JP4065081B2 - Hair removal adhesive with little skin irritation - Google Patents

Description

【００２６】
【表２】

【００２７】
【表３】

【００２８】
【表４】

【００２９】
【表５】

【００３０】
【表６】

【００３１】
【表７】

【００３２】
本発明の脱毛用粘着剤はいずれも表６の結果に認められるごとく脱毛用粘着剤として十分に脱毛効果のある良好な粘着性能を有していた。また、感応テストにおいても表７の結果に示されるごとく剥離時の痛みが軽減された高い実用性を有するものであった。
【００３３】
【発明の効果】
以上のごとく、本発明の脱毛用粘着剤は十分な脱毛効果を有することは勿論、剥離時（脱毛時）の痛みを軽減する皮膚刺激緩和効果を合わせて有するものであり、脱毛用テープに使用する粘着剤として有用である。
【図面の簡単な説明】
【図１】本発明の脱毛用粘着剤を使用して作成したシート状の脱毛テープの一例の透視斜視図である。
【図２】本発明の脱毛用粘着剤を使用して作成したロール状の脱毛テープの一例の斜視図である。
【符号の説明】
１ 脱毛用粘着剤
２ 基材
３ 離形紙[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hair removal adhesive with little skin irritation, and more particularly to a hair removal adhesive used for a sheet-like or roll-like hair removal tape having a skin irritation mitigation effect when hair grown on an arm, a leg or the like is extracted.
[0002]
[Prior art]
Conventionally, when removing unwanted hair growing on arms and legs, for example,
(1) A method of chemically decomposing and removing unwanted hair with a cream containing thiocholate;
(2) Method using a solid wax at room temperature;
(3) A method of removing hair using a blade such as a razor;
(4) Method of electrically burning the hair roots;
(5) A method of physically pulling out hair using an adhesive;
Etc. have been used.
[0003]
However, the method (1) has the advantage that the hair removal operation is easy and does not involve the pain of pulling out the hair, but has the disadvantage that the hair root part is not completely removed and the hair grows again in a short period of time.
[0004]
In addition, the method (2) has an advantage that hair can be removed from the hair root, so that it does not cause hair growth for a long time after hair removal. On the other hand, it requires complicated operations such as heating during use and skin irritation during hair removal. There are disadvantages such as large.
[0005]
Furthermore, in the method (3), it takes considerable skill to completely remove hair from the base of the hair, and there are many dangers such as injuries during hair removal. There are disadvantages such as being necessary and difficult to do personally.
[0006]
In addition, in the method using the adhesive (5), since the hair is physically pulled out from the hair root, the generation of new hair can be delayed, and the new hair itself gradually decreases during repeated hair removal. Although it can be said that it is the most effective method for hair removal, there is a drawback in that it is painful when the adhesive is applied to the skin, and then peeled off to remove the hair.
[0007]
On the other hand, as a method for reducing the pain at the time of peeling (at the time of hair removal), Japanese Patent Application Laid-Open No. 61-212513 discloses a method of blending a thin water-containing ethanol extract, which is a herbal medicine, into an adhesive. A technique for reducing pain during hair removal has been proposed.
[0008]
However, although the above-mentioned spicy water-containing ethanol extract certainly has an analgesic effect and a melanin production inhibitory effect, Depending on the amount or combination method, the pain-reducing effect may not be fully exhibited.
[0009]
[Problems to be solved by the invention]
The present invention was devised in view of the current state of the prior art. In the method of physically pulling out hair using an adhesive, the hair removal effect of the adhesive is sufficiently maintained when the adhesive is peeled from the skin and the skin irritation mitigating effect is achieved. An object of the present invention is to provide an adhesive for hair removal having a low skin irritation.
[0010]
[Means for Solving the Problems]
As a result of intensive studies on the hair removal pressure-sensitive adhesive having a sufficient hair removal effect at the time of hair removal and a skin irritation mitigation effect, the present inventors have completed the present invention.
[0011]
That is, the present invention is a hair removal pressure-sensitive adhesive comprising a skin irritation relaxation agent containing the following (i), (ii), and / or (iii) as an active ingredient in a pressure-sensitive adhesive:
(I) glycyrrhetinic acid;
(Ii) a glycyrrhetinic acid derivative;
(Iii) A mixture of glycyrrhetinic acid and stearic acid.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The hair removal pressure-sensitive adhesive of the present invention is obtained by blending a skin irritation relieving agent for relieving skin irritation at the time of hair removal into a pressure-sensitive adhesive. Glycyrrhetinic acid, disodium 3-succinyloxyglycyrrhetinic acid, glycyrrhetinic acid derivatives such as pyridoxine base glycyrrhetinic acid derivatives composed of intermolecular salts of glycyrrhetinic acid and pyridoxine (vitamin B6), and / or (iii) glycyrrhetinic acid and stearin It contains an acid mixture as an active ingredient.
[0013]
When (iii) a mixture of glycyrrhetinic acid and stearic acid is used as an active ingredient of the skin irritation relieving agent, the mixing ratio is not particularly limited, but the weight ratio of glycyrrhetinic acid to stearic acid is 1: 1 to 1: 3. It is preferable that they are mixed.
[0014]
The above-mentioned skin irritation relieving agent was first found by the present inventor to be incorporated in a hair removal adhesive to relieve skin irritation at the time of hair removal, and the polymer component and each compounding agent were heated at a high temperature of 120 ° C to 220 ° C. In this case, they are stable as they have little sublimation and are optimal as HM type additives.
