Transparent scalp composition with discrete particles

Abstract

The present invention is directed to a transparent scalp composition comprising about 0.5% to about 30% by weight of discrete particles, the discrete particles comprising anhydrous particles and an aqueous phase of the transparent scalp composition, the anhydrous particles comprising one or more fatty amphiphiles selected from the group consisting of fatty alcohols, fatty esters, fatty acids, fatty amides, and mixtures thereof, and one or more surfactants selected from the group consisting of cationic, anionic, nonionic, zwitterionic, or mixtures thereof, the anhydrous particles comprising one or more scalp active agents, the discrete particles having a size of about 200 micrometers to about 25,000 micrometers, and an aqueous phase comprising a water-soluble polymer and an aqueous carrier, the transparent scalp composition having a pH of about 3.5 to about 7.0.

Description

[Technical Field]

[0001] The present invention relates to discrete particles that provide scalp benefits from a clear scalp composition. [Background technology]

[0002] Although some consumers suffer from dandruff, they remain reluctant to use anti-dandruff shampoos because they dislike one or more performance aspects of typical anti-dandruff shampoos (i.e., hair feel, scent, etc.). Many consumers do not want to discontinue their favorite cosmetic shampoos for hair benefits. Today's cosmetic shampoos provide hair benefits such as hair shine, feel, and appearance, but cannot eliminate flakes or dandruff. The present invention is based on the development of discrete particles containing scalp actives (anti-dandruff agents) in a formulation that can be mixed with any consumer shampoo product to provide scalp benefits (anti-dandruff, anti-itch). Summary of the Invention [Means for solving the problem]

[0003] The present invention is directed to a transparent scalp composition comprising about 0.5% to about 30% by weight of discrete particles, the discrete particles comprising anhydrous particles and an aqueous phase of the transparent scalp composition, the anhydrous particles comprising one or more fatty amphiphiles selected from the group consisting of fatty alcohols, fatty esters, fatty acids, fatty amides, and mixtures thereof, and one or more surfactants selected from the group consisting of cationic, anionic, nonionic, zwitterionic, or mixtures thereof, the anhydrous particles comprising one or more scalp active agents, the discrete particles having a size of about 200 micrometers to about 25,000 micrometers, and an aqueous phase comprising a water-soluble polymer and an aqueous carrier, the transparent scalp composition having a pH of about 3.5 to about 7.0. DETAILED DESCRIPTION OF THE INVENTION

[0004] While the specification concludes with claims particularly pointing out and distinctly claiming the invention, it is believed the present invention will be better understood from the following description.

[0005] As used herein, "comprising" means that other steps and other ingredients that do not affect the final result may also be added. This term encompasses the terms "consisting of" and "consisting essentially of." As used herein, "consisting essentially of" means that a composition or component may include additional ingredients, but only if the additional ingredients do not materially alter the basic and novel characteristics of the claimed composition or method.

[0006] All percentages, parts, and ratios are based on the total weight of the compositions of the present invention unless otherwise specified. All such weights, with respect to listed ingredients, are based on the active level and therefore do not include solvents or by-products that may be included in commercially available materials, unless otherwise specified. The term "weight percentage" may also be expressed herein as "wt %." Unless otherwise specified, all measurements are understood to be made at ambient conditions, where "ambient conditions" means conditions at about 25°C, less than about 1 atmosphere, and about 50% relative humidity (RH). All numerical ranges are inclusive of narrower ranges, and the stated upper and lower range limits are combinable to create additional ranges not expressly stated.

[0007] "Applying" or "application" as used in reference to a composition means applying or spreading a composition of the present invention onto keratinous tissue, such as hair.

[0008] "Dermatologically acceptable" means that the composition or components described are suitable for use in contact with human skin tissue without undue toxicity, incompatibility, instability, allergic response, etc.

[0009] By "safe and effective amount" is meant an amount of a compound or composition sufficient to significantly induce a beneficial effect.

[0010] "Rinse-off" in reference to a composition means a composition that is intended to be applied to the keratinous substrate and subsequently washed, rinsed, or wiped off within minutes of application. These "rinse-off" compositions should be distinguished from "leave-on" compositions that are applied and intended to be left on the keratinous tissue for a longer period of time.

[0011] By "soluble" is meant that at least about 0.1 g of solute will dissolve in 100 mL of solvent at 25° C. and 1 atm pressure.

[0012] As used herein, "hair" means mammalian hair, particularly hair on the human head and scalp, including scalp hair, facial hair, and body hair.

[0013] "Cosmetically acceptable," as used herein, means that the composition, formulation, or components described are suitable for use in contact with human keratinous tissue without undue toxicity, incompatibility, instability, allergic reaction, etc. All compositions described herein intended for direct application to keratinous tissue are limited to being cosmetically acceptable.

[0014] As used herein, "derivatives" include, but are not limited to, amide, ether, ester, amino, carboxyl, acetyl, acid, salt, and / or alcohol derivatives of a given compound.

[0015] As used herein, the term "polymer" includes material compositions for providing conditioning, whether or not made by the polymerization of one type of monomer. As used herein, "polymer" refers to a chemical substance formed from the polymerization of two or more monomers. As used herein, polymer includes material compositions for providing conditioning, whether or not made by the polymerization of one type of monomer. As used herein, the term "polymer" includes all substances made by the polymerization of monomers and natural polymers. A polymer made from only one type of monomer is called a homopolymer. A polymer made from two or more types of different monomers is called a copolymer. The distribution of different monomers can be calculated statistically or block-by-block, and both possibilities are suitable for the present invention. Except where otherwise noted, the term "polymer" as used herein includes all types of polymers, including homopolymers and copolymers.

[0016] As used herein, the term "gel network" refers to a lamellar or vesicular solid crystalline phase comprising at least one fatty amphiphile and at least one surfactant and water or other suitable solvent, wherein the fatty alcohol and surfactant within this phase are arranged in multilamellar vesicles and / or lamellar sheets. As used herein, the term "solid crystal" refers to a lamellar or vesicular phase structure formed at a temperature below the melting transition temperature (i.e., chain melting temperature) of the layers in the gel network, the melting transition temperature being at least about 27°C. The melting transition temperature can be measured by differential scanning calorimetry.

[0017] The compositions and methods / processes of the present invention can comprise, consist of, and consist essentially of the essential elements and limitations of the present invention described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein.

[0018] As used herein, the term "water-soluble" means that the substance is soluble in water in the composition. Generally, the substance should be soluble in the water solvent at 25°C at a concentration of 0.1% by weight, and may be 1%, 5%, or 15% by weight.

[0019] The term "discrete particles" refers to anhydrous particles that are swollen in the presence of an aqueous phase (e.g., when anhydrous particles are added to a cationic polymer and an aqueous phase to form a scalp composition that can be mixed with a shampoo).

[0020] As used herein, the term "anhydrous particles" refers to particles prepared by eutectic mixing of one or more surfactants and one or more fatty amphiphiles, followed by cooling and solidification. The concentration of water in the anhydrous particles generally ranges from about 0% to about 30% by weight of the anhydrous particles, and may be from about 0% to about 20% by weight, or from about 0% to about 15% by weight. The size of the anhydrous particles in the scalp composition ranges from about 200 μm to about 25,000 μm. The scale size of the discrete particles in the scalp composition ranges from about 200 μm to about 25,000 μm, and may be from about 500 μm to about 7000 μm. The scale size of the discrete particles in the scalp composition may also range from about 1000 μm to about 5000 μm. Measurements are made visually using a ruler, optical microscope, or other conventional techniques.

[0021] As used herein, the term "solid" means that the anhydrous particles at ambient temperature do not conform to the shape of the container in which they are held.

[0022] As used herein, the term "swollen" refers to the state of discrete particles in a scalp composition that have absorbed a sufficient amount of aqueous solvent so that they can be sheared between the fingers while pouring into the hand or onto the head, or while mixing with other hair compositions.

[0023] As used herein, the term "non-hydrated solid phase" refers to the portion of discrete particles in the scalp composition that have absorbed a minimal amount of water and cannot be completely sheared between fingers or in the hand or on the head or while mixing with other hair compositions.

[0024] As used herein, a "transparent" composition means that a substantial amount of visible light can pass through an object, such as a transparent scalp composition. Suitable light transmittance can be determined as being able to clearly see through the composition and exhibiting a haze of <50%.

[0025] Scalp composition The scalp composition includes a cationic polymer, an aqueous carrier, and discrete particles. The discrete particles are anhydrous particles swollen in the presence of an aqueous phase (e.g., when the anhydrous particles are added to a cleansing surfactant and an aqueous phase to form a scalp-promoting product). The anhydrous particles include a fatty amphiphile, at least one surfactant, an active agent that delivers scalp benefits (e.g., anti-dandruff, soothing, oil control, anti-itch, etc.), and a low-concentration aqueous phase. The low-concentration aqueous phase used during the formation of the anhydrous particles is from about 0% by weight of the anhydrous particles to about 30% by weight of the anhydrous particles. The scalp composition may be substantially clear and transparent.

[0026] discrete particles The scalp composition comprises discrete particles, including anhydrous particles and an aqueous phase. The anhydrous particles are prepared by eutectic mixing of one or more fatty amphiphiles and one or more surfactants, followed by cooling and solidification. Various techniques can be used to control the particle size of such anhydrous particles. The anhydrous particles are then added to an aqueous phase containing a cationic polymer, which causes the particles to swell and transform into discrete particles. This swelling can range from about 1 to 100 times the size of the original discrete particles. In the present invention, the discrete particles can swell to about 1.5 to about 4 times their original size when combined with the transparent scalp composition. In the present invention, the discrete particles can swell to about 4 times their original size when combined with the transparent scalp composition.

[0027] The discrete particles can be a gel network, and the swelling of the discrete particles can be completed sequentially by first soaking the discrete particles separately in an aqueous solution for 0.5-3 hours and then adding them to the scalp composition, or by adding the discrete particles simultaneously to the scalp composition and allowing them to fully swell for 3-4 days.

