WO2015056730A1 - ケラチン繊維の染色方法及びケラチン繊維用染色剤 - Google Patents
ケラチン繊維の染色方法及びケラチン繊維用染色剤 Download PDFInfo
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- WO2015056730A1 WO2015056730A1 PCT/JP2014/077504 JP2014077504W WO2015056730A1 WO 2015056730 A1 WO2015056730 A1 WO 2015056730A1 JP 2014077504 W JP2014077504 W JP 2014077504W WO 2015056730 A1 WO2015056730 A1 WO 2015056730A1
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- oxidase
- dyeing
- keratin fibers
- electrostatic repulsion
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- 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
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
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- 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
- A61K8/64—Proteins; Peptides; Derivatives or degradation products thereof
- A61K8/66—Enzymes
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- 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
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
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- 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
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- A61K8/817—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
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- 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
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/88—Polyamides
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- 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
- A61Q5/10—Preparations for permanently dyeing the hair
Definitions
- the present invention relates to a dyeing method for keratin fibers and a dyeing agent for keratin fibers, and more particularly, a method for dyeing keratin fibers and keratin with less hair and scalp damage and rash, and excellent dyeability even when hair is dyed. It relates to a dye for textiles.
- oxidized keratin fiber dyes mainly composed of diamine-based oxidation dyes such as paraphenylenediamine and oxidants such as hydrogen peroxide have been generally used.
- diamine-based oxidation dyes such as paraphenylenediamine
- oxidants such as hydrogen peroxide
- the diamine-based oxidation dye acts as an allergen, and if the scalp is damaged, the diamine-based oxidation dye easily penetrates the scalp, causing a problem of inducing serious rash.
- Patent Documents 1 and 2 have been proposed.
- keratin fibers such as human hair have an isoelectric point of about 3.0 to 5.5 (usually around 3.7).
- the oxidase has the same isoelectric point, but the hair dyeing process is performed in a higher pH range (about 6.5 to 11.0), so both keratin fibers and oxidase are negatively charged. This is considered to have an adverse effect on dyeability.
- both are strongly negatively charged, the oxidase and keratin fibers repel each other in the dyeing process, so that the oxidase causes the oxidative dye to oxidize and develop at a position away from the keratin fibers.
- the oxidized dye molecules are thought to be distributed far away from the keratin fibers. Therefore, it is presumed that the colored oxidative dye is difficult to be adsorbed and distributed on the keratin fiber, and many of the colored oxidative dye molecules are washed away when the chemical solution is washed away after dyeing.
- the present inventors found that if the electrostatic repulsion between the oxidase and the keratin fiber is canceled in the hair dyeing process, the oxidase moves to the vicinity of the keratin fiber, and the colored oxidative dye is also produced. Since it is distributed in the vicinity of the keratin fibers, the oxidative dye is easily adsorbed and distributed on the keratin fibers, and the knowledge that the above problem can be solved has been obtained, and the present invention has been completed.
- the present invention eliminates the above-mentioned problems of the prior art and uses a substance that is positively charged under the pH conditions at the time of dyeing as an electrostatic repulsion preventive agent.
- a substance that is positively charged under the pH conditions at the time of dyeing as an electrostatic repulsion preventive agent.
- the present invention is characterized by the following.
- (1) A method of dyeing keratin fibers using an oxidative dye and an oxidase capable of oxidizing the oxidative dye under a pH condition in which both the oxidase and the keratin fiber are negatively charged, and the pH at the time of dyeing the keratin fiber before dyeing
- a method of dyeing keratin fibers using an oxidative dye and an oxidase that can oxidize the oxidative dye under a pH condition in which both the oxidase and the keratin fiber are negatively charged, and positively charged in the pH condition during dyeing A method for dyeing keratin fibers using an agent containing at least an electrostatic repulsion inhibitor having properties and an oxidase.
- a method of dyeing keratin fibers using an oxidative dye and an oxidase capable of oxidizing the oxidative dye under a pH condition in which both the oxidase and the keratin fiber are negatively charged, and the pH at the time of dyeing the keratin fiber before dyeing A method for dyeing keratin fibers, which comprises treating with an electrostatic repulsion inhibitor having a property of being positively charged under conditions, and then using an agent containing at least the electrostatic repulsion inhibitor and oxidase.
- the electrostatic repulsion inhibitor is at least one selected from the group consisting of ⁇ -polylysine, polyquaternium-2, polyquaternium-7, poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] Method for dyeing keratin fibers.
- a staining agent for keratin fibers having a property of being electrically charged.
- the above keratin fiber dyeing agent which is a one-component formula comprising an electrostatic repulsion inhibitor, an oxidation dye, and an oxidase.
- the dye for keratin fibers as described above which is a two-component type containing an electrostatic repulsion inhibitor, and an oxidation dye and an oxidase separately.
- the above-mentioned keratin fiber dyeing agent which is a two-component type containing an electrostatic repulsion inhibitor and an oxidation dye, and an oxidase separately.
- the above keratin fiber dyeing agent which is a two-component type containing an electrostatic repulsion inhibitor and an oxidase and an oxidation dye separately.
- the above-mentioned keratin fiber dyeing agent which is a three-part formula containing an electrostatic repulsion inhibitor, an oxidation dye, and an oxidase separately.
- the electrostatic repulsion preventive agent when dyeing keratin fibers under pH conditions where both oxidase and keratin fibers are negatively charged, has the property of charging keratin fibers positively under the pH conditions during dyeing. Treatment, or using an agent containing at least an oxidase and the electrostatic repulsion inhibitor, or both, the charge amount of at least one of the oxidase and the keratin fiber is reduced, or on the plus side. It is charged and the electrostatic repulsive force is canceled or reduced, or conversely, the attractive force works.
- the oxidase and the keratin fiber do not repel or suck each other in the dyeing process, the oxidase oxidizes and polymerizes the oxidative dye in the vicinity of the keratin fiber.
- the colored oxidation dye is easily distributed in the vicinity of the keratin fibers, and is easily adsorbed and distributed on the keratin fibers, so that the dyeability is improved.
