Care composition for keratin materials and mask containing it

Abstract

Care composition for keratin materials and mask containing the same The present invention relates to a care composition for keratin materials in gel form, comprising, in a hydrophilic phase, (i) from 0.8% by weight to 1.8% by weight of at least one sodium salt, relative to the total weight of the composition; (ii) at least one hydrophilic thickener; and (iii) at least one polyol; wherein the composition has a viscosity of 600 to 2,000 MPa.s as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm. The present invention also relates to a cosmetic care process for keratin materials. Figure for abstract: none

Description

Title of the invention: Care composition for keratin materials and mask containing it Technical field

[0001] The present invention relates to a cosmetic composition and a mask containing the same. In particular, the present invention relates to a care composition for keratin materials and a mask containing the same. STATE OF THE ART

[0002] Skin aging is part of the aging process of the human body, which is not only related to age itself, but is also closely related to external factors, such as exposure to sunlight. Light-induced skin aging ("photoaging") is mainly caused by solar radiation, and as the degradation of the ozone layer worsens, photoaging of the skin becomes increasingly significant, which affects the appearance of the skin.

[0003] As for age-related imperfections, wrinkles are clearly the most representative of these.

[0004] Among these wrinkles, it is possible to distinguish between "pronounced" wrinkles, which are very visible, and which can have a depth of 300 microns or more, "medium" wrinkles, which are visible, and which have a depth in the range between 150 microns and 300 microns, and "light" wrinkles, which are less visible than those above and which have a depth of less than 150 microns.

[0005] For obvious reasons, the presence of wrinkles on the face often poses aesthetic problems which, depending on the person, can be difficult to live with, and there is therefore a need to combat the visibility of wrinkles.

[0006] It is known that these imperfections can be corrected by applying active agents to the skin capable of tightening the skin through a tensor effect, this tension making it possible to smooth the skin and immediately reduce wrinkles and fine lines, or even make them disappear.

[0007] There are a few masks on the market designed to tighten the skin.

[0008] With regard to masks (face masks and eye masks), in order for them to have better impregnation in a mask cloth, the viscosity of the cosmetic composition should be relatively low. However, if the viscosity of the cosmetic composition is too low, the composition will drip from the mask cloth.

[0009] In addition, for masks using alginate wadding as the mask wadding, it is necessary to incorporate cationic ions so that the cosmetic composition is impregnated into the wadding, which could also reduce the stability of the cosmetic composition.

[0010] In order to be commercially acceptable, the composition must be stable over a certain period of time.

[0011] Thus, there is a need to formulate a composition for tightening keratin materials, which is stable and suitable for a mask using alginate wadding as the mask wadding. Summary of the invention

[0012] An object of the present invention is to provide a composition for tightening keratin materials, which is stable and suitable for a mask using alginate wadding as the mask wadding.

[0013] Another object of the present invention is to provide a cosmetic process for tightening keratin materials.

[0014] Thus, according to a first aspect, the present invention provides a care composition for keratin materials in gel form, comprising, in a hydrophilic phase,

[0015] (i) from 0.8% by weight to 1.8% by weight of at least one sodium salt, relative to the total weight of the composition;

[0016] (ii) at least one hydrophilic thickener; and

[0017] (iii) at least one polyol;

[0018] wherein the composition has a viscosity of 600 to 2,000 MPa.s as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm.

[0019] The composition according to the present invention is stable and suitable for a mask, especially those using alginate wadding as the mask wadding.

[0020] The composition according to the present invention has a viscosity of 600 to 2000 MPa.s as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm, and has a jelly-like texture.

[0021] The composition according to the present invention can be used to tighten keratin materials and provide smoothing effectiveness.

[0022] According to a second aspect, the present invention provides a care mask for keratin materials, comprising:

[0023] A) a water-insoluble alginate wadding fabric, and

[0024] B) a composition according to the first aspect of the present invention.

