JP2002235056A - Masking pressure-sensitive adhesive tape for hair dyeing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a masking pressure-sensitive sensitive adhesive tape for hair dyeing applicable to the skin surface by extreme simple operations, scarcely causing skin irritation without making a hair dye stick to the borders of the hair and without fouling the skin surface during dyeing operation of the hair by using e.g. a hair dye for gray hair, hair color or hair manicure. SOLUTION: This rolled masking pressure-sensitive adhesive tape has an adhesive mass layer formed on one surface of a supporting substrate having flexibility such as a paper substrate or a nonwoven fabric. An organic liquid component is contained in the adhesive mass layer and an acrylic adhesive mass is preferably used as the adhesive mass and is subjected to crosslinking treatment. Chemical crosslinking using an organic peroxide, a polyfunctional isocyanate, a metal chelating compound or a metal alcoholate compound is preferred for the crosslinking treatment. An esterified substance is preferably used as the organic liquid component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking pressure-sensitive adhesive tape for hair dyeing, and more particularly to a hair dye which adheres to and contaminates the skin surface of hair during hair dyeing and hair coloring operations. The present invention relates to a masking pressure-sensitive adhesive tape for dyeing hair to prevent such a phenomenon.

[0002]

2. Description of the Related Art In recent years, hair dyeing has been carried out by men and women of all ages.
It has been widely performed according to the hobbies and preferences of each person. This is because the hair dyeing operation was conventionally generally performed at a hairdresser or the like, but a product that can easily perform hair dyeing at home has been developed and commercialized. it is conceivable that.

[0003] As a dyeing agent used for such hair dyeing, a liquid agent dedicated to hair dyeing such as an oxidative hair dye or an acidic hair dye is usually used. Also, when performing the hair dyeing operation, the hair dye adheres to the skin surface at the time of hair growth and contaminates the skin surface.To prevent this, apply a cream or emulsion as a skin surface protective agent. In fact, the hair dyeing operation is performed after the skin surface of the hairline is covered and protected.

However, when a skin protective agent such as a cream is applied to the skin surface as described above, not only the application operation and the washing operation after hair dyeing are troublesome, but also the hands are contaminated and the hair dye is reliably and reliably. In order to prevent the skin surface from being contaminated, it is necessary to rely on a specialist in a beauty salon or the like. In particular, when dyeing hair at home as recently, such a problem is remarkable.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and can easily protect a skin surface from a hair dye even when dyeing hair in a general household. As a result of examining methods that can be used, it was found that by using an adhesive tape having a specific adhesive layer for masking during hair dyeing, it was found that the skin surface could be easily and reliably protected, and the present invention was completed. .

[0006]

That is, the present invention relates to a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a flexible supporting substrate and wound in a roll, wherein the pressure-sensitive adhesive layer is an organic tape. An object of the present invention is to provide a hair dyeing masking pressure-sensitive adhesive tape which contains a liquid component and is crosslinked.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The supporting base material used for the masking adhesive tape for hair dyeing of the present invention has a function of protecting the skin surface from a hair dye and has an appropriate flexibility to conform to the curved surface of the skin surface. Those having properties are used. In particular,
Cellulose acetate, cellulose film such as ethyl cellulose, polyester film such as polyethylene terephthalate, polyethylene, polypropylene, polyolefin film such as ethylene / propylene copolymer, vinyl acetate-vinyl chloride copolymer, soft polyvinyl chloride, Single films of polyurethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer, Surlyn, polytetrafluoroethylene, and the like, laminated films thereof, various metal foils, metal-deposited films, and the like can be used. In addition, woven fabrics, nonwoven fabrics, woven fabrics and other fabrics made from fibers made of these materials, papermaking, and the like can also be used.

In order to surely prevent the skin surface from being contaminated by the hair dye, a material having an appropriate liquid absorbing property, not a liquid repellent material, should be selected from the above-mentioned supporting materials. It is preferable to use a porous substrate such as a paper substrate or a nonwoven fabric. In other words, with a lyophobic support substrate, there is no problem if a small amount of hair dye adheres, but if a large amount of hair dye adheres, it may flow to the skin surface without being absorbed into the substrate. There is.

