Skin cosmetic

Abstract

To provide a skin cosmetic capable of giving a refreshing feeling by impregnating cotton or the like with the cosmetic when skin shininess is generated and removing the shininess by removing excess sebum, which is a cosmetic capable of giving gloss and an elastic feeling to the skin after application and also suppressing generation of skin shininess and maintaining the effect for a long time.SOLUTION: There is provided a skin cosmetic containing 0.1 to 3 mass% of an alkylene oxide derivative represented by the following formula (1), 5 to 30 mass% of a dihydric alcohol having 3 to 6 carbon atoms and 0.01 to 0.4 mass% of 2-ethylhexyl glyceryl ether. [Symbols in the formula are as described in the specification.]SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cosmetic that can suppress the occurrence of shine and remove shine. [Background technology]

[0002] In order to make skin look healthy and bright, it is important to maintain a glossy and supple skin. When the moisture content of the skin decreases and the skin becomes dry, the gloss and suppleness are lost, causing dullness of the skin. In order to prevent the skin from drying and to maintain the gloss and suppleness, cosmetics containing moisturizers such as polyhydric alcohols and oils are generally used. Such cosmetics are required to have the effect of imparting gloss and suppleness, while also providing a refreshing finish without stickiness. However, when a sufficient amount of moisturizer or oil is added to give the skin a glossy and supple feel, stickiness may occur and a refreshing feel may not be obtained. Therefore, a cosmetic that does not impair any of the gloss, suppleness, and refreshing feel is required.

[0003] Moreover, skin greasiness is one of the most common skin concerns and problems. Shininess occurs when sebum is secreted excessively and light is reflected by the oil in the sebum. Sebum, which causes greasiness, is secreted in large amounts when the skin is dry or in situations where sweating is likely to occur, such as in summer or after exercise. Various cosmetics are used to suppress greasiness caused by sebum. Many cosmetics such as makeup bases suppress shine by blending porous inorganic powder such as silica as an oil absorbent. Patent Document 1 describes a skin cosmetic that has elasticity while suppressing stickiness and shine, which contains one or more selected from silica and clay minerals together with specific compounds such as bisstearyl polyethylene glycol / polypropylene glycol-8 / 6 (methylene diphenyl diisocyanate / PEG-400) copolymer. However, cosmetics that suppress shine using oil-absorbing powder may lose the skin's luster and firmness due to the powder remaining on the skin after use.

[0004] In addition to the method using oil-absorbing inorganic powder, other possible means for suppressing the occurrence of shine include preventing dryness of the skin by moisturizing with cosmetics and inhibiting light reflection caused by secreted sebum, and various further studies are being conducted. For example, Patent Document 2 describes a cosmetic composition that contains tris(hydroxymethyl)aminomethane, a specific water-insoluble polymer, and a polyhydric alcohol as a skin cosmetic that suppresses the occurrence of shine caused by sebum for a long period of time and improves skin desquamation. However, the cosmetic composition described in Patent Document 2 cannot remove shine that has already occurred.

[0005] For skin that is already shiny, it is necessary to remove excess sebum, which is the cause of shine. In order to suppress shine in situations where sebum is easily secreted in a short period of time, such as during the summer when temperatures and humidity are high, or after exercise or after a bath, it is necessary to remove the sebum that causes shine and at the same time apply ingredients that suppress shine to the skin. Wipe-off cosmetics have been attracting attention as cosmetics capable of removing sebum stains. Wipe-off cosmetics are formulations in which the cosmetic is impregnated into cotton or the like and used to wipe the skin. They are capable of removing sebum stains and keratin, and are characterized by a refreshing finish. In Patent Document 3, a study is carried out on enhancing the sebum removing effect by blending a specific surfactant and ethanol in a wipe cosmetic, and a wipe sheet is proposed in which a nonwoven fabric having a rayon content of 80% by weight or more is impregnated with an aqueous composition containing a nonionic surfactant with an HLB value of 11 to 15 and ethanol. However, although the wipe sheet described in Patent Document 3 has an excellent sebum removing effect, it does not have a sustained effect of suppressing shine. In addition, since sebum is removed by ethanol, the luster of the skin may be impaired.

[0006] That is, conventional skin cosmetics have a problem in that they are not formulated to simultaneously suppress shine and remove shine. Also, conventional wipe-off cosmetics capable of removing sebum have a problem in that it is difficult to achieve both a refreshing feeling and a lustrous skin. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-090446 A [Patent Document 2] JP 2013-166746 A [Patent Document 3] JP 2015-110550 A Summary of the Invention [Problem to be solved by the invention]

[0008] In view of the above problems, the present invention aims to provide a skin cosmetic that can impart luster and a bouncy feel to the skin after application, and further suppress the occurrence of skin greasiness, with the effect lasting for a long time, and that, when the skin is greased, can be impregnated with cotton or the like and wiped off, thereby imparting a good refreshing feel, removing excess sebum, and eliminating the greasiness. [Means for solving the problem]

[0009] The present inventors conducted intensive research in light of the above problems and found that a skin cosmetic composition containing a combination of predetermined amounts of (A) an alkylene oxide derivative represented by the following formula (1), (B) a dihydric alcohol having 3 to 6 carbon atoms, and (C) 2-ethylhexyl glyceryl ether can impart a glossy and bouncy feel after application, inhibit the occurrence of skin greasiness, and maintain these effects for a long period of time. When skin greasiness occurs, impregnating cotton or the like with the composition and wiping the skin off can impart a refreshing feel and remove excess sebum, thereby eliminating the greasiness. Further research led to the completion of the present invention.

