WO2012099110A1 - Hair cosmetic - Google Patents

Abstract

[Problem] To provide a hair cosmetic which exerts an excellent straightening effect immediately after applying to the hair and has a high stability and good performance (little stickiness, softness and smoothness in hair tips). [Solution] A hair cosmetic comprising: a block polymer (a) wherein two or more blocks comprising a monomer having a vinyl-type functional group are bonded via a linker monomer having a radical-polymerizable vinyl-type functional group and an oxazoline-type functional group (a non-radical-polymerizable functional group), among said two or more blocks, at least one block containing a monomer having a specific vinyl-type functional group; water and/or a lower alcoholic solvent (b); a thickener (c1); and silicone (d). A hair cosmetic comprising: the component (a); the component (b); the component (d); a propellant (c2); and a higher alcohol (e).

Description

Hair cosmetics

The present invention relates to hair cosmetics. More specifically, the present invention relates to a hair cosmetic that is excellent in a straight effect immediately after application to hair, and that is excellent in stability and usability.

Conventionally, for hair cosmetics (hair styling cosmetics) for forming a straight hairstyle, hair cosmetics in which acrylic or methacrylic resin compounds are dissolved in alcohol with the aim of improving setability. The fee was widely used (see, for example, Patent Document 1). However, resin-based cosmetics using resin-based compounds have problems in terms of usability, such as a hard and stiff feel, a harsh feel, and stickiness. Moreover, although the method of mix | blending silicone in large quantities was also used, there exists a problem that a usability | use_condition becomes heavy in this case.

In addition, although (a) component used by this invention is disclosed by patent document 2, in this patent document 2, (b) component, (c1) component, and (d) component are combined with (a) component. Or by combining the component (a) with the component (b), component (c2), component (d) and component (e), the straight effect, stability and usability can be improved. There is no description or suggestion about what can be done.

JP 2004-26825 A JP 2008-189907 A

The present invention has been made in view of the above-described conventional circumstances, and is excellent in the straight effect immediately after application to the hair, and is excellent in stability and usability (non-stickiness, flexibility, smoothness of hair ends). The purpose is to provide cosmetics.

In order to solve the above problems, one embodiment of the present invention is as follows: (a) two or more blocks composed of a monomer having a vinyl-based functional group are bonded via a linked monomer represented by the following formula (I); A block polymer comprising a monomer having a vinyl functional group represented by the following formula (II) in at least one of the two or more blocks;

[In the formula (I), R ₁ represents a hydrogen atom or a methyl group, and R ₂ to R ₅ each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. Or an alkyl group having 1 to 6 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and A is any 2 Represents a valent linking group or a direct bond. ]
CH ₂ = C (R ₁₆ ) —CO—O—X (II)
[In the formula (II), R ₁₆ represents a hydrogen atom or a methyl group, X represents a hydrogen atom, a linear, branched or cyclic alkyl group having 2 to 30 carbon atoms, or — (CH ₂ —CH (R ₆ ) —O) —R ₆ (wherein each R ₆ independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms). ]
(B) water and / or a lower alcohol solvent;
(C1) a thickener;
(D) To provide a hair cosmetic containing silicone.

In another aspect of the present invention, (a) two or more blocks composed of a monomer having a vinyl functional group are bonded via a linking monomer represented by the following formula (I), and the two or more blocks are combined. A block polymer comprising a monomer having a vinyl functional group represented by the following formula (II) in at least one block of:

[In the formula (I), R ₁ represents a hydrogen atom or a methyl group, and R ₂ to R ₅ each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. Or an alkyl group having 1 to 6 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and A is any 2 Represents a valent linking group or a direct bond. ]
CH ₂ = C (R ₁₆ ) —CO—O—X (II)
[In the formula (II), R ₁₆ represents a hydrogen atom or a methyl group, X represents a hydrogen atom, a linear, branched or cyclic alkyl group having 2 to 30 carbon atoms, or — (CH ₂ —CH (R ₆ ) —O) —R ₆ (wherein each R ₆ independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms). ]
(B) water and / or a lower alcohol solvent;
(C2) a propellant;
(D) silicone,
(E) To provide a hair cosmetic containing a higher alcohol.

According to the present invention, there is provided a hair cosmetic that is excellent in the straight effect immediately after application to the hair and that is excellent in stability and usability (non-stickiness, flexibility, smoothness of the hair ends).

Hereinafter, the present invention will be described in detail. In the following, “(meth) acrylic acid” represents acrylic acid and / or methacrylic acid, and “(meth) acrylate” represents acrylate and / or methacrylate.

<< The Invention of the First Aspect >>
The first aspect of the present invention includes the following components (a), (b), (c1), and (d).

[(A) component]
<Linked monomer>
The linking monomer used in the present invention is represented by the following formula (I) and does not react with a vinyl functional group that is a radical polymerizable functional group under normal radical polymerization conditions, but reacts under other conditions to form a covalent bond. And an oxazoline-based functional group that is a non-radically polymerizable functional group that can be formed.

In the formula (I), each substituent has the following meaning.

R ₁ represents a hydrogen atom or a methyl group. From the viewpoint of improving the reactivity of the oxazoline functional group, a hydrogen atom is preferable.

R ₂ to R ₅ are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 6 carbon atoms having an alkoxy group having 1 to 6 carbon atoms, or 1 carbon atom A substituted or unsubstituted phenyl group which may be substituted with an alkyl group of ˜6 or an alkoxy group of 1 to 6 carbon atoms; Preferred are a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and an alkyl group having 1 to 6 carbon atoms having an alkoxy group having 1 to 6 carbon atoms. From the viewpoint of improving the reactivity of the oxazoline functional group, a hydrogen atom or a methyl group is preferable, and a hydrogen atom is most preferable.

A represents an arbitrary divalent linking group or a direct bond (that is, A does not exist). Direct bonding is preferable from the viewpoint of improving the reactivity of the oxazoline functional group.

In the present invention, by using the linking monomer represented by the above formula (I), the radical polymerizable vinyl functional group forms a block by radical polymerization with a monomer having another vinyl functional group, On the other hand, the oxazoline-based functional group that is the non-radically polymerizable functional group reacts with a monomer that forms another block to form a covalent bond, and a block polymer that is the component (a) can be obtained very efficiently. it can.

Examples of the linking monomer represented by the above formula (I) include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-4-dimethyl-2-oxazoline, and 2-vinyl. -4-diethyl-2-oxazoline, 2-vinyl-4-methoxy-2-oxazoline, 2-vinyl-4-ethoxy-2-oxazoline, 2-vinyl-4-methoxymethyl-2-oxazoline, 2-vinyl- 4-phenyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-vinyl-5-ethyl-2-oxazoline, 2-vinyl-5-dimethyl-2-oxazoline, 2-vinyl-5 Methoxy-2-oxazoline, 2-vinyl-5-ethoxy-2-oxazoline, 2-vinyl-5-methoxymethyl-2-oxazoline, 2-vinyl 5-phenyl-2-oxazoline, 2-vinyl-4-methoxymethyl-5-phenyl-2-oxazoline, 2-isopropenyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2 -Isopropenyl-4-dimethyl-2-oxazoline, 2-isopropenyl-4-diethyl-2-oxazoline, 2-isopropenyl-4-methoxy-2-oxazoline, 2-isopropenyl-4-ethoxy-2-oxazoline 2-isopropenyl-4-methoxymethyl-2-oxazoline, 2-isopropenyl-4-phenyl-2-oxazoline, 2-isopropenyl-5-methyl-2-oxazoline, 2-isopropenyl-5-ethyl- 2-oxazoline, 2-isopropenyl-5-dimethyl-2-oxazoline, 2-iso Lopenyl-5-methoxy-2-oxazoline, 2-isopropenyl-5-ethoxy-2-oxazoline, 2-isopropenyl-5-methoxymethyl-2-oxazoline, 2-isopropenyl-5-phenyl-2-oxazoline, Specific examples include 2-isopropenyl-4-methoxymethyl-5-phenyl-2-oxazoline. However, it is not limited to these examples. Among these, 2-vinyl-2-oxazoline, 2-vinyl-4-dimethyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, because of high reactivity and easy availability of raw materials, 2-isopropenyl-2-oxazoline, 2-isopropenyl-4-dimethyl-2-oxazoline, 2-isopropenyl-5-methyl-2-oxazoline, 2-vinyl-4-methoxymethyl-5-phenyl-2- Oxazoline is preferred. More preferred are 2-vinyl-2-oxazoline, 2-vinyl-4-dimethyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, and most preferred is 2-vinyl-2-oxazoline.

In forming the block structure, the covalent bond formed using the oxazoline-based functional group is not particularly limited, but is preferably one that has reacted with a carboxylic acid group or one that has reacted with an epoxy group. . The structure after the reaction is as shown below.

(Wherein, B and D are part of a block polymer, _{respectively, R 1, R 2 ~ R} 5 have the same meanings as defined in formula (I).)

<Block polymer>
The block polymer which is the component (a) of the present invention is formed by bonding two or more blocks composed of monomers having a vinyl functional group via a linking monomer represented by the above formula (I).

In the present invention, a monomer having a vinyl functional group represented by the following formula (II) is included in at least one of the two or more blocks.

