Compositions comprising extracts of stems and axillary buds of rose bushes

Abstract

The present invention relates to a composition, preferably a cosmetic, comprising: at least one rose plant extract comprising polyphenols, and at least one solvent, the solvent being selected from a polyol comprising at least 3 hydroxyl functional groups, a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and water, and a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and at least one diol comprising 2 to 4 carbon atoms, the weight ratio of the rose plant extract to the solvent being strictly less than 7:13.

Description

Technical Field

[0001] The present invention relates to a composition, preferably a cosmetic composition, comprising a rose plant extract rich in polyphenols. Background Art

[0002] Human skin consists of two main layers, the dermis and the epidermis covering the surface of the dermis. The natural human epidermis is mainly composed of three types of cells, namely keratinocytes (mainly the majority), melanocytes and Langerhans cells. Each of these cell types contributes to the key role played by the skin in the body through its specific functions, especially the role of protecting the body from external attacks (climate, UV rays, tobacco, etc.), which is called "barrier function".

[0003] The epidermis is a cornified stratified squamous epithelium formed by 90% keratinocytes. The basement membrane cells that separate the dermis and epidermis gradually differentiate toward the surface of the epidermis, especially including the differentiation of keratinocytes, which migrate to the surface of the skin and desquamate there.

[0004] The aging of the epidermis is mainly manifested by a decrease in its thickness. Epidermal atrophy is the result of a slowdown in the proliferation of keratinocytes and the accumulation of senescent keratinocytes. The stratum corneum becomes dull and lifeless.

[0005] Desquamation is a natural phenomenon associated with the continuous regeneration of the epidermis, which constitutes the upper layer of the skin. The epidermis consists of several cell layers, the deepest of which is the basal layer, which is composed of undifferentiated cells. Over time, these cells will differentiate and migrate to the surface of the epidermis, forming the various layers of the epidermis until the keratinocytes are formed on the surface of the epidermis, which are the dead cells eliminated by desquamation. This loss of surface is offset by the migration of cells from the basal layer to the surface of the epidermis. This is a continuous renewal of the skin. The forced removal of the stratum corneum accelerates renewal and helps fight aging.

[0006] At the same time, these cells continue to differentiate, and the final stage is the stratum corneum cells. In fact, these dead cells form the last layer of the epidermis, the outermost layer, also called the stratum corneum.

[0007] Furthermore, during the chronological and / or actinic aging process, the skin is subjected to oxidative stress, which can be summarized as the oxidative attack of all cellular biomacromolecules (DNA, lipids, proteins) by reactive oxygen species (ROS), such as superoxide radicals O2 - , hydrogen peroxide H2O2, hydroxyl radical HO°, singlet oxygen 1 O2 or nitrogen (RNS: peroxynitrite ONOO), nitric oxide (NO). This oxidative stress, which can be physiological or caused by external factors such as UV rays, pollution or tobacco, induces cell and tissue damage, thus contributing to skin aging.

[0008] For the skin, UVA rays (320-400 nm) are the main source of oxidative stress for the skin. They are absorbed by chromophores, which transfer the energy required for oxygen to become an active singlet state ( 1 O2). UVA rays also induce the reduction of O2 to superoxide anion (O2 - ), which is then rapidly dismutated to hydrogen peroxide (H2O2) by the superoxide dismutase (SOD) enzyme. H2O2 is then reduced to hydroxyl radicals (OH°) in the presence of ferrous ions (Fenton reaction) or by superoxide radical anions (Flaber-Weiss). Hydroxyl radicals are the most reactive and can remove hydrogen from any neighboring molecule RH to generate alkyl radicals (R°), which are the precursor forms of peroxyl radicals and alkoxyl radicals (ROO° and RO°), which participate in the propagation phase of the autooxidation process. These reactive forms of oxygen are interdependent.

[0009] Therefore, it is clearly recognized that it is important to combat oxidative skin stress to limit skin aging.

