Dilutable sulfate-free compact personal cleansing composition

Abstract

A stable, compact, low-viscosity personal care composition containing 20-40% total surfactants and no sulfated surfactants. The total surfactants include at least 50% anionic surfactants and 10%-40% amphoteric surfactants. The anionic and amphoteric surfactants are present in a ratio that provides the personal care composition with a compact viscosity of less than 2000 MPa·s and a diluted viscosity of greater than 2000 MPa·s. The personal care composition may optionally contain an electrolyte viscosity modifier to adjust viscosity. The compact personal care composition is formulated to allow convenient dilution by the user and to provide a desirable cleaning experience upon dilution.

Description

[Technical Field]

[0001] The present disclosure generally relates to a concentrated low-viscosity personal cleansing composition that converts to a high-viscosity composition when diluted to a lower concentration. More specifically, the present disclosure relates to a concentrated low-viscosity personal cleansing composition comprising a sulfate-free anionic surfactant and an amphoteric surfactant, which is adjusted to provide an appropriately high viscosity when the concentrated composition is diluted with water by a user. [Background technology]

[0002] Personal cleansing compositions, such as shampoo and body wash, are common household products used by many consumers.Such compositions are generally sold as liquids or gels, stored in plastic bottles or tubes, which are configured to dispense the compositions conveniently.However, the negative environmental impact of plastic packaging continues to be a cause of concern for environmentally conscious consumers and businesses.Therefore, some manufacturers turn to selling concentrated products (i.e., products that contain less water) in order to reduce the amount of plastic packaging used in products.

[0003] While producing and selling products in concentrated form may seem like a good way to reduce the amount of plastic packaging, at least some consumers dislike using concentrated products directly on the body, perceiving them as "too harsh." While these consumers prefer to dilute the product at home (i.e., by adding water to the concentrate and mixing), concentrated products are often too thick to be diluted uniformly, which can result in poor product aesthetics (e.g., a cloudy appearance), and the viscosity of the diluted concentrated product is too thin to be easily applied to the body. Thus, there remains a need for concentrated personal cleansing compositions that are convenient to dilute (e.g., pourable) and use, and that provide desirable in-use properties (e.g., uniformity, foaming, cleansing, thickness) to promote plastic waste reduction.

[0004] U.S. Patent Application Publication No. 20210220243 discloses pourable concentrated surfactant compositions having a lamellar phase that thickens and transforms into an isotropic phase upon dilution. According to U.S. Patent Application Publication No. 20210220243, the compositions can be used in small amounts as concentrates and diluted at the time of use, or diluted with water in refill packaging to reduce plastic waste. These compositions use acyl isethionate-based fatty acids to create a lamellar phase that maintains its viscosity upon dilution. However, the use of fatty acids has drawbacks. For example, fatty acids can form soap scum during rinsing, especially in hard water, resulting in poor consumer performance. Furthermore, the shear-thinning properties of the lamellar phase can make it more difficult for users to dilute the concentrated compositions compared to concentrated compositions that are only moderately shear-thinning or exhibit near-Newtonian behavior. In fact, most users desire thick, rich compositions rather than thin, runny compositions.

[0005] In another example, US Patent No. 11,129,783 discloses a low-viscosity, stable concentrated hair care composition that can be delivered to hair in various forms, such as foam.However, not all consumers prefer foaming compositions, and when the concentrated composition of US Patent No. 11,129,783 is diluted and applied as a conventional shampoo, the resulting composition does not have the desired thickness.

[0006] Conventional personal care compositions, such as shampoos and body washes, typically use sulfated surfactants to provide cleansing benefits to skin and / or hair. However, there is a general perception among some consumers that sulfated surfactants are harsh on skin and hair. Therefore, it is desirable to formulate dilutable concentrates that are substantially free of sulfated surfactants.

[0007] However, sulfate-free compositions present formulation challenges. For example, sulfate-free surfactant systems can be difficult to thicken without the use of polymeric thickeners or agents that promote the formation of lamellar phases. However, none of these approaches are suitable for formulating dilutable sulfate-free concentrates. Specifically, formulating with an appropriate amount of polymeric thickener to provide a diluted composition with a desired viscosity generally results in a concentrated composition that is too thick to process. Additionally, agents that promote the formation of lamellar phases result in non-Newtonian (shear-thinning) compositions that are much more difficult to dilute than micellar or isotropic compositions, which are near-Newtonian.

