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    • 专利摘要:
    hair care composition and process for manufacturing the hair care composition the present invention relates to a hair care composition comprising cationic deposition polymer and discrete dispersed droplets of a water-insoluble conditioning agent, in which the cationic deposition polymer comprises at least 90% by weight of cationically modified guar by weight of the cationic deposition polymer, and where the cationically modified guar comprises first cationically modified guar polymer with a charge density greater than 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol, and second cationically modified guar polymer with a charge density of 0.8 to 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol.
    公开号:BR112016006475B1
    申请号:R112016006475-5
    申请日:2014-10-01
    公开日:2020-08-04
    发明作者:Amit Jayaswal；Yingying Pi；Zhengrong Li
    申请人:Unilever Nv；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF THE INVENTION
    [001] This invention relates to hair care compositions containing conditioning agent and cationic deposition polymer. In particular, the present invention relates to hair care compositions comprising a combination of cationic deposition polymers. In addition, the present invention also relates to the use of such hair care compositions to provide hair cleaning and conditioning benefits. BACKGROUND OF THE INVENTION
    [002] Compositions for hair care that provide a combination of cleaning and conditioning benefits to the hair are known in the art. Such compositions typically comprise one or more cleaning anionic surfactants in combination with one or more conditioning agents. Typically, the most popular conditioning agents used in hair care compositions are water-insoluble oily materials, such as mineral oils, naturally occurring oils, such as triglycerides and silicone polymers. The conditioning benefit is achieved by the oily material being deposited on the hair, resulting in the formation of a film, which makes the hair easier to comb when wet and more malleable when dry.
    [003] Cationic polymers are often used to increase the deposition of the conditioning agent on the hair. These polymers can be synthetic or natural polymers that have been modified with cationic substituents.
    [004] A problem associated with the use of cationic deposition polymers is that it is difficult to obtain a desirable hair sensation and appearance of the hair, while maintaining high conditioning benefits. For example, some cationic polymers are effective in improving the sensory attributes of wet hair during the wash and rinse phases, but provide an undesirable hair feeling after drying, such as heavy, oily, coating feeling or hair volume significantly. reduced that many consumers experience when high charge density cationic polymers and oily conditioning agents are combined in hair care compositions.
    [005] The present inventors have recently recognized a need to develop a hair care composition that can provide high conditioning benefits, while maintaining a pleasant feeling to the hair after drying. It was found that this need can be satisfied by using a combination of two cationic polymers of molecular weight and specific cationic charge densities in a hair care composition, which also comprises small droplets of a water-insoluble oil conditioning agent. . In addition, the hair care composition of the present invention demonstrates efficiency of unchanged deposition of anti-dandruff active ingredients on the scalp, indicating that it can also be used for anti-dandruff purposes. DEFINITIONS DEGREE OF SUBSTITUTION
    [006] "Degree of substitution", as used herein, refers to the average number of moles of cationic groups per mole of sugar unit. The degree of substitution (DS) is measured using 1H NMR in a mixture solvent of deuterium oxide (D2O) and deuterium chloride (DCI). For example, the hydroxylpropyltrimonyium chloride DS is measured using 1H NMR and the spectrum is recorded at 25 ° C. The peak corresponding to the nine methyl protons of the quaternary ammonium group in guar units, which appears between 3.1-3.3 ppm, is integrated as A1. The multiplet of peaks corresponding to the anomeric protons in the sugar ring and protons in CH2 and CH groups of the cationic substituent, which appear between 3.3-4.5 ppm, are also integrated as A2. Therefore, the DS for the case of the 2,3-epoxypropyltrimethylammonium chloride cationizing agent can be calculated as follows:
    CATIONIC LOAD DENSITY
    [007] "Cationic charge density", as used herein, refers to the number of cationic charges per unit weight of a given polymer. The cationic charge density can be calculated from the degree of substitution as described in WO 2013/011122, the disclosure of which is thus incorporated by reference in its entirety, but especially page 8 lines 8-17. For example, for cationically modified guar polymer obtained by reaction with 2,3-epoxypropyltrimethylammonium chloride, the cationic charge density can be calculated from the DS, using the following equation: Cationic charge density in milliequivalents per gram (meq / g) =
    HIGH DENSITY CHARACTERISTIC POLYMER
    [008] "High charge density cationic polymer", as used herein, refers to cationic polymers that have cationic charge densities of more than 1.2 meq per gram. INSOLUBLE IN WATER
    [009] "Insoluble in water", as used herein, refers to the solubility of a material in water at 25 ° C and the atmospheric pressure being 0.1% by weight or less. MOLECULAR WEIGHT
    [010] "Molecular weight", as used herein, refers to the average molecular weight by weight of a given polymer, preferably measured by SEC-MALS (Size Exclusion Chromatography with detection by Multi-Angle Light Dispersion detection ), as described in WO 2013/011122, the description of which is incorporated herein by reference in its entirety, especially page 3 lines 11-18. VARIED
    [011] Except in the examples, or when explicitly indicated, all numbers in this description indicating quantities of material or reaction conditions, physical properties of materials and / or use can optionally be understood as modified by the word "about".
