TWI453035B - Gel sheet for cosmetic patching - Google Patents

Description

Gel patch for cosmetic patch

The present invention relates to a gel sheet for cosmetic application which is attached to a face, a wrist, a foot, and the like. More specifically, it relates to a skin care gel patch for using a hydrogel external preparation.

The gel sheet for cosmetic application of the present invention is an external preparation for a hydrogel patch containing a large amount of water. It is characterized in that water such as a medicinal ingredient is exuded to the surface of the gel by adding a small amount of a hydrophobic polyol, and a moisturizing effect or the like is obtained by penetration of water or the like on the adhered skin.

Conventionally, Patent Document 1 relates to a sheet-like applicator characterized in that it contains a water-soluble polymer, a polyhydric alcohol, a moisturizing component, a crosslinking agent, a skin component, water, and the like as essential components. Here, the water-soluble polymer is a gelatin or a polyacrylate. The effect of the high-water-containing sheet-like patching agent is to impart moderate adhesion and moisture retention to the skin, and not only the stability of the physical properties of the preparation and the safety of the skin, but also the feeling of use during use and the skin. Excellent effect on application.

Patent Document 2 relates to a sheet-like patch for de-skin, characterized in that at least a layer of a hydrogel-like composition containing a polymer having a crosslinked carboxyl group and/or a salt thereof is provided on a support. On one side, the layer of the above aqueous gel-like composition further contains a polyol. The carboxyl group-containing polymer herein is described as polyacrylic acid, polymethacrylic acid, polyitaconic acid, alginic acid, carboxymethylcellulose, gelatin, pectin, carboxymethylhydroxyethylcellulose, methoxy group. An ethylene-maleic anhydride copolymer or the like.

Patent Document 3 relates to a sheet-like hydrogel which is a sheet-like hydrogel in which a synthetic polymer having a mesh structure is impregnated with a solution containing at least water, a surfactant, and an oil component, and a solution exudation accelerator, and The solution oozing accelerator is a polymer containing a glycol such as polyethylene glycol, polypropylene glycol or polyglycerin, or a polyol.

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 08-188527

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2002-020257

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2003-183147

However, due to the original viscosity of the water exuded from the gel sheet, that is, the extremely low viscosity and the dry touch, there is a problem of dripping on the clothes during use (drainage), and in use. The feeling of adhesion and the feeling of the feeling (moisturizing feeling) felt after use are insufficient.

In the publication of Patent Document 1, although a large amount of water is efficiently discharged to the outside during use, the concept of liquid oozing is introduced, but the state of the exudate is not considered, and thus the usability is used. The sense of use is not enough.

Patent Document 2 relates to a sheet-like patch for removing sebum, which effectively removes excess sebum and dirt, and does not accompany pain when peeled off from the skin, and can remove excess sebum while replenishing moisturizing side. There is also no description of liquid exudation, etc., and it is insufficient in terms of moisturizing feeling and the like.

In this regard, Patent Document 3 uses the above-described nonionic water-soluble polymer as a solution oozing agent, and has a high use effect because it oozes a solution containing a medicinal ingredient or the like. However, compared with glycerin, the nonionic water-soluble polymer has a low moisture absorption. Therefore, in order to improve the moisture retention of the oozing solution, it is necessary to have a higher moisture absorption and function as a solution oozing agent.

An object of the present invention is to provide a gel sheet for cosmetic application which is capable of reducing the oozing property of a solution from a surface of a gel and improving the moisturizing property of a solution which oozes, and at the same time, is easy to be dripped at the time of use. The so-called drooping problem that falls on the clothes is sufficient to give a feeling of effect (moisturizing feeling) due to the feeling of adhesion during use and the penetration of moisture or the like into the applied skin after use.

As a result of intensive evaluation and review by the present inventors, it was found that guar gum of guar gum seeds obtained from legumes was hydroxypropylated with hydroxypropyl guar gum and as exudation. When the polyoxyethylene ethylglycoside is added, the exudation property of the solution derived from the gel is not lowered, and the viscosity of the exudation solution is increased, and the improvement of the sag, the feeling of intimacy in use, and the feeling after use The sense of effect (moisturizing feeling) can be noticeable.