[0008] Another drawback of non-sulfuric acid surfactants is their high cost compared with sulfated surfactants.In the class of non-sulfuric acid surfactants, alkyl olefin sulfonates may be preferred due to their high cleaning performance, wide availability, and low cost compared with other non-sulfuric acid surfactants.However, using more than 20% alkyl olefin sulfonates generally results in a compact composition that is too viscous to be conveniently processed (for example, too thick for users to conveniently pour).In addition, as disclosed in JP 2021523172(A), for example, it is generally accepted in the art that the combination of alkyl olefin sulfonate surfactants and certain amphoteric surfactants (for example, cocamidopropyl betaine) does not build sufficient viscosity. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] U.S. Patent Application Publication No. 20210220243 [Patent Document 2] U.S. Patent No. 11,129,783 [Patent Document 3] Patent Publication No. 2021523172(A) Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, it would be desirable to provide a low viscosity, sulfate-free, compact personal cleansing composition that can be diluted by the user to provide a thicker, diluted personal care composition. It would also be desirable to provide a low viscosity, concentrated personal care composition that does not require an external viscosity modifier to provide a thicker, diluted composition. [Means for solving the problem]

[0011] An aqueous personal care composition comprising at least 20% total surfactants, wherein greater than 50% of the total surfactants are anionic alkyl olefin sulfonate surfactants and 10% to 40% are amphoteric surfactants. The personal care composition has a compact viscosity of less than 2000 MPa·s and a dilution viscosity of greater than 2000 MPa·s according to the Viscosity Method. The personal care composition is substantially free of sulfated surfactants. DETAILED DESCRIPTION OF THE INVENTION

[0012] There is a demand for environmentally friendly products that use less plastic. Compact or concentrated personal cleansing compositions contain less water than their pre-diluted counterparts and therefore may require less plastic packaging. However, compact compositions present formulation challenges. For example, compact shampoo formulations may exhibit a relatively clear boundary regarding the amount of surfactant that can be added before the viscosity becomes too thick for processing. Compact personal care compositions must be thin enough for processing, yet thick enough to provide a desirable in-use cleaning experience when diluted. Furthermore, formulation problems must be solved without increasing product cost and complexity. Conventional pre-diluted personal care compositions become thin when diluted with water, and therefore do not provide any guidance to help solve the aforementioned formulation problems.

[0013] Surprisingly, it has now been discovered that a specific combination of alkyl olefin sulfonate ("AOS") with an amphoteric surfactant and, optionally, an electrolyte, can help solve the aforementioned problems. It has also been discovered that higher concentrations of AOS can be used in compact compositions than previously thought feasible. As a further unexpected advantage, the compositions herein do not require hydrotropes, fatty acids, or water-miscible solvents to provide the desired viscosity. This is beneficial because these types of materials are expensive, can result in undesirable performance (e.g., soap scum formation), and can reduce the composition's ability to thicken upon dilution.

[0014] References herein to "an embodiment" or the like mean that a particular material, feature, structure, and / or characteristic described in connection with that embodiment is included in at least one embodiment, and optionally in multiple embodiments, but do not mean that all embodiments incorporate the described material, feature, structure, and / or characteristic. Furthermore, materials, features, structures, and / or characteristics may be combined in any suitable manner across different embodiments, and materials, features, structures, and / or characteristics may be excluded or substituted from those described. Accordingly, the embodiments and aspects described herein can include or be combined with elements or components of other embodiments and / or aspects, even if not explicitly illustrated in combination, unless specifically stated otherwise or unless stated to be incompatible.

[0015] All ingredient percentages described herein are by weight of the cosmetic composition and may be expressed as "weight percent (wt%)" unless otherwise specified. All ratios are by weight unless specifically stated otherwise. Significant figures do not represent limitations on the indicated amounts or on the precision of the measurements. Unless specifically stated otherwise, all numerical quantities are understood to be modified by the word "about." Unless otherwise indicated, all measurements were understood to be made at about 25°C and ambient conditions, where "ambient conditions" means conditions under about 1 atmosphere and about 50% relative humidity. All numerical ranges are inclusive of narrower ranges not expressly stated, and the upper and lower limits of stated ranges are interchangeable to create further ranges not expressly stated.

[0016] The compositions of the present invention can comprise, consist essentially of, or consist of the essential and optional components described herein. As used herein, "consisting essentially of" means that the 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. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

[0017] definition "About" modifies a particular value by indicating a range of ±20% or less (eg, ±15% or less, 10% or less, or 5% or less) of the stated value.

[0018] "Apply" or "application" as used in reference to a composition means to spread or spread the composition onto a keratinous surface of a human being, such as skin or hair.

[0019] "Charge Density" ("CD") refers to the ratio of positive charges on a polymer to the molecular weight of the polymer.

[0020] "Compact composition" means a composition containing more than 20% surfactant.

[0021] "Compact viscosity" means the viscosity of the compact compositions described herein.

[0022] "Cosmetic agent" means any substance, and any component thereof, intended to be rubbed, poured, sprinkled, sprayed, introduced, or otherwise applied to the mammalian body or any part thereof to produce a cosmetic effect. Cosmetic agents may include substances and food additives that are generally recognized as safe (GRAS) by the U.S. Food and Drug Administration.

[0023] "Diluted composition" means a compact composition that has been diluted with at least 1 part water for every 2 parts compact composition (ie, to less than two-thirds the surfactant concentration of the compact composition).

[0024] "Dilution viscosity" means the viscosity of a diluted composition described herein.

