COMPOSITION FOR PERSONAL CARE

Abstract

A personal care composition that includes an acyl taurate surfactant and exhibits improved foaming and lathering in hard water. The surfactant system in the personal care composition also includes an N-alkyl acyl taurate surfactant and / or an amphoteric co-surfactant. The weight ratio of acyl taurate to N-alkyl acyl taurate and / or co-surfactant is tailored to provide the desired hard water lather benefit. The surfactant system also permits viscosity building with inorganic salt and demonstrates good lather and foaming when a cationic conditioning polymer is added.

Description

1 / 55 COMPOSITION FOR PERSONAL CARE FIELD

[0001] The present disclosure relates generally to a personal care composition comprising an acyl taurate-based surfactant and an N-alkyl acyl taurate-based surfactant. More specifically, the present disclosure relates to personal care compositions comprising a combination of an acyl taurate-based surfactant and an N-alkyl acyl taurate surfactant and / or co-surfactant that provides improved foaming in hard water. BACKGROUND

[0002] Human hair and skin become dirty due to contact with the surrounding environment and sebum secreted by the scalp. Dirty hair, in particular, can have an undesirable sensory impression and / or appearance. Dirty hair and skin are typically cleaned with water and a personal care composition containing a surfactant, such as shampoo or liquid soap. When using personal care compositions, many consumers desire a good lather. In fact, the quantity and / or quality of lather is commonly associated with the performance of the personal care product. For example, a shampoo that provides abundant, rich, and creamy lather may be perceived as providing superior hair cleansing compared to a shampoo that provides less lather or less creamy lather. And consumers have been found to have a more pleasant cleansing experience when using products that generate more lather. Petition 870250079686, dated 05 / 09 / 2025, page 18 / 89 2 / 55

[0003] One factor that can affect the quantity and / or quality of foam produced by a personal care composition is water hardness. Hard water is characterized by a relatively high dissolved mineral content, especially calcium and magnesium. Water hardness can be based on calcium carbonate content. For example, more than 7.5 grains of calcium carbonate per gallon of water (gpg) is considered hard, while 0 to 3 gpg is considered soft. One grain equals 56.7 milligrams (0.002 ounces) of calcium carbonate. Water hardness can also be based on the total dissolved solids (TDS) content in the water. For example, a TDS of more than 120 ppm is typically considered hard, while a TDS of 60 or less is typically considered soft. Water with a TDS of 61 to 120 can be considered moderately hard and exhibits characteristics of either soft or hard water, depending on where it falls on the scale.

[0004] Using a personal care composition, such as shampoo, conditioner, or liquid soap, in hard water tends to result in less lather production compared to soft water. It is generally understood that minerals dissolved in water, especially calcium, form metallic ions in the water that can bind to the negatively charged portions of the surfactant in the personal care composition, reducing the quantity or quality (richness) of the lather. The metallic ions can also reduce the surfactant's ability to bind to and remove dirt and oil, negatively affecting product performance. Therefore, cleansing compositions such as shampoos, conditioners, and liquid body soaps tend to... Petition 870250079686, dated 05 / 09 / 2025, page 19 / 89 3 / 55 work best (e.g., provide the best foam) in soft water.

[0005] In the US, it is estimated that 85% of people do not have soft water, and this number may be higher worldwide. Therefore, there is a need for cleaning compositions that provide adequate foam when used in hard water.

[0006] Most personal care compositions (e.g., shampoos and body washes) are surfactant-based compositions. That is, the composition uses one or more surfactants to provide a cleansing benefit (detergent surfactant), a solubility benefit (co-surfactant), or another benefit (e.g., conditioning benefit). Sulfated surfactants are generally very good at removing oil and other contaminants from hair and skin, but they also have disadvantages. For example, sulfated surfactants are sometimes associated with a poor hair quality feel, dry hair, and / or dry skin after washing. This is commonly referred to as aggressiveness, and aggressive cleansing compositions may have low consumer acceptance. Thus, there is a need to provide a milder surfactant system that provides good cleansing benefits as well as overcomes the foaming and foaming problems associated with hard water.

[0007] A variety of relatively mild surfactants are known for use in personal care compositions. For example, N-alkyl acyl taurates, such as sodium methyl cocoyl taurate (SMCT) and sodium lauroyl taurate (SLT). Petition 870250079686, dated 05 / 09 / 2025, p. 20 / 89 4 / 55 taurate) are known and generally exhibit adequate solubility in water (e.g., compared to sodium cocoyl isethionate) and do not hydrolyze at acidic pH. However, the alkyl methyl group attached to the amide nitrogen in SMCT and SMLT can hinder the building of viscosity in an aqueous personal care composition by the addition of an inorganic salt, which is typically how viscosity is built in surfactant-based compositions. Without sufficient viscosity, it can be difficult to dispense and apply the composition in a controlled manner, and the composition may be perceived by a consumer as being of low quality.

[0008] Another disadvantage of removing sulfated surfactants is the difficulty of adding a cationic conditioning polymer. Conditioning shampoos (i.e., shampoos that provide a cleansing and conditioning benefit to the hair) typically include an anionic detergent surfactant and a cationic conditioning polymer. Cationic conditioning polymers form a coacervate with an anionic surfactant system during the intended use of the composition, which deposits on the hair to provide the benefit of easier wet combing and detangling desired by consumers. However, forming a coacervate in the product before use retains a portion of the surfactant and decreases the amount of surfactant available to provide foaming and cleansing.Since non-sulfated surfactants tend to be less effective than sulfated surfactants at foaming and cleaning, the addition of a cationic polymer can further overload a system. Petition 870250079686, dated 05 / 09 / 2025, page 21 / 89 5 / 55 of sulfate-free surfactant and result in further reductions in foam formation and cleaning.

[0009] Consequently, it would be desirable to provide a personal cleansing composition that provides adequate foaming and cleaning performance in hard water. It would also be desirable to provide a personal cleansing composition that includes a milder surfactant with suitable solubility, stability, foaming, and cleaning properties. It would be further desirable to provide a personal cleansing composition with a milder surfactant that allows thickening of the composition by the addition of an electrolyte, such as an inorganic salt. It would be even more desirable to provide a personal care composition with a milder surfactant and a cationic polymer that exhibits good foaming and good cleaning. SUMMARY OF THE INVENTION

[0010] This document discloses an aqueous composition for personal care comprising a detergent surfactant comprising an acyl taurate-based surfactant or a combination of an acyl taurate and an N-alkyl acyl taurate surfactant and an amphoteric co-surfactant, wherein the ratio between detergent surfactant and co-surfactant is from about 0.5:1 to about 2:1. DETAILED DESCRIPTION

[0011] Recent trends indicate a desire among consumers to replace their sulfate-based cleansing compositions with gentler, sulfate-free versions. However, conventional sulfate-free personal care compositions are commonly perceived as less effective due, at least in part, to the properties Petition 870250079686, dated 05 / 09 / 2025, page 22 / 89 6 / 55 of foaming and foaming properties are unsatisfactory compared to their sulfated counterparts. To make matters worse, the use of personal care compositions in hard water further inhibits foam generation and foaming. Surprisingly, it has now been discovered that the combination of an acyl taurate-based surfactant and an N-alkyl acyl taurate surfactant and / or an amphoteric co-surfactant can provide desirable foaming and foaming properties, even in hard water. It has also been found that these surfactant combinations can be combined with a cationic polymer (e.g., cationic conditioning polymers) with little or no undesirable impact on foam properties.

[0012] The reference within the descriptive report to modality(ies) or similar means that a specific material, resource, structure and / or characteristic described in conjunction with the modality is included in at least one modality, optionally multiple modalities, but does not mean that all modalities incorporate the described material, resource, structure and / or characteristic. Furthermore, materials, resources, structures and / or characteristics may be combined in any suitable manner by different modalities, and materials, resources, structures and / or characteristics may be omitted or substituted from what is described. Thus, the modalities and aspects described in this document may comprise or be combinable with elements or components of other modalities and / or aspects even if not expressly exemplified in combination, except where otherwise specified, or an incompatibility is specified. Petition 870250079686, dated 05 / 09 / 2025, p. 23 / 89 7 / 55

[0013] All ingredient percentages described in this document are by weight of the cosmetic composition, unless specifically indicated otherwise, and may be designated as % by weight. All ratios are weight ratios, except where specifically stated otherwise. All such percentages or weights, insofar as they refer to the ingredients mentioned, are based on the active content and therefore do not include vehicles or by-products that may be included in commercially available materials. The number of significant figures does not represent a limitation of the quantities indicated or the precision of the measurements. Unless otherwise indicated, all measurements are understood to be made at approximately 25°C and under ambient conditions, ambient conditions meaning conditions under approximately 1 atmosphere of pressure and approximately 50% relative humidity. All ranges are inclusive and combinable.For example, all numerical ranges include narrower ranges, and the delineated upper and lower range boundaries are interchangeable to create additional ranges not explicitly delineated.

