JPH0564609B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a new gel-like enamel remover, and more particularly to a gel-like enamel remover that is excellent in portability, texture during use, odor, removal power, and mild feeling after use. BACKGROUND TECHNOLOGY Enamel removers are known that use acetone, ethyl acetate, alcohol, etc. as a main base, and blend oil, water, dye, etc. as necessary. Such liquid enamel removers have excellent removal power and are widely used. Also,
A gel nail lacquer remover disclosed in Canadian Patent No. 1154347 is known as a remover in which a solvent for enamel remover is gelled. This gel-like nail polish remover uses acetone and water as a medium, and contains polyacrylic acid and tertiary amine as a neutralizing agent, as a gelling agent, and has added portability. It is new. However, since the gelling agent of this gel remover is composed of polyacrylic acid alone, it has very poor texture and significantly impairs its functionality as a gel enamel remover. That is, when the remover is used on the nail, it has major drawbacks such as the remover slipping off the nail, impairing the removal power, or adhering to clothes, causing contamination. Problems to be Solved by the Invention The conventional enamel remover described above has the following problems: (1) Since the container is a glass or plastic bottle, it lacks portability and there is a risk of contamination of clothes due to damage to the container. (2) It has a degreasing and dehydrating effect on nail components, and is not mild and can lead to damage to the nails, as typified by double nails, cracked nails, and yellowing of the nails. (3) The unique odor of the solvent is strong and causes discomfort during use. (4) As mentioned above, the gel nail polish remover of Canadian Patent No. 1154347 has very little texture, and its resin properties as a gel remover are significantly impaired. Although many studies have been conducted to improve these various drawbacks, these problems are still unsolved. As a result of intensive research aimed at improving these drawbacks of the prior art, the present inventors discovered that polyacrylic acid as a gelling agent and a basic substance as its neutralizing agent, and hydroxypropyl cellulose in acetone and water as a medium, as well as hydroxypropyl cellulose. We have discovered that a gelled enamel remover containing the following is excellent in portability, texture during use, odor, removal power, and mild feeling after use, and based on this knowledge, we have completed the present invention. I've reached it. Means for Solving the Problems and Their Effects That is, the present invention uses a solvent and water as a medium, and contains polyacrylic acid as a gelling agent and a basic substance and hydroxypropyl cellulose as its neutralizing agent. The present invention provides a gelled enamel remover. The structure of the present invention and its effects will be explained below. As the solvent used in the gel-like enamel remover of the present invention, acetone, which has been conventionally used for enamel removers, is mainly used.
It is not limited to the use of acetone alone, and alcohol, propylene carbonate, etc. can be added in part as necessary. Such a solvent is preferably incorporated in the gel enamel remover in an amount of 60 to 80% by weight. If the amount of solvent is too small, the enamel removal ability tends to be poor, and if it is too large, the solvent has a strong odor and tends to lead to damage to the nails. The amount of water used in the gel remover of the present invention is preferably 1.0 to 30.0% by weight. If the water content is less than 1.0% by weight, gel formation tends to be insufficient, and if it exceeds 30% by weight, the removal power tends to be poor. The polyacrylic acid used in the gel enamel remover of the present invention can be any of those commonly used in cosmetics, such as Hivis Wako 103, 104, manufactured by Wako Pure Chemical Industries, Ltd.
105 or BFGoodrich
Commercially available products such as Carbopol 934, 940, and 941 from Chemical Co.) can be used. The amount of polyacrylic acid blended is not particularly limited, but is generally 0.1% by weight or more, preferably 0.3 to 3.0% by weight. Concentration of polyacrylic acid is 0.1% by weight
Below 3.0, gelation tends to be weaker;
If it exceeds % by weight, the mild feeling after use tends to be impaired. The basic substance used in the gel enamel remover of the present invention can be any basic substance commonly used in cosmetics. Such basic substances include, for example, potassium hydroxide,
Representative examples include sodium hydroxide and aliphatic amines. Aliphatic amines include primary, secondary and tertiary alkanolamines or alkylamines. Specific examples of alkanolamines include monoethanolamine, diethanolamine, diisopropanolamine, triethanolamine, triisopropanolamine, 2-aminomethylpropanol, and the like. Also,
Examples of the alkylamine include dimethylamine, diethylamine, trimethylamine, and triethylamine. Other basic amino acids such as lysine and arginine can also be used. In the gel-like enamel remover of the present invention, the pH of the system is preferably adjusted to 5.0 to 8.0 using the above-mentioned basic substance. If the pH of the system is less than 5.0, gel formation tends to be insufficient, whereas if it exceeds 8.0, the gel state may be significantly impaired due to aggregation of polyacrylic acid, which is not preferable. The hydroxypropyl cellulose used in the gel-like enamel remover of the present invention can be any of those commonly used in cosmetics. For example, HPC-H (molecular weight
1 million), HPC-G (molecular weight 300,000), HPC-L (molecular weight 100,000), HPC-E (molecular weight 60,000) and Nippon Soda Co., Ltd.
HPC-H (molecular weight 250,000-400,000), HPC-M (molecular weight 110,000-150,000), HPC-L (molecular weight 5,500-7,000)
etc. can be given. Although there is no particular limitation on the amount of hydroxypropyl cellulose, the amount is preferably 0.1 to 5.0% by weight. If the blending amount is less than 0.1% by weight, it tends to be difficult to obtain the feel of the remover, while if it exceeds 5.0% by weight, the texture tends to be too high and the mild feel is impaired. In addition to the above-mentioned essential ingredients, the gel-like enamel remover of the present invention contains ingredients commonly used as additives for cosmetics such as moisturizers, drugs, dyes, pigments, pearl agents, and ultraviolet absorbers. can be blended under qualitative and quantitative conditions that do not impede the purpose of the present invention. Effects of the Invention As described above, according to the present invention, portability, texture,
To provide a gel-like enamel remover with excellent odor, removal power, and mild feel. The gel-like enamel remover of the present invention is a gel-like remover with a particularly textured texture, which prevents it from slipping on the nail, compared to, for example, the gel-like nail polish remover of prior art Canadian Patent No. 1154347. For,
There is no risk of problems such as loss of removal power or contamination of clothes. In addition, since the gel-like enamel remover according to the present invention has a gel-like form, the strong odor of the solvent is suppressed, eliminating discomfort during use, and moreover, it has all the characteristics required as an enamel remover. It is a gel-like enamel remover. Examples Hereinafter, the present invention will be explained in more detail with reference to Examples, but it goes without saying that the scope of the present invention is not limited to these Examples. In addition, the compounding amount is weight%.

