JP2002097117A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair cosmetic having excellent UV screening activity, achieving natural finish of the hair. SOLUTION: The hair cosmetic is obtained by compounding 0.01-20 wt.% of an amine oxide group-containing resin and 0.001-3 wt.% of a UV-absorbing agent based on the total components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic, and more particularly to a hair cosmetic capable of naturally finishing hair and maintaining the effect of preventing hair damage due to ultraviolet rays for a long period of time. It is.

[0002]

2. Description of the Related Art In order to prevent hair damage due to ultraviolet rays, a method using an ultraviolet absorber has been attempted for some time, but the effect of the method has been insufficient. In order to improve this, for example, Japanese Patent Application Laid-Open No. 7-196457 discloses that a combination of vinylpyrrolidone, dialkylaminoalkyl methacrylate and an ultraviolet absorber improves the durability of the protective effect and the natural finish of hair. Has been proposed.

On the other hand, the present inventors have disclosed Japanese Patent Application Laid-Open No. 10-723.
No. 23 proposes a water-soluble hair cosmetic composition which uses an amine oxide group-containing polymer, has good adaptability to hair, has excellent finish feeling, and has good washing and removing properties.

[0004]

SUMMARY OF THE INVENTION The present invention is a further improvement of the above-mentioned prior art, while maintaining the natural finish of hair.
An object of the present invention is to provide a hair cosmetic that can maintain a protective effect from ultraviolet rays.

[0005]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that good results can be obtained by using an amine oxide group-containing resin and an ultraviolet absorber together. The present invention has been reached. That is, the gist of the present invention is to provide a hair cosmetic comprising 0.01 to 20% by weight of an amine oxide group-containing resin with respect to all components and 0.001 to 3% by weight of an ultraviolet absorber. It exists in.

[0006] Another gist of the present invention also resides in the above hair cosmetic containing 0.01 to 1% by weight of an ultraviolet absorber. Further, another gist of the present invention is that the ultraviolet absorber is at least one selected from the group consisting of paraaminobenzoic acid, octyl paramethylaminobenzoate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate and urocanic acid. The above hair cosmetics are also present.

Another aspect of the present invention is that the amine oxide group-containing resin contains 15 to 100% by weight of a structural unit represented by any one of the following general formulas (1) to (5). It is also present in hair cosmetics.

[0008]

Embedded image

In the above formulas (1) to (5), R ¹ represents a hydrogen atom or a methyl group; R ² , R ³ and R ⁴ each independently represent an alkyl group, an aryl group or an aralkyl group;
Represents a divalent linking group, Y represents a methylene bond (—CH ₂ —),
Represents an imino bond (—NH—), an ether bond (—O—), or a thia bond (—S—), m is 0 or 1, n is 1 or 2, and p and q are each 0. And the other is 1.

[0010]

Embodiments of the present invention will be described below in detail. Amine oxide group-containing resin The amine oxide group-containing resin contained in the hair cosmetic of the present invention contains 15 to 100% by weight of a structural unit represented by any of the following general formulas (1) to (5). Those containing a structural unit represented by the general formula (1) are particularly preferable.

[0011]

Embedded image

In the above formulas (1) to (5), R ¹ represents a hydrogen atom or a methyl group; R ² , R ³ and R ⁴ each independently represent an alkyl group, an aryl group or an aralkyl group;
Represents a divalent linking group, Y represents a methylene bond (—CH ₂ —),
Represents an imino bond (—NH—), an ether bond (—O—), or a thia bond (—S—), m is 0 or 1, n is 1 or 2, and p and q are each 0. And the other is 1.

The alkyl group in R ² , R ³ and R ⁴ has 1 to 24 carbon atoms, the aryl group has 6 to 24 carbon atoms, and the aralkyl group has Those having 7 to 24 carbon atoms can be exemplified. These may further have a substituent.
Examples of the divalent bonding group represented by X include an alkylene bond, an ester bond (—CO—O—), a phenylene bond, and a carbonyl bond.