[0014] The compositions of the present invention may comprise, consist essentially of, or consist of essential ingredients as well as optional ingredients described herein. As used herein, the expression "consist essentially of" means that the composition or component may contain additional ingredients, but only if these do not substantially alter the basic and novel characteristics of the claimed compositions or methods. As used in the description and appended claims, the forms in Petition 870250079686, dated 05 / 09 / 2025, page 24 / 89 8 / 55 singular um, uma and a, o should be understood as also including the plural forms, unless the context clearly indicates otherwise. Definitions

[0015] Approximately modifies a specific value by referencing a range of plus or minus 20% or less of the stated value (for example, plus or minus 15% or less, 10% or less, or even 5% or less).

[0016] To apply or application, as used in reference to a composition, means to apply or spread the composition onto a human keratinous surface, such as skin or hair.

[0017] Charge density (CD) means the ratio of positive charges in a polymer to the molecular weight of the polymer.

[0018] Cleansing composition refers to a personal care composition or product intended for use in cleaning a body surface, such as skin or hair. Some non-limiting examples of cleansing compositions are shampoos, conditioners, conditioning shampoos, shower gels, liquid hand cleansers, facial cleansers and the like.

[0019] Cosmetic agent means any substance, as well as any component thereof, intended to be rubbed, poured, sprinkled, sprayed, introduced or otherwise applied to the body of a mammal or any part thereof to provide a cosmetic effect. Cosmetic agents may include substances that are generally recognized as safe. Petition 870250079686, dated 05 / 09 / 2025, page 25 / 89 Rated 9 / 55 (GRAS - generally recognized as safe) by the U.S. Food and Drug Administration and food additives.

[0020] Suitable for application on human hair means that the personal care composition or components thereof are acceptable for use in contact with human hair, scalp and skin without undue toxicity, incompatibility, instability, allergic reaction and the like.

[0021] Substantially free of means that a composition or ingredient comprises less than 3% of a material in question, by weight of the composition or ingredient (for example, less than 2%, less than 1% or even less than 0.5%). Free of means that a composition or ingredient contains 0% of a material in question.

[0022] Sulfated surfactants means surfactants that contain a sulfate chemical moiety. Some non-limiting examples of sulfated surfactants are sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, and ammonium lauryl ether sulfate. Sulfate-free surfactant refers to a surfactant that does not have sulfate chemical moieties. Personal care composition

[0023] The sulfate-free personal care compositions in the present invention include a taurate-based detergent surfactant for cleaning a target body surface, such as hair and skin. In some cases, the personal care composition may include a co-surfactant, for example, to help solubilize the detergent surfactant or other ingredient in the composition. The taurate-based surfactant includes a surfactant based on Petition 870250079686, dated 05 / 09 / 2025, page 26 / 89 10 / 55 acyl taurate and, optionally, an N-alkyl acyl taurate surfactant (e.g., surfactant based on N-methyl, N-ethyl, N-propyl or N-butyl acyl taurate). The personal care composition may also include a cationic polymer to aid in the appearance and / or sensory impression of the hair (i.e., a conditioning polymer).

[0024] It has been surprisingly found that when a suitable acyl taurate-based surfactant is combined with a suitable N-alkyl acyl taurate surfactant and / or amphoteric co-surfactant, improved foaming in hard water is observed. This hard water foaming benefit is also present when a cationic conditioning polymer is added. In some cases, the combination of acyl taurate-based surfactant and N-alkyl acyl taurate surfactant can be tailored to provide a solubility and / or stability benefit.

[0025] The personal care compositions contained herein may be supplied in various product forms, such as solutions, suspensions, shampoos, conditioners, lotions, creams, gels, toners, sticks, sprays, aerosols, ointments, liquid cleansing soaps, solid bars, pastes, foams, mousses, shaving creams, wet wipes, strips, patches, hydrogels, film-forming products, facial and skin masks (with and without insoluble sheet) and the like. The form of the composition may follow from the particular dermatologically acceptable carrier chosen. In some respects, the personal care compositions described herein may include a dispersed gel network phase that provides a benefit of Petition 870250079686, dated 05 / 09 / 2025, page 27 / 89 11 / 55 Gentler yet effective conditioning for dirty hair in combination with a detergent taurate-based surfactant.

[0026] The liquid compositions for personal care in the present invention, such as shampoos, conditioners and liquid body soap, may have a viscosity of 2,000 mPa-s to 20,000 mPa-s (for example, 2,500 to 15,000 mPa-s, 3,000 to 10,000 mPa-s or 3,500 to 9,000 mPa-s) according to the Rheology method described in detail below. It is believed that viscosities in this range are generally preferred by users of liquid compositions for personal care.

[0027] In some aspects, the compositions of the present invention may contain an inorganic salt-based thickener, such as sodium chloride, potassium chloride, sodium sulfate, ammonium chloride, sodium bromide, combinations thereof, and the like. In some aspects, the inorganic salt may be present at 0 to 2% (e.g., 0.05 to 1% or 0.1 to 0.5%). In some sulfate-free cleaning compositions, the inorganic salt may introduce instability to the composition by aiding in the formation of a coacervate between anionic surfactants and cationic polymers, which may be present. This is typically perceived as instability of the composition. The coacervate typically has a gel-like consistency, which may precipitate when the composition is unstable, and may affect the rheological and performance properties of the composition, as well as the consumer-perceived quality of the personal care product.Therefore, it may be important to specifically adjust the amount of inorganic salt in the formulation. Too little salt can result in... Petition 870250079686, dated 05 / 09 / 2025, page 28 / 89 12 / 55 A composition with insufficient viscosity and too much salt can result in an unstable product.

[0028] Naturally, it should be considered that when the cleaning composition is used as intended, it will form a coacervate after dilution to provide the desired cleaning and / or conditioning benefit. Taurate-based surfactant

[0029] The sulfate-free surfactant system of the personal care compositions in the present invention includes an acyl taurate-based surfactant and, optionally, an N-alkyl acyl taurate surfactant to provide foaming and cleansing properties to the personal care composition. Such surfactants are generally referred to as detergent surfactants. Detergent surfactants facilitate cleaning due to their amphiphilic nature, which allows the surfactants to separate and form micelles around oil and other contaminants on the hair. The detergent surfactant also produces foam, which helps to remove trapped contaminants from the hair or skin so they can be rinsed more easily with water.

[0030] The composition may include 1 to 20% of taurate-based surfactant (e.g., 2 to 15%, 3 to 12% or 4 to 10%). The taurate-based surfactant may include a ratio between the weight of acyl taurate and the weight of N-alkyl acyl taurate of 1:4 to 50:1 (e.g., 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, 12:1, 13:1, 15:1, 20:1, 25:1, 30:1, 35:1, 40:1 or 45:1). It may be important not to include too much N-alkyl acyl taurate, because Petition 870250079686, dated 05 / 09 / 2025, page 29 / 89 13 / 55 can interfere with the ability to build viscosity in the composition, for example, with the use of inorganic salts such as sodium chloride and / or potassium chloride. Compositions with insufficient viscosity (i.e., thin) may be perceived as low quality by the consumer.

[0031] Acyl taurate surfactants that may be suitable for use in the present invention are generically described by Formula I illustrated below. THE II R--C--N--CH2—CH2SO3X H Formula 1

[0032] Where: R is an alkyl group with 5 to 23 carbon atoms (7 to 21, 7 to 17, 7 to 15, 7 to 13, 11 to 17, 11 to 15, 11 to 13 or even 11 carbon atoms) and X is a suitable contraion (e.g., sodium, potassium, magnesium, ammonium or triethanolamine).

[0033] Some non-limiting examples of acyl taurates are capric ester taurate, cocoyl taurate, lauroyl taurate, myristoyl taurate, caproyl taurate, oleoyl taurate, capryloyl taurate, palmitoyl taurate, stearoyl taurate, linoleoyl taurate, salts thereof and combinations thereof.

