JP3149291B2 - Composition for beautiful nails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for nails containing a pigment or dye which is dispersed in water using a resin.
More particularly, the present invention relates to a composition for a beautiful nail containing a pigment or a dye having good dispersibility in water and excellent compatibility with a resin.

[0002]

2. Description of the Related Art Conventionally, nail polish called nail polish is
Generally, it is obtained by mixing a nitrocellulose-based lacquer and a dye with an organic solvent. However, organic solvents have health problems and may also degrade the physiological function of nails and skin. Therefore, development of an aqueous nail polish using water as a solvent instead of an organic solvent is desired. For example, JP-A-3-133916 and JP-A-4-2974
No. 08 discloses an aqueous nail polish containing an aqueous composite polymer emulsion having a multilayer structure. Japanese Patent Application Laid-Open No. 4-103513 discloses that the difference in glass transition temperature is 10%.
An aqueous nail polish containing two or more types of acrylic polymer emulsions having a temperature of at least 0 ° C. is disclosed.

[0003] However, in these water-based nail polishes, improvement of the physical properties of the resin component is the main problem, and the dispersibility of pigments and dyes as pigment components in water and compatibility with the resin component are all important. Was not considered at all. However, the aqueous nail polish has a problem in that the pigment or dye does not settle and is not uniformly dispersed in water as a solvent, and the color of the coating film becomes uneven. In addition, there is a problem that the compatibility with the resin component is poor, and as a result, the color of the coating film becomes uneven.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aqueous nail polish composition containing a pigment or dye having good dispersibility in water and good compatibility with resin components. .

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, in the presence of a pigment or a dye, an ethylenically unsaturated monomer is polymerized to convert the pigment with a resin. The present inventors have found that a pigment composite having good dispersibility and excellent compatibility with a resin component can be obtained by forming a water dispersion as a composite.

That is, the present invention relates to a composition for nails comprising an aqueous dispersion obtained by polymerizing at least one ethylenically unsaturated monomer in the presence of a pigment or dye. .

Hereinafter, the present invention will be described. In the present specification, (meth) acrylate, (meth) acrylic acid and (meth) acrylamide are methacrylate, acrylate; methacrylic acid, acrylic acid; methacrylamide and acrylamide, respectively. means.

In the present invention, pigments and dyes include:
Known or commercially available pigments and dyes can be used as they are, and there is no particular limitation on the type and the like. However, the particle diameter of the pigment is 0.1 0.1 in consideration of the dispersibility and the like of the obtained composite aqueous dispersion.
It is appropriate that the thickness be 10 μm.

Examples of the pigment include an inorganic pigment and an organic pigment. Further examples of inorganic pigments include mica-like iron oxide, lead white, lead red, graphite, silver vermilion, ultramarine, navy blue, cobalt oxide, titanium dioxide, titanium dioxide coated mica, strontium chromate, titanium yellow, titanium black, zinc Examples include chromate, iron black, molybdenum red, molybdenum white, litharge, lithopone, emerald green, guinea green, cadmium yellow, cadmium red, and cobalt blue.

