Composition for conditioning hair

Abstract

The present invention relates to a composition for conditioning the hair comprising a hydrogel capsule suspended in a liquid medium wherein the capsule comprises: a) an inner core comprising at least one oil; and b) a hydrogel shell comprising water and at least one polysaccharide thickener, wherein the liquid medium is a hydroalcoholic medium. The invention also relates to a method for caring for the hair, comprising at least a step of applying the composition to the hair.

Description

Technical Field The present invention belongs to the field of cosmetic products. In particular, the present invention relates to a composition for conditioning hair. The present invention also relates to a cosmetic method for conditioning hair. Background Art The appearance and / or condition of keratin fibers is often affected by extrinsic factors and intrinsic factors (eg aging).

[0003] Keratin fibers, especially hair, are constantly exposed to harsh external conditions, such as sunlight, chemical damage (e.g., from detergents, bleaching, straightening, dyeing, and permanent curling), heat (e.g., from hair dryers or curling irons), and mechanical stress or abrasion (e.g., from brushing or combing activities). In addition, any type of hair can lose quality and / or quantity over time due to age and / or due to factors such as natural oils, sweat, skin cells shed from the scalp, pollution, dirt, and extreme humidity conditions.

[0004] The factors described above can lead to thinning of hair and / or impair the visual look and feel of the hair, and result in flat body and reduced volume.

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

[0006] In addition, hair can lose its desirable properties due to physical stresses on the hair, such as brushing and the application of heat. As such, these factors often cause damage to keratin fibers by affecting the protective material on the surface of the hair (cuticle) or by internally altering the hair fiber (cortex).

[0007] Therefore, having products that provide hair conditioning benefits is highly desirable.

[0008] Additionally, for products used to condition hair, it is also desirable that the product be stable over time.

[0009] Therefore, there remains a need to formulate cosmetic compositions for the care of hair which condition the hair and are stable over time. SUMMARY OF THE INVENTION It is therefore an object of the present invention to develop compositions for conditioning hair which are effective in providing hair conditioning benefits.

[0011] It is therefore a further object of the present invention to develop compositions for conditioning hair which are stable over time and which can be easily used with various types of hair products, such as conditioning products.

[0012] Thus, according to a first aspect, the present invention provides a composition for conditioning hair comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a) a kernel comprising at least one oil; and b) a hydrogel shell comprising water and at least one polysaccharide thickener, The liquid medium comprises a hydroalcoholic medium.

[0013] The composition according to the invention comprises an inner core oil phase, a hydrogel shell phase and a liquid medium phase, and is therefore a three-phase system which is stable at room temperature, 4°C and 45°C for at least 2 months.

[0014] Compositions according to the present invention may provide conditioning benefits to the hair.

[0015] Furthermore, the composition according to the present invention can be applied easily and evenly to the hair and can be easily rinsed off.

[0016] According to a second aspect, the present invention provides a method for conditioning hair comprising applying to the hair a composition as hereinbefore described.

[0017] Other characteristics and advantages of the invention will emerge more clearly on reading the following description and examples. DETAILED DESCRIPTION OF THE INVENTION Unless otherwise indicated, the upper and lower limits of a numerical range as used herein are included in the range, especially in the expressions "between ... and ..." and "... to ...".

[0019] As used herein, the term "comprising" should be interpreted as covering all the specifically mentioned features as well as optional, additional, unspecified features.

[0020] As used herein, use of the term "comprising" also discloses embodiments in which features other than those specifically mentioned are absent (ie, "consisting of.").

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the invention belongs. When the definition of a term in this specification conflicts with the meaning commonly understood by those skilled in the art to which the invention belongs, the definition described in this article shall apply.

[0022] Unless otherwise indicated, all numerical values ​​expressing quantities of ingredients and so forth used in the specification and claims are to be understood as modified by the term “about.” Accordingly, unless indicated to the contrary, the numerical values ​​and parameters described herein are approximations that can vary depending upon the desired properties to be obtained.

[0023] As used herein, the expression "at least one" used in this specification is equivalent to the expression "one or more" and may replace the expression "one or more".

