JP7242138B2 - Hair bleaching/destaining agent and hair treatment method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hair bleaching and destaining agent comprising at least a first agent containing an alkaline agent and a second agent containing an oxidizing agent. The present invention also relates to a method for treating hair using the hair bleaching/destaining agent.

In order to bleach or destain hair, a two-agent type hair bleaching/destaining agent comprising a first agent containing an alkaline agent and a second agent containing an oxidizing agent is widely used. Such hair bleaching and destaining agents are used by mixing the first agent and the second agent and applying the resulting mixture to the hair.

Patent Document 1 below discloses a hair bleaching agent comprising a first agent containing chromium oxide and/or red iron oxide, an alkaline agent, and a persulfate, and a second agent containing hydrogen peroxide. .

Patent Document 2 below discloses a colored composition containing hydrogen peroxide and an aromatic nitro compound. Patent Document 2 describes that this composition can be used as a second agent of a hair bleaching agent.

In Patent Document 3 below, either one of the first agent and the second agent is colored using one or two or more oxidation dyes, or both the first agent and the second agent are colored. are colored in different colors from each other. This hair dye composition is a two-agent foamy hair dye composition that is used by filling a container having a mechanism for simultaneously discharging the first and second agents. Patent Document 3 describes that the hair dye composition can be used as a hair bleaching agent.

Patent Document 4 below discloses a powdery bleaching aid composition containing a persulfate and sodium chloride, and a hair bleaching agent containing the powdery bleaching aid composition.

Japanese Patent Application Laid-Open No. 2006-342125 JP-A-63-035406 JP-A-10-287534 JP 2006-225354 A

In the conventional multi-agent type hair bleaching and destaining agent, the mixing properties of the first agent and the second agent are sometimes inferior. If the first agent is in the form of powder, the mixability is particularly likely to deteriorate, and for example, the first agent may scatter when the first agent and the second agent are mixed. Further, when the first agent contains a persulfate, if the first agent and the second agent are insufficiently mixed, the persulfate locally becomes highly concentrated in the mixture, and the oxidizing agent Since the decomposition reaction is excessively accelerated, the mixture foams and generates heat.

When the viscosity of the mixture is lowered in order to improve the mixability, the adhesion to the hair is lowered, and the mixture tends to drip from the hair. If the viscosity of the mixture is low, the adhesion to short hair portions (for example, shaved portions) is particularly low, and dripping is more likely to occur. A decrease in adhesion to hair results in a decrease in bleaching power.

In the hair bleaching agents described in Patent Documents 1 to 3 above, since the first agent or the second agent is colored, the mixed state of the first agent and the second agent can be easily confirmed, It is difficult to improve the miscibility of the first agent and the second agent. Moreover, with the hair bleaching agents described in Patent Documents 1 to 3, the viscosity of the mixture is not sufficiently high, and it is difficult to improve the adhesion to hair.

With the hair bleaching agent described in Patent Document 4, the mixability can be improved to some extent. However, even with the hair bleaching agent described in Patent Document 4, it may be difficult to sufficiently improve the mixability. In addition, with the hair bleaching agent described in Patent Document 4, the viscosity of the mixture is not sufficiently high, and it is difficult to sufficiently improve the adhesion to hair.

An object of the present invention is to provide a hair bleaching/de-staining agent that allows the first agent and the second agent to be mixed satisfactorily and enhances the adhesion of the obtained mixed agent to the hair. be. Another object of the present invention is to provide a method for treating hair that can enhance the adhesion of the mixture to the hair.

The present invention comprises a powdery first agent containing an alkaline agent, an oxidizing agent, and a tertiary amine-type cationic surfactant, and having a viscosity at 25° C. of 11000 mPa·s or less. A hair bleaching/de-staining agent comprising at least two agents, wherein the viscosity of a liquid obtained by mixing 2 parts by mass of the second agent with respect to 1 part by mass of the first agent is 18000 mPa s or more at 25 ° C. offer.

The hair bleaching and destaining agent of the present invention is such that a mixture obtained by mixing a plurality of agents including the first agent and the second agent has a viscosity of 18000 mPa s or more at 25 ° C. is preferably used by mixing.

The present invention comprises a powdery first agent containing an alkaline agent, an oxidizing agent, and a tertiary amine-type cationic surfactant, and having a viscosity at 25° C. of 11000 mPa·s or less. A hair bleaching and destaining agent comprising at least two agents, wherein a mixture obtained by mixing a plurality of agents including the first agent and the second agent has a viscosity at 25° C. of 18000 mPa·s or more.

