JP2014097974A - Hair coloring agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair coloring agent which does not give use feeling, such as stickiness and roughness, to hair, while being excellent in color development at the time of use, and is also excellent in the persistence of the color development and moreover, ease of wash-out at the time of shampoo.SOLUTION: The hair coloring agent is mixed with the following components (a) to (c): (a) oil with a melting point of 55°C or more; (b) 10-30 mass % of isostearic acid; and (c) 25-55 mass % of an inorganic pigment.

Description

  The present invention relates to a hair colorant, and more specifically, a hair colorant containing oil having a melting point of 55 ° C. or higher, 10 to 30% by mass of isostearic acid, and 25 to 55% by mass of an inorganic color pigment, and coloring at the time of use. The present invention relates to a hair colorant that has excellent characteristics, but does not give a feeling of stickiness or wrinkle to the hair, has long-lasting color development properties, and is also excellent in ease of washing off during hair washing. .

  Conventionally, hair cosmetics are expected to have various effects and have been embodied by blending various components. Among them, hair colorants developed for the purpose of coloring hair are colored by simply attaching pigment components and oxidative hair dyes or permanent hair dyes that have a long hair dyeing effect, such as acidic hair dyes. There are temporary hair dyes (hair coloring agents). Permanent hair dyes have a long hair-dyeing effect, but have been difficult to work with. However, in recent years, techniques for easily dyeing gray hair at home have been spreading. However, as the hair grows after dyeing, an uncolored portion is generated only at the hairline, so there is a need for further hair coloring. In such a background, there is an increasing need for a gray hair concealment item for partial repair that can be partially used, such as temporarily making gray hair inconspicuous.

  Conventionally, as a technique for hair coloring, a technique for blending a specific polyhydric alcohol (for example, refer to Patent Document 1) and a resin component are blended in order to improve the adhesion of the pigment to the hair, color developability, and the like. There are a technique (for example, see Patent Document 2), a technique containing amino-modified polyether-modified silicon (for example, see Patent Document 3), a technique containing an organic polymer powder (for example, see Patent Document 4), and the like.

JP 2001-302470 A JP-A-1-213221 JP 2003-95898 A JP 2008-115124 A

  However, the technique of Patent Document 1 is a technique in which a specific polyhydric alcohol is an essential component, the technique of Patent Document 2 is a technique of blending a specific fixing resin, and the technique of Patent Document 3 is a resin. Since a solvent is required to dissolve the ingredients, after coloring the hair as a hair coloring agent, the adhesion to the hair may drop due to sweat, etc., or depending on the amount of fixing resin, a hard film may be formed. In other words, when the hair root part is relatively conspicuous, sticky, stiff, or bundled, there is a problem that it is difficult to obtain a smooth natural finish. These techniques have the disadvantage that water resistance becomes a problem due to the water-soluble components, and when the hair gets wet, it runs off and soils the scalp, face and clothes.

Furthermore, the technique using a resin such as a film-forming agent has a problem that it may be difficult to wash off after use. In the technology of Patent Document 3, a specific amino-modified polyether-modified silicon is blended, but the pigment has excellent dispersibility and water resistance. The technology of Patent Document 4 contains organic polymer powder. Although these techniques are related to oil-based hair colorants, these technologies have improved water resistance and are less susceptible to the effects of sweat, etc., but the hair can be washed away after achieving its purpose as a hair colorant. In some cases, it remained attached.
Therefore, in the present invention, it is excellent in usability (non-stickiness, non-stickiness), color development as a hair coloring agent and stability over time, but it is also colored in hair especially after washing. We aimed to develop something that does not leave a fee.

  In view of the above situation, as a result of earnest research, the present inventor is based on the knowledge that an oil agent having a specific melting point is necessary to apply and adhere an inorganic color pigment used as a colorant to the hairline. Initiated the development of hair colorants with pigments and oils with specific melting points. However, when the concentration of the inorganic coloring pigment is large, it is advantageous for coloring the hair, but the inorganic coloring pigment tends to remain on the hair when it is washed away after use, such as shampoo. Had the disadvantage of remaining. Therefore, as a result of further studies, the present inventors have conducted various studies as a component that contributes to the dispersibility of the inorganic coloring pigment in the oil component and dissolves in the oil agent having a specific melting point. It has been found that the above problems can be solved by using a hair colorant in which a specific amount of isostearic acid is blended with an oil having a specific melting point, and the present invention has been completed.