[0024] According to a first aspect of the present invention, a composition for conditioning hair comprises hydrogel capsules suspended in a liquid medium, wherein the capsules comprise: a) a kernel comprising at least one oil; and b) a hydrogel shell comprising water, at least one polysaccharide thickener, The liquid medium is a hydroalcoholic medium.

[0025] Preferably, the weight ratio of capsule to medium is 10:90-40:60, preferably 20:80-40:60.

[0026] Hydrogel capsules As used herein, the term hydrogel capsule refers to a bead composed of an inner core and a hydrogel shell covering and protecting the core, wherein the shell is a hydrogel.

[0027] Advantageously, the hydrogel capsule has a particle size of 0.3-15 mm, preferably 1-10 mm, more preferably 2-6 mm.

[0028] As used herein, the particle size of a hydrogel capsule refers to its average diameter size.

[0029] According to a first aspect, a hydrogel capsule comprises an inner core comprising at least one oil and a hydrogel outer shell comprising at least one polysaccharide thickener.

[0030] A kernel comprising at least one oil According to a first aspect, a hydrogel capsule comprises an inner core comprising at least one oil.

[0031] Here, "oil" means a fatty compound or substance that is in the form of a liquid or paste (not solid) at room temperature (25°C) under atmospheric pressure (760 mmHg).

[0032] As the oil, those commonly used in cosmetics can be used alone or in combination thereof. The oil may be volatile or nonvolatile, preferably nonvolatile.

[0033] The oil may be a non-polar oil such as hydrocarbons, silicones, etc.; a polar oil such as esters, fatty alcohols, and ethers; or a mixture thereof.

[0034] The oils may be of vegetable or animal origin as well as synthetic oils.

[0035] Preferably, the oil is a triglyceride oil.

[0036] Preferably, the triglyceride oil has the following formula (I): CH2(OOCR1)CH(OOCR2)CH2(OOCR3) (I) Wherein R1, R2 and R3 are independently selected from C6-C 30 Alkyl and C6-C 30 Alkenyl.

[0037] Advantageously, in formula (I), R1, R2 and R3 are independently selected from C6-C 24 Alkyl and C6-C 24 Alkenyl, preferably C6-C 20 Alkyl and C6-C 20 Alkenyl, more preferably C6-C 14 Alkyl and C6-C 14 Alkenyl, more preferably C6-C 12 Alkyl and C6-C 12 Alkenyl, most preferably C6-C 10 Alkyl and C6-C 10 The alkyl or alkenyl group is linear or branched.

[0038] In formula (I), R1, R2 and R3 may be different, or two or all of R1, R2 and R3 may be the same.

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

[0040] Preferred triglyceride oils according to formula (I) are obtained from triglycerides having carbon chain lengths ranging from C6 to C 24 , preferably C6 to C 20 and more preferably C6 to C 18 Linear or branched, saturated or unsaturated carboxylic acids and glycerol.

[0041] In some embodiments, the triglyceride oil according to formula (I) is synthetic.

[0042] In some embodiments, the triglyceride according to formula (I) is of plant origin. For example, a vegetable oil comprising a triglyceride according to formula (I), or a triglyceride according to formula (I) obtained from a vegetable oil may be used.

[0043] Plant-derived triglyceride oils according to formula (I) are particularly preferred, and specific examples of preferred materials as sources of triglycerides according to formula (I) include peanut oil, sesame oil, avocado oil, coconut oil, cocoa butter oil, almond oil, safflower oil, corn oil, cottonseed oil, olive oil, jojoba oil, palm oil, soybean oil, wheat germ oil, linseed oil and sunflower seed oil.

[0044] Preferably, the composition according to the present invention comprises a triglyceride oil selected from the group consisting of peanut oil, sesame oil, avocado oil, coconut oil, cocoa butter oil, almond oil, safflower oil, corn oil, cottonseed oil, olive oil, jojoba oil, palm oil, soybean oil, wheat germ oil, linseed oil, sunflower oil, and combinations thereof.

[0045] More preferably, the composition according to the invention comprises soybean oil.