In the hair bleaching and destaining agent of the present invention, the alkaline agent preferably contains a persulfate.

Further, the present invention provides a powdery first agent containing an alkaline agent, an oxidizing agent and a tertiary amine-type cationic surfactant, and a second agent having a viscosity at 25° C. of 11000 mPa·s or less. obtaining a mixture by mixing a plurality of agents including the first agent and the second agent using a hair bleaching/dedying agent comprising at least two agents; and applying the mixture to the hair. and wherein the mixture has a viscosity of 18000 mPa·s or more at 25°C.

The hair bleaching and destaining agent of the present invention contains an alkali agent and a powdery first agent, an oxidizing agent, and a tertiary amine cationic surfactant, and has a viscosity at 25°C of and a second agent having a viscosity of 11000 mPa·s or less. In the hair bleaching and destaining agent of the present invention, a liquid obtained by mixing 2 parts by mass of the second agent with 1 part by mass of the first agent, or a plurality of agents containing the first agent and the second agent The viscosity at 25° C. of the admixture obtained by mixing is 18000 mPa·s or more. Since the hair bleaching and destaining agent of the present invention has the above configuration, the first agent and the second agent can be well mixed, and the adhesion of the resulting mixture to the hair is improved. can be enhanced.

The hair treatment method of the present invention contains an alkali agent and a powdery first agent, an oxidizing agent and a tertiary amine cationic surfactant, and has a viscosity at 25° C. of 11000 mPa·s or less. A hair bleaching and destaining agent comprising at least a second agent is used. The hair treatment method of the present invention comprises the steps of mixing a plurality of agents including the first agent and the second agent to obtain a mixture, and applying the mixture to the hair. In the hair treatment method of the present invention, the viscosity of the mixture at 25° C. is 18000 mPa·s or more. In the hair treatment method of the present invention, the adhesion of the mixture to the hair can be enhanced.

The present invention will be described in detail below.

The hair bleaching and destaining agent of the present invention contains an alkali agent and a powdery first agent, an oxidizing agent, and a tertiary amine cationic surfactant, and has a viscosity at 25°C of and a second agent having a viscosity of 11000 mPa·s or less.

In the hair bleaching and destaining agent of the present invention, a liquid obtained by mixing 2 parts by mass of the second agent with 1 part by mass of the first agent, or a plurality of agents containing the first agent and the second agent The viscosity at 25° C. of the admixture obtained by mixing is 18000 mPa·s or more.

Since the hair bleaching and destaining agent of the present invention has the above configuration, the first agent and the second agent can be well mixed, and the adhesion of the resulting mixture to the hair is improved. can be enhanced. In the present invention, the state of low viscosity is maintained during mixing of the first agent and the second agent, the first agent and the second agent can be well mixed, and after mixing, the mixture is Viscosity is increased, and adhesion to hair can be enhanced.

In addition, since the hair bleaching/destaining agent of the present invention has the above constitution, the bleaching/destaining power can be enhanced.

Each of the alkaline agent, the oxidizing agent, and the tertiary amine cationic surfactant may be used alone or in combination of two or more.

The first agent and the second agent are mixed, or when the hair bleaching / destaining agent comprises three or more agents, three or more agents (the first agent and the second agent) and other compositions (for example, a third agent, etc.)) are mixed to prepare a mixed solution, and the obtained mixed solution is applied to the hair for use. In this specification, the mixed liquid may be referred to as a "mixed agent". Therefore, the admixture is the application liquid that is applied to the hair.

The details of each component used in the hair bleaching and destaining agent of the present invention are described below.

[First agent (first agent composition)]
The properties of the first agent are powdery.

(Alkaline agent)
The first agent contains an alkaline agent. Only one type of alkaline agent may be used, or two or more types may be used.

Examples of the alkali agent include persulfate, sodium silicate, sodium metasilicate, ammonia, ammonium hydrogen carbonate, ammonium carbonate, sodium hydrogen carbonate, sodium carbonate, isopropanolamine, monoethanolamine, diethanolamine, triethanolamine, and 2- and amino-2-methyl-1-propanol.

Examples of the persulfate include ammonium persulfate, sodium persulfate and potassium persulfate.

From the viewpoint of promoting the decomposition of melanin in hair more effectively and exhibiting excellent bleaching and destaining effects in a short period of time, the alkaline agent is a group consisting of persulfate, sodium silicate and sodium metasilicate. It is preferable to contain an alkaline agent (at least one alkaline agent) selected from the above, more preferably an alkaline agent (at least one alkaline agent) selected from the group consisting of persulfate and sodium metasilicate, persulfate It is more preferred to contain a salt.

