US20090276964A1

US20090276964A1 - Dye Remover Composition

Info

Publication number: US20090276964A1
Application number: US12/097,964
Authority: US
Inventors: Takuji Asada
Original assignee: Hoyu Co Ltd
Current assignee: Hoyu Co Ltd
Priority date: 2005-12-21
Filing date: 2006-12-21
Publication date: 2009-11-12
Also published as: WO2007072892A1; JP4827856B2; JPWO2007072892A1; KR20080072750A

Abstract

The present invention provides a dye remover composition performing destaining by the reduction action of a reducing agent, wherein the composition reduces the irritation to a scalp when applied to the scalp and is capable of preventing air oxidation after the destaining treatment. The dye remover composition is used for destaining fiber stained with an oxidation dye including a dye intermediate having an amino group, includes a reducing agent, and performs the destaining of fiber by the reduction action of the reducing agent. The dye remover composition further includes a reducing sugar. Examples of reducing sugar include xylose and dihydroxyacetone.

Description

TECHNICAL FIELD

The present invention relates to a dye remover composition capable of suppressing the discoloration of fiber after a destaining treatment.

BACKGROUND ART

A hair dye composition comprising a dye carrier material including, for example, an oxidation dye and ammonia, and an oxidation agent such as hydrogen peroxide is, known as a typical hair dye composition which stains fiber such as hair. There is a known dye remover composition being used for destaining fiber stained with the hair dye composition, wherein the dye remover composition includes a reducing agent. The dye remover composition performs the destaining of fiber by the reduction action of the reducing agent. With fiber destained with the dye remover composition, there has been a problem that the rediscoloration of fiber, for example, the blackening of fiber occurs due to air oxidation a few hours or a few days after destaining. Patent Document 1 discloses a dye remover composition including α-oxocarboxylic acid. The dye remover composition prevents the discoloration of fiber due to air oxidation after the destaining treatment due to the action of α-oxocarboxylic acid.

<Patent Document 1: Japanese Laid-Open Patent Publication No. 11-310521

DISCLOSURE OF THE INVENTION

However, α-oxocarboxylic acid in the dye remover composition described in Patent Document 1, which is included in order to prevent the discoloration due to air oxidation, is a strong acid. Therefore, the pH of the dye remover composition is maintained low. As a result, there has been a problem that the scalp is irritated at the time of use of the dye remover composition when the dye remover composition is applied to head hair. If the content of α-oxocarboxylic acid is simply set lower in order to reduce the irritation, it is impossible to sufficiently suppress the discoloration of fiber due to air oxidation.
As a result of diligent research, the present inventors achieved the present invention by finding that the above described problems can be solved by including a reducing sugar in a dye remover composition when a dye intermediate having an amino group is included in an oxidation dye. It is an objective of the present invention to provide a dye remover composition performing destaining by the reduction action of a reducing agent, wherein the dye remover composition reduces the irritation to a scalp when applied to the scalp and is capable of preventing air oxidation after the destaining treatment.
According to one aspect of the present invention, there is provided a dye remover composition which is used in the destaining of fiber stained with an oxidation dye including a dye intermediate having an amino group, includes a reducing agent, and performs the destaining of fiber by the reduction action of the reducing agent. The dye remover composition further includes a reducing sugar.
The reducing sugar is preferably a monosaccharide. The monosaccharide is preferably at least one selected from the group consisting of xylose and dihydroxyacetone. The reducing agent is preferably at least one selected from the group consisting of an ascorbic acid, a thioglycolic acid, a cysteine, a mercapto compound, a sulfite, a bisulfite, and a thiosulfate.
The dye remover composition preferably further includes a hair penetrant. The hair penetrant is preferably an aromatic alcohol. Preferably, the reducing sugar is xylose, and the mass ratio of xylose to the hair penetrant is in the range of 0.1 to 5. Preferably, the content of xylose in the dye remover composition is in the range of 0.5 to 30% by mass. Moreover, preferably, the reducing sugar is dihydroxyacetone, and the mass ratio of dihydroxyacetone to the hair penetrant is in the range of 0.05 to 5. Preferably, the content of dihydroxyacetone in the dye remover composition is in the range of 0.05 to 30% by mass.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described in detail with reference to one embodiment specific for a dye remover composition hereinafter. The dye remover composition in the present embodiment is used for the destaining of hair as fiber stained with a hair dye composition. The hair dye composition consists of a first agent and a second agent.

