CARE COMPOSITION FOR KERATINOUS MATERIALS AND MASK COMPRISING SAME

Abstract

COMPOSITION FOR CARE OF KERATINOUS MATERIALS AND MASK COMPRISING SAME The present invention relates to a composition, preferably for care of keratinous materials, comprising: (i) at least one non-ionic polysaccharide chosen from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and a combination thereof; (ii) at least one ionic polysaccharide chosen from xanthan gum, carrageenan, gellan gum and a combination thereof;and (iii) at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by the following chemical formula (I), and a combination thereof, (I) wherein R5, R6 and R7, each independently, represent a hydrogen atom, a hydroxyl group, a C1-C6 alkyl group or a C1-C6 alkoxy group, provided that at least one of R5, R6 and R7 represents a hydroxyl group, and R represents a C1-C6 alkyl group or an aryl group, wherein the weight ratio of the at least one non-ionic polysaccharide to the at least one ionic polysaccharide is at least 1:5. The present invention also relates to a mask comprising said composition and to a non-therapeutic process for caring for keratinous materials. Figure for abstract: none;

Description

Title of the invention: COMPOSITION FOR CARE OF KERATINOUS MATERIALS AND MASK COMPRISING SAME Technical field

[0001] The present invention relates to a composition and a mask containing the same. In particular, the present invention relates to a composition for caring for keratinous materials, and a mask comprising the same. The present invention also relates to a non-therapeutic process for caring for keratinous materials. STATE OF THE ART

[0002] In the cosmetic industry, laminated nonwoven is widely used in sheet mask products to ensure good occlusion.

[0003] The most common occlusive films for sheet mask products are made of polyethylene (PE), polypropylene (PP), polyurethane (PU) or aluminate sheet. For greater environmental friendliness, natural saccharide mask film becomes a solution to consider. On the market, the most well-known natural polymer film is cellulose film, but it is very rigid and cannot be laminated to non-woven fabric without chemical adhesion.

[0004] Natural solid hydrogel made from different kinds of polysaccharides is widely used as mask sheet, it is able to be coated on the non-woven fabric by thermal compression without any chemical adhesion.

[0005] Surface stickiness is the challenge to use solid hydrogel as laminating material. Since solid hydrogel is normally made from different polysaccharides containing high level of hydroxyl, which will cause stickiness on the surface of hydrogel. Therefore, the laminated film is not easy to unfold as mask fabric.

[0006] Therefore, it is desirable to reduce the stickiness of the hydrogel surface. Summary of the invention

[0007] An object of the present invention is to provide a solution for reducing the stickiness of the hydrogel surface intended for mask products.

[0008] Another object of the present invention is to provide a non-therapeutic process for caring for keratinous materials.

[0009] Thus, according to a first aspect, the present invention provides a composition, preferably for caring for keratinous materials, comprising:

[0010] (i) at least one non-ionic polysaccharide chosen from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and of galactose, and a combination thereof;

[0011] (ii) at least one ionic polysaccharide selected from xanthan gum, carrageenan, gellan gum and a combination thereof; and

[0012] (iii) at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by the following chemical formula (I), and a combination thereof,

[0013] in which

[0014] R5, R6 and R7, each independently, represent a hydrogen atom, a group hydroxyl, a C1-C6 alkyl group or a C1-C6 alkoxy group, provided that at least one of R5, R6 and R7 represents a hydroxyl group, and

[0015] R represents a C1-C6 alkyl group or an aryl group,

[0016] wherein the weight ratio between the at least one non-ionic polysaccharide and the at least one ionic polysaccharide is at least 1:5.

[0017] The surface of the hydrogel formed from the composition according to the present invention is not sticky.

[0018] The composition according to the present invention is suitable for a mask, in particular for care masks for keratinous materials.

[0019] According to a second aspect, the present invention provides a mask, preferably for caring for keratinous materials, comprising:

[0020] A) a water-insoluble mask fabric, and

[0021] B) the composition according to the first aspect of the present invention on the water-insoluble mask fabric.

