Skin cosmetics

Abstract

To provide a skin cosmetic that has excellent moisturizing effect, is hard to give stickiness, can impart smooth feeling, and allows these effects to continue even when wearing a mask, and furthermore, exhibits similar effects even when used as a cleaning cosmetic.SOLUTION: A skin cosmetic contains: (A) extract obtained from loquat (Eriobotrya japonica) leaves by 0.00005 to 0.05 mass%; (B) acid mucopolysaccharide by 0.0001 to 0.05 mass%; (C) a divalent to tetravalent polyhydric alcohol with a carbon number of 3 to 6 by 1 to 30 mass%; and (D) a copolymer represented by 2-methacryloyloxyethyl phosphorylcholine butyl methacrylate copolymer by 0.0005 to 0.5 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin cosmetic that has an excellent moisturizing effect, is less sticky, and can impart a smooth feeling, and these effects are maintained even when wearing a mask, and further, can obtain the same effects when used as a wipe-off cosmetic. [Background technology]

[0002] The skin has the important function of preventing moisture loss from the body and blocking external stimuli. To maintain the skin's natural functions, it is important to maintain a healthy state by maintaining an appropriate amount of moisture in the skin through skin care.

[0003] Skin care cosmetics contain a variety of moisturizing agents, and polyhydric alcohols, hyaluronic acid, and their analogues are known to be moisturizing ingredients with high water retention. However, skin care cosmetics containing a high content of hyaluronic acid can cause stickiness.

[0004] To solve this problem, Patent Document 1 proposes a skin cosmetic containing a phospholipid derivative, hydrolyzed hyaluronic acid, bilberry extract, a nonionic surfactant, and a specific copolymer to have a moisturizing effect while reducing stickiness. Patent Document 2 also proposes a skin cosmetic containing a specific arginine derivative and a water-soluble polymer compound. These cosmetic preparations have a moisturizing effect and also reduce stickiness, but are insufficient in terms of providing a smooth feel.

[0005] To solve this problem, Patent Document 3 proposes a lotion containing a specific alkylene oxide addition derivative, a polyhydric alcohol, and a specific copolymer. This lotion has the effect of imparting a smooth feel to the skin while suppressing stickiness.

[0006] On the other hand, in recent years, the number of opportunities to wear masks has increased, and the increased frequency of contact between the mask and the skin has led to rough and dry skin. Furthermore, the high humidity inside the mask can cause stickiness due to the secretion of sebum, which can reduce the moisturizing effect, suppress stickiness, and maintain a smooth feeling. The lotion described in Patent Document 3 also has the same problem.

[0007] Furthermore, in order to save time, there is a demand for cosmetics that can remove dirt such as sebum instead of washing the face and can also provide skin care at the same time. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-149624 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-012311 [Patent Document 3] Patent Publication No. 2021-100920 Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above circumstances, the present invention aims to provide a skin cosmetic that has an excellent moisturizing effect, is less sticky, and can impart a smooth feeling, and that maintains these effects even when wearing a mask, and that also provides similar effects when used as a wipe-off cosmetic. [Means for solving the problem]

[0010] The inventors conducted extensive research to solve the above problems and discovered that the above objectives could be achieved by using a composition combining an extract obtained from loquat leaves, acidic mucopolysaccharides, a specified polyhydric alcohol, and a specific copolymer as a skin cosmetic, thereby completing the present invention. That is, the skin cosmetic of the present invention is as follows.

[0011] A skin cosmetic containing the following components (A), (B), (C) and (D). (A) Extract obtained from loquat leaves: 0.0001~0.03 mass% (B) Acidic mucopolysaccharides: 0.0001 to 0.05% by mass (C) Di- to tetrahydric polyhydric alcohols having 3 to 6 carbon atoms: 1 to 30% by mass (D) A copolymer containing structural units represented by the following formulas (I) and (II): 0.0005 to 0.5% by mass [ka] (In the formula, R 1 Hame ethyl group.) [ka] (In the formula, R 2 Hame indicates a methyl group, and R 3 is the number of carbon atoms of 4 represents an alkyl group. [Effects of the Invention]

