JP2010126521A - Hair cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hair cosmetic that has setting properties and re-dressing properties, and hardly causes stickiness and a remaining feeling after shampooing. <P>SOLUTION: The hair cosmetic comprises components (A) and (B), where the content ratio of the component (A) to the component (B) is such that the mass ratio (B)/(A) is 35/65 to 65/35 and the amount of a liquid compound bearing at least two OH groups and having a molecular weight of 62-1,000 is less than 1 mass%. (A) A copolymer obtained from a mixture of a monomer represented by general formula (1) (wherein R<SP>1</SP>is a hydrogen atom or a methyl group; and R<SP>2</SP>and R<SP>3</SP>are the same or different and are each a hydrogen atom or a 4-12C alkyl group provided that R<SP>2</SP>and R<SP>3</SP>are not a hydrogen atom at the same time) and the like. (B) A nonionic surfactant bearing at least two hydroxy groups. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hair cosmetic excellent in setting properties and re-styling properties.

  Conventionally, aerosol hair cosmetics used for hair styling generally use the fixing power of the polymer for hair setting to fix the hair, but once the hair is fixed, once the hair style breaks down, the hair is reattached. It is impossible to fix (hereinafter referred to as “re-styling hair”), and the finished hair is stiff or stiff.

  On the other hand, styling agents such as hair wax hold the hair with the adhesive strength of oil, so that the hair can be naturally finished without stiffening and re-styling is possible, but the adhesive strength due to oil is the cause of stickiness It becomes. Moreover, the fixing strength of the hair wax is extremely weak compared to the fixing strength of the hair setting polymer, and it is difficult to maintain the desired hairstyle for a long time.

  Therefore, hair cosmetics containing a hair set polymer and an oil agent and having a certain level of adhesive strength have been proposed as being capable of imparting a natural unit without solidifying the hair and having excellent hairstyle retention ( Patent Document 1). However, since this product does not have sufficient tackiness, there is a problem that it is difficult to maintain a desired hairstyle for a long time because of low re-styling properties.

  In addition, hair makeup using a copolymer of an N-substituted (meth) acrylamide monomer and other unsaturated monomers as a base for hair cosmetics with low tackiness and reduced stickiness. A fee has been proposed (Patent Document 2). However, this technique is intended to keep the tackiness low (paragraph [0003]). In fact, the hair cosmetics described in this document have low tackiness and poor setability. is there.

  Further, as a hair cosmetic capable of re-styling, an aerosol cosmetic comprising a composition containing a hair setting polymer and a polyol solvent in a certain ratio and further containing a specific nonionic surfactant as a plasticizer. (Patent Document 3) A transparent hair cosmetic (Patent Document 4) containing a monovalent branched alcohol, a hair fixing polymer and a specific nonionic surfactant has been proposed. However, these products are not sufficiently tacky, and it is difficult to maintain a desired hairstyle for a long time.

Japanese Patent Laid-Open No. 11-116443 JP 2006-199664 JP 2005-68134 A JP 2002-201116

  Accordingly, an object of the present invention is to provide a hair cosmetic that is excellent in setability and re-styling properties, is sticky, and has a small residual amount after washing.

  The present inventors have found that a hair cosmetic comprising a combination of a specific hair set polymer and a specific plasticizer satisfies the above requirements.

  The present invention comprises a hair cosmetic comprising the following components (A) and (B), having two or more hydroxyl groups, a molecular weight of 62 to 1000, and a content of a liquid compound at 30 ° C. of less than 1% by mass. Is to provide.

(A) One or more copolymers selected from (A1) and (A2)
(A1) Copolymer obtained from a monomer mixture containing the following monomers (a) to (d)
(a) (Meth) acrylamide monomer represented by general formula (1): 30 to 80% by mass

[Wherein R ¹ represents a hydrogen atom or a methyl group, and R ² and R ³ are the same or different and represent a hydrogen atom or an alkyl group having 4 to 12 carbon atoms, but R ² and R ³ are both hydrogen atoms and Never become. ]
(b) (Meth) acrylamide monomer represented by general formula (2): 2 to 50% by mass

[Wherein, R ¹ represents the same as described above, and R ⁴ and R ⁵ 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 (3): 0 to 30% by mass

[Wherein, R ¹ represents the same as described above, R ⁶ represents an alkylene group having 2 or 3 carbon atoms, and R ⁷ and R ⁸ 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 general formula (4): 0 to 40% by mass

