JP5490624B2 - Temporary hair dye - Google Patents

Description

  The present invention relates to a temporary hair dye for temporarily coloring hair by attaching a dye to the surface of the hair, and more specifically, having excellent water resistance and drying properties, low viscosity, and various color development properties. The present invention relates to a temporary hair dye that can be suitably used for a batting type hair dye applicator.

2. Description of the Related Art Conventionally, temporary hair dyes that temporarily color hair by attaching colorants such as dyes and pigments to the surface of the hair have been accepted and used by many consumers because of their ease.
Various pigments and dyes are used as the colorant for the temporary hair dye depending on the intended hue and application.

As a temporary hair dye using a pigment, for example, a hair temporary colorant composition containing an amine oxide group-containing resin having a weight average molecular weight of 5,000 to 1,000,000, a pigment, and a hydrophilic solvent (for example, see Patent Document 1) is known. ing.
However, temporary hair dyes using this pigment have disadvantages in that the pigment adheres to the clothes and towels that are the objects to be contacted, and the secondary adhesion that stains the skin and clothes due to the pigment flowing down with sweat or water. Since the specific gravity is large, precipitation and aggregation of the pigment occurs in the hair dye, the product stability may be reduced, and the coloring may become uneven. Further, the precipitation of the pigment is likely to occur. There exists a subject that it cannot use with the applicator which has a container.

On the other hand, as temporary hair dyes using dyes, for example, (A) direct dyes selected from nitro dyes, anthraquinone dyes, acid dyes, oil-soluble dyes, basic dyes and disperse dyes, and (B) amine oxide groups Temporary hair dyes containing a containing resin and (C) an aromatic ether compound having specific physical properties (for example, see Patent Document 2) are known.
However, this temporary hair dye has problems such as poor water resistance, color drop when wet with rain, and sweat. In Comparative Example 4 of Patent Document 2, 0.3% by mass of an acidic dye (black 401), 1% by mass of a betaine amphoteric polymer, 50% by mass of ethanol, 0.5% by mass of lactic acid, 0. Temporary hair dye containing 1% by mass and 48.1% by mass of purified water is disclosed, but the evaluation results indicate that it is inferior in dyeability, secondary adhesion, etc., and the intended temporary hair dyeing effect Is not preferable.

  On the other hand, at least one kind of water-soluble dye, 0.1 to 3% by weight, amphoteric alkali resin 0.01 to 2.4% by weight, hair dyeing assistant such as benzyl alcohol 2 to 20% by weight, and lower alcohol 20 A hair dye having a cumulative hair-dyeing property (for example, the present application), characterized in that it contains ˜80 mass%, the viscosity is adjusted to 2.6 to 15 mPa · s, and the pH is adjusted to 2 to 5. Human patent document 3), acid dyes 0.0001 to 0.2% by mass, alkanediols 0.01 to 10% by mass such as 1,2-octanediol, and an acid, and the pH is 1.5 to An acid hair dye composition of a type that does not wash away is characterized by being 4.5 (for example, see Patent Document 4).

However, since the hair dye of Patent Document 3 is intended to have cumulative hair dyeing properties by using a hair dyeing assistant (penetration assistant) such as benzyl alcohol, water resistance and drying properties are sacrificed. The object and technical idea of the present invention are different from those of the present invention.
In addition, the acidic hair dye composition described in Patent Document 4 described above has a low acid dye content of 0.0001 to 0.2% by mass in order to obtain an acidic hair dye composition that does not wash away. Even if there is an alkanediol penetrating aid, the hair is dyed, it is inferior in water resistance, and in addition to the temporary hair dye that does not use the penetrating aid of the present invention, it is inferior in hair dyeing property, In addition, the present invention is different from the present invention in its purpose and technical idea.

Japanese Patent Laying-Open No. 2005-75737 (Claims, Examples, etc.) Japanese Patent Laying-Open No. 2005-232021 (Claims, Examples, etc.) JP 2007-302677 A (Claims, Examples, etc.) JP 2009-191040 (Claims, Examples, etc.)