[0012] The skin cosmetic of the present invention has an excellent moisturizing effect, is less sticky, and can impart a smooth feeling, and these effects are maintained even when wearing a mask, and further has the same effect when used as a wipe-off cosmetic. In this specification, the term "wipe-off cosmetic" refers to a cosmetic such as a lotion that can be applied to a puff such as a cotton puff and wiped onto the skin to cleanse the skin. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described, but various modifications are possible without departing from the gist of the present invention, and the present invention is not limited to the following embodiment. In this specification, a numerical range defined using the symbol "to" is intended to include the numerical values ​​at both ends (upper and lower limits) of the symbol "to." For example, "2 to 5" means 2 or more and 5 or less. Furthermore, when a concentration or amount is specified, any higher concentration or amount can be associated with any lower concentration or amount. For example, the descriptions "2 to 10% by mass" and "preferably 4 to 8% by mass" also encompass the descriptions "2 to 4% by mass," "2 to 8% by mass," "4 to 10% by mass," and "8 to 10% by mass." Furthermore, "(meth)acrylic" refers to acrylic or methacrylic, and "(meth)acryloyl" refers to acryloyl or methacryloyl, respectively.

[0014] The skin cosmetic of the present invention contains (A) an extract obtained from loquat leaves, (B) an acidic mucopolysaccharide, (C) a dihydric to tetrahydric polyalcohol having 3 to 6 carbon atoms, and (D) a copolymer containing structural units represented by the following formulas (I) and (II): Each component will be described below.

[0015] [Component (A): Extract obtained from loquat leaves] Component (A) is an extract obtained from loquat leaves. The "loquat" used in the present invention refers to "Eriobotrya japonica" and is an extract extracted from its leaves. The loquat leaf extract of the present invention can be obtained by extracting loquat leaves, either whole or crushed, with an extraction solvent, but is not limited to this. These components are commercially available as cosmetic ingredients and are generally known to be rich in polyphenols such as tannins. Therefore, it is preferable to use an extract extracted from the leaves in the present invention, rather than an extract extracted from other parts of the loquat plant, such as the fruit or roots. The loquat leaf extract extracted by this method generally contains 0.1 to 3.0% by mass of pure loquat leaf.

[0016] In the present invention, examples of extraction solvents used for extracting loquat leaves include water and aqueous solvents. Examples of aqueous solvents include esters such as ethyl acetate; ketones such as acetone; ethers such as polyhydric alcohol alkyl ethers such as diethyl ether, tetrahydrofuran, and diethylene glycol ether; and alcohols such as lower alcohols and polyhydric alcohols. Among these, from the viewpoints of safety and extraction efficiency, water; lower alcohols such as methanol, ethanol, propanol, and isopropanol; and polyhydric alcohols such as propylene glycol, dipropylene glycol, 1,3-butylene glycol, and glycerin are preferred, with water, ethanol, and 1,3-butylene glycol being more preferred. In the present invention, one solvent selected from the above-mentioned extraction solvents may be used alone, or a mixed solvent of two or more solvents may be used, with a mixed solvent of water and 1,3-butylene glycol being more preferred. For example, when the extraction solvent is water, extraction can be performed using typically 100 to 2,000 parts by weight, preferably 200 to 1,000 parts by weight, per 100 parts by weight of loquat leaves. Similarly, when the extraction solvent is a lower alcohol, extraction can be performed using typically 100 to 5,000 parts by weight, preferably 500 to 2,000 parts by weight.

[0017] The extraction temperature is determined appropriately depending on the type of extraction solvent used. For example, when the extraction solvent is water, the extraction temperature is usually about 20 to 120°C, and when the extraction solvent is a lower alcohol, the extraction temperature is usually about 30 to 80°C. A common extraction method is used, for example, adding an extraction solvent to undried or dried loquat leaves, soaking them, optionally stirring, and then filtering to obtain an extract. Methods for drying loquat leaves include air drying, warm drying, and freeze drying. From the perspective of extraction efficiency, loquat leaves may be appropriately shredded. The extraction time (soaking time) is usually 1 hour or more, preferably 3 hours or more, and more preferably 5 hours or more. From the viewpoint of extraction efficiency, the upper limit of the extraction time is usually 10 hours or less, and preferably 8 hours or less. The number of times extraction is performed is not particularly limited, but it is preferable to perform extraction once with the above amount of water or aqueous solvent.