[Wherein, R ¹ represents the same as described above, R ⁹ and R ¹⁰ are the same or different and represent an alkylene group having 2 to 4 carbon atoms, R ¹¹ 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 (5): 30 to 80% by mass

[Wherein, R ¹² represents a hydrogen atom or a methyl group, and R ¹³ and R ¹⁴ are the same or different and represent a hydrogen atom or an alkyl group having 4 to 12 carbon atoms, or R ¹³ and R ¹⁴ are combined together. Forms a ring with adjacent nitrogen atoms. ]
(f) (Meth) acrylic acid ester monomer represented by general formula (6): 5 to 45% by mass

[Wherein, R ¹² represents the same as described above, and R ¹⁵ represents an alkyl group having 1 to 4 carbon atoms. ]
(g) (Meth) acrylic acid ester monomer or (meth) acrylamide monomer represented by general formula (7): 2 to 30% by mass

[Wherein, R ¹² represents the same as described above, R ¹⁶ represents an alkylene group having 2 or 3 carbon atoms, and R ¹⁷ and R ¹⁸ 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 (8): 0 to 30% by mass

[Wherein, R ¹² represents the same as described above, R ¹⁹ and R ²⁰ are the same or different and represent an alkylene group having 2 to 4 carbon atoms, and R ²¹ 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. ]
(B) Nonionic surfactant containing two or more hydroxyl groups

  The hair cosmetic composition of the present invention is excellent in setting property and re-styling property, is sticky, and has little residual feeling after washing.

Among the copolymers of the component (A) used in the present invention, the (a) (meth) acrylamide monomer represented by the general formula (1) in (A1) includes, for example, Nn-butyl (meth) acrylamide, N -tert-butyl (meth) acrylamide, N-octyl (meth) acrylamide, N-lauryl (meth) acrylamide, N-1-methylundecyl (meth) acrylamide, N-2-ethylhexyl (meth) acrylamide, N-tert -Octyl (meth) acrylamide is mentioned. Of these, N-branched alkyl (meth) acrylamides such as N-tert-butyl (meth) acrylamide, N-tert-octyl (meth) acrylamide, and N-2-ethylhexyl (meth) acrylamide are particularly preferable.
These are used alone or in combination of two or more, and are used in an amount of 30 to 80% by mass, preferably 40 to 70% by mass, based on the whole monomer.

(b) Examples of (meth) acrylamide monomers represented by the general formula (2) include (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, and N-isopropyl (meth) acrylamide. , N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide. Among these, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, and N, N-diethyl (meth) acrylamide are particularly preferable.
These are used alone or in combination of two or more, and are used in an amount of 2 to 50% by mass, preferably 10 to 35% by mass, based on the whole monomer.

(c) Examples of (meth) acrylic acid ester and (meth) acrylamide monomers represented by the general formula (3) include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) ) Acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylamide, and N, N-diethylaminopropyl (meth) acrylamide.
Any of these may be used alone or in combination of two or more, and may be used in an amount of 0 to 30% by mass, preferably 0 to 10% by mass, and more preferably 0.5 to 5% by mass based on the entire monomer.

Further, (d) the monomer represented by the general formula (4) is a (meth) acrylic acid ester having a polyoxyalkylene chain. R ¹¹ in the formula is preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and most preferably a methyl group. Examples of the (meth) acrylic acid ester monomer (4) include hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, methoxypolyethylene glycol mono (Meth) acrylate, methoxypolypropylene glycol mono (meth) acrylate, ethoxypolyethylene glycol mono (meth) acrylate, butoxypolyethyleneglycol mono (meth) acrylate, and phenoxypolyethyleneglycol mono (meth) acrylate. The polyoxyalkylene chain is a homopolymer or copolymer of C _2-4 alkylene oxide, and in the case of a copolymer, it may be a block copolymer such as ethylene oxide or propylene oxide, or a random copolymer. The degree of polymerization of the alkylene oxide can be analyzed by gas chromatography, and an average value of 1 to 50 is preferred.
Any of these may be used alone or in combination of two or more, and may be used in an amount of 0 to 40% by mass, preferably 5 to 30% by mass, and more preferably 10 to 25% by mass based on the entire monomer.

As the copolymer of (A1),
N-tert-butyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate,
N-tert-butyl (meth) acrylamide / N-methyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / methoxy polyethylene glycol (meth) acrylate,
N-tert-butyl (meth) acrylamide / N-methyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxy polyethylene glycol (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide,
N-tert-octyl (meth) acrylamide / N, N-diethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate,
N-tert-octyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / 2-hydroxyethyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-diethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate is preferred,
N-tert-butyl (meth) acrylamide / N, N-dimethyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate is particularly preferred.

