WO2011071713A1 - Procédé d'évaluation des dégâts causés à des fibres de kératine - Google Patents

Procédé d'évaluation des dégâts causés à des fibres de kératine Download PDF

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Publication number
WO2011071713A1
WO2011071713A1 PCT/US2010/058260 US2010058260W WO2011071713A1 WO 2011071713 A1 WO2011071713 A1 WO 2011071713A1 US 2010058260 W US2010058260 W US 2010058260W WO 2011071713 A1 WO2011071713 A1 WO 2011071713A1
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Prior art keywords
fiber
fibers
sample
fluorescent compound
fluorescence
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PCT/US2010/058260
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English (en)
Inventor
Hiroyuki Kudo
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to MX2012006251A priority Critical patent/MX2012006251A/es
Priority to EP10795500.7A priority patent/EP2510360B1/fr
Priority to JP2012542123A priority patent/JP5551791B2/ja
Priority to CN2010800554977A priority patent/CN102648416A/zh
Publication of WO2011071713A1 publication Critical patent/WO2011071713A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • G01N33/6881—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids from skin
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
    • G01N2333/46—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from vertebrates
    • G01N2333/47—Assays involving proteins of known structure or function as defined in the subgroups
    • G01N2333/4701—Details
    • G01N2333/4742—Keratin; Cytokeratin