[0018] The obtained extract may be used as it is, or may be concentrated by distilling off the solvent, and if necessary, purified by treatment such as column chromatography or solvent fractionation, and further dried before use. To make the extract easier to handle, it may be diluted with water or a polyhydric alcohol such as glycerin or 1,3-butylene glycol. This extract may be commercially available.

[0019] The blending amount of component (A) is 0.00005 to 0.05% by mass, preferably 0.00008 to 0.04% by mass, and more preferably 0.0001 to 0.03% by mass, when the total mass of the skin cosmetic is 100% by mass. If the blending amount is too small, the smooth feeling, the durability when wearing a mask, and the effect when used as a wipe-off cosmetic may be reduced. On the other hand, if the blending amount is too large, the lack of stickiness may be reduced.

[0020] [Component (B): Acidic mucopolysaccharides] Component (B) is an acidic mucopolysaccharide. The "acidic mucopolysaccharide" used in the present invention is a component that is distributed in large amounts in connective tissue, cartilage, skin tissue, etc., has high water retention, and binds to collagen, which acts as a support for the extracellular matrix, helping to maintain the function and morphology of cells. In skin tissue, acidic mucopolysaccharides and collagen are present in large amounts in the dermis layer and are greatly involved in the water retention and elasticity of the skin. It is known that when the amount of these substances decreases due to aging, the skin loses its water retention and elasticity, causing rough skin and fine wrinkles.

[0021] Examples of the acidic mucopolysaccharides include hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan sulfate, keratan sulfate, heparin, and other acidic mucopolysaccharides; salts formed from acidic mucopolysaccharides and inorganic or organic alkalis; and acetylated acidic mucopolysaccharides. Inorganic salts of acidic mucopolysaccharides include alkali metal salts such as sodium salts and potassium salts, and organic salts include quaternary ammonium salts. Preferred salts are sodium salts and potassium salts. Preferred are hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate, or salts thereof, and more preferred are hyaluronic acid or salts thereof. Among these acidic mucopolysaccharides, one kind can be used alone, or two or more kinds can be used in combination. The acid mucopolysaccharides that can be used include commercially available products and prepared products.

[0022] The blending amount of component (B) is 0.0001 to 0.05% by mass, preferably 0.0005 to 0.04% by mass, and more preferably 0.001 to 0.03% by mass, when the total mass of the skin cosmetic is 100% by mass. If the blending amount is too small, the moisturizing feeling, the durability when wearing a mask, and the effect when used as a wipe-off cosmetic may be reduced. On the other hand, if the blending amount is too large, the lack of stickiness may be reduced.

[0023] [Component (C): Di- to tetrahydric polyhydric alcohol having 3 to 6 carbon atoms] Component (C) is a polyhydric alcohol having 3 to 6 carbon atoms and a valence of 2 to 4. Examples of such polyhydric alcohols include glycerin, pentylene glycol, 1,3-butylene glycol, erythritol, propylene glycol, 1,3-propanediol, dipropylene glycol, diglycerin, hexylene glycol, and isoprene glycol. Among these, glycerin, pentylene glycol, 1,3-butylene glycol, propylene glycol, 1,3-propanediol, and diglycerin are preferred, with pentylene glycol, 1,3-butylene glycol, and propylene glycol being more preferred. As component (C), one selected from the above polyhydric alcohols can be used alone, or two or more can be used in combination. When a solvent-diluted product diluted with a solvent corresponding to component (C) is used as component (A), the amount of component (C) may be reduced depending on the amount of solvent contained in the solvent-diluted product.

[0024] The blending amount of component (C) is 1 to 30% by mass, preferably 5 to 25% by mass, and more preferably 10 to 20% by mass, when the total mass of the skin cosmetic is 100% by mass. If the blending amount is too small, the moisturizing feeling and the effect when used as a wipe-off cosmetic may be reduced. On the other hand, if the blending amount is too large, the lack of stickiness may be reduced.

[0025] [Component (D): Copolymer] Component (D) is a copolymer containing structural units represented by the following formulas (I) and (II).

[0026] [ka]

[0027] In formula (I), R 1 represents a hydrogen atom or a methyl group.

