JP5764053B2 - Hair cosmetics - Google Patents

Description

  The present invention relates to a hair cosmetic.

  Hair cosmetics such as rinses, conditioners and treatments are used to improve the feel of the hair after shampooing. In these hair cosmetics, a dosage form in which a cationic surfactant, an aliphatic alcohol, an oil or the like is blended and emulsified in a gel form is mainly used. Patent Document 1 describes a hair cosmetic that uses a specific amidoamine as a cationic surfactant and is blended with an organic acid and a higher alcohol. This hair cosmetic contains a large amount of amide amines, specifically those having a fatty acid residue having 20 or more carbon atoms (C20) or more, especially those having 22 (C22) fatty acids.

JP 2006-290796 A

  In the technique described in Patent Document 1 described above, as a conditioner or the like, smoothness and flexibility are imparted to the hair, but there is still room for improvement in that the hair after drying becomes sticky and a residual feeling remains.

  By the way, in the same literature, it has a structure containing many fatty acid residues having 20 or more carbon atoms (C20) or more as amidoamines, and especially those having fatty acid residues having 22 (C22) carbon atoms are 50% by weight or more. It has become. A large amount of C22 fatty acid is contained in rapeseed oil, and amidoamine having a C22 fatty acid residue is also industrially produced.

  On the other hand, according to the study of the present inventor, no amidoamine having a C20 fatty acid residue has been studied in detail so far among the amidoamines having a C20 or higher fatty acid residue. As this reason, it is guessed that there is almost no thing which contains many C20 fatty acids in fats and oils derived from a plant. C20 fatty acids are contained in a relatively large amount in fish oil and shark liver oil, but these oils may be unpleasant in smell and contain C24 fatty acids having a long chain length. For this reason, when an amidoamine is produced using a fatty acid derived from fish oil or shark liver oil, a product having favorable properties in terms of the solubility and surface active ability of the amidoamine and the smell of the obtained amidoamine is obtained. There were concerns that could not be met.

  The present invention provides a hair cosmetic that has both a moist feeling and a smooth feeling while suppressing stickiness and residual feeling, and is particularly excellent in stability at high temperatures.

According to the present invention,
The following components (A), (B), (C):
(A) Amidoamine represented by the following general formula (I)

(In the general formula (I), R ¹ represents an aliphatic hydrocarbon group.)
(B) an organic carboxylic acid (C) containing an aliphatic alcohol having 8 to 30 carbon atoms and water,
The proportion of amidoamine in which R ¹ CO in the general formula (I) is a fatty acid residue having 20 carbon atoms is 51 to 99% by mass with respect to the whole component (A),
Wherein in the component (A), R ¹ CO in the general formula (I) are fatty acid residues of R ¹ CO is carbon 22 in the amido-amine and the general formula which is the fatty acid residue of 20 carbon atoms (I) There is provided a hair cosmetic composition having a mass ratio of [amidoamine having a fatty acid residue having 20 carbon atoms] / [amidoamine having a fatty acid residue having 22 carbon atoms] to 100 or less with a certain amidoamine.

  According to the present invention, it is possible to obtain a hair cosmetic composition that has both a moist feeling and a smooth feeling while suppressing stickiness and residual feeling, and is particularly excellent in stability at high temperatures.

The aqueous hair cleanser in the present invention includes the following components (A) to (C) and water:
(A) Amidoamine represented by the following general formula (I)

(In the general formula (I), R ¹ represents an aliphatic hydrocarbon group.)
(B) Organic carboxylic acid (C) C8-C30 aliphatic alcohol Hereinafter, each of components (A)-(C) will be described with specific examples. Each component can be used alone or in combination of two or more.

(Ingredient (A))
The amidoamine of component (A) is represented by the above general formula (I). In the general formula (I), R ¹ represents an aliphatic hydrocarbon group. That is, R ¹ CO represents a fatty acid residue.
In the general formula (I), R ¹ has, for example, 11 or more carbon atoms, preferably 15 or more carbon atoms, more preferably 17 or more carbon atoms, from the viewpoint of improving the surface activity. There is no particular restriction on the upper limit of R ^1, from the viewpoint of improving the solubility of the amidoamine, for example, at 21 or less.

