JP2009191040A - Acidic hair dye composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acidic hair dye composition exhibiting an excellent dyability for the hair. <P>SOLUTION: The acidic hair dye composition contains an acidic dye, an alkanediol and an acid. The composition is free from the drawback that it does not cause disheveled hairs, as benzyl alcohol does, when it is not rinsed out and has a remarkably better hair dyeing effect than an aromatic alcohol hitherto known as a hair dye. To be more specific, the composition contains an acidic dye, an alkanediol and an acid, has a pH of 1.5-4.0, and includes 0.2-5.0 wt.% of 1,2-octanediol. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an acidic hair dye composition that exhibits excellent hair dyeing properties containing an alkanediol.

  Conventionally, oxidative hair dyes using oxidative dyes such as paraphenylene diamine have been the mainstream, but these have to be treated under strong alkaline conditions, and they have safety concerns such as causing damage to the hair or skin. Problems, odor problems, and hair feeling after dyeing. For this reason, the development of hair dyes using acidic dyes with less of these problems has been made. Examples thereof include JP-A-61-53211, JP-A-62-164612, JP-A-63-239209, JP-A-5-221840, and JP-A-6-107529.

However, in the case of hair dyes using these acid dyes, a satisfactory hair dyeing effect cannot be obtained unless benzyl alcohol is added. However, benzyl alcohol is not a problem in the case of a wash-off type hair dye, but it does not wash out, that is, it remains on the hair, so in the case of a so-called leave-on type hair dye, it adheres to the hair for a long time, so the hair is dry. There was a drawback of attaching. On the other hand, phenylethyl alcohol and phenoxyethanol, which are aromatic alcohols, can be cited as substitutes for benzyl alcohol, but the effect is not sufficient.
Fragrance Journal 2004-10 pp. 56-62 “Development Trend of Direct Dye Penetration Technology” Summary of the 5th SCCJ Seminar September 2, 1997, pp. 64-80 “Hair Color Product Evaluation Technology”

Alkanediols used in the present invention are known to have a bactericidal effect, and attempts have been made to blend them in cosmetics as antiseptic bactericides. A non-sticky hair styling effect has also been discovered, but no excellent hair coloring effect is known. (Patent Documents 1 to 4)
JP 2004-182611 A JP 2004-189636 A JP 2004-155724 A JP 2004-115383 A

As a result of intensive studies in order to obtain such an acidic hair dye composition, the present inventors have obtained a composition having desired properties by blending an acidic dye, an alkanediol and an acid. The inventors have found that this can be solved, and have completed the present invention.
That is, this invention provides the acidic hair dye composition which mix | blends acidic dye, alkanediol, and an acid. That is, the acidic hair composition of the present invention does not have the disadvantage that the hair is crusty like benzyl alcohol, and the composition for acidic hair has a significantly better hair coloring effect than the aromatic alcohols conventionally known as hair dyes. It is a thing.

  Hereinafter, the configuration of the present invention will be described in detail.

  The acid dye used in the present invention is not particularly limited. For example, Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 201, Red No. 227, Red No. 230, Red 232, Red 401, Red 502, Red 503, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Yellow 402, Yellow 406, Blue 1, Blue 2, Blue 202 , Blue 203, Blue 205, Orange 205, Orange 207, Orange 402, Green 3, Green 204, Green 205, Green 401, Green 402, Brown 201, Purple 401, Black 401 etc. can be mentioned.

  The amount of the acidic dye is not particularly limited, but is preferably in the range of 0.0001 to 0.2% by weight, particularly preferably 0.001 to 0.1% by weight, based on the total amount of the composition. If it is less than 0.0001% by weight, the hair dyeing property cannot be fully exhibited unless the hair is left unwashed for days, and the object of the present invention cannot be achieved. On the other hand, although it may mix | blend exceeding 0.2 weight%, since a color is dark, when a hat is worn or a hair is touched by hand, it may be unpreferable. Moreover, in order to provide a desired color, these 1 type (s) or 2 or more types can also be used in arbitrary combinations.

