Emulsion cosmetic

Abstract

To provide an emulsion cosmetic that, when applied, spreads quickly and evenly on the skin, prevents the formation of powdery residues, and makes the skin look shiny and moisturized, resulting in a consistently well-toned finish.SOLUTION: An emulsion cosmetic contains following components (A), (B), (C), (D) and (E): (A) oil-based gelator, (B) 0.1-30 mass% of hydrocarbon oil that is liquid at 25°C, (C) nonionic surfactant, (D) powder, and (E) water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to emulsified cosmetics. [Background technology]

[0002] Because the outer phase of water-in-oil emulsion cosmetics is an oil-based agent, it is easy to impart water resistance to them, and they are widely used in emulsion-type foundations and sunscreens. Furthermore, in water-in-oil emulsions containing powders, those with gel-like elasticity are being investigated. For example, Patent Document 1 describes a water-in-oil emulsion cosmetic containing a polymer composed of hydrophilic segments with N-acylalkyleneimines as repeating units and organopolysiloxane segments, a sorbitan fatty acid ester, a polyether silicone phosphate, and a powder, which has excellent feel when applied, good storage stability, and elasticity. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2013-136520 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, conventional emulsified cosmetics containing oily gelling agents, nonionic surfactants, powders, and water had drawbacks such as being prone to uneven application and requiring a long application time. Furthermore, the finish was not entirely satisfactory, often resulting in a somewhat powdery appearance. [Means for solving the problem]

[0005] The inventors of the present invention have found that by combining a liquid hydrocarbon oil at 25°C with an oil gelling agent, a nonionic surfactant, powder, and water in a specific ratio, when applied to the skin, it spreads quickly and evenly, the powdery feeling of the finish is suppressed, it has luster, the skin looks moist, has firmness, and an emulsified cosmetic with a uniform finish can be obtained.

[0006] The present invention relates to an emulsified cosmetic containing the following components (A), (B), (C), (D) and (E): (A) An oil gelling agent (B) 0.1 to 30% by mass of a liquid hydrocarbon oil at 25°C (C) A nonionic surfactant (D) Powder (E) Water It relates to an emulsified cosmetic containing these.

Effects of the Invention

[0007] When the emulsified cosmetic of the present invention is applied to the skin, it spreads quickly and evenly, the powdery feeling of the finish is suppressed, it has luster, the skin looks moist, and a firm and uniform finish can be obtained on the skin.

Modes for Carrying Out the Invention

[0008] Examples of the oil gelling agent of component (A) used in the present invention include those used in ordinary cosmetics, such as organopolysiloxanes formed by bonding poly(N-acylalkyleneimine) segments, styrene copolymers, glycerin fatty acid esters that are solid at 25°C, dextrin fatty acid esters, organically modified clay minerals, and the like.

[0009] Examples of the organopolysiloxane formed by bonding poly(N-acylalkyleneimine) segments include, at least two silicon atoms of the organopolysiloxane segment constituting the main chain, via an alkylene group containing a hetero atom, the following general formula (1);

[0010]

Chemical formula

[0011] (In the formula, R 1 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and t represents 2 or 3) An organopolysiloxane formed by bonding a poly(N-acylalkyleneimine) segment composed of a repeating unit represented by The number average molecular weight of the poly(N-acylalkyleneimine) segment is 500 to 4000, The mass ratio (a / b) of the organopolysiloxane segment (a) constituting the main chain to the poly(N-acylalkyleneimine) segment (b) is 70 / 30 to 99 / 1, The weight average molecular weight of the organopolysiloxane segment between adjacent poly(N-acylalkyleneimine) segments is 5000 to 40000, [[ID=仃]]An organopolysiloxane having a weight average molecular weight of 15000 to 200000 for the organopolysiloxane segment constituting the main chain is preferable, and by using this component, more excellent stability can be obtained.

[0012] The poly(N-acylalkyleneimine) segment is bonded to at least two arbitrary silicon atoms constituting the organopolysiloxane segment via an alkylene group containing a hetero atom. Further, it is preferable that the alkylene group is bonded to one or more silicon atoms excluding both ends of the organopolysiloxane segment, and more preferably, the alkylene group is bonded to two or more silicon atoms excluding both ends. That is, the organopolysiloxane of component (A) is a graft polymer having, as a side chain, at least two or more poly(N-acylalkyleneimine) segments composed of the repeating unit represented by the general formula (1).

[0013] Alkylene groups containing heteroatoms function as linking groups for poly(N-acylalkyleneimine) segments. Examples of such alkylene groups include C2-C20 alkylene groups containing 1-3 nitrogen, oxygen, or sulfur atoms, among which groups represented by any of the following formulas (i) to (vii) are preferred, groups represented by formula (i) or (ii) are more preferred, and groups represented by formula (i) are even more preferred. In the formula, An - represents the counterion of a quaternary ammonium salt, and examples include ethyl sulfate ion, methyl sulfate ion, chloride ion, iodide ion, sulfate ion, p-toluenesulfonate ion, and perchlorate ion.

[0014] [ka]

[0015] In the N-acylalkyleneimine units that constitute the poly(N-acylalkyleneimine) segment, in general formula (1), R 1 Examples of C1-C3 alkyl groups include linear alkyl groups with C1-C3 or branched alkyl groups with C3, specifically the methyl group, ethyl group, n-propyl group, and isopropyl group.

[0016] In general formula (1), t represents the number 2 or 3, and from the viewpoint of obtaining raw materials during organopolysiloxane production, it is preferably 2.

