JP2010150210A - Two-liquid type hair cosmetic which can be manufactured without heating, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-liquid type hair cosmetic in which liquid dripping is prevented at the time of use, excellent hair decoloring or hair dyeing benefit without carrying out over defatting hair is demonstrated, and which can be easily manufactured with low energy in a short time concerning the two-liquid type hair cosmetic for decoloring or dyeing hair, and to provide a method of manufacturing the same. <P>SOLUTION: The two-liquid type hair cosmetic includes: (1) a first liquid containing 0.05-3.0 wt.% of a cationic polymer and an alkali agent; (2) a second liquid containing an alkyl acrylate copolymer emulsion and an oxidizing agent in which the second liquid includes 3-13 wt.% of the alkyl acrylate copolymer emulsion as wt.% of the alkyl acrylate copolymer based on the whole weight of the second liquid. The method of manufacturing the same is disclosed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a two-component hair cosmetic for decolorizing or dyeing hair, which does not drip at the time of use, exhibits an excellent decoloring or hair coloring effect without excessive degreasing, and is simple in a short time The present invention relates to a two-component hair cosmetic that can be produced with low energy and a method for producing the same.

  The hair cosmetics that are currently widely used are composed of a first liquid and a second liquid that are stored separately, and are used in such a form that they are mixed and used immediately before use. As such a hair cosmetic, a two-component hair bleaching agent or a two-component hair dye containing an alkaline agent as an essential component in a first liquid and an oxidizing agent as an essential component in a second liquid is known.

  Conventionally, this type of two-component hair cosmetic has been designed to be a relatively low-viscosity liquid for easy mixing, but it is applied to the hair during decolorization or hair dyeing. It is necessary to increase the viscosity so as to have a predetermined viscosity in order to prevent liquid dripping after application.

  In order to adjust a two-component hair cosmetic composition having a predetermined viscosity, a mechanism of gelation by adding a certain amount or more of water to a surfactant has been conventionally employed (Patent Document 1). However, under such a prescription, it is necessary to add a considerable amount of a surfactant, which causes excessive degreasing of the hair, and as a result, there is a problem that the hair hurts and becomes dry.

  In recent years, a two-component hair cosmetic using a non-aerosol-type former container for discharging a liquid mixture of the first liquid and the second liquid in the form of foam is also known. In order to eliminate sagging, it is necessary to add a considerable amount of surfactant, and the problem of excessive degreasing has not been solved (Patent Documents 2 and 3).

  In order to solve such a problem and protect hair from excessive degreasing, a method of blending a hair protecting agent such as a liquid oil agent or an amino acid has been adopted, but it has not yet been essentially solved.

  There is also known a two-component hair cosmetic that employs a method in which a mixed liquid of a first liquid and a second liquid is discharged in the form of foam using an aerosol-type container (Patent Document 4). However, in order to improve foaming properties and eliminate dripping, it is necessary to add a considerable amount of surfactant, and the problem of excessive degreasing has not been solved, and uneven bleaching and hair dyeing are likely to occur. In addition, there are problems that metal pressure-resistant containers and the like are oxidized and corroded by an oxidant, and the internal pressure of the pressure-resistant container excessively increases due to decomposition of the oxidant.

  Furthermore, in consideration of the recent global warming problem, when manufacturing two-component hair cosmetics, it is possible to reduce the carbon dioxide emissions as much as possible and to adopt a non-heating manufacturing method so that it can be manufactured with low energy However, these two-component hair cosmetics also have a problem that they require heating when they are produced.

  The non-heated manufacturing method is one of the methods to reduce carbon dioxide emissions, and there were hair cosmetics that could be manufactured by the non-heating manufacturing method, but the decolorization and hair dyeing effects were poor, the feel of the finish was poor, and the treatment was There are many problems to be solved, such as the need for a special applicator (Patent Documents 2 and 3). Moreover, the problem of excessive degreasing due to the incorporation of a considerable amount of surfactant still remains in these two-component hair cosmetics produced by the non-heating method.