Examples of (e) (meth) acrylamide monomers represented by general formula (5) in (A2) include (meth) acrylamide, Nn-butyl (meth) acrylamide, and N-tert-butyl (meth) acrylamide. , N-octyl (meth) acrylamide, N-lauryl (meth) acrylamide, (meth) acryloylmorpholine, among others N-butyl (meth) acrylamide, N-octyl (meth) acrylamide, N-lauryl (meth) acrylamide Is particularly preferred.
These are used alone or in combination of two or more, and are used in an amount of 30 to 80% by mass, preferably 40 to 70% by mass, based on the whole monomer.

(f) As the (meth) acrylic acid ester monomer represented by the general formula (6), for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, (meth) acrylic acid Butyl is mentioned.
These are used alone or in combination of two or more, and are used in an amount of 5 to 45% by mass, preferably 10 to 40% by mass, based on the whole monomer.

(g) Examples of (meth) acrylic acid ester and (meth) acrylamide monomers represented by the general formula (7) include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) ) Acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylamide, and N, N-diethylaminopropyl (meth) acrylamide.
These are used alone or in combination of two or more, and are used in an amount of 2 to 30% by mass, preferably 5 to 20% by mass, based on the whole monomer.

Examples of (h) (meth) acrylic acid ester monomers represented by the general formula (8) include, for example, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol Examples thereof include mono (meth) acrylate, methoxypolyethylene glycol mono (meth) acrylate, and methoxypolypropylene glycol mono (meth) acrylate. The polyoxyalkylene chain is a homopolymer or copolymer of C _2-4 alkylene oxide, and in the case of a copolymer, it may be a block copolymer such as ethylene oxide or propylene oxide, or a random copolymer. The degree of polymerization of the alkylene oxide can be analyzed by gas chromatography, and an average value of 1 to 50 is preferred.
Any of these may be used alone or in combination of two or more, and may be used in an amount of 0 to 30% by mass, preferably 5 to 15% by mass, based on the entire monomer.

As a copolymer of (A2),
N-tert-butyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate / ethyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate / ethyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate / methyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-diethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate / ethyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate / ethyl (meth) acrylate,
N-tert-octyl (meth) acrylamide / N, N-dimethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate / n-butyl (meth) acrylate,
N-tert-octyl (meth) acrylamide / N, N-diethylaminoethyl (meth) acrylate / methoxypolyethylene glycol (meth) acrylate / n-butyl (meth) acrylate,
N-tert-butyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / ethyl (meth) acrylate is preferred,
N-tert-butyl (meth) acrylamide / N, N-dimethylaminopropyl (meth) acrylamide / methoxypolyethylene glycol (meth) acrylate / ethyl (meth) acrylate is particularly preferred.

  The copolymers of (A1) and (A2) are each described in, for example, Japanese Patent Application Laid-Open No. 8-291206 or Japanese Patent Application Laid-Open No. 2-180911, using a monomer mixture obtained by combining the above monomers. It can be manufactured by the method.

  The weight average molecular weight (by gel filtration chromatography (polyethylene glycol equivalent)) of the obtained copolymer can be controlled to 1,000 to 1,000,000 by selecting the polymerization conditions. In the present invention, the weight average molecular weight is 10,000 to 500,000, particularly 20,000. ~ 200,000 are preferred.

  The copolymer thus obtained can be used by neutralizing its tertiary amino group with an inorganic acid or an organic acid in order to impart water solubility. In this case, it is preferable to neutralize 50% or more of all tertiary amino groups.

  Examples of inorganic acids include hydrochloric acid, sulfuric acid, and phosphoric acid; examples of organic acids include acetic acid, glycolic acid, dimethyl glycolic acid, lactic acid, dimethylolpropionic acid, tartaric acid, citric acid, maleic acid, and malic acid. It is done.

  The amino group in the copolymer can also be quaternized using an appropriate quaternizing agent. In this case, it is preferable to quaternize 50% or more of all tertiary amino groups.

  Examples of the quaternizing agent include dialkyl sulfates such as dimethyl sulfate and diethyl sulfate; alkyl halides such as methyl chloride, propyl bromide and benzyl chloride, and aralkyl halides.

  Such a quaternized copolymer can also be obtained by a method in which the monomer (3) or (7) is quaternized with a quaternizing agent and then copolymerized.