[0017] The mass ratio (a / b) is in the range of 70 / 30 to 99 / 1, preferably 75 / 25 to 98 / 2, and more preferably 83 / 17 to 97 / 3, in terms of excellent adhesion to the skin and uniformity of the finish. In this specification, the mass ratio (a / b) is determined by dissolving the organopolysiloxane of component (A) in deuterated chloroform at a mass of 5%, and then performing nuclear magnetic resonance ( 1The value determined from the integration ratio of the alkyl group or phenyl group in the organopolysiloxane segment to the methylene group in the poly(N-acylalkyleneimine) segment by 1H-NMR analysis.

[0018] In the organopolysiloxane of component (A), the weight average molecular weight of the organopolysiloxane segment (hereinafter also simply referred to as "MWg") between adjacent poly(N-acylalkyleneimine) segments is in the range of 5000 to 40000. From the viewpoint of the flexibility of the cosmetic film, 10000 to 35000 is preferable, and 15000 to 32000 is more preferable.

[0019] In the present specification, the "organopolysiloxane segment between adjacent poly(N-acylalkyleneimine) segments" means, as shown in the following formula (2), from the bonding point (bonding point A) of the poly(N-acylalkyleneimine) segment to the organopolysiloxane segment, to the bonding point (bonding point B) of the adjacent poly(N-acylalkyleneimine) segment, the portion surrounded by a broken line between the two points, which is composed of one R 2 SiO unit, one R 3 and y + 1 (R 2 )2SiO units. Further, the "poly(N-acylalkyleneimine) segment" means -Z-R 3 bonded to the above R 4 .

[0020]

Chemical formula

[0021] In the above general formula (2), each R 2 independently represents an alkyl group having 1 to 22 carbon atoms or a phenyl group, R 3 represents an alkylene group containing a hetero atom, -Z-R 4 represents a poly(N-acylalkyleneimine) segment, and R 4 represents the residue of a polymerization initiator, and y represents a positive number.

[0022] MWg is the molecular weight of the portion enclosed by the dashed line in the general formula (2) above, and can be interpreted as the mass (g / mol) of organopolysiloxane segments per mole of poly(N-acylalkyleneimine) segments. Note that when the functional groups of the modified organopolysiloxane, which is the starting compound, are 100% substituted with poly(N-acylalkyleneimine), it coincides with the functional group equivalent (g / mol) of the modified organopolysiloxane.

[0023] The molecular weight of the poly(N-acylalkyleneimine) segment can be calculated from the molecular weight and degree of polymerization of the N-acylalkyleneimine unit, or measured by gel permeation chromatography (hereinafter also simply referred to as "GPC"). In this invention, the number average molecular weight in polystyrene terms (hereinafter also simply referred to as "MNox") measured by GPC measurement performed under the measurement conditions described below refers to the number average molecular weight (hereinafter also simply referred to as "MNox") in polystyrene terms. From the viewpoint of improving the flexibility of the cosmetic film and its solubility in the solvent, MNox is preferably in the range of 500 to 4000, more preferably 800 to 3500, and even more preferably 1000 to 3000.

[0024] Furthermore, the above MWg can be determined using the following formula (I) with respect to the content (mass%) of organopolysiloxane segments constituting the main chain (hereinafter also simply referred to as "Csi"). MWg = Csi × MNox / (100 - Csi) (I)

[0025] The weight-average molecular weight (hereinafter also simply referred to as "MWsi") of the organopolysiloxane segments constituting the main chain is 15,000 to 200,000, preferably 50,000 to 170,000, and more preferably 70,000 to 150,000, from the viewpoint of the flexibility of the cosmetic and its adhesion to the skin. Furthermore, the organopolysiloxane of component (A) can be easily incorporated into various products by dissolving it in a polar solvent such as water. Since the organopolysiloxane segments constituting the main chain have a common skeleton with the modified organopolysiloxane, which is the raw material compound, MWsi is approximately the same as the weight-average molecular weight of the modified organopolysiloxane, which is the raw material compound. The weight-average molecular weight of the modified organopolysiloxane, which is the raw material compound, was measured by GPC under the measurement conditions described below and converted to polystyrene equivalent.

[0026] The weight-average molecular weight (hereinafter also simply referred to as "MWt") of the organopolysiloxane of component (A) is preferably 15,000 to 200,000, more preferably 50,000 to 170,000, and even more preferably 70,000 to 150,000, from the viewpoint of excellent adhesion to the skin. MWt is the value obtained by measuring gel permeation chromatography (GPC) under the measurement conditions described below and converted to polystyrene equivalent.

[0027] Component (A), organopolysiloxane, possesses a high modulus of elasticity and a large deformability, as well as a distinctive thermoplasticity: when heated to a temperature range of 50-220°C, its plasticity improves significantly, making it softer, and it quickly regains its elasticity when heating is stopped and it returns to room temperature.

[0028] The organopolysiloxane of component (A) is, for example, the following general formula (3):

[0029] [ka]

[0030] (In the formula, R 2 This has the same meaning as above, R 5 and R 6 These are R2 It indicates the same group as shown in the following formulas (viii)~(xiii)

[0031] [ka]

[0032] It represents a monovalent group represented by one of the following, R 7 (where represents a monovalent base expressed by the above formulas (viii) to (xiii), d represents a number between 91.5 and 1255.0, and e represents a number between 2.0 and 62.5) Modified organopolysiloxane represented by the following general formula (4)

[0033] [ka]

[0034] (In the formula, R 1 (and t has the same meaning as above) It is produced by reacting a cyclic iminoether represented by with a terminally reactive poly(N-acylalkyleneimine) obtained by ring-opening polymerization.