Although various studies have been made to propose to solve such problems, they have not yet been solved.
JP 2000-290150 A JP 2006-124274 A JP 2007-314524 A JP 2002-284655 A

  The present invention relates to a two-component hair cosmetic for decolorizing or dyeing hair, and does not sag at the time of use, exhibits an excellent decoloring or hair coloring effect without excessive degreasing, and is inexpensive and simple. Another object of the present invention is to provide a two-component hair cosmetic that can be produced with low energy and a method for producing the same.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that in a two-component hair cosmetic comprising a first liquid containing an alkaline agent and a second liquid containing an oxidizing agent, By blending a cationic polymer that protects hair in one liquid, and further blending an alkyl acrylate copolymer that gives the viscosity of the liquid mixture in the second liquid in the form of an emulsion, the liquid does not sag at the time of use. The present inventors have found that it is possible to provide a two-component hair cosmetic that exhibits an excellent decoloring or hair dyeing effect without excessively degreasing hair, and that can be produced inexpensively and easily with low energy, and a method for producing the same. The present invention has been completed as a result of further studies based on the above findings, and is described below.

Item 1.
(1) a first liquid containing 0.05 to 3.0% by weight of a cationic polymer and an alkali agent, and (2) a second liquid containing an alkyl acrylate copolymer emulsion and an oxidizing agent, A two-component hair cosmetic comprising a second liquid containing 3 to 13% by weight of an alkyl acrylate copolymer emulsion as a weight% of the alkyl acrylate copolymer based on the total weight of the second liquid.

Item 2.
Item 2. The two-component hair cosmetic according to Item 1, wherein the viscosity of the mixed solution of the first liquid and the second liquid at 25 ° C. is 1500 to 12000 mPa · S.

Item 3.
(1) A step of preparing a first liquid by dissolving and mixing a cationic polymer and an alkaline agent in water, and (2) dissolving and mixing the alkyl acrylate copolymer emulsion and the oxidizing agent in water. A step of preparing the second liquid by
A method for producing a two-component hair cosmetic comprising:

Item 4.
Item 4. The method for producing a two-component hair cosmetic according to Item 3, wherein at least one of the (1) first liquid preparation step and the (2) second liquid preparation step is performed without heating.

Item 5.
In the above step (1), further from water sequestering agent, dye, pigment, pH adjusting agent, hair protecting agent, flavoring agent, solubilizer, polymer compound, ultraviolet absorber, stabilizer, penetrating agent and wetting agent. Item 5. The method according to Item 3 or 4, wherein at least one selected from the group consisting of is dissolved and mixed.

  Item 6. In the step (2), at least one selected from the group consisting of a pH adjusting agent, a hair protecting agent, a flavoring agent, a pigment, an ultraviolet absorber, a stabilizer, a penetrating agent, and a wetting agent is further dissolved in water. Item 6. The method according to any one of Items 3 to 5, which is mixed.

  According to the present invention, by mixing the alkyl acrylate copolymer emulsion with the second liquid, when mixed with the first liquid, the alkyl acrylate copolymer is contained in a part of the alkali agent of the first liquid. It is summed to give a moderate viscosity to the mixture. Thereby, dripping at the time of use can be prevented. In addition, by blending the cationic polymer with the first liquid, it is possible to prevent hair damage due to tangling or friction of the hair during rinsing and shampooing after treatment.

  In addition, since the amount of the surfactant to be blended can be reduced, unlike conventional two-component hair cosmetics, it can eliminate excessive degreasing of the hair and the accompanying hair damage and dryness. It is good and the gloss is not impaired. Moreover, since the formulation contains a large amount of water as a carrier when the alkaline agent, the oxidizing agent and the dye act on the hair, the decolorization and hair dyeing effects are also excellent.

  Furthermore, the two-component hair cosmetic composition of the present invention can be manufactured without heating at a low cost in a short time.