    [012] All quantities are by weight of the final hair care composition, unless otherwise specified.
    [013] It should be noted that in specifying any value ranges, any particular upper value can be associated with any particular lower value.
    [014] For the avoidance of doubt, the word "understand" means to "include", but not necessarily "consist of" or "composed of". In other words, the steps or options listed need not be exhaustive.
    [015] The description of the invention as found herein should be considered to encompass all embodiments found in the claims to be multiply dependent on each other, regardless of the fact that the claims can be found without multiple dependency or redundancy .
    [016] Whenever a feature is described with respect to a particular aspect of the present invention (for example, a composition of the present invention), that description also to be considered for application to any other aspect of the invention (for example, a method of invention), mutatis mutandis. SUMMARY OF THE INVENTION
    [017] In a first aspect, the present invention is related to a hair care composition comprising: cationic deposition polymer; and discrete dispersed droplets of a water-insoluble conditioning agent; wherein the cationic deposition polymer comprises at least 90% by weight of cationically modified guar by weight of the cationic deposition polymer, and where the cationically modified guar comprises: (i) first cationically modified guar polymer with a higher charge density than 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; and (ii) second cationically modified guar polymer with a charge density of 0.8 to 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol.
    [018] In a second aspect, the present invention is directed to a packaged hair care product comprising the hair care composition of the first aspect of this invention.
    [019] In a third aspect, the present invention is directed to a process for the manufacture of any embodiment of the hair care composition of the first embodiment comprising the steps of: i) selecting the first guar cationically polymer modified having a charge density greater than 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; ii) selecting the second cationically modified polymer having a charge density of 0.8 to 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; iii) combining the first and second cationically modified polymers with discrete droplets of a water-insoluble conditioning agent.
    [020] In a fourth aspect, the present invention relates to a hair care composition that can be obtained and / or obtained by a process of the third aspect.
    [021] In a fifth aspect, the present invention is directed to a method of using a hair care composition of the first aspect of the present invention to provide high conditioning benefits while maintaining a pleasant sensation in the hair after drying.
    [022] All other aspects of the present invention will be more readily apparent when considering the detailed description and examples that follow. DETAILED DESCRIPTION
    [023] It has now been found that a hair care composition comprising a combination of two cationic polymers of specific molecular weight and cationic charge densities together with small droplets of a water-insoluble oily conditioning agent can provide high health benefits. conditioning the hair, while still maintaining a pleasant sensation in the hair after drying. In addition, the hair care composition of the present invention can also be used for anti-dandruff purposes. Cationic deposition polymers
    [024] The cationic polymer suitable for use in the compositions of the present invention comprises cationically modified guar polymers such as hydroxypropyltrimonyium chloride guar, which is, for example, commercially available from Rhodia in its JAGUAR trademark series.
    [025] In general, for cationic polysaccharide polymers, the hydroxyl groups of the unmodified monomeric sugar ring units are the locations for cationic substitution. Degree of substitution (DS) is typically in the range 0 to 3, due to the fact that the monomeric sugar unit of most polysaccharides has an average of three hydroxyl groups available for substitution. In addition to DS, the cationic charge in polymers can also be quantified as cationic charge density. DS was previously determined by different methods. For example, the cationic charge density of the polymer was, in some cases, calculated based on a percentage nitrogen content determined by the Kjeldahl method, as described in the American Pharmacopoeia under chemical tests for nitrogen determination and is expressed in milliequivalents (meq) per gram. The cationic charge density of the polymer in the present invention is, however, calculated from the degree of substitution, which is measured by 1H NMR in a mixture solvent of deuterium oxide (D2O) and deuterium chloride (DCI).
