Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/41—Amines
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
  • A61K8/463—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfuric acid derivatives, e.g. sodium lauryl sulfate
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/002—Preparations for repairing the hair, e.g. hair cure
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/02—Preparations for cleaning the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/51—Chelating agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/59—Mixtures
  • A61K2800/592—Mixtures of compounds complementing their respective functions
  • A61K2800/5922—At least two compounds being classified in the same subclass of A61K8/18
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/59—Mixtures
  • A61K2800/596—Mixtures of surface active compounds

Definitions

• Described herein are shampoo compositions comprising a detersive surfactant, a chelant, and a carrier, wherein the shampoo composition inhibits both deposition/penetration of copper salts and other transition metal salts in the hair and removes such salts from hair fiber.
• a method of cleansing hair with such shampoo compositions is also described herein.
• Described herein is a shampoo composition
• a shampoo composition comprising:
• fluid includes liquids and gels.
• log x refers to the common (or decadic) logarithm of x.
• mixtures is meant to include a simple combination of materials and any compounds that may result from their combination.
• component or composition levels are in reference to the active portion of that component or composition, and are exclusive of impurities, for example, residual solvents or by-products, which may be present in commercially available sources of such components or compositions.
• compositions, methods, uses, kits, and processes of the shampoo composition described herein can comprise, consist of, and consist essentially of the elements and limitations of the invention described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.
• the terms “include,” “includes,” and “including,” are meant to be non-limiting and are understood to mean “comprise,” “comprises,” and “comprising,” respectively.
• substantially free from or “substantially free of” as used herein means less than about 1%, or less than about 0.8%, or less than about 0.5%, or less than about 0.3%, or about 0%, by total weight of the composition.
• “Hair,” as used herein, means mammalian hair including scalp hair, facial hair and body hair, particularly on hair on the human head and scalp.
• Cosmetically acceptable means that the compositions, formulations or components described are suitable for use in contact with human keratinous tissue without undue toxicity, incompatibility, instability, allergic response, and the like. All compositions described herein which have the purpose of being directly applied to keratinous tissue are limited to those being cosmetically acceptable.
• Derivatives includes but is not limited to, amide, ether, ester, amino, carboxyl, acetyl, acid, and/or alcohol derivatives of a given compound.
• Polymer means a chemical formed from the polymerisation of two or more monomers, which may be the same or different.
• the term “polymer” as used herein shall include all materials made by the polymerisation of monomers as well as natural polymers. Polymers made from only one type of monomer are called homopolymers. A polymer comprises at least two monomers. Polymers made from two or more different types of monomers are called copolymers. The distribution of the different monomers can be calculated statistically or block-wise—both possibilities are suitable for the shampoo composition. Except if stated otherwise, the term “polymer” used herein includes any type of polymer including homopolymers and copolymers.
• charge density means the ratio of the number of positive charges on a monomeric unit of which a polymer is comprised to the M.Wt. of said monomeric unit. The charge density multiplied by the polymer M.Wt. determines the number of positively charged sites on a given polymer chain.
• charge density is measured using standard elemental analysis of percentage nitrogen known to one skilled in the art. This value of percentage nitrogen, corrected for total protein analysis, can then be used to calculate the number or equivalence of positive charges per gram of polymer.
• the charge density is a function of the monomers used in the synthesis.
• Standard NMR techniques know to one skilled in the art would be used to confirm that ratio of cationic and non-ionic monomers in the polymer. This would then be used to calculate the number or equivalence of positive charges per gram of polymer. Once these values are know, the charge density is reported in milliequivalence (meq) per gram of cationic polymer.
• log P is the n-octanol/water partition coefficients of the material.
• component or composition levels are in reference to the active portion of that component or composition, and are exclusive of impurities, for example, residual solvents or by-products, which may be present in commercially available sources of such components or compositions.