  Hereinafter, the structure of the two-component hair cosmetic composition of the present invention will be described in detail.

I. Two-component hair cosmetic
(1) a first liquid containing 0.05 to 3.0% by weight of a cationic polymer and an alkali agent, and (2) a second liquid containing an alkyl acrylate copolymer emulsion and an oxidizing agent, Provided is a two-component hair cosmetic comprising a second liquid containing 3 to 13% by weight of an alkyl acrylate copolymer emulsion as a weight% of the alkyl acrylate copolymer based on the total weight of the second liquid.

  In the present invention, the two-component hair cosmetic includes a two-component decoloring agent and a two-component hair dye.

I-1. First liquid The first liquid contains (A) a cationic polymer and (B) an alkali agent. The form of the first liquid is mainly liquid, but may be in the form of powder, emulsion, gel, etc., as long as an appropriate viscosity can be obtained upon mixing with the second liquid.

(A) Cationic polymer In the present invention, the cationic polymer indicates a polymer having a site dissociating into a cation, and includes an amphoteric polymer which becomes a cation as a whole. Examples of such a cationic polymer include those in an aqueous solution containing an amino group or an ammonium group in the polymer side chain, or containing a diallyl quaternary ammonium salt as a constituent unit.

  More specifically, O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride, O- [2-hydroxy-3- (trimethylammonio) propyl] guar gum chloride, dimethyldiallylammonium chloride, Examples include acrylamide copolymer liquid, dimethyldiallylammonium chloride / acrylic acid copolymer liquid, vinylpyrrolidone / N, N-dimethylaminoethyl methacrylic acid copolymerized diethyl sulfate liquid, and the like. Of these, O- [2-hydroxy-3 (trimethylammonio) propyl] hydroxyethylcellulose chloride is considered in consideration of hair entanglement during rinsing and shampooing, hair damage suppression, and finished hair feel. O- [2-hydroxy-3 (trimethylammonio) propyl] guar gum chloride and dimethyldiallylammonium chloride / acrylic acid copolymer liquid are preferred, and O- [2-hydroxy-3 (trimethylammonio) propyl] guar gum chloride, A dimethyldiallylammonium chloride / acrylic acid copolymer liquid is more preferable, and O- [2-hydroxy-3 (trimethylammonio) propyl] guar gum chloride is most preferable. These cationic polymers are used singly or in combination of two or more.

  In the present invention, the blending amount of the cationic polymer can be appropriately set within the range where the effects of the present invention are exerted, but for example, 0.05 to 3% by weight, more preferably 0. It can be 2 to 2% by weight. It is preferable to adjust the blending amount of the cationic polymer in the first liquid to the above range because a higher feel improvement and hair damage suppressing effect can be obtained.

The cationic polymer is a known compound and can be produced by a known method.
In the present invention, a commercially available cationic polymer can also be used. Examples of commercially available cationic polymers include trade names: UCARE Polymer JR400 (Dow Chemical Japan) (O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride), Jaguar C-13S. (Rhodia Nikka) (O- [2-hydroxy-3- (trimethylammonio) propyl] guam gum chloride), Merquat 280 (Nalco Japan) (dimethyldiallylammonium chloride / acrylic acid copolymer liquid), Guffcut 440 (ISP Japan) (vinyl pyrrolidone / N, N-dimethylaminoethyl methacrylic acid copolymerized diethyl sulfate solution).

(B) Alkaline agent Examples of the alkali agent used in the present invention include ammonia compounds such as ammonia water, ammonium hydrogen carbonate and ammonium hydrogen phosphate, inorganic bases such as sodium hydrogen carbonate, sodium hydroxide and potassium hydroxide, Examples include ethanolamine, diethanolamine, triethanolamine, isopropanolamine, alkanolamines such as 2-amino-2-methyl-1-propanol, and organic amines such as arginine.