    [026] In many cases, the DS obtained from 1H NMR measurements may not be suitable to be compared with that obtained from the Kjeldahl method, due to the fact that the two methods are influenced by different factors.
    [027] The cationic deposition polymer according to the invention comprises a combination of two cationic polymers. The two cationic polymers are polymers of guar cationically modified in an amount of at least 90% by weight of the cationic deposition polymer, more preferably at least 95%, even more preferably at least 98% and most preferably the cationic deposition polymer consists of ( or at least essentially consists) of cationically modified guar polymers.
    [028] The first cationically modified guar polymer suitably has a charge density of at least 1.2 meq per gram, preferably 1.3 to 1.8 meq per gram. Suitably, the first cationically modified polymer has an average molecular weight of at least 1,000,000 grams per mole, preferably from 1.1 to 3,000,000 grams per mole. An example of such a polymer is described as a polymer 2 in Table 1 of WO 2013/011122. The second cationically modified guar polymer has a charge density of 0.8 to 1.2 meq per gram, preferably 0.9 to 1.1 meq per gram. Suitably, the second cationically modified guar polymer has an average molecular weight of at least 1,000,000 grams per mole, preferably 1.5 to 3,000,000 grams per mole. A specific example of such a polymer is JAGUAR C17.
    [029] Typically, the hair care composition of the present invention comprises the first guar cationically modified polymer in an amount of 0.001 to 1% by weight of the hair care composition, preferably from 0.005 to 0.8%, more preferably from 0.01 to 0.5%, more preferably from 0.03 to 0.3%, based on the total weight of the hair care composition and including all ranges included therein.
    [030] Typically, the hair care composition of the present invention comprises the second cationically modified polymer in an amount of 0.001 to 1% by weight of the hair care composition, preferably from 0.005 to 0.8%, more preferably from 0.01 to 0.5%, more preferably from 0.03 to 0.3%, based on the total weight of the hair care composition and including all ranges included therein.
    [031] Generally, the hair care composition of the present invention comprises the first and second cationically modified polymers in a total amount of 0.002 to 2% by weight of the hair care composition, preferably 0.01 at 1.6%, more preferably from 0.02 to 1%, more preferably from 0.06 to 0.6%, based on the total weight of the hair care composition and including all ranges included therein.
    [032] The relative weight ratio of the first cationically modified guar polymer to the second cationically modified guar polymer in the hair care composition of the present invention can vary from 1:15 to 15: 1, preferably from 1:10 to 10 : 1, more preferably from 1: 5 to 5: 1.
    [033] In addition to the first and second cationic guars, the deposition polymer may comprise a smaller amount of other cationic polymers. The other cationic polymer can be a homopolymer or be formed from two or more types of monomers. The molecular weight of the polymer generally ranges from 5,000 to 10,000,000 grams per mol, typically at least 10,000 and preferably from 100,000 to 2,000,000. The polymers will have groups containing cationic nitrogen, such as quaternary ammonium or protonated amino groups, or a mixture of them.
    [034] The cationic nitrogen-containing group will generally be present as a substituent in a fraction of the total cationic polymer monomer units. The ratio of cationic to non-cationic monomer units is selected to obtain polymers with a cationic charge density in the required range.
    [035] Other suitable cationic polymers include, for example, copolymers of vinyl monomers having cationic amine or quaternary ammonium functionalities with water-soluble spacer monomers such as (meth) acrylamide, alkyl and dialkyl (meth) acrylamides, (meth) alkyl acrylate, vinyl caprolactone and vinyl pyrrolidine. The substituted alkyl and dialkyl monomers preferably have C1-C7 alkyl groups, more preferably C1-3 alkyl groups. Other suitable spacers include vinyl esters, vinyl alcohol, maleic anhydride, propylene glycol and ethylene glycol. Preferably, the additional cationic polymer is cationic polysaccharide polymers, such as cationic cellulose derivatives, cationic starch derivatives and mixtures thereof. CONDITIONING AGENT
    [036] The hair care composition of the present invention comprises a water-insoluble conditioning agent to improve conditioning performance. Preferably, the conditioning agent is non-volatile, which means that it has a vapor pressure of less than 1000 Pa at 25 ° C.