  The alkanediol of the present invention can be adopted as long as it is an alkanediol such as pentanediol, hexanediol, octanediol, etc., but is preferably 1,2-octanediol. The blending amount of the alkanediol is not particularly limited, but is preferably 0.01 to 10% by weight. More preferably, it is 0.2 to 5% by weight. If it is 0.01% by weight or less, the object of the present invention may not be achieved. If it is 10% by weight or more, the hair dyeing effect is good, but the preparation may become unstable.

  The pH of the acidic hair dye composition of the present invention is 1.5 to 4.0, preferably 2.0 to 3.5. If the pH is less than 1.5, the safety such as skin irritation is caused. If it exceeds 4.0, the hair dyeability is lowered, which is not preferable. An acid is used to adjust the composition to a suitable pH. Examples of the acid include inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid, or organic acids such as acetic acid, citric acid, tartaric acid, propionic acid, lactic acid, salicylic acid, glycolic acid, succinic acid, malic acid, and butyric acid. Of these, one or two or more of them can be used arbitrarily. Among them, hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, lactic acid, salicylic acid, glycolic acid, and succinic acid are preferable. Acid, citric acid, and glycolic acid are preferable because the hair dyeability is remarkably improved. In addition, by combining alkali metal salts of these acids such as sodium citrate, sodium hydroxide, disodium hydrogen phosphate, potassium hydroxide, etc., it is possible to provide pH buffering ability within a suitable pH range. it can.

  The composition of the present invention can be in various forms such as gel, paste, and cream.

  In order to produce the acidic hair dye composition of the present invention, for example, it is rapidly added to a large amount of purified water in which an acidic dye or the like is dissolved and uniformly dissolved. After confirming uniform dissolution, the mixture is slowly cooled to 40 ° C., and an appropriate amount of a volatile solvent in which alkanediol is dissolved in advance and an acid are added to adjust to a desired pH.

  In order to use the acidic hair dye composition of the present invention, for example, it is a method of forming a gel and applying it to the hair with a comb or the like and leaving it like a hair gel. In particular, the composition of the present invention is preferably subjected to a heating treatment before, during or after application, since the hair dyeing property is further improved. In this heating treatment, after the composition of the present invention is applied to the hair, for example, the application part is heated by steam such as steamer, steam towel, etc., warm air from a dryer, far infrared rays, etc. The composition may be washed away.

  In addition to the above essential components, the acidic hair dye composition of the present invention is a variety of components used in normal cosmetics, quasi drugs, pharmaceuticals, etc., for example, other surfactants, oily components, humectants, thickeners. Agents, chelating agents, medicinal ingredients, preservatives, dyes, pigments, powders, pH adjusters, ultraviolet absorbers, antioxidants, fragrances and the like can be appropriately blended.

  The acidic hair dye composition of the present invention does not have the disadvantage that the hair is crusty like benzyl alcohol, and has a significantly better hair dyeing effect than the aromatic alcohols conventionally known as hair dyes. The present invention is described in detail below.

  Hereinafter, the present invention will be described in more detail with reference to experimental examples and examples, but the present invention is not limited thereto. In the examples, “%” means wt% unless otherwise specified.

  A gel-like composition for acidic hair was produced from the components of Experimental Examples and Comparative Examples shown in Table 1 according to a conventional method, and the pH was adjusted to 2.5 with citric acid. Various evaluations were made by the following methods. In Experimental Example 6, the hair dyeing effect was satisfactory, but the viscosity was slightly lower than in the other examples.

<Evaluation of hair dyeing effect of acidic hair dye composition>
1 g of the composition of Experimental Examples 1 to 6 and Comparative Example 1 was applied to about 2 g of a hair bundle (Japanese) that had been washed and air-dried in advance, and then allowed to stand at room temperature for 8 hours, then rinsed with running water, Washed twice with 10% aqueous sodium lauryl sulfate solution and dried. Then, the hair dyeing effect was evaluated visually. The evaluation criteria are shown below.
(Double-circle): It recognized that there was a hair dyeing effect.
○: A slight hair dyeing effect was recognized.
X: It was recognized that there was almost no hair dyeing effect.