  In consideration of the viscosity, odor and decoloring effect at the time of use in the present invention, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol are preferable, monoethanolamine, 2-amino 2-Methyl-1-propanol is more preferred, and monoethanolamine is most preferred. These alkaline agents are used singly or in combination of two or more.

  In the present invention, the blending amount of the alkaline agent can be appropriately set within the range where the effects of the present invention are exerted, but in a preferred embodiment, for example, 2 to 2 based on the total weight of the first liquid of the two-component hair cosmetic. It can be 20% by weight, more preferably 2.5 to 18% by weight, more preferably 3 to 15% by weight, and still more preferably 3.5 to 12% by weight. By setting the blending amount of the alkaline agent and the salt thereof in the first liquid within the above range, a sufficient thickening effect and a decoloring / dyeing effect can be obtained, and damage to the hair can be suppressed.

  Alkaline agents and their salts are known compounds and can be produced by known methods. In the present invention, a commercially available alkaline agent can also be used. Examples of commercially available alkaline agents include trade names: monoethanolamine Care (BASF Japan), AMP Cosmetic Grade (Angus Chemical) (2-amino-2-methyl-1-propanol), and the like.

  In the first liquid of the two-component hair cosmetic composition of the present invention, a known metal sequestering agent, dye, pigment, pH adjuster, hair protecting agent, flavoring agent, propylene glycol, ethyl alcohol, isopropyl alcohol are used as necessary. A solubilizing agent such as a lower alcohol, a polymer compound, an ultraviolet absorber, a stabilizer, a penetrating agent, a wetting agent, and the like may be appropriately added to such an extent that the performance of the two-component hair cosmetic of the present invention is not impaired.

  Water is used as the solvent of the first liquid, and purified water is usually blended. In this case, the blending amount of water is the remainder when a predetermined amount of each component is blended, and the blending amount is preferably about 10 to 95% by weight with respect to the total weight of the first liquid. Therefore, when the first liquid contains any of the above-described various components in addition to the cationic polymer and (B) the alkali agent, the amount of water is preferably about 10 to 80% by weight. Of course, it is appropriately adjusted depending on the kind of component, the blending amount, and the like.

I-2. The second liquid second liquid contains (A) an alkyl acrylate copolymer emulsion and (B) an oxidizing agent. The form of the second liquid is mainly liquid, but may be in the form of powder, emulsion, gel, etc., as long as sufficient viscosity is obtained upon mixing with the second liquid.

(A) an alkyl acrylate copolymer emulsion contained in the alkyl acrylate copolymer emulsion second liquid is an emulsion containing alkyl acrylate copolymer as the base resin, it can be widely used commercially. In a preferred embodiment, the alkyl acrylate copolymer emulsion is typically 27 to 33 wt% alkyl acrylate copolymer, 66.5 to 72.5 wt% water, and 0.4 to 0.5 wt% surfactant. %.

  In the present invention, the alkyl acrylate copolymer means a copolymer containing alkyl acrylate as a constituent component of a monomer. Examples of the monomer constituting such a copolymer include alkyl methacrylate, acrylic acid, methacrylic acid, and the like, and those obtained by copolymerizing two or more types of monomers selected from the group consisting of these are included. .

  Here, examples of the alkyl acrylate constituting the alkyl acrylate copolymer include those having an alkyl group having 1 to 4 and 8 carbon atoms. Specifically, for example, methyl acrylate, ethyl acrylate, acrylic Examples thereof include propyl acid and butyl acrylate.

  Examples of the alkyl methacrylate constituting the alkyl acrylate copolymer include those having an alkyl group having 1 to 4 and 8 carbon atoms, such as methyl methacrylate, ethyl methacrylate, and methacrylic acid. And propyl and butyl methacrylate.

  Examples of commercially available alkyl acrylate copolymer emulsions include: Trade name: Aculin TM 33A (Rohm and Haas Japan, 28% pure emulsion), Rubiflex Soft (BASF Japan, 30% pure emulsion) ), Carbopol AQUA SF-1 POLYMER (Noveon, 30% pure emulsion). These alkyl acrylate copolymer emulsions are used singly or in combination of two or more.