[0009] In the case of a film substrate, such a supporting substrate is 0.5 to 500 µm, preferably 2 to 300 µm.
μm, particularly preferably a material having a thickness of 5 to 150 μm. In the case of a porous substrate such as paper or nonwoven fabric, 1 to 100 g / m ² , preferably 10
It is preferable to employ a substrate having a basis weight of 80 g / m ² , particularly preferably 15-50 g / m ² .

In the hair dyeing masking pressure-sensitive adhesive tape of the present invention, the pressure-sensitive adhesive layer formed on one surface of the support substrate comprises:
It easily adheres to the skin surface and protects the skin surface from the hair dye, and it does not cause skin irritation during application.
Further, when peeled from the skin surface, it has an appropriate skin adhesiveness so that the skin surface can be easily peeled without causing pain or keratin damage.

Specifically, the internal cohesive force is reinforced by adding an organic liquid component to give an appropriate flexibility to the pressure-sensitive adhesive layer and performing a crosslinking treatment, instead of using a mere pressure-sensitive adhesive. Use something. That is, by containing the organic liquid component, the pressure-sensitive adhesive layer becomes flexible, and the adhesiveness when applied to the skin surface is improved. Moreover, since it contains an organic liquid component, it has a high affinity for the hair dye used when dyeing hair, and it can absorb and retain the surplus,
It is possible to prevent the hair dye from being contaminated on the skin surface.

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer as described above is not limited as long as it has appropriate compatibility with the organic liquid component and can be held in the pressure-sensitive adhesive layer. Conventionally known adhesives such as an acrylic adhesive, a rubber-based adhesive, a vinyl ether-based adhesive, and a silicone-based adhesive can be used.

Among these pressure-sensitive adhesives, it is preferable to use an acrylic pressure-sensitive adhesive which can be prepared by a polymerization reaction and whose pressure-sensitive properties can be easily adjusted according to the purpose by the amount of the monomer. As such an acrylic pressure-sensitive adhesive, from the viewpoint of ensuring adhesiveness to the skin surface, those using (meth) acrylic acid alkyl ester as a main component monomer are preferable. 1
Acrylic copolymers obtained by copolymerizing 〜50% by weight, preferably 2-40% by weight can be used.

As the alkyl (meth) acrylate, the alkyl group has 2 to 18 carbon atoms, preferably 4 to 4 carbon atoms.
Preferred are 15 (meth) acrylic acid alkyl esters, specifically, (meth) acrylic acid ethyl ester,
One or more of propyl ester, butyl ester, pentyl ester, hexyl ester, heptyl ester, octyl ester, nonyl ester, decyl ester, dodecyl ester, undecyl ester, tridecyl ester and the like can be used. These esters may be linear or branched.

The copolymerizable monomers include carboxyl group-containing monomers such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, and maleic anhydride; styrenesulfonic acid, allylsulfonic acid, and the like. Sulfoxyl group-containing monomers such as sulfopropyl (meth) acrylate, (meth) acryloyloxynaphthalenesulfonic acid, and acrylamidomethylpropanesulfonic acid; and hydroxyl group-containing monomers such as hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate Body, (meth) acrylamide, dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-
Amide group-containing monomers such as methylol (meth) acrylamide and N-methylolpropane (meth) acrylamide; amino acids such as aminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, and tert-butylaminoethyl (meth) acrylate Group-containing monomer, alkoxyalkyl group-containing monomer such as methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, methoxyethylene glycol (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, methoxydiethylene glycol (meth) Acrylate, methoxypolyethylene glycol (meth) acrylate, alkoxy group-containing monomer such as methoxypolypropylene glycol (meth) acrylate, (meth) acrylonitrile, vinegar Vinyl, vinyl propionate, may be used either or two or more of such vinyl monomers such as vinyl pyrrolidone. Among these, a carboxyl group-containing monomer or a hydroxyl group-containing monomer, a monomer containing an alkoxyl group or an ether group, from the viewpoint of easy adjustment of a crosslinking point and an adhesive property at the time of a crosslinking treatment. It is preferred to use a body.

Further, the pressure-sensitive adhesive layer according to the present invention comprises:
When composed mainly of an acrylic copolymer,
It is preferable to use an esterified product as the organic liquid component. Since the esterified product has good compatibility with the acrylic copolymer and the esterified product is present on the surface of the pressure-sensitive adhesive layer moderately, it is most suitable to be used for the hair dyeing application of the present invention.