The hair cosmetic composition of the present invention contains a plurality of amidoamines having different carbon numbers for R ¹ as the component (A). Specifically, as component (A), fatty acid residue of the general formula and amidoamine R ¹ CO is a fatty acid residue of 20 carbon atoms in (I), R ¹ CO is carbon 22 in the general formula (I) And an amidoamine as an essential component. Further, as the component (A), R ¹ CO in the general formula (I) mainly contains amidoamine, which is a fatty acid residue having 20 carbon atoms, that is, contains 51% by mass or more.
Hereinafter, the ratio of each amidoamine blended as the component (A) will be described more specifically.

Specifically, the ratio of amidoamine in which R ¹ CO in the general formula (I) is a fatty acid residue having a carbon number of 20 is effective for the overall stickiness after drying with respect to the whole component (A) in the hair cosmetic composition. From the viewpoint of improving the stability of the gel at a high temperature of about 50 ° C. while suppressing, it is 51% by mass or more, preferably 55% by mass or more, more preferably 60% by mass or more, and even more preferably 75% by mass. That's it.
In addition, from the viewpoint of effectively obtaining conditioning characteristics that suppress both stickiness after drying and can achieve both moist and smooth feeling, R ¹ CO in the general formula (I) for the entire component (A) is a residue of 20 fatty acids. The proportion of amidoamine as a group is 99% by mass or less, preferably 98% by mass or less, more preferably 97% by mass or less, and still more preferably 95% by mass or less.

In component (A), R ¹ CO in general formula (I) is a fatty acid residue having 20 carbon atoms and amidoamine in which R ¹ CO in general formula (I) is a fatty acid residue having 22 carbon atoms; Mass ratio, that is, [amidoamine having a fatty acid residue having 20 carbon atoms] / [amidoamine having a fatty acid residue having 22 carbon atoms] is preferably 1.1 or more, more preferably 1.5 or more, More preferably, it is 2 or more, and more preferably 2.5 or more. By carrying out like this, the stability of the gel in about 50 degreeC can be improved. Further, from the viewpoint of improving the balance between high temperature stability and moist feeling of the gel, [amidoamine having 20 fatty acid residues] / [amidoamine having 22 fatty acid residues] in component (A) Is 100 or less, preferably 75 or less, more preferably 50 or less.

In addition, the ratio of the amidoamine in which R ¹ CO in the general formula (I) is a fatty acid residue having 22 carbon atoms with respect to the whole component (A) in the hair cosmetic composition is from the viewpoint of more stably obtaining the surface active ability. For example, it is 1% by mass or more, preferably 2% by mass or more, more preferably 3% by mass or more, and still more preferably 5% by mass or more.
From the viewpoint of further improving the high temperature stability of the gel, the ratio of amidoamine in which R ¹ CO in the general formula (I) is a fatty acid residue having 22 carbon atoms with respect to the entire component (A) is 49% by mass or less. Preferably, it is 45 mass% or less, More preferably, it is 40 mass% or less, More preferably, it is 25 mass% or less.

Moreover, the ratio of the amide amine whose R < ¹ > CO in general formula (I) is a C20 fatty acid residue with respect to the whole component (A), and R < ¹ > CO in general formula (I) is a C22 fatty acid residue From the viewpoint of improving the balance between the surface activity and the high temperature stability of the gel, the total of the ratio of amidoamine is, for example, 60% by mass or more, preferably 75% by mass or more, more preferably 90% by mass or more. is there.
Incidentally, R ¹ CO is not particularly limited to the upper limit of the total percentage of fatty acid residues of 20 or 22 carbon atoms, but at most 100% by weight with respect to the total components (A), the production efficiency of the component (A) For example, 98% by mass or less may be used.
Component (A), to R ¹ CO in the general formula (I) may be composed of fatty acid residues of 20 and 22 carbon atoms, R ¹ CO in the general formula (I) is other than 20 and 22 carbons It may further contain a number of fatty acid residues.