[0022] The composition and the mask according to the present invention can be used for the care of keratinous materials.

[0023] According to a third aspect, the present invention also provides a non-therapeutic process for caring for keratinous materials, comprising the application of the mask according to the present invention to the keratinous materials.

[0024] 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

[0025] 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...".

[0026] As used herein, the term "comprising" shall be interpreted to encompass all specifically cited features as well as optional, additional, unspecified features.

[0027] As used herein, the use of the term "comprising" also discloses the embodiment in which no features other than the specifically recited features are present (i.e., "consisting of").

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as that commonly recognized 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 recognized by those skilled in the art to which the present invention pertains, the definition described herein shall apply.

[0029] 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". 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.

[0030] As used herein, the term "at least one" as used in this description is equivalent to the term "one or more".

[0031] 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.

[0032] The composition according to the present invention comprises

[0033] (i) at least one non-ionic polysaccharide chosen from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and a combination thereof;

[0034] (ii) at least one ionic polysaccharide selected from xanthan gum, carrageenan, gellan gum and a combination thereof; and

[0035] (iii) at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by the chemical formula (I) cited above, and a combination thereof,

[0036] wherein the weight ratio between the at least one non-ionic polysaccharide and the at least one ionic polysaccharide is at least 1:5. Non-ionic polysaccharides

[0037] According to the first aspect, the composition of the present invention comprises at least a non-ionic polysaccharide selected from mannose homopolymers, mannose and glucose copolymers, mannose and galactose copolymers, and a combination thereof.

[0038] Preferably, homopolymers indicate polymers with a polymer degree between 2 and 6.

[0039] Preferably, the copolymers indicate polymers with a number average molecular weight of 10,000 to 2,000,000 g / mol, preferably 20,000 to 1,000,000 g / mol, more preferably 50,000 to 500,000 g / mol.

[0040] Preferably, the non-ionic polysaccharide is selected from mannan, glucomannan, galactomannan, and a combination thereof.

[0041] 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.

[0042] Thus, preferably, 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.

[0043] More preferably, the non-ionic polysaccharide is chosen from glucomannan, konjac gum, Bletilla striata gum and a combination thereof.

[0044] 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.

[0045] Advantageously, the non-ionic polysaccharide is present in the composition of the present invention in an amount ranging from 0.03% by weight to 10% by weight, preferably from 0.04% by weight to 5% by weight, more preferably from 0.05% by weight to 1.4% by weight, even more preferably from 0.1% by weight to 1.3% by weight, most preferably from 0.15% by weight to 1.2% by weight, relative to the total weight of the composition. Ionic polysaccharides

[0046] According to the first aspect, the composition of the present invention comprises at least one ionic monosaccharide selected from xanthan gum, carrageenan, gellan gum, and a combination thereof.

[0047] 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 an aD-mannose, an acid [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 bound 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 Ca 2+ ions (Satia company, 1986). The neutralized form can be converted to the acid form by ion exchange or by dialysis of an acid solution.

[0048] The carrageenans that can be used can be chosen in particular from carrageenans of type q, K, v, t, X, y and and their mixtures in all proportions.

[0049] The carrageenans of the present invention may 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. Mention may also be made of lysine or 3-(dimethylamino)propylamine. These sulfated polysaccharides may also comprise a mixture of counterions among those defined above in a non-limiting manner.

[0050] Gellan gum has a recurring tetrasaccharide structure composed of (glucose-glucuronic acid-glucose-rhamose) units.

[0051] The partial structure of gellan gum is as follows:

[0052] -4)-L-Rhap-(al-3)-D-Glcp-([3-l-4)-D-GlcpA-([3-l-4)-D-Glcp-([3-l-,

[0053] Preferably, the composition according to the present invention comprises xanthan gum.

[0054] 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.

[0055] Advantageously, the ionic polysaccharide is present in the composition of the present invention in an amount ranging from 0.03% by weight to 10% by weight, preferably from 0.04% by weight to 5% by weight, more preferably from 0.05% by weight to 1.4% by weight, even more preferably from 0.1% by weight to 1.3% by weight, most preferably from 0.15% by weight to 1.2% by weight, relative to the total weight of the composition.

