WO2023118924A1

WO2023118924A1 - Water-in-oil emulsified cosmetic composition

Info

Publication number: WO2023118924A1
Application number: PCT/IB2021/000962
Authority: WO
Inventors: Kenta FUJIOKA; Hideshi GOHARA; Koichi Hata
Original assignee: Lvmh Recherche
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2023-06-29

Abstract

The present invention provides a water-in-oil emulsified cosmetic composition comprising (A) a hydrophobically-treated pigment comprising (A1) an inorganic pigment treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms, (B) a silicon film-forming polymer, (C) a silicone-based surfactant, (D) an organically modified clay mineral, (E) an oil optionally comprising (E1) a non-volatile oil, and (F) an aqueous medium

Description

WATER-IN-OIL EMULSIFIED COSMETIC COMPOSITION

Technical Field

[0001] The present invention relates to a water-in-oil emulsified cosmetic composition.

Background Art

[0002] Foundations are used for beautification of skin to make skin irregularities and pores less noticeable, and they are provided in various forms such as powders, liquids and creams. In recent years there has been increasing focus on the cosmetic long-lasting property of liquid foundations. More specifically, there is demand to not only increase the durability of makeup films, but also to prevent change in their initial shade throughout the day. That is, the long-lasting property of the initial shade is also considered to be as important as the cosmetic long-lasting property and high coverage effect.

[0003] In the midst of the current CO VID- 19 pandemic, the habit of wearing masks has become generally essential. In light of this situation it has become important for foundations to have the property of not becoming transferred to masks (a non-transfer property), in addition to the properties mentioned above. Conventionally, however, wearing of masks over makeup has been rare or only for short periods, and therefore the non- transfer property of foundations has not been an issue and compositions have not been designed for that purpose. [0004] Foundations usually contain added inorganic powders for the purpose of coloration and/or protection from ultraviolet rays. However, since inorganic powders alone have insufficient dispersibility in oil components, often causing problems of product stability (particularly stability in an emulsified state), known techniques are applied using surface hydrophobic agents on their surfaces. Various types of hydrophobic agents are used, one example being the surface-treated powder disclosed in Japanese Unexamined Patent Publication No. 2011-213662, wherein the powder has the surface covered by an esterified product of dextrin and a fatty acid of 12 to 22 carbon atoms in which the dextrin has a mean polymerization degree of 3 to 150 and the fatty acid of 12 to 22 carbon atoms includes a predetermined amount of a branched fatty acid and the degree of substitution of the fatty acid is 1.0 to 3.0 per glucose unit. In Japanese Unexamined Patent Publication No. 2012-116822, an esterified product of dextrin and a fatty acid is disclosed. This esterified product of dextrin and a fatty acid, the dextrin has a mean polymerization degree of glucose of 3 to 150, the fatty acid contains 1, 2 or more branched saturated fatty acids having 4 to 26 carbon atoms in an amount of more than 50 mol% and 100 mol% or less based on all fatty acids, and 1, 2 or more selected from the group consisting of linear saturated fatty acids having 2 to 22 carbon atoms, linear or branched unsaturated fatty acids having 6 to 30 carbon atoms and cyclic saturated or unsaturated fatty acids having 6 to 30 carbon atoms in an amount of 0 mol% to less than 50 mol% based on all fatty acids, and the degree of substitution of fatty acids per glucose unit is 1.0 to 3.0.

Summary of Invention

Technical Problem [0005] It is an object of the invention to provide a cosmetic composition that has not only a long-lasting initial shade but also an excellent non- transfer property for materials (especially masks) that contact with the skin. Solution to Problem

[0006] The present invention provides a water-in-oil emulsified cosmetic composition comprising (A) a hydrophobically-treated pigment comprising (A1) an inorganic pigment treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms, (B) a silicon film-forming polymer, (C) a silicone-based surfactant, (D) an organically modified clay mineral, (E) an oil optionally comprising (E1) a non-volatile oil, and (F) an aqueous medium.

[0007] The cosmetic composition of the invention has not only a long- lasting initial shade but also an excellent non-transfer property for materials that contact with the skin. The cosmetic composition of the invention has an excellent long-lasting makeup effect and coverage effect, and can produce a thin film finish when the cosmetic composition is applied onto skin. The cosmetic composition itself also has excellent stability.

[0008] Without being limited to any particular theory, it is believed that the reason that conventional water-in-oil emulsified foundations do not have a long-lasting initial shade is that the volatile oils in the makeup film formed on the skin volatilize with the passage of time, resulting in gradual aggregation of the initially dispersed inorganic pigments. It is believed that such aggregation of inorganic pigments is prevented by using component (A) including component (A1), together with component (B) to (F), according to the present invention.

[0009] In a conventional water-in-oil (W/O) type composition it has not been possible to improve the non-transfer property onto masks and the like due to adhesion of the makeup film and the size of the film thickness, but with the composition comprising components (A) to (F), adhesion of the makeup film is reduced while the function of component (A1) allows the makeup film to be formed uniformly and with a small thickness, the overall effect being that the non-transfer property for masks and similar materials is vastly improved.