[0010] That is, the present invention relates to the following. [1] A skin cosmetic comprising: (A) 0.1% by mass to 3% by mass of an alkylene oxide derivative represented by the following formula (1); (B) 5% by mass to 30% by mass of a dihydric alcohol having 3 to 6 carbon atoms; and (C) 0.01% by mass to 0.4% by mass of 2-ethylhexyl glyceryl ether:

[0011] [ka]

[0012] [In formula (1), Z represents a residue obtained by removing all hydroxyl groups from a hydroxy compound having 1 to 7 carbon atoms and 1 to 7 hydroxyl groups, and x represents an integer of 1 to 7. EO represents an oxyethylene group, PO represents an oxypropylene group, a and b represent the average number of moles of the oxyethylene groups added, and c represents the average number of moles of the oxypropylene groups added. 1≦a≦60, 1≦b≦40, and 1≦c≦60, b / c is 1 / 10 to 5 / 1, and a / (b+c) is 1 / 10 to 5 / 1. (EO) b / (PO) c indicates that an average number of moles of oxyethylene groups added is b moles and an average number of moles of oxypropylene groups added is c moles are randomly added. [2] The skin cosmetic preparation according to [1], further comprising 1% by mass to 6% by mass of (D) a whitening agent. [3] The skin cosmetic preparation according to [1] or [2], further comprising (E) 0.0005% by mass to 0.5% by mass of a copolymer including a constitutional unit based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the following formula (2) and a constitutional unit based on an alkyl (meth)acrylate represented by the following formula (3):

[0013] [ka]

[0014] [In the formula, R 1 represents a hydrogen atom or a methyl group.

[0015] [ka]

[0016] [In the formula, R 2 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 4 to 18 carbon atoms. Effect of the Invention

[0017] The skin cosmetic of the present invention can impart luster and a bouncy feel to the skin after application, and furthermore, can suppress the occurrence of greasiness on the skin, and can maintain the effect for a long time. Furthermore, when the skin is greased, it can be wiped off with cotton or the like soaked in the cosmetic to impart a refreshing feel and remove excess sebum, thereby eliminating the greasiness. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described. The skin cosmetic of the present invention contains (A) an alkylene oxide derivative represented by the following formula (1), (B) a dihydric alcohol having 3 to 6 carbon atoms, and (C) 2-ethylhexyl glyceryl ether. Each component will be described below.

[0019] (A) Alkylene oxide derivative The alkylene oxide derivative contained as component (A) in the skin cosmetic of the present invention is represented by the following formula (1).

[0020] [ka]

[0021] [In formula (1), Z represents a residue obtained by removing all hydroxyl groups from a hydroxy compound having 1 to 7 carbon atoms and 1 to 7 hydroxyl groups, and x represents an integer of 1 to 7. EO represents an oxyethylene group, PO represents an oxypropylene group, a and b represent the average number of moles of the oxyethylene groups added, and c represents the average number of moles of the oxypropylene groups added. 1≦a≦60, 1≦b≦40, and 1≦c≦60, b / c is 1 / 10 to 5 / 1, and a / (b+c) is 1 / 10 to 5 / 1. (EO) b / (PO) c indicates that an average number of moles of oxyethylene groups added is b moles and an average number of moles of oxypropylene groups added is c moles are randomly added.

[0022] In formula (1), Z is a hydroxy compound having 1 to 7 carbon atoms and 1 to 7 hydroxyl groups (Z(OH) x ) with all hydroxyl groups removed, and x represents the number of hydroxyl groups in the hydroxy compound and is an integer of 1 to 7. From the viewpoint of the effect of suppressing and removing shine, the hydroxy compound (Z(OH) x ) preferably has 2 or more carbon atoms, and more preferably has 3 or more carbon atoms. In addition, x is preferably 1 to 5, and more preferably 1 to 4. The above hydroxy compounds (Z(OH) xSpecific examples of the hydroxyl compounds include methanol, ethanol, propanol, butanol, propylene glycol, glycerin, trimethylolpropane, erythritol, pentaerythritol, glucose, sorbitan, methyl glucoside, diglycerin, xylitol, sorbitol, mannitol, inositol, and the like. In preparing the alkylene oxide derivative represented by formula (1), one of these hydroxyl compounds may be used, or a mixture of two or more of them may be used.

