JP7143727B2 - hair cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hair cosmetic having a conditioning effect in addition to a hair cleansing effect.

Amino acid-type surfactants have a mild effect on hair and are highly safe, and are therefore widely used in various hair cleansers in recent years. However, hair cleansers containing an amino acid-type surfactant as a main component sometimes have rough foam quality, and various attempts have been made to solve this problem.
For example, by combining anionic surfactants such as N-acyl-N-methyl taurine salts, polyglycerin fatty acid esters and polysaccharide polymers, low irritation to hair and excellent foaming power and foam quality can be achieved. A hair cleanser that achieves this has been proposed (Patent Document 1).
Furthermore, among hair cleansers, hair cosmetics of a type that emphasizes conditioning effects in addition to cleansing effects have been developed. For example, an acylamino acid salt type anionic surfactant, one or two amino acid derivatives selected from the group consisting of N-acyl-L-lysine and N-acyl-L-arginine, Disclosed is a hair cosmetic composition containing a saturated or branched monohydric alcohol, a copolymer of a glycerol (meth)acrylate monomer and an unsaturated monomer containing a long-chain alkyl group, and has elastic foam, It has been shown that it provides good finger combability during rinsing, soft hair after drying, and imparts conditioning effects such as an appropriate voluminous feel to the hair after drying (Patent Document 2).

However, when the volume is imparted to the hair, the styling performance may be deteriorated. A hair cosmetic that imparts good styling properties is composed of fatty acid glycol ester, polyoxyethylene fatty acid monoalkanolamide, polyhydric alcohol, polyoxyethylene alkyl ether sulfate, and water, and the mass ratio of each component is specified. and a sulfate-type anionic surfactant, which provide improved feel upon rinsing and ease of styling during post-shampooing hair drying. It has been shown to be good (Patent Document 3).

In recent years, with the acceleration of women's social advancement, there is a growing need for easy-to-styling, quick and straightforward hair in response to the demand for beautiful hair. In particular, it is necessary to be able to style hair beautifully in the shortest possible time before going to work in the morning.
However, the techniques proposed so far have not been able to sufficiently satisfy all of the good foam quality, the voluminous feel of hair after shampooing and drying, and the styling properties that last until the next day after shampooing.

JP-A-2003-41299 JP 2016-69360 A WO2014/208162

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hair cosmetic that satisfies all of good foam quality, voluminous hair after shampooing and drying, and styling properties that last until the next day after shampooing.

The present inventors have made intensive studies to solve the above problems, and found that (a) fatty acid ester of polyglycerol having an average degree of polymerization of 3 to 20, and (b) acyl-β-alanine surfactant and (c) by including proteoglycan in a hair cosmetic, all of good foam quality, voluminous hair after shampooing and drying, and styling properties lasting until the next day after shampooing can be satisfied. , have completed the present invention.

That is, the present invention relates to the following.
[1] (a) 0.01% by mass to 5% by mass of a fatty acid ester of polyglycerol having an average degree of polymerization of 3 to 20, (b) an acyl-β-alanine type surfactant represented by formula (1) and (c) 0.0005% to 0.5% by mass of proteoglycan.

(In the formula, R ¹ represents an alkyl or alkenyl group having 7 to 19 carbon atoms, R ² represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, and M ¹ represents an alkali metal or an organic amine.)
[2] The hair cosmetic of [1], wherein (c) the proteoglycan is a vegetable proteoglycan.

The hair cosmetic composition of the present invention has the effect of satisfying all of good foam quality, voluminous hair after shampooing and drying, and styling properties that last until the next day after shampooing.

The hair cosmetic composition of the present invention contains (a) a fatty acid ester of polyglycerol having an average degree of polymerization of 3 to 20, (b) an acyl-β-alanine type surfactant, and (c) proteoglycan.

(a) Fatty acid ester of polyglycerol having an average degree of polymerization of 3 to 20 In the hair cosmetic composition of the present invention, the fatty acid ester of polyglycerin having an average degree of polymerization of 3 to 20 used as component (a) is glycerin. A fatty acid is ester-bonded to the hydroxyl group of polyglycerol, which is a condensate of.