The content of the component (A) in the hair cosmetic is, for example, 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more, from the viewpoint of stably obtaining the conditioning effect. It is.
Moreover, from a viewpoint of improving the stability of the system in hair cosmetics, it is 20 mass% or less, for example, Preferably it is 5 mass% or less, More preferably, it is 3 mass% or less.

The component (A) is obtained by synthesis by, for example, an amidation reaction using a fatty acid having a predetermined carbon number and an amine as raw materials. Specifically, 3-dimethylaminopropylamine (DMAPA: (CH ₃ ) ₂ NC ₃ H ₆ NH ₂ )) is used as the amine compound. In addition, as the fatty acid, a linear saturated fatty acid having 20 to 22 carbon atoms is preferably used, and examples thereof include arachidic acid (carbon number 20) and behenic acid (carbon number 22). These compounds are available as reagents.

Moreover, the fatty acid which comprises a component (A) may be a fatty acid derived from algae. That is, the component (A) may be an amidoamine synthesized using algae-derived fatty acid as a raw material.
Since fatty acids produced by algae contain a relatively large number of carbon atoms having 20 or 22 carbon atoms, they can be suitably used as a raw material for component (A). In addition, the fatty acids produced by algae do not include those having 24 carbon atoms, or the ratio of those having 24 carbon atoms is small, so that the amidoamine obtained using this has excellent solubility and surface activity, It is also preferable in that the undesirable odor derived from the fatty acid raw material is suppressed.

  Specific examples of algae producing a fatty acid having 20 or 22 carbon atoms include Eustigmatophyta N.sp, Eustigmatophyta M.s, Chlorophyta P.i, Cryptophyta H.b, Dinophyta G.s, Dinophyta S.sp and the like. Among the fatty acids produced by these algae, those having 24 carbon atoms are very few, so that the undesirable odor of the resulting amidoamine can be suitably suppressed.

(Ingredient (B))
Specific examples of the organic carboxylic acid of component (B) include those having 10 or less carbon atoms, preferably 2 to 8 carbon atoms, and more specifically, hydroxycarboxylic acids such as hydroxymonocarboxylic acids and dicarboxylic acids. Can be mentioned. Specific examples of the hydroxy monocarboxylic acid include glycolic acid, lactic acid, glyceric acid, gluconic acid, pantothenic acid and the like. Specific examples of the dicarboxylic acid include malic acid, tartaric acid, oxalic acid, malonic acid, maleic acid, succinic acid, glutaric acid and the like. Above all, from the point of moisturizing and softening effect on the hair, moist feeling after drying, and the effect of repairing / suppressing hair damage (for example, cavities inside the hair) due to coloring, perm, dryer drying, etc. Glycolic acid, lactic acid, malic acid, tartaric acid and maleic acid are preferred, and lactic acid and malic acid are more preferred.

  The content of the component (B) is, for example, 0.1% by mass or more and 0.2% by mass in the hair cosmetic composition of the present invention from the viewpoint of improving the glossiness of the hair and improving the moist feeling after drying. The above is preferable. Further, from the viewpoint of suppressing the residual feeling, the content of the component (B) is, for example, 5% by mass or less in the hair cosmetic composition of the present invention, preferably 3% by mass or less, and 2% by mass or less. More preferably.

In addition, the mass ratio (A) / (B) of the component (A) to the component (B) in the aqueous hair cleansing agent according to the present invention is the richness of the hair when touched with wet hands, the hair after drying From the viewpoint of improving the balance between moist feeling, smooth feeling, and gloss and unity, it is, for example, 1 to 20, preferably 2 to 10, and more preferably 3 to 7.
The rich feeling is a feeling when the hair cosmetic spreads over and adheres to the hair when wet, and refers to a sticky or moist feeling when wet.

  In the present invention, the organic acid salt of amidoamine represented by the general formula (II) may be formed in advance by the component (B) and the component (A) and then contained in the hair cosmetic.