[0023] In formula (1), the oxyethylene group represented by EO is an oxyethylene group derived from ethylene oxide, and the oxypropylene group represented by PO is an oxypropylene group derived from propylene oxide such as 1,2-propylene oxide. In formula (1), (EO) a is a hydroxy compound (Z(OH) x ) monohydroxyl group, (EO) b / (PO) c is a hydroxy compound (Z(OH) x This shows oxyethylene groups and oxypropylene groups randomly added to the monohydroxyl groups of the olefin. In formula (1), a represents a hydroxy compound (Z(OH) x The average number of moles of oxyethylene groups added in a block form to the hydroxyl group of Z(OH) is from 1 to 60, preferably from 2 to 30, and more preferably from 2 to 15. In addition, in the formula (1), b represents a hydroxyl compound (Z(OH) x ) is the average number of moles of oxyethylene groups randomly added to the copolymer, and is 1 or more and 40 or less, preferably 2 or more and 20 or less, and more preferably 2 or more and 10 or less. In formula (1), c is a hydroxy compound (Z(OH) x The average number of moles of oxypropylene groups randomly added to the hydroxyl group of each of the oxypropylene groups is 1 or more and 60 or less, preferably 2 or more and 40 or less, and more preferably 3 or more and 30 or less. In formula (1), the ratio [b / c] of the average number of moles of oxyethylene groups added randomly to the average number of moles of oxypropylene groups added randomly to one hydroxyl group is 1 / 10 to 5 / 1, preferably 1 / 8 to 3 / 1, and more preferably 1 / 8 to 2 / 3. The ratio [a / (b+c)] of the average number of moles of oxyethylene groups added in blocks to the average number of moles of oxyethylene groups and oxypropylene groups added randomly to one hydroxyl group is 1 / 10 to 5 / 1, preferably 1 / 5 to 2 / 1, and more preferably 1 / 5 to 5 / 4.

[0024] The alkylene oxide derivative represented by formula (1) can be produced by appropriately synthesizing an alkylene oxide through a known addition reaction. x ) is subjected to addition polymerization of ethylene oxide, and then ethylene oxide and propylene oxide (1,2-propylene oxide, etc.) are subjected to addition polymerization. The amount of each monomer added during addition polymerization can be determined depending on the desired structure. Alternatively, commercially available products such as "WILBRIDE BS-03" (in formula (1), Z=butanol residue, a=6, b=4, c=7, b / c=4 / 7, a / (b+c)=6 / 11, x=1) sold by NOF Corporation can also be used.

[0025] In the skin cosmetic of the present invention, one alkylene oxide derivative represented by the above formula (1) may be selected and used alone, or two or more may be selected and used in combination.

[0026] The content of component (A) in the skin cosmetic of the present invention is 0.1 to 3 mass %, preferably 0.3 to 2.8 mass %, and more preferably 0.5 to 2.5 mass %, relative to the total amount of the skin cosmetic. If the content of component (A) is less than 0.1% by mass, the effects of suppressing and removing shine may decrease, whereas if it exceeds 3% by mass, the bouncy and refreshing feeling after use may decrease.

[0027] (B) Dihydric alcohol having 3 to 6 carbon atoms The dihydric alcohol having 3 to 6 carbon atoms contained as component (B) in the skin cosmetic of the present invention is a compound having a structure in which one hydroxyl group is substituted on each of two carbon atoms of an aliphatic hydrocarbon having 3 to 6 carbon atoms, and is not particularly limited as long as it can be used on the skin as a cosmetic, and may be either a straight-chain or branched-chain alkanediol or a straight-chain or branched-chain alkenediol, but for the purposes of the present invention, an alkanediol having 3 to 6 carbon atoms is preferable. Specifically, 1,2-propanediol (propylene glycol), 1,3-propanediol, 1,2-butanediol, 1,3-butanediol (butylene glycol), 1,4-butanediol, 1,2-pentanediol (pentylene glycol), 1,5-pentanediol, 1,2-hexanediol, 1,6-hexanediol, 2-methylpentane-2,4-diol (hexylene glycol), dipropylene glycol, etc. are mentioned. Among them, 1,2-propanediol (propylene glycol), 1,3-propanediol, 1,3-butanediol (butylene glycol), 1,2-pentanediol (pentylene glycol), dipropylene glycol, 1,2-hexanediol are preferable, and 1,3-propanediol, 1,3-butanediol (butylene glycol) and 1,2-pentanediol (pentylene glycol) are more preferable. As the component (B), one dihydric alcohol having 3 to 6 carbon atoms may be selected and used alone, or two or more may be selected and used in combination.

[0028] In the present invention, as the component (B), commercially available products provided by various companies as the above dihydric alcohols for cosmetic use can be used.

[0029] The content of component (B) in the skin cosmetic of the present invention is 5% by mass to 30% by mass, preferably 7.5% by mass to 27.5% by mass, and more preferably 10% by mass to 25% by mass, based on the total amount of the skin cosmetic. If the content of component (B) is less than 5% by mass, the bouncy feeling may decrease, and if it exceeds 30% by mass, the skin luster may decrease.

