HAIR REVITALIZING COMPOSITION

Abstract

HAIR CONDITIONING COMPOSITION The present invention relates to a hair conditioning composition comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a) an inner core comprising at least one saturated oil; and b) an outer hydrogel shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium. Figure for abstract: none

Description

Title of the invention: HAIR REVITALIZING COMPOSITION Technical field

[0001] The present invention belongs to the field of cosmetic products. In particular, the present invention relates to a hair revitalizing composition. The present invention also relates to a cosmetic process for revitalizing hair. RELATED ART

[0002] The appearance and / or condition of keratinous fibers are often affected by both extrinsic and intrinsic factors such as aging.

[0003] Keratinous fibers, including hair, are constantly exposed to harsh extrinsic conditions, such as the sun, chemical damage, for example, from detergents, bleaching, straightening, dyeing, and perms, heat, for example, from hair dryers or curlers, and stress or mechanical wear, for example, from brushing and styling activities. In addition, any type of hair may lose in quality and / or quantity over time due to age and / or factors such as natural oiliness, perspiration, skin cells shed from the scalp, pollution, dirt, and extreme humidity conditions.

[0004] The factors described above may cause hair to thin and / or impair the visual appearance and feel of the hair, and lead to reduced volume.

[0005] For example, hair may dry out and lose its shine or color or become frizzy and less manageable in both low and high humidity conditions. In low humidity conditions, hair may dry out, and dry hair tends to be less shiny and more brittle. Conversely, in high humidity conditions, hair tends to absorb water, causing the hair to lose its shape and become unmanageable and unattractive.

[0006] Additionally, hair can lose its desirable attributes due to physical stress on the hair such as brushing and heat application. As such, these factors typically damage the keratin fibers, either by affecting the protective materials on the surface of the hair (the cuticle) or by altering the hair fiber internally (the cortex).

[0007] There is therefore also a need to formulate a cosmetic product to re vitalize hair, which is stable over time while providing good hair smoothing. Summary of the invention

[0008] The present invention aims to provide a cosmetic product for conditioning hair, in which a saturated oil is included to provide better stability and smoothness than the product comprising only an unsaturated oil, and therefore the cosmetic product can avoid unpleasant odor due to degradation.

[0009] Thus, according to a first aspect, the present invention provides a hair conditioning composition comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a. an inner core comprising at least one saturated oil; and b. an outer hydrogel shell comprising water and at least one polysaccharide thickener,

[0010] in which the liquid medium is a hydroalcoholic medium.

[0011] The composition according to the present invention comprises hydrogel capsules comprising an inner core oil phase, an outer shell hydrogel phase, and a liquid medium phase, thus it is a three-phase system, which is stable at room temperature, 4°C, and 45°C for at least 2 months.

[0012] The composition according to the present invention can provide good smoothness of the hair.

[0013] In addition, the compositions according to the present invention can be applied easily and evenly to the hair, and can be rinsed easily.

[0014] According to a second aspect, the present invention relates to a hair revitalization process comprising applying the composition as described above to the hair.

[0015] Other characteristics and advantages of the invention will appear more clearly on reading the description and examples which follow. DETAILED DESCRIPTION OF THE INVENTION

[0016] In this document, unless otherwise indicated, the limits of a range of values ​​are included in this range, in particular in the expressions "between...and..." and "from...to...".

[0017] As used herein, the term "comprising" shall be interpreted to include all specifically mentioned features as well as optional, additional, unspecified features.

[0018] In this document, the use of the term "comprising" also discloses the embodiment in which no features other than the speci specifically mentioned is not present (i.e. “consisting of”).

[0019] Unless otherwise defined, all technical and scientific terms used herein have the meaning commonly understood by those skilled in the art to which the present invention pertains. Where the definition of a term in this specification conflicts with the meaning commonly understood by those skilled in the art to which the present invention pertains, the definition described herein shall apply.

[0020] Unless otherwise specified, all numerical values ​​expressing an amount of ingredients and the like used in the description and claims are to be understood as being modified by the term "about". Accordingly, unless otherwise specified, the numerical values ​​and parameters described herein are approximate values ​​which may be modified depending on the desired performance obtained as required. The term "about" denoting a certain value is intended to denote a range within ± 5% of the value, for example: ± 3%, ± 2%, ± 1% and ± 0.5% of the value.

[0021] The articles "a" and "an", as used herein, mean one or more when applied to any feature in embodiments of the present invention described in the specification and claims. The use of "a" and "an" does not limit the meaning to a single feature, unless such a limitation is specifically stated. In addition, the expression "at least one" as used in this specification is equivalent to the expression "one or more" and may be substituted therefor. Hydrogel capsules

[0022] As used herein, the term hydrogel capsule refers to beads consisting of an inner core and an outer hydrogel shell that covers and protects the inner core.

[0023] Advantageously, the hydrogel capsules have a particle size of 0.3 to 15 mm, preferably 1 to 10 mm, more preferably 2 to 6 mm, and even more preferably 3 to 5 mm.