[0035] A polymerization initiator can be used for ring-opening polymerization of cyclic iminoethers represented by general formula (4) (hereinafter also simply referred to as "cyclic iminoether (4)"). As polymerization initiators, compounds with strong electrophilic reactivity, such as alkyl esters of strong acids including alkyl benzenesulfonates, alkyl p-toluenesulfonates, alkyl trifluoromethanesulfonates, alkyl trifluoroacetates, and dialkyl sulfates, can be used, with dialkyl sulfates being particularly preferred.

[0036] As polymerization solvents, for example, acetic acid esters such as ethyl acetate and propyl acetate, ethers such as diethyl ether, diisopropyl ether, dioxane and tetrahydrofuran, ketones such as acetone and methyl ethyl ketone, halogen solvents such as chloroform and methylene chloride, nitrile solvents such as acetonitrile and benzonitrile, and aprotic polar solvents such as N,N-dimethylformamide, N,N-dimethylacetamide and dimethyl sulfoxide can be used, with acetic acid esters being particularly preferred. The amount of solvent used is usually 20 to 2000 parts by mass per 100 parts by mass of cyclic imino ether (4).

[0037] The polymerization temperature is typically 30 to 170°C, preferably 40 to 150°C, and the polymerization time is not uniform depending on the polymerization temperature, but is usually 1 to 60 hours.

[0038] If, for example, a 2-substituted 2-oxazoline is used as the cyclic iminoether (4), a poly(N-acylethyleneimine) with t=2 in the general formula (1) is obtained, and if a 2-substituted dihydro-2-oxazine is used, a poly(N-acylpropyleneimine) with t=3 in the general formula (1) is obtained.

[0039] The poly(N-acylalkyleneimine) obtained by living polymerization of the cyclic iminoether (4) has reactive groups at its termini. Therefore, by reacting the reactive groups at the termini of this poly(N-acylalkyleneimine) with the reactive groups indicated by (viii) to (xiii) of the modified organopolysiloxane represented by general formula (3), the organopolysiloxane of component (A) can be obtained.

[0040] The aforementioned living polymerization method is effective because, as shown in the theoretical formula (II) below, the degree of polymerization can be easily controlled by the amount of cyclic imino ether (4) and polymerization initiator used, and moreover, it yields a nearly monodisperse poly(N-acylalkyleneimine) with a narrower molecular weight distribution than conventional radical polymerization.

[0041]

number

[0042] The amount of cyclic iminoether (4) and polymerization initiator used is preferably such that MNi in formula (II) is 500 to 4000, more preferably 800 to 3500, and even more preferably 1000 to 3000.

[0043] The weight-average molecular weight of the modified organopolysiloxane represented by general formula (3) is preferably 15,000 to 220,000, more preferably 50,000 to 190,000, and even more preferably 70,000 to 170,000, from the viewpoint of the solubility of the obtained organopolysiloxane in polar solvents such as water and ease of handling after dissolution.

[0044] Furthermore, the functional group equivalent of the modified organopolysiloxane represented by general formula (3) has an upper limit in order to satisfy the mass ratio (a / b) and MWg of the organopolysiloxane of component (A). From this viewpoint and from the viewpoint of giving the main chain appropriate hydrophobicity, the functional group equivalent is preferably 50,000 to 40,000, more preferably 10,000 to 35,000, and even more preferably 15,000 to 32,000. Here, the functional group equivalent of the modified organopolysiloxane represented by general formula (3) is the weight-average molecular weight of the modified organopolysiloxane represented by general formula (3) and the R that the modified organopolysiloxane has per molecule. 7 This refers to the value obtained by dividing the number by the average value of the numbers.

[0045] The amount of modified organopolysiloxane represented by general formula (3) and the terminally reactive poly(N-acylalkyleneimine) used is preferably such that their mass ratio (modified organopolysiloxane / terminally reactive poly(N-acylalkyleneimine)) is in the range of 70 / 30 to 99 / 1, from the viewpoint of the elastic modulus and deformability of the resulting organopolysiloxane. More preferably, it is 75 / 25 to 98 / 2, and even more preferably 83 / 17 to 97 / 3, from the viewpoint of excellent adhesion to the skin, uniformity of the finish, and emulsification.

[0046] In the present invention, in the synthesis of each organopolysiloxane, various molecular weights were measured according to the following measurement conditions.

[0047] <Measurement Conditions for Weight-Average Molecular Weight of Modified Organopolysiloxane> Column: Super HZ4000 + Super HZ2000 (manufactured by Tosoh Corporation) Eluent: 1 mM triethylamine / THF Flow rate: 0.35 mL / min Column temperature: 40 °C Detector: UV Sample: 50 μL

[0048] <Measurement Conditions for MNox and MWt> Column: Two K-804L (manufactured by Tosoh Corporation) connected in series were used. Eluent: 1 mM dimethyldodecylamine / chloroform Flow rate: 1.0 mL / min Column temperature: 40 °C Detector: RI Sample: 50 μL

[0049] Also, for the calculation of the mass ratio (a / b), 1 1H-NMR measurement was performed under the following conditions. < 1 1H-NMR Measurement Conditions> The composition of the obtained polymer was 1 confirmed by 1H-NMR (400 MHz, manufactured by Varian). A sample of 0.5 g dissolved in 2 g of the measurement solvent (heavy chloroform) was measured. PULSE SEQUENCE ·Relax.delay: 30 seconds ·Pulse: 45 degrees ·Number of integrations: 8 times Confirmation peak around 0 ppm: Methyl group of polydimethylsiloxane, around 3.4 ppm: Methylene part of ethyleneimine. The ratio of silicone to poly(N-propionylethyleneimine) was calculated from each integral value.

[0050] The organopolysiloxane of component (A) is preferably poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosiloxane, poly(N-propionylethyleneimine)organosiloxane, etc., and more preferably poly(N-propionylethyleneimine)organosiloxane (POLYSILICONE-9).

