JPS6360724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pack for skin conditioning and beauty, and more specifically, it does not require drying to form a film, as in conventional jelly packs, and can be applied and removed with a single touch. The present invention relates to an adhesive sheet-like pack agent that can be used to cleanse the skin and exhibit excellent beauty effects. Conventionally, as a pack agent, a pack agent containing a water-soluble polymer such as polyvinyl alcohol and having the ability to form an O/W type emulsion-like or jelly-like film is generally well known. When using this type of face pack, take out only the required amount from a container such as a tube and apply it to the face, etc. After drying, wash your face or remove the dry film to remove dirt and dead skin cells from the skin and release skin-beautifying ingredients. These packs are meant to penetrate the skin and have a beauty effect, but these packs leave your hands dirty when you apply them, take a long time to dry, and can't be easily removed if you have an unexpected visitor during that time. No, you have to reapply it from the beginning after peeling it off, and it is difficult to spread the pack evenly when applying, resulting in uneven thickness of the pack layer, which causes the skin-beautifying ingredients contained in the pack to deteriorate. There were various disadvantages such as the effect was uneven, the film strength of the dry film was not sufficient, and it was difficult to make a uniform film thickness, so the film was torn during peeling and a part of it remained on the skin. . As a result of intensive research in order to improve the above-mentioned drawbacks, the inventors of the present invention found that an oily continuous phase consisting of a polymer compound and an oil component of 30 to 95% by weight, and water particles added to this continuous phase using an emulsifier. According to an adhesive sheet-like pack that contains skin-beautifying ingredients and tackifying ingredients in a water-containing polymer film or sheet made of a water-containing gel that is stable at room temperature and contains 5 to 70% by weight of an emulsified water dispersed phase. It has been found that the above-mentioned drawbacks can be overcome. In other words, the pack of the present invention does not need to be applied to the skin and then dried to form a film, and the pack can be applied simply by applying the sheet-shaped pack to the area to be treated, such as the face.
You don't have to worry about getting your hands dirty at all, and this sheet pack is easy to remove, so even if you have an unexpected visitor while you're doing the pack, you can just take it off temporarily and put it back on when you're done. It has the advantage that it can be easily packed at any time. In addition, since it is pre-formed into a sheet with a uniform thickness, you can expect uniform beauty effects over the entire surface, and the strength of the film is also uniform, so there is no chance of it tearing or leaving part of it on the skin when peeled off. Never. As described above, the adhesive sheet-like pack according to the present invention completely eliminates all the drawbacks of conventional packs. Moreover, since the adhesive sheet-like pack according to the present invention is made of a hydrous polymer, that is, one that contains a predetermined amount of water, it can adhere well to skin surfaces with unevenness such as wrinkles, and the It can be applied easily even if the surface is oily or dry. In particular, the water-containing polymer film or sheet may be a film or a film made of a water-containing gel that is stable at room temperature and contains water in the proportions described above in the form of particles dispersed in an oily continuous phase consisting of a polymer compound and an oil component. Since a sheet is used, the oily continuous phase does not have water or hygroscopic properties, so when applying a pack using such a sheet-like pack agent, the water that constantly evaporates from the skin surface is absorbed. It stays between the layer and the skin, and as a result, the stratum corneum becomes flexible and the pores expand, creating a so-called "steaming effect" that promotes the penetration of skin-beautifying ingredients into the skin and lowers the temperature of the skin. As a result, blood circulation improves and skin metabolism increases, an effect that could not be expected with conventional face packs. As mentioned above, the water-containing polymer film or sheet used in this invention contains water in the form of particles dispersed in an oily continuous phase consisting