  The present invention is to solve this problem in view of the above-mentioned problems and the present state of the art, and since it does not contain a hair dyeing assistant such as benzyl alcohol or alkanediol, even if an acid dye is used as a colorant, cumulative dyeing is performed. Temporary hair dye that does not have hair properties, is excellent in water resistance and drying properties, has low viscosity and has various color development properties, and can be suitably used for a batting type hair dye applicator. An object is to provide a temporary hair dyeing method and a temporary hair dye applicator.

  The present inventor intends to solve this problem in view of the above-described conventional problems, and specifies at least an acid dye, a (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer, ethanol, and water. The content ratio of the acidic dye and the (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer is set to a specific value or less on a mass basis, and the pH and viscosity range are respectively set to a specific range in the measurement at 25 ° C. As a result, the present inventors have found that the above-mentioned temporary hair dye can be obtained, and have completed the present invention.

That is, the present invention resides in the following (1) to (4).
(1) At least (A) acidic dye 0.5-2.0 mass%, (B) (methacryloyloxyethyl carboxybetaine / alkyl methacrylate) copolymer 0.2-5.0 mass%, (C) 40 to 80% by mass of ethanol and (D) water, the content ratio of (A) acidic dye and (B) (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer [(A) / ( B)] is 0.5 or less on a mass basis, and has a pH of 4.0 to 7.0 and a viscosity of 10 mPa · s or less when measured at 25 ° C. Temporary hair dye.
(2) The temporary hair dye according to (1), further comprising an acid.
(3) A temporary hair dyeing method using the temporary hair dye described in any one of (1) or (2) above.
(4) A temporary hair dye applicator characterized by being filled with the hair dye according to any one of (1) or (2) above.

  According to the present invention, there is provided a temporary hair dye having excellent water resistance and drying property, low viscosity and various color development properties, a temporary hair dyeing method using this temporary hair dye, and a temporary hair dye applicator. Provided.

It is a longitudinal cross-sectional view of the side aspect of the temporary hair dye applicator which shows an example of embodiment of this invention. It is a longitudinal cross-sectional view of the front aspect of the temporary hair dye applicator of FIG. It is a longitudinal cross-sectional view of the side aspect of the temporary hair dye applicator which shows the other examples of embodiment of this invention. (A) is a perspective view of the applicator for hair of FIG. 3, (b) is a perspective view which shows the state which removed the cap body. It is a disassembled perspective view of the applicator for hair of FIG. It is a longitudinal cross-sectional view of the side aspect of the temporary hair dye applicator which shows the other examples of embodiment of this invention. (A) is the perspective view of the assembled temporary hair dye applicator of FIG. 6, (b) is the perspective view seen from the bottom part of the temporary hair dye applicator.

Hereinafter, embodiments of the present invention will be described in detail.
The temporary hair dye of the present invention comprises at least (A) an acid dye of 0.5 to 2.0% by mass and (B) (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer of 0.2 to 5.0% by mass. And (C) 40-80% by mass of ethanol and (D) water, and the content ratio of the (A) acidic dye to the (B) (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer [ (A) / (B)] is 0.5 or less on a mass basis, and the pH is 4.0 to 7.0 and the viscosity is 10 mPa · s or less in the measurement at 25 ° C. It is.

The acidic dye used as the component (A) for use in the present invention is not particularly limited as long as it is a water-soluble one that is usually used in hair dyes.
Specific examples of the acid dye include Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2 No., Red 201, Red 206, Red 227, Red 230, Red 231, Red 232, Orange 205, Orange 207, Yellow 202, Yellow 203, Green 201, Green 204, Green 205, Blue 202, Blue 203, Blue 205, Brown 201, Brown 201, Red 401, Red 502, Red 503, Red 504, Red 506, Orange 403, Yellow 402 No., Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Green No. 401, Green No. 402, Purple No. 401, Black No. 401, etc. (each alone or a mixture of two or more, Same And the like.
A purified aqueous acid dye prepared by using each of the acid dyes as an aqueous toner can also be used.

