JPH072627B2 - Nail polish - Google Patents

Description

TECHNICAL FIELD The present invention relates to an extremely useful nail enamel, and more specifically, to an organic bentonite and / or a nail enamel base.
Alternatively, the present invention relates to a nail enamel characterized in that organic montmorillonite and hydrophobic silica are essentially blended.

That is, the object of the present invention is to provide a nail enamel which has no sedimentation of an inorganic pigment or a pearly luster and is excellent in stability over time, and has good film properties and usability.

[Prior Art] Generally, nail polishes include an inorganic pigment such as titanium, mica, titanium mica, or a pearly luster for imparting a makeup effect together with a film-forming agent, a resin, a plasticizer, a solvent and the like. include. However, these inorganic pigments and pearly lusters have a large specific gravity and settled with the lapse of time, which adversely affects the appearance, cosmetic effect, and usability of the nail enamel, which may cause quality deterioration.

In the past, various efforts have been made in addition to the use of the induced modified clay mineral as a pigment anti-settling agent in order to prevent sedimentation of such a substance having a large specific gravity in the nail enamel and maintain the dispersion stability.

For example, JP-A-47-40375 discloses, "A cosmetic base characterized by mixing and dispersing an organic bentonite or organic montmorillonite and an inorganic acid or an organic acid, and then dispersing a pearlescent pigment. Fee. "Is disclosed.

"Problems to be solved by the invention" However, although organic modified clay minerals have an effect of preventing pigment settling, when used in a large amount, the glossiness (luster) of the coating film
And the viscosity of the product system becomes high, and the usability such as ease of application becomes poor, so there is a quantitative limitation, and it is difficult to obtain sufficient effects by itself. In the method of adding a general inorganic acid or organic acid to the nail enamel, even if the pearlescent agent (pearlescent pigment) can be prevented from settling, the discoloration or fading of the organic pigment is promoted,
This is an effect that causes deterioration of the physical properties of the film and is not always satisfactory.

As described above, it was still difficult to prepare a product in which the sedimentation of the inorganic pigment and the pearly luster was prevented without deteriorating the film physical properties of the nail enamel, the usability, and the discoloration and fading of the organic pigment. .

[Means for Solving Problems] The present inventors have conducted various studies in view of the above circumstances, and as a result, by blending organic bentonite and / or organic montmorillonite with hydrophobic silica in a nail base. It was found that it has a remarkable effect in preventing the sedimentation of inorganic pigments and pearlescent agents, does not cause discoloration and fading of organic pigments, and does not deteriorate the film physical properties and usability, and completed the present invention with this knowledge. It was.

That is, the present invention relates to a nail enamel characterized by essentially containing organic bentonite and / or organic montmorillonite and hydrophobic silica.

Next, the configuration of the present invention will be described.

The organic bentonite or organic montmorillonite used as an essential component in the present invention is usually known as an organic modified clay mineral, and a bentonite or montmorillonite is chemically bonded with a cationic activator and a nonionic higher organic polar compound. It is a substance. For example, Benton 27, 34, 38 manufactured by NL Industries Co., Ltd. can be mentioned, and any of them can be used. These are arbitrarily selected according to need and used alone or in combination. The blending amount may be in the range of 0.1 to 5.0% by weight, and the present invention can be sufficiently achieved in this range.

The hydrophobic silica essential for the present invention includes Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.,
Taranox 500 manufactured by Tarcoin Corporation is exemplified. Aerosil R-972 is based on silica, with some of the hydrophilic hydroxyl groups normally covering the silica surface converted to dimethyldichlorosilane groups, and Taranox 500.
Is produced by hydrophobizing it by substituting its hydroxyl group with a trimethylsiloxane group. The blending amount is not particularly limited, but is preferably in the range of 0.1 to 1.0% by weight for the present invention. If the amount is less than this range, the effect is not sufficiently exerted, and as the amount used increases, the gloss of the finished coating film and the viscosity of the product system increase, and the usability such as ease of application tends to be adversely affected. And the above range is sufficient.

Further, the nail enamel of the present invention naturally contains, in addition to the above-mentioned essential components, a film-forming agent, a resin, a plasticizer, a solvent, a pigment and a pearly luster which are usually used in nail enamel. , A fragrance, an ultraviolet absorber, a moisturizer, and other trace ingredients can be appropriately selected and blended.

EXAMPLES Next, the present invention will be further described with reference to examples.
It should be noted that these do not limit the present invention in any way.

Example [1] In order to confirm the effect of the present invention on the nail enamel, the nail enamel was prepared as shown in Table 1 and the effect of the addition of silica was examined. In the table, the blending amount is parts by weight.