The esterified product is typically a monobasic or polybasic acid having 8 to 20 carbon atoms and 14 to 14 carbon atoms.
An esterified product of a branched alcohol having 20 and / or an unsaturated fatty acid or an unsaturated branched acid having 14 to 20 carbon atoms and an alcohol having a valency of 4 or less is used.

The former esterified compound having 8 to 2 carbon atoms
The esterified product of 0 monobasic acid or polybasic acid and a branched alcohol having 14 to 20 carbon atoms is a component that uniformly dissolves in the pressure-sensitive adhesive layer and improves the wettability in which the pressure-sensitive adhesive layer adheres to the skin surface. . If the number of carbons is outside the above range, not only the above effects of the esterified product will not be sufficiently exerted, but also the compatibility with the acrylic copolymer will be deteriorated, and a blooming phenomenon may occur.

As the former esterified product,
Specifically, isostearyl laurate, isocetyl myristate, octyldodecyl myristate, isostearyl palmitate, isocetyl stearate, octyldodecyl oleate, diisostearyl adipate, diisocetyl sebacate, trioleyl trimellitate,
One or two or more triisocetyl trimellitates can be blended.

Further, the latter esterified product of an unsaturated fatty acid or unsaturated branched acid having 14 to 20 carbon atoms and an alcohol having a valency of 4 or less as an esterified product is uniformly dissolved in the adhesive layer and adhered to the skin surface. It is a component that improves the adhesiveness of the agent layer. If the number of carbons is outside the above range, not only the above-mentioned effects of the esterified product will not be sufficiently exerted, but also the compatibility with the acrylic copolymer will deteriorate, and a blooming phenomenon may occur.

As the latter esterified product,
Specifically, unsaturated fatty acids such as myristoleic acid, oleic acid, linoleic acid, linolenic acid, isopalmitic acid and isostearic acid or unsaturated branched acids, ethylene glycol, propylene glycol, glycerin, trimethylolpropane, pentaerythritol , Or one or two or more esterified compounds composed of an alcohol having a valency of 4 or less such as sorbitan.

When the above two types of esterified products are used alone or in combination with each other in an acrylic copolymer subjected to a cross-linking treatment described below, the compounding amount is based on 100 parts by weight of the acrylic copolymer. The total amount of the esterified product is adjusted to 30 to 100 parts by weight, preferably 30 to 80 parts by weight. When the amount of the esterified compound is less than 30% by weight, the wettability of the pressure-sensitive adhesive layer to the skin surface may be insufficient. May bloom from the layer and contaminate the skin surface.

Since the above esterified product has an unsaturated bond, it may be oxidized and degraded by oxygen in the atmosphere to cause a change in physical properties, thereby failing to exhibit desired properties. It is preferable to mix an antioxidant in the pressure-sensitive adhesive layer.

The pressure-sensitive adhesive layer of the present invention contains an organic liquid component as described above. However, since the pressure-sensitive adhesive layer is sometimes plasticized and the internal cohesive force is excessively reduced, the pressure-sensitive adhesive is subjected to a crosslinking treatment. It is important to provide the layer with adequate shape retention.

As a method for crosslinking the pressure-sensitive adhesive layer, a chemical compound using a crosslinking agent such as an organic peroxide, an isocyanate compound, an organic metal salt, a metal alcoholate compound, a metal chelate compound, an epoxy compound or a primary amino compound is used. Cross-linking and physical cross-linking by irradiation with ionizing radiation can be performed.However, from the viewpoint of easy adjustment of the degree of cross-linking, ease of compounding, and pot life, organic peroxides and polyfunctional isocyanate compounds It is preferable to perform a chemical crosslinking treatment using a metal chelate compound or a metal alcoholate compound. Among these, it is particularly preferable to use a polyfunctional isocyanate compound or a metal chelate compound.

By cross-linking the pressure-sensitive adhesive layer as described above, the acrylic copolymer in the pressure-sensitive adhesive layer is insolubilized in a solvent. In order to impart an appropriate internal cohesion to the pressure-sensitive adhesive layer, the above-mentioned organic liquid component is subjected to a crosslinking treatment so as to insolubilize 15 to 80% by weight, preferably 35 to 65% by weight of the acrylic copolymer. Even when a relatively large amount of is contained, a reduction in cohesive force does not occur and an appropriate skin adhesion can be maintained.

