Clay-based face masks for caring for keratin materials

Abstract

A facial mask for caring for keratin materials is disclosed, comprising: A) having a porosity ranging from 0.2% to 0.6% and a porosity ranging from 0.01 g / cm³. 3 Up to 0.2 g / cm 3 The invention relates to: (i) a water-insoluble substrate of a certain density; (ii) a composition in the form of an oil-in-water emulsion impregnated in the substrate, comprising: i) at least 2% by weight magnesium aluminum silicate relative to the total weight of the composition; ii) at least one clay different from magnesium aluminum silicate; iii) at least one hydrophilic thickener; iv) at least one nonionic surfactant; and v) at least one emollient; wherein the composition has a viscosity in the range of 40 UD to 80 UD. The invention also relates to a non-therapeutic method for treating keratin materials, comprising: (i) applying a mask to the keratin material; (ii) leaving the mask on the keratin material for a period of time; and (iii) removing the mask from the keratin material.

Description

Technical Field

[0001] This invention relates to cosmetic masks for topical application. In particular, it relates to clay-based masks for treating keratin materials. The invention also relates to non-therapeutic methods for treating keratin materials. Background Technology

[0002] Face masks made from substrate sheets (such as nonwoven fabric sheets) impregnated with lotion or similar substances have been used for cosmetic treatments of the skin, especially the face.

[0003] For example, WO 02 / 062132 discloses a face mask comprising: (1) a water-insoluble substrate; and (2) a liquid composition comprising: (a) a skin-changing agent selected from skin-changing pigments, reflective particulate materials, and mixtures thereof, wherein the skin-changing agent has a particle size of at least about 100 nm; (b) a water-soluble thickener providing the liquid composition a viscosity of about 1000 mPa·s to about 600,000 mPa·s; and (c) an aqueous carrier. The disclosed face mask provides the skin with the benefit of immediate skin color alteration.

[0004] Face masks are popular with many consumers because they can leave them on their face for a period of time and then remove them without needing to massage their face during application.

[0005] It is also known that active ingredients are used in cosmetics to treat or care for the skin, such as for cleansing, hydration, brightening, whitening, anti-aging, and pore tightening. Among these, skin cleansing, brightening, and hydration have always been of interest to consumers worldwide.

[0006] However, there is currently no toner that can effectively cleanse the skin while also brightening and hydrating it.

[0007] In addition, some toners used for skin care, especially for skin cleansing, brightening and / or hydration, are difficult to fill the substrate, so when consumers take the mask out of the packaging, droplets will fall from the substrate, which gives consumers a very unpleasant feeling.

[0008] Based on the above, there is a need for a face mask for skin care, in which the base material of the mask can be easily filled and impregnated by toners, etc., and the mask is effective in brightening, hydrating and cleansing. Invention Overview

[0010] Therefore, the object of the present invention is to provide a face mask for skin care, wherein a base material of the face mask can be easily filled and impregnated by a toner or similar substance, and the face mask is effective in brightening, hydrating and cleansing.

[0011] Therefore, according to a first aspect, the present invention provides a facial mask for caring for keratin materials, comprising:

[0012] A) Porosity ranging from 0.2% to 0.6% and within the range of 0.01 g / cm³ 3 Up to 0.2 g / cm 3 The density of the water-insoluble substrate;

[0013] B) A composition in the form of an oil-in-water emulsion impregnated into the substrate, comprising:

[0014] i) At least 2% by weight of magnesium aluminum silicate relative to the total weight of the composition;

[0015] ii) At least one type of clay different from magnesium aluminum silicate;

[0016] iii) At least one hydrophilic thickener;

[0017] iv) at least one nonionic surfactant; and

[0018] v) At least one emollient;

[0019] The composition has a viscosity ranging from 40 UD to 80 UD.

[0020] With respect to the face mask according to the invention, it was found that the composition was fully impregnated into the substrate, and no droplets fell from the substrate when the face mask was removed from its packaging.

[0021] Furthermore, the face mask according to the present invention is stable over time.

[0022] The facial mask according to the present invention can be used to cleanse the skin, improve the appearance of the skin, and hydrate the skin.

[0023] According to a second aspect, the present invention provides a non-therapeutic method for caring for keratin materials, comprising:

[0024] (i) Applying the mask according to the invention onto a keratin material;

[0025] (ii) Allow the mask to remain on the keratin material for a period of time; and

[0026] (iii) Remove the mask from the keratin material.

[0027] Other aspects and advantages of the invention will become more apparent from the following description and examples. Invention Details

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Where the definitions of terms in this specification conflict with the meanings commonly understood by one of ordinary skill in the art to which this invention pertains, the definitions described herein shall apply.

[0030] In the following text, and unless otherwise specified, the upper and lower limits of the numerical range are included within the range, especially in expressions “between … and …” and “… to …”.

[0031] Furthermore, the expression "at least one" as used in this specification is equivalent to the expression "one or more".

[0032] Throughout this application, the term "comprising / including" should be interpreted as encompassing all specifically mentioned features as well as optional, additional, or unspecified features. As used herein, the use of the term "comprising / including" also discloses embodiments in which no features other than those specifically mentioned (i.e., "consisting of the specifically mentioned features") are present.

[0033] Unless otherwise specified, all numerical values ​​representing quantities of ingredients, etc., used in the specification and claims should be understood to be modified by the term "about". Therefore, unless otherwise stated, the numerical values ​​and parameters described herein are approximate values ​​that can be varied as needed for the desired purpose.

