Multifunctional hair care composition

Abstract

A translucent hair care composition comprising a substituted 2-pyridinol-N-oxide material, a cationic surfactant, an aliphatic alcohol, a water-soluble polymer, water, and a monocarboxylic acid.

Description

[Technical Field]

[0001] This invention relates to a multifunctional hair care composition. [Background technology]

[0002] For many years, anti-dandruff shampoos have been widely used to treat dandruff and cleanse hair and scalp. However, for consumers with severe dandruff problems such as flaking, itching, or oily or dry scalp, using anti-dandruff shampoo alone is often insufficient. This is because the use of only one product limits the adhesion or delivery of anti-dandruff active ingredients to the scalp. Anti-dandruff conditioners have been on the market for many years, but these rinse-off anti-dandruff conditioners are products with a high viscosity and greasy appearance. In reality, these products are often simply ordinary hair conditioning products with added anti-dandruff active ingredients. As a result, most consumers carefully apply these products to their hair while intentionally avoiding contact with their scalp, which means that consumers do not receive the anti-dandruff effect of the product. Leave-on anti-dandruff conditioners come in various forms such as spatonics, lotions, and creams. However, the problem with these products is that while they can provide anti-dandruff effects, their hair conditioning is often very poor. In fact, most of them are detrimental to hair conditioning, either increasing friction or leaving a sticky or greasy residue on the hair. Consequently, consumers cannot use these products daily, and they are not very popular in the market. Therefore, there is a need for a multi-functional conditioner—one that consumers can apply to their scalp to achieve anti-dandruff effects while still providing the hair conditioning that consumers expect and desire.

[0003] Furthermore, consumers desire a minimal number of ingredients in a product and want to understand why each ingredient is necessary. Many consumers expect the label to state that the composition does not contain unnecessary chemicals, especially for products applied directly to the scalp, which may already be sensitive due to symptoms of flaking and itching. As a result, formulaters need to work to eliminate or minimize the number of ingredients that do not primarily serve the consumer's benefit, such as preservatives, stabilizers, or solvents. [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Therefore, there is a continuing need for hair conditioners that not only provide dandruff prevention but also improve hair texture, appearance, and manageability, while simultaneously incorporating natural and multi-functional substances. [Means for solving the problem]

[0005] A translucent hair care composition, a) Substituted 2-pyridinol-N-oxide substance, b) A cationic surfactant having a melting point higher than 40°C, c) Aliphatic alcohols having a melting point higher than 40°C, d) A water-soluble polymer having a naturally occurring skeleton selected from the group consisting of cellulose, starch, guar, and gellan, e) Water and, f) comprising a monocarboxylic acid, The composition has a pH of approximately 3.5 to approximately 6.0. The composition has a light transmittance percentage of more than 10% as measured at 600 nm. A composition having a viscosity of approximately 10 Pa·s to approximately 100 Pa·s. [Modes for carrying out the invention]

[0006] This specification concludes with the "claims" that specifically point out and clearly claim the invention, but the invention is considered to be better understood from the following description.

[0007] As used herein, "comprising" means that other steps and other components that do not affect the final result may be added. This term encompasses the terms "consisting of" and "consisting essentially of".

[0008] All percentages, parts, and ratios are based on the total weight of the composition of the invention, unless otherwise specified. All such weights related to the described components are based on the active level and thus do not include carriers or by-products that may be contained in commercially available materials.

[0009] As used herein, "mixture" means a simple combination of materials and any compound that may be obtained from such a combination.

[0010] The term "molecular weight" or "M.Wt.", when used herein, refers to the weight average molecular weight, unless otherwise specified.

[0011] "QS" means an amount sufficient to make it 100%.

[0012] "Substantially free of" refers to about 2% or less, about 1% or less, or about 0.1% or less of the described component. "Free of" refers to an undetectable amount of the described component or thing.

[0013] Hair care composition The present invention provides a combination of multifunctional ingredients that can provide multiple benefits, including dandruff prevention, anti-itch, soothing, fragrance, preservation, moisturizing, and drying conditioning, while having nine or fewer ingredients. The viscosity of the product may be between that of a cream and a lotion, and the color may be translucent. When the inventors sought to solve the problem of providing a hair care composition that provides the numerous benefits described without having a very large number of ingredients, they recognized that one ingredient must perform multiple functions. Furthermore, they wanted to incorporate natural ingredients that consumers would like. For example, the surfactant stearylamidopropyldimethylamine (stearamidopropyldimethylammonium), SAPDMA, is of natural origin and has a tertiary amine head group, which allows the inventor to freely select an acid to protonate it (convert it into a cationic surfactant). Furthermore, salicylic acid may be selected, in which case the need to add preservatives is reduced or eliminated.

