JP6723772B2 - Hairdressing composition - Google Patents

Description

The present invention relates to a hair styling composition, and more particularly to a hair styling composition using emulsion-polymerized resin particles of an acrylic monomer and silica, which are suitable for aqueous hair styling agents such as hair spray, hair mist, hair set lotion and hair gel.

There are various hair styling agents such as liquid, gel, foam, mist, cream and wax.
Conventionally, as a hair styling agent, for example, a polymer (setting polymer) for maintaining a desired shape by forming a film on the hair surface as a main component, and an additive or agent added for various purposes A polymer composition in which a solvent, a base, and the like to be mixed according to the mold is mixed is known. Further, in recent years, hair creams and hair waxes, which are emulsifiers using an oil and water, are mainly used as hair styling agents in recent years as hair styling products that can be freely arranged during hair styling and can be easily reconditioned after hair styling. Has become.

And a hair styling agent is required to have a performance of imparting a desired shape to hair and holding it for a long time, and a performance of styling (conditioning hair) such as excellent appearance performance and excellent tactile performance, and various hair styling products are required. Agents are being developed.

For example, in Patent Document 1, hair containing (A) polymer fine particles insoluble in water and ethanol and having tackiness at room temperature, and (B) fine powder insoluble in water and ethanol and not having tackiness at room temperature It is disclosed that the cosmetic composition has excellent hair styling properties, good combing and non-greasy feel, and long-lasting effect.

JP-A-2000-26246

However, in terms of hair styling, there are various things such as those for the purpose of natural finish such as good cohesion of hair, those for the purpose of setting up and arranging such as start-up and hair bundle feeling. However, Patent Document 1 aims at the natural finish of the former, and is not sufficiently satisfactory in terms of the settability and arrangement of the latter.
Further, in Patent Document 1, "flaking", in which white matter such as dandruff is observed on hair due to aggregates of resins, additives, etc., has not been sufficiently studied.

Therefore, it is an object of the present invention to provide a hair styling composition which is excellent in hair styling properties (launching power, hair bundle feeling), has little stickiness, and has very little flaking.

As a result of intensive studies in view of the above-mentioned circumstances, as a base material for a hair styling agent, by using emulsion-polymerized resin particles of an acrylic monomer having a specific particle size and particle size ratio, and silica particles, hair styling properties (starting property, A hair styling composition with excellent hair tressing) and less stickiness. Especially, by adjusting the addition ratio, it is possible to suppress fusion and film formation of resin particles and agglomeration of silica particles, resulting in very little flaking. It was found that it can be obtained.

That is, the present invention includes the following aspects (1) to (5).
(1) Acrylic monomer emulsion-polymerized resin particles (A) and silica (B) are contained, and the average particle diameter L(A) of the acrylic monomer emulsion-polymerized resin particles (A) and the silica (B) are The hair styling composition is characterized in that the average particle diameter L(B) is 1000 nm or less and the ratio L(A)/L(B) is 1/2 to 100/1.
(2) The content of the silica (B) is 10 to 250 parts by mass with respect to 100 parts by mass of the emulsion-polymerized resin particles (A) of the acrylic monomer. Hairdressing composition.
(3) The hair styling composition as described in (1) or (2) above, wherein the emulsion-polymerized resin particles (A) of the acrylic monomer have a glass transition temperature of −60 to 20° C.
(4) The hair styling composition as described in any one of (1) to (3) above, wherein the silica (B) has an average particle diameter L(B) of 1 to 500 nm.
(5) The average particle diameter L(A) of the emulsion-polymerized resin particles (A) of the acrylic monomer is 30 to 1000 nm, according to any one of (1) to (4) above. Hairdressing composition.

According to the present invention, the emulsion-polymerized resin particles (A) of the acrylic monomer and the silica (B) are contained, and the average particle diameter L(A) and the silica (B) of the emulsion-polymerized resin particles (A) of the acrylic monomer are contained. Have an average particle size L(B) of 1000 nm or less and a ratio L(A)/L(B) of 1/2 to 100/1, so that the hair styling property (starting force, hair bundle) It is possible to provide a hair styling composition which is excellent in feeling, has less stickiness, and very little flaking.

Hereinafter, embodiments of the present invention will be described in detail.
In the present specification, an acrylic resin is a resin obtained by polymerizing a monomer component containing at least one (meth)acrylic monomer, and (meth)acrylic means acrylic or methacrylic (meth). Acrylate means acrylate or methacrylate, and (meth)acrylic acid means acrylic acid or methacrylic acid.

The hair styling composition of the present invention contains emulsion-polymerized resin particles (A) of an acrylic monomer and silica (B), and the average particle diameter L(A) of the emulsion-polymerized resin particles (A) of an acrylic monomer and silica ( The average particle size L(B) of B) is 1000 nm or less, and the ratio L(A)/L(B) is 1/2 to 100/1.
In the present invention, the emulsion-polymerized resin particles (A) of the acrylic monomer improve the dispersibility of the fine silica (B) to improve the hair styling property and suppress stickiness, and also the emulsion-polymerized resin particles (A) of the acrylic monomer. ) And fine silica (B) have a specific particle diameter ratio, the emulsion-polymerized resin particles (A) and silica (B) of the acrylic monomer cover each other, and the emulsion-polymerized resin of the acrylic monomer It is presumed that flaking can be effectively reduced by suppressing the aggregation of particles (A) and silica (B).

Hereinafter, each component will be specifically described.

<Emulsion polymerized resin particles (A) of acrylic monomer>
The emulsion-polymerized resin particles (A) of an acrylic monomer used in the present invention (hereinafter, also simply referred to as “emulsion-polymerized resin particles (A)”) are acrylic resin obtained by emulsion-polymerizing an acrylic monomer in an aqueous medium. The resin particles are particles having a particle diameter of 1000 nm or less.

Examples of the acrylic monomer include methyl(meth)acrylate, ethyl(meth)acrylate, n-butyl(meth)acrylate, i-butyl(meth)acrylate, t-butyl(meth)acrylate, 2-ethylhexyl( Aliphatic (meth)acrylate monomers such as (meth)acrylate, cyclohexyl (meth)acrylate, lauryl (meth)acrylate, octyl (meth)acrylate, stearyl (meth)acrylate, and aromatics such as phenoxy (meth)acrylate Examples thereof include (meth)acrylate-based monomers and trifluoroethyl (meth)acrylate.
Of these, an aliphatic (meth)acrylate-based monomer having an alkyl group with 1 to 18 carbon atoms is preferable, and an alkyl group with 1 carbon atom is more preferable, because emulsion polymerization is easy and copolymerization is easy. To 12 aliphatic (meth)acrylate monomers, more preferably alkyl group having 4 to 12 carbon atoms (meth)acrylate monomers, particularly preferably n-butyl acrylate and 2-ethylhexyl. It is an acrylate. In addition, a combination of 2-ethylhexyl acrylate and methyl methacrylate and a combination of n-butyl acrylate and methyl methacrylate can be preferably used.