[0010] Antioxidant active agents have been proposed to combat oxidative skin stress.

[0011] Antioxidant active agents include polyphenols in particular. These compounds are in particular flavonoid polyphenols, such as epigallocatechin, epicatechin 3-gallate, epicatechin 3-gallate, baicalin, taxifolin, quercetin, hesperidin or genistein; or non-flavonoid polyphenols, such as resveratrol. Among these polyphenols, some are derived from plant extracts.

[0012] However, plant extracts containing large amounts of polyphenols generally have solubility problems in water. In addition, they give the resulting composition a turbid appearance. Summary of the invention

[0013] The inventors have now discovered that combining specific plant extracts comprising large amounts of polyphenols with specific glycols, such as glycerol, makes it possible to dissolve these polyphenols in a hydrophilic medium and to obtain a non-turbid and stable composition.

[0014] Therefore, the present invention relates to a composition comprising:

[0015] at least one rose plant extract comprising polyphenols, and

[0016] At least one solvent selected from:

[0017] - a polyol comprising at least 3 hydroxyl functional groups, wherein said polyol is the sole solvent for said composition,

[0018] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and water, and

[0019] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and at least one diol comprising 2 to 4 carbon atoms,

[0020] The weight ratio of the rose plant extract to the solvent is strictly less than 7:13.

[0021] The composition of the present invention is preferably a cosmetic product.

[0022] In fact, as shown in the examples, a polyol containing at least 3 hydroxyl functional groups, such as glycerol, can dissolve the polyphenols contained in the plant extract to obtain a homogeneous, transparent and stable composition of the invention.

[0023] The term "stable" composition refers to a composition that does not sediment after centrifugation, specifically a composition that does not have sediment for at least 24 hours after centrifugation at 900g for 1 hour at ambient temperature. In addition, a composition is considered "stable" if no sedimentation occurs after centrifugation at ambient temperature, 4°C, 37°C and 45°C for up to two months.

[0024] The present invention also relates to a kit, comprising:

[0025] at least one composition according to the invention; and

[0026] At least one cosmetic composition comprising at least one aqueous phase and / or at least one oily phase.

[0027] The invention also relates to a method for cosmetic care of keratin materials, preferably the skin, comprising applying to said keratin materials a composition according to the invention.

[0028] The invention also relates to the cosmetic use of a composition according to the invention for combating oxidative skin stress. The invention also relates to the cosmetic use of a composition according to the invention for combating signs of skin ageing, such as wrinkles or fine lines. DETAILED DESCRIPTION

[0029] Rose plant extract including polyphenols

[0030] The composition according to the invention comprises at least one rose plant extract comprising polyphenols.

[0031] Polyphenols represent a family of organic molecules found widely in the plant kingdom. The term "polyphenol" refers to compounds comprising at least two phenolic groups; these phenolic groups may be associated in a more or less complex structure, they generally have a high molecular weight.

[0032] Among the polyphenols, mention may in particular be made of flavonoid polyphenols, such as epigallocatechin, epigallocatechin 3-gallate, epicatechin 3-gallate, baicalin, taxifolin, quercetin, hesperetin or genistein, or non-flavonoid polyphenols, such as resveratrol.

[0033] The rose plant extract of the present invention is an extract rich in polyphenols. Relative to the total weight of the extract, the rose plant extract comprises at least 20 weight %, preferably at least 30 weight % of polyphenols.

[0034] Typically, rose plant extracts are obtained from stems and / or leaves and / or suckers of rose bushes. Preferably, the roses used are preferably of the Rosa genus, and the species is preferably Rosa centifolia. Preferably, the roses used are grown in southern France, and the stems and / or leaves and / or suckers are cut at the end of winter.