[0030] (C) 2-Ethylhexyl glyceryl ether The 2-ethylhexyl glyceryl ether contained as component (C) in the skin cosmetic of the present invention is a glyceryl alkyl ether in which 2-ethylhexanol is bonded to the hydroxyl group of glycerin, and may be any glyceryl alkyl ether generally used in cosmetics, and may be a commercially available product provided for use in cosmetics. Examples of such commercially available products include "Glymoist EH" (NOF Corporation) and "Saskine50" (SACHEM, Inc.). The content of component (C) in the skin cosmetic of the present invention is 0.01 to 0.4% by mass, preferably 0.05 to 0.35% by mass, and more preferably 0.1 to 0.25% by mass, based on the total amount of the skin cosmetic. If the content of component (C) is less than 0.01% by mass, the effect of removing shine and skin radiance may decrease, whereas if it exceeds 0.4% by mass, the effect of suppressing shine may decrease.

[0031] Content ratio of component (A), component (B) and component (C) From the viewpoint of the effect of removing shine and the effect of suppressing shine, the content ratio of the component (B) to the component (A) [(B) / (A)], in terms of mass ratio, is preferably 5 to 60, and more preferably 10 to 35. Moreover, the content ratio of the component (A) to the component (C) [(A) / (C)], in terms of mass ratio, is preferably 1 to 14, and more preferably 4 to 10.

[0032] The skin cosmetic of the present invention may further contain (D) a skin whitening agent in addition to the above components (A) to (C). Furthermore, the skin cosmetic of the present invention may contain, in addition to the above components (A) to (C) or the above components (A) to (C) and component (D), further contain (E) a copolymer containing a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the following formula (2) and a structural unit based on alkyl (meth)acrylate represented by the following formula (3): In addition, since this further enhances the effects of the present invention, it is preferable that the skin cosmetic composition of the present invention contains, in addition to the above components (A) to (C), component (D) or component (E), or component (D) and component (E).

[0033] (D) Skin whitening agents In the present invention, the whitening agent used as component (D) may be any agent that is generally used in cosmetics and has a whitening effect, and may be in any form, such as liquid, semi-solid, or solid. Specific examples of whitening agents include ascorbyl glucoside, tranexamic acid, and niacinamide. Ascorbyl glucoside (2-O-(α-D-glucopyranosyl)-L-ascorbic acid) contained as component (D) in the skin cosmetic of the present invention is a sugar derivative of ascorbic acid in which the hydroxy group at the 2-position of ascorbic acid is α-substituted with glucose, and any product commonly used in cosmetics may be used, and commercially available products provided for use in cosmetics may be used. Examples of such commercially available products include "AS-G" (Technoble Co., Ltd.). The tranexamic acid (4β-(aminomethyl)-1α-cyclohexanecarboxylic acid) contained as component (D) in the skin cosmetic of the present invention may be any that is generally used in cosmetics as a rough skin improving agent, whitening agent, etc., and commercially available products provided for use in cosmetics can be used. Examples of such commercially available products include "Tranexamic Acid" (Nippon Fine Chemical Co., Ltd.) and "Tranexamic Acid" (Maruzen Pharmaceutical Co., Ltd.). The niacinamide (pyridine-3-carboxamide) contained as component (D) in the skin cosmetic of the present invention may be any one generally used in cosmetics as an anti-wrinkle agent, whitening agent, etc., and may be a commercially available product provided for use in cosmetics. Examples of such commercially available products include "PD-3C" (Technoble Co., Ltd.) and "Nicotinamide" (DSM Co., Ltd.).

[0034] In the skin cosmetic composition of the present invention, one type of whitening agent may be selected and used alone, or two or more types may be selected and used in combination. The content of component (D) in the skin cosmetic of the present invention is preferably 1 to 6 mass %, more preferably 1.5 to 5.5 mass %, and even more preferably 2 to 5 mass %, relative to the total amount of the skin cosmetic. If the content of component (D) is within the above range, it is preferable in terms of the effect of imparting luster and bouncy feeling to the skin.

[0035] (E) A copolymer containing a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine and a structural unit based on alkyl (meth)acrylate The skin cosmetic preparation of the present invention may contain, as component (E), a copolymer (hereinafter also referred to as "copolymer E" in this specification) containing a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the following formula (2) and a structural unit based on alkyl (meth)acrylate represented by the following formula (3).

[0036] [ka]

[0037] [In the formula, R 1 represents a hydrogen atom or a methyl group.

[0038] [ka]

[0039] [In the formula, R2 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 4 to 18 carbon atoms.

[0040] In this specification, "(meth)acryloyl" means "acryloyl or methacryloyl". In addition, in this specification, "(meth)acrylic acid" means "acrylic acid or methacrylic acid".

[0041] In formula (3), R 3 is a straight-chain or branched alkyl group having 4 to 18 carbon atoms, preferably an alkyl group having 4 to 8 carbon atoms or an alkyl group having 12 to 18 carbon atoms, and more preferably an alkyl group having 4 or 18 carbon atoms. Examples of such alkyl groups include butyl, pentyl, hexyl, octyl, 2-ethylhexyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, etc. Among these, linear alkyl groups such as butyl, dodecyl, octadecyl, etc. are preferred, and butyl or octadecyl is more preferred.