    [037] Preferably, the hair care composition comprises discrete dispersed droplets of a water-insoluble conditioning agent, which has an average droplet diameter (Ü3.2) of less than 15 microns, preferably less than 10 microns, more preferably less than 5 microns, more preferably less than 3 microns. The average droplet diameter (Ü3.2) of a water-insoluble conditioning agent can be measured using a laser light scattering technique, for example, using a 2600D Particle Sizer from Malvern Instruments.
    [038] The water-insoluble conditioning agent may include non-silicone conditioning agent comprising oily or fatty non-silicone materials, such as hydrocarbon oils, fatty esters and mixtures thereof. Preferably, the water-insoluble conditioning agent is emulsified silicone oil.
    [039] Suitable silicones include polydiorganosiloxanes, in particular polydimethylsiloxanes which bear the designation CTFA dimethicone. Also suitable for use in compositions of the present invention (in particular shampoos and conditioners) are polydimethyl siloxanes with hydroxyl end groups, which bear the designation CTFA dimethicone. Also suitable for use in compositions of the present invention are silicone gums with a slight degree of cross-linking, as described, for example, in WO 96/31188. Preferably, the silicone oil comprises dimethicone, dimethicone, or a mixture thereof.
    [040] The viscosity of the emulsified silicone itself (not the emulsion or the final hair care composition) is typically at least 10,000 cSt (centi-Stokes = mm2> S'1) at 25 ° C, preferably at least 60,000 cSt, more preferably at least 500,000 cSt, preferably at least 1,000,000 cSt. Preferably, the viscosity does not exceed 109 cSt for ease of formulation. Suitable methods for measuring the kinematic viscosity of silicone oils are known to those skilled in the art, for example, capillary viscometers. For high viscosity silicones, a constant voltage rheometer can be used to measure viscosity.
    [041] Emulsified silicones suitable for use in the hair care compositions of the present invention are available as preformed silicone emulsions from silicone suppliers such as Dow Corning and GE Silicones. The use of such a preformed silicone emulsion is preferred for ease of processing and controlling the particle size of silicone. Such preformed silicone emulsions will typically additionally comprise a suitable emulsifier, and can be prepared by a chemical emulsification process, such as emulsion polymerization, or by mechanical emulsification using a high-shear mixer.
    [042] Examples of suitable preformed silicone emulsions include DC1785, DC1788, DC7128, all available from Dow Corning. These are dimethicone / dimethicone emulsions.
    [043] Another class of silicones that can be used are functionalized silicones, such as functional amino silicones, that is, a silicone containing at least one primary, secondary or tertiary amine group, or a quaternary ammonium group. Examples of suitable amino functional silicones include polysiloxanes with the CTFA designation "amodimethicone".
    [044] Preferably, droplets of silicone emulsion are mixed with certain types of block polymers active on the surface of a high molecular weight to form silicone emulsions, as described, for example, in WO 03/094874. A preferred form of the surfactant block polymer having polyoxypropylene and polyoxyethylene groups as the hydrophobic and hydrophilic part, respectively, has formula I and has the designation CTFA poloxamer, known commercially under the trade name "Pluronic" from BASF. I) HO (CH2CH2O) x (CH (CH3) CH2O) y (CH2CH2O) xH
    [045] Suitably, the average value of x in formula I is 4 or more, preferably 8 or more, more preferably 25 or more, even more preferably 50 or more, and more preferably 80 or more. The average value of x is typically not greater than 200. Suitably, the average value of y is 25 or more, preferably 35 or more, more preferably 45 or more, and more preferably 60 or more. The average value of y is typically not more than 100.
    [046] Another preferred form of the surfactant block polymer is according to formula II and has the designation CTFA Poloxamine. These are commercially available under the BASF trade name “Tetronic”. ll) (HO (CH2CH2O) to (CH (CH3) CH2O) b) 2-N-CH2-CH2-N- ((OCH2CH (CH3)) b (OCH2CH2) aOH) 2
    [047] Suitably, the average value of a is 2 or more, preferably 4 or more, more preferably 8 or more, even more preferably 25 or more, and more preferably 40 or more. The average value of a is typically not greater than 200. The average value of b is suitably 6 or more, preferably 9 or more, more preferably 11 or more, and most preferably 15 or more. The average value of b is typically not more than 50.
