JPH07309730A - Hair dye - Google Patents

Abstract

PURPOSE:To obtain a hair dye capable of coating the surface of hair with particulate powder utilizing properties of strongly flocculating the particulate powder strongly dispersed in a solvent in removing the solvent by dispersing the particulate powder having a specific average primary particle diameter in the solvent. CONSTITUTION:This hair dye comprises particulate powder, dispersed in a solvent such as water or an alcohol and having an average primary particle diameter within the range of 5-100nm and utilizing the cohesive force of the powder among particles acting thereon in evaporating the solvent for the powder. The particulate powder used herein is preferably blended in an amount within the range of especially 80-100% based on the total powder weight blended in the hair dye. For example, titanium oxide, zinc oxide, gold, silver, platinum, Teflon (R), nylon, a silicone, a urethane or carbon black is used as the particulate powder and complex treated powder or surface treated powder thereof is preferred. Water, an alcohol, an isoparaffin, a cyclic silicone, petroleum ether, a linear hydrocarbon, ethers, isopropylene glycol, a fluorocarbon, etc., are used as the solvent.

Description

Detailed Description of the Invention

[0001]

The present invention relates to the cohesive force of fine powder particles,
The purpose is to coat fine particles of powder on the hair surface by utilizing the adhesive force. More specifically, it is possible to provide a hair dye having excellent hair dyeing properties by coating the surface of the hair with the fine particle powder by utilizing the property that the fine particle powder strongly dispersed in the solvent strongly aggregates when the solvent is removed. With the goal.

[0002]

2. Description of the Related Art Conventionally, as a dyeing method in a hair dye, a method of dyeing hair with a dye, a method of fixing colored powder to a hair with a resin, etc. have been used. Came.

When a dye is used, it takes a long time until it is dyed with a dosage form such as color rinse, and with a dosage form such as a permanent hair dye, it takes a lot of time to dye hair and may cause irritation. was there. Further, although the method of using a binder such as a resin allows easy hair dyeing, it has a problem of lacking durability.

As a result of intensive studies conducted by the present inventors in view of these problems, a strong cohesive force generated when the solvent is removed from fine particle powder having an average primary particle diameter of 5 to 100 nm strongly dispersed in the solvent. By utilizing the adhesive force, we succeeded in easily and durablely dyeing hair.

Further, in this method, since the hair is not chemically treated and only the physical adhesive force of the fine particle powder is used, there is an effect that hair damage can be minimized.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a fine particle powder having an average primary particle size of 5 to 100 nm dispersed in a solvent, the particles being effective when the solvent of the powder is evaporated. The present invention relates to a hair dye that utilizes the cohesive force between the hair.

The structure of the present invention will be described in detail below. The fine particle powder used in the present invention has an average primary particle diameter in the range of 5 to 100 nm. A powder having a particle size of less than 5 nm tends to be active and the dispersion state tends to be unstable, and a powder having a particle size of more than 100 nm may be unfavorable because the cohesive force as a fine particle powder is insufficient.

The fine particle powder used in the present invention is blended in the range of 50 to 100%, preferably 80 to 100%, based on the total weight of the powder blended in the hair dye. 50%
If the amount of powder is less than the above range, hair dyeing power may be insufficient. Also,
As the powder other than the fine particle powder, it is possible to mix one or more kinds of powder selected from organic dyes, dyes and carbon black.

The fine particle powder used in the present invention may be an inorganic substance or an organic substance. For example, titanium oxide, low-order titanium oxide, silicon carbide, zinc oxide, aluminum oxide, iron oxide, silicon oxide, cerium oxide, cobalt oxide, lithium cobalt titanate, aluminum cobalt oxide, zirconium oxide, gold, silver, platinum, Teflon. , Nylon, silicone, urethane, carbon black, and composite-treated powders thereof. Further, those subjected to surface treatment such as silicone treatment, fluorine compound treatment, silane coupling agent treatment, acylated lysine treatment, fatty acid treatment, metal soap treatment and the like can be mentioned. Among these, it is preferable that a surface treatment or a composite treatment is performed in order to improve safety.