[0051] Examples of styrene copolymers include copolymers of styrene-isoprene, styrene-ethylenepropylene, styrene-butadiene, styrene-ethylenebutylene, styrene-propylenebutylene, styrene-butylene, and hydrogenated styrene-isoprene. Of these, hydrogenated styrene-isoprene copolymer is preferred from the viewpoint of excellent adhesion to the skin and uniformity of the finish. These diblock copolymers preferably have a number-average molecular weight of 100,000 to 3,000,000, and more preferably 150,000 to 1,500,000. The number-average molecular weight (Mn) is determined by gel permeation liquid chromatography (THF solvent, calibration curve defined with linear polystyrene as the standard, refractive index detector). Furthermore, the mass ratio of styrene to isoprene, ethylenepropylene, butadiene, ethylenebutylene, propylenebutylene, or butene is preferably 10 / 90 to 50 / 50, and more preferably 20 / 80 to 40 / 60, from the viewpoint of a smooth feel.

[0052] Examples of such styrene copolymers that can be used include commercially available products such as Kraton G1701, Kraton G1702 (manufactured by Kraton), Viscup P (manufactured by Arch), Versagel ME1600 (manufactured by Penreco) dispersed in an oil, and PIONIER GEL 12PAO (manufactured by Hansen & Rosenthal KG).

[0053] In the case of glycerol fatty acid esters that are solid at 25°C, "solid at 25°C" means that they exhibit semi-solid to solid properties at 25°C. As a glycerol fatty acid ester that is solid at 25°C, triesters are preferred, and from the viewpoint of excellent adhesion to the skin and uniform finish, triglycerides of fatty acids having 20 to 28 carbon atoms are more preferred, triglycerides of fatty acids having 20 to 24 carbon atoms are even more preferred, and tribehenin is even more preferred.

[0054] The dextrin fatty acid ester is not limited as long as it is commonly used in cosmetics, but esters of dextrin with a fatty acid having 8 to 24 carbon atoms are preferred, and esters of dextrin with a fatty acid having 14 to 20 carbon atoms are more preferred. Furthermore, it is preferable that the average degree of polymerization of the dextrin is 3 to 150. Specifically, examples include dextrin palmitate, dextrin stearate, palmitic acid / dextrin stearate, dextrin oleate, dextrin isopalmitate, dextrin isostearate, dextrin myristate, and dextrin palmitate / 2-ethylhexanoate. Of these, dextrin palmitate, dextrin myristate, and dextrin palmitate-2-ethylhexanoate are preferred from the viewpoint of excellent adhesion to the skin and uniformity of the finish, and it is more preferable to include dextrin palmitate.

[0055] As for organically modified clay minerals, any type commonly used in cosmetics can be used without limitation. For example, cationically modified clay minerals obtained by treating layered clay minerals such as bentonite, laponite, hectorite, montmorillonite, and aluminum magnesium silicate with a quaternary ammonium salt type cationic surfactant are preferred. Here, the quaternary ammonium salt type cationic surfactant is given by the following formula (5):

[0056] [ka]

[0057] (In the formula, R 11 R represents an alkyl group or benzyl group having 10 to 22 carbon atoms. 12 R represents a methyl group or an alkyl group having 10 to 22 carbon atoms. 13 and R 14 (where X represents an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or methyl sulfate residue.) It is represented by [this].

[0058] Specifically, dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium chloride, cetyldimethylethylammonium chloride, stearyldimethylethylammonium chloride, behenyldimethylethylammonium chloride, myristyldiethylmethylammonium chloride, cetyldiethylmethylammonium chloride, stearyldiethylmethylammonium chloride, behenyldiethyl Examples include ammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride, distearyldimethylammonium chloride, dibehenyldihydroxyethylammonium chloride, and bromide compounds in which the chloride of the above compounds is replaced with a bromide compound, as well as dipalmitylpropylethylammonium methyl sulfate. Of these, benzyldimethylstearylammonium chloride and dimethyldistearylammonium chloride are preferred from the viewpoint of excellent adhesion to the skin and uniformity of the finish, and it is preferable that at least dimethyldistearylammonium chloride is included.

[0059] Cationic modified clay minerals obtained by treating layered clay minerals with quaternary ammonium salt type cationic surfactants include dimethyldistearylammonium hectorite, dimethyldistearylammonium bentonite, and benzyldimethylstearylammonium hectorite, with dimethyldistearylammonium hectorite being more preferred. Commercially available products include Benton 38, Benton 38 VCG, and Benton 27 (all manufactured by Elementis Japan Co., Ltd.).

[0060] Organically modified clay minerals can also be used as a dispersion diluted with a solvent due to their advantages in improving workability and their excellent thickening effect on oils. Specifically, it is preferable to use a premixed gel in which organically modified clay minerals are dispersed in a solvent beforehand. The solvent is not limited as long as it can be thickened by the organically modified clay minerals, but octyldodecanol, mineral oil, etc. are preferred from the viewpoint of thickening the oil. Furthermore, it is preferable to include polar additives such as propylene carbonate, ethanol, water, and various surfactants from the viewpoint of efficiently dispersing the organically modified clay minerals and exhibiting the thickening effect. The content of organically modified clay minerals in the premix gel is preferably 5 to 25% by mass, more preferably 8 to 20% by mass, and even more preferably 10 to 18% by mass, from the standpoint of improving workability, thickening the oil, and suppressing oil separation in the thickened oily gel itself. As premix gels, commercially available products such as Benton's Gel EUGV, Benton's Gel MIOV, Benton's Gel ISDV containing 10% by mass of cation-modified clay minerals, Benton's Gel VS-5 PCV containing 18% by mass, and Benton's Gel PTM containing 15% by mass (all manufactured by Elementis Japan Co., Ltd.) can be used.