    [048] Preferably, the surfactant block polymer is poloxamer and / or poloxamine, more preferably, the surfactant block polymer is poloxamer.
    [049] Preferably, the surfactant block polymer is mixed with dimethicone. The weight ratio of dimethicone to surfactant block polymer in the mixture is preferably in the range of 2: 1 to 200: 1, more preferably from 5: 1 to 50: 1, even more preferably from 10: 1 to 40: 1, more preferably from 15: 1 to 30: 1.
    [050] The water-insoluble conditioning agent is generally present in the hair care composition of the present invention in an amount of 0.05 to 15%, preferably 0.1 to 10%, more preferably 0.5 to 8%, more preferably 1 to 5%, based on the total weight of the hair care composition and including all ranges included therein. CLEANING SURFACE
    [051] In a preferred embodiment, the hair care composition according to the invention comprises one or more cleaning surfactants. Preferably, the cleaning surfactants are anionic surfactants.
    [052] Examples of suitable anionic cleaning surfactants are alkyl sulfates, alkyl sulfate ether, alkaryl sulfonates, alkanoyl isethionates, alkyl succinates, alkyl sulfosuccinates, alkyl sulfosuccinates, N-alkyl sarcosinates, N-alkyl phosphates alkyl, ether alkyl phosphates and alkyl ether carboxylic acids and their salts, especially their sodium, magnesium, ammonium and mono-, di- and triethanolamine salts. The alkyl and acyl groups generally contain 8 to 18, preferably 10 to 16 carbon atoms and can be unsaturated. The alkyl sulfate ether, alkyl sulfosuccinate ether, alkyl phosphate ether and alkyl ether carboxylic acids and their salts may contain from 1 to 20 units of ethylene oxide or propylene oxide per molecule.
    [053] Typical anionic cleansing surfactants for use in hair care compositions of the present invention include sodium oleyl succinate, ammonium lauryl sulfosuccinate, sodium lauryl sulfate, sodium lauryl ether sulfate, sodium lauryl ether sulfate, sodium lauryl sulfate ammonium, ammonium lauryl ether sulfate, sodium dodecylbenzene sulfonate, triethanolamine dodecylbenzene sulfonate, sodium cocoyl isethionate, sodium lauryl isethionate, lauryl ether carboxylic acid and sodium N-lauryl sarcosinate.
    [054] Preferred anionic surfactants are alkyl sulfates and alkyl ether sulfates. These materials have the respective formulas R2OSO3M and RIO (C2H4O) XSO3M, where R2 is alkyl or alkenyl with 8 to 18 carbon atoms, x is an integer having a value from about 1 to about 10, and M is a cation such as ammonium, alkanolamines such as triethanolamine, monovalent metals such as sodium and potassium, and polyvalent metal cations such as magnesium and calcium. More preferably, R2 has 12 to 14 carbon atoms, in a straight chain instead of a branched chain.
    [055] Preferred anionic cleaning surfactants are selected from sodium lauryl sulfate and sodium lauryl ether (n) EO, (where n is 1 to 3); more preferably sodium lauryl ether (n) EO, (where n is 1 to 3); more preferably sodium lauryl ether (n) EO sodium where n = 1.
    [056] Generally, the total amount of cleaning surfactant in the hair care composition of the present invention ranges from 0.5 to 45%, more preferably from 1.5 to 30%, more preferably from 5 to 20%, based on in the total weight of the hair care composition and including all the intervals included therein.
    [057] In an especially preferred embodiment, the hair care composition may further comprise co-surfactants, such as amphoteric and zwitterionic surfactants to provide smoothness to the composition.
    [058] Examples of amphoteric or zwitterionic surfactants include alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulfobetaines (sultaines), alkyl glycinates, alkyl carboxyglycinates, alkyl amphacetates, alkyl amphoterates, alkylaminoxylates, aminosulphonylsulfanylsulfanylsulfanylsulphylamides acyl taurates and acyl glutamates, where the alkyl and acyl groups have 8 to 19 carbon atoms. Typical amphoteric and zwitterionic surfactants for use in the compositions of the invention include lauryl amine oxide, cocodimethyl sulfopropyl betaine, lauryl betaine, cocoamidopropyl betaine and sodium cocoanfoacetate. Preferably, the co-surfactant is cocoamidopropyl betaine (CAPB).
