JPH09323921A - Hair dyeing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hair dyeing composition excellent in dyeing property, resistance to hair washing and stability by dispersing only specific copolymer or the specific copolymer combined with a polyvinyl alcohol into an alcohol and further, blending the dispersion with an acid and an acidic dye and controlling pH of the blend to a specific range. SOLUTION: This hair dyeing composition is obtained by dispersing (A) an alkyl acrylate-methacrylate copolymer (alkyl is 10-30C) alone or the copolymer combined with polyvinyl alcohol into (B) one or two or more kinds of monovalent alcohols selected from among benzyl alcohol, n-butanol, cyclohexanol, phenoxyethanol and benzyloxyethanol and further blending the dispersion with (C) an acid and (D) an acidic dye and controlling pH of the blend to 1.5 to 4.5. The composition preferably contains the components A, B, C and D at the blending ratio of (about 0.2-10wt.%):(about 2-20wt.%):(about 0.2-7wt.%):(about 0.05-1wt.%).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dye composition having excellent dyeing properties, wash resistance and stability.

[0002]

2. Description of the Related Art Oxidized hair dyes that have been widely used in the past are used in order to make hydrogen peroxide act under alkaline conditions during use.
There is a risk of causing hair damage and primary skin irritation depending on the treatment method. For this reason, acidic hair dyes have been developed that use acidic dyes that have little effect on the scalp and hair. However, the commercially available acidic hair dye is not satisfactory in terms of dyeing property, hair wash resistance and stability as compared with the oxidative hair dye.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hair dye composition which is excellent in dyeing property, hair wash resistance and stability.

[0004]

Means for Solving the Problems As a result of various studies by the present inventor, (1) an acrylic acid / alkyl methacrylate copolymer having an alkyl group having 10 to 30 carbon atoms, alone or in combination with polyvinyl alcohol By using (2), one or more monohydric alcohols selected from (2) benzyl alcohol, n-butanol, cyclohexanol, phenoxyethanol and benzyloxyethanol are dispersed, and (3) acid and (4) ) Mixing with an acid dye and adjusting the pH to 1.5-
The inventors have found that the hair dye composition obtained by adjusting to 4.5 is excellent in dyeing property, hair wash resistance and stability, and completed the present invention.

The present invention will be described in detail below.

The (1) alkyl acrylate / alkyl methacrylate copolymers having an alkyl group of 10 to 30 carbon atoms used in the present invention include PEMUREN TR-1 and PE.
MUREN TR-2 (Both Goodrich BFGoodrich
Examples of polyvinyl alcohol include Goshenol EG series (product name of Nippon Synthetic Chemical Industry Co., Ltd.) and the like, and the total amount thereof is from 0.05 to
It is 15% by weight, preferably 0.2 to 10% by weight. If it is less than 0.05% by weight, the monohydric alcohol cannot be sufficiently dispersed, and if it exceeds 15% by weight, the fluidity is lost and the usability is poor.

The blending amount of (2) one or more monohydric alcohols selected from the group consisting of benzyl alcohol, n-butanol, cyclohexanol, phenoxyethanol and benzyloxyethanol used in the present invention is 1 to 30% by weight. %, Preferably 2 to 20% by weight. If it is less than 1% by weight, a sufficient dyeing effect is not exerted, and if it exceeds 30% by weight, there is no significant difference in improvement of the dyeing effect.

Examples of the (3) acid used in the present invention include organic acids such as glycolic acid, lactic acid, citric acid, tartaric acid and malic acid, and inorganic acids such as phosphoric acid and hydrochloric acid, and the blending amount thereof is 0. 1 to 10% by weight, preferably 0.2 to 7
% By weight. If it is less than 0.1% by weight, a sufficient dyeing effect is not exhibited, and if it exceeds 10% by weight, there is no significant difference in the improvement of the dyeing effect. Further, a salt of the above acid can be used as a pH adjuster.

The acid dye (4) used in the present invention is selected from legal dyes defined by "Ministerial Ordinance for Defining Tar Dyes that can be Used in Pharmaceuticals" that does not have a harmful effect on the human body. One kind or a combination of two or more kinds can be used. The blending amount is 0.
It is 001 to 2% by weight, preferably 0.05 to 1% by weight. If it is less than 0.001% by weight, a sufficient dyeing effect is not exhibited, and if it exceeds 2% by weight, there is no significant difference in improvement of the dyeing effect.