• a shampoo composition comprising (a) from about 0.005% to about 5% of one or more chelants; (b) from about 2% to about 50% of one or more detersive surfactants, by weight of the shampoo composition; (c) from about 75% to about 98% of an aqueous carrier, by weight of the shampoo composition, wherein the shampoo composition has a pH of about 3 to about 8, and wherein the shampoo inhibits copper deposition on hair and facilitates the removal of copper deposited on hair.
• the shampoo composition also delivers consumer desired shampooing in addition to inhibiting the deposition of copper (i.e. from the water used to rinse) on the hair.
• the shampoo composition comprises from about 0.005% to about 5%, alternatively from about 0.01% to about 3%, alternatively from about 0.01% to about 1%, alternatively from about 0.01% to about 0.5%, alternatively from about 0.01% to about 0.1%, and alternatively from about 0.025% to about 0.05% of one or more chelants by weight of the shampoo composition, wherein the one or more chelants have a molecular structure as follows:
• the relative affinity of a chelant at a specified pH for Cu +2 can be assessed by its Stability Constant.
• the Stability Constant of a metal chelant interaction is defined as:
• [ML] is the concentration of metal ligand complex at equilibrium
• [M] is the concentration of free metal ion
• [L] is the concentration of free ligand in a fully deprotonated form
• K ML is the stability constant for the metal chelant complex.
• the one or more chelants for use in the shampoo composition may be selected from the group consisting of triethylenetetramine, tetraethylenepenatmine, pentaethylenehexamine, tris(2-aminoethyl)amine, ethylenedinitrilotetrapropan-2-ol, 1,1′,1′′-[[2-hydroxypropyl)imino]bis(2,1-ethanediylnitrilo)]tetrakis-2-propanol, tetraethylenepentaamine-(1-EO), 1,5,9,13-tetraazatridecane, and mixtures thereof.
• Table 1 provides relevant properties and performance of the one or more copper chelants described herein. Details on determination of copper removing performance is described in the Examples section.
• the log of the formation constant log K ML of its complex with copper can be higher than 6, alternatively higher than 8, alternatively higher than 9, alternatively higher than 10, alternatively higher than 12, alternatively higher than 14, alternatively higher than 16, alternatively higher than 17, alternatively higher than 18, and alternatively higher than 20.
• the log of the formation constant log K ML of its complex with copper can be from about 6 to about 28, alternatively from about 8 to about 27, alternatively from about 9 to about 26, alternatively from about 10 to about 25, alternatively from about 12 to about 24, alternatively from about 14 to about 24, alternatively from about 16 to about 24, alternatively from about 17 to about 24, alternatively from about 18 to about 24, and alternatively from about 20 to about 23.
• the log P value of the one or more chelants can be from about ⁇ 5 to about 2, alternatively from about ⁇ 4 to about 1, alternatively from about ⁇ 3.5 to about 0, and alternatively from about ⁇ 2.9 to about ⁇ 2.5.
• the molecular weight of the one or more chelants can be from about 50 to about 500, alternatively from about 75 to about 400, alternatively from about 100 to about 350, alternatively from about 125 to about 325, alternatively from about 140 to about 300, alternatively from about 140 to about 200.
• the copper removing performance of the shampoo composition is determined by treating hair with clarifying shampoo containing the corresponding chelant for 20 cycles and comparing the copper content of the hair compared to the same treatment using shampoo without the chelant.
• chelants that can be used to reduce copper content of hair have the following general structure:
• M is hydrogen or a metal ion; p is 1 or 2; q is 1 or 2; and X is selected from the group containing hydrogen, methyl, ethyl, propyl, —CH 2 CH 2 OH, —CH 2 CH(CH 3 )OH), —CH 2 CH 2 NH 2 , —CH 2 CH(CH 3 )NH 2 , —CH 2 COOM, or —CH 2 CH 2 SH, and —CH 2 CH(CH 3 )SH).
• Non-limiting examples include iminodiacetic acid, N-(2-hydroxyethyl)iminodiacetic acid, N-methyliminodiacetic acid, N-(2-aminoethyl)iminodiacetic acid, N-propyliminodiacetic acid, and nitrilotriacetic acid.