Examples of organic pigments include Amaranth (Red No. 2), Erythrosin (Red No. 3), Newcoxin (Red No. 102), Phloxin B (Red No. 104 (1)), and Rose Bengal (Red No. 105) (1)),
Acid Red (Red No. 106), Tartrazine (Yellow No. 4), Sunset Yellow FCF (Yellow No. 5), Fast Green FCF (Green No. 3), Brilliant Blue F
CF (blue No. 1), indigo carmine (blue No. 2), lithol rubin B (red No. 201), lithol rubin BC
A (Red No. 202), Lake Red C (Red 203
No.), Rake Red CBA (Red No. 204), Lisor Red (Red No. 205), Lisor Red CA (Red 2
No. 06), Risor Red BA (Red No. 207), Risor Red SR (Red No. 208), Rhodamine B (Red No. 213), Rhodamine B acetate (Red 214)
No.), rhodamine B stearate (Red No. 215), tetrachlorotetrabromofluorescein (Red 218)
No.), Brillian Lake Red R (Red No. 219),
Tip Maroon (Red No. 220), Toluidine Red (Red No. 221), Tetrabromofluorescein (Red No. 223), Sudan III (Red No. 225), Helind Pink CN (Red No. 226), Fast Acid Magenta (Red No. 227) , Permaton red (red 228
No.), Eosin YS ((1) of Red No. 230), Eosin YSK ((2) of Red No. 230), Phloxine BK
(Red 231), Rose Bengal K (Red 232)
No.), dibromfluorescein (dark orange 201)
No.), permanent orange (Orange No. 203),
Benzidine Orange G (Dai No. 204), Orange II (Dai No. 205), Diiodofluorescein (Dai No. 206), Erythrosin Yellow NA (Dai No. 207), Fluorescein (Yellow No. 201), Uranine (Yellow) No. 202 (1)), uranine K (yellow 2
02 (2)), quinoline yellow SS (yellow 204
No.), Benzidine Yellow G (Yellow No. 205), Alizaricin Anin Green F (Green No. 201), Quinizarin Green SS (Green No. 202), Pyranin Conch (Green No. 2)
No. 04), light green SF yellow (green No. 205), indigo (blue No. 201), patent blue NA (blue 2)
02), Patent Blue CA (Blue No. 203), Carbansrene Blue (Blue No. 204), Alphazurin F
G (blue No. 205), resorcinol brown (brown color 20)
No. 1), alizulin purple SS (purple No. 201), violamine R (red No. 401), brilliant fast scarlet (red No. 404), permanent red F5
R (Red No. 405), medicinal scarlet (Red 501)
No.), Ponceau 3R (Red No. 502), Ponceau R (Red No. 503), Ponceau SX (Red No. 504), Oil Red XO (Red No. 505), Fast Red S (Red No. 506), Hansa Orange (Dark color) No. 401),
Orange I (Daily No. 402), Orange SS (Daily No. 403), Hansa Yellow (Yellow No. 401),
Polar Yellow 5G (Yellow 402), Naphthol Yellow S ((1) of Yellow 403), Yellow AB (Yellow 404)
No.), Yellow OB (Yellow No. 405), Methanil Yellow (Yellow No. 406), Fast Light Yellow 3G (Yellow No. 4)
No. 07), naphthol green B (green 401), guinea green B (green 402), sudan blue B (blue 403), phthalocyanine blue (blue 404)
No.), Alizur purple (purple No. 401) and naphthol blue black (black No. 401).

As the dye, acid dyes (for example, orange
II, aminonaphthol red G), azo acid dyes (eg, metanil yellow), anthraquinone acid dyes (eg, alizarin irisol R, anthraquinone violet), basic dyes (eg, auramine, astraphloxine), vat dyes (eg, , Miketoren Brill Pink R, Miketoren Orange R) and the like.

As the pigment and dye, commercially available pigments and dyes can be used as they are for polymerization, but if necessary, a known surface treatment can be applied for the purpose of improving the adhesiveness to a resin and the like. As surface treatment agents, silane coupling agents,
Water-soluble polymers such as hydroxymethylcellulose, hydroxyethylcellulose and hydroxypropylcellulose can be used.

In the present invention, examples of the ethylenically unsaturated monomer include alkyl (meth) acrylates having a linear, branched or cyclic alkyl group, aromatic vinyl compounds and polymerizable unsaturated monomers in the molecule. A mixture of at least one monomer selected from monomers having two or more groups and a monomer having a carboxyl group, an amide group and / or a hydroxyl group can be used.

The alkyl (meth) acrylates having a linear, branched or cyclic alkyl group include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate and n-butyl (meth) acrylate. , Isobutyl (meth) acrylate, n-amyl (meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, isohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate , Isooctyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate, and the like. Examples of the aromatic vinyl compound include styrene such as styrene, α-methylstyrene, p-tert-butylstyrene, and p-methylstyrene, and derivatives thereof. Examples of the monomer having two or more polymerizable unsaturated groups in the molecule include ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, divinylbenzene, and trivinyl. Benzene and the like can be mentioned.

