Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
  • A61K8/466—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfonic acid derivatives; Salts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
• • 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
  • A61K8/55—Phosphorus compounds
• • 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
  • A61Q5/04—Preparations for permanent waving or straightening the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/24—Thermal properties
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/52—Stabilizers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
  • A61K2800/88—Two- or multipart kits

Definitions

• This invention relates to a extremely curly hair correction process involving reduction of hair keratin, a process for maintaining or restoring the thus-corrected state, and compositions for use in these processes.
• An object of the present invention is to solve these conventional problems and to provide a hair treatment process having a very high extremely curly hair correcting effect and very high persistency of the effect. Another object is to provide a process for easily achieving maintenance and restoration of the extremely curly hair correcting effect, which has been imparted by practicing the hair treatment process, without giving a damage to the hair. A further object is to provide compositions for use in these hair treatment processes.
• the present inventors have found that a extremely curly hair correcting effect and persistency of the effect, which are higher than those available from the conventional straight perms, can be obtained when, in a state that the hair structure is relaxed by reductive cleavage of disulfide bonds in the hair in the course of a so-called permanent treatment making use of a first-pack composition with a hair keratin reducing substance contained therein and a second-pack composition with an oxidizing agent contained therein, an organic acid having a specific structure is applied and the pH is then controlled to 1 to 5 with a buffering agent to have the organic acid absorbed in a large amount in hair.
• the present inventors have also found that this process makes it possible to obtain a high extremely curly hair correcting effect even only by a simple shaping action such as combing and further that use of a heating device such as a high-temperature iron can obtain a still higher extremely curly hair correcting effect. Further, the present inventors have also found that, when hair is wound on rods as a styling action or otherwise styled to impart waves to the hair, neatly styled curling is feasible even if the hair has significant natural curliness or curliness, because the hair is styled into curls while the natural curliness or curliness is being corrected.
• the present inventors have also found that the extremely curly hair correcting effect can be easily maintained or restored without giving a damage to the hair by causing an aqueous treatment composition—which contains an organic acid having a specific structure or a salt thereof, has buffer capacity and has a pH of from 1 to 5—to act on the hair previously subjected to extremely curly hair correction by the above-described method.
• an aqueous treatment composition which contains an organic acid having a specific structure or a salt thereof, has buffer capacity and has a pH of from 1 to 5—to act on the hair previously subjected to extremely curly hair correction by the above-described method.
• the present invention provides a hair treatment process comprising the following steps (1-1) to (1-4) in at least one of which shaping of hair is conducted with optional use of a heating device as needed, and at least one of a first pack and a second pack comprising the following organic acid (A) or a salt thereof:
• Organic acid (A) a compound comprising a non-aromatic hydrophobic group having a total carbon number of from 3 to 11 or an aromatic hydrophobic group having a total carbon number of from 4 to 18 and an acidic group selected from a sulfo group, sulfate ester group, sulfino group, sulfeno group, phosphono group, phosphate ester group or phosphinico group.
• the present invention also provides a hair treatment process comprising the following steps (2-1) to (2-5) in at least one of which shaping of hair is conducted with optional use of a heating device as needed, and at least one of a first pack and an intermediate treatment comprising the organic acid (A) or salt thereof:
• the present invention also provides an aqueous composition, which is the first pack for use in any one of the above-described hair treatment processes, comprises 0.1 to 40 wt. % of the organic acid (A) or salt thereof and 0.1 to 20 wt. % of the hair keratin reducing substance, and has a pH of from 5 to 11.
• the present invention also provides an aqueous composition, which is the second pack for use in any one of the above-described hair treatment processes, comprises 0.1 to 40 wt. % of the organic acid (A) or salt thereof, 1 to 20 wt. % of a buffering agent and 0.1 to 20 wt. % of the oxidizing agent, and has a pH of from 1 to 5.
• the present invention also provides an aqueous composition, which is the intermediate treatment for use in the above-described hair treatment processes, comprises 0.1 to 40 wt. % of the organic acid (A) or salt thereof and 1 to 20 wt. % of a buffering agent, and has a pH of from 1 to 5.
• the present invention also provides a hair treatment process which comprises applying an after-treatment—which comprises the organic acid (A) or salt thereof, has buffer capacity and has a pH of from 1 to 5—to the hair treated by any one of the above-described processes, allowing the hair to stand for 1 to 120 minutes, rinsing the hair with water, and then drying the hair.
• an after-treatment which comprises the organic acid (A) or salt thereof, has buffer capacity and has a pH of from 1 to 5—to the hair treated by any one of the above-described processes, allowing the hair to stand for 1 to 120 minutes, rinsing the hair with water, and then drying the hair.
