JPH0840833A - Manicure agent - Google Patents

Abstract

PURPOSE:To provide a manicure agent excellent in quick-drying and durability. CONSTITUTION:This manicure agent contains 0.1-20.0wt.% of a copolymer mainly comprising (A) at least one selected from alkyl acrylates and alkyl methacrylates and (B) at least one selected from acrylic acid and methacrylic acid wherein the acid value of the copolymer is 30-100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved new nail enamel, and more particularly to an nail enamel mainly containing acetic acid ester as a solvent, which is excellent in quick-drying property and makeup lasting property.

[0002]

2. Description of the Related Art A nail enamel comprises a nitrocellulose-based resin dissolved in an organic solvent such as butyl acetate, ethyl acetate, and toluene together with a plasticizer, and a pigment made of organic bentonite or the like. The pigment is dispersion-stabilized, and the organic solvent is volatilized after application to fix the nitrocellulose film containing the dye and the pigment to the nail surface. Various quick-drying nail varnishes have been studied so far, and those which accelerate drying by increasing the vapor pressure of the solvent system by using a low boiling point solvent such as acetone have been developed. This is accompanied by the drawback that bubbles are generated in the film and a uniform coating film cannot be formed. on the other hand,
Although an acrylic silicone resin has been developed to accelerate the drying of the surface, it has a drawback that it has poor makeup durability and is easily peeled off or abraded by impact or friction. As described above, the nail enamel excellent in both quick-drying property and long-lasting makeup has not yet been developed, and its development has been an urgent need.

[0003]

Means for Solving the Problems As a result of intensive studies in view of the above problems, the present inventor has mainly studied one or more of alkyl acrylates and methacrylic acid alkyl esters and one or more of acrylic acid and methacrylic acid. In the copolymer formed by copolymerization, blending one or more of acrylic acid and methacrylic acid so that the acid value of the copolymer is 30 to 100, and blending the copolymer into the nail enamel. It has been found that, after the application, the drying after application is fast and the makeup lasting property is good.

That is, the present invention comprises one or more of acrylic acid alkyl ester and methacrylic acid alkyl ester,
In a copolymer mainly composed of one or more of acrylic acid and methacrylic acid, the acid value of the copolymer is 30 to
By containing 0.1 to 20.0% by weight of the copolymer of 100, a nail enamel excellent in both quick-drying property and makeup lasting property is provided.

The structure of the present invention will be described in detail below. Used in the present invention, one or more of acrylic acid alkyl ester, methacrylic acid alkyl ester, acrylic acid,
In a copolymer obtained by copolymerizing with one or more of methacrylic acid, the alkyl group of the acrylic acid alkyl ester and the methacrylic acid alkyl ester preferably has 1 to 8 carbon atoms, and among them, the methacrylic acid alkyl ester includes methyl methacrylate and methacrylic acid. Hydroxyethyl acid is preferable, and as the acrylic acid alkyl ester, ethyl acrylate, hydroxyethyl acrylate, butyl acrylate,
Hexyl acrylate and octyl acrylate are preferred.

The copolymerization ratio of acrylic acid and methacrylic acid is such that the acid value of the copolymer is 30 to 100, preferably the copolymer having an acid value of 50 to 80. When the acid value of the copolymer is less than 30, the quick-drying property and makeup lasting property are not improved, and when it exceeds 100, the polarity of the copolymer is too high and the water resistance of the film is deteriorated.

Further, if the acid value of the copolymer is maintained at 30 to 100, an acrylic acid alkyl ester, a methacrylic acid alkyl ester and a vinyl monomer other than acrylic acid and methacrylic acid are used in combination. It can be polymerized. Examples of this include styrene, acrylonitrile, vinyl acetate, acrylic acid amide, and the like.

The acid value of this copolymer was measured by titration according to the second method of the acid number measuring method, which is a general test method for cosmetic raw materials, except that an equal volume mixture of ethanol and acetone was used as a solvent.

The amount of this copolymer to be added to the nail enamel is 0.1.
If the amount is less than 0.1% by weight, the quick-drying property and the durability of makeup are not improved, and if the amount exceeds 20.0% by weight, the viscosity of the nail enamel becomes high, which is not preferable.

The solvent for the nail enamel of the present invention is mainly a mixed system of butyl acetate, ethyl acetate and toluene, and if necessary alcohols such as ethanol, n-propanol, isopropanol, n-butanol and t-butanol. Can also be added.

In the nail enamel of the present invention, it is possible to use nitrocellulose, toluenesulfonamide resin, alkyd resin and the like in addition to the above-mentioned copolymer, and also a colorant, a plasticizer, a viscosity modifier ( A gelling agent), an antioxidant, a fragrance and the like can be appropriately mixed.

As the colorant to be mixed in the nail enamel of the present invention, any colorant that can be used in cosmetics may be used. Red No. 201, Red No. 202, Red No. 220, Red 225
No. 226, Red No. 226, Yellow No. 4 Aluminum Lake, Yellow No. 5 Aluminum Lake, Blue No. 1 Aluminum Lake, Yellow No. 401, Blue No. 404, and other pigments, titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, Gunjou , Inorganic pigments such as camphor, carbon black, titanium mica, mica, and talc.

The plasticizer blended in the nail enamel of the present invention is blended in order to adjust the hardness of the copolymer, and is dibutyl phthalate, butyl cellosolve, camphor, acetyltriethyl citrate, acetyl citrate. In addition to known plasticizers such as tributyl, propylene carbonate, 2,2,4-
Low boiling point esters such as trimethylpentanediol-1,3-monoisobutyrate can also be used as plasticizers.

The viscosity adjusting agent (gelling agent) blended in the nail enamel of the present invention maintains the viscosity at which the nail enamel is easily applied,
Also, it is added for the purpose of preventing the sedimentation of the pigment,
Known viscosity modifiers such as dimethyl distearyl ammonium hectorite and benzyl dimethyl stearyl ammonium hectorite can be used.

Tocopherol or its derivative can be used as an antioxidant to be mixed in the nail enamel of the present invention.

[0016]

EXAMPLES The effects of the present invention will be described in more detail below with reference to examples. First, the nail enamel of each Example was prepared by the composition of Examples 1-6. Here, all the numerical values in the table are% by weight.

Example 1

[0018]

[Table 1]

Example 2

[0020]

[Table 2]

Example 3

[0022]

[Table 3]

Example 4

[0024]

[Table 4]

Example 5

[0026]

[Table 5]

Example 6

[0028]

[Table 6]

Further, each nail enamel was prepared by the composition of Comparative Examples 1 to 3.

Comparative Example 1

[0031]

[Table 7]

Comparative Example 2

[0033]

[Table 8]

Comparative Example 3

[0035]

[Table 9]

Then, the following practical characteristic tests were carried out, and the results are shown in Table 10. In the practical property test, 20 female panelists applied nail enamel to the nails, and the cosmetic effect was evaluated on a scale of 5 (5: good, 4: good, 3: normal, 2: bad, 1: bad). Was evaluated and the average value was taken.

[0037]

[Table 10]

From Table 10, it is clear that all of the examples are superior in quick-drying property and makeup durability to the comparative examples.

[0039]

The nail enamel of the present invention has excellent effects on both quick-drying property and makeup lasting property.

Claims (1)

[Claims] 1. A copolymer comprising, as main constituents, at least one of alkyl acrylate and alkyl methacrylic acid and at least one of acrylic acid and methacrylic acid, and the acid value of the copolymer is from 30 to 100. 0.1 to 20.0% by weight of the copolymer is a nail enamel.