[0028] The size of the discrete particles in the cleaning composition ranges from about 200 μm to about 15,000 μm. The scale size of the discrete particles in the cleaning composition may range from about 500 μm to about 7000 μm. The scale size of the discrete particles in the cleaning composition may range from about 1000 μm to about 5000 μm. Particle size can be measured by conventional techniques, including measuring with a vernier caliper, visually with a ruler, and by simple optical microscopy.

[0029] Gel network beads are made by cooling the bead composition in a silicone mold (silikomart Mini Pearl, item code 36.203.87.0065), resulting in gel network particles ~6.4 mm in diameter. The cooled gel network beads are added to either water or a booster composition and allowed to swell for a period of several hours to several days. The composition may contain anionic, nonionic, amphoteric, or zwitterionic surfactants, cationic polymers, or other agents.

[0030] In the present invention, the gel network beads are added to a syringe for easy dispensing into the cosmetic shampoo before hand mixing. Depending on the composition and time, the beads can swell to the following sizes:

[0031] [Table 1]

[0032] 1. Aliphatic amphiphiles The anhydrous particles comprise at least one fatty amphiphile. As used herein, "fatty amphiphile" refers to a compound having a hydrophobic tail group and a hydrophilic head group that does not render the compound water soluble, and which also has a net neutral charge at the pH of the cleaning composition.

[0033] Aliphatic amphiphiles can be characterized as compounds having a hydrophilic-lipophilic balance ("HLB") of less than or equal to 6. HLB, as used herein, is the standard HLB according to Griffin, J. Soc. Cosm. Chem., vol. 5, 249 (1954).

[0034] A suitable fatty amphiphile, or a suitable mixture of two or more fatty amphiphiles, has a melting point of at least about 27° C. As used herein, melting point is defined as the melting point of the US Pharmacopeia, USP-NF General Chapter <741> The melting point of a mixture of two or more materials can be measured by the standard melting point method described in "Melting range or temperature." The melting point of a mixture of two or more materials is measured by mixing the two or more materials at a temperature above their individual melting points and then cooling the mixture. A mixture has a suitable melting point if the resulting composite is a homogeneous solid below about 27°C. A mixture of two or more fatty amphiphiles, including at least one fatty amphiphile with an individual melting point below about 27°C, is also suitable for use as long as the composite melting point of the mixture is at least about 27°C.

[0035] Suitable aliphatic amphiphiles have a hydrophobic tail group that may be an alkyl, alkenyl (containing up to three double bonds), alkylaromatic, or branched alkyl group having a length of about 12 to about 70 carbon atoms, about 16 to about 60 carbon atoms, about 16 to about 50 carbon atoms, about 16 to about 40 carbon atoms, about 16 to about 22 carbon atoms, and about 18 to 22 carbon atoms. Non-limiting examples of alkyl, alkenyl, or branched alkyl groups suitable for the fatty amphiphile include lauryl, tridecyl, myristyl, pentadecyl, cetyl, heptadecyl, stearyl, arachidyl, behenyl, undecylenyl, palmitoleyl, oleyl, palmitoleyl, linoleyl, linolenyl, arachidonyl, elaidyl, eleostearyl, erucyl, isolauryl, isotridecyl, isomyristal, isopentadecyl, petroselinyl, isocetyl, isoheptadecyl, isostearyl, isoarachidyl, isobehnyl, gadoleyl, brassidyl, and technical grade mixtures thereof.

[0036] Suitable fatty amphiphiles also have hydrophilic head groups that do not render the compound water-soluble, such as compounds with an HLB of 6 or less. Non-limiting examples of compounds with such hydrophilic head groups include fatty alcohols, alkoxylated fatty alcohols, fatty phenols, alkoxylated fatty phenols, fatty amides, alkoxylated fatty amides, fatty amines, fatty alkylamidoalkylamines, fatty alkoxylated amines, fatty carbamates, fatty amine oxides, fatty acids, alkoxylated fatty acids, fatty diesters, fatty sorbitan esters, fatty sugar esters, methyl glucoside esters, fatty glycol esters, mono-, di-, and triglycerides, polyglycerin fatty esters, alkyl glyceryl ethers, propylene glycol fatty acid esters, cholesterol, ceramides, fatty silicone waxes, fatty glucose amides, fatty phosphate esters, and phospholipids. For additional information regarding suitable fatty amphiphiles for use, see U.S. Patent Application Publication No. 2006 / 0024256(A1).

[0037] To form the anhydrous particles, an individual fatty amphiphile or a combination of two or more different fatty amphiphiles may be selected.

[0038] The discrete particles are added to an aqueous solution of a cationic polymer to obtain a scalp composition. Thus, the scalp composition can include the fatty amphiphile in an amount of about 0.05% to about 20% by weight of the scalp composition, or about 0.5% to about 10% by weight, or about 1% to about 8% by weight.

[0039] The discrete particles, when hydrated, can form a gel network in the scalp composition, wherein the weight ratio of fatty amphiphile to surfactant in the gel network component is greater than about 1:9, optionally greater than about 1:5 to about 100:1, optionally greater than about 1:2 to about 50:1, or optionally greater than about 1:1 to about 10:1.

[0040] In the present invention, with respect to the manufacture of products such as scalp compositions, the swellable particles of the present invention allow for packaging of products such as scalp compositions on conventional packaging equipment as opposed to swelling larger particles, and then allowing such products to be placed in a package due to the increased size and fragility of the swollen beads.

[0041] 2. Surfactants used for the preparation of anhydrous particles The anhydrous particles may also include one or more surfactants that are combined with the fatty amphiphile to form the anhydrous particles, are eutectic and mixed, and then cooled to produce the anhydrous particles.

[0042] The scalp composition comprises, as part of the anhydrous particles, a surfactant in an amount of about 0.01% to about 50% by weight of the scalp composition, which may be about 0.1% to about 10% by weight, or about 0.3% to about 5% by weight.

[0043] Suitable surfactants include cationic, anionic, zwitterionic, amphoteric and nonionic surfactants.Surfactants are selected from cationic, anionic and nonionic surfactants and mixtures thereof.For further information on suitable surfactants for use, please refer to US Patent Application Publication No. 2006 / 0024256(A1).

[0044] Additionally, certain surfactants having hydrophobic tail groups with chain lengths of about 16 to about 22 carbon atoms can be selected to contribute to obtaining a melt transition temperature for the resulting anhydrous particles of at least about 38° C. In such surfactants, the hydrophobic end group can be alkyl, alkenyl (containing up to three double bonds), alkyl aromatic, or branched alkyl.

[0045] Mixtures of two or more surfactants of the above-specified types may be used as surfactants.

[0046] The discrete particles may also include a surfactant. As used herein, "surfactant" refers to one or more surfactants combined with the fatty amphiphile and water for the discrete particles.

[0047] 3. Water or a suitable solvent The anhydrous particles may further comprise about 0% to about 30% by weight of water or a suitable solvent, about 1% to about 20% by weight, about 0% to about 5% by weight, or about 1% to about 10% by weight of the anhydrous particles. As used herein, the term "suitable solvent" refers to any solvent that can be used in place of or in combination with water.

[0048] Scalp composition base The discrete particles may be added to a scalp composition base, which may include additional ingredients such as a cationic polymer, a monocarboxylic acid, an aqueous carrier, and a scalp active.

[0049] When added to a scalp composition base (including an aqueous phase), the anhydrous particles become discrete particles. The discrete particles are then swollen by the aqueous phase. The aqueous phase comprises water and / or a suitable solvent. As used herein, the term "suitable solvent" refers to any solvent that can be used instead of or in combination with water.

[0050] In the present invention, the discrete particles may also be in the form of a single unit that can be used as a stand-alone product or can be combined with a personal care product such as shampoo in a person's hands before application to the hair and scalp.

[0051] cationic polymer The scalp composition may contain a cationic polymer. The concentration of the cationic polymer in the scalp composition may be about 0.01% to about 5% by weight, about 0.075% to about 2.5% by weight, about 0.1% to about 1.0% by weight, or about 0.3% to about 1.0% by weight of the cleansing composition.

[0052] Suitable cationic polymers may have a cationic charge density of at least about 0.4 meq / g, at least about 0.7 meq / g, at least about 1.2 meq / g, at least about 1.5 meq / g, or less than about 7 meq / g, or less than about 5 meq / g, at the pH of the intended use of the composition. The pH will generally range from about pH 3 to about pH 9, and may range from about pH 4 to about pH 8. The "cationic charge density" of a polymer, as used herein, refers to the ratio of the number of positive charges on the polymer to the molecular weight of the polymer. Such suitable cationic polymers generally have an average molecular weight of about 10,000 to 10,000,000, and may range from about 50,000 to about 5,000,000, or may range from about 100,000 to about 3,000,000.

[0053] Suitable cationic polymers for use in the present composition include polysaccharide polymers, such as cationic cellulose derivatives and cationic starch derivatives, such as salts of hydroxyethylcellulose reacted with trimethylammonium-substituted epoxides.Other suitable cationic polymers include cationic guar gum derivatives, such as guar hydroxypropyltrimonium chloride.Further suitable cationic polymers include galactomannan polymer derivatives having a mannose to galactose ratio of greater than 2:1 on a monomer-to-monomer basis, such as cassia gum hydroxypropyltrimonium chloride.A particularly suitable cationic adhesion polymer includes guar hydroxypropyltrimonium chloride.

[0054] The cationic guar polymer may be formed from a quaternary ammonium compound. The quaternary ammonium compound for forming the cationic guar polymer conforms to the general formula 1:

[0055] [ka] In the formula, R3, R4, and R5 are methyl or ethyl groups, and R6 is an epoxyalkyl group of general formula 2 or

[0056] [ka] or R6 is a halohydrin group of general formula 3,

[0057] [ka] In the formula, R7 is C1-C3 alkylene, X is chlorine or bromine, and Z is an anion such as Cl-, Br-, I-, or HSO4-.