Further, as an example of a method for producing fine particle powder,
Various methods such as a gas phase method, a liquid phase method and a plasma method can be mentioned, but any method may be used. Further, as a result of the difference in cohesive force between the fine particle powders depending on the production method, the secondary particle diameter often differs greatly, but in the present invention, if only the primary particle diameter falls within the specified range, the size of the secondary particle diameter Does not matter. Examples of the shape of the fine particle powder include a spherical shape, an irregular shape, and a needle shape. A spherical shape is preferable because a strong cohesive force is exerted, but any shape may be used. As the method for measuring the average primary particle diameter, the average particle diameter obtained by observation with a transmission electron microscope (TEM) is used.

In the present invention, it is necessary to crush the fine particle powder using a strong mechanical crushing force. The fine particle powder usually forms and stabilizes secondary agglomerates, and the cohesive force between the particles is significantly reduced as compared with the primary particles alone. It is necessary to break this secondary aggregate in order to give a stronger cohesive force when using the hair dye. As a method of mechanical crushing, a roller mill, a paint shaker, a bead mill,
A device such as a sand grinder or a dyno mill can be used, but it is necessary to use a device having a strong crushing force such as a crushing aid.

Examples of the solvent used in the present invention include water (purified water), lower alcohol, isoparaffin, cyclic silicone, petroleum ether, straight chain hydrocarbon, ethers, isoprene glycol, fluorocarbon, etc. And is not particularly limited as long as there is no safety problem.

In the present invention, in addition to the powder, an oil agent, a surfactant, an ultraviolet absorber, a viscous agent, a resin, a bactericide, an antiseptic agent, an antioxidant, a fragrance, and a pigment, which are conventionally used in cosmetics, are blended. Is possible.

The total amount of the oil agent and the ultraviolet absorber which can be blended in the present invention is 0.1 to 100 parts by weight of the hair dye.
It is preferably 25 parts by weight. If it is 25 parts by weight or more, the cohesive force of the fine particle powder may be hindered, and there may occur a problem that it is not dyed well.

Further, in the present invention, HLB among oil agents and surfactants having a surface active function for enhancing the hair dyeing effect is used.
It is preferable to use one or more compounds having a value of 6 or less.

Examples of oil agents are cetyl alcohol, isostearyl alcohol, lauryl alcohol,
Hexadecyl alcohol, higher alcohols such as octyldodecanol, isostearic acid, undecylenic acid, fatty acids such as oleic acid, glycerin, sorbitol, polyhydric alcohols such as ethylene glycol and propylene glycol, myristyl myristate, hexyl laurate,
Esters of decyl oleate, isopropyl myristate, hexyldecyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, liquid paraffin, petrolatum,
Hydrocarbons such as squalane, waxes such as lanolin, reduced lanolin and carnauba wax, and oils and fats such as mink oil, cocoa butter, coconut oil, palm kernel oil, camellia oil, sesame oil, castor oil, olive oil and the like can be mentioned.

Examples of other types of oil agents include, for example, dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane,
Fluorine-modified organopolysiloxane, amodimethicone, amino-modified organopolysiloxane, silicone gel, acrylic silicone, trimethylsiloxysilicic acid,
Examples thereof include silicone compounds such as fluorine / polyether co-modified silicone, and fluorine compounds such as perfluoropolyether, fluorinated pitch, fluorocarbon and fluoroalcohol. Of these, polyether-modified organopolysiloxane and fluorine-polyether co-modified silicone are suitable for ensuring the dispersion stability of the fine particle powder in the hair dye. Care must be taken because the cohesive strength of is weakened.

As the surface active agent, an anionic surface active agent, a cationic surface active agent, a nonionic surface active agent and a betaine surface active agent can be used.

As the sticking agent, agar, natural products such as microorganism-produced polysaccharides, synthetic products such as polycarboxylic acid, bentonite,
Inorganic substances such as organically modified smectite and silicic acid anhydride can be used.

Examples of the form of the hair dye of the present invention include solvent dispersion type, mousse type, gel type, cream type and color rinse type, but are not limited thereto. Further, the container form such as a tube, a pressure container, a bottle is not limited.

Further, when the hair dye of the present invention is used, if an oil agent or a resin is adhered to the hair, a thin film of fine particle powder is formed on the hair and the durability is lost. . Therefore, it is preferable to dye hair after washing the hair in advance.

[0022]

EXAMPLES The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited thereto.

The evaluation method of the hair dye used in the present invention is as follows.