[0025] The composition and mask according to the present invention can be used to tighten keratin materials.

[0026] According to a third aspect, the present invention also provides a cosmetic care process for keratin materials with the mask, comprising:

[0027] I) applying the cotton fabric for mask to the keratin materials; and

[0028] II) applying the composition to the cotton fabric.

[0029] Other objects and characteristics, aspects and advantages of the present invention will appear even more clearly on reading the detailed description and the examples which follow. DETAILED DESCRIPTION OF THE INVENTION

[0030] In this document, unless otherwise indicated, the limits of a range of values ​​are included in this range, in particular in the expressions "between...and..." and "from...to...".

[0031] As used herein, the term "comprising" shall be interpreted to include all specifically mentioned features as well as optional, additional, unspecified features.

[0032] In this document, the use of the term "comprising" also discloses the embodiment in which no features other than the specifically mentioned features are present (i.e. "consisting of").

[0033] Unless otherwise defined, all technical and scientific terms used herein have the meaning commonly understood by those skilled in the art to which the present invention pertains. Where the definition of a term in this specification conflicts with the meaning commonly understood by those skilled in the art to which the present invention pertains, the definition described herein shall apply.

[0034] Unless otherwise specified, all numerical values ​​expressing an amount of ingredients and the like used in the description and claims are to be understood as being modified by the term "about". Therefore, unless otherwise specified, the numerical values ​​and parameters described herein are approximate values ​​which may be modified depending on the desired performance obtained as required.

[0035] In this document, the expression "at least one" used in the present description is equivalent to the expression "one or more".

[0036] For the purposes of the present invention, the term "keratin material" is intended to cover the skin. The skin of the face and the skin of the neck are particularly considered according to the present invention.

[0037] The composition according to the present invention comprises in a hydrophilic phase,

[0038] (i) from 0.8% by weight to 1.8% by weight of at least one sodium salt, relative to the total weight of the composition;

[0039] (ii) at least one hydrophilic thickener; and

[0040] (iii) at least one polyol;

[0041] wherein the composition has a viscosity of 600 to 2,000 MPa.s, as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm. Sodium salts

[0042] According to the first aspect, the composition of the present invention comprises at least one sodium salt.

[0043] The sodium salt may be a sodium salt of an organic or inorganic acid.

[0044] As examples of sodium salts of organic acid, mention may be made, for example, of sodium sulfate, sodium phosphate, sodium nitrate, sodium carbonate, a sodium halide, for example, a chloride, a bromide, an iodide, and the like.

[0045] Examples of organic acid sodium salts include sodium salts of carboxylic acids, for example, linear or branched, saturated or unsaturated carboxylic acids. The saturated or unsaturated carboxylic acid preferably has 1 to 30, preferably 3 to 18, or preferably 5 to 12, carbon atoms. Useful carboxylic acids also include hydroxyl carboxylic acids, including mono- and poly-hydroxyl carboxylic acids. Examples of useful organic acids include, for example, citric acid, pantothenic acid, ascorbic acid, acetic acid, tartaric acid and the like, preferably citric acid.

[0046] Thus, the sodium salt is chosen from sodium sulfate, sodium phosphate, sodium nitrate, sodium carbonate, a sodium halide, sodium salts of linear or branched, saturated or unsaturated carboxylic acids containing 1 to 30 carbon atoms, and a combination thereof.

[0047] In certain preferred embodiments, the composition comprises at least one sodium salt selected from sodium acetate, sodium citrate, sodium tartrate, and a combination thereof.

[0048] The sodium salt is used in an amount sufficient to form a gel with an alginate in a mask fabric.

[0049] Advantageously, the sodium salt is present in an amount ranging from 0.8 wt% to 1.8 wt%, preferably from 0.9 wt% to 1.6 wt%, more preferably from 0.95 wt% to 1.55 wt%, based on the total weight of the composition. Hydrophilic thickener

[0050] According to the first aspect, the composition of the present invention comprises at least one hydrophilic thickener.