Thus, the present invention relates to a gel sheet for cosmetic application comprising at least a synthetic polymer having a mesh structure, a hydroxypropyl guar, a wetting agent, and a polyoxyethylidene methyl glucoside as an exuding agent. And the water is characterized in that it contains 0.05 to 3 parts by weight of hydroxypropyl guar and 3 to 12 parts by weight of polyoxyethylidene glucoside in 100 parts by weight of the gel sheet.

The gel sheet for cosmetic application of the present invention is as described above, and the composition thereof comprises at least: an aqueous liquid impregnated on the surface of the gel body in a synthetic polymer having a mesh structure comprising hydroxypropyl guar gum. a sheet-like hydrogel, polyoxyethylidene methyl glucoside as an exuding agent for allowing the liquid to exude on the surface of the gel, and water, thereby not lowering the exudation property of the solution derived from the gel and increasing the exudation solution The moisturizing property, at the same time, the viscosity of the oozing solution is increased, and the effect of the drooping property, the feeling of intimacy in use, and the feeling of feeling (moisturizing feeling) felt after use can be obtained.

(synthetic polymer)

The synthetic polymer is not particularly limited as long as it can form a mesh structure and form a gel containing at least water. When the hydrogel is used as a transdermal application in the field of cosmetics, a synthetic polymer permitted in the field can be used. In particular, a synthetic polymer having hydrophilicity is used, and among them, a synthetic polymer having an anionic functional group is also more suitable. Examples of the synthetic polymer include a polymer having a carboxyl group as a functional group, a polymerizable unsaturated monomer such as methacrylic acid, and the like (for example, a sodium salt, a potassium salt or a triethanolamine salt). A polymer of a polymerizable unsaturated monomer such as a third butyl acrylamide sulfonate having a sulfo group as a functional group, and a salt (for example, a sodium salt or a potassium salt). A preferred polyhydric polymer can be sodium polyacrylate. The preferred content is 0.5 to 35 parts by weight in 100 parts by weight of the gel sheet.

Further, the synthetic polymer before crosslinking may be partially crosslinked as long as it does not interfere with the production of the sheet-like hydrogel. Further, in consideration of the workability at the time of production, it is preferred to use a synthetic polymer having a weight average molecular weight of from 100,000 to 5,000,000 before crosslinking.

(crosslinking agent)

The mesh structure of the synthetic polymer can be obtained by crosslinking of the synthetic polymer before crosslinking. That is, a cross-linking agent is added to the synthetic polymer before cross-linking, and if necessary, it is heated to obtain a mesh structure.

Examples of the crosslinking agent include aluminum hydroxide, potassium alum, aluminum sulfate, aluminum glycinate, aluminum acetate, aluminum oxide, aluminum metasilicate, magnesium chloride, calcium hydroxide, calcium carbonate, magnesium aluminum metasilicate, Polyethyleneimine, polyethylene glycol diglycidyl ether, glycerol triglycidyl ether, triglycidyl isocyanurate, and the like.

The content is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the gel sheet for cosmetic application.

(pH adjuster)

In addition to the α-hydroxy acid such as tartaric acid, lactic acid or glycolic acid, various organic acids such as citric acid or inorganic acids such as hydrochloric acid may be used as the optimum pH for the action of the crosslinking agent. Use of pH adjuster (acid catalyst).

The content is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the gel sheet for cosmetic application.

