire of consumers can be enhanced by providing a feeling of use that allows the user to feel the effect. For example, a feeling of adhesion is a feeling of use that evokes a high sense of effect. However, after taking a bath or on sweaty skin in summer, the cosmetic flows away together with sweat and sebum, and a sufficient feeling of adhesion cannot be obtained, and the sense of effect may be weakened.

[0004] As a technology to solve these problems, Patent Document 1 discloses a gel-like emulsion composition containing an ascorbic acid derivative, a specific polymer, a polysaccharide, a nonionic surfactant, and an oily component. This composition is described as having high viscosity, being non-sticky, and having excellent storage stability despite containing a high concentration of ascorbic acid derivatives. However, this composition not only lacks the moisturizing effect fundamentally required for skincare cosmetics in general, but also fails to provide sufficient adhesion.

[0005] Patent Document 2 discloses a transparent cosmetic composition containing an oligomer ester, ascorbic acid or a water-soluble derivative thereof, and a polyalkylene glycol. This cosmetic composition is described as having excellent high and low temperature stability, sustained moisturizing effect after application, and being non-sticky. However, this cosmetic composition lacked sufficient adhesion.

[0006] Patent Document 3 discloses a skin emulsifying composition containing atelocollagen and / or hydrolyzed collagen, polyoxyethylene sorbitan beeswax, N-acyl glutamate, and a fatty acid ester-type nonionic surfactant. This composition is described as providing a fresh, moisturized, and elastic skin condition by forming a uniform film without stickiness or thickness after application, thereby enhancing adhesion to the skin, and providing a long-lasting moisturizing effect. However, this composition did not adhere well to sweaty skin. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2023-174992 [Patent Document 2] Japanese Patent Publication No. 2017-081879 [Patent Document 3] Japanese Patent Publication No. 2008-74784 [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to provide a skin cosmetic that contains a high concentration of ascorbic acid derivatives, has excellent moisturizing effects, is non-sticky, maintains a feeling of adhesion even in environments where sweating is common, such as in summer, and has excellent usability even after long-term storage. [Means for solving the problem]

[0009] In order to solve the above problems, the present inventors conducted diligent research and found that the above problems can be solved by combining an ascorbic acid derivative, a thickening polysaccharide, a predetermined alkylene oxide derivative, and an acrylic acid-based polymer in specific mass ratios, thus completing the present invention.

[0010] In other words, the present invention is a skin cosmetic containing 10 to 30% by mass of component (A), 0.05 to 0.5% by mass of component (B), 0.1 to 10% by mass of component (C), 0.2 to 1.5% by mass of component (D), and water. (A) Ascorbic acid derivative (B) Thickening polysaccharides (C) Alkylene oxide derivative represented by the following formula (1) Z-[O(EO)a-(PO)b-(BO)cH]x...(1) (In formula (1), Z is a residue obtained by removing all of the hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups.) x represents an integer between 1 and 4. EO stands for oxyethylene group. PO is an oxypropylene group. BO is an oxybutylene group. a is the average number of moles of EO added, where 0 ≤ a ≤ 100; b is the average number of moles of PO added, where 0 ≤ b ≤ 60; and c is the average number of moles of BO added, where 0 ≤ c ≤ 5. However, a, b, and c are not all zero simultaneously. When neither a nor b is zero, the ratio (a / b) is between 1 / 5 and 7 / 1. (D) Acrylic acid polymer [Effects of the Invention]

[0011] The skin cosmetic of the present invention contains a high concentration of ascorbic acid derivatives, which allows for expected cosmetic effects, excellent moisturizing properties, non-greasy texture, maintains a secure fit even in sweaty environments such as summer, and offers excellent usability after long-term storage. [Modes for carrying out the invention]

[0012] The embodiments of the present invention will be described below, but the present invention is not limited to the embodiments described herein and can be modified in various ways without departing from the spirit of the invention. In this specification, numerical ranges defined using the symbol "~" include the numbers at both ends (upper and lower limits) of "~". For example, "2~5" means 2 or greater and 5 or less.

