CARE MASK FOR KERATIN MATERIALS

Abstract

CARE MASK FOR KERATIN MATERIALS The present invention relates to a care mask for keratin materials, comprising, i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and ii) a composition impregnated in the occlusive substrate, in which the composition comprises: a) at least one surfactant chosen from polyglyceryl esters of fatty acids with HLB >10 and b) at least one C-glycoside. The present invention also relates to a non-therapeutic method for caring for keratin materials. Figure for abstract: none

Description

Title of the invention: CARE MASK FOR KERATIN MATERIALS Technical field

[0001] The present invention relates to a cosmetic composition. In particular, the present invention relates to a mask, preferably for caring for keratin materials. The present invention also relates to a non-therapeutic method for caring for keratin materials. 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 those caused by bacteria, viruses or fungi).

[0003] The skin is composed of several layers of cells that cover and protect the underlying tissues. The fibrous proteins keratin and collagen form the skeleton of its structure. The outermost of these layers is called the stratum corneum.

[0004] The development of formulas dedicated to skin care is ongoing.

[0005] Occlusive patches are used to stimulate the penetration of active ingredients for transdermal drug delivery, but they require long-term application, for example, more than 8 hours, they are not applicable to the cosmetic field.

[0006] Thus, it is desired to develop similar products such as masks for providing cosmetic active ingredients such as C-glycoside to keratin materials in a short time, for example, in 30 minutes maximum. Summary of the invention

[0007] An objective of the present invention is to provide masks, preferably for the care of keratin materials, which can deliver cosmetic active ingredients to the keratin materials in a maximum of 30 minutes.

[0008] Another objective of the present invention is to provide a non-therapeutic method for caring for keratin materials.

[0009] Therefore, in a first aspect, the present invention provides a mask, preferably for caring for keratin materials, comprising:

[0010] i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and

[0011] ii) a composition impregnated into the occlusive substrate, wherein the composition comprises:

[0012] a) at least one surfactant chosen from polyglyceryl esters of fatty acids with HLB > 10 and

[0013] b) at least one C-glycoside.

[0014] The mask according to the present invention can effectively deliver C-glycoside to keratin materials within 30 minutes.

[0015] The inventors have found that the occlusive substrate with a water vapor transmission rate in a specific range and the surfactant selected from polyglyceryl esters of fatty acids with HLB > 10 allows for good effectiveness on the penetration of the active ingredient contained in the mask, namely C-glycoside, to keratin materials.

[0016] In a second aspect, the present invention provides a non-therapeutic method for caring for keratin materials, comprising applying the mask according to the first aspect of the present invention to the keratin materials.

[0017] Other subjects and characteristics, aspects and advantages of the present invention will become even more apparent upon reading the detailed description and examples which follow. DETAILED DESCRIPTION OF THE INVENTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the field to which the present invention relates. Where the definition of a term in the present invention conflicts with the meaning commonly understood by those skilled in the art in the field to which the present invention relates, the definition described in the present invention shall apply.

[0019] In the following and 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...".

[0020] Furthermore, the expression “at least one” used in the present description is equivalent to the expression “one or more”.

[0021] Throughout this application, the term "comprising" should be interpreted to encompass all specifically mentioned features as well as optional, additional, and unspecified features. 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").

[0022] Unless otherwise indicated, all numerical values ​​expressing an amount of ingredients and the like which are used in the description and claims are to be understood as being modified by the term "about". For Therefore, unless otherwise stated, the numerical values ​​and parameters described herein are approximate values ​​which may be modified depending on the purpose sought, if necessary.

[0023] For the purposes of the present invention, the term "keratin material" is intended to cover human skin. Facial skin is particularly considered according to the present invention.

[0024] In the present invention, all percentages refer, unless otherwise specified, to a percentage by weight.

[0025] The mask according to the present invention comprises:

[0026] i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and

[0027] ii) a composition impregnated into the occlusive substrate, wherein the composition comprises:

[0028] a) at least one surfactant chosen from polyglyceryl esters of fatty acids with HLB > 10 and

[0029] b) at least one C-glycoside. Occlusive substrate

[0030] For the purposes of the invention, the term "occlusive substrate" means that the substrate can function by forming a protective layer on the surface of the skin and creating a barrier to prevent loss of hydration.

[0031] The occlusive substrate has a water vapor transmission rate (MVTR) of 0.01 to 10 g / m2 / 24 h, preferably 0.1 to 5 g / m2 / 24 h, more preferably 0.1 to 3 g / m2 / 24 h, even more preferably 0.2 to 1 g / m2 / 24 h.