[0010] Component (A1) preferably comprises titanium dioxide and iron oxide, both of which are treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms. By using titanium dioxide and iron oxide as inorganic pigments treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms, and especially using the three types of yellow, red and black iron oxide, their combination with titanium dioxide can produce makeup films with different colors.

[0011] Component (B) is preferably selected from the group consisting of silicone resins such as MQ resin, MQ-T resin and a mixture thereof, and silicone (meth) acrylates such as (acrylate/polydimethylsiloxane) copolymer and (acrylate/polytrimethylsiloxy methacrylate) copolymer. By using these for component (B), the long-lasting initial shade and non- transfer property can be further improved. In addition, make-up lasting effect and coverage effect can be significantly improved. [0012] From the viewpoint of improving these properties, component (C) is preferably a polydimethylsiloxane wherein the methyl group has been partially replaced with a hydrophilic group and optionally with a non- hydrophilic group, the hydrophilic group comprises a polyether-containing group and the non-hydrophilic group comprises at least one from among polydimethylsiloxane-containing groups and C₁₂ to C₂₂ alkyl groups. A particularly high effect of improving the long-lasting initial shade, non- transfer property and stability of the water-in-oil emulsified cosmetic composition is obtained with a polydimethylsiloxane in which the methyl group has been partially replaced with a polyether-containing group, a polydimethylsiloxane in which the methyl group has been partially replaced with a polyether-containing group and a polydimethylsiloxane- containing group, a polydimethylsiloxane in which the methyl group has been partially replaced with a polyether-containing group and a C₁₂ to C₂₂ alkyl group, or a polydimethylsiloxane in which the methyl group has been partially replaced with a polyether-containing group, a polydimethylsiloxane-containing group and a C₁₂ to C₂₂ alkyl group. [0013] From the viewpoint of further improving these properties, the content of component (C), component (A1) and component (E1) may be respectively greater than 1 mass%, greater than 3 mass% and less than 10 mass%, based on the total mass of the water-in-oil emulsified cosmetic composition.

[0014] The content of component (C) may be 1 to 6 mass%, 1 to 5.5 mass% or 1 to 5 mass%. The content of component (A1) may be 3 to 35 mass%, 5 to 30 mass% or 10 to 25 mass%. The content of component (E1) may be 0.1 to 10.0 mass%, 0.5 to 9.5 mass% or 1.0 to 9.0 mass%. These amounts are all based on the total mass of the water-in-oil emulsified cosmetic composition.

[0015] The ratio of the mass of component (B) to the total mass of component (C) and component (E1) is preferably 0.1 to 9.0. When the ratio is within this range, non-transfer property can be further improved and a thin film finish is possible. The ratio of the mass of component (B) to the total mass of component (C) and component (E1) may be 0.15 to 9.0, or 0.2 to 9.0.

[0016] When component (B) is selected from among the group consisting of MQ resin, MQ-T resin and a mixture thereof, component (C) is preferably selected from among the group consisting of PEG/PPG-18/18 dimethicone and PEG/PPG-19/19 dimethicone, in which case the contents of component (A1), component (C) and component (E1) are respectively greater than 3 mass%, greater than 1 mass% and less than 4 mass%, based on the total mass of the water-in-oil emulsified cosmetic composition, and the ratio of the mass of component (B) to the total mass of component (C) and component (E1) is preferably 0.4 to 9.0. Such a composition will maintain a high long-lasting initial shade and non-transfer property while also increasing the long-lasting makeup effect, coverage effect and thin film finish, and the cosmetic composition itself will also have satisfactory stability.

[0017] In this regard, the content of component (A1) may be 3 to 35 mass%, 5 to 30 mass% or 10 to 25 mass%. The content of component (C) may be 1 to 4 mass%, 1.2 to 3.0 mass% or 1.5 to 2.5 mass%. The content of component (E1) may be 0.1 to 4.0 mass%, 0.5 to 3.0 mass% or 1.0 to 2.0 mass%. These amounts are all based on the total mass of the water-in-oil emulsified cosmetic composition.

[0018] In this regard, the ratio of the mass of component (B) to the total mass of component (C) and component (E1) may be 0.4 to 9.0, 0.8 to 9.0 or 1.2 to 9.0. [0019] When component (B) is selected from among the group consisting of MQ resin, (acrylate/dimethicone) copolymers and (acrylate/polytrimethylsiloxy methacrylate) copolymers, component (C) is preferably selected from among the group consisting of PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG/PPG-10/1 dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, in which case the contents of component (A1), component (C) and component (E1) are respectively greater than 3 mass%, greater than 2 mass% and less than 10 mass%, based on the total mass of the water-in-oil emulsified cosmetic composition, and the ratio of the mass of component (B) to the total mass of component (C) and component (E1) is preferably 0.1 to 2. Such a composition will maintain a high long-lasting initial shade and non-transfer property while also increasing the long-lasting makeup effect, coverage effect and thin film finish, and the cosmetic composition itself will also have satisfactory stability,

[0020] In this regard, the content of component (A1) may be 3 to 35 mass%, 5 to 30 mass% or 10 to 25 mass%. The content of component (C) may be 2.0 to 6.0 mass%, 3.0 to 5.0 mass% or 3.5 to 4.5 mass%. The content of component (E1) may be 5 to 10 mass%, 6.0 to 9.5 mass% or 7.0 to 9.0 mass%. These amounts are all based on the total mass of the water- in-oil emulsified cosmetic composition.

