JP2024049274A - Skin preparations - Google Patents

Abstract

[Problem] To provide a kit for obtaining an external skin preparation that has high film strength and is easy to peel off, and an external skin preparation. [Solution] The present invention is a kit for obtaining an external skin preparation, characterized in that the first agent is a composition containing tamarind gum, water, and a filler, and the second agent is a composition containing a polyhydric alcohol. The present invention also provides an external skin preparation that contains tamarind gum, water, a filler, and a polyhydric alcohol. [Selected Figures] None

Description

The present invention relates to a kit for obtaining a peel-off type topical skin preparation, and to a topical skin preparation containing tamarind gum and a filler.

Nowadays, a variety of packs are used for skin care. Packs generally include sheet masks made of nonwoven fabric or biocellulose that are impregnated with active ingredients or moisturizing ingredients; packs in which a paste, gel, or cream is applied to the skin and then washed off; and peel-off packs in which a paste or gel is applied to the skin, dried or formed into a film, and then peeled off.

Known peel-off packs include those that use polyvinyl alcohol or tamarind gum to form a film. For packs using tamarind gum, a method has been proposed in which a composition that gels with polyglycerin is used (Patent Document 1). However, the resulting gel does not have sufficient film strength and is difficult to peel off.

JP 2012-254940 A

The inventors therefore carried out various investigations with the aim of providing a topical skin preparation that contains tamarind gum, has high film strength, and is easy to peel off.

As a result, the inventors have succeeded in developing a skin preparation for external use that has excellent film strength and is easy to peel off by using tamarind gum, water, a filler, and a polyhydric alcohol, thus completing the present invention.

That is, the present invention is as follows.
<1> A kit for obtaining a skin topical preparation, characterized in that a first agent is a composition containing tamarind gum, water, and a filler, and a second agent is a composition containing a polyhydric alcohol.
<2> The kit according to <1>, characterized in that the filler is at least one selected from the group consisting of silica, titanium oxide, zinc oxide, iron oxide, talc, and hydrophobized starch.
<3> The kit described in <1>, characterized in that either the first agent or the second agent contains an acid.
<4> The kit described in <1>, characterized in that either the first agent or the second agent contains a carbon dioxide gas generating substance.
<5> The kit described in <1>, characterized in that the content of filler in the first agent is 0.1 mass% or more.
<6> The kit described in <1>, characterized in that the second agent contains water.
<7> The kit described in <1>, characterized in that the second agent contains an acid.
<8> The kit described in <1>, characterized in that the first agent contains a carbon dioxide gas generating substance.
<9> A skin preparation for external use, comprising tamarind gum, water, a filler and a polyhydric alcohol.
<10> The topical skin preparation according to <9>, wherein the filler is at least one selected from the group consisting of silica, titanium oxide, zinc oxide, iron oxide, talc, and hydrophobized starch.
<11> The topical skin preparation according to <9>, which is in the form of a gel.
<12> The topical skin preparation according to <11>, characterized in that the film strength is 1.5 N or more.
<13> A skin preparation for external use, comprising tamarind gum, water, a filler, a polyhydric alcohol, an acid, and a carbon dioxide generating substance.
<14> The topical skin preparation according to <13>, wherein the filler is at least one selected from the group consisting of silica, titanium oxide, zinc oxide, iron oxide, talc, and hydrophobized starch.
<15> The topical skin preparation according to <13>, which is in the form of a gel.
<16> The topical skin preparation according to <15>, characterized in that the film strength is 1.5 N or more.

According to the present invention, by including a filler and a polyhydric alcohol together with tamarind gum, it is possible to obtain a skin topical preparation that has excellent film strength, is easy to peel off, and has excellent moisturizing effects. Furthermore, according to the present invention, by forming the kit of the present invention, it is possible to obtain a skin topical preparation that is easy to use because it is easy to mix at the time of use.

The topical skin preparation of the present invention will be described in detail below. Note that the present invention is not limited to the embodiments shown below, and can be modified within the scope of what a person skilled in the art can imagine, including other embodiments, additions, modifications, deletions, etc., and any embodiment is within the scope of the present invention as long as it achieves the functions and effects of the present invention.