of various natural or synthetic polymer compounds and an oil component. It is made of a stable hydrogel, but in order to produce a film or sheet made of such a hydrogel, for example, a polymer compound and desired additives are dissolved in an excess amount of an oil component under heating, and then An emulsifier and water are added to this dissolved system to emulsify and disperse water to produce a W/O emulsion containing emulsified water particles in an oily continuous phase consisting of the polymer compound and oil component, and then This emulsion may be spread on a flexible support such as a plastic film and then cooled to room temperature to form a gel. In addition, when obtaining a film or sheet of hydrogel alone without using the above-mentioned support, the above-mentioned emulsion is spread as it is, that is, using a release material instead of the above-mentioned support, and after being spread on it, it is gelated in the same manner as above. , the above-mentioned release material may be removed after gelation. The polymeric compounds used to form the oily continuous phase include, for example, natural and synthetic polyisoprene rubber, butyl rubber, polyisobutylene, ethylene-propylene terpolymer, A-B
Natural and synthetic rubbery polymers such as type single block copolymers, A-B-A type teleblock copolymers, radial teleblock copolymers, multi-block copolymers and/or ethylene-vinyl acetate copolymers, etc. Examples include rubber-like polymers, among which radial teleblock copolymers, A
-B type single block copolymer, A-B-A
Teleblock copolymers of the type elastomers and/or ethylene-vinyl acetate copolymers are preferably used because they provide hydrogels that are flexible and tough and have excellent stress dispersion properties and are very stable at room temperature. Each of the radial teleblock copolymer (elastomer in which A block and B block are bonded in the form of a radial teleblock), A-B type single block copolymer, and A-B-A type teleblock copolymer used here Elastomers (hereinafter referred to as block elastomers) are hard polymers in which the A block is made of a vinyl compound such as styrene or methylstyrene, have a glass transition temperature of 70°C or higher, and have an average molecular weight in the range of about 1,000 to 500,000. Polymers having the following are effective. In addition, the B block is a soft polymer of conjugated diene compounds such as butadiene and isoprene, and its glass transition temperature is -100
Polymers having average molecular weights in the range of about 4,500 to 1,000,000 at temperatures of -30°C are useful. The terminal A block of each of the block elastomers described above comprises about 10 to 65 percent by weight of the block elastomer. Also, ethylene-vinyl acetate copolymer (hereinafter referred to as
EVA) has a vinyl acetate content of 19% by weight.
or melt index is 100 or more (ASTM
law MI value) is valid. The oil components used to form the continuous phase together with the polymer compounds such as the block elastomers mentioned above include animal and vegetable oils such as squalane, olive oil, and lanolin, higher fatty acids such as oleic acid and stearic acid, machine oil, and cylinder oil. oil,
Trans oil, rosin oil, various liquid paraffin, etc. are preferably used, but when these oily substances are heated, paraffin wax with a melting point of 120°C or less, wax-like low molecular weight polyethylene with a melting point of 150°C or less, etc., is added to give an oily form. Mixtures with added substances are also useful as the oil component of the present invention. The amount of the above oil component used is 5 to 120% of the polymer compound.
A range of 100 parts by weight is effective for forming a continuous phase of hydrogel, and the amount of the polymer compound to be used is determined mainly by the relationship between the water content of the final product and the degree of flexibility it should obtain. be done. In the above manufacturing method, the emulsifier used when producing the W/O emulsion is as follows:
Use an emulsifier that stably maintains the form of a W/O emulsion by forming a dispersed phase of countless emulsified water particles in a continuous phase consisting of a polymer compound such as the block elastomer and an oil component. is desirable, and nonionic surfactants are particularly effective as this type of emulsifier, such as polyethylene glycol oleyl ether, polyethylene glycol nonylphenyl ether, polyethylene glycol decyl phenyl ether, sorbitan monolaurate, and the like. As a commercially available product,
For example, the product name Neugen EA manufactured by Daiichi Kogyo Seiyaku Co., Ltd.