• the shampoo composition comprises from about 2% to about 50%, alternatively from about 5% to about 25%, alternatively from about 7% to about 22%, alternatively from about 9% to about 18%, and alternatively from about 11% to about 15% of one or more detersive surfactants by weight of the shampoo composition.
• concentration of the detersive surfactant component in the shampoo composition should be sufficient to provide the desired cleaning and lather performance.
• the one or more detersive surfactants can be selected from the group consisting of anionic surfactants, amphoteric or zwitterionic surfactants, or mixtures thereof.
• the one or more detersive surfactants can also be selected from the group consisting of anionic surfactants, cationic surfactants, non-ionic surfactants, amphoteric surfactants, and mixtures thereof.
• detersive surfactants are set forth in U.S. Pat. No. 6,649,155; U.S. Patent Application Publication No. 2008/0317698; and U.S. Patent Application Publication No. 2008/0206355, which are incorporated herein by reference in their entirety.
• Anionic surfactants suitable for use in the compositions are the alkyl and alkyl ether sulfates.
• Other suitable anionic surfactants are the water-soluble salts of organic, sulfuric acid reaction products.
• Still other suitable anionic surfactants are the reaction products of fatty acids esterified with isethionic acid and neutralized with sodium hydroxide.
• Other similar anionic surfactants are described in U.S. Pat. Nos. 2,486,921; 2,486,922; and 2,396,278, which are incorporated herein by reference in their entirety.
• Exemplary anionic surfactants for use in the shampoo composition include ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauric monoglyceride sodium sulfate, sodium lauryl sulfate, sodium laureth sulfate, potassium lauryl sulfate, potassium laureth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, lauryl sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, ammonium la
• Suitable amphoteric or zwitterionic surfactants for use in the shampoo composition include those which are known for use in shampoo or other personal care cleansing. Concentrations of such amphoteric surfactants range from about 0.5 wt % to about 20 wt %, and from about 1 wt % to about 10 wt %. Non limiting examples of suitable zwitterionic or amphoteric surfactants are described in U.S. Pat. Nos. 5,104,646 and 5,106,609, which are incorporated herein by reference in their entirety.
• Amphoteric detersive surfactants suitable for use in the shampoo composition include those surfactants broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight or branched chain and wherein 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.
• Exemplary amphoteric detersive surfactants for use in the present shampoo composition include cocoamphoacetate, cocoamphodiacetate, lauroamphoacetate, lauroamphodiacetate, and mixtures thereof.
• Zwitterionic detersive surfactants suitable for use in the shampoo composition include those surfactants broadly described as derivatives of aliphatic quaternaryammonium, phosphonium, and sulfonium compounds, in which the aliphatic radicals can be straight or branched chain, and wherein 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.
• zwitterionics such as betaines are selected.
• Non limiting examples of other anionic, zwitterionic, amphoteric or optional additional surfactants suitable for use in the shampoo composition are described in McCutcheon's, Emulsifiers and Detergents, 1989 Annual, published by M. C. Publishing Co., and U.S. Pat. Nos. 3,929,678, 2,658,072; 2,438,091; 2,528,378, which are incorporated herein by reference in their entirety.
• the shampoo composition may also comprise a cationic conditioning polymer, an aqueous carrier, and other additional ingredients described herein.
• the shampoo composition described herein may comprise one or more cationic conditioning polymers.
• This polymer may be selected from the group consisting of (a) a cationic guar polymer, (b) a cationic non-guar polymer, (c) a cationic tapioca polymer, (d) a cationic copolymer of acrylamide monomers and cationic monomers, (e) a synthetic, non-crosslinked, cationic polymer, which forms lyotropic liquid crystals upon combination with the detersive surfactant, and (f) mixtures thereof.
• the shampoo composition further comprises from about 75% to about 98%, alternatively from about 80% to about 98% of a cosmetically acceptable carrier, by weight of the shampoo composition.