[0058] The cationic guar polymer may conform to the following general formula 4:

[0059] [ka] wherein R8 is guar gum, R4, R5, R6, and R7 are as defined above, and Z is a halogen. The cationic guar polymer can conform to the following formula 5:

[0060] [ka]

[0061] Suitable cationic guar polymers include cationic guar gum derivatives such as guar hydroxypropyltrimonium chloride. The cationic guar polymer is guar hydroxypropyltrimonium chloride. Specific examples of guar hydroxypropyltrimonium chloride include the Jaguar® series available from Rhone-Poulenc Incorporated, such as Jaguar® C-17, which has a cationic charge density of about 0.6 meq / g and about 2,200,000 g / mol and is available from Rhodia. Jaguar® C 13S has a molecular weight of 2,200,000 g / mol and a cationic charge density of about 0.8 meq / g (available from Rhodia Company). N-Hance 3196, which has a charge density of about 0.7 and a molecular weight of about 1,100,000 g / mol and is available from ASI. BF-13, a borate-free guar having a charge density of about 1.1 meq / g and a molecular weight of about 800,000, and BF-17, a borate-free guar having a charge density of about 1.7 meq / g and a molecular weight of about 800,000, are both available from ASI.

[0062] The combination of cationic polymers can improve the conditioning of the scalp composition and act as a suspending agent for the discrete particles. The combination of a cationic polymer having a charge density of about 0.4 meq / g to about 0.8 meq / g (or about 0.7 meq / g) and a cationic polymer having a molecular weight of more than about 1,000,000 can provide a scalp composition with a clean, wet hair feel.

[0063] The scalp composition can include a homopolymer of polyquaternium-37, ie, N,N,N-trimethyl-2-((2-methyl-1-oxo-2-propenyl)oxy)-chloride homopolymer.

[0064] The polyquaternium-37 useful herein has a cationic charge density from about 2.3 meq / g, optionally from about 4.5 meq / g, optionally from about 5.8 meq / g, optionally up to about 13 meq / g, optionally up to about 10 meq / g, optionally up to about 7.0 meq / g.

[0065] The polyquaternium-37 useful herein has a molecular weight of about 207.7 g / mol or greater, and may be about 250 g / mol or greater, or even about 200 g / mol or greater, in terms of providing improved hair conditioning and anti-static properties.

[0066] Commercially available examples of polyquaternium-37 polymers include, by way of non-limiting example, those having the trade name COSMEDIA® Ultragel 300 available from BASF.

[0067] The scalp composition may include diallyldimethylammonium chloride (DADMAC).

[0068] Water-based carrier The scalp composition may include an aqueous carrier. Typically, the composition is in the form of a pourable liquid (under ambient conditions). As such, the composition includes an aqueous carrier at a concentration of at least about 20% to about 95% by weight of the composition, and may be about 60% to about 85% by weight. The aqueous carrier may include water or a miscible mixture of water and an organic solvent. The aqueous carrier may also include water with minimal or no significant concentrations of organic solvent, except when incidentally incorporated into the composition as a minor component of other components.

[0069] Detergent surfactants The scalp composition of the present invention may comprise more than about 10% by weight of a surfactant system that provides cleansing performance to the composition, and may comprise more than 12% by weight of a surfactant system that provides cleansing performance to the composition. The surfactant system comprises an anionic surfactant and / or a combination of anionic surfactants and / or a combination of anionic surfactants with a co-surfactant selected from the group consisting of amphoteric, zwitterionic, nonionic, and mixtures thereof. Various examples and descriptions of cleansing surfactants are described in U.S. Patent No. 8,440,605, U.S. Patent Application Publication Nos. 2009 / 155383, and 2009 / 0221463, which are incorporated herein by reference in their entireties.

[0070] The personal care compositions may comprise from about 10% to about 25%, from about 10% to about 18%, from about 10% to about 14%, from about 10% to about 12%, from about 11% to about 20%, from about 12% to about 20%, and / or from about 12% to about 18% by weight of one or more surfactants.

[0071] Suitable anionic surfactants for use in the present composition are alkyl and alkyl ether sulfates.Other suitable anionic surfactants are the water-soluble salts of organic sulfuric acid reaction products.Still other suitable anionic surfactants are the reaction products of fatty acids esterified with isethionic acid and neutralized with sodium hydroxide.Other similar anionic surfactants are described in U.S. Patent Nos. 2,486,921, 2,486,922, and 2,396,278, which are incorporated herein by reference in their entirety.

[0072] Exemplary anionic surfactants for use in personal care compositions include ammonium lauryl sulfate, ammonium laureth sulfate, ammonium C10-15 pareth sulfate, ammonium C10-15 alkyl sulfate, ammonium C11-15 alkyl sulfate, ammonium decyl sulfate, ammonium deceth sulfate, ammonium undecyl sulfate, ammonium undeceth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauryl monoglyceride sodium sulfate, sodium lauryl sulfate, sodium laureth sulfate, sodium C10-15 pareth sulfate, sodium C10-15 alkyl sulfate, sodium C11-15 alkyl sulfate, sodium decyl sulfate, sodium deceth sulfate Examples of anionic surfactants include sodium undecyl sulfate, sodium undeceth sulfate, potassium lauryl sulfate, potassium laureth sulfate, C10-15 potassium pareth sulfate, C10-15 potassium alkyl sulfate, C11-15 potassium alkyl sulfate, potassium decyl sulfate, potassium deceth sulfate, potassium undecyl sulfate, potassium undeceth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, lauryl sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauryl sulfate, triethanolamine lauryl sulfate, triethanolamine lauryl sulfate, monoethanolamine cocoyl sulfate, monoethanolamine lauryl sulfate, sodium tridecylbenzenesulfonate, sodium dodecylbenzenesulfonate, sodium cocoyl isethionate, and combinations thereof. The anionic surfactant may be sodium lauryl sulfate or sodium laureth sulfate.

[0073] The composition of the present invention also comprises a) RO(CHCHR0) y SO3M, b) CH3(CH2) zCHR2CH2O(CH2CHR3O) y SO3M, and c) Mixtures of these [Wherein R1 is CH3(CH2) 10 wherein R2 represents H or a hydrocarbon group containing 1 to 4 carbon atoms such that the sum of the carbon atoms in z and R2 is 8; R3 is H or CH3; y is 0 to 7, and when y is not zero (0), the average value of y is about 1; and M is a monovalent or divalent positively charged cation.

[0074] Suitable anionic alkyl sulfate and alkyl ether sulfate surfactants include, but are not limited to, those having branched alkyl chains synthesized from C8 to C18 branched alcohols, which may be selected from the group consisting of Guerbet alcohols, aldol condensation derived alcohols, oxo alcohols, FT oxo alcohols, and mixtures thereof. Non-limiting examples of 2-alkyl branched alcohols include 2-methyl-1-undecanol, 2-ethyl-1-decanol, 2-propyl-1-nonanol, 2-butyl-1-octanol, 2-methyl-1-dodecanol, 2-ethyl-1-undecanol, 2-propyl-1-decanol, 2-butyl-1-nonanol, 2-pentyl-1-octanol, 2-pentyl-1-heptanol, and surfactants sold under the trade names LIAL® (Sasol), ISALCHEM (Sasol), and NEODOL® (Shell), as well as oxo alcohols such as those sold under the trade name ISOFOL® (Sasol), 2-propyl-1-butanol, 2-butyl-1-octanol, 2-butyl-1-decanol, 2-pentyl-1-nonanol, 2-hexyl-1-octanol, 2-hexyl-1-decanol, and Guerbet and aldol condensation derived alcohols such as those sold under the trade name ISOFOL® (Sasol), or as alcohol ethoxylates and alkoxylates under the trade names LUTENSOL XP® (BASF) and LUTENSOL XL® (BASF).

[0075] Anionic alkyl sulfates and alkyl ether sulfates also include those synthesized from C8-C18 branched alcohols derived from butylene or propylene, sold under the trade names EXXAL™ (Exxon) and Marlipal® (Sasol). This includes the subclass of anionic surfactants, sodium trideceth-n sulfate (STnS), where n is from about 0.5 to about 3.5. Exemplary surfactants of this subclass are sodium trideceth-2 sulfate and sodium trideceth-3 sulfate. The compositions of the present invention may also include sodium tridecyl sulfate.

[0076] The compositions of the present invention can also include anionic alkyl and alkyl ether sulfosuccinates and / or dialkyl and dialkyl ether sulfosuccinates, and mixtures thereof. The dialkyl and dialkyl ether sulfosuccinates can be C6-15 linear or branched dialkyl or dialkyl ether sulfosuccinates. The alkyl moieties can be symmetric (i.e., the same alkyl moiety) or asymmetric (i.e., different alkyl moieties). Non-limiting examples include disodium lauryl sulfosuccinate, disodium laureth sulfosuccinate, sodium bistridecyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium dihexyl sulfosuccinate, sodium dicyclohexyl sulfosuccinate, sodium diamyl sulfosuccinate, sodium diisobutyl sulfosuccinate, linear bis(tridecyl) sulfosuccinate, and mixtures thereof.

[0077] The scalp composition may contain a co-surfactant. The co-surfactant may be selected from the group consisting of amphoteric surfactants, zwitterionic surfactants, nonionic surfactants, and mixtures thereof. The co-surfactant may include, but is not limited to, lauramidopropyl betaine, cocamidopropyl betaine, lauryl hydroxysultaine, sodium lauroamphoacetate, disodium cocoamphodiacetate, cocamide monoethanolamide, and mixtures thereof.

[0078] The scalp composition may further comprise from about 0.25% to about 15%, from about 1% to about 14%, from about 2% to about 13% by weight of one or more amphoteric, zwitterionic, nonionic co-surfactants or mixtures thereof.

[0079] Suitable amphoteric or zwitterionic surfactants for use in the personal care compositions herein include those known for use in shampoos or other personal care cleansers. Non-limiting examples of suitable zwitterionic or amphoteric surfactants are described in U.S. Patent Nos. 5,104,646 and 5,106,609, which are incorporated herein by reference in their entireties.