[0013] <Skin cosmetics> The skin cosmetic of the present invention (hereinafter also simply referred to as "cosmetic") contains component (A), component (B), component (C), component (D), and water. Each component will be described below.

[0014] [Component (A): Ascorbic acid derivative] Component (A) used in the present invention is an ascorbic acid derivative. Examples of ascorbic acid derivatives include 2-O-ethyl ascorbic acid, 3-O-ethyl ascorbic acid, L-ascorbic acid-2-glucoside, L-ascorbyl dipalmitate, glyceryl ascorbic acids, and their salts. Among these, glyceryl ascorbic acids and their salts are preferred, and glyceryl ascorbic acids are more preferred. Examples of elements that form counterions in the salt include sodium, potassium, magnesium, and calcium.

[0015] Examples of glyceryl ascorbic acid derivatives include glyceryl ascorbic acid, diglyceryl ascorbic acid, and alkylglyceryl ascorbic acid. Among these, diglyceryl ascorbic acid and alkylglyceryl ascorbic acid are preferred, and diglyceryl ascorbic acid is more preferred. Examples of glyceryl ascorbic acid include 2-glyceryl ascorbic acid and 3-glyceryl ascorbic acid. Examples of diglyceryl ascorbic acid include 2,3-diglyceryl ascorbic acid, with 2,3-diglyceryl ascorbic acid being preferred. Examples of alkyl glyceryl ascorbic acid include hexyl-3-glyceryl ascorbic acid and myristyl-3-glyceryl ascorbic acid, among which hexyl-3-glyceryl ascorbic acid is preferred. One kind selected from these ascorbic acid derivatives may be used alone, or two or more kinds may be used in combination.

[0016] The content of component (A) has a lower limit of 10% by mass, preferably 11% by mass, more preferably 12% by mass, and an upper limit of 30% by mass, preferably 25% by mass, more preferably 20% by mass, based on the total amount of the cosmetic (100% by mass, the same hereinafter). Examples of the content range of component (A) include, for example, 10 to 30% by mass, preferably 11 to 25% by mass, more preferably 12 to 20% by mass. If the content of component (A) is too low, a sufficient moisturizing effect may not be obtained. If the content of component (A) is too high, stickiness may occur or the usability after long-term storage may decrease.

[0017] 〔Component (B): Thickening polysaccharide〕 Component (B) used in the present invention is a thickening polysaccharide. The thickening polysaccharide is a water-soluble polysaccharide composed of a plurality of sugars, and is not particularly limited as long as it is a polysaccharide that can increase the viscosity of the cosmetic by dissolving in water. Specifically, gum arabic, guar gum, quince seed gum, agar, xanthan gum, pullulan, gellan gum, etc. can be mentioned. One kind selected from these thickening polysaccharides may be used alone, or two or more kinds may be used in combination. Among these thickening polysaccharides, xanthan gum and gellan gum are preferable from the viewpoint of enhancing stability, and it is more preferable to use xanthan gum and gellan gum in combination. When xanthan gum and gellan gum are used in combination, the ratio of xanthan gum:gellan gum is preferably 4:1 to 1:3, more preferably 3:1 to 1:2 in terms of mass ratio.

[0018] The content of component (B) has a lower limit value of 0.05% by mass, preferably 0.1% by mass, more preferably 0.15% by mass, and an upper limit value of 0.5% by mass, preferably 0.4% by mass, more preferably 0.3% by mass with respect to the total amount of the cosmetic. Examples of the range of the content of component (B) include 0.05 to 0.5% by mass, preferably 0.1 to 0.4% by mass, more preferably 0.15 to 0.3% by mass. If the content of component (B) is too small, the usability after long-term storage may decrease or sufficient adhesion may not be obtained. If the content of component (B) is too large, stickiness may occur.