• the carrier can be an aqueous carrier.
• the amount and chemistry of the carrier is selected according to the compatibility with other components and other desired characteristic of the product.
• the carrier is selected from the group consisting of: water and water solutions of lower alkyl alcohols.
• Lower alkyl alcohols useful herein are monohydric alcohols having 1 to 6 carbons, such as ethanol and/or isopropanol.
• the cosmetically acceptable carrier is a cosmetically acceptable aqueous carrier and is present at a level of from about 20% to about 95%, or from about 60% to about 85%.
• the pH of the shampoo composition can be from about pH 3 to about pH 8, alternatively from about pH 4 to about pH 7, and alternatively from about pH 5 to about pH 6.
• the shampoo composition may further comprise one or more benefit agents.
• benefit agents include, but are not limited to, silicone emulsions, anti-dandruff actives, perfume microcapsules, gel networks, colorants, particles, and other insoluble skin or hair conditioning agents such as skin silicones, natural oils such as sun flower oil or castor oil.
• silicone emulsions suitable for use herein include emulsions of insoluble polysiloxanes prepared in accordance with the descriptions provided in U.S. Pat. No. 4,476,282 and U.S. Patent Application Publication No. 2007/0276087. Accordingly, insoluble polysiloxanes referred to herein for the purpose of the invention include polysiloxanes such as alpha, omega hydroxy-terminated polysiloxanes or alpha, omega alkoxy-terminated polysiloxanes having a molecular weight within the range from about 50,000 to about 500,000 g/mol.
• insoluble polysiloxane means that the water solubility of the polysiloxane is less than 0.05 wt %. In another embodiment, the water solubility of the polysiloxane is less than 0.02 wt %, or less than 0.01 wt %, or less than 0.001 wt %. According to an embodiment, the insoluble polysiloxane is present in the shampoo composition in an amount within the range from about 0.1 wt % to about 3 wt %, based on the total weight of the composition.
• the insoluble polysiloxane can be present in an amount within the range from about 0.2 wt % to about 2.5 wt %, or from about 0.4 wt % to about 2.0 wt %, or from about 0.5 wt % to about 1.5 wt %, based on the total weight of the composition.
• the insoluble polysiloxane used herein include alpha, omega hydroxy- or alkoxy-terminated polysiloxanes having a general formula I:
• n is an integer
• R is a substituted or unsubstituted C 1 to C 10 alkyl or aryl
• R 1 is a hydrogen or a substituted or unsubstituted C 1 to C 10 alkyl or aryl.
• R and R 1 may be independently selected from alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, tertpentyl, hexyl such as n-hexyl, heptyl such as n-heptyl, octyl such as n-octyl and isooctyl such as 2,2,4-trimethyl-pentyl, nonyl such as n-nonyl, decyl such as n-decyl, dodecyl such as n-dodecyl, octadecyl such as n-octadecyl; or aryl groups such as phenyl, naphthyl, anthryl and phenanthryl
• the insoluble polysiloxane has an average molecular weight within the range from about 50,000 to about 500,000 g/mol.
• the insoluble polysiloxane may have an average molecular weight within the range from about 60,000 to about 400,000; from about 75,000 to about 300,000; from about 100,000 to about 200,000; or the average molecular weight may be about 150,000 g/mol.
• dimethiconol may include significant quantities of cyclic polysiloxanes, such as octamethylcyclotetrasiloxane (D4) and decamethylcyclotetrasiloxane (D5).
• the amount of D4 is less than about 2.0%, or less than about 1.5%, or less than about 1.0%, or less than about 0.5%, based on the total weight of all polysiloxanes.
• the amount of D5 is less than about 0.5%, or less than about 0.4%, or less than about 0.3%, or less than about 0.2%, based on the total weight of all polysiloxanes.
• the emulsion has a viscosity up to about 500,000 cPs.
• the viscosity may be within the range from about 75,000 to about 300,000, from about 100,000 to about 200,000, or about 150,000 cPs.