[0034] Unless otherwise specified, all percentages in this invention refer to weight percentages.

[0035] In the context of this invention, the term "keratin material" refers to the entire skin of the body, excluding the scalp and mucous membranes. The term "keratin material" preferably refers to facial skin, particularly the skin of the forehead and / or sides of the nose and / or chin.

[0036] According to a first aspect, the present invention provides a facial mask for caring for keratin materials, comprising:

[0037] A) Porosity ranging from 0.2% to 0.6% and within the range of 0.01 g / cm³ 3 Up to 0.2 g / cm 3 The density of the water-insoluble substrate;

[0038] B) A composition in the form of an oil-in-water emulsion impregnated into the substrate, comprising:

[0039] i) At least 2% by weight of magnesium aluminum silicate relative to the total weight of the composition;

[0040] ii) At least one type of clay different from magnesium aluminum silicate;

[0041] iii) At least one hydrophilic thickener;

[0042] iv) at least one nonionic surfactant; and

[0043] v) At least one emollient;

[0044] The composition has a viscosity ranging from 40 UD to 80 UD.

[0045] water-insoluble substrate

[0046] According to a first aspect, the facial mask according to the invention comprises a porosity ranging from 0.2% to 0.6% and a porosity ranging from 0.01 g / cm³. 3 Up to 0.2 g / cm 3 A water-insoluble substrate with a certain density.

[0047] For the purposes of this invention, the term "water insoluble" means that the substrate is insoluble in water and will not disintegrate when immersed in water.

[0048] Porosity is defined as the ratio between the volume occupied by pores and the total volume of the substrate.

[0049] Preferably, the substrate has pores with a diameter ranging from 0.05 mm to 0.3 mm.

[0050] Preferably, the substrate can be a woven or nonwoven fabric made of natural fibers (e.g., cotton, pulp, bamboo, and cellulose fibers), semi-natural fibers (e.g., viscose rayon fibers), and synthetic fibers (e.g., polyester fibers, polyethylene terephthalate fibers, polyethylene fibers, and polypropylene fibers). Two or more fibers selected from the above can be used in combination.

[0051] The substrate may consist of one or more layers. If a multilayer substrate is used, the material of each layer may be the same or different from each other. The multilayer substrate can be prepared by laminating multiple layers made of the aforementioned materials.

[0052] The substrate can come in a variety of shapes, depending on the intended use and characteristics of the mask.

[0053] The substrate is typically designed to conform to the skin area where local application is required. For example, when applying a face mask to the face, the substrate is designed to conform to the facial shape, avoiding the eye, nostril, and mouth areas as needed. Non-limiting examples of substrates that can be used in this invention are described, for example, in patent applications WO 02 / 062132 or EP 2489286A.

[0054] Advantageously, the water-insoluble substrate has a porosity ranging from 0.2% to 0.5%, preferably from 0.25% to 0.45%, and a density ranging from 0.01 g / cm³. 3Up to 0.15 g / cm 3 0.02g / cm 3 Up to 0.1 g / cm 3 The density.

[0055] Advantageously, the substrate has a thickness ranging from 0.2 mm to 2 mm.

[0056] Composition

[0057] According to a first aspect, the mask according to the invention comprises a composition in the form of an oil-in-water emulsion impregnated in a substrate, having a viscosity in the range of 40 UD to 80 UD.

[0058] The viscosity of this composition can be measured at 25°C using a Rheomat 100Plus viscometer equipped with a rotor M2 rotating at 200 rpm.

[0059] The composition comprises:

[0060] i) At least 2% by weight of magnesium aluminum silicate relative to the total weight of the composition;

[0061] ii) At least one type of clay different from magnesium aluminum silicate;

[0062] iii) At least one hydrophilic thickener;

[0063] iv) at least one nonionic surfactant; and

[0064] v) At least one emollient.

[0065] Aqueous phase

[0066] As an oil-in-water emulsion, the composition comprises an aqueous phase. The aqueous phase comprises water.

[0067] Preferably, the continuous aqueous phase contains an organic solvent miscible with water (at room temperature 25°C), such as glycerol.

[0068] The aqueous phase may also contain any water-soluble or water-dispersible additives commonly used in the art.

[0069] Advantageously, water is present in the composition in an amount ranging from 60% to 90% by weight, preferably from 70% to 80% by weight, relative to the total weight of the composition of the invention.

[0070] Advantageously, the aqueous phase is present in an amount ranging from 60% to 90% by weight, and preferably from 70% to 80% by weight, of the total weight of the composition.

[0071] oil phase

[0072] As an oil-in-water emulsion, the composition comprises an oil phase. The oil phase comprises at least one oil.

[0073] The term "oil" refers to any fatty body that is liquid at room temperature (20-25°C) and atmospheric pressure. These oils can be of animal, plant, mineral, or synthetic origin.

[0074] The oil can be volatile or non-volatile.

[0075] The term "volatile oil" refers to any non-aqueous medium capable of evaporating from the skin or lips in less than one hour at room temperature (20-25°C) and atmospheric pressure (760 mmHg). This volatile oil is a volatile cosmetic oil, which is liquid at room temperature. More specifically, the volatile oil has a concentration between 0.01 mg / cm³. 2 / min and 200mg / cm 2 Evaporation rate between / min (including upper and lower limits).

[0076] The term "non-volatile oil" is intended to refer to oils that remain on the skin or lips at ambient temperature and atmospheric pressure. More specifically, non-volatile oils have a concentration strictly below 0.01 mg / cm³. 2 Evaporation rate of / min.