  As the copolymer of the component (A), one or more selected from (A1) and (A2) can be used, and 0.3 to 10% by mass, particularly 0.5 to 8% by mass, in the total composition of the hair cosmetic. Further, the content of 0.7 to 7% by mass is preferable for obtaining a high setting force and resetting property. In the case where the hair cosmetic composition of the present invention is an aerosol hair cosmetic composition comprising an aerosol stock solution and a propellant, as far as the content of each component is concerned, “total composition” means the entire aerosol stock solution containing no propellant. It shall mean the composition.

  Ingredient (B) is one that causes tackiness when mixed with ingredient (A) as a plasticizer. Component (B) includes sorbitan fatty acid esters such as sorbitan monooleate and sorbitan monolaurate; polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monopalmitate Polyoxyalkylene sorbitan fatty acid esters such as isostearyl glyceryl ether, monoalkyl glyceryl ethers such as isodecyl glyceryl ether; fatty acid polyoxyethylene sorbits such as tetraoleic acid polyoxyethylene sorbit.

  The content of the component (B) is preferably 1 to 30% by mass, more preferably 1.6 to 16% by mass, and particularly preferably 2 to 10% by mass in the total composition from the viewpoint of obtaining high setting power and re-styling properties.

  In addition, the content ratio of the component (A) and the component (B) is (B) / (A) = 35/65 to 65/35, particularly 45 / It is preferable to adjust to the range of 55-60 / 40.

  The hair cosmetic composition of the present invention needs to have two or more hydroxyl groups, a molecular weight of 62 to 1000, and a content of a liquid compound at 30 ° C. of less than 1% by mass. It is preferable that the content of such a liquid compound is less than 0.5% by mass, and further it is preferable not to contain such a liquid compound. In a more preferred embodiment, a range containing a compound having a higher molecular weight, that is, containing a liquid compound having two or more hydroxyl groups and having a molecular weight of 62 to 2000, more preferably 62 to 3000, and further 62 or more. The amount is preferably suppressed to less than the above concentration. The term “liquid” as used herein refers to a state where the viscosity measured by a Brookfield type rotational viscometer (rotor No. 2, rotational speed 12 rpm, 60 seconds, 30 ° C.) is 1000 mPa · s or less.

  Such compounds include propylene glycol (molecular weight 76.1), 1,3-butylene glycol (molecular weight 90.1), glycerin (molecular weight 92.1), isopentylene glycol (molecular weight 104.1), hexylene glycol (molecular weight 118.2), dipropylene glycol ( Molecular weight 134.2), polypropylene glycol (polymerization degree 9, molecular weight 540), polyethylene glycol 600 and the like.

  The hair cosmetic composition of the present invention may further contain a small amount of polyoxyalkylene alkyl ether or polyoxyalkylene hydrogenated castor oil that is solid at 30 ° C. as component (C). This component (C) functions as a plasticizer like the component (B), but avoids a decrease in adhesiveness due to the precipitation of the component (C) itself over time, and is excellent in set holding and re-styling. In view of the above, the mass ratio (C) / (B) of the content of the component (C) to the content of the component (B) is 0 to 1, more preferably 0 to 0.8, still more preferably 0 to Limited to 0.6.

  Moreover, the mass ratio [(B) + (C)] / (A) of the total content of the component (B) and the component (C) to the content of the component (A) obtains a high setting power and re-styling property. From the viewpoint, 0.8 to 3, more preferably 0.9 to 2.5, and particularly preferably 1-2.

  Among these components (C), solid polyoxyalkylene alkyl ethers at 30 ° C. include polyoxyethylene lauryl ether (addition mole number 12 or more), polyoxyethylene polyoxypropylene (4) cetyl ether (addition of polyoxyethylene) Mole number 20 or more) polyoxyethylene oleyl ether (addition mole number 30 or more), polyoxyethylene alkyl (sec-C11-15) ether (addition mole number 30 or more), polyoxyethylene alkyl (sec-C12-14) ether (Addition mole number 30 or more) etc. are mentioned, As polyoxyalkylene hydrogenated castor oil solid at 30 degreeC, polyoxyethylene hydrogenated castor oil (addition mole number 60 or more) etc. are mentioned. Specifically, polyoxyethylene (12) lauryl ether, polyoxyethylene (30) oleyl ether, polyoxyethylene (10) cetyl ether, polyoxyethylene (6) stearyl ether, polyoxyethylene (13) cetyl-stearyl Ether, polyoxyethylene (20) polyoxypropylene (4) cetyl ether, polyoxyethylene (30) alkyl (sec-C11-15), polyoxyethylene (30) alkyl (sec-C12-14) ether, etc. Among the component (C), the polyoxyalkylene hydrogenated castor oil that is solid at 30 ° C. includes polyoxyethylene (60) hydrogenated castor oil, polyoxyethylene (80) hydrogenated castor oil, polyoxyethylene (100) hydrogenated castor oil. Examples include oil.