Neugen ET, Solgen, etc. are suitable. The amount of the emulsifier used varies depending on the amount of water contained in the final hydrogel, but is generally 1 to 20 parts by weight, preferably 5 to 10 parts by weight, per 100 parts by weight of water. The water content in the hydrous polymer film or sheet used in this invention is preferably in the range of 5 to 70% by weight, preferably 10 to 60% by weight. By impregnating this film or sheet with moisture, it is intended to improve its compatibility with the skin and to obtain the steaming effect described above, but if the moisture content is too low than the above range, the effect will be reduced. If the amount is not sufficient or increases too much, the shape retention will be poor and a so-called sag phenomenon will occur, making it unsuitable for practical use. As the skin-beautifying ingredients used in this invention, any of the various skin-beautifying active substances used in conventional face packs can be used, such as amino acids, proteins, hormones, placenta extracts, phosphatides, tissue extracts, Vitamins, fresh cells, fats, sugars, bleach, anesthetics, analgesics, depilatory agents, etc. can be selected depending on the intended use, and these substances are usually placed in a hydrous polymer film or sheet.
It is preferable to include it in a range of 0.1 to 5% by weight. In addition, the tackifier components used in this invention include rosin and modified rosin, petroleum resin, coumaron indene resin, methyl indene resin, polyterpene resin, polystyrene resin, hydroabiethyl alcohol, polybutene, liquid polyisobutylene, etc. Any of the various compounds used as imparting agents can be used, and they may be contained in the water-containing polymer film or sheet in an amount usually in the range of 10 to 70% by weight. Any method may be used to incorporate the skin-beautifying component and the tackifying component into the hydrous polymer film or sheet. The emulsion may be added to the system at any stage before it is formed into a sheet. The adhesive sheet pack of this invention may contain kaolin, bentonite, clay,
Various fillers such as calcium carbonate, titanium oxide, and zinc oxide; Antioxidants, coloring agents; Antifungal agents such as thymol, boric acid, and parabens; Fragrances; Anti-inflammatory agents such as diphenhydramine hydrochloride and ammonium glycyrrhizinate, etc. Various additives used may be included, and natural fibers such as cotton, rayon, acetate, polyester fibers,
Synthetic fibers such as nylon fibers can also be added as a binder. The adhesive sheet-like pack of the present invention, which is composed of the above-mentioned components, has the following characteristics in terms of ease of handling during storage and use.
A pack agent layer is provided on a flexible support such as cloth, nonwoven fabric, or film, and the surface of this pack agent layer is further covered with a releasable film or paper. It would be very convenient if the mask layer that was peeled off and exposed could be attached to the face or the like.
Further, it is easier to use if the sheet-like material is processed by punching or the like according to the applicable site. In addition, the adhesive sheet-like pack agent of this invention is
In order to prevent contamination during storage, evaporation of volatile substances, etc., which may reduce effectiveness, it is desirable to store the product in an airtight container until use. Next, the present invention will be explained in more detail with reference to Examples. In addition, in the following, parts mean parts by weight. Example 1 100 parts of light liquid paraffin (Small P-55, trade name manufactured by Matsumura Oil Research Institute), EVA (vinyl acetate content 40% by weight, EIvax40, trade name manufactured by DuPont)
20 parts, EVA (vinyl acetate content 28% by weight, Evaflex 210, trade name manufactured by Mitsui Polychemical Co., Ltd.) 20
parts, polyethylene glycol (average molecular weight 400)
A mixture consisting of 20 parts and 80 parts of a tackifier (pharmacopoeial rosin) was heated and dissolved at about 130°C, and to this melt was added 10 parts of an emulsifier (Solgen S-40H, trade name manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and an emulsifier ( After adding 10 parts of Solgen TW80 (trade name manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), add distilled water.
200 parts were added dropwise under stirring to form a W/O emulsion, and 0.5 parts of tocopheryl acetate, 0.5 parts of dipotassium glycyrrhizinate and 0.003 parts of red No. 215 were added dropwise under stirring to form a W/O emulsion.
The emulsion was spread on a 100 μm thick polyethylene film to a thickness of about 1 mm, and then cooled to room temperature to obtain an adhesive sheet-like pack. Example 2 100 parts of liquid paraffin with a viscosity of 170 centipoise (20°C), 70 parts of petroleum resin (Alcon M-90, trade name manufactured by Arakawa Chemical Industries, Ltd.), styrene-butadiene single block elastomer (molecular weight in terms of styrene: approximately 300,000, Approximately 120 parts of a mixture consisting of 60 parts (styrene content (approximately 40%)) and 20 parts of pharmacological calcium carbonate.