- the keratin fibers include fibers mainly composed of keratin such as hair and wool, and the hair includes wigs composed of hair in addition to hair.
- hair head hair
- hair will be described as an example of keratin fibers.
- the method for dyeing keratin fibers of the present invention is a method of dyeing keratin fibers under pH conditions in which both the oxidase and keratin fibers are negatively charged using an oxidative dye and an oxidase capable of oxidizing the oxidative dye, It is characterized by treating keratin fibers with an electrostatic repulsion inhibitor that is positively charged under the pH conditions at the time of dyeing, or using an agent containing at least an oxidase and the antistatic repulsion agent, or both.
- the staining agent for keratin fibers of the present invention contains an oxidative dye, an oxidase that can oxidize the oxidative dye, and an electrostatic repulsion preventive agent, and has the property that the oxidase is negatively charged under the pH conditions during dyeing.
- the electrostatic repulsion preventing agent has a property of being positively charged.
- Any oxidation dye that can oxidize oxidase can be used in the present invention, for example, phenylenediamines, indolines, indoles, phenols, catechols, hydroquinones, resorcins, trisone. Examples thereof include phenols and naphthalenes. Of these, phenylenediamines, indolines, and indoles are preferred.
- Paraphenylenediamines include paraphenylenediamine, 5-aminoorthocresol, orthoaminophenol, metaaminophenol, paraaminophenol, 2,4-diaminophenol, 2,6-diaminopyridine, and 5- (2-hydroxyethylamino).
- Indolines include indoline, 5,6-dihydroxyindoline, N-methyl-5,6-dihydroxyindoline, N-ethyl-5,6-dihydroxyindoline, N-butyl-5,6-dihydroxyindoline, 4-hydroxy -5-methoxyindoline, 6-hydroxy-7-methoxyindoline, 6,7-dihydroxyindoline, 4,5-dihydroxyindoline, 4-methoxy-6-hydroxyindoline, N-hexyl-5,6-dihydroxyindoline, 2 -Methyl-5,6-dihydroxyindoline, 3-methyl-5,6-dihydroxyindoline, 4-hydroxyindoline, 2,3-dimethyl-5,6-dihydroxyindoline, 2-methyl-5-ethyl-6-hydroxy Indoline, 2-methyl-5-hydro Si-6- ⁇ -hydroxyethylindoline, 4-hydroxypropylindoline, 2-hydroxy-3-methoxyind
- indoles examples include 4,5-dihydroxyindole, 5,6-dihydroxyindole, 6,7-dihydroxyindole, N-methyl-5,6-dihydroxyindole, N-ethyl-5,6-dihydroxyindole, N- Hexyl-5,6-dihydroxyindole, 2-methyl-5,6-dihydroxyindole, 3-methyl-5,6-dihydroxyindole, 4-hydroxyindole, 2,3-dimethyl-5,6-dihydroxyindole, 2 -Methyl-5-ethyl-6-hydroxyindole, 2-methyl-5-hydroxy-6- ⁇ -hydroxyethylindole, 4-hydroxypropylindole, 2-hydroxy-3-methoxyindole, 4-hydroxy-5-methoxy Indole, 6-hydroxy-7- Toxiindole, 6-hydroxy-5-methoxyindole, 6-hydroxyindole, 5-hydroxyindole, 7-hydroxyindo
- phenols examples include cresol and thymol
- examples of catechols include catechol, guaiacol, vanillin, and caffeic acid
- examples of triphenols include pyrogallol and esters thereof. These may be used alone or in combination of two or more as required.
- the oxidase that can be used in the present invention needs to be able to oxidize an oxidation dye.
- oxidase include multi-copper oxidase such as copper eflex oxidase (CueO), laccase, and bilirubin oxidase (BOD).
- the staining treatment is also performed at this pH.
- the isoelectric point of keratin fibers is about 3.0 to 5.5 and is usually around 3.7, keratin fibers are negatively charged when dyeing treatment is performed at the optimum pH.
- many oxidases that can oxidize oxidative dyes have low isoelectric points (for example, the isoelectric point of wild type BOD derived from Myrothecerium verrucaria is 4.1), and the oxidase is negatively charged when treated at the above optimum pH. To do.
- both the keratin fibers and the oxidase are negatively charged, and an electrostatic repulsive force acts between them, and this electrostatic repulsive force adversely affects the dyeability. .
- the present invention is characterized in that this electrostatic repulsion force is eliminated by treating with an electrostatic repulsion inhibitor.
- the electrostatic repulsion inhibitor means a substance having a property of being positively charged at the pH at which the dyeing treatment is performed.
- oligopeptides obtained by polymerizing basic amino acids, cationic polymers that have been blended in shampoos and hair conditioner products, or other cationic polymers can be used as an electrostatic repulsion inhibitor in the present invention. .
- oligopeptides preferable as the electrostatic repulsion preventing agent in the present invention include ⁇ -polylysine.
- a cationic polymer preferable as an electrostatic repulsion inhibitor in the present invention polyquaternium-2, polyquaternium-4, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-22, polyquaternium-39, Examples thereof include polyquaternium-51, polyquaternium-55, polyquaternium-64, polyquaternium-72, and the like.
- PA1 is represented by the following chemical formula (I).
- ⁇ -polylysine polyquaternium-2, polyquaternium-7, polyquaternium-72, and PA1 are more preferred.
- electrostatic repulsion preventing agents those that are easily adsorbed by the keratin fibers and that can positively charge the surface of the keratin fibers when adsorbed are preferable.
- Such an electrostatic repulsion inhibitor can be evaluated and selected by a simple test using a basic dye. That is, if the surface of the keratin fiber is positively charged by the electrostatic repulsion preventive agent, it becomes difficult to be dyed due to electrostatic repulsion with the positively charged basic dye. In other words, the electrostatic repulsion preventive agent that makes it difficult for the treated keratin fibers to be dye charges the surface of the keratin fibers positively. If this property is utilized, a preferable electrostatic repulsion inhibitor can be evaluated and selected.