• the insoluble polysiloxane has an average particle size within the range from about 30 nm to about 10 micron.
• the average particle size may be within the range from about 40 nm to about 5 micron, from about 50 nm to about 1 micron, from about 75 nm to about 500 nm, or about 100 nm, for example.
• the average molecular weight of the insoluble polysiloxane, the viscosity of the silicone emulsion, and the size of the particle comprising the insoluble polysiloxane are determined by methods commonly used by those skilled in the art, such as the methods disclosed in Smith, A. L. The Analytical Chemistry of Silicones , John Wiley & Sons, Inc.: New York, 1991.
• the viscosity of the silicone emulsion can be measured at 30° C. with a Brookfield viscosimeter with spindle 6 at 2.5 rpm.
• the emulsion further includes an anionic surfactant that participates in providing high internal phase viscosity emulsions having particle sizes in the range from about 30 nm to about 10 micron.
• the anionic surfactant is selected from organic sulfonic acids. Most common sulfonic acids used in the present process are alkylaryl sulfonic acid; alkylaryl polyoxyethylene sulphonic acid; alkyl sulfonic acid; and alkyl polyoxyethylene sulfonic acid. General formulas of the sulfonic acids are as shown below:
• R 2 which may differ, is a monovalent hydrocarbon radical having at least 6 carbon atoms.
• R 2 include hexyl, octyl, decyl, dodecyl, cetyl, stearyl, myristyl, and oleyl.
• ‘m’ is an integer from 1 to 25.
• anionic surfactants include but are not limited to octylbenzene sulfonic acid; dodecylbenzene sulfonic acid; cetylbenzene sulfonic acid; alpha-octyl sulfonic acid; alpha-dodecyl sulfonic acid; alpha-cetyl sulfonic acid; polyoxyethylene octylbenzene sulfonic acid; polyoxyethylene dodecylbenzene sulfonic acid; polyoxyethylene cetylbenzene sulfonic acid; polyoxyethylene octyl sulfonic acid; polyoxyethylene dodecyl sulfonic acid; and polyoxyethylene cetyl sulfonic acid.
• 1 to 15% anionic surfactant is used in the emulsion process.
• 3-10% anionic surfactant can be used to obtain an optimum result.
• the silicone emulsion may further include an additional emulsifier together with the anionic surfactant, which along with the controlled temperature of emulsification and polymerization, facilitates making the emulsion in a simple and faster way.
• Non-ionic emulsifiers having a hydrophilic lipophilic balance (HLB) value of 10 to 19 are suitable and include polyoxyalkylene alkyl ether, polyoxyalkylene alkylphenyl ethers and polyoxyalkylene sorbitan esters.
• Some useful emulsifiers having an HLB value of 10 to 19 include, but are not limited to, polyethylene glycol octyl ether; polyethylene glycol lauryl ether; polyethylene glycol tridecyl ether; polyethylene glycol cetyl ether; polyethylene glycol stearyl ether; polyethylene glycol nonylphenyl ether; polyethylene glycol dodecylphenyl ether; polyethylene glycol cetylphenyl ether; polyethylene glycol stearylphenyl ether; polyethylene glycol sorbitan monostearate; and polyethylene glycol sorbitan monooleate.
• composition may further comprise an anti-dandruff active, which may be an anti-dandruff active particulate.
• the shampoo composition can also additionally comprise any suitable optional ingredients as desired.
• optional ingredients should be physically and chemically compatible with the components of the composition, and should not otherwise unduly impair product stability, aesthetics, or performance.
• CTFA Cosmetic Ingredient Handbook Tenth Edition (published by the Cosmetic, Toiletry, and Fragrance Association, Inc., Washington, D.C.) (2004) (hereinafter “CTFA”), describes a wide variety of nonlimiting materials that can be added to the composition herein.
• a method of making a shampoo composition comprising a detersive surfactant, a cationic conditioning polymer, a chelant, and a carrier.