The first agent of a hair dye composition includes, for example, an oxidation dye and an alkaline agent. The oxidation dye is a compound capable of color developing induced by oxidation polymerization by an oxidation agent included in the second agent of the hair dye composition, and is categorized as a dye intermediate and a coupler. The oxidation dye at least includes a dye intermediate, wherein the dye intermediate has an amino group.
Examples of dye intermediate having an amino group include p-phenylenediamine, toluene-2,5-diamine, N-phenyl-p-phenylenediamine, 4,4′-diaminodiphenylamine, p-aminophenol, o-aminophenol, p-methylaminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, 2-hydroxyethyl-p-phenylenediamine, o-chloro-p-phenylenediamine, 4-amino-m-cresol, 2-amino-4-hydroxyethyl aminoanisole, 2,4-diaminophenol, and the salts thereof. These may be included singularly, or two or more may be included in combination.
A coupler develops color by binding to a dye intermediate. Examples of coupler include 5-amino-o-cresol, m-aminophenol, 5-(2-hydroxyethylamino)-2-methylphenol, m-phenylenediamine, 2,4-diaminophenoxyethanol, toluene-3,4-diamine, 2,6-diaminopyridine, diphenylamine, N,N-diethyl-m-aminophenol, phenylmethyl pyrazolone, and the salts thereof. These may be included singularly, or two or more may be included in combination. The oxidation dye preferably consists of at least one selected from the specific examples of dye intermediate and at least one selected from the specific examples of coupler. In this case, a color tone of hair can be changed in various ways.
The content of oxidation dye in the hair dye composition is preferably in the range of 0.02 to 25% by mass, and more preferably 0.2 to 15% by mass. If the content of oxidation dye is less than 0.02% by mass, it may be difficult to obtain a sufficient stainability. Even though the content of oxidation dye exceeds 25% by mass, stainability does not make further improvement. As a result, the economic efficiency of hair coloring may decrease.
The content of dye intermediate in the hair dye composition is preferably in the range of 0.01 to 15% by mass, and more preferably 0.1 to 10% by mass. If the content of dye intermediate is less than 0.01% by mass, it may be difficult to obtain a sufficient stainability. Even though the content of dye intermediate exceeds 15% by mass, stainability does not make further improvement. As a result, the economic efficiency of hair coloring may decrease.
The content of coupler in the hair dye composition is preferably in the range of 0.01 to 10% by mass, and more preferably 0.1 to 5% by mass. If the content of coupler is less than 0.01% by mass, it may be difficult to obtain a sufficient stainability. Even though the content of coupler exceeds 10% by mass, stainability does not make further improvement. As a result, economic efficiency of hair coloring may decrease. The first agent may arbitrarily include, for example, at least one selected from the oxidation dyes and direct dyes described in “The Japanese Standards of Quasi-Drug Ingredients” (June 1991, Yakujinippo, Ltd.) as dyes other than the oxidation dye.
An alkaline agent improves stainability by promoting the action of the oxidation agent included in the second agent of the hair dye composition, and by improving the permeability of the dye to hair by swelling hair. Examples of alkaline agent include ammonia, an alkanolamine, an organic amine, an inorganic alkali, a basic amino acid, and the salts thereof. Examples of organic amine include 2-amino-2-methyl-1,3-propanediol, and guanidine. Examples of inorganic alkali include sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate. Examples of basic amino acid include arginine and lysine. Example of salt includes an ammonium salt. These may be included singularly, or two or more may be included in combination.
The content of alkaline agent is preferably an amount at which the pH of the first agent is in the range of 8 to 12. If the pH of the first agent is less than 8, there are cases where the action of hydrogen peroxide, which is included in the second agent as an oxidation agent, is not sufficiently promoted when the first agent is mixed with the second agent. If the pH of the first agent exceeds 12, it is likely to cause problems such as damage to hair when the hair dye composition is applied to hair.
The first agent may arbitrarily include the components included in the second agent of the dye remover composition other than the reducing sugar, such as oily ingredients or surfactants. Moreover, the first agent preferably includes a polymerization inhibitor in order to produce polymers having a low polymerization ratio, which are easily destained with the dye remover composition, when the oxidation dye undergoes oxidation polymerization by the oxidation agent. Examples of such polymerization inhibitor include an ascorbic acid and a sulfite, which act as reducing agents. Specific examples of ascorbic acid included in the first agent are the same as the specific examples of ascorbic acid included in the first agent of the dye remover composition. The form of the first agent is not specifically limited, and examples may include liquid, gel, foam, and cream forms. Examples of liquid form include aqueous solutions, dispersions, and emulsions.

The second agent of a hair dye composition includes an oxidation agent. The oxidation agent decolorizes melanin included in hair, and develops color by oxidizing an oxidation dye included in the first agent of the hair dye composition. Examples of oxidation agent include potassium bromate, sodium bromate, sodium perborate, and hydrogen peroxide. The content of oxidation agent in the second agent is preferably 0.1 to 15.0% by mass when the total amount of the second agent is set to 100% by mass.
The second agent includes components generally included in the second agent of an oxidation hair dye composition as components other than the oxidation agent. The second agent may arbitrarily include the components included in the first agent of the hair dye composition other than the oxidation dye and alkaline agent. When the second agent includes hydrogen peroxide as an oxidation agent, the second agent preferably includes a stabilizer in order to suppress the degradation of hydrogen peroxide. Examples of stabilizer include urea, phenacetin, sodium stannate, ethylene glycol phenyl ether, 8-oxyquinoline, and phosphoric acid. The form of the second agent is not specifically limited, and examples may include liquid, gel, foam, and cream forms. Examples of liquid form include aqueous solutions, dispersions, and emulsions.