[0035] The extract is usually obtained by the following method:

[0036] a) extracting the stems and / or leaves and / or axillary buds of a rose bush in a hydroalcoholic mixture, preferably at a temperature lower than or equal to 90° C., to obtain a hydroalcoholic mixture comprising an extract;

[0037] b) removing plant debris and / or solid particles from the hydroalcoholic mixture comprising the extract obtained in a) to obtain a liquid comprising a rose plant extract. Step b) may in particular comprise a primary separation step, a centrifugation step and / or a filtration step. Preferably, step b) comprises removing plant debris from the hydroalcoholic mixture comprising the extract obtained in a), in particular by separation, and then removing solid particles, in particular by centrifugation and / or filtration;

[0038] c) Then, preferably, the liquid containing the rose plant extract obtained in b) is atomized to obtain the rose plant extract containing polyphenols in a powdered form.

[0039] Preferably, the rose plant extract comprising polyphenols according to the present invention is presented in the form of a powder. Typically, the powder is dark, brown to black.

[0040] Preferably, the rose plant extract comprising polyphenols according to the invention is present in an amount less than or equal to 35% by weight, preferably less than or equal to 30% by weight, relative to the total weight of the composition.

[0041] Preferably, the rose plant extract comprising polyphenols according to the present invention is present in an amount of at least 0.01% by weight, preferably at least 0.05% by weight, preferably at least 0.1% by weight, preferably at least 1% by weight, preferably at least 1.5% by weight, preferably at least 2% by weight relative to the total weight of the composition.

[0042] Solvents

[0043] The composition according to the invention comprises at least one solvent selected from:

[0044] - a polyol comprising at least 3 hydroxyl functional groups, wherein the polyol is the only solvent for the composition,

[0045] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and water, and

[0046] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and at least one diol comprising 2 to 4 carbon atoms.

[0047] Furthermore, the composition according to the invention preferably comprises at least 0.01%, at least 2% by weight, at least 4% by weight, at least 6% by weight, at least 10% by weight, at least 20% by weight, at least 35% by weight of polyols comprising at least 3 hydroxyl functions, relative to the total weight of the composition.

[0048] According to the term of the present invention, the polyol comprising at least 3 hydroxyl functional groups refers to a hydrocarbon chain having at least 2 carbon atoms, preferably 2 to 50 carbon atoms, preferably 3 to 20 carbon atoms, preferably 2 to 10 carbon atoms, more preferably 2 to 6 carbon atoms, and has at least 3 hydroxyl groups. The molecular weight average of the polyol used in the present invention can be less than or equal to 1000 g / mol, preferably between 85 and 500 g / mol.

[0049] The polyol comprising at least three functional groups may be a natural or synthetic polyol. The polyol may have a linear, branched or cyclic molecular structure.

[0050] The polyol comprising at least 3 hydroxyl functional groups may be selected from glycerol and its derivatives, and glycols and their derivatives comprising at least 3 hydroxyl functional groups. The polyol comprising at least 3 hydroxyl functional groups may be selected from the group consisting of glycerol (glycerin or glycerol), diglycerin (diglycerin or diglycerol), sugars such as sorbitol and mixtures thereof.

[0051] More particularly, the polyol comprising at least 3 hydroxyl functional groups is glycerol.

[0052] According to the present invention, the weight ratio of rose plant extract to solvent is strictly less than 7:13 (i.e. 0.538). Preferably, the weight ratio of rose plant extract to solvent is less than or equal to 0.5, preferably less than or equal to 0.45. Preferably, the weight ratio of rose plant extract to solvent is at least 0.01, preferably at least 0.02.

[0053] When the rose plant extract according to the invention is present in an amount of at least 1% by weight relative to the total weight of the composition, the polyol according to the invention comprising at least 3 hydroxyl functional groups is present in an amount of at least 35% by weight relative to the total weight of the composition, preferably at least 40% by weight, preferably at least 45% by weight.

[0054] When the rose plant extract according to the invention is present in an amount of at least 1% by weight relative to the total weight of the composition, the polyol according to the invention comprising at least 3 hydroxyl functional groups may be present in a concentration of 35 to 99% by weight relative to the total weight of the composition, preferably 40 to 95% by weight, preferably 50 to 90% by weight.

