JPH05139931A - Manicure - Google Patents

Abstract

PURPOSE:To obtain a healthy and sate manicure not yellowing nails even by continuous long-term use. CONSTITUTION:The whole manicure is blended with 0.01-3.0wt.%, preferably 0.1-0.5wt.% substituted polyacetylene of the formula [R<1> is H, halogen or lower alkyl; R<2> is H, 1-8C alkyl, aryl or Si-containing monofunctional organic group (Preferably trimethylsilyl)] such as poly(1-trimethylsilylpropyne), poly(1- pentylpropyne), poly(1-tert-butylacetylene), poly(1-chlorophenylacetylene) or poly(1-ethyldimethylsilylpropyne), preferably poly(1-trimethylsilylpropyne) as an essential component to give a manicure having the above-mentioned effects. Since the polyacetylene has high oxygen permeability, the manicure permeates oxygen into skin, enables nail respire and shows the above-mentioned effects.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail enamel having improved nail safety.

[0002]

2. Description of the Related Art Generally, nail enamel includes (1) nitrocellulose, (2) alkyd resin, acrylic resin, and other resins.
(3) Plasticizers such as camphor, phthalate ester, and citric acid ester, (4) Organic solvents such as acetone, ethyl acetate, butyl acetate, methyl isobutyl ketone, ethanol, isopropanol, toluene, xylene, (5) Titanium, red iron oxide It is composed mainly of pigments such as.

In the case of a nail enamel having such a composition, when it is repeatedly used, the lipid on the surface of the nail plate is removed, and the water present in the nail plate in an amount of 7 to 12% easily evaporates. Therefore, the nail plate is dried and double nails are likely to occur, and gloss is not felt on the surface of the nail plate.

There are several known techniques for preventing such a situation. For example, for a nail enamel containing nitrocellulose and an organic solvent, Japanese Patent Application Laid-Open No.
Japanese Patent Application Laid-Open No. 62-111909 discloses a nail paint coating agent made of a water-soluble polymer aqueous solution. Japanese Patent Laid-Open Publication No. 54-28836 discloses a nail-enabling coating agent composed of an aqueous emulsion liquid polymer obtained by emulsion copolymerizing a specific monomer for nail-nails containing no organic solvent. ing. Furthermore, Japanese Examined Japanese Patent Publication Sho 55-43445
The publication discloses a nail varnish containing a polymer emulsion as a base.

[0005]

However, the harmful effects of the conventional nail enamel are not limited to the generation of such double nails and the elimination of luster. For example, if it is used continuously for a long period of time, it causes yellowing of the nails, which makes the nails unhealthy.

With respect to the problem of yellowing, it has been a reality that few nail polishes have been able to actually prevent it effectively. Therefore, it has been desired to develop a nail enamel that does not cause yellowing of the nail even when continuously used.

The present invention has been made to solve the above-mentioned problems, and the present invention provides a healthy and safe nail enamel that does not cause yellowing of the nail even after continuous long-term use. It is an issue.

[0008]

In order to achieve the above object, the nail enamel of the present invention has the general formula:

[0009]

[Chemical 2]

A substituted polyacetylene consisting of one or more repeating units represented by the formula (1) is contained in an amount of 0.01 to 3.0% by weight. However, in the formula, R ¹ is a hydrogen atom,
A substituent selected from the group consisting of a halogen atom and a lower alkyl group having 1 to 5 carbon atoms, R ² is a hydrogen atom, and 1 to 8 carbon atoms.
Represents a substituent selected from the group consisting of an alkyl group, an aryl group, and a monovalent organic group containing a silicon atom.

In the repeating unit of the substituted polyacetylene, R
^The substituent represented by 1 may be one kind in one molecule as a whole, or plural kinds may be selected at the same time. The same applies to each substituent represented by R ² , and one kind may be used, or plural kinds may be selected at the same time. Specific examples of such a substituted polyacetylene include poly (1-trimethylsilylpropyne), poly (1-pentylpropyne), poly (tert-butylacetylene), poly (1-chlorophenylacetylene), poly (1 -Ethyldimethylsilylpropyne) and the like.

These may be used alone or as a blend. Among them, poly (1-trimethylsilylpropyne) is preferable because it shows a high oxygen permeability coefficient. Further, the weight average molecular weight of the above-mentioned substituted polyacetylene is usually preferably 100,000 to 2,000,000.

The above-mentioned substituted polyacetylene is generally used in a composition comprising nitrocellulose, a resin, a plasticizer and a solvent.
It is included with these.

Examples of the resin constituting the above composition include alkyd resin and acrylic resin, and examples of the plasticizer include camphor, phthalic acid ester, citric acid ester and the like. Examples of the solvent include acetone, ethyl acetate, butyl acetate, methyl isobutyl ketone, ethanol, isopropanol, toluene, and xylene. In addition, the composition comprising these may further contain pigments such as titanium and red iron oxide, as well as dyes, etc. within a range not impairing the object of the present invention.

In the case of the present invention, the content of the substituted polyacetylene is 0.01 to 3.0% by weight, preferably 0.1 to 0.5% by weight based on the total amount of the nail enamel. If it is less than 0.01% by weight, the effect of suppressing yellowing of the nail enamel of the present invention cannot be expected. Further, even if it exceeds 3.0% by weight, improvement of the effect cannot be expected.

The above-mentioned nail enamel is applied to nails for use. When applied, it effectively forms an oxygen-permeable cosmetic film.

[0017]

In the nail enamel of the present invention, the substituted polyacetylene contained has a high oxygen permeability. Therefore, even if the nail is applied as a cosmetic, oxygen is constantly supplied to the nail under application, and the nail can continue breathing.

[0018]

[Effects of the Invention] With the nail enamel of the present invention, it is possible to maintain a safe and healthy nail without causing yellowing of the nail even if it is continuously used for a long period of time.

[0019]

EXAMPLES Examples of the present invention will be described in detail below. However, the present invention is not limited to this.

Examples 1 to 3 A red nail enamel was obtained by a conventional method according to the formulation shown in Table 1. The blending amount in the table is% by weight.

Comparative Example A red nail enamel was obtained by a conventional method according to the formulation shown in Table 1 as in Examples 1 to 3.

[0022]

[Table 1]

<Nail Safety (Yellow Inhibition) Confirmation Test> 40 people, whose nails tend to yellow when a regular nail polish is continuously used, were selected as the panel and obtained in Examples 1 to 3 and Comparative Example 1. Ten people were allocated for each case regarding the nail enamel. Each panel was made to use each nail material once every two days continuously for 3 months. After the period of use, the proportion of panels that had nail abnormalities, especially yellowing of the nails, was investigated.

[0024]

[Table 2]

Example 1 Incorporating a Substituted Polyacetylene
It was found that Nos. 3 to 3 had a higher effect of suppressing yellowing of the nails, as compared with Comparative Examples in which they were not mixed.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mikio Endo 28-1 Nishi-Fukushima, Kikugashi-mura, Nakakubiki-gun, Niigata Prefecture 1 Shin-Etsu Chemical Co., Ltd.

Claims (2)

[Claims] 1. A general formula: (In the formula, R ¹ is a substituent selected from the group consisting of a hydrogen atom, a halogen atom and a lower alkyl group, R ² is a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aryl group, a monovalent group containing a silicon atom. A substituted polyacetylene composed of one or more kinds of repeating units represented by (a substituent selected from the group consisting of organic groups) of 0.01 to 3.0% by weight. Nail charge. 2. The nail enamel according to claim 1, wherein the monovalent organic group containing a silicon atom is a trimethylsilyl group.