• the present invention also provides an aqueous composition, which is the after-treatment for use in the above-described hair treatment processes, comprises 0.1 to 40 wt. % of the organic acid (A) or salt thereof and 1 to 20 wt. % of a buffering agent, and has a pH of from 1 to 5.
• each hair treatment process according to the present invention an extremely high, extremely curly hair correcting effect can be obtained by a procedure as simple as conventional straight perm. Further, subsequent to the practice of the extremely curly hair correcting process, the corrected state can be maintained or, after returned into the extremely curly state, the corrected state of the hair can be restored, both by a routine aftercare at home without damaging the hair. It has, therefore, become possible to avoid a damage to the hair by a treatment such as a further straight perm or additional ironing which has heretofore been required to maintain a straightened state.
• the non-aromatic hydrophobic group having a total carbon number of from 3 to 11 can be a substituted or unsubstituted, aliphatic hydrocarbon group, alicyclic hydrocarbon group, non-aromatic heterocyclic group or the like.
• the aromatic hydrophobic group having a total carbon number of from 4 to 18 can be a substituted or unsubstituted, aromatic hydrocarbon group or heterocyclic aromatic group. Preferred examples of these hydrophobic groups can include groups to be mentioned hereinafter.
• Preferred examples of the aliphatic hydrocarbon group can include linear or branched, saturated or unsaturated aliphatic hydrocarbon groups having total carbon numbers of from 3 to 11, especially total carbon numbers of from 4 to 10, and those obtained by substituting these groups with one or more alkoxy groups, which will be mentioned subsequently herein, such that their total carbon numbers fall within the above-specified range.
• the alicyclic hydrocarbon group can be a hydrocarbon group having a total carbon number of from 3 to 11, especially from a total carbon number of from 5 to 10 and containing a saturated or unsaturated alicyclic structure in at least a part thereof.
• Preferred examples can include cycloalkyl groups, cycloalkenyl groups, cycloalkadienyl groups, cycloalkatrienyl groups and cycloalkynyl groups, and those obtained by substituting these groups with one or more aliphatic hydrocarbon groups and/or alkoxy groups to be mentioned subsequently herein or by substituting the below-mentioned aliphatic hydrocarbon groups with one or more of these groups such that the total carbon numbers of the thus-substituted groups fall within the above-specified range.
• the non-aromatic heterocyclic group can be a group having a total carbon number of from 3 to 11, especially a total carbon number of from 4 to 10 and containing a saturated or unsaturated heterocyclic structure in at least a part thereof.
• Preferred examples can include a pyrrolidyl group, piperidyl group, piperidino group, morpholinyl group and morpholino group, and those obtained by substituting these groups with one or more of the below-mentioned aliphatic hydrocarbon groups and/or alkoxy groups or by substituting the below-mentioned aliphatic hydrocarbon groups with one or more of these groups such that the total carbon numbers of the thus-substituted groups fall within the above-specified range.
• the aromatic hydrocarbon group can be a hydrocarbon group having a total carbon number of from 4 to 18, especially a total carbon number of from 6 to 14 and containing an aromatic ring group in at least a part thereof.
• Preferred examples can include a phenyl group, naphthyl group, anthryl group, biphenylyl group, phenoxyphenyl group, diphenylmethyl group, cumylphenyl group, indenyl group and fluorenyl group, and those obtained by substituting these groups with one or more of the below-mentioned hydrocarbon groups and/or alkoxy groups or by substituting the below-mentioned hydrocarbon groups with one or more of these groups such that the total carbon numbers of the thus-substituted groups fall within the above-specified range.
• Preferred as the heterocyclic aromatic group can be groups each having a total carbon number of from 4 to 18 and containing a heterocyclic group in at least a part thereof, for example, a furyl group, pyrrolyl group, thiophenyl group, quinolyl group and isoquinolyl group, especially groups each having a total carbon number of from 6 to 14 and containing a heterocyclic group in at least a part thereof, for example, a quinolyl group and isoquinolyl group, and those obtained by substituting these groups with one or more of the below-mentioned hydrocarbon groups and/or alkoxy groups or by substituting the below-mentioned hydrocarbon groups with one or more of these groups such that the total carbon numbers of the thus-substituted groups fall within the above-specified range.
• the hydrocarbon groups which may be substituted to the exemplified groups and the hydrocarbon groups to which the exemplified groups may be substituted can be monovalent to trivalent hydrocarbon groups having 1 to 10 carbon atoms, especially linear or branched, saturated or unsaturated aliphatic hydrocarbon groups having 1 to 8 carbon atoms, and saturated or unsaturated alicyclic hydrocarbon groups having 5 to 8 carbon atoms.