[0014] Anti-dandruff active ingredients Piroctone and piroctone salts such as piroctone olamine are known to provide anti-dandruff effects. However, piroctone olamine is often supplied as a crystalline powder and is known to have very limited solubility in water, which means that reliably solubilizing the anti-dandruff active ingredient with the simplest possible combination of substances is a challenge.

[0015] The inventors have found that certain solid organic compounds, such as piroctone and / or its salts, tend to crystallize under the following conditions: -When the aqueous composition contains a cationic surfactant and a high-melting-point aliphatic compound, -When the amount of solid organic compounds in the composition increases, especially when it is 0.2% or more, and / or -When the composition has a pH of about 3.5 to about 6.

[0016] Piroctone olamine in conditioners is typically solubilized at high concentrations (about 5%) by certain oils. These oils are typically emulsified with cationic surfactants and high-melting-point aliphatic compounds, resulting in a highly viscous and opaque product. In contrast, the present invention does not use such oils (which make hair and scalp oily), but instead uses a specific surfactant body, such as SAPDMA, and a specific acid as a counterion, in a specific ratio of surfactant body / acid / piroctone olamine to obtain a desired pH range in which piroctone olamine functions and adheres better to the scalp. This results in dandruff control and good conditioning without the use of excessive cationic surfactants and high-melting-point aliphatic compounds.

[0017] In some embodiments, the anti-dandruff active substance may be a substituted 2-pyridinol-N-oxide substance such as piroctone olamine or cyclopirox olamine. Piroctone olamine and cyclopirox olamine are salts of piroctone and cyclopirox with monoethanolamine, respectively. In compositions having an acidic pH, these are protonated to piroctone and cyclopirox, respectively. In the present invention, the composition preferably has an acidic pH, more preferably about 2 to about 6, even more preferably about 3.5 to about 6, and still more preferably about 3.5 to about 5.

[0018] The present invention may also contain one or more soluble scalp health active substances, which may be one material or a mixture selected from the group consisting of azoles such as crimbazole, ketoconazole, itraconazole, econazole, and erbiol; hydroxypyridones such as piroctone olamine, cyclopirox, rilopirox, and MEA-hydroxyoctyloxypyridinone; strobilurins such as azoxystrobin; and metal chelating agents such as 1,10-phenanthroline.

[0019] The azole-soluble scalp health active substance may be an imidazole selected from the group consisting of benzimidazole, benzothiazole, bifonazole, butaconazole nitrate, crimbazole, clotrimazole, croconazole, everconazole, econazole, erbiol, fenticonazole, fluconazole, flutimazole, isoconazole, ketoconazole, lanoconazole, metronidazole, miconazole, neticonazole, omoconazole, oxiconazole nitrate, sertaconazole, sarconazole nitrate, thioconazole, thiazole, and mixtures thereof, or the azole antibacterial agent may be a triazole selected from the group consisting of terconazole, itraconazole, and mixtures thereof. The azole-soluble scalp health active substance may be ketoconazole. The sole soluble scalp health active agent may be ketoconazole.

[0020] These anti-dandruff and scalp health active compounds are not soluble in typical solvents such as water or aqueous mixtures, for example, even in high concentrations of glycerin or propylene glycol in water. They typically require either high concentrations (more than 5% or even more than 10%) of skin-softening oils such as triethylhexanoin or octyldodecyl myristate, or high concentrations (more than 50%) of alcohols such as ethanol. The former (oils) are known to produce an unpleasant oily feeling on the scalp and hair, and the latter (alcohols) are known to cause hesitation among most consumers when applied to scalps already sensitive due to dandruff. This invention solubilizes such anti-dandruff active substances by combining a surfactant (primarily necessary for hair conditioning) and a specific acid (primarily necessary for pH adjustment). Nothing other than these two substances is needed to formulate these anti-dandruff and scalp health active substances into a soluble form in liquid.

[0021] Anti-dandruff agents or other scalp-activating substances may be present in the composition in an amount of approximately 0.01% to approximately 2% by weight.

[0022] Cationic surfactants The hair care composition of the present invention may contain a cationic surfactant. In some embodiments, the cationic surfactant may be stearylamidopropyldimethylamine (stearamidopropyldimethylammonium) or SAPDMA.