[0051] The term "hydrophilic thickener" is intended to mean a compound capable of increasing the viscosity of the aqueous phase of the composition.

[0052] Hydrophilic thickeners can be used alone or in combination.

[0053] As hydrophilic thickeners, mention may in particular be made of water-soluble or water-dispersible thickening polymers. They may in particular be chosen from:

[0054] - polyvinylpyrrolidone,

[0055] - polyvinyl alcohol,

[0056] - modified or unmodified carboxy vinyl polymers, such as the products sold under the name Carbopol® (CTFA name: carbomer) by the Goodrich company;

[0057] - crosslinked or non-crosslinked homopolymers or copolymers of acid acrylic or methacrylic acid or salts thereof and esters thereof, such as carbomer, polyacrylate cross-linked polymer-6, polyacrylates, polymethacrylates, acrylate / C10-30 alkyl acrylate cross-linked polymer, and in particular the products sold under the names Versicol F® or Versicol K® or Salcare SC95 by the company Allied Colloid, Ultrahold 8® by the company Ciba-Geigy, such as the product sold under the name SEPIMAX ZEN by the company SEPPIC, the products sold under the names Lubrajel and Norgel by the company Guardian or under the name Hispagel by the company Hispano Chimica, Synthalen polyacrylic acids type K;

[0058] - polyacrylamides;

[0059] - copolymers of acrylic acid and acrylamide sold in the form of their salt sodium under the names Reten® by the Hercules company, poly(sodium methacrylate) sold under the name Darvan No. 7® by the Vanderbilt company, sodium salts of polyhydroxycarboxylic acids sold under the name Hydagen F® by the Henkel company;

[0060] - homopolymers and copolymers of 2-acrylamido-2-acid methylpropanesulfonic acid, which are optionally crosslinked and / or neutralized, for example poly(2-acrylamido-2-methylpropanesulfonic acid) sold by the company Clariant under the name Hostacerin AMPS® (CTFA name: ammonium polyacryldimethyltauramide);

[0061] - crosslinked anionic copolymers of acrylamide / AMPS, in the form of an E / O emulsion, such as those sold under the name Sepigel 305 (CTFA name: Polyacrylamide / C13-14 Isoparaffin / Laureth-7) and under the name Simulgel 600 (name CTFA: Acrylamide / Sodium acryloyldimethyltaurate copolymer / Isohexadecane / Polysorbate 80) by the company SEPPIC;

[0062] - polyacrylic acid / alkyl acrylate copolymers of the Pemulen type;

[0063] - polysaccharide biopolymers, for example xanthan gum, guar gum, gum arabic, locust bean gum, acacia gum, scleroglucans, chitin derivatives and chitosan derivatives, carrageenans, gellans, alginates, or celluloses such as microcrystalline cellulose, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose and hydroxypropylcellulose. Examples include xanthan gum sold under the trade name Keltrol® CG-T by CP Kelco;

[0064] - hydrophilic sublimated silicas obtained by high temperature hydrolysis of a volatile silicon compound in an oxyhydrogen flame, producing a finely divided silica. Hydrophilic silicas have a large number of silanol groups on their surface. Such hydrophilic silicas are, for example, sold under the names Aerosil 130®, Aerosil 200®, Aerosil 255®, Aerosil 300® and Aerosil 380® by the company Degussa, or Cab-O-Sil HS-5®, Cab-O-Sil EH-5®, Cab-O-Sil LM-130®, Cab-O-Sil MS-55® and Cab-O-Sil M-5® by the company Cabot. They may preferably have a particle size that may be nanometric to micrometric, for example, in the range of about 5 to 200 nm;

[0065] - hydrophilic clays;

[0066] - associative polymers, for example PEG-150 / alcohol copolymer stearyl / SMDI sold under the name Aculyn 46 by Rohm & Haas, or the steareth-100 / PEG-136 / HDI copolymer sold under the name Rheolate FX 1100 by Elementis;

[0067] - and mixtures thereof.