<Tamarind gum>
Tamarind gum is a polysaccharide obtained from the endosperm of tamarind seeds, and is also called tamarind seed gum. The content of tamarind gum in the present invention is not particularly limited, but is preferably 0.01 to 40% by mass, more preferably 0.05 to 35% by mass, and particularly preferably 0.1 to 30% by mass in the composition of the first agent. Also, the content of tamarind gum in the external skin preparation is preferably 0.001 to 30% by mass, more preferably 0.005 to 25% by mass, and particularly preferably 0.01 to 20% by mass.

<Water>
The water used in the present invention can be water that can be used in cosmetics, topical medicines, quasi-drugs, etc., and is preferably purified water, distilled water, membrane-filtered water, or ion-exchanged water. In the present invention, the content of water is not particularly limited, and it can be blended in either the first or second agent, but it is preferably blended in the first agent. The amount of water in the first agent is preferably 1% by mass or more in the composition of the first agent, more preferably 5% by mass or more, and particularly preferably 10% by mass or more. When water is blended in the second agent, it is preferably 0.1% by mass or more in the composition of the second agent, more preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. In addition, it is preferably 0.1% by mass or more in the skin topical agent, more preferably 1 to 85% by mass, and particularly preferably 10 to 80% by mass.

<Filler>
The skin external preparation of the present invention is characterized by containing a filler.By containing a filler, the obtained composition becomes a gel with excellent film strength, and is easy to peel off.The filler used in the present invention can be, for example, metal oxides such as silica, titanium oxide, zinc oxide, iron oxide, talc, mica, sericite, boron nitride, clay, and hydrophobized starch such as corn starch octenyl succinate aluminum, and preferably, silica, titanium oxide, zinc oxide, iron oxide, talc, and corn starch octenyl succinate aluminum.

A powder can be used as the filler in the present invention. There is no particular restriction on the average particle size of the filler that can be used in the present invention, but for example, 0.0001 μm or more and 100 μm or less is preferable, 0.0005 μm or more and 70 μm or less is particularly preferable, and from the viewpoint of dispersibility and quality stability, 0.001 μm or more and 50 μm or less is particularly preferable. The average particle size of the filler can be measured, for example, using a laser diffraction method.

The content of the filler in the present invention is not particularly limited, but is preferably 0.01 to 40% by mass in the composition of the first agent, more preferably 0.05 to 35% by mass, and particularly preferably 0.1 to 30% by mass. Also, in the topical skin preparation, it is preferably 0.001 to 30% by mass, more preferably 0.005 to 25% by mass, and particularly preferably 0.01 to 20% by mass. Note that in the present invention, when two or more types of filler are blended, the content is the total amount.

<Polyhydric alcohol>
The skin topical preparation of the present invention contains a polyhydric alcohol. The polyhydric alcohol used in the present invention is not particularly limited as long as it has two or more hydroxy groups in one molecule and can be used in ordinary cosmetics, topical medicines, quasi-drugs, etc., and examples thereof include polyglycerols such as glycerin, diglycerin, triglycerin, and tetraglycerin, sugar alcohols such as ethylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol, 1,3-propanediol, erythritol, maltitol, mannitol, sorbitol, and xylitol, polyglycerol derivatives, and sugars such as sucrose and trehalose. From the viewpoints of storage stability, production costs, and mitigation of irritation to the skin during use, it is preferable to use at least one of glycerin, diglycerin, 1,3-butylene glycol, 1,4-butylene glycol, dipropylene glycol, and polyethylene glycol. One or more types of polyhydric alcohols can be used.

In the present invention, the content of the polyhydric alcohol is not particularly limited, and it can be blended in either the first or second agent, but it is preferably blended in the second agent, and particularly preferably blended in either the first or second agent. The polyhydric alcohol is preferably 10% by mass or more in the composition of the second agent, more preferably 20% by mass or more, and particularly preferably 30 to 99% by mass. When the polyhydric alcohol is blended in the first agent, it is preferably 1% by mass or more in the composition of the first agent, more preferably 3 to 50% by mass, and particularly preferably 5 to 30% by mass. Furthermore, the content of the polyhydric alcohol in the skin topical preparation may be 5% by mass or more, preferably 10 to 90% by mass, more preferably 20 to 80% by mass or more, and particularly preferably 30 to 70% by mass. When two or more types of polyhydric alcohol are blended, the total amount is the total amount.

<Acid>
The skin external preparation of the present invention preferably contains an acid. The acid used in the present invention may be either an organic acid or an inorganic acid, and one or more of these may be used.