[0025] "Personal cleansing composition" refers to a personal care composition or product intended for use in cleansing bodily surfaces such as skin or hair. Some non-limiting examples of cleansing compositions are shampoos, conditioners, conditioning shampoos, shower gels, liquid hand cleansers, facial washes, etc.

[0026] "Suitable for application to human hair" means that the personal care composition or its components are acceptable for use in contact with human hair and scalp and skin without undue toxicity, incompatibility, instability, allergic reaction, etc.

[0027] By "substantially free," it is meant that the composition or component contains less than 3% (e.g., less than 2%, less than 1%, or even less than 0.5%) of the subject material by weight of the composition or component. By "free," it is meant that the composition or component contains 0% of the subject material.

[0028] "Sulfate-free surfactant" means a surfactant that lacks a sulfate moiety.

[0029] Personal Care Compositions The personal care compositions herein are provided in the form of compact compositions intended to be diluted with water by the user before use. The compact personal care compositions have a low viscosity, allowing the user to easily pour the compact composition into a container for dilution. The compact composition comprises a surfactant system, an aqueous carrier (e.g., water), and optionally an electrolyte viscosity modifier. The surfactant system utilizes a specific combination of anionic and amphoteric surfactants to help provide the desired composition viscosity. The viscosity of the compact and diluted compositions can be adjusted by adding a specific amount of the electrolyte viscosity modifier. The personal care compositions can be manufactured using conventional methods for producing the desired type of composition (e.g., shampoo or body wash).

[0030] The diluted personal care compositions can be used to cleanse and / or condition hair or other bodily surfaces, such as skin. The personal care compositions can be provided in the form of, for example, liquid soap, body wash, shampoo, or conditioner. The personal care compositions herein can be formulated as cosmetic compositions, cosmeceutical compositions, or pharmaceutical (therapeutic) compositions, and can be leave-on or rinse-off compositions.

[0031] In some embodiments, the compact composition may be diluted with water at a composition-to-water ratio of 3:1 to 1:4 (e.g., 2:1, 1:1, 1:2, or 1:3) to provide a 25% to 80% diluted composition. It may be desirable to formulate the compact composition so that the resulting diluted composition has a total surfactant concentration in the range of 12% to 15% (e.g., 13%). Without being limited by theory, it is believed that this range provides an excellent balance between the flowability (i.e., compact viscosity) of the compact composition and the cleaning performance of the diluted composition. Of course, it should be understood that the amount of water used to dilute the compact composition is not particularly limited and can be adjusted by the user as needed to provide a diluted composition with performance or aesthetic properties suited to the user.

[0032] At least some consumers prefer to use personal care compositions such as clear shampoos or body washes. Accordingly, the compact personal care compositions herein may be formulated to become more transparent upon dilution with water. In some embodiments, the clarity of the diluted personal care composition may be selected to signal to the user that an appropriate amount of water has been added to achieve the intended dilution. For example, the compact composition may have a percent transmittance (%T) of less than 50% (e.g., less than 40%, less than 30%, less than 20%, less than 10%, or even less than 5%). %T is a measure of the clarity of the composition and can be determined according to the Clarity Method, described in more detail below. When the compact composition is diluted with an appropriate amount of water (e.g., 25% to 80% dilution), the resulting diluted composition may have a %T of 80% or greater (e.g., greater than 85%, or greater than 90%, or even greater than 95%) as measured according to the Clarity Method.

[0033] In some embodiments, a label or other indicia can be placed on a container intended for storing the diluted composition, which can be, for example, a clear plastic or glass bottle. The label can be configured so that it is not clearly visible through the compact composition until the compact composition has been diluted by a predetermined amount (e.g., 3:1 to 1:4). Once the predetermined dilution is reached, the label or indicia can be clearly seen or read. Additionally or alternatively, a user can place an object (e.g., a piece of paper, card, or picture) on the back of the package containing the diluted composition, and once the compact composition has been diluted as intended, the object can be clearly seen through the container.

[0034] The personal care compositions herein may optionally contain one or more additional ingredients commonly found in compositions of the type described, provided that the optional ingredients do not interfere with the stability or effectiveness of the composition. Some non-limiting examples of optional additional ingredients include preservatives, fragrances or fragrances, cationic polymers, colorants or dyes, conditioning agents, hair bleaches or colorants, moisturizers, foam boosters, emollients, moisturizers, pharmaceutical actives, vitamins or nutrients, sunscreens, sensates, botanical extracts, nutrients, astringents, cosmetic particles, absorbent particles, adhesive particles, hair fixatives, fibers, skin lightening agents, skin tanning agents, anti-dandruff agents, exfoliants, enzymes, suspending agents, pH adjusters, anti-acne agents, sunscreens, hair growth or restoration agents, insect repellents, combinations thereof, and the like.