(Ingredient (C))
Specific examples of the aliphatic alcohol having 8 to 30 carbon atoms of the component (C) include those having 10 to 26 carbon atoms, and more specifically, a linear alkyl group or alkenyl group having 10 to 26 carbon atoms or branched. Examples include aliphatic alcohols having a chain alkyl group. Among these, aliphatic alcohols having a linear alkyl group having 10 to 26 carbon atoms, preferably 14 to 24 carbon atoms are preferable. Examples of such alcohols include cetyl alcohol, stearyl alcohol, aralkyl alcohol, and behenyl alcohol. Cetyl alcohol and stearyl alcohol are preferable, and stearyl alcohol is more preferable. Moreover, it is preferable that the ratio of the aliphatic alcohol which has a linear alkyl group is 80% or more in the whole component (C) from the point of the fingering property at the time of apply | coating to hair, and smoothness. Thereby, thickening (gel formation property) improves further and favorable application | coating performance is obtained.

  The content of the component (C) is, for example, 0.3% by mass or more and 0.5% by mass or more in the hair cosmetic composition of the present invention from the viewpoint of forming a smooth gel from the time of application to the time of rinsing. It is preferable. Further, from the viewpoint of the stability of the gel formed and the ease of adjusting the viscosity at the time of use, the content of the component (C) is, for example, 30% by mass or less and 20% by mass in the hair cosmetic composition of the present invention. It is preferable to set it as follows, it is more preferable to set it as 15 mass% or less, and it is still more preferable to set it as 10 mass% or less.

  Moreover, content of water is 45-99.5 mass% in the hair cosmetics in this invention, for example, 50-98 mass% is preferable and 60-95 mass% is more preferable. The water content can be the balance of the components (A) to (C).

  The hair cosmetic composition in the present invention can be produced according to a conventional method. For example, it can be obtained by using components (A) to (C), water, and other components as necessary, and blending them in a predetermined order. An aqueous solution, an ethanol solution, an emulsion, a suspension, a gel, A desired dosage form such as liquid crystal, solid, aerosol foam, or spray can be obtained.

Since the hair cosmetic composition of the present invention contains components (A) to (C), it has excellent conditioning performance and is excellent in gel stability at about 50 ° C.
In particular, in the present invention, the component (A) mainly contains an amidoamine having a C20 fatty acid residue that has not been studied in detail, and the [amidoamine having a C20 fatty acid residue] in the component (A). ] / [Amidoamine having a fatty acid residue of 22 carbon atoms] is configured to satisfy a specific numerical range. Thereby, a component (A) forms a stable gel with a component (B), (C) and water, and can make the external appearance of a gel uniform from room temperature to high temperature, for example. Moreover, the stability of the gel especially at about 50 ° C. can be effectively increased. The reason for this is that an amidoamine having a C20 fatty acid residue and an amidoamine having a C22 fatty acid residue are used in combination, and by setting these formulations within the specific ranges described above, an amidoamine having a fatty acid residue of each carbon number It is presumed that the crystallization of amidoamine is effectively suppressed as compared with the case where is used alone. Moreover, it becomes possible to improve the manufacturing efficiency of a component (A) in addition to the said effect by using the fatty acid derived from algae as a raw material of an amidoamine.
And, by using the component (A) in combination with the components (B) and (C), in the conditioning performance, stickiness and residual feeling after drying are suppressed, and both moist feeling and smooth feeling are compatible. Is obtained.

  The hair cosmetic composition in the present invention may contain components other than components (A) to (C) and water. Specific examples of other components are shown below.

(Component (D))
Component (D) is polydimethylsiloxane. Specific examples of polydimethylsiloxane include those represented by general formula (III).
R ³ (CH ₃ ) ₂ SiO — [(CH ₃ ) ₂ SiO] _a —Si (CH ₃ ) ₂ R ³ (III)
(In the general formula (III), R ³ represents a methyl group or a hydroxyl group, and a represents a number of 10 to 20000.)

When R ³ in the general formula (III) is a methyl group, a is 500 to 10,000, especially 1,000 to 5,000 is preferred.