Examples of organic acids include straight-chain fatty acids such as formic acid, acetic acid, propionic acid, butyric acid, and valeric acid, or their salts; dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, fumaric acid, maleic acid, phthalic acid, isophthalic acid, and terephthalic acid, or their salts; acidic amino acids such as glutamic acid and aspartic acid, or their salts; oxyacids such as glycolic acid, malic acid, tartaric acid, citric acid, lactic acid, hydroxyacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid, salicylic acid, gallic acid, tropic acid, ascorbic acid, and gluconic acid, or their salts; and examples of inorganic acids include inorganic acids such as phosphoric acid and sulfurous acid, or their salts. One or more of these can be used. Among these, from the viewpoints of safety and solubility in the second agent, citric acid or its salts, ascorbic acid or its salts, malic acid or its salts, and succinic acid or its salts are preferred, with citric acid or its salts and ascorbic acid or its salts being more preferred.

When an acid is incorporated into the topical skin preparation of the present invention, its content in the first and/or second agent composition is preferably 0.01 to 40% by mass, more preferably 0.05 to 35% by mass, and particularly preferably 0.1 to 30% by mass. In addition, its content in the foaming topical skin preparation is preferably 0.001 to 30% by mass, more preferably 0.005 to 25% by mass, and particularly preferably 0.01 to 20% by mass.

When an acid is added to a kit for obtaining the topical skin preparation of the present invention, it may be added to at least one of the first and second agents, but it is preferable to add it to the second agent from the viewpoint of the stability of the composition.

<Carbon dioxide generating substances>
The skin external preparation of the present invention preferably contains a carbon dioxide gas generating substance. As the carbon dioxide gas generating substance used in the present invention, various substances can be used without any particular limitation. In addition, the carbon dioxide gas generating substance used is preferably in a solid form, and more preferably in a granular, fine granular or powder form from the viewpoint of solubility in water or a moisturizing agent.

Examples of carbon dioxide generating substances include carbonates such as sodium carbonate, calcium carbonate, potassium carbonate, magnesium carbonate, and sodium sesquicarbonate, and bicarbonates such as ammonium bicarbonate, potassium bicarbonate, sodium bicarbonate, lithium bicarbonate, cesium bicarbonate, magnesium bicarbonate, and calcium bicarbonate, and one or more of these may be used. Of these, bicarbonates are preferably used, and sodium bicarbonate is more preferred because it can react with acid to achieve a suitable foaming power.

When a carbon dioxide gas generating substance is blended in the topical skin preparation of the present invention, its content in the first and/or second agent composition is preferably 0.05 to 40% by mass, more preferably 0.1 to 35% by mass, and particularly preferably 0.5 to 30% by mass. In addition, its content in the foaming topical skin preparation is preferably 0.01 to 30% by mass, more preferably 0.05 to 25% by mass, and particularly preferably 0.1 to 20% by mass.

When a carbon dioxide gas generating substance is incorporated into a kit for obtaining the topical skin preparation of the present invention, it may be incorporated into at least one of the first and second agents, but it is preferable to incorporate it into the first agent from the viewpoint of the stability of the composition.

<Other ingredients>
In addition to the above-mentioned components, the skin external preparation of the present invention may contain other components as necessary. Examples of other components include one or more of the components usually used in skin external preparations, such as thickeners, gelling agents other than tamarind gum, moisturizing agents other than polyhydric alcohols, dispersants, plasticizers, preservatives, fragrances, surfactants such as anionic surfactants, amphoteric surfactants, nonionic surfactants, and cationic surfactants, active ingredients such as deodorants, chelating agents, antioxidants, antibacterial agents, antibacterial and antifungal agents, anti-inflammatory agents, and whitening agents, cosmetic ingredients and medicinal ingredients such as animal extracts and plant extracts, and the like.