[0035] The viscosity of the compact composition should be low enough to allow the user to conveniently pour and dilute it, yet high enough to provide a desirable cleaning experience. "Low viscosity" means less than 2000 MPa·s (e.g., less than 1500 MPa·s, less than 1,000 MPa·s, less than 500 MPa·s, or even less than 300 MPa·s), and "high viscosity" means greater than 2000 MPa·s (e.g., greater than 2500 MPa·s, greater than 3000 MPa·s, greater than 5000 MPa·s, greater than 10,000 MPa·s, or even greater than 20,000 MPa·s), but typically less than 50,000 MPa·s. Without being limited by theory, it is believed that these viscosity ranges provide the composition with the desired pourability and cleaning experience.

[0036] The personal care compositions herein are stable after dilution. This is important because consumers generally perceive product instability as a sign of poor product quality. Product instability may manifest as precipitate formation, phase separation, cloudy appearance, and / or a decrease in the optical clarity of the composition. In some embodiments, it may be important to select suitable preservatives and / or counterions to improve product stability. Methods for determining product stability are described in more detail below.

[0037] The personal care composition may have a pH ranging from 2 to 10 (e.g., 3.0 to 7.0, 4 to 6.5, or even 4.5 to 6.0). It may be desirable to select a pH where the composition aids in solubilizing minerals and redox metals already deposited on the hair. Thus, the hair care composition may also be effective in rinsing out existing mineral and redox metal deposits, which may reduce cuticle deformation and reduce cuticle chipping and damage. pH may also be important to the effectiveness of preservatives in the composition.

[0038] surfactants The compact compositions herein comprise 20% to 40% (e.g., 25% to 40% or 30% to 35%) of a surfactant selected from anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof. The type and amount of surfactant present in the compact composition should be selected to provide a composition with good cleaning and foaming properties upon dilution and a compact viscosity of 2000 MPa·s or less. The surfactant amounts disclosed herein refer to "active" amounts and exclude carriers (e.g., water) and excipients typically present in commercial surfactant products. Various examples and descriptions of detersive surfactants that may be suitable for use herein are disclosed in U.S. Pat. No. 8,440,605, U.S. Patent Application Publication Nos. 2009 / 155383, and 2009 / 0221463.

[0039] The personal care compositions herein comprise a sulfate-free anionic surfactant of 12 or more carbons (e.g., 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22). That is, the surfactant molecule has an alkyl tail comprising a carbon chain of at least 12 carbon atoms. In some embodiments, at least 50% by weight (e.g., 50% to 100%, 55% to 95%, 60% to 90%, or even 65% to 80%) of the total surfactant in the compact composition is a sulfate-free anionic surfactant.

[0040] The non-sulfuric acid containing anionic surfactants that may be suitable for use herein generally include branched or linear isethionates, sulfonates, ether sulfonates, sulfosuccinates, sulfoacetates, glycinates, sarcosinates, glutamates, alanines, carboxylates, taurates, phosphate esters, their salts (for example, TEA, DEA, sodium, ammonium, and potassium salts), and combinations thereof.More specific examples of non-sulfuric acid containing surfactants that may be suitable for use herein are disclosed in US Patent Application Publication No. 20190105246.

[0041] In some embodiments, alkyl olefin sulfonates may be particularly suitable anionic surfactants for use herein. Alkyl olefin sulfonates are known compounds, for example, as described in Ullmann's Encyclopedia of Industrial Chemistry or U.S. Patent No. 8,211,850. Alkyl sulfonates have the following general formula:

[0042] [ka] During the ceremony, R=C8-C24 alkyl (linear or branched, saturated or unsaturated), or mixtures thereof; M + = monovalent cation.

[0043] In some embodiments, the alkyl olefin sulfonate may be an α-olefin sulfonate, typically comprising a mixture of an alkene sulfonate (Formula I) and a hydroxyalkyl sulfonate (Formula II). Some non-limiting examples of alkyl olefin sulfonates that may be suitable for use herein include sodium C13-17 alkane sulfonate, sodium C12-14 olefin sulfonate, and sodium C14-16 olefin sulfonate.

[0044] Formula I:

[0045] [ka] In the formula, R=C8-C18 alkyl, and M + = monovalent cation.

[0046] Formula II:

[0047] [ka] In the formula, R=C4 to C18 alkyl, and M + = monovalent cation.

[0048] amphoteric surfactants The surfactant may comprise 5% to 50% (e.g., 10 to 40%, 15 to 35%, or even 20 to 30%) of an amphoteric surfactant, based on the total weight of surfactants in the composition. Some non-limiting examples of amphoteric detersive surfactants that may be suitable for use herein include surfactants broadly described as derivatives of aliphatic secondary and tertiary amines, where the aliphatic radical can be straight 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. Some specific examples of amphoteric detersive surfactants include cocoamphoacetate, cocoamphodiacetate, lauroamphoacetate, lauroamphodiacetate, cocamidopropyl betaine, cocamidopropyl hydroxysultaine, alkanolamides (e.g., cocamide monoisopropanolamide), and mixtures thereof.