[0046] Advantageously, the oil is present in the composition of the invention in an amount ranging from 3 wt.% to 40 wt.%, more preferably from 5 wt.% to 35 wt.%, most preferably from 8 wt.% to 25 wt.%, relative to the total weight of the composition.

[0047] The core may also contain a fragrance.

[0048] The aromatic agent is not particularly limited.

[0049] Those skilled in the art can adjust the amount of fragrance by conventional means.

[0050] A hydrogel shell comprising water and at least one polysaccharide thickener According to a first aspect, the composition according to the invention comprises water and at least one polysaccharide thickener.

[0051] Advantageously, the thickness of the outer shell is 0.1-2 μm, preferably 0.1-1.5 μm.

[0052] For the purposes of the present invention, the term "polysaccharide" is intended to mean a polymer composed of sugar units.

[0053] For the purposes of the present invention, the term "sugar unit" is intended to mean an oxygen-carrying hydrocarbon-based compound containing several alcohol functions, with or without aldehyde or ketone functions, and comprising at least 4 carbon atoms.

[0054] The sugar units may optionally be modified by substitution and / or by oxidation and / or by dehydration.

[0055] The sugar units that can 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.

[0056] As polysaccharides, mention may especially be made of natural gums, such as: a) Exudates from trees or shrubs, 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); - Tragacanth gum (polymer of galacturonic acid, galactose, fucose, xylose and arabinose); b) Glues obtained from algae, including: - agar (polymer derived from galactose and anhydrogalactose); - Alginate (polymer of mannuronic acid and glucuronic acid); - carrageenan and furcellan (polymers of galactose sulfate and anhydrogalactose sulfate); c) Gums obtained from seeds or tubers, including: - guar gum (polymer of mannose and galactose); - Locust bean 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); d) Microbial gums, including: - Xanthan gum (polymer of glucose, mannose acetate, mannose / pyruvic acid and glucuronic acid); - Gellan gum (partially acylated polymer of glucose, rhamnose and glucuronic acid); - Scleroglucan gum (glucose polymer).

[0057] The polysaccharide of the composition according to the invention may also be chosen from mixtures of the above polysaccharides.

[0058] These polymers may be modified physically or chemically. As physical treatment, mention may especially be made of thermal treatments.

[0059] Chemical treatments that may be mentioned include esterifications, etherifications, amidations and oxidations. These treatments make it possible to produce polymers that may in particular be nonionic, anionic or amphoteric.

[0060] Preferably, these chemical or physical treatments are applied to guar gum and locust bean gum.

[0061] The nonionic guar gums which can be used according to the invention can be modified with C1-C6 (poly)hydroxyalkyl groups.

[0062] Among the C1-C6 (poly)hydroxyalkyl radicals, mention may be made, by way of example, of the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl radicals.

[0063] These guar gums are well known in the prior art and can be prepared, for example, by reacting the corresponding alkylene oxides, for example propylene oxide, with guar gum in order to obtain hydroxypropyl-modified guar gums.

[0064] 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.

[0065] Such nonionic guar gums, optionally modified with hydroxyalkyl groups, are sold, for example, by the company Rhodia Chimie under the names Jaguar HP8, Jaguar HP60 and Jaguar HP120.

[0066] The cationic guar gum is preferably hydroxypropyl guar hydroxypropyltrimonium chloride, commonly available under the trade name JAGUARC 162 from Rhodia Corporation.

[0067] Particularly preferably, the polysaccharide thickener is selected from: - agar, - guar gum, and - Combinations of these compounds, these polysaccharide thickeners are optionally modified by heat treatment, esterification, etherification, amidation or oxidation.

[0068] Even more preferably, the polysaccharide thickener is selected from agar, hydroxypropyl guar hydroxypropyltrimonium chloride, and combinations thereof.

[0069] The polysaccharide thickener may be an inorganic ester of cellulose (cellulose nitrate, cellulose sulfate, cellulose phosphate, etc.), an organic cellulose ester (cellulose monoacetate, cellulose triacetate, cellulose amidopropionate, cellulose acetate butyrate, cellulose acetate propionate, and cellulose acetate trimellitate, etc.), and a mixed organic / inorganic ester of cellulose, such as cellulose acetate butyrate sulfate and cellulose acetate propionate sulfate. Among the cellulose ester ethers, hydroxypropyl methylcellulose phthalate and ethyl cellulose sulfate may be mentioned.