[0032] In some embodiments, the occlusive substrate has a water vapor transmission rate (MVTR) of 0.25 to 0.48 g / m2 / 24 h.

[0033] The water vapor transmission rate may be tested in accordance with ASTM F1249-20.

[0034] In particular, the water vapor transmission rate can be tested as follows: a dry chamber is separated from a humid chamber of a known temperature of 38+0.5°C and a humidity of 100% by the material layer to be tested. The dry chamber and the humid chamber constitute a diffusion cell in which the material layer is sealed. The water vapor diffused through the material layer mixes with the gas in the dry chamber and is transported to a pressure modulated infrared sensor. The sensor can transfer the electronic signal into the water vapor concentration. The diffusion will last for 24 hours. Then, the water vapor concentration is divided by the surface area of ​​the diffusion chamber to obtain the MVTR (g / cm2 / 24 h).

[0035] Preferably, the occlusive substrate comprises:

[0036] a) a layer of non-water transmission film and

[0037] b) a layer of non-woven fabric.

[0038] As used herein, a non-water-transmitting film layer means a film layer that is impermeable to water at a pressure of 1 Mpa.

[0039] Preferably, the water-repellent film layer is made of a material selected from polyethylene (PE), polyethylene terephthalate (PET), polyamide (PA), aluminum foil, aluminum oxide, silicone and mixtures thereof.

[0040] Preferably, the nonwoven fabric layer is made of fibers selected from synthetic polymer fibers, semi-natural fibers, natural fibers and mixtures thereof.

[0041] Examples of synthetic polymer fibers include polyester fibers, polyethylene terephthalate fibers, polyethylene fibers, and polypropylene fibers.

[0042] As an example of semi-natural fibers, viscose rayon fibers may be mentioned.

[0043] Examples of natural fibers include cotton, pulp, bamboo, and cellulose fibers.

[0044] The occlusive substrate can be prepared by laminating the water-repellent film layer and the non-woven fabric layer.

[0045] One skilled in the art can determine the thicknesses of the water-repellent film layer and the nonwoven fabric layer depending on the intended use.

[0046] The occlusive substrate may have a variety of shapes, depending on the desired use and the characteristic of the mask.

[0047] The occlusive substrate is generally designed to fit the area of ​​the skin to which topical application is desired. For example, when the mask is applied to the face, the substrate is designed to match the shape of the face, avoiding, if necessary, the areas of the eyes, nostrils and mouth.

[0048] The occlusive substrate suitable for the mask according to the present invention is commercially available. Examples of commercial products that can be used as an occlusive substrate include those marketed under the trade names NR92050-(Rayon 55% / Pulp 41% / PE 4%)5 pm and NR92040 AL by the company Sanwa.

[0049] A person skilled in the art can choose a suitable substrate and the weight ratio between the substrate used and the composition according to the present invention is based on the nature of the composition. Polyglyceryl esters of fatty acids

[0050] The composition according to the present invention comprises at least one surfactant chosen from polyglyceryl esters of fatty acids having an HLB >10.

[0051] The term HLB (hydrophilic-lipophilic balance) is well known to those skilled in the art and reflects the ratio between the hydrophilic part and the lipophilic part in the molecule.

[0052] For the purposes of the present invention, it is preferable that the polyglyceryl fatty acid ester has a polyglycerol moiety derived from 2 to 10 glycerols, more preferably from 3 to 6 glycerols, and even more preferably from 5 to 6 glycerols.

[0053] The polyglyceryl ester of fatty acid may be chosen from mono, di and triesters of saturated or unsaturated acid, preferably of saturated acid, including 2 to 30 carbon atoms, preferably 6 to 30 carbon atoms and, more preferably, 8 to 30 carbon atoms, such as capric acid, caprylic acid, lauric acid, myristic acid, stearic acid, isostearic acid and oleic acid.

[0054] The polyglyceryl fatty acid ester may be selected from the group consisting of:

[0055] PG5 caprylate, PG5 caprate, PG5 dicaprate, PG5 tricaprate, PG5 laurate PG5, PG5 myristate, PG5 dimyristate, PG5 stearate, PG5 isostearate, PG5 dü-sostearate, PG5 oleate, PG5 dioleate.