After heating and dissolving at ℃, 15 parts of an emulsifier (Emulmin PL-40, trade name manufactured by Mitsui Kasei Industries, Ltd.) was added to this melt, and then 300 parts of distilled water in which 0.5 part of allantoin and 0.5 part of dipotassium glycyrrhizinate were dissolved was added. The mixture was dropped under stirring to form a W/O emulsion, spread on a nonwoven fabric to a thickness of about 1 mm, and then cooled to room temperature to obtain an adhesive sheet-like pack. Example 3 Light liquid paraffin (Sumoil P-55, already mentioned)
120 parts, styrene-isoprene-styrene teleblock elastomer (Califlex TR-
1107, product name manufactured by Ciel Chemical Co., Ltd.) 60 parts, petroleum-based resin (Alcon P-70, product name manufactured by Arakawa Chemical Co., Ltd.) 50 parts
1 part, 200 parts of calcium carbonate, 1 part of tocopherol, and 0.003 parts of Blue No. 1.
After heating and dissolving at 110° C., 15 parts of sorbitan monooleate was added to this melt, and 200 parts of distilled water was added dropwise with stirring to form a W/O emulsion.
This emulsion was spread on a 100μ polyurethane film to a thickness of about 1 mm, and then cooled to room temperature to obtain an adhesive sheet-like pack. Example 4 100 parts of liquid paraffin with a viscosity of 170 centipoise (20°C), 30 parts of squalane, 50 parts of styrene-butadiene radial terresblock elastomer (Solprene T-431, trade name manufactured by Asahi Kasei Corporation), and polyterpene resin (YS Resin-Px) About 150 parts of a mixture consisting of 100 parts of #800 (product name manufactured by Yasushi Oil Industries)
After heating and dissolving at ℃ and adding 10 parts of sorbitan sesquioleate to this melt, 200 parts of distilled water was added dropwise with stirring to form a W/O emulsion.
Furthermore, 0.5 parts each of tocopherol acetate and dipotassium glycyrrhizinate were added. This emulsion was spread on a 100μ polyurethane film to a thickness of about 1 mm, and then cooled to room temperature to obtain an adhesive sheet-like pack. The sheet-like packs obtained in Examples 1 to 4 were examined for each item shown in the following table, and the results were as shown in the table. In addition, as comparative examples in the same table, 8 parts of polyvinyl alcohol, 4 parts of polyethylene glycol, 4 parts of glycerin, 80 parts of water, 8 parts of ethyl alcohol,
The results obtained by conducting a similar test using a commercially available tube-filled jelly pack containing 1 part of fragrance, 0.5 part of preservative, and 0.1 part of vitamin E are also listed. In addition, to explain the test method in detail, a sheet-like pack is cut into a shape that can be applied to the face, and the required notches corresponding to the eyes, nose, and mouth and several notches on the periphery are cut into it. We created test samples using the above-mentioned method of pairwise comparison with commercially available tube packs, and conducted a practical test in the form of a questionnaire on the items shown in the table below, targeting 20 in-house healthy women who regularly use packs. The average value or average opinion of 20 people is shown in the table. 【table】

Claims (1)

[Scope of Claims] 1. 30 to 95% by weight of an oily continuous phase consisting of a polymer compound and an oil component, and 5 to 70% by weight of an aqueous dispersed phase in which water particles are emulsified with an emulsifier in this continuous phase. An adhesive sheet-like pack comprising a skin-beautifying component and a tackifying component contained in a water-containing polymer film or sheet made of a water-containing gel that is stable at room temperature. 2. As the polymer compound, an elastomer selected from a radial teleblock copolymer, an A-B type single block copolymer, and an A-B-A type teleblock copolymer and/or an ethylene-vinyl acetate copolymer was used. An adhesive sheet-like pack according to claim 1.