Content of these (A) components is 0.5-2.0 mass% (henceforth "%" only) with respect to temporary hair dye whole quantity.
When the content of the component (A) is less than 0.5%, the hair dyeing effect is not sufficiently exhibited. On the other hand, when the content exceeds 2.0%, the water resistance is deteriorated and precipitation tends to occur. It is not preferable.

The (B) component (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer used in the present invention is contained in order to improve water resistance and drying property.
The (methacryloyloxyethyl carboxybetaine / alkyl methacrylate) copolymer used is a copolymer of methacryloyloxyethyl carboxybetaine and alkyl methacrylate, and when this copolymer is dissolved in water, the pH of the system also dissolves on the acidic side, It is difficult to be influenced by the additive, and particularly has characteristics such that the polymer is hardly precipitated even when an electrolyte is added to the aqueous solution.
Examples of the (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer that can be used include commercially available RAM resins 1000, 2000, 3000, and 4000 (all of which are 30% ethanol solutions), (above, manufactured by Osaka Organic Chemical Industry Co., Ltd.), Yucaformer-SM, 202, 510 (above, manufactured by Mitsubishi Chemical Corporation) and the like can be mentioned.

Content of the said (B) component in this invention needs to be 0.2-6.0% with respect to temporary hair dye whole quantity in conversion of solid content.
When the content of the component (B) is less than 0.2%, the water resistance is weak, and when it exceeds 6.0%, the viscosity increases, which is not preferable.

In the present invention, the acidic dye as the component (A) and the (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer as the component (B) can be used within the above ranges of the contents. The content ratio of the component and the component (B) [(A) / (B)] needs to be 0.5 or less on a mass basis from the viewpoint of water resistance and room temperature / low temperature stability, It is desirable to set it as 0.03-0.5.
If the content ratio [(A) / (B)] exceeds 0.5 on a mass basis, the stability is deteriorated, or the sedimentation is likely to occur, or the water resistance is deteriorated. It is not preferable.

The ethanol component (C) used in the present invention is contained from the viewpoint of improving drying properties and solubility of acidic dyes.
The content of the component (C) needs to be 40 to 80% with respect to the total amount of the temporary hair dye.
If the ethanol content is less than 40%, the drying property is lowered. On the other hand, if it exceeds 80%, the hair dyeing effect is not sufficiently exhibited, which is not preferable.

The remainder of the temporary hair dye in the present invention is adjusted with water as component (D), for example, purified water, ion-exchanged water, pure water, ultrapure water, distilled water, etc. can be used. It is desirable to set it as 20 to 55% with respect to the total amount of temporary hair dye.
If the content of the component (D) is less than 20%, the hair dyeing effect is lowered, and if it exceeds 55%, the drying property is lowered, which is not preferable.

The pH (25 ° C.) of the temporary hair dye of the present invention needs to be adjusted to 4.0 to 7.0 from the viewpoint of highly achieving temporary hair dyeability, water resistance and stability, preferably From the point that the water resistance is further improved in the weakly acidic region without impairing the temporary hair dyeing property, it is desirable to be 4.0 to 6.5.
If the pH of this hair dye is less than 4.0, temporary hair dyeing properties may be impaired or skin irritation may occur. If the pH exceeds 7.0, water resistance and stability deteriorate. This is not preferable.
In the present invention, the pH can be adjusted by containing an acid in addition to the components (A) to (D), for example, lactic acid, formic acid, acetic acid, tartaric acid, malic acid, citric acid. In addition, an organic acid such as glycolic acid, an inorganic acid such as hydrochloric acid or a salt thereof, and in some cases an alkali can be used.