[0068] In certain embodiments, the hydrophilic thickener is selected from crosslinked or non-crosslinked homopolymers or copolymers of acrylic acid or methacrylic acid or salts thereof and esters thereof.

[0069] In some embodiments, the hydrophilic thickener is selected from a carbomer, a polyacrylate-6 crosslinked polymer, polyacrylates, polymethacrylates, an acrylates / C10-30 alkyl acrylate crosslinked polymer, and combinations thereof.

[0070] Advantageously, the hydrophilic thickener is present in an amount ranging from 0.9 wt% to 1.5 wt%, preferably from 1 wt% to 1.5 wt%, more preferably from 1 wt% to 1.3 wt%, based on the total weight of the composition. Hydrophilic phase

[0071] The composition of the present invention comprises a hydrophilic phase.

[0072] The composition according to the present invention comprises at least one polyol in the hydrophilic phase.

[0073] The term "polyol" should be understood as meaning, within the meaning of the present disclosure, an organic molecule comprising at least two free hydroxyl groups. The polyols of the composition may be glycols or compounds comprising numerous hydroxyl groups. The one or more polyols are liquid at room temperature (25°C). The one or more polyols may comprise from 2 to 10 carbon atoms, preferably from 3 to 10 carbon atoms, more preferably from 3 to 8 carbon atoms.

[0074] The polyols that may be included in the compositions of the present disclosure, in some cases, are selected from ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, diethylene glycol, dipropylene glycol, 1,3-propanediol, polyethylene glycols, caprylyl alcohol, diglycerin, glycerin, or mixtures thereof. In some cases, the polyol is butylene glycol. In certain other cases, the at least one polyol comprises butylene glycol. Additionally, in some cases, the compositions comprise at least butylene glycol, and one or more polyols other than butylene glycol such as propylene glycol, dipropylene glycol and / or glycerin.

[0075] Non-limiting examples of polyols which may optionally be included in the composition include and / or may be selected from alkanediols and triols such as glycerin, 1,2,6-hexanetriol, trimethylolpropane, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, dipropylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol, 2-methyl-2,4-pentanediol, caprylyl glycol, 1,2-hexanediol, 1,2-pentanediol and 4-methyl-1,2-pentanediol; glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono-n-propyl ether, ethylene glycol mono-isopropyl ether,diethylene glycol mono-isopropyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol mono-t-butyl ether, diethylene glycol mono-t-butyl ether, 1-methyl-l-methoxybutanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-t-butyl ether, propylene glycol mono-n-propyl ether, propylene glycol mono-isopropyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-isopropyl ether, sorbitol, sorbitan, triacetin, and a mixture thereof.

[0076] The one or more polyols may optionally be glycerin, glycols and glycol ethers such as, for example, ethylene glycol monomethyl, monoethyl and monobutyl ethers, propylene glycol or ethers thereof such as, for example, propylene glycol monomethyl ether, butylene glycol, hexylene glycol, dipropylene glycol as well as diethylene glycol alkyl ethers, for example, diethylene glycol monoethyl ether or monobutyl ether.

[0077] In some cases, the one or more polyols are selected from glycerin, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, 1,3-propanediol, diethylene glycol, dipropylene glycol, caprylyl glycol, glycerin, and a mixture thereof.

[0078] Preferably, the glycols are selected from the group consisting of glycerin, hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, and combinations thereof.

[0079] Even more preferably, the at least one polyol comprises butylene glycol and glycerin.

[0080] Advantageously, the polyol is present in the composition of the present invention in an amount ranging from 2 wt% to 50 wt%, more preferably from 4 wt% to 40 wt%, most preferably from 4 wt% to 20 wt%, based on the total weight of the composition.