[0070] The polysaccharide thickener may be a nonionic cellulose ether, mention being made of (C1-C4)alkylcelluloses such as methylcellulose and ethylcellulose (e.g. Ethocel standard 100 Premium from Dow Chemical); (poly)hydroxy(C1-C4)alkylcelluloses such as hydroxymethylcellulose, hydroxyethylcellulose (e.g. Natrosol 250HHR supplied by Ashland) and hydroxypropylcellulose (e.g. Klucel EF from Aqualon); mixed (poly)hydroxy(C1-C4)alkyl(C1-C4)alkylcelluloses such as hydroxypropylmethylcellulose (e.g. Methocel E4M from Dow Chemical), hydroxyethylmethylcellulose, hydroxyethylethylcellulose (e.g. Bermocoll E 481 FQ from Akzo Nobel) and hydroxybutylmethylcellulose.

[0071] The polysaccharide thickener may be an anionic cellulose ether, mention being made of (poly)carboxy (C1-C4) alkyl cellulose and its salts. By way of example, mention may be made of carboxymethyl cellulose, carboxymethyl methyl cellulose (e.g. Blanose 7M from the company Aqualon) and carboxymethyl hydroxyethyl cellulose, and its sodium salt.

[0072] The polysaccharide thickener may be a cationic cellulose ether, mention being made of cationic cellulose derivatives, for example cellulose copolymers or cellulose derivatives grafted with water-soluble quaternary ammonium monomers and described in particular in patent US 4 131 576, for example (poly)hydroxy(C1-C4)alkylcelluloses such as hydroxymethylcellulose, hydroxyethylcellulose or hydroxypropylcellulose grafted in particular with methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salts. Commercial products corresponding to this definition are more particularly available from the company National Starch under the name L 200 and Products sold by H 100.

[0073] In a most especially preferred embodiment of the present invention, the composition comprises at least two different polysaccharides, such as those mentioned above.

[0074] Especially in this preferred embodiment, the composition according to the invention comprises a combination of agar, cellulose and guar gum (such as those mentioned above), especially a combination of agar and cationic hydroxyalkyl guar gum (such as hydroxypropyl guar hydroxypropyltrimonium chloride) and hydroxyalkyl cellulose (such as hydroxypropyl methylcellulose).

[0075] Advantageously, the polysaccharide thickener is present in the composition according to the invention in an amount ranging from 0.05 wt.% to 2 wt.%, preferably from 0.1 wt.% to 1.5 wt.%, more preferably from 0.2 wt.% to 1.0 wt.%, relative to the total weight of the composition.

[0076] Advantageously, the shell of the capsule comprises from 0.1 wt.% to 2 wt.% of agar and from 0.05 wt.% to 2 wt.% of cationic hydroxyalkyl guar gum relative to the total weight of the composition according to the invention.

[0077] More advantageously, the shell of the capsule comprises 0.1 wt.% to 1 wt.% of agar and 0.05 wt.% to 1 wt.% of hydroxypropylguar hydroxypropyltrimonium chloride relative to the total weight of the composition according to the invention.

[0078] The shell may also contain pigments.

[0079] The pigment is not particularly limited.

[0080] For example, the pigment can be selected from titanium dioxide, zirconium oxide, cerium oxide, zinc oxide, iron oxide, aluminum oxide, aluminum hydroxide, chromium oxide, manganese violet, ultramarine blue, hydrated chromium, iron blue, aluminum powder, copper powder, silver powder, gold powder, barium sulfate, carbon black, mica, and mixtures thereof.

[0081] In some embodiments, the shell in the composition according to the invention comprises mica as a pigment.

[0082] Liquid medium According to a first aspect, the liquid medium in the composition according to the invention is a hydroalcoholic medium.

[0083] In particular, the liquid medium is a hydroalcoholic medium comprising water and a monohydric alcohol and / or a polyhydric alcohol, preferably a polyhydric alcohol.