[Table] (Manufacturing method) Ingredients, , and were dissolved with stirring, and any one of the ingredients and components ~ was added thereto and dissolved with stirring. These ingredients were then added to increase the viscosity to prepare an enamel remover. (Effect) The gel removers of Example 1 and Comparative Examples 1 to 6 obtained above were filled into a 30 ml tube container, and the gel state, texture during use, odor, removal power, and mild feeling after use were evaluated as follows. Evaluation was made according to the criteria. 1 Gel condition: Evaluate gel transparency by visual inspection. Very transparent and clean ◎ Highly transparent and clean ○ Opaque and slightly agglomerated △ Opaque and quite agglomerated × 2 Texture during use: Sensory evaluation of the slippage of the remover when placed on the nail. Very hard to slip off ◎ Slightly hard to slip off ○ Slightly easy to slip down △ Very easy to slip down × 3 Odor...Sensory evaluation Very weak odor ◎ Slightly weak odor ○ Slightly strong odor △ Very strong odor × 4. Removal power: Enamel was applied to the nails, and the removal power was evaluated the next day. Comes off very well ◎ Comes off fairly well ○ Slightly hard to come off △ Very hard to come off × 5 Mild feeling after use...Sensory evaluation Very mild feeling ◎ Somewhat mild feeling ○ No mild feeling △ Very no mild feeling × Implementation The evaluation results of Example 1 and Comparative Examples 1 to 6 were as shown in Table 1.

[Table] As is clear from the results in Table 1, the gel enamel remover of Example 1 was excellent in terms of portability, gel state, texture, odor, removal power, and mild feeling after use. . On the other hand, comparative example 1
The ones have no texture at all and tend to slide on the nails, which is undesirable. Moreover, those of Comparative Examples 2 to 6 are significantly inferior in terms of gel state, texture, etc., and are not preferable.

【table】

[Table] (Manufacturing method) Components, , and were dissolved with stirring, and the components and were dissolved therein. Next, ingredients were added to this to form a gel.

【table】

[Table] As can be seen from the results in Table 2, Examples 2, 3, and 4
The gel-like enamel remover No. 6 and No. 6 were excellent in terms of portability, gel state, texture, odor, removal power, and mild feeling after use. On the other hand, Comparative Example 7 is a case in which the amount of polyacrylic acid is extremely small, but it is unfavorable in terms of gel state, portability, texture, and odor. Furthermore, Comparative Example 8 contained too much polyacrylic acid and was inferior in terms of mild feeling after use. Comparative Examples 9 and 10 are cases in which the PH of the system was adjusted to 4.5 and 8.5 with a basic substance, and the pH of the system was adjusted to 4.5 and 8.5.
This is not preferable because gel formation is insufficient. Also,
At pH 8.5, significant aggregation of polyacrylic acid occurs, making gel formation impossible, which is not preferable. Furthermore, Comparative Example 11 has a significantly small amount of hydroxypropyl cellulose, and is inferior in texture, which is a very important property for a gel-like enamel remover. Furthermore, as in Comparative Example 12, when hydroxypropyl cellulose is present in too much amount, the mild feeling after use is lost, resulting in unfavorable results. In Example 5, the solvent was acetone alone, but in this case, the mild feeling after use was slightly impaired. As is clear from the above results, the gel-like enamel remover of the present invention is a gel-like enamel remover that is excellent in portability, texture during use, odor, removal power, and mild feeling after use.

Claims (1)

[Scope of Claims] 1. A gel-like enamel remover, which uses a solvent and water as a medium, and contains polyacrylic acid as a gelling agent, a basic substance as a neutralizing agent thereof, and hydroxypropyl cellulose. 2. The gel-like enamel remover according to claim 1, wherein the blended amount of polyacrylic acid is 0.1% by weight or more. 3 Claim 1 in which the basic substance is potassium hydroxide, sodium hydroxide or an aliphatic amine
Gel-like enamel remover as described in section. 4 The aliphatic amine is primary, secondary or tertiary
4. The gel-like enamel remover according to claim 3, which is a grade alkanolamine or alkylamine. 5. The gel-like enamel remover according to claim 1, wherein the pH is adjusted to 5.0 to 8.0 with a neutralizing agent. 6 The amount of hydroxypropyl cellulose is
The gel-like enamel remover according to claim 1, wherein the content is 0.1 to 5.0% by weight.