JP2000026243A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject hair cosmetic that can effectively prevent the hair dyed with an anionic dye from discoloring with high color durability and sustain the hair-conditioning effect for a prolonged time by using chitosan, poly(diallyldimethylammonium chloride) and the like. SOLUTION: This hair cosmetic includes (A) chitosan, for example, with a molecular weight of 20,000-200,000, (B) poly(diallyldimethylammonium chloride), for example, with average molecular weight of 10,000-1,000,000, and (C) an organic solvent, for example, benzyl alcohol or the like. In a preferred embodiment, the components A, B and C are formulated to an objective cosmetic by 0.5-10 wt.%, 0.5-10 wt.% and 1-5 wt.%, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic composition which is excellent in washing resistance for preventing color fading of hair dyed with an anionic dye, and has a good feeling in use and finish.

[0002]

2. Description of the Related Art Due to aging of hair, the hair becomes gray,
In addition, the color of hair may change due to chemical treatment such as perm. In such cases, the most common effective method is to use a hair dye when it is desired to restore the hair to its original color. One of the hair dyeing methods is to use an oxidative hair dye.However, since hydrogen peroxide acts under alkaline conditions during treatment, it may cause hair damage and primary skin irritation depending on how it is used. Was. For this reason, hair dyes using anionic dyes have been developed as hair dyes having little effect on hair and scalp.

[0003] This method is safer than the method using an oxidation dye and has no danger of damage to the hair. However, since the hair dyeing power is weak, a clear color can be obtained by washing several times or using a hairdressing agent. Fall is seen. Therefore, as disclosed in JP-A-4-69323, an organic solvent or the like is added to the hair dye itself as a hair dyeing accelerator in order to improve the fastness to washing of the hair dye comprising an anionic dye. It was mixed.

[0004]

However, even when a hair dye is mixed with a hair dye, it is difficult to prevent discoloration due to repeated use of a shampoo or the like after dyeing. For this reason, there has been a demand for the development of shampoos, treatments, hair stylings, and the like that do not discolor even when repeatedly used for hair dyed with an anionic dye.

[0005]

Means for Solving the Problems The inventors of the present invention have made intensive studies to overcome the above-mentioned drawbacks, and as a result, have found that hair that has been dyed with an anionic dye can be effectively prevented from discoloring and the color lasts longer. And completed the present invention.

That is, the present invention is a hair cosmetic containing chitosan, a polydiallyldimethylammonium salt and an organic solvent as an agent for preventing discoloration of hair dyed with an anionic dye.

The chitosan, the diallyldimethylammonium chloride salt and the organic solvent used in the present invention have a function of preventing color fading of the dyed hair, prolonging the color and maintaining the conditioning effect for a long time.

The anionic dyes used in the present invention include, for example, reactive dyes, direct dyes, acid dyes and the like, with acid dyes being particularly preferred.

The chitosan used in the present invention has a molecular weight of 2
It is 10,000 to 200,000, preferably 50,000 to 100,000. When it is less than 20,000, the washing resistance is reduced, and when it exceeds 200,000, the feeling is hard and heavy, giving a finished feeling.

The amount of chitosan is 0.5 to 10% by weight, preferably 1 to 5% by weight in the cosmetic for hair. When the amount is less than 0.5% by weight, the effect of the present invention is not exhibited.

The polyallyldimethylammonium chloride salt used in the present invention has an average molecular weight of 10,000 to 100.
10,000, preferably 50,000 to 500,000. If it is less than 10,000, the washing resistance is reduced, and if it exceeds 1,000,000, the feeling is hard,
It gives a heavy finish.

The amount of the poly (diallyldimethylammonium chloride) is 0.5 to 10% by weight, preferably 1 to 5% by weight in the cosmetic for hair. 0.5
If the amount is less than 10% by weight, the effect of the present invention is not exhibited. If the amount is more than 10% by weight, the feeling is hard and a heavy finish is felt. In addition, squeaky feeling is caused, and problems such as worsening of comb passage are caused.

The organic solvent used in the present invention includes, for example, N-alkylpyrrolidone, lower alkylene carbonate, benzyl alcohol, etc., preferably benzyl alcohol.

The amount of the organic solvent is 1 to 5% by weight, preferably 1.5 to 3% by weight in the cosmetic for hair. When the amount is less than 1% by weight, the effect of the present invention is not exerted.

The hair cosmetic composition of the present invention contains a viscosity adjuster, a film-forming agent for hair setting, a hair quality improver, a pH adjuster, and a detergent as long as the effects of the present invention are not impaired. , Emulsifiers, emulsification aids, propellants and other components which are mediocre in hair compositions can be incorporated. Examples of the viscosity modifier include methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, water-soluble polymers such as xanthan gum, and non-ionic surfactants such as fatty acid alkylolamide, and the like. Are cationized cellulose, cationized starch, cationized guar gum, cationic polymers such as vinylpyrrolidone / N, N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, nonionic polymers such as polyvinyl alcohol, acrylic acid Anionic polymers such as ester-methacrylate copolymers and the like can be used. Further, as a hair quality improver, a silicone derivative or a cationic surfactant, as a pH adjuster, an acid such as citric acid or lactic acid or a salt thereof, an anionic surfactant or an amphoteric surfactant known as a detergent. Use nonionic surfactants such as polyoxyalkylene addition surfactants as emulsifiers, higher alcohols and glycerin fatty acid esters as emulsifiers, and liquefied petroleum gas, nitrogen gas, carbon dioxide gas, dimethyl ether, etc. as propellants. Can be. In addition to this, higher fatty acids, esters having straight or branched chains, oily components such as hydrocarbons and fats and oils, aqueous components such as polyhydric alcohols and lower alcohols, fragrances, preservatives, ultraviolet absorbers, oxidizing agents Inhibitor,
Other components that are usually blended in cosmetics, such as bactericides and cosmetic ingredients, can also be blended.

