Composition comprising polyisoprenes

Abstract

The present invention relates to a plant extract comprising at least one polyisoprene M1 having a weight-average molecular weight (Mw) greater than 250 kDa and at least one polyisoprene M2 having a weight-average molecular weight (Mw) in a range from 10 kDa to 40 kDa, and to the method for obtaining same. The invention further relates to the use of the extract in the fields of cosmetics, pharmaceuticals, coatings, inks, varnishes, paper, adhesives, candles, plastics, rubbers and / or food products.

Description

COMPOSITION CONTAINING POLYISOPRENES

[0001] The present invention relates to a plant extract comprising at least one polyisoprene M1 with a mass average molecular mass (Mw) greater than 250 kDa and at least one polyisoprene M2 with a mass average molecular mass (Mw) in the range of 10 kDa to 40 kDa and its method of obtaining.

[0002] The invention also relates to the use of said extract in the fields of cosmetics, pharmaceuticals, coatings, inks, varnishes, paper, adhesives, candles, plastics, rubbers and / or food products.

[0003] The plant extract according to the invention also has the advantage of being an alternative to paraffins, respectful of humans and the environment, non-ecotoxic and bioaccumulative, natural, renewable, vegan, low toxicity and exhibiting an excellent naturalness index.

[0004] It also has the advantage of maintaining very high stability over time in its rheological, functional, safety, and viscosity properties, and exhibits high resistance to hydrolysis.

[0005] Finally, it has many properties of interest for its use in cosmetics, including softening and melting temperatures particularly suited to formulation, emulsifiable characteristics, spreading properties, film-forming characteristics, gelling power and a hair-coating effect.

[0006] Also, the extract according to the invention combined with one or more ingredients is a bio-based and plant-based alternative to petroleum jelly, lanolin, synthetic polyisoprenes and dimethicones.

[0007] The plant extract according to the invention can finally be obtained from shea Vitellaria paradoxa or also called Butyrospermum parkii),'), more precisely from shea butter (INCI: BUTYROSPERMUM PARKII BUTTER) and in particular from the precipitate from a shea butter fractionation process, which is an unvalued co-product of the shea butter industry.

[0008] A first object of the invention relates to a plant extract comprising at least one polyisoprene M1 with a mass average molecular mass (Mw) greater than 250 kDa and at least one polyisoprene M2 with a mass average molecular mass (Mw) within a range of 10 kDa to 40 kDa and its method of obtaining.

[0009] In one embodiment, the polyisoprene Ml has a mass average molecular weight (Mw) in the range of 250 kDa to 600 kDa

[0010] The said extract may further comprise at least M3 glycerides of mass average molecular mass (Mw) within a range of 1 kDa to 3 kDa.

[0011] It may also further comprise at least M4 fatty acids with a mass average molecular weight (Mw) in the range of greater than 0.40 kDa to 1 kDa.

[0012] For the purposes of this invention, "plant extract" means a substance obtained exclusively by chemical, physical, mechanical, or biological processing of at least one plant. The term is used in particular in contrast to a synthetic product, in that it excludes any substance obtained by processes involving chemical synthesis steps.

[0013] The plant extract according to the present invention is therefore bio-based, that is to say comprising at least 95% bio-based carbon, as determined by the ASTM D6866-12 standard (Standard Test Methods for Determining the Biobased Content of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis).

[0014] In one embodiment, the plant extract according to the invention is characterized in that its unsaponifiable content is within a range of 85% to 100% (w / w) relative to the total mass of the plant extract.

[0015] In one embodiment, the plant extract according to the invention is characterized in that its unsaponifiable content is within a range of 90% to 99% (w / w) relative to the total mass of the plant extract.

[0016] In one embodiment, the plant extract according to the invention is characterized in that its unsaponifiable content is within a range of 93% to 98% (w / w) relative to the total mass of the plant extract.

[0017] For the purposes of this invention, "unsaponifiable" means compounds that are insoluble in water but soluble in organic solvents. This includes any lipophilic and non-saponifiable substance. Unsaponifiables include, in particular, squalene, sterols, methyl sterols, triterpene alcohols, tocopherols, and / or hydrocarbons.

[0018] The determination of the unsaponifiable content can be carried out by any method commonly known to those skilled in the art. Advantageously, it can be carried out by the standardized method NF EN ISO 18609.

[0019] The very high unsaponifiable content has the advantage of guaranteeing the stability over time of the rheological, functional, safety properties, softening temperature, viscosity, resistance to water and hydrolysis.

[0020] In fact, in formulation, the plant extract according to the invention possesses, in particular, emulsifiable characteristics, spreading properties, a film-forming character, gelling power, and a significantly superior hair-coating effect. to any fraction or extract having a lower unsaponifiable content. Consequently, the sensory properties of the formulations, a very important criterion in cosmetics, are significantly better with the plant extract according to the invention.

[0021] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M1 and M2 is within a range of 75% to 100% (m / m) relative to the total mass of the plant extract.

[0022] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M1 and M2 is within a range of 85% to 98% (w / w) relative to the total mass of the plant extract.

[0023] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M1 and M2 is within a range of 88% to 96% (w / w) relative to the total mass of the plant extract.

[0024] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene Ml is within a range of 15% to 50% (w / w) relative to the total mass of the plant extract.

[0025] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene Ml is within a range of 25% to 45% (w / w) relative to the total mass of the plant extract.

[0026] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene Ml is within a range of 30% to 40% (w / w) relative to the total mass of the plant extract.

[0027] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M2 is within a range of 25% to 80% (w / w) relative to the total mass of the plant extract.

[0028] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M2 is within a range of 40% to 75% (w / w) relative to the total mass of the plant extract.

[0029] In one embodiment, the plant extract according to the invention is characterized in that its mass content of polyisoprene M2 is within a range of 55% to 65% (w / w) relative to the total mass of the plant extract.

[0030] In one embodiment, the plant extract according to the invention is characterized in that its mass content of glycerides M3 is within a range of 0% to 25% (w / w) relative to the total mass of the plant extract.

[0031] In one embodiment, the plant extract according to the invention is characterized in that its mass content of glycerides M3 is within a range of 0.5% to 20% (w / w) relative to the total mass of the plant extract.

[0032] In one embodiment, the plant extract according to the invention is characterized in that its mass content of glycerides M3 is within a range of 0.5% to 10% (w / w) relative to the total mass of the plant extract.

[0033] In one embodiment, the plant extract according to the invention is characterized in that its mass content of glycerides M3 is within a range of 0.5% to 5% (w / w) relative to the total mass of the plant extract.

[0034] In one embodiment, the plant extract according to the invention is characterized in that its mass content of M4 fatty acids is within a range of 0% to 15% (w / w) relative to the total mass of the plant extract.

[0035] In one embodiment, the plant extract according to the invention is characterized in that its mass content of M4 fatty acids is within a range of 1% to 10% (w / w) relative to the total mass of the plant extract.

[0036] In one embodiment, the plant extract according to the invention is characterized in that its mass content of M4 fatty acids is within a range of 2% to 6% (w / w) relative to the total mass of the plant extract.

[0037] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular mass (Mw) within a range of 300 kDa to 550 kDa.

[0038] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular mass (Mw) within a range of 300 kDa to 500 kDa.

[0039] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular mass (Mw) within a range of 300 kDa to 400 kDa.

[0040] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular mass (Mw) within a range of 320 kDa to 380 kDa.

[0041] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular mass (Mw) within a range of 340 kDa to 360 kDa.

[0042] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene Ml has a mass average molecular weight (Mw) within a range of 250 kDa to 370 kDa.

[0043] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene M2 has a mass average molecular weight (Mw) within a range of 15 kDa to 30 kDa.

[0044] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprene M2 has a mass average molecular weight (Mw) within a range of 18 kDa to 25 kDa.

[0045] In one embodiment, the plant extract according to the invention is characterized in that the M3 glycerides have a mass average molecular mass (Mw) within a range of 1.5 kDa to 2.5 kDa.

[0046] In one embodiment, the plant extract according to the invention is characterized in that the M3 glycerides have a mass average molecular mass (Mw) within a range of 1.8 kDa to 2 kDa.

[0047] In one embodiment, the plant extract according to the invention is characterized in that the M4 fatty acids have a mass average molecular mass (Mw) within a range of 0.5 kDa to 0.8 kDa.

[0048] The determination of the mass average molecular weight (Mw) of polyisoprenes can be carried out by any method conventionally known to those skilled in the art. Advantageously, it can be carried out by multi-detection size exclusion chromatography (MD-SEC).

[0049] The determination of polyisoprene content can be carried out by any method conventionally known to those skilled in the art. Advantageously, it can be carried out by multi-detection size exclusion chromatography (MD-SEC).

[0050] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprenes M1 and M2 are 1,4 polyisoprenes.

[0051] In one embodiment, the plant extract according to the invention is characterized in that the polyisoprenes M1 and M2 are 1,4 polyisoprenes of cis-1,4 and / or trans 1,4 form.

[0052] The conformation of polyisoprenes can be determined by any method commonly known to those skilled in the art. Advantageously, it can be carried out by carbon-13 NMR analysis.

[0053] In one embodiment, the plant extract according to the invention is characterized in that it does not comprise cis-isoprene rubber with a mass average molecular weight between 1.4 and 2.5 MDa.

[0054] In one embodiment, the plant extract according to the invention is characterized in that it does not comprise polyisoprenes with a mass average molecular mass (Mw) greater than 1 MDa.

[0055] In one embodiment, the plant extract according to the invention is characterized in that it does not comprise polyisoprenes with a mass average molecular mass (Mw) greater than 750 kDa.

[0056] In one embodiment, the plant extract according to the invention is characterized in that it does not comprise polyisoprenes with a mass average molecular mass (Mw) greater than 650 kDa.

[0057] Triterpene alcohols tend to precipitate at low temperatures, which can destabilize emulsions, cloud liquid formulations, particularly cosmetics, such as serums, shampoos, and styling products, and also make emulsions grainy, thus negatively affecting the sensory properties of the formulations. Similarly, these compounds can alter rheological and stability properties through the formation of oxidized products, which over time can also lead to discoloration of the formulations (browning) and / or skin intolerance issues.

[0058] The applicant also succeeded, quite surprisingly and unexpectedly, in developing a plant extract whose low content of triterpenic alcohols avoids all the problems mentioned above.

[0059] In one embodiment, the plant extract according to the invention is characterized in that it comprises less than 1% of triterpenic alcohols.

[0060] The measurement of triterpene alcohol content can be carried out by all the methods classically used by a person skilled in the art.

[0061] According to one embodiment of the invention, the measurement of the triterpene alcohol content is carried out by gas chromatography GC-FID.

[0062] In one embodiment, the plant extract according to the invention is characterized in that the mass content of triterpenic alcohols is within a range of 0.01% to 1% (w / w) relative to the total mass of the plant extract.

[0063] In one embodiment, the plant extract according to the invention is characterized in that the mass content of triterpenic alcohols is within a range of 0.05% to 0.5% (w / w) relative to the total mass of unsaponifiables of the plant extract.

[0064] In one embodiment, the plant extract according to the invention is characterized in that the mass content of triterpenic alcohols is less than 0.1% (w / w) relative to the total mass of the plant extract.

[0065] In one embodiment, the plant extract according to the invention is characterized in that it further comprises soaps.

[0066] In one embodiment, the plant extract according to the invention is characterized in that the mass content of soaps and mineral ash is within a range of 0% to 7% (w / w) relative to the total mass of the plant extract.

[0067] In one embodiment, the plant extract according to the invention is characterized in that the mass content of soaps and mineral ash is within a range of 0.01% to 5% (w / w) relative to the total mass of the plant extract.

[0068] In one embodiment, the plant extract according to the invention is characterized in that the mass content of soaps and mineral ash is within a range of 0.05% to 3% (w / w) relative to the total mass of the plant extract.

[0069] In one embodiment, the plant extract according to the invention is characterized in that the mass content of soaps and mineral ash is within a range of 0.1% to 1% (w / w) relative to the total mass of the plant extract.

[0070] The low content of soaps and mineral ash in the plant extract according to the invention has the advantage of making it more easily soluble in the oily phases of compositions, particularly cosmetics, and of reducing skin tolerance problems, in particular skin irritation and corrosivity.

[0071] When the plant extract according to the invention is dispersed in water to be processed in an extruder in order to be hot-dried and shaped into an extruded form, the low soap content reduces the foam formation which makes it difficult to dry and shape the extract according to the invention.

[0072] In one embodiment, the plant extract according to the invention is characterized in that its acid value is within a range from 0.01 mg KOH / g to 10 mg KOH / g.

[0073] In one embodiment, the plant extract according to the invention is characterized in that its acid value is within a range from 0.1 mg KOH / g to 5 mg KOH / g.

[0074] The determination of the acid value can be carried out by any method commonly known to those skilled in the art. Advantageously, it can be carried out according to a method adapted from the NF EN ISO 660 method.

[0075] In one embodiment, the plant extract according to the invention is characterized in that its saponification index is within a range from 0.1 mg KOH / g to 30 mg KOH / g.

[0076] In one embodiment, the plant extract according to the invention is characterized in that its saponification index is within a range from 0.5 mg KOH / g to 10 mg KOH / g.

[0077] In one embodiment, the plant extract according to the invention is characterized in that its saponification index is within a range from 1 mg KOH / g to 5 mg KOH / g.

[0078] In one embodiment, the plant extract according to the invention is characterized in that its saponification index is within a range of 2 mg KOH / g to 3 mg KOH / g.

[0079] The saponification value can be determined using any method commonly known to those skilled in the art. Advantageously, it can be determined using a method adapted from the NF ISO 3657 standard.

[0080] In one embodiment, the plant extract according to the invention is characterized in that its iodine value is within a range from 200 gb / 100g to 400 g I2 / 100g.

[0081] In one embodiment, the plant extract according to the invention is characterized in that its iodine value is within a range from 250 gb / 100g to 350 g I2 / 100g.

[0082] The iodine value can be determined by any conventional method known to those skilled in the art. Advantageously, it is determined according to a method adapted from the NF ISO 3961 method.

[0083] In one embodiment, the plant extract according to the invention is characterized in that its melting temperature measured by DSC is within a range of 20°C to 100°C.

[0084] In one embodiment, the plant extract according to the invention is characterized in that its melting temperature measured by DSC is within a range of 30°C to 90°C.

[0085] In one embodiment, the plant extract according to the invention is characterized in that its melting temperature measured by DSC is within a range of 40°C to 80°C.

[0086] In one embodiment, the plant extract according to the invention is characterized in that its melting temperature measured by DSC is within a range of 50°C to 70°C.

[0087] In one embodiment, the plant extract according to the invention is characterized in that its melting temperature measured by DSC is within a range of 50°C to 60°C.

[0088] The low melting temperature of the extract according to the invention has the advantage of making it easier to implement for the manufacture of compositions, particularly cosmetics.

[0089] In one embodiment, the plant extract according to the invention is characterized in that it is obtained from one of the plants chosen from the group comprising: Vitellaria paradoxa, Palaquium gutta, Hevea brasiliensis, Hevea benthamania, Hevea guianensis, Parthenium argentatum, Kz dandelion, Eucommia ulmoides, Ficus carica, Artocarpus heterophyllus, Argania spinosa and / or Euphorbia macroclada.

[0090] In one embodiment, the plant extract according to the invention is characterized in that the plant extract is obtained from Vitellaria paradoxa, also known as Butyrospermum parkii.

[0091] In one embodiment, the plant extract is obtained from shea butter (INCI Code: BUTYROSPERMUM PARKII BUTTER).

[0092] In one embodiment, the plant extract is obtained from a fraction of shea butter.

[0093] For the purposes of the present invention, "shea butter" means raw, semi-refined or refined shea butter.

[0094] For the purposes of the present invention, "shea butter fraction" means any compound obtained from the fractionation of shea butter.

[0095] For the purposes of the present invention, "fractionation of shea butter" means at least one processing step of raw, semi-refined or refined shea butter using an organic solvent.

[0096] For the purposes of the present invention, "raw shea butter" means unrefined butter obtained by simple mechanical pressing of the kernels or by extraction with a solvent, for example hexane.

[0097] For the purposes of this invention, "semi-refined shea butter" means butter that has undergone at least one neutralization or degumming step. bleaching on bleaching earth in the presence or absence of activated carbon and / or neutralizing or non-neutralizing deodorization.

[0098] For the purposes of this invention, "refined shea butter" means butter that has undergone physical or chemical refining. Chemical refining means butter that has undergone the steps of neutralization in the presence of a base, degumming, bleaching on bleaching earth with or without activated carbon, and deodorization. Physical refining means butter that has undergone the steps of degumming, bleaching on bleaching earth with or without activated carbon, and neutralizing deodorization.