The hair dye composition of the present invention has a system stability,
In addition to the above components, hydrocarbons, oils and fats, esters, higher alcohols, silicones, nonionic surfactants, anionic surfactants, amphoteric surfactants, and amphoteric surfactants, and A viscous agent, a preservative, a chelating agent, a perfume, etc. can be added.

Further, the hair dye composition of the present invention can be formed into a desired form within a range that does not impair the effects of the present invention. For example, by adding a thickening agent, it can have any viscosity from emulsion to cream.

Specific examples of the thickener used in the present invention include water-soluble polymers such as hydroxyethyl cellulose, carboxymethyl cellulose, hydroxypropylmethyl cellulose, xanthan gum, pullulan, pectin, tamarind seed, tragacanth gum, gum arabic, and sodium alginate. Each of these can be used alone or in combination of two or more. The blending amount is 0.2 to 10% by weight, preferably 0.5 to 5
% By weight. If it is less than 0.2% by weight, sufficient viscous effect is not exhibited, and if it exceeds 10% by weight, fluidity is lost and usability is poor.

Further, the hair dye composition of the present invention comprises a combination of a propellant gas and one or more foaming agents selected from nonionic surfactants, anionic surfactants and amphoteric surfactants. Thus, a foam aerosol preparation can be obtained.

[0014]

EXAMPLES Next, examples of the present invention will be described.

Examples 1 to 4 in Table 1 and Comparative Examples 1 to 4 in Table 2
Each of the hair dye compositions was prepared and applied to a human hair bundle containing white hair, left at room temperature for 10 minutes, washed with a commercially available shampoo, and dried to evaluate the dyeability.

Each of the hair dye compositions of Examples 1 to 4 in Table 1 and Comparative Examples 1 to 4 in Table 2 was applied to a human hair bundle containing white hair, left at room temperature for 10 minutes, and then washed with a commercially available shampoo. And dry. This hair bundle was washed with a commercially available shampoo and dried 20 times, and compared with a hair bundle after repeated 20 times to evaluate the effect of hair wash resistance.

Further, each of the hair dye compositions of Examples 1 to 4 in Table 1 and Comparative Examples 1 to 4 in Table 2 was 40
Stability was evaluated for 3 months while maintaining at 0 ° C.

[0018]

[Table 1] Examples Evaluation criteria ◎: Very good ○: Good △: Not very good ×: Poor margin below

[0019]

[Table 2] Comparative example Evaluation criteria ◎: Very good ○: Good △: Not very good ×: Bad

From Tables 1 and 2, it can be seen that lack of acrylic acid / alkyl methacrylate copolymer results in poor stability, and lack of benzyl alcohol or acid results in poor dyeing property and hair wash resistance.

[0021]

The foamed aerosol hair dye composition of Example 5 formed a good foam, was applied to a human hair bundle containing white hair, allowed to stand at room temperature for 10 minutes, washed with a commercial shampoo, dried and dyed. When it was evaluated for its properties, it showed excellent dyeing properties.

[0023]

According to the present invention, it is possible to obtain a hair dye composition having excellent dyeing properties, hair wash resistance and stability.

Claims (5)

[Claims] 1. A carbon number of (1) an alkyl group is 10 to 30.
And one or more selected from the group consisting of (2) benzyl alcohol, n-butanol, cyclohexanol, phenoxyethanol, and benzyloxyethanol. A hair dye composition containing the monohydric alcohol, (3) acid, and (4) acid dye, and having a pH of 1.5 to 4.5. 2. (1) The alkyl group has 10 to 30 carbon atoms.
The hair dye composition according to claim 1, wherein the compounding amount of the acrylic acid / alkyl methacrylate copolymer, which is a single type or a combination of polyvinyl alcohol and polyvinyl alcohol, is 0.05 to 15% by weight. 3. The compounding amount of (1) one or more monohydric alcohols selected from benzyl alcohol, n-butanol, cyclohexanol, phenoxyethanol and benzyloxyethanol is 1 to 30% by weight. The hair dye composition according to 1. 4. The compounding amount of (3) acid is 0.1 to 10% by weight.
The hair dye composition according to claim 1, which is 5. The compounding amount of (4) acid dye is 0.001 to 0.001.
The hair dye composition according to claim 1, which is 2% by weight.