Keratinous material care mask

Abstract

Keratinous material care mask The present invention relates to a keratinous material care mask, comprising: A) a mask fabric comprising at least one water-insoluble multivalent metal salt, which is loaded with at least one glycosaminoglycan, and B) a composition on the mask fabric, comprising: a) at least one non-ionic polysaccharide selected from mannose homopolymers, mannose and glucose copolymers, mannose and galactose copolymers, and a combination thereof; b) at least one water-soluble alkali metal salt. The present invention also relates to a non-therapeutic method for caring for keratinous material with said mask. Figure for abstract: none

Description

Title of the invention: Keratinous material treatment mask Technical field

[0001] The present invention relates to a mask for caring for keratinous materials and a non-therapeutic method for caring for keratinous materials with said mask. STATE OF THE ART

[0002] The skin is the protective barrier of the human body. It protects the inside of the body against physical injuries (such as trauma) and biological injuries (such as bacteria, viruses or fungi).

[0003] The development of formulas dedicated to skin care is ongoing.

[0004] Hydrogel is a kind of solid gel comprising different types of polymers, which can hold a large amount of water. The technology is widely used as a kind of medical dressing to provide the effect of soothing or healing wounds. In the cosmetic field, a hydrogel can be used as a kind of substrate in the form of a sheet mask.

[0005] The hydrogel mask releases cosmetic ingredients at room temperature and delivers them to the skin.

[0006] However, some hydrogel masks are not stable at high temperature such as 45°C, indicating that the exudate released from the compositions in the hydrogel masks is either too high or too low, so that their shelf life is negatively affected.

[0007] There is therefore a need to develop a mask which is stable at a high temperature such as 45°C. Summary of the invention

[0008] An object of the present invention is to develop a mask which is stable at a high temperature such as 45°C.

[0009] Thus, according to a first aspect, the present invention provides a mask, preferably for caring for keratinous materials, comprising: A. a mask fabric comprising at least one water-insoluble multivalent metal salt, which is loaded with at least one glycosaminoglycan, and B. a composition on the mask fabric, comprising: a. at least one non-ionic polysaccharide selected from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and one of their combinations; b. at least one water-soluble alkali metal salt.

[0010] According to a second aspect, the present invention also provides a non-therapeutic method for caring for keratinous materials, comprising the application of the mask according to the present invention to the keratinous materials.

[0011] The inventors have found that the mask of the present invention is stable for at least 2 months at a high temperature such as 45°C.

[0012] The viscosity of the exudate from the composition of the mask of the present invention is a key parameter for measuring the stability of the mask at high temperature.

[0013] As used herein, "stable" means that the exudate from the composition in the mask of the present invention has a viscosity of 50 mPa-s to 350 mPa-s after the mask has been stored for 2 months at 45°C.

[0014] Other subjects and features, aspects and advantages of the present invention will be set forth in the following description, and in part, will be obvious from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] As used herein, unless otherwise indicated, the limits of a range of values ​​are included within that range, particularly in the expressions "between...and..." and "from...to...".

[0016] As used herein, the term "comprising" shall be interpreted to encompass all specifically cited features as well as optional, additional, unspecified features.

[0017] As used herein, 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").

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as 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.

[0019] Unless otherwise specified, all numerical values ​​expressing an amount of ingredients and the like used in the specification and claims are to be understood as being modified by the term "about". Accordingly, unless otherwise specified, the numerical values ​​and parameters described herein are approximate values ​​which may be changed depending on the desired performance obtained as required.

[0020] As used herein, the term "at least one" as used in this description is equivalent to the term "one or more".

[0021] For the purposes of the present invention, the term "keratinous material" is intended to cover the skin. Facial skin and the skin around the eyes are particularly considered according to the present invention.

[0022] The mask according to the present invention comprises: A. a mask fabric comprising at least one water-insoluble multivalent metal salt, which is loaded with at least one glycosaminoglycan, and B. a composition on the mask fabric, comprising: a. at least one non-ionic polysaccharide selected from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and one of their combinations; b. at least one water-soluble alkali metal salt. Mask fabric

[0023] The mask according to the present invention comprises a mask fabric comprising at least one water-insoluble multivalent metal salt.

[0024] Preferably, the mask fabric is a water-insoluble mask fabric.

[0025] For the purposes of the present invention, the expression “water-insoluble mask fabric” » means that the mask fabric is not soluble in water, e.g., having a solubility of less than 0.01 g / 100 g of water or only slightly soluble in water, e.g., having a solubility of less than 0.5 g / 100 g of water, nor does it decompose in its raw state upon immersion in water.

[0026] The mask fabric may be a woven or non-woven fabric.