[0056] Preferably, the total amount of the non-ionic polysaccharide and the polysaccharide ionic in the composition of the present invention is from 0.1 wt% to 15 wt%, preferably from 0.3 wt% to 10 wt%, more preferably from 0.5 wt% to 2.5 wt%, even more preferably from 0.6 wt% to 2.0 wt%, most preferably from 0.8 wt% to 1.5 wt%, relative to the total weight of the composition.

[0057] Preferably, the weight ratio between the non-ionic polysaccharide and the ionic polysaccharide in the composition of the present invention is from 1:4 to 10:1, more preferably from 1:3 to 8:1, more preferably from 1:3 to 5:1, even more preferably from 1:3 to 4:1. Conservatives

[0058] According to the first aspect, the composition of the present invention comprises at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by the following chemical formula (I) and a combination thereof, R?

[0059] in which

[0060] R5, R6 and R7, each independently, represent a hydrogen atom, a group hydroxyl, a C1-C6 alkyl group or a C1-C6 alkoxy group, provided that at least one of R5, R6 and R7 represents a hydroxyl group, and

[0061] R represents a C1-C6 alkyl group or an aryl group.

[0062] As the C1-C6 alkyl group, examples include a methyl group, an ethyl group, and a propyl group; a methyl group being preferable.

[0063] As the C1-C6 alkoxy group, examples include a methoxy group, an ethoxy group, and a propoxy group; a methoxy group is preferable.

[0064] As the aryl group, for example, a phenyl group, a substituted phenyl group, a naphthyl group and a substituted naphthyl group may be mentioned; a phenyl group being preferable. As the substituent(s), a hydroxyl group and a C1-C6 alkyl group such as a methyl group may be mentioned.

[0065] It is preferable that R in the chemical formula (I) above represents a methyl group, an ethyl group or a phenyl group, preferably a methyl group or a phenyl group, and more preferably a methyl group.

[0066] As an aromatic ketone compound, mention may be made, for example, of

[0067] 2-hydroxyacetophenone,

[0068] 3-hydroxyacetophenone,

[0069] 4-hydroxyacetophenone,

[0070] 2,5-dihydroxyacetophenone,

[0071] 2,6-dihydroxy acetophenone,

[0072] 4-hydroxy-3-methoxyacetophenone,

[0073] 3,4,5-trihydroxy acetophenone,

[0074] 2',2'-dihydroxybenzophenone

[0075] 2-hydroxybenzophenone,

[0076] 2,2',4,4'-tetrahydroxybenzophenone, and

[0077] 3,4,2',4',6'-pentahydroxybenzophenone.

[0078] It is preferable that the aromatic ketone compound is hydroxyacetophenone, more preferably monohydroxyacetophenone, and even more preferably 4-hydroxyacetophenone.

[0079] Preferred examples of chlorophenyl glyceryl ether include chlorphenesin and its derivatives.

[0080] Chlorphenesin is 3-(4-chlorophenoxy)propane-1,2-diol and has the following structure:

[0081] Thus, more preferably, the preservative is chosen from chlorphenesin and its derivatives, hydroxyacetophenone, and a combination thereof, preferably the preservative is chosen from chlorphenesin, 4-hydroxyacetophenone, and a combination thereof.

[0082] Advantageously, the preservative is present in the composition of the present invention in an amount ranging from 0.02% by weight to 10% by weight, preferably from 0.05% by weight to 5% by weight, more preferably from 0.1% by weight to 1.0% by weight, even more preferably from 0.2% by weight to 0.8% by weight, most preferably from 0.25% by weight to 0.6% by weight, relative to the total weight of the composition. Aqueous phase

[0083] Preferably, the composition of the present invention comprises an aqueous phase.

[0084] Said aqueous phase comprises water.

[0085] 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.

[0086] Optionally, the aqueous phase comprises a water-miscible organic solvent (at room temperature to 25°C) chosen from ethanol, glycols 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, such as glycerin, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, caprylyl glycol, dipropylene glycol, diethylene glycol; and mixtures thereof.