The persulfate content in 100% by mass of the alkaline agent is preferably 60.0% by mass or more, more preferably 65.0% by mass or more, preferably 90.0% by mass or less, and more preferably 80% by mass. It is 0% by mass or less. When the content of the persulfate is at least the lower limit, the decolorizing and destaining power can be further enhanced. When the content of the persulfate is equal to or less than the above upper limit, excessive heat generation and excessive foaming during mixing of the first agent and the second agent can be suppressed.

The content of the alkaline agent in 100% by mass of the first agent is preferably 60.0% by mass or more, more preferably 70.0% by mass or more, preferably 90.0% by mass or less, and more preferably 85.0% by mass. % or less. When the content of the alkaline agent is equal to or higher than the lower limit and equal to or lower than the upper limit, the pH of the mixture can be easily adjusted within a suitable range, the viscosity of the mixture can be adjusted to a suitable range, and the composition can be applied to the hair. Adhesiveness and coatability can be further improved. The content of the alkaline agent is the total content of all the alkaline agents in the first agent.

(other ingredients)
The said 1st agent may contain other components other than an alkaline agent. The properties of the other components are powdery.

Other components include sodium chloride, anhydrous silicic acid, and magnesium carbonate.

The first agent preferably contains sodium chloride. By including sodium chloride in the first agent, the miscibility between the first agent and the second agent can be further enhanced.

When the first agent contains sodium silicate and sodium chloride, the mass ratio of the content of sodium chloride in the first agent to the content of sodium silicate in the first agent (content of sodium chloride / silica sodium acid content) is preferably 1.0 or more, more preferably 1.5 or more, still more preferably 2.0 or more, preferably 7.0 or less, and more preferably 5.0 or less. When the mass ratio (content of sodium chloride/content of sodium silicate) is equal to or more than the lower limit and equal to or less than the upper limit, coatability can be enhanced.

[Second agent (second agent composition)]
(Tertiary amine type cationic surfactant)
The second agent contains a tertiary amine cationic surfactant. Only one type of tertiary amine cationic surfactant may be used, or two or more types may be used.

By using a tertiary amine cationic surfactant, the first agent and the second agent can be well mixed, and the adhesion of the obtained mixed agent to the hair can be enhanced. A tertiary amine-type cationic surfactant has a property of having a low viscosity at a relatively low pH (for example, pH of 4 or less) and increasing in viscosity as the pH increases. By using a tertiary amine-type cationic surfactant, the state of low viscosity is maintained during mixing of the first agent and the second agent, and the first agent and the second agent can be well mixed. After mixing, the action of the alkaline agent contained in the first part raises the pH of the mixture, so that the viscosity of the mixture increases and the adhesion to the hair can be enhanced.

Moreover, by using a tertiary amine type cationic surfactant, it is possible to improve treatment properties and conditioning properties.

Tertiary amine cationic surfactants include stearic acid diethylaminoethylamide, behenic acid diethylaminoethylamide, palmitic acid diethylaminoethylamide, myristate diethylaminoethylamide, lauric acid diethylaminoethylamide, coconut oil fatty acid diethylaminoethylamide, stearin. acid dimethylaminopropylamide, behenic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, myristate dimethylaminopropylamide, lauric acid dimethylaminopropylamide, coconut fatty acid dimethylaminopropylamide, stearic acid dimethylaminoethylamide, behenine acid dimethylaminoethylamide, palmitic acid dimethylaminoethylamide, myristate dimethylaminoethylamide, lauric acid dimethylaminoethylamide, coconut oil fatty acid dimethylaminoethylamide , behenyldimethylamine , stearyldimethylamine, palmitoxypropyldimethylamine, and stearoxypropyldimethylamine. The tertiary amine type cationic surfactant may be a salt of the above compound, or may be incorporated in the second agent in the form of a salt of the above compound.

From the viewpoint of further improving the mixability of the first part and the second part and further increasing the adhesion of the resulting mixture to the hair, the tertiary amine cationic surfactant is stearic acid. It preferably contains a tertiary amine cationic surfactant (at least one tertiary amine cationic surfactant) selected from the group consisting of dimethylaminopropylamide and diethylaminoethylamide stearate .

