JPS635003B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a hair cosmetic that has excellent spreadability during use and imparts excellent smoothness to hair. Normally, hair is covered with animal and vegetable oils such as hair creams and hair oils, as well as sebum secreted from the hair itself, but when hair is washed with soap or synthetic detergents, these oils and fats are removed more than necessary. . As a result, the hair after washing loses its smoothness and feels dry and stiff, making it difficult to comb through the hair, making it more likely to cause split ends and split ends. In order to eliminate such inconveniences, various hair cosmetics have been developed and used as hair treatment agents after hair washing. These hair cosmetics contain quaternary ammonium salts such as dialkyldimethylammonium chloride and alkyltrimethylammonium chloride as the main active ingredient. There are two types of ammonium salts: those that are poorly soluble in water and those that are easily soluble in water.Therefore, hair cosmetics are divided into ``rinsing type'' and ``non-rinsing type''. This makes their usage patterns different. In order to prevent hair from squeaking and tangling after washing, etc., and to improve the finish when dry, the above ammonium salt must be adsorbed to the hair. However, conventional hair cosmetics have problems in dispersion and adsorption of the ammonium salt, regardless of the form of use, and are not fully satisfactory. especially,
The elongation during use and the smoothness of the hair when finished were extremely inadequate. The present invention was made under the above circumstances, and an object of the present invention is to provide a hair cosmetic that has excellent spreadability during use and imparts excellent smoothness to hair. That is, the hair cosmetic of the present invention comprises one or more lower alkyl ester salts (m) of mono-N-long chain acyl basic amino acids, and

[Formula] (In the formula, R ₁ is an alkyl group having 12 to 22 carbon atoms, R ₂ is -CH ₂ COOX or -
CH ₂ CH ₂ SO ₃ X, where X is H, Na or K. ) containing one or more types of anionic surfactants (n) represented by
is 1/5 to 10/1, and the blending amount (m+n) is
It is characterized by a content of 0.1 to 15% by weight. Hereinafter, the hair cosmetic of the present invention will be explained in detail. As the lower alkyl ester salt of a mono-N-long chain acyl basic amino acid which is the first essential component of the present invention, those shown in ``Japanese Patent Publication No. 51-22055'' are used. That is, the basic amino acid component is
In addition to natural amino acids such as ornithine, lysine, and arginine, they are synthetic amino acids such as α,γ-diaminobutyric acid, and these may be either optically active or racemic. The acyl group is a saturated or unsaturated natural or synthetic fatty acid residue having 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms, such as lauroyl group, myristyl group, palmitoyl group, stearoyl group, etc. In addition to single fatty acid residues, there are natural mixed fatty acid residues such as coconut oil fatty acid residues and bovine fatty acid residues. Suitable lower alkyl ester components include methyl ester, ethyl ester, propyl ester, butyl ester, pentyl ester, hexyl ester, heptyl ester, and octyl ester. Salts of mono-N-long chain acyl basic amino acid esters include inorganic acid salts such as hydrochloride, sulfate, acetate, tartrate, citrate, P-toluenesulfonate, fatty acid salt, etc. Organic acid salts such as salts, acidic amino acid salts, and pyroglutamic acid salts are used; among these, acidic amino acid salts are preferred because they can be expected to have a nutritional effect on the hair, and they also act as humectants.
DL- or optically active pyroglutamate is preferred. The effects of the present invention cannot be obtained using only the ester salts described above. Therefore, the hair cosmetic of the present invention can achieve the effects of the present invention by blending this ester salt with a highly safe anionic surfactant as a second essential ingredient to form a complex. We have achieved the ability to provide elongation and smoothness to hair during certain uses. This second essential component of the present invention has the general formula