• the method includes (i) combining the detersive surfactant and the cationic conditioning polymer in suitable carrier, and (ii) combining a chelant and a carrier composition that includes a product of step (i) to form the shampoo composition.
• the shampoo composition has a viscosity of 4,000 cP to 20,000 cP, or from about 6,000 cP to about 12,000 cP, or from about 8,000 cP to about 11,000 cP, measured at 26.6° C. with a Brookfield R/S Plus Rheometer at 2 s ⁇ 1 .
• cP means centipoises.
• Also described herein is a method of inhibiting copper deposition on hair and facilitating the removal of copper deposited on hair comprising applying to the hair a shampomo composition described herein and rinsing the shampoo composition from the hair.
• Inhibition of copper deposition on hair and facilitation of the removal of copper deposited on hair may also be achieved by applying a leave-on treatment to the hair after rinsing the conditioner from the hair.
• the leave-on treatment may deliver consumer desired conditioning in addition to inhibiting the deposition of copper (i.e. from the water used to rinse) on the hair.
• the leave-on treatment described herein may comprise from about 0.025% to about 0.50%, alternatively from about 0.05% to about 0.25% of one or more chelants described herein, by weight of the leave-on treatment.
• the leave-on treatment may also comprise one or more rheology modifiers and an aqueous carrier.
• the shampoo composition can be prepared by conventional formulation and mixing techniques. It will be appreciated that other modifications of the shampoo composition within the skill of those in the hair care formulation art can be undertaken without departing from the spirit and scope of this invention. All parts, percentages, and ratios herein are by weight unless otherwise specified. Some components may come from suppliers as dilute solutions. The amount stated reflects the weight percent of the active material, unless otherwise specified.
• All testing are performed on colored hair switches (see Method of Measurement of Copper on Hair below) weighing approximately 4.0 grams and having a length of approximately 6 inches.
• the hair switches are commercially available from IHIP (International Hair Importers).
• Three hair switches per shampoo composition are used. An amount of 0.20 g of shampoo is spread via a syringe onto separate hair switch. That is, the dosage is 0.10 g of shampoo per g of hair.
• Each application consists of adding shampoo to the hair, milking for 30 seconds followed by rinsing for 30 seconds. Shampoo is then reapplied (0.1 g/g), milked for 30 seconds and rinsed for 30 seconds.
• test method is used to assess the ability of the compositions and regimens to remove copper from the hair and to inhibit copper deposition onto the hair.
• Hair switches are colored once with an oxidative hair colorant. An extra blonde shade is used for the testing.
• the hair switches are washed for 10 or 20 repeat wash cycles in tap water containing 7 grains per gallon water hardness (Ca/Mg) and 0.06 ⁇ g/g copper ions.
• Each wash cycle consists of two applications of 0.1 g/g a shampoo to the hair switches.
• Each application consists of adding shampoo to the hair, milking for 30 secs followed by rinsing for 30 secs.
• Shampoo is then reapplied 0.1 g/g, milked for 30 secs, rinsed for 30 secs and then dried in a heat box (60° C.) until dry.
• Samples of 100 mg of hair are digested overnight with 2 ml of high purity concentrated nitric acid.
• the digestive mixture also contains 150 ⁇ L of 100 ⁇ g/g Yttrium internal standard (Inorganic Ventures, Christianburg, Va., USA).
• samples are heated to 70-80° C. for one hour, cooled to room temperature and diluted to 15 mL with deionized water.
• Copper content of the hair switches is determined by inductively coupled plasma atomic spectroscopy (ICP-OES)). For each leg, 3 different samples are analyzed.
• the shampoo composition described herein is generally prepared by conventional methods. Such methods typically involve mixing of the ingredients in one or more steps to a relatively uniform state, with or without heating, cooling, application of vacuum, and the like.
• the compositions are prepared such as to optimize stability (physical stability, chemical stability, photostability) and/or delivery of the active materials.
