JPS6210010A - Depilatory - Google Patents

Abstract

PURPOSE:To obtain a depilatory capable of removing hair without causing acute pain nor generating ill odor, by using a system composed of dissolved polymeric compound and a system containing a component capable of causing the phase-separation of the former system and forming a coating film of the polymeric compound, and adding a depilatory agent to at least one of the above systems. CONSTITUTION:The objective depilatory is composed of (A) a system consisting of a dissolved polymeric compound composed of a film-forming polymeric compound and a solvent capable of dissolving said compound and (B) a system containing a component capable of causing the phase-separation of the system A and forming a coating film of the polymeric compound, preferably a poor solvent of the polymeric compound or a component capable of changing the pH of the system A thereby insolubilizing the above polymeric compound, wherein at least one of the systems A and B contains a depilatory agent. Since the body hair can be softened by the depilatory agent in the depilatory, the hair can be removed without causing acute pain, and since the coating film is peeled off in a state trapping the body hair in the film, the hair can be removed beautifully without causing the problems of ill odor generation and the post-treatment of the skin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a hair removal agent that can beautifully remove hair from the human body without causing severe pain or unpleasant odor.

[Conventional technology]

Conventionally, depilatory agents have been put into practical use in the form of wax and in the form of creams containing depilatory drugs. In the case of hair removal creams, hair removal is performed by applying the cream to the area to be removed, leaving it for a predetermined period of time, and then wiping it off.

However, such a method has problems in that when the hair removal cream is wiped off, an unpleasant odor is generated due to the decomposition of body hair by the drug, and skin irritation occurs due to strong rubbing.

Furthermore, when wax is used, there is a problem in that it is physical hair removal and is accompanied by severe pain.

[Problem that the invention seeks to solve]

Therefore, it is an object of the present invention to provide a hair removal agent that enables hair removal treatment without causing severe pain or unpleasant odor.

[Means for solving problems]

The present invention provides a hair removal agent consisting of a two-component system: a system consisting of a dissolved polymer compound (system A), and a system containing a component that phase-separates the system A and forms a film of the polymer compound (system B). Regarding.

The A system used in the present invention consists of at least a polymer compound having film-forming ability (hereinafter also simply referred to as a polymer compound) and a solvent that can dissolve this.

The polymer compound having film-forming ability is not particularly limited as long as it has film-forming ability and can achieve the object of the present invention, and it may be either water-soluble or water-insoluble. Examples of water-soluble polymer compounds include polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid and its salts, polyacrylamide, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyethylene glycol, gum arabic, gelatin, casein, etc. Examples of the water-insoluble polymer compound include acrylic, butyral resin, urethane, polyvinyl acetate, polyacrylic ester, and saponified ethylene-vinyl acetate copolymer. These may be used alone or as a mixture of a plurality of them.

In the case of a water-soluble polymer compound, it is provided in the form of an aqueous solution, and in the case of a water-insoluble polymer compound, it is dissolved in a solvent in which the polymer compound can be dissolved.

The solvent that can dissolve the water-insoluble polymer compound is preferably one that is less irritating to the skin; , water-ethyl alcohol, etc.). Of course, the water-soluble polymer compound is used after being dissolved in water or an aqueous solvent.

The A system is preferably in the form of a solution, but may be in the form of a sol or paste.

The amount of the polymer compound added to system A is sufficient to provide a strength that allows the film to be easily peeled off from the skin of the depilated area when the film is formed. The amount can be adjusted depending on the selected polymer compound, but it is usually 1 to 70% by weight.
Preferably it is 2 to 50% by weight.

It is preferable to further incorporate a hair removal drug into the A-based composition.

There are no particular restrictions on the hair removal drug, and conventionally known drugs may be used. Specific examples include thioglycolic acid and its salts, strontium sulfate, sodium sulfide, barium sulfide, calcium sulfide, etc., and a mixture of one or more of these may be used. Hair loss drugs are 1 in A series.
~15% by weight, preferably 3~12% by weight.

Other fragrances, hair swelling promoters, etc. may be added to the A system as desired.

The B system is composed of a component that phase-separates the above A system to form a film of a polymer compound, and is not particularly limited as long as it has such a function. Such components include, for example, a poor solvent for the polymer (aspect ①),
Preferable examples include those that change the pH of the system and make the polymer compound insoluble (aspect ①).

For Mr. B, the components contained in the B system make the polymer compound in the A system insoluble or hardly soluble, causing phase separation of the A system and forming a film of the polymer compound, which is removed from the hair removal area. It is characterized by being easily peeled off.

In this embodiment, the A system includes at least a polymer compound,
and a solvent. On the other hand, the B system consists of a poor solvent for the polymer compound in the A system.