[0061] Component (A) can be used alone or in combination of two or more types. From the viewpoint of excellent adhesion to the skin and uniformity of the finish, the content is preferably 0.3% by mass or more, more preferably 0.6% by mass or more, even more preferably 1% by mass or more, preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. Furthermore, the content of component (A) is preferably 0.3 to 10% by mass, more preferably 0.6 to 7% by mass, and even more preferably 1 to 5% by mass.

[0062] Component (B) is a hydrocarbon oil that is liquid at 25°C. "Liquid" means it has fluidity, and this includes creamy and paste-like forms. The hydrocarbon oil of component (B) may be one commonly used in cosmetics, and may be either volatile or non-volatile. Examples of volatile hydrocarbon oils include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Examples of non-volatile hydrocarbon oils include linear or branched hydrocarbon oils such as liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, mineral oil, squalane, α-olefin oligomer, polyisobutylene, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum.

[0063] Regarding component (B), it is preferable that it contains (B1) non-volatile hydrocarbon oil, from the viewpoint of spreading quickly and evenly when applied to the skin. Non-volatile means that when 1 g of the oil is spread in a glass petri dish with a diameter of 48 mm and left for 24 hours at 25°C and normal pressure, the weight loss rate is 1% or less. Furthermore, it is preferable that the non-volatile hydrocarbon oil of component (B1) is liquid at 25°C. Liquid means having fluidity, and this includes cream and paste forms. (B1) Non-volatile hydrocarbon oils can be used individually or in combination of two or more types. From the viewpoint of suppressing the powdery finish, providing gloss, making the skin appear moisturized, and giving the skin a firm and uniform finish, the content is preferably 0.02% by mass or more, more preferably 0.3% by mass or more, even more preferably 1.2% by mass or more, preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. Furthermore, the content of component (B1) is preferably 0.02 to 30% by mass of the total composition, more preferably 0.3 to 25% by mass, and even more preferably 1.2 to 20% by mass.

[0064] In the present invention, the mass ratio (B1) / (B) of component (B) in component (B) is preferably 0.2 or higher, more preferably 0.3 or higher, even more preferably 0.4 or higher, and 1 or lower, from the viewpoint of suppressing the powdery finish, having a glossy finish, making the skin appear moisturized, and providing a firm and uniform finish to the skin. Furthermore, the mass ratio (B1) / (B) of component (B) in component (B) is preferably 0.2 to 1, more preferably 0.3 to 1, and even more preferably 0.4 to 1.

[0065] Component (B) can be used alone or in combination of two or more types. From the viewpoint of achieving a finish that spreads quickly and evenly when applied to the skin, suppresses a powdery feel, has a glossy finish, makes the skin appear moisturized, and provides firmness and a uniform finish, the content of component (B) is 0.1% by mass or more, preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 4% by mass or more, 30% by mass or less, preferably 25% by mass or less, and even more preferably 20% by mass or less. Furthermore, the content of component (B) is 0.1 to 30% by mass of the total composition, preferably 1 to 25% by mass, more preferably 3 to 20% by mass, and even more preferably 4 to 20% by mass.

[0066] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.02 or higher, more preferably 0.03 or higher, even more preferably 0.05 or higher, even more preferably 0.2 or higher, preferably 2 or lower, more preferably 1 or lower, and even more preferably 0.5 or lower, from the viewpoint of achieving a finish that spreads quickly and evenly when applied to the skin, suppresses a powdery feel, has a glossy finish, makes the skin appear moisturized, and gives the skin a firm and uniform feel.

[0067] The nonionic surfactant of component (C) can be any surfactant commonly used in cosmetics, such as sorbitan fatty acid esters like sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, and sorbitan sesquioleate; glycerin fatty acid esters, diglycerin fatty acid esters, propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyethylene glycol fatty acid esters, alkyl glyceryl ethers, alkyl polyglyceryl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene alkylamines, and polyether-modified silicones such as polyoxyethylene methylpolysiloxane copolymers and poly(oxyethylene oxypropylene) methylpolysiloxane copolymers; and silicone-based surfactants such as polyglycerin-modified silicones, alkyl-modified polyether-modified silicones, and alkyl chain-comodified polyether-modified silicones. Of these, it is preferable to include one or more selected from sorbitan fatty acid esters and polyether-modified silicones that are liquid at 25°C, from the viewpoint of improving the dispersibility of water and water-soluble components in oil.

[0068] Furthermore, the nonionic surfactant of component (C) is preferably a lipophilic nonionic surfactant, from the viewpoint of improving the dispersibility of water and water-soluble components in oil, preferably with an HLB of 2 to 7, and more preferably with an HLB of 3 to 6. Here, HLB (Hydrophilic-Lipophilic Balance) represents the molecular weight of the hydrophilic portion of the total molecular weight of a surfactant, and is determined by Griffin's formula. Furthermore, when a mixture of two or more nonionic surfactants is composed of a mixture, the HLB of the mixture is determined as follows: The HLB of the mixture is obtained by averaging the HLB values ​​of each nonionic surfactant based on their respective blending ratios. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of the nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having an HLBx value.

