JPH09255540A - Cream hair dye - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a creamy hair dye that is less likely to be dyed on the scalp, has excellent hair dyeing power and stability, and is hypoallergenic. A lipophilic creamy hair dye containing an acid dye, which has the following general formula: The modified siloxane copolymer represented by is included as an emulsifier. Among such modified siloxane copolymers, particularly preferable ones are dimethylsiloxane / methylcetylsiloxane / methyl (polyoxyethylene / polyoxypropylene) siloxane copolymer (56EO) (68).
P. O. ). In the present invention, the content of the oil phase portion is 15
% To 25%, the content of the aqueous phase portion is 75 to 85%, the aqueous phase portion contains benzyl alcohol, and the blending ratio of the modified siloxane copolymer is 1.5 to 100% of the total amount of the hair dye. 2.
Preferably it is 5% by weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a creamy hair dye which has little dyeing properties on the scalp, has excellent hair dyeing power and stability, and has low irritation.

[0002]

2. Description of the Related Art A conventional hair dye using an acidic dye is one that uses a viscous agent (thickener) such as hydroxyethylcellulose or hydroxypropylcellulose to dye hair with a viscous gel having affinity for the hair. is there. However, like hair, these hair dyes are strongly dyed on the scalp, etc., and are difficult to remove even with shampoos and soaps. There was a problem that it was necessary. Also, when trying to dye near the hair root, it will inevitably adhere to the scalp, resulting in direct irritation by the dye, irritation by the removing solution, physical irritation by wiping, and damage to the scalp or hair. There was fear.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the above-mentioned conventional hair dyes containing an acid dye, is hardly dyed on the scalp, has excellent hair dyeing power and stability, and has low irritation. An object of the present invention is to provide a creamy hair dye.
The present inventor has studied various emulsifiers,
In a hair dye, a modified siloxane copolymer having a specific chemical structure is further added as an emulsifier to an oil phase using ordinary waxes, esters, and other oils, and the mixture is heated and dissolved. After cooling the solution to a specific temperature, acid dyes, dyeing aids such as benzyl alcohol,
By adding the aqueous phase of the purified water and mixing with stirring,
It has been found that a stable lipophilic cream hair dye can be easily prepared, and moreover, this lipophilic cream hair dye has
The present inventors have found that the composition is a good hair dye that is hardly dyed on the scalp and has less irritation, and has completed the present invention.

[0004]

The cream hair dye of the present invention is of a lipophilic type containing an acid dye, wherein the hair dye is an emulsifier represented by the following general formula:

[0005]

[Chemical 1]

It is characterized by containing a modified siloxane copolymer represented by the formula: In the present invention, the creamy hair dye preferably has an oil phase content of 15 to 25%, an aqueous phase content of 75 to 85%, and the aqueous phase contains benzyl alcohol. It is also characterized by. Further, the present invention is also characterized in that the blending ratio of the modified siloxane copolymer is 1.5 to 2.5% by weight of the whole hair dye.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The modified siloxane copolymer contained as an emulsifier in the cream hair dye of the present invention comprises:
Dimethyl siloxane / methyl cetyl siloxane / methyl (polyoxyethylene / polyoxypropylene) siloxane copolymer represented by the above general formula (CTFA name: Ce)
tyl Dimethicone copolyol), and commercially available products can be used. Among the modified siloxane copolymers of the above general formula, particularly preferred are dimethylsiloxane / methylcetylsiloxane / methyl (polyoxyethylene / polyoxypropylene) siloxane copolymer (56EO) (68).
P. O. ), For example, ABIL EM-90 (trade name, manufactured by Goldschmidt). The numerical ranges of a, b, c, X and Y in the above general formula are particularly important. In the case of a modified siloxane copolymer not having each of the numerical values specified in the present invention, good emulsifiability is obtained. Absent.

The modified siloxane copolymer represented by the above general formula has a high emulsifying stability, imparts excellent viscosity to a hair dye with a small amount of addition, and is comfortable and comfortable to hair. Brings a feeling of application. The compounding ratio of the modified siloxane copolymer is preferably 1.5 to 2.5% by weight of the whole hair dye, and when the compounding ratio is extremely smaller than 1.5% by weight, the emulsifying power is reduced. If it is insufficient, and if the mixing ratio is extremely larger than 2.5% by weight, the viscosity becomes too large and a comfortable coating feeling cannot be obtained.

The oil phase (oil) in the cream hair dye of the present invention accounts for 15 to 25% of the total hair dye.
It is composed of raw materials used as the oil phase in the production of ordinary cosmetics, especially cosmetic creams. Specific examples of such oily raw materials include beeswax, liquid paraffin, squalane, paraffin wax, fatty acid esters, and the like. On the other hand, the water phase (moisture) is 75% of the whole hair dye.
The aqueous phase contains benzyl alcohol as a dyeing aid in addition to water, and the blending ratio of benzyl alcohol is preferably about 3 to 6%. The hair dye of the present invention contains an acid dye as a dye for dyeing hair.
% Is preferable. At this time, as the acid dye that can be added to the hair dye of the present invention, various types of dyes that are permitted to be used for coloring cosmetics can be used. It is possible to stain. Further, a usual additive such as a polypeptide may be contained as an additive.

