JPH04368314A - Patch - Google Patents

Abstract

PURPOSE:To obtain a patch pleasantly making rice bran or essence of rice bran act on the skin face because of supply of rice bran or essence of rice bran in the form of patch, applicable for many hours, having no fear of staining cloth, etc. CONSTITUTION:Rice bran or essence of rice bran is added to a tacky agent layer to give a patch showing beautifying effects.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patch constructed to exhibit a cosmetic effect by containing rice bran or a rice bran extract in an adhesive layer.

0002

[Prior art] Since ancient times, rice bran has been kneaded into
It has been used as a material to improve skin conditions and obtain cosmetic effects. For example, attempts have been made to improve the condition of the skin by applying a mixture of rice bran to the skin surfaces of the face, elbows, knees, etc., and the effectiveness thereof has also been evaluated.

[0003] However, rice bran has the fatal problem of not only requiring a complicated kneading process but also emitting a peculiar odor. In addition, it is thought that better results can be obtained by applying the rice bran mixture to the skin for a longer period of time, but this may be due to insufficient adhesion of the mixture to the skin. , probably because of the odor mentioned above, it was not used continuously for a long time. Therefore, in order to eliminate the above-mentioned disadvantages of rice bran, a cosmetic containing an extract of rice bran instead of rice bran has been proposed (Japanese Patent Laid-Open No. 2-53705).

However, the cosmetics disclosed in JP-A No. 2-53705 still have the problem that when applied to the skin, they tend to separate from the skin and the effects of rice bran cannot be fully exerted on the skin. It remained. In addition, there is also the problem that the cosmetics separated from the skin adhere to clothing and stain the clothing.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve the above-mentioned problems with conventional cosmetics using rice bran, and its purpose is to improve the skin-improving effect or beautify the skin of rice bran. To provide a patch that is simple and comfortable to act and can act for a long time.

[0006]

[Means for Solving the Problems] The present inventors have taken into account that conventional cosmetics using rice bran or rice bran extracts are easily separated from the skin and difficult to apply for a long period of time. As a result of intensive studies on means to solve these problems, it was discovered that the above problems could be achieved by constructing a patch by incorporating rice bran or rice bran extract into the adhesive layer, and the present invention was realized. It was accomplished. That is, the present invention is a patch comprising rice bran or a rice bran extract in the adhesive layer.

[0007] The rice bran used in the present invention is obtained when brown rice is ground and polished, and the rice bran obtained may be used as it is, or may be pulverized if necessary. Alternatively, it is also possible to use a rice bran extract extracted from the rice bran obtained as described above or its pulverized product with water, hot water, an organic solvent, or the like. Furthermore, rice bran or rice bran extract may be used in combination.

[0008] As the adhesive for forming the adhesive layer, acrylic adhesives commonly used in adhesive patches,
Examples include silicone adhesives and rubber adhesives. Examples of the acrylic pressure-sensitive adhesive include (co)polymers of alkyl (meth)acrylates and copolymers with other copolymerizable monomers. As the silicone adhesive, an appropriate adhesive containing polydimethylsiloxane or the like as a main component can be used. In addition, as rubber-based adhesives, natural rubber, styrene-isoprene-styrene block copolymer (SIS), polyisoprene (IR
), polybutene, polyisobutylene, ethylene-vinyl acetate copolymer, etc., to which a tackifying resin, a softener, a stabilizer, etc. are added are used.

Furthermore, in addition to the above-mentioned adhesives, it is also possible to use hydrophilic adhesives such as polyvinyl ether, gel adhesives made of polyhydric alcohol, water, and the like. No matter which adhesive is used, in the case of rice bran, the rice bran is contained in an amount of 18 to 63% by weight of the total weight of the adhesive layer. If the content ratio of rice bran is less than this, sufficient beauty effects cannot be obtained. On the other hand, if it is more than the above range, the application surface becomes rough and the application properties are extremely reduced. be.

In the case of rice bran extract, it is contained in an amount of 28 to 73% by weight of the total weight of the adhesive layer. If the content ratio of rice bran extract is less than this, sufficient beauty effects cannot be obtained.On the other hand, if it is more than the above range, the rice bran extract will ooze out onto the application surface and the application properties will decrease. Because it does.

[0011] Furthermore, a moisturizing agent may be added to the adhesive layer of the patch of the present invention, and the moisturizing effect of the moisturizing agent allows the beauty effects of rice bran or rice bran extract to be more effectively exhibited. can.