[0042] In copolymer E contained as component (E) in the skin cosmetic of the present invention, the ratio of the content of the constituent units based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the above formula (2) to the content of the constituent units based on alkyl (meth)acrylate represented by the above formula (3) ([constituent units based on 2-(meth)acryloyloxyethyl phosphorylcholine]:[constituent 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.

[0043] The weight average molecular weight of Copolymer E is usually from 10,000 to 1,000,000, preferably from 30,000 to 900,000, and more preferably from 50,000 to 800,000. The weight average molecular weight of Copolymer E is measured by gel permeation chromatography (GPC) and is expressed as a molecular weight converted into polyethylene glycol.

[0044] The polymerization form of copolymer E is not particularly limited, and it may be a random copolymer or a block copolymer, but it is preferably a random copolymer.Also, copolymer E is usually a binary copolymer that is composed of a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine and a structural unit based on (meth)acrylic acid alkyl, but it may be a copolymer that contains other structural units in addition to the structural units. The other structural units contained in copolymer E can be appropriately selected from those which can be structural units of ordinary copolymers, so long as they do not affect the effects of the present invention. The content of other structural units in copolymer E 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.

[0045] Copolymer E can be produced by a known production method. For example, a monomer mixture containing 2-(meth)acryloyloxyethyl phosphorylcholine and (meth)alkyl acrylate, and, if necessary, monomers corresponding to other structural units, can be polymerized by a known method such as solution polymerization in the presence of a radical polymerization initiator under an inert gas atmosphere such as nitrogen. The content ratio of each monomer at this time may be the ratio corresponding to the content ratio of each structural unit in copolymer E. In the present invention, copolymer E can be produced by the polymerization method described above and used, but it is also possible to use commercially available products such as "LIPIDURE-B", "LIPIDURE-PMB", and "LIPIDURE-NR" (manufactured by NOF Corporation) as dispersions of copolymer E. In the skin cosmetic of the present invention, the copolymer E can be used alone or in combination of two or more kinds. The copolymer E contained in the skin cosmetic of the present invention may be in any form of a solid such as a powder, or in a liquid such as a solution or dispersion.

[0046] The content of component (E) in the skin cosmetic of the present invention is preferably 0.0005% by mass to 0.5% by mass, more preferably 0.001% by mass to 0.4% by mass, and even more preferably 0.005% by mass to 0.25% by mass, relative to the total amount of the skin cosmetic. If the content of component (E) is within the above range, it is preferable in terms of the effect of suppressing shine and the effect of imparting lustre to the skin.

[0047] In addition to the above components (A) to (E), the skin cosmetic of the present invention may also contain other raw materials and additives that are generally used in cosmetics, provided that the effects of the present invention are not impaired. Examples of such other raw materials and additives include oils (e.g., vegetable oils, higher alcohols, ester oils, etc.), lower alcohols (e.g., ethanol, etc.), polyhydric alcohols other than the above-mentioned component (B) (e.g., glycerin, diglycerin, etc.), moisturizers (e.g., amino acids such as glutamic acid, serine, proline, etc., plant extracts such as purslane extract, etc.), thickeners (e.g., carboxyvinyl polymers, alkyl-modified carboxyvinyl polymers, etc.), surfactants, dispersants, suspending agents, pH adjusters, chelating agents, antioxidants (e.g., tocopherol, etc.), preservatives, blood circulation promoters, anti-wrinkle agents (e.g., eucalyptus leaf extract, etc.), barrier function repair agents (N-stearoyl phytosphingosine, etc.), anti-inflammatory agents, cell activators, astringents, anti-acne agents, UV absorbers, preservatives, colorants, fragrances, etc.

[0048] The skin cosmetic of the present invention usually contains water in addition to the above components (A) to (E). In the skin cosmetic of the present invention, the water used may be any water suitable for producing cosmetics, such as purified water such as ion-exchanged water or distilled water. The content of water in the skin cosmetic of the present invention is set so that the total amount of the skin cosmetic is 100% by mass.

[0049] The skin cosmetic of the present invention can be provided in the form of a liquid, gel, emulsion, cream, etc., as skin care cosmetics such as lotion, beauty essence, emulsion, cream, etc.; base cosmetics such as base lotion, base cream, etc.; makeup cosmetics such as emulsion foundation, cream foundation, etc.; body cosmetics such as body lotion, body cream, etc.; medicinal cosmetics such as lotion, beauty essence, emulsion, cream, etc. for preventing wrinkles, whitening, etc. In the case of being used by impregnating cotton or the like, it is preferable to use a liquid, gel, milky or other aqueous skin cosmetic such as a lotion, serum, milky lotion or the like. The skin cosmetic of the present invention can be produced according to a typical formulation method that is adopted depending on the form of the skin cosmetic. For example, in the case of a liquid or gel skin cosmetic, the above-mentioned (A) to (C) components are mixed, and further, the (D) component or the (E) component, or the (D) component and the (E) component are added and mixed, and other raw materials, additives, and water are added and mixed as necessary, and homogenized to produce the product.