[0021] In this regard, the ratio of the mass of component (B) to the total mass of component (C) and component (E1) may be 0.15 to 2.0 or 0.2 to 2.0.

[0022] The water-in-oil emulsified cosmetic may also comprise (G) a spherical powder composed of at least one powder the component of which is selected from the group consisting of silica, cellulose and starch. Adding such spherical powder increases the long-lasting initial shade.

[0023] The present invention provides the aforementioned water-in-oil emulsified cosmetic composition, wherein component (B) is selected from the group consisting of MQ resin, MQ-T resin and a mixture thereof, component (C) is selected from the group consisting of PEG/PPG-18/18 dimethicone and PEG/PPG- 19/19 dimethicone, component (E) comprises (E1) a non-volatile oil and (E2) a volatile oil and component (F) comprises water and a polyol having 2 to 8 carbon atoms. The water-in-oil emulsified cosmetic composition has a particularly excellent non-transfer property. [0024] The present invention also provides the aforementioned water-in- oil emulsified cosmetic composition wherein component (B) is selected from the group consisting of MQ resin, (acrylate/dimethicone) copolymers and (acrylate/polytrimethylsiloxy methacrylate) copolymers and component (C) is selected from the group consisting of PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG/PPG-10/1 dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, component (E) comprises (E1) a non-volatile oil and (E2) a volatile oil, and component (F) comprises water and a mono-alcohol of 2 to 3 carbon atoms and (G) a spherical powder composed of at least one powder the component of which is selected from the group consisting of silica, cellulose and starch. The water-in-oil emulsified cosmetic composition has a particularly excellent long-lasting initial shade.

[0025] The present invention provides a cosmetic process for caring for and/or making-up keratinic materials, comprising the application onto keratinic materials, in particular onto skin, of the water-in-oil emulsified cosmetic composition.

[0026] The present invention also provides a cosmetic process, wherein the water-in-oil emulsified cosmetic composition provides to the keratinic materials on which it is applied, a long-lasting initial shade and a non- transfer property.

Advantageous Effects of Invention

[0027] The present invention provides a cosmetic composition that has not only a long-lasting initial shade but also an excellent non-transfer property for materials (especially masks) that contact with the skin.

Description of Embodiments

[0028] The cosmetic composition of this embodiment comprises (A) a hydrophobically-treated pigment, where component (A) comprises (A1) an inorganic pigment treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms. The dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms is a hydrophobic agent for component (A1).

[0029] Examples of inorganic pigments for component (A) include metal oxides such as titanium dioxide, iron oxide, zinc oxide, cerium oxide, aluminum oxide, bengala, Prussian blue, chromium oxide and chromium hydroxide, metal complexes such as manganese violet and cobalt titanate, and carbon black. Titanium dioxide is known as a white pigment, and iron oxide is known as a red, yellow or black colored pigment. These may be appropriately combined for adjustment to a desired color tone. The aforementioned metal oxides are known as ultraviolet scattering agents. A metal oxide particle diameter of 100 to 500 nm increases the scattering effect for ultraviolet rays. A metal oxide microparticle powder (particle size: <100 nm) may also be used, and the microparticle powder may form aggregates or condensates.

[0030] Examples for the dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms include dextrin isopalmitate, dextrin isostearate, dextrin isoarachate and dextrin 18-methyleicosanoate. Dextrin isostearate is preferred among these. The dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms is preferably dextrin esterified with a branched fatty acid having 16, 18, 20 or 22 carbon atoms, and component (A) most preferably comprises titanium dioxide or iron oxide that has been surface-treated with dextrin isostearate.

[0031] The dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms can be represented by the following general formula (la) or (lb), for example. The letter "A" in the following general formula represents a residue of removing an OH group from a fatty acid having 16 to 22 carbon atoms, where at least some or all of the residues are residues of removing an OH group from a branched fatty acid having 16 to 22 carbon atoms. The "A” portion may be a hydrogen atom, or a residue remaining after removing an OH group from a fatty acid other than a fatty acid having 16 to 22 carbon atoms. The symbol indicates a bonding site.

[Chemical Formula 1]

[0032] In general formula (la) or (lb), the fatty acid other than a branched fatty acid having 16 to 22 carbon atoms may be, for example, a straight- chain saturated fatty acid of 2 to 22 carbon atoms such as acetic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid or behenic acid; or a branched saturated fatty acid of 4 to