Examples of the monomer containing a carboxyl group include ethylenically unsaturated carboxylic acids such as (meth) acrylic acid, maleic acid, fumaric acid and itaconic acid. Amide group-containing monomers include (meth) acrylamide, N-methylol (meth) acrylamide, N-
Examples include alkoxymethyl (meth) acrylamide. Further, as a monomer containing a hydroxyl group, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate,
There are hydroxyalkyl (meth) acrylates such as polyethylene glycol mono (meth) acrylate.

Further, in the present invention, in addition to an aqueous dispersion obtained by polymerizing a mixture of the above monomers in the presence of a pigment or a dye,
At least one selected from alkyl (meth) acrylates having a linear, branched or cyclic alkyl group, aromatic vinyl compounds, and monomers having two or more polymerizable unsaturated groups in the molecule The monomer is emulsion-polymerized in the presence of a pigment or a dye, and then has a linear, branched or cyclic alkyl group (meth) in the presence of the polymer (A-phase).
Alkyl acrylates, aromatic vinyl compounds,
And copolymerizing at least one monomer selected from monomers having two or more polymerizable unsaturated groups in the molecule with a monomer having a carboxyl group, an amide group and / or a hydroxyl group Includes aqueous dispersions produced by obtaining the polymer (B-phase). Here, “alkyl (meth) acrylates having a linear, branched or cyclic alkyl group, aromatic vinyl compounds, and monomers having two or more polymerizable unsaturated groups in the molecule” and "Carboxyl group,
The “monomer having an amide group and / or a hydroxyl group” is as described above.

The resin of the dispersed particles of the aqueous dispersion obtained by the above two-stage polymerization has two phases, A-phase and B-phase. The weight ratio of the A-phase and the B-phase is, for example, 5/95 to 95.
/ 5 is preferred from the viewpoint that the pigment (dye) -resin composite aqueous dispersion has excellent drying properties, film formability, and adhesion. The Tg of the A-phase and the B-phase are respectively -20 to +
70 ° C and -60 to + 70 ° C, and the Tg difference between the two phases is 0 to 60 ° C
Wherein the Tg of the A-phase is equal to or greater than the Tg of the B-phase, whereby the composition for a beautiful nail containing the pigment (dye) -resin composite aqueous dispersion has excellent film-forming properties, and is water-resistant and durable. This is preferable from the viewpoint that a coating film having excellent adhesion is obtained and the adhesion of the coating film is excellent.

The resin constituting the aqueous dispersion used in the present invention has, for example, a weight average molecular weight of 50,000 or more, preferably 10
It is preferable that the number is 10,000 or more from the viewpoints of the drying property, water resistance, durability and the like of the composition for nails containing the pigment (dye) -resin composite aqueous dispersion. The upper limit of the weight average molecular weight of the resin is not particularly limited, but may be, for example, 2,000,000 or less, more generally 1,000,000 or less.

Hereinafter, a method for producing the aqueous dispersion used in the present invention will be described. The aqueous dispersion used in the present invention can be produced by any of emulsion polymerization and solution polymerization. Known methods can be used for both the emulsion polymerization method and the solution polymerization method.

Emulsion polymerization method In the case of emulsion polymerization, a monomer is added to a solvent in which a pigment or a dye is dispersed (in the case of emulsion polymerization, water or water containing a surfactant), and the polymerization initiator is placed in a reaction vessel in parallel. It is performed by dropping all at once, continuously or dividedly. Further, the polymerization initiator can be added to the solvent in advance. In this case, the monomer may be mixed in advance with water and a surfactant, and then added dropwise as an emulsion. The aqueous dispersion having two phases, A-phase and B-phase, is preferably produced by an emulsion polymerization method.