  The blending amount of the alkyl acrylate copolymer emulsion is not particularly limited as long as it is neutralized with the alkali agent of the first liquid and the mixed liquid has an appropriate viscosity, but the alkyl acrylate copolymer emulsion is not limited. As the weight percent of the alkyl acrylate copolymer with respect to the total weight in the second liquid, it is preferable to blend about 3 to 13 weight percent, more preferably about 4 to 10 weight percent.

  In addition, it is not particularly limited as long as it is contained in the above range as the alkyl acrylate copolymer weight% in the second liquid, but the blending amount of the alkyl acrylate copolymer emulsion is based on the total weight in the second liquid, Preferably, about 10 to 40% by weight, more preferably about 12 to 30% by weight is blended.

(B) As the oxidant contained in the second oxidant liquid, known ones can be widely used. Specifically, examples of the oxidizing agent include substances that liberate oxygen by contact with hydrogen peroxide or water.

  More specifically, examples of the oxidizing agent include hydrogen peroxide, sodium perborate, potassium perborate, sodium percarbonate, and sodium bromate. Here, hydrogen peroxide is usually used as an aqueous solution of 10 to 35% by weight, and sodium perborate, potassium perborate, sodium percarbonate, sodium bromate, etc. are blended with these compounds as they are or in aqueous solution. It is mix | blended in the state of. The oxidizing agent used in the present invention is preferably hydrogen peroxide. You may use these oxidizing agents 1 type or in mixture of 2 or more types.

  The amount of the oxidizing agent is not particularly limited as long as it is an amount that generates sufficient oxygen for decoloring or dyeing, but the oxidizing agent is 0.01 to 40% by weight based on the total weight in the second agent. The amount is preferably about 0.1 to 30% by weight.

  In the second liquid, if necessary, optional components such as a known pH adjusting agent, hair protecting agent, flavoring agent, dye, ultraviolet absorber, stabilizer, penetrating agent, wetting agent, etc. You may add suitably in the range which does not impair.

  As the solvent of the second liquid, water is used, and usually purified water is blended. In this case, the blending amount of water is the balance when each component is blended in a predetermined amount, and the blending amount is preferably about 10 to 95% by weight with respect to the total weight of the second agent. In this case, the amount of water is naturally adjusted as appropriate depending on the types and amounts of various components to be blended in (A) the alkyl acrylate copolymer emulsion and (B) the oxidizing agent and further the second agent. Is done.

  In the two-component hair cosmetic composition of the present invention, the first solution and the second solution may be stored independently in separate plastic or aluminum containers. Alternatively, the first liquid and the second liquid may be stored independently in a space divided into two or a plurality of parts inside one plastic or aluminum container.

II. A method for producing a two-component hair cosmetic
(1) The step of preparing the first liquid by dissolving and mixing the cationic polymer and the alkaline agent in water, and (2) dissolving and mixing the alkyl acrylate copolymer emulsion and the oxidizing agent in water. A step of preparing the second liquid by
A method for producing a two-component hair cosmetic composition comprising

II-1. Step of preparing first liquid The first liquid can be produced by dissolving and mixing the above-mentioned (A) cationic polymer and (B) alkaline agent in water.

  The proportion of (A) the cationic polymer and (B) the alkali agent used may be in such a range that the concentration of each component in the obtained first liquid is within the above-described concentration range. The latter may be 2 to 120 parts by weight, more preferably 3 to 40 parts by weight with respect to parts by weight.

  In the method of the present invention, in the step of preparing the first liquid, the above-described known optional components such as a metal sequestering agent, a dye, a pigment, a pH adjusting agent, a hair protecting agent, a flavoring agent, and dissolution are further dissolved in water. A method of dissolving and mixing at least one component selected from the group consisting of an agent, a polymer compound, an ultraviolet absorber, a stabilizer, a penetrating agent, and a wetting agent is also included. In this case, the method of the present invention includes a method of blending the above-mentioned (A) cationic polymer, (B) alkaline agent and the above-mentioned optional component in water in any order, and a method of blending them simultaneously.