• the alkoxy groups which may substitute to the exemplified groups such that the total carbon numbers of the thus-substituted groups fall within the corresponding ranges can be linear or branched alkoxy groups having 1 to 10 carbon atoms, especially 1 to 8 carbon atoms. A plurality of these hydrocarbon groups and/or alkoxy groups may be substituted to the exemplified groups.
• the organic acid (A) or salt thereof may contain one or two, especially one acidic group selected from a sulfo group [—SO 3 H], a sulfate ester group [—OSO 3 H], a sulfino group [—SO 2 H], a sulfeno group [—S—OH], a phosphono group [—P( ⁇ O) (OH) 2 ], a phosphate ester group [—OP( ⁇ O) (OH) 2 , —H n+1 P n O 3n+1 ] or a phosphinico group [ ⁇ P( ⁇ O)OH] (a part or the whole part of which may form a salt).
• Examples of the acidic group can include preferably a sulfo group, a sulfate ester group, a phosphono group and a phosphate group, more preferably a sulfo group and a sulfate ester group, particularly preferably a sulfo group.
• the organic acid (A) or salt thereof may contain 0 to 2 amino and/or hydroxyl groups in total, although from the standpoint of extremely curly hair correcting effect, it is preferred not to contain these hydrophilic substituents.
• Examples of the salt of the organic acid (A) can include the sodium salt, the potassium salt, the ammonium salt, and the like. Preferred specific examples of the organic acid (A) or salt thereof can include the compounds to be shown hereinafter.
• Illustrative of the organic acid (A) or salt thereof, which contains an aliphatic or alicyclic hydrocarbon group and a sulfo group are linear alkanesulfonic groups such as hexanesulfonic acid, heptanesulfonic acid, octanesulfonic acid and nonanesulfonic acid, and salts thereof; linear alkenesulfonic acids such as hexenesulfonic acid, heptenesulfonic acid, octenesulfonic acid and nonenesulfonic acid, and salts thereof; alicyclic, saturated or unsaturated hydrocarbonsulfonic acids having 6 to 8 carbon atoms such as cyclohexanesulfonic acid and cyclohexenesulfonic acid, and salts thereof; branched alkanesulfonic acids having 6 to 10 carbon atoms such as dimethylbutanesulfonic acid, ethylbutanesulfonic acid, methyl
• Illustrative of the organic acid (A) or salt thereof, which contains an aromatic hydrocarbon group and a sulfo group are sulfonic acids containing a benzene skeleton, such as toluenesulfonic acid, butyltoluenesulfonic acid, xylenesulfonic acid, styrenesulfonic acid, methylstyrenesulfonic acid, butylstyrenesulfonic acid, cumenesulfonic acid,.
• methylcumenesulfonic acid cymenesulfonic acid, trimethylbenzenesulfonic acid, ethylbenzenesulfonic acid, phenylethanesulfonic acid, diethylbenzenesulfonic acid, propyl- or isopropylbenzenesulfonic acid, phenylpropanesulfonic acid, diisopropenylbenzenesulfonic acid, divinylbenzenesulfonic acid, butyl-, isobutyl, tert-butyl- or sec-butylbenzenesulfonic acid, methylbutylbenzenesulfonic acid, di-tert-butylbenzenesulfonic acid, and salts thereof; sulfonic acids containing a naphthalene skeleton, such as naphthalenesulfonic acid, naphthanedisulfonic acid, methylnaphthalenesul
• Illustrative of the organic acid (A) or salt thereof, which contains a heterocyclic group and a sulfo group, are quinolinesulfonic acid, isoquinolinesulfonic acid and methylquinolinesulfonic acid, and salts thereof.
• organic acids (A) or salts thereof sulfate esters, phosphonic acid and phosphate esters, which contain the same hydrophobic groups as the above-described sulfonic acids, and their salts can be mentioned. Two or more of these organic acids (A) and salts thereof can be used in combination.
• the first pack and the second pack it is necessary for at least one of the first pack and the second pack to contain the organic acid (A) or salt thereof. It is, however, preferred that these first and second packs both contain the organic acid (A) or salt thereof.
• the first pack and the intermediate treatment it is necessary for at least one of the first pack and the intermediate treatment to contain the organic acid (A) or salt thereof.
• the second pack also contains the organic acid (A) or salt thereof. Further, it is more preferred that the second pack also contains the organic acid (A) or a salt thereof.
• first pack, intermediate treatment and second pack contain the organic acid (A) or salt thereof
• its content in each treatment may range preferably from 0.1 to 40 wt. %, more preferably from 1 to 30 wt. %, notably from 2 to 20 wt. %.