The emulsion-polymerized resin particles (A) of the present invention may be copolymerized with a functional group-containing monomer other than an acrylic monomer, and the functional group-containing monomer may be, for example, a monomer having two or more vinyl groups in its molecular structure. , Glycidyl group-containing monomers, allyl group-containing monomers, hydrolyzable silyl group-containing monomers, acetoacetyl group-containing monomers, hydroxyl group-containing monomers, carboxyl group-containing monomers and the like.

Examples of the monomer having two or more vinyl groups in the molecular structure include divinylbenzene, diallyl phthalate, triallyl cyanurate, triallyl isocyanurate, ethylene glycol di(meth)acrylate, 1,2-propylene glycol di( (Meth)acrylate, 1,3-propylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, tri Methylolpropane tri(meth)acrylate, allyl(meth)acrylate and the like can be mentioned.
Among these, ethylene is preferred because the adhesive strength between the acrylic resin particles in the emulsion-polymerized resin particles (A) can be reduced and the hardness (touch) of the film on the hair can be easily adjusted. Glycol di(meth)acrylate, 1,2-propylene glycol di(meth)acrylate, 1,3-propylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di (Meth)acrylate, neopentyl glycol di(meth)acrylate and trimethylolpropane tri(meth)acrylate are preferable.

Examples of the glycidyl group-containing monomer include glycidyl (meth)acrylate, glycidyl (meth)allyl ether, and 3,4-epoxycyclohexyl (meth)acrylate.

Examples of the allyl group-containing monomer include triallyloxyethylene, diallyl maleate, triallyl cyanurate, triallyl isocyanurate, tetraallyloxyethane, and other monomers having two or more allyl groups, allyl glycidyl ether, and allyl acetate. Etc.

Examples of the hydrolyzable silyl group-containing monomer include vinyl-based silyl group-containing monomers such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, and vinylmethyldimethoxysilane; γ-(meth) (Meth)acryloxy system such as acryloxypropyltrimethoxysilane, γ-(meth)acryloxypropylmethyldimethoxysilane, γ-(meth)acryloxypropyltriethoxysilane, γ-(meth)acryloxypropylmethyldiethoxysilane Examples include silyl group-containing monomers.
Among the hydrolyzable silyl group-containing monomers, vinyl is preferable because it can reduce the fusion strength between the emulsion-polymerized resin particles (A) and can easily adjust the hardness (feeling) of the film on the hair. It is preferable to use trimethoxysilane, vinyltriethoxysilane, or γ-(meth)acryloxypropyltrimethoxysilane.
Further, in terms of excellent copolymerizability with the (meth)acrylate-based monomer, it is preferable to use the (meth)acryloxy-based silyl group-containing monomer.

Examples of the acetoacetyl group-containing monomer include acetoacetic acid vinyl ester, acetoacetic acid allyl ester, diacetoacetic acid allyl ester, acetoacetoxyethyl (meth)acrylate, acetoacetoxyethyl crotonate, acetoacetoxypropyl (meth)acrylate, acetoacetoxy. Examples include propyl crotonate and 2-cyanoacetoacetoxyethyl (meth)acrylate.

Examples of the hydroxyl group-containing monomer include (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate.

Examples of the carboxyl group-containing monomer include (meth)acrylic acid, acrylic acid dimer, crotonic acid, maleic acid, maleic anhydride, fumaric acid, citraconic acid, glutaconic acid, itaconic acid, acrylamide-N-glycolic acid, and silicic acid. Examples include cinnamic acid.
Among these, (meth)acrylic acid is preferably used from the viewpoint that emulsion stability during emulsion polymerization is imparted and high dispersibility of silica (B) can be obtained.

These monomers may be used alone or in combination of two or more.

In the monomer component constituting the emulsion-polymerized resin particles (A), the content ratio of the acrylic monomer is 80 to 100% by mass based on the whole monomer components constituting the emulsion-polymerized resin particles (A). The content is preferably 85 to 99.99 mass%, more preferably 90 to 99.9 mass%.
If the content ratio of such an acrylic monomer is too low, the production stability during emulsion polymerization tends to decrease.

In the monomer component constituting the emulsion-polymerized resin particles (A), the content ratio of the functional group-containing monomer is 0 to 20 mass% with respect to the entire monomer components constituting the emulsion-polymerized resin particles (A). Is more preferable, 0.01 to 15 mass% is more preferable, and 0.1 to 10 mass% is still more preferable.
If the content ratio is too high, the production stability during emulsion polymerization tends to decrease, and if it is too low, flaking tends to occur.

Moreover, when the functional group-containing monomer is a monomer having two or more vinyl groups in the molecular structure, the content of the monomer having two or more vinyl groups in the molecular structure is the same as that of the emulsion-polymerized resin particles (A). It is preferably 0.01 to 20% by mass, more preferably 0.05 to 15% by mass, and still more preferably 0.1 to 10% by mass, based on the entire constituent monomer components.

When the functional group-containing monomer is a hydrolyzed silyl group-containing monomer, the content of the hydrolyzed silyl group-containing monomer is 0.01 with respect to the total monomer components constituting the emulsion-polymerized resin particles (A). It is preferably ˜15% by mass, more preferably 0.02 to 12% by mass, still more preferably 0.05 to 10% by mass.

In addition, as long as the effects of the present invention are not impaired, a small amount of styrene-based monomers such as styrene and α-methylstyrene, and vinyl formate, vinyl acetate, vinyl propionate, and valerin are used as constituent components of the emulsion-polymerized resin particles (A). Vinyl ester monomers such as vinyl acetate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caprate, vinyl laurate, vinyl stearate, vinyl benzoate, vinyl versaticate, vinyl 2-ethylhexanoate, etc. are used. May be.

The emulsion-polymerized resin particles (A) can be obtained as an emulsion by emulsion polymerization. In the emulsion polymerization, known components such as a polymerization initiator, a polymerization modifier and a plasticizer can be used in addition to the emulsifier and the polymerization component.

Examples of the emulsifier include a surfactant, a water-soluble polymer having a protective colloid ability, a water-soluble oligomer and the like.