[0028] [ka]

[0029] In formula (II), R 2 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 4 to 18 carbon atoms. R 3 The alkyl group represented by the formula (I) is a linear or branched alkyl group having 4 to 18 carbon atoms, and examples thereof include butyl, pentyl, hexyl, octyl, 2-ethylhexyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, etc. A linear alkyl group such as butyl, dodecyl, or octadecyl is preferred, and butyl or octadecyl is more preferred. In addition, R 3 If the number of carbon atoms in the alkyl group represented by R is less than 4, the moisturizing feeling at the applied site may decrease. 3 If the number of carbon atoms in the alkyl group represented by the formula (I) exceeds 18, it may be difficult to dissolve the copolymer in water or an aqueous solvent.

[0030] In the copolymer as component (D), the ratio of the content of the structural units based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the above formula (I) to the content of the structural units based on alkyl (meth)acrylate represented by the above formula (II) ([structural units based on 2-(meth)acryloyloxyethyl phosphorylcholine]:[structural units based on alkyl (meth)acrylate]) (n1:n2) is preferably 10:1 to 1:5, more preferably 7:1 to 1:4, and even more preferably 5:1 to 1:3, in molar ratio. If the ratio (n2 / n1) (molar ratio) of the content of the structural units based on alkyl (meth)acrylate to the content of the structural units based on 2-(meth)acryloyloxyethyl phosphorylcholine is less than 0.1, the moist feeling at the applied site may decrease. On the other hand, if the ratio exceeds 5, the water absorption of the copolymer may decrease.

[0031] The weight average molecular weight of the copolymer is usually 10,000 to 1,000,000, preferably 30,000 to 900,000, and more preferably 50,000 to 800,000. If the weight average molecular weight of the copolymer is too low, the moist feeling may not be obtained at the applied site, whereas if the weight average molecular weight of the copolymer is too high, handling may become difficult. The weight average molecular weight of the copolymer is measured by gel permeation chromatography (GPC) and is expressed as a molecular weight converted into polyethylene glycol.

[0032] The polymerization form of the copolymer is not particularly limited, and may be a random copolymer or a block copolymer, but is preferably a random copolymer.The copolymer is usually a binary copolymer consisting of a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine and a structural unit based on alkyl (meth)acrylate, but may also be a copolymer containing other structural units in addition to the structural units. Other structural units that may be contained in the copolymer can usually be appropriately selected from those that can be structural units of the copolymer, as long as they do not affect the effects of the present invention. The content of other structural units in the copolymer is 40 mol % or less, preferably 20 mol % or less, based on the total amount of structural units based on 2-(meth)acryloyloxyethyl phosphorylcholine and structural units based on alkyl (meth)acrylate.

[0033] The copolymer as component (D) can be produced by a known production method. For example, it can be produced by polymerizing a monomer mixture containing 2-(meth)acryloyloxyethyl phosphorylcholine and alkyl (meth)acrylate, and, if necessary, monomers corresponding to other structural units, in the presence of a radical polymerization initiator under an inert gas atmosphere such as nitrogen, by a known method such as solution polymerization. The content ratio of each monomer in this case may be set to a ratio corresponding to the desired content ratio of each structural unit in the copolymer. The copolymer may be one produced by the polymerization method described above, or a commercially available product may be used. Examples of such products include commercially available products in the form of a copolymer dispersion, such as "LIPIDURE (registered trademark)-B," "LIPIDURE (registered trademark)-PMB (Ph10)," and "LIPIDURE (registered trademark)-NR" (all manufactured by NOF Corporation). Component (D) may be one selected from various copolymers differing in the structural units, the content ratio of each structural unit, and the weight average molecular weight, or may be contained alone or in combination of two or more. The form of the copolymer when blended into the skin cosmetic of the present invention is not particularly limited, and may be in any form, such as a solid form such as a powder, or a liquid form such as a solution or dispersion.

[0034] The blending amount of component (D) is 0.0005 to 0.5% by mass, preferably 0.001 to 0.4% by mass, and more preferably 0.005 to 0.3% by mass, when the total mass of the skin cosmetic is taken as 100% by mass. If the blending amount is too small, the moisturizing feeling, non-sticky feeling, smooth feeling, and other effects when used as a wipe-off cosmetic may be reduced. On the other hand, if the blending amount is too large, the non-sticky feeling, smooth feeling, and other effects when used as a wipe-off cosmetic may be reduced.