[Monomer represented by formula (II)]
CH ₂ = C (R ₁₆ ) —CO—O—X (II)
In the formula (II), each substituent has the following meaning.

R ₁₆ represents a hydrogen atom or a methyl group. A methyl group is preferred.

X is a hydrogen atom, a linear, branched or cyclic alkyl group having 2 to 30, preferably 2 to 18, more preferably 4 to 18 carbon atoms, or — (CH ₂ —CH (R ₆ ) —O) —R ₆ (where each R ₆ independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms).

Examples of the monomer represented by the formula (II) include ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, Alkoxyalkyl (meth) acrylates such as 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, etc. Can be mentioned. However, it is not limited to these examples. Of these, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate and the like are preferable.

In the present invention, the monomer having a vinyl functional group constituting the block is represented by the following formulas (III) to (VI) in addition to the monomer having a vinyl functional group represented by the formula (II). 1 type (s) or 2 or more types selected from monomers having a vinyl functional group.

[Monomer represented by formula (III)]
_{CH 2 = C (R 11)} -CO-NR 12 R 13 ··· (III)
In the above formula (III), each substituent has the following meaning.

R ₁₁ represents a hydrogen atom or a methyl group. In the present invention, a hydrogen atom is preferable.

R ₁₂ and R ₁₃ each independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms which may have a hydroxyl group. Examples of the alkyl group having 1 to 3 carbon atoms of R ₁₂ and R ₁₃ include a methyl group, an ethyl group, a propyl group, and an isopropyl group. Examples of the alkyl group having 1 to 3 carbon atoms having a hydroxyl group include a hydroxymethyl group and a 2-hydroxyethyl group. The sum of the carbon atoms of R ₁₂ and R ₁₃ is preferably 2 to 4, and most preferably 2.

Examples of the vinyl monomer represented by the above formula (III) include N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-propyl (meth) acrylamide, N-isopropyl (meth) acrylamide and the like. Alkyl acrylamides; dialkyl acrylamides such as N, N-dimethyl (meth) acrylamide and N, N-diethyl (meth) acrylamide; N-hydroxymethyl (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide , Hydroxyalkyl (meth) acrylamides such as N, N-bis (hydroxymethyl) (meth) acrylamide and N, N-bis (2-hydroxyethyl) (meth) acrylamide. Among them, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-propyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl ( Preferred are meth) acrylamide, N-hydroxymethyl (meth) acrylamide, and N- (2-hydroxyethyl) (meth) acrylamide.

[Monomer represented by formula (IV)]
CH ₂ = C (R ₁₄ ) —CO (O) — (CH ₂ ) a— (CHOH) b—O—R ₁₅ (IV)
In the above formula (IV), each substituent has the following meaning.

R ₁₄ represents a hydrogen atom or a methyl group. A methyl group is preferred.

R ₁₅ represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms. An ethyl group is preferred.

A represents an integer of 1 to 4. Preferably, it is an integer of 1 to 3.

B represents 0 or 1 (however, when b is 0, a represents an integer of 1, 3, 4).

Examples of the vinyl monomer represented by the above formula (IV) include hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 1,2-dihydroxypropyl (meth) ) Hydroxyalkyl (meth) acrylates such as acrylate, and alkoxyalkyl (meth) acrylates such as methoxymethyl (meth) acrylate and ethoxymethyl (meth) acrylate. Of these, 2-hydroxyethyl (meth) acrylate, 1,2-dihydroxypropyl (meth) acrylate, and the like are preferable.

[Monomer represented by formula (V)]
CH ₂ ═C (R ₂₅ ) —CO— (O) _c — (NH) _{1 —c} — (CH ₂ ) _d —N ⁺ R ₂₆ R ₂₇ R ₂₈ .X ⁻ (V)
In the above formula (V), each substituent has the following meaning.

R ₂₅ represents a hydrogen atom or a methyl group. A methyl group is preferred.

R ₂₆ and R ₂₇ each independently represents an alkyl group, aryl group or aralkyl group having 1 to 24 carbon atoms. A methyl group or an ethyl group is preferable.

R ₂₈ is a hydrogen atom, having 1 to 24 carbon atoms, an alkyl group, an aryl group, an aralkyl group, or _{-CH 2 -CH (OH) -CH 2} -N + R 29 R 30 R 31 · Z - represents a ( Here, R ₂₉ to R ₃₁ each independently represents an alkyl group, aryl group or aralkyl group having 1 to 24 carbon atoms, and Z ⁻ represents an anion). R ₂₈ is preferably a methyl group or an ethyl group, and more preferably a methyl group. R ₂₉ to R ₃₁ are each independently preferably a methyl group or an ethyl group, and more preferably a methyl group. X ^- and Z ^- as the anion represented by a halogen ion is preferable independently, a chlorine ion, an iodine ion or a bromine ion is more preferable.

C represents 0 or 1. 0 is preferred.

D represents an integer of 1 to 10. An integer of 1 to 5 is preferable, and 3 is more preferable.

Examples of the monomer represented by the above formula (V) include N- (meth) acryloyloxyethyl-N, N, N-trimethylammonium chloride, N- (meth) acryloyloxyethyl-N-ethyl-N, N— Dimethylammonium = monoethyl sulfate, N- (meth) acryloyloxyethyl-N, N, N-triethylammonium = monoethyl sulfate, N- [3- {N ′-(meth) acryloyloxyethyl-N ′, N ′ -Dimethylammonium} -2-hydroxypropyl] -N, N, N-trimethylammonium chloride, N- [3- {N ′-(meth) acryloyloxyethyl-N ′, N′-diethylammonium} -2-hydroxy Propyl] -N, N, N-triethylammonium chloride T) acrylic acid esters; N- (meth) acryloylaminopropyl-N, N, N-trimethylammonium chloride, N- (meth) acryloylaminopropyl-N-ethyl-N, N-dimethylammonium monoethyl sulfate, N- (meth) acryloylaminopropyl-N, N-diethyl-N-methylammonium chloride, N- (meth) acryloylaminopropyl-N, N-diethyl-N-methylammonium monomethyl sulfate, N- [3- {N '-(meth) acryloylaminopropyl-N', N'-dimethylammonium} -2-hydroxypropyl] -N, N, N-trimethylammonium chloride, N- [3- {N '-(meth) acryloyl Aminopropyl-N ′, N′-diethylammonium} -2-hydro Shipuropiru] -N, N, N- trimethyl ammonium chloride having a cationic group of the ride, etc. (meth) acrylamides, and the like. Among them, N- (meth) acryloyloxyethyl-N, N, N-trimethylammonium chloride and N- (meth) acryloylaminopropyl-N, N, N-trimethylammonium chloride are preferable, and N- (meth) is particularly preferable. Acryloylaminopropyl-N, N, N-trimethylammonium chloride is preferred. Most preferred is the combined use of N- (meth) acryloyloxyethyl-N, N, N-trimethylammonium chloride and N- (meth) acryloylaminopropyl-N, N, N-trimethylammonium chloride.

[Monomer represented by formula (VI)]
CH ₂ = C (R ₁₈ ) —CO—NH—R ₁₉ (VI)
In the above formula (VI), each substituent represents the following meaning.

R ₁₈ represents a hydrogen atom or a methyl group. A methyl group is preferred.

R ₁₉ represents a linear, branched or cyclic alkyl group having 6 to 30 carbon atoms, preferably 6 to 18 carbon atoms.

Examples of the monomer represented by the formula (VI) include hexyl (meth) acrylamide, octyl (meth) acrylamide, 2-ethylhexyl (meth) acrylamide, lauryl (meth) acrylamide, and stearyl (meth) acrylamide. . Of these, octyl (meth) acrylamide, lauryl (meth) acrylamide, and stearyl (meth) acrylamide are preferable.

In the present invention, in the component (a), it is preferable that the block bonded to one of the above linked monomers exhibits hydrophilicity and the block bonded to the other exhibits hydrophobicity. Accordingly, one block (for example, a hydrophobic block) is a soft segment and the other block (for example, a hydrophilic block) is a hard segment, which can be hard but excellent in elongation. Conventionally, a hard polymer is inferior in elongation, and it is necessary to soften the polymer in order to increase the elongation, and it has been difficult to obtain an elongation effect while maintaining the hardness.

The monomers represented by the above formulas (II) and (III) to (VI) can be used as hydrophilic vinyl monomers and hydrophobic vinyl monomers by appropriately selecting substituents in the formula. In a preferred embodiment in which one block exhibits hydrophilicity and the other block exhibits hydrophobicity, as long as each block exhibits hydrophilicity and hydrophobicity, each block has a hydrophilic vinylic monomer and a hydrophobic vinylic monomer. May be contained together.

It is preferable that the two or more blocks include at least a first block and a second block having different monomer compositions. When the block polymer of the present invention includes a first block and a second block having different monomer compositions, the radical polymerizable vinyl functional group of the linking monomer is bonded to the monomer of the first block, and the non-radical of the linking monomer When the polymerizable functional group is bonded to the monomer of the second block and the linking monomer is included in the first block, the amount of linking monomer relative to the total amount of monomers constituting the first block (“linking monomer in the first block” The ratio “) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, particularly 0.5% in order to efficiently and reliably connect the first block and the second block. The mass% or more is preferable. On the other hand, the amount of the linked monomer is preferably 20% by mass or less, more preferably 10% by mass or less, and still more preferably, from the viewpoint of easy control of molecular weight and difficulty in gelation during polymerization. Is preferably 5% by mass or less, particularly preferably 3% by mass or less.