Regarding the B system in this embodiment, when the polymer compound is water-soluble, as a poor solvent for the polymer compound,
Examples include alcohols such as ethyl alcohol, propyl alcohol, and benzyl alcohol, mixtures thereof, and mixtures of these and water (e.g., water-ethyl alcohol), and those that are least irritating to the skin, specifically, Ethyl alcohol, propyl alcohol, hensyl alcohol and the like are preferred. Furthermore, when the polymer compound is water-insoluble, water or an aqueous solvent is used.

Examples of the polymer compound used as A-based in embodiment (2) include polyvinyl alcohol, polyvinylpyrrolidone,
Water-soluble polymer compounds such as polyacrylic acid and its salts, polyacrylamide, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, hydroquinepropylcellulose, polyethylene glycol, gum arabic, acrylic, butyral resin, urethane, polyvinyl acetate, polyacrylic acid Preferred examples include water-insoluble polymer compounds such as esters, saponified ethylene-vinyl acetate copolymers, and polyvinyl methyl ether.

Aspect (2) is that the components contained in system B change the pH in system A to cause phase separation of system A to form a film of a polymer compound, which can be easily peeled off from the hair removal site. This is a characteristic feature.

The A system consists of at least a polymer compound that can easily form a film by changing the PL, and further includes a pH adjuster, a solvent, etc., if necessary. On the other hand, system B has the pH of system A.
Consists of components that change

That is, for example, system A, which is an aqueous solution of a polymer compound that is stable in an acidic aqueous solution, is provided with system B, which is made of an alkaline component, to precipitate a cough polymer compound to form a film of the polymer compound. Furthermore, similar results can be obtained by providing a B system consisting of an acidic component for a polymer compound that is stable in an alkaline aqueous solution.

Preferred examples of the polymer compound in this embodiment include gelatin, casein, glue, albumin, and soybean protein. It is preferable to use these as an alkaline aqueous solution.

In order to keep the A system alkaline, for example, hydroxide,
Alkaline substances such as carbonates, ammonia, and amines are used, and organic acids (eg, citric acid, malic acid, and acetic acid) are used as the acidic substances used in the B system.

In addition, in both embodiment (1) and Li (2), system B is in a liquid state when used only as a solvent, so it is not convenient to use. Therefore, in the present invention, it is preferable to form it into a sheet containing the solvent. . Such a sheet-like molded product may be made of a sol-like sheet material made of sodium polyacrylate, carboxymethyl cellulose, polyvinyl alcohol, polyvinyl methyl ether, butyral resin, etc., or a liquid-absorbing material (gauze, nonwoven fabric, paper, etc.). ) is exemplified.

The depilatory agent of the present invention first applies the A type to the depilatory area, and then
It can be used by installing the B system.

In this way, the A system undergoes phase separation, the polymer compound in the A system becomes poorly soluble, and a film of the polymer compound is formed.

As a result, body hair becomes trapped in the coat,
By peeling off the coating, body hair whose roots have been weakened by the hair removal drug can be beautifully removed.

[Action/Effect]

In the depilatory agent of the present invention, the A system consisting of a dissolved polymer compound easily forms a film through phase separation, and the hair is at least softened by the depilatory drug contained in the depilatory agent. Therefore, unlike physical hair removal using wax, body hair can be softened, and severe pain during hair removal can be avoided. Furthermore, since the coating is peeled off with body hair trapped within the coating, the problems of unpleasant odors and post-processing that occur with creams are eliminated.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples, but these are not intended to limit the present invention.

In addition, % in the text means weight %.

Example 1 A system and B system consisting of the following compositions: A system butyral resin 20% calcium thioglycolate 7% ethyl alcohol
73% B-based carboxymethylcellulose 5% water
95% completed. A
After applying the system to the hair removal site, a flat sheet of system B was placed on the surface to which system A was applied. After 10 minutes, a solidified film was formed that trapped body hair and was easily peeled off.

Example 2 A system and B system consisting of the following components: A system casein 10% ammonia water (28%) 0.5% water 89.5%
B-based citric acid 6% polyvinyl alcohol 20% water
74% were created. A composition was applied to the hair removal site and dried to form a sheet, and the composition was superimposed on the surface to which the A system was applied. After 10 minutes, the solidified film containing drug-treated body hair was easily peeled off and the hair was removed cleanly.

Claims (3)

[Claims] (1) Consisting of a two-component system: a system consisting of a dissolved polymer compound (A system), and a system containing a component that phase-separates the A system and produces a film of a polymer compound (B system), the A system and B
A hair removal agent comprising a hair removal drug in at least one of the systems. (2) The depilatory agent according to claim (1), wherein the component in system B is a poor solvent for the polymer compound in system A. (3) The components in system B are p relative to the polymer compounds in system A.
The hair removal agent according to claim (1), which comprises a component having an H-changing effect.