  A gel-like acidic hair dye composition was produced from the components of the experimental examples and comparative examples shown in Table 2 according to the method described above, and the pH was adjusted to 2.0 with glycolic acid. And the hair dye sample was produced by the method similar to Example 1, and also variously evaluated by the following methods. The same experiment was conducted by changing 1,2-octanediol to benzyl alcohol in the formulation of Experimental Example 7, but although the hair dyeing effect was higher than Experimental Example 7, the hair was so crisp and there was no commercial value. there were.

○: From Example 7, it was recognized that there was a hair dyeing effect or that there was no hairiness.
(Triangle | delta): It recognized that the hair dyeing effect was equivalent to Example 7, or the roughness of the hair was equivalent.
X: It was recognized that the hair dyeing effect was weaker than in Example 7 or the hair was crisp.

<Hair dyeing effect due to pH difference>
The base was prepared by changing the pH according to the amount of citric acid in the formulation of Experimental Example 4, and the hair dyeing effect was evaluated. The pH was adjusted to the desired pH by adjusting the amount of glycolic acid. In addition, at pH 1.5, the viscosity decreased after 1 month at 40 ° C.

(Double-circle): It recognized that there was a hair dyeing effect.
○: Recognized that the hair dyeing effect was slightly present.
X: Recognized that there was not much hair dyeing effect.

  Examples for describing the present invention in detail are given below, but the present invention is not limited thereto.

Hair dye cream 1
Compounding ingredients Compounding amount (% by weight)
(1) 1,3-butylene glycol 5
(2) Bentonite 3
(3) Water residue (4) 1,2-octanediol 5
(5) Mineral oil 2
(6) Octyl methoxycinnamate 0.001
(7) (Acrylic acid / alkyl acrylate (C10-30)) copolymer
0.2
(8) Fragrance 0.3
(9) Glycolic acid 0.5
(10) Purple No. 401 0.0005
(11) Black 401 No. 0.001
(12) Orange 205 No. 0.0015

[Production method]
Add (3) to (7) uniformly dispersed with a homomixer to well mixed (1) and (2) and uniformly disperse with a homomixer. (9) to (12) are previously dissolved in a part of (3). (8) to (12) are added in order and uniformly dispersed with a homomixer.

Hair dye cream 2
Compounding ingredients Compounding amount (% by weight)
(1) 1,3-butylene glycol 10
(2) Bentonite 2
(3) Xanthan gum 2
(4) Water residue (5) 1,2-octanediol 3
(6) Mineral oil 1
(7) (Acrylic acid / alkyl acrylate (C10-30)) copolymer
0.2
(8) Phosphoric acid 1.3
(9) Orange 205 No. 0.2
(10) Red No. 106 0.0015
(11) Black 401 No. 0.001
(12) Yellow No. 406 0.0005

[Production method]
(4) to (7) uniformly dispersed with a homomixer are added to well mixed (1) to (3) and uniformly dispersed with a homomixer. (8) to (12) are previously dissolved in a part of (4). (8) to (12) are added in order and uniformly dispersed with a homomixer.

Hair dye gel
Compounding ingredients Compounding amount (% by weight)
(1) Water residue (2) Hydroxypropyl methylcellulose 3
(3) Citric acid 0.2
(4) Ethanol 20
(5) 1,2-octanediol 2
(6) Orange 205 No. 0.015
(7) Purple 401 0.01
(8) Black 401 No. 0.01
(9) Yellow No. 4 0.003

  [Production method] (1) to (3) are dispersed at 85 ° C and then cooled, and (4) to (9) are added at 45 ° C and cooled to 30 ° C. (6) to (9) are previously dissolved in a part of (1).

  Examples 4 to 6 also had a good hair dyeing effect.

The present invention relates to an acidic hair dye composition that exhibits excellent hair dyeing properties containing an alkanediol.

Claims (4)

  An acidic hair dye composition of a non-washing type characterized by containing an acid dye and alkanediol and having a pH of 1.5 to 4.5.   The acidic hair dye composition according to claim 1, wherein the content of alkanediol is 0.01 to 10.0% by weight.   The acidic hair dye composition according to claim 1 or 2, wherein the alkanediol content is 0.2 to 5.0% by weight and the pH is 3.0 to 4.0.   The acidic hair dye composition according to any one of claims 1 to 3, wherein the alkanediol is 1,2-octanediol.