[0034] The N-alkyl acyl taurate surfactants in the present invention are generically described by Formula II illustrated below. Petition 870250079686, dated 05 / 09 / 2025, p. 30 / 89 14 / 55 O II R,--C--N--GH2—CH2SO3X r2 Formula II

[0035] Where: R1 is an alkyl group with 5 to 23 carbon atoms (7 to 21, 7 to 17, 7 to 15, 7 to 13, 11 to 17, 11 to 15, 11 to 13 or even 11 carbon atoms) and X is a suitable contraion (e.g., sodium, potassium, magnesium, ammonium or triethanolamine) and R2 is an alkyl group with 1 to 4 carbon atoms. Some non-limiting examples of N-alkyl acyl taurates that may be suitable for use in the present invention include methyl capric ester taurate, methyl cocoyl taurate, methyl lauroyl taurate, methyl myristoyl taurate, methyl caproyl taurate, methyl oleoyl taurate, methyl capryloyl taurate, methyl palmitoyl taurate, methyl stearoyl taurate, methyl linoleoyl taurate, salts thereof, and combinations thereof.

[0036] It should be considered that the taurate-based surfactants described herein are not typically single compounds, as suggested by their general formula (I) or (II), but instead a mixture of several homologs with varying chain lengths and molecular weights. Furthermore, the taurate-based surfactants in the present invention may be saturated or unsaturated. Cosurfactants

[0037] The personal care composition in the present invention may include a selected co-surfactant. Petition 870250079686, dated 05 / 09 / 2025, p. 31 / 89 15 / 55 among anionic surfactants, amphoteric surfactants, nonionic surfactants and combinations thereof. Some non-limiting examples of anionic co-surfactants include non-taurate anionic surfactants such as isethionates, carboxylates, sulfonates (e.g., alpha olefin sulfonates, linear alkylbenzene sulfonates, alkyl glyceryl sulfonates, sodium lauryl glucosides hydroxypropyl sulfonate), branched alkyl sulfates, sulfosuccinates, sulfoacetates, sulfolaurates, amino acid-based surfactants (e.g., glycinates, sarcosinates, alaninates, glutamates), lactate and lactylate-based surfactants (e.g., sodium lauroyl lactate and sodium lauroyl lactalite), phosphate ester-based surfactants, and combinations thereof.

[0038] Some non-limiting examples of amphoteric and / or zwitterionic surfactants include secondary and tertiary aliphatic amine derivatives in which one of the aliphatic substituents contains 8 to 18 carbon atoms and one aliphatic substituent contains an anionic group, such as a carboxy, sulfonate, phosphate, or phosphonate group. Zwitterionic surfactants are surfactants whose polar functional group has two permanent charges that do not change with changes in pH. Amphoteric surfactants have polar functional groups whose charge depends on the pH of the solution and may exhibit different charges as the pH changes from acidic to neutral to basic, varying from cationic to zwitterionic and potentially even anionic. Some non-limiting examples of zwitterionic surfactants include amide sulfobetaines, hydroxy sultines, propyl starch hydroxy sultines, and combinations thereof. Some Petition 870250079686, dated 05 / 09 / 2025, page 32 / 89 16 / 55 Non-limiting examples of amphoteric surfactants include amphoacetates, amphodiacetates, betaines, amidobetaines (e.g., cocamidopropyl betaine and lauramidopropyl betaine), amidosulfobetaines, propionates, and combinations thereof.

[0039] Some non-limiting examples of nonionic surfactants include glyceryl esters of alkanoic acids, polyglyceryl esters of alkanoic acids, propylene glycol esters of alkanoic acids, sorbitol esters of alkanoic acids, alkanolamides, alkoxylated amides, alkyl glycosides, alkyl polyglycosides acyl glucamides, amine oxides and combinations thereof. Some particularly suitable examples of nonionic surfactants include cocamide, cocamide MEA, PPG-2 cocamide, PPG-2 hydroxyethyl cocamide, PPG-2 hydroxyethyl isostearamide, lauroyl / myristoyl methyl glucamide, capryloyl / caproyl methyl glucamide, cocoyl methyl glucamide, decyl glucoside, coco-glucoside, lauryl glucoside, lauramine oxide, cocamine oxide, and combinations thereof.

[0040] More specific examples of the optional co-surfactants described above are disclosed in documents US 2019 / 0105246, US 2018 / 0098923, US 9,271,908, WO 2020 / 016097 and McCutcheon's Emulsifiers and Detergents, 2019, MC Publishing Co.

[0041] The co-surfactant may be present in personal care compositions from 1% to 15% (e.g., 2 to 10%, 3 to 9%, 4 to 8% or even 5 to 7%). The amount of co-surfactant in the composition can be important and should be adjusted to balance the viscosity buildup with the Petition 870250079686, dated 05 / 09 / 2025, p. 33 / 89 17 / 55 benefit of cleaning and / or conditioning. For example, too much amphoteric co-surfactant can make the surfactant system less salt-tolerant and can impede the surfactant system's ability to form a proper coacervate after dilution with water. This can be especially problematic when the composition contains a cationic polymer, because the reduced salt tolerance of the surfactant system can cause the cationic polymer to precipitate. In some embodiments, the composition may include a ratio of total taurate-based surfactant weight to amphoteric co-surfactant weight of 12:1 to 1:1 (6:1 to 3:10, 4:1 to 1:3, or even 2:1). It may be particularly desirable to provide a ratio of detergent surfactant to co-surfactant of 0.5:1 to 2:1 (e.g., 1:1 to 1.5:1). Cationic polymer

[0042] The personal care compositions in the present invention may include 0.05% to 3% of a cationic polymer (for example, 0.1% to 2%, or even 0.2% to 0.8%) to provide improved appearance, sensory impression, or deposition benefits to hair or skin. The cationic polymer may have a weight-average molecular weight of 50 kDa to about 5 MDa (for example, 500 kDa to 4 MDa, 1 to 3 MDa, 1.2 to 2 MDa, or even 1.4 to 1.8 MDa) and a charge density of 0.2 meq / g to 12 meq / g (for example, 0.4 to 10 meq / g, 0.4 to 5 meq / g, 0.4 to 4 meq / g, 0.4 to 3 meq / g, or even 0.4 to 2 meq / g). Charge densities can be measured at the pH of the intended use of the personal care composition, which can be from pH 3 to pH 9 (e.g., pH 4 to 8 or pH 4.5 to 6.5). Petition 870250079686, dated 05 / 09 / 2025, p. 34 / 89 18 / 55

[0043] Cationic polymers may include nitrogen-containing cationic moieties, such as quaternary ammonium compounds, or cationic protonated amino moieties. Cationic protonated amines may be primary, secondary, or tertiary amines, depending on the particular species and the selected pH of the composition. Anionic counterions may be used in association with cationic polymers, provided the polymers remain soluble. Examples of suitable counterions include halide counterions (e.g., chloride, fluoride, bromide, iodide).

[0044] Some non-limiting examples of cationic polymers include copolymers of vinyl monomers with cationic protonated amine or quaternary ammonium functionalities with water-soluble spacer monomers such as acrylamide, methacrylamide, alkyl and dialkyl acrylamides, alkyl and dialkyl methacrylamides, alkyl acrylate, alkyl methacrylate, vinyl caprolactone or vinyl pyrrolidone.Some non-limiting examples of cationic protonated quaternary ammonium and amino monomers include vinyl compounds substituted with dialkylaminoalkyl acrylate, dialkylaminoalkyl methacrylate, monoalkylaminoalkyl acrylate, monoalkylaminoalkyl methacrylate, trialkyl methacryloxyalkyl ammonium salt, trialkyl acryloxyalkyl ammonium salt, quaternary diallyl ammonium salts, and quaternary vinyl ammonium monomers with nitrogen-containing cyclic cationic rings such as pyridinium, imidazolium, and quaternized pyrrolidone, for example, alkyl vinyl imidazolium, alkyl vinyl pyridinium, and alkyl vinyl pyrrolidone salts. Petition 870250079686, dated 05 / 09 / 2025, page 35 / 89 19 / 55