[0077] To measure this evaporation rate, 15g of the oil or oil mixture to be tested was introduced into a crystallizing dish with a diameter of 7cm, which was placed in a 0.3m container at a temperature controlled at 25°C and a relative humidity controlled at 50%. 3 On a balance in a large chamber. The liquid was allowed to evaporate freely without stirring, ventilated by a fan (PAPST-MOTOREN, 8550N, rotating at 2700 rpm), vertically positioned above the crystallizer containing the solvent, blades pointing towards the crystallizer and 20 cm from the bottom. The mass of oil remaining in the crystallizer was measured periodically. The evaporation rate was expressed as per unit area (cm²). 2 It is expressed as the number of milligrams of oil evaporated per unit time (minute).

[0078] The oil suitable for use in this invention may be hydrocarbon-based, silicone-based, or fluorine-based.

[0079] According to the present invention, the term "silicone oil" refers to an oil comprising at least one silicon atom, and in particular at least one Si-O group.

[0080] The term "fluorinated oil" refers to an oil that contains at least one fluorine atom.

[0081] The term "hydrocarbon oil" refers to oil that primarily contains hydrogen and carbon atoms.

[0082] The oil may optionally include oxygen, nitrogen, sulfur and / or phosphorus atoms, for example in the form of hydroxyl or acid groups.

[0083] Advantageously, the oil is present in the composition in an amount ranging from 0.2% to 10% by weight, preferably from 0.5% to 2.5% by weight, relative to the total weight of the composition of the invention.

[0084] The oil phase may also contain any oil-soluble or oil-dispersible additives commonly used in the art.

[0085] Advantageously, the oil phase is present in an amount of 0.2% to 10% by weight, preferably 0.5% to 2.5% by weight, relative to the total weight of the composition.

[0086] Magnesium aluminum silicate

[0087] According to the first aspect, the composition contains at least 2% by weight magnesium aluminum silicate relative to the total weight of the composition.

[0088] Magnesium aluminum silicate is a naturally occurring mineral derived from silicate ores of the montmorillonite group. Its classification number is 1327-43-1, and its molecular formula is MgAl[Al(SiO4)2].

[0089] As for commercial products of magnesium aluminum silicate, products from VANDERBILT can be mentioned.

[0090] Advantageously, magnesium aluminum silicate is present in an amount ranging from 2% to 4% by weight, preferably from 2% to 2.5% by weight, relative to the total weight of the composition.

[0091] clay

[0092] According to the first aspect, the composition contains at least one type of clay different from magnesium aluminum silicate.

[0093] Clay is a product that is already well known, as described, for example, in the publication Minéralogie des argiles [Clay Mineralogy], S. Caillère, S. Hénin and M. Rautureau, 2nd edition, 1982, Masson, whose teachings are incorporated herein by reference.

[0094] Among clays, examples may be mentioned of clays of the montmorillonite group, such as synthetic lithium saponite and montmorillonite; clays of the kaolinite group, such as kaolinite, dickite, or pearl clay; and optionally modified clays of the halloysite, diaspore, serpentine, magnetite or pyrophyllite, montmorillonite, bedeite, vermiculite, talc, magnesia, hydropyrite, bentonite, saponite, chlorite, sepiolite, and illite groups.

[0095] The clay present in the compositions of this invention may be natural or synthetic. Natural clay is sedimentary rock, mostly composed of specific minerals—typically aluminum silicates. Kaolin is thus a natural clay.

[0096] Clay can also be chemically modified using various compounds, such as acrylic acid, polysaccharides (e.g., carboxymethyl cellulose), or organic cations.

[0097] In the context of this invention, it is preferred to use clays that are compatible with keratin materials (especially skin) cosmetics and are acceptable to keratin materials (especially skin).

[0098] Preferably, the clay used is selected from kaolinite, montmorillonite, saponite, synthetic lithium saponite, bentonite, and talc. More particularly, mixtures of clays, as well as natural clay, will be used.

[0099] As for natural clay, raw clay, especially illite-rich raw clay, can be mentioned; clay rich in montmorillonite is called bleached clay, or bentonite, for example, or white clay rich in kaolinite. As for bentonite, those sold by Elementis under the names "Bentone 38 VCG", "Bentone Gel CAO V", "Bentone 27V" and "Bentone Gel MIO V" can be mentioned in particular.

[0100] Montmorillonite and montmorillonite are hydrated aluminum silicate and / or magnesium silicate. As examples, montmorillonite sold by Rockwood Additives under the name Gel White H and purified montmorillonite sold by Vanderbilt under the name Veegum Granules may be mentioned. Montmorillonite sold by Kunimine under the name Kunipia G4 and sepiolite sold by Tolsa under the name Pangel S9 may also be mentioned.

[0101] Examples of kaolinite include kaolin sold by BASF Personal Care Ingredients under the name Coslin C100 or by Imerys under the name Kaolin Supreme.

[0102] Talc is a hydrated magnesium silicate that typically contains aluminum silicate. The crystal structure of talc consists of repeating layers of a sandwich structure with brucite interspersed between layers of silica. Examples include 5-micron micron-sized micron-sized micron-sized magnesium silicate sold by Nippon Talc under the name MicroAce P3, or talc sold by Nippon Talc under the names Rose Talc and TalcSG-2000, by US Cosmetics (Miyoshi) under the name J 68 BC, by Luzenac under the names Luzenac 00 and Luzenac Pharma M, and by Asada Milling under the name Talc JA-46R.