When an active ingredient is blended into the topical skin preparation of the present invention, the ingredient is not particularly limited, and drugs and plants used in cosmetics, topical medicines, quasi-drugs, etc. can be used according to the purpose. Representative examples include, for example, glycyrrhizinic acid and its derivatives and their salts, glycyrrhetinic acid and its derivatives and their salts, anti-inflammatory agents such as allantoin and guaiazulene, ascorbic acid and its derivatives and their salts, cysteine and its derivatives and its salts, glabridin, glabrene, liquiritin, isoliquiritin, placenta, hydroquinone and its derivatives, resorcin and its derivatives, whitening agents such as glutathione, antiseborrheic agents such as sulfur and thianthrol, bactericides such as salicylic acid and Phellodendron bark extract, tocopherol and its derivatives, plant ingredients such as licorice, aloe, and tea leaves, and hormones such as estradiol. When using plant ingredients, the whole plant, leaves (leaf blades, petioles, etc.), fruits (mature, immature, etc.), seeds, flowers (petals, ovaries, etc.), stems, rhizomes, roots, tubers, etc. can be used as they are, cut, crushed, pulverized, squeezed, extracted, or processed in this manner and then dried or powdered for use. The active ingredient used in the present invention can be used in either the first or second agent.

When an extract is used in the present invention, examples of the solvent used for extraction include organic solvents such as water, methanol, ethanol, propanol, butanol, ethylene glycol, propylene glycol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, hexylene glycol, glycerin, methyl acetate, ethyl acetate, isopropyl acetate, ethyl ether, and acetone. These can be used alone or in combination of two or more. From the standpoint of safety, it is preferable to use water, ethanol, 1,3-butylene glycol, or a mixture of these, which are harmless to the human body, as the extraction solvent. Extraction may be performed at or below the boiling point of the extraction solvent, and the extraction time can be changed appropriately depending on the extraction temperature.

When a thickener is blended into the topical skin preparation of the present invention, the thickener that can be used is not particularly limited as long as it is a water-soluble component that can be used in cosmetics, topical medicines, quasi-drugs, etc., and synthetic polymers, semi-synthetic polymers, natural polymers, clay minerals, etc. can be used. The thickener can be used in either the first or second agent, but it is preferable to use it in the first agent.

Synthetic polymers include hydrophilic synthetic polymers such as carboxyvinyl polymers, polyvinyl alcohol, acrylic acid/alkyl methacrylate copolymers, acrylates/alkyl acrylate crosspolymers, polyacrylic acid, polyacrylamide, polyalkylacrylamide/polyacrylamide copolymers, carboxymethyl cellulose, and cationic cellulose.

Examples of semi-synthetic polymers include cellulose derivatives such as carboxymethylcellulose or its salts, methylcellulose, ethylcellulose, propylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, and sulfonated cellulose derivatives. Other semi-synthetic polymers include propylene glycol alginate, ethylene glycol alginate, and dextrin fatty acid esters.

Natural polymers include polysaccharides and their derivatives, such as xanthan gum, succinoglycan, carrageenan, guar gum, locust bean gum, celluloses, galactan, gum arabic, tragacanth gum, agar, agarose, mannan, curdlan, alginic acid or its salts, gum arabic, pectin, quince seed, starch, algae colloid, chondroitin sulfate or its salts, chitosan and its derivatives, etc. Other natural polymers include nucleic acids or their salts, ribonucleic acids or their salts, water-soluble proteins such as casein, collagen, gelatin, albumin, fibroin, elastin, keratin, and sericin, mucopolysaccharides such as hyaluronic acid or its salts, and chondroitin sulfate, etc.

Clay minerals include laponite, bentonite, smectite kaolinite, montmorillonite, etc.

Among the above thickeners, it is preferable to use those with high solubility or dispersibility, as this allows the thickener to be dissolved or dispersed uniformly without forming lumps, and also reduces the rough feeling on the skin caused by undissolved or undispersed components.

Examples of such thickeners include carboxyvinyl polymers, carboxymethylcellulose or its salts, polyvinyl alcohol, sodium polyacrylate, acrylic acid/alkyl methacrylate copolymers, xanthan gum, succinoglycan, carrageenan, guar gum, locust bean gum, celluloses, galactan, gum arabic, tragacanth gum, agar, mannan, curdlan, alginic acid or its salts, collagen, gelatin, albumin, etc., and it is preferable to use carboxymethylcellulose or its salts, xanthan gum, carrageenan, and albumin. One or more of the above thickeners can be used.