[0019] [Component (C): Alkylene Oxide Derivative] <​​​​​​​​The lower limit of the number of carbon atoms in Z is 1, preferably 2, and the upper limit of the number of carbon atoms is 7, preferably 6, and more preferably 4. Examples of the range of carbon atoms include 1 to 7, preferably 1 to 6, and more preferably 2 to 4. The lower limit of the number of hydroxyl groups in Z is 1, the upper limit is 4, preferably 3, more preferably 2, and even more preferably 1. The range of the number of hydroxyl groups is, for example, 1 to 4, preferably 1 to 3, and more preferably 1 to 2. Examples of Z include methyl glucoside residues (residues obtained by removing all hydroxyl groups from a compound having 7 carbon atoms and 4 hydroxyl groups), glycerol residues (residues obtained by removing all hydroxyl groups from a compound having 3 carbon atoms and 3 hydroxyl groups), and butanol residues (residues obtained by removing all hydroxyl groups from a compound having 4 carbon atoms and 1 hydroxyl group).

[0021] x represents an integer from 1 to 4. EO is an oxyethylene group. PO is an oxypropylene group, including, for example, an oxytrimethylene group. Preferably, it is an oxypropylene group. BO is an oxybutylene group, including, for example, a 1,2-oxybutylene group, an oxyisobutylene group, an oxytetramethylene group, an oxyt-butylene group, etc. Preferably, it is a 1,2-oxybutylene group.

[0022] a is the average number of moles of EO added, with a lower limit of 0 and an upper limit of 100, preferably 30, and more preferably 15. Examples of the range of a include 0 ≤ a ≤ 100, preferably 0 ≤ a ≤ 30, and more preferably 0 ≤ a ≤ 15. b is the average number of moles of PO added, with a lower limit of 0 and an upper limit of 60, preferably 20, and more preferably 10. Examples of the range of b include 0 ≤ b ≤ 60, preferably 0 ≤ b ≤ 20, and more preferably 0 ≤ b ≤ 10. c is the average number of moles added to BO, with a lower limit of 0 and an upper limit of 5, preferably 4, and more preferably 3. Examples of the range of c include 0 ≤ c ≤ 5, preferably 0 ≤ c ≤ 4, and more preferably 0 ≤ c ≤ 3. However, a, b, and c are not all zero at the same time. When neither a nor b is zero, the lower limit of the ratio (a / b) is 1 / 5, preferably 1 / 3, more preferably 1 / 2, and the upper limit is 7 / 1, preferably 5 / 1, more preferably 4 / 1. Examples of the range of the ratio (a / b) include 1 / 5 to 7 / 1, preferably 1 / 3 to 5 / 1, and more preferably 1 / 2 to 4 / 1. EO, PO, and BO may be added randomly or in blocks, but it is preferable that they are added randomly or that random and block portions are mixed, and it is more preferable that random and block portions are mixed.

[0023] As the alkylene oxide derivative mentioned above, one prepared according to a known manufacturing method can be used, or a commercially available product for use in cosmetics, quasi-drugs, etc. can also be used. Examples of the alkylene oxide derivative products mentioned above include "Macbiobride® MG-10E" (Z is a methyl glucoside residue, x is 4, a is 2.5, b is 0, c is 0), "Macbiobride® MG-20P" (Z is a methyl glucoside residue, x is 4, a is 0, b is 5, c is 0), "WILBRIDE® S-753" (Z is a glycerin residue, x is 3, a is 2.7, b is 1.7, c is 1, a / b is 1.6), and "WILBRIDE® BS-03" (Z is a butanol residue, x is 1, a is 10, b is 7, c is 0, a / b is 1.4), (all manufactured by NOF Corporation). Alkylene oxide derivatives may be used individually or in combination of two or more.

[0024] The content of component (C) has a lower limit of 0.1% by mass, preferably 0.5% by mass, more preferably 0.8% by mass, and an upper limit of 10% by mass, preferably 8% by mass, more preferably 6% by mass, relative to the total amount of cosmetic. Examples of the range of component (C) content include 0.1 to 10% by mass, preferably 0.5 to 8% by mass, and more preferably 0.8 to 6% by mass. If the content of component (C) is too low, stickiness may occur or sufficient moisturizing effect may not be obtained, and if the content of component (C) is too high, sufficient adhesion may not be obtained.