[0056] PG6 caprylate, PG6 dicaprylate, PG6 caprate, PG6 dicaprate, PG6 laurate, PG6 myristate, PG6 dimyristate, PG6 stearate, PG6 isostearate, PG6 oleate, PG6 dioleate,

[0057] PG10 caprylate, PG10 dicaprylate, PG10 tricaprylate, PG10 caprate, PG 10 dicaprate, PG 10 tricaprate, PG 10 laurate, PG 10 dilaurate, PG10 myristate, PG10 dimyristate, PG10 stearate, PG10 distearate, PG10 isostearate, PG10 diisostearate, PG10 oleate

[0058] It is preferable to choose the polyglyceryl ester of fatty acid from:

[0059] - polyglyceryl monocaprylates comprising 3 to 6 glycerol units,

[0060] - polyglyceryl monolaurates comprising 3 to 6 glycerol units,

[0061] - polyglyceryl mono(iso)stearates comprising 3 to 6 glycerol units,

[0062] - polyglyceryl monooleates comprising 3 to 6 glycerol units,

[0063] - polyglyceryl dioleates comprising 3 to 6 glycerol units, and

[0064] - polyglyceryl monocaprates comprising 3 to 6 glycerol units,

[0065] and mixtures thereof.

[0066] Better still, the polyglyceryl fatty acid ester is selected from polyglyceryl monocaprylates comprising 3 to 6 glycerol units, polyglyceryl monolaurates comprising 3 to 6 glycerol units, polyglyceryl monocaprates comprising 3 to 6 glycerol units and mixtures thereof.

[0067] Even better, the surfactant chosen from polyglyceryl esters of fatty acids with HLB > 10 is polyglyceryl-6 caprylate.

[0068] Advantageously, the surfactant selected from polyglyceryl esters of fatty acids with HLB >10 is present in the composition according to the present invention. in an amount ranging from 0.5% by weight to 15% by weight, preferably from 2% by weight to 12% by weight and, more preferably, from 3% by weight to 10% by weight, relative to the total weight of the composition. C-glycosides

[0069] According to the first aspect, the composition of the present invention comprises at least one C-glycoside.

[0070] Preferably, the C-glycoside is chosen from the compounds of formula (I): X—R (I) ST, v?

[0071] where:

[0072] - R represents a saturated C 1 to C 10 alkyl radical, in particular C 1 to C 4 which can optionally be replaced by at least one radical chosen from OH, COOH or COOR" 2R"2 being a saturated CrC4 alkyl radical

[0073] - S represents a monosaccharide or a polysaccharide comprising up to 20 sugar units, in particular up to 6 sugar units, in the form of pyranose and / or furanose and of the L and / or D series, said monosaccharide or polysaccharide possibly being substituted by a hydroxyl group which is necessarily free and optionally one or more protected amine functional groups, and

[0074] - X represents a radical chosen from the groups -CO-, -CH(OH)-, -CH(NH2)-, - CH(NHCH2CH2CH2OH)-, -CH(NHPh)- and -CH(CH3)- and in particular a radical -CO-, -CH(OH)- or -CH(NH2)- and more particularly a radical -CH(OH)-,

[0075] the S-CH2-X bond represents a bond of C-anomeric nature, which can be α or [3,

[0076] as well as their physiologically acceptable salts, their solvates, such as hydrates and their optical and geometric isomers.

[0077] The C-glycosides used for implementing the invention are in particular those for which R denotes a saturated linear alkyl radical of C1 to C6, in particular C1 to C4, preferably C1 to C2 and more preferentially, a methyl radical.

[0078] Among the alkyl groups suitable for implementing the invention, mention may in particular be made of methyl, ethyl, isopropyl, n-propyl, n-butyl, t-butyl, isobutyl, sec-butyl, pentyl, n-hexyl, cyclopropyl, cyclopentyl or cyclohexyl groups.

[0079] According to one embodiment of the invention, it is possible to use a C-glycoside corresponding to formula (I) for which S can represent a monosaccharide or a polysaccharide comprising up to 6 sugar units, in the form of pyranose and / or furanose and of L and / or D series, said monosaccharide or polysaccharide having at least one free hydroxyl functional group and / or optionally one or more necessarily protected amine functional groups, X and R furthermore retaining all of the above definitions.

[0080] Advantageously, a monosaccharide of the invention may be chosen from the following elements: D-glucose, D-galactose, D-mannose, D-xylose, D-lyxose or L-fucose, L-arabinose, L-rhamnose, D-glucuronic acid, D-galacturonic acid, D-iduronic acid, N-acetyl-D-glucosamine or N-acetyl-D-galactosamine and advantageously designates the following elements: D-glucose, D-xylose, N-acetyl-D-glucosamine or L-fucose and in particular D-xylose.