Various polydimethylsiloxanes can be used as the component (D), but commercially available products include DOW CORNING TORAY BY11-026, BY11-039, BY22-060 (manufactured by Toray Dow Corning), KF-9008, and KF-9013. (Manufactured by Shin-Etsu Chemical Co., Ltd.).
Specifically, it is shown by the following general formula (IV).
_{(CH 3) 3 SiO - [} (CH 3) 2 SiO] b -Si (CH 3) 3 (IV)
(In the general formula (IV), b represents a number of 100 to 20000.)

  As the component (D), those dissolved or dispersed in liquid oil (for example, low-polymerized polydimethylsiloxane oil, liquid silicone oil such as cyclic silicone, or liquid hydrocarbon oil such as isoparaffin) can be used.

  Content of a component (D) can be 0.01-10 mass% in the hair cosmetics of this invention from a viewpoint of improving the slip of hair. Especially, it is preferable to set it as 0.05-8 mass% from the point of the improvement of a favorable conditioning effect, stability, etc., and it is more preferable to set it as 0.1-6 mass%. Especially, it is still more preferable to set it as 0.2-4 mass%.

The mass ratio (A) / (D) of the component (A) and the component (D) is, for example, 0.1 to 20, from 0.5 to 10, from the viewpoint of balance between imparting smoothness and suppressing stickiness. It is preferable to do it, and it is still more preferable to set it as 1-4.
By using the component (D) together with the components (A) to (C), the stability of the hair cosmetic can be further improved.

(Ingredient (E))
Component (E) is a branched fatty acid represented by the following general formula (II) or a salt thereof.
^{_{CH 3 -CHR 2 - (CH 2}} ) r COOH (II)
(In the general formula (II), R ² represents a methyl group or an ethyl group, and r represents an integer of 3 to 26.)

  Among such branched fatty acids, those having r of 14 to 20 (total carbon number 18 to 25) in the general formula (II) are preferable, and those having r of 16 to 20 (total carbon number 20 to 25) are further included. preferable.

  Specifically, as component (E), 18-methyleicosanoic acid, 14-methylpentadecanoic acid, 14-methylhexadecanoic acid, 15-methylhexadecanoic acid, 15-methylheptadecanoic acid, 16-methylheptadecanoic acid, Examples thereof include 16-methyloctadecanoic acid, 17-methyloctadecanoic acid, and 17-methylnonadecanoic acid. The branched fatty acid salts include alkali metal salts such as sodium salt, lithium salt and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; ammonium salt; triethanolamine salt, diethanolamine salt and monoethanol. Examples include alkanolamine salts such as amine salts; basic amino acid salts such as lysine salts and arginine salts.

  The component (E) can be separated and extracted from hair and the like according to the description in, for example, LIPIDS, vol.23, No.9, 878-881 (1988), International Publication WO98 / 30532 pamphlet. It can also be synthesized according to the description in Japanese Patent No. 4-173719.

  Examples of the extract include an extract from lanolin, that is, a lanolin fatty acid and a salt thereof. Commercially available lanolin fatty acids contain about 50% by mass of methyl branched long chain fatty acids called isofatty acids and anteisofatty acids. Specific examples include Crodacid 18-MEA (manufactured by Croda Japan), Scrairo (manufactured by Croda Japan), and FA-NH (manufactured by Nippon Seika Co., Ltd.).

  As the component (E), two or more kinds may be used in combination, or a synthetic product and an extracted product may be used in combination. The content of the component (E) is preferably 0.01 to 10% by mass in the hair cosmetic composition of the present invention, from the viewpoint of the effect of recovering or suppressing hair damage, and 0.1 to 4% by mass. More preferably.

The mass ratio (A) / (E) of the component (A) and the component (E) is 0.2 to 20 from the viewpoint of moist feeling after drying and the effect of restoring or suppressing hair damage. Preferably, it is 1-10, more preferably 2-8.
By using the component (E) together with the components (A) to (C), the stability of the hair cosmetic can be further improved.

  The hair cosmetic composition of the present invention may contain a surfactant other than the component (A). Specific examples include anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants. When used in conditioners, hair rinses, treatments, etc., it is preferable to use cationic surfactants. .