[0050] The skin cosmetic of the present invention can impart luster and a bouncy feel to the skin after application, and furthermore, can suppress the occurrence of greasiness on the skin, and can maintain the effect for a long time. Furthermore, when the skin is greased, it can be wiped off with cotton or the like soaked in the cosmetic to impart a refreshing feel and remove excess sebum, thereby eliminating the greasiness. EXAMPLES

[0051] The present invention will now be described more specifically with reference to examples and comparative examples.

[0052] [Examples 1 to 15, Comparative Examples 1 to 4] Aqueous skin cosmetics (lotion) According to the formulation shown in Table 1, the components (A) to (E) in Table 1 were added in order to ion-exchanged water and mixed uniformly to prepare the aqueous skin cosmetics of Examples 1 to 15. In addition, according to the compositions shown in Table 2, the components (A) or (A') to (C) in Table 2 were added in order to ion-exchanged water and mixed uniformly to prepare the aqueous skin cosmetics of Comparative Examples 1 to 4.

[0053] For the aqueous skin cosmetics of Examples 1 to 15 and Comparative Examples 1 to 4, a usage test was conducted with 20 panelists, men and women aged 24 to 50, as described below, and the skin luster after application, the bouncy feeling of the skin after application, the refreshing feeling after wiping, the effect of removing skin shine, and the effect of suppressing skin shine were evaluated. The evaluation results are shown in Tables 1 and 2. The numbers to the right of each evaluation result indicate the total score.

[0054] (1) Skin glow after application Twenty panelists applied 1 g of each of the aqueous skin cosmetics of the Examples and Comparative Examples to the entire face, and performed a sensory evaluation of the skin's luster after application, which was scored according to the following evaluation criteria. The total scores of the 20 panelists were calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: Very radiant skin. 1 point: Skin has some shine. 0 points: Skin lacks luster. <Judgment criteria> When the total score is 35 or more, it is regarded as ⊚: an aqueous skin cosmetic preparation having an excellent effect of imparting a gloss to the skin. When the total score is 30 or more and less than 35 points: ◯; the aqueous skin cosmetic is somewhat excellent in the effect of imparting shine to the skin. When the total score is 10 or more and less than 30 points, it is Δ: an aqueous skin cosmetic preparation that is somewhat inferior in the effect of imparting shine to the skin. When the total score is less than 10 points, it is judged as x: the aqueous skin cosmetic preparation is poor in the effect of imparting shine to the skin.

[0055] (2) Skin feels plump after application Twenty panelists applied 1 g of each of the aqueous skin cosmetics of the Examples and Comparative Examples to the entire face, and performed a sensory evaluation of the bouncy feeling of the skin after application, which was scored according to the following evaluation criteria. The total scores of the 20 panelists were calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: Very chewy texture. 1 point: Slightly chewy texture. 0 points: No chewy texture. <Judgment criteria> When the total score is 35 or more, it is regarded as ⊚: an aqueous skin cosmetic preparation having an excellent effect of imparting a bouncy feeling to the skin. When the total score is 30 or more and less than 35 points: ◯; the aqueous skin cosmetic is somewhat excellent in the effect of imparting a bouncy feeling to the skin. When the total score is 10 or more and less than 30 points, it is Δ: an aqueous skin cosmetic preparation that is somewhat inferior in the effect of imparting a bouncy feeling to the skin. When the total score is less than 10 points, it is judged as x: the aqueous skin cosmetic preparation is inferior in the effect of imparting a bouncy feeling to the skin.

[0056] (3) Refreshing feeling after wiping Twenty panelists soaked cotton with 1 g of each of the aqueous skin cosmetics of the Examples and Comparative Examples and wiped the entire face. After wiping, a sensory evaluation was conducted on the refreshing feeling of the skin, and the results were scored according to the following evaluation criteria. The total scores of the 20 panelists were calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: Feels very refreshing. 1 point: Feels slightly refreshing. 0 points: No refreshing feeling. <Judgment criteria> When the total score is 35 or more, it is rated as ⊚: an aqueous skin cosmetic which leaves an excellent refreshing feeling after wiping. When the total score is 30 or more and less than 35 points, it is rated as ◯; the aqueous skin cosmetic is somewhat excellent in terms of refreshing feeling after wiping. When the total score is 10 or more and less than 30 points, it is Δ; the aqueous skin cosmetic preparation is slightly inferior in terms of refreshing feeling after wiping. When the total score is less than 10 points, it is judged as x; the aqueous skin cosmetic preparation is inferior in refreshing feeling after wiping.

[0057] (4) Shine-removing effect Twenty panelists stayed in a room with a room temperature of 35°C and a relative humidity of 70% for 10 minutes, then moved to a room with a room temperature of 20°C and a relative humidity of 50%, where they impregnated cotton with 1g of each of the aqueous skin cosmetics of the Examples and Comparative Examples and wiped their faces. After wiping, a sensory evaluation was conducted on the effect of removing shine from the skin, and the results were scored according to the following evaluation criteria. The scores of the 20 panelists were calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: Shine is removed. 1 point: Shine is slightly removed. 0 points: Shine is not removed. <Judgment criteria> When the total score is 35 or more, it is regarded as an excellent aqueous skin cosmetic having excellent shine removing effect. When the total score is 30 or more and less than 35 points: ◯; the aqueous skin cosmetic preparation is somewhat excellent in the effect of removing shine. When the total score is 10 or more and less than 30 points, it is Δ; the aqueous skin cosmetic preparation is somewhat inferior in the effect of removing shine. When the total score is less than 10 points, it is judged as x: the aqueous skin cosmetic preparation is inferior in the effect of removing shine.

