JP2014047152A - Hair cosmetic - Google Patents

Abstract

(B) シクロデキストリン 10質量％を超え30質量％未満
(C) 水 50質量％を超え90質量％未満
【選択図】なしIn a water-based hair cosmetic composition, it is possible to suppress dripping after application and to maintain a setting force for a long time even under high humidity.
A hair cosmetic comprising the following components (A) to (C).
(A) Copolymer (I) containing the structural unit represented by general formula (1) and the structural unit represented by general formula (2), and the structural unit and general formula represented by general formula (3) (4) at least one copolymer selected from the group consisting of a copolymer (II) containing the structural unit represented by

(B) Cyclodextrin more than 10% by mass and less than 30% by mass
(C) Water more than 50% by mass and less than 90% by mass [Selection figure] None

Description

  The present invention relates to a hair cosmetic.

  Examples of hairdressing cosmetics include mist-like hairdressing agents, foamy hairdressing agents, hair gels, hair creams, hair waxes and other hair cosmetics, and mascara and other eyelash cosmetics. In these hairdressing cosmetics, a film-forming resin is blended to impart hairstyling properties. There are various types of film-forming resins. Usually, film-forming resins are stably blended in hairdressing cosmetics by dissolving them in a solvent such as ethanol.

Recently, there is a demand for reducing the use of organic solvents such as ethanol for reasons such as environmental problems.
Patent Document 1 proposes the use of cyclodextrin in an aqueous hair styling composition in which the use of an organic solvent is reduced in order to improve the solubility of the hair styling polymer.

International Publication No. 2002/38113

  However, water-based hair cosmetics have a problem in that when water is applied to the hair, the water penetrates into the hair, which causes dripping (sagging of the hair) and the set is broken. Furthermore, after setting the hair, there is a problem that the setting force cannot be maintained for a long time under high humidity, and the setting force is reduced.

  An object of the present invention is to suppress hair sag after application in a water-based hair cosmetic composition and maintain a setting force for a long time even under high humidity.

The present invention provides a hair cosmetic containing the following components (A) to (C).
(A) At least one copolymer selected from the group consisting of copolymer (I) and copolymer (II)

  Copolymer (I): a copolymer comprising a structural unit represented by the general formula (1) and a structural unit represented by the general formula (2)

[Wherein, R ¹ and R ⁴ each independently represent a hydrogen atom or a carboxy group, R ² and R ⁵ each independently represent a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ⁶ represents an alkyl group having 1 to 12 carbon atoms, or an alkyl group having 1 to 12 carbon atoms having an amino group, a methylamino group, a dimethylamino group, or a trimethylammonio group. ]

  Copolymer (II): a copolymer comprising a structural unit represented by general formula (3) and a structural unit represented by general formula (4)

[Wherein, R ⁷ and R ¹⁰ each independently represent a hydrogen atom or a carboxy group, R ⁸ and R ¹¹ each independently represent a hydrogen atom or a methyl group, and R ⁹ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ¹² represents an alkyl group having 1 to 12 carbon atoms. ]
(B) Cyclodextrin more than 10% by mass and less than 30% by mass
(C) Water more than 50% by mass and less than 90% by mass

  The hair cosmetic composition of the present invention can suppress dripping after application and can maintain a setting force for a long time even under high humidity.

[(A): Copolymer (I) or (II)]
The hair cosmetic composition of the present invention contains at least one copolymer selected from the group consisting of copolymer (I) and copolymer (II) as component (A).

<Copolymer (I)>
Copolymer containing the structural unit represented by the general formula (1) and the structural unit represented by the general formula (2)

[Wherein, R ¹ and R ⁴ each independently represent a hydrogen atom or a carboxy group, R ² and R ⁵ each independently represent a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ⁶ represents an alkyl group having 1 to 12 carbon atoms, or an alkyl group having 1 to 12 carbon atoms having an amino group, a methylamino group, a dimethylamino group, or a trimethylammonio group. ]

The structural unit represented by the general formula (1) and the structural unit represented by the general formula (2) in one molecule of the copolymer may each be a single structural unit or substituted. Two or more structural units having different groups may be included.
R ³ is preferably an alkyl group having 1 to 22 carbon atoms, more preferably an alkyl group having 1 to 20 carbon atoms.
R ⁶ is preferably an alkyl group having 1 to 10 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms.

