Patent Application
20240293303
The present invention relates to a hair conditioning formulation. In particular, the present invention relates to a hair conditioning formulation containing: a dermatologically acceptable vehicle; and a conditioning polymer, wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons.
Conventional hair conditioners are popular with consumers for treating hair. Silicone based conditioning agents are the most commonly used conditioning agents in hair conditioning formulations. However, there are growing concerns among some consumers regarding the persistence and potential toxicity of certain silicone based conditioning agents in the environment, particularly for D4 and D5 conditioners. Accordingly, there has been a growing interest in the development of silicone-free alternative conditioning agents for use in hair conditioning formulations.
In U.S. Pat. No. 5,879,670, Melby et al disclose a non-silicon containing ampholyte polymer for use as a conditioning agent for treatment of a keratin-containing substrate. In particular, Melby et al disclose novel conditioning polymer containing (meth)acrylamidopropyltrimethyl ammonium chloride, meth(acrylic acid) or 2-(meth)acrylamido-2-methylpropane sulfonic acid and, optionally, a C1-22 alkyl (meth)acrylate and the use thereof in a cosmetically acceptable medium for the treatment of a keratin-containing substrate.
Notwithstanding, there is a continuing need for new hair conditioning agents that provide conditioning benefits. There is also a continuing need for new hair conditioning agents having an increased natural origin index (ISO16128) when compared with conventional hair conditioning agents.
The present invention provides a hair conditioning formulation, comprising: a dermatologically acceptable vehicle; and a conditioning polymer, wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons.
The present invention provides a hair conditioning formulation, comprising: a dermatologically acceptable vehicle; and a conditioning polymer, wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons; and wherein the tertiary amine groups are of formula (A) bound to a pendent oxygen on the branched chain dextran polymer
wherein
is a pendant oxygen on the branched chain dextran polymer; wherein X is a divalent linking group bonding the tertiary amine moiety to the pendent oxygen on the dextran polymer; wherein z is 0 or 1; and wherein R2 and R3 are independently selected from the group consisting of a C1-7 alkyl group.
The present invention provides a method of conditioning mammalian hair, comprising: selecting a hair conditioning formulation of the present invention; and applying the hair conditioning formulation to mammalian hair.
We have surprisingly found that a dextran polymer functionalized with tertiary amine groups acts as a conditioning polymer that effectively restores hydrophobicity to damaged hair and reduces the force required to comb treated hair.
Unless otherwise indicated, ratios, percentages, parts, and the like are by weight.
As used herein, unless otherwise indicated, the phrase “molecular weight” or Mw refers to the weight average molecular weight as measured in a conventional manner with gel permeation chromatography (GPC) and conventional standards, such as polyethylene glycol standards. GPC techniques are discussed in detail in Modern Size Exclusion Chromatography, W. W. Yau, J. J. Kirkland, D. D. Bly; Wiley-Interscience, 1979, and in A Guide to Materials Characterization and Chemical Analysis, J. P. Sibilia; VCH, 1988, p. 81-84. Molecular weights are reported herein in units of Daltons, or equivalently, g/mol.
The term “dermatologically acceptable” as used herein and in the appended refers to ingredients that are typically used for topical application to the skin, and is intended to underscore that materials that are toxic when present in the amounts typically found in skin care compositions are not contemplated as part of the present invention.
Preferably, the hair conditioning formulation of the present invention is selected from the group consisting of a conditioning shampoo formulation, a rinse off conditioner formulation and a leave on conditioner formulation. More preferably, the hair conditioning formulation of the present invention is selected from the group consisting of a rinse off conditioner formulation and a leave on conditioner formulation. Most preferably, the hair conditioning formulation of the present invention is a rinse off conditioner formulation.
Preferably, the hair conditioning formulation of the present invention, comprises: a dermatologically acceptable vehicle (preferably, wherein the hair conditioning formulation comprises 50 to 99.9 wt % (preferably, 75 to 99.85 wt %; more preferably, 80 to 99.8 wt %; most preferably, 90 to 99.75 wt %), based on weight of the hair conditioning formulation, of a dermatologically acceptable vehicle); and a conditioning polymer (preferably, wherein the hair conditioning formulation comprises 0.1 to 1 wt % (preferably, 0.15 to 0.75 wt %; more preferably, 0.2 to 0.5 wt %; most preferably, 0.25 to 0.4 wt %), based on weight of the hair conditioning formulation, of the conditioning polymer); wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons.