[0058] (5) Suppresses shine Twenty panelists stayed in a room with a room temperature of 35°C and a relative humidity of 70% for 10 minutes, then moved to a room with a room temperature of 20°C and a relative humidity of 50%, and wiped their faces with 1 g of each of the aqueous skin cosmetics of the Examples and Comparative Examples soaked in cotton. After wiping, the faces were photographed, and then photographed again two hours later. The photographs of the faces immediately after wiping and two hours after wiping were compared and observed to evaluate the occurrence and degree of shininess of the skin observed on the face, and were scored according to the following evaluation criteria. The total score of the 20 panelists was calculated and evaluated according to the following judgment criteria. <Evaluation criteria> 2 points: Shine is suppressed. 1 point: Shine is slightly suppressed. 0 points: Shine is not controlled. <Judgment criteria> When the total score is 35 or more, it is regarded as ⊚: an aqueous skin cosmetic preparation having an excellent effect of suppressing shine. When the total score is 30 or more and less than 35 points: ◯; the aqueous skin cosmetic preparation is somewhat excellent in the effect of suppressing shine. When the total score is 10 or more and less than 30 points, it is Δ; the aqueous skin cosmetic preparation is somewhat inferior in the effect of suppressing shine. When the total score is less than 10 points, it is judged as x: the aqueous skin cosmetic preparation has poor oiliness suppressing effect.

[0059] [Table 1]

[0060] The components (*1 to *6) in Table 1 are as follows. In addition, as the component (B) in Table 1, a product that is commercially available for use in cosmetics was used. *1: Alkylene oxide derivative (polyoxyethylene (10 mol) polyoxypropylene (7 mol) butyl ether): "WILBRIDE BS-03" (in formula (1), Z = butanol residue, a = 6, b = 4, c = 7, b / c = 4 / 7, a / (b+c) = 6 / 11, x = 1) (NOF Corporation) *2: 2-Ethylhexyl glyceryl ether: "Glymoist EH" (NOF Corporation) *3 Ascorbyl glucoside: "AS-G" (Technoble Co., Ltd.) *4 Tranexamic acid: "Tranexamic acid" (Nippon Fine Chemicals Co., Ltd.) *5 Niacinamide: "PD-3C" (Technoble Co., Ltd.) *6: 2-Methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer: Lipidure-PMB (NOF Corporation)

[0061] As shown in Table 1, the aqueous skin cosmetic preparations of Examples 1 to 15 were all rated as "A" or "B" in all evaluation items. In particular, the aqueous skin cosmetic preparations of Examples 8 and 10, which contained the components (A), (B), and (C) in more preferred contents and in which the mass ratio of the component (B) to the component (A) [(B) / (A)] and the mass ratio of the component (A) to the component (C) [(A) / (C)] were both within more preferred ranges, and the aqueous skin cosmetic preparation of Example 15, which contained the components (D) and (E) in addition to the components (A) to (C), were rated as "◎" in all evaluation items.

[0062] [Table 2]

[0063] The components (*1, *2) and (B) in Table 2 were the same as those used in the preparation of Examples 1 to 15. Also, *7 is as follows. *7: Polyoxyethylene (9 mol) polyoxypropylene (10 mol) butyl ether: "UNILUBE 50MB-11" (alkylene oxide derivative represented by the following formula (4)) (NOF Corporation)

[0064] As shown in Table 2, none of the aqueous skin cosmetics of Comparative Examples 1 to 4 were rated as "◯" or "◎" in any of the evaluation items. That is, the aqueous skin cosmetic preparation of Comparative Example 1, which did not contain component (A), was evaluated as being inferior in the effects of removing shine and suppressing shine. The aqueous skin cosmetic preparation of Comparative Example 2, which did not contain component (B), was evaluated as being inferior in the effect of imparting a bouncy feeling to the skin and as being insufficient in the effect of removing shine. The aqueous skin cosmetic preparation of Comparative Example 3, which did not contain component (C), was evaluated as being inferior in the effect of imparting shine to the skin and as being insufficient in the effect of removing shine. The aqueous skin cosmetic preparation of Comparative Example 4, in which component (A) was replaced with component (A') represented by the following formula (4) (an alkylene oxide derivative in which oxyethylene groups and oxypropylene groups are randomly added to the hydroxyl groups of butanol), was evaluated as having insufficient effects on providing a refreshing feeling to the skin, as well as effects on removing shine and suppressing shine.

[0065] [ka]

[0066] [In formula (4), Z represents a butanol residue, EO represents an oxyethylene group, and PO represents an oxypropylene group.]