[0080] Amphoteric co-surfactants suitable for use in the compositions include surfactants described as derivatives of aliphatic secondary and tertiary amines, where the aliphatic groups can be linear or branched, and one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group such as carboxy, sulfonate, sulfate, phosphate, or phosphonate. Suitable amphoteric surfactants include sodium cocaminopropionate, sodium cocaminodipropionate, sodium cocoamphoacetate, sodium cocoamphodiacetate, sodium cocoamphohydroxypropylsulfonate, sodium cocoamphopropionate, sodium cornamphopropionate, sodium lauraminopropionate, sodium lauroamphoacetate, sodium lauroamphodiacetate, sodium lauroamphohydroxypropylsulfonate, sodium lauroamphopropionate, sodium cornamphopropionate, sodium lauriminodipropionate, ammonium cocaminopropionate, ammonium cocaminodipropionate, ammonium cocoamphoacetate, ammonium cocoamphodiacetate, ammonium cocoamphohydroxypropylsulfonate, ammonium cocoamphopropionate, ammonium cornamphopropionate, ammonium lauraminopropionate, lauroamphoacetic acid Ammonium lauroamphodiacetate, ammonium lauroamphohydroxypropylsulfonate, ammonium lauroamphopropionate, ammonium cornamphopropionate, ammonium lauriminodipropionate, triethanolamine cocaminopropionate, triethanolamine cocaminodipropionate, triethanolamine cocoamphoacetate, triethanolamine cocoamphohydroxypropylsulfonate, triethanolamine cocoamphopropionate, triethanolamine cornamphopropionate, triethanolamine lauraminopropionate, triethanolamine lauroamphoacetate, triethanolamine lauroamphohydroxypropylsulfonate, triethanolamine lauroamphopropionate, triethanolamine cornamphopropionate, triethanolamine lauriminodipropionate, cocoamphodipropionic acid, disodium caproamphodiacetateDisodium caproamphodipropionate, disodium capryloamphodiacetate, disodium capryloamphodipropionate, disodium cocoamphocarboxyethylhydroxypropylsulfonate, disodium cocoamphodiacetate, disodium cocoamphodipropionate, disodium dicarboxyethylcocopropylenediamine, disodium laureth-5 carboxyamphodiacetate, disodium lauriminodipropionate, disodium lauroamphodiacetate, disodium lauroamphodipropionate, disodium oleoamphodipropionate, disodium PPG-2-isodecyl-7 carboxyamphodiacetate, lauraminopropionic acid, lauroamphodipropionic acid, laurylaminopropylglycine, lauryldiethylenediaminoglycine, and mixtures thereof.

[0081] The composition may also include zwitterionic co-surfactants, which are derivatives of aliphatic quaternary ammonium, phosphonium, and sulfonium compounds, in which the aliphatic groups may be linear or branched, and one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group such as carboxy, sulfonate, sulfate, phosphate, or phosphonate. The zwitterionic surfactant may be selected from the group consisting of cocamidoethyl betaine, cocamidopropylamine oxide, cocamidopropyl betaine, cocamidopropyl dimethylaminohydroxypropyl hydrolyzed collagen, cocamidopropyldimonium hydroxypropyl hydrolyzed collagen, cocamidopropyl hydroxysultaine, cocobetaineamidoamphopropionate, coco-betaine, coco-hydroxysultaine, coco / oleamidopropyl betaine, coco-sultaine, lauramidopropyl betaine, lauryl betaine, lauryl hydroxysultaine, lauryl sultaine, and mixtures thereof.

[0082] Nonionic surfactants suitable for use in the present invention include those described in McCutcheon's Detergents and Emulsifiers, North American edition (1986), Allured Publishing Corp., and McCutcheon's Functional Materials, North American edition (1992). Nonionic surfactants suitable for use in the personal care compositions of the present invention include, but are not limited to, polyoxyethylenated alkylphenols, polyoxyethylenated alcohols, polyoxyethylenated polyoxypropylene glycols, glyceryl esters of alkanoic acids, polyglyceryl esters of alkanoic acids, propylene glycol esters of alkanoic acids, sorbitol esters of alkanoic acids, polyoxyethylenated sorbitol esters of alkanoic acids, polyoxyethylene glycol esters of alkanoic acids, polyoxyethylenated alkanoic acids, alkanolamides, N-alkylpyrrolidones, alkyl glycosides, alkyl polyglucosides, alkylamine oxides, and polyoxyethylenated silicones.

[0083] The co-surfactant can be a nonionic surfactant selected from the group of alkanolamides including cocamide, cocamide methyl MEA, cocamide DEA, cocamide MEA, cocamide MIPA, lauramide DEA, lauramide MEA, lauramide MIPA, myristamide DEA, myristamide MEA, PEG-20 cocamide MEA, PEG-2 cocamide, PEG-3 cocamide, PEG-4 cocamide, PEG-5 cocamide, PEG-6 cocamide, PEG-7 cocamide, PEG-3 lauramide, PEG-5 lauramide, PEG-3 oleamide, PPG-2 cocamide, PPG-2 hydroxyethyl cocamide, PPG-2 hydroxyethyl isostearamide, and mixtures thereof.

[0084] Representative polyoxyethylenated alcohols include alkyl chains ranging from C9 to C16 and having from about 1 to about 110 alkoxy groups, including, but not limited to, laureth-3, laureth-23, ceteth-10, steareth-10, steareth-100, beheneth-10, and those commercially available from Shell Chemicals (Houston, Texas) under the trade names Neodol® 91, Neodol® 23, Neodol® 25, Neodol® 45, Neodol® 135, Neodo® 167, Neodol® PC100, Neodol® PC200, Neodol® PC600, and mixtures thereof.

[0085] Also commercially available are polyoxyethylene aliphatic ethers available from Uniqema (Wilmington, Delaware) under the Brij® trade name, including, but not limited to, Brij® 30, Brij® 35, Brij® 52, Brij® 56, Brij® 58, Brij® 72, Brij® 76, Brij® 78, Brij® 93, Brij® 97, Brij® 98, Brij® 721, and mixtures thereof.

[0086] Suitable alkyl glycosides and alkyl polyglucosides can be represented by the formula (S)nOR, where S is a sugar moiety such as glucose, fructose, mannose, galactose, etc.; n is an integer from about 1 to about 1000; and R is a C8-C30 alkyl group. Examples of long-chain alcohols from which the alkyl group can be derived include decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, and the like. Examples of these surfactants include alkyl polyglucosides, where S is a glucose moiety, R is a C8-20 alkyl group, and n is an integer from about 1 to about 9. Commercially available examples of these surfactants include decyl polyglucosides and lauryl polyglucosides, available from Cognis (Ambler, Pa.) under the trade names APG® 325CS, APG® 600CS, and APG® 625CS. Also useful herein are sucrose ester surfactants such as sucrose cocoate and sucrose laurate, as well as alkyl polyglucosides available from Dow Chemical Company (Houston, Tx) under the trade names Triton™ BG-10 and Triton™ CG-110.

[0087] Other nonionic surfactants suitable for use in the present invention are glyceryl esters and polyglyceryl esters, including, but not limited to, glyceryl monoesters, such as glyceryl oleate, glyceryl monostearate, glyceryl monopalmitate, glyceryl monobehenate, and mixtures thereof, of C12-22 saturated, unsaturated, and branched fatty acids, and polyglyceryl esters of C12-22 saturated, unsaturated, and branched fatty acids, such as polyglyceryl-4 isostearate, polyglyceryl-3 oleate, polyglyceryl-2-sesquioleate, triglyceryl diisostearate, diglyceryl monooleate, tetraglyceryl monooleate, and mixtures thereof.

[0088] Also useful herein as nonionic surfactants are sorbitan esters. Sorbitan esters of C12-22 saturated, unsaturated, and branched fatty acids are useful herein. These sorbitan esters typically comprise a mixture of esters, such as monoesters, diesters, and triesters. Representative examples of suitable sorbitan esters include sorbitan monolaurate (SPAN® 20), sorbitan monopalmitate (SPAN® 40), sorbitan monostearate (SPAN® 60), sorbitan tristearate (SPAN® 65), sorbitan monooleate (SPAN® 80), sorbitan trioleate (SPAN® 85), and sorbitan isostearate.

[0089] Also suitable for use herein are alkoxylated derivatives of sorbitan esters, including, but not limited to, polyoxyethylene (20) sorbitan monolaurate (Tween® 20), polyoxyethylene (20) sorbitan monopalmitate (Tween® 40), polyoxyethylene (20) sorbitan monostearate (Tween® 60), polyoxyethylene (20) sorbitan monooleate (Tween® 80), polyoxyethylene (4) sorbitan monolaurate (Tween® 21), polyoxyethylene (4) sorbitan monostearate (Tween® 61), polyoxyethylene (5) sorbitan monooleate (Tween® 81), and mixtures thereof, all available from Uniqema.

[0090] Also suitable for use herein are alkylphenol ethoxylates, including, but not limited to, nonylphenol ethoxylates (Tergitol™ NP-4, NP-6, NP-7, NP-8, NP-9, NP-10, NP-11, NP-12, NP-13, NP-15, NP-30, NP-40, NP-50, NP-55, NP-70, available from Dow Chemical Company, Houston, Tex.) and octylphenol ethoxylates (Triton™ X-15, X-35, X-45, X-114, X-100, X-102, X-165, X-305, X-405, X-705, available from Dow Chemical Company, Houston, Tex.).

[0091] Also suitable for use herein are tertiary alkyl amine oxides, including lauramine oxide and cocamine oxide.

[0092] Non-limiting examples of other anionic surfactants, zwitterionic surfactants, amphoteric surfactants, and additional nonionic surfactants suitable for use in personal care compositions are described in McCutcheon's "Emulsifiers and Detergents, 1989 Annual" (published by MC Publishing Co.), and U.S. Pat. Nos. 3,929,678, 2,658,072, 2,438,091, and 2,528,378, which are incorporated herein by reference in their entireties.

[0093] Suitable surfactant combinations contain an average weight percent alkyl branching of from about 0.5% to about 30%, alternatively from about 1% to about 25%, alternatively from about 2% to about 20%. The surfactant combination can have a cumulative average C8-C12 alkyl chain length weight percent of from about 7.5% to about 25% by weight, alternatively from about 10% to about 22.5% by weight, alternatively from about 10% to about 20% by weight. The surfactant combination can have an average C8-C12 / C13-C18 alkyl chain ratio of from about 3 to about 200, alternatively from about 25 to about 175.5, alternatively from about 50 to about 150, alternatively from about 75 to about 125.