The cosmetic for hair of the present invention can be embodied in various forms such as a liquid, an emulsion, a mist, a cream, a gel, a mousse, and a powder, depending on the combination with other components and the mechanism of the container. You can do it.

[0017]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

Example 1, Comparative Examples 1 to 7

[Table 1] A hair cosmetic composition having the composition shown in Table 1 was prepared, and the hair was dyed using a hair dye consisting of an acid dye according to the following hair dyeing method. The transferability at that time, the washing resistance and the feeling after finishing were as follows. An evaluation test was performed. All units in the table are% by weight. This result

The results are shown in Table 1.

The chitosan used in Examples and Comparative Examples was
"Chitosan SK-10": manufactured by Koyo Chemical Co., Ltd .; molecular weight 70,000 to 80,000. The polychlorinated diallyldimethylammonium salt is “Cosmote VG”: manufactured by SENKA CORPORATION; molecular weight of about 2
100,000.

Migration test method Yak white hair, 10 cm in length and 1 g in weight, is a commercially available hair color treatment which is a hair dye consisting of an acid dye [Browne hair manicure "Natural Black": Kao Corporation
1 g of hair and washed with a shaking machine (120 times / minute) in a 10% aqueous solution of a commercially available shampoo [Rabina Cleansing Shampoo: manufactured by Kao Corporation] at 40 ° C. for 1 minute. Thereafter, it was rinsed with warm water of 40 ° C. for 2 minutes. After that, wipe off excess moisture and use 0.5g of hair cosmetic
After applying evenly, embroidery (cotton width, nylon taffeta)
And apply a load of 4.5 Kg to the thermostat at 37 ° C.
At intervals, the state of dye transfer to the patch is visually determined.

Evaluation Criteria ◎: Almost no migration is observed. や: Slight migration is observed. Δ: Migration is observed but the degree is light.

Washing resistance test After dyeing and shampooing in the same manner as in the transferability test, apply 0.5 g of a hair cosmetic evenly, then leave at room temperature for 5 minutes and rinse with warm water of 40 ° C. for 2 minutes. Shed. Then, using a washing tester (manufactured by Tsujii Dyeing Machine) for dyeing fastness test,
Wash in a 0% shampoo solution at 40 ° C. for 10 minutes. This is performed once, and a total of four times are performed, and the state of color fading is visually determined at each time.

Evaluation Criteria A: No discoloration was observed even after the fourth washing. ：: Discoloration was almost observed in the third washing. Δ: Discoloration was almost observed in the second washing. X: Almost all of the color was discolored in the first washing.

Hand test After dyeing and shampooing in the same manner as in the transferability test, apply 0.5 g of hair cosmetics uniformly, then leave at room temperature for 5 minutes and rinse with warm water of 40 ° C for 2 minutes. The feel of the yak hair after shedding and drying was evaluated.

Evaluation Criteria A: Very smooth, good in combing and gloss. ：: Smooth, good comb and gloss. Δ: Slight squealing, and both combing and gloss slightly poor.

[0026]

As is clear from the above, by treating a three-component hair cosmetic from a chitosan, a polyallyldimethylammonium chloride salt, and an organic solvent alone or two-component hair cosmetic, A clear improvement in the effect of preventing color fading is seen.

Examples 2 to 6, Comparative Example 8

[Table 2] Were prepared and evaluated for transferability, washing resistance and feeling as follows. All units in the table are% by weight. This result

The results are shown in Table 2.

The chitosan used in Examples and Comparative Examples was
"Chitosan SK-10": manufactured by Koyo Chemical Co., Ltd .; molecular weight 70,000 to 80,000. The polychlorinated diallyldimethylammonium salt is “Cosmote VG”: manufactured by SENKA CORPORATION; molecular weight of about 2
100,000.

[0029]

As is clear from Table 2, Examples 2 to 6 all exhibited excellent performance.

On the other hand, as can be seen from Comparative Example 8, the effect was not particularly improved even when the blending amount was increased, and on the contrary, the feeling after finishing was worsened.

Examples 7 to 9 The cosmetic for head hair of Example 3 and a commercially available rinse (Ravinas Hair Rinse: manufactured by Kao Corporation) were blended, and the feeling after use was evaluated. All units in the table are% by weight. The result of the feeling

[Table 3] Shown in

[0032]

As is clear from the results shown in Table 3, the product of the present invention can be used alone, but when used in combination with a commonly used hair conditioner, etc., gives the hair a gloss and a good feeling. And the conditioning effect is improved.

[0033]

As described above, the hair cosmetic composition of the present invention is excellent in preventing discoloration of hair dyed with an anionic dye, especially hair dyed with an acid dye, and is also a hair after finishing. It imparts an excellent conditioning effect.

Claims (1)

[Claims] (1) chitosan, poly (diallyldimethylammonium chloride) salt and an organic solvent are contained as an anti-fading agent for hair dyed with an anionic dye.
Hair cosmetics applied to dyed hair.