• the expression “to have buffer capacity” as used herein means that a value B determined in accordance with the following formula by using as a scale the concentration of a base required to raise the pH of a 10 wt. % aqueous solution of a composition by 1 from the initial value at 25° C. (hereinafter called “B value”) is 0.001 gram equivalent/L or greater.
• C B indicates the ionic concentration (gram equivalent/L) of the base.
• the aqueous composition to have buffer capacity at pH 1 to 5, it is necessary for the aqueous composition to contain as a buffering agent an organic or inorganic acid the acid dissociation constant pKa at 25° C. of which (at least one pKa when the acid has plural acid dissociation constants) ranges from 1 to 5, and preferably also to contain its salt.
• the acid can include carboxylic acids and phosphoric acids, such as citric acid, lactic acid, malic acid, tartaric acid, glycolic acid, succinic acid, benzoic acid, and pyrrolidonecarboxylic acid.
• Illustrative of their salts are their alkali metal salts such as their sodium salts and potassium salts, their alkaline earth metal salts, and their ammonium salts.
• the possession of buffer capacity by the aqueous composition can enhance the extremely curly hair correcting effect. This can be considered to be attributed to the possibility of holding the pH at a low value by the possession of buffer capacity, since it is advantageous to control the pH at a lower value upon causing the anionized organic acid (A) or salt thereof to be adsorbed and immobilized like ionic bonding at cation sites formed as a result of cutting of ionic bonds in hair under an acidic condition.
• the first pack for use in the present invention contains the hair keratin reducing substance.
• the hair keratin reducing substance can include thioglycolic acid, thiolactic acid, thioglycerol and glyceryl monothioglycolate, their salts such as their ammonium and sodium salts, and their derivatives; and cysteine, cysteine hydrochloride, N-acetylcysteine, sulfites and hydrogensulfites.
• Two or more of these hair keratin reducing substances can be used in combination. Its content may range preferably from 0.1 to 20 wt. %, more preferably from 1 to 10 wt. %, notably from 2 to 8 wt. % in the first pack.
• dithiodiglycolic acid or dithiodilactic acid which is the dithio compound of the corresponding hair keratin reducing thiol compound described above, a salt thereof or the like.
• the pH of the first pack may be adjusted preferably to 5 to 11, more preferably 6 to 10, notably 7 to 9.6.
• the intermediate treatment for use in the present invention has buffer capacity, specifically a B value of 0.001 gram equivalent/L or greater, preferably 0.01 gram equivalent/L or greater, notably 0.01 to 0.2 gram equivalent/L.
• the intermediate treatment can preferably contain a buffering agent in a proportion of from 1 to 20 wt. %. Its pH ranges from 1 to 5, preferably from 1 to 4, more preferably from 1 to 3.5, notably from 2.5 to 3.5.
• the intermediate treatment may contain a pH indicator, for example, methyl yellow, methyl orange, methyl red or bromophenol blue.
• the intermediate treatment it may be contemplated, for example, to mix a suitable amount of a solid acid (citric acid or the like) with the first pack during application of the first pack to the hair such that the pH is lowered to 1 to 5; or to coat a solid acid with a sustained-dissolution coating agent and to mix a suitable amount of the thus-coated solid acid with the first pack shortly before or during application of the first pack to the hair such that the pH is lowered to pH 1 to 5 at a stage that a certain time has elapsed.
• a suitable amount of a solid acid citric acid or the like
• a sustained-dissolution coating agent can include water-soluble high molecular compounds such as polyethylene glycol, gypsum films, hydrophobic substances such as calcium fluoride, solid fat preparations, and surfactants.
• the second pack for use in the present invention contain the oxidizing agent.
• the oxidizing agent can include sodium bromate, sodium perborate and hydrogen peroxide, with hydrogen peroxide being particularly preferred. Two or more of these oxidizing agents can be used in combination. Its content may preferably range from 0.1 to 20 wt. % in the second pack.
• the second pack in the process which comprises the steps (1-1) to (1-4), has buffer capacity, specifically a B value of 0.001 gram equivalent/L or greater, preferably 0.01 gram equivalent/L or greater, notably 0.01 to 0.2 gram equivalent/L or greater.
• This second pack may preferably contain a buffering agent in a proportion of from 1 to 20 wt. %. Its pH may range from 1 to 5, preferably from 1 to 4, more preferably from 1 to 3.5, notably from 2.5 to 3.5.
• the intermediate treatment has buffer capacity and its pH ranges from 1 to 5. It is, therefore, not essential for the second pack to be one having buffer capacity and pH 1 to 5, although it is preferred to have buffer capacity and pH 1 to 5.
• this second pack has buffer capacity, it is preferred to contain a buffering agent in a proportion of from 1 to 20 wt. %.
