JP3080803B2 - Water based nail polish - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION An object of the present invention is to provide a water-based beauty nail preparation having excellent pigment dispersion stability.

[0002]

2. Description of the Prior Art Conventionally, nail polish has used an organic solvent such as butyl acetate, ethyl acetate, and toluene, and is flammable and has a solvent odor during application. there were. Furthermore, degreasing of the nail is easily caused by the organic solvent, and there is a problem in safety for the nail.

[0003] On the other hand, various types of nail polish which do not use an organic solvent have been studied, for example, JP-A-54-28836, JP-B-55-43445, and JP-B-61-10.
No. 43, Japanese Patent Publication No. Sho 62-61002, etc.
Nail preparations containing a polymer emulsion or an aqueous resin have been proposed.

However, all of these use untreated inorganic pigments, and due to the hydrophilicity of the inorganic pigments and the difference in specific gravity with water, all of the pigments settle out over time and are shaken before use. However, they do not mix well, and the desired color tone is not applied. Further, in these publications, an activator or a gelling agent is used to disperse the inorganic pigment. However, with this alone, at a viscosity of 1000 cp or less that can be applied without causing unevenness in application as a nail pill, It was difficult to completely prevent pigment settling.

In Japanese Patent Application Laid-Open No. 4-103515, a hydrated oxide of a polyvalent metal element is used together with a cationic polymer emulsion in order to improve the pigment dispersion stability. However, since the pH of the cationic polymer emulsion is low, It was difficult to mix and use with an acrylic emulsion having a pH of 7 to 9.

Further, Japanese Patent Application Laid-Open No. 4-103516 discloses a method for improving the appearance and gloss of a nail polisher by pulverizing a polymer emulsion and a pigment together to make the pigment finer. However, it was difficult to completely prevent sedimentation of the pigment over time as long as the additional test was conducted.

[0007]

Means for Solving the Problems In view of such problems, the present inventors have made intensive studies and have found that a silicon-treated pigment in which the surface of an inorganic pigment is coated with silicon and a polyoxyethylene-based nonionic surfactant are blended. As a result, it has been found that an inorganic pigment can be stably compounded in a water-based nail polish containing an acrylic resin emulsion.

It is also found that the use of a copolymer emulsion obtained by copolymerizing an alkoxysilane unsaturated monomer represented by the general formula (I) as an acrylic resin emulsion further increases the pigment dispersion stability. I started.

That is, according to the present invention, a silicon-treated pigment in which at least 0.1 to 10.0% by weight of silicon is coated on the surface of an inorganic pigment with respect to a base pigment, 10.0% by weight or less,
Polyoxyethylene nonionic surfactant 0.01-1
By blending 0.0% by weight and 5.0 to 40.0% by weight of an acrylic resin emulsion as a solid content, an aqueous nail polish having excellent pigment dispersion stability is provided.

Hereinafter, the configuration of the present invention will be described in detail. The inorganic pigment serving as a base of the siliconized pigment used in the present invention can be used as a base as long as it is an inorganic pigment to be blended in cosmetics, and titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, gunjou , Konjo, chromium oxide,
Examples include chromium hydroxide, talc, mica, mica titanium, iron oxide treated mica titanium, konjo treated mica titanium, carmine treated mica titanium, barium sulfate, and composites thereof.

Silicon coated on these base pigments may be a linear polyorganosiloxane such as methylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexene. It is selected from modified silicons such as cyclic polyorganosiloxanes such as sasiloxane or derivatives thereof, and the coating method is performed by a known method such as a baking treatment or a gas phase polymerization method. Of course, silicon may be further bonded after coating with another oil agent, or may be coated with another oil agent. As a result, the silicon-treated pigment of the present invention may be any pigment in which the surface of the pigment is coated with silicon or a silicon derivative. All can be used. The coating amount of silicon described above is 0.1 to 10.0% by weight based on the base pigment.
It is. When the coating amount is 0.1% by weight or less, the dispersion stability of the inorganic pigment is poor, and when the coating amount is 10.0% by weight or more, the viscosity of the nail polish increases, which is not preferable because unevenness occurs during application. Of course, two or more of these silicons may be used in combination.

The polyoxyethylene nonionic surfactant used in the present invention includes polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, and polyoxyethylene. It is selected from castor oil, polyoxyethylene hydrogenated castor oil and the like.

The acrylic resin emulsion used in the present invention is an aqueous emulsion of a copolymer containing at least a monomer selected from the group consisting of acrylic acid, methacrylic acid and their alkyl esters or derivatives. The monomer of is not particularly limited,
Styrene, vinyl acetate and the like may be copolymerized.