[0023] The ratio of cationic surfactant to anti-dandruff active substance may be 2.4 to 6.2 (weight / weight) (or 2 to 5 (moles / moles)), preferably 3.1 to 5.5 (weight / weight) (or 2.5 to 4.5 (moles / moles)), or 3.0 to 4.0 (moles / moles). Outside this ratio range, crystallization of piroctone olamine remaining in the composition may occur, or the piroctone concentration may be too low to be effective, or the surfactant concentration may be too high, or the composition may be very oily.

[0024] The cationic surfactant may be a single cationic surfactant or a mixture of two or more cationic surfactants. Preferably, the cationic surfactant system is selected from mono-long-chain alkyl quaternization ammonium salts; combinations of mono-long-chain alkyl quaternization ammonium salts and di-long-chain alkyl quaternization ammonium salts; mono-long-chain alkylamidoamine salts; and combinations of mono-long-chain alkylamidoamine salts and di-long-chain alkyl quaternization ammonium salts. More preferably, the cationic surfactant system is a mixture of mono-long-chain alkyl quaternization ammonium salts and di-long-chain alkyl quaternization ammonium salts. The selection of anions as counterions for forming the surfactant salts is described in a later section titled "Acids".

[0025] Mono-long-chain alkyl quaternary ammonium salts The monoalkyl quaternized ammonium salt cationic surfactants useful herein have one alkyl long chain having 12 to 30 carbon atoms, preferably 16 to 24 carbon atoms, more preferably a C18-22 alkyl group. The remaining groups bonded to nitrogen are independently selected from alkyl groups having 1 to about 4 carbon atoms, or alkoxy groups, polyoxyalkylene groups, alkylamide groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 4 carbon atoms.

[0026] The mono long-chain alkyl quaternized ammonium salts useful herein have the following formula (I):

[0027]

Chemical formula

[0028] Non-limiting examples of such mono-long-chain alkyl quaternary ammonium salt cationic surfactants include behenyltrimethylammonium salt, stearyltrimethylammonium salt, cetyltrimethylammonium salt, and hydrogenated tulose alkyltrimethylammonium salt.

[0029] Monolong-chain alkylamidoamine salts Mono-long-chain alkylamines are also suitable as cationic surfactants. Primary, secondary, and tertiary aliphatic amines are useful. Tertiary amide amines having alkyl groups of about 12 to about 22 carbon atoms are particularly useful. Examples of tertiary amide amines include stearamidopropyldimethylamine, stearamidopropyldiethylamine, stearamidoethyldiethylamine, stearamidoethyldimethylamine, palmitamidopropyldimethylamine, palmitamidopropyldiethylamine, palmitamidoethyldiethylamine, palmitamidoethyldimethylamine, behenamidopropyldimethylamine, behenamidopropyldiethylamine, behenamidoethyldiethylamine, behenamidoethyldimethylamine, arachidamidopropyldimethylamine, arachidamidopropyldiethylamine, arachidamidoethyldiethylamine, arachidamiethyldimethylamine, and diethylaminoethylstearamide. Amines useful in the present invention are disclosed in U.S. Patent No. 4,275,055 (Nachtigal et al.). These amines are 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; more preferably, they can be used in combination with acids such as salicylic acid, L-glutamic acid, lactic acid, aspartic acid, glycolic acid, lactobionic acid or glucolactone. The amines herein are preferably partially neutralized by any of the acids in a molar ratio of amine to acid of about 1:1 to about 1:4, more preferably about 1:1.1 to about 1:3.2.

[0030] Dilong-chain alkyl quaternary ammonium salts Di-long-chain alkyl quaternization ammonium salts are preferably combined with mono-long-chain alkyl quaternization ammonium salts or mono-long-chain alkylamidoamine salts. Such combinations are thought to provide a feeling of easier rinsing compared to the use of mono-long-chain alkyl quaternization ammonium salts or mono-long-chain alkylamidoamine salts alone. In such combinations with mono-long-chain alkyl quaternization ammonium salts or mono-long-chain alkylamidoamine salts, the di-long-chain alkyl quaternization ammonium salt is used at a concentration such that the weight percentage of the di-long-chain alkyl quaternization ammonium salt in the cationic surfactant system is preferably in the range of about 10% to about 50%, more preferably about 30% to about 45%.