[0027] Preferably, the mask fabric comprises at least one water-insoluble multivalent metal salt with at least one other fiber selected from natural fibers such as cotton, pulp, bamboo, and cellulose fibers, semi-natural fibers such as viscose rayon fibers, and synthetic fibers such as polyester fibers, polyethylene terephthalate fibers, polyethylene fibers, and polypropylene fibers. Two or more fibers selected from the other fibers may be used in combination.

[0028] The mask fabric can be made in a wide variety of shapes, such as flat pads, thick pads, thin sheets of irregular thickness, depending on the desired use and the characteristic of the mask. For example, the mask fabric is typically designed to conform to the area of ​​the skin in the case of a mask on which topical application is desired. To this end, when the mask is applied to the face, the mask fabric is designed to match the shape of the face avoiding, if necessary, the areas of the eyes, nostrils and mouth. Non-limiting examples of the mask fabrics useful in the present invention are described, for example, in patent application WO 02 / 062132 or EP 2489286A.

[0029] Preferably, the water-insoluble multivalent metal salt is chosen from alginates.

[0030] More preferably, the water-insoluble multivalent metal salt is chosen from calcium alginate, strontium alginate, zinc alginate, copper alginate, manganese alginate, and one of their combinations.

[0031] More preferably still, the water-insoluble multivalent metal salt is calcium alginate.

[0032] Advantageously, the mask fabric comprises the water-insoluble multivalent metal salt in an amount ranging from 0.5% by weight to 30% by weight, preferably from 2% by weight to 25% by weight, more preferably from 5% by weight to 20% by weight, even more preferably from 8% by weight to 18% by weight, relative to the total weight of the mask fabric.

[0033] In particular, the mask fabric comprises water-insoluble alginate, in particular calcium alginate, in an amount ranging from 2% by weight to 30% by weight, preferably from 5% by weight to 20% by weight, more preferably from 8% by weight to 18% by weight, relative to the total weight of the mask fabric. Glycosaminoglycans

[0034] The mask fabric is loaded with at least one glycosaminoglycan.

[0035] Glycosaminoglycans (GAGs) are also called acidic mucopolysaccharides due to their high water-binding capacity, their carbohydrate nature, and their acidic nature derived from the many negative charges they contain. The strong anionic nature of GAGs is explained by the presence of carboxylate groups.

[0036] Suitable examples of glycosaminoglycans are hyaluronic acid (HA), heparan sulfate (HS), heparin (HP), chondroitin, chondroitin sulfate (CS), chondroitin sulfate 4 or chondroitin sulfate A (CSA), chondroitin sulfate 6 or chondroitin sulfate C (CSC), dermatan sulfate or chondroitin sulfate B (CSB) and keratin sulfate (KS).

[0037] Preferably, the glycosaminoglycan is chosen from hyaluronic acid and its derivatives.

[0038] In the context of the present invention, the expression "hyaluronic acid and its derivatives" covers the basic hyaluronic acid unit which includes the smallest hyaluronic acid moiety comprising a disaccharide dimer, namely D-glucuronic acid and N-acetylglucosamine.

[0039] The expression "hyaluronic acid and its derivatives" also includes, in the context of the present invention, the linear polymer comprising the polymeric unit described above, linked together in the chain via alternating beta(1,4) and beta(1,3) glycosidic bonds, having an average molecular weight (MW) which can vary between 380 and 13,000,000 g / mol. This weight-average molecular weight depends largely on the source from which the hyaluronic acid is obtained and / or the preparation processes.

[0040] The expression "hyaluronic acid and its derivatives" also includes all fractions or sub-units of hyaluronic acid having a weight average molecular weight in particular in the weight average molecular weight range recalled above.

[0041] Preferably, the hyaluronic acid fractions suitable for the use covered by the present invention have a weight average molecular weight between 50,000 and 5,000,000, in particular between 100,000 and 5,000,000, especially between 400,000 and 5,000,000 g / mol. In this case, the hyaluronic acid fractions have a weight average molecular weight of between 400,000 and 5,000,000 g / mol of high molecular weight hyaluronic acid.

[0042] Alternatively, hyaluronic acid fractions which may also be suitable for use in the present invention are selected from those having a molecular weight between 50,000 and 400,000 g / mol (intermediate molecular weight hyaluronic acid) and from those having a molecular weight below 50,000 g / mol (low molecular weight hyaluronic acid).

[0043] The expression "hyaluronic acid and its derivatives" also includes, in the context of the present invention, hyaluronic acid salts, and in particular alkali metal salts such as the sodium salt and the potassium salt.