That is, the present invention provides the following components (a) to (c);
(A) Oil having a melting point of 55 ° C. or higher (b) 10 to 30% by mass of isostearic acid
(C) Inorganic color pigment 25-55 mass%
Is a hair coloring agent characterized by blending.

  The hair colorant of the present invention is excellent in color developability at the time of use, but does not give a feeling of use such as stickiness and stiffness to the hair, and it maintains the color developability and further facilitates washing off during hair washing. It is also useful for hair colorants having excellent characteristics.

  The component (a) used in the present invention is an oil having a melting point of 55 ° C. or higher, and is a component that contributes to adhering the component (c) inorganic coloring pigment described later to the hair. It can also be effective for non-stickiness and non-stickiness. Although it will not specifically limit if melting | fusing point is 55 degreeC or more, Preferably melting | fusing point is 60 degreeC or more, More preferably, it is 80 degreeC or more.

  The component (a) used in the present invention is not particularly limited as long as it can be used in cosmetics, and hydrocarbons, esters, waxes, fats and oils, higher alcohols and the like can be used. Specifically, solid paraffin wax, ceresin wax, microcrystalline wax, hydrogenated microcrystalline wax, carnauba wax, candelilla wax, candelilla wax hydrocarbons, candelilla wax esters, polyethylene wax, ethylene / propylene copolymer , Synthetic wax, Fischer-Tropsch wax, montan wax, beeswax, behenyl alcohol, (ethylene / propylene) copolymer and the like can be exemplified, and one or more of these can be appropriately selected and used as necessary. . In the present invention, polyethylene wax, microcrystalline wax, and paraffin are particularly preferable in order to achieve excellent usability such as stability over time, non-stickiness, and non-stickiness. Some of these are commercially available in a premixed form, but any one having a melting point of 55 ° C. or higher can be used without any particular problem.

  The blending amount of the component (a) used in the hair coloring agent of the present invention is not particularly limited, but it is excellent in colorability at the time of use, but is not sticky or stiff against the hair at the time of use. In consideration of the stability over time, it is preferably 3 to 15% by mass (hereinafter simply referred to as “%”), and more preferably 5 to 10% by mass.

  The component (b) isostearic acid used in the present invention is a saturated side chain fatty acid having 18 carbon atoms and is not particularly limited as long as it is usually used in cosmetics. For example, it can be obtained by purifying 2-heptylundecanoic acid obtained by the gerbet method, 2-isoheptylisoundecanoic acid obtained by the aldol condensation method, and a side chain fatty acid having 18 carbon atoms by-produced during the production of dimer acid. Is. In the present invention, it is added for the purpose of ease of washing off at the time of shampooing without giving a feeling of use such as stickiness and stiffness to the hair.

  The blending amount of the component (b) used in the hair colorant of the present invention is 10 to 30% in terms of ease of washing off at the time of shampooing without giving a feeling of use such as stickiness and stiffness to the hair at the time of use. More preferably, it is 15 to 25%. If it is less than 10%, the ease of washing off at the time of shampooing deteriorates, and if it exceeds 30%, it gives a feeling of stickiness.

  The component (c) inorganic coloring pigment used in the present invention is a component blended to obtain a coloring effect by applying the pigment component to the hair surface. The kind of the inorganic coloring pigment is not particularly limited as long as it is usually blended in cosmetics, and its shape (spherical, needle-like, plate-like, etc.) and particle diameter (smoke, fine particles, Regardless of pigment grade or the like, or any particle structure (porous, nonporous, etc.), any one can be used.

Specifically, inorganic red pigments such as iron oxide, iron hydroxide and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, black iron oxide, carbon black Inorganic black pigments such as manganese violet, inorganic violet pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide and cobalt titanate, inorganic blue pigments such as bitumen and ultramarine blue, and tar dyes Examples include raked products, lacquered natural pigments, mica titanium, and composite powders obtained by combining these powders, but are not limited thereto. It is possible to use more than one species.
In the present invention, so-called extender pigments such as talc, mica and sericite may be blended as long as the effects of the present invention are not impaired. Colorability as a material may be a problem. In particular, in the case of gray hair concealment used for the purpose of making the white hair part seen at the hairline inconspicuous, it is preferable not to add such an extender, and it is less than 5%, more preferably less than 1%. It is preferable.