• first pack, intermediate treatment and second pack may preferably contain an organic solvent to facilitate penetration of the organic acid (A) or salt thereof into the hair.
• organic solvent can include those represented by any one of the following formulas (i), (ii), (iii), (iv) and (v).
• R 1 represents a hydrogen atom, a linear or branched alkyl group having 1 to 4 carbon atoms or a linear or branched alkoxy group having 1 to 4 carbon atoms
• W represents a single bond, a methylene group or a linear or branched alkylene group having 2 to 4 carbon atoms
• Y 1 represents a linear or branched alkylene group having 2 to 4 carbon atoms
• n denotes an integer of from 0 to 3.
• R 2 represents a linear, branched or cyclic alkyl group having 4 to 7 carbon atoms
• Y 2 represents a linear or branched alkylene group having 2 to 4 carbon atoms
• m denotes an integer of from 0 to 3.
• R 3 represents a linear or branched alkyl group having 1 to 4 carbon atoms.
• R 4 represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms.
• R 5 represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms
• k denotes an integer of 1 or 2.
• examples of the linear or branched alkyl groups having 1 to 4 carbon atoms and represented by R 1 , R 3 , R 4 and R 5 can include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group and tert-butyl group.
• Examples of the linear or branched alkoxy group having 1 to 4 carbon atoms and represented by R 1 can include methoxy group, ethoxy group, propoxy group, isopropoxy group and butoxy group.
• Examples of the linear, branched or cyclic alkyl group having 4 to 7 carbon atoms and represented by R 2 can include butyl group, pentyl group, hexyl group, heptyl group, isobutyl group, cyclopentyl group and cyclohexyl group.
• examples of the linear or branched alkylene groups having 2-4 carbon atoms and represented by X, Y 1 and Y 2 can include can include ethylene group, trimethylene group, propylene group and tetramethylene group.
• Illustrative organic solvents (i) are 2-phenoxyethanol, benzyl alcohol, 2-phenylethanol and 2-benzyloxyethanol; illustrative organic solvents (ii) are n-butanol, ethylene glycol mono(n-butyl) ether and diethylene glycol mono(n-butyl) ether; illustrative organic solvents (iii) are N-methylpyrrolidone and N-ethylpyrrolidone; illustrative organic solvents (iv) are ethylene carbonate and propylene carbonate; and illustrative organic solvents (v) are ⁇ -butyrolactone, ⁇ -valerolactone and ⁇ -caprolactone. Among these, the organic solvents (i), especially benzyl alcohol and 2-benzyloxyethanol are preferred.
• a lower alkanol such as ethanol or isopropanol
• a polyol such as propylene glycol, hexylene glycol or glycerin, or a mono-lower alkyl ether of ethylene glycol or diethylene glycol.
• Two or more organic solvents may be used in combination. Its content may range preferably from 1 to 50 wt. %, more preferably from 3 to 45 wt. %, notably from 5 to 40 wt. % in each pack and treatment.
• the amount of the first pack to be applied may range preferably from 0.1 to 4 times by weight, notably from 0.5 to 2.5 times by weight as much as the hair to be treated.
• the time of treatment with the first pack may be suitably adjusted within a range of from 1 to 120 minutes.
• the hair may be heated if necessary. It is preferred to control the temperature at 30 to 55° C., especially at 35 to 50° C. around the hair.
• step (1-2) it is preferred to skip the step (1-2) when the first pack employed in the step (1-1) contains the organic acid (A) or salt thereof, but to conduct the step (1-2) when the first pack employed in the step (1-1) does not contain the organic acid (A) or salt thereof.
• the amount of the second pack to be applied may range preferably from 0.1 to 3 times by weight, notably from 0.5 to 2.5 times by weight as much as the hair to be treated when the step (1-2) is conducted.
• the amount of the second pack to be applied may range preferably from 0.5 to 20 times by weight as much as the amount of the first pack applied.
• the time of treatment with the second pack may be suitably adjusted within a range of from 1 to 60 minutes.
• step (1-4) the aqueous treatment on the hair is first rinsed off, and after shampooing and rinsing as needed, the hair is dried.
• the shaping is conducted in any one or more of the above-described steps.
• This shaping itself can be conducted in a similar manner as in conventional permanent treatments (straight perm, wavy perm, ironing perm).
• straightening a sufficient extremely curly hair correcting effect can be obtained even by a simple procedure that the hair is smoothed into straight configuration by a brush or the like while the first pack and second pack are still remaining on the hair.
• a heating device iron
• a high extremely curly hair correcting effect can also be obtained by ironing the hair after the aqueous treatment is rinsed off in the step (1-4).
• the temperature of the iron may be set preferably at 70 to 180° C., notably at 140 to 180° C.