[0099] The fractionation of shea butter is carried out with at least one solvent chosen from the list including acetone, methyl-THF, ethyl acetate, butyl acetate, dodecane, alpha and beta pinene, limonene, hexane, pinane, adamanthane, dichloromethane, dichloroethane, methyl isobutyl ketone and / or isopropanol and leads to the olein and stearin fractions and a precipitate. [000100] This precipitate, which is usually not valued, is the raw material which will allow the preparation of the fraction according to the invention; in the remainder of this application it will be referred to as "precipitate from the shea butter fractionation process". [000101] In one embodiment, the plant extract according to the invention is the co-product of the saponification of the precipitate from the shea butter fractionation process. [000102] In one embodiment, the plant extract according to the invention is obtained by a process not comprising a treatment step with ethanol, nor with a solvent from the family of linear, branched and / or cyclic alkanes, and / or from the family of aromatic compounds of the precipitate resulting from the fractionation of shea butter. [000103] In one embodiment, the plant extract according to the invention is obtained by a process not comprising a treatment step with a solvent from the family of linear, branched and / or cyclic alkanes, and / or from the family of aromatic compounds of the precipitate resulting from the fractionation of shea butter. [000104] In one embodiment, the plant extract according to the invention is obtained by a process not comprising a treatment step with a solvent from the family of linear, branched and / or cyclic alkanes. [000105] In one embodiment, the plant extract according to the invention is obtained by a process not comprising a solvent treatment step of the precipitate from the fractionation process of shea butter. [000106] In one embodiment, the plant extract according to the invention is hydrogenated. [000107] For the purposes of the present invention, "hydrogenated" means an extract that has undergone at least one hydrogenation reaction. [000108] In one embodiment, the hydrogenation of the plant extract according to the invention is carried out in an organic solvent in the presence of at least one homogeneous or heterogeneous metallic catalyst, comprising at least one hydrogenating metal included in the group of nickel, copper, cobalt, platinum, ruthenium, rhenium and / or palladium. [000109] In one embodiment, the hydrogenation reaction is carried out under a hydrogen pressure greater than 1 bar. [000110] In one embodiment, the hydrogenation reaction is carried out at a temperature above 60°C. [000111] In one embodiment, the plant extract according to the invention is hydrogenated and has an iodine value less than or equal to 60 gh / 100g. [000112] In one embodiment, the plant extract according to the invention is treated with an alcohol. [000113] For the purposes of the present invention, "treated with an alcohol" means an extract which has undergone at least one washing step in the presence of an alcohol comprising 1 to 22 carbon atoms. [000114] Preferably, the extract treated with alcohol is treated with ethanol in an extract / alcohol mass ratio of 0.01 to 100. The alcohol wash may comprise one or more washes, at a temperature of 20 to 250°C. The wash is carried out in batch mode or continuously against the current. [000115] Another object according to the present invention relates to a composition comprising a plant extract according to the invention. [000116] In one embodiment, the composition according to the invention is characterized in that the mass content of the plant extract according to the invention is within a range from 1.10 -3 % to 99% (w / w) relative to the total mass of the composition. [000117] In one embodiment, the composition according to the invention is characterized in that the mass content of the plant extract according to the invention is within a range from 1.10 -2% to 50% (w / w) relative to the total mass of the composition. [000118] In one embodiment, the composition according to the invention is characterized in that the mass content of plant extract according to the invention is within a range of 0.1% to 35% (w / w) relative to the total mass of the composition. [000119] In one embodiment, the composition according to the invention is characterized in that the mass content of plant extract according to the invention is within a range of 0.5% to 20% (w / w) relative to the total mass of the composition. [000120] In one embodiment, the composition according to the invention is characterized in that the mass content of plant extract according to the invention is within a range of 1% to 15% (w / w) relative to the total mass of the composition. [000121] In one embodiment, the composition according to the invention is characterized in that the mass content of plant extract according to the invention is within a range of 2% to 10% (w / w) relative to the total mass of the composition. [000122] In one embodiment, the composition according to the invention is a cosmetic or pharmaceutical composition, in particular a dermatological one. [000123] In one embodiment, the composition according to the invention is a cosmetic composition. [000124] In one embodiment, the composition according to the invention is a cosmetic composition and further comprises at least one cosmetically acceptable excipient. [000125] In one embodiment, the composition according to the invention is a pharmaceutical composition. [000126] In one embodiment, the composition according to the invention is a pharmaceutical composition and further comprises at least one pharmaceutically acceptable excipient. [000127] In one embodiment, the composition according to the invention is a dermatological composition. [000128] In one embodiment, the composition according to the invention is a dermatological composition and further comprises at least one dermatologically acceptable excipient. [000129] According to the present invention, "cosmetic composition" means a non-therapeutic composition, that is to say, a composition intended for the prevention and / or care of healthy skin, including a healthy scalp, and / or healthy hair and / or healthy mucous membranes. [000130] According to the present invention, "healthy skin," "healthy skin appendages," or "healthy mucous membranes" means any area of ​​skin and / or skin appendage and / or mucous membrane deemed non-pathological by a dermatologist, that is, which does not present any infection, inflammation, scar, disease, or skin condition such as folliculitis, candidiasis, psoriasis, ichthyosis, or pathologies related to melanogenesis. such as vitiligo, eczema, acne, actinic keratosis, carcinoma, melanoma, boil or dermatitis, including seborrheic dermatitis, alopecia or sores or injuries. [000131] For the purposes of the present invention, "phanera" refers to integumentary structures derived from the ectoderm that are characterized by a high degree of keratinization. Thus, phanera do not include the skin or mucous membranes. In humans, the principal phanera are hair, body hair, and nails. [000132] In one embodiment, the composition according to the invention further comprises at least one bio-based ingredient included in the group comprising: alkanes, natural or synthetic waxes, fatty esters of vegetable oils, blown and / or polymerized and / or hydrogenated and / or polyhydroxylated vegetable oils, fatty acid esters, monoglycerides, diglycerides, triglycerides, fatty acid soaps, natural polymers, synthetic polymers, fatty alcohols, free phytosterols / stanols, esterified phytosterols / stanols, free triterpenic alcohols, esterified free triterpenic alcohols and / or glycol fatty esters. [000133] The composition thus obtained is a bio-based composition. [000134] For the purposes of the present invention, "bio-based ingredient" or "bio-based composition" means a compound or composition comprising at least 95% bio-based carbon, as determined by ASTM D6866-12 (Standard Test Methods for Determining the Biobased Content of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis). [000135] In one embodiment, the composition according to the invention is a homogeneous mixture. [000136] In one embodiment, the composition according to the invention has the characteristics of a eutectic mixture. [000137] In one embodiment, the composition according to the invention further comprises at least one ingredient having a refractive index at 20°C of 1.5000 to 1.5200. [000138] Mixing the extract according to the invention with an ingredient having a substantially identical refractive index, in this case from 1.5000 to 1.5200 at 20°C, has the advantage of rendering the mixture translucent. The mixture thus formed is therefore more easily formulated, particularly in cosmetics. [000139] Ingredients having a refractive index of 1.5000 to 1.5200 at 20°C may in particular be chosen from the group including: poly(2-chloroethyl methacrylate), poly(cyclohexyl methacrylate), polyisobutene, poly(2-hydroxyethyl methacrylate), poly(tetrahydrofurfuryl methacrylate), poly(acrylic acid), poly(acrylonitrile), poly(methyl isopropenyl ketone) and / or polyisoprene. [000140] In one embodiment, the composition according to the invention further comprises at least one other polyisoprene. [000141] In one embodiment, the composition according to the invention further comprises at least one ingredient selected from the group comprising: antioxidants, surfactants, sunscreens and / or preservatives. [000142] In one embodiment, the composition according to the invention further comprises at least one ingredient of fossil origin included in the group comprising: alkanes, mineral oils, microcrystalline waxes, paraffins, paraffin waxes, liquid paraffins and / or oily paraffins, petrolatum, Vaseline, soft waxes, ozokerites, Fisher Tropsch waxes, synthetic waxes, synthetic fatty alcohols, synthetic fatty acids and / or polymers. [000143] According to the invention, "paraffin" means an alkane or a mixture of alkanes, in particular linear alkanes, isoalkanes (or branched alkanes), cycloalkanes and naphthenes, MOSH (Mineral Oil Saturated Hydrocarbons) with a carbon number greater than 18, mono- or polycyclic aromatic hydrocarbons known as MOAH (Mineral Oil Aromatic Hydrocarbons) with a carbon number greater than 10. [000144] In one embodiment, the composition according to the invention further comprises at least one compound selected from the group comprising: non-volatile oils, glossy oils, pasty fats, gelling agents, film-forming polymers, waxes, antioxidants, pigments, colorants, surfactants, emulsifiers, an aqueous phase, or mixtures thereof. [000145] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one non-volatile oil. [000146] For the purposes of this invention, "non-volatile oil" means an oil having a flash point above 110°C measured according to the ATSM D93 standard. [000147] These oils may be of vegetable, mineral or synthetic origin. [000148] These non-volatile oils can be hydrocarbon, silicone, fluorinated or fluorosiliconized oils. [000149] For the purposes of the present invention, hydrocarbon oil means an oil essentially made up of carbon atoms, hydrogen and possibly oxygen and / or nitrogen atoms. [000150] Among these hydrocarbon oils, we can mention linear or branched alkanes of mineral or synthetic origin such as linear or branched alkanes of 17 to 40 carbon atoms, (poly)esters and (poly)ethers, and in particular (poly)esters of C2-C24 acids (preferably C6-C20), triglycerides of fatty acids in C6-C20, vegetable oils, dialkyl carbonates, branched and / or unsaturated fatty acids, branched and / or unsaturated fatty alcohols. [000151] Regarding non-volatile silicone oils, they are in particular chosen from the group including phenyl silicone oils, non-volatile polydimethylsiloxanes, or derivatives of non-volatile polydimethylsiloxanes and their mixtures. [000152] In one embodiment, the composition according to the invention is characterized in that the non-volatile oil is chosen from the group comprising non-volatile linear or branched alkanes. [000153] In one embodiment, the non-volatile oil is chosen from the group consisting of linear or branched alkanes of 17 to 40 carbon atoms. [000154] In one embodiment, the non-volatile oils are of vegetable origin. [000155] In one embodiment, the composition according to the invention is characterized in that the non-volatile oil is a vegetable hydrocarbon oil. [000156] Vegetable hydrocarbon oils are in particular selected from the group comprising: wheat germ oil, sunflower oil, grape seed oil, sesame oil, coconut oil, apricot kernel oil, castor oil, corn oil, avocado oil, soybean oil, shea (shea olein) oil, olive oil, sweet almond oil, cottonseed oil, palm oil, macadamia oil, rapeseed oil, jojoba oil, hazelnut oil, poppy seed oil, alfalfa oil, pumpkin seed oil, blackcurrant seed oil, squash seed oil, evening primrose oil, barley oil, and mixtures thereof. [000157] In one embodiment, the composition according to the invention is characterized in that the mass content of the non-volatile oil is at least 5% (w / w) relative to the total mass of the composition. [000158] In one embodiment, the composition according to the invention is characterized in that the mass content of the non-volatile oil is at least 10% (w / w) relative to the total mass of the composition. [000159] In one embodiment, the composition according to the invention is characterized in that the mass content of the non-volatile oil is within a range of 5% to 25% (w / w) relative to the total mass of the composition. [000160] In one embodiment, the composition according to the invention is characterized in that the mass content of the non-volatile oil is within a range of 5% to 15% (w / w) relative to the total mass of the composition. [000161] In one embodiment, the composition according to the invention is characterized in that the mass content of the non-volatile oil is within a range of 10% to 25% (w / w) relative to the total mass of the composition. [000162] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one gloss oil. [000163] For the purposes of the present invention, "gloss oil" means an oil possessing intrinsic gloss properties. "Gloss oils" are frequently used in cosmetics to guarantee a "shiny effect" when applying compositions to keratinous materials, for example. [000164] In one embodiment, the composition according to the invention is characterized by the brilliant oil being a non-volatile oil. [000165] In one embodiment, the composition according to the invention is characterized in that the gloss oil is selected from the group comprising: [000166] - polymers such as: polybutylenes in particular POLYBUTENE® marketed or manufactured by the company ATAMAN, hydrogenated polyisobutylenes, polydecenes and hydrogenated polydecenes, polyfarnesenes, vinylpyrrolidone copolymers in particular the vinylpyrrolidone / eicosene copolymer, ANTARON V 220 ® marketed or manufactured by the company ISP. [000167] - esters such as linear fatty acid esters having a total number of carbons greater than 30, aromatic esters, fatty alcohol esters or branched fatty acid esters having 20 to 30 carbon atoms. [000168] - ester copolymers such as: dilinoleyl dimer dilinoleate (LUSPLAN DD-DA5® and LUSPLAN DD-DA7®), dilinoleic acid / butanediol copolymer (VISCOPLAST 14436H®), dilinoleic acid / propanediol copolymer and their mixtures. [000169] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is at least 2% (w / w) relative to the total mass of the composition. [000170] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is at least 5% (w / w) relative to the total mass of the composition. [000171] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is between 2% and 20% (w / w) relative to the total mass of the composition. [000172] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is between 5% and 15% (w / w) relative to the total mass of the composition. [000173] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is between 10% and 20% (w / w) relative to the total mass of the composition. [000174] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is between 2% and 10% (w / w) relative to the total mass of the composition. [000175] In one embodiment, the composition according to the invention is characterized in that the mass content of the bright oil is between 5% and 10% (w / w) relative to the total mass of the composition. [000176] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one pasty fat body. [000177] For the purposes of the present invention, "pasty fat" means a lipophilic fatty compound with reversible solid / liquid phase change, having at room temperature (25°C) a liquid fraction and a solid fraction. [000178] In other words, the melting temperature of the pasty fat is less than or equal to 25°C. [000179] In one embodiment, the composition according to the invention is characterized in that the pasty fat is chosen from the group comprising synthetic pasty fats, animal pasty fats, vegetable pasty fats and mixtures thereof. [000180] In one embodiment, the composition according to the invention is characterized in that the pasty fat is a synthetic pasty fat selected from the group comprising: polyol ethers, petrolatum, vinyl polymers, esters of pentaerythritol, erythritol and trimethylolpropane, polyesters and mixtures thereof. [000181] In one embodiment, the composition according to the invention is characterized in that the animal pasty fat is lanolin. [000182] In one embodiment, the composition according to the invention is characterized in that the vegetable fat paste is chosen from the group comprising: vegetable butters, monoglycerides, diglycerides and triglycerides of fatty acids and their derivatives, and their mixtures. [000183] In one embodiment, the composition according to the invention is characterized in that the mass content of the pasty fat is between 0% and 20% (w / w) relative to the total mass of the composition. [000184] In one embodiment, the composition according to the invention is characterized in that the mass content of the pasty fat is between 0% and 15% (w / w) relative to the total mass of the composition. [000185] In one embodiment, the composition according to the invention is characterized in that the mass content of the pasty fat is between 0% and 10% (w / w) relative to the total mass of the composition. [000186] In one embodiment, the composition according to the invention is characterized in that the mass content of the pasty fat is between 0% and 5% (w / w) relative to the total mass of the composition. [000187] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one gelling agent. [000188] Furthermore, certain gloss oils such as VISCOPLAST 14436H®, and compounds marketed under the name LUSPLAN DD-DA5® and LUSPLAN DD-DA7® can also be used as gelling agents. [000189] In one embodiment, the composition according to the invention further comprises at least one citric ester. [000190] In one embodiment, the composition according to the invention further comprises at least one citric ester selected from the group comprising: triethyl citrate and / or tributyl citrate. [000191] In one embodiment, the composition according to the invention further comprises at least one glyceride. [000192] In one embodiment, the composition according to the invention further comprises at least one glyceride: glyceryl caprylate / caprate, propanediol dicaprylate and / or propylene glycol dicaprylate / dicaprate. [000193] In one embodiment, the composition according to the invention further comprises at least one vegetable oil or derivative selected from the group comprising: jojoba oil, squalane, high oleic sunflower oil, castor oil, shea olein, shea butter, hydrogenated castor oil, carnauba wax and / or candelilla wax. [000194] In one embodiment, the composition according to the invention further comprises at least one mineral and derivative selected from the group comprising: polybutene, polyethylene, liquid paraffin, petroleum jelly (or petrolatum) and / or isohexadecane. [000195] In one embodiment, the composition according to the invention further comprises at least one heavy ester selected from the group comprising: diisopropyl adipate, diisopropyl sebacate, neopentyl glycol diethylhexanoate, neopentyl glycol dicaprate, diisostearyl fumarate, diisostearyl malate, diisopropyl dilinoleate dimer, cetyl ethylhexanoate, isopropyl isostearate, isostearyl neopentanoate, isocetyl stearate, lauryl lactate, pentaerythritol tetraisostearate, ethylhexyl polyhydroxystearate, neopentyl glycol diheptanoate and / or dipentaerythritol hexacaprylate / hexacaprate. [000196] In one embodiment, the composition according to the invention further comprises at least one fatty acid ester selected from the group comprising: caprylic / capric triglyceride, cocoglycerides, dibutyl adipate, propylheptyl caprylate, dipropylheptyl carbonate, dicaprylyl carbonate, caprylyl caprylate / caprate, isostearyl isostearate, ethylhexyl cocoate, diisopropyl sebacate, isostearyl palmitate, triheptanoin, ethylhexyl palmitate, triethylhexanoin, polyglyceryl-3 diisostearate. [000197] In one embodiment, the composition according to the invention further comprises at least one synthetic fatty ester of which at least one carbon chain is comprised of between 11 and 30 carbon atoms, fatty acid monoesters, fatty acid diesters, dicarboxylic acid diesters, unsaturated dimerized acid diesters, alpha-hydroxy acid esters, branched polyester, branched polyglycolic esters. [000198] In one embodiment, the composition according to the invention is characterized in that the gelling agent is chosen from the group comprising: organic gelling agents, mineral gelling agents, polymeric gelling agents, and mixtures thereof. [000199] In one embodiment, the composition according to the invention is characterized in that the gelling agent is an organic gelling agent selected from the group comprising: ethylcellulose and its derivatives, resins derived from rosin, dextrin esters, fatty acid esters, and mixtures thereof. [000200] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a mineral gelling agent selected from the group comprising: hectorite and its derivatives, fumed silica and its derivatives, and mixtures thereof. [000201] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a polymeric gelling agent selected from the group comprising: organopolysiloxanes and their derivatives, dimethicone copolymers and their derivatives, polystyrene / polyisoprene copolymers, polystyrene / polybutadiene copolymers, polystyrene / copoly(ethylene-propylene) copolymers, polystyrene / copoly(ethylene-butylene) copolymers, mixtures of copolymers in isododecane such as ethylene / propylene copolymer or butylene / ethylene / styrene