  The blending amount of the component (c) inorganic color pigment used in the present invention is preferably 25 to 55%, more preferably 30 to 45%. This blending amount is considerably larger than the blending amount usually used for eyeliner, mascara and the like. If it is less than 25%, a sufficient hair coloring effect cannot be obtained, and if it exceeds 55%, the pigment concentration increases, so that the hair colorant is too hard and the moldability and usability may be impaired.

The component (c) of the present invention can be hydrophobized. Hydrophobizing treatment can contribute to improving the dispersibility of the component (c) in the hair coloring agent by modifying the surface properties of the inorganic coloring pigment and suppressing aggregation of the pigments. As the component used for the hydrophobization treatment (hereinafter referred to as a hydrophobizing agent), any component can be used as long as it is chemically or physically adsorbed on the surface of the inorganic color pigment to make the pigment surface hydrophobic. can do. Specifically, methylpolysiloxane, dimethylpolysiloxane, methylhydrogenpolysiloxane, (dimethicone / methicone) copolymer, reactive silicone, reactive silane, reactive alkyl titanium, high viscosity silicone, cross-linked silicone, acrylic modification Silicone compounds such as silicone, fluorine-modified silicone, and silicone resin, surfactants such as anionic surfactant, cationic surfactant, and nonionic surfactant, metal soap, polyisobutylene, wax, oils such as fats and oils, perfluoro Fluorine compounds such as alkyl phosphoric acid (salt), perfluoropolyether, and perfluoropolyether alkyl phosphoric acid, and PVP-modified polymers such as PVP-hexadecene copolymer can be used, and one or more of these can be used. . In view of the effect of improving the dispersibility of the inorganic coloring pigment, a silicone compound is particularly preferable. As a commercial item, KF-96 series, such as KF-96 (20cs), KF-99P, KF-9901 (made by Shin-Etsu Chemical Co., Ltd.), etc. are mentioned.
Moreover, the method of hydrophobizing component (c) is usually a known method, and examples thereof include a wet method using a solvent such as isopropyl alcohol, a gas phase method, a mechanochemical method, and the like.

  In the hair colorant of the present invention, the coating amount of the hydrophobizing agent on the component (c) is not particularly limited and varies depending on the type of the treating agent and the type of the inorganic coloring pigment. Is a mass ratio and is preferably inorganic color pigment: hydrophobizing agent = 99.95: 0.05 to 85:15, particularly preferably 99.5: 0.5 to 93: 7. It is preferable to coat the component (c) within this range because a surface-coated powder excellent in hydrophobicity can be obtained.

  The hair colorant of the present invention preferably has the effect of color development and the ease of washing after washing by making the component (b) and the component (c) into a specific blending mass ratio. It becomes possible. 0.5-4 is preferable and, as for such compounding mass ratio (c) / (b), 1-3 are more preferable. By making this range, component (b) isostearic acid suppresses the cohesiveness of component (c) inorganic coloring pigments and prevents the poor feeling of use when the pigments adhere to the hair. The stability over time is improved, and the color developability is improved. Further, it is considered that isostearic acid contributes to peeling off the inorganic coloring pigment from the hair together with the cleaning component when the hair is washed after use as a hair coloring agent.

The hair coloring agent of the present invention is obtained by blending the above essential components (a) to (c), and further, as component (d), tetraethylhexane which is a tetraester of 2-ethylhexanoic acid and pentaerythritol. By blending the pentaerythrityl acid, it is more preferable in terms of reducing the stiffness of the hair during use caused by blending a large amount of the component (c) inorganic coloring pigment with an oil film having less stickiness. Is possible. Such a component (d) will not be specifically limited if normally used for cosmetics.