  Contains structural units derived from (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, in addition to the structural unit represented by general formula (1) and the structural unit represented by general formula (2). However, from the viewpoint of suppressing hair sag after application and maintaining the setability of the hair, the structural unit represented by the general formula (1) and the structural unit represented by the general formula (2) In total, the copolymer (I) preferably contains 60 to 100% by mass, more preferably 70 to 100% by mass, further 80 to 100% by mass, and further preferably 90 to 100% by mass. .

  Specific examples of the copolymer (I) include acrylates / C1-18 alkyl acrylates / C1-8 alkyl acrylamide copolymer (plus size L-9909B manufactured by Kyoyo Chemical Co., Ltd.), alkyl acrylamide / acrylate / alkyl aminoalkyl acrylamide / Polyethylene glycol methacrylate copolymer (see JP 2010-275219), t-butylacrylamide / dimethylacrylamide / dimethylaminopropylacrylamide / methoxypolyethylene glycol (PEG400) methacrylate copolymer (see JP 2010-275219) Etc.

<Copolymer (II)>
Copolymer containing structural unit represented by general formula (3) and structural unit represented by general formula (4)

[Wherein, R ⁷ and R ¹⁰ each independently represent a hydrogen atom or a carboxy group, R ⁸ and R ¹¹ each independently represent a hydrogen atom or a methyl group, and R ⁹ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ¹² represents an alkyl group having 1 to 12 carbon atoms. ]

  In addition, the structural unit represented by the general formula (3) and the structural unit represented by the general formula (4) in one molecule of the copolymer may each be a single structural unit, or may be substituted. Two or more structural units having different groups may be included.

  Contains structural units derived from (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, etc. in addition to the structural unit represented by general formula (3) and the structural unit represented by general formula (4) However, from the viewpoint of suppressing hair sag after application and maintaining the setability of the hair, the structural unit represented by the general formula (3) and the structural unit represented by the general formula (4) In total, the copolymer (II) preferably contains 60 to 100% by mass, more preferably 70 to 100% by mass, further 80 to 100% by mass, and further preferably 90 to 100% by mass. .

  Specific examples of the copolymer (II) include methyl vinyl ether / alkyl maleate copolymers (Gantrez ES-225, ES-425, SP-215, etc., manufactured by ISP) and the like.

  Among the copolymers of component (A), copolymer (I) is preferred, and among copolymers (I), the following (A1) or (A2) copolymers are more preferred.

(A1) Copolymer obtained from a monomer mixture containing the following monomers (a) to (d)
(a) (Meth) acrylamide monomer represented by general formula (5): 30 to 80% by mass

[Wherein, R ¹³ represents a hydrogen atom or a methyl group, R ¹⁴ represents a hydrogen atom, and R ¹⁵ represents an alkyl group having 4 to 12 carbon atoms. ]

  (b) (Meth) acrylamide monomer represented by general formula (6): 2 to 50% by mass

[Wherein, R ¹³ represents the same as described above, and R ¹⁶ and R ¹⁷ are the same or different and represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. ]

  (c) (meth) acrylic acid ester monomer or (meth) acrylamide monomer represented by general formula (7): 0 to 30% by mass

[Wherein, R ¹³ represents the same as described above, R ¹⁸ represents an alkylene group having 2 or 3 carbon atoms, and R ¹⁹ and R ²⁰ are the same or different and represent a methyl group or an ethyl group. a represents a number of 0 or 1; ]

  (d) (Meth) acrylic acid ester monomer represented by formula (8): 0 to 40% by mass

[Wherein, R ¹³ represents the same as above, R ²¹ and R ²² are the same or different and represent an alkylene group having 2 to 4 carbon atoms, R ²³ represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or Represents a phenyl group; b and c each represent a number from 0 to 50, but b and c are not 0 simultaneously. ]

(A2) Copolymer obtained from a monomer mixture containing the following monomers (e) to (h)
(e) (Meth) acrylamide monomer represented by general formula (9): 30 to 80% by mass

[Wherein, R ²⁴ represents a hydrogen atom or a methyl group, R ²⁵ represents a hydrogen atom, and R ²⁶ represents an alkyl group having 4 to 12 carbon atoms. ]

  (f) (Meth) acrylic acid ester monomer represented by general formula (10): 5 to 45% by mass