[0012] As moisturizing agents that can be used, urea, hyaluronic acid, carboxylic acid pyrrolidone (JCID: Japan General Cosmetic Ingredients Collection, 2-pyrrolidone (-5
-carboxylic acid)), lecithin or lanolin, and these humectants are added in an amount of 3 to 12% by weight of the total weight of the adhesive layer. This is because if the addition ratio is less than 3% by weight, a sufficient moisturizing effect cannot be obtained, and if it is added in excess of 12% by weight, the adhesive strength decreases.

Support In the adhesive patch of the present invention, a support may be used if necessary. That is, the pressure-sensitive adhesive layer containing the rice bran or rice bran extract is provided as a patch by being attached to one side of a support, if necessary. In this case, the support may be non-woven fabric, fabric, polyester, polyethylene,
Polyvinyl chloride, polyvinylidene chloride, polyethylene
Vinyl acetate copolymer, polyurethane, aluminum foil, laminate films thereof, etc. are used. When a material that is impermeable to water vapor is used as a support, the impermeable support provides a moisturizing effect to the adhesive layer, which, in combination with the effects of rice bran, improves the skin even more. Show effectiveness.

Other Additives The adhesive patch of the present invention can be mixed with fragrances, pigments, etc. to accommodate various tastes. Furthermore, if necessary, a preservative or the like may be added.

Manufacturing Method As a method for manufacturing the adhesive patch of the present invention, a conventional method for manufacturing adhesive tapes can be used. For example, a solution coating method or a hot melt coating method is employed. In the solution coating method,
The adhesive and rice bran or rice bran extract are uniformly mixed in a solution, and this mixture is applied onto a support and dried to form an adhesive layer. Alternatively, the adhesive layer may be laminated on one side of the support by coating the mixture on a release paper, drying, and transferring it to the support. In the hot-melt coating method, the adhesive and rice bran or rice bran extract are heated and melted and mixed uniformly, and the resulting mixture is melt-coated onto a support, release paper, or the like.

The thickness of the adhesive layer varies depending on the shape of the rice bran component mixed into the adhesive, but is usually in the range of about 20 μm to 2000 μm. If necessary, a release paper is provided on the adhesive layer for the purpose of protecting the adhesive layer. In this case, the release paper used is polyester, polypropylene, polyethylene-coated high-quality paper, polyethylene-coated glassine paper, etc., which has been treated with silicone mold release on one side.

[0017] When the entire area of the adhesive patch is increased and it is to be cut out for use, cuts or perforations may be made in accordance with the portion to be cut out, thereby making the cutting operation easier.

[0018]

[Operation and Effects of the Invention] The present invention is configured as a patch containing rice bran or rice bran extract in the adhesive layer, so that rice bran or rice bran extract can be removed by simply applying the patch to the human skin. The extract can be easily applied to the skin for the required amount of time. That is, it can be applied to the skin for a long period of time, and since rice bran or its extract is contained in the adhesive layer, it does not fall off from the skin surface during application. Moreover, since the adhesive layer firmly adheres to the skin due to the adhesive action, the adhesive layer can be kept in place even when going out, taking a bath, or sleeping. That is, it becomes possible to apply rice bran to the skin surface regardless of time or place.

[0019] Therefore, the effect of rice bran on improving the skin surface condition can be maximized by using the patch of the present invention. In addition, if the above-mentioned humectant is added to the adhesive layer, it can have a good effect on skin roughness caused by atmospheric dryness, etc., and in combination with the effect of the rice bran mentioned above, it is more effective. It is possible to exhibit even more excellent skin condition improving effects.

[0020]

EXAMPLES The present invention will now be explained by describing non-limiting examples thereof.

Example 1 An adhesive (Primal N-580NF: methacrylic acid and acrylic n-butyl
- 40 parts by weight of the copolymer obtained in an aqueous solution of butyl aminoacetic acid (solid content 50% by weight), and the resulting mixture was placed on a support made of polyethylene with a thickness of 60 μm to form an adhesive layer after drying. After spreading it to a thickness of 800 to 1000 μm, it was dried at 60° C. for 1 hour to obtain a patch.