[0081] More particularly, a polysaccharide of the invention comprising up to 6 sugar units may be chosen from D-maltose, D-lactose, D-cellobiose, D-maltotriose, a disaccharide combining a uronic acid chosen from D-iduronic acid or D-glucuronic acid with a hexosamine chosen from D-galactosamine, D-glucosamine, N-acetyl-D-galactosamine or N-acetyl-D-glucosamine, an oligosaccharide comprising at least one xylose which may advantageously be chosen from xylobiose, methyl-[3-xylobioside, xylotriose, xylotetraose, xylopentaose and xylohexaose, and in particular xylobiose, which is composed of two xylose molecules linked via a 1-4 bond.

[0082] More particularly, S may represent a monosaccharide chosen from D-glucose, D-xylose, L-fucose, D-galactose or D-maltose and in particular D-xylose.

[0083] Preferably, a C-glycoside of formula (I) is used for which:

[0084] - R denotes an unsubstituted linear alkyl radical, Cr C4, in particular a Cr-C2 alkyl radical, in particular a methyl radical;

[0085] - S represents a monosaccharide as described above and selected in particular among D-glucose, D-xylose, N-acetyl-D-glucosamine or L-fucose, and in particular D-xylose;

[0086] - X represents a group selected from a group -CO-, -CH(OH)- or -CH(NH2 )- and, preferably, a -CH(OH)- group.

[0087] Acceptable salts of the compounds described in the present invention include conventional non-toxic salts of said compounds, such as those formed from organic or inorganic acids. Examples that may be mentioned are salts of inorganic acids such as sulfuric acid, hydrochloric acid. Also that may be mentioned are salts of organic acids, which may comprise one or more carboxylic, sulfonic or phosphonic acid groups. Also that may be mentioned are propionic acid, acetic acid, terephthalic acid, citric acid and tartaric acid.

[0088] When the compound of formula (I) comprises an acid group, the neutralization of the acid group(s) may be carried out with an inorganic base, such as LiOH, NaOH, KOH, Ca(OH)2, NH4OH, Mg(OH)2 or Zn(OH)2, or with an organic base, such as a primary, secondary or tertiary alkylamine, for example triethylamine or butylamine. This primary, secondary or tertiary alkylamine may comprise one or more nitrogen and / or oxygen atoms and may therefore comprise, for example, one or more alcohol functional groups; mention may in particular be made of 2-amino-2-methylpropanol, triethanolamine, 2-(dimethylamino)propanol or 2-amino-2-(hydroxymethyl)-1,3-propanediol. Mention may also be made of lysine or 3-(dimethylamino)propylamine.

[0089] Solvates that are acceptable for the compounds described in the present invention include conventional solvates, such as those formed during the final stage of preparation of said compounds due to the presence of solvents. Mention may be made, by way of example, of solvates due to the presence of water or linear or branched alcohols, such as ethanol or isopropanol.

[0090] Of course, according to the invention, a C-glycoside corresponding to formula (I) can be used alone or in a mixture with other C-glycosides and in any proportion.

[0091] A C-glycoside which is suitable for the invention can in particular be obtained by the synthesis method described in document WO 02 / 051828.

[0092] In particular, by way of non-limiting illustration of the C-glycoside compounds which are particularly suitable for the invention, the following compounds may be mentioned:

[0093] - C-[3-D-xylopyranoside-n-propane-2-one,

[0094] - CaD-xylopyranoside-n-propane-2-one,

[0095] - C-[3-D-xylopyranoside-2-hydroxypropane,

[0096] - Ca-D-xylopyranoside-2-hydroxypropane,

[0097] - l-(C-[3-D-fucopyranoside)propane-2-one,

[0098] - l-(CaD-fucopyranoside)propane-2-one,

[0099] - l-(C-[3-L-fucopyranoside)propane-2-one,

[0100] - l-(C-a-L-fucopyranoside)propane-2-one,

[0101] - l-(C-[3-D-fucopyranoside)-2-hydroxypropane,

[0102] - l-(C-a-D-fucopyranoside)-2-hydroxypropane,

[0103] - l-(C-[3-L-fucopyranoside)-2-hydroxypropane,

[0104] - l-(C-a-L-fucopyranoside)-2-hydroxypropane,

[0105] - l-(C-[3-D-glucopyranosyl)-2-hydroxypropane,

[0106] - l-(C-a-D-glucopyranosyl)-2-hydroxypropane,

[0107] - l-(C-[3-D-galactopyranosyl)-2-hydroxypropane,

[0108] - l-(C-a-D-galactopyranosyl)-2-hydroxypropane,

[0109] - l-(C-[3-D-fucofuranosyl)propane-2-one,

[0110] - l-(C-a-D-fucofuranosyl)propane-2-one, [OUI] - l-(C-[3-L-fucofuranosyl)propane-2-one,

[0112] - l-(C-a-L-fucofuranosyl)propane-2-one,

[0113] - C-P-D-maltopyranoside-n-propane-2-one,

[0114] - C-a-D-maltopyranoside-n-propane-2-one,

[0115] - C-[3-D-maltopyranoside-2-hydroxypropane,

[0116] - CaD-maltopyranoside-2-hydroxypropane, their isomers and their mixtures.