[0055] The polyol comprising at least 3 hydroxyl functional groups can be used alone; it is then the only solvent. In this case, when the rose plant extract according to the invention is present in an amount of at least 1% by weight relative to the total weight of the composition, the polyol comprising at least 3 hydroxyl functional groups according to the invention may be present in a concentration of 35 to 99% by weight, preferably 50 to 98.5% by weight, preferably 60 to 98% by weight, relative to the total weight of the composition. In particular, when the polyol comprising at least 3 hydroxyl functional groups is used alone (as a single / only solvent), the composition does not contain any other solvent (including water and / or a diol comprising 2 to 4 carbon atoms). Typically, when the polyol comprising at least 3 hydroxyl functional groups is used alone (as a single solvent), the composition does not contain water, dipropylene glycol and / or pentylene glycol.

[0056] According to a further embodiment, the solvent is a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and water. In this case, when the rose plant extract according to the present invention is present in an amount of at least 1% by weight relative to the total weight of the composition, the polyol comprising at least 3 hydroxyl functional groups according to the present invention may be present in a concentration of 35 to 90% by weight relative to the total weight of the composition; and water is present in a concentration of preferably 10 to 65% by weight, more preferably 20 to 55% by weight.

[0057] According to a further embodiment, the solvent is a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and at least one diol comprising 2 to 4 carbon atoms. Preferably, the diol comprising 2 to 4 carbon atoms is a diol comprising a linear carbon chain, preferably, the diol is propylene glycol, preferably 1,2-propylene glycol. When the rose plant extract according to the invention is present in an amount of at least 1% by weight relative to the total weight of the composition, the polyol comprising at least 3 hydroxyl functional groups according to the invention may be present in a concentration of 35 to 90% by weight, preferably 45 to 55% by weight relative to the total weight of the composition; and the diol comprising 2 to 4 carbon atoms is preferably present in a concentration of 40 to 70% by weight, preferably 45 to 55% by weight.

[0058] Preferably, the composition according to the invention consists of:

[0059] at least one rose plant extract comprising polyphenols, and

[0060] At least one solvent selected from:

[0061] - a polyol comprising at least 3 hydroxyl functional groups, wherein the polyol is the only solvent for the composition,

[0062] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and water, and

[0063] - a mixture of at least one polyol comprising at least 3 hydroxyl functional groups and at least one diol comprising 2 to 4 carbon atoms,

[0064] The weight ratio of rose plant extract to solvent is strictly less than 7:13.

[0065] Preferably, the weight ratio of the rose plant extract to the solvent is less than or equal to 0.5, preferably less than or equal to 0.45. Preferably, the weight ratio of the rose plant extract to the solvent is at least 0.01, preferably at least 0.02.

[0066] Kit according to the invention

[0067] The present invention also relates to a kit, comprising:

[0068] at least one composition according to the invention (also referred to as "composition A"); and

[0069] At least one cosmetic composition comprising at least one aqueous phase and / or at least one oily phase (also referred to as "composition B").

[0070] The composition of the invention is as described above. Preferably, the composition is packaged in a pipette which can be broken before mixing and application to the keratin material, preferably the skin.

[0071] Generally, a composition according to the invention (composition A) is mixed with a cosmetic composition comprising at least one aqueous phase and / or at least one oily phase (composition B) and then applied to keratin materials, in particular the skin.

[0072] The cosmetic composition comprising at least one aqueous phase and / or at least one oily phase may be an emulsion or a gel. Preferably, such a composition comprises an aqueous phase and an oily phase, the aqueous phase and the oily phase being as defined above. Preferably, such a composition is an oil-in-water emulsion.

[0073] Water Phase

[0074] Composition B may comprise a physiologically acceptable aqueous medium. By "physiologically acceptable" is meant a medium that is compatible with keratin materials.