    [059] Typically, the co-surfactant can be present in hair care compositions of the present invention in an amount of 0.5 to 8% by weight of the hair care composition, preferably 1 to 4 % based on the total weight of the hair care composition and including all ranges included. ANTICASPA ASSETS
    [060] In an especially preferred embodiment, the hair care composition comprises anti-dandruff agents. Anti-dandruff agents are compounds that are active against dandruff and are typically antimicrobial agents and preferably antifungal agents.
    [061] Suitable anti-dandruff agents include compounds selected from azole-based antifungal agents, octopirox, pyrithione metal salts, selenium sulfide and mixtures thereof. The preferred azole-based antifungal agents are ketoconazole and climbazole. Preferred pyrithione metal salts are zinc, copper, silver and zirconium pyrithione. Most preferred are anti-dandruff active ingredients in zinc pyrithione particles and selenium sulfide.
    [062] Typically, the hair care composition of the present invention comprises anti-dandruff agent in an amount ranging from 0.01 to 10%, preferably from 0.05 to 5%, more preferably from 0.1 to 2% , based on the total weight of the hair care composition and including all ranges included here. OTHER INGREDIENTS
    [063] The hair care composition of the present invention can contain other ingredients that are common in the art to improve physical properties and performance. Suitable ingredients include, but are not limited to fragrance, suspending agents, dyes and pigments, pH adjusting agents, teenagers or opacifiers, viscosity modifiers, thickeners, preservatives, antimicrobial agents and natural hair nutrients such as plants, hair extracts. fruit, sugar derivatives and amino acids.
    [064] The compositions of the invention are primarily intended for topical application to the scalp and / or at least part of an individual's hair, either in a rinse-free or leave-on composition, for the treatment of dry and / or dry hair. moist, damaged and / or difficult to control.
    [065] The following examples are provided to facilitate an understanding of the present invention. The examples are not provided to limit the scope of the claims. EXAMPLES
    [066] The compositions were prepared according to the formulations described in Table 1. All ingredients are expressed by the amount of active ingredient in percentage by weight of the composition.
    [067] Jaguar C17 is a commercial cationic guar from Rhodia that has a molecular weight of 2,000,000 g / mol and a cationic charge density of 1.0 meq / g.
    [068] HD1 is a high charge density (HD) cationic guar manufactured by Rhodia, which has a molecular weight of 1,200,000 g / mol and a cationic charge density of 1.4 meq / g, similar to polymer 2 described in Table 1 of WO 2013/011122.
    [069] HD2 is an HD guar manufactured by Rhodia, which has a molecular weight of 370,000 g / mol and a cationic charge density of 1.4 meq / g, similar to polymer 4 described in Table 1 of WO 2013/011122 .
    [070] DC1788 is a commercial dimethiconol from Dow Corning that has a particle size of 0.2 pm.
    [071] DC7128 is a commercial dimethicone pre-mixed with poloxamer from Dow Corning, which has a particle size of 10 pm.
    [072] DM is a dimethicone pre-mixed with poloxamer manufactured by Dow Corning that is similar to DC7128, but with a particle size of 2 pm. TABLE 1

    EXAMPLE 1
    [073] This example demonstrates the deposition of silicone, accumulation of silicone in hair samples, dry friction of hair and volume of hair after treatment with hair care compositions. METHODS SILICON DEPOSITION AND SILICON ACCUMULATION
    [074] Hair strands were soaked in sodium lauryl ether sulfate (SLES) for a few minutes before being thoroughly washed under running water. The strands of hair were combed until the fibers were aligned and then left to dry overnight.