The surfactants used herein include, for example, sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium alkyldiphenyletherdisulfonate, sodium alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, sodium stearate, potassium oleate, Anionic surfactants such as sodium dioctyl sulfosuccinate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate; sodium dialkyl sulfosuccinate, sodium stearate, sodium oleate Anionic surfactants such as polyoxyethylene lauryl ether and polyoxyethylene Emissions octylphenyl ether, polyoxyethylene oleyl phenyl ether, polyoxyethylene nonyl phenyl ether, oxyethylene-
Nonionic surfactants such as oxypropylene block copolymers; cationic surfactants such as lauryltrimethylammonium chloride and stearyltrimethylammonium chloride; If the amount of the surfactant is less than 0.1 part by weight, the polymerization stability of the product tends to decrease, and if it exceeds 10 parts by weight,
There is a tendency for the water resistance and the like of the coating film to decrease.

The polymerization temperature varies depending on the type of the monomer and the polymerization initiator and the like, but is usually in the range of 30 to 90 ° C.
Examples of the polymerization initiator include persulfates such as hydrogen peroxide, ammonium persulfate and potassium persulfate; azo initiators such as azobisisobutyronitrile; cumene hydroperoxide, t-butyl hydroperoxide and the like. Organic peroxides; redox initiators obtained by combining these persulfates or peroxides with metal ions such as iron ions, and reducing agents such as sodium sulfoxylate, sodium pyrosulfite, and L-ascorbic acid; . These initiators are used, for example, in an amount of 0.1 to 4 parts by weight based on 100 parts by weight of the total solids. Further, when performing the emulsion polymerization, a chain transfer agent such as mercaptan can be added to adjust the molecular weight.

Solution polymerization method In the case of emulsion polymerization, the polymerization is carried out by dropping a monomer into an organic solvent in which a pigment or a dye is dispersed, separately from a polymerization initiator, all at once, continuously or dividedly into a reaction vessel. In addition, the above-mentioned thing can be used as a polymerization initiator as it is. Examples of the organic solvent include alcohol-based, ketone-based, ester-based, and ether-based solvents. Examples of the alcohol-based solvent include methanol, ethanol, n-propanol, isopropanol and the like, and preferably isopropanol. Examples of the ketone-based solvent include acetone, methyl ethyl ketone, diethyl ketone, and the like, and preferred is methyl ethyl ketone. or,
These can be used alone or in combination of two or more. The polymerization temperature varies depending on the type of the organic solvent, the monomer and the polymerization initiator, but is usually in the range of 40 to 150 ° C. The phase inversion of the obtained reaction mixture from the organic solvent solution to the aqueous system can be performed by a conventional method. That is, while stirring the organic solvent solution, room temperature to 80 ° C, preferably room temperature to 60 ° C.
After adding water together with the surfactant at the temperature described above and inverting the aqueous phase, the organic solvent is distilled off under normal pressure or reduced pressure to obtain an aqueous dispersion. The above-mentioned surfactants can be used as they are.

The particle size of the obtained pigment (dye) -resin composite aqueous dispersion is 0.01 to 0.01 in consideration of the density of the obtained coating film.
Optimally, about 0.3 μm. The weight ratio of the pigment or dye to the resin is preferably such that the resin content is, for example, 3 to 1000 parts by weight with respect to 1 part by weight of the pigment or dye in consideration of the specific gravity, dispersion stability and the like. It is.

The composition for nails of the present invention contains the pigment (dye) -resin composite aqueous dispersion described above and is generally produced as an aqueous composition having a pH in the range of 6 to 10. For pH adjustment, amines such as ammonia and triethanolamine and pH adjusters such as sodium hydroxide may be used. The composition for nails of the present invention suitably contains the above-mentioned pigment (dye) -resin composite aqueous dispersion, for example, in an amount of 5 to 70% by weight.

Further, the composition for beautiful nails of the present invention may further comprise, in addition to the above aqueous dispersion, a drug such as vitamin E; an ultraviolet absorber; a bactericide; a preservative; a fragrance; Agents, for example, glycol-based film-forming agents; for example, silicon-based film smoothing agents; or, for example, acrylic-based synthetic thickeners or natural-based thickeners such as, for example, xanthan gum. These additives can be added at a ratio used for a general nail polish, and are used, for example, in the range of 0.001 to 10% by weight, preferably 0.1 to 3% by weight.
In addition, if necessary, a pigment such as a pearl pigment or a pigment paste; a dye such as an organic dye; a dispersing aid (an anti-settling agent) such as bentonite or montmorillonite can be further included.