[0075] Composition B preferably comprises an aqueous medium comprising water and optionally an organic solvent soluble in water at 25°C, the organic solvent being selected from, for example, linear or branched C2-C4 alkanols, such as ethanol and isopropanol, propanol, butanol; polyols; and mixtures thereof.

[0076] The polyol may be selected from compounds having a hydrocarbon chain of at least 2 carbon atoms and having at least two hydroxyl groups, the hydrocarbon chain preferably having 2 to 50 carbon atoms, preferably 4 to 20 carbon atoms, preferably 2 to 10 carbon atoms, preferably 2 to 6 carbon atoms. The polyol may be a natural or synthetic polyol. The polyol may have a straight chain, a branched chain or a cyclic molecular structure.

[0077] The polyol may be selected from glycerol and its derivatives, and glycols and their derivatives. The polyol may be selected from the group consisting of glycerol, diglycerol, polyglycerol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, pentanediol, hexanediol, 1,3-propanediol, 1,5-pentanediol, 1,2-octanediol, polyethylene glycol (especially having 5 to 50 ethylene oxide groups), and sugars such as sorbitol, and mixtures thereof.

[0078] The polyol may be present in an amount of 2 to 30% by weight, preferably 3 to 25% by weight, preferably 5 to 20% by weight, relative to the total weight of composition B.

[0079] Composition B generally comprises 10 to 95% by weight of water, preferably 40 to 80% by weight, relative to the total weight of the composition.

[0080] The amount of organic solvent relative to the total weight of composition B may be, for example, 0 to 30% by weight, preferably 0.5 to 25% by weight, more preferably 5 to 20% by weight, even more preferably 10 to 22% by weight.

[0081] oil phase

[0082] Composition B may include at least one oil phase. When the composition includes an oil phase, the oil phase preferably comprises at least one oil, in particular a cosmetic oil. It may further comprise other fats.

[0083] By way of oils suitable for use in the composition, mention may be made, for example:

[0084] - hydrocarbon oils of animal origin, such as perhydrosqualene;

[0085] - hydrocarbon oils of vegetable origin, for example liquid fatty acid triglycerides having 4 to 10 carbon atoms, for example heptanoic acid or caprylic acid triglycerides, or for example sunflower oil, corn oil, soybean oil, pumpkin oil, grapeseed oil, sesame oil, hazelnut oil, almond oil, macadamia oil, arara oil, sunflower oil, castor oil, avocado oil, caprylic / caprylic acid triglycerides, for example sold by Stearineries Dubois or under the trade names Miglyol "810", "812" and "818" by Dynamit Nobel, jojoba oil, shea butter oil;

[0086] - esters and synthetic esters, in particular fatty acids, for example oils of the formula R1COOR2 and R1OR2, in which R1 is the residue of a fatty acid having 8 to 29 carbon atoms and R2 is a branched or unbranched hydrocarbon chain containing 3 to 30 carbon atoms, for example purcellin oil, isononyl isononanoate, isopropyl myristate, ethyl-2-hexyl palmitate, octyl-2-dodecyl stearate, octyl-2-dodecyl erucate, isostearyl isostearate; hydroxylated esters, such as isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, citrate); heptanoate, octanoate, decanoate of fatty alcohols; polyol esters, such as propylene glycol dicaprylate, neopentyl glycol diheptanoate and ethylene glycol diisononanoate; and pentaerythritol esters, such as pentaerythritol tetraisostearate or pentaerythritol tetraoctanoate;

[0087] - straight-chain or branched hydrocarbons of inorganic or synthetic origin, such as volatile or non-volatile paraffin oils and their derivatives, hydrocarbon oils with branched chains containing 10 to 20 carbon atoms, such as isohexadecane, isododecane, isoparaffins and mixtures thereof, petroleum jelly, polydecene, hydrogenated polyisobutene (such as Oil);