The viscosity of the temporary hair coloring material of the present invention is such that there is no dripping and easy application to the hair, particularly when used with a batting type applicator such as an occlusion body, From the viewpoint of applicability, in the viscosity measurement with an ELD viscometer at a temperature of 25 ° C., it is necessary that the viscosity be 10 mPa · s or less, preferably 1 to 10 mPa · s.
If the viscosity of the temporary hair dye exceeds 10 mPa · s, the coatability is inferior, resulting in inconvenience that it cannot be used with a batting type applicator.
In addition, in order to set it as the said viscosity value or less, said (A) component-(D) component etc. which are contained in a temporary hair dye range of said each content, and content of said (A) / (B) component It can prepare by combining suitably in the range of ratio.

  The temporary hair dye of the present invention can appropriately contain other optional components as long as the effects of the present invention and the stability of the system are not impaired. Examples include various surfactants, preservatives, antioxidants, anti-reduction agents, chelating agents, ultraviolet absorbers, viscosity modifiers, oily components, silicone derivatives, fragrances, animal and plant extracts, and known polymer components.

Temporary hair dye in the present invention, each component such as the above components (A) to (D) is mixed and dispersed in the above ranges of each content, for example, bead mill, homomixer, propeller mixer, disper, attritor, It is prepared by mixing and dispersing with a ball mill, a sand grinder or the like.
The temporary hair dye of the present invention configured as described above is excellent in temporary hair coloring (temporary coloring), and has excellent water resistance against sweat, rain, and the like due to a hot and humid period such as summer. It will be. Moreover, the temporary hair dye of this invention can be used suitably as a temporary hair dye for black hair, a temporary hair dye for white hair, etc.

  In using the temporary hair dye of the present invention configured as described above, a temporary hair dye applicator is used, but the shape, structure, etc. of the temporary hair dye applicator to be used are not particularly limited. However, it is preferable that the temporary coating of the present invention is applied to the inside from the viewpoint of application to hair, controllability of the amount of liquid contained in the application site, occurrence of fouling of clothes, skin, furniture, etc., and usability. An applicator main body having a filling (occlusion body) for storing hair dye, and an applicator such as a brush body, a pen body, and a comb body provided at the tip of the applicator main body; A temporary hair dye applicator for applying the temporary hair dye to the hair by allowing the temporary hair dye of the present invention to flow out by capillary action or the like to the application part at the tip of the occluded filling.

For example, FIG. 1 is an applicator A showing an example of an embodiment of a temporary hair dye applicator using the temporary hair dye of the present invention.
As shown in FIG. 1 and FIG. 2, the applicator A includes a hair dye reservoir 30a having a storage body 31 in which the temporary hair dye of the present invention having the above-described configuration is occluded in a shaft body 30 constituting the applicator main body. The core body 32 that is housed in the core and is in the form of a comb for application having a capillary action is fixed to the distal end portion of the shaft body 30 in a linear row arrangement, and the rear end portion of the core body 32 is the occlusion body 31. To the front end of the shaft body 30, the comb portion 33 is provided on the side portion of the core body 32, and the cap body 40 is screwed to the front end portion of the shaft body 30. A cap body 40 is provided with a middle cap 43 which is made removable by attaching a core tip receiving member 41 such as a felt to which the tip portion of the core body 32 comes into contact and which has a concave portion 42 for accommodating the tip portion of the comb portion 33 on its side portion. It can be moved in the axial direction and can be rotated in the circumferential direction. Te, in which the middle cap 43 was energized by the spring member 44 toward the opening of the cap body 40.

  In the temporary hair dye applicator A having such a configuration, the necessary dyeing from the occlusion body 31 in which the temporary hair dye having the above-described configuration of the present invention is occluded to the storage portion 30a to the tip of the core body 32 serving as the application portion. Temporary hair dye applicator that is excellent in usability, water resistance, and temporary hair dyeing, while not only causing dripping and unintentional liquid discharge while supplying hair, can do.