The monomers selected from the group consisting of acrylic acid, methacrylic acid or their alkyl esters or derivatives include acrylic acid, methacrylic acid, ethyl acrylate, methyl methacrylate, octyl acrylate, acrylonitrile, acrylamide and the like. However, an emulsion obtained by copolymerizing a derivative of acrylic acid or methacrylic acid containing an alkoxysilane represented by the general formula (I) is preferable in terms of pigment dispersion stability and cosmetic durability. For example, acryloxytrimethoxysilane and methacrylic acid Roxytrimethoxysilane, acryloxytriethoxysilane, methacryloxytriethoxysilane, acryloxytriethoxymethoxysilane, methacryloxytriethoxymethoxysilane, methacryloxyethyltrimethoxysilane Methacryloxyethyl triethoxysilane, methacryloxypropyl trimethoxysilane,
Methacryloxypropyltriethoxysilane and the like can be mentioned.

The amount of the siliconized pigment used in the present invention is preferably 0.1 to 10.0% by weight or less,
It is increased or decreased according to the color tone of the nail polish. If the content is 10.0% by weight or more, the viscosity of the nail enamel increases, which is not preferable because unevenness occurs during application.

The amount of the polyoxyethylene-based nonionic surfactant used in the present invention is preferably 0.01 to 0.01.
１10.0% by weight, which is increased or decreased according to the blending amount of the siliconized pigment. When the content is 0.01% by weight or less, the dispersion stability of the pigment is poor. When the content is 10.0% by weight or more, the viscosity of the nail polishes increases, and not only unevenness occurs at the time of application, but also the long-lasting makeup tends to deteriorate.

The amount of the acrylic resin emulsion used in the present invention is preferably from 5.0 to 5.0 as solids.
When the content is 40.0% by weight or less, the effect of forming a film of the nail enamel is poor when the content is less than 5.0% by weight. Is increased, and unevenness tends to occur during coating, which is not preferable. This acrylic resin emulsion may contain two or more acrylic resin emulsions.

The nail polish of the present invention may contain other pigments, pigments and dyes in addition to the above essential components. Tar pigments are relatively stable even when used as is,
Of course, it may be blended by silicon treatment as needed. If necessary, a surfactant other than the polyoxyethylene-based nonionic surfactant, a plasticizer, a viscosity modifier (gelling agent), a preservative, a fragrance, and the like can be appropriately compounded.

[0019]

EXAMPLES Hereinafter, the effects of the present invention will be described in more detail with reference to examples. According to the compositions of Tables 1 to 9, the nail polish of each Example and Comparative Example was adjusted. Here, all numerical values in the table are% by weight. This nail polish was manufactured by pulverizing and mixing a pigment and a pigment together with a surfactant in a roller mill, then uniformly mixing with an acrylic resin emulsion and other components at about 60 ° C., and then cooling to room temperature. . In addition, defoaming was performed under reduced pressure as needed to remove air contained in the nail preparation.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

[0023]

[Table 4]

[0024]

[Table 5]

[0025]

[Table 6]

[0026]

[Table 7]

[0027]

[Table 8]

[0028]

[Table 9]

Next, the pigment dispersion stability test of the nail polishes of Examples and Comparative Examples was carried out, and the results are shown in Table 10. The pigment dispersion stability test was carried out by observing the daily change in the stationary state in each of the constant temperature baths at 5 ° C., 30 ° C., and 45 ° C. ,
Δ: pigment sedimentation in 1 week, ×: pigment sedimentation in 3 days or less).

[0030]

[Table 10]

Further, practical property tests of the nail prep of Examples and Comparative Examples were conducted, and the results are shown in Tables 11 to 12. In the practical characteristics test, a nail polish was applied to the nails of 20 female panelists, and the quality of use (ease of application, uneven color, drying speed, gloss, finish, makeup durability) was evaluated on a five-point scale (5: good, 4: Slightly good, 3: Normal, 2: Slightly bad, 1: Poor, and averaged in 4 steps (A: 4 or more, O:
3-4, Δ: 2-3, ×: 2 or less).

[0032]

[Table 11]

[0033]

[Table 12]

From Table 10, it is evident that all of the examples are more excellent in pigment dispersion stability than the comparative examples.

From Tables 11 to 12, it is clear that all of the examples have equal or better evaluations in practical characteristics than the comparative examples.

[0036]

The water-based nail polishes of the present invention have excellent pigment dispersion stability.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61K ^7/ 00-7/50 CA (STN)

Claims (2)

(57) [Claims] 1. An inorganic pigment containing, on the surface thereof, a silicon-treated pigment in which silicon is coated in an amount of 0.1 to 10.0% by weight based on a base pigment, a polyoxyethylene nonionic surfactant, and an acrylic resin emulsion. Water-based nail polish characterized by 2. The aqueous system according to claim 1, wherein the acrylic resin emulsion is a copolymer emulsion obtained by copolymerizing at least one kind of an alkoxysilane unsaturated monomer represented by the following general formula (I). Beauty nails. Embedded image