JPS6121202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a skin liquid composition used as cosmetics, quasi-drugs, external medicines, etc. More specifically, by containing soluble nylon as a film-forming agent, This invention relates to a release film type skin composition that forms a thin film of soluble nylon.

Conventionally, various resin emulsions such as vinyl acetate resin emulsions, or polymeric substances such as polyvinyl alcohol and polyvinylpyrrolidone have been used as cosmetics, quasi-drugs, and external medicines, such as peel-off eyeliners and facial packs. Products that take advantage of the film properties of this film are widely used. These products are used by forming a film of the polymeric substance on the skin surface upon application, and this film is removed from the skin upon completion of application. However, many conventional skin compositions of this type have one or more of the following problems.

(1) Does not form a transparent film. (For example, when using only alcohol, the mask becomes cloudy.) (2) Even after the film is formed, it remains sticky. (Especially when water-soluble polymers are used.) (3) The adhesion of the film to the skin is weak. In particular, when a water-soluble polymer is used, the film-forming ability decreases due to the effects of sweat, moisture, and the like.

(4) Gives a strange feeling to the skin during film formation and adhesion.
In addition, it often causes a feeling of tightness and does not follow the expansion and contraction of the skin.

(5) Peelability from the skin surface is poor regardless of whether or not a plasticizer is added. (Some water-insoluble polymers exhibit very good releasability from surfaces such as metal, paper, and glass, but have poor releasability from the skin surface.) (6) Even if the releasability is high, the film remains In many cases, the strength is low and the film is inflexible, so it does not come off as a single film and becomes tattered or broken into pieces. For this reason, it is difficult to peel off the coating easily and in good condition.

(7) The adhesion is too strong and causes pain when the film is removed. This is especially a problem when applied to hairy areas.

(8) Due to the influence of the solvent that dissolves the film-forming agent, drying time on the skin surface is long, and a film is not formed quickly. (In particular, water-soluble polymers use water-based solvents, so they have poor drying properties.) In any case, conventional skin compositions do not form a transparent film or cause the film to adhere to the skin. There is no product that has both the adhesion and peelability of the film, and it also has the disadvantages of feeling sticky, feels strange to the skin, is painful when removed, and does not come off as a single film. Ta.

The present inventors have conducted various studies to develop a skin composition that has good functions and eliminates the above-mentioned drawbacks, and as a result, we have used soluble nylon as a film-forming agent and applied it to a volatile solvent such as ethanol. 5
When the liquid skin composition obtained by dissolving the skin composition in a proportion of ~20% by weight is applied, a transparent film is quickly formed and the adhesion of this film to the skin is extremely high. Furthermore, this film itself is flexible and has appropriate strength, reliably follows the expansion and contraction of the skin, and therefore does not peel off easily. Despite its good quality, when this film is peeled off and removed, it becomes a thin layer that can be easily and painlessly removed, and it also feels very good when used, and does not cause stickiness or stickiness. It does not cause a crisp feeling or a strange feeling when applied, and is easy to use and can be suitably applied to a wide range of fields such as cosmetics, quasi-drugs, and external medicines. It was discovered that only when nylon is used, its original function can be exhibited and the drawbacks (1) to (8) above can be satisfactorily and reliably overcome, leading to the present invention.

That is, the present invention provides a liquid skin composition characterized in that it contains soluble nylon as a film-forming agent dissolved in a volatile solvent in an amount of 5 to 20% by weight of the total composition.

The present invention will be explained in detail below.

The present invention provides a peel-off film type eyeliner, a pack,
It is used in cosmetics, quasi-drugs, external medicines (excluding external anti-inflammatory analgesics), etc., such as perfumes, antiperspirants, hot ties, skin disinfectants, etc., depending on the type and use of these products. Appropriate ingredients and active ingredients are blended, and these ingredients include methanol, ethanol, water-ethanol, propylene glycol,
It is mixed with one or more volatile solvents that do not cause any trouble to the skin, such as isopropyl alcohol.

In the present invention, soluble nylon is dissolved in a volatile solvent containing active ingredients suitable for the purpose. In this case, the soluble nylon is
Cocondensates and copolymers of nylon salt and caprolactam, 6-nylon, modified nylon made by reacting 6,6-nylon with formaldehyde and alcohol, and the like are used. Further, the blending amount of this soluble nylon is 5 to 20% by weight of the total weight, and by setting the blending amount within this range, a thin film with excellent properties is formed when applied, and its effects are well exhibited. On the other hand, if the blending amount is less than 5% by weight, even if a film is formed, the film strength is weak and becomes crumbly when peeled off, making it impossible to peel off as a continuous and uniform film. is not achieved. In addition, if the blending amount is more than 20%, the viscosity of the resulting composition increases, making it sticky and unpleasant when applied to the skin.In addition, the evaporation of volatile solvents is suppressed, resulting in a sticky feeling. will continue. Furthermore, it is not preferable to add more than 20%, as the resulting film becomes thick and gives a sticky and unpleasant feeling.

As described above, the dermatological composition of the present invention is formed by dissolving soluble nylon in a volatile solvent, and can be prepared as a liquid solution or in combination with a commonly used propellant such as Freon. It is prepared into an aerosol dosage form by blending the amounts.