The second block preferably contains a monomer having a carboxylic acid group and / or an epoxy group, and a vinyl functional group. By having a carboxylic acid group and / or an epoxy group in the second block, it is possible to form a covalent bond with an oxazoline functional group which is a non-radically polymerizable functional group, and by having a vinyl functional group It becomes possible to use for radical polymerization as a part of 2nd block.

Examples of the monomer having a carboxylic acid group and / or an epoxy group and a vinyl functional group include a monomer having a carboxylic acid group and a vinyl functional group, a monomer having an epoxy group and a vinyl functional group, a carboxylic acid group, an epoxy And monomers having a vinyl functional group. Each of these groups may have one or more. From the viewpoint of easy control of the molecular weight of the polymer, one vinyl functional group is preferable. In addition, one carboxylic acid group and one epoxy group are preferable.

Examples of the monomer having a carboxylic acid group and a vinyl functional group include unsaturated carboxylic acid monomers such as (meth) acrylic acid, maleic acid, itaconic acid, fumaric acid, and crotonic acid. Moreover, the monomer represented by following formula (VII) is also mentioned as a suitable example.

CH ₂ ═C (R ₂₀ ) —COO— (CH ₂ ) e—OCO—Y—COOH (VII)
In the above formula (VII), R ₂₀ represents a hydrogen atom or a methyl group. e represents an integer of 1 to 4, preferably an integer of 1 to 3. Most preferably, it is 2 from the viewpoint of easy reaction.

Y is a phenyl group which may have a substituent. As the substituent, a linear or branched alkyl group having 1 to 4 carbon atoms, more preferably 1 to 3 carbon atoms is preferable. From the viewpoint of easy reaction, Y is most preferably an unsubstituted phenyl group.

Examples of those represented by the above formula (VII) include (meth) acrylic acid ethyl terephthalate, (meth) acrylic acid propyl terephthalate, and the like.

As the monomer having a carboxylic acid group and a vinyl functional group, (meth) acrylic acid is preferred because of its high reactivity and easy availability of raw materials.

In addition, a part or all of the carboxylic acid such as (meth) acrylic acid as the monomer component may be used in the form of a salt. In the case of the salt form, hydrogen of the carboxylic acid is replaced with a part of the neutralizing agent, and examples thereof include a metal ion or an ammonium ion which may have a substituent. Examples of monovalent metal ions include alkali metal ions (sodium ion, potassium ion, lithium ion, etc.). The ammonium ion may have a substituent, but the substituent is preferably a linear or branched alkyl group having 1 to 30 carbon atoms which may have a hydroxyl group. As the ammonium ion, a quaternary ammonium ion is preferable. Examples of the neutralizing agent used for obtaining the salt include amines such as monoethanolamine, diethanolamine, triethanolamine, and aminomethylpropanol.

As the monomer having an epoxy group and a vinyl functional group, those represented by the following formula (VIII) are preferable.

In the formula, R ₂₁ represents a hydrogen atom or a methyl group. A methyl group is preferred.

R ₂₂ each independently represents a hydrogen atom or a methyl group. A hydrogen atom is preferred.

N represents an integer of 0 to 20, preferably 0.

Examples of the monomer having an epoxy group represented by the above formula (VIII) and a vinyl functional group include glycidyl (meth) acrylate, glycidyl (ethyleneoxy) ₂ (meth) acrylate, and glycidyl (propyleneoxy) ₂ (meth) acrylate. Glycidyl (ethyleneoxy) ₂ (propyleneoxy) ₂ (meth) acrylate, glycidyl (ethyleneoxy) ₅ (propyleneoxy) ₂ (meth) acrylate, and the like. Among these, glycidyl (meth) acrylate is preferable and glycidyl methacrylate is most preferable from the viewpoint of easy reaction, availability of raw materials, and the like.

The monomer having a carboxylic acid group and / or an epoxy group and a vinyl functional group constituting the second block is preferably a monomer having a carboxylic acid group and a vinyl functional group from the viewpoint that hydrophilicity can be imparted.

The monomer composition of the first block and the second block may be the same, but are preferably different compositions. More specific performance can be expressed by using blocks with different properties.

When one of the first block and the second block is hydrophilic and the other is hydrophobic, the first block is hydrophilic and the second block is hydrophobic for ease of manufacture. preferable.

The soft segment and the hard segment described above are indices determined by the softness of the polymer at room temperature, which is a normal use temperature, and are generally determined by the glass transition temperature (Tg). In the present invention, judging from the Tg of each block calculated from the Tg of the homopolymer of each monomer, those having a Tg of −20 ° C. or lower are defined as soft segments, and those having a higher Tg are defined as hard segments. If not, a block with a high value is a hard segment, and a block with a low value is a soft segment. When one of the physical properties of the first block and the second block is a soft segment and the other is a hard segment, the first block is a soft segment and the second block is a hard segment for ease of manufacturing. It is preferable to do.

In this case, the Tg of the first block is preferably −100 to −20 ° C., more preferably −50 to −20 ° C. The Tg of the second block is preferably −20 to 150 ° C., more preferably −10 to 50 ° C., and particularly preferably −5 to 30 ° C.

The water solubility and Tg of each block can be adjusted by appropriately selecting the type and amount of the vinyl monomer constituting each block. The following monomer composition is mentioned as a suitable structural example of a 1st block and a 2nd block. However, it is not limited to this.

<Preferred monomer composition example>
(I) First block connecting monomer 0.1 to 20% by mass
Hydrophilic vinyl monomer 0-79.9% by mass
Hydrophobic vinyl monomer 20-99.9% by mass
(II) Vinyl monomer containing second block carboxylic acid group and / or epoxy group 0.1-100% by mass
Hydrophilic vinyl monomer 0 to 99.9% by mass
(However, hydrophilic vinyl monomers that do not contain carboxylic acid groups and / or epoxy groups)
Hydrophobic vinyl monomer 0 to 90% by mass.

Here, the hydrophilic vinyl monomer is a monomer having a solubility in distilled water at 20 ° C. (g / 100 g water) of more than 1. The solubility is preferably 2 or more, more preferably 5 or more. The hydrophilic vinyl monomer is not particularly limited, and can be arbitrarily selected from, for example, an ionic monomer, a nonionic monomer, or a semipolar monomer.

On the other hand, a hydrophobic vinyl monomer is a monomer having a solubility in distilled water at 20 ° C. (g / 100 g-water) of 1 or less. The solubility is preferably 0.1 or less, more preferably 0.01 or less. The hydrophobic vinyl monomer is not particularly limited, but is preferably a nonionic monomer.

The amount of linked monomers in the total amount of monomers constituting the first block is preferably 0.1 to 20% by mass. As described above, when the proportion of the linking monomer in the first block is 0.1% by mass or more, the first block and the second block are easily and reliably connected. This ratio is more preferably 0.2% by mass or more, particularly 0.5% by mass or more. Further, when the proportion of the linked monomer in the first block is 20% by mass or less, the molecular weight is easily controlled, and gelation during polymerization tends to be difficult to handle. This ratio is more preferably 10% by mass or less, further preferably 5% by mass or less, and particularly preferably 3% by mass or less.

The amount of hydrophilic vinyl monomer in the total amount of monomers constituting the first block is preferably 0 to 79.9% by mass. This ratio is preferably 79.9% by mass or less because gas compatibility and flexibility are maintained. The amount of the hydrophilic vinyl monomer in the first block is more preferably 70% by mass or less, further preferably 60% by mass or less, and most preferably 50% by mass or less. Further, the hydrophilic vinyl monomer may not be contained at all, but the hydrophilic vinyl monomer is more preferably 10% by mass or more because it can maintain solubility in water or ethanol by having an appropriate hydrophilic property. More preferably, it is 20% by mass or more, and most preferably 30% by mass or more.

The amount of the hydrophobic vinyl monomer in the total amount of monomers constituting the first block is preferably 20 to 99.9% by mass. By setting this proportion to 20% by mass or more, gas compatibility, flexibility, lack of flaking and the like are improved. The amount of the hydrophobic vinyl monomer in the first block is more preferably 30% by mass or more, and further preferably 40% by mass or more. In addition, when the amount of the hydrophobic vinyl-based monomer is 99.9% by mass or less, the connection with the second block by the connection monomer is easily performed. The amount of the hydrophobic vinyl monomer in the first block is more preferably 90% by mass or less, further preferably 70% by mass or less, and most preferably 60% by mass or less.

The amount of vinyl monomer containing a carboxylic acid group and / or an epoxy group in the total amount of monomers constituting the second block is preferably 0.1 to 100% by mass. By setting this ratio to 0.1% by mass or more, the connection with the first block by the connecting monomer is easily performed. The amount of the vinyl monomer containing a carboxylic acid group and / or an epoxy group in the second block is more preferably 5% by mass or more, further preferably 10% by mass or more, and most preferably 20% by mass or more. is there. Further, the total monomer of the second block may be a vinyl monomer containing a carboxylic acid group and / or an epoxy group, but more preferably 90 mass from the viewpoint of affinity to hair and lack of flaking. % Or less, more preferably 80% by mass or less, particularly preferably 50% by mass or less, and most preferably 40% by mass or less.

The amount of hydrophilic vinyl monomer that does not contain a carboxylic acid group and / or an epoxy group in the total monomer amount constituting the second block is preferably 0 to 99.9% by mass. By setting this ratio to 99.9% by mass or less, the hydrophilic block monomer containing no carboxylic acid group and / or epoxy group reacts with the linking monomer, so that the first block is sufficiently linked. Cheap. The amount of the hydrophilic vinyl monomer that does not contain a carboxylic acid group and / or an epoxy group in the second block is more preferably 80% by mass or less, further preferably 50%, from the viewpoint of gas compatibility and flexibility. It is not more than mass%, most preferably not more than 30 mass%.

The amount of the hydrophobic vinyl monomer in the total amount of monomers constituting the second block is preferably 0 to 90% by mass. By making this ratio 90 mass% or less, there exists a tendency for moderate hydrophilicity to be provided and for affinity to hair to become high. The amount of the hydrophobic vinyl monomer in the second block is more preferably 80% by mass or less. The second block may not contain any hydrophobic vinyl monomer, but from the viewpoint of gas compatibility and flexibility, the amount of the hydrophobic vinyl monomer is more preferably 10% by mass or more, and still more preferably. Is 30% by mass or more, and most preferably 50% by mass or more.

The mass average molecular weight of each block constituting the component (a) of the present invention is preferably 1,000 to 500,000. By setting the mass average molecular weight of each block to 1,000 or more, the properties of each block are easily reflected in the entire block polymer, improving the setting power and flexibility, keeping the straight effect, not sticking, and tingling. The feeling of use such as absence is improved. More preferably, the mass average molecular weight is 3,000 or more, and particularly preferably 5,000 or more. By setting the mass average molecular weight to 500,000 or less, handling at the time of production becomes easy. More preferably, the mass average molecular weight is 100,000 or less, more preferably 50,000 or less, and most preferably 20,000 or less.

The mass average molecular weight of the block polymer as component (a) is preferably 3,000 to 1,000,000. By setting the mass average molecular weight to 3,000 or more, the setting force is increased. More preferably, it is 5,000 or more, More preferably, it is 10,000 or more. By making the mass average molecular weight 1,000,000 or less, the handleability during production becomes easy. More preferably, it is 500,000 or less, More preferably, it is 100,000 or less, Most preferably, it is 50,000 or less.

The mass ratio of the first block and the second block constituting the block polymer in the present invention is preferably in the range of 1/99 to 99/1. Thereby, the property of each block is easily reflected in the entire block polymer, and the setting power and flexibility are improved in the use as a hair setting agent composition. More preferably 1/50 to 50/1, still more preferably 1/9 to 9/1, particularly preferably 1/3 to 3/1, most preferably 1/2 to 2/1. is there.

The mass average molecular weight of the polymer can be measured by gel permeation chromatography (for example, tetrahydrofuran is used as a developing solvent).

The block polymer used in the present invention preferably has a viscosity capable of preparing a 30% by mass ethanol solution at 25 ° C., more preferably the viscosity of the 30% by mass ethanol solution at 25 ° C. is 10,000 mPa · s or less, More preferably, it is 5,000 mPa · s or less. However, this viscosity is usually 10 mPa · s or more.

The adjustment of the molecular weight and viscosity of the polymer can be performed, for example, by controlling the degree of polymerization of the polymer. The molecular weight and viscosity can also be controlled by increasing or decreasing the addition amount of a crosslinking agent such as a polyfunctional acrylate. However, if the crosslinking agent is added as much as possible, the molecular weight and the viscosity are rapidly increased. For industrial production, it is difficult to control the addition amount. For this reason, it is most preferable not to use a crosslinking agent.

The component (a) is a known block polymer and can be produced by a conventional method. For example, it can be produced by mixing monomers that give respective structural units or precursors thereof, and performing solution polymerization, suspension polymerization, emulsion polymerization, or the like. Moreover, about a raw material monomer, when superposing | polymerizing, a precursor can be used and can also be changed into a desired form by neutralization reaction, addition reaction, etc. after superposition | polymerization. These can be appropriately selected depending on the ease of synthesis.

The polymerization reaction is preferably performed in a hydrophilic solvent. Examples of hydrophilic solvents include ketone solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone, alcohol solvents such as methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, and sec-butanol, water, and the like Is mentioned. These may be used alone or in combination of two or more. Among these, it is preferable to use an alcohol solvent.

As polymerization initiators, 2,2′-azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (4-methoxy-2,4-dimethyl) Valeronitrile), dimethyl-2,2′-azobisisobutyrate, 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (1-cyclohexanecarbonitrile), 2,2 ′ -Azo compounds such as azobis (2-methyl-N- (2-hydroxyethyl) -propionamide), 2,2'-azobis (2-amidinopropane) dihydrochloride, benzoyl peroxide, dicumyl peroxide, di -Peroxides such as t-butyl peroxide and lauroyl peroxide, persulfates, or redox systems thereof can be used without particular limitation. These may be used alone or in combination of two or more. The polymerization initiator is preferably used in the range of 0.01 to 5% by mass relative to the total monomers.

The polymerization reaction can be performed, for example, in an inert gas atmosphere such as nitrogen or argon, preferably at 30 to 120 ° C., more preferably at 40 to 100 ° C., usually for 1 to 30 hours. After completion of the polymerization, the produced polymer may be isolated from the reaction solution by an appropriate means such as solvent distillation or addition of a poor solvent. This polymer can be used as it is or after further purification, for example, in the production of cosmetics. Purification can be performed by combining appropriate means such as reprecipitation, solvent washing, and membrane separation as required. However, it is not limited to these manufacturing methods.

Examples of commercially available products of component (a) include “Diahold A-403” (manufactured by Mitsubishi Chemical Corporation).

The blending amount of the component (a) in the hair cosmetic composition of the present invention is preferably 0.1 to 10% by mass, more preferably 0.3 to 8% by mass. If the amount is too small, the straight effect immediately after application, lightness and flexibility tend to be inferior. On the other hand, if the amount is too high, stickiness tends to appear, which is not preferable.

[Component (b)]
Component (b) is an aqueous solvent and is water and / or a lower alcohol solvent. As the lower alcohol solvent, a volatile lower alcohol having 1 to 6 carbon atoms is preferably used, and specific examples thereof include ethanol and isopropanol. However, it is not limited to these examples.

[(C1) component]
The thickener as component (c1) is a thickener generally used in cosmetics, water-soluble polymers such as polysaccharide polymers, semi-synthetic polymers, synthetic polymers, and inorganic water swellability. Examples include clay minerals. Of these, water-soluble polymers such as carboxyvinyl polymer and sodium polyacrylate are preferred from the viewpoints of usability and stability.

Examples of semi-synthetic polymers include starch polymers such as carboxymethyl starch and methylhydroxypropyl starch, methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, and sodium carboxymethylcellulose (CMC). And alginic acid polymers such as sodium alginate and propylene glycol alginate.

Examples of synthetic polymers include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer (Carbopol; manufactured by Goodrich), polyethylene glycol 20,000, 40,000, 60,000. Polyoxyethylene polymer such as polyoxyethylene polyoxypropylene copolymer copolymer polymer, acrylic polymer such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, polyethyleneimine, cationic polymer, etc. It is done.

Examples of polysaccharide polymers include gum arabic, glucan, succinoglycan, carrageenan, caraya gum, tragacanth gum, guar gum, locust bean gum, galactomannan gum, xanthan gum, starch, carob gum, quince seed (malmello), casein, dextrin , Gelatin, sodium pectate, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, crystalline cellulose, O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride, O chloride -[2-Hydroxy-3- (trimethylammonio) propyl] guagum, O- [2-hydroxy-3- (trimethyl chloride) chloride Nmonio) propyl] locust bean gum, include chloride Hidorokishipuropirutorimoniumu starch.

Examples of inorganic water-swellable clay minerals include bentonite, silicic acid A1Mg (beegum), laponite, hectorite, silicic anhydride, etc. The blending amount of the component (c1) in the hair cosmetic composition of the present invention is 0.00. 05 to 5% by mass is preferable, more preferably 0.1 to 3% by mass, and particularly preferably 0.2 to 1.5% by mass. If the amount is too small, the straight effect immediately after application tends to be inferior. On the other hand, if the amount is too high, stickiness and lightness tend to be inferior.

[Component (d)]
The silicone as component (d) is not particularly limited, but examples thereof include polydimethylsiloxane, polydimethylsiloxane alkylene oxide copolymer, amino-modified polydimethylsiloxane, polyether-modified polydimethylsiloxane, methylphenylpolysiloxane, and epoxy-modified. Examples include polydimethylsiloxane, fluorine-modified polydimethylsiloxane, alcohol-modified polydimethylsiloxane, alkyl-modified polydimethylsiloxane, alkoxy-modified polydimethylsiloxane, and cyclic silicone.

Examples of the polydimethylsiloxane include “KF96H-1 million” (manufactured by Shin-Etsu Chemical Co., Ltd.), “SH200”, “BY11-007”, “BY22-029” (all are Toray Dow Corning Silicone Co., Ltd.) And “TSF451” (manufactured by Toshiba Silicone Co., Ltd.) and “L-45” (manufactured by Nippon Unicar Co., Ltd.).

Examples of the polydimethylsiloxane alkylene oxide copolymer include those commercially available as “F-178-21” (manufactured by Nippon Unicar Co., Ltd.).

Examples of the amino-modified polydimethylsiloxane include those having an aminoalkyl group such as an aminoethyl group or an aminopropyl group, and may have a substituent such as an alkyl group or a hydroxyl group. The alkyl group for the substituent is preferably a linear or branched alkyl group having 1 to 12 carbon atoms.

These amino-modified polydimethylsiloxanes are obtained by copolymerizing dimethylsiloxane and the above siloxane having an aminoalkyl group, or by post-modifying polydimethylsiloxane with a compound having an aminoalkyl group as described above to form a polydimethylsiloxane skeleton. It is obtained by introducing an aminoalkyl group.

Commercially available products of amino-modified polydimethylsiloxane include, for example, “USAR SILICONE ALE56” (manufactured by Union Carbide), “ABIL9905” (The Goldschmidt AG), “KF857”, “KF867”, “KF865” ( All are manufactured by Shin-Etsu Chemical Co., Ltd.), “SM8702C” (manufactured by Toray Dow Corning Silicone Co., Ltd.), “FZ-3707” (manufactured by Nippon Unicar Co., Ltd.), and the like.

Examples of the polyether-modified polydimethylsiloxane include those having a monomer skeleton such as oxyethylene, oxypropylene, oxybutylene, oxypentamethylene, oxyhexamethylene, oxy (2,2-dimethyl) propylene, and polyoxy Those having an oxyalkylene group of a homopolymer skeleton such as ethylene, polyoxypropylene, polyoxybutylene, polyoxypentamethylene, polyoxyhexamethylene, or a copolymer skeleton such as a poly (oxyethyleneoxypropylene) copolymer Can be mentioned. These may have a substituent such as a hydroxyl group or an alkyl group. The alkyl group for the substituent is preferably a linear or branched alkyl group having 1 to 12 carbon atoms. Particularly preferred are those having an oxyalkylene group of the polymer skeleton.

Examples of a method for producing such a modified polydimethylsiloxane having an oxyalkylene group include a method of copolymerizing dimethylsiloxane and a siloxane having an oxyalkylene group, and polydimethylsiloxane by a compound having an oxyalkylene group. There is a method of post-modifying and introducing an oxyalkylene group into the polydimethylsiloxane skeleton.

Most preferably, the polyether-modified polydimethylsiloxane is obtained by copolymerizing dimethylsiloxane and siloxane having an oxyalkylene group in the polymer skeleton.

Commercially available products of polyether-modified polydimethylsiloxane include, for example, “KF945A”, “KF351A”, “KF354A” (manufactured by Shin-Etsu Chemical Co., Ltd.), “SH3771C”, “SH3749” (Toray Dow Corning Silicone ( Co., Ltd.), “L-7602C”, “L-720” (Nihon Unicar Co., Ltd.), “SF1066” (manufactured by General Electric Company), and the like.

Examples of methylphenylpolysiloxane include “KF56” (manufactured by Shin-Etsu Chemical Co., Ltd.), “SH556” (manufactured by Toray Dow Corning Silicone Co., Ltd.), “FZ-209” (manufactured by Nippon Unicar Co., Ltd.), etc. Is commercially available.

Examples of the epoxy-modified polydimethylsiloxane include “X-60-164” (manufactured by Shin-Etsu Chemical Co., Ltd.), “PS922” (manufactured by Chisso Corporation), and “L-9300” (manufactured by Nihon Unicar Corporation). Are commercially available.

As the fluorine-modified polydimethylsiloxane, “X-22-820” (manufactured by Shin-Etsu Chemical Co., Ltd.), “PS182” (manufactured by Chisso Corporation) and the like are commercially available.

Examples of the alcohol-modified polydimethylsiloxane include “KF851” (manufactured by Shin-Etsu Chemical Co., Ltd.), “FM4411” (manufactured by Chisso Corporation), “FZ-3722”, “F-235-21” (Nihon Unicar ( Etc.) are commercially available.

As the alkyl-modified polydimethylsiloxane, “KF410”, “KF-413” (manufactured by Shin-Etsu Chemical Co., Ltd.), “PS130”, “PS137” (manufactured by Chisso Corporation) and the like are commercially available.

As the above alkoxy-modified polydimethylsiloxane, “PS912” (manufactured by Chisso Corporation), “FZ-3701” (manufactured by Nihon Unicar Corporation), etc. are commercially available.

As the above cyclic silicone, “SH244”, “SH245”, “SH246” (manufactured by Toray Dow Corning Silicone Co., Ltd.) and the like are commercially available.

In the present invention, in particular, polymeric silicones, particularly polymeric silicones having an average degree of polymerization of about 1000 to 10,000 (for example, highly polymerized silicone rubber, etc.) are more preferably used.

Highly polymerized silicone rubber refers to a linear silicone polymer having an average degree of polymerization of dimethylpolysiloxane of 1000 to 10,000. There are various commercially available silicone rubbers. Preferred silicone rubbers include, for example, silicone G-20-IP-4S, silicone G-10-DMS, silicone G-20-DMS (manufactured by Shin-Etsu Chemical Co., Ltd.), Silicone G-40-DMS (EM80) (manufactured by Toray Dow Corning Silicone Co., Ltd.), silicone G-20-SIN (manufactured by Nisshin Oil Co., Ltd.), and the like can be mentioned.

In addition to the above, a highly polymerized dimethylsiloxane / methyl (aminopropyl) siloxane copolymer is also a preferred example. These may be amino-modified. Examples of commercially available products include APS-10-DMS, APS-10-D5, APS-20-DMS, APS-20-D5, APS-20-EM73S, APS (HiA) -20-DMS, and APS (HiA). -20-EM73S (Shin-Etsu Chemical Co., Ltd.).

In the present invention, the component (a) :( d) component (mass ratio) is preferably 1: 0.1 to 1:40, more preferably 1: 0.5 to 1:35. When the mass ratio of the component (d) to the component (a) is less than 0.1, it is difficult to obtain an effect of sufficient smoothness and non-stickiness of the hair ends. On the other hand, when the mass ratio of the component (d) to the component (a) exceeds 40, it is difficult to obtain sufficient straight keeping force and lightness.

The blending amount of the component (d) in the hair cosmetic composition of the present invention is preferably 0.1 to 30% by mass, more preferably 1 to 15% by mass, and particularly preferably 3 to 10% by mass. If the amount is too small, there is a tendency to be inferior to the straight effect immediately after application, non-stickiness, and smoothness of the hair tip, while if the amount is too high, it tends to be inferior in stability and non-stickiness. Absent.

The hair cosmetic composition according to the first aspect of the present invention containing the components (a), (b), (c1) and (d) has a system viscosity of 500 to 100,000 mPa · s (25 ° C., B-type viscometer). ), More preferably 1,000 to 50,000 mPa · s, and particularly preferably 2,000 to 10,000 mPa · s. By setting the viscosity within the above range, the straight effect immediately after application and the smoothness of the hair tip can be enhanced. The viscosity can be adjusted, for example, by controlling the polymerization degree of the copolymer to be blended, increasing / decreasing the addition amount of the polymer, adjusting the blending amount of the aqueous solvent, and the like.

The hair cosmetic composition of the first aspect of the present invention comprises a solubilizing system, an emulsifying system (oil-in-water emulsifying system, water-in-oil emulsifying system), powder dispersion system, oil-water two-layer system, oil-water-powder. Any of these three-layer systems may be used. Preferable use modes of the hair cosmetic composition of the present invention include hair styling gel, hair liquid, hair cream, hair milk, hair mist, hair wax and the like.

[Optional components]
Other additives that can be incorporated into the hair cosmetic composition of the first aspect of the present invention include anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, semipolar surfactants, higher alcohols. , Cationic polymers, anionic polymers, nonionic polymers, amphoteric polymers, oils, pearling agents, suspending agents and the like.

Examples of anionic surfactants include α-olefin sulfonates, higher alcohol sulfates, polyoxyethylene alkyl ether sulfates, paraffin sulfonates, polyoxyethylene alkyl ether carboxylic acid esters, and alkyl sulfosuccinates. Those commonly used in detergent compositions such as N-acyl-β-alanine salt, N-acyl glutamate, and acylmethyl taurate can be used. Examples of counter ions of these anionic surfactants include sodium, potassium, ammonium, triethanolamine, diethanolamine and the like.

As the cationic surfactant, for example, a long-chain alkyl group-containing quaternary ammonium salt is preferable. The long chain alkyl group is preferably one having 6 to 24 carbon atoms. Examples of the long-chain alkyl group-containing quaternary ammonium salt include long chains such as cetyltrimethylammonium salt, stearyltrimethylammonium salt, behenyltrimethylammonium salt, cetyldimethylbenzylammonium salt, stearyldimethylbenzylammonium salt, and behenyldimethylbenzylammonium salt. Two long chains such as one, dicetyldimethylammonium salt, distearyltrimethylammonium salt, dibehenyltrimethylammonium salt, dicetylmethylbenzylammonium salt, distearylmethylbenzylammonium salt, dibehenylmethylbenzylammonium salt And three long chains such as tricetylmethylammonium salt, tristearylmethylammonium salt, and tribehenylmethylammonium salt. And the like of it. Among them, one having one or two long chains is preferable, and one having one long chain is more preferable.

Examples of amphoteric surfactants include those containing a betaine group and a long-chain alkyl group such as aminoacetic acid betaine, imidazolium betaine, sulfobetaine and amidopropyl betaine.

Examples of nonionic surfactants include polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, fatty acid monoethanolamide, and fatty acid diethanolamide.

Examples of the semipolar surfactant include lauramine oxide (lauryl dimethylamine oxide). Such surfactants are generally commercially available and can be used as they are.

The higher alcohol is not particularly limited as long as it is a compound having a long-chain alkyl group and a hydroxyl group, but is preferably a linear or branched alkyl group having 6 to 24 carbon atoms in the alkyl group. The higher alcohol may have two or more hydroxyl groups, but preferably has only one hydroxyl group, and examples thereof include octyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol. Of these, cetyl alcohol, stearyl alcohol, and behenyl alcohol are preferable.

Examples of the cationic polymer include a cation-modified cellulose ether derivative, polydimethyldiallylammonium halide, and a copolymer of dimethyldiallylammonium halide and acrylamide. These may be used alone or in combination of two or more.

Examples of the anionic polymer include acrylic acid derivatives (polyacrylic acid and salts thereof, acrylic acid-acrylamide-ethyl acrylate copolymers and salts thereof), methacrylic acid derivatives, crotonic acid derivatives, and the like.

Nonionic polymers include, for example, acrylic acid derivatives (hydroxyethyl acrylate-methoxyethyl acrylate copolymer, polyacrylamide, etc.) and vinylpyrrolidone derivatives (polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymer, etc.). It is done.

Examples of amphoteric polymers include dimethyldiallylammonium chloride derivatives (acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer, acrylic acid-dimethyldiallylammonium chloride copolymer, etc.), and the like.

Examples of the oil component include olive oil, jojoba oil, liquid paraffin, and fatty acid alkyl ester oil.

Examples of the pearlizing agent include fatty acid ethylene glycol such as ethylene glycol distearate.

Examples of the suspending agent include polystyrene emulsions.

Other ingredients include natural extracts of animals and plants and derivatives thereof, organic acids such as citric acid and lactic acid, inorganic salts such as sodium chloride, solubilizers (ethanol, ethylene glycol, propylene glycol, etc.), moisturizers (glycerin, sorbitol, Maltitol, dipropylene glycol, 1,3-butylene glycol, hyaluronic acid, etc.), antioxidants, UV absorbers, bactericides, preservatives, chelating agents, fragrances, coloring agents, higher fatty acids, sequestering agents (edetic acid) Salt or the like), a pH adjuster, a foaming enhancer, and the like can be appropriately blended within a range not impairing the effects of the present invention.

In order to further improve the stability, an emulsifier such as a non-aqueous emulsifier (for example, polyoxyethylene hydrogenated castor oil, etc.) and a rim emulsifier (betaine emulsifier and higher fatty acid) may be blended.

<< The Invention of the Second Aspect >>
The present invention of the second aspect includes the components (a), (b), (c2), (d), and (e).

The component (a), the component (b), and the component (d) in the second aspect of the present invention are the components (a), (b), and (d) in the cosmetic of the present invention of the first aspect. Ingredients can be applied as is. Therefore, description thereof is omitted.

The components (c2) and (e) will be described below.

[(C2) component]
The propellant as the component (c2) is not particularly limited as long as it can be used for aerosol-type cosmetics. For example, liquefied petroleum gas (LPG) mainly composed of propane, butane and isobutane. , Dimethyl ether (DME) and compressed gas such as carbon dioxide and nitrogen gas, or a mixture thereof can be used. Of these, liquefied petroleum gas (LPG), dimethyl ether (DME) and the like are preferably used.

[(E) component]
The higher alcohol as the component (e) is not particularly limited as long as it is a compound having a long-chain alkyl group and a hydroxyl group, but the alkyl group has 6 to 24 carbon atoms and is a linear or branched alkyl group Is preferred. The higher alcohol may have two or more hydroxyl groups, but preferably has only one hydroxyl group, and examples thereof include octyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol. Of these, cetyl alcohol, stearyl alcohol, and behenyl alcohol are preferable. (E) 1 type (s) or 2 or more types can be used for a component.

In the present invention, the component (d) :( e) component (mass ratio) is preferably 1: 0.05 to 1: 1, more preferably 1: 0.1 to 1: 0.5. When the mass ratio of the (e) component to the (d) component is less than 0.05, it is difficult to obtain a sufficient smoothness and non-sticky effect of the hair tips. On the other hand, when the mass ratio of the component (e) to the component (d) exceeds 1, it is difficult to obtain sufficient stability and straight keeping force.

The amount of the component (e) in the hair cosmetic composition of the present invention is preferably 0.05 to 10% by mass, more preferably 0.1 to 5% by mass, and particularly preferably 0.3 to 3% by mass. If the amount is too small, the smoothness and flexibility of the hair ends tend to be inferior. On the other hand, if the amount is too high, the stability tends to be inferior, which is not preferable.

The hair cosmetic composition of the present invention of the second aspect comprises a stock solution containing (a) component, (d) component and (e) component in component (b), and a propellant which is component (c2). The dosage form of the stock solution is arbitrary, solubilization system, emulsion system (oil-in-water emulsion system, water-in-oil emulsion system), powder dispersion system, oil-water two-layer system, oil-water-powder three-layer system It doesn't matter either. In the present invention, these stock solutions may be any one as long as they can be pressurized and sealed together with a propellant to form an aerosol type. Various additives are added to form a hair foam (hair mousse for setting), non-gas aerosol (hair mist), hair spray, etc. It can be used as a hair cosmetic. The blending ratio of the stock solution and the propellant is preferably adjusted at a ratio of 30 to 98% by weight of the stock solution and 2 to 70% by weight of the propellant, more preferably 50 to 95% by weight of the stock solution with respect to the total amount of the hair cosmetic. The propellant is 5 to 50% by mass.

[Optional components]
As an additive that can be blended in the hair cosmetic composition of the second aspect, an anionic surfactant, a cationic surfactant, an amphoteric, as in the additive composition that can be blended in the cosmetic composition of the first aspect. Surfactant, nonionic surfactant, semipolar surfactant, water-soluble polymer, cationic polymer, anionic polymer, nonionic polymer, amphoteric polymer, oil, pearling agent, suspending agent, etc. Can be mentioned. Specific examples of these components are the same as those described in the section of the cosmetic of the present invention of the first aspect. Higher alcohols can also be blended.

As other components, as in the cosmetic composition of the first aspect of the present invention, natural extracts of animals and plants and derivatives thereof, organic acids, inorganic salts, solubilizers, moisturizers, antioxidants, UV absorption Agents, bactericides, preservatives, chelating agents, fragrances, colorants, higher fatty acids, sequestering agents, pH adjusters, foaming enhancers and the like. In order to further improve the stability, an emulsifier such as a non-aqueous emulsifier or a rim emulsifier may be blended.

Next, the present invention will be further described in detail with reference to examples, but the present invention is not limited thereto. Unless otherwise specified, the blending amount is expressed in mass% (actual amount).

1. Sample Preparation First, in the following examples and formulation examples shown below, the following block polymers were used as the component (a).
(Preparation of polymers 1 to 5)
A reactor equipped with a reflux condenser, a dropping funnel, a thermometer, a nitrogen gas inlet tube and a stirrer was charged with 200 parts by weight of ethanol and monomers of composition A shown in Table 1, and the inside of the reactor was purged with nitrogen. After adding 0.5 parts by weight of dimethyl-2,2′-azobisisobutyrate to this reactor, the reactor was heated from 35 ° C. to 80 ° C. over 1 hour and aged at 80 ° C. for 3 hours. Then, it was cooled to 40 ° C. Subsequently, monomers of composition B in Table 1 and 100 parts by weight of ethanol were charged into the reactor and stirred at 40 ° C. for 1 hour. Thereafter, the inside of the reactor was again purged with nitrogen, 0.5 parts by weight of dimethyl-2,2′-azobisisobutyrate was charged into the reactor, and then the reactor was heated from 40 ° C. to 80 ° C. over 1 hour. The mixture was aged at 80 ° C. for 5 hours and then cooled.

The viscosities of the polymers 1 to 5 thus obtained were measured in an ethanol solution having a polymer solid content of 30% by mass (B-type viscometer, rotor No. 2, 30 rpm, 25 ° C.). The measurement results are shown in Table 1.

Table 1 shows the Tg values of each block calculated from the Tg of the homopolymer of each constituent monomer. Tg was calculated according to a conventional method from Tg (catalog value) when each constituent monomer was a homopolymer and the mass ratio of each constituent monomer.

Furthermore, the evaluation results of hydrophobicity / hydrophilicity of each block are shown in Table 1. The evaluation of hydrophobicity / hydrophilicity was performed by synthesizing only each block (composition A, composition B) alone. Moreover, the block of MAA (methacrylic acid) which is an acidic substance was evaluated in a state neutralized with AMP (aminomethylpropanol).

In Table 1,
HEMA: hydroxyethyl methacrylate,
ETMA: ethoxyethyl methacrylate,
IBMA: isobutyl methacrylate,
LMA: lauryl methacrylate,
VOZO: 2-vinyloxazoline,
MAA: methacrylic acid,
SMA: stearyl methacrylate,
Respectively.

Next, the evaluation method used in this example will be described. In addition, about "viscosity", only the Example of this invention of the 1st aspect was evaluated.

[viscosity]
A sample (100 to 200 mL) was placed in a BL type viscometer (rotor No. 3, rotation speed 12 rpm, 25 ± 2 ° C.), and the viscosity of the sample after 1 minute from the start of rotor rotation was measured.

[Straight effect immediately after application]
The straight forming ability when applied to a permed hair strand was evaluated by a sensory test by a special panel (10 persons).
(Evaluation)
◎: 7 or more respondents said that it was excellent in straight effect immediately after application ○: 5-6 responded that it was excellent in straight effect immediately after application ○ △: 3-4 persons said that it was excellent in straight effect immediately after application Answer △: 1 to 2 responded that the straight effect immediately after application was excellent ×: 0 responded that the straight effect immediately after application was excellent

[No stickiness]
The non-stickiness when applied to a permed hair strand was evaluated by a sensory test by a professional panel (10 persons).
(Evaluation)
◎: More than 7 respondents have no stickiness ○: 5-6 respondents have no stickiness ○ △: 3-4 respondents have no stickiness △: 1-2 respondents have no stickiness And answer ×: 0 people answered that there was no stickiness

[Stability]
The temporal stability of the sample was evaluated according to the following evaluation criteria.
(Evaluation)
◎: As a result of appearance observation after leaving the sample at a temperature of 50 ° C. No abnormality was observed even after 4 weeks. ○: As a result of observation of the appearance after leaving the sample at a temperature of 50 ° C. No abnormality was observed. △: The sample was allowed to stand at an air temperature of 50 ° C. and the appearance was observed. As a result, separation was observed after one week. Δ: The sample was left to stand at room temperature (25 ° C.) for appearance observation As a result, separation was observed after 1 week. X: separation was observed immediately after sample preparation

[Lightness]
The lightness of the hair when applied to the permed hair strand was evaluated by a sensory test by a special panel (10 persons).
(Evaluation)
◎: 7 or more respondents said that the hair was light ○: 5-6 responded that the hair was light ○ △: 3-4 responded that the hair was light △: 1 to 2 responded that the hair was light And answer ×: 0 responded that the hair was light

[Smoothness of hair ends]
The smoothness of the hair tips when applied to permed hair strands was evaluated by a sensory test by a special panel (10 persons).
(Evaluation)
◎: 7 or more respondents said that the hair tips are smooth ○: 5 to 6 respondents said that the hair tips are smooth ○ △: 3 to 4 respondents said that the hair tips are smooth △: One or two people answered that the hair tips were smooth. X: 0 people answered that the hair tips were smooth.

[Flexibility]
The hardness at the time of bending the hair bundle after applying to the hair strand after perm and drying was evaluated by the sensory test by a special panel (10 persons).
(Evaluation)
◎: 7 or more respondents answered that they were not hard (soft) ○: 5-6 respondents answered that they were not hard (soft) ○ △: 3-4 respondents answered that they were not hard (soft) △: 1-2 Answer that name is not hard (soft) ×: 0 name is not hard (soft)

<< The Invention of the First Aspect >>
(Examples 1 to 7, Comparative Examples 1 to 5)
Using the samples shown in Table 2 below, the viscosity, the straight effect immediately after coating, the non-stickiness, the stability, the lightness, the smoothness of the hair tips, and the flexibility were evaluated according to the above evaluation methods. The results are shown in Table 2. In Table 2, the following components were used for the following components.
・ Highly polymerized dimethylsiloxane ・ Methyl (aminopropyl) siloxane polymer ^{(* 1)} : “APS-10-DMS” (manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Highly polymerized methylcyclopolysiloxane ^{(* 2)} : “Silicone G-20-DMS” (manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Silicone (20cs) ^{(* 3)} : “KF-96A” (manufactured by Shin-Etsu Chemical Co., Ltd.)

As is clear from the results in Table 2, the samples of Examples 1 to 7 were able to have the effects of the present invention. On the other hand, Comparative Examples 1 to 5 outside the scope of the present invention could not have all the effects of the present invention.

Referring to the first aspect of the present invention, further formulation examples will be shown below.

[Formulation Example 1 (hair milk)]
(Compounding ingredients) (mass%)
(1) Purified water Residual (2) Block polymer (“Diahold A-403”; Mitsubishi Chemical) 0.6
(3) Ethanol 5
(4) Carboxyvinyl polymer 0.2
(5) Hydroxyethyl cellulose 0.1
(6) Highly polymerized dimethylsiloxane / methyl (aminopyrrolyl) siloxane copolymer (“APS-10-DMS”; Shin-Etsu Chemical) 5
(7) Highly polymerized methylpolysiloxane 3
(“Silicone G-20-DMS”; Shin-Etsu Chemical)
(8) Silicone (20cs) ("KF-96A"; Shin-Etsu Chemical) 2
(9) Caustic soda 0.2
(10) Phenoxyethanol 0.5
(11) POE hydrogenated castor oil (EO60) 0.5
(12) Imidazolinium betaine 2
(13) Isostearic acid 0.5
(14) Hydroxyethylurea 0.1
(15) 1,3-butylene glycol 4
(16) EDTA2Na · 2H ₂ O 0.02
(17) Fragrance 0.2
(Manufacturing method)
Add (4) and (16) to (1) and stir and dissolve (main parts). Disperse (5), (10) and (14) in (3), add this to the main part, and stir and dissolve. (6) to (8), (11) to (13), (15) and (17) are mixed and emulsified in a part of (1), added to the main part, and stirred and mixed. (2) and the remaining (1) in which (9) is dissolved are added to the main part and dissolved by stirring to obtain hair milk.

[Prescription example 2 (hair milk)]
(Compounding ingredients) (mass%)
(1) Purified water Residue (2) Polymer 4 (Table 1) 5
(3) Ethanol 5
(4) Hydroxyethyl cellulose 1
(5) Highly polymerized methylpolysiloxane 5
(Silicone G-20-IP-4S; Shin-Etsu Chemical)
(6) Silicone (“KF-56”; Shin-Etsu Chemical) 10
(7) Aminomethylpropanol 0.1
(8) Methylparaben 0.2
(9) Wine extract 0.2
(10) Fragrance 0.2
(Manufacturing method)
Add (4), (8) to (10) to a part of (3), and stir and dissolve in (1) (main parts). Disperse (2) and the remaining (3), (5), (6) in a part of (1), add this to the main part, and stir and dissolve. (7) is added to the main part and dissolved by stirring to obtain hair milk.

[Prescription Example 3 (hair milk)]
(Compounding ingredients) (mass%)
(1) Purified water Residual (2) Polymer 5 (Table 1) 0.4
(3) Ethanol 3
(4) Carboxyvinyl polymer 0.3
(5) Highly polymerized dimethylsiloxane / methyl (aminopyrrolyl) siloxane copolymer (“APS (HiA) -20-EM73S”; Shin-Etsu Chemical) 1
(6) Highly polymerized methylpolysiloxane 1
(“Silicone G-20-DMS”; Shin-Etsu Chemical)
(7) Triethanolamine 0.2
(8) Phenoxyethanol 0.5
(9) Imidazolinium betaine 1
(10) Isostearic acid 0.1
(11) Hydroxyethylurea 0.1
(12) Propylene glycol 1
(13) EDTA2Na · 2H ₂ O 0.05
(14) Fragrance 0.2
(Manufacturing method)
(4) and (13) are added to (1) and dissolved by stirring (main parts). Disperse (8), (11), and (14) in a part of (3), add this to the main part, and stir and dissolve. The remaining (1) is mixed with (2), the remaining (3), (5), (6), (9), (10), (12) is emulsified and added to the main part. Stir and mix. (7) is added to the main part and dissolved by stirring to obtain hair milk.

<< The Invention of the Second Aspect >>
(Examples 8 to 14, Comparative Examples 6 to 9)
Using the samples shown in Table 3 below, according to the above evaluation methods, the straight effect immediately after application, non-stickiness, stability, lightness, smoothness of the hair tips, and flexibility were evaluated. The results are shown in Table 3. In Table 3, the following components were used for the following components.
・ Silicone (20cs) ^{(* 3)} : “KF-96A” (manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Highly polymerized dimethylsiloxane ・ Methyl (aminopropyl) siloxane polymer ^{(* 1)} : “APS-10-DMS” (manufactured by Shin-Etsu Chemical Co., Ltd.)