[0049] Optional Additional Surfactant The personal care composition may contain an optional additional surfactant to provide desired cleaning and foaming performance. Any optional additional surfactant must be physically and chemically compatible with the other components of the personal care composition described herein and must not unduly impair product stability, aesthetics, or performance. The amount of optional additional surfactant is not particularly limited and may be present in the compact composition at, for example, 5% to 25% (e.g., 8% to 20% or 9% to 15%) based on the total weight of surfactants.

[0050] Viscosity modifier The personal care compositions herein may contain 0.1% to 10% (e.g., 0.5% to 8%, 1% to 5%, or 2% to 4%) of a viscosity modifier. Electrolyte viscosity modifiers may be particularly suitable for use herein because they are generally inexpensive, readily available, and safe to use. When present, the electrolyte viscosity modifier may be selected to work with the amphoteric surfactant to "tune" the viscosity of the compact and diluted compositions. Surprisingly, for a particular combination of linear anionic surfactant and branched anionic surfactant, there exists a specific range of amphoteric surfactant and electrolyte concentrations that results in a desired viscosity profile. For example, the concentration of the electrolyte viscosity modifier in the diluted composition may be selected to result in a high-viscosity surfactant microstructure (e.g., elongated micelles) at 13% surfactant. In this example, formulating to achieve a desired electrolyte concentration of 13% in the diluted composition would mean a significantly higher electrolyte concentration in the concentrate. Therefore, balancing the ingredients and ingredient concentrations in the compact composition to provide the desired viscosity and cleaning properties in the diluted composition can be important, and this can be counterintuitive.

[0051] Some non-limiting examples of electrolyte viscosity modifiers include sodium, ammonium, and potassium salts with appropriate counterions. In some aspects, sodium chloride and ammonium chloride may be particularly suitable.

[0052] In some aspects, the personal care compositions herein are substantially free of, or free of, hydrotropes, water-miscible solvents, fatty acids, fatty alcohols, and / or polymeric thickeners commonly used to adjust the viscosity of conventional compositions, which is desirable because these types of viscosity modifiers tend to be more expensive, exhibit less favorable consumer characteristics, and / or do not provide adequate compact or dilution viscosity.

[0053] Some non-limiting examples of water-miscible solvents include dipropylene glycol, tripropylene glycol, diethylene glycol, ethylene glycol, propylene glycol, glycerin, 1,3-propanediol, 2,2-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, and 2-methyl-2,4-pentanediol.

[0054] Some non-limiting examples of hydrotropes include sodium xylene sulfonate (SXS), sodium cumene sulfonate, sodium toluene sulfonate, and mixtures thereof.

[0055] Some non-limiting examples of fatty acid thickeners include lauric acid and stearic acid.

[0056] Some non-limiting examples of polymeric thickeners include acrylic thickening polymers, such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, crosslinked (meth)acrylic acid homopolymers (e.g., products sold by Goodrich under the names Carbopol 980, 981, 954, 2984, and 5984, or products sold by 3 VSA under the names Synthalen M and Synthalen K), and crosslinked copolymers of (meth)acrylic acid and C1-C6 alkyl acrylates, in particular crosslinked copolymers of methacrylic acid and ethyl acrylate or acrylic acid and ethyl acrylate (e.g., products sold by Coatex under the name Viscoatex 538C, products sold by Röhm & Haas under the name Aculyn 33, or products sold by Noveon under the name Carbopol Aqua SF-i).

[0057] Additional non-limiting examples of viscosity modifiers can be found in U.S. Patent Application Publication No. 20170157008 and U.S. Patent No. 4,741,855.

[0058] Conditioning Agent The personal care compositions herein may optionally include a conditioning agent. Conditioning agents include materials used to impart specific conditioning benefits to hair and / or skin. Conditioning agents useful in the hair care compositions of the present invention typically comprise water-insoluble, water-dispersible, non-volatile liquids that form emulsified liquid particles. The conditioning agent may be present in the compact composition at 0.05% to 20% (e.g., 0.1% to 15%, 0.2% to 10%, 0.3% to 3%, or even 0.5% to 2%). Some non-limiting examples of conditioning agents that may be particularly suitable for use herein include silicones, aminosilicones, and cationic polymers such as cationic starch, cellulose, and guar. Some non-limiting examples of conditioning agents are disclosed in U.S. Patent Application Publication Nos. 20180078476 and 20190105247.

[0059] When personal cleansing compositions contain cationic conditioning polymers, it may be desirable to minimize the amount of inorganic salt in the composition.Inorganic salts may be added to sulfated surfactant-based cleansing formulations to thicken the product.However, high concentrations of inorganic salts in sulfate-free formulations in the presence of cationic conditioning polymers can cause the product to become unstable due to the formation of gel-like surfactant-polymer complexes known as coacervates.By maintaining a low inorganic salt concentration (for example, less than 1%), the instability problem in sulfate-free formulations containing anionic surfactants and high molecular weight cationic polymers can be solved.