[0035] The skin cosmetic of the present invention contains water such as purified water in addition to components (A) to (D). The water content is preferably 30 to 99% by mass, more preferably 35 to 90% by mass, and even more preferably 40 to 80% by mass, when the total mass of the skin cosmetic is taken as 100% by mass.

[0036] The skin cosmetic of the present invention may contain other ingredients in addition to the above-mentioned components (A) to (D) and water, provided that the effects of the present invention are not impaired. These other ingredients may include those commonly used in cosmetics, such as lower alcohols such as ethanol, diols such as propylene glycol, thickeners such as carboxyvinyl polymers, oils, sugars, surfactants, organic salts, inorganic salts, pH adjusters, chelating agents, antioxidants, disinfectants, blood flow promoters, anti-inflammatory agents, UV absorbers, UV scattering agents, vitamins, amino acids such as arginine, pigments, and fragrances, provided that the performance of the skin cosmetic of the present invention is not impaired. When the skin cosmetic of the present invention contains other ingredients, the content of these ingredients is preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less, when the total mass of the skin cosmetic is 100% by mass.

[0037] The formulation of the skin cosmetic of the present invention is not particularly limited as long as it contains water, and examples thereof include a solution, gel, emulsion, cream, lotion, foam, mist, etc. The skin cosmetic of the present invention can be produced by a conventional method depending on the formulation. [Example]

[0038] Hereinafter, the embodiments of the present invention will be described in more detail with reference to Examples and Comparative Examples. The blending amounts and compositions shown in Tables 1 and 2 and below are in mass % unless otherwise specified.

[0039] [Examples 1 to 6 and Comparative Examples 1 to 5] The skin cosmetics of Examples and Comparative Examples were prepared by adding each of the components in Tables 1 and 2 to purified water, mixing them uniformly, and the compositions of the common components in Tables 1 and 2 are shown in Table 3. The raw materials used in preparing the skin cosmetics of the Examples and Comparative Examples are as follows.

[0040] Component (A) Loquat leaf extract: Composition (loquat leaf extract 0.8%, 1,3-butylene glycol 49.6%, water 49.6%) Component (A') Bilberry leaf extract: Composition (bilberry leaf extract 0.2%, 1,3-butylene glycol 49.9%, water 49.9%)

[0041] Ingredient (B) Sodium hyaluronate: Composition (1% aqueous solution of sodium hyaluronate)

[0042] Ingredients (C) Glycerin: "RG-S" (NOF Corporation). Composition: 100% glycerin. Pentylene glycol: "Diol PD" (Kyushu Alcohol Kogyo Co., Ltd.). Composition: 100% pentylene glycol. 1,3-Butylene glycol: "1,3-Butylene glycol-P" (KH Neochem Co., Ltd.). Composition: 1,3-butylene glycol 100%

[0043] Ingredients (D) 2-Methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer solution: "LIPIDURE (registered trademark)-PMB (Ph10)" (manufactured by NOF Corporation). The weight-average molecular weight of the copolymer was approximately 600,000, and the structural unit based on 2-methacryloyloxyethyl phosphorylcholine (R in formula (I)) was 100%. 1 is a methyl group) and a structural unit based on butyl methacrylate (R in formula (II) 2 is a methyl group, R 3 The molar ratio of the content of alkyl groups (having 4 carbon atoms) is 4:1.

[0044] <Evaluation method> The panel consisted of 20 women in their 30s to 60s, and they conducted a sensory evaluation of the following five items: "moisturizing sensation," "non-stickiness," "smoothness," "effect duration when wearing a mask," and "effect duration when used as a wipe-off cosmetic."