[0024] In this document, the particle size of the hydrogel capsules refers to the average diameter thereof.

[0025] According to the first aspect, the hydrogel capsules comprise an inner core comprising at least one saturated oil, and an outer hydrogel shell comprising water and at least one polysaccharide thickener.

[0026] In one embodiment, the inner core of the composition further comprises at least one unsaturated oil. Inner core

[0027] According to the first aspect, the hydrogel capsules comprise an inner core comprising at least one saturated oil.

[0028] Herein, the term "oil" means a fatty compound or fatty substance which is in the form of a liquid or paste (not solid) at room temperature (25°C) at atmospheric pressure (760 mmHg).

[0029] As oil(s), those generally used in cosmetics can be used alone or in combination thereof. The oil(s) can be volatile, preferably non-volatile.

[0030] The oil may be a non-polar oil such as hydrocarbons, silicones, or the like; a polar oil such as esters, fatty alcohols, and ethers; or a mixture thereof.

[0031] The oil can be oils of vegetable or animal origin and synthetic oils. Saturated oil

[0032] Herein, the term "saturated oil" refers to an oil of a structure which does not comprise unsaturated carbon-carbon bonds, i.e., carbon-carbon double or triple bonds.

[0033] In a preferred embodiment, the saturated oil is a saturated triglyceride oil.

[0034] Preferably, the saturated triglyceride oil corresponds to the following formula (I):

[0035] CH2(OOCRi)CH(OOCR2)CH2(OOCR3) (I)

[0036] wherein Rh R2 and R3 are independently selected from C6-C30 alkyl.

[0037] Advantageously, in formula (I), Rh R2 and R3 are independently chosen from a C6-C24 alkyl, preferably a C6-C20 alkyl, more preferably a C6-C4 alkyl, more preferably a C6-C12 alkyl, most preferably a C6-C10 alkyl, said alkyl is linear or branched.

[0038] In formula (I), RB R2 and R3 may be different, or two or all of Rb R2 and R3 may be the same.

[0039] Examples of saturated triglyceride oil according to formula (I) are given in the CTFA Cosmetic Ingredient Handbook.

[0040] The preferred saturated triglyceride oils according to formula (I) are obtained from carboxylic acids with a carbon chain length ranging from C6 to C24, preferably from C6 to C20, and more preferably from C6 to C[8, linear or branched, saturated or unsaturated, and glycerol.

[0041] In some embodiments, the saturated triglyceride oils according to formula (I) are synthetic.

[0042] In some embodiments, the triglycerides according to formula (I) are of plant origin. For example, vegetable oils that comprise a triglyceride according to formula (I), or a triglyceride according to formula (I) obtained from the oils Plants can be used.

[0043] Examples of synthetic triglycerides include, for example, capryl / caprylyl triglyceride, glyceryl trimyristate, glyceryl tripalmitate, glyceryl glyceryl trilaurate, glyceryl tricaprate, glyceryl tricaprylate, and glyceryl tri(caprate / caprylate).

[0044] Examples of triglycerides of plant origin include, for example, hydrogenated rapeseed oil, hydrogenated soybean oil, hydrogenated sunflower oil, hydrogenated palm oil, hydrogenated castor oil, hydrogenated safflower oil, and hydrogenated peanut oil.

[0045] It is preferred that the saturated oil comprises a mixture of capric and caprylic triglyceride. In one embodiment, the ratio of capric to caprylic in the saturated triglyceride is in the range of about 60:40 to about 80:20 and is preferably about 70:30.

[0046] Products comprising a mixture of capric and caprylic triglyceride include, but are not limited to, products commercially available under the names Crodamol GTCC, NEOBEE 1053, NEOBEE 895 or NEOBEE® M-5. In addition, products comprising a mixture of capric and caprylic triglyceride may include, but are not limited to, C10-18 triglycerides, glyceryl dibehenate (and) tribehenin (and) glyceryl behenate, caprylic / capric / myristic / stearic triglyceride, capric / caprylic triglyceride and caprylic / capric / succinic triglyceride. A preferred example of the mixture of capric and caprylic triglyceride is capric / caprylic triglyceride under the trademark ESTOL 1527 from CRODA.

[0047] Advantageously, the saturated oil is present in the composition of the present invention in an amount ranging from 3% by weight to 40% by weight, more preferably from 5% by weight to 35% by weight, most preferably from 8% by weight to 25% by weight, relative to the total weight of the composition. Unsaturated oil

[0048] Herein, the term "unsaturated oil" means an oil with a structure which comprises unsaturated carbon-carbon bonds, i.e. carbon-carbon double or triple bonds.

[0049] In a preferred embodiment, the unsaturated oil is chosen from unsaturated oils of plant origin.