[0010] The creamy hair dye of the present invention does not dye the scalp more strongly even when heated with the hair dye attached to the scalp due to the action of the emulsifier, and furthermore, The attached hair dye can be almost completely removed by washing with a commercially available shampoo or soap. The time required for dyeing the hair with the dye of the present invention is longer than when using an aqueous hair dye, and it is about 1 hour at room temperature and the heating (50 hours).
C), the hair can be uniformly dyed in about 20 minutes.

Since the hair dye of the present invention is oily, it does not dry easily even when exposed to the outside air, and therefore has the advantage that it can be heated without a cap and is easy to handle. Further, since the hair dye of the present invention is oily, it easily adheres to both wet and dry hair, and can be over-dyed, and gradually changes color. Can be performed, and for example, multicolor dyeing such as yellow / red / black can be performed. The hair dye of the present invention is also suitable for easily performing accessory hair dyeing.

In producing the creamy hair dye of the present invention, first, waxes commonly used in hair dyes,
Esters, other oils, and the like, the modified siloxane copolymer of the above general formula is added and dissolved by heating, and the resulting solution is cooled to a temperature of about 50 to 55 ° C., and then an acid dye,
A dyeing aid such as benzyl alcohol and an aqueous phase of purified water are added, and the mixture is stirred and mixed to emulsify. At this time, when a substance other than the emulsifier specified in the present invention is used, not only is it necessary to emulsify at a high temperature, but when the aqueous phase portion is 60% or more, the creamy water-in-oil emulsion can be stabilized. A problem that cannot be obtained. In addition, when the proportion of the oil phase is large, there is also a problem that it is difficult to dye and emulsification at a high temperature is not preferable.

In the case of producing the creamy hair dye of the present invention, sufficient emulsification is required when emulsifying by adding an aqueous phase to an oil phase, but excessive emulsification is required. It must be avoided and, if a secondary structure is formed by over-emulsification, the product has poor stability over time. In order to avoid such a problem, an emulsifying machine which is widely used in the production of cosmetics is used when performing the above emulsification. Hereinafter, examples and use examples will be described in order to more specifically illustrate the present invention.

[0014]

【Example】

Example 1: Preparation example of cream hair dye of the present invention 0.2 parts by weight of methyl paraben, 0.1 of propyl paraben
Parts by weight, 3.0 parts by weight of isopropyl palmitate, 3.0 parts by weight of cetyl isooctanoate, 7 parts by weight of liquid paraffin, 3.0 parts by weight of squalane, modified siloxane copolymer (ABIL EM-90 manufactured by Goldschmidt)
2.0 parts by weight, 3.0 parts by weight of paraffin wax, and 0.5 part by weight of beeswax were heated to 80 ° C. and then melted.
C. and the mixture was added to 5 parts by weight of benzyl alcohol, 4 parts by weight of N-methyl-2-pyrrolidone, 0.5 parts by weight of sodium chloride, 2 parts by weight of citric acid and 0.5 part of acid dye.
Parts by weight, 7.0 parts by weight of 95% ethyl alcohol, and 59.2 parts by weight of purified water dissolved by heating to 50 ° C. are added, and the mixture is uniformly emulsified to obtain the creamy hair dye (I) of the present invention. Obtained.

Example 2: Preparation example of cream hair dye of the present invention 0.2 parts by weight of methyl paraben, 0.1 of propyl paraben
Parts by weight, 2.0 parts by weight of isopropyl myristate, 3.5 parts by weight of cetyl isooctanoate, 13 parts by weight of liquid paraffin, 2.5 parts by weight of a modified siloxane copolymer (ABILEM-90 manufactured by Goldschmidt), paraffin wax 3.5 parts by weight and 1.0 part by weight of beeswax are heated and melted to 85 ° C., then cooled to 55 to 50 ° C., and the mixture is mixed with 4 parts by weight of benzyl alcohol, 6 parts by weight of N-methyl-2-pyrrolidone, 1.0 parts by weight of sodium chloride, 0.8 parts by weight of phosphoric acid (85%), 0.6 parts by weight of acid dye, 95 parts by weight
A solution obtained by heating and dissolving 7.0 parts by weight of ethyl alcohol and 55.8 parts by weight of purified water to 50 ° C. was added and emulsified uniformly to obtain a creamy hair dye (II) of the present invention.