Definitions

  • the present invention relates to a method for assessing damages of keratin fibers using a cationic fluorescent compound comprising a cationic ammonium group and being free of carboxyl and/or sulfonyl groups.
  • the present invention relates to a method for comparing the damages of different keratin fibers using said cationic fluorescent compound. Said methods are useful for quantitatively and/or qualitatively assessing the degree of damages of keratin fibers and also to compare the damages of fibers of different origin, different portions of fibers and/or fibers treated with different cosmetic, chemical and/or mechanical treatments. Said methods are also useful for supporting advertising claims about the superiority of a composition and/or a treatment versus others.
  • Keratin fibers may be damaged over time. Damages may concern the outer layer of the fiber (i.e. the cuticle) and/or the inner layers (i.e. the cortex and the medulla).
  • the cuticle consists of flat overlapping cells (scales), which are attached at the proximal end (root end), and they point toward the distal end (tip end) of the hair fiber. When having no surface damages, the cuticle usually comprises smooth undamaged scale edges and scale surfaces. In contrast, when hair fibers are damaged, scale edges are damaged. Damages, particularly those to the cuticle, make hair fibers more vulnerable to chemical and mechanical breakdown and impact on the behavior and the cosmetic behavior of hair, including the elastic and tensile deformations, the bending and fiber stiffness, and torsion and fiber rigidity.
  • Damages may be caused by environmental factors, including air pollution, sun exposure, water pool, and/or rain. Damages may also be caused by applying to the fibers grooming (cosmetic), chemical and/or mechanical treatments. Grooming treatments, particularly shampoo, are conventionally used in order to cleanse the hair. However, shampoos may damage the hair in different ways. They may damage the hair by abrasion and/or erosion, and also by slowly dissolving or removing structural lipids and proteinaceous material from hair. Chemical treatments usually involve modifying the structure of hair and may impart severe damages to hair fibers. This includes for example reducing hair (such as permanent waving processes), bleaching hair and/or dyeing hair using oxidation dyes and/or permanent hair dyes. Mechanical treatments, particularly brushing, combing, towel drying and blow-drying, may damage the hair by abrasion and/or erosion.
  • Damages may be prevented and/or at least partially repaired by applying a suitable treatment.
  • conditioning compositions are conventionally used to prevent and/or repair damages. They may comprise cationic surfactant in combination with long chain fatty alcohol and/or other lipid compounds. They may also comprise silicone-based compounds.
  • Assessing the degree of damages caused to hair is of interest in order to understand the impact of various environmental factors as well as the impact of the cosmetic (grooming), chemical and mechanical treatments onto keratin fibers. Such assessment is also of interest in order to demonstrate the efficacy of treatments used for preventing and/or repairing hair damages.
  • Several attempts for assessing hair damages, using different analytical methods, have already been reported. However, such methods usually require using complex and expensive technical devices and/or do not provide reliable data. Particularly, it has already been reported methods using some fluorescent compounds. However, when comparing for example healthy hair (i.e. undamaged) and damaged hair, the data obtained between both hairs seems to be not significantly different.
  • the present invention relates to a method for assessing damages of keratin fibers comprising particularly the steps of tagging at least one sample of fiber(s) with a specific cationic fluorescent compound and assessing the fluorescence of the tagged fibers.
  • the present invention also relates to a method for assessing and comparing damages of keratin fibers particularly comprising the steps of providing at least two different samples of fiber(s), tagging them with a specific cationic fluorescent compound, and assessing and then comparing the fluorescence of the tagged fibers.
  • These methods allow assessing and comparing the degree of damages of fibers after exposure to environmental exposure and after treatments using cosmetic, chemical and/or mechanical treatments.
  • These methods also allow assessing the efficacy of composition(s) for preventing and/or repairing damages to hair.
  • these methods allow assessing and comparing the efficacy of compositions for preventing and/or repairing damages to hair.
  • the present invention relates to a method for assessing damages of keratin fibers comprising the steps of:
  • a cationic fluorescent compound comprising a quaternary ammonium group and being free of carboxyl and/or sulfonyl groups
  • the inventors have surprisingly found that the degree of keratin fiber-surface damages may be assessed, both qualitatively and quantitatively, by using fluorescence microscopy and by carefully selecting the fluorescent compound to be used. Indeed, the inventors have found that cationic fluorescent compounds comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups allow, when used in combination with a device emitting an appropriate excitation wavelength, the obtaining of data suitable for assessing the fluorescence of the fibers and correlating such fluorescence with a certain degree of damages. Likewise, these specific cationic fluorescent compounds allow the obtaining of data suitable for comparing the fluorescence of the treated fibers versus untreated fibers, or fibers treated with two different treatments.
  • cationic fluorescent compounds comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups interact significantly more with damaged fibers versus undamaged fibers and that such interaction increases with the degree of damages of the fibers.
  • these cationic fluorescent compounds comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups interact specifically with damaged scale edges and surfaces (typical of damaged fibers), particularly by means of electrostatic attraction. In contrast, they interact significantly less, if not at all, with smooth undamaged scale edges and scale surfaces (typical of healthy or undamaged fibers).
  • the method comprises the provision of at least one sample of keratin fiber(s) (so-called “provision step”).
  • Said sample may comprise one fiber, two or several fibers. When said sample comprises at least two fibers, said fibers may be bundled to each other at one end, or alternatively at both ends.