[0045] (1) Moisturizing After washing the face, 1 g of each skin cosmetic preparation from the Examples and Comparative Examples was applied to the entire face, and the moisturizing feeling after 1 hour was scored according to the following evaluation criteria. The total score of the evaluation points from 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: It feels so soft and chewy that it sticks to your skin. 1 point: There is a slight feeling of firmness, as if the product is sticking to your skin. 0 points: I don't feel any softness that makes my hands stick to my skin. <Judgment criteria> ◎: Total score is 35 points or more 〇: Total score is 30 or more and 34 or less △: Total score is 29 points or less

[0046] (2) No sticky feeling After washing the face, 1 g of each skin cosmetic preparation from the Examples and Comparative Examples was applied to the entire face, and the lack of stickiness after 1 hour was scored according to the following evaluation criteria. The total score of the evaluation points from 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: No stickiness felt. 1 point: Not very sticky. 0 points: Very sticky feeling. <Judgment criteria> ◎: Total score is 35 points or more 〇: Total score is 30 or more and 34 or less △: Total score is 29 points or less

[0047] (3) Smoothness After washing the face, 1 g of each skin cosmetic preparation from the Examples and Comparative Examples was applied to the entire face, and the smooth feeling after 1 hour was scored according to the following evaluation criteria. The total score of the evaluation points from 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: Feels smooth. 1 point: Slightly smooth feeling. 0 points: No smooth feeling. <Judgment criteria> ◎: Total score is 35 points or more 〇: Total score is 30 or more and 34 or less △: Total score is 29 points or less

[0048] (4) Duration of effectiveness when wearing a mask After washing the face, 1 g of each skin cosmetic preparation from the Examples and Comparative Examples was applied to the entire face, and after wearing the mask for 1 hour, the moisturizing feeling, non-stickiness, and smooth feeling were scored according to the following evaluation criteria. The total score of the evaluation points from 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: The effect is felt to be long-lasting. 1 point: The effect seems to be somewhat persistent. 0 points: The effect does not seem to last. <Judgment criteria> ◎: Total score is 35 points or more 〇: Total score is 30 or more and 34 or less △: Total score is 29 points or less

[0049] (5) Durability of effect when used as a cosmetic wipe Instead of washing the face, 1 g of each skin cosmetic of the Examples and Comparative Examples was soaked into a cotton pad and wiped over the entire face. After wearing the mask for 1 hour, the moisturizing feeling, non-stickiness, and smooth feeling were scored according to the following evaluation criteria. The total score of the evaluation points of 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: The effect is felt to be long-lasting. 1 point: The effect seems to be somewhat persistent. 0 points: The effect does not seem to last. <Judgment criteria> ◎: Total score is 35 points or more 〇: Total score is 30 or more and 34 or less △: Total score is 29 points or less

[0050] [Table 1]

[0051] The content of ingredient (A) is indicated by the amount blended in the product. The number in parentheses indicates the amount of extract or extractive contained in the product. The content of ingredient (B) is indicated by the amount blended in the product. The number in parentheses indicates the amount of active ingredient contained in the product. The content of ingredient (C) is indicated by the amount of active ingredient contained in the product. The content of component (D) is shown as the amount blended in the product. The number in parentheses is the amount of copolymer in solid content contained in the product.

[0052] [Table 2]

[0053] [Table 3]

[0054] The evaluation results of the Examples are shown in Table 1, and the evaluation results of the Comparative Examples are shown in Table 2. For each evaluation item, a rating of "A" or "B" was deemed to be acceptable. As shown in Table 1, all of the skin cosmetics of Examples 1 to 6 had excellent moisturizing effects, were less sticky, and provided a smooth feeling, and these effects persisted even when wearing a mask. Furthermore, similar effects were obtained when used as a wipe-off cosmetic. In particular, the skin cosmetic of Example 1, which contained the preferred amounts of components (A) to (D), was rated as "Excellent" in all evaluation items.

[0055] In contrast, as shown in Table 2, none of the skin cosmetics of Comparative Examples 1 to 5 were rated as passing in all the evaluation items. That is, the skin cosmetic of Comparative Example 1, which did not contain component (A), was evaluated as having insufficient effect duration when wearing a mask and insufficient effect when used as a wipe-off cosmetic. The skin cosmetic of Comparative Example 2, which did not contain component (B), was evaluated as having insufficient effect duration when wearing a mask and insufficient effect when used as a wipe-off cosmetic. The skin cosmetic of Comparative Example 3, which did not contain component (C), was evaluated as having insufficient moisturizing feeling and effects when used as a wipe-off cosmetic. The skin cosmetic of Comparative Example 4, which did not contain component (D), was evaluated as being insufficient in terms of lack of stickiness, smoothness, and effectiveness when used as a wipe-off cosmetic. The skin cosmetic of Comparative Example 5, in which component (A) was replaced with bilberry leaf extract, was evaluated as having insufficient effect duration when wearing a mask and insufficient effect when used as a wipe-off cosmetic.