[0031] The dialkylquaternary ammonium salt cationic surfactants useful herein have two long alkyl chains having 12 to 30 carbon atoms, preferably 16 to 24 carbon atoms, and more preferably 18 to 22 carbon atoms. The remaining group bonded to the nitrogen is independently selected from alkyl groups having 1 to about 4 carbon atoms, or alkoxy groups, polyoxyalkylene groups, alkylamide groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 4 carbon atoms.

[0032] The di-long-chain alkyl quaternary ammonium salts useful in this specification are given by the following formula (II):

[0033] [ka] (In the formula, R 75 , R 76 , R 77 and R 78 Two of these are selected from alkyl groups with 12 to 30 carbon atoms, or aromatic groups, alkoxy groups, polyoxyalkylene groups, alkylamide groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to approximately 30 carbon atoms, R 75 , R 76 , R 77 , and R 78The remainder of these is independently selected from alkyl groups with 1 to about 4 carbon atoms, or alkoxy groups, polyoxyalkylene groups, alkylamide groups, hydroxyalkyl groups, aryl groups, or alkylaryl groups having up to about 4 carbon atoms, X - The alkyl group has a salt-forming anion, for example, selected from halogens (e.g., chlorides, bromides), acetates, citrates, lactates, glycolates, phosphates, nitrates, sulfonates, sulfates, alkyl sulfates, and alkyl sulfonate groups. The alkyl group may contain carbon and hydrogen atoms, as well as ether and / or ester bonds, and other groups such as amino groups. Longer alkyl groups, for example, those with about 12 or more carbon atoms, may be saturated or unsaturated. Preferably, R 75 , R 76 , R 77 , and R 78 One of these is selected from alkyl groups having 12 to 30 carbon atoms, more preferably 16 to 24 carbon atoms, even more preferably 18 to 22 carbon atoms, and still more preferably 22 carbon atoms, R 75 , R 76 , R 77 , and R 78 The remainder is 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.

[0034] Examples of such dialkylquaternary ammonium salt cationic surfactants include dialkyl(14-18)dimethylammonium chloride, ditaloalkyldimethylammonium chloride, dihydrogenated taloalkyldimethylammonium chloride, distearyldimethylammonium chloride, and dicetyldimethylammonium chloride. Furthermore, examples of such dialkylquaternary ammonium salt cationic surfactants include asymmetric dialkylquaternary ammonium salt cationic surfactants.

[0035] High melting point aliphatic compounds The composition of the present invention may contain a high-melting-point aliphatic compound. The high-melting-point aliphatic compound is contained in the composition at a concentration of preferably about 0.1% to about 20% by weight, more preferably about 1% to about 15% by weight, and even more preferably about 1.5% to about 8% by weight.

[0036] High-melting-point aliphatic compounds useful herein have a melting point of 25°C to 60°C, preferably 30°C to 60°C, and in some embodiments, 40°C or higher, and are selected from the group consisting of aliphatic alcohols, fatty acids, aliphatic alcohol derivatives, fatty acid derivatives, and mixtures thereof. It will be understood by those skilled in the art that compounds disclosed in this section of this specification may, in some cases, belong to two or more classifications (for example, some aliphatic alcohol derivatives may also be classified as fatty acid derivatives). However, given classifications are not intended to limit the specific compounds, but are made so for the convenience of classification and nomenclature. Furthermore, it will be understood by those skilled in the art that, depending on the number and position of double bonds, and the length and position of branching, certain compounds having certain essential carbon atoms may have a melting point below 25°C. Such low-melting-point compounds are not intended to be included in this section. Non-restrictive examples of high-melting-point compounds can be found in the International Cosmetic Ingredient Dictionary, Fifth Edition, 1993, and the CTFA Cosmetic Ingredient Handbook, Second Edition, 1992.

[0037] Among various high-melting-point aliphatic compounds, aliphatic alcohols are preferably used in the compositions of the present invention. Aliphatic alcohols useful herein have about 14 to about 30 carbon atoms, preferably about 16 to about 22 carbon atoms. These aliphatic alcohols are saturated and may be linear or branched alcohols. Preferred aliphatic alcohols include, for example, cetyl alcohol, stearyl alcohol, behenyl alcohol, and mixtures thereof.

[0038] High-purity single-compound high-melting-point aliphatic compounds are preferred. Pure aliphatic alcohol single compounds, selected from the group of pure cetyl alcohol, stearyl alcohol, and behenyl alcohol, are highly preferred. “Pure” in this specification means that the compound has a purity of at least about 90%, preferably at least about 95%. These high-purity single compounds provide excellent rinsability when consumers wash off the composition.