The blending amount of the component (d) used in the hair colorant of the present invention is preferably 5 to 25%, more preferably 10 to 20%, from the viewpoint of use feeling such as stiff hair. If it is less than 5%, the component (c) inorganic color pigments may come to the front and the usability may not be good. If it exceeds 25%, the oily feeling of the component (d) occurs and the stickiness is felt. Therefore, usability may be impaired.

In addition to the essential components described above, the hair colorant of the present invention includes components used in ordinary cosmetics, for example, water-soluble polymers, alcohols, aqueous components such as water, surfactants, ultraviolet absorbers, Moisturizers, antioxidants, cosmetic ingredients, preservatives, fragrances and the like can be appropriately blended within a range that does not impair the effects of the present invention.

The hair colorant of the present invention must have an oily outer phase, but may contain water-based components, and may be used for either oily or water-in-oil emulsification or water-in-oil solubilization. In addition, the property can be any of liquid, paste, and solid, but when considering the usability, it is preferably used as an oily solid.
Examples of the use of the hair coloring agent of the present invention can include hair mascara, hair manicure, hair concealer, hair foundation, gray hair concealment, etc., but in the present invention, a specific part such as hairline It is particularly suitable for use as a gray hair concealment used for hair.
Examples of the method of use include a method of filling a container such as a metal dish or a resin dish, or a stick-shaped container, and applying with a brush, puff, chip or the like.

The hair coloring production method of the present invention can be produced by a generally known method, and the production equipment may be any dispersion equipment such as a general dispersion or a three-roll mill. In particular, the present invention can be obtained by uniformly mixing and dissolving the component (a) and the component (b) using a dispersion, adding the component (c), and mixing them using a three-roll mill.

The hair colorant of the present invention thus obtained is characterized in that it has excellent color developability during use, stickiness to the hair, no stiffness, ease of washing off during hair washing and stability over time. is there. This is because film forming polymers such as amino-modified polyether-modified silicone, polyvinyl acetate, and polyisobutylene, and cationic resins, amphoteric resins, anionic resins, or nonionic resins that have been widely used conventionally. It can be realized without blending a resin. When blended, it is preferably 1%, preferably 0.5%, more preferably less than 0.1%. By setting the blending amount within this range, it is preferable because it is excellent in usability such as stickiness and wrinkle.

Hereinafter, the present invention will be described in detail with reference to examples. Note that these do not limit the present invention.
Invention products 1 to 8 and comparative products 1 to 7: Hair colorant (oil-based solid type)
Oily solids were prepared by the compositions shown in Tables 1 and 2 and the following production method. Tables 1 and 2 also show the results of the evaluation of the coloring property at the time of use, the stickiness to the hair, the non-stiffness, and the ease of washing off at the time of washing with the following methods.

(Production method)
A: Components (1) to (11) are uniformly heated and dissolved.
B: (12) to (13) are mixed with A and mixed using a three-roll mill.
C: B was dissolved and filled in a metal dish container to obtain a hair coloring agent.

(Evaluation method 1: Sustainability of color development)
By 10 professional evaluation panels, the samples 1 to 8 of the present invention and the samples 1 to 7 of the present invention were evaluated for color developability using the following (a) 5-step evaluation criteria.

(A) Five-level evaluation criteria (evaluation)
5: Colored well and remains well over time 4: Colored well and remains almost to the same degree 3: Colored well and gray hair slightly floats over time 2: Colored but gray hair floats over time 1: Colored poorly over time No color remains

(Evaluation method 2: no stickiness)
The non-stickiness of each of the inventive products 1-8 and the comparative products 1-7 was evaluated by 10 professional evaluation panels using the following (b) 5-step evaluation criteria.

(B) Five-level evaluation criteria (evaluation)
5: No stickiness 4: No stickiness 3: Feels slightly sticky 2: Slightly sticky 1: Pretty sticky

(Evaluation Method 3: No Stiffness)
The ten professional evaluation panels evaluated the samples of the present invention products 1 to 8 and the comparative products 1 to 7 using the following (d) five-step evaluation criteria.

(D) Five-level evaluation criteria (evaluation)
5: Not sticky at all 4: Not sticky 3: Slightly sticky 2: Slightly sticky 1: Pretty sticky

(Evaluation method 4: Ease of washing when washing hair)
Ten professional evaluation panels evaluated the samples 1 to 8 of the present invention and the comparative products 1 to 7 for ease of dropping at the time of shampooing using the following (e) 5-step evaluation criteria.