[0088] fatty alcohols having 8 to 26 carbon atoms, for example cetyl alcohol, stearyl alcohol, a mixture of cetyl alcohol and stearyl alcohol (cetostearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleic acid or linoleic acid;

[0089] - some hydrocarbon and / or silicone fluorinated oils, as described in JP-A-2-295912;

[0090] Silicone oils, such as polymethylsiloxanes (PDMS), optionally with linear or cyclic siloxane chains, liquid or pasty at ambient temperature, in particular cyclic polydimethylsiloxanes (cyclomethicones), such as cyclohexasiloxane; polydimethylsiloxanes, including alkyl, alkoxy or phenyl side chains or silicon chain end groups, said groups having 2 to 24 carbon atoms; phenyl siloxanes, such as phenyl trimethicone, phenyl dimethicone, phenyl trimethylsiloxydiphenylsiloxane, diphenyl dimethicone, diphenyl methyl diphenyl trisiloxane, 2-phenyl ethyl trimethylsiloxysilicate and polymethylphenyl siloxane; or

[0091] - A mixture thereof.

[0092] The amount of oil phase may range, for example, from 0.1 to 30% by weight and for example from 1 to 20% by weight relative to the total weight of composition B.

[0093] Composition B may also comprise customary cosmetic adjuvants, in particular chosen from gelling agents, surfactants, preservatives, electrolytes, pH regulators, ionic or nonionic thickeners, wetting agents, antifoaming agents, perfumes, active agents, in particular anti-aging agents, fillers or any ingredient usually used in the cosmetic and / or dermatological fields.

[0094] The invention also relates to a method for cosmetic care of keratin materials, preferably the skin, comprising applying to said keratin materials a composition according to the invention.

[0095] The invention also relates to the cosmetic use of a composition according to the invention for combating oxidative skin stress.The invention also relates to the cosmetic use of a composition according to the invention for combating signs of skin ageing, such as wrinkles or fine lines.

[0096] We will now give specific examples to illustrate the present invention, but this is by no means limiting.

[0097] In the examples, unless otherwise indicated, temperature is in degrees Celsius and is ambient temperature (20° C.); unless otherwise indicated, pressure is atmospheric pressure.

[0098] In the examples, the amounts of ingredients of the compositions are given as % by weight (% w / w), relative to the total weight of the composition.

[0099] Example 1: Dissolution of rose plant extract in various solvents

[0100] 200 g of rose plant extract obtained from the leaves and stems of Rosa centifolia according to the method described in the specification, the rose plant extract comprising 30 wt % to 50 wt % polyphenols relative to the total weight of the extract, was mixed with various solvents at ambient temperature using a rotor-stator in powder form before testing various evaluation criteria.

[0101] The evaluation criteria are as follows:

[0102] -Solubility of the mixture after homogenization;

[0103] - Stability of the dispersion after centrifugation at 900 g for 1 h for 24 h; and

[0104] - Transparency of the dispersion (if relevant).

[0105] The compositions and results are shown in Tables 1 to 3.

[0106] Mixtures A to E, G to J, M and O are comparative mixtures.

[0107] Mixtures F, L and N are mixtures according to the invention (marked with an asterisk).

[0108] [Table 1]

[0109]

[0110] [Table 2]

[0111]

[0112] in conclusion:

[0113] Of the solvents tested, glycerol was the only solvent that was completely soluble, stable during centrifugation, and produced a translucent mixture.

[0114] [Table 3]

[0115]

[0116] in conclusion:

[0117] Glycerol can be used alone or in combination with 50% 1,2-propylene glycol to obtain a mixture that is stable and translucent in centrifugation.

[0118] Example 2: Determination of the solubility limit of rose plant extract in glycerol

[0119] As shown in Example 1, the use of glycerol as a solvent for rose plant extracts allows the extracts to be dissolved at ambient temperature and a translucent mixture is obtained.

[0120] Various mixtures M1 to M7 were prepared, containing different amounts of extract and glycerol.