[0045] Additional non-limiting examples of cationic polymers include copolymers of 1-vinyl-2-pyrrolidone and 1-vinyl-3-methylimidazolium salt (e.g., chloride salt) (called polyquaternium-16 by the Personal Care Products Council (PCPC) in the industry); copolymers of 1-vinyl-2-pyrrolidone and dimethylaminoethyl methacrylate (polyquaternium-11); cationic polymers containing diallyl quaternary ammonium compounds, including, for example, dimethyl diallyl ammonium chloride homopolymer, acrylamide and dimethyl diallyl ammonium chloride copolymers (polyquaternium-6 and polyquaternium-7, respectively);Amphoteric copolymers of acrylic acid including copolymers of acrylic acid and dimethyl diallyl ammonium chloride (polyquaternium-22), terpolymers of acrylic acid with dimethyl diallyl ammonium chloride and acrylamide (polyquaternium-39) and terpolymers of acrylic acid with propyl trimethylammonium methacrylate chloride and methyl acrylate (polyquaternium-47). In some respects, suitable substituted cationic monomers include cationic substituted dialkyl amino alkyl acrylamides, dialkyl amino alkyl methacrylamides and combinations thereof. The cationic polymer can be AM:TRIQUAT, which is a copolymer of acrylamide and 1,3-propanediamine trichloride, N-[2[[[dimethyl[3-[(2-methyl-1-oxo-2propenyl)amino]propyl]ammonium]acetyl]amino]ethyl]2-hydroxyN,N,N',N',N'-pentamethyl-(polyquaternium-76). AM:TRIQUAT can have a charge density of 1.6 meq / g and a molecular weight of 1.1 MDa. Petition 870250079686, dated 05 / 09 / 2025, page 36 / 89 20 / 55

[0046] In some respects, the cationic monomer may be propyl trimonium polymethacrylamidochloride, available under the trade name Polycare® 133 from Solvay (Brussels, Belgium). Copolymers of the cationic monomer may also be suitable, and the charge density of the total copolymer may be 2.0 meq / g 4.5 meq / g.

[0047] Other cationic polymers include polysaccharide polymers, such as cationic cellulose derivatives and cationic starch derivatives. In certain embodiments, a cationic cellulose polymer may be selected from epoxide-substituted hydroxyethyl cellulose salts reacted with trimethylammonium, industrially known as polyquaternium-10 (PCPC) and available from Dow Chemical Company as UCARE™ JR-30M, KG-30M, and LR-30M. Other examples of cationic cellulose polymers include epoxide-substituted lauryl dimethyl ammonium polymer quaternary ammonium salts reacted with polyquaternium-24 (PCPC).

[0048] Other examples of cationic polymers include cationic guar gum derivatives, such as guar gum hydroxypropyltrimonium chloride, such as the Jaguar® series available from Solvay and the N-Hance™ and AquaCat™ series available from Ashland (Wilmington, Delaware, USA). Further disclosure of cationic guar gum derivatives can be found in US Patent No. 6,930,078.

[0049] In some cases, the cationic polymer may include a synthetic or derivative cationic polymer, present from 0.025% to about 5%. Preferred synthetic cationic polymers are generally water-soluble or dispersible and non-crosslinked. In some cases, the polymer Petition 870250079686, dated 05 / 09 / 2025, page 37 / 89 21 / 55 Synthetic cationic polymers may be copolymers that include one or more cationic monomer units and one or more non-ionic or anionic monomer units, provided the copolymer has a net positive charge. Synthetic cationic polymers may have a cationic charge density of 0.5 meq / ga to 12 meq / ge and an average molecular weight of 1 kDa to 5 MDa. Some non-limiting examples of synthetic cationic polymers are described in US patent 2003 / 0223951. Carrier

[0050] The composition may optionally include 20 to 95% of an aqueous carrier, such as water and / or a water-miscible solvent. The type and amount of aqueous carrier should be selected to give the composition the desired rheological properties. The liquid carrier may be water with, for example, less than 5%, 3%, 1%, 0.5% or even 0% of miscible organic solvent. Some non-limiting examples of organic solvents include lower alkyl alcohols (e.g., ethanol and isopropanol) and polyhydric alcohols (e.g., propylene glycol, hexylene glycol, glycerin and propanediol). Optional ingredients

[0051] The personal care compositions described herein may include a variety of optional ingredients to adapt the properties and characteristics of the composition as desired. Optional ingredients may be materials that are commonly included in compositions of this type. Optional ingredients must be physically and chemically compatible with the essential components of the personal care compositions and must not unduly impair stability, aesthetics, or the Petition 870250079686, dated 05 / 09 / 2025, page 38 / 89 22 / 55 composition performance. Individual concentrations of optional components can generally range from 0.001% to 10%.

[0052] Some non-limiting examples of optional ingredients that may be included in the personal care compositions of the present invention include deposition aids, cationic polymers, conditioning agents (including gel network, triglyceride oils, hydrocarbon oils, fatty esters, silicones), anti-dandruff agents (e.g., zinc pyrithione, zinc carbonate, piroctone olamine, piroctone, ciclopirox, rilopirox, MEA-hydroxy-octyloxypyridinone, azoxystrobin, sulfur, azoles, salicylic acid and selenium sulfide, 1,10-phenanthroline), antimicrobial agents, suspending agents, viscosity modifiers, colorants, pigments, non-volatile solvents or diluents (water-soluble and insoluble), pearlescent aids, foam enhancers, pediculicides, pH adjusting agents, perfumes, preservatives, chelating agents, proteins, vitamins, amino acids, active skin agents, sunscreens, UV absorbers,stabilizers and combinations thereof. Method for making a personal care composition

[0053] The personal care composition described in this document can be produced using conventional methods for producing compositions of the desired type (for example, shampoo, conditioner or body wash), for example, as described below in the Examples. A particularly suitable method for producing the compositions in the present invention is described in Example 1. Petition 870250079686, dated 05 / 09 / 2025, page 39 / 89 23 / 55 below. In some aspects, the composition may include a gel network to aid in conditioning the hair or scalp. US Publication No. 2006 / 269501 discloses methods for producing gel networks that may be suitable for use in the present invention. Method of use

[0054] The personal care compositions described herein may be used conventionally for cleansing and conditioning hair or skin. Effective amounts of the composition for use generally range from 1 ga to 50 g (e.g., 1 ga is approximately 20 g). In general, a method for treating hair or skin may involve applying the personal care composition to the hair or skin. For example, an effective amount of the personal care composition may be applied to hair or skin that has been moistened with water, and then the composition may be removed by rinsing. Application to hair typically involves working the composition through the hair so that most or all of the hair is brought into contact with the composition. The personal care composition may be used as a liquid, solid, semi-solid, flake, gel, foam, in a pressurized container with an added propellant, or used in the form of a spray pump.The viscosity of the product can be selected to accommodate the desired shape.

[0055] In some respects, the hair or skin treatment method may 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 skin or hair areas. Petition 870250079686, dated 05 / 09 / 2025, page 40 / 89 24 / 55 applied with water. These steps can be repeated as many times as desired to achieve the desired cleaning and conditioning benefit. Methods Foam robustness

[0056] Consumers generally associate foam and foam formation with the quality of a personal cleansing composition, such as a shampoo or liquid body wash. This method provides a way to simulate the foam produced by surfactants under typical usage conditions, across a wide range of water hardness conditions, and to quantify certain foam properties. Oil (e.g., sebum) is one of the most common contaminants found in hair that can undesirably affect the foam properties of a shampoo. Thus, this method evaluates the effect of oil on foam properties.

[0057] 100 mL of DI water, which has a water hardness of 0 gpg (at 100 °F), are added to a suitable mixer (e.g., KitchenAid KSB560CU1 food mixer or equivalent), followed by 2 mL of the test composition and 1 mL of olive oil. Mix the mixture on the stir setting for 30 seconds and measure the height of the foam inside the mixer in centimeters and record it as the foam height at 0 gpg.

[0058] 100 mL of water at 25 gpg at 100°F are added to a suitable blender (e.g., KitchenAid KSB560CU1 food mixer or equivalent), followed by 2 mL of the test composition and 1 mL of extra virgin olive oil. Mix the mixture on the stir setting for 30 seconds and measure the height of the foam within. Petition 870250079686, dated 05 / 09 / 2025, p. 41 / 89 25 / 55 of the mixer in centimeters and record as foam height at 25 gpg. 25 gpg of water can be prepared by first making a brine solution containing 22.5 g of magnesium chloride hexahydrate and 61 g of calcium carbonate completely dissolved in 1 L of DI water, then adding 235 mL of this brine solution to 50 L of DI water and mixing thoroughly to ensure homogeneity.