[0056] Next, formulation examples of the skin cosmetic of the present invention are shown. The following formulation examples also have excellent moisturizing effect, are less sticky, and impart a smooth feeling, and these effects are maintained even when wearing a mask. Furthermore, similar effects were obtained when used as a wipe-off cosmetic. Note that the blending amount of the extract in the following formulation examples is the blending amount of the extracted extract, and the blending amount of the polymer is the blending amount of the solid content.

[0057] [Formulation example] Gel-type skin care product (mass%) 1,3-butylene glycol: 6.5 Glycerin: 6 Pentylene glycol: 2 Propylene glycol: 0.2 Polyethylene glycol: 1 2-Methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer solution: 0.05 Dimethicone: 3 Carbomer: 0.5 Polysorbate 80:0.4 PEG-60 hydrogenated castor oil: 0.4 Macadamia seed oil: 0.3 Dimethicone crosspolymer: 0.1 Squalane: 0.1 EDTA-4Na: 0.03 Sodium hyaluronate: 0.01 Shiikuwasha peel extract: 0.004 Apple fruit extract: 0.002 Loquat leaf extract: 0.002 Centella asiatica extract: 0.002 Grape fruit extract: 0.001 (Hydroxyethyl acrylate / Sodium acryloyldimethyl taurate) copolymer: 0.15 Potassium hydroxide: 0.1 Methylgluceth-10:0.5 Ethylhexylglycerin: 0.2 Phenoxyethanol: 0.4 Fragrance: Appropriate amount Water: remaining amount

[0058] [Formulation example] Emulsion-type skin cosmetic (mass%) 1,3-butylene glycol: 0.2 Glycerin: 3.5 Pentylene glycol: 2 Propanediol: 2 Dimethicone: 2 Cetyl ethylhexanoate: 2 Sunflower seed oil: 2 Polyethylene glycol: 2 Triethylhexanoin: 2 Glyceryl stearate: 1 2-Methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer solution: 0.015 Grape fruit extract: 0.001 Apple fruit extract: 0.001 Shiikuwasha peel extract: 0.001 Loquat leaf extract: 0.001 Centella asiatica extract: 0.001 Sodium hyaluronate: 0.005 Allantoin: 0.1 Glycosyltrehalose: 0.2 Hydrogenated starch hydrolysate: 0.1 Behenyl alcohol: 0.6 Dimethicone crosspolymer: 0.05 PEG-75 stearate: 0.5 Polysorbate 80:0.5 Carbomer: 0.2 Tocopherol: 0.05 EDTA-4Na: 0.025 Ethylhexylglycerin: 0.1 Phenoxyethanol: 0.4 Fragrance: Appropriate amount Water: remaining amount [Industrial Applicability]

[0059] The skin cosmetic of the present invention has excellent moisturizing effects, is less sticky, and can impart a smooth feeling, and these effects are maintained even when wearing a mask.Furthermore, similar effects can be obtained when used as a wipe-off cosmetic, so it is preferable to apply it to skin, especially facial skin.

Claims

[Claim 1] A skin cosmetic composition containing the following components (A), (B), (C) and (D): (A) Extract obtained from loquat leaves: 0.0001 to 0.03% by mass (B) Acidic mucopolysaccharides: 0.0001 to 0.05% by mass (C) Dihydric to tetrahydric polyalcohols having 3 to 6 carbon atoms: 1 to 30% by mass (D) A copolymer containing structural units represented by the following formulas (I) and (II): 0.0005 to 0.5% by mass 【Chemistry 1】 (In the formula, R １ indicates a methyl group.) 【Chemistry 2】 (In the formula, R ２ represents a methyl group, and R ３ represents an alkyl group having 4 carbon atoms.

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