[0121] The evaluation criteria are as follows:

[0122] - Solubility of the mixture after homogenizer mixing (appearance); and

[0123] - Stability of the dispersion for 24 h after centrifugation at 900 g for 1 h.

[0124] The results are shown in Table 4.

[0125] [Table 4]

[0126]

[0127] in conclusion:

[0128] The solubilization limit of rose plant extract is around 30%.

[0129] The best solubilization result is when the extract accounts for 15% to 25% by weight of the total weight of the composition.

[0130] Example 3: Compositions and kits according to the present invention

[0131] According to the invention, the composition described in Table 5 below can be used as a synergist, in particular mixed in an amount of 6% with the cosmetic composition described in Table 6 (essence). The mixture is obtained before application on the skin.

[0132] Typically, the composition of Table 5 (boost) can be packaged in a pipette, broken up before mixing with the cosmetic composition of Table 6 (essence), and then applied to the skin.

[0133] [Table 5]

[0134] Ingredients (%w / w) Compositions according to the invention Rose Plant Extract 2 glycerin 98

[0135] [Table 6]

[0136]

[0137] The above composition is prepared by the following method:

[0138] Phase A is mixed at ambient temperature in a stirrer (for example the MAXILAB TURBOTEST sold by OLSA with a homogenizer turbine at the bottom of the kettle) at a speed of 1000 rpm until the solution is homogeneous;

[0139] Phase B was introduced into phase A in a stirrer at room temperature at 2500 rpm to obtain a homogeneous gel;

[0140] Add phase C to the mixture A+B using a stirrer at a speed of 2500-3000 rpm to obtain a well-homogeneous solution.

Claims

1. A composition comprising: at least one rose plant extract in powder form and comprising 30% to 50% by weight of polyphenols relative to the weight of the extract, and The solvent of the rose plant extract is selected from: Glycerol, wherein the weight ratio of the rose plant extract to the solvent is strictly less than or equal to 3:7, A mixture of glycerol and water in a volume ratio of 35:50, the weight ratio of the rose plant extract to the solvent is strictly less than or equal to 15:85, and A mixture of glycerol and 1,2-propylene glycol in a volume ratio of 1:1, wherein the weight ratio of the rose plant extract to the solvent is strictly less than or equal to 2:98, The weight ratio of the rose plant extract to the solvent is at least 0.01, and the rose plant extract including polyphenols is present in an amount less than or equal to 30 wt % relative to the total weight of the composition.

2. The composition according to claim 1, wherein The composition is a cosmetic.

3. The composition according to claim 1, wherein The rose plant extract including polyphenols is present in an amount of at least 0.01 wt % relative to the total weight of the composition.

4. The composition according to claim 3, wherein The rose plant extract including polyphenols is present in an amount of at least 0.05 wt % relative to the total weight of the composition.

5. The composition according to claim 3, wherein The rose plant extract including polyphenols is present in an amount of at least 0.1 wt % relative to the total weight of the composition.

6. The composition according to claim 1, wherein The weight ratio of the rose plant extract to the solvent is at least 0.

02.

7. The composition according to claim 1, wherein The rose plant extract is obtained from the stems and / or leaves and / or axillary buds of the rose bush.

8. The composition according to claim 1, wherein The roses used were of the genus Rosa.

9. The composition according to claim 1, wherein The rose species used is Rosa centifolia Rosa centifolia .

10. Cosmetic use of the composition according to any one of claims 1 to 9, wherein the use is for combating oxidative skin stress.

11. Cosmetic use of a composition according to any one of claims 1 to 9, wherein the use is to combat the signs of skin aging.

12. Cosmetic use of a composition according to claim 11, wherein the use is to combat wrinkles or fine lines.

13. A kit comprising: At least one composition according to any one of claims 1 to 9; as well as At least one cosmetic composition comprising at least one aqueous phase and / or at least one oily phase.

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