[0081] The composition according to the present invention may also comprise from 50% by weight to 95% by weight of water, preferably from 60% by weight to 90% by weight of water, more preferably from 70% by weight to 90% by weight of water relative to the total weight of the composition.

[0082] The composition according to the present invention does not comprise an oily phase. Additional cosmetic active ingredients

[0083] Depending on the final objective, the composition according to the present invention may comprise one or more additional cosmetic active ingredients.

[0084] As cosmetic active ingredients that can be used in the composition of the present invention, examples that can be mentioned include enzymes, flavonoids, anti-aging agents, humectants, tightening agents, soothing agents, additional ferments, and mixtures thereof.

[0085] It is easy for a person skilled in the art to adjust the amount of the additional cosmetic active ingredient based on the end use of the composition according to the present invention. Additional adjuvants or additives

[0086] The composition of the present invention may comprise conventional cosmetic adjuvants or additives, for example, perfumes, chelating agents (e.g., disodium EDTA), preservatives (e.g., chlorphenesin and phenoxyethanol) and bactericides (e.g., hydroxyacetophenone), and mixtures thereof.

[0087] A person skilled in the art can choose the amount of conventional adjuvants or additives so as not to have a negative impact on the final use of the composition according to the present invention.

[0088] The composition according to the present invention does not comprise a surfactant.

[0089] According to a preferred embodiment, the present invention provides a care composition for keratin materials in the form of a gel, comprising, in a hydrophilic phase relative to the total weight of the composition,

[0090] (i) from 0.9% by weight to 1.6% by weight of at least one sodium salt;

[0091] (ii) from 0.9% by weight to 1.5% by weight of at least one hydrophilic thickener chosen from crosslinked or non-crosslinked homopolymers or copolymers of acrylic acid or methacrylic acid or the salts thereof and the esters thereof; and

[0092] (iii) from 4% by weight to 20% by weight of at least one polyol selected from glycerin, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, 1,3-propanediol, diethylene glycol, dipropylene glycol, caprylyl glycol, glycerin, and a mixture thereof;

[0093] wherein the composition has a viscosity of 600 to 2,000 MPa.s, as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm.

[0094] The composition according to the present invention is intended to be used in combination with a water-insoluble alginate wadding fabric.

[0095] According to the second aspect, the present invention provides a care mask for keratin materials, comprising:

[0096] A) a water-insoluble alginate wadding fabric, and

[0097] B) a composition according to the first aspect of the present invention. Water-insoluble alginate wadding tissues

[0098] For the purposes of the invention, the term "water insoluble" means that the mask wadding is not soluble in water and does not disintegrate upon immersion in water.

[0099] One skilled in the art can select a suitable mask batting and the weight ratio of the mask batting used and the composition according to the present invention based on the nature of the composition.

[0100] In particular, the mask wadding fabric used in the present invention is an alginate wadding fabric.

[0101] Alginate wadding fabrics are known in the art and are described in WO2020001069A1.

[0102] For example, an alginate gauze may comprise a water-insoluble alginate selected from calcium alginate, strontium alginate, zinc alginate, copper alginate, manganese alginate, or a mixture thereof, preferably calcium alginate, preferably in an amount in the range of 20 wt% to 90 wt%, preferably 20 wt% to 50 wt%, based on the total weight of the gauze.

[0103] The fleece fabric may consist of one or more layers. If a multi-layer fleece fabric is used, the material of each layer may be the same or different. The multi-layer fleece fabric may be prepared by superimposing multiple layers made of the above-mentioned materials.

[0104] The wadding fabric can have a variety of shapes, depending on the desired use and the characteristic of the mask.

[0105] The fleece fabric is typically designed to conform to the area of ​​the skin to which topical application is desired. For example, when the mask is applied to the face, the fleece mask fabric is designed to conform to the shape of the face, avoiding, if necessary, the eye, nostril, and mouth areas.

[0106] The mask may be contained in a package having two separate chambers, one for the mask wadding, the other for the gel composition. Preparation and use

[0107] The composition according to the present invention can be prepared by common practice.