Comparative Example: Preparation Example of Conventional Aqueous Gel Hair Dye Containing Acid Dye 0.1 parts by weight of methyl paraben was dissolved in 53.9 parts by weight of purified water at 85 ° C., and hydroxyethyl cellulose 2.0 was added thereto. A part by weight was added with stirring to form a highly viscous gel, which was allowed to cool to room temperature. Add benzyl alcohol to this.
0 parts by weight, 7.0 parts by weight of N-methyl-2-pyrrolidone,
A dye solution of 0.5 parts by weight of phosphoric acid (85%), 0.5 parts by weight of an acid dye, 8.0 parts by weight of ethyl alcohol, and 23.0 parts by weight of purified water is mixed to obtain an aqueous gel hair dye. Obtained.

The creamy hair dye of the present invention obtained in Examples 1 and 2 and the conventional hair dye of Comparative Example were (1) hair dyeing power, (2) scalp dyeing degree, and (3) ) Stability tested. The test results are shown below.

(1) Hair dyeing strength test The hair dyes (I) and (II) of the present invention and a conventional hair dye were applied to small hair bundles which had been washed in advance with a commercially available shampoo and air-dried. , Covered with polyethylene sheet, 50 ℃
After being immersed in a hot water bath for 20 minutes and heated, it is further washed twice with a shampoo and air-dried.

Experimental Results The above hair dye test was carried out. As a result, in the case of the cream hair dyes (I) and (II) of the present invention, the hair can be dyed softly and the hair dyeing power was sufficient. It was confirmed to have. On the other hand, in the case of the gel hair dye described in the comparative example, it was confirmed that the hair dyed deeper than the hair dye of the present invention under the above hair dyeing conditions. However, the hair dyes (I) and (II) of the present invention can also dye hair to the same thickness as the hair dye of the comparative example. Time was needed.

(2) Scalp Dyeing Test Using the inside of the wrist as a substitute, each of the hair dyes is applied in a range of about 20 mm in diameter at intervals and a polyethylene sheet is applied. And heat to about 50 ° C with a dryer for about 5 minutes. Then, it is washed with a commercially available shampoo and soap for 3 minutes each.

Experimental Results a) In the case of shampoo washing Most of the cream hair dyes (I) and (II) of the present invention fell off by shampoo washing, but the gel hair dye of the comparative example was almost completely dermal. Did not fall from b) In the case of soap washing The cream hair dyes (I) and (II) of the present invention were completely removed by the soap washing, but the gel hair dye of the comparative example mostly remained on the skin. From these experimental results, it was confirmed that each of the creamy hair dyes (I) and (II) of the present invention has almost no dyeing property on the scalp.

(3) Stability test The hair dyes (I) and (II) of the present invention were used at 5 ° C and 50 ° C.
Were stored at the same temperature for 7 days, and the stability with time was observed. As a result, no change in the properties was observed. Also, when the hair dyes (I) and (II) of the present invention are directly put in water and boiled, the boiling water is slightly colored, the cream condition does not change, and the temperature and water Was confirmed to be extremely stable.

Next, an example of a method for dyeing hair using the cream hair dye of the present invention will be described. First, the hair is washed with a normal shampoo and then dried with a towel or a drier depending on the hair quality. Then take the hair dye on the comb and gently comb it so that it does not bounce. Repeat the comb and apply evenly to the whole hair. Especially on the forehead and temple hairline, apply it enough to reach the scalp. At this time, the larger the amount of application to the hair, the better the dyeing does not occur. It is sufficient that the hair is applied in the manner of hair styling, and depending on the amount of hair, about 15 g is sufficient for ordinary short hair. Cover the entire coated hair with two Saran films and keep warm with a towel and cap. The standing time should be at least 40 minutes at room temperature, and the longer the time, the better the dyeing, and the standard is about 1 hour. Heating (50 ° C.) takes about 20 minutes. In this case, too, the longer the time, the better the dyeing. Rinse the hair dye as much as possible while applying hot water (the higher the temperature, the easier it will run off) and then wash the hair with a shampoo. Wash your hair twice. Since the hair dye of the present invention is oily, it can give a moist feeling and the hair after shampooing has a supple feeling. However, depending on the hair quality, a rinsing agent or a hair treatment agent is used.

[0024]

The creamy hair dye of the present invention contains a modified siloxane copolymer, which has particularly excellent emulsifying power, as an emulsifier, and therefore has excellent emulsion stability and is dyed to the scalp. Despite its low activity, it has excellent dyeing power to hair and has the advantage of being hypoallergenic.
Also, since the hair dye of the present invention is oily, it can be easily applied to hair, can uniformly dye hair with a small amount of application, and can be over-dyed, so it is also suitable for multicolor dyeing. ing.

Claims (3)

[Claims] 1. A lipophilic cream-like hair dye containing an acid dye, wherein the hair dye is an emulsifier represented by the following general formula: A hair dye cream containing the modified siloxane copolymer represented by the formula: 2. The creamy hair dye has an oil phase content of 15 to 25% and an aqueous phase content of 75 to 85.
%, And said aqueous phase contains benzyl alcohol. 3. The creamy dye according to claim 1, wherein the blending ratio of the modified siloxane copolymer is 1.5 to 2.5% by weight of the whole hair dye. Hair agent.