A hair dye composition is prepared by mixing the first agent and the second agent in a predetermined proportion. The form of the hair dye composition is not specifically limited, and examples may include liquid, cream, gel, and foam forms.
Next, the dye remover composition will be described. The dye remover composition consists of the first agent and second agent.

The first agent of a dye remover composition includes a reducing agent, and, for example, may further include at least one selected from the group consisting of fumaric acid and a dispersing agent. The first agent is provided in a powder form. The reducing agent reduces polymers produced by oxidation polymerization of an oxidation dye staining hair. More specifically, the reducing agent can easily depolymerize or off-resonate polymers having a low polymerization ratio by its reduction action. Examples of reducing agent include an ascorbic acid, a thioglycolic acid, a cysteine, a mercapto compound, a sulfite, a bisulfite, and a thiosulfate.
Examples of ascorbic acid include ascorbic acid, erythorbic acid, and the salts and derivatives thereof. Examples of ascorbate and erythorbate include sodium ascorbate, potassium ascorbate, calcium ascorbate, ammonium ascorbate, monoethanolamine ascorbate, diethanolamine ascorbate, and sodium erythorbate.
Examples of ascorbic acid derivative and erythorbic acid derivative include disodium ascorbyl sulfate, disodium erythorbyl sulfate, magnesium ascorbyl phosphate, ascorbyl palmitate, ascorbyl stearate, ascorbyl dipalmitate, ascorbyl tetra 2-hexyldecanate, ascorbyl myristate, ascorbyl laurate, ascorbyl acetate, ascorbyl propionate, ascorbyl tartrate, ascorbyl citrate, ascorbyl succinate, ascorbyl benzoate, potassium (ascorbyl/tocopheryl) phosphate, ethyl ascorbic acid, allantoin ascorbate, chitosan ascorbate, methylsilanol ascorbate, ascorbyl tetradecylhexyl, aminopropyl ascorbyl phosphate, ascorbic acid polypeptide, ascorbyl glucoside, and ascorbyl methylsilanol pectinate.
Examples of thioglycolic acid include thioglycolic acid, a thioglycolate, and a thioglycolic acid ester. Examples of thioglycolate include ammonium thioglycolate and sodium thioglycolate. Example of thioglycolic acid ester includes glycerin thioglycolate. Examples of cysteine include cysteine, cysteine hydrochloride, and N-acetyl-L-cysteine.
Examples of mercapto compound include thioglycerol, thiolactic acid, thiomalic acid, and cysteamine. Examples of sulfite include sulfurous acid, ammonium sulfite, and sodium sulfite. Examples of bisulfite include ammonium hydrogen sulfite and sodium hydrogen sulfite. Examples of thiosulfate include thiosulfuric acid and sodium thiosulfate. These specific examples of reducing agent may be included singularly, or two or more may be included in combination.
Among the specific examples of reducing agent, an ascorbic acid is preferred. An ascorbic acid is excellent in depolymerizing or off-resonating polymers having a low polymerization ratio. Furthermore, by including an ascorbic acid as a reducing agent, the odor given off from the first agent and dye remover composition can be reduced, and the degree of damage to hair after the destaining treatment can also be reduced.
Fumaric acid suppresses reoxidation of compounds produced by depolymerization or off-resonance of polymers having a low polymerization ratio, and suppresses recoloration of hair. The dispersing agent suppresses the formation of an agglutination state formed by, for example, agglutinating an ascorbic acid, and improves the dispersibility of the first agent in the second agent when mixing the first agent and second agent of the dye remover composition. Examples of dispersing agent include a metal salt of stearic acid, talc, crystalline cellulose, low substituted hydroxypropylcellulose, and dextrin. Examples of metal salt of stearic acid include calcium stearate and magnesium stearate.