[0108] The composition according to the present invention is intended for topical application and may in particular constitute a composition intended for the care of keratin materials, and in particular human skin.

[0109] In particular, the composition according to the present invention can be used in combination with a water-insoluble alginate wadding fabric so as to tighten keratin materials, and in particular human skin.

[0110] When the composition is applied to an alginate-wrapped fabric to form a mask, the sodium salt may react with the alginate to gel.

[0111] According to the third aspect, the present invention provides a cosmetic care process for keratin materials, in particular human skin, with the mask, comprising:

[0112] I) the application of the cotton fabric for mask on the keratin materials, and

[0113] II) the application of the composition on the cotton fabric.

[0114] In particular, the keratin materials are facial skin and / or eye skin.

[0115] After the composition is applied to the wadded fabric, the wadded fabric becomes more transparent and shrinks, then the wadded fabric adheres to the keratin materials, especially the skin, and provides the feeling of tightening of the skin.

[0116] The mask according to the present invention will provide a new user experience and satisfactory smoothing efficiency.

[0117] The present invention is illustrated in more detail by the examples described below, which are given by way of illustration and not limitation. Examples

[0118] The main raw materials used, the trade names and the suppliers of these materials are listed in Table 1.

[0119] [Tables 1] INCI name Trade name Supplier HYDROXYACETO PHENONE SYMSAVE HO SYMRISE CHLORPHENESIN NIPAGUARD CP HP CLARIANT CARBOMER CARBOPOL 980 POLYMER LUBRIZOL POLYACRYLATE CR OSSPOLYMER-6 SEPIMAX ZEN SEPPIC GLYCERIN DISTILLED GLYCERIN, PACK ED MB OLEO MISR BUTYLENE GLY COL 1.3 BUTYLENE GLYCOL ALZO SODIUM CITRATE TRISODIUM CITRATE DIHYDR ATE FINE GRANULAR BELGIAN CITRIC POTASSIUM HYDRO

[0120] Invention Examples 1 to 5 and Comparative Examples 1 to 5

[0121] The compositions of the inventive examples (EI) 1 to 5 and of the comparative examples (CE) 1 to 5 were prepared according to the quantities given in Tables 2 and 3. The quantity of each component is given in % by weight of the total weight of the composition containing it.

[0122] [Tables2] Components Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 WATER 89.0 89.9 89.95 89.35 87.55 GLYCERIN 5 5 5 5 5 BUTYLENE GLYCOL 2 2 2 2 2 HYDROXYACETOPHENON E 0.5 0.5 0.5 0.5 0.5 CHLORPHENESIN 0.2 0.2 0.2 0.2 0.2 CARBOMER 0.8 0.7 0.8 0.8 0.6 POLYACRYLATE CROSS POLYMER-6 0.2 0.5 0.2 0.5 0.5 SODIUM CITRATE 1.2 1.2 0.95 1.55 0.95 POTASSIUM HYDROXIDE 0.1 0.1 0.1 0.1 0.1

[0123] [Tables3] EC components. 1 EC. 2 CE. 3 EC. 4 CE. 5 WATER 88.3 89.95 87.29 90.15 88.9 GLYCERIN 5 5 5 5 5 BUTYLENE GLY COL 2 2 2 2 2 HYDROXYACETO PHENONE 0.5 0.5 0.5 0.5 0.5 CHLORPHENESIN 0.2 0.2 0.2 0.2 0.2 CARBOMER 0.8 0.6 - 0.8 0.8 POLYACRYLATE CR OSSPOLYMER-6 0.7 0.2 1.7 0.5 0.5 SODIUM CITRATE 2.4 1.2 2 0.75 2 POTASSIUM HYDRO XIDE 0.1 0.1 - 0.1 0.1 BIOSACCHARIDE G UM-1 - - 1 - - CITRIC ACID - - 0.31 - -