Preferably, the hair conditioning formulation of the present invention is a liquid formulation. More preferably, the hair conditioning formulation of the present invention is an aqueous liquid formulation.
Preferably, the hair conditioning formulation of the present invention, comprises: 50 to 99.9 wt % (preferably, 75 to 99.85 wt %; more preferably, 80 to 99.8 wt %; most preferably, 90 to 99.75 wt %), based on weight of the hair conditioning formulation, of a dermatologically acceptable vehicle. More preferably, the hair conditioning formulation of the present invention, comprises: 50 to 99.9 wt % (preferably, 75 to 99.85 wt %; more preferably, 80 to 99.8 wt %; most preferably, 90 to 99.75 wt %), based on weight of the hair conditioning formulation, of a dermatologically acceptable vehicle; wherein the dermatologically acceptable vehicle comprises water. Still more preferably, the hair conditioning formulation of the present invention, comprises: 50 to 99.9 wt % (preferably, 75 to 99.85 wt %; more preferably, 80 to 99.8 wt %; most preferably, 90 to 99.75 wt %), based on weight of the hair conditioning formulation, of a dermatologically acceptable vehicle; wherein the dermatologically acceptable vehicle is selected from the group consisting of water and an aqueous C1-4 alcohol mixture. Most preferably, the hair conditioning formulation of the present invention, comprises: 50 to 99.9 wt % (preferably, 75 to 99.85 wt %; more preferably, 80 to 99.8 wt %; most preferably, 90 to 99.75 wt %), based on weight of the hair conditioning formulation, of a dermatologically acceptable vehicle; wherein the dermatologically acceptable vehicle is water.
Preferably, the water used in the hair conditioning formulation of the present invention is at least one of distilled water and deionized water. More preferably, the water used in the hair conditioning formulation of the present invention is distilled and deionized.
Preferably, the hair conditioning formulation of the present invention comprises 0.1 to 1 wt % (preferably, 0.15 to 0.75 wt %; more preferably, 0.2 to 0.5 wt %; most preferably, 0.25 to 0.4 wt %), based on weight of the hair conditioning formulation, of a conditioning polymer; wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups. More preferably, the hair conditioning formulation of the present invention comprises 0.1 to 1 wt % (preferably, 0.15 to 0.75 wt %; more preferably, 0.2 to 0.5 wt %; most preferably, 0.25 to 0.4 wt %), based on weight of the hair conditioning formulation, of a conditioning polymer; wherein the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; and wherein the conditioning polymer has a Kjeldahl nitrogen content, TKN, of 0.5 to 5.0 wt % (preferably, 0.75 to 4 wt %; more preferably, 1 to 3.5 wt %; most preferably, 1.5 to 3.0 wt %) measured using a Buchi KjelMaster K-375 automated analyzer, corrected for volatiles and ash measured as described in ASTM method D-2364.