  The step of adding the above components to water and mixing can be performed under heating, but in the method of the present invention, it can also be performed under non-heating. The operation is preferably performed at 10 to 35 ° C, more preferably 20 to 25 ° C.

  In the present invention, the time required for the mixing step can be greatly shortened by setting the first liquid to the above-described composition. For example, a 1st liquid can be obtained by performing a mixing process normally for 5 to 29 minutes, Preferably about 5 to 9 minutes.

II-2. Step of preparing second liquid The second liquid can be produced by dissolving and mixing (A) the alkyl acrylate copolymer emulsion and (B) the oxidizing agent in water.

The use ratio of (A) alkyl acrylate copolymer emulsion and (B) oxidizing agent (in the case of hydrogen peroxide solution, in terms of the weight of H ₂ O ₂ contained in hydrogen peroxide solution) is as follows. The concentration of each component may be in a range that falls within the above-described concentration range, but preferably 0.15 to 0.6 parts by weight, more preferably 0.2 parts by weight with respect to 1 part by weight of the former. What is necessary is just to be 0.5 weight part.

  In the method of the present invention, in the step of preparing the second liquid, in addition to water, the above-mentioned known optional components such as a pH adjuster, a hair protecting agent, a flavoring agent, a dye, an ultraviolet absorber, a stabilizer, and a penetrating agent. A method of dissolving and mixing at least one selected from the group consisting of an agent and a wetting agent is also included. In this case, the method of the present invention includes a method of blending the above-mentioned (A) cationic polymer, (B) alkaline agent and the above-mentioned optional component in water in any order, and a method of blending them simultaneously.

  The step of adding the above components to water and mixing can be performed under heating, but in the method of the present invention, it can also be performed under non-heating. The operation is preferably performed at 10 to 35 ° C, more preferably 20 to 25 ° C.

  In the present invention, the time required for the mixing step can be greatly shortened by setting the second liquid to the above-described composition. For example, a 2nd liquid can be obtained by performing a mixing process normally for 5 to 29 minutes, Preferably about 5 to 9 minutes.

  The first liquid and the second liquid thus obtained can be used for hair dyeing by a known method, for example, by mixing the first liquid and the second liquid immediately before use.

III. Method of mixing and decoloring or dyeing two-component hair cosmetics The two-component hair cosmetic of the present invention is mixed with the first and second liquids and then decolored according to a conventional method, for example, by applying it to the hair. Or it can be dyed.

In preferable embodiment, the density | concentration of the liquid mixture obtained by mixing a 1st liquid and a 2nd liquid will be 1500-12000 mPa * S by the viscosity in 25 degreeC, Preferably it is 2000-10000 mPa * S. In this invention, a viscosity shows the viscosity measured by the method as described in " 3. Viscosity at 25 degrees C of a liquid mixture " in an Example of this application.

  In the two-component hair cosmetic composition of the present invention, the mixing ratio of the first liquid and the second liquid is not particularly limited as long as an appropriate viscosity is obtained when mixed, but the weight of the first liquid is 10 parts by weight. On the other hand, the second liquid is usually about 10 to 50 parts by weight, preferably about 10 to 30 parts by weight.

  The amount applied to the hair can be appropriately set as desired. However, the total amount of the first agent is about 50 to 90 g, the second agent is about 50 to 90 g, and preferably the first agent is about 30 cm in length. About 70 g and the second agent is about 70 g.

  The decolorization or hair dyeing time is appropriately selected depending on the coating amount, the type and amount of the alkali agent or dye, and the desired degree of decolorization or hair dyeing, but it is 5 minutes or more, preferably 5 to 50 minutes, more preferably 10 Examples are up to about 45 minutes and usually up to about 40 minutes.