[Wherein, R ²⁴ represents the same as described above, and R ²⁷ represents an alkyl group having 1 to 4 carbon atoms. ]

  (g) (Meth) acrylic acid ester monomer or (meth) acrylamide monomer represented by general formula (11): 2 to 30% by mass

[Wherein R ²⁴ represents the same as described above, R ²⁸ represents an alkylene group having 2 or 3 carbon atoms, and R ²⁹ and R ³⁰ are the same or different and represent a methyl group or an ethyl group. a represents a number of 0 or 1; ]

  (h) (Meth) acrylic acid ester monomer represented by general formula (12): 0 to 30% by mass

[Wherein, R ²⁴ represents the same as described above, R ³¹ and R ³² are the same or different and represent an alkylene group having 2 to 4 carbon atoms, and R ³³ represents a hydrogen atom or a methyl group. b and c each represent a number from 0 to 50, but b and c are not 0 simultaneously. ]

  The weight average molecular weight of the copolymer of component (A) (according to gel filtration chromatography (polyethylene glycol equivalent)) can be controlled to 1,000 to 1,000,000 if the polymerization conditions are selected. In the present invention, the weight average molecular weight is 10,000 to 500,000. Furthermore, 20,000 to 200,000 are preferred.

  The copolymer of component (A) is preferably 0.01 to 20% by mass, more preferably 0.1 to 10% by mass, and still more preferably 0.5% in the hair cosmetic from the viewpoint of achieving both high hair styling power and no stiffness. -7 mass% is contained.

[(B): cyclodextrin]
The hair cosmetic composition of the present invention contains cyclodextrin in an amount of more than 10% by mass and less than 30% by mass as component (B). The cyclodextrin preferably has a solubility of 0.1 g or more in 100 mL of water at room temperature, more preferably 5 g or more, and even more preferably 10 g or more. The cyclodextrin is preferably a substituted or unsubstituted α-cyclodextrin, a substituted or unsubstituted β-cyclodextrin, or a substituted or unsubstituted γ-cyclodextrin, and particularly suppresses drooping of the hair after application, From the viewpoint of maintaining hair setting properties and water solubility, a substituted or unsubstituted α-cyclodextrin is more preferable.

  The cyclodextrin of component (B) is preferably 10.5 to 28% by mass, more preferably 11 to 26% by mass in the hair cosmetic composition from the viewpoint of suppressing hair sag after application and maintaining hair setting properties. More preferably, the content is 12 to 24% by mass.

[(C): Water]
The hair cosmetic composition of the present invention contains more than 50% by weight of water and less than 90% by weight as component (C). From the viewpoint of reducing the use of an organic solvent, the water of component (C) is preferably 60% by mass or more and less than 90% by mass, more preferably 70% by mass or more and less than 90% by mass, and still more preferably 80% in hair cosmetics. More than 90% by mass is contained.

[(D): Aromatic sulfone compound]
The hair cosmetic composition of the present invention may further contain an aromatic sulfone compound represented by the general formula (13) as the component (D).

[Wherein, Rs are the same or different and each represents a hydrogen atom or a monovalent hydrocarbon group, or two adjacent Rs together form a saturated or unsaturated divalent hydrocarbon group. X represents an oxygen atom or a nitrogen atom, Y represents a hydrogen atom when X is an oxygen atom, and Y represents a carbonyl group bonded to X when X is a nitrogen atom. Z ⁺ represents a monovalent cation. ]

  Examples of the monovalent hydrocarbon group in R include an alkyl group, an aryl group, and an aralkyl group, an alkyl group having 1 to 8 (preferably 1 to 4) carbon atoms, and 6 to 10 (preferably 6 to 6) carbon atoms. The aryl group or aralkyl group of 8) is preferred, and specific examples include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a t-butyl group, a phenyl group, and a benzyl group.

  Examples of the saturated or unsaturated divalent hydrocarbon group formed by combining two adjacent Rs together include an alkylene group and an alkylidene group, and an alkylene having 2 to 6 (preferably 2 to 4) carbon atoms. Group or alkylidene group is preferable, for example, ethylene group, ethylidene group, vinylene group, trimethylene group, isopropylidene group, 1-propenylene group, tetramethylene group, 2-methyltrimethylene group, 1-methyltrimethylene group, 2- Examples include propenylene group, 2-butenylene group, buta-1,3-diene-1,4-diyl and the like. Specifically, when two adjacent R's together form buta-1,3-diene-1,4-diyl, tetramethylene group, 1-propenylene group, 2-propenylene group, trimethylene group, As the aromatic sulfone compound, naphthalene sulfonic acid, tetrahydronaphthalene sulfonic acid, indene sulfonic acid, and indane sulfonic acid are formed, respectively. Among them, naphthalene sulfonic acid is preferable.