Preferably, the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons (preferably, 100,000 to 2,000,000 Daltons; more preferably, 125,000 to 1,000,000 Daltons; still more preferably, 130,000 to 650,000 Daltons; most preferably, 145,000 to 525,000 Daltons). More preferably, the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons (preferably, 100,000 to 2,000,000 Daltons; more preferably, 125,000 to 1,000,000 Daltons; still more preferably, 130,000 to 650,000 Daltons; most preferably, 145,000 to 525,000 Daltons); and wherein the dextran polymer is a branched chain dextran polymer comprising a plurality of glucose structural units; wherein 90 to 98 mol % (preferably, 92.5 to 97.5 mol %; more preferably, 93 to 97 mol %; most preferably, 94 to 96 mol %) of the glucose structural units are connected by α-D-1,6 linkages and 2 to 10 mol % (preferably, 2.5 to 7.5 mol %; more preferably, 3 to 7 mol %; most preferably, 4 to 6 mol %) of the glucose structural units are connected by α-1,3 linkages. Most preferably, the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the dextran polymer has a weight average molecular weight of 50,000 to 3,000,000 Daltons (preferably, 100,000 to 2,000,000 Daltons; more preferably, 125,000 to 1,000,000 Daltons; still more preferably, 130,000 to 650,000 Daltons; most preferably, 145,000 to 525,000 Daltons); wherein the dextran polymer is a branched chain dextran polymer comprising a plurality of glucose structural units; wherein 90 to 98 mol % (preferably, 92.5 to 97.5 mol %; more preferably, 93 to 97 mol %; most preferably, 94 to 96 mol %) of the glucose structural units are connected by α-D-1,6 linkages and 2 to 10 mol % (preferably, 2.5 to 7.5 mol %; more preferably, 3 to 7 mol %; most preferably, 4 to 6 mol %) of the glucose structural units are connected by α-1,3 linkages according to formula I
wherein R is selected from a hydrogen, a C1-4 alkyl group and a hydroxy C1-4 alkyl group; and wherein the average branch off the dextran polymer backbone is ≤3 anhydroglucose units.
Preferably, the branched chain dextran polymer contain less than 0.01 wt %, based on weight of the branched chain dextran polymer, of alternan. More preferably, the branched chain dextran polymer contain less than 0.001 wt %, based on weight of the branched chain dextran polymer, of alternan. Most preferably, the branched chain dextran polymer contain less than the detectable limit of alternan.
Preferably, the conditioning polymer is a dextran polymer functionalized with tertiary amine groups; wherein the tertiary amine groups are selected from the group consisting of trialkyl ammonium moieties of formula (A) bound to a pendent oxygen on the dextran polymer
wherein
is a pendant oxygen on the dextran polymer; wherein X is a divalent linking group bonding the tertiary amine moiety to the pendent oxygen on the dextran polymer (preferably, wherein X is selected from divalent hydrocarbon groups, which may optionally be substituted (e.g., with a hydroxy group, an alkoxy group, an ether group, a cationic nitrogen group); more preferably, wherein X is a —(CH2)y— group, wherein y is 1 to 4 (preferably, 1 to 3; more preferably, 1 to 2; most preferably, 2); most preferably, X is a —CH2CH2— group); wherein z is 0 or 1; wherein R2 and R3 are independently selected from the group consisting of a C1-7 alkyl group (preferably, a C1-3 alkyl group; more preferably, a methyl group and an ethyl group; most preferably, an ethyl group) or R2 and R3 may form a saturated or unsaturated ring structure (preferably, wherein the saturated or unsaturated ring structure including the N from which R2 and R3 are bound is selected from the group consisting of piperidine, piperazine, imidazole and morpholine; more preferably, wherein the saturated or unsaturated ring structure including the N from which R2 and R3 are bound is selected from the group consisting of imidazole and morpholine).
Preferably, the conditioning polymer comprises <0.001 meq/gram (preferably, <0.0001 meq/gram; more preferably, <0.00001 meq/gram; most preferably, <detectable limit) of aldehyde functionality.
Preferably, the conditioning polymer comprises <0.1% (preferably, <0.01%; more preferably, <0.001%; most preferably, <detectable limit), of the linkages between individual glucose units in the conditioning polymer are β-1,4 linkages.
Preferably, the conditioning polymer comprises <0.1% (preferably, <0.01%; more preferably, <0.001%; most preferably, <detectable limit), of the linkages between individual glucose units in the conditioning polymer are β-1,3 linkages.
Preferably, the conditioning polymer comprises <0.001 meq/gram (preferably, <0.0001 meq/gram; more preferably, <0.00001 meq/gram; most preferably, <detectable limit) of silicone containing functionality.
Preferably, the hair conditioning formulation of the present invention contains <0.01 wt % (preferably, <0.001 wt %; more preferably, <0.0001 wt %; most preferably, <detectable limit), based on weight of the hair conditioning formulation of a dermatologically acceptable oil. More preferably, the hair conditioning formulation of the present invention contains <0.01 wt % (preferably, <0.001 wt %; more preferably, <0.0001 wt %; most preferably, <detectable limit), based on weight of the hair conditioning formulation of a dermatologically acceptable oil; wherein the dermatologically acceptable oil is selected from the group consisting of hydrocarbon oils (e.g., mineral oil, petroleum jelly, polyisobutene, hydrogenated polyisobutene, hydrogenated polydecene, polyisohexadecane; natural oils (e.g., caprylic and capric triglyceride, sunflower oil, soybean oil, coconut oil, argan oil, olive oil, almond oil); fragrance oils (e.g., limonene) and mixtures thereof.