copolymer, polyesters and their derivatives, polyamide resins, and mixtures thereof. [000202] In one embodiment, the composition according to the invention is characterized in that the gelling agent is dextrin palmitate or one of its derivatives. [000203] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a modified hectorite of the BENTONE GEL ISD type V® or one of its equivalents. [000204] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a modified hectorite of the VEGELIGHT BENTONE SILK SB® type or one of its equivalents. [000205] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a modified hectorite of the disteardimonium hectorite type associated with triethyl citrate. [000206] In one embodiment, the composition according to the invention is characterized in that the gelling agent is a copolymer mixture in isododecane such as ethylene / propylene copolymer. [000207] In one embodiment, the composition according to the invention is characterized in that the gelling agent is the combination of a dimethicone polymer and a mixture of alkanes marketed under the name VEGELIGHT SILK SI 118® by BIOSYNTHIS, or one of its equivalents. [000208] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is at least 5% (w / w) relative to the total mass of the composition. [000209] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is at least 15% (w / w) relative to the total mass of the composition. [000210] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 5% and 30% (w / w) relative to the total mass of the composition. [000211] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 5% and 20% (w / w) relative to the total mass of the composition. [000212] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 15% and 30% (w / w) relative to the total mass of the composition. [000213] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 5% and 15% (w / w) relative to the total mass of the composition. [000214] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 15% and 25% (w / w) relative to the total mass of the composition. [000215] In one embodiment, the composition according to the invention is characterized in that the mass content of the gelling agent is between 20% and 30% (w / w) relative to the total mass of the composition. [000216] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one film-forming polymer. [000217] For the purposes of the present invention, a film-forming polymer is understood to be a polymer capable of forming a macroscopically continuous film, particularly on the lips, within the framework of our invention. [000218] In one embodiment, the composition according to the invention is characterized in that the film-forming polymer is selected from the group comprising: acrylic polymers, polyurethanes, polyesters, polyamides, silicone polymers. [000219] In one embodiment, the composition according to the invention is characterized in that the film-forming polymer is trimethylsilloxysilicate marketed under the name TMS 803. [000220] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is at least 1% (w / w) relative to the total mass of the composition. [000221] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is at least 10% (w / w) relative to the total mass of the composition. [000222] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is between 1% and 25% (w / w) relative to the total mass of the composition. [000223] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is between 10% and 25% (w / w) relative to the total mass of the composition. [000224] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is between 1% and 10% (w / w) relative to the total mass of the composition. [000225] In one embodiment, the composition according to the invention is characterized in that the mass content of the film-forming polymer is between 10% and 20% (w / w) relative to the total mass of the composition. [000226] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one wax. [000227] Waxes play an important role in the design of cosmetic products, particularly lipsticks, because they influence certain essential criteria such as the texture, appearance and / or solidity of the product. [000228] In the context of the present invention, "wax" means a lipophilic compound having a reversible solid / liquid change of state. In other words, the compound is solid at room temperature (25°C) and has a melting point greater than or equal to 30°C. [000229] In one embodiment, the waxes used have a melting point greater than or equal to 50°C. [000230] In one embodiment, the composition according to the invention is characterized in that at least one wax is chosen from the group comprising: synthetic waxes, mineral waxes, vegetable waxes and / or animal waxes. [000231] In one embodiment, the composition according to the invention is characterized in that the wax is a mineral wax or a synthetic wax selected from the group comprising: microcrystalline waxes, paraffins, ozokerite, polyethylene waxes, silicone waxes and / or fluorinated waxes. [000232] By "vegetable wax" is meant a composition comprising at least one partially or completely hydrogenated oil. These vegetable waxes may comprise esters of fatty acids and fatty alcohols, and may further comprise fatty acids, free fatty alcohols, long-chain linear alkanes and / or unsaponifiables. [000233] In one embodiment, the waxes used are vegetable waxes. [000234] In one embodiment, the composition according to the invention is characterized in that the wax is a vegetable or animal wax selected from the group comprising: lanolin wax, rice bran wax, carnauba wax, candelilla wax, berry wax, beeswax, sunflower wax, mimosa wax, jojoba wax, castor wax and / or olive wax. [000235] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is at least 2% (w / w) relative to the total mass of the composition. [000236] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is at least 5% (w / w) relative to the total mass of the composition. [000237] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is between 2% and 20% (w / w) relative to the total mass of the composition. [000238] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is between 5% and 15% (w / w) relative to the total mass of the composition. [000239] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is between 2% and 10% (w / w) relative to the total mass of the composition. [000240] In one embodiment, the composition according to the invention is characterized in that the mass content of the wax is between 5% and 10% (w / w) relative to the total mass of the composition. [000241] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one antioxidant. [000242] In one embodiment, the composition according to the invention is characterized in that the antioxidant is chosen from the group comprising: phenolic antioxidants of the type BHA, BHT, DBPC, gallates, so-called antioxidants natural antioxidants such as dl-alpha-tocopherol or its derivatives, tocotrienols, plant extracts, dibasic lipopeptides such as lysine or arginine, and mixtures thereof. [000243] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is at least 0.01% (m / m) relative to the total mass of the composition. [000244] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is at least 0.1% (w / w) relative to the total mass of the composition. [000245] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is between 0.01% and 2% (w / w) relative to the total mass of the composition. [000246] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is between 0.01% and 1% (w / w) relative to the total mass of the composition. [000247] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is between 0.1% and 1% (w / w) relative to the total mass of the composition. [000248] In one embodiment, the composition according to the invention is characterized in that the mass content of the antioxidant is between 0.01% and 0.1% (w / w) relative to the total mass of the composition. [000249] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one pigment part. [000250] This pigment portion allows for the coloring of the composition. [000251] In one embodiment, the composition according to the invention is characterized in that the pigment portion is selected from the group comprising: colorants and / or pigments. [000252] In one embodiment, the pigment portion comprises colorants. [000253] In one embodiment, the colorants are chosen from the group comprising: synthetic colorants and / or natural colorants. [000254] In one embodiment, the synthetic colorant is chosen from the group comprising: CI100006, CI12010, CI12085, CI12120, CI12370, CI12420, CI12490, CI14270, CI14700, CI14720, CI14815, CI15525, CI15580, CI15620, CI15630, CI15850, CI15865, CI15880, CI15980, CI15985, CI1035, CI16255, CI16290, CI17200, CI18050, CI45100, CI45220, CI45380, CI45430, CI77499, CI77267, CI77268, CI77266, CI50420, CI27755, CI28440, CI20470 and their mixtures. [000255] In one embodiment, the natural colorants are chosen from the group comprising: chlorophyll, anthocyanins, lycopene and / or turmeric. [000256] In one embodiment, the natural colorants are in their dehydrated forms. [000257] In one embodiment, the pigment part comprises pigments. [000258] In one embodiment, the pigments are chosen from mineral pigments, organic pigments and / or special effect pigments. [000259] In one embodiment, the pigments are mineral pigments. [000260] In one embodiment, the mineral pigments are chosen from the group comprising: iron oxide, zinc oxide, titanium dioxide, copper oxide, mica, magnesium silicate, aluminum silicate, iron silicate, chromium oxide, chromium hydrate, ultramarine, manganese violet, ultramarine blue, kaolin, barium sulfate, silica, talc, sodium aluminosilicate thiosulfates, bismuth oxychloride, copper phthalocyanine, chlorinated copper phthalocyanine, calcium aluminum borosilicate, tin oxide, magnesium oxide and / or aluminum oxide. [000261] In one embodiment, the pigments are organic pigments. [000262] In one embodiment, the organic pigments are chosen from the group comprising: aluminosilicate thiosulfate, fuchsin, mauveine, azo pigments, quinacridones, perylene, quinacridones, azo phthalocyanines, carmine and / or nitroso, nitro, xanthene, quinoline, anthraquinone, isoindolinone, isoindoline, quinacridone, perinone, diketopyrrolopyrrole, thioindigo, dioxazine, triphenylmethane and / or quinophthalone and / or lake pigments. [000263] For the purposes of the present invention, "lacquer pigments" means colorants associated with an inert mineral support which renders them insoluble. [000264] In one embodiment, the inert mineral support for the lacquer pigments is chosen from the group comprising: alumina, silica, calcium sodium borosilicate or calcium aluminium borosilicate, and aluminium. [000265] In one embodiment, the lacquer pigments are selected from the group comprising: D&C Red 21 (CI 45380), D&C Orange 5 (CI 45370), D&C Red 27 (CI 45410), D&C Orange 10 (CI 45425), D&C Red 3 (CI 45430), D&C Red 4 (CI 15510), D&C Red 33 (CI 17200), FD&C Yellow 5 (CI 19140), FD&C Yellow 6 (CI 15985), D&C Green 5 (CI 61570), D&C Yellow 10 (CI 77002), FD&C Green 3 (CI 42053) and / or FD&C Blue 1 (CI 42090). [000266] In one embodiment, the pigments are special effect pigments. [000267] In one embodiment, the special effect pigments are pearlescent pigments and / or glitter. [000268] In one embodiment, the composition according to the invention is characterized in that the mass content of pigments is at least 0.01% (w / w) relative to the total mass of the composition. [000269] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is at least 1% (w / w) relative to the total mass of the composition. [000270] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is at least 5% (w / w) relative to the total mass of the composition. [000271] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is between 0.01% and 20% (w / w) relative to the total mass of the composition. [000272] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 1% to 20% (w / w) relative to the total mass of the composition. [000273] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 5% to 20% (w / w) relative to the total mass of the composition. [000274] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 1% to 15% (w / w) relative to the total mass of the composition. [000275] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 5% to 15% (w / w) relative to the total mass of the composition. [000276] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 0.01% to 5% (w / w) relative to the total mass of the composition. [000277] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment part is within a range of 5% to 10% (w / w) relative to the total mass of the composition. [000278] In one embodiment, the composition according to the invention is characterized in that the mass content of the pigment portion is comprised in an interval of 10% to 15% (w / w) relative to the total mass of the composition. [000279] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one surfactant. [000280] For the purposes of the present invention, a surfactant is defined as a compound that modifies the surface tension between two surfaces or phases. Generally, these compounds are amphiphilic molecules and allow the solubilization of two immiscible phases of a composition. [000281] In one embodiment, the composition according to the invention is characterized in that the minimum surfactant is chosen from the group comprising non-ionic, cationic anionic and / or amphoteric surfactants. [000282] In one embodiment, the composition according to the invention is characterized in that the least surfactant is a non-ionic surfactant. [000283] In one embodiment, the composition according to the invention is characterized in that the minimum surfactant is selected from the group of non-ionic surfactants consisting of: polyoxyalkylene alkyl ethers, glycerin alkyl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, fatty alcohols, ethoxylated fatty alcohols, fatty acids, ethoxylated fatty acids, sorbitan esters, polysorbates, alkyl glucosides, glutamates, ethoxylated vegetable oils, polyglycerols, glycerol esters, sucrose esters, poloxamers, dimethicone copolyols, meroxapols, oxo-amines, alkanol amides, polyhydric alcohol esters and / or cocamines.In one embodiment, the fatty alcohols are chosen from the group comprising myristic alcohol (in particular the product LANETTE® 14 as marketed by BASF), behenyl alcohol (in particular the product LANETTE® 22 as marketed by BASF), cetearyl alcohol (in particular the product LANETTE® O as marketed by BASF), stearyl alcohol (in particular the product LANETTE® 18 as marketed by BASF), rhamnolipids and / or cetyl alcohol (in particular the product LANETTE® 16 as marketed by BASF). [000284] In one embodiment, the ethoxylated fatty alcohols are selected from the group comprising Oleth-10 (in particular the product BRU™ O10 as marketed by CRODA), Oleth-2 (in particular the product BRU™ 02 as marketed by CRODA), Ceteth-10 (in particular the product BRU™ CIO as marketed by CRODA), C12-13 Alketh-3 (in particular the product BRU™ LT3 as marketed by CRODA), Laureth-23 (in particular the product BRU™ L23 as marketed by CRODA), Oleth-3 (in particular the product BRU™ 02 as marketed by CRODA), Laureth-9 (including the product BRU™ L9 as marketed by CRODA), Steareth-2 (including the product BRU™ S2 as marketed by CRODA), Steareth-21 (including the product EUMULGIN® S21 as marketed by BASF), Ceteareth-25 (including the product EUMULGIN® B25 as marketed by BASF), Ceteareth-12 (including the product EUMULGIN® B1 as marketed by BASF), Ceteareth-20 (including the product EUMULGIN® B2 as marketed by BASF), Ceteareth-30 (including the product EUMULGIN® B3 as marketed by BASF), Beheneth-10 (including the product EUMULGIN® BA10 as marketed by BASF) and / or Beheneth-25 (including the product EUMULGIN® BA25 as marketed by BASF). [000285] In one embodiment, the fatty acids are chosen from the group comprising palmitic acid and stearic acid (in particular the product DUB 50 P as marketed by the company STEARINERIE DUBOIS) and / or stearic acid (in particular the product STEARIC ACID as marketed by the company GODREJ INDUSTRIES LIMITED). [000286] In one embodiment, the ethoxylated fatty acids are chosen from the group comprising PEG-2 Stearate (in particular the product HALLSTAR® DGMS as marketed by the company HALLSTAR) PEG-75 Stearate (in particular the product PRODHYBASE® 75 as marketed by the company Laboratoires Prod'Hyg. [000287] In one embodiment, the sorbitan esters are selected from the group comprising sorbitan laurate (in particular the product MONTANE™ 20 as marketed by SEPPIC), sorbitan stearate (in particular the product MONTANE™ 60 as marketed by SEPPIC), sorbitan isostearate (in particular the product MONTANE™ 70 as marketed by SEPPIC), sorbitan oleate (in particular the product MONTANE™ 80 VG as marketed by SEPPIC), sorbitan sesquioleate (in particular the product MONTANE™ 83 VG as marketed by SEPPIC), sorbitan tristearate (in particular the product SPAN™ 65 as marketed by CRODA), sorbitan trioleate (in particular the SPAN™ 85 product as marketed by CRODA),Sorbitan palmitate (in particular the product SPAN™ 40 as marketed by CRODA) and / or sorbitan olivate (in particular the product OLIVEM® 900 as marketed by HALLSTAR). [000288] In one embodiment, the polysorbates are selected from the group comprising polysorbate 20 (in particular the product MONTANOX™ 20 as marketed by SEPPIC), polysorbate 60 (in particular the product MONTANOX™ 60 as marketed by SEPPIC), polysorbate 65 (in particular the product TWEEN™ 65 as marketed by CRODA), the polysorbate 80 (in particular the MONTANOX™ 80 product as marketed by SEPPIC) and / or polysorbate 85 (in particular the TWEEN™ 85 product as marketed by CRODA). [000289] In one embodiment, the alkylglucosides are selected from the group comprising sodium lauryl glucose carboxylate and lauryl glucoside (in particular the product PLANTAPON® LGC SORB as marketed by BASF), caprylyl capryl glucoside (in particular the product PLANTACARE® 810 as marketed by BASF), lauryl glucoside (in particular the product PLANTACARE® 1200 as marketed by BASF), coco-glucoside (in particular the product PLANTACARE® 818 as marketed by BASF), decyl glucoside (in particular the product PLANTACARE® 2000 as marketed by BASF) and / or polyglyceryl-2 dipolyhydroxystearate (in particular the product DEHYMULS® PGPH as marketed by BASF).In one embodiment, the glutamates are chosen from the group comprising sodium stearoyl glutamate (in particular the product EUMULGIN® SG as marketed by BASF), sodium cocoyl glutamate (in particular the product PLANTAPON® ACG 50 as marketed by BASF), sodium myristoyl glutamate (in particular the product PROTELAN MGL-E as marketed by ZSCHIMMER & SCHWARZ) and / or sodium lauroyl glutamate (in particular the product PROTELAN AGL 95 PV-E as marketed by ZSCHIMMER & SCHWARZ).[000290] In one embodiment, the ethoxylated vegetable oils are chosen from the group comprising PEG-40 Hydrogenated Castor Oil (in particular the product EUMULGIN® CO 40 as marketed by BASF), PEG-60 Hydrogenated Castor Oil (in particular the product EUMULGIN® CO 60 as marketed by BASF) and / or PEG-40 Castor Oil (in particular the product EUMULGIN® RO 40 as marketed by BASF). [000291] In one embodiment, the polyglycerols are selected from the group comprising polyglyceryl-3 diisostearate (in particular the product LAMEFORM TGI as marketed by BASF), polyglyceryl-2 triisostearate (in particular the product CITHROL™ PG23IS as marketed by CRODA), polyglyceryl-3 diisostearate (in particular the product CITHROL™ PG32IS as marketed by CRODA), polyglyceryl-3 polyricinoleate (in particular the product CITHROL™ PG3PR as marketed by CRODA), PEG-30 dipolyhydroxystearate (in particular the product CITHROL™ DPHS as marketed by CRODA), PEG-20 glyceryl triisostearate (in particular the product CITHROL™ 10GTIS as marketed by BASF), and PEG-20 glyceryl triisostearate (in particular the product CITHROL™ 10GTIS as marketed by CRODA). marketed by CRODA), polyglyceryl-10 decaoleate (notably the product SYNETH™ 03 as marketed by LONZA), polyglyceryl-6 distearate (notably the product SYNETH™ S8 as marketed by the companyLONZA), polyglyceryl-10 stearate (including the product SYNETH™ S10 as marketed by LONZA), polyglyceryl-10 dipalmitate (including the product SYNETH™ Pli as marketed by LONZA), polyglyceryl-10 oleate (including the product SYNETH™ 013 as marketed by LONZA), polyglyceryl-10 caprylate / caprate (including the product SYNETH™ C15 as marketed by LONZA), polyglyceryl-10 laurate (including the product SYNETH™ L 15 as marketed by LONZA), polyglyceryl-2 stearate (and) glyceryl stearate (and) stearyl alcohol (including the product POLYAQUOL™ 2W as marketed by DKSH),polyglyceryl-4 laurate (and) polyglyceryl-6 laurate (including the product POLYAQUOL™ LW as marketed by INNOVACOS) and / or polyglyceryl-2 oleate (and) polyhydroxystearic acid (and) polyglyceryl-2 stearate (including the product POLYAQUOL™ OS2 as marketed by DKSH). [000292] In one embodiment, the glycerol esters are selected from the group comprising glyceryl stearate (in particular the product CITHROL™ GMS 40 as marketed by CRODA), glyceryl stearate SE (in particular the product CITHROL™ GMS 40 SE as marketed by CRODA), glyceryl distearate (in particular the product HALLSTAR® GDS as marketed by HALLSTAR), glyceryl oleate (in particular the product MONOMULS® 90-0 18 as marketed by BASF), glyceryl laurate (in particular the product MONOMULS® 90-L 12 as marketed by BASF) and / or cetyl stearate (in particular the product KESTER WAX K-56 RSPO as marketed by KOSTER KEUNEN). [000293] In one embodiment, the sucrose esters are chosen from the group comprising sucrose laurate (in particular the product SURFHOPE® C1216 as marketed by MITSUBISHI), sucrose myristate (in particular the product SURFHOPE® C1416 as marketed by MITSUBISHI), sucrose palmitate (in particular the product SURFHOPE® C1616 as marketed by MITSUBISHI) and / or sucrose stearate (in particular the product SURFHOPE® C1816 as marketed by MITSUBISHI). [000294] In one embodiment, the poloxamers are selected from the group comprising poloxamer 124 (in particular the product ADEKA NOL L-44 as marketed by DKSH), poloxamer 184 (in particular the product ADEKA NOL L-64 as marketed by DKSH), poloxamer 234 (in particular the product ADEKA NOL L-84 as marketed by DKSH), poloxamer 188 (in particular the product ADEKA NOL L-68 as marketed by DKSH), poloxamer 238 (in particular the product ADEKA NOL L-88 as marketed by DKSH), poloxamer 338 (in particular the product ADEKA NOL L-108 as marketed by DKSH), poloxamer 407 (in particular the product SYBPERONIC™ PE / F127 as marketed by CRODA) and / or poloxamer 182 (in particular the product SYBPERONIC™ PE / L62 as marketed by CRODA). [000295] In one embodiment, the dimethicone copolyols are selected from the group comprising PEG-12 Dimethicone (in particular DOWSIL™ ES-5373 as marketed by DOW CHEMICAL), PEG / PPG-20 / 22 Butyl Ether Dimethicone (in particular KF-6012 as marketed by Shin-Etsu Silicones Europe BV), PEG-10 Dimethicone (in particular KF-6017 as marketed by Shin-Etsu Silicones Europe BV), PEG-3 Dimethicone (in particular KF-6015 as marketed by Shin-Etsu Silicones Europe BV), Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone (in particular KF-6038 as marketed by Shin-Etsu Silicones Europe BV), PEG-9 Polydimethylsiloxyethyl Dimethicone (in particular product KF-6028 as marketed by Shin-Etsu Silicones Europe BV)) and / or Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone (in particular product KF-6104 as marketed by Shin-Etsu Silicones Europe BV). [000296] In one embodiment, the cocamines are chosen from the group comprising cocamide DEA (in particular the product INCROMIDE™ CDEA as marketed by CRODA), cocamide MEA (in particular the product INCROMIDE™ CMEA as marketed by CRODA) and / or lauramide DEA (in particular the product INCROMIDE™ 716 as marketed by CRODA). [000297] In one embodiment, the polyhydric alcohol esters are chosen from the group comprising glycerol, polyglycerols, polyalkylene glycol, erythritol, trimethylolpropane, erythritol, glucose, xylitol, pentaerythritol, sorbitol, isosorbide, anhydrosorbitol and / or sucrose. [000298] In one embodiment, the alkanol-amides are chosen from the group comprising alcanoyl-n-methylglucamides, di / tri ethanolamide acylamides and / or ethoxylated acylmides. [000299] In one embodiment, the cationic surfactant is chosen from the group comprising quaternary ammonium compounds, lecithins, alkylimidazolines, alkylamines, ethoxylated amines, amino acid acyls [000300] In one embodiment, the quaternary ammonium compounds are selected from the group comprising Polyquaternium-7 (in particular the product DEHYQUART® CC 7 as marketed by BASF), Polyquaternium-16 (in particular the product LUVIQUAT® EXCELLENCE as marketed by BASF), cetearyl alcohol, and behentrimonium methosulfate (in particular the product INCROQUAT™ BEHENYL TMS as marketed by CRODA) and / or cetrimonium chloride (in particular the product DEHYQUART® A-CA as marketed by BASF). [000301] In one embodiment, the lecithins are chosen from the group comprising lecithin (in particular the product DS-SUN PC65 as marketed by Doosan Corporation). [000302] In one embodiment, the amino acid acyls are chosen from the group comprising capryloyl glycine and / or lauryl glycine [000303] In one embodiment, the amphoteric surfactant is selected from the group comprising alkyl betaines, cocoamidopropyl betaines, cocoamphoacetates, cocoamphodiacetates, alkyl amide amidopropyl n-oxides, and alkyl amidopropyl betaines. [000304] In one embodiment, the alkyl betaines are chosen from the group including coco-betaine (in particular the product DEHYTON® AB 30 as marketed by BASF). [000305] In one embodiment, the COCOAMIDOPROPYL BETAINES are chosen from the group including cocamidopropyl betaine (in particular the product DEHYTON® PK 45 as marketed by BASF). [000306] In one embodiment, COCOAMPHOACETATES AND COCOAMPHODIACETATES are selected from the group including Disodium Cocoamphodiacetate (in particular the product Dehyton® DC as marketed by BASF). [000307] In one embodiment, the composition according to the invention is characterized in that the least surfactant is an anionic surfactant. [000308] In one embodiment, the composition according to the invention is characterized in that the minimum surfactant is an anionic surfactant selected from the group consisting of: alkyl phosphates, polyoxyalkylene alkyl ether phosphates, sulfonates, alkyl sulfates, polyaspartates, sulfosuccinates, alkyl ether sulfates, fatty acid soaps, alkylsulfonates, acylated isethionates, taurine and / or methyl taurine sulfates, alkanolamide sulfates, imidazole sulfates and / or alkyl citrates. [000309] In one embodiment, the sulfosuccinates are chosen from the group comprising disodium cetearyl sulfosuccinate (in particular the product EUMULGIN® Prisma as marketed by BASF) and / or disodium laureth sulfosuccinate (in particular the product TEXAPON® SB 3 KC as marketed by BASF). [000310] In one embodiment, the alkyl sulfates are selected from the group comprising: sodium lauryl sulfate (in particular the product SULFETAL® C 90 POWDER as marketed by ZSCHIMMER & SCHWARZ), ammonium lauryl sulfate (in particular the product SULFETAL® LA as marketed by ZSCHIMMER & SCHWARZ) and / or sodium coco sulfate (in particular the product TEXAPON® K 30 UP as marketed by BASF). [000311] In one embodiment, the alkyl ethersulfates are chosen from the group comprising sodium laureth sulfate (in particular the product TEXAPON® NS70 as marketed by BASF) and / or ammonium laureth sulfate (in particular the product SULFOCHEM™ EA-2SB as marketed by LUBRIZOL). [000312] In one embodiment, the fatty acid soaps are chosen from the group comprising potassium cocoate (in particular the product SURFAVON® 869 as marketed by DKSH) and / or potassium cocoate (and) potassium olivate (in particular the product EURASOL® KCO as marketed by EOC GROUP). [000313] In one embodiment, the alkylsulfonates are chosen from the group comprising sodium C14-16 olefin sulfonate (in particular the product ALFANOX® 46 as marketed by KAO CHEMICALS), sodium dodecylbenzene sulfonate (in particular the product NANSA® HS 80 / S as marketed by INNOSPEC) and / or sodium C10-13 alkyl benzenesulfonate (in particular the product NANSA® HS 85 / S as marketed by INNOSPEC). [000314] In one embodiment, the acylated isethionates are chosen from the group comprising sodium lauroyl methyl isethionate (in particular the product ISELUX® LQ-CLR-SB as marketed by INNOSPEC) and / or sodium cocoyl isethionate (in particular the product SMARTSULFA® SCI 85 as marketed by UNIPROMA). [000315] In one embodiment, taurine and methyl taurine sulfates are selected from the group comprising sodium methyl lauroyl taurate (in particular the product PUREACT TR-L90 as marketed by INNOSPEC) and / or sodium methyl oleoyl taurate (in particular the product PUREACT MS-CG as marketed by INNOSPEC). [000316] In one embodiment, the ALKYL CITRATES are chosen from the group comprising glyceryl stearate citrate (in particular the product DRACORIN® CE F as marketed by the company SYMRISE). [000317] In one embodiment, the composition according to the invention is characterized in that the minimum surfactant is an amphoteric surfactant. [000318] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is at least 0.1 % (m / m) relative to the total mass of the composition. [000319] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is at least 5% (w / w) relative to the total mass of the composition. [000320] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is between 0.1% and 30% (w / w) relative to the total mass of the composition. [000321] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is between 5% and 15% (w / w) relative to the total mass of the composition. [000322] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one emulsifier. [000323] In one embodiment, at least one emulsifier is selected from the group comprising: cetearyl alcohol and ceteareth-33 (in particular SINNOWAX AO as marketed by CRODA), glyceryl stearate and cetearyl alcohol and stearic acid and sodium lauroyl glutamate (in particular PROTELAN ENS as marketed by ZSCHIMMER & SCHWARZ), glyceryl stearate and PEG-100 stearate (in particular ARLACEL 165 as marketed by CRODA), cetearyl alcohol and cetearyl glucoside (in particular MONTANOV™ 68 as marketed by SEPPIC), cetyl alcohol and glyceryl stearate and PEG-75 stearate and ceteth-20 and steareth-20 (in particular the EMULIUM® DELTA MB product as marketed by the company GATTEFOSSÉ),Glyceryl oleate and polyglyceryl-3-polyricinoleate and unsaponifiables of O / ea Europaea oil (in particular the ECOMULS 2 IN 1 product as marketed by NATURATEC). [000324] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is within a range of 0.1% and 80% (w / w) relative to the total mass of the composition. [000325] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is within a range of 0.5% and 50% (w / w) relative to the total mass of the composition. [000326] In one embodiment, the composition according to the invention is characterized in that the mass content of the at least surfactant is within a range of 1% and 20% (w / w) relative to the total mass of the composition. [000327] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one solar filter. [000328] In one embodiment, the solar filters are chosen from the group comprising: mineral solar filters and / or organic solar filters. [000329] In one embodiment, the mineral sunscreens are selected from the group comprising: zinc oxide, titanium dioxide, calcium carbonate, calcium phosphate (apatite), magnesium carbonate, calcium silicate, magnesium silicate, aluminum silicate, kaolin, talc, aluminum oxide, yellow iron oxide, cobalt titanate, cobalt violet, and / or silicon dioxide. [000330] In one embodiment, the mineral sunscreens are selected from the group comprising: zinc oxide and / or titanium dioxide. [000331] In one embodiment, the organic sunscreens are selected from the group comprising: camphor benzalkonium methosulfate, homosalate, benzophenone-3, phenylbenzimidazole sulfonic acid, terephthalylidene dicamphor sulfonic acid, butyl methoxydibenzoylmethane, benzylidene camphor sulfonic acid, octocrylene, polyacrylamidomethyl benzylidene camphor, ethylhexyl methoxycinnamate, PEG-25-PABA, isoamyl p-methoxycinnamate, ethylhexyl triazone, drometrizole trisiloxane, diethylhexyl butamido triazone, 4-methylbenzylidene camphor, ethylhexyl salicylate, ethylhexyl dimethyl PABA, benzophenone-4, the benzophenone-5, methylene bis-benzotriazolyl tetra-methylbutylphenol, disodium phenyl dibenzimidazole tetrasulfonate, bisethylhexyloxyphenol methoxyphenyl triazine, polysilicone-15 and / or diethylamino hydroxybenzoyl hexyl benzoate. [000332] In one embodiment, the composition according to the invention is characterized in that it further comprises at least one aqueous phase. [000333] In one embodiment, the composition according to the invention is characterized in that the aqueous phase consists of water. [000334] In one embodiment, the composition according to the invention is characterized in that the aqueous phase comprises water and at least one water-miscible organic solvent. [000335] In one embodiment, the composition according to the invention is characterized in that the aqueous phase comprises at least one water-miscible organic solvent selected from the group consisting of lower alcohols such as ethanol, isopropanol, butanol, isoamyl alcohol, glycols such as ethylene glycol, propylene glycol, 1,3-butylene glycol, ketones and short-chain aldehydes in the C2 to C4 range. [000336] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 1% and 95% (w / w) relative to the total mass of the composition. [000337] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 5% and 80% (w / w) relative to the total mass of the composition. [000338] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 5% and 60% (w / w) relative to the total mass of the composition. [000339] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 1% and 50% (w / w) relative to the total mass of the composition. [000340] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 1% and 30% (w / w) relative to the total mass of the composition. [000341] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 10 % and 40% (w / w) relative to the total mass of the composition. [000342] In one embodiment, the composition according to the invention is characterized in that the mass content of the aqueous phase is between 10 % and 20% (w / w) relative to the total mass of the composition. [000343] Another object according to the present invention relates to the use of the plant extract according to the invention to modify the rheology of a composition and / or as a gelling agent in a composition and / or as a thickening agent in a composition and / or to maintain and / or increase the stability of an emulsion and / or to maintain and / or increase the hydrophobic character of a composition and / or to maintain and / or increase the water resistance of a composition. [000344] Another object according to the present invention relates to the use of the plant extract according to the invention to modify the rheology of a composition. [000345] For the purposes of the present invention, "modifying the rheology of a composition" means any modification of the viscosity and / or plasticity and / or elasticity of the composition. [000346] In one embodiment, the modification of the rheology of the composition corresponds to maintaining and / or increasing the viscosity, and / or maintaining and / or increasing the plasticity, and / or maintaining and / or increasing the elasticity of the composition. [000347] In one embodiment, the modification of the rheology of the composition corresponds to an increase in viscosity by a factor of 0.01 to 100,000 compared to the viscosity of the composition before the addition of the extract according to the invention. [000348] In one embodiment, the modification of the rheology of the composition corresponds to an increase in plasticity by a factor of 0.01 to 100,000 compared to the plasticity of the composition before the addition of the extract according to the invention. [000349] In one embodiment, the modification of the rheology of the composition corresponds to an increase in elasticity by a factor of 0.01 to 100,000 compared to the elasticity of the composition before the addition of the extract according to the invention. [000350] Viscosity, plasticity and / or elasticity measurements may be carried out by all the methods classically used by a person skilled in the art. [000351] In one embodiment of the use of the plant extract according to the invention to modify the rheology of a composition, the composition is chosen from the group comprising an oily composition, a glycol, the oily phase of a composition. [000352] In an embodiment of the use of the plant extract according to the invention to modify the rheology of a composition characterized in that the composition is a cosmetic composition. [000353] In one embodiment of the use of the plant extract according to the invention to modify the rheology of a composition, the cosmetic composition is chosen from the group comprising: a depilatory wax, a lip product (pigmented or non-pigmented), an H / W or W / O emulsion, a varnish, a foundation, a sunscreen product and / or a product for the cosmetic treatment of eyelashes. [000354] In one embodiment, the use of the plant extract according to the invention to modify the rheology of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000355] In one embodiment, the use of the plant extract according to the invention to modify the rheology of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000356] In one embodiment, the use of the plant extract according to the invention to modify the rheology of a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000357] Another object according to the present invention relates to the use of the extract according to the invention as a gelling agent in a composition. [000358] For the purposes of the present invention, "gelling agent" means a compound which causes a change in viscosity by interaction between macromolecules and the formation of a three-dimensional network. [000359] In one embodiment, the use of the extract according to the invention as a gelling agent in a composition is characterized in that the composition is selected from the group comprising: a denatured ethyl alcohol, an isopropyl alcohol, a C6 to C44 fatty alcohol, a polyol, a glycol, a glycerol, a polyglycerol, a propylene glycol, a polyethylene glycol and / or a toothpaste composition. [000360] In one embodiment, the use of the extract according to the invention as a gelling agent in a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000361] In one embodiment, the use of the extract according to the invention as a gelling agent in a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000362] In one embodiment, the use of the extract according to the invention as a gelling agent in a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000363] An embodiment according to the invention relates to the use of a plant extract according to the present invention as a thickener in a composition. [000364] For the purposes of the present invention, "thickener" means a compound that modifies the viscosity of a composition, without interaction between the macromolecules. [000365] In one embodiment, the use of the plant extract according to the invention as a thickener in a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000366] In one embodiment, the use of the plant extract according to the invention as a thickener in a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000367] In one embodiment, the use of the plant extract according to the invention as a thickener in a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000368] Another object according to the present invention relates to the use of a plant extract according to the present invention to maintain and / or increase the stability of an emulsion. [000369] For the purposes of the present invention, "maintaining and / or increasing the stability of an emulsion" means maintaining a homogeneous mixture and / or preventing the emulsion from separating into its two constituent phases. [000370] In one embodiment, the use of the plant extract according to the invention to maintain and / or increase the stability of an emulsion is characterized in that the emulsions are oil-in-water emulsions. [000371] In one embodiment, the use of the plant extract according to the invention to maintain and / or increase the stability of an emulsion is characterized in that the emulsions are water-in-oil emulsions. [000372] In one embodiment, the use of the plant extract according to the invention to maintain and / or increase the stability of an emulsion is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the emulsion. [000373] In one embodiment, the use of the plant extract according to the invention to maintain and / or increase the stability of an emulsion is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the emulsion. [000374] In one embodiment, the use of the plant extract according to the invention to maintain and / or increase the stability of an emulsion is characterized in that the plant extract according to the invention is used at a mass content within the range of 1% to 20% (w / w) relative to the total mass of the emulsion. [000375] Another object according to the present invention relates to the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition. [000376] For the purposes of the present invention, "increasing the hydrophobic character of a composition" means decreasing the affinity of said composition with water. [000377] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the composition is intended to be applied to the skin and / or skin appendages, including hair. [000378] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the composition is a cosmetic composition. [000379] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the composition is chosen from the group comprising: a depilatory wax, a lip product (pigmented or non-pigmented), an H / W or W / O emulsion, a varnish, a foundation, a sunscreen product and / or a product for the cosmetic treatment of eyelashes. [000380] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000381] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000382] In one embodiment, the use of the extract of the invention to maintain and / or increase the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000383] Another object according to the present invention relates to the use of the extract of the invention to maintain and / or increase the water resistance of a composition. [000384] For the purposes of the present invention, "maintaining and / or increasing the water resistance of a composition" means maintaining and / or increasing the physical and / or chemical resistance of the composition to any aqueous solution and / or aqueous phase, in particular to bathing water and / or sweat. [000385] In one embodiment, the composition is a cosmetic composition. [000386] In one embodiment, the composition is chosen from the group comprising: a depilatory wax, a lip product (pigmented or not) pigmented), an H / W or W / O emulsion, a varnish, a foundation, a sunscreen and / or a product for the cosmetic treatment of eyelashes. [000387] In one embodiment, the use of the extract of the invention to maintain and / or increase the water resistance of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000388] In one embodiment, the use of the extract of the invention to maintain and / or increase the water resistance of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000389] In one embodiment, the use of the extract of the invention to maintain and / or increase the water resistance of a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000390] Another object according to the present invention relates to the use of the extract of the invention as substitutes and / or equivalents for fossil-derived paraffins, dimethicones, lanolin and / or petrolatum, glyceryl rosinate and / or natural waxes, in particular beeswax, carnauba and / or candelilla wax, in a composition. [000391] In one embodiment, the composition is a coating composition, an ink, a varnish, paper, cardboard, an adhesive, a candle, a plastic material, rubber, a food product, a cosmetic product and / or a pharmaceutical product. [000392] Another object according to the present invention relates to the use of the extract of the invention to substitute beeswax in a composition. [000393] In one embodiment, the use of the extract of the invention to substitute beeswax in a composition is characterized in that the composition further comprises at least one ingredient selected from the list including: vegetable oils, mineral oils, esterified oils and / or linear and / or branched alkanes from C10 to C40, trans esters of vegetable oils and synthetic fatty esters, vegetable waxes, such as carnauba wax, candelilla wax, rice wax or sunflower wax, vegetable butters, such as shea butter, mango butter or cocoa butter - fatty acids, fatty alcohols, glycerol esters, hydrogenated oils, rosins and their derivatives, such as Glyceryl Rosinate and / or paraffins. [000394] Another object according to the present invention relates to the use of the extract according to the invention to disperse solid particles in a composition. [000395] In one embodiment, the solid particles are dispersed in the oily phase of a composition. [000396] In one embodiment, the oily phase of the composition in which the particles are dispersed comprises at least one oil selected from the group comprising: vegetable oils, mineral oils, esterified oils, linear and / or branched alkanes from C10 to C40, trans esters of vegetable oils and / or synthetic fatty esters. [000397] In one embodiment, the oily phase of the composition in which the particles are dispersed comprises a vegetable oil. [000398] In one embodiment, the solid particles have a size in the range of 0.01 nm and 5000 microns. [000399] In one embodiment, the solid particles have a size in the range of 0.1 nm and 500 microns. [000400] In one embodiment, the solid particles have a size in the range of 1 nm to 50 microns. [000401] In one embodiment, the solid particles have a size in the range of 100 nm and 25 microns. [000402] In one embodiment, the mass content of solid particles is at least 0.01% (m / m) relative to the total mass of the composition. [000403] In one embodiment, the mass content of solid particles is at least 1% (m / m) relative to the total mass of the composition. [000404] In one embodiment, the mass content of solid particles is at least 5% (m / m) relative to the total mass of the composition. [000405] In one embodiment, the mass content of solid particles is within a range of 0.01% to 20% (m / m) relative to the total mass of the composition. [000406] In one embodiment, the mass content of solid particles is within a range of 1% to 20% (m / m) relative to the total mass of the composition. [000407] In one embodiment, the mass content of solid particles is within a range of 5% to 20% (m / m) relative to the total mass of the composition. [000408] In one embodiment, the mass content of solid particles is within a range of 1% to 15% (m / m) relative to the total mass of the composition. [000409] In one embodiment, the mass content of solid particles is within a range of 5% to 15% (m / m) relative to the total mass of the composition. [000410] In one embodiment, the mass content of solid particles is within a range of 0.01% to 5% (m / m) relative to the total mass of the composition. [000411] In one embodiment, the mass content of solid particles is within a range of 5% to 10% (m / m) relative to the total mass of the composition. [000412] In one embodiment, the mass content of solid particles is within a range of 10% to 15% (m / m) relative to the total mass of the composition. [000413] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 1000 to 1 / 1. [000414] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 100 to 1 / 50. [000415] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 20 to 1 / 5. [000416] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range from 1000 / 1 to 1 / 1. [000417] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 100 / 1 to 50 / 1. [000418] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 20 / 1 to 5 / 1. [000419] In one embodiment, the solid particles are chosen from the group comprising: sunscreens, colorants and / or pigments. [000420] In one embodiment, the solar filters are chosen from the group comprising: mineral solar filters and / or organic solar filters. [000421] In one embodiment, the mineral sunscreens are selected from the group comprising: zinc oxide, titanium dioxide, calcium carbonate, calcium phosphate (apatite), magnesium carbonate, calcium silicate, magnesium silicate, aluminium silicate, kaolin, talc, aluminium oxide, yellow iron oxide, cobalt titanate, cobalt violet and / or silicon oxide. [000422] In one embodiment, the mineral sunscreens are chosen from the group comprising: zinc oxide and / or titanium dioxide. [000423] In one embodiment, the colorants are chosen from the group comprising: synthetic colorants and / or natural colorants. [000424] In one embodiment, the synthetic colorant is selected from the group comprising: CI100006, CI12010, CI12085, CI12120, CI12370, CI12420, CI12490, CI14270, CI14700, CI14720, CI14815, CI15525, CI15580, CI15620, CI15630, CI15850, CI15865, CI15880, CI15980, CI15985, CI1035, CI16255, CI16290, CI17200, CI18050, CI45100, CI45220, CI45380, CI45430, CI77499, CI77267, CI77268, CI77266, CI50420, CI27755, CI28440, CI20470 and their mixtures. [000425] In one embodiment, the natural colorants are chosen from the group comprising: chlorophyll, anthocyanins, lycopene and / or turmeric. [000426] In one embodiment, the natural colorants are in their dehydrated forms. [000427] In one embodiment, the solid particles are pigments. [000428] In one embodiment, the pigments are chosen from mineral pigments, organic pigments and / or special effect pigments. [000429] In one embodiment, the pigments are mineral pigments. [000430] In one embodiment, the mineral pigments are chosen from the group comprising: iron oxide, zinc oxide, titanium dioxide, copper oxide, mica, magnesium silicate, aluminum silicate, iron silicate, chromium oxide, chromium hydrate, ultramarine, manganese violet, ultramarine blue, kaolin, barium sulfate, silica, talc, sodium aluminosilicate thiosulfates, bismuth oxychloride, copper phthalocyanine, chlorinated copper phthalocyanine, calcium aluminum borosilicate, tin oxide, magnesium oxide and / or aluminum oxide. [000431] In one embodiment, the pigments are organic pigments. [000432] In one embodiment, the organic pigments are chosen from the group comprising: aluminosilicate thiosulfate, fuchsin, mauveine, azo pigments, quinacridones, perylene, quinacridones, azo phthalocyanines, carmine and / or nitroso, nitro, xanthene, quinoline, anthraquinone, isoindolinone, isoindoline, quinacridone, perinone, diketopyrrolopyrrole, thioindigo, dioxazine, triphenylmethane and / or quinophthalone and / or lakes. [000433] For the purposes of the present invention, "lacquers" means colorants associated with an inert mineral support which renders them insoluble. [000434] In one embodiment, in lacquers, the mineral supports are chosen from the group comprising: alumina, silica, calcium sodium borosilicate or calcium aluminium borosilicate, and aluminium. [000435] In one embodiment, in the lacquers, the pigments are chosen from the group comprising: D&C Red 21 (CI 45380), D&C Orange 5 (CI 45370), D&C Red 27 (CI 45410), D&C Orange 10 (CI 45425), D&C Red 3 (CI 45430), D&C Red 4 (CI 15510), D&C Red 33 (CI 17200), FD&C Yellow 5 (CI 19140), FD&C Yellow 6 (CI 15985), D&C Green 5 (CI 61570), D&C Yellow 10 (CI 77002), FD&C Green 3 (CI 42053) and / or FD&C Blue 1 (CI 42090). [000436] In one embodiment, the pigments are special effect pigments. [000437] In one embodiment, the special effect pigments are pearlescent and / or glitter. [000438] Another object according to the present invention relates to the use of the extract according to the invention for the preparation of a cosmetic composition. [000439] Another object according to the present invention relates to a method for modifying the rheology of a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000440] In one embodiment, the method for modifying the rheology of a composition is characterized in that the composition is chosen from the group comprising an oily composition, a glycol, the oily phase of a composition. [000441] In one embodiment, the method for modifying the rheology of a composition is characterized in that the composition is a cosmetic composition. [000442] In one embodiment, the method for modifying the rheology of a composition is characterized in that the cosmetic composition is chosen from the group comprising: a depilatory wax, a lip product (pigmented or non-pigmented), an H / W or W / O emulsion, a varnish, a foundation, a sunscreen product and / or a product for the cosmetic treatment of eyelashes. [000443] In one embodiment, the method for modifying the rheology of a composition is characterized in that it comprises the addition in said composition of a plant extract according to the invention in a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000444] In one embodiment, the method for modifying the rheology of a composition is characterized in that it comprises adding to said composition, of a plant extract according to the invention in a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000445] In one embodiment, the method for modifying the rheology of a composition is characterized in that it comprises the addition in said composition of a plant extract according to the invention in a mass content within the range of 1% to 20% (w / w) relative to the total mass of the composition. [000446] Another object according to the present invention relates to a method of gelling a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000447] In one embodiment, the gelling process of a composition is characterized in that the composition is chosen from the group comprising: a denatured ethyl alcohol and / or an isopropyl alcohol and / or a C6 to C44 fatty alcohol and / or a polyol and / or a glycol and / or a glycerol and / or a polyglycerol and / or a propylene glycol and / or a polyethylene glycol. [000448] In one embodiment, the gelling process of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000449] In one embodiment, the gelling process of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000450] In one embodiment, the gelling process of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 1% to 20% (w / w) relative to the total mass of the composition. [000451] Another object according to the present invention relates to a method for thickening a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000452] In one embodiment, the process for thickening a composition is characterized in that the plant extract according to the invention is added at a mass content in the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000453] In one embodiment, the process for thickening a composition is characterized in that the plant extract according to the invention is added at a content mass within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000454] In one embodiment, the process for thickening a composition is characterized in that the plant extract according to the invention is added at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000455] Another object according to the present invention relates to a method for stabilizing an emulsion, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000456] In one embodiment, the process for stabilizing an emulsion is characterized in that the emulsions are oil-in-water emulsions. [000457] In one embodiment, the process for stabilizing an emulsion is characterized in that the emulsions are water-in-oil emulsions. [000458] In one embodiment, the method for stabilizing an emulsion is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the emulsion. [000459] In one embodiment, the method for stabilizing an emulsion is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the emulsion. [000460] In one embodiment, the method for stabilizing an emulsion is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the emulsion. [000461] Another object according to the present invention relates to a method for increasing the hydrophobic character of a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000462] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the composition is intended to be applied to the skin and / or skin appendages, in particular hair. [000463] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the composition is a cosmetic composition. [000464] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the composition is chosen from the group including: a nail polish, a foundation, a sunscreen and / or a product for the cosmetic treatment of eyelashes. [000465] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.1% to 80% (w / w) relative to the total mass of the composition. [000466] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content within the range of 0.5% to 50% (w / w) relative to the total mass of the composition. [000467] In one embodiment, the method for increasing the hydrophobic character of a composition is characterized in that the plant extract according to the invention is used at a mass content in the range of 1% to 20% (w / w) relative to the total mass of the composition. [000468] Another object according to the present invention relates to a method for dispersing solid particles in a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000469] In one embodiment, the solid particles are as previously defined. [000470] In one embodiment, the method for dispersing solid particles in a composition is characterized in that the mass content of solid particles is at least 0.01% (m / m) relative to the total mass of the composition. [000471] In one embodiment, the method for dispersing solid particles in a composition is characterized in that the mass content of solid particles is at least 1% (m / m) relative to the total mass of the composition. [000472] In one embodiment, the method for dispersing solid particles in a composition is characterized in that the mass content of solid particles is at least 5% (m / m) relative to the total mass of the composition. [000473] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 0.01% to 20% (m / m) relative to the total mass of the composition. [000474] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 1% to 20% (m / m) relative to the total mass of the composition. [000475] In one embodiment, the method for dispersing solid particles in a composition is characterized in that the mass content of particles solids is within a range of 5% to 20% (w / w) relative to the total mass of the composition. [000476] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 1% to 15% (m / m) relative to the total mass of the composition. [000477] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 5% to 15% (m / m) relative to the total mass of the composition. [000478] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 0.01% to 5% (m / m) relative to the total mass of the composition. [000479] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 5% to 10% (m / m) relative to the total mass of the composition. [000480] In one embodiment, the process for dispersing solid particles in a composition is characterized in that the mass content of solid particles is within a range of 10% to 15% (m / m) relative to the total mass of the composition. [000481] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 1000 to 1 / 1. [000482] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 100 to 1 / 50. [000483] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 1 / 20 to 1 / 5. [000484] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range from 1000 / 1 to 1 / 1. [000485] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 100 / 1 to 50 / 1. [000486] In one embodiment, the mass ratio between the content of solid particles and the mass content of extract according to the invention is within a range of 20 / 1 to 5 / 1. [000487] Another object according to the present invention relates to a process for substituting fossil-derived paraffins, dimethicones, lanolin and / or petrolatum, and / or natural waxes, in particular beeswax, carnauba and / or candelilla wax, in a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000488] Another object according to the present invention relates to a method of substituting beeswax in a composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000489] In one embodiment, the process of substituting beeswax in a composition is characterized in that it further comprises the addition of at least one ingredient selected from the list including: vegetable oils, mineral oils, esterified oils and / or linear and / or branched alkanes from C10 to C40, trans esters of vegetable oils and synthetic fatty esters, vegetable waxes, such as carnauba wax, candelilla wax, rice wax or sunflower wax, vegetable butters, such as shea butter, mango butter or cocoa butter - fatty acids, fatty alcohols, glycerol esters, hydrogenated oils, rosins and their derivatives, such as Glyceryl Rosinate and / or paraffins. [000490] Another object according to the present invention relates to a method for preparing a cosmetic composition, characterized in that it comprises the addition in said composition of a plant extract according to the invention. [000491] Another object according to the present invention relates to the use of the extract according to the invention as an excipient for the preparation of a pharmaceutical composition. [000492] Another object according to the present invention relates to the cosmetic use of a plant extract according to the invention as a cosmetic active ingredient. [000493] According to the present invention, "cosmetic use" means a non-therapeutic, non-pharmaceutical use of the extract according to the invention, on all or part of the healthy skin and / or healthy hair and / or healthy mucous membranes. [000494] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that the plant extract according to the invention is used as a cosmetic active ingredient to maintain and / or increase the hydration of healthy skin and / or healthy mucous membranes, in particular to maintain and / or reduce insensible water loss and / or to maintain and / or increase the water content of healthy skin and / or healthy mucous membranes, and / or to prevent and / or slow the appearance of signs of dry skin and / or mucous membranes. [000495] For the purposes of the present invention, "insensible water loss" means passive diffusion and insensible perspiration measured at the cutaneous or mucosal level. Also referred to as transepidermal water loss or TEWL, insensible water loss can be measured by various methods, including in vivo, particularly using an evaporimeter or a tewameter, in vitro, particularly using the open cylinder technique, and / or ex vivo according to methods conventionally used by those skilled in the art. [000496] For the purposes of this invention, "water content of the skin and / or mucous membranes" means the amount of water contained in the epithelia, in particular the epidermis and / or the epithelium of the mucous membranes. This content thus reflects the state of hydration. There are various methods for measuring the water content of the skin and / or mucous membranes, notably in vivo and in particular via the corneometer, and / or by measuring desquamation via the corneofix (corneometry), or in vitro, in particular via the measurement of dielectric conductivity according to the methods classically used by those skilled in the art. [000497] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that it is used as a cosmetic active ingredient to prevent and / or reduce wrinkles in healthy skin. [000498] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that it is used as a cosmetic active ingredient to mattify healthy skin. [000499] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that it is used as a cosmetic active ingredient to maintain and / or increase the radiance of healthy skin, in particular healthy lips and / or healthy hair and / or nails. [000500] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that it is used as a cosmetic active ingredient to smooth healthy hair. [000501] In one embodiment, the cosmetic use of the plant extract according to the invention is characterized in that it is used as a cosmetic active ingredient to fix and / or texture healthy hair. [000502] Another object according to the present invention relates to a cosmetic treatment process comprising the application to all or part of the healthy skin and / or healthy hair and / or skin appendages, and / or healthy hair of the extract according to the invention. [000503] In one embodiment, the cosmetic treatment process according to the invention is implemented to maintain and / or increase the hydration of healthy skin and / or healthy mucous membranes, in particular to maintain and / or decrease insensible water loss and / or to maintain and / or increase the water content of healthy skin and / or healthy mucous membranes, and / or to prevent and / or slow down the appearance of signs of dry skin and / or mucous membranes of healthy mucous membranes. [000504] In one embodiment, the cosmetic treatment process according to the invention is implemented to maintain and / or increase the radiance of healthy skin, particularly healthy lips and / or healthy hair and nails. [000505] In one embodiment, the cosmetic treatment process according to the invention is implemented to smooth healthy hair. [000506] In one embodiment, the cosmetic treatment process according to the invention is implemented to prevent and / or reduce wrinkles in healthy skin. [000507] In one embodiment, the cosmetic treatment process according to the invention is implemented to mattify healthy skin. [000508] Another object according to the present invention relates to the plant extract according to the invention for its therapeutic use. [000509] In one embodiment, the plant extract for its therapeutic use according to the invention is characterized in that it is used in the treatment of burned skin and / or mucous membranes and / or chapped skin and / or scabies and / or pityriasis alba and / or atopic dermatitis and / or ichthyosis. [000510] In one embodiment, the plant extract for its therapeutic use according to the invention is characterized in that it is used in the treatment of dryness of the skin or mucous membranes which accompany skin conditions and / or pathologies of the mucous membranes such as eczema, and / or to maintain or improve the hydration of the skin and / or mucous membranes of skin and / or mucous membranes which are damaged, sensitive, sensitized, altered, intolerant, fragile or reactive, and / or in the treatment of scaly conditions and / or itching related to dryness of the skin and / or mucous membranes. [000511] In one embodiment, the plant extract for its therapeutic use according to the invention is characterized in that it is used in the treatment of lice and / or parasites. [000512] In one embodiment, the plant extract for its therapeutic use according to the invention is characterized in that it is used in the treatment of lice and / or parasites, by an occlusive effect depriving of oxygen. [000513] In one embodiment, the plant extract for its therapeutic use according to the invention is characterized in that it is used to correct damage related to UV radiation. [000514] In one embodiment, the plant extract for its therapeutic use according to the invention as an SPF booster to prevent and / or correct damage related to UV radiation. [000515] For the purposes of the present invention, "SPF booster" means a formulation intended to increase sun protection against UVA and / or UVB rays in association with a chemical and / or mineral sunscreen. [000516] In one embodiment, the plant extract for its therapeutic use according to the invention as an SPF booster to prevent and / or correct damage related to UV radiation, in association with at least one chemical and / or mineral sunscreen. [000517] In one embodiment, the plant extract for its therapeutic use according to the invention as an SPF booster to prevent and / or correct damage related to UV radiation, in association with at least one chemical and / or mineral sunscreen as previously defined. [000518] Another object according to the invention relates to a method for the therapeutic treatment of burned skin and / or mucous membranes and / or chapped skin and / or scabies and / or pityriasis alba and / or atopic dermatitis and / or ichthyosis characterized in that it comprises the application to the area to be treated of a plant extract according to the invention. [000519] Another object according to the invention relates to a method for the therapeutic treatment of dry skin and / or mucous membrane conditions which accompany skin conditions and / or pathologies of the mucous membranes such as eczema, and / or for maintaining or improving the hydration status of the skin and / or mucous membranes of skin and / or mucous membranes which are damaged, sensitive, sensitized, altered, intolerant and / or reactive, and / or in the treatment of scaly conditions and / or itching related to dry skin and / or mucous membranes characterized in that it comprises the application to the area to be treated of a plant extract according to the invention. [000520] Another object according to the invention relates to a method for the therapeutic treatment of lice and / or parasites, characterized in that it comprises the application to the area to be treated of a plant extract according to the invention [000521] Another object according to the invention relates to a therapeutic treatment method for damage related to UV radiation characterized in that it comprises the application to the area to be treated of a plant extract according to the invention. [000522] The present invention also relates to a process for obtaining a plant extract according to the invention, is characterized in that it comprises the following steps: a) a precipitate obtained from a shea butter fractionation process is available, ai) a saponification step is carried out on said precipitate in a concentrated sodium hydroxide and / or potassium hydroxide solution, a?) a dilution is carried out with an alcohol, as) the soapy phase is removed to obtain a light phase by decantation, a4) the light phase is washed with a water / alcohol mixture, b) the light phase obtained in step a is treated with an acid, c) the acid-treated light phase obtained in step b is washed with a water / alcohol mixture, d) the washed light phase obtained in step c is dried. [000523] In one embodiment, the plant extract is obtained from Vitellaria paradoxa. [000524] In one embodiment, the vegetable extract is derived from shea butter (INCI Code: BUTYROSPERMUM PARKII BUTTER). [000525] In one embodiment, shea butter is fractionated and after removal of the liquid phase comprising shea olein and stearin, a precipitate is obtained. [000526] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that the raw material is the precipitate from a fractionation process of shea butter. [000527] In one embodiment, the precipitate from a shea butter fractionation process is obtained by fractionating raw, semi-refined and / or refined shea butter. [000528] In one embodiment, the fractionation of shea butter is carried out by treatment with acetone, at the reflux temperature of acetone and then cooled to room temperature to eliminate the stearin and olein fractions and obtain the precipitate from the shea butter fractionation process. [000529] In one embodiment, the acetone treatment is carried out at least twice to significantly increase the concentration of the precipitate in nonpolar unsaponifiable fraction and lower that in triterpenic alcohols [000530] Said precipitate from the shea butter fractionation process is then subjected to a filtration and drying step to obtain the dry precipitate. [000531] In one embodiment, the fractionation of shea butter is characterized in that the acetone treatment step is carried out for less than two hours. [000532] In one embodiment, the fractionation of shea butter is characterized in that the acetone treatment step is carried out for less than one hour. [000533] In one embodiment, the fractionation of shea butter is characterized in that the acetone treatment step is carried out for approximately thirty minutes. [000534] In one embodiment, the fractionation of shea butter is characterized in that the acetone treatment step is carried out with a Shea Butter / Acetone ratio in Kg / L of less than 0.2, preferably less than 0.15. [000535] In one embodiment, the precipitate from the shea butter fractionation process is obtained with a production yield of at least 1% by weight of dry precipitate relative to the dry weight of shea butter from which the fractionation process is implemented. [000536] In one embodiment, the yield of precipitate production from the shea butter fractionation process is at least 3% by weight of dry precipitate relative to the dry weight of shea butter from which the process is implemented. [000537] In one embodiment, the drying step to obtain the precipitate from a dry shea butter fractionation process is carried out under vacuum. [000538] In one embodiment, the precipitate from the shea butter fractionation process is enriched in unsaponifiable matter and depleted in triterpenic alcohols. [000539] In one embodiment, the precipitate from the shea butter fractionation process has an unsaponifiable content greater than 50% and a triterpenic alcohol content less than 5%. [000540] In one embodiment, the saponification step is carried out after melting the precipitate from the shea butter fractionation process. [000541] In one embodiment, an antioxidant incorporation step is carried out before the drying step. [000542] The advantage of using a precipitate from the fractionation process of significantly softened shea butter is to allow for the maintenance of a moderate viscosity and to be able to vigorously agitate the reaction medium. [000543] In one embodiment, the sodium hydroxide or potassium hydroxide solution used in step ai)) is concentrated at 5% (w / w) by dry weight of sodium hydroxide or potassium hydroxide relative to the total weight of the sodium hydroxide or potassium hydroxide solution. [000544] In one embodiment, the sodium hydroxide or potassium hydroxide solution used in step ai)) is concentrated at 10% (w / v) by dry weight of sodium hydroxide or potassium hydroxide relative to the total weight of the sodium hydroxide or potassium hydroxide solution. [000545] In one embodiment, the saponification step a1) is carried out in the presence of ethanol. [000546] The absence of a solvent treatment step using a linear, branched, and / or cyclic alkane, and / or aromatic compound, has the advantage of ensuring the naturalness of the resulting product, allows for processing under non-ATEX conditions, and increases the yield of unsaponifiable matter. [000547] The absence of alcohol as a solvent in the saponification step ai) allows for processing at higher temperatures, thus improving the effectiveness of vigorous agitation because the viscosity remains moderate, whereas it would tend to increase as triglycerides are transformed into soaps at low temperatures. [000548] In the presence of ethanol, the yield of the unsaponifiable fraction according to the invention is significantly altered, as the alcohol carries away a substantial portion of the unsaponifiable fraction according to the invention during the water washing.The absence of ethanol therefore also makes it possible to increase the yield in terms of unsaponifiable content. [000549] In one embodiment, step ai) further includes heating to a temperature greater than or equal to 60°C under stirring until complete melting of the plant extract available in step a). [000550] In one embodiment, step ai) further includes heating to a temperature greater than or equal to 60°C under stirring until complete melting of the plant extract available in step a). [000551] In one embodiment, step ai) further comprises heating to a temperature greater than or equal to 60°C with stirring until complete melting of the precipitate resulting from the fractionation process of shea butter previously dried under vacuum. [000552] In one embodiment, step ai) further includes heating to a temperature greater than or equal to 80°C under stirring until significant softening of the plant extract available in step a) previously dried under vacuum. [000553] In one embodiment, step ai) further includes heating to a temperature greater than or equal to 80°C under stirring until significant softening of the precipitate from the fractionation process of the previously vacuum-dried shea butter. [000554] In one embodiment, step ai), is carried out at a temperature greater than or equal to 100°C. [000555] In one embodiment, step ai) is carried out at a temperature above temperature of approximately 120°C. [000556] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that the dilution in step a?), is carried out by adding a water / ethanol mixture. [000557] In one embodiment, step a?), is carried out at a temperature greater than or equal to 90°C. [000558] In one embodiment, step a?) is carried out at a temperature above temperature of approximately 100°C. [000559] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step a4) is carried out using a water / ethanol mixture. [000560] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature of at least 90°C. [000561] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature of at least 100°C. [000562] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature of at least 120°C. [000563] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature within a range of 90°C to 150°C. [000564] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature within a range of 100°C to 140°C. [000565] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out at a temperature within a range of 110°C to 130°C. [000566] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out for a period of between 10 minutes and 3 hours. [000567] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out for a period of between 30 minutes and 1.5 hours. [000568] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out for approximately 1 hour. [000569] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with at least one Lewis acid and / or one Brønsted acid. [000570] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with at least one Brønsted acid selected from the group comprising: a mineral acid and / or an organic acid. [000571] In one embodiment the mineral acid is chosen from the group comprising: sulfuric acid, hydrochloric acid, phosphoric acid and / or perchloric acid. [000572] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with sulfuric acid. [000573] In one embodiment, the organic acid is chosen from the group comprising the following acids: formic, acetic, lactic, citric, para-toluene sulfonic, methanesulfonic and / or chloroacetic. [000574] In one embodiment, the Lewis acid is chosen from the group comprising the following acids: titanium tetrachloride, tin dichloride, aluminum chloride and / or boron trifluoride. [000575] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with an acid with a molarity in the range of 0.01 M to 3.0 M. [000576] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with an acid with a molarity in the range of 0.05 M to 2.0 M. [000577] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with an acid with a molarity in the range of 0.1 M and 1.0 M. [000578] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step b) of acid treatment is carried out with 0.1 M sulfuric acid. [000579] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that step ai is carried out in a concentrated sodium hydroxide and / or potassium hydroxide solution. [000580] For the purposes of the present invention, "concentrated sodium hydroxide solution" or "concentrated potassium hydroxide solution" means a sodium hydroxide or potassium hydroxide solution concentrated to at least 1% (w / w) by weight of sodium hydroxide or potassium hydroxide relative to the total weight of the sodium hydroxide or potassium hydroxide solution. [000581] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that in step c) the washing of the acid-treated light phase obtained in step b) is carried out with demineralized water and / or with a saline solution and / or with a water / alcohol mixture. [000582] In one embodiment, step c), is carried out at a temperature greater than or equal to 90°C. [000583] In one embodiment, step c) is carried out at a temperature above a temperature of approximately 105°C. [000584] In one embodiment, step c) is repeated at least twice. [000585] In one embodiment, step c) is repeated at least four times. [000586] Repeating the washing steps allows the solution to be neutralized, making it easier to formulate, particularly in cosmetic and / or pharmaceutical compositions. [000587] In one embodiment, the process for obtaining a plant extract according to the invention is characterized in that it further comprises a step (d), after step (c) as previously defined, in which [000588] Step d) of drying can be carried out by all the means classically known to a person skilled in the art. [000589] In one embodiment, step d) is carried out under vacuum. [000590] In one embodiment, step d) is carried out at a temperature above 100°C. [000591] In one embodiment, at least one of the steps ai), as) and / or, c) is carried out hot. [000592] In one embodiment, all steps ai), as) and c) are carried out while hot. [000593] For the purposes of the present invention, a process step carried out "hot" means any step carried out at a temperature above 90°C. [000594] Carrying out the process steps at a high temperature lowers the viscosity of the reaction medium, achieving almost complete saponification of fatty acids and glycerides in a relatively short time compared to a reaction carried out below 90°C. Similarly, a high temperature prevents crystallization of the extract according to the invention, which would result not only in reduced yield but also in clogging of the installation, making it impossible to drain the reactor to recover the extract according to the invention. [000595] In one embodiment, the process further includes a step of grinding the plant extract obtained. [000596] The advantage of a grinding step is to make the extract easier to formulate, particularly in cosmetic and / or pharmaceutical compositions. [000597] In one embodiment, the process further includes a step of hydrogenating the plant extract according to the invention. [000598] In one embodiment of the process according to the invention, the hydrogenation of the plant extract according to the invention is carried out in an organic solvent in the presence of at least one homogeneous or heterogeneous metallic catalyst, comprising at least one hydrogenating metal included in the group of nickel, copper, cobalt, platinum, ruthenium, rhenium and / or palladium. [000599] In one embodiment, the hydrogenation reaction is carried out under a hydrogen pressure greater than 1 bar. [000600] In one embodiment of the process according to the invention, the hydrogenation reaction is at a temperature above 60°C. [000601] In one embodiment, the process further comprises a step of re-solubilization in a solvent of the plant extract according to the invention and cold recrystallization. [000602] In one embodiment, the process further includes a step of bleaching the plant extract according to the invention. [000603] In one embodiment, the decolorization is carried out with hydrogen peroxide. [000604] In one embodiment, the process further comprises a step of treating the plant extract according to the invention with ethanol. [000605] In one embodiment, the process does not include a treatment step with ethanol, nor with a solvent from the family of linear, branched and / or cyclic alkanes, and / or from the family of aromatic compounds. [000606] In one embodiment, the process does not include a treatment step with a solvent from the family of linear, branched and / or cyclic alkanes. [000607] In one embodiment, the process does not include a treatment step with a solvent from the family of aromatic compounds. [000608] Figure 1 is the carbon 13 (13C) NMR spectrum of the extract according to example 1.2 in CDCh. [000609] Figure 2 is a zoom of the carbon 13 (13C) NMR spectrum of the extract according to example 1.2 in CDCI3. [000610] Figure 3 is the quantitative 13C NMR spectrum of the extract according to the invention in CDCI3. [000611] Figure 4 is a zoom of the quantitative 13C NMR spectrum of the extract according to the invention in CDCI3 [000612] The following examples are given to illustrate the invention. Since these examples are presented for illustrative purposes only, the invention cannot in any way be limited to their subject matter. [000613] In the examples, all percentages are given by weight unless otherwise stated, temperature is expressed in degrees Celsius unless otherwise stated, and pressure is atmospheric pressure unless otherwise stated. [000614] Examples [000615] Example 1: Protocols for preparing the plant extract according to the invention. [000616] Example 1.1: Fractionation of shea butter [000617] A quantity of 10 kg of raw (unrefined) shea butter is mixed with 70 liters of acetone in a stirred reactor equipped with a condenser. The mixture is refluxed for 30 minutes until the shea butter is completely dissolved. The mixture is then cooled to 20°C for one hour and subsequently filtered and dewatered under vacuum. After removal of the liquid phase containing shea olein and stearin, a brown to light brown precipitate is recovered with a yield of 6.6%, or 0.66 kg of material. [000618] Precipitate A is redispersed in 4.6 liters of acetone in a stirred reactor equipped with a condenser. The mixture is refluxed for 30 minutes and then cooled to 20°C for one hour. The mixture is then filtered and dewatered under vacuum. Precipitate B, brown to light brown in color, was recovered with a yield of 91.2%, or 0.77 kg of material. The results of the physicochemical analyses of precipitates A and B are presented in Table 1. [000619] Table 1 Composition of shea butter and precipitates A and B [000620] It is noted that the process yields a precipitate rich in unsaponifiable matter but depleted in triterpene alcohols. The second extraction leads to a precipitate enriched in unsaponifiable matter and even further depleted in triterpene alcohols. [000621] Example 1.2: Process for obtaining a vegetable extract of shea butter according to the invention. [000622] The process for obtaining the extract according to the invention comprises the following successive steps: - melting of precipitate B - Removal of residual acetone under vacuum, - breaking the vacuum with an inert gas (preferably nitrogen), - saponification, - addition of alcohol (ethanol preferably), - separation of heavy and light phases - washing of the light phase with a water-alcohol mixture (preferably ethanol), - treatment using an acidic solution, - washing of the light phase with a water-alcohol mixture (preferably ethanol), - addition of an antioxidant (preferably tocopherol), - vacuum drying, - conditioning of the extract according to the invention. [000623] Precipitate B (400 g) from the shea butter fractionation process according to Example 1.1 is heated to 80°C under vigorous stirring (200 rpm) until completely melted. The reactor is then placed under vacuum (50 mbar) for 15 minutes. The vacuum is then broken by introducing a stream of nitrogen. A solution consisting of 36 g of potassium hydroxide (85% potassium hydroxide flakes), 400 g of softened water, and 20 g of ethanol is added under vigorous stirring (200 rpm). The mixture is refluxed to 105°C. (reactor jacket temperature) and maintained under stirring for 18 hours. A water-ethanol mixture (200 g water + 200 g ethanol) is then added to the reaction mixture. The temperature is raised to 105°C under stirring (200 rpm) for one hour. Stirring is then stopped to allow the heavy and light phases to separate. The heavy phase is then withdrawn and the pH is measured. This washing process is repeated until a pH value between 8 and 9 is reached. [000624] An aqueous solution consisting of 20 g of citric acid and 400 g of softened water is added while vigorously stirring (200 rpm). The mixture is refluxed while stirring at a temperature of 105°C for 60 minutes. Stirring is then stopped to allow the heavy and light phases to separate. The heavy phase is then withdrawn and the pH is measured. A water-ethanol mixture (50 g of water + 50 g of ethanol) is then added to the light phase. The temperature is maintained at 105°C while vigorously stirring for one hour. Stirring is then stopped to allow the heavy and light phases to separate. The heavy phase is then withdrawn and the pH is measured. This washing process is repeated until a pH value between 7 and 8 is reached. The temperature is then lowered to 85°C. 0.25g of antioxidant (Bioxan T90 tocopherol mixture supplied by BTSA) is added to the light phase while stirring.The mixture is heated to 85°C under stirring and then dried under vacuum (50 mbar) for 3 hours. The product is then drawn off under vacuum and stored under a nitrogen blanket. An extract according to the invention, in a light beige solid form, is obtained with a yield of 95.3%. Example 1.3: Physicochemical characterization of precipitate B and of the extract according to the invention Table 2: Composition of precipitate B and extract according to the invention Example 1.4: Structural analysis by nuclear magnetic resonance (NMR) of the extract according to the invention [000625] The 1H analysis was performed on a BROKER 400 MHz liquid NMR spectrometer, Avance type, equipped with a 5 mm BBO probe at 295 K. The relaxation time DI was set at 2 s and the number of scans at 128. The sample (8.3 mg) was solubilized in 0.5 mL of CDCI3 99.8% D Eurisotop lot X1432. [000626] The spectra obtained are shown in figures 1 and 2. [000627] The 1H NMR spectrum is characteristic of a polyisoprene structure. Zooming in on the 1H NMR spectrum of the unsaponifiable fraction (Figure 2) allows the proportion of units 1,4, 1,2, and 3,4 to be calculated in the sample. Indeed, peaks 65.2 at 5, 65.0 at 4.8, and 64.8 at 4.6 are attributable to olefinic hydrogens of units 1,4-, 1,2-, and 3,4, respectively. The intensity of these peaks allows the relative proportions of these units in the analyzed sample to be calculated (Table 4). [000628] Table 3: Relative proportions of units 1,4-, 3,4-, and 1,2- in the sample from the 1H NMR spectrum [000629] Quantitative 13C analysis was performed on a BRUKER 400 MHz liquid NMR spectrometer, Avance type, equipped with a 5 mm BBO probe at 295 K. The relaxation time DI was set at 7 s and the number of scans at 2048. The sample (84.1 mg) was solubilized in 0.5 mL of CDCI3 99.8% D Eurisotop lot X1432. [000630] The spectra obtained are shown in figures 3 and 4. [000631] Zooming in on the 13C NMR spectrum of the extract (Figure 4) allows us to calculate the proportion of trans and cis units contained in the sample. Indeed, the peak at 135.1 ppm corresponds to C2-trans, while the peak at 135.4 ppm corresponds to C2-cis. Similarly, the peak at 39.9 ppm corresponds to Cl-trans, while the peak at 32.4 ppm corresponds to Cl-cis, with -CH2-C(CH3)=CH-CH2(Cl) and -CH2-C(CH3)=CH-CH2(C2). [000632] The intensity of the peaks allows the relative proportions of these units to be calculated in the analyzed sample (Table 5). Table 4: Relative proportions of cis-1,4- and trans-1,4 units in the sample from the 13C spectrum [000633] Conclusions: the extract according to the invention consists of 99.5% 1-4 units with 60% trans units and 40% cis units. [000634] In view of the spectroscopic analysis by NMR and the physicochemical characterizations, the following points emerge: the extract according to the invention is made up of more than 95% by weight of polyisoprenes and does not contain triterpenic alcohols characteristic of the unsaponifiable of shea butter (triterpenic alcohols constitute 51% of the unsaponifiable fraction of the butter, see table 1); the extract according to the invention analyzed by size exclusion chromatography (SEC) is made up of 2 families of polyisoprenes (M1 and M2) representing more than 95% by weight as well as 2 other families of constituents corresponding to the residual lipids: glycerides (M3) and fatty acids (M1). It should be noted that residual lipids M3 are present in very small quantities (1% in SEC) and that these correspond almost essentially to free fatty acids as indicated by the almost identical values ​​of the acid and saponification indices.Residual glycerides (mono- and diglycerides) are known for their emulsifying properties. Therefore, it is important to significantly limit the content of these compounds in the final extract, as a higher concentration and / or variability in this concentration can destabilize the emulsions of said extract, particularly in emulsified cosmetic formulations such as lotions and skincare creams. Similarly, a higher concentration of glycerides can induce significant variations in the viscosity of the extract, affecting the sensory properties of cosmetic formulations (spreadability, texture, stickiness, nourishing effect, etc.).); polyisoprenes are divided into 2 families with average molecular mass of around 300 kDa (Ml) and 20 kDa (M2), with a mass ratio M1 / M2 of around 0.5; structural analysis by NMR showed that the extract according to the invention is made up of 99.5% 1-4 units with 60% trans units and 40% cis units. The extract according to the invention has a high viscosity at 100°C, exceeding 200 Pa.s -1 ; The extract according to the invention has a melting point close to 54°C, which allows it to be formulated at a moderate temperature on an industrial scale. .5 Characterization Methods A- Unsaponifiable content [000635] The unsaponifiable content of precipitate B is determined according to the following method: - Accurately weigh approximately 2 g of precipitate B (mO). - Disperse the precipitate in 25 mL of acetone and bring the mixture to reflux at 120°C, with stirring for 15 minutes. - Filter the mixture using a Büchner funnel and resuspend the precipitate in 25 mL of acetone. - Repeat the reflux treatment twice as described previously. - After recovering the precipitate by filtration, then dry them under vacuum (20 mbar) at 40°C for 2 hours. - Weigh the remaining precipitate precisely (ml). The unsaponifiable fraction content of the precipitate is given by the following relationship: % Unsaponifiable fraction = 100 x ml / mO B- Saponification index [000636] - The saponification index of the extract according to the invention is determined according to the following method: - Accurately weigh approximately 2 g of test sample (mass m). - Dissolve the test portion in 20 mL of THF (solution 1). - Separately prepare a 20 ml THF solution for the blank test (solution 2). - Add exactly 25 mL of the 0.5 M KOH solution to solutions 1 and 2. - Bring solutions 1 and 2 to reflux at 105°C under vigorous stirring, for 1 hour at 105°C. - Titrate the excess potassium in both solutions with a 0.5 M hydrochloric acid solution using phenolphthalein as an indicator. [000637] The value of the saponification index expressed in mg KOH / g is given by the following relationship: _ _ m : mass of the test sample (g) Vbianc: equivalent volume of white (mL) Test volume: equivalent volume of the test sample (mL) C - Acid value [000638] - The acid value of precipitate B and of the extract according to the invention is determined according to the following method: - Weigh approximately 7.5 g of test portion (m) to the nearest milligram. - Prepare a test solution in 20 mL of THF (solution 1). - Separately prepare a 20 ml THF solution for the blank test (solution 2). - Add exactly 25 mL of the 0.5 M KOH solution to both solutions. - Bring the 2 solutions to reflux at 105°C under vigorous stirring for 1 hour at 105°C. - Titrate the excess potassium in both solutions with a 0.5 M hydrochloric acid solution using phenolphthalein as an indicator. [000639] The value of the acid number expressed in mg KOH / g is given by the following relationship: _ _ m : mass of the test sample (g) Vbianc: equivalent volume of white (mL) Test volume: equivalent volume of the test sample (mL) D- Iodine index [000640] The iodine value of precipitate B and of the extract according to the invention is determined according to the following method: - Weigh approximately 0.1 g of the product to be measured to the nearest milligram (test sample). - Prepare 2 solutions by dissolving the test portion in 20 mL of chloroform (solution 1 and 2). - Prepare a 20 mL chloroform solution (solution 3, white) - Add exactly 25 mL of Wijs reagent to the 3 solutions. - The measurement of the iodine index according to the back titration method will therefore be subject to 2 test samples and 1 blank. - Place the 3 solutions in the dark for one hour. - Add to the 3 solutions 20 mL of potassium iodide solution at 100 g / L and 50 mL of demineralized water. - Titrate the 3 solutions with 0.1 M sodium thiosulfate. [000641] The iodine value expressed in grams of iodine per 100g is determined by the following formula: I _ _ m: mass of the test sample (g) Vbianc: equivalent volume of white (mL) Test volume: equivalent volume of the test sample (mL) [000642] The value of the iodine index corresponds to the average of the 2 trials. E- Unsaponifiable content - The unsaponifiable content of the extract according to the invention is determined according to the following method: - Accurately weigh approximately 2 g of extract according to the invention (mO). - Disperse the extract according to the invention in 25 mL of acetone and bring the mixture to reflux at 120°C, with stirring for 15 minutes. - Filter the mixture using a Büchner funnel and collect the precipitated extract in 25 mL of acetone. - Repeat the reflux treatment twice as described previously. - After recovering the precipitated extract, dry it under vacuum (20 mbar) at 40°C for 2 hours. - Weigh the recovered extract precisely (ml). [000643] The unsaponifiable fraction content is given by the following relationship: % Unsaponifiable fraction = 100 x ml / mO F- Fusion Profile [000644] - The determination of the melting profile of precipitate B and of the extract according to the invention is determined according to the following method: [000645] A 5 mg sample of the product to be tested is placed in a platinum crucible. A METTLER TOLEDO DSC 3+ Star System calorimeter is used for thermal analysis. The analysis is performed on a 5 to 6 mg sample in the presence of air at a flow rate of 100 ml / min. The crucible is then gradually heated at a temperature ramp of 2°C / min, with the temperature range for the analysis being between 25 and 150°C. G- Method for determining the content of triterpenoid alcohols [000646] The determination of the relative content of triterpenic alcohols and sterols and / or methyl sterols is carried out by gas chromatography as follows. [000647] A quantity of 2 g of extract to be tested and 25 ml of 0.5N potassium hydroxide alcoholic solution are introduced into a flask. [000648] The mixture is refluxed in the flask equipped with a condenser for one hour. The mixture is cooled and transferred to a separatory funnel. [000649] The flask is washed first with 10 mL of ethyl alcohol, then with 10 mL of demineralized water. [000650] A quantity of 50 ml of water is added to the separatory funnel, then 50 ml of dichloroethane. [000651] The ampoule is closed and shaken vigorously for at least one minute and then allowed to settle until 2 clear phases are formed. [000652] The lower phase containing the soapy solution is transferred to another separatory funnel. The extraction is repeated three times using 50 mL of dichloroethane for each extraction. [000653] All organic phases are collected in a separatory funnel [000654] The organic phase is washed three times with portions of 25 ml of a water-alcohol solution (50 / 50 by volume) by vigorously agitating and removing the hydroalcoholic phase after each wash. [000655] The organic phase is washed successively with portions of 20 ml of water until the wash water no longer turns pink upon the addition of a few drops of phenolphthalein indicator solution. [000656] The organic phase is treated with a rotary evaporator to remove dichloroethane under vacuum until a dry extract is obtained. [000657] In order to eliminate the last traces of dichloroethane, the balloon is placed in a vacuum oven (50 mbar) at 80-90°C for about 1 hour, then cooled and weighed. [000658] The evacuation, cooling and weighing are repeated until a constant weight is obtained. This yields a solid unsaponifiable fraction of the extract. [000659] A silylation step is then carried out on this fraction as follows: - In a vial tube, dissolve 50 mg of said fraction and 10 mg of cholesterol chosen as an internal standard in 2 ml of pyridine. - Add successively 0.5 mL of hexamethyldisilazane and 0.5 mL of trimethylsilyl chloride - Filter the solution through a syringe fitted with a filter (0.2 µm) - 1 pL of the solution is then analyzed by gas chromatography under the conditions described below: [000660] The precise determination of the residual triterpene alcohol content of the extract was carried out by gas chromatography (GC). The instrument used (GC 3800 VARIAN) is equipped with a FID detector. The column used is a BP-5 type, 30 m x 0.26 mm, with a film thickness of 0.25 µm. The column is placed in an oven subjected to an initial temperature of 60°C for 1 minute. The temperature is increased to 180°C (30°C / min) and held for 5 minutes. Finally, the temperature is increased to 285°C (3°C / min) and held for 30 minutes. The carrier gas is hydrogen at a constant pressure of 30 psi (206,843 Pa). The injection sample preparation is carried out at 250°C with a split of 1 to 20. Detection is performed by an FID detector at 290°C. H- Determination of molecular masses and their relative contents Size exclusion chromatography (SEC) method applied to the extract [000661] The determination of molecular masses and their relative contents was carried out by multi-detection size exclusion chromatography (MD-SEC). Molar mass measurements were performed using a Viscotek TDA SEC (Malvern Panalytical), comprising a differential refractive index detector, a viscometer, a light scattering detector, and a UV detector. Stabilized THF was used as the mobile phase at a flow rate of 1 mL / min at 35 °C. All samples were injected at a concentration of approximately 3 mg / mL (THF solvent) after filtration through a 0.45 µm PTFE membrane (injection volume: 100 pL). Separation was performed on three Agilent C mixed columns (SDVB, 5 µm, 300 x 7.5 mm) and one guard column. Mn and D were determined using a conventional calibration curve based on polystyrene standards (PS certified Polymer Standards Service) from 470 to 270,000 g / mol.Omnisec software was used for data acquisition and analysis. I- Method for determining viscosity [000662] The measurement is carried out using a viscometer: TA Instruments model Discovery HR-1 (Hybrid Rheometer) which allows the measurement of viscosities in the molten state, at different temperatures in a range between 25 and 600°C. The test portion is 0.5 ml of molten product. [000663] Example 2: Compositions according to the invention. [000664] Example 2.1: Composition according to the invention in the form of a water / oil emulsion. [000665] A cosmetic composition according to the invention in the form of a water / oil emulsion made up of the following three phases, has a weight composition as indicated below. [000666] In a suitably sized glass beaker, mix the ingredients of phase A and heat this mixture to 85°C using magnetic stirring. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C using magnetic stirring. When both phases A and B have reached a temperature of 85°C, slowly pour phase B into phase A while stirring with a rotor / stator at a speed of 3000 rpm. Maintain Stir for 5 minutes, then cool in a cold water bath, using planetary mixing at a speed of 700 to 1200 rpm, until the temperature of the resulting emulsion reaches 30°C. Finally, add the ingredients of phase C at 30°C, using planetary mixing at a speed of 700 to 1200 rpm, until completely homogenized. [000667] Example 2.2: Composition according to the invention in the form of a shampoo, [000668] A cosmetic composition according to the invention in the form of a shampoo made up of the following two phases, has a weight composition as indicated below. [000669] The preparation process essentially consists of mixing the ingredients of phase A in a suitably sized glass beaker and heating this mixture to 75°C under magnetic stirring. Homogenize. Continue stirring for 5 minutes, then cool using a cold water bath, with planetary mixing at a speed of between 700 and 1200 rpm, until the mixture reaches 30°C. Add the ingredients of phase B at 30°C under planetary mixing at a speed of between 700 and 1200 rpm until completely homogenized. [000670] Example 2.3: Composition according to the invention in the form of a sunscreen. [000671] A cosmetic composition according to the invention in the form of a sunscreen made up of the following three phases, has a weight composition as indicated below. [000672] The preparation process essentially consists of mixing the ingredients of phase A in a suitably sized glass beaker and heating this mixture to 85°C under magnetic stirring. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C under magnetic stirring. When both phases A and B have reached 85°C, slowly pour phase A into phase B while stirring with a rotor / stator at a speed of 3000 rpm. Continue stirring for 5 minutes, then cool using a cold water bath with planetary mixing at a speed of between 700 and 1200 rpm until the temperature of the resulting emulsion reaches 30°C. Next add the ingredients of phase C at 30°C under planetary stirring, at a stirring speed between 700 and 1200 rpm until complete homogenization. [000673] Example 2.4: Composition according to the invention in the form of a moisturizing care cream (oil / water emulsion) [000674] In a suitably sized glass beaker, mix the ingredients of phase A and heat this mixture to 85°C using magnetic stirring. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C using magnetic stirring. When both phases A and B have reached a temperature of 85°C, slowly pour phase A into phase B while stirring with a rotor / stator at a speed of 3000 rpm. Continue stirring for 5 minutes, then cool using a cold water bath with planetary mixing at a speed of between 700 and 1200 rpm until the temperature of the resulting emulsion reaches 30°C. Finally add the ingredients of phase C at 30°C under planetary stirring, at a stirring speed between 700 and 1200 rpm until complete homogenization. [000675] Example 2.5: Composition according to the invention in the form of a repairing body balm [000676] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000677] Example 2.6: Composition according to the invention in the form of a facial sunscreen stick [000678] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000679] Example 2.7: Composition according to the invention in the form of a natural foundation [000680] In a suitably sized glass beaker, mix the ingredients of phase A and heat this mixture to 85°C using magnetic stirring. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C using magnetic stirring. When both phases A and B have reached a temperature of 85°C, slowly pour phase B into phase A, while stirring with a rotor / stator at a speed of 3000 rpm. Continue stirring for 5 minutes, then cool using a cold water bath, with planetary stirring at a speed of between 700 and 1200 rpm, until the temperature of the resulting emulsion reaches 30°C. Finally add the ingredients of phase C at 30°C under planetary stirring, at a stirring speed between 700 and 1200 rpm until complete homogenization. [000681] Example 2.8: composition according to the invention in the form of a hair styling wax [000682] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000683] Example 2.9: composition according to the invention in the form of a moisturizing eye balm [000684] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000685] Example 2.10: composition according to the invention in the form of a lip gloss [000686] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached 85°C, cool it while stirring planetarily. at a stirring speed of between 700 and 1200 rpm, until room temperature. [000687] Example 2.11: composition according to the invention in the form of a mineral sunscreen [000688] In a suitably sized glass beaker, mix the ingredients of phase A and heat this mixture to 85°C using magnetic stirring. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C using magnetic stirring. When both phases A and B have reached a temperature of 85°C, slowly pour phase A into phase B while stirring with a rotor / stator at a speed of 3000 rpm. Continue stirring for 5 minutes, then cool using a cold water bath with planetary mixing at a speed of between 700 and 1200 rpm until the temperature of the resulting emulsion reaches 30°C. Finally add the ingredients of phase C at 30°C under planetary stirring, at a stirring speed between 700 and 1200 rpm until complete homogenization. [000689] Example 2.12: composition according to the invention in the form of a surf wax [000690] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 90°C while stirring magnetically. When the mixture has reached a temperature of 90°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature and then pour into molds of suitable size. [000691] Example 2.13: Composition according to the invention in the form of a leave-in hair cream [000692] In a suitably sized glass beaker, mix the ingredients of phase A and heat this mixture to 85°C while stirring magnetically. Meanwhile, in a suitably sized glass beaker, mix the ingredients of phase B and heat this mixture to 85°C under magnetic stirring. When both phases A and B have reached a temperature of 85°C, slowly pour phase A into phase B, under rotor / stator stirring, at a speed of 3000 rpm. Maintain stirring for 5 minutes, then cool using a cold water bath, under planetary stirring, at a stirring speed between 700 and 1200 rpm, until the temperature of the resulting emulsion reaches 25°C. [000693] Example 2.14: Composition according to the invention in the form of a titanium dioxide pigment paste [000694] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000695] Example 2.15: Composition according to the invention in the form of a titanium dioxide pigment paste [000696] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000697] Example 2.16: Composition according to the invention in the form of a pigment paste of titanium dioxide (nano) [000698] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000699] Example 2.17: Composition according to the invention in the form of a natural makeup pigment paste [000700] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000701] Example 2.18: Composition according to the invention in the form of a makeup pigment paste [000702] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool under planetary stirring, at a stirring speed between 700 and 1200 rpm, until at room temperature. [000703] Example 2.19: Composition according to the invention in the form of a shea olein enriched in unsaponifiables [000704] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000705] Example 2.20: Substitution of beeswax by the extract of the plant extract according to the invention [000706] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 90°C while stirring magnetically. When the mixture has reached 90°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000707] Example 2.21: Substitution of petroleum jelly with the extract of the plant extract according to the invention [000708] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 90°C while stirring magnetically. When the mixture has reached 90°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000709] Example 2.22: Substitution of lanolin by the extract of the plant extract according to the invention [000710] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 90°C using magnetic stirring. When the mixture has reached 90°C, cool it using planetary stirring. at a stirring speed of between 700 and 1200 rpm, until room temperature. [000711] Example 2.23: Substitution of lanolin wax by the extract of the plant extract according to the invention [000712] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 90°C while stirring magnetically. When the mixture has reached 90°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature. [000713] Example 2.24: Substitution of shea butter by the extract of the plant extract according to the invention [000714] Mix all the ingredients of phase A one by one in a suitably sized glass beaker. Heat this mixture to 85°C while stirring magnetically. When the mixture has reached a temperature of 85°C, cool it using planetary mixing at a speed of between 700 and 1200 rpm until it reaches room temperature.

Claims

DEMANDS

1. . Plant extract comprising at least one polyisoprene Ml of mass average molecular weight (Mw) greater than 250 kDa and at least one polyisoprene M2 of mass average molecular weight (Mw) within a range of 10 kDa to 40 kDa and in that its unsaponifiable content is within a range of 85% to 100% (w / w) relative to the total mass of the plant extract.

2. . Plant extract according to claim 1, characterized in that the polyisoprene Ml has a mass average molecular weight (Mw) within a range of 250 kDa to 600 kDa.

3. . Plant extract according to any one of the preceding claims, characterized in that it further comprises at least M3 glycerides of mass average molecular mass (Mw) in the range of 1 kDa to 3 kDa.

4. . Plant extract according to any one of the preceding claims, characterized in that it further comprises at least M4 fatty acids of mass average molecular mass (Mw) in the range of greater than 0.40 KDa to 1 KDa.

5. . Plant extract according to any one of the preceding claims, characterized in that the mass content of polyisoprene M1 and M2 is within a range of 75% to 100% (w / w) relative to the total mass of the plant extract.

6. . Plant extract according to any one of the preceding claims, characterized in that the mass content of polyisoprene Ml is within a range of 15% to 50% (w / w) relative to the total mass of the plant extract.

7. . Plant extract according to any one of the preceding claims, characterized in that the mass content of polyisoprene M2 is within a range of 25% to 80% (w / w) relative to the total mass of the plant extract.

8. . Plant extract according to any one of the preceding claims, characterized in that the mass content of glycerides M3 is within a range of 0% to 25% (w / w) relative to the total mass of the plant extract. [000715] Plant extract according to any one of the preceding claims, characterized in that the mass content of M4 fatty acids is within a range of 0% to 15% (w / w) relative to the total mass of the plant extract.

9. . Plant extract according to any one of the preceding claims, characterized in that the polyisoprenes M1 and M2 are 1,4 polyisoprenes.

10. . Plant extract according to any one of the preceding claims, characterized in that the polyisoprenes M1 and M2 are 1,4 polyisoprenes of cis-1,4 and / or trans 1,4 form.

11. . Plant extract according to any one of the preceding claims, characterized in that it further comprises triterpenic alcohols.

12. . Plant extract according to claim 11, characterized in that the mass content of triterpenic alcohols is within a range of 0.01% to 10% (w / w) relative to the total mass of unsaponifiable matter of the plant extract.

13. . Plant extract according to any one of claims 11 or 12, characterized in that the mass content of triterpenic alcohols is within a range of 0.01% to 1% (w / w) relative to the total mass of the plant extract.

14. . Plant extract according to any one of the preceding claims, characterized in that its acid value is within a range from 0.01 mg KOH / g to 10 mg KOH / g.

15. . Plant extract according to any one of the preceding claims, characterized in that its saponification index is within a range from 1 mg KOH / g to 30 mg KOH / g.

16. . Plant extract according to any one of the preceding claims, characterized in that its iodine value is within a range of 200 gh / 100g to 400 gh / 100g.

17. . Plant extract according to any one of the preceding claims, characterized in that its melting temperature measured by DSC is within a range of 20°C to 100°C.

18. . Plant extract according to any one of the preceding claims, characterized in that it is obtained from a plant naturally comprising at least one polyisoprene.

19. . Plant extract according to any one of the preceding claims, characterized in that it is obtained from one of the plants selected from the group comprising: Vitellaria paradoxa, Palaquium gutta, Hevea, Parthenium argentatum, Kz dandelion, Eucommia ulmoides, Ficus carica, Artocarpus heterophyllus, Argania spinosa and / or Euphorbia macroclada.

20. . Plant extract according to any one of the preceding claims, characterized in that the plant extract is obtained from Vitellaria paradoxa.

21. . Composition comprising a plant extract according to any one of the preceding claims.

22. . Composition according to claim 21, characterized in that the composition is a cosmetic or pharmaceutical, in particular dermatological.

23. . Use of the plant extract according to any one of claims 1 to 20 to modify the rheology of a composition and / or as a gelling agent in a composition and / or as a thickening agent in a composition and / or to maintain and / or increase the stability of an emulsion and / or to maintain and / or increase the hydrophobic character of a composition and / or to maintain and / or increase the water resistance of a composition.

24. . Use of the plant extract according to any one of claims 1 to 20, as substitutes and / or equivalents for fossil-derived paraffins, dimethicones, glyceryl rosinate, lanolin and / or petrolatum, and / or natural waxes, in particular beeswax.

25. . Use of the plant extract according to any one of claims 1 to 20, to disperse solid particles in a composition.

26. . Non-therapeutic cosmetic use of a plant extract according to any one of claims 1 to 20 as a cosmetic active ingredient.

27. . Cosmetic treatment method comprising applying to all or part of healthy skin and / or healthy hair and / or skin appendages, and / or healthy hair, the extract of any one of claims 1 to 20.

28. . Plant extract according to any one of claims 1 to 20 for its therapeutic use.

29. . A process for obtaining a plant extract according to any one of claims 1 to 20, characterized in that it comprises the following steps: a) a precipitate obtained from a shea butter fractionation process is made available, ai) a saponification step is carried out on said precipitate in a concentrated sodium hydroxide and / or potassium hydroxide solution, a?) a dilution is carried out with an alcohol, as) the soapy phase is removed to obtain a light phase by decantation, a4) the light phase is washed with a water / alcohol mixture, b) the light phase obtained in step a is treated with an acid, c) the acid-treated light phase obtained in step b is washed with a water / alcohol mixture, d) the washed light phase obtained in step c is dried.