The gel sheet for cosmetic application of the present invention can also be colored by a pigment or the like, but it is preferably one having a transparent to almost transparent appearance. In the so-called transparent system of the present invention, when the gel sheet is placed on a white high-quality paper printed with black dots of 20 characters, it is preferable to ensure transparency with respect to the presence or absence of characters. In the gel sheet for cosmetic application of the present invention, the inside of the gel sheet contains a sufficient aperture ratio in the thickness direction without impairing the transparency of the gel sheet and improving the tear strength and handleability of the gel sheet. Large weaving or non-woven fabrics are preferred. Meanwhile, in the present invention, the woven fabric or the non-woven fabric having a large opening ratio means that a large aperture ratio (maintaining transparency) having a degree of 20-point layout can be judged even if it is passed through a woven fabric or a non-woven fabric.

The gel sheet for cosmetic application having a transparent to almost transparent appearance of the present invention has an effect of improving the excellent appearance of the desired portion in addition to the improvement effect of the skin by the attached gel sheet. .

The thickness of the gel sheet for cosmetic application of the present invention may be different depending on the thickness of the gel sheet for the cosmetic application, and it is preferably 0.1 to 3 mm in thickness in order to secure adhesion, transparency and strength. If it is less than 0.1 mm, the strength of the gel sheet is weak, or when it exceeds 3 mm, the gel sheet itself is too heavy and there is insufficient adhesion. Further, when the thickness of the entire gel sheet is insufficient, a part of the gel sheet may be thickened to a thickness of 6 mm.

(hydroxypropyl guar)

The hydroxypropyl guar used in the present invention is a natural water-soluble polymer polysaccharide guar contained in the endosperm portion of the guar seed of legumes by using sodium hydroxide and epoxy A method of propane reaction or the like, which is obtained by substituting a hydroxyl group with a hydroxypropyl group.

In order to improve the sagability of the aqueous solution exuded from the gel sheet, it is considered that by adding other cellulose ethers or cellulose, guar gum, cationized guar gum, starch, yellow, which are used as water-soluble tackifiers. Polysaccharides such as xanthan gum and their derivatives can be solved by increasing the viscosity of water in the hydrogel, but the water retention of the gel itself increases and there is a chemical solution derived from the gel. The problem that the solution bleed out is suppressed is caused. On the other hand, the viscosity of the bleed solution does not rise and the texture is the original dry sensation, and the above-mentioned improvement effect is insufficient.

The degree of substitution of the hydroxypropyl group in the hydroxypropyl guar is preferably from 0.4 to 1.2. More preferably, the effect of 0.6 to 1.0 is higher.

The hydroxypropyl guar gum is contained in an amount of 0.05 to 3 parts by weight based on 100 parts by weight of the gel sheet for cosmetic application. When the hydroxypropyl guar is less than 0.05 part by weight in 100 parts by weight of the gel sheet for cosmetic application, it does not improve the sagability and is dense in use as compared with the case without hydroxypropyl guar. The sense of care is reduced, and the moisturizing feeling felt after use is also lowered. When the content of the hydroxypropyl guar is more than 3 parts by weight in 100 parts by weight of the gel sheet for cosmetic application, the feeling of use at the time of use is deteriorated because of the strong sticky feeling. The hydroxypropyl guar gum is preferably contained in an amount of 0.1 to 2 parts by weight, preferably 0.2 to 1 part by weight, per 100 parts by weight of the gel sheet for cosmetic application.

(exuding agent)

The exuding agent is a agent used to effectively ooze the solution in the hydrogel out of the surface of the hydrogel. Also known as solution oozing accelerator. The water inside the hydrogel can be effectively spit out, for example, by formulating a substance which is both hydrophilic and somewhat hydrophobic.

The nonionic water-soluble polymer in the present invention is a polyoxyethylidene methyl glucoside.

The polyoxyethylidene ethyl glucoside is preferably contained in an amount of from 3 to 12 parts by weight per 100 parts by weight of the gel sheet for cosmetic application. When the polyoxyethylidene ethyl glucoside is less than 3 parts by weight in 100 parts by weight of the gel sheet for cosmetic application, the feeling of adhesion and the feeling of effect are insufficient. When the polyoxyethylidene ethyl glucoside exceeds 12 parts by weight in 100 parts by weight of the gel sheet for cosmetic application, the amount of bleeding is too large, and the drooping property is poor. A more preferred range is 6 to 10 parts by weight.