Further, the composition for nails of the present invention comprises, as an aqueous resin, an anionic polyurethane having a carboxyl group or the like and a polyurethane which is a base addition salt thereof; primary, secondary, tertiary amines, etc. Polyurethanes having the following cationic groups and cationic polyurethanes which are acid addition salts and quaternary ammonium salts thereof; amphoteric polyurethanes such as amino acid type and betaine type; nonionic properties produced by using polyethylene glycol, polyhydric alcohol, etc. as a monomer component An aqueous resin composition such as a polyurethane; an aqueous acrylic resin, an aqueous styrene resin, an aqueous acrylic-styrene resin produced by a general-purpose emulsion polymerization method; an aqueous polyethylene emulsion; or an alkali-soluble resin may be further included. These aqueous resins are used in an amount of 30% by weight or less, preferably 15% by weight or less, based on the total weight of the nail polish composition, for the purpose of hardness, gloss, weather resistance, adhesion, antistatic and the like. Preferably it is used at 10% by weight or less.

The composition for nails of the present invention is provided substantially as an aqueous composition, but the organic solvent used in the production of the above aqueous resin is contained as long as it does not cause skin irritation. You may. Examples of such an organic solvent include ethanol, isopropanol, acetone, and methyl ethyl ketone. Further, a small amount of a volatile aqueous organic solvent can be added for the purpose of promoting drying of the resin film of the composition for beautiful nails of the present invention or for the purpose of sterilization. Examples of such a volatile aqueous organic solvent include ethanol and isopropanol.
These organic solvents are used in an amount of 1 to the total weight of the composition for nails.
Used at 0% by weight or less.

When using the composition for beautiful nails of the present invention,
The nail may be brush-applied, and the applied nail polish composition is dried and hardened in a short time to give a tough colored resin film. When the nail composition of the present invention is applied to a nail with a thickness of about 0.04 mm, the curing time of the resin film is generally about 30 to 80 seconds at room temperature.

The colored resin film formed by applying the composition for beautiful nails of the present invention is easily removed by an organic solvent such as toluene, xylene, acetone, ethyl acetate, ethanol, etc., which has been conventionally used as a photoluminescence liquid. can do. Further, the cured film can be removed with water or a uniform mixture of water and an organic solvent without using the above organic solvent alone. Since the use of an organic solvent alone may cause skin irritation and liver damage, it is preferable to use water or a homogeneous mixture of water and an organic solvent as a photoluminescence liquid.

[0031]

The present invention will be described below in detail with reference to Examples and Reference Examples.

Example 1 As a pretreatment, 10 g of a 1% γ-aminopropyltriethoxysilane-ethanol solution was added to 2.00 g of Red No. 202
And 1.00 g of titanium oxide was uniformly sprayed and thoroughly mixed, and then ethanol was volatilized. Next, pure water 33.02g compounding vessel equipped with a homomixer, polyoxyethylene nonylphenyl ether (EO) ₁₀ 0.2
Then, 2.00 g of Red No. 202 and 1.00 of titanium oxide were charged, and high-speed stirring was performed to disperse the pigment in pure water. In a reaction vessel equipped with another stirrer, condenser, thermometer and dropping device, first, a solution in which the pigment was dispersed, 0.5 g of sodium dodecylbenzenesulfonate
And the temperature was adjusted to 70 ° C. in a nitrogen atmosphere with stirring.

Next, 8.85 g of methyl methacrylate,
Styrene 15.00 g, n-butyl acrylate 11.
00 g, i-butyl acrylate 14.00 g, methacrylic acid 1.15 g and n-dodecyl mercaptan 0.1 g.
30 g were mixed and placed in cylinder A. Also, 0.75 g of ammonium persulfate is dissolved in 7.5 g of pure water, put in another cylinder B, and adjusted so that cylinder A and cylinder B are dropped into the reaction vessel at the same time, and the reaction is continuously performed for 3 hours. The reaction was carried out by dropping into a container. After aging for 1 hour, it was cooled to room temperature, and 5%
4.63 g of aqueous ammonia was added, pH 7.8, resin content 5
A 0% aqueous dispersion composition was obtained. The raw materials used are shown in Table 1.