[0050] Examples of the unsaturated oil of plant origin include, for example, Limnanthes Alba (meadowfoam) seed oil, Argania spinosa kernel oil, apricot oil, Zea Mays germ oil, Passiflora Incarnata seed oil, Gossypium Herbaceum (cotton) seed oil, and Glycine Soja (soybean) oil. A preferred example of the unsaturated oil of plant origin is seeds of Limnanthes Alba (meadowfoam) under the trademark FANCOR MEADOWFOAM SEED OIL from FANCOR (ELEMENTIS).

[0051] Preferably, if the unsaturated oil is present, its amount is about 5% by weight or less relative to the total weight of the composition.

[0052] Advantageously, the unsaturated oil is present in the composition of the present invention in an amount of about 5% by weight or less, preferably about 2% by weight or less, and more preferably about 0.5% by weight or less, for example ranging from about 0.05% by weight to about 5% by weight, or from about 0.1% by weight to about 5% by weight, preferably from about 0.1% by weight to about 2% by weight, and more preferably from about 0.1% by weight to about 0.5% by weight, relative to the total weight of the composition.

[0053] The core may also include a fragrance.

[0054] The fragrance is not particularly limited.

[0055] One skilled in the art can adjust the amount of perfume by conventional means. Hydrogel outer shell

[0056] According to the first aspect, the hydrogel capsules comprise the outer hydrogel shell comprising water and at least one polysaccharide thickener.

[0057] Advantageously, the outer envelope has a thickness of approximately 0.01-2 μm, preferably approximately 0.01-1.5 μm.

[0058] For the purposes of the present invention, the term "polysaccharides" is intended to mean a polymer consisting of sugar units.

[0059] For the purposes of the present invention, the term "sugar unit" is intended to mean an oxygen-bearing hydrocarbon compound containing several alcohol functions, with or without aldehyde or ketone functions, and which comprises at least 4 carbon atoms.

[0060] The sugar units can optionally be modified by substitution, and / or by oxidation and / or by dehydration.

[0061] The sugar units that may be included in the polysaccharide thickener of the present invention are preferably derived from one or more of the following sugars: glucose, galactose, arabinose, rhamnose, mannose, xylose, fucose, anhydrogalactose, galacturonic acid, glucuronic acid, mannuronic acid, galactose sulfate, anhydrogalactose sulfate and fructose.

[0062] In particular, mention may be made, as polysaccharides, of native gums such as: a. tree or shrub exudates, including: • gum arabic (branched polymer of galactose, arabinose, rhamnose and glucuronic acid); • gum ghatti (polymer derived from arabinose, galactose, mannose, xylose and glucuronic acid); • karaya gum (polymer derived from galacturonic acid, galactose, rhamnose and glucuronic acid); • gum tragacanth (polymer of galacturonic acid, galactose, fucose, xylose and arabinose); a. algae-derived gums, including: • agar-agar (polymer derived from galactose and anhydrogalactose); • alginates (polymers of mannuronic acid and glucuronic acid); • carrageenans and furcellerans (polymers of galactose sulfate and anhydrogalactose sulfate); a. gums derived from seeds or tubers, including: • guar gum (polymer of mannose and galactose); • carob gum (polymer of mannose and galactose); • fenugreek gum (polymer of mannose and galactose); • tamarind gum (polymer of galactose, xylose and glucose); • konjac gum (polymer of glucose and mannose); a. microbial gums, comprising: • xanthan gum (polymer of glucose, mannose acetate, mannose / pyruvic acid and glucuronic acid); • gellan gum (polymer of partially acylated glucose, rhamnose and glucuronic acid); • scleroglucan gum (glucose polymer).

[0063] The polysaccharide(s) of the composition according to the invention may also be chosen from mixtures of the above polysaccharides.

[0064] These polymers can be physically or chemically modified. As a physical treatment, heat treatment can in particular be mentioned.

[0065] Chemical treatments that may be mentioned include esterification, etherification, amidation and oxidation reactions. These treatments make it possible to produce polymers that may in particular be non-ionic, anionic or amphoteric.

[0066] Preferably, these chemical or physical treatments are applied to guar gums and locust bean gums.

[0067] The non-ionic guar gums which can be used according to the invention can be modified by C1-C6 (poly)hydroxyalkyl groups.

[0068] Among the C1-C6 (poly)hydroxyalkyl groups, mention may be made, by way of example, of the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.

[0069] These guar gums are well known in the prior art and can be prepared, for example, by reacting corresponding alkene oxides, e.g., propylene oxides, with guar gum to obtain a guar gum modified with hydroxypropyl groups.

[0070] The degree of hydroxyalkylation preferably varies from 0.4 to 1.2 and corresponds to the number of alkylene oxide molecules consumed by the number of free hydroxyl functions present on the guar gum.

[0071] Such non-ionic guar gums optionally modified with hydroxyalkyl groups are sold, for example, under the trade names Jaguar HP8, Jaguar HP60 and Jaguar HP120 by the company Rhodia Chimie.

[0072] The cationic guar gum is preferably hydroxypropyl guar hydroxypropyltrimonium chloride, typically commercially available under the trade name JAGUAR C 162, from the company Rhodia.