[0069] As the nonionic surfactant of component (C), commercially available products can be used. For example, as sorbitan monoisostearate, Span 120-LQ (HLB 4.7) (manufactured by Croda), etc.; as polyoxyethylene methylpolysiloxane copolymers, KF-6015 (HLB 4.5), KF-6017 (HLB 4.5), KF-6028 (HLB 4) (all manufactured by Shin-Etsu Chemical Co., Ltd.), SH3775M (HLB 5) (manufactured by Toray Dow Corning Co., Ltd.), etc.; as poly(oxyethylene oxypropylene) methylpolysiloxane copolymers, KF-6012 (HLB 7) (manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL BY 22-008 M (HLB 2), DOWSIL BY 25-337 (HLB 3), DOWSIL ES-5226 (HLB 2), DOWSIL Examples of alkyl-modified polyether-modified silicones include ES-5227 (HLB2) (manufactured by Toray Dow Corning), KF-6038 (HLB3) (manufactured by Shin-Etsu Chemical Co., Ltd.), and ABIL EM 90 (HLB5) (manufactured by Evonik).

[0070] The nonionic surfactant of component (C) can be one or more types, and its content is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1% by mass or more, preferably 10% by mass or less, even more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less. Furthermore, the content of component (C) is preferably 0.1 to 10% by mass of the total composition, more preferably 0.3 to 5% by mass, even more preferably 0.5 to 4% by mass, and even more preferably 1 to 3% by mass.

[0071] In the present invention, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is preferably 0.02 or higher, more preferably 0.03 or higher, even more preferably 0.05 or higher, preferably 2 or lower, more preferably 0.6 or lower, and even more preferably 0.4 or lower, from the viewpoint of achieving a finish that spreads quickly and evenly when applied to the skin, suppresses a powdery feel, has a glossy finish, makes the skin appear moisturized, and gives the skin a firm and uniform feel.

[0072] The powder component (D) can be those commonly used in cosmetics, such as coloring pigments, extender pigments, and luminosity pigments. As coloring pigments, these are those commonly used in cosmetics, such as metal oxides like titanium dioxide, zinc oxide, cerium oxide, aluminum oxide, yellow iron oxide, black iron oxide, red iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes like manganese violet and cobalt titanate; and inorganic pigments like carbon black; Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 2 Examples of synthetic organic pigments include No. 20, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; natural organic pigments such as β-carotene, caramel, and paprika pigment; and composite pigments of these coloring pigments, as well as composite pigments combining these coloring pigments with pearl pigments. Examples of pearl pigments to be processed include natural or synthetic inorganic powders such as mica, phlogopite, talc, silica, sericite, glass, kaolin, bismuth oxychloride, cerium oxide, calcium sulfate, barium sulfate, magnesium sulfate, and plate-shaped alumina powder. Specific examples of composite pigments include titanium dioxide-coated mica, iron oxide-coated mica, iron oxide-coated titanium mica, iron oxide-coated synthetic fluorphlogopite, chromium oxide-coated titanium mica, titanium dioxide-coated glass powder, iron oxide-coated glass powder, titanium dioxide-encapsulated glass powder, and iron oxide-encapsulated glass powder. Of these, metal oxides are preferred, more preferably containing at least one or more selected from titanium dioxide, zinc oxide, yellow iron oxide, black iron oxide, and red iron oxide, and even more preferably containing at least one or more selected from titanium dioxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0073] Examples of extender pigments include those commonly used in cosmetics, such as inorganic extender pigments and composite powders thereof, including magnesium silicate, aluminum silicate, talc, sericite, mica, synthetic fluorophlogopite, glass powder, fluorphlogopite, kaolin, clay, bentonite, hectorite, zeolite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, and magnesium carbonate.

[0074] As for the luminous pigments, those commonly used in cosmetics can be used, such as plate-like powders of mica, synthetic fluorphlogopite, glass, silica, alumina, etc., whose surfaces are coated with colorants such as titanium dioxide, iron oxide, silicon dioxide, Prussian blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, and organic pigments; and film rolls of polyethylene terephthalate / polymethyl methacrylate laminated powder, polyethylene terephthalate / aluminum vapor-deposited powder, polyethylene terephthalate / gold vapor-deposited laminated powder, etc., cut into any shape. Furthermore, organic powders such as polyethylene powder, polypropylene powder, polymethyl methacrylate powder, nylon powder, polytetrafluoroethylene powder, silicone powder, silicone rubber powder, silk powder, urethane powder, cellulose powder, starch powder, and polyfluoroethylene can be used; inorganic powders such as silica, magnesium carbonate, and calcium carbonate; acylated lysine powders such as lauroyl lysine; and metal soap powders, which are metal salts of higher fatty acids, can also be used.

[0075] The powder of component (D) can be used as is, or it can be used after being hydrophobized by a conventional method. Examples of hydrophobic treatments include surface treatments such as fluorine compound treatment, silicone treatment, alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, acylated amino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylate resin treatment, and urethane resin treatment.

[0076] As for the hydrophobic treatment, from the viewpoint of allowing the product to spread quickly and evenly when applied to the skin, a hydrophobic treatment consisting of at least one or more types selected from silicone treatment, amino acid treatment, and acylated amino acid treatment is preferred, and a hydrophobic treatment consisting of at least one or more types selected from amino acid treatment and acylated amino acid treatment is more preferred. Examples of amino acids include proline, hydroxyproline, alanine, glycine, sarcosine, lysine, aspartic acid, and glutamic acid, and their salts are included. Furthermore, the fatty acids constituting the acyl group of the acylated amino acids are preferably fatty acids with 1 to 23 carbon atoms, more preferably fatty acids with 8 to 20 carbon atoms, and among these, stearoyl glutamic acid, lauroyl aspartic acid, dilauroyl glutamic acid lysine, and lauroyl lysine are even more preferred. Examples of salts of these include Na, Ca, Al, Mg, Zn, Zr, and Ti salts. Specifically, products treated with disodium stearoyl glutamate, sodium lauroyl aspartate, etc. are preferred because they offer good adhesion to the skin, a uniform finish, and a lack of powderiness. Among these, products treated with disodium stearoyl glutamate are more preferred. Furthermore, when using the powder of component (D) after hydrophobic treatment, the content of component (D) refers to the total mass including the hydrophobic treated agent.