- a hair bundle of human white hair (100%) is immersed in a 0.5% by weight solution of an electrostatic repulsion inhibitor to be evaluated for 5 minutes, then rinsed with running water at 40 ° C. for 30 seconds, air-dried and treated hair bundle. Get.
- the treated hair bundle was immersed in a 0.5% by weight basic blue 99 solution (pH adjusted to 6.81) for 10 minutes (bath ratio 1:10), then rinsed with running water at 40 ° C. for 30 seconds, and air-dried.
- To obtain a dyed hair bundle About the obtained dyed hair bundle, the color difference A with the untreated human white hair bundle in the Lab color system is measured.
- the untreated white hair bundle is dyed in the same manner as described above, and the color difference B between the stained hair bundle and the untreated white hair bundle is measured.
- a color difference A lower than the color difference B can be suitably used as the electrostatic repulsion preventing agent in the present invention.
- the difference between color difference A and color difference B (color difference B ⁇ color difference A) is preferably a positive value.
- dyes and pigments other than oxidation dyes may be used as necessary within a range not impairing the effects of the present invention.
- these dyes and pigments include tar pigments, HC dyes, basic dyes, direct dyes and the like, and these may be used alone or in combination of two or more as necessary.
- tar pigments include those specified by the Ministry of Health and Welfare Ordinance No. 30 “Ministerial Ordinance for Determining Tar Dyes that can be Used for Pharmaceuticals” promulgated on August 31, 1966.
- HC dye examples include HC blue 2, HC orange 1, HC red 1, HC red 3, HC yellow 2, HC yellow 4, and the like.
- basic blue 99, basic brown 16 , Basic brown 17, basic red 51, basic red 76, basic yellow 57, etc., and direct dyes include 2-amino-6-chloro-4-nitrophenol, 3-methylamino-4- Nitrophenoxyethanol, 2-amino-3-nitrophenol, 4-hydroxypropylamino-3-nitrophenol and the like can be mentioned. These may be used alone or in combination of two or more as required.
- surfactants include cationic surfactants such as lauryltrimethylammonium chloride and stearyltrimethylammonium chloride; polyoxyethylene cetyl ether, polyoxyethylene oleyl ether, polyoxyethylene behenyl ether, polyoxyethylene castor oil, polyoxyethylene castor oil, Nonionic surfactants such as oxyethylene hydrogenated castor oil and sorbitan stearate; oil agents such as cetyl alcohol, cetostearyl alcohol, stearyl alcohol, petrolatum, paraffin, liquid paraffin, cetyl palmitate, octyl palmitate; xanthan gum, succinoglucan , Guar gums such as hydroxypropyl guar gum, cationized guar gum, carboxymethyl cellulose,
- the dyeing agent for keratin fibers of the present invention may be a single agent type or a multi-agent type. In the present invention, even if an oxidative dye and an oxidase are mixed, color does not develop unless oxygen is present.
- a multi-agent type in which an electrostatic repulsion inhibitor and an oxidase are separately included for example, a two-part type consisting of a first agent containing an electrostatic repulsion inhibitor and a second agent containing an oxidation dye and an oxidase, It can be set as the 2 agent type which consists of the 1st agent containing an inhibitor and an oxidation dye, and the 2nd agent containing oxidase.
- the dosage form can also be any form such as liquid, emulsion, cream, gel, foam, aerosol, etc.
- the container can also be in a bag, bottle, pump container, tube, spray can Anything can be adopted.
- the keratin fibers are treated with an electrostatic repulsion inhibitor, or the agent containing at least the electrostatic repulsion inhibitor and oxidase is used, or both of them.
- the method for incorporating an electrostatic repulsion inhibitor into the agent containing oxidase is not particularly limited as long as part or all of the charge of the oxidase is neutralized by the electrostatic repulsion inhibitor. What is necessary is just to add an anti-electric repulsion agent and to stir uniformly and to leave for a fixed time.
- the oxidase is negatively charged at the optimum pH of the oxidase, and the electrostatic repulsion inhibitor is positively charged. It is believed that the inhibitor molecules are electrostatically adsorbed and form a complex. As a result, depending on the amount of the electrostatic repulsion inhibitor, the overall charge of the composite is almost zero, or slightly plus or minus.
- the method of treating the keratin fibers with the electrostatic repulsion inhibitor is not particularly limited as long as a part or all of the charge on the surface of the keratin fibers is neutralized.
- a solution of the electrostatic repulsion inhibitor is sprayed on the keratin fibers.
- a method of volatilizing a part or all of the solvent as needed can be exemplified.
- the electrostatic repulsion preventing agent is electrostatically adsorbed to the keratin fibers, and the surface of the keratin fibers is coated with the electrostatic repulsion preventing agent to form a composite.
- the overall charge of the composite is almost zero, or slightly plus or minus.
- both oxidase and keratin fibers are positively charged as a whole complex.
- oxidase and keratin fiber are electrostatically repelled and dyeability is deteriorated. Therefore, when an anti-repulsion agent is contained in an agent containing oxidase and keratin fibers are treated with an anti-repulsion agent, preferably the oxidase is used so that the amount of treatment with the anti-repulsion agent is not excessive. It is preferable that the amount of the composite of the anti-static repulsion agent and the composite of the keratin fiber and the anti-static repulsion agent is such that the charge is zero.
- treating the keratin fiber with an anti-electrostatic repulsion agent can cause the entire complex to be more strongly and positively charged and dye it more vividly than the anti-repulsion agent is added to the oxidase-containing agent. Therefore, it is preferable to treat only keratin fibers with an electrostatic repulsion inhibitor.
- the hair repellent (a) of human white hair (100%) (model number: BM-WA, distributor: Beaulux Co., Ltd.) After being immersed in a 5% solution for 5 minutes at room temperature (23.5 ° C.), it was washed with running water at 40 ° C. for 30 seconds and air-dried to obtain a treated hair bundle (b).
- Table 1 shows the type of electrostatic repulsion inhibitor to be evaluated, the isoelectric point, and the pH of the solution.
- a 0.1 mol / L citric acid solution and 0.2 mol / L disodium hydrogen phosphate were mixed at a ratio of 6.5: 43.6 to prepare a pH 6.81 buffer solution.