[0117] According to one embodiment, C-[3-D-xylopyranoside-2-hydroxypropane or CaD-xylopyranoside-2-hydroxypropane and better still C-[3-D-xylopyranoside-2-hydroxypropane can advantageously be used for the preparation of a composition according to the invention.

[0118] According to a specific embodiment, the C-glycoside may be C-[3-D-xylopyranoside-2-hydroxypropane (or hydroxypropyl tetrahydropyrantriol) provided as a solution containing 70% by weight of active material in water and propylene glycol.

[0119] Advantageously, the C-glycoside is present in the composition in an amount ranging from 0.01 to 40% by weight, preferably from 0.05 to 25% by weight, and more preferably from 0.1% by weight to 15% by weight, relative to the total weight of the composition. Aqueous phase

[0120] The composition of the present invention may comprise an aqueous phase.

[0121] If present, the aqueous phase of the composition according to the present invention comprises water and optionally one or more organic solvents miscible in water or at least partially miscible in water chosen from monoalcohols containing from 2 to 6 carbon atoms such as ethoxydiglycol and polyols containing in particular from 2 to 20 carbon atoms.

[0122] The term "polyol" should be understood to mean any organic molecule comprising at least two free hydroxyl groups. Examples of polyols that may be mentioned include glycols, for example propanediol, butylene glycol, propylene glycol, pentylene glycol, isoprene glycol, caprylyl glycol, glycerin and polyethylene glycols.

[0123] Advantageously, the composition according to the invention comprises at least one organic solvent, preferably chosen from ethoxydiglycol, propanediol, glycerin and their combinations.

[0124] If present, the aqueous phase may represent from 40% by weight to 95% by weight, preferably from 70% by weight to 90% by weight, and better still from 80% by weight to 90% by weight, relative to the total weight of the composition. Additional cosmetic active ingredients

[0125] The composition of the present invention may comprise one or more cosmetic active ingredients for caring for keratin materials in addition to C-glycoside.

[0126] It is easy for a person skilled in the art to adjust the amount of the cosmetic active ingredient based on the end use of the composition according to the present invention. Additional adjuvants or additives

[0127] The composition according to the present invention may also comprise one or more additional adjuvants or additives commonly used in keratin fiber care compositions, for example, perfumes, surfactants, preservatives and bactericides, pH regulators and mixtures thereof.

[0128] The person skilled in the art can choose the amount of the additional adjuvants or additives so as not to negatively impact the end use of the composition according to the present invention.

[0129] The composition may comprise additional surfactants, for example, at least one co-surfactant selected from oxyethylenated sorbitan fatty acid esters, fatty acids with melting point <= 30°C, and combinations thereof. The co-surfactant may increase the solubility of the cosmetic active ingredients in the composition by reducing the interfacial tension to a lower limit than that of the surfactants.

[0130] For the purposes of the present invention, it is preferable that the oxyethylenated sorbitan fatty acid esters have a fatty acid containing 10 to 30 carbon atoms, more preferably 10 to 20 carbon atoms, and even more preferably 12 to 18 carbon atoms.

[0131] The oxyethylenated sorbitan fatty acid esters may be selected from mono-, di- and triesters of saturated or unsaturated fatty acids, including 10 to 30 carbon atoms, preferably 10 to 20 carbon atoms and, more preferably, 12 to 18 carbon atoms, such as lauric acid, myristic acid, stearic acid, isostearic acid and oleic acid.

[0132] Examples of oxyethylenated sorbitan fatty acid esters that may be used according to the invention include polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 65, polysorbate 80, polysorbate 85, PEG-5 sorbitan isostearate, PEG-20 sorbitan triisostearate, PEG-20 sorbitan isostearate, PEG-40 sorbitan septaoleate, PEG-20 sorbitan tetraoleate, and PEG-20 sorbitan trioleate; preferably the oxyethylenated sorbitan fatty acid esters are polysorbate 20, marketed as TWEEN 20® by Croda, or polysorbate 60, marketed as TWEEN 60® by Croda, polysorbate 80, marketed as TWEEN™ 80-LQ-(CQ) by Croda.

[0133] For the purposes of the present invention, it is preferable that the fatty acid with a melting point <=30 °C can be used according to the invention, mention may be made of oleic acid, linoleic acid, arachidonic acid and their mixtures; preferably, the fatty acid with melting point <=30 °C is oleic acid, marketed under the name EDENOR OL 75 MY (RSPO MB) by EMERY OLEOCHEMICALS.