[0087] Preferably, the water-miscible organic solvent, in particular glycerin, is present in the composition of the present invention in an amount ranging from 0.5% by weight to 20% by weight, preferably from 1% by weight to 10% by weight, relative to the total weight of the composition.

[0088] 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.

[0089] Preferably, the composition according to the present invention is oil-free.

[0090] As used herein, "oil-free" indicates that the amount of oil in the composition position of the present invention is less than 2% by weight, relative to the total weight of the composition.

[0091] Preferably, the amount of oil in the composition of the present invention is less than 1% by weight, relative to the total weight of the composition.

[0092] More preferably, the amount of oil in the composition of the present invention is less than 0.5% by weight, relative to the total weight of the composition.

[0093] Even more preferably, the composition according to the present invention does not even comprise oil. Cosmetic active ingredients

[0094] Depending on the final purpose, the composition according to the present invention may comprise one or more cosmetic active ingredients.

[0095] 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

[0096] The composition of the present invention may comprise additional conventional cosmetic adjuvants or additives, for example, perfumes, chelating agents, pH adjusting agents, and mixtures thereof.

[0097] A person skilled in the art can choose the amount of additional adjuvants or additives so that it does not have a negative impact on the final use of the composition according to the present invention.

[0098] Preferably, the composition according to the present invention comprises salicylic acid, preferably in an amount ranging from 0.005% by weight to 5% by weight, preferably from 0.01% by weight to 1% by weight, more preferably from 0.05% by weight to 0.5% by weight, relative to the total weight of the composition of the present invention.

[0099] In certain embodiments, the composition according to the present invention does not comprise a surfactant.

[0100] According to a preferred embodiment, the present invention provides a composition in the form of a hydrogel, comprising, relative to the total weight of the composition,

[0101] (i) from 0.15% by weight to 1.2% by weight of at least one non-ionic polysaccharide selected from glucomannan, konjac gum, Bletilla striata gum and a combination thereof;

[0102] (ii) from 0.15% by weight to 1.2% by weight of at least one ionic polysaccharide selected from xanthan gum, carrageenan, gellan gum and a combination thereof; and

[0103] (iii) from 0.25% by weight to 0.6% by weight of at least one preservative selected from chlorphenesin, 4-hydroxyacetophenone and a combination thereof,

[0104] wherein the weight ratio between the at least one non-ionic polysaccharide and the at least one ionic polysaccharide is from 1:3 to 4:1.

[0105] The composition according to the present invention is intended to be used in combination with a water-insoluble mask fabric.

[0106] According to the second aspect, the present invention provides a mask, preferably for caring for keratinous materials, comprising:

[0107] A) a water-insoluble mask fabric, and

[0108] B) the composition according to the first aspect of the present invention on the water-insoluble mask fabric. Water-insoluble mask fabric

[0109] For the purposes of the invention, the expression "water-insoluble" means that the mask fabric is not soluble in water and that it does not disintegrate upon immersion in water.

[0110] One skilled in the art can select 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.

[0111] The mask fabric may be a woven, knitted, or non-woven fabric made of natural fibers such as cotton, paper pulp, bamboo, cellulose, alginate, collagen, and protein, semi-natural fibers such as viscose rayon fibers, or synthetic fibers such as polyester fibers, polyethylene terephthalate fibers, polyethylene fibers, and polypropylene fibers. Two or more fibers selected from the above fibers may be used in combination.

[0112] The mask fabric may consist of one or more layers. If a mul- If a ticlée is used, the material of each layer can be the same or different from the others. The multi-layer fabric can be prepared by laminating multiple layers made from the materials mentioned above.

[0113] The mask fabric can have a wide variety of shapes, depending on the desired use and the characteristic of the mask.

[0114] The mask fabric is typically designed to fit the area to which topical application is desired. For example, when the mask is applied to the face, the mask fabric is designed to match the shape of the face, avoiding, if necessary, the eye, nostril, and mouth areas.