[0015]
In the hair removal pressure-sensitive adhesive of the present invention, the pressure-sensitive adhesive comprises (a) ABA type styrene-diene block copolymer, (b) tackifying resin, (c) liquid rubber, and (d) phase. It is preferable to contain a solubilizer as a main component.
[0016]
The (A) ABA type styrene-diene block copolymer preferably has a weight average molecular weight of 50,000 to 500,000, and any of those conventionally used in pressure-sensitive adhesives can be used. For example, styrene-isoprene-styrene block copolymer, styrene-butadiene-styrene block copolymer and hydrogenated products thereof can be used.
[0017]
In the hair removal pressure-sensitive adhesive of the present invention, the above-mentioned skin irritation mitigating agent is preferably blended in a proportion of 0.005 to 1.50 parts by weight with respect to 100 parts by weight of component (a) of the pressure-sensitive adhesive. The reason for this is that when the amount of the skin irritation mitigating agent is less than 0.005 parts by weight, the effect of mitigating the skin irritation is small, and when it exceeds 1.50 parts by weight, the increased effect cannot be obtained. .
[0018]
As the above-mentioned (b) tackifying resin, any resin can be used as long as it adheres well to hair and has good hair-trapping properties, but has a resin having a softening point of 50 to 180 ° C and a softening point of 40 ° C or lower. It is preferable to use one containing at least one resin. Examples of the resin having a softening point of 50 to 180 ° C. include natural resins such as dammar gum rosin and wood rosin, polymerized rosin, partially hydrogenated rosin, glycerin ester rosin, modified rosin such as pentaerythritol ester rosin, and these Derivatives, terpene resins, terpene phenol resins, xylene resins, petroleum resins, hydrogenated resins thereof, and styrene resins can be used. Examples of the resin having a softening point of 40 ° C. or lower include a low polymer of a xylene resin, a low polymer of a terpene resin, a low polymer of a terpene phenol resin, a methyl ester of rosin and a methyl ester of hydrogenated rosin, Examples include rosin triethylene glycol ester and hydrogenated rosin triethylene glycol ester, rosin polyethylene glycol ester and hydrogenated rosin polyethylene glycol ester.
[0019]
When (b) a tackifying resin is used, as described above, a resin having a softening point of 50 to 180 ° C. and a resin having a softening point of 40 ° C. or less are used as these resins: 8: 2 to 5 : It is preferable from the point of hair-capturing property to use by the weight ratio of 5.
[0020]
The above-mentioned (c) liquid rubber is blended in order to improve adhesion to the skin surface such as imparting flexibility at low temperature of the pressure-sensitive adhesive. For example, polybutene or liquid isoprene rubber is used. .
[0021]
The (d) compatibilizing agent is blended in order to make the (a) styrene-diene block copolymer compatible and compatible with the (b) tackifying resin and other additive components. is there. If the affinity / compatibility is poor, the performance of the pressure-sensitive adhesive varies, and a sufficient hair removal effect cannot be obtained. As a result of the present inventors' study of this (d) compatibilizing agent, the content of paraffinic hydrocarbons having an aniline point of 90 to 150 ° C. and a specific gravity of 0.79 to 0.90 is 50% by weight or more. The refined oil of (a) does not kill the cohesive force of the styrene domain of the component (a), and the compatibility and compatibility of the compounding agents such as the components (b) and (c) and the skin irritation mitigating agent for the component (a) I found a dramatic improvement.
[0022]
Although the blending ratio of the above-mentioned pressure-sensitive adhesive can be appropriately set according to the usage form, (b) tackifying resin 100 to 400 with respect to 100 parts by weight of ABA type styrene-diene block copolymer. It is preferable to blend in a proportion of 1 part by weight, (c) 1 to 50 parts by weight of liquid rubber, and (d) 5 to 50 parts by weight of a compatibilizer. In addition to the four components (a), (b), (c) and (d), the pressure-sensitive adhesive suitably contains a filler, a colorant, an antioxidant, an anti-aging agent, a stabilizer, a fragrance and the like as necessary. be able to.
[0023]
The hair removal pressure-sensitive adhesive of the present invention is melt-coated on one side of a base material 2 such as PE, PP, PET, or other plastic film, paper, non-woven fabric, slitted to a predetermined size, wound up, and on a roll. The hair removal tape (FIG. 2) is processed, or the release paper 3 is pasted onto the melt-coated paste surface and cut into a predetermined size to be processed into a sheet-like hair removal tape (FIG. 1).
[0024]
【Example】
A skin irritation relieving agent is blended in accordance with Table 2 into an adhesive having the components and blending amounts shown in Table 1, and the hair removal adhesive No. 1-10 were created. Next, a sheet-like hair removal tape sample as shown in FIG. 1 was prepared according to the conditions shown in Table 3 using these hair removal adhesives and other company's comparative products. When these samples were subjected to the adhesion performance test in Table 4 and the sensitivity test in Table 5, the results in Table 6 and Table 7 were obtained, respectively.
[0025]
[Table 1]