[0039] Water-based carrier The hair care composition of the present invention comprises an aqueous carrier. The level and type of this carrier are selected according to compatibility with other components and other desired properties of the product.

[0040] Useful carriers in the present invention include water, as well as aqueous solutions of lower alkyl alcohols and polyhydric alcohols. Useful lower alkyl alcohols in this specification are monohydric alcohols having 1 to 6 carbon atoms, more preferably ethanol and isopropanol. Useful polyhydric alcohols in this specification include propylene glycol, pentylene glycol, hexylene glycol, glycerin, and propanediol.

[0041] Preferably, the aqueous carrier is substantially water. Preferably, deionized water is used. Depending on the desired properties of the product, water from natural sources containing mineral cations may also be used. Generally, the compositions of the present invention contain about 20% to about 99%, preferably about 30% to about 95%, and more preferably about 80% to about 95% water.

[0042] Gel Matrix Preferably, in the composition of the present invention, a cationic surfactant, a high-melting-point aliphatic compound, and an aqueous carrier form a gel matrix.

[0043] The gel matrix is ​​suitable for providing various conditioning effects, such as a smooth feel while applied to wet hair and a soft and moist feel on dry hair, for example, a hair conditioning effect. Considering the provision of the above gel matrix, the cationic surfactant and the high-melting-point aliphatic compound are contained in concentrations such that the weight ratio of the cationic surfactant to the high-melting-point aliphatic compound is preferably in the range of about 1:1 to about 1:10, more preferably in the range of about 1:1 to about 1:6. To improve the adhesion of the solid organic compound to hair, face, body, and / or scalp, the weight ratio of the cationic surfactant to the high-melting-point aliphatic compound may preferably be in the range of about 1:1 to about 1:4.

[0044] Water-soluble polymers The hair care composition of the present invention may contain a water-soluble polymer. If the overall concentration of the lamellar gel phase is low, a hydrophobic modified polymer may be used to adjust the viscosity of the composition. The hydrophobic modified water-soluble polymer may have, but is not limited to, a naturally derived backbone such as cellulose, starch, guar, gellan, or a combination thereof. Here, a naturally derived backbone may mean a polymer that is water-soluble and biodegradable. The water-soluble polymer may have a cationic charge. In some embodiments, the water-soluble polymer may be polyquaternium-10 such as UCARE Extreme Polymer supplied by Dow Inc., or cetyl hydroxyethylcellulose such as Polysurf 67 CS or Natrosol 330 PLUS CS supplied together by Ashland. A polymer may be used that can help restore the hydrophobicity of the hair surface due to the higher hydrophobicity of the polymer itself.

[0045] The composition of the present invention may contain about 0.1% to about 1.5%, preferably 0.2% to 1.0%, of a water-soluble polymer.

[0046] acid The hair care composition of the present invention may contain an acid. The acid may be used to control the pH of the composition to a desired range (3.5 to 6), otherwise the pH may be higher than 7 due to the presence of tertiary amine surfactants and piroctone olamine.

[0047] The acid may be pre-paired with the surfactant body to form a quaternary ammonium salt or tertiary amine salt, and is supplied by the surfactant supplier.

[0048] When SAPDMA is used as a surfactant, an acid can be selected to protonate the surfactant and convert it into a cationic surfactant. In some embodiments, the acid may be an α-hydroxy acid (AHA), a β-hydroxy acid (BHA), or a polyhydroxy acid (PHA). The BHA may be salicylic acid, which reduces or eliminates the need to add preservatives. In some embodiments, the acid may be lactic acid and glycolic acid (both α-hydroxy acids) instead of salicylic acid. The polyhydroxy acid used may be lactobionic acid or gluconolactone. Other acids that may be used include glutamic acid or aspartic acid, which have a net charge of -1 as their dominant species at the final pH of the composition, but are likely to require preservatives in the composition. Acids to avoid are polyhydric acids such as maleic acid, oxalic acid, citric acid, EDTA, malic acid, and tartaric acid, as the resulting compositions are generally not translucent, and therefore the compositions of the present invention do not need to contain these substances. In some embodiments, a combination or mixture of acids may be used.