3-5 is the applicator B which shows the other example of embodiment of the temporary hair dye applicator using the temporary hair dye of this invention.
This temporary hair dye applicator B is a modification of the temporary hair dye applicator A shown in FIGS. 1 and 2, and as shown in FIGS. 3 to 5, the inside of the shaft body 50 constituting the applicator main body. The occlusion body 51 that occludes the temporary hair dye of the present invention having the above-described configuration is accommodated in the hair dye storage section 50a, and the core bodies 52 that form a comb for coating having a plurality of capillary actions are arranged in a linear row. The shaft body 50 is detachably fixed to the front end portion of the shaft body 50, the rear end portion of the core body 52 is connected to the occlusion body 51, and the front end portion of the core body 52 is projected forward of the shaft body 50. A comb portion 53 is detachably provided on the side portion of the shaft body. A cap main body 54 is detachably attached to the tip portion of the shaft body 50 by screwing, and the tip portion of the comb portion 53 is accommodated on the side portion of the core body 52. The cap 55 is arranged in the cap body 54 so as to be movable in the axial direction and rotatable in the circumferential direction, The cap 55 is obtained by an urging state to the opening direction of the cap body 54 by the spring member 56. In addition, 57 is an outer cylinder member arrange | positioned between the cap main body 54 and the intermediate | middle cap 55, 58 and 59 are an intermediate | middle cover member and a back cover member which stop the rear-end part of the axial body 50, respectively.

  In the temporary hair dye applicator B having such a configuration, the necessary dyeing is performed from the occlusion body 51 in which the temporary hair dye having the above-described configuration of the present invention is occluded to the storage portion 50a to the tip of the core body 52 serving as the application portion. While supplying hair, it does not cause "sagging" or unintentional discharge of liquid, and is excellent in carrying and handling properties, as well as in usability, water resistance and temporary hair dyeing properties, and in a comb form. Since the core body 52 and the comb part 53 can be provided detachably, it can be set as the temporary hair dye applicator which becomes easy to assemble.

6-7 is the applicator C for hair which shows the other examples of embodiment of the temporary hair dye applicator using the temporary hair dye of this invention.
As shown in FIGS. 6 and 7, the hair applicator C includes a pedestal body 60 serving as an operation unit of the applicator, a receiving plate portion 61 a attached to the upper surface 60 a of the pedestal body 60, and a spring member. A receiving member 61 having an elastic member 61b, a receiving plate member 62, a hair dye container 63, and an occlusion body 64 storing the temporary hair dye of the present invention housed in the hair dye container 63; A comb body 65 having comb portions 65a, 65a... On the periphery, a lid member 66, and a hair dye container 63 containing a storage body 64 storing temporary hair dye in the comb body 65. is there.
In the temporary hair dye applicator C having such a configuration, the occlusion body 64 serving as an application body that occludes the temporary hair dye having the above-described configuration of the present invention is provided inside the peripheral comb portion 65a. And a hair applicator that can be easily and reliably dyed hair, and has excellent carrying and handling properties, as well as excellent usability, water resistance, and temporary hair dyeing properties, and a comb body 65 and a comb-like shape. Since the occlusion body 64 can be detachably provided, it is possible to provide a temporary hair dye applicator that facilitates assembly.

  In the temporary hair dye of this invention comprised in this way, at least 0.5-2.0 mass% of acidic dyes of (A) component, and (B) component (methacryloyloxyethyl carboxybetaine / alkyl methacrylate) Containing 0.2 to 5.0% by mass of copolymer, 40 to 80% by mass of ethanol as component (C), and water as component (D), and the content ratio of component (A) and component (B) [ (A) / (B)] is 0.5 or less on a mass basis, and in the measurement at 25 ° C., the pH is 4.0 to 7.0 and the viscosity is 10 mPa · s or less. It is possible to obtain a temporary hair dye having excellent properties and drying properties, low viscosity, and various color development properties. Further, the temporary hair dye of the present invention does not use conventional hair dyeing assistants (penetration assistants) such as benzyl alcohol and alkanediol, so there is no cumulative hair dyeing property and the temporary hair dye that can be washed off with shampoo or the like. It will be.