[0124] Preparation procedure:

[0125] The compositions listed above were prepared as follows, taking as an example the composition of formula 1 of the invention:

[0126] 1). mixture of water, glycerin, butylene glycol, hydroxyacetophenone and chlorphenesin and heating the mixture to 60°C;

[0127] 2) addition of carbomer and crosslinked polymer-6 of polyacrylate in the mixture under hustle ;

[0128] 3). Adding the remaining ingredients to obtain the composition and stirring to obtain a gel. Assessment

[0129] Each composition of Invention Examples 1 to 5 and Comparative Examples 1 to 5 was evaluated in terms of viscosity and stability. Viscosity

[0130] Viscosity was measured at 25°C, using a Rheomat 100 Plus viscometer equipped with an M3 spindle (unless otherwise stated), the measurement being carried out after 10 minutes of spindle rotation in a sample (time after which stabilisation of viscosity and spindle rotation speed are observed), at a shear rate of 200 rpm. Stability

[0131] Stability was evaluated as follows:

[0132] 1) filling 40 ml of a sample into a 60 ml glass bottle and preparation of six bottles for each composition to be tested;

[0133] 2) placing a bottle in the sun (for the sun test), a bottle at room temperature, one bottle in a refrigerator at 4°C, one bottle in an oven at 37°C, and one bottle in an oven at 45°C (for stability tests at different temperatures), and one bottle in an oven with a temperature cycle of -20°C to 20°C (for cycle stability); and

[0134] 3) observation of the appearance of the samples after 24 hours for the sun test, 2 months for stability tests at different temperatures or 10 days for cycle stability.

[0135] Stability will be evaluated as a PASS if the composition maintains a uniform appearance after all stability tests at different temperatures and the cycle stability test, otherwise it will be evaluated as a FAIL.

[0136] The viscosity and stability of the compositions according to the comparative examples and the invention examples were listed in Table 4.

[0137] [Tables4] Properties Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 EC. 1 EC. 2 CE. 3 EC. 4 CE. 5 Viscosity (MPa.s) 1 070 750 1 700 650 850 190 390 3 200 2 400 650 Stability SUCCEED SUCCESS SUCCEED SUCCESS SUCCESS SUCCESS SUCCESS SUCCESS SSI TE

[0138] It is found that the composition according to the present invention has a viscosity suitable for topical application and is stable.

[0139] In a consumer test, the resulting compositions were applied to an alginate cotton cloth (includes calcium alginate in an amount of 40% by weight, relative to the total weight of the cotton cloth) on the face of 14 female volunteers aged 19 to 40 years (5 of whom had combination skin, 4 normal skin, 3 dry skin, 2 oily skin), each volunteer gave their impression of the application and the feeling on the skin for each composition, and it was observed that:

[0140] 1) the compositions of the invention examples 1 to 5 were easy to spread on the fabric cotton wool and there were no dripping problems when the compositions were applied to the cotton wool, the cotton wool became transparent and shrank, the cotton wool adhered very well to the skin;

[0141] 2) there was a dripping problem and the wadding fabric was falling apart when the composition of comparative example 1 was applied to the wadded fabric;

[0142] 3) there was a dripping problem when the composition of the example comparative 2 was applied on the wadded fabric;

[0143] 4) the composition of comparative example 3 was not easy to spread on the fabric wadded and the wadded fabric disintegrated when the composition of Comparative Example 3 was applied to the wadded fabric;

[0144] 5) after the composition of Comparative Example 4 has been applied to the fabric wadded, the wadded fabric did not change obviously, and the wadded fabric did not become transparent and the user did not feel any tightening due to the wadded fabric;

[0145] 6) when the composition of Comparative Example 5 was applied to the wadded fabric, the wadded fabric was falling apart.

[0146] In addition, shrinkage of the fleece on the directed machine was determined 10 minutes after a composition to be evaluated was applied to the fleece and the results are summarized in Table 5.