Preferred examples of the above-mentioned surfactant include anionic surfactants such as sodium lauryl sulfate and sodium dodecylbenzenesulfonate, nonionic surfactants such as those having a pluronic type structure and those having a polyoxyethylene type structure. Examples include activators and cationic surfactants such as amine salt type and quaternary ammonium salt type. Further, as the surfactant, a reactive surfactant having a radical-polymerizable unsaturated bond in the structure can also be used. These can be used alone or in combination of two or more.

Examples of the water-soluble polymer having the protective colloid ability include polyvinyl alcohol, hydroxyethyl cellulose, polyvinyl pyrrolidone, methyl cellulose and the like. These may be used alone or in combination of two or more. These are effective in increasing the viscosity of the emulsion and changing the particle size of the emulsion to change the viscosity.

As the water-soluble oligomer, for example, a polymer or a copolymer having a hydrophilic group such as a sulfonic acid group, a carboxyl group, a hydroxyl group, and an alkylene glycol group is preferable, and a polymer having an average degree of polymerization of about 10 to 500 or Copolymers are preferred. Specific examples of the water-soluble oligomer include, for example, amide-based copolymers such as 2-methacrylamido-2-methylpropanesulfonic acid copolymer, sodium methacrylate-4-styrenesulfonate copolymer, and styrene/maleic acid copolymer. Examples thereof include polymers, melamine sulfonic acid formaldehyde condensates, poly(meth)acrylic acid salts and the like. Further, specific examples include water-soluble oligomers obtained by previously polymerizing a monomer having a sulfonic acid group, a carboxyl group, a hydroxyl group, an alkylene glycol group or the like, or a radically polymerizable reactive emulsifier alone or with another monomer. To be These may be used alone or in combination of two or more.

In the present invention, among the above emulsifiers, sodium lauryl sulfate and sodium dodecylbenzenesulfonate are preferably used from the viewpoint of good polymerization stability.

The amount of the emulsifier used is preferably 0.01 to 15 parts by mass, more preferably 0.1 to 10 parts by mass, and further preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the monomer component constituting the emulsion-polymerized resin particles (A). It is preferably 0.5 to 8 parts by mass.
If the amount of the emulsifier used is too small, the dispersion stability of the monomer component tends to decrease, and the polymerization stability tends to decrease.If the amount used is too large, the viscosity of the emulsion tends to increase and the production stability tends to decrease. There is.

As the above-mentioned polymerization initiator, those which can be used for ordinary emulsion polymerization can be used, and examples thereof include inorganic peroxides such as potassium persulfate, sodium persulfate and ammonium persulfate; organic peroxides, azo initiators, and peroxides. Hydrogen, peroxides such as butyl peroxide; and redox polymerization initiators in which these are combined with reducing agents such as acidic sodium sulfite and L-ascorbic acid. These may be used alone or in combination of two or more.
Among these, a combination of an inorganic peroxide such as a persulfate, an organic peroxide, an azo-based initiator and a reducing agent is preferable, and it is preferable to use a persulfate in terms of easy redox polymerization.

The amount of the polymerization initiator used varies depending on the type of the monomer component used and the polymerization conditions, but is usually 0.01 to 0.5 with respect to 100 parts by mass of the monomer component constituting the emulsion-polymerized resin particles (A). The amount is preferably parts by mass, more preferably 0.05 to 1 part by mass.

The polymerization regulator can be appropriately selected from known ones. Examples of such a polymerization regulator include a chain transfer agent and a buffer.

Examples of the chain transfer agent include alcohols such as methanol, ethanol, propanol and butanol; aldehydes such as acetaldehyde, propionaldehyde, n-butyraldehyde, furfural and benzaldehyde; and dodecyl mercaptan, lauryl mercaptan, normal mercaptan and thiol. Examples thereof include mercaptans such as glycolic acid, octyl thioglycolate, and thioglycerol. These may be used alone or in combination of two or more. The use of the chain transfer agent is effective in that the polymerization can be stably performed, and it is desirable to use the chain transfer agent to adjust the degree of polymerization of the emulsion-polymerized resin particles (A).

Examples of the buffer include sodium acetate, ammonium acetate, dibasic sodium phosphate, sodium citrate and the like. These may be used alone or in combination of two or more.

As the plasticizer, an ethylene glycol plasticizer, an ethylene glycol alkyl ether plasticizer, a benzoate plasticizer, an adipate plasticizer, a phthalic acid plasticizer, a phosphoric acid plasticizer, or the like can be used.

The amounts of these other components used can be appropriately selected according to the purpose within a range that does not impair the effects of the present invention.

Emulsion polymerization is carried out in an aqueous medium in the presence of an emulsifier, the monomer component constituting the emulsion-polymerized resin particles (A) is optionally polymerized together with various components as described above.
(1) A method of charging a reaction vessel with a monomer component, an emulsifier, a polymerization initiator, and if necessary, the total amount of other components, and heating the mixture to perform polymerization.
(2) An aqueous medium, a monomer component, and a part of an emulsifier are charged into a reaction vessel, the temperature is raised, a polymerization initiator is added, and after polymerization, the remaining monomer component and the polymerization initiator are added dropwise or dividedly. A method of continuing the polymerization,
(3) A method in which an aqueous medium, an emulsifier, a polymerization initiator, etc. are charged in a reaction vessel and the temperature is raised, and then all of the monomer components and the polymerization initiator are added dropwise or dividedly and polymerized.
Etc. Among them, the methods (2) and (3) are preferable because the polymerization temperature can be easily controlled.

Here, the aqueous medium refers to water or an alcoholic solvent mainly containing water, and preferably water.

The polymerization conditions in the above-mentioned polymerization method are not particularly limited, but examples thereof include the following conditions.
In the above method (1), a temperature range of about 40 to 100° C. is usually suitable, and it is preferable to carry out the reaction for about 1 to 8 hours after the start of temperature increase.
In the method (2), 1 to 50% by mass of the monomer component and 1 to 50% by mass of the polymerization initiator are polymerized at 40 to 90° C. for 0.1 to 4 hours, and then the remaining monomer component and the remaining It is preferable that the polymerization initiator of 1 is added dropwise or dividedly over about 1 to 5 hours, and then aged at the same temperature for about 1 to 3 hours.
In the above method (3), a polymerization vessel is charged with water and 0 to 100% by mass of a polymerization initiator, the temperature is raised to 40 to 90° C., and a monomer component and the remaining polymerization initiator (when the whole amount is initially charged). Is preferably added dropwise or dividedly over about 2 to 5 hours, and then aged at the same temperature for about 1 to 3 hours.