Example 2 35.00 g of methyl ethyl ketone and 1.00 g of Red No. 220 were charged into a compounding vessel equipped with an explosion-proof homomixer, and high-speed stirring was performed to disperse the pigment in a solvent. The solution in which the pigment was dispersed was previously added to a reaction vessel equipped with another stirrer, condenser, thermometer and dropping device, and the temperature was adjusted to 80 ° C. in a nitrogen atmosphere with stirring. Next, 8.85 g of methyl methacrylate, 15.00 g of styrene, n
11.00 g of -butyl acrylate, 14.00 g of i-butyl acrylate, 1.15 g of methacrylic acid and 0.50 g of azobisisonitrile were mixed, placed in a cylinder, and continuously dropped into the reaction vessel over 3 hours.
After completion of the dropwise addition, the mixture was aged for 1 hour, cooled to room temperature, 4.63 g of 5% aqueous ammonia was added as a neutralizing agent with stirring, and 43.87 g of pure water was added. Then, methyl ethyl ketone was distilled off under reduced pressure. Thus, an aqueous dispersion composition having a pH of 7.5 and a resin content of 50% was obtained. The raw materials used are shown in Table 1.

Example 3 25.21 pure water was placed in a mixing vessel equipped with a homomixer.
g., 0.10 g of sodium dodecylbenzenesulfonate, 5.00 g of Red No. 202 and 0.50 g of Red No. 226 were charged, and high-speed stirring was performed to disperse the pigment in water. Into a reaction vessel equipped with another stirrer, condenser, thermometer and dropping device, the solution in which the pigment was dispersed and 0.10 g of sodium lauryl sulfate were initially charged, and the temperature was adjusted to 70 ° C. under stirring in a nitrogen atmosphere. . Next, 10.00 g of methyl methacrylate, 21.87 g of styrene, n
-Butyl acrylate 3.75 g, methacrylic acid 1.
The mixture of 88 g was placed in cylinder A. Also, 1.00 g of ammonium persulfate was dissolved in 10.0 g of pure water, put in another cylinder B, and adjusted so that cylinder A and cylinder B were dropped into the reaction vessel at the same time, and the reaction was continuously performed for 2 hours. It was dropped into the container. After completion of the dropwise addition, the mixture was aged for 1 hour.

Further, sodium lauryl sulfate was added to the reaction vessel in an amount of 0.1 mL.
10 g was added, and the temperature was adjusted to 70 ° C. in a nitrogen atmosphere with stirring. Next, 4.25 g of methyl methacrylate, i-
7.50 g of butyl actylate, 0.6 of methacrylic acid
A mixture of 2 g and 0.13 g of acryl amide was placed in the cylinder C. Also, ammonium persulfate 0.5
0 g was dissolved in 5.0 g of pure water, placed in another cylinder D, adjusted so that cylinder C and cylinder D were dropped into the reaction vessel at the same time, and continuously dropped for 2 hours. After completion of the dropwise addition, the mixture was aged for 1 hour. Thereafter, the mixture was cooled to room temperature, and 5% ammonia water 2.4 as a neutralizing agent was stirred.
9 g was added to obtain an aqueous dispersion composition having a pH of 7.6 and a resin content of 50%. The raw materials used are shown in Table 1.

Example 4 Pure water 34.41 was added to a compounding vessel equipped with a homomixer.
g, polyoxyethylene nonyl phenyl ether (E
O) ₁₀ 0.10 g was charged, and Red No. 220 0.80
g, Yellow No. 4 (0.20 g) were charged, and the mixture was stirred at high speed to disperse the pigment in pure water. First, a solution in which a pigment is dispersed and 1.00 g of sodium dodecylbenzenesulfonate are added to a reaction vessel equipped with another stirrer, a condenser, a thermometer, and a dropping device.
Adjusted to ° C. Next, methyl methacrylate 4.25
g, i-butyl acrylate 7.50 g, methacrylic acid 0.62 g, and acryl amide 0.13 g were mixed and placed in cylinder A.