From the viewpoint of further improving the miscibility of the first agent and the second agent and further enhancing the adhesion of the resulting mixture to the hair, the tertiary amine-type cationic surfactant is A tertiary amine cationic surfactant selected from the group consisting of stearic acid dimethylaminopropylamide and stearic acid diethylaminoethylamide is more preferred. The second agent preferably contains a tertiary amine cationic surfactant selected from the group consisting of stearic acid dimethylaminopropylamide and stearic acid diethylaminoethylamide .

Only one tertiary amine cationic surfactant selected from the group consisting of stearic acid dimethylaminopropylamide and stearic acid diethylaminoethylamide may be used, or two or more types may be used. good.

The content of the tertiary amine cationic surfactant in 100% by mass of the second agent is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and still more preferably 0.8% by mass. above, particularly preferably 1.5% by mass or more, most preferably 3.0% by mass or more, preferably 25.0% by mass or less, more preferably 18.0% by mass or less, further preferably 15.0% by mass or less is. When the content of the tertiary amine-type cationic surfactant is at least the lower limit and no more than the upper limit, the viscosity of the mixture can be adjusted to a suitable range, thereby improving applicability and adhesion to hair. can be further enhanced. Moreover, when the content of the tertiary amine cationic surfactant is at least the lower limit, good treatment properties and conditioning properties can be achieved. The content of the tertiary amine cationic surfactant is the total content of all tertiary amine cationic surfactants in the second agent.

(Oxidant)
The second agent contains an oxidizing agent. Only one kind of oxidizing agent may be used, or two or more kinds thereof may be used.

Hydrogen peroxide etc. are mentioned as said oxidizing agent.

The content of the oxidizing agent in 100% by mass of the second agent is preferably 1.0% by mass or more, more preferably 3.0% by mass or more, preferably 12.0% by mass or less, and more preferably 6.0% by mass. % by mass or less. When the content of the oxidizing agent is at least the above lower limit, the decolorization/destaining effect is further enhanced. When the content of the oxidizing agent is equal to or less than the above upper limit, skin irritation is reduced.

(water)
The second agent preferably contains water. The water is preferably purified water.

The content of water in 100% by mass of the second agent can be appropriately adjusted depending on the type of container containing the second agent and the intended properties of the second agent, but is preferably 30.0% by mass or more. , more preferably 40.0% by mass or more, preferably 90.0% by mass or less, and more preferably 80.0% by mass or less.

(other ingredients)
The second agent may contain components other than the tertiary amine-type cationic surfactant and the oxidizing agent within a range that does not impair the effects of the present invention. Other components include lower alcohols having 2 to 5 carbon atoms, polyhydric alcohols, sugar alcohols, higher alcohols having 12 to 18 carbon atoms, ester oils, hydrocarbon oils, fats, waxes, silicone oils, and tertiary amine types. Surfactants other than cationic surfactants, stabilizers, sequestering agents, antioxidants, plant extracts, pH adjusters, fragrances, preservatives, solvents and the like can be mentioned.

Ethanol etc. are mentioned as said lower alcohol.

Examples of the polyhydric alcohol include glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2 -octanediol, 1,2-decanediol and polyoxypropylene methyl glucoside.

Examples of the sugar alcohol include sorbitol, maltitol and trehalose.

Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, and oleyl alcohol.

Examples of the ester oils include isopropyl palmitate, glyceryl tri-2-ethylhexanoate, isopropyl myristate, propylene glycol monostearate, propylene glycol monolaurate, and polyglyceryl isostearate.

Examples of the hydrocarbon oils include liquid paraffin, petrolatum, squalene, and squalane.

Examples of the fats and oils include olive oil, camellia oil, macadamia nut oil, and avocado oil.

Examples of the wax include carnauba wax, candelilla wax, beeswax, and lanolin.

Examples of the stabilizer include disodium edetate, tetrasodium pyrophosphate, and phosphoric acid.

It is preferable that the second agent does not contain the polyhydric alcohol or contains the polyhydric alcohol in an amount of 0.5% by mass or more. When the second agent contains the polyhydric alcohol, the content of the polyhydric alcohol in 100% by mass of the second agent is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, It is preferably 10.0% by mass or less, more preferably 8.0% by mass or less. When the content of the polyhydric alcohol is at least the lower limit, the viscosity of the mixture can be easily adjusted to a suitable range. When the content of the polyhydric alcohol is equal to or less than the above upper limit, the effect of thickening the mixture due to the tertiary amine cationic surfactant can be exhibited more effectively.

The properties of the second agent are not particularly limited, and may be liquid, gel, or cream. The properties of the second agent are preferably liquid, gel or cream, more preferably cream.