[0044] Finally, the expression "hyaluronic acid and its derivatives" also includes hyaluronic acid esters, in particular, those in which all or part of the carboxylic groups of the acid functions are esterified with oxyethylenated alkyls or alcohols, containing from 1 to 20 carbon atoms, in particular with a degree of substitution at the D-glucuronic acid of the hyaluronic acid ranging from 0.5 to 50 percent. Mention may in particular be made of methyl, ethyl, n-propyl, n-pentyl, benzyl and dodecyl esters of hyaluronic acid.

[0045] The molecular weights indicated above are also valid for hyaluronic acid esters.

[0046] More preferably, the glycosaminoglycan is chosen from hyaluronic acid salts.

[0047] More preferably, the glycosaminoglycan is chosen from sodium hyaluronate, potassium hyaluronate, and combinations thereof.

[0048] Advantageously, the glycosaminoglycan is loaded onto the mask fabric for the mask of the present invention in an amount ranging from 0.1% by weight to 10% by weight, preferably from 0.1% by weight to 5% by weight, more preferably from 0.2 % by weight to 3% by weight, more preferably from 0.4% by weight to 2% by weight, even more preferably from 0.6% by weight to 1.8% by weight, relative to the total weight of the mask fabric. Non-ionic polysaccharides

[0049] The composition in the mask of the present invention comprises at least one non-ionic polysaccharide selected from mannose homopolymers, mannose and glucose copolymers, mannose and galactose copolymers, and a combination thereof.

[0050] Preferably, homopolymers indicate polymers with a polymer degree between 2 and 6.

[0051] Preferably, the copolymers indicate polymers with a number average molecular weight of 10,000-2,000,000 g / mol, preferably 20,000-1,000,000 g / mol, more preferably 50,000-500,000 g / mol.

[0052] Preferably, the non-ionic polysaccharide is chosen from mannan, glucomannan, galactomannan, and one of their combinations.

[0053] Gums comprising mannan, glucomannan, galactomannan, or a combination thereof may also be used as the non-ionic polysaccharide in the composition of the present invention.

[0054] Thus, preferably, the non-ionic polysaccharide is chosen from mannan, glucomannan, galactomannan, konjac gum, Bletilla striata gum, guar gum, fenugreek gum, sesbania gum, locust bean gum, cassia gum, and a combination thereof.

[0055] More preferably, the non-ionic polysaccharide is chosen from mannan, glucomannan, galactomannan, and one of their combinations.

[0056] As examples of commercial glucomannan products useful in the composition according to the present invention, mention may be made of those sold under the name KONJAC GEL CKAA1220 by the company XieLi, and those sold under the name KONJAC FLOUR HWG1002 by the company BLG.

[0057] Advantageously, the non-ionic polysaccharide is present in the composition in the mask of the present invention in an amount ranging from 0.01% by weight to 10% by weight, preferably from 0.02% by weight to 6% by weight, more preferably from 0.05% by weight to 1.5% by weight, even more preferably from 0.1% by weight to 0.8% by weight, most preferably from 0.15% by weight to 0.5% by weight, relative to the total weight of the composition. Water-soluble alkali metal salts

[0058] The composition in the mask according to the present invention comprises at least one water-soluble alkali metal salt.

[0059] The water-soluble alkali metal salt that can be used in the present invention includes all kinds of alkali metals (e.g., Li, Na, K, etc.) that form soluble salts (chlorides, nitrates, etc.) acceptable in the cosmetic field.

[0060] The water-soluble alkali metal salt may be selected from a water-soluble alkali metal salt of inorganic acid(s) and / or organic acid(s). The water-soluble alkali metal salt of inorganic acid may be, for example, alkali metal chlorides, alkali metal salt nitrates, alkali metal sulfate, alkali metal carbonate, alkali metal bicarbonate, alkali metal phosphate, and the like. The water-soluble alkali metal salt of organic acid may be, for example, an alkali metal salt of EDTA, an alkali metal salt of carboxylic acid, an alkali metal salt of lactic acid, an alkali metal salt of acetic acid, an alkali metal salt of formic acid, an alkali metal salt of uric acid, an alkali metal salt of malic acid, an alkali metal salt of tartaric acid, an alkali metal citrate, and the like.

[0061] Preferably, the alkali metal is chosen from Li, Na and K.

[0062] Preferably, the water-soluble alkali metal salt is chosen from the salt disodium ethylenediaminetetraacetic acid, sodium citrate, potassium citrate, and a combination thereof.

[0063] Advantageously, the water-soluble alkali metal salt is present in the composition in the mask of the present invention in an amount ranging from 0.1% by weight to 15% by weight, preferably from 0.2% by weight to 10% by weight, more preferably from 0.3% by weight to 8% by weight, even more preferably from 0.5% by weight to 5% by weight, most preferably from 0.5% by weight to 3% by weight, relative to the total weight of the composition.