[0059] 25 gpg water can be prepared as follows. Dissolve 22.5 g of magnesium chloride hexahydrate and 61 g of calcium carbonate in 1 liter of DI water to form a brine solution. Add 235 mL of brine solution to 50 L of DI water and mix to provide a 25 gpg water solution.

[0060] The foam robustness of a composition, which is represented by the % drop in foam height between 0 gpg and 25 gpg of water, can be calculated using the following equation: Foam height 0 gpg — Foam height 25 gpg % drop =-----------—---------------------------Foam height 0 gpg Formula III Rheology

[0061] The viscosities of personal care compositions can be measured in a 2.5 mL sample using a Brookfield®RS cone and plate rheometer with a C75 cone for 1 to 2 s-1 at 27 °C for 3 minutes. Petition 870250079686, dated 05 / 09 / 2025, page 42 / 89 26 / 55 Water hardness method

[0062] The hardness of a water sample can be determined using a test strip from a water hardness test kit, such as WaterWorks™ Total Hardness or equivalent, according to the manufacturer's instructions for use. Examples Example 1: Formulations of the examples

[0063] Table 1 provides working examples of personal care composition formulations of the invention. The compositions in Table 1 are made by adding DI water to a mixing vessel and then adding each subsequent ingredient while stirring. Surfactants with low water solubility, such as cocamide MEA or sodium cocoyl isethionate, if present, require the composition to be heated to 50 to 75 °C and stirred until completely solubilized (i.e., no visible particles remain and the batch is transparent). The remaining ingredients, except for cationic polymer or volatile materials, are then added to the mixing vessel and mixed until completely dissolved or solubilized. If heated, the composition is then cooled to 35 °C or less before volatile ingredients, such as perfume, are added.If the cationic polymer is present, in a separate container, the cationic polymer is mixed with water at a ratio of 1:20 (polymer:water) to form a fluid paste or dilute solution, which is then added to the cooled composition in the mixing vessel and mixed for 10 minutes. The pH of the composition is adjusted with citric acid (typically 0.2-0.5%). The viscosity is... Petition 870250079686, dated 05 / 09 / 2025, page 43 / 89 27 / 55 adjusted with sodium chloride. DI water is added to bring the final volume to 100%. The mixture is stirred until homogeneous (~10 minutes).

[0064] The foam height of the exemplary composition was determined according to the Foam Robustness method described above. A percentage drop in foam height of more than 55% is considered unacceptable. A percentage drop in foam height of 55% or less is considered acceptable, a percentage drop of less than 30% is preferred, a percentage drop of less than 20% is particularly preferred, and a percentage drop of less than 10% is ideal. Petition 870250079686, dated 05 / 09 / 2025, page 44 / 89 Table 1 Ingredient 1 2 3 4 5 6 % by weight of active ingredient SLT 1 5.5 7.3 5 3.6 4.4 3.6 SMLT 2 0.5 0.7 0.4 0.6 0.4 C14-16 Sodium Olefin Sulfonate 3 4 3 3 4 Cocamidopropyl Betaine 4 5 4 5 2 2 4 Laurylamidopropyl Betaine 5 2 Ammonium Lauryl Sulfate 9 5 4 Guar Hydroxypropyltriammonium Chloride 6 0.4 0.4 0.4 Polyquaternium-10 7 0.25 Piroctone Olamine 8 0.5 Sodium Benzoate 0.5 0.5 0.75 0.15 Sodium Salicylate 0.25 0.25 0.45 0.015 EDTA Tetrasodium 0.13 0.13 0.16 0.013 Perfume 0.8 0.8 1.1 0.75 Citric acid up to pH 5.4 up to pH 5.5 up to pH 5.9 up to pH 5.4 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 28 / 55 Petition 870250079686, dated 05 / 09 / 2025, page 45 / 89 Sodium chloride (excludes lingering residues) 0.2 0.6 0.2 1.5 0.3 Water qspqspqspqspqspqsp Ratio between SLT and SMLT 10.3:1 10.3:1 N / A 10.3:1 8:1 8:1 Total surfactant 15 15 13 12 12 12 Total taurate-based surfactant 6 8 5 4 5 4 Total amphoteric surfactant 5 4 5 4 2 4 Total taurate:amphoteric ratio 1.2:1 2:1 1:1 1:1 2.5:1 1:1 Foam height, 0 gpg (cm) 8.5 8.5 8 8 9 7.9 Foam height, 25 gpg (cm) 8 4 5.0 6.5 5.9 4.5% drop 0 to 25 gpg 6% 53% 38% 19% 34% 43% 29 / 55 1. Sodium lauroyl taurate available from P&G Chemicals 2. Sodium methyl lauroyl taurate available from P&G Chemicals or Geropon® TL 32 L available next to Syensqo 3. Bio-terge® AS-40 HP available near Stepan 4. Tego Betaine CK PH 12 available near Evonik 5. Mirataine® DAB ULS MB available alongside Syensqo 6. Naternal™ Excel available through Syensqo 7. UCARE™ JR30M available from Dow 8. Octopirox available near Clariant 9. Texapon® ALS Benz from BASF Petition 870250079686, dated 05 / 09 / 2025, p. 46 / 89 30 / 55 Example 2: Example of formulation

[0065] Table 2 shows prophetic examples of the personal care composition of the invention. These examples can be made as described above using known techniques. Unless otherwise indicated, the materials used in these examples can come from the same suppliers as described above in Example 1. Petition 870250079686, dated 05 / 09 / 2025, p. 47 / 89 Table 2 Ingredient 7 8 9 10 11 12 % by weight of active ingredient SLT 4.0 6.6 2.0 5.8 SMLT 4.0 0.4 0.5 0.2 SCT 1 2.3 9.3 SMCT 2 1.2 0.2 C14-16 sodium olefin sulfonate 4 C12-14 sodium olefin sulfonate 4.5 Sodium tridecyl sulfate (80 to 99% branched alkyl chain) 6 2.5 Lauryl glycoside 3 1.2 Disodium laureth sulfosuccinate 4 2 Disodium lauryl sulfosuccinate 5 2 Cocamidopropyl betaine 7 Laurylamidopropyl betaine 2.8 1 2 Coco-betaine 6 3 31 / 55 Petition 870250079686, dated 05 / 09 / 2025, page 48 / 89 Lauryl betaine 7 1.75 2 2 Sodium lauroamphoacetate 8 1 Disodium cocoamphodiacetate 9 4 1 Hydroxypropyltrimonium alpha-glucan chloride 10 0.75 0.5 Guar hydroxypropyltrimonium chloride 0.6 0.2 Guar gum hydroxypropyltrimonium chloride 11 0.5 0.1 Polyquaternium-10 0.3 0.2 Piroctone olamine12 0.5 Zinc pyrithione13 1 Glycol distearate 14 2.5 Sodium benzoate 0.15 0.18 0.1 0.25 0.5 0.25 Sodium salicylate 0.15 0.2 0.1 0.2 Tetrasodium EDTA 0.13 0.13 0.13 Methyl chloro isothiazolinone / Methyl isothiazolinone 15 0.0005 0.0005 Perfume 1.1 0.5 0.8 1.2 1 1 32 / 55 Petition 870250079686, dated 05 / 09 / 2025, page 49 / 89 Citric acid to pH 6 to pH 5.5 to pH 4.7 to pH 5.2 to pH 6.5 to pH 5 Sodium chloride (excludes persistent residues) 0.2 0.2 0.2 0.8 0.6 0.4 Water qspqspqspqspqspqsp 1. Sodium cocoyl taurate available from P&G Chemicals 2. Sodium methyl cocoyl taurate available from P&G Chemicals or Geropon® TC 95 P or Geropon® TC 30 available from Solvay. 3. Plantapon® 1200 N UP from BASF 4. Chemccinate™ DSLS-BA available together with Lubrizol 5. Cola®Mate LA-40 from Colonial Chemical 6. Dehyton® AB 30 available from BASF 7. Empigen® BB / HP by Innospec 8. BASF Dehyton® AB 30 (coco-betaine) 9. Amphosol® 2C by Stepan 10. Hydroxypropyltrimonium Alpha-Glucan Chloride (MW = 185 kDA, DS = 0.03 - 0.15) 11. N-Hance™ BF-17 available near Ashland 12. Octopirox® available from Clariant. 13. U2 ZPT available near Arxada or FPS ZPT available near Kolon 14. Purified EGDS available with Evonik 15. Kathon™ CG Broad Spectrum Microbiocide 33 / 55 Petition 870250079686, dated 05 / 09 / 2025, p. 50 / 89 34 / 55 Example 3: Benefit of foam height