When a surfactant is added to the skin topical preparation of the present invention, examples of the surfactant that can be used include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Both synthetic and natural surfactants can be used as the surfactant, but natural surfactants are preferred from the viewpoint of safety to the skin. The term "natural surfactant" as used herein refers to a substance that has a surface active effect, mainly derived from animals or plants, and specific examples include phospholipids such as lecithin, glycolipids, lanolin, cholesterol, saponin, sphingolipids such as ceramide, pectin, glycyrrhizinate, bile acid, plant-extracted amino acid surfactants, etc. Among these, it is preferable to contain an extract containing phospholipids, saponin, sphingolipids, pectin, and glycyrrhizinate, and it is particularly preferable to contain an extract containing saponin. As the extract containing saponin, it is preferable to use an extract derived from a plant. Examples of plants containing saponin include soybeans, adzuki beans, kidney beans, spinach, sugar beets, grapes, bellflowers, licorice, Senega, Quillaja, Sapindus mukorossi, soapwort, ginseng, loofah, tea seeds, Sophora japonica, plants of the lily family, plants of the Dioscorea family, Anemone arbutifolia, and Bakumondou. In the present invention, it is preferable that the extract containing saponin contains an extract of one or more plants selected from soybeans, adzuki beans, licorice, Sapindus mukorossi, and loofah, and it is particularly preferable that the extract contains Sapindus mukorossi.

<Kit for obtaining topical skin preparation>
The topical skin preparation of the present invention is characterized in that it is a kit consisting of a first agent being a composition containing tamarind gum, water, and a filler, and a second agent being a composition containing a polyhydric alcohol. The kit of the present invention is preferably a kit for obtaining a topical skin preparation that contains an acid and a carbon dioxide gas generating substance and generates carbon dioxide gas by mixing them. When the acid and the carbon dioxide gas generating substance are blended in the kit for obtaining the topical skin preparation of the present invention, it is preferable that the acid and the carbon dioxide gas generating substance are blended in separate agents, and from the viewpoint of improving the stability of the composition, it is preferable that the carbon dioxide gas generating substance is blended in the first agent and the acid is blended in the second agent.

The composition of the first agent constituting the kit of the present invention is preferably a viscous composition having a high viscosity. Specifically, the viscosity at 25°C is preferably 5,000 mPa·s or more, more preferably 6,000 mPa·s or more, particularly preferably 7,000 mPa·s or more, and particularly preferably 10,000 mPa·s or more. In addition, from the viewpoint of handling, particularly from the viewpoint of ease of mixing and ease of application after mixing, the viscosity is preferably 100,000 mPa·s or less, more preferably 70,000 mPa·s, particularly preferably 50,000 or less, and particularly preferably 45,000 mPa·s or less.

The composition of the second agent constituting the kit of the present invention preferably has a low viscosity. Specifically, the viscosity at 25°C is preferably 10,000 mPa·s or less, more preferably 5,000 mPa·s or less, and particularly preferably 3,000 mPa·s or less. The composition of the second agent constituting the kit of the present invention is preferably a liquid composition, and if it contains a thickener, it is preferably 2% by mass or less, and more preferably it is substantially free of a thickener. The viscosity of the topical skin preparation of the present invention (including the first agent and the second agent) can be measured, for example, with a B-type viscometer (Brookfield rotational viscometer, temperature: 25°C, rotation speed: 4 to 20 rpm).

When using the kit of the present invention to obtain a skin topical preparation, the first agent and the second agent are mixed in appropriate amounts in a container. The first agent and the second agent are preferably mixed in a ratio of 1:0.1 to 1:30, and more preferably in a ratio of 1:0.5 to 1:10.

The method for preserving the composition constituting the kit of the present invention can be the same as the method for preserving cosmetics, topical medicines, quasi-drugs, etc., and is not particularly limited. The shape of the storage container used can be appropriately selected depending on the purpose, and examples of the shape include cup-shaped, tube-shaped, bag-shaped, bottle-shaped, stick-shaped, pump-shaped, jar-shaped, canned, etc. In addition, the material constituting the storage container can be, for example, plastic, glass, aluminum, paper, various polymers, etc., which can be used alone or in combination of two or more types, but is not limited to these.

Specific examples of containers that are preferable in terms of airtightness, storage stability of the contents, manufacturing costs, etc. include aluminum sticks and aluminum bags whose inner surface is laminated with polyethylene terephthalate, stand-up pouches with zippers, and polyethylene terephthalate storage containers whose lids are heat-sealed with aluminum film whose inner surface is laminated with polyethylene terephthalate, etc.