- a staining solution was prepared by mixing 5% basic blue 99.
- the treated hair bundle (b) treated with the electrostatic repulsion inhibitor in 10 ml of this dyeing solution was immersed for 10 minutes at room temperature (23.5 ° C.) (bath ratio 1:10), and then washed with 40 ° C. running water. Washed for 30 seconds and air-dried to obtain a dyed hair bundle (c1).
- Example 1 A two-agent type keratin fiber dyeing agent comprising a first agent containing an electrostatic repulsion preventing agent and a second agent containing 5,6-dihydroxyindole and oxidase as dye intermediates was prepared.
- the first agent is a 0.5% aqueous solution (pH 6.65) of poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] (PA1, source: Nikka Chemical Co., Ltd.) as an electrostatic repulsion inhibitor. It is.
- the second agent contains 2 g of polyoxyethylene hydrogenated castor oil, 1 g of lactic acid, 0.9 g of monoethanolamine, and 0.3 g of 5,6-dihydroxyindole in an anaerobic environment.
- bilirubin oxidase product name: BO-3, isoelectric point: 4.1, concentration at the time of use of 2 units / g) manufactured by Amano Enzyme Co., Ltd. was added as an oxidase to the mixture.
- the pH of the second agent is 7.3.
- Example 2 A keratin fiber staining agent was obtained in the same manner as in Example 1 except that the first agent was 0.5% aqueous solution (pH 9.69) of ⁇ -polylysine (manufactured by Ichimaru Falcos, product name: polylysine 10).
- Example 3 Polyquaternium-2 (manufactured by Sigma-Aldrich Japan G. K., trade name: poly [bis (2-chloroethyl) ether-alt-1.3-bis [3- (dimethylamino) propyl] urea)
- a keratin fiber staining agent was obtained in the same manner as in Example 1 except that a 0.5% aqueous solution (pH 7.2) was used.
- Example 4 A staining agent for keratin fibers was obtained in the same manner as in Example 1 except that the first agent was 0.5% aqueous solution (pH 6.82) of Polyquaternium-7 (manufactured by Senka Co., Ltd., trade name: Cosmote VH). .
- Example 5 A keratin fiber staining agent was prepared in the same manner as in Example 1 except that the first agent was 0.5% aqueous solution (pH 5.47) of Polyquaternium-72 (trade name: Mill Style CP, manufactured by Croda Japan Co., Ltd.). Obtained.
- Examples 6 and 7 Staining for keratin fibers in the same manner as in Examples 1 and 3 except that laccase (manufactured by Amano Enzyme, product name: M120, isoelectric point: 3.0) was used as the second agent oxidase instead of bilirubin oxidase. An agent was obtained.
- laccase manufactured by Amano Enzyme, product name: M120, isoelectric point: 3.0
- Table 2 summarizes the electrostatic repulsion inhibitor used for the first agent and the oxidase used for the second agent.
- Examples 8 to 14 (Dyed hair 1) Using the dyes for keratin fibers of Examples 1 to 7 described above, a hair dye test was performed on a 1 g hair bundle (model number: BM-WA, sold by Beaulux) of human white hair (100%). went. First, as a pretreatment, the hair bundle is washed with running water at about 40 ° C. for 30 seconds, washed with 1% SDS (sodium dodecyl sulfate) solution for 1 minute, and again washed with running water at about 40 ° C. for 30 seconds. The liquid was washed off and then air-dried.
- SDS sodium dodecyl sulfate
- the hair bundle was immersed in the solution for 5 minutes at room temperature (23.5 ° C.), then washed with running water at 40 ° C. for 30 seconds and air-dried.
- 2.0 g of the second agent was weighed and applied to the hair bundle with a brush. The hair bundle was spread in a fan shape so that it could be applied as uniformly as possible. After coating, the mixture was allowed to stand at room temperature (23.5 ° C.) for 10 minutes, and then the hair bundle was turned over. Similarly, the second agent was spread evenly with a brush, and further allowed to stand at room temperature for 10 minutes. Thereafter, the hair bundle is washed with running water at about 40 ° C.
- Examples 15 to 21 The hair bundle was dyed in the same manner as in Examples 8 to 14 except that the treatment with the first agent was changed to the following method, and the color difference ⁇ E with the untreated white hair bundle was measured.
- Table 3 shows the used staining agents and the measurement results.
- the treatment with the first agent was performed by applying the first agent to the hair bundle after the pretreatment so as to have a bath ratio of 5: 1 (0.2 g with respect to 1 g of the hair bundle) and air drying.
- Comparative Example 1 The hair bundle was dyed in the same manner as in Example 8 except that the treatment with the first agent was not performed, and the color difference ⁇ E in the Lab color system was measured. Table 3 shows the measurement results.
- the effect of the treatment with the electrostatic repulsion preventive agent can be performed with or without washing away the first agent (electrostatic repulsion preventive agent). Is recognized. In addition, since there are electrostatic repulsion preventing agents having different effects, it may be used by appropriately selecting whether to wash away or not wash away.
- Example 22 The hair bundle was dyed in the same manner as in Example 8 except that PA1 was added to the second agent so that the concentration was 0.5%, and the color difference ⁇ E in the Lab color system was measured. Table 4 shows the measurement results.
- Example 23 The hair bundle was dyed in the same manner as in Example 22 except that the treatment with the first agent was not performed, and the color difference ⁇ E in the Lab color system was measured. Table 4 shows the measurement results.
- Comparative Example 2 The hair bundle was dyed in the same manner as in Example 8 except that the treatment with the first agent was not performed, and the color difference ⁇ E in the Lab color system was measured. Table 4 shows the measurement results.
- Example 22 in which the hair bundle (keratin fiber) was treated with the electrostatic repulsion inhibitor of the first agent and the electrostatic repulsion inhibitor was blended with the second agent containing the dye and oxidase, It can be seen that the color difference ⁇ E is larger than that of Comparative Example 2 in which no anti-electric repulsion agent is blended, and the dyeability is excellent. This is considered to be because the electrostatic repulsion of the hair bundle and oxidase was almost eliminated by the electrostatic repulsion inhibitor.