Further, 0.50 g of ammonium persulfate was dissolved in 5.00 g of pure water, and the solution was placed in another cylinder B. The cylinder A and the cylinder B were adjusted so as to be dropped into the reaction vessel at the same time, and were continuously dropped into the reaction vessel over 2 hours to react. After aging for 1 hour,
Further, methyl methacrylate 10.00 g, styrene 2
1.87 g, 3.75 g of n-butyl acrylate, and 1.88 g of methacrylic acid were mixed and placed in cylinder C.
Further, 0.50 g of ammonium persulfate was dissolved in 5.00 g of pure water, and the solution was placed in another cylinder D. Cylinder C
And the cylinder D were dropped into the reaction vessel at the same time, and the reaction was continued by dropping continuously over 2 hours. After aging for 1 hour, the mixture was cooled to room temperature, and 2.49 g of 5% aqueous ammonia was added as a neutralizing agent with stirring to adjust the pH to 7.3.
An aqueous dispersion composition having a resin content of 50% was obtained. The raw materials used are shown in Table 1.

Comparative Example 1 36.32 g of pure water and 0.5 g of sodium dodecylbenzenesulfonate were charged into a reaction vessel equipped with a stirrer, a condenser, a thermometer and a dropping device, and stirred at 70 ° C. in a nitrogen atmosphere. Was adjusted. Next, 8.85 g of methyl methacrylate, 15.00 g of styrene, 11.00 g of n-butyl acrylate, and 1-butyl acrylate 1
4.00 g, 1.15 g of methacrylic acid and 0.30 g of n-dodecyl mercaptan were mixed and placed in cylinder A. Also, 0.75 g of ammonium persulfate was dissolved in 7.5 g of pure water, and the solution was placed in another cylinder B.
And the cylinder B were dropped into the reaction vessel at the same time, and were continuously dropped into the reaction vessel over 3 hours to cause a reaction. After aging for 1 hour, the mixture was cooled to room temperature, and 4.63 g of 5% aqueous ammonia was added as a neutralizing agent with stirring.
An aqueous dispersion composition having H7.8 and a resin content of 50% was obtained. The raw materials used are shown in Table 1.

Comparative Example 2 A reactor equipped with a stirrer, a condenser, a thermometer and a dropping device was charged with 30.81 g of pure water and 0.10 g of sodium lauryl sulfate, and stirred at a temperature of 70 in a nitrogen atmosphere under stirring.
Adjusted to ° C. Next, methyl methacrylate 10.00
g, 21.87 g of styrene, 3.75 g of n-butyl acrylate, and 1.88 g of methacrylic acid were put in the cylinder A. Also, 1.00 g of ammonium persulfate was dissolved in 10.0 g of pure water, put in another cylinder B, and adjusted so that cylinder A and cylinder B were dropped into the reaction vessel at the same time, and continuously over 2 hours. It was dropped into the reaction vessel. After completion of the dropwise addition, the mixture was aged for 1 hour.

Further, sodium lauryl sulfate was added to the reaction vessel in an amount of 0.1%.
10 g was added, and the temperature was adjusted to 70 ° C. in a nitrogen atmosphere with stirring. Next, 4.25 g of methyl methacrylate, i-
7.50 g of butyl actylate, 0.6 of methacrylic acid
A mixture of 2 g and 0.13 g of acryl amide was placed in the cylinder C. Also, ammonium persulfate 0.5
0 g was dissolved in 5.0 g of pure water, placed in another cylinder D, adjusted so that cylinder C and cylinder D were dropped into the reaction vessel at the same time, and continuously dropped into the reaction vessel over 2 hours. After completion of the dropwise addition, the mixture was aged for 1 hour. Thereafter, the mixture was cooled to room temperature, and 2.49 g of 5% aqueous ammonia was added as a neutralizing agent with stirring to obtain an aqueous dispersion composition having a pH of 7.6 and a resin content of 50%. The raw materials used are shown in Table 1.