[0077] Component (D) can be one or more types, and its content is preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 5% by mass or more, preferably 40% by mass or less, more preferably 35% by mass or less, and even more preferably 30% by mass or less, from the viewpoint of suppressing the powdery texture of the finished product and obtaining a uniform finish. Furthermore, the content of component (D) is preferably 1 to 40% by mass, more preferably 2 to 35% by mass, and even more preferably 5 to 30% by mass, from the total composition.

[0078] In the emulsified cosmetic composition of the present invention, the content of (E) water is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 25% by mass or more, preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of maintaining the emulsified form and having excellent usability. Furthermore, the content of component (E) is preferably 10 to 60% by mass, more preferably 20 to 55% by mass, and even more preferably 25 to 50% by mass, from the viewpoint of maintaining the emulsified form and having excellent usability.

[0079] In the present invention, the mass ratio (E) / (B) of component (E) to component (B) is preferably 1 or more, more preferably 2 or more, even more preferably 4 or more, preferably 25 or less, more preferably 15 or less, and even more preferably 8 or less, from the viewpoint of suppressing the powdery feel of the finished product, having a glossy finish, making the skin appear moisturized, and providing a firm and uniform finish to the skin.

[0080] The emulsified cosmetic composition of the present invention may further contain a phenyl-modified silicone that is liquid at (F)25℃, and can provide a glossy, moisturized appearance, firmness, and an even finish. Liquid means having fluidity, and also includes cream and paste forms. Examples of phenyl-modified silicones that are liquid at 25°C include phenyl trimethicone, diphenylsiloxyphenyl trimethicone, diphenyl dimethicone, trimethylsiloxyphenyl dimethicone, trimethylpentaphenyltrisiloxysane, and methylphenylpolysiloxane. In particular, phenyl trimethicone and methylphenylpolysiloxane are preferred because they provide a glossy finish, make the skin appear moisturized, and give the skin a firm and even appearance.

[0081] The viscosity of component (F) at 25°C is 4000 mm². 2 Preferably it is less than / s, and 600mm2 / s or less is more preferable, 200mm 2 / s or less is even more preferable, 50mm 2 / s or less is even more preferable. Viscosity is measured using a Type B viscometer (Toki Sangyo Co., Ltd.: TVB-10M) at 25°C, with SPINDLE No. M1 rotating at 6 rpm for 1 minute.

[0082] The component (F) is phenyl trimethicone, specifically SH556 (manufactured by Toray Dow Corning, viscosity 22 mm). 2 / s), as diphenylsiloxyphenyl trimethicone, KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd., viscosity 15 mm) 2 / s), as diphenyl dimethicone, KF-50 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-53 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-54 (manufactured by Shin-Etsu Chemical Co., Ltd., 400mm 2 / s), as trimethylsiloxyphenyl dimethicone, PDM-1000 (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.), as trimethylpentaphenyltrisiloxysane, PH-1555 HRI CF (manufactured by Toray Dow Corning Co., Ltd., 175mm 2 As methylphenylpolysiloxane, commercially available products such as KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd.) and as diphenylsiloxyphenyl trimethicone, DOWSIL FZ-209 (manufactured by Toray Dow Corning Co., Ltd.) can be used.

[0083] Component (F) can be one or more types, and its content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, preferably 20% by mass or less, more preferably 12% by mass or less, and even more preferably 8% by mass or less, from the viewpoint of obtaining a glossy, moisturized appearance, firmness, and even finish in the total composition. Furthermore, the content of component (F) is preferably 0.1 to 20% by mass, more preferably 0.5 to 12% by mass, and even more preferably 1 to 8% by mass, from the total composition.

[0084] In addition to the above-mentioned components, the emulsified cosmetic composition of the present invention may contain components commonly used in cosmetics, such as oil components other than those mentioned above, polymer compounds other than those mentioned above, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, moisturizers, cooling agents, and the like.

[0085] The emulsified cosmetic composition of the present invention can be manufactured according to conventional methods and can be in the form of liquid, lotion, paste, cream, gel, solid, or other dosage forms.

[0086] The emulsified cosmetic composition of the present invention may be either a water-in-oil emulsion or an oil-in-water emulsion, but is preferably a water-in-oil emulsion. Furthermore, the emulsified cosmetic composition of the present invention can be applied as, for example, makeup cosmetics such as makeup base, foundation, concealer, blush, eyeshadow, mascara, eyeliner, eyebrow products, overcoat agents, and lipstick; as well as UV protection cosmetics such as sunscreen lotion and sunscreen cream, and is suitable as a makeup cosmetic composition. [Examples]

[0087] Manufacturing Example 1 (Manufacturing of poly(N-propionylethyleneimine) modified silicone) 12.9 g (0.13 mol) of 2-ethyl-2-oxazoline and 27.7 g of ethyl acetate were mixed, and the mixture was dehydrated with 2.0 g of molecular sieve (Zeolam A-4, manufactured by Tosoh Corporation) at 28°C for 15 hours. Furthermore, 100 g of side-chain primary aminopropyl-modified polydimethylsiloxane (KF-8015, manufactured by Shin-Etsu Silicone Co., Ltd., weight-average molecular weight 100,000, amine equivalent 20,000) and 203 g of ethyl acetate were mixed, and the mixture was dehydrated with 15.2 g of molecular sieve at 28°C for 15 hours. To an ethyl acetate solution of the above-mentioned dehydrated 2-ethyl-2-oxazoline, 0.77 g (0.005 mol) of diethyl sulfate was added, and the mixture was heated under reflux at 80°C for 8 hours under a nitrogen atmosphere to synthesize terminally reactive poly(N-propionylethyleneimine). The number-average molecular weight measured by GPC was 2700. This terminally reactive poly(N-propionylethyleneimine) solution was added all at once to the dehydrated side-chain primary aminopropyl-modified polydimethylsiloxane solution, and the mixture was heated under reflux at 80°C for 10 hours. The reaction mixture was concentrated under reduced pressure to obtain the N-propionylethyleneimine-dimethylsiloxane copolymer as a white, rubbery solid (108 g). The mass ratio of organopolysiloxane segments in the final product was 0.87, and the weight-average molecular weight of the final product was 115,000.