[0103] As a soapstone belonging to the montmorillonite group, synthetic soapstones can be mentioned, especially those named after Kunimine. The kind that's for sale.

[0104] As a synthetic lithium soapstone, it can be mentioned that it was sold by Rockwood. XLG.

[0105] More preferably, the clay that is different from magnesium aluminum silicate is kaolinite.

[0106] Advantageously, the clay, which is different from magnesium aluminum silicate, is present in an amount ranging from 2% to 15% by weight, preferably from 4% to 8% by weight, relative to the total weight of the composition.

[0107] hydrophilic thickener

[0108] According to a first aspect, the composition according to the invention comprises at least one hydrophilic thickener.

[0109] The term "hydrophilic thickener" is intended to refer to a compound that can increase the viscosity of the aqueous phase of a composition.

[0110] As hydrophilic thickeners, water-soluble or water-dispersible thickening polymers are particularly noteworthy. They are especially selected from:

[0111] - Polyvinylpyrrolidone,

[0112] - Homopolymers or copolymers of acrylic acid or methacrylic acid or their salts and esters, and particularly those produced by Allied Colloid under the name Versicol or Versicol Or Salcare SC95, manufactured by Ciba-Geigy under the name Ultrahold. Products for sale; polyacrylates and polymethacrylates, such as those sold by Guardian under the names Lubrajel and Norgel or by Hispano Chimica under the name Hispagel; polyacrylates of the Synthalen K type;

[0113] - Polyacrylamide;

[0114] -By Hercules company under the name The copolymer of acrylic acid and acrylamide, sold in its sodium salt form by Vanderbilt under the name Darvan N. Sodium polymethacrylate sold by Henkel under the name Hydagen Sodium salts of polyhydroxycarboxylic acids for sale;

[0115] -2-Acrylamido-2-methylpropanesulfonic acid polymers and copolymers, which are optionally crosslinked and / or neutralized, such as poly(2-acrylamido-2-methylpropanesulfonic acid) (CTFA name: ammonium polyacrylamide dimethyl taurate) sold by Clariant under the name Hostacerin AMPS;

[0116] - Crosslinked anionic acrylamide / AMPS copolymer, which is in W / O emulsion form, for example, by SEPPIC under the name Sepigel 305 (CTFA name: polyacrylamide / AMPS). 13-14 Isoparaffin / lauryl alcohol polyether-7) and those sold under the name Simulgel 600 (CTFA name: acrylamide / sodium acryloyl dimethyl taurate copolymer / isohexadecane / polysorbate 80);

[0117] -Pemulen type polyacrylate / alkyl acrylate copolymer;

[0118] - Polysaccharide biopolymers, such as xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, stearin, chitin derivatives and chitosan derivatives, carrageenan, gellan gum, alginate, or cellulose such as microcrystalline cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose. For example, references may be made to CP Kelco under the trade name... Xanthan gum sold by CG-T;

[0119] - Hydrophilic fumed silica is obtained by high-temperature hydrolysis of volatile silicon compounds in an oxyhydrogen flame to produce finely fragmented silica. This hydrophilic silica has a large number of silanol groups on its surface. Such hydrophilic silica is, for example, produced by Degussa under the name Aerosil. Aerosil Aerosil Aerosil and Aerosil Or by Cabot Corporation under the name Cab-O-Sil HS- Cab-O-Sil EH- Cab-O-Sil LM- Cab-O-Sil MS- and Cab-O-Sil M- For sale. They preferably have a particle size ranging from nanometer to micrometer, for example, in the range of about 5 to 200 nm;

[0120] -Associated polymers, such as the PEG-150 / stearyl alcohol / SMDI copolymer sold by Rohm & Haas under the name Aculyn 46, or the stearyl alcohol polyether-100 / PEG-136 / HDI copolymer sold by Elementis under the name Rheolate FX 1100; and mixtures thereof.

[0121] Preferably, the hydrophilic thickener is selected from polysaccharide biopolymers, more preferably xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, dextran, carrageenan, gellan gum, alginate, cellulose (e.g., microcrystalline cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose), and mixtures thereof.

[0122] Advantageously, the hydrophilic thickener is present in an amount ranging from 0.1% to 0.7% by weight, preferably from 0.15% to 0.45% by weight, and more preferably from 0.2% to 0.35% by weight, relative to the total weight of the composition.

[0123] Nonionic surfactants

[0124] According to a first aspect, the composition according to the invention comprises at least one nonionic surfactant.

[0125] Preferably, the surfactant is selected from:

[0126] - Polyols and esters of fatty acids having saturated or unsaturated chains containing, for example, 8 to 24 carbon atoms, and more preferably 12 to 22 carbon atoms, and their oxidized olefinic derivatives, i.e. derivatives containing oxyethylene and / or oxypropylene units, such as C8-C 24 Glycerides of fatty acids and their oxidized olefinic derivatives;

[0127] - Polyethylene glycol esters containing, for example, 8 to 24 carbon atoms, and more preferably 12 to 22 carbon atoms, and their oxidized olefinic derivatives;

[0128] -C8-C 24 Sorbitol esters of fatty acids and their oxidized olefinic derivatives;

[0129] - Fatty alcohol ethers;

[0130] -C8-C 24 Glycoesters of fatty acids, C8-C 24 Sugar ethers of fatty alcohols and mixtures thereof.

[0131] As a fatty acid chain containing 8 to 24 carbon atoms, and more preferably 12 to 22 carbon atoms, glycerol stearate (glycerol monostearate, distearate and / or tristearate) (CTFA name: glycerol stearate) or glycerol ricinoleate, and mixtures thereof may be particularly mentioned.