Preferably, the hair conditioning formulation of the present invention contains <0.1 wt % (preferably, <0.001 wt %; more preferably, <0.0001 wt %; most preferably, <detectable limit), based on weight of the hair conditioning formulation, of silicones (e.g., polydimethylsiloxanes, dimethicone, cyclodimethicone).
Preferably, the hair conditioning formulation of the present invention contains <0.1 wt % (preferably, <0.001 wt %; more preferably, <0.0001 wt %; most preferably, <detectable limit), based on weight of the hair conditioning formulation, of silicon (Si) containing molecules.
Preferably, the hair conditioning formulation of the present invention, optionally, further comprises at least one additional ingredient selected from the group consisting of an antimicrobial agent/preservative (e.g., benzoic acid, sorbic acid, phenoxyethanol, methylisothiazolinone); a cleansing surfactant; a rheology modifier (e.g., PEG-150 pentaerythrityl tetrastearate); a soap; a colorant; pH adjusting agent; an antioxidant (e.g., butylated hydroxytoluene); a humectant (e.g., glycerin, sorbitol, monoglycerides, lecithins, glycolipids, fatty alcohols, fatty acids, polysaccharides, sorbitan esters, polysorbates (e.g., Polysorbate 20, Polysorbate 40, Polysorbate 60, and Polysorbate 80), diols (e.g., propylene glycol), diol analogs, triols, triol analogs, cationic polymeric polyols); a wax; a foaming agent; an emulsifying agent; a colorant; a fragrance; a chelating agent (e.g., tetrasodium ethylene diamine tetraacetic acid); a preservative (e.g., benzoic acid, sorbic acid, phenoxyethanol, methylisothiazolinone); a bleaching agent; a lubricating agent; a sensory modifier; a sunscreen additive; a vitamin; a protein/amino acid; a plant extract; a natural ingredient; a bioactive agent; an anti-aging agent; a pigment; an acid; a penetrant; an anti-static agent; an anti-frizz agent; an antidandruff agent; a hair waving/straightening agent; a hair styling agent; an absorbent; a hard particle; a soft particle; a conditioning agent (e.g., guar hydroxypropyltrimonium chloride, PQ-10, PQ-7); a slip agent; an opacifier; a pearlizing agent and a salt. More preferably, the hair conditioning formulation of the present invention, optionally, further comprises at least one additional ingredient selected from the group consisting of an antimicrobial agent/preservative (e.g., benzoic acid, sorbic acid, phenoxyethanol, methylisothiazolinone); a cleansing surfactant; a rheology modifier (e.g., PEG-150 pentaerythrityl tetrastearate); and a chelating agent (e.g., tetrasodium ethylene diamine tetraacetic acid). Most preferably, the hair conditioning formulation of the present invention, optionally, further comprises at least one additional ingredient selected from the group consisting of an antimicrobial agent/preservative mixture of phenoxyethanol and methylisothiazolinone; PEG-150 pentaerythrityl tetrastearate; tetrasodium ethylene diamine tetraacetic acid and a mixture of phenoxyethanol and methylisothiazolinone.