    [075] The locks of hair were then held together and pre-moistened with water, followed by removal of excess water. Shampoo was applied to the five strands, and the strands were soaped to incorporate the shampoo evenly. The strands were rinsed under running water before removing excess water. For the measurement of silicone deposition, the steps of shampooing and rinsing with water were repeated once more. But, to measure the silicone accumulation, the same steps were repeated eight times. The ratio of silicone deposition after eight washes to silicone deposition after one wash was recorded as silicone accumulation in Table 2. The hair strands were combed until the fibers were aligned, and dried overnight for measurement. DRY FRICTION OF HAIR
    [076] The strand of hair was fixed on the bed of the texture analyzer (TA) to ensure a flat surface with little or no dispersed hair fiber. The probe cylinder covered with a rubber glove was mounted on the probe arm and lowered onto the wick. 500 grams of weight were placed on the platform of the probe arm and the force used to move the probe arm together with the lock of hair was recorded. HAIR VOLUME
    [077] The volume of the strands of hair after washing was determined quantitatively using an instrumental method. This involved taking images of each wick held in a vertical position under controlled lighting conditions and subjecting the resulting images to image analysis. TABLE 2

    The. NM means that data is not measured. RESULTS
    [078] Table 2 shows that Sample 2 with a high level of guar HD had a comparable amount of silicone accumulation and volume of hair comparable to Sample 1, but less dry friction of the hair, which demonstrated that Sample 2 had clean parity performance with Sample 1, but provided better conditioning benefits. Sample 4 with a lower level of guar HD had dry friction of the hair comparable to Sample 1, but less silicone accumulation and greater volume of hair, which demonstrated that sample 4 had par hair conditioning performance with Sample 1, but better cleaning benefits. Sample 5, where only guar HD was present, demonstrated better conditioning performance than Sample 1, but not for Sample 2, in terms of dry friction of the hair. EXAMPLE 2
    [079] This example demonstrates the effect of different conditioning agents on hair care compositions.
    [080] Two formulations with the same ratio of cationic guar, but different conditioning agent were evaluated by 36 consumers. The results of the assessment are shown in Table 3 and are significant at the 99% confidence level. TABLE 3


    [081] The numbers listed in the table are the number of consumers who agreed with the statement. The data clearly shows that Sample 3 which had a dimethicone with a particle size of 2 pm provided superior wet and dry conditioning performance than Sample 2, which had a larger size silicone. This trend was consistent across all different hair types. Consumers expressed a clear preference for Sample 3 as to its conditioning benefits.
    [082] A similar consumer study was carried out for Samples 1 and 3. The results are summarized in Table 4 and are significant at the 99% confidence level. TABLE 4



    [083] The data demonstrated that Sample 3 also provided significantly better wet and dry conditioning benefits compared to Sample 1. EXAMPLE 3
    [084] This example demonstrates the cleaning benefits of compositions comprising guar HD and silicone.
    [085] Sample 4 comprising guar HD and a greater amount of silicone was compared with a reference formulation Sample 6 comprising only a cationic guar (Jaguar C17) and a lesser amount of silicone.
    [086] Each formulation was rated by 100 users for a set of performance attributes and the attributes shown in Table 5 show significant differences at the 95% confidence level. The recorded numbers were the percentage of people who gave a positive answer regarding specific attributes in a specific formulation. TABLE 5

    [087] It is known that silicones are conditioning agents, which are deposited on the hair. But accumulation of silicone deposition can lead to poor cleaning performance. Surprisingly, Sample 4 with the highest amount of silicone outperformed Sample 6 in cleaning performance. Sample 4 was preferred over the reference in cleaning hair and scalp. EXAMPLE 4
    [088] This example demonstrates the deposition of anti-dandruff agent zinc pyrithione (ZnPTO) on the scalp.
    [089] In vitrified skin was treated with shampoo and water, washed by hand rubbing with a plastic stick, then the liquid was removed. The washing process was repeated once more using water followed by removal of the liquid. The vitrified skin was then left to dry overnight. The deposition of ZnPTO on the skin in glass was measured by X-ray fluorescence (XRF). The results are shown in Table 6 and Table 7. TABLE 6
    TABLE 7

    [090] The data in Table 6 and Table 7 demonstrate that the incorporation of guar HD in a hair care composition did not affect the deposition of ZnPTO. The deposition of ZnPTO remained consistent even for Sample 5, where only guar HD was present. However, Sample 7 comprising HD2 which had the same charge density as HD1, but a much lower molecular weight, showed lower ZnPTO deposition.