Polyoxyethylene methyl glucoside is a nonionic water-soluble polymer having a moisture absorption rate of 70 when the moisture absorption of glycerin is 100. The nonionic water-soluble polymer having a large moisture absorption rate has a large water retention capacity, but has the ability to cause the solution in the hydrogel to exude on the surface of the hydrogel, and further enhances the moisturizing feeling and the moisturizing effect of the oozing solution.

(humectant)

Examples of the humectant include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, isopropyl glycol, 1,3-butylene glycol, sorbitol, and maltitol ( Maltitol), trehalose, raffinose, xylitol, mannitol, hyaluronic acid and its salts, various derivatives of trehalose and raffinose, trimethylglycine, cyclodextrin, hyaluronic acid and its salts, etc. Glycols, polyols and polysaccharides. These may be used alone or in combination of two or more.

The preferred content of the humectant is 1 to 30 parts by weight based on 100 parts by weight of the gel sheet for cosmetic application.

(medicinal ingredients)

The medicinal ingredient which can be blended in the present invention is not particularly limited as long as it is a user of a conventional pharmaceutical, a quasi drug, a cosmetic, a sanitary material, or a miscellaneous product, and examples thereof include: tomorrow leaf extract , Avocado Extract, Sweet Tea Extract, Herbal Hollyhock Extract, Arnica Extract, Apricot Extract, Apricot Kernel Extract, Cumin Extract, Turmeric Extract, Oolong Tea Extract, Echinacea Extract, Astragalus Extract, Cortex Extract, Barley Extract, Dutch Mustard Extract, Citrus Extract, Seawater Drying, Hydrolyzed Elastin, Hydrolyzed Wheat Powder Extract, Hydrolyzed Milk Extract, Chamomile Extract, Carrot Extract, Artemisia selengensis Extract, Licorice Extract, Rose Flower Extract, Kiwi Fruit Extract, Quinine Extract, Small Yellow Paw Extract, Guanosine, Mountain White Bamboo Extract, Walnut Extract, Grapefruit Extract, Clematis Extract, yeast extract, burdock extract, comfrey extract, collagen, cranberry extract, Bupleurum extract, umbilical cord extract, a string of red extracts, Soap extract, bamboo extract, Crataegus cuneata extract, shiitake mushroom extract, Rehmannia extract, purple root extract, East China glutinous extract, Spiraea extract, Caladium root extract, Birch extract , Equisetum extract, Honeysuckle extract, Ivy extract, Crataegus oxyacantha extract, Black elm (Blcak elder) extract, Jerusalem artichoke extract, Peppermint extract, Mallow extract, Jujube extract, thyme extract, clove extract, whitegrass extract, dried tangerine peel extract, bitter orange peel extract, Houttuynia cordata extract, tomato extract, natto extract, mantis extract, wild rose extract , hibiscus extract, wheat winter extract, parsley extract, honey, medicinal wall extract, blue musk tea extract, bisabol extract, coltsfoot dandelion extract, butterbur extract , Fuxi Extract, False Leaf Extract, Grape Extract, Propolis Extract, Loofah Extract, Peppermint Extract, Eucalyptus Extract, Hop Extract, Pine Bark Extract, Buckeye Extract Water Plantain Extract, Sapindus Extract, Peach Extract, Bluebonnet Extract, Eucalyptus Tree Extract, Orange Extract, Wormwood Extract, Lavender Extract, Apple Extract, Lettuce Extract, Lemon Extract, Milk vetch extract, rose extract, rosemary extract, Roman chamomile extract, royal jelly extract, etc.