[0132] In particular, the polyethylene glycol esters of fatty acids include polyethylene glycol stearates (polyethylene glycol monostearate, distearate and / or tristearate), and more particularly polyethylene glycol 40OE monostearate (CTFA name: PEG-40 stearate), polyethylene glycol 50OE monostearate (CTFA name: PEG-50 stearate) and polyethylene glycol 100OE monostearate (CTFA name: PEG-100 stearate) and mixtures thereof.

[0133] Preferably, the nonionic surfactant is selected from C 12 -C 22 Fatty acid glycerides, C 12 -C 22 Polyethylene glycol esters of fatty acids, and mixtures thereof.

[0134] Mixtures of these surfactants can also be used, for example, by Uniqema under the name Arlacel. Products sold containing glyceryl stearate and PEG-100 stearate, and manufactured by Goldschmidt under the name... Products sold containing glyceryl stearate (glyceryl mono-distearate) and potassium stearate (CTFA name: glyceryl stearate SE).

[0135] Advantageously, the nonionic surfactant is present in an amount ranging from 0.2% to 2% by weight, preferably from 0.3% to 1% by weight, and more preferably from 0.4% to 0.8% by weight, relative to the total weight of the composition.

[0136] Moisturizer

[0137] According to a first aspect, the composition of the present invention comprises at least one emollient.

[0138] Emollients hydrate keratin materials. Emollients are known to those skilled in the art. See, for example, the International Cosmetic Ingredient Dictionary and Handbook, Volume 4 (9th edition, 2002), and more particularly the emollients disclosed on pages 2930-2936. The disclosure of the International Cosmetic Ingredient Dictionary and Handbook, Volume 4, pages 2930-2936, is incorporated herein by reference.

[0139] Non-limitingly, emollients that can be used in the compositions of the present invention include diols having 2 to 20 carbon atoms, preferably 2 to 10 carbon atoms and more preferably 2 to 6 carbon atoms, such as propylene glycol, butylene glycol, pentanediol, hexanediol, caprylyl glycol, dipropylene glycol, diethylene glycol; caprylic / capric triglycerides, and mixtures thereof.

[0140] Advantageously, the emollient is present in an amount ranging from 0.5% to 10% by weight, preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

[0141] Co-surfactants

[0142] Preferably, the composition according to the invention comprises a component selected from saturated C 12 -C 24 fatty alcohols and C 12 -C 22 Fatty acid co-surfactants.

[0143] For the purposes of this invention, the saturated C 12 -C 24 The fatty alcohol is linear. Preferably, the fatty alcohol contains 14 to 22 carbon atoms.

[0144] The fatty alcohols suitable for use in this invention are preferably selected from cetyl alcohol, stearyl alcohol, cetearyl alcohol, myristyl alcohol, lauryl alcohol, tridecyl alcohol, pentadecyl alcohol, hexadecyl alcohol, arachidyl alcohol, benzyl alcohol, and mixtures thereof; they are preferably selected from cetyl alcohol, stearyl alcohol and cetearyl alcohol.

[0145] As cetyl alcohol is most particularly suitable for the present invention, products sold, for example, under the following names, can be used: 16 / 98F and 16 / 98P, sold by Ecogreen Oleochemicals; 16. Sold by Evonik Goldschmidt; 16. Sold by Cognis; Sold by VVF in 1698; 1698P, sold by Oxiteno; Cetyl Alcohol 98% Min, sold by EmeryOleochemicals; 16 (98%), sold by Godrej Industries; 16-98, sold by Sasol; 6098, sold by Kao Company and 16. Sold by Aegis Chemical Company.

[0146] As the stearyl alcohol most particularly suitable for the present invention, those sold under, for example, the following names may be used: 18. Sold by Evonik Goldschmidt; 18 / 98F and 18 / 98P, sold by Ecogreen Oleochemicals; 18. Sold by Cognis. 8098, sold by Kao Corporation; 18. Sold by Aegis Chemical Company; 18-98, sold by Sasol and 45, sold by Nihon Yushi Co., Ltd.

[0147] Cetearyl alcohol, which is most particularly suitable for use in this invention, can be used, for example, those sold under the following names: 68 / 50F and 68 / 50P, sold by Ecogreen Oleochemicals; O OR and O OR Flakes, sold by Cognis; 1618C50P, sold by Oxiteno. 16-18EN, sold by Sasol; Alcohol Cetoestearilico 50 / 50, sold by Industria Quimica Del Centro; 30CK, sold by New Japan Chemical Co., Ltd.; Cetylstearyl Alcohol 50:50, sold by Evonik Goldschmidt Co., Ltd. 6850, sold by Kao Company; 1618 (50:50), sold by VVF Company and 161850:50OR, sold by Godrej Industries.

[0148] As C 12 -C 22 Examples of fatty acids include stearic acid, myristic acid, oleic acid, linoleic acid, linolenic acid, lauric acid, palmitic acid, and mixtures thereof.

[0149] C applicable to the present invention 12 -C 22 The fatty acids are preferably selected from palmitic acid, stearic acid, myristic acid, lauric acid, and mixtures thereof.

[0150] If present, the co-surfactant is preferably selected from cetyl alcohol, stearyl alcohol, cetearyl alcohol, palmitic acid, stearic acid, myristic acid, lauric acid, and mixtures thereof.