In the above-mentioned polymerization method, from the viewpoint of polymerization stability, an emulsifier (or a part of the emulsifier) is dissolved in a monomer component constituting the emulsion-polymerized resin particles (A), or emulsified with an emulsifier and an aqueous medium in advance. It is preferable to disperse and maintain the state of an O/W type emulsion.
The method for preparing the emulsion is not particularly limited, but after the emulsifier is dissolved in water, the monomer components constituting the emulsion-polymerized resin particles (A) are charged and the mixture is emulsified with stirring, or the emulsifier is added to water. Examples of the method include a method of charging a monomer component while dissolving and stirring.

Stirring at the time of emulsification of the emulsified liquid can be performed using a homodisper or a stirrer equipped with stirrer blades such as turbine blades and propeller blades.
The temperature at the time of emulsification is not a problem as long as the mixture does not react during the emulsification, and usually about 5 to 60°C is suitable.

The concentration of the emulsion-polymerized resin particles (A) at the time of emulsion polymerization is, for example, from 1 to 70% by mass, preferably from 20 to 65% by mass, from the viewpoint of manufacturing cost reduction of the emulsion and manufacturing stability of the emulsion. It is preferably 30 to 50% by mass. The concentration of the emulsion-polymerized particles (A) can be determined by measuring the non-volatile content in the emulsion, and the non-volatile content means the residue obtained by heating and drying the emulsion, and the weight before and after the heat-drying is usually JIS K. It can be determined according to the calculation method described in 6828-1. The concentration of the emulsion-polymerized particles (A) can be determined by subtracting the weight of other additives from the nonvolatile content.

The average particle diameter L(A) of the emulsion-polymerized resin particles (A) produced as described above is 1000 nm or less, and the lower limit is preferably 30 nm or more. The average particle diameter L(A) is more preferably 60 to 800 nm, further preferably 70 to 600 nm. When the average particle size is 30 nm or more, the resin particle concentration in the emulsion can be increased, and when it is 1000 nm or less, broadening of the particle size distribution can be suppressed, and the storage stability of the emulsion can be improved. can do. When the particle size distribution is broad, the particle size ratio balance with silica (B) is disrupted, and the flaking suppressing effect tends to decrease.

The method for adjusting the average particle size L(A) of the emulsion-polymerized resin particles (A) is not particularly limited, and the type and amount of the emulsifier and the monomer concentration at the time of polymerization are determined depending on the type and properties of the monomer component to be polymerized. It can be adjusted by appropriately combining polymerization conditions such as the stirring speed, the polymerization temperature, the type of the polymerization catalyst, the amount of the polymerization catalyst, the timing of introducing the polymerization catalyst, and the like.

The average particle size L(A) of the emulsion-polymerized resin particles (A) is, when the particle size is less than 500 nm, a dynamic light scattering type particle size distribution measuring device, for example, "NICOMP" manufactured by Particle Sizing Systems. 380" (trade name), and when the particle size is 500 nm or more, laser analysis/scattering particle size distribution analyzer, for example, "LA-950" manufactured by Horiba Ltd. It can be measured by (product name). The measurement of the particle size is a known and commonly used technique.

In the present invention, the glass transition temperature (Tg) of the emulsion-polymerized resin particles (A) is preferably -60 to 20°C. The glass transition temperature (Tg) is more preferably −50 to 10° C., further preferably −40 to −15° C. If the glass transition temperature of the emulsion-polymerized resin particles (A) is too high, the film formed on the hair tends to be brittle and the touch becomes poor, and flaking tends to increase. If the glass-transition temperature is too low, the emulsion-polymerized resin particles (A) The fusion strength between the two becomes large, and flaking due to film peeling during combing tends to deteriorate.

In the present invention, the glass transition temperature (Tg) of the emulsion-polymerized resin particles (A) is calculated by the following Fox equation.

(In the formula, Tg: the glass transition temperature (K) of the polymer formed from the monomer A, the monomer B,..., And the monomer N,
Tga: glass transition temperature (K) of homopolymer of monomer A,
Wa: mass fraction of monomer A,
Tgb: glass transition temperature (K) of homopolymer of monomer B,
Wb: mass fraction of monomer B,
Tgn: glass transition temperature (K) of homopolymer of monomer N,
Wn: mass fraction of monomer N,
However, Wa+Wb+...+Wn=1
Is. )

In the present invention, the method for adjusting the glass transition temperature of the emulsion-polymerized resin particles (A) is not particularly limited, and the glass transition temperature when each homopolymer of the polymerization monomer component to be used is appropriately determined by the Fox equation described above. Then, the composition ratio of the polymerized monomer components may be determined.

<Silica (B)>
The inorganic particles used in the present invention are silica (B). Inorganic particles other than silica (B), such as talc, does not exhibit hair-raising properties such as start-up properties and hair bundle feel, and generally has a large particle size, causing emulsion polymerization resin particles (A) to aggregate and cause flaking. Therefore, it cannot be used as the main component.
The silica (B) used is silicon dioxide (SiO ₂ ) mainly produced from chlorosilanes, sodium silicate and the like. Silica is roughly classified into crystalline silica such as quartz and cristobalite and amorphous silica such as diatomaceous earth. Examples of the amorphous silica include colloidal silica and fumed silica. In the present invention, it is more preferable to use amorphous silica such as colloidal silica and fumed silica because the dispersibility is good.

The average particle diameter L(B) of silica (B) is 1000 nm or less, preferably 1 to 500 nm, more preferably 5 to 500 nm, further preferably 7 to 300 nm, and particularly preferably 8 to 80 nm. is there. If the average particle size of silica (B) is too small, stains and stiffening tend to occur, while if it is too large, flaking tends to occur and hair tends to whiten.

As for the average particle diameter L(B) of silica (B), when the particle diameter is less than 500 nm, a particle size distribution measuring device of a dynamic light scattering method, for example, Particle Sizing Systems “NICOMP 380” (trade name) is used. When the particle size is 500 nm or more, laser measurement/scattering particle size distribution measuring device, for example, "LA-950" (trade name) manufactured by Horiba Ltd. You can The measurement of the particle size is a known and commonly used technique.

As the silica (B) that can be used in the present invention, specifically, "Snowtex 40", "Snowtex XL", "Snowtex YL", "Snowtex ZL" manufactured by Nissan Chemical Industries, Ltd., "Snowtex MP-1040", "Snowtex MP-2040", "Snowtex MP-3040" and "Snowtex MP-4540M", "Quatron PL-1" and "Quatron PL-" manufactured by Fuso Chemical Industry Co., Ltd. 3”, “Quatron PL-7” and “Quatron PL-10H”, and “AEROSIL 200” and “AEROSIL 300” manufactured by Nippon Aerosil Co., Ltd. and the like.