  • Said sample usually comprises fibers of the same origin (e.g. from the same person and the same region of the body), and/or of the same portion (e.g. root end or tip end of hair fibers), and/or having been subjected to the same cosmetic, chemical and/or mechanical treatments.
  • the fibers may be of sufficient length for being put in contact with the cationic fluorescent compound and for having their fluorescence assessed.
  • the fibers have preferably a length of 1 cm to 10 cm, more preferably of 1 cm to 5 cm, still more preferably of 2 cm to 5 cm.
  • the fibers may be selected from mammal hair, preferably from human hair, more preferably from human female hair.
  • the origin of the human hair may be Caucasian, African, Asian, or any other origin.
  • the hair fiber may be obtained from any part of the body, e.g. the legs, the arms, the torso, the face or the scalp.
  • the hair fiber is preferably obtained from the scalp.
  • the method further comprises the step of providing a cationic fluorescent compound comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups (so-called “provision step”).
  • This compound is capable of interacting with negatively charged keratin fiber(s).
  • This compound may also be called cationic fluorescent probe. Particularly, said interaction may occur by means of electrostatic attraction between the positively charged quaternary ammonium groups of the cationic fluorescent compounds and the negatively charged groups of the keratin fiber(s).
  • provision step a cationic fluorescent compound comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups.
  • a cationic fluorescent compound comprising at least one carboxyl and/or sulfonyl group
  • a large variation of the fluorescence intensity is obtained, particularly when working with undamaged hair fibers.
  • Such compound is for example Ethanaminium, N-[9-(2-Carboxyphenyl)-6- (Diethylamino)-3H-Xanthen-3-ylidene]-N-Ethyl-, Chloride.
  • Ethanaminium N-[9-(2-Carboxyphenyl)-6- (Diethylamino)-3H-Xanthen-3-ylidene]-N-Ethyl-, Chloride.
  • Such variation does not render difficult the correlation between the fluorescence intensity and the degree of damages.
  • the cationic fluorescent compound may be selected from the group of cationic fluorescent compounds comprising at least one quaternary ammonium group and being free of carboxylic group and/or sulfonyl groups and belonging to the classes of acridine, azo, diarylmethane, eurhodin, oxazone, thiazole, triarylmethane, safranin, or mixtures thereof.
  • the cationic fluorescent compound may be selected from the group of compounds of Colour Index (referred hereinafter as "C.I.") number 46005, 41000, 50040, 51180, 49005, 42000, 42040, 42500, 42510, 42520, 42555, 42563, 42585, 42600, 44045, 44085, 50240, or mixtures thereof. Said compounds may be further defined by their common names, C.I.
  • the cationic fluorescent compound may be obtained by quaternization of a cationic fluorescent compound comprising a primary, a secondary and/or a tertiary ammonium group using any suitable alkylating agent such as methyl iodide.
  • the cationic fluorescent compound may be obtained from a compound selected from the group of compounds of C.I. number (common name, C.I. name and/or empirical formula) 21000 (Bismarck brown, basic brown 1, C 18 H2oN 8 Cl2), 52015 (Methylene blue, basic blue 9, Ci 6 Hi 8 N 3 SCl), 52020 (Methylene green, basic green 5, C16H17N4O2SCI), 52020 (Toluidine blue, basic blue 17, Ci 5 Hi 6 N 3 SCl).
  • the cationic fluorescent compound is preferably selected from the group of compounds belonging to the class of thiazole.
  • the cationic fluorescent compound is a thiazole compound of
  • Said thiazole compound of formula I is conventionally known, and hereinafter referred to as, Thioflavine T.
  • Thioflavine T has a molecular weight of 318.9 and emits fluorescence from 450 nm to 600 nm of emission wavelength at 400 nm to 440 nm of excitation wavelength. Particularly, Thioflavine T emits a green fluorescence from 500 nm to 560 nm of emission wavelength.
  • a commercially available source of said thiazole compound of formula I is for example Thioflavine T from Sigma.
  • Thioflavine T is particularly beneficial as it has been found by the inventors that the interaction between this compound and the keratin fibers differs significantly depending on whether the keratin fibers are damaged or not, and on the degree of damage. Thioflavine T is particularly suitable therefore for comparing the degree of damages between keratin fibers of different origin, from different portion and/or having been subjected to different treatments.
  • the cationic fluorescent compound may be provided in any appropriate form, e.g. pulverulent, liquid or solid form.
  • the cationic fluorescent compound is provided preferably in the form of a solution, more preferably in the form of an aqueous solution.
  • the solution may comprise from 1 ppm to 3000 ppm, preferably from 100 ppm to 1000 ppm, more preferably from 400 ppm to 600 ppm, of said compound by total weight of the composition.
  • the solution may also comprise a suitable aqueous carrier, preferably water.
  • the method further comprises the step of tagging the sample(s) of fiber(s) with the cationic fluorescent compound (so-called “tagging step”).
  • the tagging step may be carried out by putting the sample(s) in contact with the cationic fluorescent compound by any suitable means and for a defined period of time sufficient for the cationic fluorescent compound to interact with the fiber(s).
  • the fiber(s) may be referred hereinafter as "tagged fiber(s)".
  • the cationic fluorescent compound is provided in the form of a solution
  • the sample(s) is(are) put in contact with the cationic fluorescent compound by means of immersing said sample(s) into the solution.
  • the fiber(s) is(are) preferably put in contact with the cationic fluorescent compound for 1 sec to 10 min, more preferably 1 sec to 1 min.
  • the method further comprises the step of assessing the fluorescence of the tagged fiber(s) using a source providing appropriate excitation wavelength(s) (so-called “assessment step”).
  • the excitation wavelengths would be dependent on the cationic fluorescent compound used. Indeed, each cationic fluorescent compound has a specific absorption spectrum.
  • the source should provide appropriate excitation wavelengths. Any commercially available source providing specific wavelengths may be used.
  • Thioflavine T has a maximum absorption at 440 nm and emits - when in an excited state - "fluorescent" emission wavelengths from 450 nm to 600 nm (particularly from 500 nm to 560 nm for green fluorescence).