[0084] Within the meaning of the present disclosure, the term "polyol" is understood to mean an organic molecule comprising at least two free hydroxyl groups. The polyol of the cosmetic composition may be a diol or a compound containing a plurality of hydroxyl groups. In some cases, one or more polyols are / are selected from C2-C32 polyols. One or more polyols are liquid at ambient temperature (25°C). One or more polyols may have 2-10 carbon atoms, preferably 3-10 carbon atoms, more preferably 3-8 carbon atoms.

[0085] The monohydric alcohol may be ethanol, propanol, butanol, etc.

[0086] In some cases, the polyol that may be included in the composition of the present disclosure includes ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, diethylene glycol, dipropylene glycol, 1,3-propanediol, polyethylene glycol, caprylyl glycol, diglycerol, glycerine, or a mixture thereof. In some cases, the polyol is butylene glycol. In some other cases, at least one polyol includes butylene glycol. In addition, in some cases, the composition at least includes butylene glycol and one or more polyols except butylene glycol, such as propylene glycol, dipropylene glycol and / or glycerine.

[0087] Non-limiting examples of polyols that may be optionally included in the cosmetic include and / or may be selected from alkanediols such as glycerol, 1,2,6-hexanetriol, trimethylolpropane, ethylene glycol, propylene 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 monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ... 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-tert-butyl ether, diethylene glycol mono-tert-butyl ether, 1-methyl-1-methoxybutanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-tert-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 mixtures thereof.

[0088] Optionally, one or more polyols can be diols or glycol ethers, such as, for example, monomethyl ether, monoethyl ether and monobutyl ether of ethylene glycol, propylene glycol or their ethers, such as, for example, monomethyl ether of propylene glycol, butylene glycol, hexylene glycol, dipropylene glycol; and alkyl ethers of diethylene glycol, such as monoethyl ether or monobutyl ether of diethylene glycol. In some cases, one or more polyols can include or be selected from ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, 1,3-propanediol, diethylene glycol, dipropylene glycol, caprylyl glycol, glycerol, and mixtures thereof.

[0089] In one or more embodiments, the at least one polyol includes one or more diols.

[0090] Preferably, the diol is selected from hexylene glycol, butanediol, propylene glycol, dipropylene glycol, and combinations thereof.

[0091] Even more preferably, the at least one polyol comprises butanediol, especially 1,3-butanediol.Most preferably, the butanediol is produced biotechnologically.

[0092] Advantageously, the alcohol, in particular the polyol, is present in the composition in an amount ranging from 2 wt.% to 50 wt.%, more preferably from 4 wt.% to 40 wt.%, most preferably from 4 wt.% to 20 wt.%, relative to the total weight of the composition.

[0093] In some embodiments, the medium comprises 50-80 wt. % water in the medium, relative to the total weight of the composition.

[0094] Auxiliary agents or additives The liquid medium or hydrogel shell of the present invention may contain conventional cosmetic adjuvants or additives, such as preservatives and bactericides, hydrophilic thickeners, hair conditioning agents.

[0095] As examples of hydrophilic thickeners, mention may be made of cellulose as described above.

[0096] As hair conditioning agents there may be mentioned cationic polymers, fatty alcohols, fatty esters, silicones, aminosilicones.

[0097] If present, the hydrophilic thickener is present in the liquid medium in an amount ranging from 0.05 wt.% to 5 wt.%, preferably from 0.1 wt.% to 3 wt.%, more preferably from 0.1 wt.% to 2 wt.%, relative to the total weight of the composition.

[0098] Preferably, the liquid medium comprises 0.05 wt% to 1 wt% of hydroxypropyl methylcellulose relative to the total weight of the composition.

[0099] According to a preferred embodiment, the present invention provides a composition for conditioning hair, comprising hydrogel capsules suspended in a liquid medium, wherein the capsules comprise, relative to the total weight of the composition: a) a kernel comprising 8 wt.% to 25 wt.% soybean oil; and b) a hydrogel shell comprising 0.1 wt.% to 1 wt.% agar and 0.05 wt.% to 1 wt.% hydroxypropyl guar hydroxypropyltrimonium chloride, and water; The liquid medium comprises 2wt.%-40wt.% of a polyol, in particular butanediol; 0.1wt.%-2wt.% of an alkyl cellulose, in particular hydroxypropyl methyl cellulose; and water.