[0049] The ratio of acid to the total of the cationic surfactant and anti-dandruff active substance may be approximately 0.4 to 1.12 (weight / weight) (1.0 to 2.0 (moles / moles)). Lower ratios typically result in the presence of crystals, while higher ratios may result in a pH that is too low.

[0050] The composition does not need to contain substantially any acid other than the acid that protonates the cationic surfactant itself.

[0051] Generally, the concentration or amount of acid in a composition is determined by the molar-to-molar ratio parameter. However, for salicylic acid, for example, its amount may be about 0.2% to about 3.6% by weight of the composition, or about 0.25% to about 3.3% by weight, or about 0.25% to about 1.3% by weight.

[0052] air freshener The compositions of the present invention may comprise a fragrance or a combination of fragrances. Some fragrances may comprise multiple fragrance components. In particular, a fragrance may comprise hinokitiol, phenoxyethanol, and L-menthol. The composition may comprise fragrances in concentrations not high enough for any of the substances to act as preservatives of the composition, but only in concentrations necessary to design the desired fragrance properties and strength.

[0053] Additional ingredients The compositions of the present invention may also contain other additional components, which can be selected by those skilled in the art depending on the desired properties of the final product, and which are suitable for making the composition more aesthetically pleasing or aesthetically pleasing, or for giving the composition further advantages in use. Such additional components are generally used individually at concentrations of about 0.001% to about 10% by weight, preferably up to about 5% by weight, of the composition.

[0054] A wide variety of other additional components can be incorporated into the composition of the present invention. These include other conditioning agents (e.g., hydrolyzed collagen under the trademark name "Peptein 2000" available from Hormel, vitamin E under the trademark name "Emix-d" available from Eisai, panthenol available from Roche, pantothenyl ethyl ether available from Roche, hydrolyzed keratin, proteins, plant extracts, and nutrients), preservatives (e.g., benzyl alcohol, methylparaben, propylparaben, and imidazolidinyl urea); pH adjusters (e.g., citric acid, sodium citrate, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate); salts in general (e.g., potassium acetate and sodium chloride); colorants (e.g., either FD&C or D&C dyes); fragrances; and metal ion chelating agents (e.g., disodium ethylenediaminetetraacetate); as well as ultraviolet and infrared screening and absorbing agents (e.g., octyl salicylate).

[0055] In some embodiments, the compositions of the present invention may be preservative-free. In some embodiments, the compositions of the present invention may be preservative compounds such as phenoxyethanol, benzyl alcohol, methylparaben, ethylparaben, and / or propylparaben. Phenoxyethanol may be used as a fragrance at a concentration of up to 0.1% by weight of the composition, but may not be used as a preservative, in which case it may be at a concentration of at least 0.25% by weight of the composition.

[0056] In some embodiments, the composition may not contain a liquid oily compound having AlogP ≥ 5.5.

[0057] Product form The compositions of the present invention may be in the form of rinse-off or leave-on products, and can be formulated in a wide variety of product forms, including but not limited to creams, gels, emulsions, mousses, and sprays.

[0058] The conditioning composition of the present invention is particularly suitable for rinse-off hair conditioners. Such compositions are preferably, (i) After shampooing the hair, apply to the hair an amount of a conditioning composition effective for conditioning the hair, and (ii) It is then used in the step of rinsing the hair.

[0059] translucency The hair care composition of the present invention may be translucent. Whether or not the composition is translucent is determined by the following light transmittance test. The composition of the present invention may have a light transmittance percentage of more than about 10% measured at 600 nm, and in some embodiments, more than at least 2%. The translucency of the composition may be a matter of consumer preference and may motivate application to the scalp to provide an anti-dandruff effect.

[0060] The compositions of the present invention may have a viscosity of about 1 Pa·s to about 500 Pa·s, preferably about 10 Pa·s to about 100 Pa·s. Compositions with lower viscosity are more likely to be applied to the scalp by consumers and therefore more likely to provide an anti-dandruff effect. [Examples]

[0061] The following embodiments further illustrate and demonstrate embodiments within the scope of the present invention. These embodiments are provided for illustrative purposes only and many modifications thereto are possible without departing from the spirit and scope of the invention, and should not be construed as limiting the invention. Where applicable, components are identified by their chemical name or CTFA name; otherwise, they are defined below.

[0062] Table 1 below shows Examples 1 to 7 of the present invention.