    权利要求:
    Claims (16)
    [0001]
    1. HAIR CARE COMPOSITION, characterized by comprising: a) cationic deposition polymer; and b) discrete dispersed droplets of a water-insoluble conditioning agent; wherein the cationic deposition polymer comprises at least 90% by weight of cationically modified guar by weight of the cationic deposition polymer, and where the cationically modified guar comprises: (i) first cationically modified guar polymer having a higher charge density than 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; and (ii) second cationically modified polymer having a charge density of 0.9 to 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; wherein the composition additionally comprises a surface surfactant block polymer selected from poloxamer or poloxamine; wherein the composition comprises particulate anti-dandruff agents; where the cationic charge density is calculated from the degree of substitution using the following equation: cationic charge density in milliequivalents per gram
    [0002]
    COMPOSITION according to claim 1, characterized in that the charge density of the second cationically modified polymer is from 0.9 to 1.1 meq / g.
    [0003]
    COMPOSITION according to any one of claims 1 to 2, characterized in that the molecular weight of the second cationically modified polymer is 1.5 to 3,000,000 g / mol.
    [0004]
    COMPOSITION according to any one of claims 1 to 3, characterized in that the charge density of the first cationically modified polymer is 1.3 to 1.8 meq / g.
    [0005]
    COMPOSITION according to any one of claims 1 to 4, characterized in that the molecular weight of the first cationically modified polymer is from 1.1 to 3,000,000 g / mol.
    [0006]
    6. COMPOSITION according to any one of claims 1 to 5, characterized in that the composition comprises the first cationically modified guar polymer and the second cationically modified guar polymer in a weight ratio (first: second) from 1:10 to 10 :1.
    [0007]
    COMPOSITION according to any one of claims 1 to 6, characterized in that the composition comprises the first and second cationically modified polymers in a total amount of 0.02 to 1% by weight of the composition.
    [0008]
    COMPOSITION according to any one of claims 1 to 7, characterized in that the droplets of conditioning agent have an average diameter (D3.2) of less than 5 microns, and in which the average droplet diameter (D3.2) ) of a water-insoluble conditioning agent to be measured using a laser light scanning technique.
    [0009]
    COMPOSITION according to any one of claims 1 to 8, characterized in that the conditioning agent comprises silicone oil, preferably dimethicone, dimethicone, or a mixture thereof.
    [0010]
    COMPOSITION according to any one of claims 1 to 9, characterized in that the composition comprises surfactant block polymer, preferably poloxamer.
    [0011]
    COMPOSITION according to any one of claims 1 to 10, characterized in that the block polymer is mixed with silicone oil, preferably dimethicone.
    [0012]
    COMPOSITION according to any one of claims 1 to 11, characterized in that the composition comprises the water-insoluble conditioning agent in an amount of 0.1 to 10% by weight of the composition.
    [0013]
    13. COMPOSITION according to any one of claims 1 to 12, characterized in that the composition comprises particulate anti-dandruff agent, preferably pyrithione metal particulate salt.
    [0014]
    COMPOSITION according to any one of claims 1 to 13, characterized in that the composition comprises particulate anti-dandruff agent in an amount of 0.05 to 5% by weight of the composition.
    [0015]
    COMPOSITION according to any one of claims 1 to 14, characterized in that the composition comprises anionic cleaning surfactant, preferably in an amount ranging from 5 to 20% by weight of the composition for hair care.
    [0016]
    16. PROCESS FOR MANUFACTURING THE COMPOSITION FOR HAIR CARE, as defined in any one of claims 1 to 15, characterized by the process comprising the steps of: i) selecting the first guar cationically modified polymer having a charge density greater than 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; ii) selecting the second cationically modified polymer having a charge density of 0.8 to 1.2 meq / g and a molecular weight of at least 1,000,000 g / mol; iii) combining the first and second cationically modified polymers with discrete droplets of a water-insoluble conditioning agent.
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    法律状态:
    2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-02| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-06-02| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: A61Q 5/00 , A61Q 5/02 , A61Q 5/12 , A61K 8/73 , A61K 8/06 Ipc: A61K 8/06 (2006.01), A61K 8/73 (2006.01), A61Q 5/0 |
    2020-08-04| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 01/10/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-02-23| B25A| Requested transfer of rights approved|Owner name: UNILEVER IP HOLDINGS B.V. (PB) |
    优先权:
    申请号 | 申请日 | 专利标题
    CNPCT/CN2013/085505|2013-10-18|
    CN2013085505|2013-10-18|
    EP13198344.7|2013-12-19|
    EP13198344|2013-12-19|
    PCT/EP2014/071016|WO2015055432A1|2013-10-18|2014-10-01|Hair care composition|
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