• the shampoo composition may be in a single phase or a single product, or the shampoo composition may be in a separate phases or separate products. If two products are used, the products may be used together, at the same time, or sequentially. Sequential use may occur in a short period of time, such as immediately after the use of one product, or it may occur over a period of hours or days.
• Control Ex. 2 Components Wt % Wt % Sodium Laureth-1 Sulfate 1 10.50 10.50 Sodium Lauryl Sulfate 2 1.50 1.50 Cocamidopropyl betaine 1.00 1.00 Sodium benzoate 0.25 0.25 Citric Acid 0.70 0.70 Methylchloroisothiazolinone/ 0.0005 0.0005 Methylisothiazolinone 3 Sodium chloride 1.00 1.00 Tetrasodium EDTA dihydrate 0.16 0.16 2,3-Triethylenetetramine (TETA) 0.00 0.10 Deionized water Q.S. Q.S.
• Chelant 2,3-Triethylenetetramine contributes to significant reduction of copper content on hair after 10 shampoo cycle treatments compared to treatment with shampoo composition that does not comprise the chelant.
• 2,3-Triethylenetetramine acid contributes to an effective removal of copper from hair after 20 shampoo cycles both at low and a higher pH value. Without the chelant, lower pH shows higher copper removal from hair.
• ethylenedinitrilotetrapropan-2-ol acid contributes to an effective removal of copper from hair after 20 shampoo cycles compared to the corresponding treatment with control shampoo that does not contain the chelant.
• tris-2-aminoethylamine acid contributes to an effective removal of copper from hair after 10 shampoo cycles compared to the corresponding treatment with control clarifying shampoo that does not contain the chelant.
• composition of Ex.16 Ex.17 Ex.18 Summary Control Clarifying Clarifying shampoo Clarifying shampoo Description of shampoo with simple with simple with simple surfactant, Composition surfactant and surfactant, a a Rheology Modifier Rheology Modifier Rheology Modifier and a chelant and a chelant Concentration of 0.00% 0.10% 0.10% Chelant in Shampoo Chelant used — Iminodiacetic acid N-(2- hydroxyethyl)iminodiacetic acid Shampoo pH 6.0 6.0 6.0 Shampoo cycles 20 20 20 Average final copper 84 51 56 concentration in hair (ppm) Standard deviation 6.5 2.7 1.7 Relative content of 100 61 67 Copper content on hair after treatment (versus control shampoo treatment)
• chelants having 2-aminodiacetic acid molecular structures contributes to an effective removal of copper from hair after 20 shampoo cycles compared to the corresponding treatment with control clarifying shampoo that does not contain the chelant.
• Control Ex. 21 Components Wt % Wt % Sodium Laureth-3 Sulfate 1 6.00 6.00 Sodium Lauryl Sulfate 2 9.50 9.50 Cocamidopropyl betaine 1.88 1.88 Tetrasodium EDTA dehydrate 0.16 0.16 Citric Acid (Anhydrous) 0.28 0.28 Sodium benzoate 0.25 0.25 Methylchloroisothiazolinone/ 0.0005 0.0005 Methylisothiazolinone 3 Sodium chloride 0.57 0.57 Hydroxypropylmethylcellulose 0.25 0.25 2,3-Triethylenetetramine (TETA) 0.0 0.10 Perfume 0.40 0.40 Distilled Water Q.S. Q.S.
• Each treatment includes cleaning with conditioning shampoo followed by a rinse-off conditioner, followed by a leave-on treatment spray (when indicated).
• Treatment v. Treatment v. Treatment AM content on hair AM AM after treatment (versus control shampoo treatment) Shampoo Ex. 21 Ex. 19(a) Ex. 23 Ex. 22
• Addition of 2,3-Triethylenetetramine in any of the products of the regimen contributes to an effective removal of copper from hair after 20 conditioning shampoo/rinse-off conditioner/leave-on treatment regimen cycles compared to the corresponding treatment with control conditioning shampoo/control rinse-off conditioner.
• the regimen where the chelant is added in the leave-on treatment is particularly effective in removing copper form hair.

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• 2017
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