[0060] Anti-dandruff The personal care compositions herein may optionally contain an anti-dandruff agent.As can be understood, when the diluted composition is used as intended, the formation of coacervates can facilitate the deposition of the anti-dandruff agent on the scalp.Some non-limiting examples of anti-dandruff agents include azoles (e.g., climbazole, ketoconazole, itraconazole, econazole, and elubiol), hydroxypyridines (e.g., piroctone olamine, ciclopirox, rilopirox, and MEA-hydroxyoctyloxypyridinone), keratolytic agents such as salicylic acid and other hydroxy acids, strobilurins such as azoxystrobin, metal chelators such as 1,10-phenanthroline and hinokitiol, pyridinethione microparticles such as zinc pyrithione, piroctone olamine, sulfur, and combinations thereof.

[0061] opacifier The personal care compositions herein may contain from 0.01% to 5% of an opacifying or pearlizing agent, which is not particularly limited, but should not undesirably affect the clarity (%T) of the diluted composition. Some non-limiting examples of opacifying agents include polystyrene particles and dispersions having particle sizes of 0.05 microns to about 0.45 microns (e.g., EUPERLAN® 810 or LYTRON® 621 and 631), styrene PVP copolymers, titanium dioxide, mica, long chain (C16-C22) acyl derivatives such as glycol or polyethylene glycol esters of fatty acids having 16 to 22 carbon atoms and up to 7 ethyleneoxy units (e.g., TEGO-PEARL®), alkanolamides of fatty acids having from about 16 to about 22 carbon atoms, preferably about 16 to 18 carbon atoms, such as stearic acid monoethanolamide, stearic acid diethanolamide, stearic acid monoisopropanolamide, and stearic acid monoethanolamide, alkyl (C16-C22) dimethylamine oxides such as stearyl dimethylamine oxide, and combinations thereof.

[0062] kit The compact personal care compositions herein may be sold as part of a kit including a primary container for housing the compact composition and a secondary container suitable for receiving and storing at least a portion of the compact composition for dilution. The configuration of the containers is not particularly limited. The containers may be the same size or different sizes, may be made of the same material or different materials, and may be disposable or reusable (e.g., clear plastic or glass). The first and second containers may be configured in various ways to facilitate use of the product. For example, the first and / or second containers may include markings or indicia to indicate the appropriate concentration of the personal care composition for dilution and / or use.

[0063] Of course, it should be understood that the compact composition may also be sold as a stand-alone product.

[0064] How to use The compact personal care compositions herein are intended to be diluted before use. In some embodiments, to prepare the diluted composition for use, a portion of the compact composition contained in the primary container (e.g., 10%, 20%, 25%, 33%, or 50%) is poured into a secondary container of sufficient size to hold the entire diluted composition. Water is added to the second container to dilute the compact composition to the appropriate amount (e.g., 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, or even 10:1 dilution). It may be desirable to dilute the compact composition so that the diluted composition contains 13% total surfactant. Of course, it should be understood that the compact composition can be diluted to a greater or lesser extent as desired, for example, to adjust the viscosity or cleaning power of the diluted composition to personal preference. After adding the appropriate amount of water to the compact composition, the mixture is shaken by hand until the diluted composition appears homogeneous. In some embodiments, the mixture is shaken for at least 5 seconds (eg, 10, 20, 30, 45, or even 60 seconds or more).

[0065] Upon dilution of the compact composition, the diluted composition can be used in conventional cleansing and / or conditioning methods for hair and / or skin. An effective amount of the diluted composition for use generally ranges from 1 g to 50 g (e.g., 1 g to about 20 g). A method for cleansing hair or skin can include applying the personal care composition to the hair or skin. For example, an effective amount of the personal care composition can be applied to hair or skin that has been wetted with water, and the composition can then be rinsed off. Application to hair typically involves working the composition through the hair so that most or all of the hair comes into contact with the composition. In some embodiments, a method for treating hair or skin can include the steps of: (a) wetting the hair or skin with water; (b) applying an effective amount of the personal care composition to the hair or skin; and (c) rinsing the applied area of ​​the skin or hair with water. These steps can be repeated as many times as desired to achieve the desired cleansing and conditioning benefits.

[0066] method Viscosity method. This method can be used to determine the dynamic viscosity of the compact and diluted personal care compositions herein. Viscosity is measured using a Brookfield Rheometer R / S Plus™ brand cone and plate controlled stress rheometer (or equivalent) according to the manufacturer's instructions. The cone (Spindle C-75-1) has a diameter of 75 mm and an angle of 1°. Viscosity is measured at a constant shear rate of 2 s -1 and temperature 26.5° C. using a steady-state flow experiment. The sample size is 2.5 mL and the total measurement read time is 3 minutes.