- the hair bundle was not treated with the electrostatic repulsion inhibitor that is the first agent, and Example 23 in which the electrostatic repulsion inhibitor was blended with the second agent containing the dye and oxidase, and the hair bundle was treated with the static of the first agent.
- Example 8 where the anti-repulsion agent was treated with the anti-repulsion agent and the anti-repulsion agent was not added to the second agent, the hair bundle was treated with the anti-repulsion agent of the first agent and the second agent was electrostatically charged. It can be seen that the color difference ⁇ E is larger than that of Example 22 in which the anti-repulsion agent is blended, and the dyeability is further excellent.
- Example 8 in which the hair bundle was treated with the electrostatic repulsion inhibitor had a larger color difference ⁇ E and dyeability than Example 23 in which the electrostatic repulsion inhibitor was added to the second agent containing the dye and oxidase. It turns out that it is the best. This is considered to be because even when the same electrostatic repulsion inhibitor is used, the hair bundle is more easily charged positively than the oxidase, and the electrostatic adsorption force becomes stronger.
- Example 24 A two-agent type keratin fiber dyeing agent comprising a first agent containing an electrostatic repulsion preventing agent and a second agent containing paraphenylenediamine and oxidase as dye intermediates was prepared.
- the first agent was 0.5% of poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] (PA1, source: Nikka Chemical Co., Ltd.) as an electrostatic repulsion inhibitor. It is an aqueous solution (pH 6.65).
- the second agent contains 2 g of polyoxyethylene hydrogenated castor oil, 1 g of lactic acid, an appropriate amount of monoethanolamine (adjusted to around pH 6) and 0.5 g of paraphenylenediamine in an anaerobic environment, and purified water to a total of 65 g.
- the bilirubin oxidase manufactured by Amano Enzyme product name: BO-3, isoelectric point: 4.1, concentration at the time of use is 2 units / g) is added.
- the final pH of the second agent is 6.08.
- Example 25 A keratin fiber staining agent was obtained in the same manner as in Example 24 except that the second agent was adjusted with monoethanolamine so as to have a pH of around 7. The final pH of the second agent is 7.02.
- Examples 26 and 27 Using the keratin fiber dyes of Examples 24 and 25 described above, the hair bundle was dyed in the same manner as in Examples 8 to 14 (hair dye 1), and the color difference ⁇ E in the Lab color system was measured. Table 5 shows the measurement results.
- the method for dyeing keratin fibers and the dyeing agent for keratin fibers of the present invention contains an electrostatic repulsion preventive agent, oxidase is not electrostatically repelled by keratin fibers or is preferably reduced.
- the oxidative dye is oxidized to develop color and adsorb to the keratin fibers, so that it has excellent dyeability. In addition, there is little damage and rash on hair and scalp.