Also mentioned are: biopolymers such as deoxyribonucleic acid, sodium chondroitin sulfate, collagen, elastin, chitin, chitosan, hydrolyzed eggshell membrane, etc.; amino acid, urea, pyrrole Moisturizing ingredients such as sodium ketone ketone, betaine, whey, trimethylglycine; oily components such as sphingolipid, neuropterin, cholesterol, cholesterol derivatives, phospholipids; ε-aminohexanoic acid, Anti-inflammatory agents such as glycyrrhizic acid, β-glycyrrhetinic acid, chlorinated lysozyme, guaiac blue oil hydrocarbon, cortisol; vitamin A, vitamin B, vitamin B6, vitamin D, vitamin E, calcium pantothenate, biotin, nicotine Vitamins such as guanamine; active ingredients such as allantoin, diisopropylamine dichloroacetate, 4-aminomethylcyclohexanecarboxylic acid; tocopherol, carotenoids, flavonoids, tannins, lignans ), saponin and other antioxidants; γ-methanol, vitamin E derivatives and other blood circulation promoters; retinol, retinol derivatives and other wound healing agents; head flower ginseng, capsicum, eucalyptus, containing Iodine garlic essence, pyridoxine hydrochloride, d1-α-tocopherol, d1-α tocopherol Acid ester, nicotinic acid, nicotinic acid derivative, calcium pantothenate, D-panthenol, ethyl ethionyl ethyl ether, biotin, allantoin, isopropyl methyl phenol, estradiol, ethynyl Estradiol, Carpronium Chloride, benzalkonium chloride, Diphenhydramine Hydrochloride, Takanal, camphor, salicylic acid, citric acid vanilla Indamine, piroctone, ethanolamine salt, pentadecanoic acid glyceride, mononitroguaiacol, resorcinol, γ-aminobutyric acid, benzethonium chloride, hydrochloric acid Mexiletine Hydrochloride, auxin, female hormone, Cantharides tincture, Cyclosporin, hydrocotisone, polyoxyethyl ether sorbitan A fatty acid ester, an analgesic, a neuroleptic, a blood pressure lowering agent, an antibiotic, an antihistamine, an antibacterial substance, and the like.

The blending amount of the components may not be uniformly defined depending on the amount of the active ingredient of the material, but it is generally preferably 0.05 to 30% by mass based on the mass of the gel sheet for cosmetic application.

(Production method)

For example, a method may be employed in which at least a mixture of a synthetic polymer, a hydroxypropyl guar, a wetting agent, and water is mixed, and a crosslinking agent and a polyoxyethylidene methyl glucoside as an exuding agent are further added. Mix and react to the person. A preferred manufacturing method can be employed, characterized in that a pH adjusting agent (acid catalyst) is added to adjust the pH of the mixed solution to 4 to 7 and react it.

The most important one is to pre-add hydroxypropyl guar to the synthetic polymer and humectant to dissolve the hydroxypropyl guar, then add the cross-linking agent and polyoxyethyl ketone as the exuding agent. The point of glycosides. In other words, since the polyoxyethylidene ethyl glucoside is liquid at room temperature without problems, it is desirable that the hydroxypropyl guar gum is added before the gel is formed. If the hydroxypropyl guar gum is added after the gel is formed, the number of steps is increased to increase the cost, and a homogeneous patch cannot be formed. That is, if the hydroxypropyl guar gum is added after forming a gel, the solid hydroxypropyl guar is difficult to uniformly disperse on the surface of the gel, for example, because it is also added as a high viscosity in aqueous solution, It is difficult to disperse homogeneously. Further, in order to form a low-concentration aqueous solution in order to form a low viscosity, the required characteristics (usability, effect feeling) cannot be obtained due to excess water. Further, when it is not uniformly dispersed, the viscosity of the exudate is not uniform, and for example, some of them are easily peeled off or the moisturizing effect is only local, and the desired characteristics are not obtained, which is not preferable.