  According to such a two-component hair cosmetic composition of the present invention, it does not drip at the time of use, exhibits an excellent decoloring or hair coloring effect without excessively degreasing hair, and is inexpensive and easily manufactured with low energy. It is possible to provide a two-component hair cosmetic that can be produced and a method for producing the same.

  The following two-component hair cosmetics of the present invention and effects thereof will be described using examples, but the present invention is not limited to these examples. In the following examples, the blending amount is shown in wt%.

Test Example The first liquid of each component and blending ratio shown in the following table was prepared by stirring and mixing without heating for Examples 1 to 15 and Comparative Examples 1 and 4 to 7. For Comparative Examples 2, 3, 6 and 7, the components other than the alkaline agent were mixed and dissolved by heating at 80 ° C., cooled with stirring, then mixed with the alkaline agent at around 45 ° C., and mixed. Until cooled. This obtained the 1st liquid.

  About the 2nd liquid, each component described in the following table | surface was stirred and mixed and adjusted to purified water at room temperature. This obtained the 2nd liquid.

  The obtained 1st liquid and 2nd liquid were mixed at room temperature just before use, it mixed thoroughly until there was no unevenness, and each item was evaluated by the evaluation method shown below.

1. The manufacturing process first solution was adjusted to 100g and the second liquid 100g, as described above, respectively, based on the manufacturing time of the person who took longer to manufacture of the first liquid and the second liquid, the evaluation by the following criteria went.
A: Only the non-heating step, and the time required for production is shorter than 10 minutes.
○: Only the non-heating process takes 10 minutes or more and less than 30 minutes.
Δ: Time required for production is 30 minutes or more only in the non-heating step.
X: Time required for production including the heating step is 30 minutes or more.
2. The usability here usability means whether the appropriate viscosity without dripping. Take 20 g of the first liquid and 40 g of the second liquid in the applicator for application, respectively, and mix well so that the first liquid and the second liquid are properly mixed. Thereafter, the mixed solution was applied to the wig, allowed to stand for 20 minutes, and evaluated for useability according to the following criteria. The application applicator used here is the most common type used in two-component hair cosmetics, and consists of a main body bottle containing the contents and a nozzle having one discharge part. ing.
(Double-circle): It can discharge smoothly from an applicator, and there is no dripping from immediately after application | coating to after leaving.
○: It is difficult to come out from the applicator, but there is no dripping from immediately after application to after standing.
(Triangle | delta): There is almost no dripping from immediately after application | coating to after leaving.
X: Liquid dripping occurs immediately after application and after standing.

3. Take 20 g of the first liquid and 40 g of the second liquid at 25 ° C. in a cylindrical glass sample tube each having a diameter of 35 mm and a height of 78 mm, close the lid, and mix the first and second liquids properly. Mix well. Then, after being immersed in a constant temperature phase at 25 ° C. for 30 minutes, the temperature is taken out from the constant temperature phase, and the viscosity at 25 ° C. is measured with a B-type viscometer (TVB-10M manufactured by Toki Sangyo Co., Ltd.) for 1 minute with a No. 4 rotor. Measured by rotation, the results are shown numerically.

4). Hand a first liquid 2g and the second liquid 4g were uniformly mixed to obtain a mixed solution 6 g. This mixed solution was applied to 4 g of black hair bundle (human hair). The feel of the hair bundle after standing at 30 ° C. for 20 minutes, washing with water, shampooing and conditioner, and drying with hot air was evaluated according to the following criteria. In addition, the shampoo and the conditioner used the commercial item.
A: There is no squeaky hair and a smooth touch.
○: The hair has almost no squeak and has a smooth touch.
(Triangle | delta): The touch which a hair is slightly squeaked and feels a little stiff.
×: The hair feels squeaky and stiff.