[0025] [Component (D): Acrylic acid polymer] The component (D) used in the present invention is an acrylic acid polymer, and one type of acrylic acid polymer may be used alone as component (D), or two or more types may be used in combination. Examples of acrylic acid-based polymers include poly(meth)acrylic acid and (meth)acrylic acid-(meth)acrylate alkyl copolymers. Of these, (meth)acrylic acid-(meth)acrylate alkyl copolymers are preferred because they suppress the deterioration of usability after long-term storage and provide a sense of adhesion. Note that (meth)acrylic acid refers to either acrylic acid or methacrylic acid.

[0026] Poly(meth)acrylic acid may be a polymer obtained by polymerizing acrylic acid and / or methacrylic acid as constituent monomers, but a carboxyvinyl polymer (cosmetic name: carbomer), which is a crosslinked polyacrylic acid obtained by crosslinking the polymer with an allyl compound, is preferred. As carbomers, commercially available products such as Carbopol Ultrez 10 Polymer, Carbopol 940 (both manufactured by Lubrizol Nippon Co., Ltd.), and AQUPEC® HV-505E (manufactured by Sumitomo Seika Co., Ltd.) can be used.

[0027] The (meth)acrylic acid / (meth)acrylate alkyl copolymer is a copolymer of (meth)acrylic acid and (meth)acrylate alkyl, and the number of carbon atoms in the alkyl group in (meth)acrylate alkyl is preferably 1 to 30, and more preferably 8 to 30. Of these, the acrylic acid / methacrylate alkyl copolymer is preferred, the acrylic acid / methacrylate C10-30 alkyl copolymer (cosmetic labeling name: (Acrylates / methacrylate (C10-30)) copolymer) is more preferred, and the alkyl-modified carboxyvinyl polymer (cosmetic labeling name: (Acrylates / methacrylate (C10-30)) crosspolymer) having a structure in which some or all of the carboxyl groups of the above carbomer are esterified with an alcohol compound having an alkyl group with about 10 to 30 carbon atoms is even more preferred. As the (acrylates / alkyl acrylate (C10-30)) crosspolymer, commercially available products such as Carbopol Ultrez 21 Polymer, Carbopol ETD2020 (both manufactured by Lubrizol Nippon Co., Ltd.), AQUPEC® SER W-300C, and AQUPEC® HV-801ERK (both manufactured by Sumitomo Seika Co., Ltd.) can be used.

[0028] The content of component (D) is, with a lower limit of 0.2% by mass, preferably 0.3% by mass, more preferably 0.4% by mass, and an upper limit of 1.5% by mass, preferably 1.3% by mass, more preferably 1% by mass, relative to the total amount of cosmetic. Examples of the range of component (D) content include 0.2 to 1.5% by mass, preferably 0.3 to 1.3% by mass, and more preferably 0.4 to 1% by mass. If the content of component (D) is too low, the adhesion may be insufficient or the usability after long-term storage may decrease, and if the content of component (D) is too high, stickiness may occur.

[0029] The ratio of the content of component (A) to the sum of the contents of components (B) and (D) [(A) / ((B)+(D))] is preferably 8 at the lower limit, more preferably 10, and even more preferably 12, and preferably 30, more preferably 24, and even more preferably 18 at the upper limit, from the viewpoint of suppressing the deterioration of usability after long-term storage and from the viewpoint of improving adhesion. Examples of the range of the ratio [(A) / ((B)+(D))] include preferably 8 to 30, more preferably 10 to 24, and even more preferably 12 to 18.

[0030] 〔water〕 The cosmetic composition of the present invention contains at least water in addition to the above-mentioned components (A) to (D). Examples of water include purified water, ion-exchanged water, distilled water, RO water, tap water, and industrial water. The water content, relative to the total amount of the cosmetic, has a lower limit of preferably 50% by mass, more preferably 55% by mass, and even more preferably 60% by mass, and an upper limit of preferably 85% by mass, more preferably 82% by mass, and even more preferably 80% by mass. Examples of the range of water content include preferably 50-85% by mass, more preferably 55-82% by mass, and even more preferably 60-80% by mass. If the water content is too low, stickiness may occur, and if the water content is too high, sufficient moisturizing effect and adhesion may not be obtained.