• a treatment with a hair protecting ingredient or the like contained therein can be used as needed.
• the use of the iron makes it possible to obtain a still higher extremely curly hair correcting effect.
• the amount of the first pack to be applied may range preferably from 0.1 to 4 times by weight, notably from 0.5 to 2.5 times by weight as much as the hair to be treated.
• the time of treatment with the first pack may be suitably adjusted within a range of from 1 to 120 minutes.
• the hair may be heated if necessary. It is preferred to control the temperature at 30 to 55° C., especially at 35 to 50° C. around the hair.
• the intermediate treatment is applied to the hair which has been treated with the first pack.
• the first pack contains the organic acid (A) or salt thereof
• the amount of the intermediate treatment to be applied is suitably adjusted depending upon the pH of the first pack, the pH and buffer capacity of the intermediate treatment, and the like.
• the intermediate treatment may be applied in an amount such that subsequent to its mixing with the first pack as an aqueous alkaline solution, the pH may fall within a range of from 1 to 5, preferably from 2 to 4, more preferably from 2.5 to 3.8.
• the amount of the intermediate treatment to be applied may be preferably 1 to 50 times by weight, notably 2 to 10 times by weight as much as the amount of the first pack applied.
• the time of treatment with the intermediate treatment may be suitably adjusted within a range of from 0.1 to 60 minutes.
• the hair may be heated if necessary. It is preferred to control the temperature at 30 to 55° C., especially at 35 to 50° C. around the hair.
• the first pack does not contain the organic acid (A) or salt thereof, on the other hand, it is preferred to rinse off the first pack before applying the intermediate treatment to the hair.
• the amount of the intermediate treatment to be applied may be preferably 0.1 to 3 times by weight, notably 0.5 to 2.5 times by weight as much as the amount of the hair to be treated.
• the time of treatment with the intermediate treatment may be suitably adjusted within a range of from 1 to 60 minutes.
• the hair may be heated if necessary. It is preferred to control the temperature at 30 to 55° C., especially at 35 to 50° C. around the hair.
• the correcting effect can be enhanced still further by conducting additional treatment with the intermediate treatment, which contains the organic acid (A) or salt thereof, after the hair is rinsed with water subsequent to its successive treatment with the first pack, which contains the organic acid (A) or salt thereof, and the intermediate treatment.
• the amount of the second pack to be applied may range preferably from 0.1 to 3 times by weight, notably from 0.5 to 2.5 times by weight as much as the hair to be treated.
• the time of treatment with the second pack may be suitably adjusted within a range of from 1 to 60 minutes.
• step (2-5) the aqueous treatment on the hair is first rinsed off, and after shampooing and rinsing as needed, the hair is dried.
• the shaping is conducted in any one, two or more of the above-described steps.
• This shaping itself can be conducted in a similar manner as in conventional permanent treatments (straight perm, wavy perm, ironing perm).
• straightening a sufficient extremely curly hair correcting effect can be obtained even by a simple procedure that the hair is smoothed into straight configuration by a brush or the like while the first pack, the second pack or the intermediate treatment still remains on the hair.
• an iron is used, a high extremely curly hair correcting effect can also be obtained by ironing the hair after the aqueous treatment is rinsed off in the step (2-3) or (2-5).
• the temperature of the iron may be set preferably at 70 to 180° C., notably at 140 to 180° C.
• a treatment with a hair protecting ingredient or the like contained therein can be used as needed.
• the use of the iron makes it possible to obtain a still higher extremely curly hair correcting effect.
• the hair treated by the above-described process is also excellent in the persistency of the extremely curly hair correcting effect.
• general hair care shampooing, rinsing and the like
• a clear difference is observed in persistency between the hair treated by the above-described process and the hairs treated by conventional straight perm.
• the after-treatment employed here has buffer capacity, and its B value is 0.001 gram equivalent/L or greater, preferably 0.01 gram equivalent/L or greater, notably 0.01 to 0.2 gram equivalent/L.
• the after-treatment may contain a buffering agent in a proportion of from 1 to 20 wt. %. Its pH may range from 1 to 5, preferably from 1 to 4, more preferably from 1 to 3.5, notably from 2.5 to 3.5.
• the content of the organic acid (A) or salt thereof in the after-treatment may range preferably from 0.1 to 40 wt. %, more preferably from 1 to 30 wt. %, notably from 2 to 20 wt. %.
• the after-treatment may preferably contain an organic solvent.
• Preferred examples of the organic solvent can be those represented by any one of the formulas (i), (ii), (iii), (iv) and (iv) described above. Two or more organic solvents may be used in combination. Its content may range preferably from 1 to 50 wt. %, more preferably from 3 to 45 wt. %, notably from 5 to 40 wt. % in the whole composition.