In the present invention, the ratio L(A)/L(B) of the average particle diameter L(A) of the emulsion-polymerized resin particles (A) and the average particle diameter L(B) of the silica (B) is 1/2. ~100/1. L(A)/L(B) is preferably 1/2 to 60/1, more preferably 1/1 to 20/1, and particularly preferably L(A) is larger than L(B). If the particle size ratio of L(A)/L(B) is less than 1/2, the emulsion-polymerized resin particles (A) tend to agglomerate to form a film, causing flaking and the phenomenon that hair looks white. If it is larger than 100/1, the emulsion-polymerized resin particles (A) are too large and the stability tends to be lowered.

<Hairdressing composition>
The hair styling composition of the present invention is characterized by containing emulsion-polymerized resin particles (A) of an acrylic monomer and silica (B).

The content of the emulsion-polymerized resin particles (A) is preferably 0.1 to 30% by mass, more preferably 0.2 to 25% by mass, and 0.3 to 20% by mass in the total amount of the hair styling composition. Is more preferable. When the content of the emulsion-polymerized resin particles (A) is too small, it is difficult to obtain sufficient hair styling performance, and it is difficult to obtain the flaking suppressing effect. When the content is too large, the viscosity is high and the handleability is deteriorated. Or the storage stability tends to decrease.

In the present invention, the content of silica (B) is preferably 10 to 250 parts by mass, more preferably 25 to 200 parts by mass, and 40 to 160 parts by mass with respect to 100 parts by mass of the emulsion-polymerized resin particles (A). Parts are more preferred. If the content of the silica (B) with respect to the emulsion-polymerized resin particles (A) is too small, flaking and hair styling performance tend to deteriorate, and if too large, flaking tends to deteriorate.

The hair styling composition of the present invention may contain other additives as long as the effects thereof are not impaired. As other additives, for example, organic pigments, inorganic pigments, water-soluble additives, pH adjusters, preservatives, antioxidants, oils, polyhydric alcohols, lower alcohols, surfactants, ultraviolet absorbers, fragrances, Antioxidants, humectants, cooling agents, vitamins, plant extracts and the like can be mentioned.

Examples of organic pigments include Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Red No. 201, Red No. 202, Red No. 213, Red No. 214, Red No. 215. , Red 218, Red 223, Red 226, Red 227, Red 230, Red 231, Red 232, Red 401, Red 404, Red 405, Red 501, Red 502, Red 503, Red 504, Red 505, Red 506, Yellow 4, Yellow 5, Yellow 201, Yellow 202, Yellow 203, Yellow 204, Yellow 402, Yellow 403, Yellow 404 , Yellow 405, Yellow 406, Yellow 407, Green 3, Green 201, Green 202, Green 204, Green 205, Green 402, Blue 1, Blue 2, Blue 201, Blue No. 204, Blue No. 205, Blue No. 403, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange No. 206, Orange No. 207, Orange No. 401, Orange No. 402, Orange No. 403, Purple No. 201 , Purple No. 401, black No. 401 and the like. The organic pigment may be a dye such as an acid dye or a basic dye described above, or a lake pigment such as a dye aluminum.

Examples of the inorganic pigments include colored pigments such as iron oxide, ultramarine blue, chromium oxide and carbon black; white pigments such as zinc oxide, titanium oxide and calcium carbonate; extender pigments such as talc, mica and kaolin.

Examples of water-soluble additives include water, ethanol; polyhydric alcohols such as 1,3-butylene glycol and propylene glycol; film-forming polymers such as vinylpyrrolidone-based polymers and polyvinyl alcohol; carboxyvinyl polymers, cellulose ethers and the like. Viscous polymers; moisturizers such as hyaluronic acid, collagen, and pantothenyl alcohol.

Examples of the pH adjuster include, for example, citric acid, lactic acid, glycolic acid, succinic acid, acetic acid, malic acid, tartaric acid, fumaric acid, phosphoric acid, hydrochloric acid, triethanolamine, isopropanolamine, 2-amino-2- Methyl-1,3-propanediol, arginine, sodium hydroxide, potassium hydroxide and the like can be mentioned.

Examples of the preservative include, for example, parabens such as methylparaben, ethylparaben and butylparaben, isopropylmethylphenol, chlorhexidine gluconate solution, trichlorocarbanilide, phenoxyethanol, phenolic acid such as carboxylic acid, hexachlorophene, benzoic acid and the like. Examples thereof include salts, undecylenic acid, salicylic acid, sorbic acid and salts thereof, dehydroacetic acid and salts thereof, Photosensitizer No. 101, Photosensitizer No. 201, Photosensitizer No. 401, hinokitiol, triclosan and the like.

Examples of the antioxidant include dibutylhydroxytoluene, sulfite, and the like.

Examples of the oil include oils and fats such as sunflower oil, cottonseed oil, soybean oil, olive oil, coconut oil, castor oil, jojoba oil, camellia oil, mink oil; beeswax, carnauba wax, candelilla wax, rice bran wax, shellac wax, whale wax, lanolin. And other waxes; cerecin, paraffin wax, liquid paraffin, liquid isoparaffin, microcrystalline wax, polyethylene powder, polyethylene wax, Fischer-Tropsch wax, petrolatum, squalane, and other hydrocarbon oils; lauric acid, myristic acid, palmitic acid, stearin Higher fatty acids such as acids, oleic acid, behenic acid, 2-ethylbutanoic acid, isopentanoic acid, 2-methylpentanoic acid, 2-ethylpentanoic acid, isostearic acid, 12-hydroxystearic acid; lauryl alcohol, myristyl alcohol, cetyl alcohol, Higher alcohols such as stearyl alcohol, oleyl alcohol, lanolin alcohol, behenyl alcohol and cetostearyl alcohol; ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, oleyl oleate, octyldodecyl myristate, oleic acid Octyldodecyl, ethyl isostearate, isopropyl isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl triisopalmitate, pentaerythritol tetra-2-ethylhexanoate, octane Fatty acid ester oils such as isocetyl acid, isostearyl octanoate, isocetyl isostearate, octyldodecyl isostearate, octyldodecyl dimethyloctanoate; methyl polysiloxane, highly polymerized methyl polysiloxane, methylphenyl polysiloxane, octamethyl trisiloxane, decamethyl Silicone oils such as tetrasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, alcohol-modified silicone, alkyl-modified silicone, amino-modified silicone, epoxy-modified silicone, etc. it can. These may be used alone or in combination of two or more.