  When X is an oxygen atom, Y represents a hydrogen atom, but R is preferably an alkyl group or two adjacent Rs together form an alkylidene group. On the other hand, when X is a nitrogen atom, Y represents a carbonyl group bonded to X, but R is preferably a hydrogen atom.

The aromatic sulfone compound of component (D) can have an arbitrary monovalent cation Z ⁺ as a counter cation, where Z ⁺ is a proton, an alkali metal ion (for example, sodium ion, potassium ion), ammonium Ions are preferred.

  More preferable examples of the aromatic sulfone compound of component (D) include benzenesulfonic acid or a salt thereof, paratoluenesulfonic acid or a salt thereof, 2,4-dimethylbenzenesulfonic acid or a salt thereof, and 2,5-dimethylbenzenesulfone. Examples thereof include acid or a salt thereof, naphthalenesulfonic acid or a salt thereof, saccharin or a salt thereof. Of these, p-toluenesulfonic acid or a salt thereof, 2,4-dimethylbenzenesulfonic acid or a salt thereof, naphthalenesulfonic acid or a salt thereof, or saccharin or a salt thereof is more preferable. These can be used alone or in combination of two or more.

  The aromatic sulfone compound of component (D) is preferably 0.1% in the hair cosmetic composition from the viewpoint of suppressing hair sag after application, maintaining the hair setting property, and adjusting the viscosity of the hair cosmetic composition. -20% by mass, more preferably 0.5-10% by mass, still more preferably 1-7% by mass.

〔solvent〕
The solvent may contain a solvent other than water, such as lower alcohol (ethanol, isopropanol, etc.), lactones, etc., but the solvent other than water is a viewpoint that improves the solubility of each component contained in the hair cosmetic. Therefore, it is preferably 0 to 45% by mass, more preferably 0 to 30% by mass, further preferably 0 to 15% by mass, and further preferably 0 to 10% by mass in the hair cosmetic composition.

[Optional ingredients]
In the hair cosmetic composition of the present invention, in addition to the above components, a cosmetic oil agent can be added within the limits that do not interfere with the effects of the present invention, and the content in the hair cosmetic composition is preferably 0.1 to 10% by mass. Such cosmetic oils include glycerides such as castor oil, cacao oil, mink oil, avocado oil, olive oil; waxes such as beeswax, whale wax, lanolin, carnauba wax; cetyl alcohol, oleyl alcohol, hexadecyl alcohol Higher alcohols such as lauryl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol; isopropyl myristate, hexyl laurate, cetyl lactate, propylene glycol monostearate, oleyl oleate, hexadecyl 2-ethylhexanoate, Esters of myristic acid octyldodecyl acid; liquid oils such as liquid paraffin, petrolatum, squalane, hydrogenated polyisobutene; dimethylpolysiloxane, methylphenylpolysiloxane, polyether modified Examples include silicone derivatives such as silicone oil, epoxy-modified silicone oil, amino-modified silicone oil, and alkyl-modified silicone oil; polypropylene glycol and the like. Furthermore, an emulsifier can be added in order to stabilize the emulsification of these cosmetic oils. As the emulsifier, any of anionic, amphoteric, cationic and nonionic surfactants can be used.

  Further, the hair cosmetic composition of the present invention can be added with a fragrance, a pigment, and a preservative and an antioxidant to prevent daily deterioration of the hair cosmetic composition in order to increase commercial value. Depending on the humidity control agent such as glycerin and propylene glycol, curing agent, antistatic agent, surfactant, antifoaming agent, dispersant, thickener, ultraviolet absorber, antioxidant, preservative, colored dye, Dye fixing agents, propellants and the like can also be added.