Further, the nitrogen-containing heterocycle and Y represented by the formulas (2) to (5) (in the case of a methylene bond or an imino bond) each have a substituent such as an alkyl group, an aryl group or an aralkyl group. You may have. In the present invention, the amine oxide group-containing resin containing the above-mentioned constitutional unit can be obtained by, for example, oxidizing a nitrogen atom-containing unsaturated monomer corresponding to a precursor, which can give such a constitutional unit by oxidization. After that, it can be obtained by a method of polymerizing, or a method of polymerizing a monomer corresponding to such a precursor and then oxidizing it. Among them, a method of polymerizing a nitrogen atom-containing unsaturated monomer corresponding to the latter precursor and then oxidizing the same is preferable.

Examples of the nitrogen-containing unsaturated monomer which can give an amine oxide group by the above-mentioned oxidization and correspond to the precursor include the following. i) Examples of monomers capable of forming the structural unit of the formula (1): N, N-dimethylaminoethyl (meth) acrylate;
N, N-diethylaminoethyl (meth) acrylate,
N, N-dimethylaminopropyl (meth) acrylate, N, N-diethylaminopropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylamide, N, N-diethylaminoethyl (meth) acramide N, N-dimethyl Aminopropyl (meth) acrylamide, N, N-diethylaminopropyl (meth)
Acrylamide, vinyl N, N-dimethylaminopropionate, vinyl N, N-diethylaminopropionate,
N, N-dimethylacrylamide, N, N-dimethylallylamine, p-dimethylaminomethylstyrene, p-
Dimethylaminoethylstyrene, p-diethylaminomethylstyrene, p-diethylaminoethylstyrene,
N, N-dimethylvinylamine, N, N-diethylvinylamine, N, N-diphenylvinylamine or an acid anhydride containing an unsaturated group such as maleic anhydride, itaconic anhydride, citraconic anhydride and N, N- Reaction product with dimethyl-1,3-propanediamine, etc., glycidyl (meth)
Epoxy group-containing unsaturated compounds such as acrylates and N, N
Reaction products with dimethyl-1,3-propanediamine and the like.

However, in this specification, the notation “(meth) acryl” refers to both “acryl” and “methacryl”, and the notation “(meth) acrylate” refers to both “acrylate” and “methacrylate”. Shall be shown. ii) Examples of monomers capable of forming the structural unit of the formula (2) 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine, 2-methyl-4-vinylpyridine, 3-methyl-4-vinylpyridine, 2-methyl-5-vinylpyridine, 3-methyl-5-vinylpyridine, 4-methyl-
5-vinylpyridine, 6-methyl-5-vinylpyridine, 2-lauryl-4-vinylpyridine, 2-lauryl-5-vinylpyridine, 2-t-butyl-4-vinylpyridine, 2-t-butyl-5 -Vinylpyridine and the like. iii) Examples of monomers capable of forming the structural unit of the formula (3) 1-vinylimidazole, 2-methyl-1-vinylimidazole, 4-methyl-1-vinylimidazole, 5-
Methyl-1-vinylimidazole, 2-lauryl-1-
Vinylimidazole, 4-t-butyl-1-vinylimidazole and the like. iv) Examples of monomers capable of forming the structural unit of the formula (4): 1-vinylpyrrolidine, 1-vinylimidazolidin,
-Vinyloxazolidine, 1-vinylpiperidine, 4-
Methyl-1-vinylpiperidine, 2-lauryl-1-vinylpiperidine, 2-methylpiperidinoethyl (meth)
Acrylate, 4-vinylmorpholine, 2-methyl-4
-Vinyl morpholine, 4-allyl morpholine, 4-vinyl thiamorpholine and the like. v) Examples of monomers capable of forming the structural unit of the formula (5): diallylamine, diallylmethylamine, diallylethylamine and the like.

The amine oxide group-containing resin used in the present invention may be one or more copolymers of the above-mentioned various types of nitrogen atom-containing monomers or other types of copolymerizable monomers. Is obtained by oxidizing a copolymer with a monomer, or by oxidizing the above-mentioned various monomers containing nitrogen atoms in advance and forming one or more copolymers thereof, or It is a copolymer with another type of polymerizable monomer.

When the amine oxide group-containing resin is a copolymer with another type of copolymerizable monomer, the content of the nitrogen atom-containing monomer in the total polymer is 15% by weight. %, More preferably 15 to 90%.
%, More preferably 30 to 80% by weight. If the amount is less than 15% by weight, the affinity between the resin and the hair and the flexibility may be insufficient, the finish of the hair may be deteriorated, and the effect of the ultraviolet absorber added at the same time may be insufficiently maintained. Cheap.