Example 2 A patch was obtained in the same manner as in Example 1, except that the blending ratio of rice bran was changed from 5 parts by weight to 20 parts by weight. In addition, when comparing the patches of Example 1 and Example 2, it seems that the effect of rice bran is increased in the patch of Example 2, which has a higher content of rice bran, but the particle size is lower than that of other ingredients. It was observed that the adhesive strength tended to decrease due to the increase in rice bran with a large amount of rice bran.

Example 3 Example 1 except that 5 parts by weight of rice bran was changed to 10 parts by weight of rice bran pulverized to a particle size of 60 mesh or less.
A patch was obtained in the same manner as above.

Example 4 A patch was obtained in the same manner as in Example 3, except that the amount of ground rice bran was changed from 10 parts by weight to 30 parts by weight. In contrast to the patch of Example 1, the patch of Example 2 has the following:
Adhesiveness was lower due to the increased rice bran content, but since Examples 3 and 4 used ground rice bran, the patch of Example 4 was superior to the patch of Example 3. In this case, the decrease in stickiness due to the increase in rice bran content was small.

Example 5 Ethyl acetate in an amount 7 times the weight of rice bran was added to rice bran to extract rice bran extract. Ethyl acetate was removed from the extract by evaporation, and 10 parts by weight of the remaining oily rice bran extract was mixed with 40 parts by weight of an adhesive (Primal N-580NF),
The resulting mixture was dried on a 60 μm thick support made of polyethylene so that the adhesive layer had a thickness of 180 to 200 μm.
m, and then dried at 60° C. for 1 hour to obtain a patch.

Example 6 The amount of oily rice bran extract was varied from 10 parts by weight to 50 parts by weight.
A patch was obtained in the same manner as in Example 5, except that the parts by weight were changed. In Examples 5 and 6, rice bran fiber components that adversely affect adhesiveness were not contained, so
In all cases, the adhesiveness was very good.

Example 7 10 parts by weight of rice bran pulverized to a particle size of 60 mesh or less, 3 parts by weight of urea, and an adhesive (Primal N-580)
The resulting mixture was spread on a support made of polyethylene with a thickness of 60 μm so that the thickness of the adhesive layer after drying was 800 to 1000 μm, and then heated at 60°C. A patch was obtained by drying for 1 hour.

Example 8 A patch was obtained in exactly the same manner as in Example 7, except that the amount of ground rice bran blended was changed from 10 parts by weight to 30 parts by weight.

Example 9 Ethyl acetate in an amount seven times the weight of the rice bran was added to rice bran to extract the rice bran extract. 10 parts by weight of extracted rice bran extract,
3 parts by weight of urea and adhesive (Primal N-580NF,
40 parts by weight (solid content: 50% by weight), and the mixture was spread on a support made of polyethylene with a thickness of 60 μm so that the thickness of the adhesive layer after drying was 180 to 200 μm, and then heated at 60°C. A patch was obtained by drying for 1 hour.

Example 10 A patch was obtained in the same manner as in Example 9, except that the amount of rice bran extract was changed from 10 parts by weight to 50 parts by weight.

Example 11 An adhesive (manufactured by BASF, trade name:
It consists of 50 parts by weight of Lutonal I30, 50 parts by weight of Lutonal IC125 (trade name, manufactured by BASF), and 100 parts by weight of ethanol, uniformly dissolved in these proportions. ) and 40 parts by weight, and the resulting mixture was mixed to a thickness of 6
A patch was obtained by spreading the adhesive layer on a 0 μm polyethylene support so that the thickness of the dried adhesive layer was 800 to 1000 μm, and then drying at 60° C. for 1 hour.

Example 12 A patch was obtained in the same manner as in Example 11, except that the amount of ground rice bran powder crushed to a particle size of 60 mesh or less was changed from 10 parts by weight to 30 parts by weight.

Example 13 Ethyl acetate in an amount 7 times the weight of the rice bran was added to rice bran to extract the rice bran extract. 10 parts by weight of the extracted rice bran extract was mixed with 40 parts by weight of the adhesive used in Example 11, and the resulting mixture was placed on a polyethylene support with a thickness of 60 μm so that the thickness of the adhesive layer after drying was 180 ~ After spreading to a thickness of 200 μm, a patch was obtained by drying at 60° C. for 1 hour.

Example 14 A patch was obtained in the same manner as in Example 13, except that the amount of rice bran extract was changed from 10 parts by weight to 50 parts by weight.