(Other details of the first agent and the second agent)
The second agent has a viscosity of 11000 mPa·s or less at 25°C. If the viscosity of the second agent at 25° C. exceeds 11000 mPa·s, the miscibility between the first agent and the second agent may be poor.

The viscosity of the second agent at 25° C. is preferably 1000 mPa·s or more, preferably 10100 mPa·s or less, more preferably 9000 mPa·s or less, still more preferably 7000 mPa·s or less. Handleability can be improved as the said viscosity is more than the said minimum. When the viscosity is equal to or less than the upper limit, the first agent and the second agent can be mixed even more satisfactorily. The second agent may have a viscosity of less than 1000 mPa·s at 25°C.

The above viscosity was measured using a viscometer. It is measured using 4 rotors at a rotation speed of 12 rpm or 6 rpm and a rotation time of 1 minute. As the viscometer, a TV-25 type viscometer manufactured by Toki Sangyo Co., Ltd. can be used.

The pH of the second agent is preferably 1.0 or higher, more preferably 2.0 or higher, preferably 4.5 or lower, and more preferably 4.0 or lower. When the pH is equal to or higher than the lower limit, the stability of the oxidizing agent (hydrogen peroxide) is improved. When the pH is equal to or lower than the upper limit, the viscosity of the second agent at 25°C can be easily adjusted within the above preferred range, and the first agent and the second agent can be mixed even more satisfactorily.

As a method for producing the first agent and the second agent, a known method for producing the first agent and the second agent can be adopted. Examples of the method for producing the first agent and the second agent include a method of homogenizing by stirring each component with a paddle mixer or the like.

(Other details of hair bleaching and destaining agents)
The hair bleaching and destaining agent of the present invention comprises at least the first agent and the second agent. The hair bleaching and destaining agent of the present invention is a hair bleaching and destaining agent kit comprising at least the first agent and the second agent. The hair bleaching and destaining agent of the present invention is a multi-component hair bleaching and destaining agent.

The hair bleaching and destaining agent of the present invention may further comprise a third agent (third agent composition) in addition to the first agent and the second agent. The third agents include bleaching agents, hair rinse agents, hair treatment agents, hair conditioning agents, and the like. Further, the hair bleaching and destaining agent of the present invention may comprise a third agent such as a bleaching agent and a fourth agent (fourth agent composition) such as a hair rinse agent, hair treatment agent or hair conditioning agent. good.

The hair bleaching/decoloring agent of the present invention may be a two-component hair bleaching/de-staining agent, a three-component hair bleaching/de-staining agent, or a four-component hair bleaching/de-staining agent. It may be a destaining agent. The hair bleaching/de-staining agent of the present invention is preferably a two-component hair bleaching/de-staining agent comprising the first agent and the second agent because of its excellent operability.

The said 1st agent and said 2nd agent can be preserve|saved in the form accommodated in the container, or can be used. Examples of the container include a plastic container, an aluminum tube container, a pouch container, an aerosol container, and the like. Although the container is not particularly limited, it is preferably an aluminum tube container from the viewpoint of enhancing convenience.

The hair bleaching / destaining agent of the present invention is obtained by mixing the first agent and the second agent, or by combining the first agent, the second agent and other ingredients (for example, the third agent). After mixing to prepare a mixture, the resulting mixture is used by applying it to the hair. The hair bleaching and destaining agents of the present invention are mixed and used as a mixture.

The properties of the mixture are not particularly limited, and may be liquid, gel, or cream. From the viewpoint of effectively enhancing the adhesion of the mixture to the hair, the mixture is preferably gel-like or cream-like.

In general, commercial products of hair bleaching and destaining agents often have a fixed mixing ratio of a plurality of agents. Moreover, in commercial products of hair bleaching and destaining agents, a plurality of agents may be mixed and used in their entirety.

In the two-part type hair bleaching/de-staining agent consisting of the first part and the second part, the mixture is obtained by mixing the first part and the second part. In the three-agent type hair bleaching/de-staining agent consisting of the first agent, the second agent, and the third agent, the first agent, the second agent, and the third agent are mixed to form a mixture. can get. In the 4-agent type hair bleaching and destaining agent comprising the 1st agent, the 2nd agent, the 3rd agent and the 4th agent, the 1st agent, the 2nd agent, the 3rd agent and the 4th agent are mixed to obtain an admixture.