[0134] If it is present, advantageously, the at least one co-surfactant chosen from oxyethylenated sorbitan and fatty acid esters, fatty acids with a melting point <=30°C, and combinations thereof is present in the composition according to the present invention in an amount ranging from 1% by weight to 20% by weight, preferably from 3% by weight to 15% by weight, better still from 3% by weight to 10% by weight, relative to the total weight of the composition.

[0135] In some embodiments, the composition comprises from 1% to 10% by weight, preferably from 1% to 9% by weight, more preferably from 3% to 5% by weight of at least one oxyethylenated fatty acid ester of sorbitan, relative to the total weight of the composition.

[0136] Examples of oxyethylenated fatty acid esters of sorbitan include polysorbate 80 and polysorbate 60.

[0137] In certain embodiments, the composition comprises from 1% to 10% by weight, preferably from 1% to 9% by weight, more preferably from 3% by weight to 5% by weight of fatty acid with melting point <=30°C, relative to the total weight of the composition.

[0138] As examples of fatty acids with melting point <=30°C, oleic acid may be mentioned.

[0139] According to a second embodiment, the present invention provides a care mask for keratin materials, comprising:

[0140] i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and

[0141] ii) a composition impregnated in the occlusive substrate, said composition comprising, relative to the total weight of the composition:

[0142] a) from 3% by weight to 10% by weight of at least one surfactant chosen from polyglyceryl monocaprates comprising 3 to 6 glycerol units and

[0143] b) from 0.1% by weight to 15% by weight of at least one C-glycoside chosen from C-[3-D-xylopyranoside-2-hydroxypropane or CaD-xylopyranoside-2-hydroxypropane, and combinations thereof; Method and use

[0144] The mask according to the present invention is intended for topical application.

[0145] The mask according to the present invention can be used to effectively deliver the active ingredients it contains to keratin materials.

[0146] According to the second aspect, the present invention provides a non-therapeutic method for caring for keratin materials, comprising the application of the mask according to the present invention to the keratin materials.

[0147] In particular, keratin materials are facial skin. EXAMPLES

[0148] The following examples serve to illustrate the present invention without however being limiting in nature.

[0149] The main raw materials used, trade names and their supplier are listed in Table 1.

[0150] [Tables 1] INCI name Trade name Supplier Oleic acid EDENOR OL 75 MY (RSPO MB) EMERY OLEO-CHEMICALS Polysorbate 80 TWEEN™ 80-LQ-(CQ) CRODA Polyglyceryl-6 caprylate SUNSOFT® Q-8H-C TAIYO KAGAKU Cetearyl alcohol LANETTE® O OR BASF Polyglyceryl-5 laurate SUNSOFT® A-121E-C TAIYO KAGAKU Ceteareth-20 EMULGIN® B 2 BASF PEG-8 glyceryl isostearate UNIOX™ GM-8IS NOF Oleth-3 phosphate CRODAFOS® O3A-LQ-(MH) Croda

[0151] The main raw materials used, trade names and their supplier are listed in Table 2.

[0152] [Tables2] Composition Trade name Supplier 100% PET TT-70 Daiwa Non-woven 50 g / m2 (rayon / pulp / PE = 55% / 41% / 4%) / PE 5 microns NR92050-5um Sanwa Non-woven 40 g / m2 (rayon / pulp / PE = 55% / 41% / 4%) / PE 12 microns / AL 7 microns / PE 10 microns NR92040 AL Sanwa

[0153] Invention Examples 1 to 4 and Comparative Examples 1 to 4

[0154] The compositions according to inventive examples (EI) 1-4 and comparative examples (CE) 1-4 were prepared with the ingredients listed in Table 3 (the contents were expressed as percentages by weight of ingredients relative to the total weight of each composition, unless otherwise indicated):

[0155] The compositions were prepared as follows, taking as an example the composition of inventive example 1:

[0156] 1. by adding hydroxypropyl tetrahydropyrantriol into water, mixing gently until dissolved to obtain an aqueous phase.

[0157] 2. by heating the aqueous phase to 65°C, adding the other ingredients in the hot aqueous phase.

[0158] 3. by homogenizing with a speed >1000rpm for 5 minutes.

[0159] 4. stirring at 150 rpm until the temperature is cooled to room temperature ambient to obtain the composition.

[0160] Then, the obtained compositions were impregnated into an occlusive substrate as indicated in Table 3 at a rate of 70-80 mg / cm2.