The temporary hair dye applicator of the present invention is excellent in water resistance and drying properties, and is filled with a temporary hair dye having a low viscosity and various color development properties. A temporary hair dye applicator having excellent flowability and applicability can be obtained.
Moreover, since the temporary hair dyeing method of the present invention uses the temporary hair dye having the above characteristics, it is useful as a temporary hair dyeing method for black hair, a temporary hair dyeing method for white hair, and the like. A hair dyeing method is obtained.

  EXAMPLES Next, although an Example and a comparative example demonstrate this invention further in full detail, this invention is not restrict | limited by the following Example etc.

[Examples 1 to 10 and Comparative Examples 1 to 12]
Each temporary hair dye was obtained by uniformly stirring and mixing with a general-purpose propeller mixer with the composition shown in Table 1 below.
About each temporary hair dye of Examples 1-10 obtained above and Comparative Examples 1-12, while measuring the pH and viscosity of a temporary hair dye by the following method, the state of the temporary hair dye by the following evaluation method, Colorability (hair dyeability), water resistance, color residue, coating performance, low-temperature stability, drying property, irritation, and comprehensive evaluation were evaluated.
These results are shown in Table 1 below.

(Measurement method of pH)
The pH (25 ° C.) was measured with a pH meter F14 manufactured by Horiba.
(Viscosity evaluation method)
Each viscosity at 25 ° C. was measured with an ELD viscometer (TV-30, manufactured by Tokimec, 50 rpm).

(Evaluation method for the condition of temporary hair dye)
About each obtained temporary hair dye, the presence or absence of the sediment was confirmed by visual observation, and the state of the temporary hair dye was evaluated by the following evaluation criteria.
Evaluation criteria:
○: There is no sediment.
Δ: Only a slight amount of sediment is observed.
X: A sediment is clearly confirmed.

(Evaluation method of colorability)
A sample liquid of 0.2 g was applied to a 10 cm, 1.0 g white hair bundle of human hair with a brush, visually observed after natural drying, and the colorability was evaluated according to the following evaluation criteria.
Evaluation criteria:
A: Colored to the same or better color after using commercially available hair nail polish.
○: Colored almost the same as after using commercially available hair nail polish.
Δ: Not colored after using commercially available hair nail polish, but colored.
X: Little or no coloring.

(Water resistance evaluation method)
After applying 0.2g of temporary hair dye to a human hair bundle of 10cm and 1g with a brush, after naturally drying for 30 minutes, water was directly applied to the dried hair bundle, and how much color was transferred to the washing solution Evaluation was based on the evaluation criteria.
Evaluation criteria:
○: No color transfer △: Slight color transfer ×: Clear color transfer

(Evaluation method for color residue)
The sample liquid 0.2g was applied to a human hair gray hair bundle of 10 cm and 1.0 g with a brush, naturally dried, washed with shampoo, then visually observed, and the color residue was evaluated according to the following evaluation criteria.
Evaluation criteria:
(Double-circle): A difference cannot be confirmed even if it compares with the untreated gray hair bundle side by side.
○: A slight difference can be confirmed by comparing side by side with an untreated gray hair bundle.
Δ: Slight color remains in the hair bundle.
X: The color clearly remains in the hair bundle.

(Evaluation method of coating performance)
Using the applicator having the following configuration shown in FIGS. 1 and 2, the application performance was evaluated according to the following evaluation criteria.
Applicator configuration:
Core: Fiber bundle core, polyester Comb: Polypropylene molding Container body (shaft): Polypropylene Occlusion body: Polyester fiber (3 denier), polyethylene outer skin Evaluation criteria:
A: 10 out of 10 people answered that it was easy to use.
○: Seven to nine out of ten responded that it was easy to use.
Δ: 4 to 6 out of 10 responded that it was easy to use.
×: 3 or less of 10 people answered that it was easy to use.

(Evaluation method for low temperature stability)
20 g of each obtained temporary hair dye was filled in a glass bottle with a lid, and allowed to stand at −10 ° C. for 1 month, and then the low temperature stability was evaluated according to the following evaluation criteria.
Evaluation criteria:
○: There is no sediment.
(Triangle | delta): Very slight sediment is confirmed.
X: A sediment is clearly confirmed.