[0042]

[Table 1]

Note 1: 1% γ-aminopropyltriethoxysilane-ethanol solution Note 2: Reaction initiator Note 3: Molecular weight regulator

Formulation Examples 1 to 6 Into a beaker equipped with a homomixer, put each of the aqueous dispersions of Examples and Comparative Examples, and further add each of the components shown in Table 2 or Table 3 little by little to completely disperse them. Thus, a uniform nail composition of the present invention was obtained. About the obtained composition for beautiful nails, the uniformity of the appearance and the color tone of the film was evaluated. The results are shown in Tables 2 and 3.

[0045]

[Table 2]

[0046]

[Table 3]

Evaluation Method (1) Appearance A colorless and transparent glass bottle having a capacity of 120 ml and an inner diameter of 30 to 40 mm, having a polyethylene inner lid and a screw-type outer lid, and in a sealable container, each of Formulation Examples 1 to 6 Into a separate container, seal and keep at a temperature of 45 ± 2 ° C.
The state (phase separation, solid content separation) of the sample after 24 hours was visually observed and evaluated. (2) Uniformity of the color tone of the coating The sample stored in the same manner as in (1) was applied to nails with a nail polish brush, and the uniformity of the color tone accompanying the pigment dispersibility of the dried film was visually observed and evaluated. .

[0048]

According to the present invention, it is possible to provide a water-based nail polish composition containing a pigment having good dispersibility in water and compatibility with a resin component.

──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Noriyuki Uejima 1900 Togo, Mogo-shi, Chiba Prefecture Inside Mitsui Toatsu Chemicals Co., Ltd. (72) Inventor Takahiro Shikuma 1900 Togo, Togo, Mobara-shi, Chiba Mitsui Toatsu Chemicals In-company (56) References JP-A-4-342712 (JP, A) JP-A-4-103516 (JP, A) JP-A-3-206018 (JP, A) JP-A-3-112917 (JP, A) JP-A-1-261320 (JP, A) JP-A-64-16711 (JP, A) JP-A-63-203606 (JP, A) JP-A-63-115810 (JP, A) JP-A-58-1983 128312 (JP, A) JP-A-54-129137 (JP, A) JP-A-54-28836 (JP, A) JP-A-52-139732 (JP, A) JP-A-6-299075 (JP, A) JP-A-6-216630 (JP, A) JP-A-6-298624 (JP, A) JP-A-6-2279 45 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61K 7/043

Claims (5)

(57) [Claims] 1. A composition for nails comprising an aqueous dispersion obtained by polymerizing at least one ethylenically unsaturated monomer in the presence of a pigment or dye. 2. An ethylenically unsaturated monomer comprising a (meth) acrylic acid alkyl ester having a linear, branched or cyclic alkyl group, an aromatic vinyl compound and two polymerizable unsaturated groups in the molecule. A mixture of at least one monomer selected from the above-mentioned monomers and a monomer having a carboxyl group, an amide group and / or a hydroxyl group.
The composition for beautiful nails according to the above. 3. An alkyl (meth) acrylate having a linear, branched or cyclic alkyl group, an aromatic vinyl compound and a monomer having two or more polymerizable unsaturated groups in the molecule. Emulsion polymerization or solution polymerization of at least one kind of monomer in the presence of a pigment or dye, and then, in the presence of this polymer, a (meth) acrylic acid alkyl ester having a linear, branched or cyclic alkyl group, At least one monomer selected from an aromatic vinyl compound and a monomer having two or more polymerizable unsaturated groups in a molecule, and a monomer having a carboxyl group, an amide group and / or a hydroxyl group. A composition for a beautiful nail, comprising an aqueous dispersion produced by copolymerization. 4. The composition for a beautiful nail according to claim 1, wherein the pigment is an inorganic pigment or an organic pigment. 5. The composition for beautiful nails according to claim 1, wherein the dye is an acid dye, a basic dye or a vat dye.