  Furthermore, the hair cosmetic composition of the present invention may contain silicones and oils other than the above component (D) depending on the purpose, for example, to further improve the feel to the hair composition of the present invention. Good.

  In addition, as other components, polymer compounds such as cationic polymers, polysaccharides, polypeptides; higher fatty acid esters; higher fatty acids; humectants such as glycerin, propylene glycol, dipropylene glycol; zinc pyrithione, benzalkonium chloride Anti-dandruff agents such as piroctone olamine; vitamins; bactericides; anti-inflammatory agents; antiseptics; chelating agents; feel-improving agents; viscosity modifiers such as thickeners; Examples include pearlizing agents; fragrances; ultraviolet absorbers; visible light absorbers; antioxidants; preservatives;

From the viewpoint of improving the moist feeling, dry feeling, gloss, and unity after drying, the hair cosmetic composition of the present invention has a pH when applied to hair, specifically 25 ° C. when diluted 20 times with water. The pH measured at is preferably 2 to 5, more preferably 3 to 5.
In addition, pH adjustment of hair cosmetics can be performed using the organic carboxylic acid of a component (B). Moreover, bases, such as sodium hydroxide, potassium hydroxide, ammonium chloride, etc. are mentioned as another pH adjuster, These may be used together with a component (B).

  The hair cosmetic composition of the present invention can be made into a desired form such as an aqueous solution, an ethanol solution, an emulsion, a suspension, a gel, a liquid crystal, a solid, an aerosol, etc., for example, a hair rinse, a hair treatment, a hair pack, a hair cream, a conditioning mousse, Applicable to hair mousse, hair spray, leave on treatment, etc. It is particularly suitable as a dosage form to be used after washing away, such as hair rinse, hair conditioner, hair treatment.

  It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

  In the following Examples and Comparative Examples, “parts” means “parts by mass” and “%” means “% by mass” unless otherwise specified. Moreover, content in Table 1 is a value when the active ingredient of each component is 100%.

(Examples 1-7, Comparative Examples 1-5)
Hair cosmetics (conditioners) shown in Table 1 were prepared by a conventional method and evaluated by the following evaluation methods. The results are also shown in Table 1. The pH is a value obtained by diluting each composition 20 times by mass with water and measuring at 25 ° C.

(Evaluation method)
(1) Temperature stability of sample Each sample obtained in Examples and Comparative Examples was stored at 5 ° C, 25 ° C and 50 ° C for 2 weeks, and the stability of the sample gel after storage was measured with an optical microscope ( Using ECLIPSE E800 (manufactured by NIKON), observation was performed at room temperature under polarization conditions (crossed Nicols). Further, visual appearance observation was also performed. The evaluation criteria are as follows.

(Observation of gel with polarizing microscope: after storage for 2 weeks)
1: No crystal precipitation 2: Small crystal precipitation is slightly observed 3: Small crystal precipitation is frequently observed 4: Large crystal precipitation is observed

(Visual observation of gel appearance: after storage for 2 weeks)
1: No turbidity is observed 2: Slight turbidity is observed, no precipitation of particles is observed 3: Remarkable turbidity is observed, but precipitation of particles is not observed 4: Remarkable turbidity is observed, particles are observed Precipitation is observed

(Feel evaluation)
The hair of a Japanese woman that has been treated once with straight perm and twice with bleach is treated as damaged hair, and each 20 g (15-20 cm in length, average diameter 80 μm) of hair bundle is obtained using 2 g of standard shampoo with the following composition. After applying 2g of the hair conditioner shown in Table 2 to the washed hair bundle, and thoroughly acclimating the whole hair, rinse it under running water of about 40 ° C for about 30 seconds, then dry it with towel and fully dry it with a dryer. Dried.

・ Standard shampoo formulation (pH 7.0)
25% polyoxyethylene (2.5) lauryl ether sulfate sodium salt 62.0%
Lauric acid diethanolamide 2.3%
Edetate disodium 0.15%
Sodium benzoate 0.5%
Sodium chloride 0.8%
75% phosphoric acid appropriate amount Fragrance, methylparaben appropriate amount Purified water remaining

  The hair was evaluated for "richness of hair when touched with hands when wet", "no stickiness after drying", "moist feeling after drying", and "smooth feeling after drying". The evaluation was performed by five people, and the total value (maximum 20 points) of five people was obtained for each item.