[0067] Transparency method (%T). This method can be used to determine the clarity of the compact and diluted personal care compositions herein. The method uses a spectrophotometer (e.g., a SpectraMax M-5 or equivalent available from Molecular Devices) to measure the percentage of light transmitted through a sample (%T). A higher %T value indicates a more transparent composition. To determine %T, samples are prepared in an appropriate container (e.g., a 96-well, visible, flat-bottom plate such as Greiner part number 655-001) and ensure that there are no air bubbles in the sample. The flat-bottom plate is placed in the spectrophotometer, and %T is measured at 600 nm using suitable software (e.g., SpectraMax M-5 software available from Molecular Devices). [Example]

[0068] Example 1: Shampoo Formulation Table 1 shows thirteen examples of compact personal care compositions of the present invention described herein, as well as a comparative example (Comparative Example C1) of a non-inventive composition. C1 illustrates a conventional formulation using a relatively high concentration of hydrotrope (i.e., 4% dipropylene glycol) to reduce the viscosity of the compact composition. The compositions are made in 100-gram to 400-gram batches by combining the ingredients in a laboratory mixer at ambient temperature and mixing for several minutes. Dilution is accomplished by pouring approximately 60 g of the concentrated composition into an 8-ounce glass jar, adding the appropriate amount of water to achieve a final surfactant concentration of 13%, screwing the jar lid on, and then shaking the closed jar by hand for approximately 5-10 seconds.

[0069] [Table 1]

[0070] [Table 2] 1 Bio-Terge® AS-40 available from Stepan Company

[0071] Example 2: Comparative composition, not of the present invention Table 2 shows examples of comparative compositions from U.S. Patent No. 11,129,783 that do not exhibit suitable viscosities. Selected examples from U.S. Patent No. 11,129,783 were reproduced and diluted to 13% total surfactant. Example C13 was modified to remove dipropylene glycol, a water-miscible thickener, and Example C20 was modified to remove sodium xylene sulfonate, a hydrotropic thickener. Reported values ​​are those listed in the patent. Measurements were determined according to the viscosity method. As can be seen in Table 2, these modifications did not result in suitable diluted compositions.

[0072] [Table 3]

[0073] [Table 4]

[0074] Examples / Combinations 1. A compact personal care composition comprising: a. at least 20% by weight of the composition of a surfactant, i. greater than about 50% by weight of an anionic alkyl olefin sulfonate surfactant, based on the weight of the surfactant; ii. a surfactant, comprising about 10% to about 40% by weight of the surfactant of an amphoteric surfactant; b. water, The composition has a compact viscosity of less than about 2000 MPa·s and a dilute viscosity of greater than about 2000 MPa·s according to the Viscosity Method, and the composition is substantially free of sulfated surfactants.

[0075] 2. The composition of paragraph 1, wherein the alkyl olefin sulfonate surfactant is an α-olefin sulfonate surfactant.

[0076] 3. The composition of paragraph 2, wherein the α-olefin sulfonate surfactant is selected from the group consisting of sodium C12-14 olefin sulfonate, sodium C14-16 olefin sulfonate, and combinations thereof.

[0077] 4. The composition of any one of paragraphs 1-3, wherein the composition comprises greater than 20%, preferably greater than 22%, preferably greater than 25%, and more preferably greater than 27% alkyl olefin sulfonate surfactant, based on the weight of the composition.

[0078] 5. The composition of any one of paragraphs 1 to 4, wherein the amphoteric surfactant is selected from the group consisting of betaine, lauroamphoacetate, alkanolamide, and combinations thereof.

[0079] 6. The composition of any one of paragraphs 1 to 5, further comprising a conditioning agent.

[0080] 7. The composition of paragraph 6, wherein the conditioning agent is a cationic conditioning polymer.

[0081] 8. The composition of paragraph 6 or 7, wherein the cationic conditioning polymer has a weight average molecular weight of about 50 kDa to about 2 MDa and a charge density of about 1 meq / g to about 2.5 meq / g.

[0082] 9. The composition of any one of paragraphs 1 to 8, further comprising an electrolyte viscosity modifier.

[0083] 10. The composition of paragraph 9, wherein the electrolyte viscosity modifier is selected from sodium chloride, ammonium chloride, and combinations thereof.

[0084] 11. The composition of any one of paragraphs 1-10, further comprising an anti-dandruff agent selected from the group consisting of azole, hydroxylpyridone, zinc pyrithione, piroctone, piroctone olamine, sulfur, ciclopirox, rilopirox, MEA-hydroxyoctyloxypyridinone, salicylic acid, azoxystrobin, and 1,10-phenanthroline.

[0085] 12. The composition of any one of paragraphs 1-11, wherein the composition comprises less than 3%, preferably less than 2%, more preferably less than 1%, and most preferably less than 0.5% of a viscosity modifier selected from the group consisting of hydrotropes, water-miscible solvents, fatty acids, fatty alcohols, and polymers.

[0086] 13. The composition of claim 12, wherein the composition does not include a viscosity modifier selected from the group consisting of hydrotropes, water-miscible solvents, fatty acids, and acrylic polymers.

[0087] 14. The composition of any one of paragraphs 1-13, wherein the compact composition has a %T of less than about 50 according to the Clarity Method.