The "polyglycerin" constituting the polyglycerin fatty acid ester preferably has an average degree of polymerization of 3 to 20, more preferably 3 to 10, and even more preferably 4 to 8.
Fatty acids that form esters with such polyglycerol include linear or branched fatty acids having 8 to 20 carbon atoms, such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid. , arachidic acid; unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid; , sunflower oil fatty acid, grape seed oil fatty acid, apricot kernel oil fatty acid, beef tallow fatty acid, hardened beef tallow fatty acid, and the like. Among these, unsaturated fatty acids or fatty acid mixtures containing unsaturated fatty acids are preferred, and linoleic acid, soybean oil fatty acids, sunflower oil fatty acids, grape seed oil fatty acids, apricot kernel oil fatty acids and the like are more preferred. Oil fatty acids and the like are particularly preferred.
As the fatty acid ester of polyglycerin, not only a monoester but also a diester, triester, or the like having a plurality of ester bonds can be used.

In the hair cosmetic composition of the present invention, the above polyglycerin fatty acid esters may be used singly or in combination of two or more as the component (a).
Such polyglycerol fatty acid esters may be produced, purified, etc. according to a production method known per se, and may be used, but in general, products with an active ingredient content of about 100% by mass are commercially available. Commercially available products are available.
Examples of commercially available fatty acid esters of polyglycerol include "Sunsoft (registered trademark) APF-C" and "Sunsoft (registered trademark) M-12J" provided by Taiyo Kagaku Co., Ltd. .

The content of component (a) in the hair cosmetic composition of the present invention is 0.01% by mass to 5% by mass, preferably 0.1% by mass to 3% by mass, and more preferably 0.3%. % to 1% by mass.
If the content of component (a) is less than 0.01% by mass, the foam quality and styling properties on the next day after shampooing may deteriorate. On the other hand, even if the content of component (a) exceeds 5% by mass, the effect commensurate with the content cannot be obtained, and it may not be economical.

(b) Acyl-β-alanine-type surfactant In the hair cosmetic composition of the present invention, the acyl-β-alanine-type surfactant used as component (b) is an anionic surfactant represented by formula (1). is an agent.

(In the formula, R ¹ represents an alkyl or alkenyl group having 7 to 19 carbon atoms, R ² represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, and M ¹ represents an alkali metal or an organic amine.)

In formula (1), R ¹ is an alkyl or alkenyl group having 7 to 19 carbon atoms. That is, in formula (1), the acyl group represented by R ¹ CO is an acyl group derived from a linear or branched fatty acid having 8 to 20 carbon atoms. Such acyl groups include, for example, capryloyl, caprinoyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, acyl groups derived from saturated fatty acids such as arachidinoyl, mixed fatty acids such as coconut oil fatty acid, palm oil fatty acid, and palm kernel oil fatty acid. , acyl groups derived from hardened beef tallow fatty acids and the like.
Among these, lauroyl, myristoyl, coconut oil fatty acid acyl, palm kernel oil fatty acid acyl and the like are preferred. Among these, lauroyl or coconut oil fatty acid acyl is more preferred, and lauroyl is particularly preferred.
When the number of carbon atoms in the acyl group is less than 8, the foam quality may be deteriorated, and when the number of carbon atoms in the acyl group is more than 20, the stability of the cosmetic may be deteriorated.

In formula (1), R ² is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group.
In formula (1), the alkyl group represented by R ² includes methyl, ethyl, propyl and isopropyl, with methyl group being preferred. Hydroxyalkyl groups include hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxyisopropyl groups, with hydroxymethyl groups being preferred. Among them, a methyl group is particularly preferable as the group represented by R ² .

In formula ( ¹ ), M1 is an alkali metal or an organic amine.
Examples of the alkali metal represented by M1 in formula ( ¹ ) include sodium and potassium.
Examples of organic amines represented by M1 include amines having ^a hydroxyalkyl group having 2 to 3 carbon atoms, and specific examples include monoethanolamine, diethanolamine and triethanolamine.
Among these, sodium salts and triethanolamine salts are preferred, and mixtures thereof are more preferred. In the mixture of sodium salt and triethanolamine salt, when the mixing ratio of sodium salt and triethanolamine salt (sodium salt: triethanolamine salt) is 1:2 to 2:1 in mass ratio, the hair volume is improved. It is particularly preferred because it provides even better effects in terms of feel and styling.