[0073] In a particularly preferred manner, the polysaccharide thickener is chosen from: • agar-agar, • non-ionic guar gums, • cationic hydroxyalkyl guar gums, and • combinations of these compounds,

[0074] these polysaccharide thickeners being optionally modified by a heat treatment, an esterification reaction, an etherification reaction, an amidation reaction or an oxidation reaction,

[0075] Even more preferably, the polysaccharide thickener is chosen from agar-agar, hydroxypropyl guar hydroxypropyltrimonium chloride, and a combination thereof.

[0076] The polysaccharide thickener may be inorganic cellulose esters (cellulose nitrates, sulfates, phosphates, etc.), organic cellulose esters (cellulose monoacetates, triacetates, amidopropionates, acetatebutyrates, acetatepropionates and acetatetrimellitates, etc.), and mixed organic / inorganic cellulose esters, such as cellulose acetatebutyrate sulfates and cellulose acetatepropionate sulfates. Examples of cellulose ester ethers include hydroxypropylmethylcellulose phthalates and ethylcellulose sulfates.

[0077] The polysaccharide thickener may be nonionic cellulose ethers, including (Cl-C4)alkylcelluloses, such as methylcelluloses and ethylcelluloses (e.g., Ethocel Standard 100 Premium from Dow Chemical); (poly)hydroxy(Cl-C4)alkylcelluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses (e.g., Natrosol 250 HHR supplied by Ashland) and hydroxypropylcelluloses (e.g., Klucel EF from Aqualon); (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, such as hydroxypropylmethylcelluloses (e.g., Methocel E4M from Dow Chemical), hydroxyethylmethylcelluloses (e.g., Natrosol 250 HHR supplied by Ashland) and hydroxypropylcelluloses (e.g., Klucel EF from Aqualon); ethylcelluloses, hydroxyethylcelluloses (e.g., Bermocoll E 481 FQ from Akzo Nobel) and hydroxybutylmethylcelluloses.

[0078] The polysaccharide thickener may be anionic cellulose ethers, of which mention may be made of (poly)carboxy(Cl-C4)alkylcelluloses and their salts. By way of example, mention may be made of carboxymethylcelluloses, carboxymethylmethylcelluloses (for example Blanose 7M from the company Aqualon) and carboxymethylhydroxyethylcelluloses, and their sodium salts.

[0079] The polysaccharide thickener may be cationic cellulose ethers, of which mention may be made of cationic cellulose derivatives such as cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer, and described in particular in US patent 4,131,576, such as (poly)hydroxy(Cl-C4)alkyl celluloses, for example hydroxymethyl-, hydroxyethyl- or hydroxypropylcelluloses grafted in particular with a methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salt. The commercial products corresponding to this definition are more particularly the products sold under the names Celquat® L 200 and Celquat® H 100 by the company National Starch.

[0080] Preferably, the polysaccharide thickener is selected from agar, non-ionic guar gums, cationic hydroxyalkyl guar gums, (poly)hydroxy(C 1 -C4)alkylcelluloses, (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, and combinations thereof.

[0081] More preferably, the polysaccharide thickener is chosen from a combination of agar-agar and cationic hydroxyalkyl guar gum such as hydroxypropyl guar hydroxypropyltrimonium chloride.

[0082] In a particularly preferred embodiment of the invention, the external hydrogel shell comprises at least two distinct polysaccharide thickeners such as those mentioned above.

[0083] Particularly in this preferred embodiment, the outer hydrogel shell comprises a combination of agar and cationic hydroxyalkyl guar gum such as hydroxypropyl guar hydroxypropyltrimonium chloride.

[0084] Advantageously, the polysaccharide thickener is present in the composition according to the present invention in an amount ranging from 0.05% by weight to 2% by weight, preferably from 0.1% by weight to 1.5% by weight, more preferably from 0.2% by weight to 1.0% by weight, relative to the total weight of the composition.

[0085] Advantageously, the external hydrogel shell of the capsule comprises from 0.1% by weight to 2% by weight of agar-agar and from 0.05% by weight to 2% by weight of cationic hydroxyalkylguar, relative to the total weight of the composition according to the present invention.

[0086] More advantageously, the outer hydrogel shell of the capsules comprises from 0.1% by weight to 1% by weight of agar-agar and from 0.05% by weight to 1% by weight of hydroxypropyl guar hydroxypropyltrimonium chloride, relative to the total weight of the composition according to the present invention.

[0087] The envelope may also comprise a pigment.

[0088] The pigment is not particularly limited.

[0089] For example, the pigment may be selected from titanium dioxide, zirconium oxide, cerium oxide, zinc oxide, iron oxide, alumina, aluminum hydroxide, chromium oxide, manganese violet, ultramarine blue, chromium hydrate, ferric blue, aluminum powder, copper powder, silver powder, gold powder, barium sulfate, carbon black, mica, and a mixture thereof.

[0090] In some embodiments, the outer hydrogel shell in the composition of the present invention comprises mica as a pigment.