[0094] Additional ingredients The scalp composition may further comprise one or more optional components known for use in hair care or personal care products, provided that the optional components are physically and chemically compatible with the components described herein or do not otherwise unduly impair the stability, aesthetics, or performance of the product. The individual concentration of such optional components may range from about 0.001% to about 10% by weight of the composition.

[0095] Non-limiting examples of optional components that may be used in the compositions include cationic polymers, conditioning agents (hydrocarbon oils, fatty acid esters, silicones), anti-dandruff agents, sensates, suspending agents, viscosity modifiers, dyes, non-volatile solvents or diluents (water soluble and water insoluble), pearlizing aids, foam boosters, additional surfactants or non-ionic co-surfactants, pediculicides, pH adjusters, fragrances, preservatives, chelating agents, proteins, skin active agents, sunscreens, UV absorbers, and vitamins.

[0096] A. Dispersed particles The composition may include dispersed particles. Useful particles may be inorganic, synthetic, or semi-synthetic in origin. When present, the dispersed particles are incorporated in an amount of about 0.025% to about 20% by weight of the composition, optionally about 0.05% to about 10% by weight, optionally about 0.1% to about 5% by weight, optionally about 0.25% to about 3% by weight, or optionally about 0.5% to about 1% by weight.

[0097] B. Cationic surfactants The scalp composition of the present invention may contain a cationic surfactant. In the present invention, the cationic surfactant may be behentrimonium methosulfate (BTMS).

[0098] The cationic surfactant may be one cationic surfactant or a mixture of two or more cationic surfactants.The cationic surfactant system may be selected from mono-long alkyl quaternized ammonium salt; a combination of mono-long alkyl quaternized ammonium salt and di-long alkyl quaternized ammonium salt; mono-long alkyl amidoamine salt; a combination of mono-long alkyl amidoamine salt and di-long alkyl quaternized ammonium salt.The cationic surfactant system may be a mixture of mono-long alkyl quaternized ammonium salt and di-long alkyl quaternized ammonium salt.

[0099] Mono-long-chain alkyl quaternized ammonium salts The monoalkyl quaternized ammonium salt cationic surfactants useful herein have one long alkyl chain of 12 to 30 carbon atoms, and may be 16 to 24 carbon atoms, or may be a C18-22 alkyl group. The remaining groups attached to the nitrogen are independently selected from alkyl groups of 1 to about 4 carbon atoms, or alkoxy groups, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 4 carbon atoms.

[0100] The mono-long chain alkyl quaternized ammonium salts useful herein have the following formula (I):

[0101] [ka] (In the formula, R 75 , R 76 , R 77 , and R 78 is selected from an alkyl group of 12 to 30 carbon atoms, or an aromatic group, an alkoxy group, a polyoxyalkylene group, an alkylamido group, a hydroxyalkyl group, an aryl group, or an alkylaryl group having up to about 30 carbon atoms; 75 , R 76 , R 77 , and R 78the remainder are independently selected from alkyl groups of 1 to about 4 carbon atoms, or alkoxy groups having up to about 4 carbon atoms, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups; and X - R has a salt-forming anion, such as one selected from halogen (e.g., chloride, bromide), acetate, citrate, lactate, glycolate, phosphate, nitrate, sulfonate, sulfate, alkyl sulfate, and alkyl sulfonate groups. In addition to carbon and hydrogen atoms, the alkyl group may contain ether and / or ester linkages, as well as other groups such as amino groups. Longer chain alkyl groups, e.g., those having about 12 carbon atoms or more, may be saturated or unsaturated. R 75 , R 76 , R 77 , and R 78 may be selected from alkyl groups of 12 to 30 carbon atoms, may be 16 to 24 carbon atoms, may be 18 to 22 carbon atoms, may be from 22 carbon atoms, and R 75 , R 76 , R 77 , and R 78 the remainder are independently selected from CH3, C2H5, C2H4OH, and mixtures thereof, and X is selected from the group consisting of the recited acids, and mixtures thereof.

[0102] Non-limiting examples of such mono-long chain alkyl quaternized ammonium salt cationic surfactants include behenyltrimethylammonium salts, stearyltrimethylammonium salts, cetyltrimethylammonium salts, and hydrogenated tallowalkyltrimethylammonium salts.

[0103] Mono-long chain alkylamidoamine salt Mono-long chain alkylamines are also suitable as cationic surfactants. Primary, secondary, and tertiary aliphatic amines are useful. Tertiary amidoamines having alkyl groups of about 12 to about 22 carbon atoms are particularly useful. Exemplary tertiary amidoamines include stearamidopropyl dimethylamine, stearamidopropyl diethylamine, stearamidoethyl diethylamine, stearamidoethyl dimethylamine, palmitamidopropyl dimethylamine, palmitamidopropyl diethylamine, palmitamidoethyl diethylamine, palmitamidoethyl dimethylamine, behenamidopropyl dimethylamine, behenamidopropyl diethylamine, behenamidoethyl diethylamine, behenamidoethyl dimethylamine, arachidamidopropyl dimethylamine, arachidamidopropyl diethylamine, arachidamidoethyl diethylamine, arachidamidoethyl dimethylamine, and diethylaminoethyl stearamide. Amines useful in the present invention are disclosed in U.S. Pat. No. 4,275,055 (Nachtigal et al.). These amines can also be used in combination with monocarboxylic acids such as l-glutamic acid, salicylic acid, lactic acid, hydrochloric acid, malic acid, succinic acid, acetic acid, fumaric acid, tartaric acid, glycolic acid, aspartic acid, citric acid, l-glutamic acid hydrochloride, maleic acid, lactobionic acid, or glucolactone, and mixtures thereof, which may be salicylic acid, l-glutamic acid, lactic acid, aspartic acid, glycolic acid, lactobionic acid, or glucolactone. The amines herein may be partially neutralized with any of the acids in a molar ratio of amine to acid of about 1:1 to about 1:4, which may be about 1:1.1 to about 1:3.2.

[0104] Di-long alkyl quaternized ammonium salts The di-long-chain alkyl quaternized ammonium salt can be combined with a mono-long-chain alkyl quaternized ammonium salt or a mono-long-chain alkyl amidoamine salt. It is believed that such a combination can provide a more easily rinsed feel than the use of a mono-long-chain alkyl quaternized ammonium salt or a mono-long-chain alkyl amidoamine salt alone. In such a combination with a mono-long-chain alkyl quaternized ammonium salt or a mono-long-chain alkyl amidoamine salt, the di-long-chain alkyl quaternized ammonium salt is used at a level such that the weight percent of the di-alkyl quaternized ammonium salt in the cationic surfactant system can range from about 10% to about 50%, or from about 30% to about 45%.

[0105] The dialkyl quaternized ammonium salt cationic surfactants useful herein have two long alkyl chains of 12 to 30 carbon atoms, and can be 16 to 24 carbon atoms, or 18 to 22 carbon atoms. The remaining groups attached to the nitrogen are independently selected from alkyl groups of 1 to about 4 carbon atoms, or alkoxy groups, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 4 carbon atoms.

[0106] The di-long chain alkyl quaternized ammonium salts useful herein have the following formula (II):

[0107] [ka] (In the formula, R 75 , R 76 , R 77 and R 78 two of R are selected from alkyl groups of 12 to 30 carbon atoms, or aromatic groups, alkoxy groups, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 30 carbon atoms; 75 , R 76 , R 77 , and R 78the remainder are independently selected from alkyl groups of 1 to about 4 carbon atoms, or alkoxy groups having up to about 4 carbon atoms, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups; and X - R has a salt-forming anion, such as one selected from halogen (e.g., chloride, bromide), acetate, citrate, lactate, glycolate, phosphate, nitrate, sulfonate, sulfate, alkyl sulfate, and alkyl sulfonate groups. In addition to carbon and hydrogen atoms, the alkyl group may contain ether and / or ester linkages, as well as other groups such as amino groups. Longer chain alkyl groups, e.g., those having about 12 carbon atoms or more, may be saturated or unsaturated. R 75 , R 76 , R 77 , and R 78 may be selected from alkyl groups of 12 to 30 carbon atoms, may be 16 to 24 carbon atoms, may be 18 to 22 carbon atoms, may be from 22 carbon atoms, and R 75 , R 76 , R 77 , and R 78 the remainder are independently selected from CH3, C2H5, C2H4OH, and mixtures thereof, and X is selected from the group consisting of Cl, Br, CH3OSO3, C2H5OSO3, and mixtures thereof.

[0108] Examples of such dialkyl quaternized ammonium salt cationic surfactants include dialkyl(14-18)dimethylammonium chloride, ditallowalkyldimethylammonium chloride, dihydrogenated tallowalkyldimethylammonium chloride, distearyldimethylammonium chloride, and dicetyldimethylammonium chloride. Examples of such dialkyl quaternized ammonium salt cationic surfactants also include asymmetric dialkyl quaternized ammonium salt cationic surfactants.

[0109] C. Scalp active substance Piroctone and salts of piroctone, such as piroctone olamine, are known to provide anti-dandruff benefits and are scalp actives. However, piroctone olamine is often supplied as a crystalline powder and is also known to have very limited solubility in water, meaning that it is a challenge to ensure the anti-dandruff active is solubilized in the simplest possible combination of materials.

[0110] It has been discovered in accordance with the present invention that certain solid organic compounds, such as piroctone and / or its salts, tend to crystallize under the following conditions: When the aqueous composition comprises a cationic surfactant and a high-melting-point fatty compound, - when the amount of solid organic compounds in the composition is increased, in particular when it is greater than 0.2%, and / or when the composition has a pH of about 3.5 to about 7.

[0111] Piroctone olamine in conditioners is usually solubilized at a high concentration (about 5%) by certain oils. The oils are typically emulsified by cationic surfactants and high-melting-point fatty compounds, resulting in highly viscous, opaque products. In contrast, the present invention does not use such oils (which make hair and scalp oily). Instead, it uses a specific surfactant base, such as BTMS, and a specific acid as a counterion, in a specific ratio of surfactant base / acid / piroctone olamine, to achieve a desired pH range in which piroctone olamine functions and adheres better to the scalp. This provides anti-dandruff effects and good conditioning without using excessive cationic surfactants and high-melting-point fatty compounds.