From the viewpoint of enhancing the adhesion to hair, a liquid obtained by mixing 1 part by mass of the first agent with 2 parts by mass of the second agent (hereinafter sometimes referred to as "liquid X"), or the first agent and a plurality of agents including the second agent (when the hair bleaching/hair bleaching/destaining agent is a two-agent type, the first agent and the second agent) are mixed. The viscosity at 25 ° C. of the mixture is It is 18000 mPa·s or more.

Liquid X is prepared for measuring the viscosity. The liquid X may be a mixture or may be different from the mixture.

From the viewpoint of further enhancing the adhesion to hair, the viscosity of liquid X at 25° C. is preferably 20,000 mPa·s or more, preferably 60,000 mPa·s or less, and more preferably 50,000 mPa·s or less.

From the viewpoint of further increasing the adhesion to the hair, a plurality of agents including the first agent and the second agent agent) at 25° C. is preferably 20,000 mPa·s or more, preferably 60,000 mPa·s or less, and more preferably 50,000 mPa·s or less.

From the viewpoint of enhancing the adhesion to hair, the hair bleaching/decoloring agent of the present invention comprises a plurality of agents including the first agent and the second agent (hair bleaching, hair bleaching, and destaining agents are a two-agent formula). In some cases, it is preferable to use a mixture of the above agents so that the mixed agent obtained by mixing the first agent and the second agent) has a viscosity of 18000 mPa·s or more at 25°C. From the viewpoint of further enhancing the adhesion to hair, the hair bleaching/destaining agent of the present invention has a viscosity of the mixture at 25°C of preferably 20,000 mPa·s or more, preferably 60,000 mPa·s or less, and more preferably. It is preferable to use a mixture of the plurality of agents so that the viscosity is 50000 mPa·s or less.

The above viscosity was measured using a viscometer. It is measured using 4 rotors at a rotation speed of 12 rpm or 6 pm and a rotation time of 1 minute. As the viscometer, a TV-25 type viscometer manufactured by Toki Sangyo Co., Ltd. can be used.

The ratio of the viscosity of liquid X at 25°C to the viscosity of the second agent at 25°C (viscosity of liquid X at 25°C/viscosity of second agent at 25°C) is preferably 1.5 or more, Preferably it is 60 or less. When the above ratio (viscosity of liquid X at 25° C./viscosity of second agent at 25° C.) is at least the above lower limit, the effects of the present invention can be exhibited more effectively. If the ratio (viscosity of liquid X at 25°C/viscosity of second agent at 25°C) is equal to or less than the above upper limit, handleability can be enhanced. The above ratio (viscosity of liquid X at 25° C./viscosity of second agent at 25° C.) may exceed 60.

The ratio of the viscosity of the admixture at 25°C to the viscosity of the second agent at 25°C (viscosity of the admixture at 25°C/viscosity of the second agent at 25°C) is preferably 1.5 or more, Preferably it is 60 or less. When the ratio (viscosity of the mixture at 25°C/viscosity of the second agent at 25°C) is at least the above lower limit, the effect of the present invention can be exhibited more effectively. If the ratio (viscosity of the admixture at 25°C/viscosity of the second agent at 25°C) is equal to or less than the above upper limit, handleability can be enhanced. In addition, the ratio (viscosity at 25° C. of the admixture/viscosity at 25° C. of the second agent) may exceed 60.

The pH of the liquid X or the mixture is preferably 6 or higher, more preferably 7 or higher, preferably 11 or lower, and more preferably 10 or lower. When the pH is equal to or higher than the lower limit, the viscosity of the mixture at 25°C can be easily adjusted within the above preferred range, and adhesion to hair and applicability can be enhanced. When the pH is equal to or lower than the upper limit, skin irritation is reduced.

The mixing ratio when mixing the first agent and the second agent is not particularly limited. From the viewpoint of good mixing of the first agent and the second agent, the second agent is preferably 0.5 parts by mass or more, more preferably 0.8 parts by mass or more, per 1 part by mass of the first agent. , preferably 8.0 parts by mass or less, more preferably 6.0 parts by mass or less, to obtain a mixture.

(Method for bleaching and destaining hair using hair bleaching and destaining agent)
The hair can be bleached or destained using the hair bleaching/destaining agent of the present invention.

The method for bleaching/decoloring hair using the hair bleaching/dedying agent includes a first step of obtaining a mixture by mixing a plurality of agents including the first agent and the second agent; and a second step of applying to the hair. When the hair bleaching/decoloring agent is a two-agent type hair bleaching/decoloring agent, the hair treatment method using the hair bleaching/decoloring agent comprises mixing the first agent and the second agent. and a second step of applying the mixture to the hair.