[0064] The water-soluble alkali metal salt, preferably sodium citrate, will exhibit ion exchange with the water-insoluble multivalent metal salt, preferably calcium alginate, associated with the glycosaminoglycan, especially sodium hyaluronate, which gives the exudate of the composition a viscosity suitable for application and keeps it stable at high temperature, such as 45°C. Ionic polysaccharides

[0065] Preferably, the composition in the mask according to the present invention comprises an ionic polysaccharide.

[0066] In the context of the present invention, the expression "ionic polysaccharide" should be understood as meaning a polysaccharide in which the number of monosaccharide units contains at least one ionic group.

[0067] Preferably, the ionic polysaccharide is selected from xanthan gum, carrageenan, gellan gum, diutan gum, welan gum, and a combination thereof.

[0068] Xanthan is a heteropolysaccharide produced by aerobic fermentation of the bacterium Xanthomonas campestris. Its structure consists of a main chain of [3-D-glucoses [3(1,4)-linked, similar to cellulose. Every second glucose molecule carries a trisaccharide side chain composed of a [3-D-mannose, a [3-D-glucuronic acid and a terminal [3-D-mannose. The internal mannose residue is usually acetylated on carbon 6. About 30% of the terminal mannose residues carry a pyruvate group linked in chelated form between carbons 4 and 6. Charged glucuronic acids and pyruvic acids are ionizable and are therefore responsible for the anionic nature of xanthan (negative charge up to pH 1). These groups can be neutralized in commercial products with Na+, K+, or Ca2+ ions (Satia Company, 1986). The neutralized form can be converted to the acid form by ion exchange or by dialysis of an acid solution.

[0069] The carrageenans are chosen from carrageenans of type q, K, v, r or X, and their mixtures in all proportions, preferably of type K. The carrageenans of the present invention can be used in acid form or in salified form. Acceptable salts which may be cited in a non-limiting manner include lithium, sodium, potassium, calcium, zinc and ammonium salts or salts obtained with an organic base counterion, such as a primary, secondary or tertiary (C1-C6) alkylamine, in particular triethylamine or butylamine. This primary, secondary or tertiary alkylamine may comprise one or more nitrogen and / or oxygen atoms and may thus comprise, for example, one or more alcohol functions; mention may be made in particular of amino-2-methyl-2-propanol, triethanolamine and dimethylamino-2-propanol. Lysine or 3-(dimethylamino)propylamine can also be mentioned.These sulfated polysaccharides may also comprise a mixture of counterions among those defined above in a non-limiting manner.

[0070] Preferably, the weight average molecular weight of the carrageenans which are useful for the present invention is 300-100,000,000 g / mol, more preferably 10,000-100,000,000 g / mol.

[0071] The sulfur content (counted by SO42) of the carrageenans is preferably between 5% and 40% (calculated on a weight basis relative to the total weight of the carrageenan), more preferably between 7% and 25%, and even more preferably between 15% and 20%.

[0072] Preferably, the carrageenans predominantly comprise the K form, or are in the K form. The term “predominantly” means that the percentage of this type of chain in the composition of the product is greater than or equal to 50%, this proportion possibly being greater than or equal to 80% in certain embodiments. Such carrageenans may be those sold under the names CARRAGEENAN BLK1120 by the company BLG.

[0073] Gellan gum has a recurring tetrasaccharide structure composed of (glucose-glucuronic acid-glucose-rhamnose) units.

[0074] The partial structure of gellan gum is as follows:

[0075] -4)-L-Rhap-(al-3)-D-Glcp-([3-l-4)-D-GlcpA-([3-l-4)-D-Glcp-([3-l-.

[0076] Diutan gum is a biogum that can be produced by fermentation of a bacterial strain of the genus Shingomonas, for example, a bacterial strain of the genus Shingomonas deposited with the American Type Culture Collection (ATCC) under deposit number ATCC 53159. More specifically, diutan gum is an exopolysaccharide that can be produced, i.e., can be obtained, by fermentation of a carbohydrate by bacteria of the genus Shingomonas and, in particular, by a bacterial strain of the genus Shingomonas with deposit number ATCC 53159. Diutan generally has a hexameric repeating unit consisting of four sugars in the backbone (glucose-glucuronic acid-glucose-rhamnose) and a side chain of two rhamnose residues attached to one of the glucose residues. A non-limiting example of a commercially available diutan gum is Kelcocare™ Diutan Gum from CP Kelco.Diutan gum is also commonly referred to as S-657 polysaccharide.