The masking pressure-sensitive adhesive tape for hair dyeing of the present invention has the above-mentioned constitution. If necessary, a coloring agent such as a tackifier, a filler, a pigment and a dye, and a fragrance may be contained in the pressure-sensitive adhesive layer. An additive such as an antioxidant can be appropriately compounded. Further, the adhesive tape for masking of the present invention is used in the form of a product in which a long tape is wound into a roll shape, and a necessary amount is cut out according to the size and length of the skin surface to be attached at the time of hair growth. You do it.

Further, the pressure-sensitive adhesive layer in the hair dyeing masking tape of the present invention is used by covering and temporarily attaching the exposed surface thereof with a separator whose surface has been subjected to a release treatment such as silicone treatment or fluorine treatment. Up to this, contamination of the pressure-sensitive adhesive layer can be prevented. In addition, since the adhesive tape of the present invention is formed by winding a long one in a roll shape,
When a pressure-sensitive adhesive tape is wound by applying a release agent such as a silicone-based release agent to the surface of the support substrate opposite to the surface on which the pressure-sensitive adhesive layer is formed, the pressure-sensitive adhesive layer comes into contact with the back surface of the support substrate.
As a result, there is no need to use a separator, which is more effective in terms of economy and the like.

An example of the use of the hair dyeing masking adhesive tape of the present invention will be described below.

First, a necessary amount of adhesive tape is cut out and applied according to the size and length of the skin surface (forehead, etc.) to be applied to the hairline of hair.

Next, the hair is dyed with a desired hair dye according to a predetermined method. At this time, even if the hair dye adheres to the vicinity of the hairline, since the skin surface is masked with the adhesive tape of the present invention, the adhesive tape may be peeled off after the hair dyeing operation, and no contamination of the skin surface is required. It does not occur. Thereafter, the hair dyeing operation is completed by washing the dyed hair.

When the hair is dyed using the masking pressure-sensitive adhesive tape for hair dyeing of the present invention, the hair dye is not particularly limited, and commercially available hair dyes such as white hair dye and hair color can be used. Hair dyes can be broadly classified into those that permanently dye hair and those that temporarily dye hair. The adhesive tape of the present invention can be used with any hair dye.

As the permanent hair dyeing component, an oxidative hair dye can be typically used, and phenylenediamines or salts thereof, diaminopyridines or salts thereof, diaminoanthraquinones, polyphenols, aminophenols or the like can be used. Examples thereof include salts and the like, and specific examples include the following compounds.

5-amino-o-cresol, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, 1-amino-4-methylaminoanthraquinone, 3,3'-iminodiphenol, hydrochloric acid 2 , 4-Diaminophenoxyethanol, 2,4-diaminophenol hydrochloride, toluene-2,5-diamine hydrochloride, nitro p-phenylenediamine hydrochloride, p-phenylenediamine hydrochloride, N-phenyl-p-phenylenediamine hydrochloride, m-phenylene hydrochloride Diamine, o-aminophenol, N-phenyl-p-phenylenediamine acetate, 1,4-diaminoanthraquinone, 2,6-diaminopyridine, 1,
5-dihydroxynaphthalene, toluene-2,5-diamine, toluene 3,4-diamine, nitro-p-phenylenediamine, p-aminophenol, p-nitro-o
-Phenylenediamine, p-phenylenediamine, p-
Methylaminophenol, picramic acid, sodium piclamate, N, N'-bis (4-aminophenyl)-
2,5-diamino-1,4-quinonediimine, 5- (2
-Hydroxyethylamino) -2-methylphenol,
N-phenyl-p-phenylenediamine, m-aminophenol, m-phenylenediamine, 5-amino-sulfate
o-cresol, 2-amino-5-nitrophenol sulfate, o-aminophenol sulfate, o-chloro-p-sulfate
Phenylenediamine, 4,4'-diaminodiphenylamine sulfate, 2,4-diaminophenol sulfate, toluene-2,5-diamine sulfate, nitro-p-phenylenediamine sulfate, p-aminophenol sulfate, p-nitro-o-sulfate Phenylenediamine, p-nitro-m-phenylenediamine sulfate, p-phenylenediamine sulfate, p-sulfate
-Methylaminophenol, m-aminophenol sulfate, m-phenylenediamine sulfate, catechol, pyrogallol, phloroglucin, gallic acid, resorcin and the like.