[Formula] (wherein, R is an alkyl group having 12 to 22 carbon atoms, R ₂ is -CH ₂ COOX or -
CH ₂ CH ₂ SO ₃ X, where X is H, Na or K. ) is an anionic surfactant represented by
Such anionic surfactants include lauroylsarcosine, myristoylsarcosine, palmitoylsarcosine, stearoylsarcosine,
Beheroylsarcosine, N-cocoylmethyltaurine, N-myristoylmethyltaurine, N-palmitoylmethyltaurine, N-stearoylmethyltaurine, N-beheroylmethyltaurine,
and their salts. These anionic surfactants can be used alone or in a mixture of two or more. Particularly preferred among these surfactants are N-myristoylmethyltaurine soda, N-lauroylmethyltaurine, lauroylsarcosine, and the like. The blending amount of the anionic surfactant is preferably 0.05 to 5% by weight, more preferably 0.1 to 3% by weight based on the total hair cosmetic composition. In the hair cosmetic of the present invention, the weight ratio of the mono N-long chain acyl basic amino acid lower alkyl ester salt and the anionic surfactant is 1/5 to 10/
Must be within the range of 1. Moreover, the preferable range is 1/4 to 4/1. This weight ratio is 1/5
If it is less than this, the adsorption of the hair cosmetic to the hair will deteriorate, and the ability to impart smoothness to the hair will not be exhibited, which is not preferable. On the other hand, the above weight ratio is 10/1
If it exceeds this range, the hair cosmetic will not elongate when used. The total amount of both components is 0.1 to 15% by weight, preferably 0.1 to 10% by weight. If it is less than 0.1% by weight, the effect of the present invention will not be exhibited, and if it exceeds 15% by weight, the smoothness of the hair will deteriorate, which is not preferable. The hair cosmetic of the present invention may contain other optional ingredients within a range that does not affect the effects of the present invention. Such optional ingredients include the following substances: Monoalkyl-type or sialkyl-type quaternary ammonium salts such as stearyltrimethylammonium chloride, hydrogenated tallow alkyltrimethylammonium chloride, eicosyltrimethylammonium chloride, heneicosyltrimethylammonium chloride; alginate propylene glycol ester, alginate sodium, algae Colloids, pyroglutamic acid monostearin, pyroglutamic acid monoolein, higher fatty acids, oxycarboxylic acids, and the following general-purpose ingredients can also be blended. Hydrocarbons such as petrolatum and olefin oligomers; esters such as isopropyl myristate, isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate and 2-ethylhexanoic acid triglyceride; cetanol, stearyl alcohol,
Higher alcohols such as cetostearyl alcohol, behenyl alcohol and hexyldecanol;
Emulsifiers such as glyceryl monostearate, sorbitan monopalmitate, polyoxyethylene cetyl ether, polyoxyethylene stearate and polyoxyethylene sorbitan monolaurate; cellulose derivatives such as methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose and cationized cellulose thickeners such as natural polymers; humectants such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin and sorbitol; and other small amounts of ingredients such as solvents, disinfectants, and fragrances. The hair cosmetic composition of the present invention can be used in various hair treatment applications such as a hair rinse, a spray-type or dispenser-type hair conditioner, and a hair lotion. The hair cosmetic of the present invention exhibits excellent hair elongation and smoothness when applied to both "rinsing type" and "non-rinsing type". Next, Examples and Comparative Examples of the present invention will be shown to explain the effects of the present invention more specifically. Before explaining each example, the test method adopted in each example will be explained. Test method Comparative examples and examples were compared and evaluated using the half-head method on 20 women (18 to 25 years old) regarding the elongation of the samples during use and the smoothness of the hair when finished. The evaluation criteria were 1.0% by weight of stearyltrimethylammonium chloride,
This is a four-level evaluation based on the evaluation obtained using a sample (evaluation standard example) consisting of 50% by weight of propylene glycol and water (the balance). Evaluation criteria Compared to the evaluation standard example: 15 or more people is good ◎ 〃 10 to 15 people is good 〇 〃 5 to 10 people is good △ 〃 0 to 5 people is good × In addition, all compounding amounts in each test example are weight% It is indicated by. Test Example Eleven types of hair cosmetics shown in Table 1 below were prepared and their performance was tested. The results are shown in the same table.

【table】

[Table] 1 ^* Comparative Example 1 is an example of evaluation criteria.
As is clear from Table 1, all hair cosmetics (Comparative Examples 1 to 5) that do not contain mono N-long chain acyl basic amino acid lower ester salt and/or anionic surfactant are used. On the other hand, the hair cosmetics of the present invention (Examples 1 to 6) containing both components all satisfy the above characteristics. Test Example 2 Ten types of hair cosmetics shown in Table 2 below were prepared,
Their performance was tested. The results are shown in the same table.

[Table] As is clear from Table 2, all hair cosmetics (Comparative Examples 6 to 9) in which the weight ratio of amino acid ester salt to anionic surfactant is outside the range of the present invention show the effects of the present invention. do not have. Test Example 3 Two types of hair cosmetics having the formulation shown in Table 3 below were prepared and their performance was tested. The results are shown in the same table.

【table】

[Table] As is clear from Table 3, the hair cosmetic (Comparative Example 10) that does not contain lauroyl sarcosine (anionic surfactant) does not exhibit the effects of the present invention. Test Example 4 A hair cream composition having the composition shown below was prepared and its performance was evaluated. This hair cream composition showed unprecedented excellent hair extension, gave smoothness to the hair, and was free from stickiness. There was nothing.

【table】

[Table] Test Example 5 When we prepared an aerosol type hair conditioner with the composition shown below and evaluated its performance, we found that this hair conditioner showed unprecedented excellent spreadability and smoothness on the hair. I gave you a feeling.

【table】

Claims (1)

[Scope of Claims] 1. One or more lower alkyl ester salts (m) of mono-N-long chain acyl basic amino acids;
General formula [Formula] (In the formula, R ₁ is an alkyl group having 12 to 22 carbon atoms, R ₂ is -CH ₂ COOX or -
CH ₂ CH ₂ SO ₃ X, where X is H, Na or K. ) containing one or more types of anionic surfactants (n) represented by
is 1/5 to 10/1, and the blending amount (m+n) is
A hair cosmetic containing 0.1 to 15% by weight.