<External skin preparations>
The skin topical preparation of the present invention is characterized by containing tamarind gum, water, a filler, and a polyhydric alcohol. The skin topical preparation of the present invention is characterized by being applied to the skin after mixing the first agent and the second agent, and gelling by being left to stand for a certain period of time. The skin topical preparation of the present invention can be obtained, for example, by mixing a composition containing tamarind gum, water, and a filler with a composition containing a polyhydric alcohol. The skin topical preparation of the present invention becomes a gel with excellent film strength and is easy to peel off, making it excellent for use as a pack agent. In particular, the skin topical preparation of the present invention is suitable for use as a pack agent that generates carbon dioxide gas.

The topical skin preparation of the present invention has excellent film strength after gelation. In the present invention, the film strength can be determined, for example, by using a digital force gauge (ZP-500N, manufactured by Imada Co., Ltd.) to measure the force required to break a gel composition that has been uniformly spread to a radius of 52 mm and a thickness of 7 mm and solidified. The film strength of the topical skin preparation of the present invention is preferably 1.45 N or more, more preferably 1.5 N or more, particularly preferably 1.55 N or more, and especially preferably 1.6 N or more.

<Uses of topical skin preparations>
The topical skin preparation of the present invention has the effects of whitening, improving skin quality, improving freckles, rejuvenating the skin, tightening the skin, spot reducing, cleansing the skin, conditioning the skin, smoothing the skin texture, keeping the skin healthy, preventing rough skin, tightening the skin, moisturizing the skin, replenishing and maintaining the skin's moisture and oil content, maintaining the skin's flexibility, protecting the skin, preventing the skin from drying out, softening the skin, making the skin firm, making the skin shiny, smoothing the skin, preventing age spots and freckles caused by sunburn, and reducing fine wrinkles caused by dryness. The present invention can be suitably used not only in cosmetics intended to prevent skin from standing up, but also in cosmetics, quasi-drugs, medicines, etc., intended to prevent rough skin, chapped skin, heat rash, chilblains, cracks, chapped skin, acne, oily skin, razor burn, sunburn spots and freckles, prevent hot flashes after sunburn and snowburn, tighten skin, cleanse skin, condition skin, keep skin healthy, moisturize skin, protect skin, prevent skin dryness, etc. The skin topical agent of the present invention is preferably used as cosmetics and quasi-drugs, and more preferably used as cosmetics and medicinal cosmetics such as emulsions, creams, packs, peeling agents, etc. Among them, the use as packs is particularly preferred, since it is easy to obtain a high skin condition improvement effect in a short time with a good feeling of use.

When the topical skin preparation obtained using the kit of the present invention is used as a pack, it is sufficient to apply it to a thickness of 0.2 mm or more, preferably 0.5 mm or more, so as to cover the desired area. By applying it to a thickness of 0.1 mm or more, it is possible to obtain a skin condition improving effect. The application time is sufficient to be 1 minute or more, preferably 3 minutes or more, and more preferably 5 minutes or more. After application, it gels and can be removed by peeling it off from the skin, but if necessary, the gel may be wiped off after peeling, washed off with water, or both.

The topical skin preparation of the present invention can be manufactured according to a conventional method. That is, the first and second agents constituting the topical skin preparation kit of the present invention can be obtained by stirring each component at a predetermined temperature of about 25°C.

The present invention will be described below based on examples, but the scope of the present invention is not limited to these examples. In each of the following examples and reference examples, commercially available products were used as raw materials unless otherwise specified.

<Production of topical skin preparation>
Examples 1 to 3, Comparative Example 1
According to the composition shown in Table 1, a kit of the present invention was prepared.

[First agent]
Purified water was added to a beaker, and then the ingredients listed in the first part were added and stirred to obtain the first part.
[Second Agent]
Purified water was added to a beaker, and then the ingredients listed in the second part were added and stirred to obtain the second part.

<Evaluation of the properties of topical skin preparations>
The properties of the skin external preparations obtained in Examples 1 to 3 and Comparative Example 1 were evaluated according to the following procedures.

<Evaluation Example 1. Viscosity Evaluation>
The viscosity at 25°C of the first and second agents of Examples 1 to 3 and Comparative Example 1 shown in Table 1 was measured using a viscometer (Model RVT manufactured by Brookfield). The rotor No. was 4 and the rotation speed was 4 rpm. The results are shown in Table 1.