[0151] If present, the co-surfactant is advantageously present in an amount ranging from 0.3% to 1.5% by weight, preferably from 0.5% to 1% by weight, relative to the total weight of the composition.

[0152] Additional cosmetic active ingredients

[0153] In some embodiments, the composition according to the invention comprises at least one cosmetic active ingredient for caring for keratin materials.

[0154] The active ingredient in this cosmetic product can be dissolved in either the aqueous or oil phase, depending on its properties.

[0155] Examples of cosmetic active ingredients that may be included in the compositions according to the invention include soothing agents (e.g., dipotassium glycyrrhizate) and brightening agents (e.g., titanium dioxide).

[0156] Preferably, the composition according to the invention comprises titanium dioxide.

[0157] Those skilled in the art can adjust the amount of cosmetic active ingredients according to the intended purpose.

[0158] Additional excipients or additives

[0159] The composition may also contain conventional cosmetic adjuvants or additives (depending on their nature) in the aqueous or oil phase, such as fragrances, chelating agents (e.g., tetrasodium glutamate diacetate and disodium EDTA), preservatives (e.g., hydroxyacetophenone, pentylene glycol and phenoxyethanol) and bactericides, pH adjusters (e.g., triethanolamine, citric acid and sodium hydroxide), fillers (e.g., corn (zea mays) starch) and mixtures thereof.

[0160] Those skilled in the art can select the amount of additional excipients or additives so as not to adversely affect the final use of the composition according to the invention.

[0161] Preferably, the weight ratio of the water-insoluble substrate to the composition ranges from 1:3 to 1:20. More preferably, the weight ratio of the water-insoluble substrate to the composition ranges from 1:8 to 1:15.

[0162] According to a particularly preferred embodiment, the present invention provides a facial mask for caring for keratin materials, comprising:

[0163] A) Has a porosity ranging from 0.25% to 0.45% and a density ranging from 0.02 g / cm³. 3 Up to 0.1 g / cm 3 The density of the water-insoluble substrate;

[0164] B) A composition in the form of an oil-in-water emulsion impregnated into the substrate, comprising, relative to the total weight of the composition:

[0165] i) 2.0% to 2.5% by weight magnesium aluminum silicate;

[0166] ii) 4% to 8% kaolinite;

[0167] iii) 0.2% to 0.35% by weight of at least one hydrophilic thickener selected from xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, dextran, carrageenan, gellan gum, alginate, and cellulose such as microcrystalline cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose;

[0168] iv) 0.4% to 0.8% by weight of at least one ingredient selected from C 12 -C 22 Fatty acid glycerides, C 12 -C 22 Polyethylene glycol esters of fatty acids, nonionic surfactants in mixtures thereof; and

[0169] v) 0.5% to 5% by weight of at least one emollient;

[0170] vi) 0.5% to 1% by weight of at least one co-surfactant selected from cetyl alcohol, stearyl alcohol, cetearyl alcohol, palmitic acid, stearic acid, myristic acid, lauric acid, and mixtures thereof;

[0171] The composition has a viscosity in the range of 40 UD to 80 UD;

[0172] The weight ratio of the water-insoluble substrate to the composition ranges from 1:8 to 1:15.

[0173] Galen Forms and Uses

[0174] The mask according to the invention can be used as a skin mask and is intended for topical application and for skin care.

[0175] According to a second aspect, the present invention provides a non-therapeutic method for caring for keratin materials, comprising:

[0176] (i) Applying the mask according to the invention onto a keratin material;

[0177] (ii) Allow the mask to remain on the keratin material for a period of time; and

[0178] (iii) Remove the mask from the keratin material.

[0179] "Used as a skin mask" can be understood as applying the mask as defined above to at least one area of ​​the skin.

[0180] Preferably, the application time is 5 to 45 minutes, more preferably 10 to 30 minutes.

[0181] The following examples are for illustrative purposes only and are not intended to be limiting. Example

[0182] The main raw materials used to prepare the mask composition, their trade names, and their suppliers are listed in Table 1.

[0183] Table 1

[0184]

[0185] Substrate used: Made of PE / PP blend, it has a thickness of 0.7 mm, a porosity of 0.394%, a pore size of 0.105-0.128 mm, and a density of 0.029 g / cm³. 3 The product name BIOCOMP is obtained from Havix.

[0186] Comparative Examples 1-4 and Invention Examples 1-4

[0187] The compositions of Comparative Examples (CE.) 1-4 and Inventive Examples (IE.) 1-4 were prepared according to the amounts given in Table 2. The amount of each component is given as a percentage of the total weight of the composition.

[0188] Table 2

[0189]

[0190]

[0191] Preparation process:

[0192] Prepare the compositions listed above as follows:

[0193] 1) Heat a portion of the water to 70-75°C, add magnesium aluminum silicate and stir for 15-20 minutes, add glycerol, propylene glycol (and pentylene glycol, if present) and corn starch (zea mays), stir for 10-15 minutes, and add hydroxyacetophenone to obtain a mixture;

[0194] 2) Add titanium dioxide to the mixture and stir for 10-15 minutes;

[0195] 3) Add caprylic / capric triglyceride, cetyl alcohol, stearic acid, glyceryl stearate (and) PEG-100 stearate and stir for 5-10 minutes;

[0196] 4) Add xanthan gum and stir for 10-15 minutes;

[0197] 5) Add the remaining water and stir to obtain a homogenized mixture;

[0198] 6) Add kaolin and stir for 10-15 minutes;

[0199] 7) Cool to room temperature to obtain the composition.