The coating method in the second step is not particularly limited. Examples of the method of application include a method of applying with hands wearing protective gloves, a method of using an applicator such as a comb and a brush, and the like.

From the viewpoint of enhancing the effect of bleaching and destaining, the method for treating hair preferably includes a third step of leaving the mixture applied to the hair. From the viewpoint of further enhancing the decoloring/destaining effect, the time for leaving is preferably 5 minutes or more and preferably 30 minutes or less.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples and comparative examples. The invention is not limited only to the following examples. In addition, the following Examples 1 and 11 are reference examples.

In Examples and Comparative Examples, the following ingredients were used to prepare the first and second agents.

[First Agent]
(Alkaline agent)
Potassium persulfate Ammonium persulfate Sodium persulfate Sodium silicate Sodium metasilicate (other ingredients)
Magnesium carbonate Sodium chloride Silicic anhydride

[Second agent]
(Tertiary amine type cationic surfactant)
Dimethylaminopropylamide stearate Diethylaminoethylamide stearate (Ingredients that do not correspond to tertiary amine cationic surfactants)
Stearyltrimethylammonium chloride: quaternary amine type cationic surfactant (oxidizing agent)
Hydrogen peroxide (water)
Purified water (other ingredients)
Cetanol polyoxyethylene cetyl ether 1: (manufactured by Aoki Oil Industry Co., Ltd., trade name “Brownon CH-305”)
Polyoxyethylene cetyl ether 2: (manufactured by CRODA INC, trade name "BRIJ C20-PA-(SG)")
Liquid paraffin: (manufactured by Sonneborn, trade name “CARNATION”)
Propylene glycol Glycerin Dipropylene glycol 1,3-butylene glycol Phosphoric acid

(Examples 1 to 13 and Comparative Examples 1 to 7)
Preparation of first and second parts:
The ingredients shown in Tables 1 to 3 below were blended (in units of % by mass) to prepare a first agent and a second agent. The compounding amounts in the table (the compounding amount in 100% by mass of the first agent and the compounding amount in 100% by mass of the second agent) are indicated by the pure compounding amount (unit: mass%).

All of the first agents obtained in Examples 1 to 13 and Comparative Examples 1 to 7 were powdery.

Preparation of admixture:
In the combination of the first agent and the second agent shown in Tables 1 to 3 below, 2 parts by mass of the obtained second agent is mixed with 1 part by mass of the obtained first agent, and a special stirring is performed. A stick was used to stir the first part and the second part until they were completely mixed to obtain a mixture. The resulting mixed agent also corresponds to the liquid X described above.

(evaluation)
The obtained first agent, second agent and mixed agent were evaluated as follows. The evaluation results are shown in Tables 1-3.

(Test Example 1: Viscosity)
The viscosities at 25° C. of the obtained second agent and mixed agent were measured. Also, the ratio (viscosity of the mixture at 25°C/viscosity of the second agent at 25°C) was calculated from the measured viscosities of the second agent and the viscosity of the mixture.

The viscosity was measured using a TV-25 type viscometer (manufactured by Toki Sangyo Co., Ltd.). Measurement was performed using 4 rotors at a rotation speed of 12 rpm and a rotation time of 1 minute. When the viscosity measured under these conditions was 50000 mPa·s or less, the measured value was adopted as the viscosity at 25° C. of the second agent and the mixture. In addition, when the viscosity measured under these conditions exceeds 50,000 mPa s, measurement is performed again under the same conditions as above except that the rotation speed is changed to 6 rpm, and the obtained measured value is The viscosities at 25°C of the 2nd agent and the mixed agent were used.

(Test Example 2: Mixability)
20 g of the obtained first agent and 40 g of the obtained second agent were mixed and stirred for 30 seconds using a dedicated stirring rod. The mixed state after stirring was visually observed by three expert panels, and the evaluation results were determined through discussion.

<Evaluation Criteria for Mixability>
○○ (Very good): Completely mixed with no uneven parts ○ (Good): Almost completely mixed with almost no uneven parts △ (Fairly good): Uneven parts part remains × (defective): many uneven parts remain

(Test Example 3: Adhesion to hair)
After applying 10 g of the resulting mixture to a horizontally placed 10 cm flat tress (manufactured by Beaulux) using a special brush, the tress was placed vertically and observed for 3 minutes. Adhesiveness to hair was evaluated according to the following criteria.