(E) Five-level evaluation criteria (evaluation)
5: The color falls very well 4: The color falls well 3: The color remains inconspicuous but slightly remains 2: The color remains 1: The color remains almost

The products 1 to 8 of the present invention were not sticky or wrinkled during use, and the color development property was maintained over time, and it was possible to easily remove them with a commercially available shampoo when washing hair. On the other hand, Comparative Product 1 with a small amount of component (b) was inferior in stickiness and inferior in washing off at the time of shampooing. In Comparative Product 2 having a large amount of component (b), the color developability was not sustained and the tackiness was inferior. In Comparative Product 3 with a small amount of component (c), the color developability was inferior. Moreover, the comparative product 4 having a large amount of component (c) feels stiff and was inferior in the ease of washing at the time of washing the hair. The comparative product 5 or comparative product 7 in which another oil component was used instead of isostearic acid, and the comparative product 6 not blended with isostearic acid were inferior in firmness and inferior in rinsing at the time of shampooing. That is, it has been found that isostearic acid is a particularly excellent component in the present invention, and the effects of the invention cannot be obtained unless this component is blended.

Example 2: Hair colorant (oil-based liquid)
(Ingredient) (%)
1. Polyethylene wax (melting point 85 ° C) 1
2. Paraffin (melting point 70 ° C.) 0.1
3. Isostearic acid 20
4). 4. Liquid paraffin remaining Polyhydroxystearic acid 3
6). Dimethyl distearyl ammonium hectorite 2
7). Propylene carbonate 0.5
8). Dialkyl carbonate 10
9. Black iron oxide 40

(Production method)
A: Components (1) to (5) are uniformly mixed and dissolved.
B: Roll components (6) to (7) to swell uniformly.
C: A, B and component (9) were mixed and dispersed uniformly to obtain a hair colorant.

  The hair colorant of Example 2 has excellent color developability at the time of use, but does not give a feeling of use such as stickiness and stiffness to the hair, and sustains the color developability, and is easy to wash off when washing the hair. The hair colorant was also excellent in stability over time.

Example 3: Hair coloring (water-in-oil type)
(Ingredient) (%)
1. Polyethylene wax (melting point 90 ° C) 1
2. Paraffin (melting point 65 ° C.) 0.1
3. Isostearic acid 20
4). 4. Liquid paraffin remaining Polydimethylsiloxyethyl dimethicone 3
6). Inulin stearate 2
7). Dialkyl carbonate 10
8). Black iron oxide 40
9. Cyclomethicone 5
10. PEG-9 polydimethylsiloxyethyl dimethicone 2
11. Purified water 10
12 Glycerin 3

(Production method)
A: Components (8) to (10) are mixed uniformly and dispersed uniformly.
B: Components (1) to (5) are uniformly mixed and dissolved.
C: The components (6) to (7) are uniformly swollen.
D: A to C are mixed uniformly.
E: Components (11) to (12) were emulsified in D to obtain a hair cosmetic.

The hair coloring agent of Example 3 is excellent in colorability at the time of use, but does not give a feeling of use such as stickiness and stiffness to the hair, and it is possible to maintain the colorability and to be easily washed off at the time of washing the hair. The hair colorant was also excellent in stability over time.

Claims (5)

The following components (a) to (c);
(A) Oil having a melting point of 55 ° C. or higher (b) 10 to 30% by mass of isostearic acid
(C) Inorganic color pigment 25-55 mass%
A hair coloring agent characterized by comprising The hair colorant according to claim 1, wherein the blending mass ratio (c) / (b) of the component (b) and the component (c) is 0.5-4. Furthermore, the hair coloring agent of Claim 1 or 2 which mix | blends a tetraethyl hexanoic acid pentaerythrityl as a component (d). The hair colorant according to any one of claims 1 to 3, wherein the component (a) is one or more selected from polyethylene wax, microcrystalline wax, and paraffin. The hair colorant according to any one of claims 1 to 4, wherein the component (c) is an inorganic coloring pigment that has been subjected to a hydrophobic treatment.