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Abstract
Description
このような問題を解消するため、近年では過酸化水素に替えてマルチ銅オキシダーゼの一種であるラッカーゼを配合したケラチン繊維用染色剤が提案されている(特許文献1、2)。
詳述すれば、双方がマイナスに強く帯電していれば染色工程においてオキシダーゼとケラチン繊維は互いに反発するので、オキシダーゼはケラチン繊維から離れた位置で酸化染料を酸化発色させることになり、結局、発色した酸化染料分子はケラチン繊維からは遠く離れた位置に分布すると考えられる。従って、発色した酸化染料がケラチン繊維に吸着・分配されにくくなり、染色後に薬液を洗い流す際に発色した酸化染料分子の多くが洗い流されてしまっていると推察される。
即ち本発明は、上記従来技術の問題点を解消し、染色時のpH条件においてプラスに帯電する物質を静電反発防止剤として使用することにより、オキシダーゼとケラチン繊維の間の静電反発力を打ち消し、これにより頭髪用として使用した場合でも使用時に毛髪や頭皮を損傷せず、かぶれが少ないだけでなく、染毛性に優れたケラチン繊維の染色方法及びケラチン繊維用染色剤を提供することを目的とする。
(1)酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、染色前にケラチン繊維を染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤により処理するケラチン繊維の染色方法。
(2)酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤とオキシダーゼとを少なくとも含有する剤を用いるケラチン繊維の染色方法。
(3)酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、染色前にケラチン繊維を染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤により処理し、次いで前記静電反発防止剤とオキシダーゼとを少なくとも含有する剤を用いるケラチン繊維の染色方法。
(4)静電反発防止剤がε-ポリリジン、ポリクオタニウム-2、ポリクオタニウム-7、ポリ[オキシエチレン(ジメチルイミノ)プロピル(ジメチルイミノ)エチレン]よりなる群から選択される少なくとも1種である上記のケラチン繊維の染色方法。
(5)静電反発防止剤と、酸化染料と、当該酸化染料を酸化できるオキシダーゼとからなり、染色時のpH条件において、オキシダーゼはマイナスに帯電する性質を有し、静電反発防止剤がプラスに帯電する性質を有するケラチン繊維用染色剤。
(6)静電反発防止剤と酸化染料とオキシダーゼとを含有する一剤式である上記のケラチン繊維用染色剤。
(7)静電反発防止剤と、酸化染料及びオキシダーゼとを別に含有する二剤式である上記のケラチン繊維用染色剤。
(8)静電反発防止剤及び酸化染料と、オキシダーゼとを別に含有する二剤式である上記のケラチン繊維用染色剤。
(9)静電反発防止剤及びオキシダーゼと、酸化染料とを別に含有する二剤式である上記のケラチン繊維用染色剤。
(10)静電反発防止剤と、酸化染料と、オキシダーゼとを別に含有する三剤式である上記のケラチン繊維用染色剤。
本発明のケラチン繊維の染色方法は、酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、染色前にケラチン繊維を染色時のpH条件においてプラスに帯電する静電反発防止剤にて処理すること、又はオキシダーゼと前記静電反発防止剤とを少なくとも含む剤を用いる、又はそれらの両方を特徴とする。
本発明のケラチン繊維用染色剤は、酸化染料と当該酸化染料を酸化できるオキシダーゼと、静電反発防止剤が配合されており、染色時のpH条件において、オキシダーゼはマイナスに帯電する性質を有し、静電反発防止剤がプラスに帯電する性質を有することを特徴とする。
パラフェニレンジアミン類としては、パラフェニレンジアミン、5-アミノオルトクレゾール、オルトアミノフェノール、メタアミノフェノール、パラアミノフェノール、2,4-ジアミノフェノール、2,6-ジアミノピリジン、5-(2-ヒドロキシエチルアミノ)-2-メチルフェノール、N,N-ビス(β-ヒドロキシ)-パラフェニレンジアミン硫酸塩、パラニトロ-オルトフェニレンジアミン、パラニトロ-2′,4′-ジアミノアゾベンゼン硫酸ナトリウム、トルエン-2,5-ジアミン、5-アミノオルトクレゾール硫酸塩、パラアミノフェノール硫酸塩、オルトクロロ-パラフェニレンジアミン硫酸塩、4,4′-ジアミノジフェニルアミン硫酸塩、パラメチルアミノフェノール硫酸塩、パラフェニレンジアミン硫酸塩、メタフェニレンジアミン硫酸塩、トルエン-2,5-ジアミン硫酸塩、2,4-ジアミノフェノキシエタノール塩酸塩、トルエン-2,5-ジアミン塩酸塩、メタフェニレンジアミン塩酸塩、2,4-ジアミノフェノール塩酸塩、3,3′-イミノジフェノール、パラフェニレンジアミン塩酸塩、N-フェニル-パラフェニレンジアミン塩酸塩、N-フェニル-パラフェニレンジアミン酢酸塩、1,5-ジヒドロキシナフタレン、トリレン-3,4-ジアミン、パラメチルアミノフェノール、N,N′-ビス(4-アミノフェニル)-2,5-ジアミノ-1,4-キノンジイミン、オルトアミノフェノール硫酸塩、2,4-ジアミノフェノール硫酸塩、メタアミノフェノール硫酸塩等が挙げられるが、これらの中でも基質特異性の関係で、特にパラフェニレンジアミン、パラアミノフェノール、オルトアミノフェノール、2,4-ジアミノフェノール、トルエン-2,5-ジアミンおよびこれらの塩等が好ましい。これらは単独で又は必要に応じ2種以上組み合わせて用いられる。
また、本発明における静電反発防止剤として好ましいカチオン性ポリマーとしては、ポリクオタニウム-2、ポリクオタニウム-4、ポリクオタニウム-6、ポリクオタニウム-7、ポリクオタニウム-10、ポリクオタニウム-11、ポリクオタニウム-22、ポリクオタニウム-39、ポリクオタニウム-51、ポリクオタニウム-55、ポリクオタニウム-64、ポリクオタニウム-72等が例示できる。
また、本発明における静電反発防止剤として好ましいその他のカチオン性ポリマーとしては、酵素の安定剤として開発されたポリ[オキシエチレン(ジメチルイミノ)プロピル(ジメチルイミノ)エチレン](以下、このカチオン性ポリマーを、PA1と略すことがある)等が例示できる。PA1は下記の化学式(I)で表わされる。
即ち、静電反発防止剤によりケラチン繊維の表面がプラスに荷電されていれば、同じくプラスに荷電された塩基性染料と静電反発して染色されにくくなる。逆に言えば、処理されたケラチン繊維が塩基性染料に染色されにくくなる静電反発防止剤が、ケラチン繊維の表面をプラスに荷電させていることになる。この性質を利用すれば、好ましい静電反発防止剤を評価、選別できる。
まず人毛白髪(100%)の毛束を評価対象の静電反発防止剤の0.5重量%溶液に5分間浸漬した後、40℃の流水で30秒間洗い流し、風乾させて処理済み毛束を得る。