[0066] These Examples demonstrate the foam robustness benefit that can be provided by combining the invention of acyl taurate and N-alkyl acyl taurate and amphoteric co-surfactant, when the personal care composition is used in hard water. The foam heights of the test compositions were determined according to the Foam Robustness method. The compositions of the invention are designated as Inv and the comparative (i.e., non-inventive) compositions are designated as Comp. Petition 870250079686, dated 05 / 09 / 2025, p. 51 / 89 Table 3 Ingredient Comparative Example 1 Inv 1 Comparative Example 2 Inv 2 Comparative Example 3 Inv 3 Comparative Example 4 Inv 4 % by weight of active ingredient SLT 8.2 5.5 8.2 5.5 8.2 5.5 8.2 5.5 SMLT 0.8 0.5 0.8 0.5 0.8 0.5 0.8 0.5 Cocamidopropyl betaine 3 6 Laurylamidopropyl betaine 3 6 Coco-betaine 3 6 Sodium lauroamphoacetate 3 6 Citric acid up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 up to pH 5.0 to 5.5 Sodium chloride 0.55 Water qspqspqspqspqspqspqsp. qsp 35 / 55 Petition 870250079686, dated 05 / 09 / 2025, page 52 / 89 Ratio between SLT and SMLT 10.5:1 10.5:1 10.5:1 10.5:1 10.5:1 10.5:1 10.5:1 10.5:1 Total surfactant 12 12 12 12 12 12 12 12 Total taurate-based surfactant 9 6 9 6 9 6 9 6 Total amphoteric surfactant 3 6 3 6 3 6 3 6 Total taurate:amphoteric ratio 3:1 1:1 3:1 1:1 3:1 1:1 3:1 1:1 Foam height, 0 gpg (cm) 9 7.7 9 8.5 9 7.7 8 8 Foam height, 25 gpg (cm) 0.2 6.8 0.5 7.0 0.1 6.8 2 5 % drop from 0 to 2 5 gpg 98 % 12 % 94 % 18 % 99 % 12 % 75 % 38 % 36 / 55 Petition 870250079686, dated 05 / 09 / 2025, p. 53 / 89 37 / 55

[0067] As can be seen in Table 3, adjusting the ratio between taurate and amphoteric surfactants is important to provide a foaming benefit in hard water. In particular, going from a 3:1 ratio, where there is essentially no foam and a 75-99% drop in foam height, to a 1:1 ratio provides a surprising improvement in the amount of foaming in hard water and substantially reduces the percentage drop in foam height. Example 4: Effect of additional co-surfactants.

[0068] This example demonstrates the critical importance of the ratio between taurate and total amphoteric surfactant, even in the presence of additional co-surfactants, on the hard water foaming benefit of the personal care composition. Invention Example 3b has been included to demonstrate that the ratio between acyl taurate and N-alkyl acyl taurate is not as critically important for robust hard water foaming as other properties of the composition, such as solubility or viscosity building of acyl taurate. Petition 870250079686, dated 05 / 09 / 2025, page 54 / 89 Table 4 Ingredient Comparative Example 1 Inv 1 Comparative Example 2 Inv 2 Comparative Example 3 Inv 3a Inv 3b % by weight of active ingredient SLT 4.4 3.6 4.4 3.6 4.4 3.6 3 SMLT 0.6 0.4 0.6 0.4 0.6 0.4 1 Decyl glycoside 5 4 5 4 C14-16 sodium olefin sulfonate 5 4 4 Cocamidopropyl betaine 2 4 2 4 4 Laurylamidopropyl betaine 2 4 38 / 55 Petition 870250079686, dated 05 / 09 / 2025, p. 55 / 89 Citric acid to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 Sodium chloride 3.8 1.7 4.2 3.4 3.6 2.1 0.8 Water qspqspqspqspqspqspqsp. Ratio between SLT and SMLT 8:1 8:1 8:1 8:1 8:1 8:1 3:1 Total surfactant 12 12 12 12 12 12 12 Total taurate-based surfactant 5 4 5 4 5 4 4 Total amphoteric surfactant 2 4 2 4 2 4 4 Total taurate:amphoteric ratio 2.5:1 1:1 2.5:1 1:1 2.5:1 1:1 1:1 Foam height, 0 gpg (cm) 7.9 9 7.9 8.1 8.1 9 7.5 39 / 55 Petition 870250079686, dated 05 / 09 / 2025, p. 56 / 89 Foam height, 25 gpg (cm) 0.9 6.8 0.5 7.2 1.1 6.8 5.5 % drop from 0 to 25 gpg 89% 25% 94% 11% 86% 25% 27% Continuation of Table 4 Ingredient Comparative Example 4 Inv 4 Comparative Example 5 Inv 5 Comparative Example 6 Inv 6 Comparative Example 7 Inv 7 % by weight of active ingredient SLT 4.4 3.6 4.4 3.6 4.4 3.6 4.4 3.6 SMLT 0.6 0.4 0.6 0.4 0.6 0.4 0.6 0.4 Decyl glycoside 5 4 C14-16 sodium olefin sulfonate 5 4 5 4 C12-131 sodium alkyl sulfate 5 4 Cocamidopropyl betaine 2 4 2 4 40 / 55 Petition 870250079686, dated 05 / 09 / 2025, page 57 / 89 Laurylamidopropyl betaine 2 4 2 4 Piroctone olamine 0.5 0.5 0.5 0.5 Perfume 0.75 0.7 5 0.75 0.7 5 Citric acid to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 to pH 5.0 to 5.5 Sodium chloride 4.1 3.1 1.3 0.4 0.9 0.1 1.9 1.3 Water qspqspqspqs .pqspqs .pqspqs .p. Ratio between SLT and SMLT 8:1 8:1 8:1 8:1 8:1 8:1 8:1 8:1 Total surfactant 12 12 12 12 12 12 12 12 Total taurate-based surfactant 5 4 5 4 5 4 5 4 41 / 55 Petition 870250079686, dated 05 / 09 / 2025, pp. 58 / 89 Total amphoteric surfactant 2 4 2 4 2 4 2 4 Total taurate:amphoteric ratio 2.5:1 1:1 2.5:1 1:1 2.5:1 1:1 2.5:1 1:1 Foam height, 0 gpg (cm) 8.1 9 9 9 9.0 8.8 9.0 9.0 Foam height, 25 gpg (cm) 1.1 6.8 2.3 4.5 1.4 6.8 1.8 7.7 % drop 0 to 25 gpg 86% 25% 75% 50% 84% 23% 80% 14% 42 / 55 Continuation of Table 4 Ingredient Inv 8 Inv 9 Inv 10 % by weight of active ingredient SLT 2.7 2.7 4.6 SMLT 0.3 0.3 0.4 Sodium olefin sulfonate C14-16 7 5 3 Petition 870250079686, dated 05 / 09 / 2025, p. 59 / 89 Cocamidopropyl betaine 5 5 5 Hydroxypropyltrimonium guar chloride 0.4 0.4 0.4 Sodium benzoate 0.5 0.5 0.5 Sodium salicylate 0.25 0.25 0.25 Tetrasodium EDTA 0.13 0.13 0.13 Perfume 0.8 0.8 0.8 Citric acid to pH 5.4 to pH 5.6 to pH 5.6 Sodium chloride (excludes lingering residues) 0.2 0.2 0.2 Water q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. q.s. Ratio between SLT and SMLT 10.3:1 10.3:1 10.3:1 Total surfactant 15 13 13 Total taurate-based surfactant 3 3 5 Total amphoteric surfactant 5 5 5 Taurate ratio total:amphoteric 0.6:1 0.6:1 1:1 43 / 55 Petition 870250079686, dated 05 / 09 / 2025, pp. 60 / 89 Foam height, 0 gpg (cm) 8 8.5 8.5 Foam height, 25 gpg (cm) 7 5.5 7.5% drop: 0 to 25 gpg 13% 35% 12% 1. Dacpon 27-23 AL available near Sasol (54% branched alkyl chain) 44 / 55 Petition 870250079686, dated 05 / 09 / 2025, p. 61 / 89 45 / 55

[0069] As can be seen in Table 4, the comparative examples demonstrate that the addition of a third surfactant (e.g., nonionic or anionic co-surfactant) did not improve foam formation in hard water when the ratio between taurate and total amphoteric surfactant was 2.5:1, even though the ratio between taurate and nonionic or anionic surfactant was 1:1. However, decreasing the ratio of taurate-based surfactant to amphoteric surfactant to 1:1 once again provided a surprising improvement in foam formation in hard water and decreased the % drop in foam height in the respective compositions of the invention.