14 carbon atoms such as isobutyric acid, isovaleric acid, 2-ethylbutyric acid, ethylmethylacetic acid, isoheptanoic acid, 2-ethylhexanoic acid, isononanoic acid, isodecanoic acid, isotridecanoic acid or isomyristic acid. Fatty acids other than branched fatty acids having 16 to 22 carbon atoms may also be straight-chain or branched unsaturated fatty acids of 6 to 30 carbon atoms, including monoenoic unsaturated fatty acids such as cis-4- decenoic (obtusilic) acid, 9-decenoic (caproleic) acid, cis-4-dodecenoic (linderic) acid, cis-4-tetradecenoic (tsuzuic) acid, cis-5 -tetradecenoic (physeteric) acid, cis-9-tetradecenoic (myristoleic) acid, cis-6-hexadecenoic acid, cis-9-hexadecenoic (palmitoleic) acid, cis-9-octadecenoic (oleic) acid, trans-9 -octadecenoic acid (elaidic acid), cis-11-octadecenoic (asclepinic) acid, cis-11-eicosenoic (gondoic) acid, cis-17-hexacosenoic (ximenic) acid and cis-21-triacontenoic (lumequeic) acid; and polyene unsaturated fatty acids such as sorbic acid, linoleic acid, hiragonic acid, punicic acid, a- linolenic acid, γ-linolenic acid, moroctic acid, stearidonic acid, arachidonic acid, EPA, clupanodonic acid, DHA, herring acid, stearolic acid, crepenynic acid and ximenynic acid. Fatty acids other than branched fatty acids having 16 to 22 carbon atoms may also be saturated or unsaturated fatty acids of 6 to 30 carbon atoms having a cyclic structure in at least part of the basic backbone, such as 9,10-methylene-9-octadecenoic acid, aleprylic acid, alepric acid, gorlic acid, a-cyclopentyl acid, u-cyclohexyl acid, a-cyclopentylethyl acid, a-cyclohexylmethyl acid, co-cyclohexyl acid, 5(6)-carboxy-4-hexyl-2-cyclohexen-1-octanoic acid, malvalic acid, sterculic acid, hydnocarpic acid and chaulmoogric acid.

[0033] Component (A) may also comprise (A2) a hydrophobically-treated pigment other than component (A1). Component (A2) may be an inorganic pigment which is a hydrophobically-treated pigment surface-treated with a hydrophobic agent other than that used for component (A1). The other hydrophobic agent may be one or more selected from the group consisting of silicone compounds, fluorine compounds, oils, fats, phospholipids, amino acids, higher alcohols, waxes, polymers and resins.

[0034] The content of component (A1) among component (A) may be 80 to 100 mass%, 90 to 100 mass% or 95 to 100 mass%, or even 100 mass%, based on the total mass of component (A). Component (A) is preferably 1 to 40 mass%, more preferably 3 to 35 mass% and even more preferably 5 to 30 mass%, based on the total mass of the cosmetic composition. If the contents of component (A) and component (A1) are within these ranges, the cosmetic composition itself will have not only an initial shade lasting effect, a long-lasting makeup effect and coverage effect, but also a thin film finish when the cosmetic composition has been applied onto skin, and excellent stability of the cosmetic composition itself. Component (A1) may be present at 3 mass% or greater, 3 to 35 mass%, 5 to 30 mass% or 10 to 25 mass%, based on the total mass of the cosmetic composition.

[0035] The cosmetic composition of this embodiment comprises (B) a silicon film-forming polymer. Component (B) is a polymer with silicon, such as a siloxane structure, which forms a film after being applied onto skin. By causing formation of a thin-film on skin with component (B), the powder components such as component (A) and component (G) tend to remain more easily on the skin. Since a firm coated film is formed by component (B), the coverage effect and long-lasting effect are increased and breakup of the cosmetic is less likely to occur. Since the powder also more easily remains in the film, the cosmetic is less likely to be transferred onto masks or clothing. Examples for component (B) include silicone resins and acrylate/silicon copolymers.

[0036] Examples of silicone resins include fluorine-modified silicone resins (for example, trifluoroalkyl dimethyl trimethylsiloxysilicates), MQ resins (for example, trimethylsiloxysilicate), MT resins (for example, polymethylsilsesquioxane), MQ-T resins (for example, mixtures or reaction products of trimethylsiloxysilicate and polymethylsilsesquioxane, or mixtures or reaction products of trimethylsiloxysilicate and dimethiconol), and silicone (meth) acrylate (for example, vinyl polymers with carbosiloxane dendrimer structures, such as acrylate/dimethicone copolymer or Acrylates/polytrimethylsiloxymethacrylate copolymer). [0037] A silicone resin is sometimes handled in a state dissolved in a volatile oil, and in some cases it may be utilized together with a volatile oil. Methyltrimethicone, dimethicone, isododecane and butyl acetate are used as such volatile oils. The amount of volatile oil that may be introduced together with the silicone resin is also summed in as the amount of volatile oil (E2) described below. Examples of such silicone resins include KF- 7312T (trade name of Shin-Etsu Chemical Co., Ltd.), KF-549 (trade name of Shin-Etsu Chemical Co., Ltd.) and DOWSIL FA4004 ID Silicone Acrylate (The Dow Chemical Company). Silicone resins in solid pure form without solvent dilution may also be used. BELSIL PMS MK (trade name of Wacker Asahi Kasei Silicone Co., Ltd.) is an example of a marketed product, and it may also be dissolved in a solvent as appropriate. [0038] The content of component (B) may be 1 to 12 mass%, 1.5 to 10 mass% or 2 to 8 mass%, based on the total mass of the cosmetic composition.