この処理済み毛束を塩基性青99の0.5重量%溶液(pHは6.81に調整)に10分間浸漬(浴比1:10)した後、40℃の流水で30秒間洗い流し、風乾させて染色毛束を得る。得られた染色毛束についてLab表色系における未処理の人毛白髪毛束との色差Aを測定する。
未処理の人毛白髪毛束についても上記と同様に染色し、染色毛束と未処理の人毛白髪毛束の色差Bを測定する。
上記のように測定された色差Aと色差Bを比較して、色差Aが色差Bよりも低いものが本発明における静電反発防止剤として好適に使用できる。色差Aと色差Bの差(色差B-色差A)は正の値が好ましい。
このようなタール色素としては、昭和41年8月31日公布の厚生省令第30号「医薬品等に使用することができるタール色素を定める省令」によって指定されている色素が挙げられる。また、HC染料としては、HC青2、HC橙1、HC赤1、HC赤3、HC黄2、HC黄4等が挙げられ、塩基性染料としては、塩基性青99、塩基性茶16、塩基性茶17、塩基性赤51、塩基性赤76、塩基性黄57等が挙げられ、直接染料としては、2-アミノ-6-クロロ-4-ニトロフェノール、3-メチルアミノ-4-ニトロフェノキシエタノール、2-アミノ-3-ニトロフェノール、4-ヒドロキシプロピルアミノ-3-ニトロフェノール等が挙げられる。これらは単独で又は必要に応じ2種以上組み合わせて用いられる。
例えば、界面活性剤としては、塩化ラウリルトリメチルアンモニウム、塩化ステアリルトリメチルアンモニウム等のカチオン性界面活性剤;ポリオキシエチレンセチルエーテル、ポリオキシエチレンオレイルエーテル、ポリオキシエチレンベヘニルエーテル、ポリオキシエチレンヒマシ油、ポリオキシエチレン硬化ヒマシ油、ステアリン酸ソルビタン等のノニオン性界面活性剤;セチルアルコール、セトステアリルアルコール、ステアリルアルコール、ワセリン、パラフィン、流動パラフィン、パルミチン酸セチル、パルミチン酸オクチル等の油剤;キサンタンガム、サクシノグルカン、ヒドロキシプロピルグァーガム、カチオン化グァーガム等のグァーガム類、カルボキシメチルセルロース、ヒドロキシエチルセルロース、カチオン化セルロース等のセルロース類等の増粘剤;1,3-BG、PG、DPG、グリセリン等の保湿剤;EDTA、EDTA-2Na、EDTA-4Na、ヒドロキシエタンジホスホン酸等のキレート剤;パラベン、メチルイソチアゾリノン等の防腐剤;エタノール、イソプロピルアルコール等の溶剤;香料等で、これらは必要に応じ、任意に組み合わせて適宜配合することができる。
剤型も液状、乳液状、クリーム状、ジェル状、泡状、エアロゾル状等、任意の剤型とすることができ、容器も袋入り、瓶入り、ポンプ式容器入り、チューブ入り、噴霧缶入り等、どのようなものでも採用できる。
オキシダーゼを含む剤に静電反発防止剤を含有させる方法は、オキシダーゼの電荷のうち一部又は全部が静電反発防止剤により中和される限り特に限定されないが、例えばオキシダーゼを含む酵素液に静電反発防止剤を加え、均一に撹拌して一定時間放置すればよい。上述の通り、オキシダーゼの至適pHにおいてオキシダーゼはマイナスに荷電しており、静電反発防止剤はプラスに荷電しているので、上記の操作により、酵素液中で浮遊するオキシダーゼ分子と静電反発防止剤分子は静電的に吸着され、複合体を形成すると考えられる。その結果、静電反発防止剤の量にもよるが、複合体の電荷は全体としてほぼゼロか、わずかなプラスあるいはマイナスとなる。
まず、人毛白髪(100%)(型番:BM-W-A、販売元:ビューラックス社)の毛束(a)を評価対象の静電反発防止剤の0.5%溶液に5分間、室温(23.5℃)で浸漬した後、40℃の流水で30秒間洗い流し、風乾させて処理済み毛束(b)を得た。評価対象の静電反発防止剤の種類、等電点、及び溶液のpHについては、表1に示す。
この染色液10mlに上記静電反発防止剤で処理した処理済み毛束(b)を10分間、室温(23.5℃)で浸漬(浴比1:10)した後、40℃の流水で約30秒間洗い流し、風乾させて染色毛束(c1)を得た。得られた染色毛束(c1)及び人毛白髪毛束(a)について、コニカミノルタ製の分光測色計CM-2600dでLab表色系における染色毛束(c1)と未処理の人毛白髪毛束(a)との色差Aを測定した。
静電反発防止剤で処理していない未処理の人毛白髪毛束(a)についても上記と同様に染色して染色毛束(c2)を得て、Lab表色系における染色毛束(c2)と未処理の人毛白髪毛束(a)との色差Bを測定した。
各静電反発防止剤について測定した色差A、色差B、及び色差Aと色差Bの差(色差B-色差A)を表1に示す。
静電反発防止剤を含む第1剤と、染料中間体として5,6-ジヒドロキシインドール及びオキシダーゼを含む第2剤からなる2剤式のケラチン繊維用染色剤を作成した。
第1剤は、静電反発防止剤としてポリ[オキシエチレン(ジメチルイミノ)プロピル(ジメチルイミノ)エチレン](PA1、入手先:日華化学(株))の0.5%水溶液(pH6.65)である。
第2剤は、嫌気的環境下でポリオキシエチレン硬化ひまし油2g、乳酸1g、モノエタノールアミン0.9g、5,6-ジヒドロキシインドール0.3gを含み、これに合計65gになるように精製水を加えて混合したものに、オキシダーゼとして天野エンザイム社製のビリルビンオキシダーゼ(製品名:BO-3、等電点:4.1、使用時の濃度は2units/g)を加えたものである。なお、第2剤のpHは7.3である。
第1剤をε-ポリリジン(一丸ファルコス社製、製品名:ポリリジン10)の0.5%水溶液(pH9.69)とした他は実施例1と同様にしてケラチン繊維用染色剤を得た。
第1剤をポリクオタニウム-2(Sigma-Aldrich Japan G. K. 社製、商品名:ポリ[ビス (2-クロロエチル) エーテル-alt-1.3-ビス[3- (ジメチルアミノ) プロピル]尿素] 、四級化体溶液)の0.5%水溶液(pH7.2)とした他は実施例1と同様にしてケラチン繊維用染色剤を得た。
第1剤をポリクオタニウム-7(センカ(株)製、商品名:コスモートVH)の0.5%水溶液(pH6.82)とした他は実施例1と同様にしてケラチン繊維用染色剤を得た。
第1剤をポリクオタニウム-72(クローダジャパン(株)製、商品名:ミルスタイルCP)の0.5%水溶液(pH5.47)とした他は実施例1と同様にしてケラチン繊維用染色剤を得た。
第2剤のオキシダーゼとして、ビリルビンオキシダーゼに代えてラッカーゼ(天野エンザイム社製、製品名:M120、等電点:3.0)を用いた他は実施例1、3と同様にしてケラチン繊維用染色剤を得た。
上記した実施例1~7のケラチン繊維用染色剤を用い、人毛白髪(100%)の1g毛束(型番:BM-W-A、販売元:ビューラックス社)に対して染毛試験を行った。
まず、前処理として、毛束を約40℃の流水で30秒間水洗いして、1%SDS(ドデシル硫酸ナトリウム)液で1分間もみ洗いし、再び約40℃の流水で30秒間水洗いしてSDS液を洗い流した後、風乾した。
次に、第1剤を10mlとり、その中に上記風乾した毛束を5分間、室温(23.5℃)で浸漬した後、40℃の流水で30秒間洗い流し、風乾させた。