In the hair cosmetic composition of the present invention, the above acyl-β-alanine surfactants can be used singly or in combination of two or more as the component (b).
Acyl-β-alanine-type surfactants may be produced and purified according to a production method known per se, but in general, products that are aqueous solutions with an active ingredient content of about 30% by mass are commercially available. and such commercial products are also available.
Commercially available acyl-β-alanine surfactants include, for example, N-lauroyl-N-methyl-β-alanine sodium (“Softilt (registered trademark) AS-L” manufactured by NOF Corporation), N-lauroyl - N-methyl-β-alanine triethanolamine (manufactured by NOF Corporation "Softilt (registered trademark) AT-L"), N-lauroyl-N-hydroxyethyl-β-alanine sodium (manufactured by NOF Corporation "Luminovare" (registered trademark) SL”).

The content of component (b) in the hair cosmetic composition of the present invention is 1% to 20% by mass, preferably 3% to 18% by mass, and particularly preferably 8% to 16% by mass. is.
If the content of component (b) is less than 1% by mass, the foam quality may deteriorate, and the voluminous feel of the hair after washing and drying and the styling properties of the hair the next day after washing may deteriorate. . On the other hand, even if the content of component (b) exceeds 20% by mass, the effect commensurate with the content cannot be obtained, and it may not be economical.

In the hair cosmetic composition of the present invention, the content ratio [(a)/(b)] of component (a) and component (b) is preferably 0.0005 to 1, more preferably 0.0005 to 1 in mass ratio. is 0.01 to 0.4, more preferably 0.01 to 0.3.
If the content ratio [(a)/(b)] of the component (a) and the component (b) is within the above range, the foam quality of the hair cosmetic and the volume of the hair after washing and drying The texture and styling properties of the hair the next day after shampooing are further improved.

In the hair cosmetic composition of the present invention, the proteoglycan contained as the component (c) is a sugar-protein complex having a special structure, and includes animal and vegetable proteoglycans.
Animal proteoglycans are glycoproteins in which multiple glycosaminoglycans such as chondroitin sulfate and keratan sulfate are covalently bound to one core protein. are widely distributed in the body.
Plant proteoglycans are arabinogalactan and core protein bound in a definite manner and formally called arabinogalactan-protein (AGP). It exists as an extracellular matrix in plant cell walls and sap.
In the present invention, both animal proteoglycans and vegetable proteoglycans can be used as the component (c). However, considering production costs and the recent tendency to favor vegetable raw materials, vegetable proteoglycans are used. is preferred.

As the plant proteoglycan, those made from gum arabic obtained from Acacia senegal Willdenow belonging to the genus Acacia of the subfamily Mimosoideae of the family Leguminosae, or from plants related to the same genus. It is preferably used. Here, gum arabic is obtained by drying the exudate exuding from the wound of the bark of the plant.
Gum arabic obtained from Acacia senegal Willdenow or its seyal species, Acacia seyal Delile, is used for the purpose of the present invention, because it is possible to obtain proteoglycans having bioactivity equal to or higher than that of animal proteoglycans. The raw material is more preferred, and the raw material is more preferably gum arabic obtained from Acacia senegal Willdenow.

In the present invention, the vegetable proteoglycan preferably used as component (c) is obtained as a purified product obtained by removing mainly arabinogalactan and glycoprotein from gum arabic obtained from plants such as Hevea arabic.
For purposes of the present invention, plant proteoglycans have a weight average molecular weight of 900,000 to 3,500,000 as measured by size exclusion chromatography with an on-line multi-angle light scattering detector and a differential refractive index detector. One is preferably used, and one of 1,000,000 to 3,000,000 is more preferably used.
In addition, it is measured by an aldehyde quantification kit such as Amplite (trademark) Aldehyde Quantitation Kit (colorimetric) (product number: 10051) (manufactured by AAT Bioquest). Those having a total aldehyde content of 0.005 μmol equivalent/g to 2.0 μmol equivalent/g are preferably used.