Specific examples of other types of monomers copolymerizable with the above-mentioned various types of monomers containing a nitrogen atom include (meth) acrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid. Saturated carboxylic acids, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) Alkyl (meth) acrylates such as acrylate, fluoroalkyl (meth) acrylates, (meth) acrylonitriles, (meth) acrylamides,
Hydroxy group-containing (meth) acrylates such as hydroxyethyl (meth) acrylate, polyethylene glycol (meth) acrylate, and polyethylene glycol di (meth) acrylate; epoxy group-containing (meth) acrylates such as glycidyl (meth) acrylate; styrene; −
Styrenes such as methylstyrene and p-chlorostyrene,
Maleimides such as N-cyclohexylmaleimide and N-phenylmaleimide; macromonomers such as pyrrolidones containing unsaturated groups such as N-vinylpyrrolidone; silicone macromonomers containing radically polymerizable unsaturated groups; And cation-modified amphoteric products and amphoteric-modified products. Among them, the alkyl group has 1 to 2 carbon atoms.
4 alkyl (meth) acrylates are preferred.

The polymerization or copolymerization of these monomers can be carried out by a radical polymerization method as described in the above-mentioned JP-A-10-72323, for example, by azo such as 2,2'-azobisisobutyronitrile. In the presence of a compound or a radical polymerization initiator such as a peroxide such as benzoyl peroxide, usually in an inert gas atmosphere such as nitrogen or argon, 30 to 120
It can be carried out by solution polymerization, bulk polymerization or suspension polymerization at a temperature of about 1C for about 1 to 20 hours.

Oxidation of the above-mentioned polymer or copolymer containing a nitrogen atom-containing monomer or a structural unit derived therefrom can also be carried out by the method described in the above-mentioned publications. Using a peroxide such as ammonium oxide, sodium peroxide, peracetic acid, metachloroperbenzoic acid, benzoyl peroxide, t-butyl hydroperoxide or an oxidizing agent such as ozone, at a temperature of about 20 to 100 ° C., 0 It can be performed in a processing time of about 1 to 100 hours.

Examples of the amine oxide group-containing resin used in the present invention include polymers or copolymers obtained by oxidizing a nitrogen atom-containing unsaturated monomer corresponding to a precursor and polymerizing the same as described above. In addition to a polymer or copolymer obtained by polymerizing a monomer corresponding to a suitable precursor and then oxidizing the same, for example, an epoxy group-containing unsaturated compound such as glycidyl (meth) acrylate or 2-isocyanatoethyl Use is also made of a polymer obtained by polymerization using a reaction product of an isocyanate group-containing unsaturated compound such as (meth) acrylate and an amine oxide group-containing compound such as hydroxyethyl-N, N'-dimethylamine oxide. Can be.

The weight average molecular weight of the amine oxide group-containing resin used in the present invention is preferably in the range of 5,000 to 1,000,000, and particularly preferably in the range of 20,000 to 300,000. When the weight average molecular weight is less than 5000, when used as a hair cosmetic, the setting power is insufficient, stickiness may occur, and the durability of the antioxidant effect may be insufficient. On the other hand, when it exceeds 1,000,000, it is difficult to manufacture, and when applied to hair, it may give a rough feeling, which is not preferable.

The hair cosmetic of the present invention must contain such an amine oxide group-containing resin in an amount of 0.01 to 20% by weight in all the components. A more preferred range is from 0.1 to
10% by weight. When the content is less than 0.01% by weight, the adhesion and setting power of the hair cosmetic to the hair are inferior. On the other hand, when the content exceeds 20% by weight, the removability at the time of shampooing deteriorates and the hair is rough. May give a feeling
Neither is preferred.

Ultraviolet absorber The following are examples of the ultraviolet absorber that can be used in the present invention. (1) 2-hydroxy-4-methoxybenzophenone,
2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenonesulfonate, 2,4-dihydroxybenzophenone, tetrahydroxybenzophenone And other benzophenone derivatives. (2) Para-aminobenzoic acid such as para-aminobenzoic acid, ethyl para-aminobenzoate, glyceryl para-aminobenzoate, amyl para-dimethyl amino benzoate, octyl para-dimethyl amino benzoate and esters thereof. (3) Ethyl paramethoxycinnamate, isopropyl paramethoxycinnamate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, sodium paramethoxycinnamate, potassium paramethoxycinnamate, glyceryl mono-2-ethylhexanoate and the like. Paramethoxycinnamic acid derivative. (4) Salicylates such as octyl salicylate, phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, and methyl salicylate. (5) urocanic acid, ethyl urocanate, methyl anthranilate, 4-tert-butyl-4'-methoxydibenzoylmethane, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole and the like.

All of these ultraviolet absorbers are commercially available. Among the above ultraviolet absorbers, preferred are paraaminobenzoic acid, octyl paramethylaminobenzoate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate and urocanic acid. One or more of these ultraviolet absorbers may be used, and the amount of the ultraviolet absorber must be 0.001 to 3% by weight based on the total amount of the hair cosmetic. A more preferred amount is also from 0.01 to 1% by weight.

When the amount is less than 0.001% by weight, the effect of preventing hair damage by ultraviolet rays is insufficient and the effect is not maintained. On the other hand, if this amount exceeds 3% by weight, the effect corresponding to the increase in the added amount cannot be obtained, and it is not economical. Hair Cosmetic The hair cosmetic of the present invention essentially contains the above-mentioned amine oxide group-containing resin in an amount of 0.01 to 20% by weight and an ultraviolet absorber in an amount of 0.001 to 3% by weight based on all components. . In the present invention, in addition to the essential components, other additives can be blended without any particular limitation as long as the effects of the present invention are not impaired, depending on the purpose and application.

The hair cosmetic composition of the present invention can be produced by stirring, mixing, dispersing or dissolving these compositions in a conventional manner, in the form of emulsion, mousse, gel, spray, shampoo. , Conditioner and the like. Examples of the above additives include surfactants, oils, alcohols, neutralizing agents, pH adjusters, propellants, fragrances, pigments, and the like.

The surfactant includes an anionic surfactant, an amphoteric surfactant, a cationic surfactant, a nonionic surfactant and the like, and specific examples thereof are as follows. (Anionic surfactant) triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium lauryl sulfate, sodium N-stearoyl-L-glutamate,
N-myristoyl-L-sodium glutamate, N-
Sodium lauroyl-L-glutamate, sodium lauroyl sarcosine, sodium lauroyl methyl taurine, triethanolamine polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene alkyl phenyl ether phosphate, sodium polyoxyethylene cetyl ether phosphorus Acid, sodium polyoxyethylene cetyl ether phosphate, polyoxyethylene lauryl ether phosphoric acid, sodium polyoxyethylene lauryl ether phosphate and the like. (Amphoteric surfactant) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine,
Lauryl dimethylaminoacetic acid betaine, N, N-dimethyl-N-alkyl-N-carboxymethylammonium betaine, N, N-dialkylaminoalkyleneammonium betaine, N, N, N-trialkyl-N-sulfoalkyleneammonium betaine, N , N-dialkyl-N, N-bis (polyoxyethylene sulfate) ammonium betaine and the like. (Cationic surfactant) Cetyltrimethylammonium chloride, distearyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, benzalkonium chloride, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium bromide and the like. (Nonionic surfactant) polyoxyethylene octylphenyl ether, polyoxyethylene glycol monooleate, diethanolamide stearate, polyoxyethylene hydrogenated castor oil, sorbitan monolaurate,
Polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbit hexastearate, sucrose fatty acid ester, lipophilic glyceryl monooleate, polyoxyethylene glycerin monostearate fatty acid diethanolamide, polyoxyethylene cetyl ether, monolauric acid Polyethylene glycol, sorbitan monooleate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbite tetraoleate, polyoxyethylene glycerin monostearate, and the like.

The content of these surfactants in hair cosmetics is usually about 0.5 to 30% by weight for both anionic surfactants and amphoteric surfactants, and cationic surfactants and nonionic surfactants. The activator is usually about 0.01 to 5% by weight. Oil agents include dimethylpolysiloxane, silicon derivatives such as methylphenylsiloxane, castor oil, coconut oil, liquid lanolin, beeswax, squalane, liquid paraffin, oleyl alcohol, lauryl alcohol, cetanol, stearyl alcohol, isopropyl myristate, cetyl lactate, Examples include diisopropyl adipate, hexadecyl dimethyloctanoate, decyl oleate, hexyl laurate, butyl stearate, and isopropyl palmitate. The content of these oils in hair cosmetics is usually 0.1.
It is about 01 to 45% by weight.

As the alcohols, glycerin, 1,1,
Polyhydric alcohols such as 3-butylene glycol, propylene glycol, polyethylene glycol, mannitol, sorbitol and dipropylene glycol, and monohydric alcohols such as ethanol and isopropanol can be used. As the neutralizing agent or the pH adjusting agent, acids such as phosphoric acid, succinic acid, citric acid, diisopropanolamine, triethanolamine, ammonia, potassium hydroxide and sodium hydroxide, and alkalis are used.

As the propellant, liquefied petroleum gas, dimethyl ether or the like can be used. Other additives may be arbitrarily selected and used as hair cosmetics as long as the purpose and use are not impaired.

[0033]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist. The amine oxide group-containing resins used in Examples and Comparative Examples are as follows. Amine oxide group-containing resin N, N'-dimethylaminoethyl methacrylate 50% by weight, methyl acrylate 30% by weight and lauryl methacrylate 20% by weight are converted into dimethylaminoamino groups in a copolymer using hydrogen peroxide. A resin having a weight average molecular weight of 110,000.
(Containing a structural unit corresponding to the general formula (1))
This resin is referred to as "P-1". Evaluation Method of Hair Cosmetic (1) Finish Feeling About 3 g of a sample was applied to the hair of a panel composed of 10 persons, and the dry feeling and slipperiness were organoleptically evaluated according to the following criteria. The results are shown in the table.

◎: Everyone evaluated that there was no feeling of stiffness and good sliding feeling. ：: 8 to 9 out of 10 persons evaluated that there was no rough feeling and the sliding feeling was good. Δ: 4 to 7 out of 10 persons evaluated that there was no stiff feeling and the sliding feeling was good. C: No more than 3 persons evaluated that there was no squealing feeling and good sliding feeling. (2) Persistence of Hair Damage Prevention Effect by Ultraviolet Light (Persistence of UV Damage Prevention Effect) Hair of about 10 cm in length was immersed in the hair cosmetics of Examples and Comparative Examples for 5 minutes, and then at 40 ° C. for 1 hour. Dry, then ultraviolet light with a wavelength of 300 nm (E = 500 cal / cm ² )
Was irradiated. One hour and eight hours after the start of irradiation, two hairs were collected, and the hairs were crossed in the middle of the hair and a 100 g load was applied to both ends of the hair using a tensile tester to bend the hair.

The surface condition of the bent portion was observed using an electron microscope, and the degree of damage caused by ultraviolet rays was evaluated according to the following criteria. The results are shown in the table. ◎: No damage was observed after 1 hour and after 8 hours. ○: Slight damage is seen after 8 hours as compared to after 1 hour. Δ: Damage is clearly seen after 8 hours as compared to after 1 hour. X: Significant damage is observed after 8 hours as compared to after 1 hour.

Hair Cosmetics <Examples 1 to 5, Comparative Examples 1 and 2> Hair cosmetics (liquid hair styling) were prepared according to the formulations shown in Tables 1 and 2, and evaluated by the above method. The results are shown in the table.

[0037]

[Table 1]

[0038]

[Table 2]

<Examples 6 to 12> Hair cosmetics were prepared in various formulations and evaluated. Formulations and results are shown individually. (Example 6) A mousse having the following composition exhibited a good finished feeling and a long lasting effect of preventing damage by ultraviolet rays.

[0040]

Table 3 P-1 5.0% by weight Sodium peroxyethylene lauryl ether sulfate (15EO) 0.5 Liquid isoparaffin 1.0 Oxybenzone (2-human peroxy-4-methoxybenzophenone) 0.01 Liquefied petroleum gas 9.0 Dimethyl ether 1.0 Perfume 0.2 Ethanol 15.0 Water Remainder Total 100 (Example 7) A shampoo having the following composition showed a good finish feeling and a long lasting effect of preventing damage by ultraviolet rays.

[0041]

Table 1 P-1 5.0% by weight sodium lauryl sulfate 10.0 sodium polyoxyethylene oleyl ether phosphate (5EO) 5.0 methyl parahydroxybenzoate 0.3 amino-modified silicon 2.0 methyl anthranilate 0. 1 Perfume 0.2 Water Remainder Total 100 (Example 8) A hair treatment (conditioner) having the following composition showed a good feeling of finish and sustainability of the effect of preventing damage by ultraviolet rays.

[0042]

Table 5 P-1 3.0% by weight Cetyltrimethylammonium chloride 2.0 Palm oil fatty acid diethanolamide 1.0 Polyethylene glycol 4.0 Oleyl alcohol 2.0 Synoxate 0.05 Perfume 0.2 Water Remainder Total 100 (Table 5) Example 9) A hair tonic having the following composition exhibited a good finish feeling and a long lasting effect of preventing damage by ultraviolet rays.

[0043]

Table 1 P-1 3.0% by weight Polyoxyethylene sorbite (5EO) monolauryl sulfate 0.3 Diisopropyl adipate 1.0 Disodium edetate 0.1 Ethyl paraaminobenzoate 0.1 Ethanol 40 Fragrance 0. 1 Water Remainder Total 100 (Example 10) A hair cream having the following composition showed a good finish feeling and sustained effect of preventing damage by ultraviolet rays.

[0044]

Table 7 P-1 6.0% by weight Polyoxyethylene oleyl ether (10EO) 3.0 Lanolin 3.0 Disodium edetate 0.1 Methyl parahydroxybenzoate 0.1 Glycerin 2.0 Methyl anthranilate 0. 1 Squalane 40 Fragrance 0.1 Water Remainder Total 100 (Example 11) A hair liquid having the following composition showed a good finish feeling and a long lasting effect of preventing damage by ultraviolet rays.

[0045]

Table 8 P-1 2.0% by weight propylene glycol 5.0 polyoxyethylene hydrogenated castor oil (60EO) 0.5 disodium edetate 0.05 2- (2-human peroxy-5-methylphenyl) benzotriazole 0.1 Ethanol 60 Fragrance 0.1 Water Remainder Total 100 (Example 12) A set lotion having the following composition showed a good finish feeling and sustained effect of preventing damage by ultraviolet rays.

[0046]

Table 9 P-1 3.0% by weight Glycerin 1.0 Polyoxyethylene lauryl ether (10EO) 1.0 Ethyl urocanate 0.05 Ethanol 20 Fragrance 0.1 Water Remainder Total 100 <Evaluation of results> As is clear from the comparison between Examples 1 to 5 and Comparative Examples 1 and 2, the hair cosmetics containing a specific amount of the amine oxide group-containing resin and the ultraviolet absorber of the present invention did not use any resin. Compared with the case (Comparative Example 1) and the case where no ultraviolet absorber was used (Comparative Example 2), the finished feeling of the hair was good and the durability of the effect of preventing damage to the hair by ultraviolet rays was excellent. .

[0047]

According to the present invention, by using an amine oxide group-containing resin and an ultraviolet absorber together, it is possible to protect the hair from being damaged by ultraviolet rays for a long time while giving the hair a natural finish. An excellent hair cosmetic is provided.

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Claims (4)

[Claims] 1. A hair cosmetic comprising an amine oxide group-containing resin in an amount of 0.01 to 20% by weight based on all components and an ultraviolet absorber in the same amount of 0.001 to 3% by weight. 2. The hair cosmetic according to claim 1, which contains 0.01 to 1% by weight of an ultraviolet absorber. 3. The ultraviolet absorber is at least one selected from the group consisting of paraaminobenzoic acid, octyl paramethylaminobenzoate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate and urocanic acid. Or the hair cosmetic according to 2. 4. The resin according to claim 1, wherein the amine oxide group-containing resin contains 15 to 100% by weight of a structural unit represented by any one of the following general formulas (1) to (5). The hair cosmetic according to any one of the preceding claims. Embedded image In the above formulas (1) to (5), R ¹ is a hydrogen atom or a methyl group, R ² , R ³ and R ⁴ are each independently an alkyl group, an aryl group or an aralkyl group, and X is a divalent bond. Y represents a methylene bond (—CH ₂ —), an imino bond (—NH—), an ether bond (—O—), or a thia bond (—S—), and m represents 0 or 1; ,
n is 1 or 2, one of p and q is 0, and the other is 1.