[0200] A face mask is prepared by filling a substrate with the above composition, wherein the weight ratio of the substrate to the composition is 1:15.

[0201] Price:

[0202] The composition obtained above is evaluated as follows.

[0203] Viscosity

[0204] Viscosity was measured at 25°C using a Rheomat 100 Plus viscometer equipped with rotor M2. The measurement was performed after the rotor was rotated in the composition for 10 minutes at a shear rate of 200 rpm (after which stability of viscosity and rotor rotation speed was observed).

[0205] stability

[0206] The stability is evaluated as follows:

[0207] 1) Pour 40 mL of sample into 60 mL glass bottles, and prepare six bottles for each composition to be tested;

[0208] 2) Place one bottle in the sun (for sunlight testing), one bottle at room temperature, one bottle in a refrigerator at 4°C, one bottle in an oven at 37°C, one bottle in an oven at 45°C (for stability testing at different temperatures), and one bottle in an oven that cycles from -20°C to 20°C (for cyclic stability); and

[0209] 3) For sunlight test: observe the appearance of the sample after 24 hours; for stability test at different temperatures: observe the appearance of the sample after 2 months; or for cycle stability: observe the appearance of the sample after 10 days.

[0210] If its appearance remains unchanged after all stability tests and cyclic stability tests at different temperatures, its stability will be rated as passed; otherwise, it will be rated as failed.

[0211] The viscosity and stability of the compositions according to the comparative examples and the inventive examples are listed in Table 3.

[0212] Table 3

[0213] nature CE.1 CE.2 CE.3 CE.4 IE.1 IE.2 IE.3 IE4 Viscosity (UD) 27.5 30.1 30.1 32.7 60.2 56 44.5 64.1 stability fail fail fail fail pass pass pass pass

[0214] It can also be seen that the composition according to the invention has a viscosity suitable for local application and is stable.

[0215] Beauty effect

[0216] The following is an evaluation of the beauty effects of this face mask.

[0217] Fifty-eight volunteers (all women and mask users) were divided into two groups. Group 1 used the mask according to Invention Example 2 and Product 1 (a mask sold by Yujiahui Co., Ltd. under the name YuniFang Mud Mask), while Group 2 used the mask according to Invention Example 2 and Product 2 (a mask sold by Proya Co., Ltd. under the name Proya Bubble Mask). The immediate effects after application and the skin feel 12 hours after application were then evaluated.

[0218] The evaluation results regarding the immediate efficacy after application and the skin sensation 12 hours after use are summarized in Table 4.

[0219] Table 4

[0220]

[0221] The effects of the mask of Invention Example 2 on skin appearance, transepidermal water loss, and skin hydration were also evaluated in the following clinical trials.

[0222] Forty healthy Chinese women aged 18-35 with oily to very oily skin were invited as volunteers.

[0223] During the two weeks prior to applying the test mask, volunteers were asked to rinse according to the following protocol:

[0224] 1) In the morning, cleanse your face with a standard facial cleanser (L'OREAL's Yu Xi Hydrating Facial Cleanser), and apply a standard moisturizer (L'OREAL's La Roche Posay HYDREANE légère) and a standard sunscreen (L'OREAL's L'OREAL UV PERFECT Aqua-Essence SPF30).

[0225] 2) Cleanse your face with a standard facial cleanser at night and apply a standard moisturizer.

[0226] Subsequently, over the next 5 weeks, volunteers were invited to apply the tested face mask twice a week according to the following protocol:

[0227] 1) Cleanse your face with a standard facial cleanser in the morning, and apply a standard moisturizer and standard sunscreen;

[0228] 2) Cleanse your face with a standard facial cleanser at night and apply a standard moisturizer;

[0229] 3) Apply the composition to be tested twice a week.

[0230] Blackhead removal ability

[0231] The following is an evaluation of the mask's ability to remove blackheads.

[0232] Before applying the mask to be tested (T0) and 15 minutes and 2 hours after applying the mask to be tested once (T2). 2hr ) and 8 hours (T 8hr Photos were taken at [location]. Image analysis was then used to calculate the count and intensity of blackhead reduction.

[0233] Image analysis concluded that the mask of Invention Example 2 had a significant immediate effect on reducing the number and intensity of blackheads on the nose 15 minutes after a single application.

[0234] Improved skin appearance

[0235] The effects of the mask of Invention Example 2 on skin appearance, such as pores, smoothness, brightness, and transparency, are evaluated below.

[0236] Photographs were taken immediately before (T0) and immediately after (T1) application of the mask to be tested, and two weeks after (T2) application of the composition to be tested. 2w ), 4 weeks (T) 4w ) and 5 weeks (T) 5wTake three photos at a time (from the right, left, and front). Then evaluate changes in skin appearance through image analysis.

[0237] Transepidermal water loss (TEWL)

[0238] One hour after applying the composition to be tested (T 1h ), two weeks (T) 2w ), 4 weeks (T) 4w ) and 5 weeks (T) 5w Transdermal water loss was measured using a vapometer.

[0239] Skin hydration

[0240] One hour after applying the composition to be tested (T 1h ) and 5 weeks (T) 5w Skin hydration was measured using a corneometer.

[0241] The results are summarized in Table 5.

[0242] Table 5

[0243]

[0244] NA: Not tested; NS: No significant change.

[0245] The lack of significant changes in transepidermal water loss indicates that the tested mask is skin-friendly and does not adversely affect the skin barrier.

[0246] It can be seen that the face mask according to the present invention can bring a hydrating sensation.