Evaluation Example 2: Evaluation of film strength
For Examples 1 to 3 and Comparative Example 1 listed in Table 1, 10 g of the first agent and 5 g of the second agent were mixed, uniformly spread to a radius of 52 mm and a thickness of 7 mm, and solidified to obtain a gel composition. The force required to break the obtained gel composition was measured. Specifically, one end of the gel composition was attached to a digital force gauge (ZP-500N, manufactured by Imada Co., Ltd.) and slowly pulled vertically, and the force required to break the gel composition was measured. The results are shown in Table 1.

Evaluation Example 3: Evaluation of brittleness
Packs were prepared using the kits obtained in Examples 1 to 3 and Comparative Example 1, and the packs obtained were applied to the skin, and the resistance to tearing when peeled off and the amount of residue on the skin were evaluated. First, the measurement site (5 x 5 cm) on the inside of the forearm of the subjects (one male and one female in their 20s) was washed with a facial cleanser and rested for 15 minutes. Next, 2 g of the pack agent, which is a mixture of the first agent and the second agent in a ratio of 2:1, was applied to the measurement site and left to stand for 10 minutes. Next, a questionnaire was conducted regarding the resistance of the pack agent to tearing when removing the solidified (gelled) pack agent and the amount of residue on the skin. The questionnaire was evaluated on a five-point scale of 1 (very bad) to 3 (same as Comparative Example 1) to 5 (very good) based on Comparative Example 1, and the average score was calculated. The subjects rested in the measurement room during the measurement. The results are shown in Table 1.

Evaluation Example 4: Evaluation of Usability
Packs were prepared using the kits of the present invention obtained in Examples 1 to 3 and Comparative Example 1, and the packs obtained were evaluated for each item during and after use. First, the measurement site (5 x 5 cm) on the inside of the forearm of the subjects (one male and one female in their 20s) was washed with a facial cleanser and rested for 15 minutes. Next, 2 g of the pack, which was a mixture of the first agent and the second agent in a ratio of 2:1, was applied to the measurement site and left to stand for 10 minutes. Next, the solidified (gelled) pack was removed and wiped off with a cloth lightly dampened with water. Then, a questionnaire was conducted regarding ease of application and moisturizing feeling after removal. The questionnaire evaluation was performed on the items in Table 1, with Comparative Example 1 as the standard, and a five-point scale of 1 (very bad) to 3 (same as Comparative Example 1) to 5 (very good) was calculated. The subjects rested in the measurement room during the measurement. The results are shown in Table 1.

As can be seen from Table 1, the topical skin preparation containing tamarind gum, water, a filler, and a polyhydric alcohol obtained using the kit of the present invention had a higher film strength and a moderate hardness compared to the topical skin preparation of the comparative example, and was therefore easy to peel off after use as a pack. In addition, it was easy to apply and therefore easy to use. Furthermore, while the topical skin preparation of the comparative example is known to have an excellent moisturizing effect, the topical skin preparation of the present invention also had an excellent moisturizing feeling, comparable to that of the comparative example.

<Production of foaming skin preparation>
Examples 4 to 17, Comparative Example 2
According to the composition shown in Table 2, a kit of the present invention was prepared.

[First agent]
Purified water was added to a beaker, and then the ingredients listed in the first part were added and stirred to obtain the first part.
[Second Agent]
Purified water was added to a beaker, and then the ingredients listed in the second part were added and stirred to obtain the second part.

<Evaluation of the properties of foaming skin topical preparations>
According to the following procedures, the properties of the foamable skin preparations for external use obtained in the above Examples 4 to 17 and Comparative Example 2 were evaluated.

<Evaluation Example 1. Viscosity Evaluation>
The viscosity at 25°C of the first and second agents of Examples 4 to 17 and Comparative Example 2 shown in Table 2 was measured using a viscometer (Brookfield Model RVT). The rotor No. was 4 and the rotation speed was 4 rpm. The results are shown in Table 2.

Evaluation Example 2: Evaluation of film strength
For Examples 4 to 17 and Comparative Example 2 listed in Table 2, 10 g of the first agent and 5 g of the second agent were mixed, uniformly spread to a radius of 52 mm and a thickness of 7 mm, and solidified to obtain a gel composition. The force required to break the obtained gel composition was measured. Specifically, one end of the gel composition was attached to a digital force gauge (ZP-500N, manufactured by Imada Co., Ltd.) and slowly pulled vertically, and the force required to break the gel composition was measured. The results are shown in Table 2.