  • excitation wavelengths of 400 nm to 440 nm should be provided.
  • the step of assessing the fluorescence of the tagged fiber(s) may be carried out using any device suitable for detecting, and if needed displaying and/or recording, the wavelengths emitted (i.e. the fluorescence) by the cationic fluorescent compound.
  • the detection may be carried out using a fluorescence microscope.
  • a commercially available fluorescence microscope is for example Eclipse 80i from Nikon or Cyscope from Partec.
  • the assessment of the fluorescence may be assisted using suitable software(s).
  • Commercially available software for observation is for example DynamicEye REAL from Mitani Corporation and LuminaVision from Mitani Corporation.
  • Commercially available software for image analysis is for example LuminaVision from Mitani Corporation.
  • the fluorescence of the sample(s) may be assessed qualitatively by visual inspection, either by direct visual inspection such as observation through the binocular or by indirect visual inspection such as picture analysis.
  • the fluorescence of the sample(s) may also be assessed quantitatively by data analysis.
  • the method may also comprise the step of treating the sample(s) of fiber(s) (so-called "treatment step").
  • the treatment step is preferably carried out after the provision step and before the tagging step.
  • the treatment step may be carried out by treating the sample(s) of fiber(s) using any suitable cosmetic composition, chemical and/or mechanical treatment(s).
  • This step may be carried out by applying a cosmetic composition onto keratin fiber(s).
  • any suitable cosmetic composition known in the art may be used such as shampoo(s), conditioning composition(s), hair rinse-off treatment(s), hair leave-on treatment(s), styling composition(s).
  • any commercially available shampoos, conditioners, hair rinse-off treatments and hair leave-on treatments of tradename Pantene® and Head & Shoulders® may be used.
  • the treating step comprises treating (washing) the fiber(s) with a shampoo, then rinsing the washed fiber(s) with water, then drying the fiber(s).
  • the treating step comprises treating (washing) the fiber(s) with a shampoo, then rinsing the washed fiber(s) with water, then treating the fiber(s) with a conditioning composition, then rinsing the treated fiber(s) with water, then drying the fiber(s).
  • the treating step comprises treating (washing) the fiber(s) with a shampoo, then rinsing the washed fiber(s) with water, then treating the fiber(s) with a conditioning composition, then rinsing the treated fiber(s) with water, then treating at least one time the fiber(s) with a hair rinse-off treatment, then rinsing the treated fiber(s) with water, then drying the fiber(s).
  • this step may be carried out by chemically treating the sample(s) of fiber(s) using a chemical treatment.
  • a chemical treatment Any suitable chemical treatment known in the art may be used such as permanent waving treatment, bleaching treatment and/or color-dyeing treatment.
  • this step may be carried out by mechanically treating the sample(s) of fiber(s). Any suitable mechanical treatment known in the art may be used such as brushing, combing, towel rubbing, and/or blow drying.
  • the method may also comprise the step of rinsing out the excess of cationic fluorescent compound (so-called rinsing step).
  • the rinsing step may be carried out after the tagging step and before the assessment step. Rinsing the fiber(s) in order to remove the excess of cationic fluorescent compound - i.e. compounds not interacting with the fiber(s) (co-called "free compounds") - is beneficial for avoiding the assessment of the fluorescence of the fibers to be impacted by the presence of free compounds.
  • the fibers may be rinsed using water. Particularly, this step may be carried out by immersing the sample(s) of fiber(s) in an aqueous solution for a defined period of time sufficient for removing the excess of cationic fluorescent compound.
  • the aqueous solution is preferably water, more preferably deionised water. The period of time is preferably from 1 sec to 10 min, more preferably from 1 sec to 1 min.
  • the method may also comprise the step of utilizing said assessment to support advertising claims (so-called “advertising step”).
  • advertising step the present method allows correlating the degree of damages of keratin fibers with the fluorescence intensity.
  • advertising one treatment e.g. a conditioning composition
  • the data and/or the pictures obtained using this method may be used therefore support and/or demonstrate advertising claims according to which said treatment prevent and/or repair fiber damages.
  • the present invention relates to the method comprising the steps of: providing at least two different samples of keratin fiber(s);
  • a cationic fluorescent compound comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups;
  • the method comprises the step of providing at least two, preferably from two to four, more preferably two, different samples of keratin fiber(s).
  • “different samples” means samples differing from each other by the origin of the fibers, the portion of the fibers and/or the treatment(s) applied to fibers.
  • the samples may be obtained from a different person.
  • the samples may be obtained from the same person but from a different part of the body.
  • one sample may comprise the tip portion of fiber(s) and the other sample may comprise the root portion of the same fiber(s). Providing and comparing different portions of the same fiber(s), particularly tip versus root, allows assessing the difference of the degree of damages over time, as the fiber(s) grows(-).
  • one sample may comprise untreated fiber(s) and the other sample comprises fiber(s) treated with a cosmetic composition.
  • the other sample may be treated with a shampoo, and/or a conditioning composition, and/or a hair rinse-off treatment, and/or a leave-on treatment, and/or any other suitable cosmetic composition. Comparing treated fiber(s) and untreated fiber(s) is beneficial for assessing the damaging effects of the compositions such as shampoos onto hair or, in contrast, for assessing the benefits of the compositions such as conditioning compositions for preventing and/or repairing the damages of the fiber(s).
  • the samples may be treated with different cosmetic compositions.