The second agent of a dye remover composition includes a reducing sugar, and is provided in a liquid, gel, or cream form. The reducing sugar prevents the discoloration of hair due to air oxidation after the destaining treatment. The reducing sugar has an aldehyde group or ketone group, wherein the group is free or bound by hemiacetal bond, and has Maillard reactivity with amino groups of, for example, amino acids or proteins. Examples of reducing sugar include a free monosaccharide, a reducing disaccharide, and a reducing oligosaccharide.
Examples of free monosaccharide include a triose, a tetrose, a pentose, a hexose, and a heptose. Examples of triose include glyceraldehyde and dihydroxyacetone. Example of tetrose includes erythrose. Examples of pentose include ribose, xylose, and arabinose. Examples of hexose include glucose, galactose, mannose, and fructose. Example of heptose includes sedoheptulose.
Examples of reducing disaccharide include a homobiose and a heterobiose. Examples of homobiose include maltose, cellobiose, isomaltose, and gentiobiose. Examples of heterobiose include melibiose, lactose, maltulose, and lactulose.
Example of reducing oligosaccharide includes maltotriose, which is a degradation product of starch or glycogen by α-amylase. These specific examples of reducing sugar may be included singularly, or two or more may be included in combination. Among these specific examples, a free monosaccharide is preferred because it has a high discoloration preventive effect and high reducing power per unit mass. More preferred are xylose and dihydroxyacetone because they have an even higher discoloration preventive effect and are readily available.
The content of reducing sugar in the dye remover composition is determined by measuring the reducing power of the constituent sugar residue, more specifically, the reducing terminal group in the reducing sugar molecule (a carbonyl group or functional group which is easily converted to a carbonyl group). The content of reducing sugar in the dye remover composition is also determined by measuring the reducing power of the reducing sugar per unit mass. When the reducing sugar is a pentose such as xylose, the content of reducing sugar is preferably in the range of 0.5 to 30% by mass, more preferably 1 to 20% by mass, and most preferably 2 to 10% by mass. If the content of reducing sugar is less than 0.5% by mass, it may be difficult to sufficiently suppress the discoloration of hair after the destaining treatment. If the content of reducing sugar exceeds 30% by mass, hair feel may deteriorate by making hair sticky, for example.
Moreover, when the reducing sugar is a triose such as dihydroxyacetone, the content of reducing sugar is preferably in the range of 0.05 to 30% by mass, more preferably 0.1 to 20% by mass, and most preferably 0.2 to 10% by mass. If the content of reducing sugar is less than 0.05% by mass, it may be difficult to sufficiently suppress the discoloration of hair after the destaining treatment. If the content of reducing sugar exceeds 30% by mass, hair feel may deteriorate by making hair sticky, for example.
The second agent preferably includes a hair penetrant in order to improve the permeability of the active ingredients of the dye remover composition such as the reducing sugar to hair. Examples of hair penetrant include a lower alcohol, a glycol, a glycerin, an aromatic alcohol, ethyl carbitol, phenethyl alcohol, N-methylpyrrolidone, N-ethylpyrrolidone, ethyl carbonate, and propylene carbonate. Examples of lower alcohol include ethanol and isopropanol. Examples of glycol include propylene glycol, 1,3-butylene glycol, isopropylene glycol, hexylene glycol, polyethylene glycol, and polypropylene glycol. Example of glycerin includes diglycerin apart from glycerin itself. Examples of aromatic alcohol include benzyl alcohol and benzyloxy ethanol. These may be included singularly, or two or more may be included in combination. Among these, an aromatic alcohol is preferred because it has a high permeability of the active ingredients of the dye remover composition. More preferred are benzyl alcohol and benzyloxy ethanol because they are readily available.
The content of hair penetrant in the dye remover composition is preferably in the range of 1 to 30% by mass, more preferably 2 to 20% by mass, and most preferably 3 to 15% by mass. If the content of hair penetrant is less than 1% by mass, it may be difficult to obtain a hair penetration promotion effect of the active ingredients of the dye remover composition. If the content of hair penetrant exceeds 30% by mass, hair feel may deteriorate. It also may lead to a deterioration of the stability of the dye remover composition.
In order to obtain a discoloration preventive effect by a synergetic effect of the reducing sugar and hair penetrant, when the reducing sugar is xylose, the ratio of xylose to hair penetrant in the dye remover composition is preferably in the range of 1:0.1 to 1:5, more preferably 1:0.1 to 1:3, and most preferably 1:0.2 to 1:2. If the ratio of xylose to hair penetrant is 1:0.1 to 1:5, the mass ratio of xylose to hair penetrant is in the range of 0.1 to 5.
Similarly, when the reducing sugar is dihydroxyacetone, the ratio of dihydroxyacetone to hair penetrant in the dye remover composition is preferably in the range of 1:0.05 to 1:5, more preferably 1:0.05 to 1:3, and most preferably 1:0.1 to 1:2. If the ratio of dihydroxyacetone to hair penetrant is 1:0.05 to 1:5, the mass ratio of dihydroxyacetone to hair penetrant is in the range of 0.05 to 5. In the specific examples of reducing sugar other than xylose and dihydroxyacetone, the ratio of reducing sugar to hair penetrant is determined by measuring the reducing power of the constituent sugar residue (the reducing terminal group in the reducing sugar molecule) or the reducing power of the reducing sugar per unit mass.