[0161] [Tables3] Components El. 1 El. 2 EI.3 EL 4 EC. 1 EC. 2 CE. 3 EC. 4 Hydroxypropyl tetrahydropyrantriol 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.15 Polyglyceryl-6 caprylate 5 5 3 10 5 5 - - Polysorbate 80 5 5 10 - 5 5 13 - Oleic acid 3 3 - 3 3 3 - - PEG-8 glyceryl isostearate - - - - - - - 3 Oleth-3 phosphate - - - - - - - 1 Glycerin 5 5 5 5 5 5 5 5 Ethoxydiglyco 1 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Propanediol 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Water QS100 QS100 QS100 QS100 QS10 0 QS10 0 QS100 QS100 Substrate NR92050_ 5um NR920 40 AL NR920 40 AL NR920 40 AL TT-7 0 TT-7 0 NR920 40 AL NR920 40 AL Water vapor transmission rate (MVTR) of the substrate (g / m2 / 24 h) 0.25 0.48 0.48 0.48 300 300 0.48 0.48 Application time 20 20 20 20 20 60 20 20 (min)

[0162] Evaluation of the diffusion effect of the different masks

[0163] The diffusion effect of the different masks was evaluated by a fluorescence intensity test as follows. Preparation of the formula:

[0164] Fluorescein dye (chemical name: 3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-l-one) was mixed into the test mask composition at a concentration of 50 ppm in advance to obtain the test sample, which was stored at room temperature in a dark room. Ex vivo skin preparation:

[0165] The pig ear was taken out from -20^C and cleaned with water. A pig skin was cut from one ear using a surgical blade. The pig skin was placed on a damp cloth to maintain humidification. The hair on the surface of the pig skin was cut.

[0166] Pigskin on a damp cloth was kept at 4^C overnight.

[0167] The masks to be tested were applied to pig skin for 20 to 60 minutes according to the test requirements shown in Table 3.

[0168] The formula residue was wiped off with dry tissues, and then the laboratory containers containing the pigskin were transferred to an oven at 32^C for 2 hours.

[0169] A 10 mm x 10 mm piece was cut from this pig skin and then frozen with optical coherence tomography (average) at -80^C.

[0170] The cryosection skin samples were cut into 14 μm by a Cryostat CM3050 S machine. Then, images were taken under a confocal microscope.

[0171] A Nikon AIR MP microscope was used for this test. A confocal microscope was used to observe the fluorescein dye signal. From 500 nm to 550 nm emission wavelength, the fluorescein dye signal was captured.

[0172] The fluorescein intensity result is presented by pixels.

[0173] The masks will be considered to effectively deliver the active ingredient they contain to the keratin materials when the fluorescence intensity is greater than 4000 pixels. The higher the pixel data, the greater the penetration of the water-soluble active hydroxypropyl tetrahydropyrantriol.

[0174] The fluorescence intensity delivered by the masks of the inventive examples (IE) 1-4 and the comparative examples (CE) 1-4 have been summarized in Table 4 below.

[0175] [Tables4] ELI El. 2 EI.3 EI.4 EC.l EC. 2 EC.3 CE.4 Fluorescence intensity (pixel) 5800 5000 4500 4800 1500 3400 2100 3100

[0176] It can be seen from Table 4 that the mask according to the present invention can effectively deliver the active ingredient it contains to the keratin materials within 30 minutes.

[0177] It can also be seen that the occlusive substrate with a specific range of water vapor transmission rate and the surfactant selected from poly-glyceryl fatty acid esters with HLB > 10 result in a synergistic efficacy on the penetration of the active ingredient contained in the mask onto keratin materials.

Claims

Claims

1. A mask for caring for keratin materials, comprising: i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and ii) a composition impregnated in the occlusive substrate, wherein the composition comprises: a) at least one surfactant chosen from polyglyceryl esters of fatty acids with HLB > 10 and b) at least one C-glycoside.

2. Mask according to claim 1, the surfactant being chosen from: - polyglyceryl monocaprylates comprising 3 to 6 glycerol units, - polyglyceryl monolaurate comprising 3 to 6 glycerol units, - polyglyceryl mono(iso)stearate comprising 3 to 6 glycerol units, - polyglyceryl monooleate comprising 3 to 6 glycerol units, - polyglyceryl dioleate comprising 3 to 6 glycerol units, and - polyglyceryl monocaprate comprising 3 to 6 glycerol units; and - mixtures thereof, preferably the polyglyceryl fatty acid ester is chosen from polyglyceryl monocaprylates comprising 3 to 6 glycerol units, polyglyceryl monolaurates comprising 3 to 6 glycerol units, polyglyceryl monocaprates comprising 3 to 6 glycerol units, and mixtures thereof, preferably the polyglyceryl fatty acid ester is polyglyceryl-6 caprylate.