[0063] [Table 1]

[0064] Table 2 shows the comparative examples. Comparative Examples 1, 4, and 5 do not have a water-soluble polymer with a naturally occurring skeleton selected from the group consisting of cellulose, starch, guar, and gellan. Comparative Example 3 also does not have a water-soluble polymer. As can be seen, all comparative examples are outside the range of one or more of the following: pH of approximately 3.5 to approximately 6.0, translucency, and viscosity of approximately 10 Pa·s to approximately 100 Pa·s.

[0065] [Table 2] 1) Polysurf 67 CS obtained from Ashland 2) Natrosol PLUS 330 CS obtained from Ashland 3) UCARE Extreme Polymer obtained from Dow Inc. 4) Cosmedia Ultragel 300 obtained from BASF

[0066] Test method process Dissolve the water-soluble polymer in water. Heat the polymer solution to 77°C. Add the cationic surfactant, aliphatic alcohol, 2-pyridinol-N-oxide substance, and acid, and mix until a homogeneous emulsion is formed. Cool the mixture to approximately 35°C while stirring. Add the fragrance and mix. The equipment may be any type of tank and agitator available on the market.

[0067] phase stability The samples were stored in glass jars at room temperature. Visible phase separation was recorded after one month. The same samples were observed using a microscope equipped with a cross-polarizer filter for the presence of piroctone olamine crystals. S = stable, U = unstable.

[0068] viscosity Viscosity is measured using the shear rate gradient method with a rheometer available from TA Instruments under the model name DHR-2. The geometry is a conical plate with a diameter of 40 mm and a conical angle of 2 degrees, with a predetermined gap due to a specific cone (typically 50 μm). The shear rate is 0.1 to 1100 s per minute. -1 The temperature is increased logarithmically, and maintained at 26.7°C. Shear rate = 0.2s -1 Read the viscosity.

[0069] light transmittance The light transmittance of the sample is measured within one day of sample preparation. The light transmittance (%) at a wavelength of 600 nm for a sample with a path length of 1 cm is measured using an xRite Ci7800 spectrophotometer. Some results are not quantitative but are indicated as translucent (Tr) or opaque (Op).

[0070] Microbial susceptibility testing (MST) Two separate pools of challenge organisms—a bacterial pool containing Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Cepacia bacilli, Klebsiella pneumoniae, Enterobacter gergobies, and Reticulata; and a yeast and mold pool containing Candida albicans and Aspergillus brasiliensis—were added to diluted products to simulate potential consumer contamination. The microbial challenge concentrations in the diluted products from each pool were 10 5 ~10 7 The value is CFU / g. Subsequently, the microbial content of the inoculated product was assessed at multiple time points over the next four weeks using microbiological plate counting. Serial dilution and preservative neutralization were performed using nutrient substrates prior to plate culture. The product was considered to have passed MST if the following success criteria were met.

[0071] [Table 3]