[0077] Welan gum is a biogum that can be produced by fermentation of a bacterial strain of the genus Alcaligenes or the genus Sphingomonas. More specifically, welan gum is an exopolysaccharide that can be produced, i.e. can be obtained, by fermentation of a carbohydrate by a bacterial strain of the genus Alcaligenes or the genus Sphingomonas. Welan gum is a polymer that has a repeating tetrasaccharide backbone chain containing L-mannose, L-rhamnose, D-glucose and D-glucuronic acid. In a particular embodiment, welan gum is obtained by fermentation of a carbohydrate by a bacterial strain of the genus Sphingomonas.

[0078] Preferably, the composition of the present invention comprises at least one ionic polysaccharide selected from xanthan gum, carrageenan, and one of their combinations.

[0079] As examples of commercial xanthan gum products useful in the composition according to the present invention, mention may be made of those sold under the name KELTROL CG-T by the company CP KELCO.

[0080] In certain preferable embodiments, the carrageenan is in the form of chondrus crispus powder.

[0081] Advantageously, the ionic polysaccharide is present in the composition in the mask of the present invention in an amount ranging from 0.01% by weight to 15% by weight, preferably from 0.02% by weight to 8% by weight, more preferably from 0.05% by weight to 4% by weight, even more preferably from 0.1% by weight to 1.5% by weight, most preferably from 0.15% by weight to 1% by weight, relative to the total weight of the composition.

[0082] Preferably, the composition comprises from 0.05% by weight to 0.5% by weight of carrageenan and from 0.1% by weight to 1% by weight of xanthan gum, relative to the total weight of the composition.

[0083] Preferably, the total amount of ionic polysaccharide and non-ionic polysaccharide in the composition of the present invention is from 0.05% by weight to 20% by weight, preferably from 0.08% by weight to 10% by weight, preferably from 0.1% by weight to 5% by weight, more preferably from 0.15% by weight to 2% by weight, even more preferably from 0.3% by weight to 1.5% by weight, relative to the total weight of the composition. Beta-hydroxy acids and their derivatives

[0084] For the purposes of the present invention, preferably, the composition according to the present invention further comprises at least one compound A chosen from betahydroxy acids and their derivatives.

[0085] Compound A is contained in the composition so as to provide antibacterial performance, anti-inflammation and / or hydration.

[0086] The term "beta-hydroxy acid" is intended to mean, according to the present invention, a carboxylic acid having a hydroxyl functional group and a carboxylic functional group separated by two carbon atoms.

[0087] The expression "beta hydroxy acid and its derivatives" includes, in the context of the present invention, beta hydroxy acids as well as beta hydroxy acid salts, and in particular alkali metal salts such as the sodium salt and the potassium salt.

[0088] Preferably, the beta hydroxy acids and their derivatives are chosen from salicylic acid and its derivatives of formula (II):

[0089] in which

[0090] - M is chosen from hydrogen, sodium and potassium;

[0091] - R is hydrogen or C6-C18 acyl.

[0092] Preferably, in formula (I), M is chosen from hydrogen, sodium and potassium, and R is hydrogen or a linear C6-C16 acyl.

[0093] More preferably, compound A is chosen from salicylic acid, sodium salicylate, potassium salicylate, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, and one of their combinations.

[0094] More preferably still, compound A is chosen from salicylic acid, sodium salicylate, potassium salicylate, and one of their combinations.

[0095] Most preferably, the composition according to the present invention comprises salicylic acid.

[0096] Advantageously, compound A is present in an amount ranging from 0.01% by weight to 10% by weight, preferably from 0.01% by weight to 5% by weight, preferably from 0.03% by weight to 2% by weight, and more preferably from 0.05% by weight to 1% by weight, even more preferably from 0.08% by weight to 0.5% by weight, relative to the total weight of the composition. Aqueous phase

[0097] The composition of the present invention may comprise an aqueous phase.

[0098] Preferably, said aqueous phase comprises water.

[0099] Advantageously, water is present in the composition of the present invention in an amount ranging from 60% by weight to 99% by weight, preferably from 65% by weight to 95% by weight, relative to the total weight of the composition.

[0100] Optionally, the aqueous phase comprises a water-miscible organic solvent (at room temperature 25°C) selected from ethanol and polyols having from 2 to 20 carbon atoms, preferably from 2 to 10 carbon atoms, and preferentially having from 2 to 6 carbon atoms, and a combination thereof, such as glycerin, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, caprylyl glycol, dipropylene glycol, diethylene glycol; and a combination thereof.

[0101] Preferably, the composition comprises an organic solvent chosen from glycerin, 1,3-propanediol, and one of their combinations.

[0102] Preferably, the organic solvent is present in an amount ranging from 0.5% by weight to 30% by weight, preferably from 1% by weight to 20% by weight, relative to the total weight of the composition.

[0103] Preferably, the composition comprises from 0.5% by weight to 20% by weight, preferably from 1% by weight to 10% by weight of 1,3-propanediol, relative to the total weight of the composition.