[0039] The cosmetic composition of this embodiment comprises (C) a silicone-based surfactant. Component (C) has a chemical structure with a hydrophilic group introduced into a polysiloxane backbone.

[0040] Component (C) is preferably a polydimethylsiloxane in which the methyl group has been partially replaced with a hydrophilic group and optionally with a non-hydrophilic group and wherein the hydrophilic group comprises a polyether-containing group and the non-hydrophilic group comprises at least one from among polydimethylsiloxane-containing groups and C₁₂ to C₂₂ alkyl groups. Polyether-containing groups preferably have a polyoxyethylene backbone, a polyoxypropylene backbone, or a polyoxyethylene backbone and a polyoxypropylene backbone. C₁₂ to C₂₂ alkyl groups include C₁₂ to alkyl groups and C₁₂ to C₁₆ alkyl groups. [0041] Component (C) may be a polydimethylsiloxane wherein the methyl group has been partially replaced with a polyether-containing group (for example, PEG/PPG-18/18 Dimethicone). This compound is particularly effective for improving the non-transfer property. Component (C) may be a polydimethylsiloxane wherein the methyl group has been partially replaced with a polyether-containing group and a polydimethylsiloxane- containing group (for example, PEG-9 Polydimethylsiloxyethyl Dimethicone), a poly dimethylsiloxane wherein the methyl group has been partially replaced with a polyether-containing group and a C₁₂ to C₂₂ alkyl group (for example, Cetyl PEG/PPG-10/1 Dimethicone), and a polydimethylsiloxane wherein the methyl group has been partially replaced with a polyether-containing group, a polydimethylsiloxane-containing group and a C₁₂ to C₂₂ alkyl group (for example, Lauryl PEG- 9 Polydimethylsiloxyethyl Dimethicone). This compound is particularly effective for improving the long-lasting initial shade.

[0042] The content of component (C) may be 1 to 6 mass%, 1 to 5.5 mass% or 1 to 5 mass%, based on the total mass of the cosmetic composition.

[0043] The cosmetic composition of this embodiment comprises (D) an organically modified clay mineral. Component (D) is clay that has been modified to hydrophobicity with an organic molecule, and it has a thickening effect. [0044] Examples of clay to be used for component (D) include kaolinite, dickite, nacrite, donbassite, antigorite, berthierine, pyrophyllite, montmorillonite, beidellite, vermiculite, talc, stevensite, hectorite, saponite, chlorite and sepiolite, which are modified to hydrophobicity with organic molecules, Examples of organic molecules include quaternary ammonium salts, and more specifically disteardimonium chloride and stearalkonium chloride. Examples for component (D) include disteardimonium hectorite and stearalkonium hectorite.

[0045] Component (D) may be handled in a state dispersed in a volatile oil and/or a non-volatile oil, in which case it may be utilized together with a volatile oil and/or a non-volatile oil. The amounts of the volatile oil or non-volatile oil copresent in component (D) may each be summed in as the amounts of volatile oil or non-volatile oil described below. Volatile oils or non-volatile oils to be present with component (D) include those mentioned below for component (E). As the component (D), there is a BENTON GEL series (product name, manufactured by E1ementis) such as BENTONE GEL ISD V.

[0046] By comprising component (D), the, stability of the emulsified state is improved, the water resistance and sebum resistance after skin application are also excellent, and bleeding of sebum and the like can be inhibited. The content of component (D) may be 0.05 to 2.5 mass%, 0.1 to 2.0 mass% or 0.4 to 1.5 mass%, based on the total mass of the cosmetic composition.

[0047] The cosmetic composition of this embodiment comprises (E) an oil, and optionally (E1) a non-volatile oil. Component (E) may consist entirely of (E2) a volatile oil, but it preferably comprises (E1) a non-volatile oil and (E2) a volatile oil. [0048] Component (E1) may be a cycloalkylene carbonate (for example, propylene carbonate), a fatty alcohol of 8 to 22 carbon atoms (for example, octyldodecanol), a fatty acid ester of a monohydric or polyhydric alcohol (for example, isopropyl myristate, isononyl isononanoate, pentaerythrityl tetraisostearate or castor oil), an alkyl benzoate, an aliphatic hydrocarbon (for example, polyisobutene hydride), liquid lanolin, olive oil, mineral oil, squalene, an aromatic polysiloxane (for example, phenyltrimethicone), polysiloxane (eg, dimethicone whose viscosity is more than 2cs, preferably 5cs or more), UV absorbers (for example, ethylhexyl salicylate), surfactant other than (C) a silicone-based surfactant (for example, polyglyceryl-3 diisostearate). A non-volatile oil is a non-volatile oil component that is liquid in an environment at ordinary temperature (in the range of 15 to 25°C) and ordinary pressure (1 atmosphere).

[0049] The content of component (E1) may be 0.1 to 10.0 mass%, 0.5 to 9.5,mass% or 1.0 to 9.0 mass%, based on the total mass of the cosmetic composition.