[0100] Preparation and use The composition according to the invention may be prepared by first preparing the capsules and then suspending the hydrogel capsules in a liquid medium.

[0101] Capsules can be prepared using known methods. For example, the composition according to the present invention can be prepared as follows: 1) separately preparing a phase (A) for the shell to include all ingredients in the shell; 2) preparing phase (B) for the inner core separately to include all ingredients in the core; 3) preparing the medium separately to include all the ingredients in the medium; 4) forming capsules in the cooled base by a dropwise addition process using both phase (A) and phase (B); 5) The formed capsules are cleaned and mixed with a medium so that the capsules are suspended in the medium.

[0102] Methods for producing hydrogel capsules are well known in the art. In particular, hydrogel capsules can be prepared by phase separation utilizing different surface tensions.

[0103] For example, a three-flow concentric dripper can be used to prepare hydrogel capsules, with the center for the core phase, the middle layer for the hydrogel shell concentrically wrapping the core phase, and the outermost layer for air flow or cooling liquid.

[0104] The compositions according to the present invention may be used alone or in admixture with a cationic hair treatment system to provide improved hair conditioning benefits.

[0105] Application of the composition can be carried out on wet or dry hair.

[0106] According to a second aspect of the invention, a method for conditioning hair comprises applying to the hair a composition as described above.

[0107] In some embodiments, the method comprises the steps of mixing a composition according to the present invention with a hair composition comprising a cationic conditioning agent, and then applying the resulting mixture to the hair.

[0108] The conditioning composition comprising the cationic conditioning agent is not particularly limited. For example, it can be any of those commonly used in the art, such as distearyldimethylammonium chloride, cetyltrimethylammonium chloride, behenyitrimethylammonium chloride, behentrimontumchloride, cetyltrimethylammonium chloride, oleocetyldimethylhydroxyethylammonium chloride, stearamidopropyldimethyl(myristyl acetate)ammonium chloride; di(C1-C2 alkyl)(C12-C22 alkyl)hydroxy(C1-C2 alkyl)ammonium salts, such as dialkyldimethylammonium salts or alkyltrimethylammonium salts wherein the alkyl group preferably contains 12 to 24 carbon atoms; propane tallow diammonium chloride, behentrimethylammonium methylsulfate; and mixtures thereof.

[0109] Furthermore, the composition according to the invention can be combined with a mask which preferably contains one or more cationic conditioning agents and then placed on the hair.

[0110] The following examples are given as illustrations of the present invention and should not be construed as limiting the scope. Example Table 1 lists the main raw materials used, their trade names and suppliers. Table 1 INCI name Product Name supplier Butanediol BUTYLENE GLYCOL-1.3 KH NEOCHEM GLYCINE SOJA Oil REFINED CT SOYBEAN OIL ZOR Agar AGAR A MORISHITA JINTAN Hydroxypropyl Guar Hydroxypropyltrimonium Chloride JAGUAR C 162 SGI RHODIA (SOLVAY) Hydroxypropyl methylcellulose METHOCEL K 15 M PREMIUM DOW Biotite COLORONA BLACKSTAR GREEN MERCK

[0112] Invention Examples 1-3 Compositions according to Inventive Examples (IE.) 1-3 were prepared using the ingredients listed in Table 2 (content expressed in grams): Table 2 *Can be used with Brookhaven-type based on quasi-elastic light scattering (QELS) The particle size analyzer measures the average diameter size.

[0113] Preparation Procedure: Taking the composition of Inventive Example 1 as an example, the above composition is prepared as follows: 1) separately preparing a phase (A) for the outer shell to include water, agar, hydroxypropyl guar hydroxypropyltrimonium chloride and biotite; 2) separately preparing phase (B) for the inner core to include glycine soja oil; 3) separately preparing a liquid medium to include butylene glycol, hydroxypropyl methylcellulose and water; 4) forming capsules in the cooled base by a dropwise addition process using both phase (A) and phase (B); In particular, using a syringe pump, phase (B) is delivered to the center of a three-stream concentric dripper, phase (A) is delivered to the middle layer of the concentric dripper, a concentric liquid column is formed by phase (A), and compressed air is blown from the outermost layer of the concentric dripper to force the liquid column and phase (B) to be blown into small capsules and drip into a collection container; 5) The formed spherical capsules are cleaned and mixed with a liquid medium so that the capsules are suspended in the medium.