Comprehensive evaluation The two-component hair dye cosmetic needs to exhibit a high performance uniformly for the above four items, and even if the performance is inferior in any one item, it may cause a problem in commercialization. Therefore, if all of the above four items are 総 合, the overall evaluation is ◎, and if any one of the four items is ○, the overall evaluation is っ て も even if other items are ◎. Similarly, if at least one of the four items has Δ, the overall evaluation Δ, and if at least one of the four items has ×, the overall evaluation ×. In the above comprehensive evaluation, the viscosity items were evaluated as x when 1500 to 12000 mPa · S was given as “◎” and less than 1500 mPa · S and over 12000 mPa · S.
The compositions and evaluation results of the examples and comparative examples are shown in Tables 1 to 6 below.

  In each Example and Comparative Example, Carbopol AQUA SF-1 POLYMER (Noveon, 30% pure emulsion) was used as the alkyl acrylate copolymer emulsion. The emulsion contains 30% by weight of an alkyl acrylate copolymer.

  By comparing Examples 1 to 3 and Comparative Examples 1 to 4, a cationic polymer and an alkali agent are blended in the first liquid, and an alkyl acrylate copolymer emulsion and an oxidizing agent are blended in the second liquid, and the time is short. It was found that it is possible to provide a two-component decoloring agent that can be easily produced without heating and has excellent usability and finish.

  As in the case of the two-component decoloring agent, a comparison between Examples 4 to 6 and Comparative Examples 5 to 8 shows that the first solution contains a cationic polymer and an alkali agent, and the second solution contains an alkyl acrylate copolymer emulsion and oxidation. It was found that a two-component hair dye that can be easily produced without heating in a short time and that is excellent in usability and finishing touch can be provided by blending the agent.

  Since both the two-component decoloring agent and the two-component hair dye can achieve the same effect, only the test examples of the two-component hair dye will be illustrated in the following paragraphs.

  From the comparison between Examples 4 and 10-13 and Comparative Examples 9 and 10, the blending amount of the cationic polymer in the first liquid contained in the two-component hair dye is 0 with respect to the total amount of the first agent. It has been found that a desired effect can be sufficiently obtained even at 0.05 to 3% by weight, and a more preferable effect can be obtained at 0.2 to 2% by weight.

  From Examples 4 and 14 to 18 and Comparative Examples 11 and 12, the blending amount of the alkyl acrylate copolymer emulsion in the second liquid contained in the two-component hair dye is based on the total amount of the first agent. 10 to 40% by weight (alkyl acrylate copolymer content of 3 to 12% by weight) can sufficiently achieve the desired effect, and 12 to 30% by weight (alkyl acrylate copolymer content) It was found that a more preferable effect was obtained at 4 to 9% by weight).

  When an alkyl acrylate copolymer or an acrylic acid / alkyl methacrylate copolymer is used in place of the alkyl acrylate copolymer emulsion (Comparative Examples 13 and 14), both require a long time for production, and , Feeling of touch, or usability deteriorated remarkably. From these results, it was found that it is indispensable to blend the alkyl acrylate copolymer in the emulsion state with the two-component hair cosmetic.

  From Tables 1 to 5, the two-part hair cosmetics of the present invention (Examples 1 to 18) have a simpler manufacturing process than the two-part hair cosmetics described in Comparative Examples 1 to 14, and are used at the time of use. It was confirmed that the finish was good without dripping.

Claims (2)

(1) a first liquid containing 0.05 to 3.0% by weight of a cationic polymer and an alkali agent, and (2) a second liquid containing an alkyl acrylate copolymer emulsion and an oxidizing agent, A two-component hair cosmetic comprising a second liquid containing 3 to 13% by weight of an alkyl acrylate copolymer emulsion as a weight% of the alkyl acrylate copolymer based on the total weight of the second liquid. (1) A step of preparing a first liquid by dissolving and mixing a cationic polymer and an alkaline agent in water, and (2) dissolving and mixing the alkyl acrylate copolymer emulsion and the oxidizing agent in water. A step of preparing the second liquid by
A method for producing a two-component hair cosmetic comprising: