JPH10101527A - Tacky sheet for removing keratin plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tacky sheet for removing keratin plug, capable of removing keratin pieces, sebum, stain, etc., clogging pores of the skin on the top of nose, wings of the nose and the chin, etc. SOLUTION: This sheet uses an organopolysiloxane-based-polymer or a polymer mixture comprising the organopolysiloxane-based polymer. A mixture of the organopolysiloxane-based polymer and a (meth)acrylic acid ester-based polymer is used as the preferable mixture. Preferably, the sheet contains an oil plasticizer such as an animal oil, vegetable oil, mineral oil, ester oil, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to a beautiful skin having a function of removing keratin fragments, sebum, dirt, and the like clogged in the pores of the face, particularly the nose, nose and chin, by the adhesive force of an adhesive. The present invention relates to an adhesive sheet for removing a square plug.

[0002]

2. Description of the Related Art Pack cosmetics are one type of cosmetics and are usually used for removing skin stains such as the face and old stratum corneum. However, since there are countless pores in the skin, fragments of the old stratum corneum (horn pieces) are mixed with sebum secreted from the skin or mixed with dirt and clogged in the pores to form so-called horn plugs. When a keratotic plug is formed in the pores, the skin surface becomes black and rough, and in some cases, skin disorders such as acne may occur.

[0003] Conventionally, such keratotic plugs and sebum on the face,
As a method of removing dirt, a liquid component that is applied to the face to raise dirt, then is washed off or wiped off, or a liquid component that is dried to form a film is applied to the face and dried to form a film. There is a packing method to peel off. In such a packing method, since the liquid component is applied by a finger, there are problems that the finger is stained and that it takes time to wash off or remove the film.

[0004] Face-attached packs in which a hydrogel pressure-sensitive adhesive layer is formed on a base sheet such as a non-woven fabric have also been proposed, but these types of packs focus on the moisturizing effect. However, it is difficult to sufficiently remove even the stains on the pores only by removing the stains on the skin surface.

[0005]

Therefore, the present inventors have found that the problems of the above-described conventional cosmetics for removing plugs such as contamination of the fingers, time-consuming removal of the plugs, and removal of the coating film. Painful when peeled off, as a result of intensive studies to eliminate that the plug can not be removed sufficiently, forming a pressure-sensitive adhesive layer consisting of a specific composition on one side of a flexible support The present inventors have found that the use of such a pressure-sensitive adhesive sheet-like pack agent makes it possible to easily remove the face, particularly the nose plug and the horn plug around the nostril, thereby completing the present invention.

[0006]

That is, a pressure-sensitive adhesive sheet comprising a flexible support and a pressure-sensitive adhesive layer formed on one surface of a flexible support, wherein the pressure-sensitive adhesive layer contains an organosiloxane-based polymer or the polymer. It is intended to provide a pressure-sensitive adhesive sheet for removing a square plug, comprising a polymer mixture.

[0007] In addition, the pressure-sensitive adhesive sheet for removing keratotic plugs contains at least one oily plasticizer selected from animal and vegetable oils, mineral oils, ester oils, and the like, so that keratotic plugs having an excellent keratotic plug removal effect can be exhibited. It can provide an adhesive sheet for use.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The support used for the pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention is not particularly limited as long as it has flexibility. Any material can be used as long as it is used as a medical patch. Specifically, such as a polystyrene-based thermoplastic elastomer film, polyethylene, polypropylene, ethylene / (meth) acrylic acid copolymer, ethylene / (meth) acrylic acid copolymer, ethylene / vinyl acetate copolymer, etc. Polyolefin-based films, ether-based or ester-based polyurethane-based films, polyester-based films, polyvinyl chloride-based films, etc., and woven and non-woven fabrics, knitted fabrics, papers made of various plastic materials, and laminates of these films,
A laminate of a fabric or paper, a laminate of a film and a fabric, or the like can be used.

The thickness of the support to be used is arbitrary depending on the material. However, from the viewpoint of maintaining flexibility, the thickness is usually 15 to 250 μm, preferably about 30 to 100 μm when a plastic film is used as the support. 50-500μ when using cloth or paper such as cloth or non-woven fabric as a support
m, preferably about 100 to 300 μm. In addition,
When fabric or paper is used as the material of the support as in the latter case,
Since the absolute thickness is difficult to measure, the basis weight is 8 to 200 g / m.
It is preferable to use about ^two . When the thickness of each support is less than the lower limit, the self-supporting property and the flexibility of the finally obtained pressure-sensitive adhesive sheet for removing a plug of the present invention itself are poor (so-called lack of rigidity), and the sticking operability is low. It becomes worse and the problem that the adhesive surfaces stick to each other during the sticking operation is likely to occur. On the other hand, when the thickness of the support exceeds the upper limit, the sticking operability is improved, but the flexibility becomes poor, causing an uncomfortable feeling at the time of sticking, and the followability to the curved surface of the skin becomes poor.

[0010] Also, a single-layer resin sheet formed of a polyolefin-based resin or a polyvinyl chloride-based resin among the above-mentioned supports, and a fabric or an ethylene-vinyl acetate copolymer sheet laminated on one or both sides of the single-layer resin sheet. By using one selected from the group consisting of a laminated sheet and a fabric, the flexibility to follow irregularities and curved surfaces of the skin becomes better when the pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention is applied to the skin surface. Is preferred.

In the present invention, the above-mentioned polyolefin resin does not only mean an olefin resin such as polyethylene or polypropylene, but also a small amount of ethylene such as ethylene / vinyl acetate copolymer or ethylene / acrylic acid copolymer. Resins obtained by copolymerizing monomers are also included.

When a plastic film is used among the above-mentioned supports, it is preferable to use a nonporous sheet from the viewpoint of mechanical strength. It is also one of the preferable embodiments to use a porous structure since it is easy to adhere to uneven parts such as a nose and the like, and discomfort at the time of sticking is reduced. As a method for forming a porous structure, for example, a method of mechanically perforating such as perforation processing, punching, or a method of blending a powder filler such as calcium carbonate or kaolin into a sheet, and stretching the sheet. Can be used.

It is effective that the support of the present invention is a transparent or white sheet so that the keratotic plug removed from the skin surface can be easily recognized. Furthermore, the back surface of the support may be subjected to various surface treatments such as printing and release treatment.

In the present invention, the pressure-sensitive adhesive layer formed on one side of the support for sticking to the skin is usually 15 to 100 μm,
Preferably, it is formed with a thickness of 20 to 60 μm. The pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention needs to have the property that keratotic plugs such as small noses can be removed with a short application time when used.

Accordingly, in the present invention, an organosiloxane-based polymer or a polymer mixture containing the polymer is used as the pressure-sensitive adhesive to satisfy such required characteristics. When a polymer mixture is used as the pressure-sensitive adhesive, it is preferable to use a mixture of an organosiloxane polymer and a (meth) acrylate ester polymer, and in particular, a mixture containing 10% by weight or more of the organosiloxane polymer. It is preferred to use. When the content of the organosiloxane-based polymer is less than 10% by weight, the skin adhesion (skin adhesion) is hardly sufficiently exhibited in a short time when applied to the skin surface, and the removability of the keratin plug is reduced. Show a tendency to.

That is, the organosiloxane polymer used in the present invention has a surface tension that is specifically lower than that of other polymers, and has good adhesion (wetting property) to uneven portions such as pores on the skin surface. Therefore, it is presumed that the adhesion to the skin upon application for a short time is improved, and the effect of removing the keratotic plug is enhanced.

In the present invention, the pressure-sensitive adhesive layer to be attached to the skin is not only formed from the above-mentioned organosiloxane polymer, but also from a mixture of an organosiloxane polymer and a (meth) acrylate polymer. it can. Since the (meth) acrylate polymer easily absorbs the sebum at the application site, the (meth) acrylate-based polymer exerts the effect of improving the adhesiveness to the nostrils and the like. In this case, if the organosiloxane-based polymer is contained in the mixture in an amount of 10% by weight or more, the skin adhesion (wetting property) is improved.

As the organosiloxane polymer used in the pressure-sensitive adhesive sheet of the present invention, specifically, a polymer obtained by dehydrating and condensing a silanol group of an organosiloxane rubber component and a silicone resin in the presence of a condensation catalyst is used. .

As the organosiloxane rubber component, dimethylpolysiloxane having a weight average molecular weight of about 150,000 to 1.5 million, preferably about 200 to 1,000,000 can be used. And those substituted with a vinyl group can be suitably used. Typically, PSA6574 manufactured by General Electric
For example, a mutual condensate of a mixture of an alkylarylpolysiloxane raw rubber and an organopolysiloxane resin represented by, for example, can be used.

As the silicone resin, those having a three-dimensional structure comprising a monofunctional siloxane unit and a tetrafunctional siloxane unit can be used, and have a function of imparting a sticky feeling. Usually, a weight average molecular weight of 1,000 to 30,000,
Preferably, about 3000 to 10000 can be used.

On the other hand, the (meth) acrylate-based polymer which can be mixed with the above-mentioned organosiloxane-based polymer imparts sufficient initial tackiness (tack) to the pressure-sensitive adhesive layer to be adhered to the skin, and provides a paste at the time of peeling. Preventing the remaining and exhibiting the function of a filler by incorporating a crosslinked acrylic polymer, and those whose main component is (meth) acrylic acid alkyl ester, which is relatively easy to adjust the adhesive properties. Used. In particular, it is preferable to use a pressure-sensitive adhesive obtained by copolymerizing an acrylic acid alkyl ester and / or a methacrylic acid alkyl ester as a main component monomer with another copolymerizable monomer.

As the alkyl (meth) acrylate, specifically, the alkyl group has 4 carbon atoms such as butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and tridecyl.
It is preferable to use (meth) acrylic acid alkyl esters having from 13 to 13 linear alkyl groups or branched alkyl groups, and one or more of these can be used.

The alkyl (meth) acrylate is not limited to the above examples, but may have 1 to 1 carbon atoms as long as the adhesive properties are not significantly reduced.
It goes without saying that an alkyl (meth) acrylate having a lower alkyl group of 3 or an alkyl (meth) acrylate having a higher alkyl group having 14 or more carbon atoms may be used in combination.

The copolymerizable monomer which can be copolymerized with the above-mentioned alkyl (meth) acrylate includes at least one unsaturated double bond involved in the copolymerization reaction in the molecule and a carboxyl group ( For example, (meth) acrylic acid, itaconic acid, maleic acid, maleic anhydride, etc., a hydroxyl group (eg, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate), a sulfoxyl group (eg, styrene sulfonic acid) , Allylsulfonic acid, (meth) acrylic acid sulfopropyl ester, (meth) acryloyloxynaphthalenesulfonic acid, acrylamidomethylpropanesulfonic acid, etc.), amino group (for example, (meth) acrylic acid aminoethyl ester, (meth) acrylic acid dimethylamido) Ethyl ester, (meth) acrylic acid tert- butylaminoethyl ester),
Amide group (for example, (meth) acrylamide, dimethyl (meth) acrylamide, N-butylacrylamide,
N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide, etc., an alkoxyl group (for example, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, methoxyethylene glycol (meth) acrylate) ,
Monomers having a functional group on the side chain, such as (meth) acrylic acid methoxydiethylene glycol ester, (meth) acrylic acid methoxypolyethylene glycol ester, (meth) acrylic acid methoxypolyethylene glycol ester, (meth) acrylic acid tetrahydrofurfuryl ester, etc. Can be used. Other monomers that can be copolymerized include, for example, (meth) acrylonitrile, vinyl acetate, vinyl propionate, N-vinyl-
2-pyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, vinylimidazole, vinylcaprolactam, vinyloxazole, vinylmorpholine and the like can be used.

These copolymerizable monomers (functional monomers) can be copolymerized by one kind or two or more kinds. However, adhesiveness and cohesiveness as adhesive properties, and crosslinking of the adhesive layer if necessary. From the viewpoint of reactivity at the time of treatment, it is particularly preferable that at least one of a carboxyl group-containing monomer and a hydroxyl group-containing monomer is an essential component, and other monomers exemplified above are copolymerized as necessary. The copolymerization amount of the copolymerizable monomer is the total amount of the monomers including the alkyl (meth) acrylate,
It can be arbitrarily set so as to be 50% by weight or less, preferably 2 to 40% by weight.

The pressure-sensitive adhesive obtained by mixing the two types of polymers used in the present invention, that is, the polyorganosiloxane-based polymer and the (meth) acrylate-based polymer, is inferior in cohesiveness of the pressure-sensitive adhesive layer depending on the mixing ratio. There is a risk of cohesive failure when peeling from the surface. Therefore, in order to improve the mechanical strength of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer can be subjected to a crosslinking treatment as needed.

As a crosslinking method, physical crosslinking by irradiation such as ultraviolet irradiation or electron beam irradiation, isocyanate compound, organic peroxide, organic metal salt, metal alcoholate, metal chelate compound, polyfunctional compound (polyfunctional compound) Cross-linking treatment using a cross-linking agent such as a functional external cross-linking agent or a polyfunctional internal cross-linking monomer such as diacrylate or dimethacrylate). Among these cross-linking treatments, it is preferable to perform an external cross-linking treatment using an isocyanate-based compound such as a trifunctional isocyanate from the viewpoints of easy adjustment of the cross-linking reactivity and the degree of cross-linking, and handleability. The compounding amount of these crosslinking agents is 10% of the solid content of the adhesive layer.
It is about 0.01 to 1.0 part by weight based on 0 part by weight.

The pressure-sensitive adhesive layer to be adhered to the skin in the pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention has the above-mentioned constitution,
It is composed of an organosiloxane-based polymer having extremely low hydrophobicity and high surface tension, or a mixture thereof with a (meth) acrylate-based polymer having appropriate hydrophobicity and hydrophilicity. When a polymer mixture is used as the pressure-sensitive adhesive layer, these polymers are not completely compatible with each other, and the pressure-sensitive adhesive layer has a so-called micro-layer separation structure. Thus, it has an effective action as an adhesive for removing keratotic plugs.

When the pressure-sensitive adhesive layer is formed on one side of the support, the surface of the support on which the pressure-sensitive adhesive layer is formed may be subjected to a corona discharge treatment or a primer treatment in order to improve the anchoring property with the support. preferable.

The pressure-sensitive adhesive layer in the pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention has the above-mentioned composition. However, in order to reduce skin adhesion and pain when peeled off from the skin surface,
It is preferable to include an oily plasticizer. Such oily plasticizers include olive oil, castor oil, vegetable oils such as jojoba oil, animal oils such as squalane and squalene, mineral oils such as liquid paraffin and process oil, fatty acid esters such as isopropyl myristate and diethyl sebacate, Various liquid emulsifiers and the like can be used. Among these, it is preferable to use at least one selected from animal and vegetable oils, mineral oils, and ester oils. The content of the oily plasticizer is optional depending on the type of the pressure-sensitive adhesive, but is usually in the range of 3 to 40% by weight, preferably about 5 to 30% by weight in the pressure-sensitive adhesive layer. This is preferable because the desired effect is exhibited without adversely affecting the cohesion.

In the present invention, the pressure-sensitive adhesive layer includes:
Compounded with various inorganic fillers such as titanium oxide, calcium carbonate, silica, kaolin, montmorillonite, bentonite, saponite, and other common cosmetics and packs such as various pigments, dyes, ultraviolet absorbers, plant extracts, vitamins, etc. May be blended.

In order to prevent contamination of the surface of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive sheet of the present invention is preferably coated with a separator until the pressure-sensitive adhesive layer is used. Then, the sheet is removed after the square plug is sufficiently adhered to the target portion. In addition,
In using the pressure-sensitive adhesive sheet of the present invention, it is preferable to perform punching in advance in accordance with the size and shape of a portion to be stuck from the viewpoint of ease of use.

The pressure-sensitive adhesive sheet for removing a plug according to the present invention comprises:
Instead of being punched into a piece in advance as described above, it may be manufactured in a long shape and used as a roll-shaped pressure-sensitive adhesive sheet wound in a roll shape. In this case, it can be used after being cut into an appropriate size according to the application site.

Furthermore, a so-called dry edge portion, in which no pressure-sensitive adhesive layer is formed, may be provided on a part or all of the peripheral portion of the support in the pressure-sensitive adhesive sheet so that the pressure-sensitive adhesive sheet can be easily peeled off after application.

[0035]

EXAMPLES Examples of the present invention will be shown below, and will be described more specifically. In the following text, “part” means “part by weight”.

Example 1 A reaction vessel was charged with 95 parts of isononyl acrylate and 5 parts of acrylic acid together with ethyl acetate as a polymerization solvent, and constantly charged in the presence of 0.2 parts of benzoyl peroxide as a polymerization initiator. A polymerization reaction was carried out by a method to obtain an acrylate polymer. The solid content concentration of the obtained acrylate polymer was 80% by weight.

On the other hand, as the organosiloxane polymer, PSA6 (trade name, manufactured by General Electric) is used.
574 was used.

Next, the organosiloxane-based polymer and the acrylate-based polymer were mixed in a solid content ratio of 3%.
The mixture was mixed at a ratio of 5:65, and the solid content was 3% with toluene.
It was adjusted to a 0% adhesive solution.

The pressure-sensitive adhesive solution thus obtained is applied to a release-treated surface of a separator, one surface of which is treated with a silicone-based release agent, so that the thickness after drying is 35 μm, and the pressure-sensitive adhesive is dried. A layer was formed.

Next, the pressure-sensitive adhesive layer obtained above was
It was transferred to one side of a polyester-based polyurethane film having a thickness of m to prepare a pressure-sensitive adhesive sheet for removing a plug according to the present invention.

Example 2 The procedure of Example 1 was repeated, except that the ratio of the organosiloxane polymer to the acrylate polymer blended in Example 1 was changed to a solid content ratio of 70:30. A pressure-sensitive adhesive sheet for plug removal was prepared.

Comparative Example 1 A pressure-sensitive adhesive sheet for removing a plug was prepared in the same manner as in Example 1, except that the pressure-sensitive adhesive layer was formed only of an acrylic polymer.

Example 3 A pressure-sensitive adhesive sheet for removing a plug according to the present invention was prepared in the same manner as in Example 1, except that the pressure-sensitive adhesive layer was formed of only an organosiloxane-based polymer.

Example 4 A reaction vessel was charged with 65 parts of 2-ethylhexyl acrylate, 30 parts of 2-methoxyethyl acrylate and 5 parts of acrylic acid together with ethyl acetate as a polymerization solvent, and used as a polymerization initiator. In the presence of 0.2 parts of azobisisobutyronitrile, a polymerization reaction is carried out by a conventional method,
An acrylate polymer was obtained. The solid content concentration of the obtained acrylate polymer was 75% by weight.

On the other hand, as the organosiloxane polymer, PSA6 (trade name, manufactured by General Electric Co., Ltd.) is used.
574 was used.

Next, the organosiloxane polymer and the acrylate polymer were mixed in a solid content ratio of 4%.
The mixture was mixed at a ratio of 0:60, and further, 0.3 parts of a polyisocyanate as a cross-linking agent was blended with respect to 100 parts of the solid content of the adhesive, and adjusted to an adhesive solution having a solid concentration of 30% with toluene. .

The pressure-sensitive adhesive solution thus obtained is applied to the release-treated surface of a separator, one surface of which has been treated with a silicone-based release agent, so that the thickness after drying is 35 μm, and then dried and crosslinked. To form a pressure-sensitive adhesive layer.

Next, the pressure-sensitive adhesive layer obtained above was
The pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention was transferred to one side of a thick polyethylene film.

Comparative Example 2 A keratotic plug was removed in the same manner as in Example 1 except that the ratio of the organosiloxane polymer to the acrylate polymer blended in Example 1 was changed to a solid content ratio of 8:92. An adhesive sheet was produced.

Comparative Example 3 40 parts of natural rubber, 100 parts of terpene resin, polybutene 4
A rubber-based pressure-sensitive adhesive containing 0 part as a main component was prepared, and the solid content concentration was adjusted to 30% using toluene as a diluting solvent.

The pressure-sensitive adhesive solution obtained in this way was
On one side of a 0 μm-thick soft vinyl chloride film, it was applied and dried so that the thickness after drying was 35 μm, and then the surface of the pressure-sensitive adhesive layer was covered with a separator and laminated to prepare a pressure-sensitive adhesive sheet for removing square plugs. .

The following tests were conducted on the pressure-sensitive adhesive sheet for removing keratotic plugs obtained in each of the above Examples and Comparative Examples, and the results are shown in Table 1.

<Adhesiveness> Each adhesive sheet was stuck on the nose,
After 30 seconds, it was peeled off and the removability of the horn plug was determined according to the following criteria. ：: It was confirmed that the square plug was removed.

×: The removal of the plug was not confirmed sufficiently.

<Adhesive Remaining> Each adhesive sheet is attached to the nose,
After 30 seconds, the adhesive was peeled off, and the state of the adhesive residue after peeling was determined according to the following criteria. ：: No adhesive residue phenomenon was observed at the sticking site.

×: Adhesive residue phenomenon of the adhesive was observed at the application site.

<Applying Feeling> Each adhesive sheet was attached to the nose,
Uncomfortable feeling until peeling and removing after 30 seconds was determined according to the following criteria. ：: No discomfort was felt during application.

×: A feeling of discomfort was felt during application.

<Pain at Peeling> Each pressure-sensitive adhesive sheet was applied to the nose, peeled and removed after 30 seconds, and the pain at peeling was determined according to the following criteria. ：: I did not feel much pain.

×: Pain was felt.

[0061]

[Table 1]

[0062]

As described above, the pressure-sensitive adhesive sheet for removing keratotic plugs of the present invention has an adhesive layer made of a specific adhesive laminated on one surface of a flexible support. It has excellent skin-following properties and adhesiveness, and can reliably remove keratotic plugs around the face, especially around the head of the nose and the nostril, and has an excellent skin-pleasing effect.

In addition, the pressure-sensitive adhesive sheet of the present invention can remove only keratin plugs without peeling off normal keratin, and thus has the effect of not damaging the skin surface and having little skin irritation.

Claims (5)

[Claims] 1. A pressure-sensitive adhesive sheet comprising a flexible support and a pressure-sensitive adhesive layer formed on one surface of a flexible support, wherein the pressure-sensitive adhesive layer comprises an organosiloxane-based polymer or a polymer mixture containing the polymer. Characteristic adhesive sheet for removing square plugs. 2. The adhesive sheet according to claim 1, wherein the polymer mixture is a mixture of an organosiloxane polymer and a (meth) acrylate polymer. 3. The polymer mixture according to claim 1, wherein the polymer mixture contains at least 10% by weight of an organosiloxane polymer.
The adhesive sheet for removing a square plug according to the above. 4. The pressure-sensitive adhesive sheet according to claim 1, further comprising an oily plasticizer. 5. The pressure-sensitive adhesive sheet according to claim 4, wherein the oily plasticizer is at least one selected from animal and vegetable oils, mineral oils, and ester oils.