[0114] Evaluate The compositions prepared above were subjected to stability evaluation and sensory evaluation.

[0115] stability The stability of each composition can be evaluated based on the rapid stability test, full stability, and shake stability under extreme conditions as follows.

[0116] Stability test : Perform the following test: 1. Stability under extreme conditions • Place the samples to be tested in an oven at 50°C for 2 weeks.

[0117] Place the sample to be tested in a refrigerator at -10°C for 24 hours.

[0118] 2. Complete stability The samples to be tested were placed in ovens at 45°C, 4°C and room temperature for 2 months.

[0119] After each test, the samples were checked for their organoleptic properties: appearance, color and odor.

[0120] The sample was considered stable if there was no separation between the capsule and the medium and no changes in the sensory properties.

[0121] Shake stability The samples to be tested were filled in plastic boxes and placed on a shake plate during a period of 60 minutes.

[0122] After the test is finished, open the sample and check the capsule for any rupture. White color indicates that the capsule has ruptured due to emulsification between the oil in the core and the liquid medium. Repeat the test 2 times.

[0123] The results of the stability tests are summarized in Table 3. Table 3 IE.2 Stability under extreme conditions Stablize Complete stability Stablize Shake stability No color change

[0124] In vivo expert sensory assessment A half-head comparison between the combination of each composition of Inventive Examples 1 to 3 and a hair mask (available as Kerastase Chronologiste Mask from L'Oréal) and the combination of a commercial product marketed by Kérastase under the name Kérastase Perles de caviar Chronologiste (which comprises agar beads suspended in a hydrogel) and the same hair mask was conducted in the following manner: 6 models (women aged 30-50 with moderate to high hair damage) were invited to put the composition to be tested on the hair mask, mix the beads in the hair mask, and then apply the hair mask containing the composition to be tested on their heads, half using the composition of the Inventive Examples to be evaluated and the other half using the commercial product, and hair experts (salon hairdressers from Kérastase Salon and R&I) were asked to provide feedback on use and makeup performance.

[0125] The sensory evaluation results show that the compositions of the present invention provide improved conditioning benefits over commercial products.

[0126] Using the compositions according to the invention (especially using compositions IE.2 and IE.3), mixing of the beads with the hair mask is easier.

[0127] The resulting inventive composition after mixing is more homogeneous and has no beads remaining, thus making the step of applying to the hair easier. The resulting inventive mixture is also easier to rinse.

[0128] It can be seen that the composition according to the present invention is stable and can provide conditioning benefits to the hair. At the same time, the composition according to the present invention can be easily and evenly applied to the hair and easily rinsed off.

Claims

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

2. The composition according to claim 1, wherein the oil is a triglyceride oil having the following formula (I): CH2(OOCR1)CH(OOCR2)CH2(OOCR3) (I) Wherein R1, R2 and R3 are independently selected from C6-C 30 Alkyl and C6-C 30 Preferably, R1, R2 and R3 are independently selected from C6-C 20 Alkyl and C6-C 20 More preferably, R1, R2 and R3 are independently selected from C6-C 12 Alkyl and C6-C 12 alkenyl, the alkyl or alkenyl is straight chain or branched, Preferably, the triglyceride is selected from peanut oil, sesame oil, avocado oil, coconut oil, cocoa butter oil, almond oil, safflower oil, corn oil, cottonseed oil, olive oil, jojoba oil, palm oil, soybean oil, wheat germ oil, linseed oil, sunflower oil, and combinations thereof.

3. The composition according to claim 1 or 2, wherein the oil is present in an amount ranging from 3 wt.% to 40 wt.%, more preferably from 5 wt.% to 35 wt.%, most preferably from 8 wt.% to 25 wt.%, relative to the total weight of the composition.