[0070] Perhaps even more surprising is that adjusting the ratio between taurate-based and amphoteric surfactants improved foam formation in hard water as much as it increased the total surfactant content, a known trade-off for the negative impact of hard water on foam quantities. For example, Composition Inv 9 contains 13% total surfactant and showed a 35% percentage drop in foam height, which is acceptable. The comparison of Composition Inv 9 compared to Inv 8 shows that the addition of 2% sodium C14-16 olefin sulfonate to Composition Inv 9, thereby increasing the total surfactant content to 15% (Inv 8), resulted in a percentage drop in improvement to 13%. Increasing the taurate to total amphoteric surfactant ratio from 0.6:1 (Inv 9) to 1:1 (Inv 10), while maintaining a low total surfactant content of 13%, provided an unexpected percentage drop in improvement to 12%, which was equivalent to the improvement observed with the increase in total surfactant content. This further highlights the importance Petition 870250079686, dated 05 / 09 / 2025, pp. 62 / 89 46 / 55 of the ratio between taurate-based and amphoteric surfactants to provide foaming benefits in hard water, even at low total surfactant contents. Example 5: Effect of the cationic polymer.

[0071] This Example demonstrates the effect of a cationic polymer, such as guar gum hydroxypropyltrimonium chloride or polyquaternium-10, on the hard water foaming benefit of the personal care composition. Examples of the invention of personal care compositions are provided in Table 5, together with a summary of the foam test results. Table 5 Ingredient 5-1 5-2 5-3 5-4 % by weight of active ingredient SLT 9.1 4.1 6 SMLT 0.9 0.4 SCT 8.2 SMCT 0.8 Coco-betaine 6 Laurylamidopropyl betaine 7 5.4 5.4 Cocamidopropyl betaine 4.4 4.4 Guar hydroxypropyltrimonium chloride 0.4 Polyquaternium-10 0.4 0.4 Sodium benzoate 0.25 0.75 0.75 Petition 870250079686, dated 05 / 09 / 2025, pp. 63 / 89 47 / 55 Sodium salicylate 0.25 0.45 0.45 Tetrasodium EDTA 0.13 0.13 0.13 0.13 Methylchloroisothiazolinone / Methylisothiazolinone 5 ppm Perfume 1.1 1 1.1 1.1 Citric acid up to pH 5.5 up to pH 5.6 up to pH 6.0 up to pH 6.0 Sodium chloride 0.4 1 Sodium xylenesulfonate 0.5 Water q.s.p.q ... 9.8 Taurate:Total Amphoteric Ratio 1.7 1.3 0.5 0.6 Foam Height, 0 gpg (cm) 9 8.5 7 8.5 Foam Height, 25 gpg (cm) 8.3 8 5.5 6.0 Petition 870250079686, dated 05 / 09 / 2025, pp. 64 / 89 48 / 55 % drop 0 to 25 gpg 8 % 6 % 21 % 29 %

[0072] As can be seen in Table 5, the personal care composition still showed an acceptable amount of foam generation, even when a cationic polymer was added. Example 6: Comparative examples

[0073] This example provides comparative personal care compositions that do not offer the hard water foaming benefit of the compositions described herein. Petition 870250079686, dated 05 / 09 / 2025, pages 65 / 89 Table 6 Ingredient Comp 6-1 Comp 6-2 Comp 6-3 Comp 6-4 Comp 6-5 Comp 6-6 SLT 7.695 0.855 7.695 0.855 8.2 5.5 SMLT 0.855 7.695 0.855 7.695 0.8 0.5 Cocamidopropyl hydroxysultaine (CAPHS) 1 6.6 6.6 6.6 6.6 Lauryl hydroxysultaine 2 3 6 Cocamidopropyl betaine Polyquaternium-7 3 0.03 0.03 0.03 0.03 PEG-150 distearate 4 0.2 0.2 PEG-100 stearate 5 0.2 0.2 Citric acid until pH until pH until pH until pH until pH until pH 5.0 5.0 to 5.0 to 5.0 to 5.0 to 5.5 5.5 5.5 5.5 5.5 5.5 Sodium chloride Water qspqspqspqspqspqsp Ratio between SLT and SMLT 9:1 1:9 9:1 1:9 10.5:1 10.5:1 49 / 55 Petition 870250079686, dated 05 / 09 / 2025, pages 66 / 89 Total surfactant 15.15 15.15 15.15 15.15 12 12 Total taurate-based surfactant 8.55 8.55 8.55 8.55 9 6 Total zwitterionic surfactant 6.60 6.6 6.6 6.6 3 6 Total amphoteric surfactant 0 0 0 0 0 0 Total taurate:amphoteric / total zwitterionic ratio 1.3:1 1.3:1 1.3:1 1.3:1 3:1 1:1 Foam height, 0 gpg (cm) 7.8 8.0 8.0 8.0 8.6 8.6 Foam height, 25 gpg (cm) 2 3.5 2 3 0.1 0.1% drop 0 to 25 gpg 74 % 56 % 75 % 63 % 99 % 99 % 1. StarSurf™ CAPHS available alongside StarChem. 2. Mirataine® LHS available near Syensqo 3. Merquat™ 550 PR polymer available alongside Lubrizol 4. Hallstar® PEG 6000 DS by Hallstar 5. Hallstar® PEG 4400 MS MB by Hallstar 50 / 55 Petition 870250079686, dated 05 / 09 / 2025, pp. 67 / 89 51 / 55