[0112] In the present invention, the scalp active agent may be a substituted 2-pyridinol-N-oxide agent, such as piroctone olamine or ciclopirox olamine. Piroctone olamine and ciclopirox olamine are salts of piroctone and ciclopirox with monoethanolamine, respectively. In compositions having an acidic pH, they are protonated to form piroctone and ciclopirox, respectively. In the present invention, the composition may have an acidic pH, and may have a pH of about 2 to about 7, about 3.5 to about 7, about 3.5 to about 6, or even about 3.5 to about 5.

[0113] The present invention may include one or more scalp active agents, which may be one or a mixture selected from the group consisting of azoles such as climbazole, ketoconazole, itraconazole, econazole, and elubiol; hydroxypyridones such as piroctone olamine, ciclopirox, rilopirox, and MEA-hydroxyoctyloxypyridinone; strobilurins such as azoxystrobin, and metal chelators such as 1,10-phenanthroline, salicylic acid, and menthol.

[0114] The azole-soluble scalp active may be an imidazole selected from the group consisting of benzimidazole, benzothiazole, bifonazole, butaconazole nitrate, climbazole, clotrimazole, cloconazole, eberconazole, econazole, elubiol, fenticonazole, fluconazole, flutimazole, isoconazole, ketoconazole, lanoconazole, metronidazole, miconazole, neticonazole, omoconazole, oxiconazole nitrate, sertaconazole, sulconazole nitrate, tioconazole, thiazole, and mixtures thereof, or the azole antibacterial agent is a triazole selected from the group consisting of terconazole, itraconazole, and mixtures thereof. The azole-soluble scalp health active may be ketoconazole. The only soluble scalp health active may be ketoconazole.

[0115] These scalp active compounds are not soluble in typical solvents such as water or aqueous mixtures, even in high concentrations of glycerin or propylene glycol in water. They typically require either high concentrations (greater than 5% or even 10%) of emollient oils, such as triethylhexanoin or octyldodecyl myristate, or high concentrations (greater than 50%) of alcohols, such as ethanol. The former (oils) are known to cause a negative oily feel on the scalp and hair, while the latter (alcohols) are known to discourage most consumers from applying them to scalps already sensitive to dandruff. The present invention solubilizes such scalp actives through a combination of a surfactant (primarily required for hair conditioning) and a specific acid (primarily required for pH adjustment). Nothing other than these two substances is needed to formulate these anti-dandruff and scalp actives into a soluble form in liquid.

[0116] In the present invention, the scalp active may be a particulate in a fatty acid matrix. Pyridinethione particles are a preferred particulate scalp active ingredient for use in the compositions of the present invention. In the present invention, the anti-dandruff active may be a 1-hydroxy-2-pyridinethione salt, in particulate form. In the present invention, the concentration of pyridinethione microparticles may range from about 0.01% to about 5%, or from about 0.1% to about 3%, or from about 0.1% to about 2% by weight of the composition. In the present invention, the pyridinethione salt is formed from a heavy metal such as zinc, tin, cadmium, magnesium, aluminum, and zirconium, typically zinc, and is typically the zinc salt of 1-hydroxy-2-pyridinethione ("zinc pyrithione" or "ZPT", zinc pyrithione).

[0117] In the present invention, salicylic acid may be water soluble at a pH of 4.8 or greater. In the present invention, piroctone olamine and menthol are oil soluble.

[0118] In the present invention, the scalp active may be sulfur or selenium sulfide. Additionally, salicylic acid may be combined with piroctone olamine, zinc pyrithione, sulfur, selenium sulfide, or any combination thereof.

[0119] Any scalp active may be present in the composition in an amount of from about 0.01% to about 3% of the antidandruff agent or other scalp active by weight of the composition, which may be from about 0.1% to 2%, or from about 0.25% to about 1%, or from about 0.5% to 1%.

[0120] D. Rheology Modifiers In the present invention, the scalp composition may contain a rheology modifier to increase the substantivity and stability of the composition. Any suitable rheology modifier may be used. In the present invention, the scalp composition may contain about 0.05% to about 10% of a rheology modifier, or about 0.1% to about 10% of a rheology modifier, or about 0.5% to about 2% of a rheology modifier, or about 0.7% to about 2% of a rheology modifier, and / or about 1% to about 1.5% of a rheology modifier. In the present invention, the rheology modifier may be an ethoxylated (20) sorbitan ester, such as Tween 20. In the present invention, the rheology modifier may be a polymeric rheology modifier.

[0121] In the present invention, the scalp composition may include a rheology modifier that is a homopolymer based on acrylic acid, methacrylic acid, or other related derivatives, non-limiting examples of which include polyacrylates, polymethacrylates, polyethylacrylates, and polyacrylamides.

[0122] In the present invention, the rheology modifier may be alkali-swellable and hydrophobically modified alkali-swellable acrylic or methacrylate copolymers, non-limiting examples of which include acrylic acid / acrylonitrile copolymer, acrylates / steareth-20 itaconate copolymer, acrylates / ceteth-20 itaconate copolymer, acrylates / aminoacrylate copolymer, acrylates / steareth-20 methacrylate copolymer, acrylates / beheneth-25 methacrylate copolymer, acrylates / steareth-20 methacrylate crosspolymer, acrylates / vinyl neodecanoate crosspolymer, and acrylates / C10-C30 alkyl acrylate crosspolymer.

[0123] In the present invention, the rheology modifier may be a crosslinked acrylic polymer, a non-limiting example of which is carbomer.

[0124] In the present invention, the rheology modifier may be an alginate-based material, non-limiting examples of which include sodium alginate and propylene glycol alginate.

[0125] In the present invention, the rheology modifier may be an associative polymeric thickener (non-limiting examples include hydrophobically modified cellulose derivatives), hydrophobically modified alkoxylated urethane polymers (non-limiting examples include PEG-150 / decyl alcohol / SMDI copolymer, PEG-150 / stearyl alcohol / SMDI copolymer, polyurethane-39), hydrophobically modified alkali swellable emulsions (non-limiting examples include hydrophobically modified polyacrylates, hydrophobically modified polyacrylic acids, and hydrophobically modified polyacrylamides), hydrophobically modified polyethers, which may have a hydrophobic moiety that can be selected from cetyl, stearyl, oleayl, and combinations thereof, and a hydrophilic moiety of repeating ethylene oxide groups having 10 to 300, or 30 to 200, and / or 40 to 150 repeat units. Non-limiting examples of this class include PEG-120-methyl glucose dioleate, PEG-(40 or 60) sorbitan tetraoleate, PEG-150 pentaerythrityl tetrastearate, PEG-55 propylene glycol oleate, PEG-150 distearate.

[0126] In the present invention, the rheology modifier can be cellulose and derivatives, non-limiting examples of which include microcrystalline cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, ethyl cellulose, nitrocellulose, cellulose sulfate, cellulose powder, and hydrophobically modified cellulose.

[0127] In the present invention, the rheology modifiers can be guar and guar derivatives, non-limiting examples of which include hydroxypropyl guar and hydroxypropyl guar hydroxypropyltrimonium chloride.

[0128] In the present invention, the rheology modifier can be polyethylene oxide, polypropylene oxide, and POE-PPO copolymers.

[0129] In the present invention, the rheology modifier can be polyvinylpyrrolidone, crosslinked polyvinylpyrrolidone and derivatives. In the present invention, the rheology modifier can be polyvinyl alcohol and derivatives.

[0130] In the present invention, the rheology modifier can be polyethyleneimine and derivatives.

[0131] In the present invention, the rheology modifier can be silica, non-limiting examples of which include fumed silica, precipitated silica, and silicone surface treated silica.

[0132] In the present invention, the rheology modifier may be a water-swellable clay, non-limiting examples of which include laponite, bentolite, montmorillonite, smectite, and hectonite.

[0133] In the present invention, the rheology modifier may be a gum, non-limiting examples of which include xanthan gum, guar gum, hydroxypropyl guar gum, gum arabic, tragacanth, galactan, carob gum, karaya gum, and locust bean gum.

[0134] In the present invention, the rheology modifier can be dibenzylidene sorbitol, carrageenan, pectin, agar, quince seed (marmelo), starch (from rice, corn, potato, wheat, etc.), starch derivatives (e.g., carboxymethyl starch, methylhydroxypropyl starch), algae extract, dextran, succinoglucan, and prelan.

[0135] Non-limiting examples of rheology modifiers include acrylamide / ammonium acrylate copolymer (and) polyisobutene (and) polysorbate 20, acrylamide / sodium acryloyldimethyltaurate copolymer / isohexadecane / polysorbate 80, acrylate copolymer; acrylates / beheneth-25 methacrylate copolymer, acrylates / C10-C30 alkyl acrylate crosspolymer, acrylates / steareth-20 itaconate copolymer, ammonium polyacrylate / isohexadecane / PEG-40 castor oil, C12-16 alkyl PEG-2 hydroxypropyl hydroxyethyl ethylcellulose (HM-EHEC), carbomer, cross-linked polyvinylpyrrolidone (PVP), dibenzylidene sorbitol, hydroxyethyl ethylcellulose (EHEC), hydroxypropyl methylcellulose (hydroxypropyl methylcellulose), and the like. Examples of suitable cellulose acetate preparations include methylcellulose (HPMC), hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), methylcellulose (MC), methylhydroxyethyl cellulose (MEHEC), PEG-150 / decyl alcohol / SMDI copolymer, PEG-150 / stearyl alcohol / SMDI copolymer, polyacrylamide / C13-14 isoparaffin / laureth-7; polyacrylate 13 / polyisobutene / polysorbate 20; polyacrylate crosspolymer-6, polyamide-3; polyquaternium-37 (and) hydrogenated polydecene (and) trideceth-6, polyurethane-39, sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide crosspolymer (and) isohexadecane (and) polysorbate 60; and sodium polyacrylate.Exemplary commercially available rheology modifiers include ACULYN™ 28, Klucel M CS, Klucel H CS, Klucel G CS, SYLVACLEAR AF1900V, SYLVACLEAR PA1200V, Benecel E10M, Benecel K35M, Optasense RMC70, ACULYN™ 33, ACULYN™ 46, ACULYN™ 22, ACULYN™ 44, Carbopol Ultrez 20, Carbopol Ultrez 21, Carbopol Ultrez 10, Carbopol Ulterez 30, Carbopol 1342, Sepigel™ 305, Simulgel™ 600, Sepimax Zen, and combinations thereof.