The above-described component (c) can be used alone or in combination of two or more in the hair cosmetic composition of the present invention.
Animal proteoglycans may be extracted and purified from animal tissues such as salmon nasal cartilage, shark fin cartilage and squid head cartilage, and may be used, but commercial products provided by various companies may also be used. can.
On the other hand, vegetable proteoglycan is preferably obtained by subjecting an aqueous gum arabic solution prepared to 0.5% by mass to 40% by mass to a porous type I strongly basic anion exchange resin and a strongly acidic cation exchange resin for purification. Although it can be manufactured, it is also possible to use a commercially available product, which is generally available as an aqueous solution having an active ingredient content of about 1% by weight.
Examples of commercially available products of component (c) include "Phytoproteoglycan (registered trademark)" manufactured by NOF Corporation.

The content of component (c) in the hair cosmetic composition of the present invention is 0.0005% by mass to 0.5% by mass, preferably 0.05% by mass to 0.4% by mass, and more preferably. is 0.1% by mass to 0.3% by mass.
If the content of component (c) is not within the above range, the foam quality of the hair cosmetic composition, the voluminous feel of hair after shampooing and drying, and the styling properties on the next day after shampooing may deteriorate.

The hair cosmetic composition of the present invention can contain additive components that are commonly used in hair cosmetic compositions, in addition to the components (a) to (c), as long as the features of the present invention are not impaired. .
Examples of such components include oils such as soybean oil, sunflower seed oil, hydrogenated castor oil, olive oil, and shea butter; hydrocarbon oils such as squalane and light isoparaffin; aliphatic oils such as cetyl alcohol, stearyl alcohol, and cetostearyl alcohol. Alcohol; silicone oils such as cyclopentasiloxane, dimethylpolysiloxane, amino-modified polysiloxane; ester oils such as 2-ethylhexyl palmitate, tri(caprylic/capric acid) glyceryl, isopropyl myristate; stearyltrimethylammonium chloride, benz chloride Cationic surfactants such as ruconium; nonionic surfactants other than component (a) such as polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, coconut oil fatty acid monoethanolamide; polyoxyethylene lauryl ether sulfate Anionic surfactants other than component (b), such as salts, α-olefin sulfonates, and fatty acid soaps; Alkylbetaine-type amphoteric surfactants, such as alkyldimethylaminoacetic acid betaine; betaine type amphoteric surfactants, imidazoline type amphoteric surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amidosulfobetaine type amphoteric surfactants such as fatty acid amidopropyl hydroxysulfobetaine, amphoteric surfactants such as carbobetaine type amphoteric surfactants such as hydroxyalkyl hydroxyethyl sarcosine; water-soluble polymers such as hydroxypropyl methylcellulose, polyethylene glycol, polypropylene glycol; e) cationic polymers such as propyl]hydroxyethyl cellulose (cationized cellulose); solvents such as ethanol, propylene glycol, dipropylene glycol and glycerin; pH adjusters such as citrate, succinate, malate and tartrate. Antioxidants such as ascorbic acid, tocopherol, γ-oryzanol; Polysaccharides such as xanthan gum, gellan gum, tamarind gum; Amino acids (aspartic acid, sodium aspartate, serine, proline, etc.), peptides and proteins (whey, hydrolyzed silk , hydrolyzed collagen, etc.), moisturizing agents such as mucopolysaccharides (sodium hyaluronate, sodium chondroitin sulfate, etc.); plant extracts such as citrus extract; preservatives such as sodium benzoate, phenoxyethanol, and phenethyl alcohol; fragrances such as menthol, peppermint oil, and lavender extract; coloring agents such as pearlescent pigments (iron oxide-coated mica titanium, etc.) Depending on the purpose, one or more of them can be contained as appropriate.

The hair cosmetic composition of the present invention can be provided in the form of a liquid such as a solution, a dispersion, a suspension or an emulsion, or a semi-solid such as a gel, paste or cream. Alternatively, lower alcohols such as ethanol, especially liquid ones using water are preferable.
In addition, the hair cosmetic composition of the present invention can be suitably provided as, for example, a hair shampoo, rinse-in shampoo, and the like.
The hair cosmetic composition of the present invention is obtained by adding the above-mentioned components (a), (b) and (c) to a solvent such as water, if necessary, together with other additive components, and mixing them. It can be produced by dissolving, dispersing, suspending, emulsifying, etc. according to a conventional method.