The second agent may include at least one selected from the group consisting of, for example, water, a water soluble high polymer compound, a surfactant, an oily ingredient, a polyhydric alcohol, an antiseptic agent, a chelating agent, a stabilizing agent, a pH adjuster, a plant extract, a herbal extract, a vitamin, a fragrant material, and ultraviolet absorbing agents according to need.
Water functions as a solubilizing agent for the reducing agent. A water soluble high polymer compound functions as a viscosity improver, which gives a suitable viscosity to the dye remover. Examples of water soluble high polymer compound include Arabian gum, karaya gum, gum tragacanth, alginate sodium, xanthan gum, a cellulose derivative, crosslinked polyacrylic acid, and polychlorinated dimethylmethylene piperidium.
An oily ingredient provides moisture to hair. Therefore, the second agent preferably includes an oily ingredient. Examples of oily ingredient include a fat, a wax, a higher alcohol, a hydrocarbon, a higher fatty acid, an alkyl glyceryl ether, an ester, and a silicone.
Examples of fat include olive oil, camellia oil, shea butter, almond oil, tea seed oil, camellia sasanqua oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef tallow, cacao butter, corn oil, peanut oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, coix lacryma-jobi seed oil, grape seed oil, avocado oil, carrot oil, macadamia nut oil, castor oil, flaxseed oil, coconut oil, mink oil, and egg yolk oil. Examples of wax include beeswax, candelilla wax, carnaiba wax, jojoba oil, and lanolin.
Examples of higher alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, and lanolin alcohol.
Examples of hydrocarbon include α-olefin oligomer, light isoparaffin, light liquid isoparaffin, synthetic squalane, vegetable squalane, squalane, polybutene, liquid isoparaffin, liquid paraffin, ozokerite, ceresin, paraffin, polyethylene powder, microcrystalline wax, and vaseline.
Examples of higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid, 12-hydroxystearic acid, oleic acid, undecylenic acid, linoleic acid, ricinoleic acid, and lanolin fatty acid. Examples of alkyl glyceryl ether include batyl alcohol (monostearyl glyceryl ether), chimyl alcohol (monocetyl glyceryl ether), selachyl alcohol (monooleyl glyceryl ether), and isostearyl glyceryl ether.
Examples of ester include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, 2-hexyldecyl adipate, diisostearyl adipate, isopropyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, diisopropyl sebacate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, stearyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyl octanoate, triisodecyl myristate, isostearyl myristate, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, (cholesteryl/lanosterol) fatty acid ester (C10 to 30), lauryl lactate, cetyl lactate, myristyl lactate, octyldodecyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, 12-cholesteryl hydroxystearate, di-2-ethyleneglycol ethyl hexanoate, dipentaerythritol fatty acid ester, N-alkylglycol monoisostearate, cetyl caprate, glyceryl tricaprylate, neopentyl glycol dicaprate, diisostearyl malate, and a lanolin derivative.
Examples of silicone include dimethyl polysiloxane, methylphenyl polysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether modified silicone, highly polymerized silicone having an average degree of polymerization of 650 to 10,000, amino modified silicone, betaine modified silicone, alkyl modified silicone, alkoxy modified silicone, mercapto modified silicone, carboxy modified silicone, and fluorine modified silicone. These specific examples of oily ingredient may be included singularly, or two or more may be included in combination.
Examples of polyhydric alcohol include a glycol and a glycerine. Examples of glycol include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, and 1,3-butylene glycol. Examples of glycerine include glycerine, diglycerine, and polyglycerine.
A surfactant maintains the stability of the first agent of the dye remover composition as an emulsifying agent or solubilizing agent. Examples of surfactant include a nonionic surfactant, a cationic surfactant, an anionic surfactant, and an ampholytic surfactants.
Examples of nonionic surfactant include a polyoxyethylene (referred to as POE hereinafter) alkyl ether, a POE alkyl phenyl ether, a POE polyoxypropylene alkyl ether, a POE sorbitan fatty acid ester, a POE propylene glycol fatty acid ester, and an aliphatic alkanolamide.
Examples of cationic surfactant include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, behenyltrimethylammonium methylsulfate, stearyltrimethylammonium saccharin, and cetyltrimethylammonium saccharin.
Examples of anionic surfactant include an alkyl sulfate, a POE alkyl sulfate, an alkyl sulfate ester salt, sodium methyl stearoyl taurate, triethanolamine dodecylbenzenesulfonate, sodium tetradecene sulfonate, POE laurylether phosphate and the salt thereof, N-lauroyl glutamate, and N-lauroylmethyl-β-alanine. Example of alkyl sulfate includes sodium lauryl sulfate. Example of POE alkyl sulfate includes sodium POE lauryl ether sulfate. Example of alkyl sulfate ester salt includes triethanolamine lauryl sulfate.
Examples of ampholytic surfactant include sodium 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, cocamidopropyl betaine, and lauryl dimethylaminoacetic betaine.
Example of antiseptic agent includes paraben. Example of chelating agent includes disodium ethylenediaminetetraacetate (EDTA-2Na). Examples of stabilizing agent include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. Examples of pH adjuster include phosphoric acid, citric acid, sulfuric acid, acetic acid, lactic acid, tartaric acid, and malic acid.