[0072] Examples / Combinations A. A translucent hair care composition comprising: a) a substituted 2-pyridinol-N-oxide substance; b) a cationic surfactant having a melting point higher than 40°C; c) an aliphatic alcohol having a melting point higher than 40°C; d) a water-soluble polymer having a naturally derived skeleton selected from the group consisting of cellulose, starch, guar, and gellan; e) water; and f) a monocarboxylic acid, wherein the composition has a pH of about 3.5 to about 6.0, a light transmittance percentage of more than 10% measured at 600 nm, and a viscosity of about 10 Pa·s to about 100 Pa·s. B. The composition according to paragraph A, wherein the acid is selected from the group consisting of α-hydroxy acids (AHA), β-hydroxy acids (BHA), polyhydroxy acids (PHA), and amino acids. C. The composition according to either paragraph A or B, wherein the acid is BHA and salicylic acid. D. The composition according to paragraph B, wherein the acid is an AHA, selected from the group consisting of lactic acid and glycolic acid. E. The composition according to paragraph B, wherein the acid is PHA, and is lactobionic acid or glucolactone. F. A composition according to any one of paragraphs A to E, wherein the composition does not contain a dicarboxylic acid or a polycarboxylic acid. G. The composition according to paragraph B, wherein the molar ratio of acid to the total of the cationic surfactant and anti-dandruff active substance is 1.0 to 2.0. H. The composition according to any one of paragraphs A to G, wherein the molar ratio of the cationic surfactant to the anti-dandruff active substance is 2.5 to 4.5. I. The composition according to any one of paragraphs A to H, wherein the molar ratio of the cationic surfactant to the anti-dandruff active substance is 3.0 to 4.0. J. A composition according to any one of paragraphs A to I, wherein the composition does not contain silicone. K. A composition according to any one of paragraphs A to J, wherein the water-soluble polymer has a cationic charge. L. The composition according to any one of paragraphs A to K, wherein the water-soluble polymer is polyquaternium-10 or cetyl hydroxyethylcellulose. The composition according to any one of paragraphs A to L, further comprising a fragrance containing M. hinokitiol, phenoxyethanol, and L-menthol. N. The composition according to paragraph M, wherein the composition comprises 0.01 to 0.1 by weight of hinokitiol, 0.01 to 0.1 by weight of phenoxyethanol, and 0.01 to 0.2 by weight of L-menthol. O. The composition according to any one of paragraphs A to N, further comprising a nonionic surfactant. P. A composition according to any one of paragraphs A to O, wherein the composition is substantially free of preservatives. Q. The composition according to any one of paragraphs A to P, wherein the composition substantially does not contain a liquid oily compound having an AlogP of greater than 5.5. The composition according to any one of paragraphs A to Q, wherein the cationic surfactant is stearamidopropyldimethylamine. S. A hair care composition comprising a) a substituted 2-pyridinol-N-oxide substance, b) a cationic surfactant having a melting point higher than 40°C, c) an aliphatic alcohol having a melting point higher than 40°C, d) a water-soluble polymer, e) water, and f) a monocarboxylic acid, wherein the composition is free from silicones, sulfates, acrylates, and preservatives. T. A translucent hair care composition comprising a) a substituted 2-pyridinol-N-oxide substance, b) a cationic surfactant having a melting point higher than 40°C, c) an aliphatic alcohol having a melting point higher than 40°C, d) a water-soluble polymer, e) water, and f) one of glutamic acid or aspartic acid, wherein the composition has a pH of about 3.5 to about 6.0, a light transmittance percentage of more than 10% measured at 600 nm, and a viscosity of about 10 Pa·s to about 100 Pa·s.

[0073] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise indicated, each such dimension is intended to mean both the listed value and the functionally equivalent range encompassing that value. For example, a dimension disclosed as "40 mm" is intended to mean "approximately 40 mm."

[0074] All documents referenced herein, including any patents or patent applications that are cross-referenced or related, and any patent applications or patents on which this application claims priority or benefit thereof, are incorporated herein by reference in their entirety unless explicitly stated to be excluded or limited. No reference to any document shall be deemed prior art to any invention disclosed or claimed herein, nor shall it be deemed to teach, suggest or disclose any such invention, either alone or in combination with any other reference. Furthermore, if any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in any document incorporated by reference, the meaning or definition given to the term in this document shall prevail.

[0075] While specific embodiments of the present invention have been illustrated and described, it will be apparent 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. Therefore, it is intended that all such changes and modifications within the scope of the invention be covered in the appended claims.

Claims

1. A translucent hair care composition, a) Substituted 2-pyridinol-N-oxide substance and b) A cationic surfactant having a melting point higher than 40°C, c) Aliphatic alcohols having a melting point higher than 40°C, d) A water-soluble polymer having a naturally occurring skeleton selected from the group consisting of cellulose, starch, guar, and gellan, and being polyquaternium-10 or cetyl hydroxyethylcellulose, e) Water and, f) Contains salicylic acid, The composition has a pH of 3.5 to 6.

0. The composition has a light transmittance percentage of more than 10% measured at 600 nm, The viscosity is between 10 Pa·s and 100 Pa·s. A composition that does not contain silicone.

2. The composition according to claim 1, wherein the composition does not contain a dicarboxylic acid or a polycarboxylic acid.

3. The composition according to claim 1, wherein the molar ratio of the salicylic acid to the total of the cationic surfactant and the substituted 2-pyridinol-N-oxide substance is 1.0 to 2.

0.

4. The composition according to claim 1, wherein the molar ratio of the cationic surfactant to the substituted 2-pyridinol-N-oxide substance is 2.5 to 4.

5.

5. The composition according to claim 1, wherein the composition further comprises 0.01 to 0.1 by weight of hinokitiol, 0.01 to 0.1 by weight of phenoxyethanol, and 0.01 to 0.2 by weight of L-menthol.

6. The composition according to claim 1, further comprising a nonionic surfactant.

7. The composition according to claim 1, wherein the composition substantially does not contain a preservative.

8. The composition according to claim 1, wherein the cationic surfactant is stearamidopropyldimethylamine.

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