On the other hand, as the temporary hair coloring component, an acidic hair coloring agent is typically used, and Red No. 221, Red No. 225,
Red 226, Red 228, Red 505, Orange 20
No. 3, orange 204, orange 401, orange 403, yellow 204, yellow 205, yellow 401, yellow 404
And at least one dye selected from No. 405, Yellow No. 405, Blue No. 201 and Blue No. 403.

[0036]

The hair dyeing masking pressure-sensitive adhesive tape of the present invention has the above-mentioned constitution, so that it can be easily dyed on the skin surface only by sticking it to the skin surface of the hair during hair dyeing operation. The hair can be prevented from adhering, and the operation of washing a cream or the like after hair dyeing, which is required for applying a conventional cream or emulsion, is also unnecessary. Therefore, the present invention has a remarkable effect in eliminating the trouble in the hair dyeing operation at home.

Further, since a specific pressure-sensitive adhesive layer containing an organic liquid component is used, there is little skin irritation to the skin surface to be stuck, and a hair dye can be absorbed. It also has the effect of preventing the attached hair dye from flowing over the skin surface beyond the masking tape.

[0038]

EXAMPLES Examples of the present invention will be described below in more detail, but the present invention is not limited thereto, and various applications can be made without departing from the technical concept of the present invention. It is possible. In the following text, “parts” means “parts by weight”, and “%” means “% by weight”.

Example 1 95 parts of 2-ethylhexyl acrylate, 5 of acrylic acid
Was polymerized by ordinary solution polymerization to prepare an acrylic copolymer. Subsequently, 50 parts of sorbitan trioleate and 0.1 part of a trifunctional isocyanate (trade name: Coronate L, manufactured by Nippon Polyurethane Co.) were added to 100 parts of the obtained acrylic copolymer.
Six parts were blended to prepare an adhesive solution.

The obtained pressure-sensitive adhesive solution is applied to a treated surface of a separator having one surface subjected to silicone treatment to a thickness of 4 after drying.
It was applied to a thickness of 5 μm and dried at 130 ° C. for 5 minutes to form an adhesive layer.

Next, a polyester non-woven fabric (having a basis weight of 25 g / m ² ) was stuck to the surface of the obtained pressure-sensitive adhesive layer to prepare a pressure-sensitive adhesive sheet, which was heated at 60 ° C. for 3 days and aged. A masking tape for dyeing hair of the present invention was produced.

Comparative Example 1 A masking adhesive tape for dyeing hair was prepared in the same manner as in Example 1 except that sorbitan trioleate was not used.

Comparative Example 2 A masking adhesive tape for dyeing hair was prepared in the same manner as in Example 1 except that the crosslinking agent was not used.

Example 2 A polyester nonwoven fabric used in Example 1 was replaced with a polyester film (thickness: 100 μm).
A masking adhesive tape for hair dyeing was produced in the same manner as in Example 1.

Example 3 A masking adhesive tape for dyeing hair was prepared in the same manner as in Example 1 except that the acrylic copolymer used in Example 1 was replaced with a rubber adhesive mainly composed of isoprene rubber. Produced.

Example 4 The sorbitan trioleate used in Example 1 was
A masking adhesive tape for hair dyeing was produced in the same manner as in Example 1 except that dioctyl phthalate was used.

Example 5 The acrylic copolymer used in Example 1 was obtained by copolymerizing a monomer mixture consisting of 70 parts of 2-ethylhexyl acrylate, 25 parts of 2-methoxyethyl acrylate, and 5 parts of acrylic acid. A masking adhesive tape for dyeing hair was prepared in the same manner as in Example 1 except that the obtained acrylic copolymer was used instead.

The masking pressure-sensitive adhesive tape for hair dyeing obtained in each of the above Examples and Comparative Examples was evaluated for the insolubilization rate (gel fraction) of the acrylic polymer, skin adhesion, skin irritation,
The adhesive residue and masking property were evaluated by the following methods, and the results are summarized in Table 1.