A dye remover composition is prepared by mixing the first agent and second agent in a predetermined proportion. In doing so, the reducing agent in the first agent is dissolved in the second agent. The dye remover composition is applied to hair stained by color development of polymers produced by oxidation polymerization of the oxidation dye by using an applicator such as brush or comb. In doing so, polymers staining hair are depolymerized (degraded) or off-resonated by the reduction action of the reducing agent. After the destaining treatment, the oxidation dye, which is converted to monomers or lower molecular weight substances, derived from the hair dye composition remains in hair. The reducing sugar in the dye remover composition suppresses oxidation polymerization of the oxidation dye due to air oxidation. As a result, the discoloration of hair is suppressed. More specifically, Maillard reaction occurs, wherein an amino group of the dye intermediate remaining in hair and an aldehyde group or keto group of the reducing sugar are bound. As a result, repolymerization of the dye intermediate due to air oxidation is suppressed, resulting in suppression of the discoloration of hair.
Advantages exerted by the present embodiment will be described hereinafter.
(1) In the present embodiment, the dye remover composition, which is applied to hair stained with an oxidation dye including a dye intermediate having an amino group, includes a reducing sugar. Therefore, it is possible to prevent air oxidation after the destaining treatment. More specifically, by binding an amino group of the dye intermediate remaining in hair, wherein the intermediate is converted to monomers or lower molecular weight substances, with an aldehyde group or keto group of the reducing sugar after the destaining treatment, repolymerization (discoloration) of the dye intermediate due to oxygen in the air is suppressed.
(2) The dye remover composition of the present embodiment includes a neutral reducing sugar instead of strong acid α-oxocarboxylic acid. Therefore, when the dye remover composition is applied to the scalp, it is possible to reduce the irritation to the scalp.
(3) In the present embodiment, when a monosaccharide is used as the reducing sugar, the advantages of the present invention are exerted by using a small amount of reducing sugar. This is because the reducing power of the constituent sugar residue or the reducing power per unit mass of the monosaccharide is higher than the reducing power of the constituent sugar residue or the reducing power per unit mass of reducing disaccharides or reducing oligosaccharide. For example, maltose, which is a reducing disaccharide, has two glucose molecules as the constituent sugars, namely, which compose maltose, wherein a reducing terminal group of one of the two glucose molecules is used for binding. Accordingly, maltose only has one reducing terminal group. Therefore, in comparison with glucose, which is a monosaccharide, the reducing power of the constituent sugar residue or the reducing power per unit mass of maltose is approximately half. In order to obtain the reducing power equivalent to that of glucose, which is a monosaccharide, with maltose, approximately double as much as glucose (% by mass) is required.
(4) In the present embodiment, when at least one selected from the group consisting of xylose and dihydroxyacetone is used as the reducing sugar, the advantages of the present invention are exerted by using a small amount of reducing sugar. This is because the reducing power of xylose and dihydroxyacetone per unit mass is higher than the reducing power of hexoses and heptoses per unit mass. Moreover, xylose and hydroxyacetone are inexpensive and readily available in comparison with other monosaccharides.
(5) In the present embodiment, when at least one selected from the group consisting of an ascorbic acid, a thioglycolic acid, a cysteine, a mercapto compound, a sulfite, a bisulfite, and a thiosulfate is used as the reducing agent, the destaining operation is easily performed. This because the reducing agent is excellent in depolymerizing or off-resonating polymers having a low polymerization ratio.
(6) When the dye remover composition of the present embodiment includes a hair penetrant, the permeability of the reducing sugar to hair is improved, and discoloration preventive effect is further improved.
(7) When xylose is used as the reducing sugar in the present embodiment, by setting the content of xylose in the dye remover composition to the range of 0.5 to 30% by mass, the deterioration of hair feel by making hair sticky, for example, is suppressed, and the discoloration of hair after the destaining treatment is sufficiently suppressed.
(8) When dihydroxyacetone is used as the reducing sugar in the present embodiment, by setting the content of dihydroxyacetone in the dye remover composition to the range of 0.05 to 30% by mass, the deterioration of hair feel by making hair sticky, for example, is suppressed, and the discoloration of hair after the destaining treatment is sufficiently suppressed.
The following modifications may be made in the above embodiment.
In the above embodiment, the dye remover composition is applied to head hair. However, the dye remover composition may be applied to fiber other than head hair, which can be stained by an oxidation dye, such as human hair other than head hair, sheep wool, and feather. In such case, air oxidation after the destaining treatment can be prevented.
The dye remover composition of the above embodiment consists of the first agent and second agent, and the first agent and second agent are mixed immediately prior to the use of the dye remover composition. However, the dye remover composition may be composed of a single formulation consisting of a solution including all the components included in the dye remover composition. Moreover, the dye remover composition may be applied to hair after preparing a dye remover composition by dissolving components in a solid form such as a reducing agent and reducing sugar in water by a user who uses the dye remover composition. Examples of reducing agent in a solid form include an ascorbic acid in a powder form. The dye remover composition may be composed of triple formulation or more by arbitrarily separating the components composing the first agent and second agent of the dye remover composition. For example, the reducing sugar may be excluded from the first agent and second agent. After mixing the first agent and second agent to prepare the dye remover composition, the reducing sugar may be added to the mixture thereof.
In the above embodiment, The reducing sugar may be included in the first agent of the dye remover composition instead of the second agent of the dye remover composition.
The hair dye composition of the above embodiment consists of the first agent and second agent, and the first agent and second agent are mixed immediately prior to the use of the hair dye composition. However, the hair dye composition may be composed of triple formulation or more by arbitrarily separating the components composing the first agent and second agent of the hair dye composition. For example, the hair dye composition may be composed of the first agent including an oxidation dye including a dye intermediate having an amino group, the second agent including an alkaline agent, and the third agent including an oxidation agent. In this composition, since the oxidation dye is separated from the alkaline agent, the storage stability of the oxidation dye is improved. Moreover, all the components composing the hair dye composition may be separated, and the components may be mixed immediately prior to the use of the hair dye composition.
In the above embodiment, the first agent of the dye remover composition is provided in a powder form in order to improve the stability of the reducing agent. However, the form of the first agent is not specifically limited, and the first agent may be provided in a liquid, gel, or cream form by including a solvent such as water in the first agent.