[0136] E. Additional Conditioning Agents The composition may also contain one or more conditioning agents in addition to the conditioning delivered by the discrete particles. Conditioning agents include materials used to provide special conditioning benefits to hair and / or skin. Conditioning agents useful in the composition typically comprise water-insoluble, water-dispersible, non-volatile liquids that form emulsified liquid particles. Conditioning agents suitable for use in the composition are generally characterized as silicones (e.g., silicone oils, cationic silicones, silicone gums, high refractive index silicones, and silicone resins), organic conditioning oils (e.g., hydrocarbon oils, polyolefins, and fatty acid esters), or combinations thereof, or otherwise form liquid dispersed particles in an aqueous surfactant matrix.

[0137] The scalp composition may further comprise a non-volatile silicone oil. For opaque compositions of the present invention, the cleansing composition comprises a non-volatile silicone oil having a particle size of about 1 μm to about 50 μm as measured in the cleansing composition. The cleansing composition may also comprise a non-volatile silicone oil having a particle size of about 100 nm to about 1 μm as measured in the cleansing composition. For substantially transparent compositions of the present invention, the cleansing composition may comprise a non-volatile silicone oil having a particle size of less than about 100 nm as measured in the cleansing composition.

[0138] When present, the one or more conditioning agents are in an amount of from about 0.01% to about 10% by weight of the composition, optionally from about 0.1% to about 8% by weight, and optionally from about 0.2% to about 4% by weight.

[0139] The conditioning agent may be present in discrete particles or may be added to the final scalp composition as a separate component so that the conditioning agent is primarily present in the continuous phase of the composition.

[0140] F. High-melting point aliphatic compounds The composition of the present invention may contain a high-melting-point fatty compound. The high-melting-point fatty compound is contained in the composition at a concentration that can be about 0.1% to about 20% by weight of the composition, alternatively about 1% to about 15% by weight, or even about 1.5% to about 8% by weight.

[0141] High-melting-point aliphatic compounds useful herein have melting points of 25°C or higher to 60°C, may have melting points of 30°C to 60°C, or may have melting points of 40°C or higher, and are selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, and mixtures thereof. Those skilled in the art will understand that the compounds disclosed in this section of the specification may in some cases belong to more than one classification; for example, some fatty alcohol derivatives may also be classified as fatty acid derivatives. However, a given classification is not intended to limit the specific compound, but is made so for the convenience of classification and nomenclature. Furthermore, those skilled in the art will understand that, depending on the number and position of double bonds and the length and position of branching, the melting point of certain compounds having certain essential carbon atoms may be below 25°C. Such compounds with low melting points are not intended to be included in this section. Non-limiting examples of high melting point compounds are found in the International Cosmetic Ingredient Dictionary, Fifth Edition, 1993, and the CTFA Cosmetic Ingredient Handbook, Second Edition, 1992.

[0142] Among various high-melting point fatty compounds, fatty alcohols can be used in the compositions of the present invention. The fatty alcohols useful herein have from about 14 to about 30 carbon atoms, and may have from about 16 to about 22 carbon atoms. These fatty alcohols can be saturated and straight-chain or branched-chain alcohols. The present invention can include fatty alcohols such as cetyl alcohol, stearyl alcohol, behenyl alcohol, and mixtures thereof.

[0143] A single compound of a high-purity, high-melting-point fatty acid compound can be used in the present invention. A single compound of a pure fatty alcohol selected from the group consisting of pure cetyl alcohol, stearyl alcohol, and behenyl alcohol can be used in the present invention. "Pure" as used herein means that the compound has a purity of at least about 90%, and may be at least about 95%. These high-purity single compounds provide excellent rinsability when consumers rinse off the composition.

[0144] Other optional ingredients The composition may contain other optional components, which may be present in the dispersed gel network phase or may be added to the final cleaning composition as separate components.

[0145] For example, the composition may contain water-soluble and water-insoluble vitamins such as vitamins B1, B2, B6, B12, C, pantothenic acid, pantothenyl ethyl ether, panthenol, biotin and their derivatives, and vitamins A, D, E and their derivatives. The composition may also contain water-soluble and water-insoluble amino acids such as asparagine, alanine, indole, glutamic acid and their salts, and tyrosine, tryptamine, lysine, histadine and their salts. The composition may further contain substances useful for preventing hair loss and promoting or promoting hair growth.

[0146] Any other suitable optional components, such as ingredients conventionally used in a given product type, can also be included in the composition. The CTFA Cosmetic Ingredient Handbook, Tenth Edition (2004), published by the Cosmetic, Toiletry, and Fragrance Association, Inc., Washington, DC, describes a wide variety of non-limiting materials that can be added to the compositions herein. Examples of these classes of ingredients include abrasives, absorbents, aesthetic components such as fragrances and fragrances, pigments, colorants / colorants, essential oils, skin sensates, astringents and the like (e.g., clove oil, menthol, camphor, eucalyptus oil, eugenol, menthyl lactate, witch hazel distillate), anti-acne agents, anti-caking agents, anti-foaming agents, antimicrobial agents (e.g., iodopropyl butylcarbamate), antibacterial agents, antifungal agents, antioxidants, binders, biological additives, buffers, bulking agents, chelating agents, chemical additives, colorants, cosmetic astringents, cosmetic biocides, denaturing agents, pharmaceutical astringents, topical analgesics, film formers or film-forming substances, such as polymers to aid in the film-forming properties and substantivity of the composition (e.g., copolymers of eicosene and vinylpyrrolidone), opacifiers, pH adjusters, herbal derivatives, herbal extracts, herbal tissue extracts, herbal seed extracts, herbal oils, plant extracts, plant soluble and plant-based additives, and the like. Examples of suitable skin care products include, but are not limited to, plant extracts, preservatives, propellants, reducing agents, sebum control agents, sequestrants, skin bleaching and lightening agents (e.g., hydroquinone, kojic acid, ascorbic acid, magnesium ascorbyl phosphate, ascorbyl glucoside, pyridoxine), enzymes, coenzymes, skin conditioning agents (e.g., moisturizers and occlusive agents), skin soothing and / or treating agents and derivatives (e.g., panthenol and derivatives such as ethyl panthenol, aloe vera, pantothenic acid and its derivatives, allantoin, bisabolol, and dipotassium glycyrrhizinate), skin treatment agents (e.g., vitamin D compounds, mono-, di-, and tri-terpenoids, β-ionol, cedrol), thickeners (including monovalent or divalent salts such as sodium chloride), and vitamins, their derivatives, and combinations thereof.

[0147] Formulations and Examples The following are non-limiting examples of the present invention, which are provided for illustrative purposes only and should not be construed as limiting the present invention, as those skilled in the art will recognize that many variations thereof are possible without departing from the spirit and scope of the present invention.

[0148] Formulation Preparation and Treatment Protocol for Forming Discrete Particles Containing Scalp Actives Preparation of discrete particles: The discrete particle composition is prepared by adding the scalp active (piroctone olamine) to an oil-soluble matrix (a cationic or anionic surfactant containing a fatty alcohol), along with all other ingredients (rheology modifiers, pigments, and sensates) in a container and heating to 80°C to melt and form a homogeneous mixture. Once the melt is a homogeneous solution, it is poured into a mold to form a specific shape, or spread onto a sheet, crushed into small shapes, and sieved to obtain the desired size. Discrete particles can be made with a 1:1:1 mixture of SLS (sodium lauryl sulfate) powder, ceterath-25, and fatty alcohols (cetyl and stearyl alcohols).

[0149] Preparation of scalp composition: The scalp composition can suspend the discrete particles and mix with other shampoos to deliver the desired shampoo and scalp benefit (anti-dandruff) to the consumer.

[0150] The scalp composition comprises from about 0.01% to about 5% by weight of the scalp composition of a compound selected from the group consisting of a polyquaternium polymer or anionic surfactant and mixtures thereof, and may be from about 0.05% to about 3%, or may be from about 0.1% to about 2% by weight. After mixing this with other hair care product compositions and applying it to the scalp and hair, the method then includes rinsing the scalp composition from the hair.

[0151] The swelling of the discrete particles can be carried out sequentially by first soaking the discrete particles separately in an aqueous solution for 0.5 to 3 hours and then adding them to the scalp composition, or by adding the discrete particles simultaneously to the scalp composition and allowing them to swell completely for 3 to 4 days.

[0152] Evaluation method The evaluation of the discrete particle composition in the scalp composition uses the following method.

[0153] Discrete Particle Stability: Store samples in glass jars at room temperature. Record visible changes in particle shape / size / appearance daily and after 1 month. S=Stable, U=Unstable.

[0154] Discrete Particle Spreadability: The particle spreadability is scored on the day of sample preparation. The spreadability score is scored by the panel for the formulation, with 0 being difficult to spread and 5 being very easy / soft to spread in the hand using fingers.

[0155] Discrete particle compression measurements The method described herein characterizes the degree to which discrete particles have softened in a product. The method uses a Kawabata KES-FB3-Auto Compression Tester manufactured by Kato Tech, LTD, or a similar device. The following are the instrument settings used herein for the Kawabata KES-FB3-Auto Compression Tester: Sensitivity: 2, Speed: 0.02 mm / sec, Stroke: 10, Zone or Probe Compression Area: 2 (corresponding to a standard 16 mm compression probe), Process Speed: 0.1, Maximum Load: 50 gf / cm2.

[0156] Sample preparation for compression measurements Product samples are prepared for measurement by incorporating discrete particles into the final product (e.g., approximately 10 discrete particles per 5 grams of a cleaning composition, such as shampoo) so that the discrete particles are effectively coated by the product. These discrete particles are sampled from the product one by one at various time intervals using a small spatula, taking care not to deform the discrete particles during extraction. Without being limited to a specific time scale, compression of the discrete particles is performed at the following time intervals (hours): 0, 1, 3, 6, and 24 hours. Following appropriate instrument calibration and measurement setup, the discrete particles are carefully extracted from the product and centered on the sample stage of the KES-FB3-A Compression Tester under the compression probe in preparation for sample analysis.