EXAMPLES The present invention will now be described more specifically with reference to examples and comparative examples.

[Examples 1 to 8, Comparative Examples 1 to 5] Hair cosmetics Components (a) to (c) in Table 1 and other additive components were sequentially added to water, mixed, and uniformly dissolved. , the hair cosmetics of Examples 1 to 8 were prepared.
In addition, components (a), (a'), (b), (b'), (c), (c') and other additive components in Table 2 were sequentially added to water. The ingredients were mixed and dissolved uniformly to prepare hair cosmetics of Comparative Examples 1 to 5.
The content of each component shown in Tables 1 and 2 is shown in % by mass. A blank in the table indicates that the component is not contained.

As each component in Tables 1 and 2, the following raw materials were used.
(i) component (a);
(a-1) Polyglycerin (average degree of polymerization = 6) apricot kernel oil fatty acid esters (“Sunsoft (registered trademark) APF-C” (manufactured by Taiyo Kagaku Co., Ltd.))
(a-2) Polyglycerin (average degree of polymerization = 10) lauric acid ester (“Sunsoft (registered trademark) M-12J” (manufactured by Taiyo Kagaku Co., Ltd.))
(ii) Component (a'): polyethylene glycol (average degree of polymerization = 30) coconut oil fatty acid glycerin ester ("Unigly (registered trademark) MK-230" (manufactured by NOF Corporation))
(iii) component (b);
(b-1) N-lauroyl-N-methyl-β-alanine sodium (“Softilt (registered trademark) AS-L” (manufactured by NOF Corporation)) (in formula (1), R ¹ CO = lauroyl, R ² = methyl, M ¹ = sodium)
(b-2) N-lauroyl-N-methyl-β-alaninetriethanolamine (“Softilt (registered trademark) AT-L” (manufactured by NOF Corporation)) (in formula (1), R ¹ CO = lauroyl , R ² =methyl, M ¹ =triethanolamine)
(b-3) N-lauroyl-N-hydroxyethyl-β-alanine sodium (“Luminovare (registered trademark)” manufactured by NOF Corporation) (in formula (1), R ¹ CO = lauroyl, R ² = hydroxyethyl, M ¹ = sodium)
(iv) Component (b'); sodium N-coconut oil fatty acid acylmethyltaurate (“Diapon (registered trademark) K-SF” (manufactured by NOF Corporation))
Component (v) (c): Vegetable proteoglycan (“phytoproteoglycan” (manufactured by NOF Corporation)) (weight average molecular weight = about 1,200,000, total aldehyde content = 1.8 μmol equivalent/g)
(vi) Component (c'): hydrolyzed keratin "Promois (registered trademark) KR-30" (manufactured by Seiwa Kasei Co., Ltd.)
(vii) other additive ingredients;
Cationized cellulose (O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride) ("Leoguard KGP" (manufactured by Lion Corporation))
N-coconut oil fatty acid-N-methylethanolamide (“Aminone (registered trademark) C-11S” (manufactured by Kao Corporation))
Coconut oil fatty acid amidopropyl betaine liquid (“Nissan Anon (registered trademark) BDF-SF” (manufactured by NOF Corporation))

The hair cosmetics of Examples and Comparative Examples were evaluated for foam quality, voluminous hair after shampooing and drying, and styling properties on the next day after shampooing.

(1) Foam quality A panel of 20 women (25 to 43 years old) with long hair whose tips reach between the shoulders and waist was used as a panel, and each panelist was given 0.5 g of each hair cosmetic. washed. At that time, the foam quality of the hair cosmetic composition was subjected to sensory evaluation, and scored according to the following criteria.
<Scoring criteria>
2 points: When feeling that the foam quality is very good.
1 point: When feeling that the foam quality is slightly good.
0 points: When feeling that the foam quality is poor.