(Drying evaluation method)
After applying 0.2 g of the hair coloring material to a human hair bundle of 10 cm and 1 g with a brush, the time during which it did not get wet even when touched by hand was measured and evaluated according to the following evaluation criteria.
Evaluation criteria:
A: The liquid no longer adhered to the hand even after touching after 2 minutes.
○: The liquid did not adhere to the hand even after touching after 3 minutes.
(Triangle | delta): The liquid did not adhere to the hand even if it touched after 5 minutes passed.
X: The liquid adhered to the hand even after 5 minutes had passed.

(Irritation evaluation method)
The irritation when 10 testers (adult girls) actually used hair on the hair using the applicator containing each temporary hair dye shown in FIG. 1 was evaluated according to the following evaluation criteria.
Evaluation criteria:
◎: 0 people who felt stimulation ○: 1 people who felt stimulation △: 2 people who felt stimulation ×: 3 or more people who felt stimulation

(Evaluation method for comprehensive evaluation)
The evaluation was made according to the following evaluation criteria in consideration of 8 evaluations of the state of the above-mentioned temporary hair coloring, coloring property (hair coloring property), water resistance, color residue, coating performance, low temperature stability, drying property, and irritation.
Evaluation criteria:
◎: Eight evaluations are three or more, and all evaluations are ◯ or more. ○: Eight evaluations are in progress. ◎ is one and more. The total of ◯ and ◎ is seven or more. △: Eight evaluations are six or more. : 8 under evaluation 5 is less than or equal to 1 or more regardless of the number of ○

* 1 to * 3 in Table 1 are as follows.
* 1: Osaka Organic Chemical Industry Co., Ltd. (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer * 2: Mitsubishi Chemical Co., Ltd. (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer * 3: Musashino Chemical Co., Ltd. Lactic acid (concentration 90%)

As is clear from the results of Table 1 above, Examples 1 to 10 of the present invention are compared with Comparative Examples 1 to 12 that are outside the scope of the present invention, the state of the temporary hair dye, colorability (hair dyeing property), It was found to be a temporary hair dye that is excellent in water resistance, coating performance, low-temperature stability, drying properties, irritation, no color residue, and comprehensively excellent.
Looking at the comparative examples individually, Comparative Examples 1, 2, and 5 are those in which the pH of the temporary hair dye is outside the scope of the present invention, and Comparative Examples 3, 8, 9 and 11 are acid dyes and (methacryloyloxyethyl). The content ratio of the carboxybetaine / alkyl methacrylate copolymer is outside the scope of the present invention, Comparative Examples 4 and 10 are those in which the content of the acid dye is outside the scope of the present invention, and Comparative Example 6 is ethanol. Comparative Example 7 is a case where the content of ethanol is low, and Comparative Example 12 corresponds to Example 2 of Patent Document 3 (Japanese Patent Laid-Open No. 2007-302677) described above. In this case, it was found that the effect of the present invention cannot be exhibited. In Comparative Examples 3, 5, 6, and 8 to 10, precipitates were confirmed (evaluation: x), and subsequent evaluations such as colorability were omitted.

  It can be suitably used as a temporary hair dye for black hair, a temporary hair dye for white hair, and the like.

A Temporary hair dye applicator 30 Shaft body 30a Hair dye storage part 31 Occlusion body for storing temporary hair dye 32 Core body 33 Comb part

Claims (4)

  At least (A) acid dye 0.5-2.0 mass%, (B) (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer 0.2-6.0 mass%, and (C) ethanol 40- 80% by mass and (D) water, the content ratio of the (A) acid dye and the (B) (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer [(A) / (B)] Is a temporary hair dye characterized by having a pH of 4.0 to 7.0 and a viscosity of 10 mPa · s or less in a measurement at 25 ° C.   The temporary hair dye according to claim 1, further comprising an acid.   The temporary hair dyeing method using the temporary hair dye of any one of Claim 1 or 2.   A temporary hair dye applicator characterized by being filled with the hair dye according to claim 1.

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