[0091] Advantageously, the pigment is present in the composition of the present invention in an amount ranging from about 0.01% by weight to about 5% by weight, preferably from about 0.1% by weight to about 2% by weight, relative to the total weight of the composition. Liquid medium

[0092] The liquid medium in the composition according to the invention is a hydroalcoholic medium.

[0093] Preferably, the liquid medium is a hydroalcoholic medium comprising water and monoalcohols and / or polyols, preferably polyols.

[0094] The term "polyol" should be understood as meaning, within the meaning of the present disclosure, an organic molecule comprising at least two free hydroxyl groups. The polyols of the cosmetic composition may be glycols or compounds comprising numerous hydroxyl groups. In certain cases, the one or more polyols is / are chosen from the group consisting of C2-C32 polyols. The one or more polyols are liquid at room temperature (25°C). The one or more polyols may comprise from 2 to 10 carbon atoms, preferably from 3 to 10 carbon atoms, more preferably from 3 to 8 carbon atoms.

[0095] The monoalcohols can be ethanol, propanol, butanol, etc.

[0096] The polyols that may be included in the compositions of the present disclosure, in some cases, are selected from ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, diethylene glycol, dipropylene glycol, 1,3-propanediol, polyethylene glycols, caprylyl alcohol, di-glycerin, glycerin, or mixtures thereof. In some cases, the polyol is butylene glycol. In certain other cases, the at least one polyol comprises butylene glycol. Additionally, in some cases, the compositions comprise at least butylene glycol, and one or more polyols other than butylene glycol such as propylene glycol, dipropylene glycol and / or glycerin.

[0097] Non-limiting examples of polyols that may optionally be included in the compositions according to the present disclosure include and / or may be selected from alkanediols such as glycerin, 1,2,6-hexanetriol, trimethylolpropane, ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, dipropylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol, 2-methyl-2,4-pentanediol, caprylyl glycol, 1,2-hexanediol, 1,2-pentanediol and 4-methyl-1,2-pentanediol; glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono-n-propyl ether,ethylene glycol monoisopropyl ether, diethylene glycol monoisopropyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol mono-t-butyl ether, diethylene glycol mono-t-butyl ether, 1-methyl-l-methoxybutanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-t-butyl ether, propylene glycol mono-n-propyl ether, propylene glycol monoisopropyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol monoisopropyl ether, sorbitol, sorbitan, triacetin, and a mixture of these. ,

[0098] The one or more polyols may optionally be glycols or glycol ethers such as, for example, ethylene glycol monomethyl, monoethyl, and monobutyl ethers, propylene glycol or ethers thereof such as, for example, propylene glycol monomethyl ether, butylene glycol, hexylene glycol, dipropylene glycol, as well as diethylene glycol alkyl ethers, for example, diethylene glycol monoethyl ether or monobutyl ether. In some cases, the one or more polyols may include or are selected from ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, 1,3-propanediol, diethylene glycol, dipropylene glycol, caprylyl glycol, glycerin, and a mixture thereof.

[0099] Preferably, the polyols are selected from the group consisting of hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, and combinations thereof.

[0100] Even more preferably, the polyol comprises butylene glycol, in particular, 1,3-butylene glycol. Most preferably, butylene glycol is produced by biotechnology.

[0101] Advantageously, the polyol(s) is (are) present in the composition of the present invention in an amount ranging from 2% by weight to 50% by weight, more preferably from 4% by weight to 40% by weight, most preferably from 4% by weight to 20% by weight, relative to the total weight of the composition.

[0102] Advantageously, water is present in the composition of the present invention in an amount ranging from about 40% by weight to about 80% by weight, preferably from about 50% by weight to about 75% by weight, relative to the total weight of the composition.

[0103] In some embodiments, the liquid medium comprises 50 to 85% by weight of water in the medium, based on the total weight of the composition. Adjuvants or additives

[0104] The liquid medium or outer hydrogel shell of the present invention may comprise conventional cosmetic adjuvants or additives, for example, preservatives and bactericides, hair conditioners based on hydrophilic thickeners.

[0105] Preferably, the liquid medium comprises a hydrophilic thickener, which is preferably selected from C1-C4 alkylcelluloses; (poly)hydroxy(C1-C4)alkylcelluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses and hydroxypropylcelluloses; (poly)hydroxy(C1-C4)alkyl(C1-C4)alkylcelluloses, such as hydroxypropylmethylcelluloses, hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses and hydroxybutylmethylcelluloses, and a combination thereof.

[0106] The hydrophilic thickener is different from the polysaccharide thickener mentioned above.

[0107] As a hair conditioner, mention may be made of cationic polymers, a fatty alcohol, a fatty ester, silicones, aminosilicones.

[0108] If present, the hydrophilic thickener in the liquid medium is present in an amount ranging from 0.05% by weight to 5% by weight, preferably from 0.1% by weight to 3% by weight, more preferably from 0.1% by weight to 2% by weight, relative to the total weight of the composition.

[0109] Preferably, the liquid medium comprises 0.05% by weight to 1% by weight of hydroxypropyl methyl cellulose, relative to the total weight of the composition. Composition

[0110] According to the first aspect of the present invention, the present invention provides a hair conditioning composition, comprising hydrogel capsules in suspension in a liquid medium, wherein the capsules comprise: a. an inner core comprising at least one saturated oil and optionally at least one unsaturated oil; and a. an outer hydrogel shell comprising water and at least one polysaccharide thickener,

[0111] in which the liquid medium is a hydroalcoholic medium.

[0112] Preferably, the weight ratio of the capsules to the liquid medium is from 97:3 to 80:20, preferably from 95:5 to 90:10.

[0113] According to a preferred embodiment, the present invention provides a hair conditioning composition comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise, relative to the total weight of the composition: a. an inner core comprising from 8% by weight to 25% by weight of caprylyl / capryl triglyceride and optionally from 0.1% by weight to 0.5% by weight of Limnanthes Alba (meadowfoam) seed oil; and a. an outer hydrogel shell comprising from 0.1 wt% to 1 wt% agar and from 0.05 wt% to 1 wt% hydroxypropyl guar hydroxypropyltrimonium chloride, and water;

[0114] in which the liquid medium comprises from 2% by weight to 40% by weight of polyol, in particular butylene glycol, and from 0.1% by weight to 2% by weight of (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, in particular hydroxypropyl methylcellulose, and water. Preparation and use

[0115] The composition according to the present invention can be prepared firstly by preparing capsules and then suspending the hydrogel capsules in the liquid medium.

[0116] The capsules may be prepared by a known method. For example, the composition according to the present invention may be prepared as follows: 1. a phase (A) for the hydrogel outer shell is prepared separately to include all the ingredients in the hydrogel outer shell; 2. a phase (B) for the inner core is prepared separately to include all the ingredients in the inner core; 3. a liquid medium is prepared separately to include all the ingredients in the medium; 4. hydrogel capsules are formed in a cooling base by a dripping process with both phases (A) and (B); 5. The formed hydrogel capsules are cleaned and mixed with the liquid medium so that the capsules are suspended in the medium.

[0117] Methods for producing hydrogel capsules are well known in the art. In particular, hydrogel capsules can be prepared by phase separation with different surface tensions.

[0118] For example, a triple-flow concentric dripper can be used to prepare hydrogel capsules, the center is for the central phase, the middle layer is for the outer hydrogel shell wrapped concentrically around the central phase, the outer layer is for a gas flow or a cooling fluid.

[0119] The composition according to the present invention can be used individually or mixed with a cationic hair treatment system to enhance the conditioning benefits for the hair.

[0120] The composition can be used on wet or dry hair.

[0121] According to the second aspect of the present invention, a hair revitalization process comprising applying the composition as described above to the hair.

[0122] In some embodiments, the process comprises the step of mixing the composition according to the present invention with a hair composition comprising a cationic conditioner and then applying the resulting mixture to the hair.

[0123] The conditioning composition comprising a cationic conditioner is not particularly limited. For example, it may be any composition commonly used in the art, such as distearyldimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, behentrimonium chloride, cetrimonium chloride, oleocetyldimethylhydroxyethylammonium chloride, stearamidopropyldimethyl(myristyl acetate)ammonium chloride, a di(Cl-C2 alkyl)(C12-C22 alkyl)hydroxy(Cl-C2 alkyl)ammonium salt, such as a dialkyldimethylammonium or alkyltrimethylammonium salt in which the alkyl radical preferably comprises 12 to 24 carbon atoms, propanetallowdiammonium dichloride, behentrimonium methosulfate, and mixtures thereof.

[0124] Furthermore, the composition according to the present invention can be combined with a mask preferably containing one or more cationic conditioners and then applied to the hair.

[0125] The following examples are given for the purpose of illustration of the present invention and should not be construed as limiting the scope. EXAMPLES

[0126] The main raw materials used, the trade names and the suppliers of these materials are listed in Table 1.

[0127] [Tableauxl] INCI name Trade name Supplier LIMNANTHES ALBA (MEADOWFOAM) SEED OIL FANCOR MEADOWFOAM SEED OIL FANCOR (ELEMENTIS) AGAR AGAR A MORISHITA JINTAN HYDROXYPROPYL GUAR HYDROXYPROPYLTRIMON IUM CHLORIDE JAGUAR C 162 SGI RHODIA (SOLVAY) HYDROXYPROPYL ME- THYLCELLULOSE METHOCEL K 15 M PREMIUM DOW CAPRYLIC / CAPRIC TRIGLYCERIDE ESTOL 1527 CRODA GLYCINE SOJA (SOYBEAN) OIL REFINED CT SOYBEAN OIL ZOR GOSSYPIUM HERBACEUM (COTTON) SEED OIL LIPEX 109 S AARHUSKARLSHA MN BUTYLENE GLYCOL BUTYLENE GLYCOL-1.3 KH NEOCHEM PIGMENTS COLORONA BLACKSTAR GREEN MERCK Inventive Examples 1-2

[0128] The compositions according to inventive examples (E1.) 1-2 and comparative examples (CE) 1-4 were prepared with the ingredients listed in Table 2 (the contents are expressed in grams):

[0129] [Tables2] Phase Components Ex.l Ex.2 EC.l EC.2 EC.3 EC.4 Internal core CAPRYLIC / CAPRIC TRIGLYCERIDE 19 19 - - - - LIMNANTHES ALBA (MEADOWFOAM) SEED OIL 0.11 - 0.11 - - - GLYCINE SOJA (SOYBEAN) OIL - - - - 19.11 - GOSSYPIUM HERBACEUM (COTTON) SEED OIL - - - - - 19.11 External envelope AGAR 0.23 0.23 0.23 0.23 0.23 0.23 HYDROXYPROPYL GUAR HYDROXYPRO- PYLTRIMONIUM CHLORIDE 0.09 0.09 0.09 0.09 0.09 0.09 PIGMENTS 0.49 0.49 0.49 0.49 0.49 0.49 WATER 72 72 72 72 72 72 Liquid medium HYDROXYPROPYL METHYLCELLULOSE 0.50 0.50 0.50 0.50 0.50 0.50 BUTYLENE GLYCOL 5.47 5.47 5.47 5.47 5.47 5.47 WATER up to 100 up to 100 up to 100 up to 100 up to 100 Average capsule diameter size* 3 to 5 mm 3 to 5 mm 3 to 5 mm 3 to 5 mm 3 to 5 mm 3 to 5 mm

[0130] *The average diameter can be measured with a Brookhaven particle sizer type BI90PLUS® based on quasi-elastic light scattering (QELS).

[0131] *The pigments in Table 2 include 0.4596% by weight of IRON OXIDES (and) MICA and 0.0353% by weight of MICA (and) TITANIUM DIOXIDE (and) IRON OXIDES (and) SILICA in Table 1, based on the total weight of the composition.

[0132] Preparation procedure:

[0133] The above compositions were prepared from a process comprising the next steps: 1. a phase (A) for the outer hydrogel shell was prepared separately to include water, agar, hydroxypropyl guar hydroxypropyltrimonium chloride and pigments; 1. a phase (B) for the inner core was prepared separately to include caprylic / capric triglyceride and / or Limnanthes alba (meadowfoam) seed oil and / or glycine soja (soybean) oil and / or gossypium herbaceum (cotton) seed oil; 2. a liquid medium was prepared separately to include butylene glycol, hydroxypropyl methylcellulose, and water; 3. hydrogel capsules were formed in a cooling base by a dripping process with both phases (A) and (B);

[0134] in particular, with syringe pumps, phase (B) was transported to the center of a triple-flow concentric dripper, phase (A) was transported to the middle layer of the concentric dripper, a concentric liquid column was formed by phase (A), and compressed air was expelled from the outermost layer of the concentric dripper to force the liquid column and phase (B) to be blown into small hydrogel capsules and drip into a collection container; 1. The formed hydrogel capsules, which are spherical, were cleaned and mixed with the liquid medium so that the hydrogel capsules were suspended in the medium. Assessment

[0135] Stability evaluation and sensory evaluation were carried out on the compositions prepared above. Stability

[0136] The stability of each composition can be evaluated based on rapid stability tests under extreme conditions, total stability, and stability under stirring as follows.

[0137] Stability tests;

[0138] The following tests were conducted 1. Stability in extreme conditions • The test sample was placed in an oven at 50°C for 2 weeks. • The test sample was placed in the refrigerator at -10°C for 24 hours. 1. Total stability • The test samples were placed in an oven at 45°C, 4°C and room temperature, respectively, for two months.

[0139] After each test, the organoleptic properties Appearance, Color and Odor of the sample were checked.

[0140] The sample is considered stable if there is no separation between the hydrogel capsules and the medium and no change in the organoleptic properties. 1. Shaking stability

[0141] The test sample was loaded into a plastic box, and placed in a shaking plate for a period of 60 minutes.

[0142] After the test was completed, the samples were opened and examined to check for any rupture of the capsules. A white color means rupture of the hydrogel capsules due to emulsification between the oil in the inner core and the liquid medium. The test was repeated 2 times, if the result of both times is good, it will be noted as "stable", otherwise it will be noted as "unstable".

[0143] The results for the stability tests are summarized in Table 3.

[0144] [Tables3] TESTS EX. 1 EX. 2 EC.1 EC. 2 EC. 3 EC.4 Stability under extreme conditions Stable Stable Stable Stable unstable Stable Total stability Stable Stable Stable Stable unstable Stable Stability to shaking Stable Stable Stable Stable Stable In vivo sensory evaluation by experts

[0145] A comparative head test between each composition of Ex. 1-2 and EC. 1-4 in combination with a hair mask (available as Kerastase Chronologiste Mask from L'Oréal) was carried out by inviting 6 models (women aged 30-50 with moderate to severe hair damage) to put the test composition on the hair mask, mix the beads into the mask, then apply the hair mask with the test composition to the head, and ask the hair experts (salon hairdressers) to provide feedback on the usage and cosmetic performance.