(1) Evaluation of Warm Water Resistance The hair dyes of Examples and Comparative Examples were dyed using a bundle of Chinese hair. The obtained dyed hair was stirred with a stirrer 4
After being placed in hot water at 0 ° C. and left for 10 minutes, it was dried and the state of hair dyeing was visually confirmed. Then, the evaluation was performed according to the criteria shown in Table 1.

(2) Evaluation of shampoo resistance The hair dyes of Examples and Comparative Examples were dyed using a hair bundle of Chinese hair. The obtained dyed hair was stirred with a stirrer 4
The mixture was placed in 0 ° C. shampoo water (commercial shampoo, 2% by weight solution), allowed to stand for 10 minutes, dried, and the state of hair dyeing was visually confirmed. Then, the evaluation was performed according to the criteria shown in Table 1.

[0026]

[Table 1]

(3) Sensory Evaluation The hair dyes of Examples and Comparative Examples were tested using the white hair part of 5 panelists. Regarding the condition after 1 day, 1 week and 2 weeks after use, the results were totaled by the number of panelists who answered that they were well stained. The results show that, for example, if the number of responses is 5, all panelists evaluate that they are well stained.

Example 1 A hair dye was prepared according to the formulation shown in Table 2. Each fine particle powder used had been surface-treated with N-lauroyl-L-lysine in advance.

[0029]

[Table 2]

Each component was strongly dispersed using a paint shaker. A container was filled with the obtained dispersion liquid to obtain a product.

Comparative Example 1 A hair dye was prepared according to the formulation shown in Table 3. The black iron oxide used was surface-treated with N-lauroyl-L-lysine in advance.

[0032]

[Table 3]

Each component was strongly dispersed using a paint shaker. A container was filled with the obtained dispersion liquid to obtain a product.

Example 2 A hair dye was prepared according to the formulation shown in Table 4. It should be noted that the fine black iron oxide particles and red iron oxide fine particles are preliminarily N-lauroyl-L-
What was surface-treated with lysine was used.

[0035]

[Table 4]

Each component was strongly dispersed using a paint shaker. A container was filled with the obtained dispersion liquid to obtain a product.

Comparative Example 2 The same conditions as in Example 2 were used except that the dispersing method was propeller stirring.

Comparative Example 3 A commercially available two-component permanent dye was used as a comparative example.

COMPARATIVE EXAMPLE 4 A commercially available partially dyed hair dye was used as a comparative example.

The hot water resistance evaluation and the shampoo resistance evaluation were carried out for Examples 1-2 and Comparative Examples 1-4. The results are shown in Table 5.

[0041]

[Table 5]

From the results shown in Table 5, it can be seen that the examples of the present invention are superior in hot water resistance and shampoo resistance to the comparative examples. In Example 1 and Comparative Example 1, trial manufacture was performed using powders having different average primary particle diameters. It was observed that as the particle size increased, the cohesive force decreased and the particles tended to fall slightly. In addition, in Example 2 and Comparative Example 2, trial production was performed by changing the dispersion force largely. The dispersive power of the comparative example is very weak. In this case, the particles of the comparative example did not exert much cohesive force and easily fell off from the hair surface. Comparative Example 3 was dyed well because the hair was chemically treated. Comparative Example 4 was dyed well when the hair was dry, but washed off with shampoo and washed off.

The sensory evaluations of Examples 1 and 2 and Comparative Examples 1 to 4 were conducted. The results are shown in Table 6.

[0044]

[Table 6]

Table 5 shows the short-term results, while Table 6 shows the long-term test results. It can be seen that the examples of the present invention are superior in durability as compared with Comparative Examples 1, 2, and 4.
However, the durability as in Comparative Example 3 was not recognized. From this, it is understood that the hair dye of the present invention has a durability as high as that of the conventional dyeing, although it is not as durable as the conventional permanent dyeing with an oxidation dye or the like.

[0046]

EFFECTS OF THE INVENTION The hair dye of the present invention coats the surface of the hair with the fine particle powder by utilizing the property that the fine particle powder strongly dispersed in the solvent strongly aggregates when the solvent is removed.
It can easily and durablely dye hair.

Claims (2)

[Claims] 1. A hair dye, characterized in that fine particle powder having an average primary particle diameter in the range of 5 to 100 nm is dispersed in a solvent. 2. The fine powder is 5 weight of the total powder in the hair dye.
The hair dye according to claim 1, wherein the hair dye is mixed in the range of 0 to 100%.