[0050] Component (E2) is a vaporizing oil component that is liquid and gradually gasifies in an ordinary temperature, ordinary pressure environment. Examples for component (E2) include cyclopentasiloxane, methyltrimethicone, octamethyltrisiloxane, dimethicone viscosity of which is 2cs or less, butyl acetate, isododecane, isohexadecane and petroleum volatiles.

[0051] Dimethicone has a high boiling point (for example, ≥ 250 °C), depending on the molecular weight (or viscosity), and is sometimes treated as a non-volatile oil.

[0052] The content of component (E2) may be 5 to 60 mass%, 10 to 50 mass% or 15 to 40 mass%, based on the total mass of the cosmetic composition. [0053] The content of component (E) may be 5 to 70 mass%, 10 to 60 mass% or 15 to 50 mass%, based on the total mass of the cosmetic composition.

[0054] The cosmetic composition of this embodiment also includes (F) an aqueous medium. Component (F) comprises (F1) water, and may also comprise either or both (F2) a polyol and (F3) a mono-alcohol. The content of component (F) is preferably 20 to 70 mass%, and may be 30 to 60 mass% or 40 to 50 mass%, based on the total mass of the cosmetic composition. If the content of component (F) is within this range, the fresh sensation will increase and a more excellent comfortable texture can be obtained. A content of component (F) within this range will also further improve the high coverage effect and stability.

[0055] Examples for (F1) include polyols of 1 to 8 carbon atoms.

Examples of polyols of 1 to 8 carbon atoms include ethylene glycol, 1,2- propylene glycol, 1,3-propylene glycol, glycerin, 1,3 -butylene glycol, 1,2- pentanediol, 1 ,2-hexanediol and 1,2-octanediol. The content of component (F1) may be 0.1 to 20.0 mass%, 0.5 to 10.0 mass% or 1.0 to 5.0 mass%, based on the total mass of the cosmetic composition.

[0056] Examples for component (F2) include mono-alcohols of 2 to 3 carbon atoms. Examples of mono-alcohols of 2 to 3 carbon atoms include ethanol, 1 -propanol and 2-propanol (isopropanol). The content of component (F2) may be 1 to 25 mass%, 2 to 20 mass% or 5 to 15 mass%, based on the total mass of the cosmetic composition.

[0057] The cosmetic composition of this embodiment may also contain (G) a spherical powder. Component (G) may be a spherical powder composed of at least one powder the component of which is selected from the group consisting of silica, cellulose and starch, with silica preferably being hydrophobic silica. The content of component (G) may be 1 to 20 mass%, 2 to 15 mass% or 5 to 10 mass%, based on the total mass of the cosmetic composition.

[0058] The cosmetic composition of this embodiment may further comprise a stabilizer such as salts, an antimicrobial agent, antioxidant, aromatic or active ingredients,

[0059] The cosmetic of this embodiment has a viscosity at 25°C of preferably 100 mPa·s or higher and more preferably 300 mPa·s or higher. The cosmetic of this embodiment also has a viscosity at 25 °C of preferably 5000 mPa·s or lower and more preferably 3000 mPa·s or lower. The viscosity of the cosmetic at 25°C may be 100 to 5000 mPa·s, 100 to 3000 mPa·s, 300 to 5000 mPa·s or 300 to 3000 mPa·s. The viscosity is measured using a rotational viscometer (for example, a Rheolab^® QC by Anton Paar GmbH), inserting an ST22-4V-40 spindle into the cosmetic being housed in a container with an inner diameter of 4.5 cm and kept at 25°C, with measurement for 3 minutes at a rotational speed of 100 rpm.

[0060] The cosmetic composition of this embodiment can be produced by the following procedure, for example. Specifically, first component (A), component (B), component (C), component (D), component (E1), component (E2) and component (G) are combined to obtain a mixture. Separately, component (F1), component (F2) and component (F3) are combined to obtain a mixture. Finally, both mixtures are combined to obtain a cosmetic composition.

[0061] The cosmetic may be used as an emulsified foundation, makeup base, sun protection cosmetic or emulsified concealer, and when used as an emulsified foundation, makeup base or sun protection cosmetic, it may be housed in ajar container, tube container or bottle container, or when used as an emulsified concealer, it may be housed in a brush pen type container, tube container or jar container. However, the invention is not limited to these container forms. For example, the cosmetic may be impregnated into a body and housed in an airtight compact container.

[Example]

[0062] The present invention will now be explained by the following examples, with the understanding that the invention is not limited by the examples.

[0063] (Examples 1 to 16 and Comparative Examples 1 to 8)

Water-in-oil emulsified cosmetic compositions were prepared with the compositions listed in Tables 1 to 4, by the following steps 1 to 3. Step 1 : (A) a pigment (hydrophobized pigment or non-hydrophobized pigment), (B) a silicon film-forming polymer, (C) a silicone-based surfactant, (D) an organically modified clay mineral, (E1) a non-volatile oil, (E2) a volatile oil and (G) a spherical powder were mixed at room temperature using a homogenizer.

Step 2: (F) an aqueous medium was mixed with this at room temperature using a homogenizer.

Step 3: The mixture obtained in step 2 was added to the mixture obtained in step 1, and the resulting mixture was emulsified using a homogenizer.

[0064] Evaluation was carried out as described below, and the results are shown in Tables 5 to 8.