Example 15 10 parts by weight of rice bran pulverized to a particle size of 60 mesh or less, 5 parts by weight of urea, and an adhesive (BAS) consisting of polyvinyl isobutyl ether and polyvinyl methyl ether.
Manufactured by Company F, trade name: 50 parts by weight of Lutonal I30, 50 parts by weight of Lutonal IC125, and 100 parts by weight of ethanol.
Parts by weight are uniformly mixed and dissolved in this ratio. ) and 40 parts by weight, and the resulting mixture was mixed to a thickness of 6
After spreading on a 0 μm polyethylene support so that the thickness of the adhesive layer after drying is 800 to 1000 μm,
A patch was obtained by drying at 60°C for 1 hour.

Example 16 A patch was obtained in the same manner as in Example 15, except that the amount of ground rice bran was changed from 10 parts by weight to 30 parts by weight.

Example 17 10 parts by weight of rice bran pulverized to a particle size of 60 mesh or less, 20 parts by weight of polyvinyl alcohol and water mixed and dissolved in a ratio of 10% by weight of polyvinyl alcohol and 90% by weight of water. and 20 parts by weight of glycerin, and after mixing, while maintaining the temperature at 40 to 50°C, 25 parts by weight of a solution of 10 parts by weight of gelatin dissolved in 15 parts by weight of water were further added and mixed.

[0038] To the resulting mixture, add 10% dialdehyde starch.
By gradually adding 4 parts by weight of a solution of 90 parts by weight dissolved in 90 parts by weight of water while stirring, the mixture was gradually gelled to obtain a paste-like substance. The obtained paste-like substance was spread on a polyethylene support having a thickness of 60 μm so that the thickness of the adhesive layer after drying was 800 to 1000 μm to obtain a patch.

Example 18 A patch was obtained in exactly the same manner as in Example 17, except that the amount of ground rice bran blended was changed from 10 parts by weight to 30 parts by weight.

Example 19 Add 7 times the weight of ethyl acetate to rice bran to extract the rice bran extract, and add 10 parts by weight of the extracted rice bran extract, 20 parts by weight of glycerin, and 10% by weight of polyvinyl alcohol to 90 parts by weight of water. 20 parts by weight of the solution obtained by dissolving the
After thoroughly mixing, 25 parts by weight of a solution prepared by dissolving 10 parts by weight of gelatin in 15 parts by weight of water was further added and mixed while maintaining the temperature at 40 to 50°C. To the resulting mixture, 4 parts by weight of a solution obtained by dissolving 10 parts by weight of dialdehyde starch in 90 parts by weight of water was gradually added while stirring, and the mixture was gradually gelled to obtain a paste-like substance. . The obtained paste-like substance was spread on a polyethylene support having a thickness of 60 μm so that the thickness of the adhesive layer after drying was 180 to 200 μm to obtain a patch.

Example 20 A patch was obtained in exactly the same manner as in Example 19, except that the amount of rice bran extract was changed from 10 parts by weight to 50 parts by weight.

Table 1 shows the amount of rice bran or rice bran extract added to the patches of Examples 1 to 20 obtained as described above, and the spreadability of the adhesive used in preparing the patches. Moreover, the adhesiveness to the skin and the cosmetic effect of the patches of Examples 1 to 20 were evaluated in the following manner.

Adhesiveness The patch was applied to 6 people, and the degree of peeling was visually evaluated 8 hours later. Cosmetic effect: It was applied to 6 people, and the moist feeling, moisturizing feeling, and beautiful skin feeling were sensually evaluated.

[0044]

[Table 1]

The meanings of the evaluation symbols for spreadability, adhesion to the skin, and cosmetic effect in Table 1 are as follows. Spreadability ◎: Very good, ○: Good, △: Slightly bad, ×: Bad.

Adhesiveness ◎: Only 10% or less of the total area was peeled off after 8 hours. Good: Peeling occurred in 10 to 30% of the total area after 8 hours. Δ: Peeling occurred in 30 to 50% of the total area after 8 hours. ×: After 8 hours, peeling occurred in an area of 50% or more of the total area.

Cosmetic effect ◎: The white and keratinized skin became transparent, became shiny and smooth, and the skin did not feel taut. ○: The white and keratinized skin became transparent and the skin no longer felt taut. △: Healing of the keratinized skin was observed, and a rough feeling remained. ×: No particular effect was observed.

Claims (1)

[Claims] 1. A patch characterized by having an adhesive layer containing rice bran or rice bran extract.