[0074] As can be seen in Table 6, the comparative personal care compositions do not provide an acceptable amount of foam robustness. Examples / combinations 1. An aqueous composition for personal care, comprising: a) a detergent surfactant comprising an acyl taurate-based surfactant or a combination of an acyl taurate-based surfactant and N-alkyl acyl taurate; b) an amphoteric co-surfactant, wherein the ratio between the contaminant surfactant and the co-surfactant is from 0.5:1 to 2:1; and, c) water. 2. The personal care composition of paragraph 1, wherein the composition exhibits less than a 55% decrease in foam, preferably less than 30%, more preferably less than 20%, and most preferably less than 15%, according to the Foam Robustness Test. 3. The personal care composition of paragraph 1 or 2, in which the amphoteric surfactant is selected from alkyl amido propyl betaines, alkyl betaines, amphoacetates and combinations thereof. 4. The personal care composition of paragraph 3, in which the amphoteric surfactant is selected from cocamidopropyl betaine, lauramidyl propyl betaine, coco-betaine, lauryl betaine, cetyl betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, disodium lauroamphodiacetate, disodium cocoamphodiacetate and combinations thereof. Petition 870250079686, dated 05 / 09 / 2025, pages 68 / 89 52 / 55 5. The personal care composition of any preceding paragraph, additionally comprising an additional surfactant selected from nonionic surfactants, anionic surfactants and combinations thereof. 6. The personal care composition of any preceding paragraph, wherein the composition comprises a combination of acyl taurate and N-alkyl acyl taurate at a ratio of acyl taurate to N-alkyl acyl taurate by weight of 1:1 to 50:1, preferably 2:1 to 50:1 and more preferably 2:1 to 25:1. 7. The personal care composition of any preceding paragraph, wherein the acyl taurate-based surfactant is a C8-C24 acyl taurate-based surfactant, preferably selected from the group consisting of capric ester taurate surfactants, cocoyl taurate surfactants, lauroyl taurate surfactants, myristoyl taurate surfactants, caproyl taurate surfactants, oleoyl taurate surfactants, capryloyl taurate surfactants, palmitoyl taurate surfactants, stearoyl taurate surfactants, linoleoyl taurate surfactants, salts thereof and combinations thereof. 8. The personal care composition of any preceding paragraph, in which the N-alkyl acyl taurate surfactant is selected from methyl-substituted acyl taurates, ethyl-substituted acyl taurates, propyl-substituted acyl taurates, butyl-substituted acyl taurates, salts thereof and combinations thereof, preferably from the group consisting of methyl caprylic taurate ester, methyl cocoyl taurate, methyl lauroyl taurate, methyl myristoyl taurate, methyl caproyl Petition 870250079686, dated 05 / 09 / 2025, pages 69 / 89 53 / 55 taurate, methyl oleoyl taurate, methyl capryloyl taurate, methyl palmitoyl taurate, methyl stearoyl taurate, methyl linoleoyl taurate, salts thereof and combinations thereof. 9. The composition of any preceding paragraph, additionally comprising an additional ingredient selected from among deposition aids, conditioning agents, anti-dandruff agents, antimicrobial agents, suspending agents, viscosity modifiers, colorants, pigments, non-volatile solvents, diluents, pearlescent aids, foam enhancers, pH adjusting agents, perfumes, preservatives, chelating agents, proteins, vitamins, amino acids, skin actives, sunscreens, UV absorbers, stabilizers and combinations thereof, preferably an anti-dandruff agent selected from the group consisting of azoles, hydroxyl pyridones, zinc pyridone, zinc carbonate, piroctone olamine, piroctone, sulfur, ciclopirox, rilopirox, MEA hydroxy octyloxy pyridinone, salicylic acid, azoxystrobin, 1,10-phenanthroline and combinations thereof. 10. The composition, in accordance with any of the preceding paragraphs, in which the composition is free from sulfated surfactants. 11. The composition, according to any of the preceding paragraphs, further comprising from about 0.05% to about 3% of a cationic polymer having a weight-average molecular weight of about 50 kDa to about 5 MDa and a charge density of about 0.2 meq / g to about 2 meq / g. Petition 870250079686, dated 05 / 09 / 2025, pp. 70 / 89 54 / 55 12. The composition of any preceding paragraph, where the personal care composition is a shampoo, conditioner, or liquid body wash. 13. Use of personal care methods described in any previous paragraph to clean a body surface, which includes: a) Apply water to a target body surface where cleaning is desired, provided the water has a hardness value greater than 3 grains per gram of water according to the Water Hardness method; b) apply the composition from any preceding paragraph to the target body surface; and, c) Rinse the body surface composition with water. 14. The method described in paragraph 13, where the target body surface is hair or skin.

[0075] The dimensions and values ​​disclosed herein should not be understood as strictly limited to the exact numerical values ​​mentioned. Instead, except where otherwise specified, each of these dimensions is intended to mean both the value mentioned and a range of functionally equivalent values ​​around that value. For example, a dimension disclosed as 40 mm is intended to mean approximately 40 mm.

[0076] Every document cited in the present invention, including any related cross-references, patents or applications, is incorporated herein by reference in its entirety, unless expressly excluded or otherwise limited. Mention of any document is not an admission that it constitutes prior art in relation to Petition 870250079686, dated 05 / 09 / 2025, pp. 71 / 89 55 / 55 any invention disclosed or claimed in this document, nor does it, by itself or in any combination with any other reference or references, teach, suggest or disclose such invention. Additionally, if there is a conflict between any meaning or definition of a term in this document and 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 prevail.

[0077] Although specific embodiments of the present invention have been illustrated and described, it will be evident to those skilled in the art that various other alterations and modifications can be made without departing from the spirit and scope of the invention. Therefore, it is intended to cover in the appended claims all such alterations and modifications that are within the scope of the present invention. Petition 870250079686, dated 05 / 09 / 2025, pp. 72 / 89

Claims

1 / 4 CLAIMS 1. Aqueous composition for personal care, characterized by comprising: a) a detergent surfactant comprising an acyl taurate surfactant or a combination of an acyl taurate and an N-alkyl acyl taurate surfactant; a) an amphoteric co-surfactant, wherein the ratio between detergent surfactant and co-surfactant is from 0.5:1 to 2:1; and b) water.

2. Personal care composition, according to claim 1, characterized by having less than 55% foam reduction, preferably less than 30%, more preferably less than 20%, and even more preferably less than 15%, according to the Foam Robustness Test.

3. Personal care composition according to claim 1 or 2, characterized in that the amphoteric surfactant is selected from alkylamidopropyl betaines, alkyl betaines, amphoacetates and combinations thereof.

4. Personal care composition according to claim 3, characterized in that the amphoteric surfactant is selected from cocamidopropyl betaine, lauramidopropyl betaine, coco-betaine, lauryl betaine, cetyl betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, disodium lauroamphodiacetate, disodium cocoamphodiacetate and combinations thereof.

5. Personal care composition, according to any of the preceding claims, characterized Petition 870260021931, dated 10 / 03 / 2026, page 5 / 16 2 / 4 by further comprising an additional surfactant selected from non-ionic surfactants, anionic surfactants and combinations thereof.

6. A composition for personal care, according to any of the preceding claims, characterized by comprising a combination of acyl taurate and N-acyl alkyl taurate in a weight ratio of acyl taurate to N-alkyl acyl taurate of 1:1 to 50:1, preferably 2:1 to 50:1 and more preferably 2:1 to 25:

1.

7. Personal care composition, according to any of the preceding claims, characterized in that the acyl taurate surfactant is a C8-C24 acyl taurate surfactant, preferably selected from the group consisting of capric ester taurate surfactants, cocoyl taurate surfactants, lauroyl taurate surfactants, myristoyl taurate surfactants, caproyl taurate surfactants, oleoyl taurate surfactants, capryloyl taurate surfactants, palmitoyl taurate surfactants, stearoyl taurate surfactants, linoleoyl taurate surfactants, salts thereof and combinations thereof.

8. Personal care composition, according to any of the preceding claims, characterized in that the N-alkyl acyl taurate surfactant is selected from methyl-substituted acyl taurates, ethyl-substituted acetyl taurates, propyl-substituted acyl taurates, butyl-substituted acyl taurates, salts thereof and combinations thereof, preferably from the group consisting of caprylic ester. Petition 870260021931, dated 10 / 03 / 2026, p. 6 / 16 3 / 4 of methyl taurate, cocoyl methyl taurate, lauroyl methyl taurate, myristoyl methyl taurate, caproyl methyl taurate, oleoyl methyl taurate, capryloyl methyl taurate, palmitoyl methyl taurate, stearoyl methyl taurate, linoleoyl methyl taurate, salts thereof and combinations thereof.

9. A composition for personal care, according to any of the preceding claims, characterized by further comprising an additional ingredient selected from among deposition aids, conditioning agents, anti-dandruff agents, antimicrobial agents, suspending agents, viscosity modifiers, colorants, pigments, non-volatile solvents, diluents, pearlescent aids, foam enhancers, pH adjusting agents, perfumes, preservatives, chelating agents, proteins, vitamins, amino acids, skin-active agents, sunscreens, UV absorbers, stabilizers and combinations thereof, preferably an anti-dandruff agent selected from the group consisting of azoles, hydroxyl pyridones, zinc pyridone, zinc carbonate, piroctone olamine, piroctone, sulfur, ciclopirox, rilopirox, MEA hydroxy-octyloxypyridinone, salicylic acid, azoxystrobin, 1,10-phenanthroline and combinations thereof.

10. Personal care composition, according to any of the preceding claims, characterized by being substantially free of sulfated surfactants.

11. Composition for personal care, according to any of the preceding claims, characterized by further comprising about 0.05% to about 3% of a cationic polymer having a weight-average molecular weight of about 50 kDa to about 5 MDa and a charge density of about 0.2 mEq / g to about 12 mEq / g.

12. Personal care composition, according to any of the preceding claims, characterized in that the personal care composition is a shampoo, conditioner or liquid body soap.

13. Use of the composition for personal care, as defined in any of the preceding claims, characterized by being for cleaning a body surface, comprising: a) applying water to a target body surface where cleaning is desired, wherein the water has a hardness value greater than 3 grains per gram of water, according to the Water Hardness method; b) applying the composition, as defined in any of the preceding claims, to the target body surface; and c) rinsing the composition from the body surface with water.

14. Use, according to claim 13, characterized in that the target body surface is hair or skin. Petition 870260021931, dated 10 / 03 / 2026, page 8 / 16