Examples

Next, the above embodiment will be described in further detail with reference to Examples and Comparative Examples.
The first agent and second agent of the hair dye composition were prepared, wherein the agents included the components shown in Table 1. The value in the column representing each component in Table 1 is the content of the component in the corresponding column, and the unit is % by mass. Subsequently, the hair dye composition was prepared by mixing the first agent and second agent at 1:1 mass ratio. The obtained hair dye composition was applied to a medium brown human hair bundle (referred to simply as a hair bundle hereinafter) by using a brush, and left to stand for 30 minutes at room temperature (25° C.). Next, after the hair dye composition adhered to the hair bundle was washed with water, the hair bundle was subjected to shampoo twice, and hair conditioner was applied to the bundle once. Subsequently, the hair bundle was left to stand for a day after being dried with warm air.

	TABLE 1

	<First agent>
	28% Ammonia water	5
	Ascorbic acid	0.5
	Sodium sulfite	0.2
	Sodium lauryl sulfate	2
	Stearyl alcohol	10
	POE(30) stearyl ether	10
	Disodium EDTA	0.5
	Paraphenylenediamine	0.5
	2,4-diaminophenoxyethanol	1
	hydrochloride
	Purified water	Residual quantity
	Total	100
	<Second agent>
	35% Hydrogen peroxide	16
	Sodium stannate	0.1
	EDTA	0.5
	Cetanol	5
	Sodium lauryl sulfate	1
	Purified water	Residual quantity
	Total	100

Moreover, the first agent and second agent of the dye remover composition were prepared, wherein the agents included the components shown in Table 2. The value in the column representing each component in Table 2 is the content of the component in the corresponding column, and the unit is % by mass. Subsequently, the dye remover composition was prepared by mixing the first agent and second agent at 1:10 mass ratio. The obtained dye remover composition was applied to the hair bundle treated with the above mentioned staining treatment by using a brush, and left to stand for 30 minutes at room temperature (25° C.).
Next, after the dye remover composition adhered to the hair bundle was washed with water, the hair bundle was subjected to shampoo twice, and hair conditioner was applied to the bundle once. The bundle was then dried with warm air. Subsequently, the L*a*b* value (L₁, a₁, and b₁) was measured for the hair bundle treated with the destaining treatment by using a spectral photometer (Minolta Co., Ltd., Model number: CM-508d). The pH of the second agent and dye remover composition in each example shown in Table 2 was also measured.

After the hair bundle treated with the above described destaining treatment was left to stand for 24 hours in a temperature controlled bath at 40° C., the L*a*b* value (L₂, a₂, and b₂) was measured by using the spectral photometer.
From the L*a*b* values of an untreated hair bundle, the hair bundle treated with the destaining treatment, and the hair bundle after the isothermal treatment, respectively, the color difference (ΔE₁) between the untreated hair bundle and the hair bundle treated with the destaining treatment, and the color difference (ΔE₂) between the untreated hair bundle and the hair bundle after the isothermal treatment were calculated by the following formula (1).
ΔE _i={(L _i −L ₀)²+(a _i −a ₀)²+(b _i −b ₀)²}^1/2 (1)
In the formula (1), L_irefers to the L* value of the hair bundle after the destaining treatment or the hair bundle after the isothermal treatment, a_irefers to the a* value of the hair bundle after the destaining treatment or the hair bundle after the isothermal treatment, b_irefers to the b* value of the hair bundle after the destaining treatment or the hair bundle after the isothermal treatment, and L₀, a₀, and b₀refer to the L* value, a* value and b* value for the untreated hair bundle, respectively.
Next, from ΔE₁and ΔE₂, the air reoxidation rate [%] was calculated by the following formula (2).
Air reoxidation rate [%]=(1−ΔE ₁ /ΔE ₂)×100 (2)
The lower the air reoxidation rate, the less the discoloration of hair in the isothermal treatment becomes. The calculation results of air reoxidation rate in each example are shown in Table 2.

The dye remover composition of each Example and Comparative Example was applied to the upper arm of each of five panelists. At 10 minutes after application, sensory evaluation for irritation felt by each panelist was performed in the following score of one to three. More specifically, irritation felt by the panelists was scored according to the following scores; 3 (when no irritation felt by the panelists), 2 (when weak irritation such as weak pain and slight smarting felt by the panelists), and 1 (when strong irritation such as strong pain and smarting felt by the panelists). The average score of the results of scoring by the 5 panelists was calculated. Subsequently, as the evaluation of sensory irritation, it was defined “favorable” when the average score calculated was 2.6 or more, “somewhat bad” when the average score calculated was from not less than 1.6 to not more than 2.5, and “bad” when the average score calculated was 1.5 or less. The evaluation results are shown in Table 2.