[0031] [Other additives] In addition to the above-mentioned components, the skin cosmetic composition of the present invention may optionally contain other additives commonly used in cosmetics and quasi-drugs, as long as they do not impair the effects of the present invention. For example, examples of additives commonly used in cosmetics include humectants, pH adjusters, antioxidants, chelating agents, dyes, fragrances, and pigments. These additives may be used individually or in combination of two or more, as needed. The content of the above-mentioned additives can be set according to the amount normally used in cosmetics, depending on the purpose, but the lower limit is preferably 0% by mass, more preferably 1% by mass, and even more preferably 5% by mass, relative to the total amount of the cosmetic, and the upper limit is preferably 30% by mass, more preferably 25% by mass, and even more preferably 20% by mass. Examples of the range of content of the additives include preferably 30% by mass or less, more preferably 1 to 25% by mass, and even more preferably 5 to 20% by mass.

[0032] The skin cosmetic composition of the present invention can be in the form of a viscous liquid, emulsion, cream, gel, or other dosage form. Examples of product forms include emulsion, cream, all-in-one gel, serum, makeup base, sunscreen, and the like.

[0033] The skin cosmetic composition of the present invention can be prepared by various methods suitable for the preparation of skin cosmetics. For example, a thickening polysaccharide as component (B) and an acrylic acid polymer as component (D) can be mixed in water, heated to mix uniformly, and then cooled while stirring until it reaches a temperature near room temperature. Furthermore, an ascorbic acid derivative as component (A) and an alkylene oxide derivative as component (C) can be added and mixed to produce the skin cosmetic composition of the present invention. [Examples]

[0034] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited in any way to these examples.

[0035] <Examples 1-11, Comparative Examples 1-8> Skin cosmetics with the compositions shown in Table 1 (Examples 1-11) and Table 2 (Comparative Examples 1-8) were prepared by known methods, and the obtained skin cosmetics were evaluated by the following method. The common additives in Tables 1 and 2 are the nine components shown in Table 3. In Tables 1 to 3, the values ​​for each component indicate the content (mass %) relative to the total amount of skin cosmetic. The following ingredients were used as raw materials.

[0036] Ingredient (A): 2,3-Diglyceryl ascorbate ("Amitose® DGA" (manufactured by Seiwa Kasei Co., Ltd.)) Ingredient (B): Xanthan gum ("Grinstead® Xanthan Clear-80" (manufactured by Danisco Japan Co., Ltd.)) Gellan gum ("Kelcogel® HM" (manufactured by MP Gokyo Food & Chemical Co., Ltd.)) Ingredients (C): PPG-7 Buteth-10 ("WILBRIDE® BS-03" (manufactured by NOF Corporation)) Ingredient (D): (Acrylates / C10-30 Alkyl Acrylate) Crosspolymer ("AQUPEC® SER W-300C" (manufactured by Sumitomo Seika Co., Ltd.)) Carbomer ("Carbopol Ultrez 10" (manufactured by Lubrizol Japan Co., Ltd.))

[0037] [Evaluation items and evaluation criteria] For each of the following items (1) to (3), multiple panelists provided evaluations, and the sum of the evaluation scores from each panelist was used to determine the following four-level rating from "◎" to "×". "◎" and "○" were judged as passing, while "△" and "×" were judged as failing. Furthermore, each panelist conducting the following evaluations was trained in a preliminary evaluation test conducted prior to the main evaluation test to ensure that their evaluation levels corresponding to each score were roughly consistent, thus preventing any discrepancies in evaluation criteria among the panelists. (Four-level rating based on total score) ◎: Total score of 30 points or more ○: Total score of 20 points or more, but less than 30 points △: Total score is 10 points or more, but less than 20 points. ×: Total score is less than 10 points

[0038] (1) Moisturizing effect Twenty women (ages 24-55) served as panelists. After washing their faces, they applied cosmetics, and the moisturizing effect of their skin after application was scored according to the following evaluation criteria. The sum of the scores from the 20 panelists was calculated, and if the total score was 20 points or higher, it was determined that sufficient moisturizing effect was achieved. 2 points: I felt my skin was sufficiently moisturized. 1 point: I felt that my skin was slightly lacking in moisture. 0 points: I felt my skin lacked moisture.