[Table 1]

[0065] [Table 2]

[0066] [Table 4]

[0067] [Evaluation of initial shade lasting effect, non-transfer property to masks, long-lasting makeup effect, coverage effect and thin film finish]

The water-in-oil emulsified cosmetic compositions of the Examples and Comparative Examples were applied onto the skin of 10 cosmetic experts of an evaluation panel (ages 25 to 55), and the high coverage effect for blemishes and pores, and film thinness were evaluated on the following scale. For the makeup long-lasting property, the condition 4 hours and 8 hours after application was evaluated on the scale shown below. The long-lasting property of the initial shade was determined by applying a sufficient amount of the cosmetic composition onto a 3 cm-square area of the inner forearm, coating the cosmetic composition at an adjacent site in the same area 2 hours and 4 hours after application, and visually distinguished the color difference was evaluated on the scale shown below. The non-transfer property onto masks was evaluated based on the state at 4 hours and 8 hours after wearing a surgical mask with the composition applied, on the following scale. The term ''blemish'¹ refers to a portion of the skin that appears darker than the surrounding area due to deposition of pigments such as melanin present on the surface or inside the skin. For this test it is assumed that the cosmetic composition is applied onto the skin in the morning and the condition is evaluated in the evening. [0068] [Evaluation scale for long-lasting initial shade]

A: Very excellent (e.g.: No change from color at initial application, even after 4 hours) B: Excellent (e.g.: No change from color at initial application after 2 hours, but 1 or 2 individuals noted change in color after 4 hours)

C: Good (e.g.: No change from color at initial application after 2 hours, but 3 to 5 individuals noted change in color after 4 hours)

D: Fair (e.g.: 1 or 2 individuals noted change in color after 2 hours)

E: Poor (e.g.: 3 to 5 individuals noted change in color after 2 hours)

F: Very poor (e.g.: 6 to 10 individuals noted change in color after 2 hours)

[0069] [Evaluation scale for non-transfer property onto masks]

A: Very excellent (e.g.: virtually no transfer of cosmetic composition to mask even after 8 hours)

B: Excellent (e.g.: Virtually no transfer of cosmetic composition to mask after 4 hours, but transfer of cosmetic composition to mask observed by 1 or 2 individuals after 8 hours)

C: Good (e.g.: Virtually no transfer of cosmetic composition to mask after 4 hours, but transfer of cosmetic composition to mask observed by 3 to 5 individuals after 8 hours)

D: Fair (e.g.: transfer of cosmetic composition to mask observed by 1 or 2 individuals after 4 hours)

E: Poor (e.g.: transfer of cosmetic composition to mask observed by 3 to 5 individuals after 4 hours)

F: Very poor (e.g.: transfer of cosmetic composition to mask observed by 6 to 10 individuals after 4 hours)

[0070] [Evaluation scale for long-lasting makeup effect]

A: Very excellent (e.g.: no breakup of the cosmetic even after 8 hours) B: Excellent (e.g.: no breakup of the cosmetic after 4 hours, but breakup of the cosmetic experienced by 1 or 2 individuals after 8 hours)

C: Good (e.g.: no breakup of the cosmetic after 4 hours, but breakup of the cosmetic experienced by 3 to 5 individuals after 8 hours)

D: Fair (e.g.: breakup of the cosmetic experienced by 1 or 2 individuals after 4 hours)

E: Poor (e.g.: breakup of the cosmetic experienced by 3 to 5 individuals after 4 hours)

F: Very poor (e.g.: breakup of the cosmetic experienced by 6 to 10 individuals after 4 hours)

[0071] [Evaluation scale for coverage effect]

A: Very excellent (e.g.: blemishes and pores completely concealed.)

B: Excellent (e.g.: blemishes not visible, but pores visible to 1 or 2 individuals)

C: Good (e.g.: blemishes not visible, but pores visible to 3 to 5 individuals)

D: Fair (e.g.: blemishes and pores visible to 1 or 2 individuals)

E: Poor (e.g.: blemishes and pores visible to 3 to 5 individuals)

F: Very poor (e.g.: blemishes and pores visible to 6 to 10 individuals) [0072] [Evaluation scale for thin film finish]

A: Very excellent (e.g.: A thin cosmetic film is formed and there is no discomfort at all.)

B: Excellent (e.g.: One or two evaluation panels feel the thickness of the cosmetic film, but there is no discomfort.) C: Good (e.g.: One or two evaluation panels feel uncomfortable due to the thickness of the cosmetic film.)

D: Fair (e.g.: Three to five evaluation panels are uncomfortable due to the thickness of the cosmetic film.)

E: Poor (e.g.: Six to eight evaluation panels are uncomfortable due to the thickness of the cosmetic film.)

F: Very poor (e.g.: Nine or ten evaluation panels are uncomfortable due to the thickness of the cosmetic film.)

[0073] [Evaluation of stability]

Each of the prepared water-in-oil emulsified cosmetic compositions of the Examples and Comparative Examples was filled into a transparent container and sealed with a cap, and then stored for 1 month at 50°C. As a control, each water-in-oil emulsified cosmetic composition was also used after storage for 1 month at room temperature. The appearance of each water-in-oil emulsified cosmetic composition was visually observed, and the degree of caking and powder aggregation explained blow were observed. When any one of these was observed, it was judged as "F (not acceptable)", and when there was no difference from the control, it was judged as "A (acceptable)".