[0146] The results of the sensory evaluation show that the compositions of inventive Ex. 1-2 with hair mask provide improved smoothness compared to EC.1, 2, 4 with hair mask, and similar to EC.3.

[0147] Mixing the beads with the mask is easier with the compositions of the invention.

[0148] The resulting inventive compositions after mixing are more uniform without pearl residue, thus facilitating the step of application to the hair. The resulting inventive mixtures are also easier to rinse.

[0149] It can be seen that the compositions according to the present invention are stable and can provide the hair with revitalizing benefits. At the same time, the compositions according to the present invention can be applied easily and evenly to the hair, and can be rinsed easily.

[0150] The results for the smoothness tests are summarized in Table 4.

[0151] [Tables4] Properties Ex. 1 Ex. 2 EC. 1 EC. 2 EC. 3 EC. 4 Smoothness 4.5 4 2 1 4.5 1 Odor 4.5 4.5 4.5 4.5 2 2

[0152] *Score: 0-5, 0- means poor smoothness / odor; 5- means best smoothness / odor, and score 3 or above is acceptable.

[0153] From the data in Tables 3-4, it can be seen that the composition according to the present invention can provide both good stability at different temperatures and good smoothness. In contrast, the comparative compositions exhibit unstable formulation and / or unacceptable smoothness or odor.

Claims

Claims

1. A hair conditioning composition comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a) an inner core comprising at least one saturated oil; and b) an outer hydrogel shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium.

2. A composition according to claim 1, wherein the saturated oil is a triglyceride oil having the following formula (I) CH2(OOCR1)CH(OOCR2)CH2(OOCR3) (I) wherein RB R2 and R3 are independently selected from C6-C3o alkyl, preferably RB R2 and R3 are independently selected from C6-C20 alkyl, more preferably Rh R2 and R3 are independently selected from C6-C12 alkyl, said alkyl is straight or branched, preferably the saturated oil is a mixture of capric and caprylic triglyceride, and more preferably the capric to caprylic ratio in the saturated triglyceride is in the range of 60:40 to 80:

20.

3. The composition of claim 2, wherein the unsaturated oil is selected from the group consisting of Limnanthes Alba (Meadowfoam) seed oil, Argania Spinosa kernel oil, Apricot oil, Zea Mays germ oil, Passiflora Incarnata seed oil, Gossypium Herbaceum (Cotton) seed oil, Glycine Soja (Soybean) oil and a combination thereof, and is preferably Limnanthes Alba (Meadowfoam) seed oil.

4. A composition according to any one of claims 1 to 3, wherein the polysaccharide thickener is selected from agar-agar, non-ionic guar gums, cationic hydroxyalkyl guar gums, (poly)hydroxy(Cl-C4)alkylcelluloses, (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, and combinations thereof.

5. A composition according to claim 4, wherein the polysaccharide thickener is selected from a combination of agar-agar and cationic hydroxyalkyl guar gums such as hydroxypropyl guar hydroxypropyltrimonium chloride.

6. Composition according to any one of claims 1 to 5, in in which the hydroalcoholic medium comprises from 2 to 10 carbon atoms, more preferably from 3 to 8 carbon atoms, even more preferably, the polyol is chosen from hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, glycerin, and combinations thereof.

7. A composition according to any one of claims 1 to 6, wherein the liquid medium comprises a hydrophilic thickener, which is preferably selected from (Cl-C4) alkylcelluloses; (poly)hydroxy(Cl-C4)alkylcelluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses and hydroxypropylcelluloses; mixed (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, such as hydroxypropylmethylcelluloses, hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses and hydroxybutylmethylcelluloses, and a combination thereof.

8. A composition according to claim 1, comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise, based on the total weight of the composition: a) an inner core comprising from 8 wt% to 25 wt% caprylyl / capryl triglyceride and optionally from 0.1 wt% to 0.5 wt% Limnanthes Alba (meadowfoam) seed oil; and b) an outer hydrogel shell comprising from 0.1 wt% to 1 wt% agar and from 0.05 wt% to 1 wt% hydroxypropyl guar hydroxypropyltrimonium chloride, and water; wherein the liquid medium comprises from 2% by weight to 40% by weight of polyol, in particular butylene glycol, and from 0.1% by weight to 2% by weight of (poly)hydroxy(Cl-C4)alkyl(Cl-C4)alkylcelluloses, in particular hydroxypropyl methylcellulose, and water.

9. A process for revitalizing hair comprising applying the composition of any one of claims 1 to 8 to the hair.

10. A process according to claim 9 comprising the step of mixing the composition according to any one of claims 1 to 8 with a hair composition comprising a cationic conditioner and then applying the resulting mixture to the hair.