From the viewpoint of emulsification, the content of such an oil agent is usually preferably 0.5 to 50% by mass, and particularly preferably 1 to 40% by mass in the total amount of the hair styling composition. Further, from the viewpoint of reducing the oiliness and stickiness of the hair styling material, it is preferable that the content is as small as possible, but the emulsion-polymerized resin particles (A) and silica (B) of the acrylic monomer of the present invention are used. Thus, the amount of oil used can be reduced or eliminated.

Examples of the polyhydric alcohol include ethylene glycol, dipropylene glycol, propylene glycol, isoprene glycol, glycerin, diglycerin, 1,3-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1, 2-octanediol, 1,2-decanediol, etc. can be illustrated. These may be used alone or in combination of two or more.

The content of the polyhydric alcohol is preferably 0.1 to 20% by mass, and particularly preferably 0.5 to 15% by mass in the total amount of the hair styling composition from the viewpoint of feeling of use.

The hair styling composition can be obtained by blending emulsion-polymerized resin particles (A) of acrylic monomer and silica (B), and a desired additive in a solvent and uniformly mixing them.

Water is preferably used as the solvent, and examples of water include ion-exchanged water, purified water, and distilled water.

As the mixing conditions, it is sufficient that the components to be blended are uniformly mixed, and it is also possible to stir and mix using an Ultra Disperser, a TK homomixer, or the like. The liquid temperature at the time of mixing may be room temperature (about 25° C.) to 80° C.

The hair styling composition of the present invention is particularly suitable for an aqueous hair styling agent such as a hair spray, a hair mist, a hair setting lotion and a hair gel.

The hair styling composition of the present invention can be used for hair styling as follows, for example.
That is, the hair styling composition of the present invention is applied to the hair in an effective hair styling amount, and the hair is shaped into a desired shape during or before and after the application. By styling hair in this way, a desired hairstyle can be easily formed. The hair styling composition of the present invention has excellent hair styling properties (launching power, hair bundle feeling), little stickiness, and very little flaking.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples as long as the gist thereof is not exceeded. In the examples, "part" and "%" mean mass basis.

First, an acrylic resin emulsion containing emulsion-polymerized resin particles (A) of various acrylic monomers was prepared as follows. The nonvolatile content and viscosity of the acrylic resin emulsion were measured by the following method, and the glass transition temperature was measured by the above method. Moreover, in the average particle diameter L(A) of the emulsion-polymerized resin particles (A) of the acrylic monomer and the average particle diameter L(B) of the silica (B), those having a particle diameter of less than 500 nm are It is a volume average particle diameter obtained when a cumulative fitting is performed on the autocorrelation function measured at a scattering angle of 90° at a temperature of 23° C. by using a scattering method (DLS), and as a measuring device, Particle Sizing Systems, “NICOMP” 380". For particles having a particle size of 500 nm or more and talc, the dispersion liquid was measured using a laser diffraction/scattering particle size distribution measuring device (“LA-950” (trade name) manufactured by Horiba, Ltd.), and the average. The particle size was determined.

<Nonvolatile content>
1 g of the sample is spread on an aluminum foil dish container shaped to have the same bottom area as a flat balance bottle 50 mm×30 mm defined in JIS R 3503 (1994), and the sample is accurately weighed. The container is placed in the center of a constant temperature bath, dried at 105° C.±2° C. for 60±5 minutes, allowed to cool in a desiccator, and its mass is measured.
Then, the nonvolatile content (N) was calculated by the following formula.
N(%)=(Wd/Ws)×100
(In the formula, N is the nonvolatile content (%), Wd is the mass (g) of the sample after drying, and Ws is the mass (g) of the sample before drying.)

<Production Example 1: Preparation of emulsion [1] containing emulsion-polymerized resin particles (A) of acrylic monomer>
Ion-exchanged water (58.9 parts), sodium citrate (0.2 parts) and sodium lauryl sulfate (0.8 parts) were put into a SUS reaction can equipped with a cooling tube and a stirring blade and completely dissolved. Then, the temperature was raised to 75°C.
Ion-exchanged water (50.8 parts), sodium lauryl sulfate (1.6 parts), n-butyl acrylate (65.8 parts), methyl methacrylate (25.1 parts), methacrylic acid (3.0 parts), An emulsified product of ethylene glycol dimethacrylate (6.1 parts) (i) and a 3% KPS (potassium persulfate) aqueous solution (7.9 parts) (ii) were prepared. 10% of (ii) and 25% of (ii) are added, and polymerization is performed for 20 minutes. Further, 90% of the remaining (i) and 75% of (ii) are added dropwise over 3 hours, and polymerization is performed at 78 to 82°C. It was
Five minutes after the completion of dropping, methyl methacrylate (1.0 part) was added and the temperature was maintained for 2 hours.
Then, the mixture was cooled to about 30° C., neutralized with 10% aqueous ammonia to a pH of about 7-9, and filtered through a 150-mesh nylon mesh to obtain an acrylic resin emulsion [1]. The nonvolatile content was 44.5% and the average particle size was 110 nm. The glass transition temperature was -20°C.

<Production Example 2: Preparation of emulsion [2] containing emulsion-polymerized resin particles (A) of acrylic monomer>
Ion-exchanged water (53.0 parts), sodium citrate (0.2 parts) and sodium lauryl sulfate (0.8 parts) were added to a SUS reaction can equipped with a cooling tube and stirring blades and completely dissolved. Then, the temperature was raised to 80°C.
Ion-exchanged water (51.3 parts), sodium lauryl sulfate (1.5 parts), n-butyl acrylate (65.0 parts), methyl methacrylate (26.0 parts), methacrylic acid (3.0 parts), An emulsified product of ethylene glycol dimethacrylate (6.0 parts) (i) and a 3% KPS (potassium persulfate) aqueous solution (8.0 parts) (ii) were prepared. 5% of (ii) and 23% of (ii) were added and polymerized for 20 minutes, and the remaining 95% of (i) and 67% of (ii) were added dropwise over 3 hours and polymerized at 78 to 82°C. It was
After completion of the dropping, the temperature was raised to 88 to 90° C., 10 minutes after the completion of the dropping, 5% of (ii) was added, the temperature was kept for 35 minutes, and 5% of (ii) was further added, The temperature was held for 45 minutes.
Thereafter, the mixture was cooled to 55 to 60° C., and 1.6 parts of a 10% aqueous solution of tertiary butyl hydroperoxide (“Perbutyl H-69” manufactured by NOF CORPORATION) and 2.6 parts of a 5% aqueous ascorbic acid solution were added, respectively. And reacted for 60 minutes. Then, the mixture was cooled to about 30° C., neutralized with 10% aqueous ammonia to a pH of about 7-9, and filtered through a 150-mesh nylon mesh to obtain an acrylic resin emulsion [2]. The nonvolatile content was 46.2% and the average particle size was 110 nm. The glass transition temperature was -20°C.