[0104] Preferably, the composition comprises from 0.5% by weight to 30% by weight, preferably from 1% by weight to 20% by weight of glycerin, relative to the total weight of the composition.

[0105] Advantageously, the aqueous phase is present in the composition of the present invention in an amount ranging from 60% by weight to 99.5% by weight, preferably from 65% by weight to 99% by weight, relative to the total weight of the composition. Cosmetic active ingredients

[0106] Depending on the final aim, the composition according to the present invention may comprise one or more cosmetic active ingredients.

[0107] It is easy for the person skilled in the art to adjust the amount of the additional cosmetic active ingredient according to the final use of the composition according to the present invention. Additional adjuvants or additives

[0108] The composition of the present invention may comprise conventional cosmetic adjuvants or additives, for example, perfumes, preservatives and bactericides, pH correcting agents, and combinations thereof.

[0109] The person skilled in the art can choose the amount of additional adjuvants or additives so that it does not negatively impact the end use of the composition according to the present invention.

[0110] According to a preferred embodiment, the present invention provides a mask, preferably for caring for keratinous materials, comprising: A. a mask fabric comprising from 8% by weight to 18% by weight of at least one water-insoluble multivalent metal salt selected from alginates, relative to the total weight of the mask fabric, which is loaded with 0.6% by weight to 1.8% by weight of at least one hyaluronic acid salt, relative to the total weight of the mask fabric, and B. a composition on the mask fabric, preferably in the form of a hydrogel comprising, relative to the total weight of the composition: a. from 0.15% by weight to 0.5% by weight of at least one non-ionic polysaccharide chosen from mannan, glucomannan, galactomannan, and one of their combinations; b. from 0.5% by weight to 3% by weight of at least one water-soluble alkali metal salt selected from ethylenediaminetetraacetic acid disodium salt, sodium citrate, potassium citrate, and a combination thereof; and c. from 0.15% by weight to 1% by weight of at least one ionic polysaccharide selected from xanthan gum, carrageenan, and a combination thereof. Dosage form

[0111] The mask comprises a composition that can form a hydrogel and a mask fabric that contains the water-insoluble multivalent metal salt loaded with the glycosaminoglycan.

[0112] The person skilled in the art can choose a suitable mask fabric and the weight ratio between the mask fabric used and the composition according to the present invention based on the nature of the composition.

[0113] Preferably, the weight ratio between the mask fabric and the composition ranges from 1:0.1 to 1:60. More preferably, the weight ratio between the mask fabric and the composition ranges from 1:0.5 to 1:45. Even more preferably, the weight ratio between the mask fabric and the composition ranges from 1:0.8 to 1:35. Use and method

[0114] The mask according to the present invention is intended for topical application and can be used in particular to care for keratinous materials, and in particular the skin.

[0115] In particular, the composition according to the present invention can be used for the care of keratinous materials, in particular the skin.

[0116] According to the third aspect, the present invention provides a non-therapeutic method for caring for keratinous materials, in particular the skin, comprising the application of the mask as defined above to the keratinous materials.

[0117] In particular, the keratinous materials are the skin of the face and / or the skin around the eyes.

[0118] Preferably, the present invention provides a non-therapeutic method for caring for keratinous materials, in particular the skin, comprising:

[0119] - the application of the mask according to the present invention on keratinous materials;

[0120] - leaving the mask on the keratinous materials for a certain time; And

[0121] - removal of the mask from keratinous materials. EXAMPLES

[0122] The present invention is illustrated in more detail by the examples described below, which are given by way of non-limiting illustrations.

[0123] The main raw materials used, their trade names and their suppliers are listed in Table 1.

[0124] [Tables 1] INCI Name Trade Name Supplier Carrageenan CARRAGEENAN BLK1120 BLG Glucomannan KONJAC FLOUR HWG1002 BLG Xanthan gum KELTROL® CG-T CP KELCO Sodium hyaluronate Sodium hyaluronate (COSMETIC GRADE) SHANDONG TOP SCIENCE BIOTE CH Glycerin (and) glyceryl acrylate / acrylic acid copolymer (and) PVM / MA copolymer EMOGEL OIL F SUZHOU ELECO CHEMICAL INDUSTRY

[0125] Inventive Examples 1-3 and Comparative Examples 1-4

[0126] Masks of Inventive Examples (EI) 1-3 and Comparative Examples (CE) 1-4 were prepared with compositions comprising the ingredients listed in Table 2 (the content is expressed as a percentage by weight of each ingredient relative to the total weight of each composition, unless otherwise indicated) and mask fabrics comprising the ingredients listed in Table 2 (the contents are expressed as percentages by weight relative to the total weight of each fabric):