  • one sample may be treated with one shampoo and the other sample with another shampoo; (2) one sample may be treated with one shampoo and the other sample may be treated with the same shampoo and then one conditioner; (3) one sample may be treated with one shampoo and then one conditioner and the other sample may be treated with the same shampoo and then another conditioner, (4) one sample may be treated with one shampoo and then one conditioner and the other sample may be treated with the same shampoo, then the same conditioner, and then a rinse-off treatment, (5) one sample may be treated with one shampoo and then one conditioner and the other sample may be treated with the same shampoo, then the same conditioner, and then a leave-on treatment, (6) one sample may be treated with one shampoo and then one conditioner and the other sample may be treated with another shampoo and then the same conditioner; (7) one sample may be treated one time with one shampoo and the other sample may be treated two or several time with the same shampoo; (8) one sample may be treated one time with one conditioner and the other sample may be treated two or
  • Comparing differently treated fiber(s) is beneficial for comparing the damaging effects of different shampoos (see (1)); for assessing the mitigating effects of conditioners onto shampoo treatments (see (2)); for comparing the benefits of conditioning compositions for preventing and/or repairing the damages of the fiber(s) (see
  • one sample may comprise untreated fiber(s) and the other sample comprises fibers being chemically-treated.
  • the samples may comprise fiber(s) be treated with different chemical treatments.
  • one sample may comprise untreated fiber(s) and the other sample comprises fibers being mechanically-treated.
  • the samples may comprise fiber(s) be treated with different mechanical treatments.
  • the provision (cationic fluorescent compound) step(s), the optional/alternative treatment step(s), the tagging step(s), the optional rinsing step(s), the assessment step, and the optional advertising step are defined hereinbefore together with the first aspect of the present invention.
  • the method also comprises the step of comparing the fluorescence of the samples (so- called "comparison step").
  • the fluorescence of the sample(s) may be compared qualitatively by visual inspection, either by direct visual inspection such as observation through the binocular or by indirect visual inspection such as picture analysis.
  • the fluorescence of the sample(s) may also be compared quantitatively by data analysis.
  • the comparison step is beneficial for example for comparing the effects of one treatment onto fibers (versus no treatment), for comparing the damaging effects of at least two different treatments, for comparing the efficacy of at least two different treatments for preventing and/or repairing the damages of fibers.
  • the method may also comprise the step of utilizing said assessment and comparison to support advertising claims (so-called "advertising step”).
  • Making advertising steps based on the outcome of the comparison between two different samples is beneficial for example for advertising the efficacy of a treatment for preventing and/or repairing damages to fibers and/or for advertising the superiority of one treatment versus another treatment for preventing and/or repairing damages.
  • advertising one treatment e.g. a conditioning composition
  • the data and/or the pictures obtained using this method may be used therefore support and/or demonstrate advertising claims according to which said treatment provide higher performance versus the other one for preventing and/or repairing fiber damages.
  • the present invention relates to a method for assessing damages of keratin fibers comprising the steps of:
  • a cationic fluorescent compound comprising at least one quaternary ammonium group and being free of carboxyl and/or sulfonyl groups;
  • the present invention relates to a method for assessing and comparing damages of different keratin fibers comprising the steps of:
  • the present invention relates to a method for assessing and comparing damages of different keratin fibers comprising the steps of:
  • Hair fibers 25 cm long- Asian female hair fibers
  • Microscope Eclipse 80i from Nikon
  • composition of pH 5-7 comprising behentrimonium methosulfate/isopropyl alcohol (2.3%), fatty alcohols (5.2%), terminal aminodimethicone (4.0%), preservatives (0.6%), water q.s. to 100%.
  • Percentages of compounds are weight percent per total weight of the composition. Protocol
  • some of the steps may be omitted, e.g. the treating step.
  • Provision step One sample being either the root portion of one hair fiber ("3 cm to 6 cm”-portion from hair root) or a sample of the tip portion of one hair fiber ("14 cm to 20 cm”- portion from hair root) is provided. Each sample is washed with cleansing shampoo solution (10%).
  • Provision step It is provided an aqueous solution comprising 500 ppm Thioflavin T (Sigma) - hereinafter referred to as "Thioflavin T solution”.
  • the fluorescence emitted by the untreated tip portion is significantly higher than the untreated root portion (with paired t-test @95% confidence level).
  • the method according to the present invention is suitable for correlating the intensity of the fluorescence of hair fibers (via the cationic fluorescent compound interacting with the fibers) with their degree of damages. The more damaged the hair fibers are, the more intense the fluorescence.
  • each group comprises a treated tip portion versus untreated tip portion (controls 1 and 2).
  • the fluorescence intensity is assessed according to the protocol described above.
  • steps 3 are omitted.
  • step 3 is conducted as described in the table II below.
  • the fluorescence intensity of treated tip portions is significantly lower than the fluorescence intensity of the untreated tip portions (with paired t-test @95% confidence level). This shows that the degree of damages of treated damaged fibers (herein tip portion) is significantly reduced versus untreated damaged fibers.
  • the method according to the present invention is suitable for assessing the efficacy of conditioning compositions and/or rinse-off treatments for repairing - and by extension preventing - damages to hair fibers.
  • the fluorescence intensity of treated tip portions of group 2 is significantly lower than the fluorescence intensity of treated tip portions of group 1 (with paired t-test @80% confidence level). This shows that the treatments of group 2 (including additional treatment by Rinse-off treatment) reduces the degree of damages of damaged fibers further than the treatments of group 1. This demonstrates that the method according to the present invention is suitable for assessing and comparing the efficacy of two different treatments for repairing - and by extension preventing - damages to hair fibers.