Caking: Hardened pigment settles in the container even after shaking by hand 10 times,

Powder aggregation: Uneven coloration due to non-uniform dispersion of the pigment was observed even after shaking by hand 10 times. [0074] [Table 5]

[0075] [Table 6]

[0076] [Table 7]

[0077] [Table 8]

Claims

1. A water-in-oil emulsified cosmetic composition comprising

(A) a hydrophobically- treated pigment comprising (A1) an inorganic pigment treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms,

(B) a silicon film-forming polymer,

(C) a silicone-based surfactant,

(D) an organically modified clay mineral,

(E) an oil optionally comprising (E1) a non-volatile oil, and

(F) an aqueous medium

2. The water-in-oil emulsified cosmetic composition according to claim

1, wherein component (A1) comprises titanium dioxide and iron oxide both of which are treated with dextrin esterified with a branched fatty acid having 16 to 22 carbon atoms.

3. The water-in-oil emulsified cosmetic composition according to claim 1 or 2, wherein component (B) is selected from the group consisting of silicone resins, such as MQ resin, MQ-T resin and a mixture thereof, and silicone (meth)acrylates, such as (acrylate/polydimethylsiloxane) copolymer and (acrylate/polytrimethylsiloxy methacrylate) copolymer.

4. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 3, wherein component (C) is a poly dimethylsiloxane in which the methyl group has been partially replaced with a hydrophilic group and optionally with a non-hydrophilic group, and wherein the hydrophilic group comprises a polyether-containing group and the non-hydrophilic group comprises at least one selected from among polydimethylsiloxane-containing groups and C₁₂-C₂₂ alkyl groups.

5. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 4, wherein the content of component (C) is more than 1 mass% based on the total mass of the water-in-oil emulsified cosmetic composition.

6. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 5, wherein the content of component (A1) is more than 3 mass% based on the total mass of the water-in-oil emulsified cosmetic composition.

7. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 6, wherein the content of component (E1) is less than 10 mass% based on the total mass of the water-in-oil emulsified cosmetic composition.

8. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 7, wherein the ratio of the mass of component (B) to the total mass of component (C) and component (E1) is 0.1 to 9.0.

9. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 8, wherein component (B) is selected from the group’ consisting of MQ resins, MQ-T resins and a mixture thereof, and component (C) is selected from the group consisting of PEG/PPG- 18/18 dimethicone and PEG/PPG- 19/19 dimethicone, the contents of component (A1), component (C) and component (E1) being respectively more than 3 mass%, more than 1 mass% and less than 4 mass%, based on the total mass of the water-in-oil emulsified cosmetic composition, and the ratio of the mass of component (B) to the total mass of component (C) and component (E1) being 0.4 to 9.0.

10. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 8, wherein component (B) is selected from the group consisting of MQ resin, (acrylate/dimethicone) copolymer and (acrylate/polytrimethylsiloxy methacrylate) copolymer, and component (C) is selected from the group consisting of PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG/PPG-10/1 dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, the contents of component (A1), component (C) and component (E1) are respectively more than 3 mass%, more than 2 mass% and less than 10 mass%, based on the total mass of the water-in-oil emulsified cosmetic composition, and the ratio of the mass of component (B) to the total mass of component (C) and component (E1) is 0.1 to 2.0.

11. The water-in-oil emulsified cosmetic composition according to any one of claims 1 to 10, further comprising (G) a spherical powder composed of at least one powder the component of which is selected from the group consisting of silica, cellulose and starch.

12. The water-in-oil emulsified cosmetic composition according to claim 1, wherein component (B) is selected from the group consisting of MQ resin, MQ-T resin and a mixture thereof, component (C) is selected from the group consisting of PEG/PPG-18/18 dimethicone and PEG/PPG-19/19 dimethicone, component (E) comprises (E1) a non- volatile oil and (E2) a volatile oil and component (F) comprises water and a polyol having 2 to 8 carbon atoms.

13. The water-in-oil emulsified cosmetic composition according to claim 1, wherein component (B) is selected from the group consisting of MQ resin, (acrylate/dimethicone) copolymer and (acrylate/polytrimethylsiloxy methacrylate) copolymer and component (C) is selected from the group consisting of PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG/PPG-10/1 dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, component (E) comprises (E1) a non-volatile oil and (E2) a volatile oil, component (F) comprises water and a mono-alcohol of 2 to 3 carbon atoms and (G) is a spherical powder composed of at least one powder the component of which is selected from the group consisting of silica, cellulose and starch.

14. A cosmetic process for caring for and/or making-up keratinic materials, comprising the application onto keratinic materials, in particular onto skin, of the water-in-oil emulsified cosmetic composition according to any one of claims 1 to 13.

15. The cosmetic process according to claim 14, wherein the water-in- oil emulsified cosmetic composition provides to the keratinic materials on which it is applied, a long-lasting initial shade and a non-transfer property.