Preferably, the hair conditioning formulation of the present invention further comprises a dermatologically acceptable hair care cleansing surfactant. More preferably, the hair conditioning formulation of the present invention further comprises a dermatologically acceptable hair care cleansing surfactant, wherein the dermatologically acceptable hair care cleansing surfactant is selected from the group consisting of alkyl polyglucosides (e.g., lauryl glucoside, coco-glucoside, decyl glucoside), glycinates (e.g., sodium cocoyl glycinate), betaines (e.g., alkyl betaines such as cetyl betaine and amido betaines such as cocamidopropyl betaine), taurates (e.g., sodium methyl cocoyl taurate), glutamates (e.g., sodium cocoyl glutamate), sarcosinates (e.g., sodium lauroyl sarcosinate), isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methyl isethionate), sulfoacetates (e.g., sodium lauryl sulfoacetate), alaninates (e.g., sodium cocoyl alaninate), amphoacetates (e.g., sodium cocoamphoacetate), sulfates (e.g., sodium lauryl ether sulfate (SLES)), sulfonates (e.g., sodium C14-16 olefin sulfonate), succinates (e.g., disodium lauryl sulfosuccinate), fatty alkanolamides (e.g., cocamide monoethanolamine, cocamide diethanolamine, soyamide diethanolamine, lauramide diethanolamine, oleamide monoisopropanolamine, stearamide monoethanolamine, myristamide monoethanolamine, lauramide monoethanolamine, capramide diethanolamine, ricinoleamide diethanolamine, myristamide diethanolamine, stearamide diethanolamine, oleylamide diethanolamine, tallowamide diethanolamine, lauramide monoisopropanolamine, tallowamide monoethanolamine, isostearamide diethanolamine, isostearamide monoethanolamine) and mixtures thereof.
Preferably, the hair conditioning formulation of the present invention further comprises a thickener. More preferably, the hair conditioning formulation of the present invention further comprises a thickener, wherein the thickener is selected to increase the viscosity of the hair conditioning formulation, preferably without substantially modifying the other properties of the hair conditioning formulation. Preferably, the hair conditioning formulation of the present invention further comprises a thickener, wherein the thickener is selected to increase the viscosity of the hair conditioning formulation, preferably without substantially modifying the other properties of the hair conditioning formulation and wherein the thickener accounts for 0 to 5.0 wt % (preferably, 0.1 to 5.0 wt %; more preferably, 0.2 to 2.5 wt %; most preferably, 0.5 to 2.0 wt %), based on weight of the hair conditioning formulation.
Preferably, the hair conditioning formulation of the present invention further comprises an antimicrobial agent/preservative. More preferably, the hair conditioning formulation of the present invention further comprises an antimicrobial/preservative, wherein the antimicrobial/preservative is selected from the group consisting of phenoxyethanol, benzoic acid, benzyl alcohol, sodium benzoate, DMDM hydantoin, 2-ethylhexyl glyceryl ether, isothiazolinone (e.g., methylchloroisothiazolinone, methylisothiazolinone) and mixtures thereof. Most preferably, the hair conditioning formulation of the present invention, further comprises an antimicrobial/preservative, wherein the antimicrobial/preservative is a mixture of phenoxyethanol and an isothiazolinone (more preferably, wherein the antimicrobial/preservative is a mixture of phenoxyethanol and methylisothiazolinone).
Preferably, the hair conditioning formulation of the present invention optionally further comprises a pH adjusting agent. More preferably, the hair conditioning formulation of the present invention, further comprises a pH adjusting agent, wherein the hair conditioning formulation has a pH of 4 to 9 (preferably, 4.25 to 8; more preferably, 4.5 to 7; most preferably, 4.75 to 6).
Preferably, the pH adjusting agent is selected from the group consisting of at least one of citric acid, lactic acid, hydrochloric acid, aminoethyl propanediol, triethanolamine, monoethanolamine, sodium hydroxide, potassium hydroxide, amino-2-methyl-1-propanol. More preferably, the pH adjusting agent is selected from the group consisting of at least one of citric acid, lactic acid, sodium hydroxide, potassium hydroxide, triethanolamine, amino-2-methyl-1-propanol. Still more preferably, the pH adjusting agent includes citric acid. Most preferably, the pH adjusting agent is citric acid.
Preferably, the method of conditioning mammalian hair of the present invention comprises: selecting a hair conditioning formulation of the present invention and applying the hair conditioning formulation to mammalian hair. Preferably, the method of conditioning mammalian hair of the present invention, further comprises: wetting the hair with water before applying the hair conditioner. More preferably, the method of conditioning mammalian hair of the present invention, comprises: selecting a hair conditioning formulation of the present invention; wetting mammalian hair; and applying the hair conditioning formulation to the wetted mammalian hair. Preferably, the method of conditioning mammalian hair of the present invention further comprises: rinsing the hair with a rinse water after applying the hair conditioner.