[0157] [Table 2] 1 Supplied by P&G Chemicals 2 Supplied by P&G Chemicals 3 Supplied by Feixiang Chemicals (Zhangjingang) Co., Ltd. 4 UNIPURE BLUE LC686(Sensient) 5 GPR RECTAPUR®, VWR Chemicals 6 Octopirox, Clariant 7 Jungbunzlauer Austria 8 Supplied by Ineos Maastricht BV (Maastricht NL)

[0158] Example 2 demonstrates that incorporating scalp actives into discrete particles Control Example 1 causes particle destabilization due to pH changes. Example 3 demonstrates particle stabilization by stabilizing the pH of the matrix, resulting in less spreadable particles. Example 4 demonstrates the inclusion of a nonionic surfactant, which acts as a rheology modifier by softening the particles. Example 5 results in larger particles, but instability due to over-swelling of the particles in the scalp composition. Example 6 is an example of the present invention, where the discrete particles are softer and more stable than Examples 2-5. Example 7 is a larger particle size, milled and sieved to select the desired particle size.

[0159] [Table 3] 1 Cosmedia® Ultragel® 300 - BASF 2 Sodium lauryl sulfate 3 Jaguar Excel (Solvay) 4 Methocel 40-101 (Dow Chemical)

[0160] Example 9 demonstrates that adding Discrete Particle Example 2 to a scalp composition results in a high pH composition due to the addition of piroctone olamine, thereby causing instability. Example 10 has Discrete Particle Example 3, which hardens while stabilizing the pH of the scalp composition. Example 11 contains Discrete Particle Example 4, but exhibits instability due to overswelling. For example, Example 12 has Discrete Particle Example 5. Formulation Examples 13 and 14, with a desired pH of 5, demonstrate the stability of both the discrete particles and the scalp composition. Examples 15 and 16 embody the inclusion of an anionic surfactant, an amphoteric surfactant, and a cationic guar to enhance the cosmetic performance of the composition.

[0161] combination A. A clear scalp composition comprising: a) about 0.5% to about 30% by weight of discrete particles comprising: anhydrous particles; and an aqueous phase of the clear scalp composition, wherein the anhydrous particles comprise one or more fatty amphiphiles selected from the group consisting of fatty alcohols, fatty esters, fatty acids, fatty amides, and mixtures thereof, and one or more surfactants selected from the group consisting of cationic, anionic, nonionic, zwitterionic, or mixtures thereof, and the anhydrous particles comprise one or more scalp actives, the discrete particles having a size of about 200 micrometers to about 25,000 micrometers; and b) an aqueous phase comprising a water-soluble polymer and an aqueous carrier, wherein the clear scalp composition has a pH of about 3.5 to about 7.0. B. The clear scalp composition of paragraph A, wherein the one or more surfactants are cationic surfactants. C. The transparent scalp composition of paragraphs A-B, wherein the cationic surfactant is behentrimonium methosulfate. D. The transparent scalp composition of paragraphs A-C, wherein the discrete particles have a size of about 500 μm to about 7000 μm. E. The transparent scalp composition of paragraphs A-D, wherein the discrete particles have a size of about 1000 μm to about 5000 μm. F. The clear scalp composition of paragraphs A-E, wherein the scalp active is selected from the group consisting of piroctone olamine, climbazole, salicylic acid, zinc pyrithione, selenium sulfide, sulfur, menthol, and mixtures thereof. G. The clear scalp composition of paragraphs A-F, wherein the scalp active is piroctone olamine. H. The clear scalp composition of paragraphs A-G, wherein the discrete particles comprise about 0.25% to 1% piroctone olamine. I. The transparent scalp composition according to paragraphs AH, having a pH of about 3.5 to about 5. J. The transparent scalp composition according to paragraphs AI, wherein the water-soluble polymer is a cationic polymer. K. The transparent scalp composition of paragraphs AJ, wherein the cationic polymer is polyquaternium-37. L. The transparent scalp composition of paragraphs A-K, wherein the cationic polymer is a cationic guar polymer. M. The transparent scalp composition of paragraphs A-L, wherein the cationic polymer is polyquaternium-10. N. The transparent scalp composition of paragraphs A-M, wherein the cationic polymer is diallyldimethylammonium chloride. O. The clear scalp composition of paragraphs A-N, wherein the water-soluble polymer is present at about 0.05% to about 5%. P. The clear scalp composition of paragraphs A-O, wherein the water-soluble polymer is present at about 0.3% to about 1%. Q. The clear scalp composition of paragraphs A-P, wherein the aqueous carrier is selected from the group consisting of water or a miscible mixture of water and an organic solvent. R. The clear scalp composition of paragraphs A-Q, wherein the aqueous carrier is a surfactant selected from the group consisting of anionic, amphoteric, zwitterionic, or nonionic surfactants. S. The transparent scalp composition of paragraphs A-R, wherein swelling of the discrete particles is completed sequentially by first soaking the discrete particles separately in an aqueous solution for 0.5 to 3 hours and then adding them to the transparent scalp composition. T. The clear scalp composition of paragraphs A-S, wherein the swelling of the discrete particles is completed by adding the discrete particles to the clear scalp composition simultaneously and allowing them to fully swell for 3-4 days. U. The transparent scalp composition of paragraphs A-T, wherein the transparent scalp composition is transparent and exhibits a haze of <50%. V. The clear scalp composition of paragraphs A-U, wherein the discrete particles are spreadable between the fingers of a hand and stable when sheared. W. The clear scalp composition of paragraphs A-V, wherein the discrete particles are swellable particles that allow for packaging of the clear scalp composition in a packaging device. X. The clear scalp composition of paragraphs A-W, wherein the discrete particles swell to about 1.5 times to about 4 times their original size when combined with the clear scalp composition. Y. The clear scalp composition of paragraphs A-X, wherein the discrete particles swell to four times their original size when combined with the clear scalp composition.

[0162] It will be understood that other modifications of the present disclosure within the skill of those skilled in the art of hair care formulations can be made without departing from the spirit and scope of the present invention. All parts, percentages, and ratios herein are by weight unless otherwise specified. Some components may be supplied as dilute solutions by the supplier. The concentrations listed represent the weight percent of actives unless otherwise specified. Fragrance and / or preservative concentrations may also be included in the following examples.

[0163] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

[0164] All documents cited herein, including cross-referenced or related patents or applications, are incorporated herein by reference in their entirety, unless expressly excluded or otherwise limited. The citation of any document shall not be deemed to be prior art to any invention disclosed or claimed herein, or that it, alone or in combination with any other reference(s), teaches, suggests, or discloses any such invention. Furthermore, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall control.

[0165] While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. A transparent scalp composition, a) 0.5% to 30% by weight of discrete particles comprising anhydrous particles and an aqueous phase of the clear scalp composition, the anhydrous particles comprising one or more fatty amphiphiles selected from the group consisting of fatty alcohols, fatty esters, fatty acids, fatty amides, and mixtures thereof, and one or more surfactants selected from the group consisting of cationic, anionic, nonionic, zwitterionic, or mixtures thereof, the anhydrous particles comprising one or more scalp actives, the discrete particles having a size of 200 micrometers to 25,000 micrometers; b) an aqueous phase comprising a water-soluble polymer and an aqueous carrier; The transparent scalp composition has a pH of 3.5 to 7.0, preferably, the pH is 3.5 to 5.

2. 2. The clear scalp composition of claim 1, wherein the one or more surfactants are cationic surfactants, preferably the cationic surfactant is behentrimonium methosulfate.

3. The transparent scalp composition according to any one of claims 1 to 2, wherein the size of the discrete particles is from 500 μm to 7000 μm, preferably from 1000 μm to 5000 μm.

4. 4. The transparent scalp composition according to any one of claims 1 to 3, wherein the scalp active is selected from the group consisting of piroctone olamine, climbazole, salicylic acid, zinc pyrithione, selenium sulfide, sulfur, menthol, and mixtures thereof, preferably the scalp active is piroctone olamine.

5. The transparent scalp composition according to any one of claims 1 to 4, wherein the discrete particles comprise 0.25% to 1% piroctone olamine.

6. The transparent scalp composition according to any one of claims 1 to 5, wherein the water-soluble polymer is a cationic polymer, preferably the cationic polymer is polyquaternium-37, preferably the cationic polymer is a cationic guar polymer, preferably the cationic polymer is polyquaternium-10, preferably the cationic polymer is diallyldimethylammonium chloride.

7. The transparent scalp composition according to any one of claims 1 to 6, wherein the water-soluble polymer is present at 0.05% to 5%, preferably the water-soluble polymer is present at 0.3% to 1%.

8. The transparent scalp composition according to any one of claims 1 to 7, wherein the aqueous carrier is selected from the group consisting of water or a miscible mixture of water and an organic solvent.

9. The transparent scalp composition according to any one of claims 1 to 8, wherein the aqueous carrier is a surfactant selected from the group consisting of anionic, amphoteric, zwitterionic, or nonionic surfactants.

10. 10. The transparent scalp composition according to any one of claims 1 to 9, wherein the swelling of the discrete particles is completed sequentially by first immersing the discrete particles separately in an aqueous solution for 0.5 to 3 hours, and then adding them to the transparent scalp composition.

11. 11. The transparent scalp composition according to claim 1, wherein the swelling of the discrete particles is completed by adding the discrete particles to the transparent scalp composition simultaneously and allowing them to swell completely for 3 to 4 days.

12. The transparent scalp composition according to any one of claims 1 to 11, wherein the transparent scalp composition is transparent and exhibits a haze of <50%.

13. 13. The transparent scalp composition of any one of claims 1 to 12, wherein the discrete particles are spreadable between the fingers of a hand and stable when sheared.

14. The transparent scalp composition according to any one of claims 1 to 13, wherein the discrete particles are swellable particles that allow packaging of the transparent scalp composition in a packaging device.

15. 15. The transparent scalp composition according to any one of claims 1 to 14, wherein the discrete particles swell to 1.5 to 4 times their original size when combined with the transparent scalp composition, preferably the discrete particles swell to 4 times their original size when combined with the transparent scalp composition.

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