[0088] Examples 1-10 and Comparative Example 1 Water-in-oil emulsion cosmetics (foundations) with the compositions shown in Tables 1 and 2 were manufactured, and their speedy spreadability on the skin, even spreadability, powder-free finish, glossy finish, moisturized finish, firm finish, and uniform finish were evaluated. The results are shown in Tables 1 and 2.

[0089] (Manufacturing method) The powder phase component containing component (D) was mixed and ground, and added to the oil phase component containing separately mixed components (A), (B), and (C), and dispersed in a disperser. Then, the aqueous phase component containing component (E) was added, dispersed in a disperser, and stirred with a homomixer to obtain a water-in-oil emulsion cosmetic (foundation).

[0090] (Evaluation method) (1) Spreads quickly on the skin: Five expert panelists conducted a sensory evaluation of the speed and spreadability of each water-in-oil emulsion cosmetic (foundation) when applied to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; It spreads very quickly on the skin. 4; Spreads quickly on the skin. 3; Spreads relatively quickly on the skin. 2; It doesn't spread very quickly on the skin. 1. It doesn't spread quickly on the skin.

[0091] (2) Even spread on the skin: Five expert panelists conducted a sensory evaluation of the even spreadability of each water-in-oil emulsion cosmetic (foundation) when applied to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; It doesn't leave unevenness on the skin. 4; It doesn't leave much unevenness on the skin. 3; The skin may appear slightly uneven. 2; The skin may become uneven. 1; The skin becomes quite uneven.

[0092] (3) A finish without a powdery feel: Five expert panelists conducted a sensory evaluation of each water-in-oil emulsion cosmetic (foundation) after application to the skin, assessing the powder-free finish according to the following criteria. The results are shown as the total scores from the five panelists. 5; It has absolutely no powdery feel. 4; It doesn't feel powdery. 3; It doesn't have much of a powdery feel. 2; It has a slightly powdery texture. 1; It has a powdery texture.

[0093] (4) Glossy finish: Five expert panelists conducted a sensory evaluation of the glossy finish achieved after applying each water-in-oil emulsion cosmetic (foundation) to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; It has a very glossy finish. 4; It has a glossy finish. 3; It has a slight sheen. 2; It doesn't have much shine. 1. It lacks shine.

[0094] (5) A moisturizing finish: Five expert panelists conducted a sensory evaluation of the moisturizing finish achieved after applying each water-in-oil emulsion cosmetic (foundation) to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; My skin looks much more moisturized. 4. The skin looks moisturized. 3; The skin looks slightly more moisturized. 2; My skin doesn't look very moisturized. 1. My skin doesn't look moisturized.

[0095] (6) A firm finish: Five expert panelists conducted a sensory evaluation of the firming effect of each water-in-oil emulsion cosmetic (foundation) after applying it to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; It has a very firm feel. 4; It has a firm texture. 3; It has a slightly firm texture. 2; It doesn't have much firmness. 1; It lacks firmness.

[0096] (7) A uniform finish: Five expert panelists conducted a sensory evaluation of the uniform finish achieved after applying each water-in-oil emulsion cosmetic (foundation) to the skin, using the following criteria. The results are shown as the total scores from the five panelists. 5; The finish is quite uniform. 4. The finish is uniform. 3; The finish is somewhat uniform. 2. The finish is not very uniform. 1. The finish is not uniform.

[0097] [Table 1]

[0098] [Table 2]

[0099] Examples 11-15 Water-in-oil emulsion cosmetics (foundations) with the compositions shown in Tables 3 and 4 were prepared in the same manner as in Examples 1 to 10. All of the resulting water-in-oil emulsion cosmetics spread quickly and evenly when applied to the skin, resulting in a finish that is less powdery, glossy, makes the skin appear moisturized, firm, and even.

[0100] [Table 3]

[0101] [Table 4]

Claims

1. The following components (A), (B), (C), (D) and (E): (A) an oily gelling agent, (B) 0.1 to 30 mass% of a hydrocarbon oil that is liquid at 25°C, (C) a nonionic surfactant, (D) powder, (E) Water An emulsion cosmetic comprising:

2. 2. The emulsion cosmetic according to claim 1, wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.02 to 2.

3. The emulsion cosmetic according to claim 1, wherein component (A) is one or more selected from organopolysiloxanes formed by bonding poly(N-acylalkyleneimine) segments, styrene copolymers, glycerin fatty acid esters that are solid at 25°C, dextrin fatty acid esters, and organically modified clay minerals.

4. 4. The emulsion cosmetic according to claim 2 or 3, wherein the content of component (A) is 0.3 to 10 mass %, and the content of component (C) is 0.1 to 10 mass %.

5. 4. The emulsion cosmetic according to claim 2, wherein the mass ratio (E) / (B) of the component (E) to the component (B) is 1 to 25.

6. The emulsion cosmetic according to claim 2 or 3, further comprising: (F) 0.1 to 20 mass % of a phenyl-modified silicone that is liquid at 25° C.

7. 4. The emulsion cosmetic according to claim 2 or 3, which is a water-in-oil emulsion cosmetic.