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Abstract

La présente invention concerne un procédé permettant d'évaluer les dégâts causés à des fibres de kératine à l'aide d'un composé fluorescent cationique comprenant un groupe ammonium cationique et exempt de groupes carboxyle et/ou sulfonyle ainsi qu'un procédé permettant de comparer les dégâts causés à différentes fibres de kératine à l'aide dudit composé fluorescent cationique. Lesdits procédés sont utiles pour évaluer quantitativement et/ou qualitativement le degré des dégâts causés aux fibres de kératine et aussi pour comparer les dégâts causés à des fibres d'origines différentes, à différentes parties de fibres et/ou à des fibres traitées avec des cosmétiques, des produits chimiques et/ou des traitements mécaniques différents. Lesdits procédés sont également utiles pour soutenir des messages publicitaires sur la supériorité d'une composition et/ou d'un traitement par rapport à d'autres.
PCT/US2010/058260 2009-12-07 2010-11-30 Procédé d'évaluation des dégâts causés à des fibres de kératine WO2011071713A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MX2012006251A MX2012006251A (es) 2009-12-07 2010-11-30 Metodo para evaluar el daño de fibras de queratina.
EP10795500.7A EP2510360B1 (fr) 2009-12-07 2010-11-30 Procédé d'évaluation des dégâts causés à des fibres de kératine
JP2012542123A JP5551791B2 (ja) 2009-12-07 2010-11-30 ケラチン繊維の損傷評価方法
CN2010800554977A CN102648416A (zh) 2009-12-07 2010-11-30 用于评估角蛋白纤维损伤的方法

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US26709309P 2009-12-07 2009-12-07
US61/267,093 2009-12-07

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WO2011071713A1 true WO2011071713A1 (fr) 2011-06-16

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US (1) US20110136134A1 (fr)
EP (1) EP2510360B1 (fr)
JP (1) JP5551791B2 (fr)
CN (1) CN102648416A (fr)
MX (1) MX2012006251A (fr)
WO (1) WO2011071713A1 (fr)

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WO2016149495A1 (fr) 2015-03-19 2016-09-22 The Procter & Gamble Company Composés fluorescents résistant à la transpiration acide pour coloration des cheveux
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MX2012006251A (es) 2012-06-19
EP2510360B1 (fr) 2015-07-22
JP5551791B2 (ja) 2014-07-16
CN102648416A (zh) 2012-08-22

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