(Drug type)
The dosage form of the hair cosmetic composition of the present invention is not particularly limited, and can be transparent liquid, lotion, emulsion, mist (hair mist, hair spray), foam (hair mousse), etc. It is preferable that the dosage form is applied in a shape.
When the hair cosmetic composition of the present invention is used as an aerosol-type hair cosmetic composition composed of an aerosol stock solution and a propellant, the content of each component refers to the content in the entire composition of the aerosol stock solution that does not contain a propellant. And

〔viscosity〕
The hair cosmetic composition of the present invention preferably has a viscosity of 0.1 mPa · s or more and 100 mPa · s or less, more preferably 20 mPa · s or less, and further 10 mPa · s, in order to produce appropriate tackiness when applied to the hair. -It is preferable that it is below s. When used as a mist form, the hair cosmetic is sprayed in a good mist form by setting the viscosity to 0.1 mPa · s or more and 100 mPa · s or less, further 20 mPa · s or less, and further 10 mPa · s or less. In addition, problems such as clogging of the nozzles of the spraying device can be reduced.
The viscosity is the value after rotating for 1 minute at 30 rpm using a rotor No. 19 (L / Adp) with a B-type rotational viscometer (model TVB-10H) manufactured by Toki Sangyo Co., Ltd. The measurement is performed in a constant temperature bath at 25 ° C.

[PH]
The pH of the hair cosmetic of the present invention is measured by adjusting the temperature of the sample to 25 ° C. using a glass electrode type hydrogen ion concentration meter F-14 (manufactured by Horiba, Ltd.) and directly putting the electrode into the sample. . 2-9 are preferable and, as for pH of the hair cosmetics of this invention, 3-8 are more preferable.

  The embodiments of the present invention described above are summarized below.

<1>
A hair cosmetic containing the following components (A) to (C).
(A) At least one copolymer selected from the group consisting of copolymer (I) and copolymer (II) Copolymer (I): a structural unit represented by general formula (1) and general Copolymer containing structural unit represented by formula (2)

[Wherein, R ¹ and R ⁴ each independently represent a hydrogen atom or a carboxy group, R ² and R ⁵ each independently represent a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ⁶ represents an alkyl group having 1 to 12 carbon atoms, or an alkyl group having 1 to 12 carbon atoms having an amino group, a methylamino group, a dimethylamino group, or a trimethylammonio group. ]
Copolymer (II): a copolymer comprising a structural unit represented by general formula (3) and a structural unit represented by general formula (4)

[Wherein, R ⁷ and R ¹⁰ each independently represent a hydrogen atom or a carboxy group, R ⁸ and R ¹¹ each independently represent a hydrogen atom or a methyl group, and R ⁹ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ¹² represents an alkyl group having 1 to 12 carbon atoms. ]
(B) Cyclodextrin more than 10% by mass and less than 30% by mass
(C) Water more than 50% by mass and less than 90% by mass

<2>
The hair cosmetic composition according to <1>, wherein R ³ in the general formula (1) is an alkyl group having 1 to 22 carbon atoms, and R ⁶ in the general formula (2) is an alkyl group having 1 to 10 carbon atoms.

<3>
The hair cosmetic composition according to <1> or <2>, wherein the component (A) has a weight average molecular weight of 10,000 to 500,000, preferably 20,000 to 200,000.

<4>
The content of the component (A) is 0.01 to 20% by mass, preferably 0.1 to 10% by mass, and more preferably 0.5 to 7% by mass in the hair cosmetic composition, according to any one of <1> to <3>. Hair cosmetics.

<5>
The hair cosmetic composition according to any one of <1> to <4>, wherein component (B) is α-cyclodextrin.

<6>
The hair cosmetic composition according to any one of <1> to <5>, wherein the content of the component (B) is 10.5 to 28% by mass, preferably 11 to 26% by mass, and more preferably 12 to 24% by mass.

<7>
<1> to <6>, wherein the content of the component (C) is 60% by mass or more and less than 90% by mass, preferably 70% by mass or more and less than 90% by mass, and more preferably 80% by mass or more and less than 90% by mass. Hair cosmetics as described in any one.

<8>
The hair cosmetic composition according to any one of <1> to <7>, which is a dosage form applied in a mist form.

<9>
The hair cosmetic according to any one of <1> to <8>, wherein the viscosity of the hair cosmetic is 0.1 mPa · s or more and 100 mPa · s or less, preferably 20 mPa · s or less, more preferably 10 mPa · s or less.

<10>
The hair cosmetic according to any one of <1> to <9>, wherein the pH of the hair cosmetic is 2 to 9, preferably 3 to 8.