次に、第2剤2.0gを秤量し、刷毛で毛束に塗布した。毛束は扇状になるように広げ、できるだけ均一に塗布できるようにした。
塗布後、室温(23.5℃)で10分後放置した後、毛束を裏返して、同様にして第2剤を刷毛で均一に広げ、さらに室温で10分間放置した。
その後、毛束を約40℃の流水で30秒間水洗してケラチン繊維用染色剤を洗い流し、1%SDS液を塗布してコームで20回櫛通しして泡立てた後、約40℃の流水で流しながらコームで20回櫛通しして1%SDS液を洗い流した。洗浄後、水分をタオルで拭き取り、乾燥させた。
乾燥後の染色毛束について、分光測色計(コニカミノルタ製、CM-2600d)でLab表色系における未処理の人毛白髪毛束との色差ΔEを測定した。使用した染色剤及び測定結果を表3に示す。
第1剤による処理を以下の方法に変えたほかは実施例8~14と同様にして毛束を染色し、未処理の人毛白髪毛束との色差ΔEを測定した。使用した染色剤及び測定結果を表3に示す。
第1剤による処理は、前処理後の毛束に浴比5:1(1g毛束に対して0.2g)となるように第1剤を塗布し、風乾することにより行った。
第1剤による処理をしなかった他は上記実施例8と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表3に示す。
第2剤にもPA1を濃度が0.5%になるように配合した他は実施例8と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表4に示す。
第1剤による処理をしなかった他は上記実施例22と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表4に示す。
第1剤による処理をしなかった他は上記実施例8と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表4に示す。
また、毛束を第1剤である静電反発防止剤で処理せず、染料とオキシダーゼを含む第2剤に静電反発防止剤を配合した実施例23、及び毛束を第1剤の静電反発防止剤で処理し、第2剤に静電反発防止剤を配合しなかった実施例8は、毛束を第1剤の静電反発防止剤で処理するとともに、第2剤に静電反発防止剤を配合した実施例22よりも更に色差ΔEが大きく、染色性が更に優れていることが判る。これは、毛束を静電反発防止剤で処理するとともに、第2剤に静電反発防止剤を配合すれば毛束とオキシダーゼの両方がプラスに荷電され、弱いながらも静電反発力が発生するのに対し、片方だけを処理すれば一方がプラス、他方がマイナスに荷電されて、毛束とオキシダーゼの間に静電吸着力が働くからであると考えられる。
さらに、毛束を静電反発防止剤で処理しただけの実施例8が染料とオキシダーゼを含む第2剤に静電反発防止剤を配合した実施例23よりも更に色差ΔEが大きく、染色性が最も優れていることが判る。これは、同じ静電反発防止剤を用いても、オキシダーゼよりも毛束のほうがプラスに荷電され易く、静電吸着力が強くなるからであると考えられる。
静電反発防止剤を含む第1剤と、染料中間体としてパラフェニレンジアミン及びオキシダーゼを含む第2剤からなる2剤式のケラチン繊維用染色剤を作成した。
第1剤は、実施例1と同じく、静電反発防止剤としてポリ[オキシエチレン(ジメチルイミノ)プロピル(ジメチルイミノ)エチレン](PA1、入手先:日華化学(株))の0.5%水溶液(pH6.65)である。
第2剤は、嫌気的環境下でポリオキシエチレン硬化ひまし油2g、乳酸1g、モノエタノールアミン適量(pH6付近に調整)、パラフェニレンジアミン0.5gを含み、これに合計65gになるように精製水を加えて混合したものに、オキシダーゼとして天野エンザイム社製のビリルビンオキシダーゼ(製品名:BO-3、等電点:4.1、使用時の濃度は2units/g)を加えたものである。なお、第2剤の最終的なpHは6.08である。
第2剤において、モノエタノールアミンにてpH7付近になるように調整した他は実施例24と同様にして、ケラチン繊維用染色剤を得た。なお、第2剤の最終的なpHは7.02である。
上記した実施例24、25のケラチン繊維用染色剤を用い、実施例8~14(染毛1)と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表5に示す。
第1剤による処理をしなかった他は上記実施例26、27と同様にして毛束を染色し、Lab表色系における色差ΔEを測定した。測定結果を表5に示す。
Claims (10)
- 酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、
染色前にケラチン繊維を染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤により処理することを特徴とするケラチン繊維の染色方法。 - 酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、
染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤とオキシダーゼとを少なくとも含有する剤を用いることを特徴とするケラチン繊維の染色方法。 - 酸化染料と当該酸化染料を酸化できるオキシダーゼを用い、オキシダーゼとケラチン繊維の両方がマイナスに帯電するpH条件でケラチン繊維を染色する方法であって、
染色前にケラチン繊維を染色時のpH条件においてプラスに帯電する性質を有する静電反発防止剤により処理し、次いで前記静電反発防止剤とオキシダーゼとを少なくとも含有する剤を用いることを特徴とするケラチン繊維の染色方法。 - 静電反発防止剤がε-ポリリジン、ポリクオタニウム-2、ポリクオタニウム-7、ポリクオタニウム-72、ポリ[オキシエチレン(ジメチルイミノ)プロピル(ジメチルイミノ)エチレン]よりなる群から選択される少なくとも1種であることを特徴とする請求項1乃至3のいずれか1項に記載のケラチン繊維の染色方法。
- 静電反発防止剤と、酸化染料と、当該酸化染料を酸化できるオキシダーゼとからなり、
染色時のpH条件において、オキシダーゼはマイナスに帯電する性質を有し、静電反発防止剤がプラスに帯電する性質を有することを特徴とするケラチン繊維用染色剤。 - 静電反発防止剤と酸化染料とオキシダーゼとを含有する一剤式であることを特徴とする請求項5に記載のケラチン繊維用染色剤。
- 静電反発防止剤と、酸化染料及びオキシダーゼとを別に含有する二剤式であることを特徴とする請求項7に記載のケラチン繊維用染色剤。
- 静電反発防止剤及び酸化染料と、オキシダーゼとを別に含有する二剤式であることを特徴とする請求項5に記載のケラチン繊維用染色剤。
- 静電反発防止剤及びオキシダーゼと、酸化染料とを別に含有する二剤式であることを特徴とする請求項5に記載のケラチン繊維用染色剤。
- 静電反発防止剤と、酸化染料と、オキシダーゼとを別に含有する三剤式であることを特徴とする請求項5に記載のケラチン繊維用染色剤。
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