(Manufacturing method) Components (1) to (17) are mixed to obtain a product according to a conventional method.

Using the nail enamel of the samples 1 to 3 obtained as described above, the properties thereof were compared in terms of the viscosity of the product system, the glossiness of the coating film, and the stability over time, and the results are shown in Table 2.

(Evaluation) a Viscosity Clay on the day after the sample preparation was measured by a B-type viscometer, and the nail base of the sample was evaluated as a control product.

○ Good without any change △ Slightly thickened and deteriorated × Thickened and deteriorated b Gloss of coating film After taking a sample on black color-developed paper and forming a film with a certain thickness,
The sample was visually observed, and the nail base of the sample was evaluated as a control product.

○ Gloss △ Slightly glossy × No luster c Stability over time After leaving the sample in a constant temperature bath at 40 ° C for 1 month, visually inspect its appearance for the presence of sedimentation of inorganic pigments and pearlescent agents, and sample the nails The fee base was evaluated as a control.

◎ Very good ○ Good × Sedimentation As is clear from the results in Table 2, in the case of the sample containing hydrophobic silica, the viscosity change of the product system in the case of samples containing dry method silica and wet method silica However, while the glossiness of the coating film was lowered and the inorganic pigment / pearl luster was precipitated with time, extremely good results were obtained without such a phenomenon.

That is, it is understood that the hydrophobic silica is the most suitable for the present invention because it has an excellent effect of preventing the precipitation of the inorganic pigment / pearl luster and does not affect the viscosity of the product system and the gloss of the coating film.

Example [2] The effect of adding hydrophobic silica in the nail enamel was examined by changing the compounding ratio.

The samples are (1) to (14) in the formulation of Table 1 of Example [1].
It was prepared by changing the addition amount of the hydrophobic silica of (15) to the base of a nail enamel consisting of the above components. However, in this case, component (11)
The amount of toluene was controlled and the total amount was set to 100% by weight.

The samples thus obtained were examined in terms of product system viscosity, stability over time, and film physical properties, and the results are shown in Table 3.

(Evaluation) a Viscosity Evaluation was performed in the same manner as described in Example [1].

b Glossiness of coating film Evaluation was performed in the same manner as described in Example [1].

c Hardness of coating film After measurement according to the pencil scratch test in JIS K5400, the sample was evaluated as a control product.

○ Good with no change △ Slightly decreased × Reduced d Adhesion of coating film After measurement according to the cross cut test (crosscut test) in JIS K5400, the sample was evaluated as a control product.

◯ Good without any change Δ Slightly decreased × Reduced e Stability over time Evaluation was performed in the same manner as described in Example [1].

As can be seen from Table 3, in the sample-that is, in the nail enamel containing hydrophobic silica within 1.0% by weight, the inorganic pigment
The pearlescent agent did not settle out, was excellent in stability over time, and had little effect on the viscosity of the product system and the physical properties of the film (glossiness, hardness, adhesion of the coating film), and had very good results. Further, the nail enamel of the present invention did not cause discoloration or fading of the organic pigment.

Example [3] (Formulation) (wt%) (1) Nitrocellulose 8.5 (2) Alkyd resin 10.0 (3) Sucrose acetate isobutyrate
5.0 (4) Dibutyl phthalate 0.5 (5) dl-camphor 0.4 (6) Organic montmorillonite 1.0 (7) Isopropanol 3.5 (8) Ethanol 4.0 (9) Ethyl acetate 29.5 (10) Butyl cellosolve 5.0 (11) Toluene 24.4 ( 12) Oxybenzone 0.5 (13) Iron oxide 2.0 (14) Titanium mica 3.0 (15) Color pigment 2.0 (16) Hydrophobic silica 0.7 (Production method) Components (1) to (16) are mixed and manufactured according to the usual method. And

[Effects of the Invention] As described above, the present invention relates to a nail enamel containing an organic bentonite and / or an organic montmorillonite and hydrophobic silica in the nail enamel base, and the effect is obtained by using these components as essential components. Is effectively exhibited, and the settling prevention of the inorganic pigment and pearly luster is remarkably improved without impairing the characteristics of the nail enamel.

Thus, the nail enamel of the present invention does not cause precipitation of inorganic pigments, pearlescent agents, discoloration of organic pigments, stability over time, excellent cosmetic effects, and excellent film physical properties and usability. It is useful.

That is, according to the present invention, it is possible to provide a high-quality nail enamel that has an unprecedented appearance and functionality.

Claims (1)

[Claims] 1. A nail enamel which essentially contains organic bentonite and / or organic montmorillonite and hydrophobic silica.