Examples 1-6 and Comparative Examples 1-8
Prepare hair cosmetics (hair mist) shown in Table 1 in accordance with conventional methods, and evaluate the “dripping effect after application”, “set retention (under high humidity)” and “sprayability” according to the following methods. went.

<Hair sag suppression effect after application>
A hair bundle having a length of 25.5 cm and a weight of 3 g was wetted with water, wound around a rod (tube) having a diameter of 2.2 cm, and naturally dried (left at room temperature for 24 hours or more). After drying, the rod was removed and the apparent length (L) of the hair bundle was measured. Next, 0.6 g of each sample was uniformly applied to this hair bundle using a sprayer with a trigger (PT-200 nozzle diameter: φ0.3 mm) manufactured by Yoshino Kogyo, and then the hair bundle was suspended at room temperature and humidity. After 30 minutes, the apparent length (L ₀ ) of the hair bundle was measured again.
From these measured values, the hair sag suppression rate was determined by the following equation.
Hair sag inhibition rate (%) = [(25.5−L ₀ ) ÷ (25.5−L)] × 100
The closer this value is to 100, the higher the effect of suppressing hair sag.

<Set holding power (under high humidity)>
0.75g of each sample was uniformly applied with a dropper to a hair bundle of 26cm in length and 1g in weight, wound around a 2.2cm diameter rod (tube), and left in a constant temperature room at 40 ° C for 6 hours to dry completely. . After drying, the rod was removed and the apparent length (L) of the hair bundle was measured. Next, the hair bundle was hung in a constant temperature and humidity chamber at a temperature of 25 ° C. and a humidity of 90%, taken out after 2 hours, and the apparent length (L ₀ ) of the hair bundle was measured again. From these measured values, the set holding force was obtained by the following equation.
Set holding force (%) = [(26−L ₀ ) ÷ (26−L)] × 100
The closer this value is to 100, the stronger the set holding power.

<Sprayability>
Each sample was sealed in a sprayer with a trigger (PT-200 nozzle diameter: φ0.3 mm) manufactured by Yoshino Kogyo, and the sprayed state was observed.
○: Sprayed in a mist form (good spraying)
X: It discharged in linear form, without becoming foggy. Or did not discharge (spray failure)

Example 7
The hair spray shown below was produced by a conventional method.
(mass%)
GANTREZ ES-225 (ISP, 50% by weight aqueous solution) 2
α-Cyclodextrin 11
Aminomethylpropanol 0.1
Purified water balance

Claims (4)

A hair cosmetic containing the following components (A) to (C).
(A) At least one copolymer selected from the group consisting of copolymer (I) and copolymer (II) Copolymer (I): a structural unit represented by general formula (1) and general Copolymer containing structural unit represented by formula (2)

[Wherein, R ¹ and R ⁴ each independently represent a hydrogen atom or a carboxy group, R ² and R ⁵ each independently represent a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ⁶ represents an alkyl group having 1 to 12 carbon atoms, or an alkyl group having 1 to 12 carbon atoms having an amino group, a methylamino group, a dimethylamino group, or a trimethylammonio group. ]
Copolymer (II): a copolymer comprising a structural unit represented by general formula (3) and a structural unit represented by general formula (4)

[Wherein, R ⁷ and R ¹⁰ each independently represent a hydrogen atom or a carboxy group, R ⁸ and R ¹¹ each independently represent a hydrogen atom or a methyl group, and R ⁹ represents an alkyl group having 1 to 24 carbon atoms, Or a substituent represented by — (AO) _n R _Z (AO is an ethylene oxide group and / or propylene oxide group, n is an average value of 1 to 15 and R _Z is a hydrogen atom or 1 to 5 carbon atoms) R ¹² represents an alkyl group having 1 to 12 carbon atoms. ]
(B) Cyclodextrin more than 10% by mass and less than 30% by mass
(C) Water more than 50% by mass and less than 90% by mass   The hair cosmetic composition according to claim 1, wherein component (B) is α-cyclodextrin. The hair cosmetic according to claim 1 or 2, wherein R ³ in the general formula (1) is an alkyl group having 1 to 22 carbon atoms, and R ⁶ in the general formula (2) is an alkyl group having 1 to 10 carbon atoms. .   The hair cosmetic composition according to any one of claims 1 to 3, which is a dosage form applied in a mist form.