(2) Volume of hair after washing and drying A panel of 20 women (25 to 43 years old) with long hair whose tip reaches between the shoulder and waist. Hair was washed with 0.5 g. Next, the voluminous feel of the hair after drying with a drier was subjected to sensory evaluation, and scored according to the following criteria.
<Scoring criteria>
2 points: When feeling that a sense of volume is obtained.
1 point: When it is felt that a sense of volume is obtained to some extent.
0 point: When feeling that a sense of volume is not obtained.

(3) Styling property the day after washing hair A panel of 20 women with long hair (ages 25 to 43) whose tips reach between the shoulders and the waist was washed with 0.5 g of each hair cosmetic and dried. dried with On the next day, the styling properties of the hair were sensory evaluated and scored according to the following criteria.
<Scoring criteria>
2 points: When the ease of styling is felt on the next day.
1 point: When the ease of styling was slightly felt on the next day.
0 point: When the ease of styling was not felt on the next day.

For each of the above (1) to (3), the sum of the evaluation scores of the panelists was obtained, and evaluation was made on a scale of 4 according to the following evaluation criteria. The results are shown in Tables 1 and 2 together with the total evaluation points. In addition, the case where it evaluated as "(double-circle)" and the case where it evaluated as "(circle)" were set as the pass.
<Evaluation Criteria>
◎: Total score is 35 or more ○: Total score is 30 or more and less than 35 △: Total score is 25 or more and less than 30 ×: Total score is less than 25

As shown in Table 1, the hair cosmetics of Examples 1 to 8 were all evaluated to be excellent in foam quality, voluminous hair after shampooing and drying, and styling properties the next day after shampooing.
In particular, it contains 0.5% by mass of polyglycerin apricot kernel oil fatty acid esters as component (a), and N-lauroyl-N-methyl-β-alanine sodium salt and N-lauroyl-N-methyl as components (b). - The hair cosmetic composition of Example 2 containing β-alanine triethanolamine salt at a mass ratio of 2:1 was evaluated as "◎" in all evaluation items, and the foam quality, after washing and drying The voluminous feel of the hair and the styling properties on the next day after washing the hair were particularly excellent.

On the other hand, as shown in Table 2, none of the hair cosmetics of Comparative Examples 1 to 5 was evaluated as passing in all the evaluation items.
Regarding the hair cosmetic composition of Comparative Example 1, which contains polyethylene glycol (average degree of polymerization = 30) coconut oil fatty acid glycerin ester as component (a') instead of component (a), after shampooing and drying was evaluated as insufficient in hair volume and styling properties the next day after shampooing.
With regard to the hair cosmetic composition of Comparative Example 2, in which sodium N-coconut oil fatty acid acylmethyltaurate, which is the component (b'), is contained instead of the component (b), the volume of the hair after shampooing and drying is improved. And it was evaluated that the styling property on the next day after shampooing was insufficient.
The hair cosmetic composition of Comparative Example 3, which did not contain the component (a), was evaluated as having insufficient foam quality and styling properties on the next day after shampooing.
The hair cosmetic of Comparative Example 4 containing hydrolyzed keratin as component (c') instead of component (c) was evaluated as having insufficient styling properties on the next day after shampooing.
The hair cosmetic of Comparative Example 5, which did not contain the component (c), was evaluated as insufficient in terms of foam quality, voluminous hair after shampooing and drying, and styling properties on the next day after shampooing.

As described in detail above, the present invention provides a hair cosmetic that satisfies all of good foam quality, voluminous hair after shampooing and drying, and styling properties that last until the next day after shampooing. can.

Claims (2)

(a) 0.01% to 5% by mass of a fatty acid ester of polyglycerol having an average degree of polymerization of 3 to 20, and (b) 1% by mass of an acyl-β-alanine surfactant represented by formula (1) % to 20% by mass, and (c) 0.0005% to 0.5% by mass of proteoglycan.

(In the formula, R ¹ represents an alkyl or alkenyl group having 7 to 19 carbon atoms, R ² represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, and M ¹ represents an alkali metal or an organic amine.) 2. The hair cosmetic composition according to claim 1, wherein (c) the proteoglycan is a vegetable proteoglycan.