[0088] 15. The composition of any one of paragraphs 1 to 14, further comprising an opacifying agent.

[0089] 16. A method for making a diluted personal cleansing composition, comprising: a. adding an amount of the compact personal cleaning composition of any one of paragraphs 1-15 to a container; b. adding water to the container to form a diluted personal care composition, wherein the amount of water added provides a composition to water ratio of 3:1 to 1:4, preferably 2:1 to 1:4, and more preferably 1:1 to 1:4.

[0090] 17. The method of paragraph 16, wherein the diluted composition has a %T of greater than about 75 according to the Clarity Method.

[0091] 18. The method of paragraph 16 or 17, wherein the diluted personal care composition has a viscosity at least 10% higher than the viscosity of the compact personal care composition according to the Viscosity Method.

[0092] 19. The method of any one of paragraphs 16-18, wherein the diluted personal care composition comprises elongated micelles.

[0093] 20. The composition of any one of paragraphs 16-19, wherein the diluted personal care composition has a %T of greater than about 75 according to the Clarity Method.

[0094] 21. The method of one of paragraphs 16 to 20, wherein the diluted composition comprises about 11% to about 15%, preferably 12% to 14%, more preferably 13% total surfactant.

[0095] 22. Use of a composition according to any one of paragraphs 1 to 21 for washing hair.

[0096] twenty three. a. Dispensing a diluted personal cleansing composition of any one of paragraphs 16-21 onto a hand or an implement; b. applying the diluted personal care composition to a bodily surface; c. rinsing the diluted personal care composition from the bodily surface.

[0097] 24. The use of paragraph 22 or 23, wherein the diluted personal care composition is applied to a bodily surface more than 1 minute after making the diluted composition.

[0098] 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."

[0099] All documents cited herein, including any cross-referenced or related patents or patent applications, and any patent application or patent to which this application claims priority or benefit, 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 to teach, suggest, or disclose any such invention, either alone or in combination with any other reference or references. 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.

[0100] 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. 1. A compact personal care composition comprising: a. at least 20% by weight of the composition of a surfactant, i. greater than 50% by weight of the surfactant of an anionic alkyl olefin sulfonate surfactant; ii. 10% to 40% by weight of the surfactant of an amphoteric surfactant; a surfactant comprising b. Water; Including, 1. A composition, wherein the composition has a compact viscosity of less than 2000 MPa·s and a dilute viscosity of greater than 2000 MPa·s according to the Viscosity Method, and the composition is substantially free of sulfated surfactants.

2. The composition of claim 1, wherein the alkyl olefin sulfonate surfactant is an α-olefin sulfonate surfactant.

3. The composition of claim 2, wherein the α-olefin sulfonate surfactant is selected from sodium C12-14 olefin sulfonate, sodium C14-16 olefin sulfonate, or a combination thereof.

4. 4. The composition of any one of claims 1 to 3, wherein the composition comprises more than 20%, preferably more than 22%, more preferably more than 25%, and even more preferably more than 27% alkyl olefin sulfonate surfactant by weight of the composition.

5. The composition of any one of claims 1 to 4, wherein the amphoteric surfactant is selected from the group consisting of betaines, lauroamphoacetates, alkanolamides, and combinations thereof.

6. 6. The composition of any one of claims 1 to 5, further comprising a cationic conditioning polymer having a weight average molecular weight of 50 kDa to 2 MDa and a charge density of 1 meq / g to 2.5 meq / g.

7. The composition of any one of claims 1 to 6, further comprising an electrolyte viscosity modifier, preferably selected from sodium chloride, ammonium chloride, or a combination thereof.

8. 8. The composition of any one of claims 1 to 7, further comprising an anti-dandruff agent, preferably selected from azoles, hydroxylpyridone, zinc pyrithione, piroctone olamine, sulfur, ciclopirox, rilopirox, MEA-hydroxyoctyloxypyridinone, salicylic acid, azoxystrobin, 1,10-phenanthroline, or combinations thereof.

9. The composition of any one of claims 1 to 8, wherein the composition is free of viscosity modifiers selected from the group consisting of hydrotropes, water-miscible solvents, fatty acids, and acrylic polymers.

10. The composition of any one of claims 1 to 9, wherein the compact composition has a % T according to the Clarity Method of less than 50.

11. 1. A method of making a diluted personal cleansing composition, comprising: a. adding an amount of the compact personal cleaning composition of any one of claims 1 to 10 to a container; b. adding water to the container to form a diluted personal care composition, the amount of water added providing a composition to water ratio of 3:1 to 1:4, preferably 2:1 to 1:4, more preferably 1:1 to 1:4; A method comprising:

12. 12. The method of claim 11, wherein the diluted composition has a % T greater than 75 according to the Clarity Method.

13. 13. The method of claim 11 or 12, wherein the diluted personal care composition has a viscosity at least 10% higher than the viscosity of the compact personal care composition according to the Viscosity Method.

14. Use of a composition according to any one of claims 1 to 13 for washing hair.

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