[0067] Next, other examples of the skin cosmetic of the present invention (Examples 16 and 17) are shown. The skin cosmetic of these Examples also gave the skin a glossy and bouncy feel after application, and further suppressed the occurrence of skin greasiness, and the effect was able to be sustained for a long time. In addition, when the skin was greased, it was possible to give a refreshing feeling and remove excess sebum by wiping it off with cotton or the like, thereby eliminating the greasiness.

[0068] [Example 16] Gel-type skin cosmetic Based on the formulation shown in Table 3, a gel-type skin cosmetic was produced as follows. The alkylene oxide derivative, 2-ethylhexyl glyceryl ether, niacinamide, and 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer in Table 3 were the same raw materials as those used in the production of Examples 1 to 15 above, and the other raw materials were products commercially available for use in cosmetics. The content of each component in Table 3 indicates the net content of each component, and the contents of purslane extract and eucalyptus leaf extract are the contents converted into solid content. <Manufacturing method> The other additives (5) and (6) were dispersed in a portion of the ion-exchanged water to prepare an aqueous dispersion. The components (A) to (D) and the other additives (1) and (2) were mixed and added to the remaining portion of the ion-exchanged water to dissolve uniformly, and the mixture was heated to 75°C to 80°C. The mixture was cooled to 40°C, and the component (E) and the other additives (3), (4), (9), (10), (12) to (15) were added in order, mixed, and dissolved. The aqueous dispersion prepared in advance was then added to thicken the mixture, and a mixture of the other additives (7), (8), (11), and (16) was added, and the total amount was adjusted to 100% by mass with ion-exchanged water.

[0069] [Table 3]

[0070] [Example 17] Milky skin cosmetic Based on the formulation shown in Table 4, a milky skin cosmetic was produced as follows. The alkylene oxide derivative, 2-ethylhexyl glyceryl ether, ascorbyl glucoside, and 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer in Table 4 were the same raw materials as those used in the production of Examples 1 to 15 above, and the other raw materials were products commercially available for use in cosmetics. The content of each component in Table 4 indicates the net content of each component, and the contents of purslane extract and eucalyptus leaf extract are the contents converted into solid content. <Manufacturing method> The other additive components (5) and (6) were dispersed in a portion of the ion-exchanged water in advance to prepare an aqueous dispersion. The component (B), the component (C), the other additives (1) and (2), and the remaining portion of the ion-exchanged water were mixed and dissolved, and heated to 75°C to 80°C to prepare an aqueous phase. Meanwhile, the other additives (8) to (14) and (17) were mixed and heated to 75°C to 80°C to homogenize and prepare an oil phase. The oil phase was added to the aqueous phase with stirring to emulsify, and cooled to 40°C. The components (A), (D), and (E), and the other additives (3), (4), (15), (16), and (18) to (22) were added in order, mixed, and dissolved, and then the previously prepared aqueous dispersion and the other additive (7) were added to thicken the mixture.

[0071] [Table 4] [Industrial Applicability]

[0072] As described above in detail, the present invention can provide a skin cosmetic that can impart luster and a bouncy feel to the skin after application, and further suppress the occurrence of skin greasiness, and can maintain its effect for a long time. When the skin is greased, the skin cosmetic of the present invention can be impregnated with cotton or the like and wiped off to impart a refreshing feel and remove excess sebum, thereby eliminating the greasiness.

Claims

1. A skin cosmetic comprising (A) 0.1% by mass to 3% by mass of an alkylene oxide derivative represented by the following formula (1), (B) 5% by mass to 30% by mass of a dihydric alcohol having 3 to 6 carbon atoms, and (C) 0.01% by mass to 0.4% by mass of 2-ethylhexyl glyceryl ether: 【Chemistry 1】 [In formula (1), Z represents a residue obtained by removing all hydroxyl groups from a hydroxy compound having 1 to 7 carbon atoms and 1 to 7 hydroxyl groups, and x represents an integer of 1 to 7. EO represents an oxyethylene group, PO represents an oxypropylene group, a and b represent the average number of moles of the oxyethylene groups added, and c represents the average number of moles of the oxypropylene groups added. 1≦a≦60, 1≦b≦40, and 1≦c≦60, b / c is 1 / 10 to 5 / 1, and a / (b+c) is 1 / 10 to 5 / 1. (EO) ｂ / (PO) ｃ indicates that an average added mole number of oxyethylene groups is b moles and an average added mole number of oxypropylene groups is c moles are added randomly.

2. The skin cosmetic preparation according to claim 1, further comprising (D) 1% by mass to 6% by mass of a whitening agent.

3. The skin cosmetic preparation according to claim 1 or 2, further comprising (E) 0.0005% by mass to 0.5% by mass of a copolymer containing a constitutional unit based on 2-(meth)acryloyloxyethyl phosphorylcholine represented by the following formula (2) and a constitutional unit based on an alkyl (meth)acrylate represented by the following formula (3): 【Chemistry 2】 [In the formula, R １ represents a hydrogen atom or a methyl group. 【Chemistry 3】 [In the formula, R ２ represents a hydrogen atom or a methyl group, R ３ represents an alkyl group having 4 to 18 carbon atoms.

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