3. The mask according to claim 1 or 2 wherein the surfactant is present in an amount ranging from 0.5% by weight to 15% by weight, preferably from 2% by weight to 12% by weight, more preferably from 3% by weight to 10% by weight, relative to the total weight of the composition.

4. The mask according to any one of claims 1 to 3, the C-glycoside being selected from the compound of formula (I): X—R (I) S—' (D where: - R represents a saturated C 1 to C 10 alkyl radical, in particular C 1 to C 4 which can optionally be replaced by at least one radical chosen from OH, COOH or COOR" 2R"2 being a saturated C 1 - alkyl radical C4, - S represents a monosaccharide or a polysaccharide comprising up to 20 sugar units, in particular up to 6 sugar units, in the form of pyranose and / or furanose and of the L and / or D series, said monosaccharide or polysaccharide possibly being substituted by a hydroxyl group which is necessarily free and optionally one or more protected amine functional groups, and - X represents a radical chosen from the groups -CO-, -CH(OH)-, -CH(NH2)-, -CH(NHCH2CH2CH2OH)-, -CH(NHPh)- and -CH(CH3)- and in particular a radical -CO-, -CH(OH)- or -CH(NH2)- and more particularly a radical -CH(OH)-, the S-CH2-X bond represents a C-anomeric bond, which can be a or [3, as well as their physiologically acceptable salts, their solvates, such as hydrates and their optical and geometric isomers.

5. Mask according to any one of claims 1 to 4, the C-glycoside being selected from - C-[3-D-xylopyranoside-n-propane-2-one, - CaD-xylopyranoside-n-propane-2-one, - C-[3-D-xylopyranoside-2-hydroxypropane, - Ca-D-xylopyranoside-2-hydroxypropane, - l-(C-[3-D-fucopyranoside)propane-2-one, - l-(CaD-fucopyranoside)propan-2-one, - l-(C-[3-L-fucopyranoside)propane-2-one, - l-(CaL-fucopyranoside)propane-2-one, - l-(C-[3-D-fucopyranoside)-2-hydroxypropane, - l-(CaD-fucopyranoside)-2-hydroxypropane, - l-(C-[3-L-fucopyranoside)-2-hydroxypropane, - l-(CaL-fucopyranoside)-2-hydroxypropane, - l-(C-[3-D-glucopyranosyl)-2-hydroxypropane, - l-(CaD-glucopyranosyl)-2-hydroxypropane, - l-(C-[3-D-galactopyranosyl)-2-hydroxypropane, - l-(CaD-galactopyranosyl)-2-hydroxypropane, - l-(C-[3-D-fucofuranosyl)propane-2-one, - l-(CaD-fucofuranosyl)propane-2-one, - l-(C-[3-L-fucofuranosyl)propane-2-one, - l-(CaL-fucofuranosyl)propane-2-one, - C-[3-D-maltopyranoside-n-propane-2-one, - CaD-maltopyranoside-n-propan-2-one, - C-[3-D-maltopyranoside-2-hydroxypropane, - CaD-maltopyranoside-2-hydroxypropane, their isomers and their mixtures.

6. The mask according to any one of claims 1 to 5 further comprises an aqueous phase.

7. Mask according to claim 6, the aqueous phase comprising water and organic solvents miscible in water or at least partially miscible in water chosen from monoalcohols containing from 2 to 6 carbon atoms and polyols containing in particular from 2 to 20 carbon atoms; preferably, the organic solvent is chosen from ethoxydiglycol, propanediol, glycerin and combinations thereof.

8. The mask according to any one of claims 1 to 7 further comprises at least one co-surfactant chosen from oxyethylenated fatty acid esters of sorbitan, fatty acids with a melting point < 30°C and combinations thereof.

9. A mask according to claim 1, comprising: i) an occlusive substrate with a water vapor transmission rate of 0.01 to 10 g / m2 / 24h and ii) a composition impregnated in the occlusive substrate, said composition comprising, relative to the total weight of the composition: a) from 3% by weight to 10% by weight of at least one surfactant chosen from polyglyceryl monocaprates comprising 3 to 6 glycerol units and b) from 0.1% by weight to 15% by weight of at least one C-glycoside chosen from C-[3-D-xylopyranoside-2-hydroxypropane or CaD-xylopyranoside-2-hydroxypropane, and combinations thereof;

10. Non-therapeutic method for the care of keratin materials, comprising the application of the mask according to any one of claims 1 to 9 to the keratin materials.