4. The composition according to any one of claims 1 to 3, wherein the sugar units included in the polysaccharide thickener are 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.

5. The composition according to any one of claims 1 to 4, wherein the polysaccharide thickener is selected from agar, guar gum, and combinations of these compounds, and these polysaccharide gums are optionally modified by heat treatment, esterification, etherification, amidation or oxidation. Preferably, the polysaccharide thickener is selected from agar, hydroxypropyl guar hydroxypropyl trimethyl ammonium chloride, and combinations thereof.

6. The composition according to any one of claims 1 to 5, wherein the polysaccharide thickener is selected from: a) Exudates from trees or shrubs, including: Gum Arabic; Gum jelly; karaya gum; Gum tragacanth; b) Gums derived from algae, including: agar; alginates; carrageenan and furcellan; c) gums derived from seeds or tubers, including: guar gum; locust bean gum; fenugreek gum; tamarind gum; konjac gum; and d) Microbial gums, including: xanthan gum; gellan gum; scleroglucan gum, And the polysaccharide thickener is optionally physically modified or chemically modified, preferably modified by heat treatment, esterification reaction, etherification reaction, amidation reaction or oxidation reaction.

7. The composition according to any one of claims 1 to 6, wherein the polysaccharide thickener is present in an amount ranging from 0.05 wt.% to 2 wt.%, preferably from 0.1 wt.% to 1.5 wt.%, more preferably from 0.2 wt.% to 1.0 wt.%, relative to the total weight of the composition.

8. The composition of any one of claims 1 to 7, wherein the hydroalcoholic medium comprises a polyol.

9. The composition of claim 8, wherein the polyol has 2-10 carbon atoms, 3-10 carbon atoms, more preferably 3-8 carbon atoms, even more preferably, the polyol is selected from hexylene glycol, butylene glycol, propylene glycol, dipropylene glycol, glycerol, and combinations thereof.

10. The composition according to any one of claims 1 to 9, wherein the polyol is present in an amount ranging from 2 wt.% to 50 wt.%, more preferably from 4 wt.% to 40 wt.%, most preferably from 4 wt.% to 20 wt.%, relative to the total weight of the composition.

11. A composition according to any one of claims 1 to 10, further comprising at least one alkyl cellulose as a hydrophilic thickener in the liquid medium, preferably selected from (C1-C4) alkyl cellulose; (poly) hydroxy (C1-C4) alkyl cellulose, such as hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl cellulose; mixed (poly) hydroxy (C1-C4) alkyl (C1-C4) alkyl cellulose, such as hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, hydroxyethyl ethyl cellulose and hydroxybutyl methyl cellulose, and combinations thereof.

12. The composition according to claim 11, wherein the hydrophilic thickener is present in an amount ranging from 0.05 wt.% to 5 wt.%, preferably from 0.1 wt.% to 3 wt.%, more preferably from 0.1 wt.% to 2 wt.%, relative to the total weight of the composition.

13. The composition of claim 1, comprising a hydrogel capsule suspended in a liquid medium, wherein the capsule comprises, relative to the total weight of the composition: a) a kernel comprising 8 wt.% to 25 wt.% soybean oil; and b) a shell comprising 0.1 wt.% to 1 wt.% of agar and 0.05 wt.% to 1 wt.% of hydroxypropyl guar hydroxypropyltrimonium chloride and water; The liquid medium contains 2wt.%-40wt.% of polyol and 0.1wt.%-2wt.% of alkyl cellulose.

14. The composition according to any one of claims 1-13, wherein the particle size of the hydrogel capsule is 0.3-15 mm, preferably 1-10 mm, more preferably 2-6 mm, and preferably the thickness of the shell is 0.1-2 μm, preferably 0.1-1.5 μm.

15. The composition according to any one of claims 1 to 14, wherein the weight ratio of the capsule to the medium is 10:90-40:60, preferably 20:80-40:

60.

16. A method for conditioning hair comprising applying to the hair a composition according to any one of claims 1 to 15.

17. The method according to claim 16, comprising the steps of: A composition according to any one of claims 1 to 15 is mixed with a hair composition comprising a cationic conditioning agent, and the obtained mixture is then applied to the hair.

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