Some embodiments of the present invention will now be described in detail in the following Examples.
A hair conditioning formulation was prepared in each of Comparative Examples CF1-CF2 and Example F1 having the formulation noted in TABLE 1.
1available from The Dow Chemical Company under tradename Cellosize ™ PCG-10
2available from The Dow Chemical Company under tradename Versene ™ 220
3available from Croda Inc. under tradename Crodacol ™ CS50
4available from Croda Inc. under tradename Arlacel ™ 165
5available from Sigma Aldrich under catalog number D4876
6available from Sigma Aldrich under catalog number D9885.
7available from The Dow Chemical Company under tradename Neolone ™ PE
Studies to evaluate ease of wet and dry combing of hair treated with a rinse off conditioner formulation of Comparative Examples CF1-CF2 and Example F1 were performed as follows. Slightly bleached Caucasian hair from International Hair Importers was used for testing the conditioners. Each tress weighed 2 grams. Each tress was rinsed for 30 seconds under a stream of 40° C. tap water. Using a pipette, 0.4 grams of a solution containing nine percent of sodium lauryl sulfate was applied and lathered through each tress for 30 seconds. The tresses were then rinsed for 1 minute under running water. Excess water was removed from the tresses by passing each tress between the index and middle fingers of the hand. The tresses were then treated with a rinse off conditioner formulation of Comparative Examples CF1-CF2 and Example F1 at 0.4 g formulation/g of hair by massaging the formulation into the wet/damp hair for 1 minute. The tresses were then rinsed for 30 seconds under running water and allowed to dry overnight at room temperature.
An INSTRON Model 4464 running BlueHill 2 software was also used for determining conditioning performance by the ease of wet combing and the ease of dry combing. The test employed an INSTRON strain gauge, which was equipped to measure the force required to comb the hair. The conditioning performance was based on the ability of the rinse off conditioner formulation, to reduce the force required to comb the hair with the INSTRON strain gauge. The force was reported as an Average Combing Load (ACL). The lower the number of the ACL value, the better the conditioning effect imparted by the rinse off conditioner formulation tested.
According to the INSTRON wet combing method, hair was first wetted by dipping into distilled water, and then the hair was detangled by combining the tress three times. The tress was then retangled by dipping in distilled water three times. Excess water was removed by passing the tress through the index and middle fingers of the hand twice. The tress was placed on a hanger and INSTRON combed. An average wet combing force from three tresses was measured for each rinse off conditioner formulation. The average wet combing results are provided in TABLE 2.
According to the INSTRON dry combining method, dry hair was detangled by combining the tress 3 times. Then the hair was retangled by swirling the tress clockwise 3 times and swirling it counter clockwise 3 times. The tress was then placed on a hanger and INSTRON combed. An average dry combining force from three tresses was measured for each rinse off conditioner formulation. The average dry combining results are provided in TABLE 2.
Rinse off hair conditioner prepared according to each of Comparative Example CF2 and Example F1 were tested on two separate 3 g hair samples (Slightly Bleached Caucasian Hair, International Hair Importers, Inc.). The hair samples were first rinsed with water for 30 seconds. Then a 9% w/w aqueous solution of sodium lauryl sulfate was massaged into the hair samples for 30 seconds. Then the hair samples were rinsed with water for one minute. The hair samples were then treated with the rinse off hair conditioner at a dosage of 0.4 g/g or hair and massaged onto the hair for 30 seconds. The hair samples where then rinsed with water for 30 seconds and dried before hydrophobicity testing.
To measure hydrophobicity of the hair, the tresses were combed straight, and the tresses were held tightly on both ends with a holder. Ten 30 μL drops of water were placed at different locations on each tress from the root to the tip. While the water was observed to immediately dissipate into the tress treated with the formulation of Comparative Example CF2, the water continued to bead off of the tress treated with the formulation of Example F1 even after 20 minutes indicating that the rinse off conditioner formulation of Example F1 successfully restored hydrophobicity benefit to the slightly bleached Caucasian hair.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2022/019472 | 3/9/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 63164608 | Mar 2021 | US |
| Child | 18261703 | US |