(Rich feeling of hair when touched with wet hands)
1: There is no rich feeling 2: There is not much rich feeling 3: There is a little rich feeling 4: There is a rich feeling

(No stickiness after drying)
1: There is stickiness 2: There is a little stickiness 3: There is not much stickiness 4: There is no stickiness

(Moist feeling after drying)
1: No moist feeling 2: Not very moist feeling 3: Somewhat moist feeling 4: Moist feeling

(Feel free after drying)
1: There is no smooth feeling 2: There is not very smooth feeling 3: There is a little smooth feeling 4: There is a smooth feeling

In the example shown in Table 1, the following components were used.
* 1 Polydimethylsiloxane: BY11-039 manufactured by Toray Dow Corning
* 2 Lanolin fatty acid: Crodacid 18-MEA manufactured by Croda Japan

Claims (12)

The following components (A), (B), (C):
(A) Amidoamine represented by the following general formula (I)

(In the general formula (I), R ¹ represents an aliphatic hydrocarbon group.)
(B) an organic carboxylic acid (C) containing an aliphatic alcohol having 8 to 30 carbon atoms and water,
The proportion of amidoamine in which R ¹ CO in the general formula (I) is a fatty acid residue having 20 carbon atoms is 51 to 99% by mass with respect to the whole component (A),
Wherein in the component (A), R ¹ CO in the general formula (I) are fatty acid residues of R ¹ CO is carbon 22 in the amido-amine and the general formula which is the fatty acid residue of 20 carbon atoms (I) A hair cosmetic composition having a mass ratio of [amidoamine having a fatty acid residue of 20 carbon atoms] / [amidoamine having a fatty acid residue of 22 carbon atoms] to 100 or less with a certain amidoamine. Wherein with respect to the total components (A), the ratio of the amidoamine R ¹ CO is the fatty acid residue of 22 carbon atoms in the general formula (I) is 1 to 49 mass%, according to claim 1 Hair cosmetics. Wherein with respect to the total components (A), R ¹ CO in the general formula (I) is R ¹ CO is carbon 22 in proportion with the general formula of the amidoamine is the fatty acid residue of 20 carbon atoms (I) The hair cosmetic according to claim 1 or 2, wherein the total amount of the fatty acid residue and the ratio of the amidoamine is 60% by mass or more.   The hair cosmetic according to any one of claims 1 to 3, wherein the component (B) is a hydroxycarboxylic acid or a dicarboxylic acid.   Hair cosmetics as described in any one of Claims 1 thru | or 4 whose content of the said component (A) in the said hair cosmetics is 0.1-20 mass%.   Hair cosmetics as described in any one of Claims 1 thru | or 5 whose content of the said component (B) in the said hair cosmetics is 0.1-5 mass%.   The hair cosmetic according to any one of claims 1 to 6, wherein the content of the component (C) in the hair cosmetic is 0.3 to 30% by mass.   Hair cosmetics as described in any one of Claims 1 thru | or 7 whose mass ratio (A) / (B) of the said component (A) with respect to the said component (B) is 1-20.   Furthermore, the hair cosmetics as described in any one of Claims 1 thru | or 8 containing a component (D) polydimethylsiloxane.   The hair cosmetic according to claim 9, wherein a mass ratio (A) / (D) of the component (A) to the component (D) is 0.1 to 20. Furthermore, the hair cosmetics as described in any one of Claims 1 thru | or 10 containing the branched fatty acid represented by component (E) following general formula (II), or its salt.
_{^{CH 3 -CHR 2 - (CH 2}} ) r COOH (II)
(In the general formula (II), R ² represents a methyl group or an ethyl group, and r represents an integer of 3 to 26.)   The hair cosmetic composition according to claim 11, wherein a mass ratio (A) / (E) of the component (A) to the (E) is 0.2 to 20.