TABLE 2

				Comparative	Comparative	Comparative	Comparative
Example 1	Example 2	Example 3	Example 4	Example 1	Example 2	Example 3	Example 4

First	(Reducing agent)	100	100	100	100	100	100	100	100
agent	Ascorbic acid
Second	(Hair penetrant)	—	9	9	9	9	9	9	9
agent	Benzyl alcohol
	Lactic acid	2	2	2	2	2	2	2	2
	(Hair penetrant)	10	10	10	10	10	10	10	10
	95% Ethanol
	Xanthan gum	1	1	1	1	1	1	1	1
	(Reducing sugar)	5	5	—	—	—	—	—	—
	Xylose
	(Reducing sugar)	—	—	5	—	—	—	—	—
	Glucose
	(Reducing sugar)	—	—	—	5	—	—	—	—
	Dihydroxyacetone
	Trehalose	—	—	—	—	—	5	—	—
	Glyoxalic acid (a-	—	—	—	—	—	—	5	0.5
	oxocarboxylic acid)
	Purified water	Residual	Residual	Residual	Residual	Residual	Residual	Residual	Residual
		quantity	quantity	quantity	quantity	quantity	quantity	quantity	quantity
	Total	100	100	100	100	100	100	100	100
	Air reoxidation rate	3	0.1	3.3	0	11.8	9.3	0.2	7.1
	pH of second agent of	3	3	3	3	3	3	1.9	2.6
	dye remover
	composition
	pH of dye remover	2.7	2.7	2.7	2.7	2.7	2.7	1.6	2.2
	composition
	Sensory irritation	Favorable	Favorable	Favorable	Favorable	Favorable	Favorable	Bad	Somewhat
									bad

From the results shown in Table 2, it was found out that the pH of the dye remover compositions in Examples 1 through 4, wherein the second agents included xylose, glucose, or dihydroxyacetone as a reducing sugar, was higher than the pH of the dye remover compositions in Comparative Examples 3 and 4, because the dye remover compositions in Examples 1 through 4 did not include glyoxalic acid (α-oxocarboxylic acid). Therefore, the evaluation of sensory irritation was maintained “favorable” with the dye remover compositions in Examples 1 through 4. Furthermore, the air reoxidation rate was maintained low by the reducing sugar as well as that the evaluation of sensory irritation was maintained “favorable” with the dye remover compositions in Examples 1 through 4. The air reoxidation rate of the dye remover composition in Example 2, wherein the second agent included benzyl alcohol as a hair penetrant, was maintained lower, in comparison with the air reoxidation rate of the dye remover composition in Example 1.
On the other hand, it was found out that the air reoxidation rate could not be maintained low with the dye remover composition in Comparative Example 1, wherein the composition did not include a reducing sugar, and the dye remover composition in Comparative Example 2, wherein the composition included trehalose instead of a reducing sugar. With the dye remover composition in Comparative Example 3, wherein the composition included glyoxalic acid, although the air reoxidation rate was maintained low, the evaluation of sensory irritation could not be maintained favorably. When the content of glyoxalic acid was reduced, in comparison with Comparative Example 3, in Comparative Example 4 in order to reduce the sensory irritation, the air reoxidation rate became higher, in comparison with Comparative Example 3. Therefore, it was found out that glyoxalic acid could not reduce the air reoxidation rate at the same time as it reduced the sensory irritation.

Claims

1. A dye remover composition used for destaining fiber stained with an oxidation dye including a dye intermediate having an amino group, the dye remover composition comprising:

a reducing agent, wherein the dye remover composition performs the destaining of fiber by the reduction action of the reducing agent; and

a reducing sugar,

wherein the reducing agent is at least one selected from the group consisting of an ascorbic acid, a thioglycolic acid, a cysteine, a mercapto compound, a sulfite, a bisulfite, and a thiosulfate.

2. The dye remover composition according to claim 1, wherein the reducing sugar is a monosaccharide.

3. The dye remover composition according to claim 2, wherein the monosaccharide is at least one selected from the group consisting of xylose and dihydroxyacetone.

4. (canceled)

5. The dye remover composition according to claim 1, further comprising a hair penetrant.

6. The dye remover composition according to claim 5, wherein the hair penetrant is an aromatic alcohol.

7. The dye remover composition according to claim 5, wherein the reducing sugar is xylose, and the mass ratio of xylose to the hair penetrant is in the range of 0.1 to 5.

8. The dye remover composition according to claim 1, wherein the reducing sugar is xylose, and the content of xylose in the dye remover composition is in the range of 0.5 to 30% by mass.

9. The dye remover composition according to claim 5, wherein the reducing sugar is dihydroxyacetone, and the mass ratio of dihydroxyacetone to the hair penetrant is in the range of 0.05 to 5.

10. The dye remover composition according to claim 1, wherein the reducing sugar is dihydroxyacetone, and the content of dihydroxyacetone in the dye remover composition is in the range of 0.05 to 30% by mass.