Evaluation Example 3: Evaluation of brittleness
Packs were prepared using the kits obtained in Examples 4 to 17 and Comparative Example 2, and the packs obtained were applied to the skin, and the resistance to tearing when peeled off and the amount of residue on the skin were evaluated. First, the measurement site (5 x 5 cm) on the inside of the forearm of the subjects (one male and one female in their 20s) was washed with a facial cleanser and rested for 15 minutes. Next, 2 g of the pack agent, which is a mixture of the first agent and the second agent in a ratio of 2:1, was applied to the measurement site and left to stand for 10 minutes. Next, a questionnaire was conducted regarding the resistance of the pack agent to tearing when removing the solidified (gelled) pack agent and the amount of residue on the skin. The questionnaire was evaluated on a five-point scale of 1 (very bad) to 3 (same as Comparative Example 1) to 5 (very good) based on Comparative Example 2, and the average score was calculated. The subjects rested in the measurement room during the measurement. The results are shown in Table 2.

Evaluation Example 4: Evaluation of Usability
Packs were prepared using the kits of the present invention obtained in Examples 4 to 17 and Comparative Example 2, and the packs obtained were evaluated for each item during and after use. First, the measurement site (5 x 5 cm) on the inside of the forearm of the subjects (one male and one female in their 20s) was washed with a facial cleanser and rested for 15 minutes. Next, 2 g of the pack prepared by mixing the first agent and the second agent in a ratio of 2:1 was applied to the measurement site and left to stand for 10 minutes. Next, the solidified (gelled) pack was removed and wiped off with a cloth lightly dampened with water. Then, a questionnaire was conducted regarding ease of application and moisturizing feeling after removal. The questionnaire evaluation was performed on the items in Table 2, with Comparative Example 1 as the standard, and a five-point scale of 1 (very bad) to 3 (same as Comparative Example 1) to 5 (very good) was used to calculate the average score. The subjects rested in the measurement room during the measurement. The results are shown in Table 2.

As can be seen from Table 2, the foamable skin topical preparation containing tamarind gum, water, a filler, a polyhydric alcohol, an acid, and a carbon dioxide gas generating substance obtained using the kit of the present invention had a higher film strength and a moderate hardness than the foamable skin topical preparation of the comparative example, and was therefore easy to peel off after use as a pack. It was also easy to apply and use. Furthermore, while the foamable skin topical preparation of the comparative example is known to have an excellent moisturizing effect, the skin topical preparation of the present invention also had an excellent moisturizing feeling equivalent to that of the comparative example, or even better than that of the comparative example.

From the above results, it can be seen that the topical skin preparation of the present invention contains a filler and a polyhydric alcohol together with tamarind gum, and therefore has excellent film strength, making it easy to peel off and apply, and has excellent moisturizing effects. In particular, it can be seen that the composition contains a filler, a polyhydric alcohol acid, and a carbon dioxide gas generating substance together with tamarind gum, and therefore has excellent film strength, making it easy to peel off and apply, and has moisturizing effects that are equal to or even improved from conventional compositions. It can also be seen that by making the composition into a kit of the present invention, it is easy to mix at the time of use, and therefore an easily usable topical skin preparation can be obtained.

[Production Example]
A kit of the present invention was produced according to the composition shown in Table 3. The first agent and the second agent of the obtained kit were mixed in a ratio of 2:1 to prepare a pack agent. The viscosity of the first agent was 10,000 mPa·s to 45,000 mPa·s, and the viscosity of the second agent was 3,000 mPa·s or less. An appropriate amount of the obtained pack agent was applied to the skin depending on the application area. After leaving it to stand for 10 minutes, the solidified pack agent was removed and wiped off with a cloth lightly moistened with water. The pack agent had excellent film strength and was easy to peel off and apply. In addition, a high moisturizing effect was obtained after use.

The topical skin preparation of the present invention contains tamarind gum, water, a filler, and a polyhydric alcohol, and thus provides a topical skin preparation with high film strength and easy peeling, making it highly applicable in industrial applications.

Claims (3)

A kit for obtaining a skin topical preparation, the kit being characterized in that the first agent is a composition containing tamarind gum, water, and a filler, and the second agent is a composition containing a polyhydric alcohol. A skin preparation containing tamarind gum, water, a filler, and a polyhydric alcohol. The topical skin preparation according to claim 2, characterized in that the filler is at least one selected from silica, titanium oxide, zinc oxide, iron oxide, talc, and hydrophobized starch.