The method for producing a gel sheet for cosmetic application is, for example, at least 0.5 to 35 parts by weight of the synthetic polymer (preferably 1 to 30 parts by weight, more preferably 2 to 25 parts by weight) and hydroxypropyl guar 0.05. To 3 parts by weight (preferably 0.1 to 2 parts by weight, more preferably 0.2 to 1 part by weight) and 1 to 30 parts by weight (preferably 2 to 20 parts by weight) of the wetting agent, and a mixture of water, and then Adding 0.1 to 5 parts by weight of the crosslinking agent (preferably 0.5 to 2 parts by weight) and 3 to 12 parts by weight (preferably 6 to 12 parts by weight) of the polyoxyethylidene glucoside as an exuding agent and mixing Make it a reaction.

In the method for producing a gel sheet for cosmetic application, it is more preferred to add a pH adjuster (acid catalyst) to 0.1 to 10 parts by weight (preferably 1 to 5 parts by weight) to adjust the pH of the mixed solution to 4 To 7 and make it a reaction.

Further, the total amount of water is preferably 60 to 97 parts by weight, more preferably 70 to 95 parts by weight. Preferably, one part of the above water is added to the mixture of the crosslinking agent and the exuding agent and then added as a mixed solution.

[Examples]

Hereinafter, the invention will be described by way of examples and comparative examples, but the invention is not limited thereto.

(Example)

The gel-forming composition shown in the following table was used, and the gel pieces of each of the examples and the comparative examples used in the cosmetic patch were prepared in the following order. Add a wetting agent to the synthetic polymer and hydroxypropyl guar (HP guar) or other tackifier, add the medicinal ingredient and water, and mix well until it is homogeneous.

Adding polyoxyethylidene methyl glucoside as an exuding agent to the mixture, adding a crosslinking agent and water to sufficiently disperse and slurrying, and adding a pH adjuster (acid catalyst) to the slurry. In total, as 100 parts, the mixture was thoroughly mixed and stirred. Next, a spacer having a thickness of 1 mm was placed on four sides of a PET film (polyethylene terephthalate) having a thickness of 38 μm placed on a smooth glass plate, and an appropriate amount of the above composition was mixed to immediately flow into the central portion thereof. A nylon knitted fabric (half knitting) having a basis weight of 17 g/m ² and another PET film having a thickness of 38 μm were stacked, and then placed thereon with a glass plate for 24 hours to obtain a gel sheet having a thickness of 1 mm. The gel piece was cut into 5 cm × 5 cm as a sample for evaluation.

[Table 1]

The amount of exudation of the liquid exuded from the gel sheet was measured as follows.

The gel sheet was taken out from the bag immediately before the measurement and the double-sided PET film was peeled off, and after measuring the weight (a), the PET film was attached only to one side. Two glass plates (100 × 100 mm thickness: 3 mm) and filter paper (5 A diameter 150 mm round manufactured by Advantec Co., Ltd.) were prepared, and the weight (b) of the filter paper was measured and placed on a glass plate. A gel sheet was attached to the center of the filter paper with the gel facing down, and one glass plate was placed thereon and allowed to stand for 10 minutes. Then, the glass film and the PET film on the gel sheet were removed, the gel was removed, and only the weight (c) of the circular filter paper was measured, and the weight of the exudate was calculated from the difference from the weight of the previously determined filter paper. The amount of the liquid was taken as the amount of exudation ((c-b)/a) expressed as a ratio with respect to the weight of the original gel. The measured value is the average of the results of the same test using 3 gels. When the amount of exudation is too small, the adhesion to the skin is lowered, and it is easy to peel off during use, and the amount of penetration into the skin is small. Therefore, the effect of moisturizing and the like is insufficient, and when it is too large, the weight of the gel is shifted and dropped. Further, the excess liquid is dripped (dip liquid) and adhered to the clothes or the like, so that the amount of bleeding is preferably in the range of 20 to 35 (%).

As an evaluation of the patch

The gel pieces formed as described above were attached to the cheeks of 10 female subjects in a state where the upper body was sitting upright, and the adhesion and drooping evaluation were allowed to stand for 20 minutes, and the skin was peeled off after 20 minutes. The moisturizing feeling of the state was expressed in the following five stages of 1 to 5, and the usability and effect feeling of the patch were evaluated, and the total points of all the subjects were used as the evaluation results. Therefore, these evaluation values represent the magnitude of performance and effect (out of 50 points). The results are presented in the table.