• the after-treatment is no longer required to contain the hair keratin reducing substance or the oxidizing agent, the above-described treatment does not cause a hair damage which would otherwise occur by such a substance or agent.
• the after-treatment can be used very conveniently as it can be formulated into a shampoo, a rinse, a pre-shampooing treatment or the like.
• the after-treatment can be applied no matter whether the hair is dry or wet.
• the amount of the after-treatment to be applied may range preferably from 0.1 to 3 times by weight, notably from 0.5 to 2.5 times by weight as much as the hair to be treated, although it should be suitably adjusted depending on its preparation form and the like.
• the time of treatment with the after-treatment may be suitably adjusted within a range of from 1 to 120 minutes.
• the hair may be heated if necessary. It is preferred to control the temperature at 30 to 55° C., especially at 35 to 50° C. around the hair.
• the first pack, second pack, intermediate treatment and after-treatment in the present invention may each contain water as a medium and be in the form of a liquid or in the form of a gel with a viscosity increasing agent contained therein.
• the above-mentioned ingredients they can contain a variety of perfume and/or cosmetic ingredients as needed.
• Illustrative of such perfume and/or cosmetic ingredients are pH adjusters (ammonia, monoethanolamine, 2-propanolamine, sodium hydroxide, citric acid, sodium citrate, lactic acid, sodium lactate, phosphoric acid, etc.), viscosity increasing agents (hydroxyethylcellulose, xanthan gum, polyacrylic acid derivatives, etc.), anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, semi-polar surfactants, cosmetic oils, silicones, anionic polymers, cationic polymers, amphoteric polymers, fragrances, colorants, preservatives, ultraviolet absorbers, hair protecting ingredients, touch feel improvers, humectants, chelating agents, hair growth promotion ingredients, and so on.
• pH adjusters ammonia, monoethanolamine, 2-propanolamine, sodium hydroxide, citric acid, sodium citrate, lactic acid, sodium lactate, phosphoric acid, etc.
• viscosity increasing agents hydroxy
• First Pack X sodium 2-naphthalenesulfonate (2-NSA added)
• Monoethanolamine thioglycolate 50 wt. %)
• Monoethanolamine q.s. to pH 9.0
• Sodium 2-naphthalenesulfonate 6.0
• 2-Benzyloxyethanol 7.5
• Ethanol 10.0
• Disodium edetate 0.5 Hydroxypropyl xanthan gum
• First Pack Y [2-NSA free] 2-NSA was not added in the composition of the first pack X, and the composition was balanced with purified water.
• Each first pack was applied to the hair in an amount 1.5 times as much as the weight of the hair.
• the hair was smoothed into straight configuration and was left over for 30 minutes. Upon elapsed time of 15 minutes after the application, however, the hair was again smoothed into straight configuration with fingers or a comb.
• Example 1-D and 1-E the first pack was rinsed off with water, the hair was towel-blotted to remove water, the corresponding intermediate treatment was applied to the hair in an amount 1.5 times as much as the weight of the hair, the hair was smoothed into straight configuration and was left over for 30 minutes, and the hair was rinsed with water and towel-blotted to remove water.
• Example 1-A and Examples 1-D to 1-I the corresponding second pack was applied to the hair in an amount equal in weight to the hair, the hair was smoothed into straight configuration and left over for 15 minutes, and the hair was rinsed with water and then dried.
• Example 1-B and 1-C the corresponding second pack was applied to the hair in an amount 1.5 times as much as the weight of the hair, the hair was smoothed into straight configuration and left over for 15 minutes, and the hair was rinsed with water and then dried.
• Second Pack Z (Aqueous Sodium Bromate Solution]
• a 6.0 wt. % aqueous solution of sodium bromate was prepared. This corresponds to the formulation of the second pack in Example 3 of JP-A-07101840.
• the first pack Y was applied to the hair in an amount 1.5 times as much as the weight of the hair.
• the hair was smoothed into straight configuration and was left over for 30 minutes. Upon elapsed time of 15 minutes after the application, however, the hair was again smoothed into straight configuration with fingers or a comb.
• the corresponding intermediate treatment was applied to the hair in an amount 1.5 times as much as the weight of the hair.
• the hair was smoothed into straight configuration and was left over at 50° C. for 15 minutes, and the hair was rinsed with water and towel-blotted to remove water.
• Example 2 Compared with the treatment by the process described in Example 3 of JP-A-07101840 (Comparative Example 2), the treatment by the process of the present invention, which makes use of an intermediate treatment having buffer capacity, (Example 2) clearly exhibited a high correcting effect.
• Each first pack was applied to the hair in an amount 2 times as much as the weight of the hair. The hair was smoothed into straight configuration and was left over for 45 minutes.