<Evaluation Criteria for Adhesion to Hair>
○○ (fairly good): 3 minutes after application, the mixture does not drip from the hair and does not move on the hair ○ (good): 3 minutes after application, the mixture does not move downward on the hair by less than 2 cm. Moved △ (slightly good): 1 minute after application, the mixture moved downward on the hair by 2 cm or more and less than 10 cm, and 3 minutes after application, the mixture did not drip from the hair × ( Poor): The mixture drips from the hair 3 minutes after application

(Test Example 4: Decolorization power)
2 g of the resulting mixture was evenly applied to a 10 cm long black human hair tress ("Level 4 tress" manufactured by Beaulux) and left in an atmosphere at 30°C for 30 minutes. After that, the hair tress was washed with water and dried using a drier. The decolorization state was visually observed by three expert panels, and the evaluation results were determined through discussion.

<Evaluation criteria for bleaching power>
○ (Good): Clearly brighter than the hair bundle before bleaching △ (Slightly good): Slightly brighter than the hair bundle before bleaching × (Poor): Same brightness as the hair bundle before bleaching

The compositions of the first and second agents and the results are shown in Tables 1 to 3 below.

Claims (5)

a powdery first agent containing an alkaline agent;
At least a second agent containing an oxidizing agent and a tertiary amine cationic surfactant and having a viscosity at 25° C. of 11000 mPa s or less,
The tertiary amine cationic surfactant is at least one selected from the group consisting of stearic acid dimethylaminopropylamide, stearic acid diethylaminoethylamide, and stearyldimethylamine,
The content of the tertiary amine cationic surfactant in 100% by mass of the second agent is 1.5% by mass or more,
pH of the second agent is 1.0 or more and 4.5 or less,
The viscosity at 25° C. of a liquid obtained by mixing 2 parts by mass of the second agent with respect to 1 part by mass of the first agent is 18000 mPa·s or more,
The pH of the liquid obtained by mixing 2 parts by mass of the second agent with respect to 1 part by mass of the first agent is 6 or more and 11 or less,
In order to obtain a mixed agent in which a plurality of agents including the first agent and the second agent are mixed, 0.8 parts by mass or more and 8.0 parts by mass of the second agent per 1 part by mass of the first agent A hair bleaching and destaining agent that is used by mixing parts by mass or less . The method according to claim 1, wherein the plurality of agents are mixed and used so that the viscosity of the mixed agent obtained by mixing the plurality of agents including the first agent and the second agent is 18000 mPa s or more at 25 ° C. The described hair bleaching and destaining agent. a powdery first agent containing an alkaline agent;
At least a second agent containing an oxidizing agent and a tertiary amine cationic surfactant and having a viscosity at 25° C. of 11000 mPa s or less,
The tertiary amine cationic surfactant is at least one selected from the group consisting of stearic acid dimethylaminopropylamide, stearic acid diethylaminoethylamide, and stearyldimethylamine,
The content of the tertiary amine cationic surfactant in 100% by mass of the second agent is 1.5% by mass or more,
pH of the second agent is 1.0 or more and 4.5 or less,
A mixture obtained by mixing a plurality of agents including the first agent and the second agent has a viscosity at 25 ° C. of 18000 mPa s or more,
pH of the mixture is 6 or more and 11 or less,
Hair bleaching and destaining, which is used by mixing 0.8 parts by mass or more and 8.0 parts by mass or less of the second agent with respect to 1 part by mass of the first agent to obtain the mixed agent. agent. The hair bleaching/destaining agent according to any one of claims 1 to 3, wherein the alkaline agent contains a persulfate. At least a powdery first agent containing an alkaline agent and a second agent containing an oxidizing agent and a tertiary amine cationic surfactant and having a viscosity at 25° C. of 11000 mPa·s or less. A step of mixing a plurality of agents including the first agent and the second agent using a hair bleaching/destaining agent to obtain a mixture;
A step of applying the mixture to the hair,
The tertiary amine cationic surfactant is at least one selected from the group consisting of stearic acid dimethylaminopropylamide, stearic acid diethylaminoethylamide, and stearyldimethylamine,
The content of the tertiary amine cationic surfactant in 100% by mass of the second agent is 1.5% by mass or more,
pH of the second agent is 1.0 or more and 4.5 or less,
The viscosity of the mixture at 25° C. is 18000 mPa s or more,
pH of the mixture is 6 or more and 11 or less,
A method for treating hair, wherein 0.8 parts by mass or more and 8.0 parts by mass or less of the second agent is mixed with 1 part by mass of the first agent to obtain the mixed agent.