<Insolubilization Ratio> About 1 g of the pressure-sensitive adhesive layer was sampled from the pressure-sensitive adhesive tapes prepared in each of Examples and Comparative Examples, and its weight (W ₀ ) was measured accurately. Next, each sample was immersed in ethyl acetate for 4 days to extract ethyl acetate-soluble components. The insoluble matter (gel content) as a residue is separated by filtration,
After drying, the weight (W ₁ ) was measured. The insolubilization rate (gel fraction) was calculated by the following equation.

[0050]

(Equation 1)

<Skin Adhesive Strength> The pressure-sensitive adhesive tapes prepared in the respective Examples and Comparative Examples were cut to a width of 19 mm and affixed to the forearms of volunteers, and after 8 hours, a speed of 300 mm / min in a 90 ° direction. Peeling was performed at a high speed, and the adhesive force at that time was measured.

<Skin irritation> In the above-mentioned skin adhesion test, after peeling for 8 hours, when peeled off, skin irritation was evaluated according to the following criteria. 〇: There is slight irritation, or slight irritation. Δ: Pain felt somewhat painful. ×: Pain felt painful. XX: Very strong pain is felt.

<Glue residue> In the above skin adhesion test, 8
After the time pasting, when peeled, by the following criteria,
The adhesive residue on the adhered skin surface was evaluated. 〇: No adhesive residue at all. Δ: Adhesive residue occurs at the end. ×: Adhesive residue occurs in an area of 1/3 or more.

<Masking Property> The pressure-sensitive adhesive tape prepared in each of the above Examples and Comparative Examples was cut into a long roll having a width of 19 mm and affixed to the forehead of the hairline of volunteers. Next, with a commercially available acid hair dye (a hair dye having black 401 / red 206 / brown 210 as a main component),
The hair dyeing operation was performed in the usual way. After the hair dyeing operation and the hair washing operation were completed, the adhesive tape attached to the forehead was peeled off, and the state of hair dye adhering to the skin surface (forehead) during hair dyeing and after peeling off the adhesive tape was visually observed. In addition, a commercially available masking cream containing an oil component was applied to the forehead of the hairline as a control. The criteria are as follows. ：: No hair dye was observed on the skin surface of the forehead. Δ: Some adhesion of the hair dye was observed on the skin surface of the forehead, but the attached hair dye could be removed by rubbing the skin surface during washing. X: The hair dye was considerably adhered to the skin surface of the forehead, and the hair dye adhered could be removed by rubbing the skin surface during shampooing, but it took time.

[0055]

[Table 1]

As is clear from the results shown in Table 1 above, the masking adhesive tape for dyeing hair of the example product has no skin irritation or adhesive residue, and is excellent in masking performance. In the case of a cream for masking as a control, although the masking performance is appropriate, it has difficulty in operability.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09J 133/06 C09J 133/06

Claims (6)

[Claims] 1. A pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a flexible support base material and wound into a roll, wherein the pressure-sensitive adhesive layer contains an organic liquid component and is crosslinked. A masking adhesive tape for dyeing hair, characterized in that it is made. 2. The masking adhesive tape for dyeing hair according to claim 1, wherein the supporting substrate is a paper substrate or a nonwoven fabric. 3. The masking pressure-sensitive adhesive tape for dyeing hair according to claim 1, wherein the pressure-sensitive adhesive layer mainly comprises an acrylic pressure-sensitive adhesive. 4. The pressure-sensitive adhesive layer comprises a mixture of an acrylic copolymer and an esterified product chemically treated with a crosslinking agent selected from organic peroxides, polyfunctional isocyanate compounds, metal chelate compounds and metal alcoholate compounds. The masking adhesive tape for hair dyeing according to claim 1, which is crosslinked. 5. An esterified product of a monobasic acid or polybasic acid having 8 to 20 carbon atoms and a branched alcohol having 14 to 20 carbon atoms, and / or 14 to 20 carbon atoms.
The masking pressure-sensitive adhesive tape for hair dyeing according to claim 1, which is an esterified product of an unsaturated fatty acid or an unsaturated branched acid of the above and an alcohol having a valency of 4 or less. 6. 15 to 80% by weight of the acrylic copolymer
The masking pressure-sensitive adhesive tape for dyeing hair according to claim 1, wherein is insolubilized.