[0127] [Tables2] El. 1 El. 2 EI.3 EC.l EC. 2 EC. 3 EC. 4 Composition Salicylic acid 0.1 0.1 0.1 1 0.1 0.1 0.1 Sodium citrate 1 1 1 1 0 1 1 Carrageenan 0.12 0.12 0.12 0 0.12 0.12 0.32 Xanthan gum 0.4 0.4 0.4 0 0.4 0.4 0.4 Glucomannan 0.2 0.2 0.2 0 0.2 0.2 0 Glycerin (and) Glyceryl acrylate / acrylic acid copolymer 0 0 0 3 0 0 0 (and) P VM / MA copolymer Glycerin 7 7 7 6 7 7 7 1,3-Propanediol 5 5 5 5 5 5 5 Sodium hyaluronate 0 0 0 0.05 0 0 0 Water QS100 QS100 QS100 QS100 QS100 QS100 QS100 Mask fabric Ca Icium alginate fiber 10 10 15 10 10 10 10 Cellulose fiber 90 90 85 90 90 90 90 Sodium hyaluronate m* 0.8 1.6 0.8 0 0.8 0 0.8

[0128] Sodium hyaluronate*: loaded onto the calcium alginate fiber and cellulose fiber mask fabric, with the amount indicated relative to the total weight of the calcium alginate fiber and the cellulose fiber.

[0129] The masks obtained in inventive examples 1-3 represent the mask according to the present invention.

[0130] The mask of Comparative Example 1 does not comprise a) at least one non-ionic polysaccharide selected from mannose homopolymers, mannose and glucose copolymers, mannose and galactose copolymers, and one of their combinations, and does not comprise at least one glycosaminoglycan loaded on the mask fabric.

[0131] The mask of Comparative Example 2 does not comprise b) at least one water-soluble alkali metal salt in the composition.

[0132] The mask of Comparative Example 3 does not comprise at least one glycosaminoglycan loaded onto the mask fabric.

[0133] The mask of Comparative Example 4 does not comprise a) at least one non-ionic polysaccharide chosen from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and one of their combinations.

[0134] Preparation of the compositions:

[0135] Each composition of Inventive Examples 1-3 and Comparative Examples 1-4 was prepared as follows: 1. Salicylic acid, sodium citrate (if used), sodium hyaluronate (if used) and 1,3-propanediol were introduced into 80°C water in a main pot and dissolved well. 2. Carrageenan (if any), xanthan gum (if any), and glucomannan (if any) were mixed in glycerin at 80°C to obtain mixture A, then mixture A or glycerin (and) glyceryl acrylate / acrylic acid copolymer (and) PVM / MA copolymer was introduced into the main tank with stirring to obtain mixture B. 3. Mixture B was heated to 80#C for 30 minutes, then cooled to room temperature.

[0136] Treatment of mask fabrics:

[0137] Each mask fabric of Inventive Examples 1-3 and Comparative Examples 2 and 4 was loaded with at least one glycosaminoglycan as follows: 1. Sodium hyaluronate was weighed and added into stirring water at room temperature (RT, 25°C) and dissolved well to obtain a mixture; 2. The mixture was sprayed into a mask fabric made of calcium alginate fiber and cellulose fiber using a spraying machine; 3. The mask fabric loaded with the mixture was placed in an oven at 80°C for 1 h to evaporate the water.

[0138] Preparation of masks:

[0139] 30 g of each composition of inventive examples 1-3 and comparative examples 1-4 were weighed and coated proportionally onto 1 g of a mask fabric of inventive examples 1-3 and comparative examples 1-4 using a coating machine to obtain a mask.

[0140] Evaluation: Appearance

[0141] The appearance of the compositions for the masks of Inventive Examples 1-3 and Comparative Examples 1-4 at room temperature (RT, 25°C) was observed with the naked eye. Viscosity

[0142] The masks of inventive examples 1-3 and comparative examples 1-4 were stored in bags at 45°C for 2 months.

[0143] The exudate from each composition contained in the masks of Inventive Examples 1-3 and Comparative Examples 1-4 was poured after the masks had been stored at 45°C for 2 months and their viscosity was determined using a rheometer of the MCR 301 type equipped with a PP25 spindle at a shear rate of 50

[0144] A viscosity in the range of 50 mPa-s to 350 mPa-s is considered reasonable, meaning that the mask is stable.

[0145] The appearance of each composition at room temperature and the viscosity of the exudate from each composition contained in the masks of Inventive Examples 1-3 and Comparative Examples 1-4 after storage for two months at 45°C were summarized in Table 3.