  The hair cosmetic composition of the present invention can further contain a small amount of a monovalent aliphatic branched alcohol having 14 to 20 carbon atoms as the component (D), but the adhesiveness is reduced due to separation from the component (A). The mass ratio (D) / (A) of the content of the component (D) to the content of the component (A) is from 0 to It is limited to 0.2, more preferably 0 to 0.1, still more preferably 0 to 0.05.

  Examples of the component (D) include isomyristyl alcohol, isopalmityl alcohol, isostearyl alcohol, and isoaralkyl alcohol.

  The hair cosmetic composition of the present invention preferably further contains ethanol and / or water as a solvent. These contents are preferably 4 to 98.4% by mass in the total composition, more preferably 30 to 98% by mass, from the viewpoint of improving the solubility and spraying state of the copolymer and plasticizer contained in the cosmetic. 50-95 mass% is especially preferable.

The hair cosmetic composition of the present invention includes various components used in normal hair cosmetics, such as cationic surfactants, anionic surfactants, nonionic surfactants other than those described above, amphoteric surfactants, pH adjustment. Agents, vitamins, proteins, amino acids, herbal medicines, preservatives, ultraviolet absorbers, antioxidants, colorants and the like can be contained according to the purpose.

The hair cosmetic composition of the present invention can be applied as an aerosol spray, pump spray, aerosol foam, pump foam, hair wax, set lotion and the like.

  When the hair cosmetic composition of the present invention is an aerosol hair cosmetic composition, a propellant is further used. Aerosol hair cosmetics are manufactured by filling a pressure-resistant container with components other than a propellant (hereinafter referred to as a stock solution) and a propellant.

  Examples of the propellant include liquefied petroleum gas (LPG), dimethyl ether (DME), carbon dioxide gas, nitrogen gas, and mixtures thereof. Alternatively, alternative CFCs such as HFC-152a can be used. In order to obtain good jetting properties and adhesive properties, as well as good workability, hair styling properties, and re-styling properties, the amount of the propellant is the stock solution / propellant mass ratio: stock solution / propellant = 5 / 95-80 / 20, further 30/70 to 70/30, more preferably 40/60 to 60/40. In order to obtain good jetting characteristics and good adhesive characteristics, the pressure in the pressure vessel is preferably adjusted to be 0.12 to 0.45 MPa at a temperature of 20 ° C.

  The stock solution has a viscosity of 15 mPa · s or less, particularly 10 mPa · s or less, at 30 ° C., in order to eject the stock solution as fine droplets. Here, the viscosity is a value measured by a Brookfield viscometer (rotor BL adapter, rotation speed 30 rpm, 60 seconds, 30 ° C.).

  The valve used in the pressure vessel preferably has a stem diameter of 0.33 to 0.46 mm, a housing diameter of 0.33 to 0.65 mm, and a vapor tap diameter of 0 to 0.64 mm. In the prescription system containing water, it is particularly preferable that the stem diameter is 0.33 to 0.42 mm, the housing diameter is 0.33 to 0.42 mm, and there is no vapor tap, and in the non-aqueous system, particularly the stem diameter is φ0.40 to 0.46 mm, the housing diameter is φ0. .42 to 0.65 mm × vapor tap diameter φ0.33 to 0.46 mm is preferable.

Examples 1-3
A hair cosmetic composition having the composition shown in Table 1 was sealed in a container to obtain a pump spray (using a sprayer Z-155-120 manufactured by Mitani Valve Co., Ltd.). The obtained pump spray was evaluated for “setting property”, “resetting property”, “no stickiness”, and “no residual feeling after washing the hair”. The results are also shown in Table 1.

● "Setability", "No stickiness", "Re-hairing"
(Evaluation methods)
Ten professional panelists set their hair using each pump spray and performed a sensory evaluation on "setability" and "no stickiness".
Furthermore, after hair styling, after 9 hours in an environment of 25 ° C. and 65%, sensory evaluation was also performed for “re-hair styling”. The evaluation was performed according to the following criteria, and was shown as the average value of 10 evaluation points.