Therefore, this skin composition is used by applying or spraying it on the skin surface, etc., and when this composition adheres to the skin surface, etc.,
As the volatile solvent in the composition evaporates, a thin film of the above-mentioned soluble nylon is formed on the skin surface, etc., and exhibits the desired function.

That is, a skin composition using soluble nylon as the main film-forming substance forms a completely transparent thin film. Therefore, the presence of the formed film is not noticeable when applied, and since the film is transparent, when applied to eyeshadow, eyeliner, etc., for example, there is no inconvenience in which the intended color appears to change due to the formation of the film. Forms a film with the desired color. In addition, the soluble nylon thin film has good film adhesion to the skin surface, etc., and the thin film itself is flexible, has appropriate film strength, and has elasticity with the movement of the skin. In addition to not easily peeling off from the skin, the film is water resistant, and the film will not fall off even if you sweat or take a bath, unless you apply considerable physical force such as rubbing or scratching. Therefore, the formed film is well retained and adhered to the skin surface etc. until it is peeled off at the end of application.

Furthermore, the skin composition according to the present invention has a short film drying time, forms a film quickly, and has no sticky feeling after the film dries, and also has no sticky feeling or strange feeling when applied. Furthermore, as mentioned above, since the film is flexible, it follows the expansion and contraction of the skin well, and the film does not become crack-like. In addition, since a thin film is formed, the physiological functions of the skin, such as skin respiration, are not inhibited, and it can be used without problems with skin problems. It is excellent.

Furthermore, the skin composition of the present invention has excellent adhesion of the film formed as described above to the skin surface, etc.
Despite its very good retention properties, it has very good film removability. That is, when this coating is peeled off and removed, it has the characteristic that it comes off as a thin sheet and can be easily peeled off at any time. In addition to having such excellent peelability, when the film is removed from the skin,
It does not cause pain or other pain and can be suitably applied to hairy areas. Furthermore, in this skin composition, the effects of the active ingredients contained in the skin composition last for a long time due to the formation of a soluble nylon film.

As explained above, the present invention uses soluble nylon as a film-forming agent dissolved in a volatile solvent at a ratio of 5 to 20% by weight of the total, so that it can be applied to two surfaces of the skin for a short period of time. When dried, a thin transparent film is formed, and the film has good adhesion to the skin, etc., and can be easily peeled off as a single thin film at any time. In addition to having good properties in both properties and peelability, it has excellent usability and ease of use, and is suitable for use as a peelable dosage form in many fields such as cosmetics, quasi-drugs, and topical pharmaceuticals. Ru.

The present invention will be specifically explained below with reference to Examples.

[Example 1] A peelable film type antiperspirant having the following formulation was prepared by a conventional method.

Aluminum chlorhydrol 30.0% by weight (50% aqueous solution) Fragrance 0.3〃 Soluble nylon (Toray Industries, Inc. CM-9000) 10.0〃Ethanol 59.7〃 100.0〃 This antiperspirant can be prepared stably and has a refreshing taste. It had a good feeling of use. In addition, the antiperspirant effect was long-lasting, and when the formed film was peeled off, it was peeled off as a single soft film.

[Example 2] A release film type pack having the following formulation was manufactured by a conventional method.

Soluble nylon (CM-9000) 15.0% by weight Water 10.0 Fragrance 0.3 Ethanol 74.7 100.0 This pack became a good transparent solution and dried in just 5 minutes after application. The feeling of use was very good, and the pack did not deform even if I talked while wearing it, and when I peeled it off, it turned into a single thin film and could be peeled off.

[Example 3] A release film-type hot tie having the following formulation was produced by a conventional method.

Soluble nylon (CM-9000) 20.0% by weight Ethanol 80.0〃 100.0〃 This hot tie was stable, had excellent quick-drying properties, excellent film elasticity, and did not cause any swelling during use. Furthermore, the film had good adhesion and could be easily peeled off as a single film.

[Example 4] A peelable film type perfume having the following formulation was produced by a conventional method.

Soluble nylon (CM-8000 manufactured by Toray Industries, Inc.) 10.0% by weight Perfume 10.0〃Ethanol 80.0〃100.0〃 This perfume had a long-lasting fragrance and could be peeled off at any time, making it easy to use.

[Example 5] A peelable film type aerosol disinfectant having the following formulation was produced by a conventional method.

Soluble nylon (CM-8000) 5.0% by weight Tetramethylthiuram disulfide 0.02〃 Polyethylene glycol 1500 0.5〃 Dichlorodifluoromethane 30.0〃 Trichlorofluoromethane 45.0〃Ethanol Balance 100.0〃 This disinfectant has a long-lasting effect of its active ingredients. In addition, the film had excellent elasticity, did not peel off due to sweat, etc., and was well retained on the applied skin surface, and when peeled off, it became a single thin layer and could be easily peeled off. .

Claims (1)

[Claims] 1 Soluble nylon as a film forming agent
A liquid skin composition characterized in that it is dissolved in a volatile solvent in a proportion of ~20% by weight.