[0115] One skilled in the art can determine the thickness and texture of the mask fabric depending on the intended purpose. Preparation and use

[0116] The composition and mask according to the present invention can be prepared by routine practice.

[0117] Preferably, the composition according to the present invention is in the form of a hydrogel.

[0118] The composition and the mask according to the present invention are intended for topical application and can be used in particular for the care of keratinous materials, and in particular human skin.

[0119] According to the third aspect, the present invention provides a non-therapeutic process for caring for keratinous materials, comprising applying the mask according to the present invention to the keratinous materials.

[0120] In particular, the keratinous materials are the skin of the face and / or the skin around the eyes. Examples

[0121] The present invention is illustrated in more detail by the examples described below, which are given by way of non-limiting illustrations.

[0122] The main raw materials used, their trade names and their suppliers are listed in Table 1.

[0123] [Tables 1] INCI name Trade name Supplier Glucomannan KONJAC FLOUR HWG1002 BLG Xanthan gum KELTROL CG-T CP KELCO Chlorphenesin NIPAGUARD® CP HP CLARIANT

[0124] Inventive Examples 1 to 6 and Comparative Examples 1 and 2

[0125] The compositions of Inventive Examples (El.) 1 to 6 and Comparative Examples (EC.) 1 to 2 were prepared according to the quantities of components given in the Table 2. The quantity of each component is given in % by weight of the total weight of the composition containing it.

[0126] [Tables2] Components DI 1 DI 2 DI 3 El. 4 El. 5 El. 6 EC. 1 EC. 2 Glucomannan 0.4 0.2 0.8 0.5 0.5 0.4 0.4 0.1 Xanthan Gum 0.4 0.6 0.2 0.5 1.0 0.4 0.4 0.9 Glycerin 5 5 5 5 5 5 5 5 Salicylic Acid 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Chlorphenesin 0.3 0.3 0.3 0.3 0.3 0 0 0.3 Hydroxyacetophenone 0 0 0 0 0 0.5 0 0 Ethyl Lauroyl Arginate HCl 0 0 0 0 0 0 0.1 0 Water QS100 QS100 QS100 QS100 QS100 QS100 QS100 QS100

[0127] The compositions of Inventive Examples 1 to 6 represent the compositions of the present invention.

[0128] The composition of Comparative Example 1 comprises ethyl lauroyl arginate HCl in place of at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by chemical formula (I) and a combination thereof.

[0129] The composition of Comparative Example 2 comprises at least one non-ionic polysaccharide and at least one ionic polysaccharide with the weight ratio between the at least one non-ionic polysaccharide and the at least one ionic polysaccharide less than 1:5. Preparation of the compositions

[0130] The above compositions were prepared as follows:

[0131] 1) introduction of salicylic acid, chlorphenesin or hydroxyacetophenone or ethyl lauroyl arginate HCl, in water at a temperature of 80°C with stirring to obtain mixture A;

[0132] 2) mixing glucomannan and xanthan gum in glycerin at tem room temperature with stirring to obtain mixture B; and

[0133] 3) mixing of mixture A and mixture B at a temperature of 80°C with stirring to obtain hydrogels. Preparing the masks

[0134] The hydrogels obtained above were heated at 80°C for 30 minutes and coated on a fabric made from cellulose using a coating machine to form a film with a thickness of 0.3 mm, so as to obtain masks. Evaluation

[0135] The stickiness on the surface of each hydrogel was evaluated as follows.

[0136] 50 g of a hydrogel at 80 °C was poured into a container with a diameter of 40 mm and 60 mm high, cooled to room temperature and stored for 24 hours.

[0137] A synthetic leather (available under the name Supplare from Komatsu seiren company) above a probe (P20) on a texture analyzer (Model: Stable Micro Systems TAXT Plus from Xiamen Lotun science co., Ltd).

[0138] The probe was lowered to 1 cm above the hydrogel surface. The test program was started, the probe moved continuously for 25 mm and returned back until separation. The force between the probe and the hydrogel surface was detected and recorded. The lowest point force was used to evaluate the stickiness of the hydrogel surface, the lower the value, the less sticky it is. When the force is > 8 N, the hydrogel is considered sticky.