[0039] (2) Non-sticky Twenty women (ages 24-55) served as panelists. After washing their faces, they applied cosmetics and scored the degree of stickiness after application according to the following evaluation criteria. The sum of the scores from the 20 panelists was calculated, and if the total score was 20 points or higher, the product was judged to be non-sticky. 2 points: I didn't feel any stickiness. 1 point: I felt it was slightly sticky. 0 points: I felt it was sticky.

[0040] (3) Close contact with sweaty skin Twenty women (ages 24-55) served as panelists. After washing their faces, they applied cosmetics and waited in a room with a temperature of 30°C and humidity of 60%. After 30 minutes, the degree of adhesion was scored according to the following evaluation criteria. The sum of the scores from the 20 panelists was calculated, and if the total score was 20 points or higher, it was judged that the product adhered well even to sweaty skin. 2 points: I felt it had a snug fit. 1 point: I felt it was slightly tight-fitting. 0 points: I didn't feel any sense of closeness.

[0041] (4) Resistance to dripping after long-term storage (usability) The cosmetic product was filled into a container and stored in a 40°C constant temperature bath for one month. After that, the product was returned to 20°C, and its resistance to dripping when applied to the face was evaluated according to the following criteria. ◎: The cosmetics did not drip from my hands. ○: A small amount of cosmetic product dripped from my hand. ×: Cosmetics dripped from my hand.

[0042] [Table 1]

[0043] [Table 2]

[0044] [Table 3]

[0045] The skin cosmetics in Examples 1 to 11 all exhibited good moisturizing effects, non-greasy texture, good adhesion to sweaty skin, and ease of use.

[0046] On the other hand, in Comparative Example 1, where the content of component (A) was too high, the usability was poor, it felt sticky, and the adhesion was insufficient. In Comparative Example 2, where the amount of ingredient (A) was too low, both the moisturizing effect and the sense of adhesion were inferior. In Comparative Example 3, where the amount of ingredient (B) was too high, the sticky feeling was strong. Comparative Example 4, which did not contain component (B), had poor usability and insufficient adhesion. In Comparative Example 5, where the content of component (C) was too high, the adhesion was insufficient. Comparative Example 6, which did not contain ingredient (C), had insufficient moisturizing effect and a strong sticky feeling. In Comparative Example 7, where the content of component (D) was too high, the product felt very sticky and had poor adhesion. Comparative Example 8, which did not contain ingredient (D), showed inferior adhesion and ease of use.

[0047] Next, an example of a formulation of the skin cosmetic of the present invention (Formulation Example 1) is shown. This formulation example of the skin cosmetic also exhibited good moisturizing effect, non-stickiness, good adhesion to sweaty skin, and ease of use.

[0048] [Table 4]

Claims

[Claim 1] A skin cosmetic containing 10 to 30% by mass of the following ingredient (A), 0.05 to 0.5% by mass of ingredient (B), 0.1 to 10% by mass of ingredient (C), 0.2 to 1.5% by mass of ingredient (D), and water. (A) Ascorbic acid derivatives (B) Thickening polysaccharides (C) Alkylene oxide derivative represented by the following formula (1) Z-[O(EO)a-(PO)b-(BO)c-H]x...(1) (In formula (1), Z is a residue obtained by removing all of the hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups.) x represents an integer between 1 and 4. EO stands for oxyethylene group. PO is an oxypropylene group. BO is an oxybutylene group. a is the average number of moles of EO added, where 0 ≤ a ≤ 100; b is the average number of moles of PO added, where 0 ≤ b ≤ 60; and c is the average number of moles of BO added, where 0 ≤ c ≤ 5. However, a, b, and c are not all zero simultaneously. When neither a nor b is zero, the ratio (a / b) is between 1 / 5 and 7 / 1. (D) Acrylic acid polymer

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