<Production Example 3: Preparation of emulsion [3] containing emulsion-polymerized resin particles (A) of acrylic monomer>
Ion-exchanged water (17.7 parts) was put into a SUS reaction can equipped with a cooling tube and a stirring blade, and the temperature was raised to 75°C.
Ion-exchanged water (26.8 parts), Newcol 707SF (0.4 parts), 2 ethylhexyl acrylate (80.4 parts), methyl methacrylate (17.6 parts), methacrylic acid (2.0 parts), n -Emulsified dodecyl mercaptan (0.2 parts) (i) and 10% NaPS (sodium persulfate) aqueous solution (35.1 parts) (ii) were prepared, and the reaction vessel was first charged with (ii). 50% was added, and after 10 minutes, 50% of (i) and (ii) was added dropwise over 5.5 hours to polymerize at 73 to 77°C.
After the completion of the dropping, the temperature was lowered to 70° C., and 10 minutes after the completion of the dropping, 10% aqueous ammonia was added to neutralize the pH to 7-9, and the temperature was maintained for 2 hours.
Then, the mixture was cooled to 55 to 60° C., and 2.3 parts of a 10 mass% aqueous solution of tertiary butyl hydroperoxide (NOF CORPORATION, “Perbutyl H-69”) and 4.7 parts of a 5% aqueous sodium hydrogen sulfite solution were added. Each was added and allowed to react for 30 minutes. Thereafter, 2.3 parts of a 10% aqueous solution of tertiary butyl hydroperoxide and 4.7 parts of a 5% aqueous sodium hydrogen sulfite solution were added, and the reaction was carried out for 30 minutes. Then, it cooled to about 30 degreeC and obtained the acrylic resin emulsion [3]. The nonvolatile content was 65.5% and the average particle size was 840 nm. The glass transition temperature was -50°C.

<Production Example 4: Preparation of emulsion [4] containing emulsion-polymerized resin particles (A) of acrylic monomer>
Ion-exchanged water (53.0 parts) and sodium citrate (0.2 parts) were charged into a SUS reaction can equipped with a cooling tube and a stirring blade to completely dissolve them, and the temperature was raised to 80°C.
Ion-exchanged water (51.3 parts), sodium lauryl sulfate (2.4 parts), n-butyl acrylate (57.0 parts), methyl methacrylate (37.0 parts), methacrylic acid (3.0 parts), An emulsified product of ethylene glycol dimethacrylate (3.0 parts) (i) and a 3% KPS (potassium persulfate) aqueous solution (10.3 parts) (ii) were prepared. Was added dropwise, and after 10 minutes, 55% of (i) and (ii) were added dropwise over 3.5 hours to polymerize at 78 to 82°C.
After completion of the dropping, the temperature was raised to 88 to 90° C., 10 minutes after the completion of the dropping, 4% of (ii) was added, the temperature was maintained for 35 minutes, and 4% of (ii) was further added, The temperature was held for 45 minutes.
Thereafter, the mixture was cooled to 55 to 60° C., and 1.7 parts of a 10% aqueous solution of tertiary butyl hydroperoxide (NOF CORPORATION, “Perbutyl H-69”) and 2.8 parts of a 5% aqueous sodium hydrogen sulfite solution, respectively. It was added and reacted for 60 minutes. Then, the mixture was cooled to about 30° C., neutralized with 10% aqueous ammonia to a pH of about 7 to 9, and filtered through a nylon mesh with 150 meshes to obtain an acrylic resin emulsion [4]. The nonvolatile content was 45.6% and the average particle size was 180 nm. The glass transition temperature was -7°C.

<Production Example 5: Preparation of emulsion [5] containing emulsion-polymerized resin particles (A) of acrylic monomer>
An acrylic resin emulsion [5] was obtained in the same manner as in Production Example 4 except that n-butyl acrylate (52.5 parts) and methyl methacrylate (41.5 parts) were used. The nonvolatile content was 45.4% and the average particle size was 280 nm. The glass transition temperature was 0°C.

(Example 1)
In a polyethylene cup (100 ml), 1.28 parts of acrylic resin emulsion [1] (nonvolatile content: 0.57 parts) and colloidal silica (Nissan Chemical Co., Ltd. "Snowtex 40" (nonvolatile content 40%) , Average particle diameter 10 nm)) 0.72 parts (nonvolatile content conversion amount: 0.29 parts) are added so that the total of the nonvolatile content and the inorganic particles (nonvolatile content) of the acrylic resin emulsion is about 4.5%. It was diluted with ion-exchanged water (18.0 parts) and stirred and mixed with a magnetic stirrer for 30 minutes to obtain a hair styling composition for evaluation. The obtained hair styling composition was in a uniform state.
Using this, flaking properties and hair styling properties were evaluated.

(Example 2)
A hair styling composition was prepared in the same manner as in Example 1 except that the acrylic resin emulsion [2] was used. The obtained hair styling composition was in a uniform state.

( Reference example 1 )
A hair styling composition was prepared in the same manner as in Example 2, except that colloidal silica (“Snowtex MP-1040” manufactured by Nissan Chemical Industries, Ltd. (nonvolatile content 40%, average particle size 120 nm) was used. The hairdressing composition was in a uniform state.

(Example 3 )
Acrylic resin emulsion [2] 0.92 parts (nonvolatile matter equivalent: 0.43 part) and colloidal silica "Snowtex MP-1040" 1.08 parts (nonvolatile matter equivalent: 0.43 part) were used. A hair styling composition was prepared in the same manner as in Example 1 except for the above. The obtained hair styling composition was in a uniform state.

(Example 4 )
Acrylic resin emulsion [2] 0.74 parts (nonvolatile matter equivalent: 0.34 part) and colloidal silica "Snowtex MP-1040" 1.26 parts (nonvolatile matter equivalent: 0.50 part) were used. A hair styling composition was prepared in the same manner as in Example 1 except for the above. The obtained hair styling composition was in a uniform state.

( Comparative Example 5 )
Acrylic resin emulsion [3] 1.62 parts (nonvolatile matter conversion amount; 1.06 parts) and colloidal silica "Snowtex 40" 0.38 parts (nonvolatile matter conversion amount; 0.15 parts) were used. A hair styling composition was prepared in the same manner as in Example 1. The obtained hair styling composition was in a uniform state.