[0139] The stickiness of the surface of the hydrogels formed from the compositions of the Comparative Examples and the Inventive Examples is listed in Table 3.

[0140] [Tables3] Properties EL 1 EL 2 EL 3 EL 4 El. 5 El. 6 EC. 1 EC. 2 Stickiness (N) 1.37 2.33 2.10 1.76 1.88 6.67 10.88 11.89

[0141] It can be seen that the surface of the hydrogels formed from the composition according to the present invention is not sticky.

Claims

Claims

1. Composition, preferably for the care of keratinous materials, comprising (i) at least one non-ionic polysaccharide chosen from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and a combination thereof; (ii) at least one ionic polysaccharide chosen from xanthan gum, carrageenan, gellan gum and a combination thereof;and (iii) at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds represented by the following chemical formula (I), and a combination thereof, » ® KC—0 R? wherein R5, R6 and R7, each independently, represent a hydrogen atom, a hydroxyl group, a C1-C6 alkyl group or a C1-C6 alkoxy group, provided that at least one of R5, R6 and R7 represents a hydroxyl group, and R represents a C1-C6 alkyl group or an aryl group, wherein the weight ratio of the at least one non-ionic polysaccharide to the at least one ionic polysaccharide is at least 1:5.;

2. The composition of claim 1, 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 glucomannan, konjac gum, Bletilla striata gum, and a combination thereof.

3. A composition according to any one of claims 1 or 2, wherein the total amount of the non-ionic polysaccharide and the poly- ionic saccharide is from 0.1% by weight to 15% by weight, preferably from 0.3% by weight to 10% by weight, more preferably from 0.5% by weight to 2.5% by weight, even more preferably from 0.6% by weight to 2.0% by weight, most preferably from 0.8% by weight to 1.5% by weight, relative to the total weight of the composition.

4. A composition according to any one of claims 1 to 3, wherein the weight ratio of non-ionic polysaccharide to ionic polysaccharide in the composition is from 1:4 to 10:1, more preferably from 1:3 to 8:1, more preferably from 1:3 to 5:1, even more preferably from 1:3 to 4:

1.

5. A composition according to any one of claims 1 to 4, wherein the preservative is selected from chlorphenesin and its derivatives, hydroxyacetophenone, and a combination thereof, preferably the preservative is selected from chlorphenesin, 4-hydroxyacetophenone, and a combination thereof, preferably the preservative is present in an amount ranging from 0.02% by weight to 10% by weight, preferably from 0.05% by weight to 5% by weight, more preferably from 0.1% by weight to 1.0% by weight, even more preferably from 0.2% by weight to 0.8% by weight, most preferably from 0.25% by weight to 0.6% by weight, relative to the total weight of the composition.

6. A composition according to any one of claims 1 to 5, which is oil-free.

7. A composition according to any one of claims 1 to 6, which is in hydrogel form.

8. A composition according to claim 1, which is in the form of a hydrogel comprising, relative to the total weight of the composition, (i) from 0.15% by weight to 1.2% by weight of at least one non-ionic polysaccharide selected from glucomannan, konjac gum, Bletilla striata gum and a combination thereof; (ii) from 0.15% by weight to 1.2% by weight of at least one ionic polysaccharide selected from xanthan gum, carrageenan, gellan gum and a combination thereof; and (iii) from 0.25% by weight to 0.6% by weight of at least one preservative selected from chlorphenesin, 4-hydroxyacetophenone and a combination thereof, wherein the weight ratio of the at least one non-ionic polysaccharide to the at least one ionic polysaccharide is from 1:3 to 4:

1.

9. Mask, preferably for the care of keratinous materials, comprising: A) a water-insoluble mask fabric; and B) the composition according to any one of claims 1 to 8 on the water-insoluble mask fabric.

10. Non-therapeutic process for caring for keratinous materials, comprising applying the mask according to claim 9 to the keratinous materials.