[0026]
[Table 2]

[0027]
[Table 3]

[0028]
[Table 4]

[0029]
[Table 5]

[0030]
[Table 6]

[0031]
[Table 7]

[0032]
As can be seen from the results shown in Table 6, the hair removal pressure-sensitive adhesive of the present invention had a good pressure-sensitive adhesive performance with a sufficient hair removal effect as a hair removal pressure-sensitive adhesive. Further, in the sensitivity test, as shown in the results of Table 7, the pain at the time of peeling was high and the utility was high.
[0033]
【The invention's effect】
As described above, the hair removal pressure-sensitive adhesive of the present invention has not only a sufficient hair removal effect but also a skin irritation mitigating effect that reduces pain during peeling (at the time of hair removal), and is used for a hair removal tape. It is useful as an adhesive.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of a sheet-like hair removal tape prepared using the hair removal adhesive of the present invention.
FIG. 2 is a perspective view of an example of a roll-like hair removal tape produced using the hair removal adhesive of the present invention.
[Explanation of symbols]
1 Adhesive for hair removal 2 Base material 3 Release paper

Claims (6)

An adhesive for hair removal comprising a skin irritation mitigating agent containing the following (i), (ii), and / or (iii) as an active ingredient in an adhesive, wherein the adhesive is (a) AB -A-type styrene-diene block copolymer, (b) tackifying resin, (c) liquid rubber, and (d) paraffin having an aniline point of 90 to 150 ° C. and a specific gravity of 0.79 to 0.90. A hair removal pressure-sensitive adhesive comprising as a main component a compatibilizing agent that is a paraffin-based refined oil having a hydrocarbon content of 50% by weight or more:
(I) glycyrrhetinic acid;
(Ii) a pyridoxine base glycyrrhetinic acid derivative comprising a stearyl glycyrrhetinate, glycyrrhetinyl stearate, 3-succinyloxyglycyrrhetinic acid disodium, and / or an intermolecular salt of glycyrrhetinic acid and pyridoxine (vitamin B6);
(Iii) A mixture of glycyrrhetinic acid and stearic acid.   (Iii) The adhesive for hair removal according to claim 1, wherein a mixture of glycyrrhetinic acid and stearic acid is mixed in a weight ratio of 1: 1 to 1: 3, respectively.   The adhesive for hair removal according to claim 1 or 2, wherein the skin irritation mitigating agent is blended in an amount of 0.005 to 1.50 parts by weight with respect to 100 parts by weight of component (a) of the adhesive. .   (B) 100-400 parts by weight of tackifying resin, (c) 1-50 parts by weight of liquid rubber, with respect to 100 parts by weight of (a) ABA type styrene-diene block copolymer (D) The hair loss pressure-sensitive adhesive according to claim 1 or 2, which is blended in a proportion of 5 to 50 parts by weight of a compatibilizing agent.   (B) The tackifying resin contains at least one resin having a softening point of 50 to 180 ° C. and at least one resin having a softening point of 40 ° C. or less. For hair removal.   6. The weight ratio of (b) a resin having a softening point of 50 to 180 ° C. and a resin having a softening point of 40 ° C. or lower in the tackifying resin is 8: 2 to 5: 5. For hair removal.

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