[0147] [Tables5] Properties Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 EC. 1* EC. 2* EC. 3 EC. 4 EC. 5 Tissue shrinkage in the machine direction 14% 14% 8% 17% 8% NA

[0148] NA: not tested since the composition does not meet the usage requirements.

[0149] To summarize, the mask according to the present invention can tighten the skin and provide smoothing effectiveness.

Claims

Claims

1. A care composition for keratin materials in gel form, comprising, in a hydrophilic phase, (i) from 0.8% by weight to 1.8% by weight of at least one sodium salt, relative to the total weight of the composition; (ii) from 0.9% by weight to 1.5% by weight relative to the total weight of the composition of at least one hydrophilic thickener chosen from crosslinked or non-crosslinked homopolymers or copolymers of acrylic acid or methacrylic acid or the salts thereof and the esters thereof; and (iii) at least one polyol; wherein the composition has a viscosity of 600 to 2,000 MPa.s as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm.

2. A composition according to claim 1, wherein the sodium salt is selected from sodium sulfate, sodium phosphate, sodium nitrate, sodium carbonate, sodium halide, sodium salts of linear or branched, saturated or unsaturated carboxylic acids having 1 to 30 carbon atoms, and a combination thereof, preferably the sodium salt is selected from sodium acetate, sodium citrate, sodium tartrate, and a combination thereof.

3. A composition according to claim 1 or 2, wherein the sodium salt is present in an amount ranging from 0.8 wt% to 1.8 wt%, preferably from 0.9 wt% to 1.6 wt%, more preferably from 0.95 wt% to 1.55 wt%, based on the total weight of the composition.

4. A composition according to any one of claims 1 to 3, wherein the hydrophilic thickener is selected from a carbomer, a polyacrylate-6 crosslinked polymer, polyacrylates, polymethacrylates, a crosslinked polymer of acrylates / C10-30 alkyl acrylate, and combinations thereof.

5. A composition according to any one of claims 1 to 4, wherein the hydrophilic thickener is present in an amount ranging from 1 wt% to 1.5 wt%, more preferably from 1 wt% to 1.3 wt%, based on the total weight of the composition.

6. A composition according to any one of claims 1 to 5 wherein the polyol has from 2 to 10 carbon atoms, from 3 to 10 carbon atoms, more preferably from 3 to 8 carbon atoms, even more preferably, the polyol is selected from glycerin, hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, and combinations thereof.

7. A composition according to claim 1 comprising, relative to the total weight of the composition, (i) from 0.9% by weight to 1.6% by weight of at least one sodium salt; (ii) from 0.9% by weight to 1.5% by weight of at least one hydrophilic thickener selected from crosslinked or non-crosslinked homopolymers or copolymers of acrylic acid or methacrylic acid or the salts thereof and the esters thereof; and (iii) from 4% by weight to 20% by weight of at least one polyol selected from glycerin, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, 1,3-propanediol, diethylene glycol, dipropylene glycol, caprylyl glycol, and a mixture thereof; wherein the composition has a viscosity of 600 to 2,000 MPa.s, as determined with a Rheomat 100 Plus viscometer equipped with an M3 spindle at a shear rate of 200 rpm.

8. Care mask for keratin materials, comprising: A) a water-insoluble alginate wadding fabric, and B) the composition according to any one of claims 1 to 7.

9. A mask according to claim 8, wherein the water-insoluble cotton gauze is an alginate cotton gauze comprising a water-insoluble alginate selected from calcium alginate, strontium alginate, zinc alginate, copper alginate, manganese alginate, or a mixture thereof, preferably calcium alginate, preferably in an amount in the range of 20 wt% to 80 wt%, preferably 20 wt% to 50 wt%, based on the total weight of the cotton gauze.

10. Cosmetic care process for keratin materials with the mask according to claim 8 or 9, comprising: I) applying the cotton fabric to the keratin materials; and II) applying the composition to the cotton fabric.