• the intermediate treatment was applied to the hair in an amount 7 times as much as the used amount of the corresponding first pack without rinsing off the first pack with water. After having the intermediate treatment absorbed in the hair, the intermediate treatment was promptly rinsed off with water and the hair was towel-blotted to remove water.
• Each second pack was applied to the hair in an amount 1.5 times as much as the weight of the hair, the hair was smoothed into straight configuration and left over for 20 minutes, and the hair was rinsed with water and then dried.
• Example 1 Using the first packs X and Y, the intermediate treatment Y and the second packs X and Y prepared in Example 1, treatments were applied to the extremely natural extremely curly hair of a Latin American subject and that of a black subject in a similar manner as in Example 1-G and Comparative Example 1, separately. From the external appearances of the hair samples after drying, their natural curliness correcting effects were ranked in accordance with the same standard as in Example 1.
• Each first pack was applied in an amount 2 times as much as the weight of the Latin American subject's hair and in an amount 3 times as much as the weight of the black subject's hair.
• the hair samples were smoothed into straight configuration and were left over for 30 minutes. In each of these cases, however, upon an elapsed time of 15 minutes after the application, the hair sample was smoothed into straight configuration with fingers or a comb.
• the intermediate treatment was applied to the hair in an amount 5 times as much as the used amount of the corresponding first pack without rinsing off the first pack with water. After having the intermediate treatment absorbed in the hair, the intermediate treatment was promptly rinsed off with water and the hair was towel-blotted to remove water.
• the first pack was rinsed off with water, the hair was towel-blotted to remove water, and no intermediate treatment was conducted.
• Each second pack was applied to the hair in a weight equal to the hair, the hair was smoothed into straight configuration and left over for 15 minutes, and the hair was rinsed with water and then dried.
• the first pack was applied to the hair in an amount 1.5 times as much as the weight of the hair.
• the hair was smoothed into straight configuration and was left over for 30 minutes. Upon an elapsed time of 15 minutes after the application, however, the hair was smoothed into straight configuration with fingers or a comb.
• the intermediate treatment was applied to the hair in an amount 5 times as much as the used amount of the first pack without rinsing off the first pack with water. After having the intermediate treatment absorbed in the hair, the intermediate treatment was promptly rinsed off with water and the hair was towel-blotted to remove water. In each of Examples 5-A and 5-B, the hair was dried with a drier and then, high-temperature ironing (170° C.) was conducted by a method known per se in the art.
• the second pack was applied to the hair in a weight equal to the hair, the hair was smoothed into straight configuration and left over for 15 minutes, and the hair was rinsed with water and then dried.
• high-temperature ironing (170° C.) was conducted by a method known per se in the art.
• OSA was not added in the composition of the second pack X′, and the composition was balanced with purified water.
• Tresses were each prepared with 10 fibers of the natural extremely curly hair of a Japanese subject. Those tresses were wound on glass rods of 10 mm in diameter, and then subjected to the treatments presented in Table 8, respectively. From their external appearances, the conditions of the thus-applied permanent waves were ranked. TABLE 8 First Water Intermediate Water Second Treatment pack rinse treatment rinse pack Comp. Ex. 5 Y′ — — Water Y′ rinse Ex. 6 X′ — Y′ Water X′ rinse
• Example 6 In each of Example 6 and Comparative Example 5, the corresponding first pack was applied in a weight equal to the tress, and the tress was left over at 40° C. for 30 minutes.
• Example 6 the intermediate treatment was applied to the hair in an amount 2 times as much as the used amount of the corresponding first pack without rinsing off the first pack with water. After the hair was left over for 1 minute, the hair was rinsed with water and towel-blotted to remove water.
• Example 6 In each of Example 6 and Comparative Example 5, the corresponding second pack was applied to the hair in a weight equal to the hair. After the hair was left over at 40° C. for 20 minutes, the hair was rinsed with water, unwound from the rod, and then allowed to dry naturally.
• Example 5 the tress was in a disheveled form accompanied with natural curliness and curls imparted by the permanent wave treatment.
• Example 6 new curls were imparted subsequent to correction of the natural curliness. The tress was, therefore, in an attractively styled, wavy form.

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• 2001
  • 2001-06-04 JP JP2001168078A patent/JP3703738B2/ja not_active Expired - Fee Related
• 2002
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  • 2002-06-03 EP EP02730869.1A patent/EP1393708B1/en not_active Expired - Lifetime
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  • 2002-06-03 US US10/333,914 patent/US20040011373A1/en not_active Abandoned
  • 2002-06-03 WO PCT/JP2002/005419 patent/WO2002098381A1/ja active Application Filing
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