[0247] The composition according to the present invention can improve skin smoothness, radiance, and skin transparency. It can also significantly improve skin pores after 4 weeks of application.

Claims

1. A facial mask for caring for keratin materials, comprising: A) Porosity ranging from 0.2% to 0.6% and a concentration ranging from 0.01 g / cm³ 3 Up to 0.2 g / cm 3 The density of the water-insoluble substrate; B) A composition in the form of an oil-in-water emulsion impregnated into the substrate, comprising: i) 2% to 2.5% magnesium aluminum silicate relative to the total weight of the composition; ii) 4% to 8% by weight of at least one clay different from magnesium aluminum silicate, relative to the total weight of the composition; iii) At least one hydrophilic thickener; iv) At least one nonionic surfactant; v) at least one emollient; and vi) at least one brightening agent; The composition has a viscosity in the range of 40 UD to 80 UD.

2. The face mask according to claim 1, wherein the water-insoluble substrate has pores with a diameter ranging from 0.05 mm to 0.3 mm.

3. The face mask according to claim 1 or 2, wherein the water-insoluble substrate is a woven or nonwoven fabric made of fibers selected from cotton, pulp, bamboo, cellulose fibers, viscose rayon fibers, polyester fibers, polyethylene terephthalate fibers, polyethylene fibers and polypropylene fibers, and mixtures thereof.

4. The face mask according to claim 1 or 2, wherein the clay, which is different from magnesium aluminum silicate, is kaolinite.

5. The face mask according to claim 1 or 2, wherein the hydrophilic thickener is selected from polysaccharide biopolymers.

6. The face mask according to claim 1 or 2, wherein the hydrophilic thickener is selected from xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, dextran, carrageenan, gellan gum, alginate, cellulose, and mixtures thereof.

7. The face mask according to claim 1 or 2, wherein the hydrophilic thickener is present in an amount ranging from 0.1% to 0.7% by weight relative to the total weight of the composition.

8. The face mask according to claim 1 or 2, wherein the hydrophilic thickener is present in an amount ranging from 0.15% to 0.45% by weight relative to the total weight of the composition.

9. The face mask according to claim 1 or 2, wherein the hydrophilic thickener is present in an amount ranging from 0.2% to 0.35% by weight relative to the total weight of the composition.

10. The face mask according to claim 1 or 2, wherein the nonionic surfactant is selected from C 12 -C 22 Fatty acid glycerides, C 12 -C 22 Polyethylene glycol esters of fatty acids, and mixtures thereof.

11. The face mask according to claim 1 or 2, wherein the nonionic surfactant is present in an amount ranging from 0.2% to 2% by weight relative to the total weight of the composition.

12. The face mask according to claim 1 or 2, wherein the nonionic surfactant is present in an amount ranging from 0.3% to 1% by weight relative to the total weight of the composition.

13. The face mask according to claim 1 or 2, wherein the nonionic surfactant is present in an amount ranging from 0.4% to 0.8% by weight relative to the total weight of the composition.

14. The face mask according to claim 1 or 2, wherein the brightening agent is titanium dioxide, which is present in an amount of 2.0% by weight relative to the total weight of the composition.

15. The face mask according to claim 1 or 2, wherein the composition comprises a component selected from saturated C 12 -C 24 fatty alcohols and C 12 -C 22 Fatty acid co-surfactants.

16. The face mask according to claim 15, wherein the co-surfactant is present in an amount ranging from 0.3% to 1.5% by weight relative to the total weight of the composition.

17. The face mask according to claim 15, wherein the co-surfactant is present in an amount ranging from 0.5% to 1% by weight relative to the total weight of the composition.

18. The face mask according to claim 1 or 2, wherein the weight ratio of the water-insoluble substrate to the composition ranges from 1:3 to 1:

20.

19. The face mask according to claim 1 or 2, wherein the weight ratio of the water-insoluble substrate to the composition ranges from 1:8 to 1:

15.

20. The facial mask according to claim 1, comprising: A) Porosity ranging from 0.25% to 0.45% and a concentration ranging from 0.02 g / cm³ 3 Up to 0.1 g / cm 3 The density of the water-insoluble substrate; B) A composition in the form of an oil-in-water emulsion impregnated into the substrate, comprising, relative to the total weight of the composition: i) 2% to 2.5% by weight magnesium aluminum silicate; ii) 4% to 8% kaolinite; iii) 0.2% to 0.35% by weight of at least one hydrophilic thickener selected from xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, dextran, carrageenan, gellan gum, alginate and cellulose; iv) 0.4% to 0.8% by weight of at least one ingredient selected from C 12 -C 22 Fatty acid glycerides, C 12 -C 22 Polyethylene glycol esters of fatty acids, nonionic surfactants in mixtures thereof; and v) 0.5% to 5% by weight of at least one emollient; vi) 2.0 wt% titanium dioxide; and vii) 0.5% to 1% by weight of at least one co-surfactant selected from cetyl alcohol, stearyl alcohol, cetearyl alcohol, palmitic acid, stearic acid, myristic acid, lauric acid, and mixtures thereof; The composition has a viscosity in the range of 40 UD to 80 UD; The weight ratio of the water-insoluble substrate to the composition ranges from 1:8 to 1:

15.

21. A non-therapeutic method for caring for keratin materials, comprising: (i) Applying a face mask according to any one of claims 1-20 onto the keratin material; (ii) Allow the mask to remain on the keratin material for a period of time; and (iii) Remove the mask from the keratin material.

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