As is clear from the results in Table 3, the samples of Examples 8 to 13 (mousse) and Example 14 (spray) were able to have the effects of the present invention. On the other hand, Comparative Examples 6 to 9 outside the scope of the present invention could not have all the effects of the present invention.

Referring to the second aspect of the present invention, further formulation examples are shown below.

[Prescription Example 4 (Mousse)]
(Compounding ingredients) (mass%)
(1) Purified water Residual (2) LPG 8
(3) Block polymer ("Diahold A-403"; Mitsubishi Chemical) 1
(4) Ethanol 5
(5) Highly polymerized dimethylsiloxane / methyl (aminopyrrolyl) siloxane copolymer (“APS-10-DMS”; Shin-Etsu Chemical) 5
(6) Silicone (20cs) ("KF-96A"; Shin-Etsu Chemical) 2
(7) Triethanolamine 0.7
(8) Polyoxyethylene / polyoxypropylene decyl ether 1
("Emalex DAPE0212")
(9) Phenoxyethanol 0.5
(10) Stearyl alcohol 0.5
(11) Cetyl alcohol 0.5
(12) Hydroxyethylurea 0.1
(13) 1,3-butylene glycol 4
(14) EDTA2Na · 2H ₂ O 0.05
(15) Fragrance 0.2
(Manufacturing method)
(13), (14) and a part of the melted (8) are stirred and dissolved in a part (1) (main part). (9), (12), (15) are dissolved in (4) and added to the main part. The remaining (1), (5) to (7) are dispersed in (3) and added to the main part. Further, (10), (11) and the remaining (8) are dispersed and dissolved in the remaining (1) and added to the main part. The stock solution and (2) are filled and mixed in an aerosol can to obtain an aerosol mousse.

[Prescription Example 5 (Spray)]
(Compounding ingredients) (mass%)
(1) Purified water Residual (2) Dimethyl ether 50
(3) Polymer 4 (Table 1) 10
(4) Ethanol 10
(5) Highly polymerized dimethylsiloxane / methyl (aminopyrrolyl) siloxane copolymer (“APS (HiA) -20-EM73S”; Shin-Etsu Chemical) 5
(6) Silicone (20cs) ("KF-96A"; Shin-Etsu Chemical) 5
(7) Aminomethylpropanol 0.5
(8) Phenoxyethanol 0.5
(9) Behenyl alcohol 1
(10) Wine extract 0.1
(11) EDTA2Na · 2H ₂ O 0.02
(12) Fragrance 0.2
(Manufacturing method)
Add (11) to a part of (1) and stir and dissolve (main part). (4) to (8), (10), (12) are dispersed in (3) and added to the main part. (9) is dispersed and melted in the remaining (1) and added to the main part. The stock solution and (2) are filled and mixed in an aerosol can to obtain an aerosol spray.

[Prescription Example 6 (Mousse)]
(Compounding ingredients) (mass%)
(1) Purified water Residue (2) Dimethyl ether 5
(3) Polymer 5 (Table 1) 3
(4) Ethanol 2
(5) Highly polymerized methylpolysiloxane 3
("G-20-IP-4S"; Shin-Etsu Chemical)
(6) Aminomethylpropanol 0.5
(7) Polyoxyethylene / polyoxypropylene decyl ether 0.5
("Emalex DAPE0212")
(8) Polyoxyethylene hydrogenated castor oil (EO60) 0.5
(9) Methylparaben 0.2
(10) Stearyl alcohol 0.1
(11) Behenyl alcohol 0.3
(12) Hydroxyethylurea 0.1
(13) Propylene glycol 1
(14) 1,3-butylene glycol 2
(15) Fragrance 0.2
(Manufacturing method)
In part (1) (14), melted (7) is dissolved by stirring (main part). (8), (5) and (13) are dispersed in the remaining (1) and added to the main part. (10) and (11) are dispersed and dissolved in the remaining (1) and added to the main part. (3) Add a part of (4), the remaining (1), and (6) to the main part. The stock solution and (2) are filled and mixed in an aerosol can to obtain an aerosol mousse.

The hair cosmetic composition of the present invention is excellent in a straight effect immediately after application to hair, and is excellent in stability and usability (non-stickiness, flexibility, smoothness of hair ends).

Claims (7)

1. (A) Two or more blocks composed of a monomer having a vinyl functional group are bonded via a linked monomer represented by the following formula (I), and the following formula is contained in at least one of the two or more blocks: A block polymer comprising a monomer having a vinyl functional group represented by (II);
   

   

   [In the formula (I), R ₁ represents a hydrogen atom or a methyl group, and R ₂ to R ₅ each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. Or an alkyl group having 1 to 6 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and A is any 2 Represents a valent linking group or a direct bond. ]
   CH ₂ = C (R ₁₆ ) —CO—O—X (II)
   [In the formula (II), R ₁₆ represents a hydrogen atom or a methyl group, X represents a hydrogen atom, a linear, branched or cyclic alkyl group having 2 to 30 carbon atoms, or — (CH ₂ —CH (R ₆ ) —O) —R ₆ (wherein each R ₆ independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms). ]
   (B) water and / or a lower alcohol solvent;
   (C1) a thickener;
   (D) Hair cosmetics containing silicone.
2. (A) Two or more blocks composed of a monomer having a vinyl functional group are bonded via a linked monomer represented by the following formula (I), and the following formula is contained in at least one of the two or more blocks: A block polymer comprising a monomer having a vinyl functional group represented by (II);
   

   

   [In the formula (I), R ₁ represents a hydrogen atom or a methyl group, and R ₂ to R ₅ each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. Or an alkyl group having 1 to 6 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and A is any 2 Represents a valent linking group or a direct bond. ]
   CH ₂ = C (R ₁₆ ) —CO—O—X (II)
   [In the formula (II), R ₁₆ represents a hydrogen atom or a methyl group, X represents a hydrogen atom, a linear, branched or cyclic alkyl group having 2 to 30 carbon atoms, or — (CH ₂ —CH (R ₆ ) —O) —R ₆ (wherein each R ₆ independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms). ]
   (B) water and / or a lower alcohol solvent;
   (C2) a propellant;
   (D) silicone,
   (E) A hair cosmetic containing a higher alcohol.
3. In the component (a), as a monomer having a vinyl functional group constituting the block, in addition to the monomer having a vinyl functional group represented by the above formula (II), the following formulas (III) to (VI) The hair cosmetic according to claim 1 or 2, comprising one or more selected from monomers having a vinyl functional group.
   CH ₂ = C (R ₁₁ ) —CO—NR ₁₂ R ₁₃ (III)
   [In the formula (III), R ₁₁ represents a hydrogen atom or a methyl group, and R ₁₂ and R ₁₃ each independently represent a hydrogen atom or a straight chain of 1 to 3 carbon atoms optionally having a hydroxyl group or Represents a branched alkyl group. ]
   CH ₂ = C (R ₁₄ ) —CO (O) — (CH ₂ ) a— (CHOH) b—O—R ₁₅ (IV)
   [In the formula (IV), R ₁₄ represents a hydrogen atom or a methyl group, R ₁₅ represents a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms, and a represents an integer of 1 to 4. , B represents 0 or 1 (where a represents an integer of 1, 3, 4 when b = 0). ]
   CH ₂ ═C (R ₂₅ ) —CO— (O) _c — (NH) _{1 —c} — (CH ₂ ) _d —N ⁺ R ₂₆ R ₂₇ R ₂₈ .X ⁻ (V)
   Wherein (V), R ₂₅ represents a hydrogen atom or a methyl group, are each R _26, R ₂₇ independently represents a 1 to 24 carbon atoms, an alkyl group, an aryl group or an aralkyl group, R ₂₈ is hydrogen atom, having 1 to 24 carbon atoms, an alkyl group, an aryl group, an aralkyl group or _{-CH 2 -CH (OH) -CH 2} -N + R 29 R 30 R 31 · Z, - a represents (wherein, R ₂₉ to R ₃₁ each independently represents an alkyl group, aryl group or aralkyl group having 1 to 24 carbon atoms, Z ⁻ represents an anion), X ⁻ represents an anion, and c is 0 or 1 and d represents an integer of 1 to 10. ]
   CH ₂ = C (R ₁₈ ) —CO—NH—R ₁₉ (VI)
   [In the formula (VI), R ₁₈ represents a hydrogen atom or a methyl group, and R ₁₉ represents a linear, branched or cyclic alkyl group having 6 to 30 carbon atoms. ]
4. The hair cosmetic composition according to claim 1 or 2, wherein in the component (a), a block bonded to one of the linking monomers exhibits hydrophilicity, and a block bonded to the other exhibits hydrophobicity.
5. The hair cosmetic composition according to claim 1 or 2, wherein (a) component: (d) component = 1: 0.1 to 1:40 (mass ratio).
6. The hair cosmetic according to claim 1, wherein the viscosity of the system is 500 to 100,000 mPa · s (25 ° C, B-type viscometer).
7. The hair cosmetic composition according to claim 2, wherein (d) component: (e) component = 1: 0.05 to 1: 1 (mass ratio).