( Comparative example 6 )
Acrylic resin emulsion [3] 1.18 parts (nonvolatile matter equivalent: 0.77 part) and colloidal silica "Snowtex MP-1040" 0.82 part (nonvolatile matter equivalent: 0.33 part) were used. A hair styling composition was prepared in the same manner as in Example 1 except for the above. The obtained hair styling composition was in a uniform state.

( Comparative Example 7 )
Acrylic resin emulsion [3] 0.92 parts (nonvolatile matter conversion amount; 0.60 part) and colloidal silica "Snowtex MP-1040" 1.08 parts (nonvolatile matter conversion amount; 0.43 parts) were used. A hair styling composition was prepared in the same manner as in Example 1 except for the above. The obtained hair styling composition was in a uniform state.

( Comparative Example 8 )
A hair styling composition was prepared in the same manner as in Comparative Example 7 except that colloidal silica (“Snowtex MP-2040” manufactured by Nissan Chemical Industries, Ltd. (nonvolatile content 40%, average particle diameter 200 nm)) was used as the silica (B). The obtained hairdressing composition was in a uniform state.

( Comparative Example 9 )
A hair styling composition was prepared in the same manner as in Comparative Example 5 except that acrylic resin emulsion [4] and colloidal silica "Snowtex MP-1040" were used. The obtained hair styling composition was in a uniform state.

( Comparative Example 10 )
A hair styling composition was prepared in the same manner as in Comparative Example 9 except that the acrylic resin emulsion [5] was used. The obtained hair styling composition was in a uniform state.

(Comparative Example 1)
In a polyethylene cup (100 ml), an acrylic resin emulsion [1] 1.62 parts (nonvolatile matter equivalent amount; 0.72 parts) and a large particle size silica aqueous dispersion (nonvolatile matter 5%, average particle diameter 3700 nm) 3 0.04 parts (non-volatile content equivalent: 0.15 parts) was added, and ion-exchanged water (15.4 parts) was added so that the total of the non-volatile content of the acrylic resin emulsion and the inorganic particles (non-volatile content) was about 4.5%. ) And stirred and mixed with a magnetic stirrer for 30 minutes to obtain a hairdressing composition for evaluation. The obtained hair styling composition was in a uniform state.

(Comparative example 2)
A hair styling composition was prepared in the same manner as in Comparative Example 1 except that a large particle size talc aqueous dispersion (nonvolatile matter 5%, average particle size 15000 nm) was used instead of the large particle size silica. The obtained hair styling composition was in a uniform state.

(Comparative example 3)
A hair styling composition was prepared in the same manner as in Comparative Example 1 except that the acrylic resin emulsion [2] was used. The obtained hair styling composition was in a uniform state.

(Comparative Example 4)
A hair styling composition was prepared in the same manner as in Comparative Example 3 except that a large particle size talc aqueous dispersion (nonvolatile matter 5%, average particle size 15000 nm) was used. The obtained hair styling composition was in a uniform state.

The hair styling compositions and flaking of the hair styling compositions of Examples 1 to 4, Reference Example 1 and Comparative Examples 1 to 10 were evaluated by the following evaluation methods. The results are shown in Table 1.

<Hairdressing performance>
Weigh 2.0 g of the hairdressing composition obtained above with a balance, spread it thinly over the entire palm, apply it evenly on one side of the head of the cut model wig, and tie it straight up. The hair styling performance was evaluated according to the following evaluation criteria based on whether or not the shape can be maintained after being slightly lifted.
〔Evaluation criteria〕
◯: The shape was maintained ×: The shape collapsed immediately and the hair hung down

<flaking>
After weighing 2.0 g of the hair styling composition obtained above with a balance and spreading it thinly over the entire palm, apply it so that one side of the head of the cut model wig is centered and stroked at room temperature ( It was allowed to stand for 12 hours or more at 23 to 28°C. After standing still, the applied hair was combed 5 times with a plastic comb. The state of the wig after combing was visually observed and evaluated according to the following evaluation criteria.
〔Evaluation criteria〕
The evaluation criteria are as follows.
6: No flaking occurred at all 5: Very small flaking occurred only in a very small amount 4: Very small flaking occurred a little but within the allowable range 3: Very small flaking was not acceptable Occurred about 2: Very small flaking occurred, a large amount of large flaking occurred 1: Large amount of flaking occurred so that the whole looks white

From the results in Table 1, the ratio L(A)/L(B) of the average particle diameter L(A) of the emulsion-polymerized resin particles (A) of the acrylic monomer and the average particle diameter L(B) of the silica (B) is Each of Examples 1 to 4, which is a hair styling composition containing the emulsion-polymerized resin particles (A) of an acrylic monomer of ½ to 100/1 and silica (B), is excellent in hair styling property and has a good flare. I found that there were few kings.
On the other hand, the ratio L(A)/L(B) of the average particle diameter L(A) of the emulsion-polymerized resin particles (A) of the acrylic monomer and the average particle diameter L(B) of the silica (B) is defined by the present invention. It was found that Comparative Examples 1 to 4 which did not satisfy the range had a large amount of flaking and were inferior to Example 1.

Further, the hair styling compositions of Examples 1 to 4, Reference Example 1 and Comparative Examples 5 to 10 were subjected to hair styling by applying the hair styling composition to a cut model wig in the evaluation of <Hair styling performance> described above. After 1 hour, the wig was touched by hand to check the presence or absence of stickiness. As a result, the wig was found to have any of the hair styling compositions of Examples 1 to 4, Reference Example 1 and Comparative Examples 5 to 10. There was almost no stickiness, and it had a smooth feel. That is, all the hair styling compositions of the examples had an excellent effect of suppressing stickiness.

The hair styling composition of the present invention is particularly suitable for an aqueous hair styling agent such as a hair spray, a hair mist, a hair setting lotion and a hair gel.

Claims (4)

Containing an emulsion containing acrylic resin particles (A) and an emulsifier and silica (B),
The average particle diameter L(A) of the acrylic resin particles (A) and the average particle diameter L(B) of the silica (B) are both 1000 nm or less,
The ratio L (A) / L (B ) is Ri 1 / 2-100 / 1 der,
Hairdressing compositions wherein the glass transition temperature of the acrylic resin particles (A) is characterized by -40 to-20 ° C. der Rukoto. Content of the said silica (B) is 10-250 mass parts with respect to 100 mass parts of said acrylic resin particles (A) , The hair styling composition of Claim 1 characterized by the above-mentioned. The hair styling composition according to claim 1 or 2 , wherein the silica (B) has an average particle diameter L(B) of 1 to 500 nm. The average particle diameter L (A) is styling composition according to any one of claims 1 to 3, characterized in that a 30~1000nm of the acrylic resin particles (A).