Effect (moisturizing) assessment

5: I feel that the skin has obvious moisturizing.

4: I feel the skin is moisturized.

3: I feel a little moisturizing.

2: I feel that the skin is only slightly moisturized.

1: I can't feel the effect.

Usability (dragging) assessment

5: No drooping.

4: Only slightly sag.

3: Some drooling.

2: More drooling.

1: Excessive drooling, the degree of oozing liquid even adheres to clothing.

Usability (adhesion) assessment

5: Completely adhered to the skin without offset.

4: Almost the skin is tight, only a little offset.

3: There is some offset from the skin that is not intimate with the skin.

2: It is difficult to keep close to the skin and has a lot of deviation.

1: The offset is too large and falls.

As can be seen from Table 1, the gel tablets of Examples 1 to 6 were compared with Comparative Example 1 without the addition of polyoxyethylidene ethylglycoside, regardless of whether the medicinal component was aqueous or oily, and the amount of exudation was moderate and usable. (drip, adhesion), effect (moisturizing) is excellent. In Comparative Example 2 in which the polyoxyethylidene ethyl glucoside was 15 parts by weight with respect to 100 parts by weight of the gel sheet for cosmetic application, the amount of exudation was excessive due to excessive polyoxyethylidene methyl glucoside, and thus Insufficient sag and adhesion.

Comparative Examples 3 to 6 in which guar gum, cationized guar gum, xanthan gum, and hydroxyethyl cellulose were substituted as hydroxypropyl guar as other tackifiers, although the amount of exudation was moderate, but the sag, Insufficient adhesion and insufficient moisturizing feeling. Further, in Comparative Example 7 in which sodium hyaluronate was used as another tackifier, the drooping property was good, but the amount of bleeding was insufficient, the adhesion was lowered, and the moisturizing feeling was insufficient.

In comparison with Comparative Example 8 in which the HP guar gum exceeded 3 parts by weight, 100 parts by weight of the gel sheet for cosmetic application showed a strong adhesive feeling, and the feeling of use at the time of use deteriorated. Compared with 100 parts by weight of the gel sheet for cosmetic application, the HP guar was less than 0.05 part by weight of Comparative Example 9. Since the amount of HP guar was too small, the amount of bleeding was moderate, but the drooping property and the adhesion were insufficient. Insufficient effect.

[Industrial availability]

The present invention can be used as a gel sheet for cosmetic application applied to a face, a wrist, a foot, or the like, and can be used as a skin care gel patch for using a hydrogel external preparation.

Claims (2)

A gel sheet for cosmetic application, characterized in that it comprises at least a synthetic polymer having a mesh structure, a hydroxypropyl guar gum, a wetting agent, a polyoxyethylidene methyl glucoside as an exuding agent, and water. The synthetic polymer is a polymer selected from the group consisting of a polymerizable unsaturated monomer having a carboxyl group as a functional group, a polymer of such a salt, a polymerizable unsaturated monomer having a sulfo group as a functional group, and the like. Any one of the above humectants selected from the group consisting of ethanol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, isopropyl glycol, and 1,3-butylene glycol In the above, 100 parts by weight of the gel sheet contains 0.5 to 35 parts by weight of the above synthetic polymer, 0.05 to 3 parts by weight of hydroxypropyl guar, 1 to 30 parts by weight of the humectant, and polyoxyethylidene methyl glucose. The glycoside is 3 to 12 parts by weight. A method for producing a hydrogel external preparation, which is a method for producing a gel sheet for cosmetic application according to claim 1, wherein the hydroxypropyl guar is added to the synthetic polymer, the humectant, and the water in advance. The hydroxypropyl guar gum was dissolved, and then a crosslinking agent and polyoxyethylidene methyl glucoside were added to the mixture and mixed to cause a reaction.