[0146] [Tables3] Properties El. 1 El. 2 EI.3 EC.l EC. 2 EC. 3 EC. 4 Appearance at T Hydrog Hydrog Hydrog Fluid v Hydrog Hydrog Fluid vi A el el el iscous el el squeux Viscosity ( mPa-S) 110 230 120 ND 470 27 ND

[0147] ND: not determined because the composition is a viscous fluid.

[0148] It can be seen from Table 3 that each composition in the masks of inventive examples 1-3 is hydrogel and that the exudate from each composition contained therein has a viscosity suitable for application, which means that each mask of inventive examples 1-3 has good stability at high temperature such as 45°C.

Claims

Claims

1. Mask, preferably for caring for keratinous materials, comprising: A) a mask fabric comprising at least one water-insoluble multivalent metal salt, which is loaded with at least one glycosaminoglycan, B) a composition on the mask fabric, comprising: a) at least one non-ionic polysaccharide chosen from mannose homopolymers, mannose and glucose copolymers, mannose and galactose copolymers, and one of their combinations; b) at least one water-soluble alkali metal salt.

2. The mask of claim 1, wherein the water-insoluble multivalent metal salt is selected from alginates; preferably, the water-insoluble multivalent metal salt is selected from calcium alginate, strontium alginate, zinc alginate, copper alginate, manganese alginate, or a combination thereof; more preferably, the water-insoluble multivalent metal salt is calcium alginate.

3. Mask according to any one of claims 1 and 2, in which the glycosaminoglycan is chosen from hyaluronic acid and its derivatives, preferably chosen from hyaluronic acid salts, more preferably chosen from sodium hyaluronate, potassium hyaluronate, and combinations thereof.

4. A mask according to any one of claims 1 to 3, wherein the non-ionic polysaccharide is selected from mannan, glucomannan, galactomannan, konjac gum, Bletilla striata gum, guar gum, fenugreek gum, sesbania gum, locust bean gum, cassia gum, and a combination thereof; more preferably, the non-ionic polysaccharide is selected from mannan, glucomannan, galactomannan, and a combination thereof.

5. A mask according to any one of claims 1 to 4, wherein the water-soluble alkali metal salt is selected from ethylenediaminetetraacetic acid disodium salt, sodium citrate, potassium citrate, and a combination thereof.

6. A mask according to any one of claims 1 to 5, wherein the composition further comprises an ionic polysaccharide, preferably selected from xanthan gum, carrageenan, gellan gum, diutan gum, welan gum and a combination thereof, preferably selected from xanthan gum, carrageenan, and a combination thereof, preferably the ionic polysaccharide is present in an amount ranging from 0.01% by weight to 15% by weight, preferably from 0.02% by weight to 8% by weight, more preferably from 0.05% by weight to 4% by weight, even more preferably from 0.1% by weight to 1.5% by weight, most preferably from 0.15% by weight to 1% by weight, relative to the total weight of the composition.

7. A mask according to claim 6, wherein the total amount of ionic polysaccharide and non-ionic polysaccharide in the composition is from 0.05 wt% to 20 wt%, preferably from 0.08 wt% to 10 wt%, more preferably from 0.1 wt% to 5 wt%, more preferably from 0.15 wt% to 2 wt%, even more preferably from 0.3 wt% to 1.5 wt%, relative to the total weight of the composition.

8. Mask according to any one of claims 1 to 7, in which the composition further comprises at least one compound A chosen from beta-hydroxy acids and their derivatives; preferably chosen from salicylic acid, sodium salicylate, potassium salicylate, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, and a combination thereof, preferably, compound A is present in an amount ranging from 0.01% by weight to 10% by weight, preferably from 0.01% by weight to 5% by weight, preferably from 0.03% by weight to 2% by weight, and more preferably from 0.05% by weight to 1% by weight, even more preferably from 0.08% by weight to 0.5% by weight, relative to the total weight of the composition.

9. Mask according to claim 1, comprising: A) a mask fabric comprising from 8% by weight to 18% by weight of at least one water-insoluble multivalent metal salt selected from alginates, relative to the total weight of the mask fabric, which is loaded with 0.6% by weight to 1.8% by weight of at least one hyaluronic acid salt, relative to the total weight of the mask fabric, and B) a composition on the mask fabric, preferably in the form of a hydrogel comprising, relative to the total weight of the composition: a) from 0.15% by weight to 0.5% by weight of at least one non-ionic polysaccharide chosen from mannan, glucomannan, galactomannan, and one of their combinations; (b) from 0.5% by weight to 3% by weight of at least one water-soluble alkali metal salt selected from ethylenediaminetetraacetic acid disodium salt, sodium citrate, potassium citrate, and a combination thereof; and (c) from 0.15% by weight to 1% by weight of at least one ionic polysaccharide chosen from xanthan gum, carrageenan, and one of their combinations.