(Evaluation criteria)
5: Very good.
4: Good.
3: Slightly good.
2: Slightly bad.
1: Bad.

● “No residual feeling after washing hair”
Ten professional panelists set hair using each pump spray and dried thoroughly, then washed the hair using shampoo, rinsed thoroughly, and dried with a hair dryer. The residual feeling of the agent in the feel of the hair at this time was evaluated. The evaluation was performed according to the following criteria, and the average value of 10 evaluation points was shown.

(Evaluation criteria)
5: There is no residual feeling.
4: There is almost no residual feeling.
3: Although there is a slight residual feeling, it is not uncomfortable.
2: There is a feeling of persistence and is somewhat uncomfortable.
1: Residual feeling and very uncomfortable.

Examples 4-11 and Comparative Examples 1-3
According to a conventional method, a hair spray stock solution shown in Table 2 is prepared, filled with an LPG (0.15 MPa, 20 ° C.) as a propellant into an aerosol container having the following valves and buttons, and an aerosol hair cosmetic (hair spray). ) Was manufactured. The pressure in the container was 0.23 MPa at 20 ° C.
Valve: Stem diameter φ0.41mm, Housing diameter φ0.64mm x Vapor tap diameter φ0.41mm
Button: caliber φ0.46mm (MB, cape)
(Nippon Precision Valve)

  The aerosol hair cosmetics shown in Table 2 were evaluated in the same manner as in Examples 1 to 3 in terms of “setting properties”, “re-hair styling properties”, “no stickiness”, and “no residual feeling after shampooing”. The results are also shown in Table 2.

Claims (4)

A hair cosmetic composition comprising the following components (A) and (B), having two or more hydroxyl groups, a molecular weight of 62 to 1000, and a content of a liquid compound at 30 ° C. of less than 1% by mass.
(A) One or more copolymers selected from (A1) and (A2)
(A1) Copolymer obtained from a monomer mixture containing the following monomers (a) to (d)
(a) (Meth) acrylamide monomer represented by general formula (1): 30 to 80% by mass

[Wherein R ¹ represents a hydrogen atom or a methyl group, and R ² and R ³ are the same or different and represent a hydrogen atom or an alkyl group having 4 to 12 carbon atoms, but R ² and R ³ are both hydrogen atoms and Never become. ]
(b) (Meth) acrylamide monomer represented by general formula (2): 2 to 50% by mass

[Wherein, R ¹ represents the same as described above, and R ⁴ and R ⁵ 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 (3): 0 to 30% by mass

[Wherein, R ¹ represents the same as described above, R ⁶ represents an alkylene group having 2 or 3 carbon atoms, and R ⁷ and R ⁸ 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 general formula (4): 0 to 40% by mass

[Wherein, R ¹ represents the same as described above, R ⁹ and R ¹⁰ are the same or different and represent an alkylene group having 2 to 4 carbon atoms, R ¹¹ 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 (5): 30 to 80% by mass

[Wherein, R ¹² represents a hydrogen atom or a methyl group, and R ¹³ and R ¹⁴ are the same or different and represent a hydrogen atom or an alkyl group having 4 to 12 carbon atoms, or R ¹³ and R ¹⁴ are combined together. Forms a ring with adjacent nitrogen atoms. ]
(f) (Meth) acrylic acid ester monomer represented by general formula (6): 5 to 45% by mass

[Wherein, R ¹² represents the same as described above, and R ¹⁵ represents an alkyl group having 1 to 4 carbon atoms. ]
(g) (Meth) acrylic acid ester monomer or (meth) acrylamide monomer represented by general formula (7): 2 to 30% by mass

[Wherein, R ¹² represents the same as described above, R ¹⁶ represents an alkylene group having 2 or 3 carbon atoms, and R ¹⁷ and R ¹⁸ 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 (8): 0 to 30% by mass

[Wherein, R ¹² represents the same as described above, R ¹⁹ and R ²⁰ are the same or different and represent an alkylene group having 2 to 4 carbon atoms, and R ²¹ 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. ]
(B) Nonionic surfactant containing two or more hydroxyl groups   The hair cosmetic according to claim 1, wherein the content ratio of the component (A) and the component (B) is (B) / (A) = 35/65 to 65/35 in mass ratio.   The hair cosmetic according to claim 1 or 2, further comprising an aerosol-type hair cosmetic containing a propellant.   The hair cosmetic composition according to claim 3, wherein the mass ratio of the component other than the propellant (stock solution) and the propellant in the aerosol hair cosmetic composition is undiluted solution / propellant = 5 / 95-80 / 20.