JPH06256735A - Production of pressure-sensitive adhesive tape - Google Patents

Abstract

PURPOSE:To obtain the subject tape having low monomer odor and excellent cohesivity, weather resistance, heat-resistance and aging resistance and useful as a permanent bonding material for structural member of automobile, etc., by applying a specific adhesive to a substrate and curing by irradiation with actinic energy ray. CONSTITUTION:This adhesive tape is produced by applying a pressure-sensitive adhesive curable by active energy ray and containing (A) 100 pts.wt. of a vinyl monomer composed mainly of an alkyl (meth)acrylate such as n-butyl (meth) acrylate, (B) preferably 0.001-5 pts.wt. of a photopolymerization initiator such as 4-phenoxydichloroacetophenone and (C) preferably 0.5-5 pts.wt. of a thermal polymerization initiator such as 2,2'-azobis(isobutyronitrile) as essential components to a substrate such as releasing paper, irradiating with active energy ray such as ultraviolet rays and preferably heating to effect the curing of the adhesive.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a pressure-sensitive adhesive tape.

[0002]

2. Description of the Related Art Acrylic adhesive tapes or sheets are
It has excellent adhesive properties such as adhesive strength and cohesive strength, and excellent aging resistance such as weather resistance and heat resistance, and is beginning to be used as a permanent bonding agent for various structural members such as automobiles, electric products, and buildings.

As a method for producing the pressure-sensitive adhesive tape, a mixture of an acrylic polymer composed of a monofunctional monomer and a monofunctional monomer is added to a polyfunctional monomer and glass balun or hydrophobic silica as a filler later. A method is known in which a prepared liquid material is applied on a substrate, irradiated with active energy rays, and cured to form a pressure-sensitive adhesive layer.

In this method, viscoelastic stress relaxation is imparted by incorporating the filler as described above, and even if peeling stress concentrates on the end portion, the stress is caused by the followability of the entire adhesive tape or sheet. To increase the peel strength.

However, not only the peel strength but also the peel holding strength under a constant load in the peel direction is required as the permanent bonding agent, and in order to increase the peel holding strength, the monofunctional monomer constituting the adhesive tape or sheet is used. It is necessary to increase the coagulability of the polymer by polymerizing it.

In the photopolymerization method as described above, it is theoretically known that the molecular weight of the polymer produced is inversely proportional to the square root of the product of the concentration of the photopolymerization initiator and the light intensity. The amount of residual monomer is proportional to the concentration of the photopolymerization initiator.

[0007]

However, the tape produced by the above method is accompanied by an unpleasant odor due to the residual monomer component at the conventional amount of the photoinitiator used, and the residual monomer is inevitable. On the contrary, if the photoinitiator is increased for the purpose of reduction, the molecular weight of the cured product is lowered, and the peel strength and the peel holding strength are lowered.

As described above, it is difficult to reduce the amount of residual monomer (reduce the monomer odor and improve the working environment) while maintaining the peel strength and the peel holding strength.

[0009]

Means for Solving the Problems The inventors of the present invention have made earnest studies in view of the above situation, and as a result, applied an active energy ray-curable pressure-sensitive adhesive containing a thermal polymerization initiator onto a substrate, It has been found that when a pressure-sensitive adhesive tape is manufactured by a method of irradiating with active energy rays and curing, the tape obtained therefrom has no unpleasant odor derived from a monomer component.

In the present invention, the active energy ray refers to an energy ray capable of curing the active energy ray-curable pressure-sensitive adhesive, and is an electron ray such as α-ray, β-ray, γ-ray, neutron ray and accelerating electron beam. Examples include radiation, radiation and ultraviolet rays.

The dose for ionizing radiation is 0.5 to 50.
It can be used in the range of Mrad, but about 1 to 10 Mrad is preferable. In the case of ultraviolet rays, it is about 180-480 nm.
In the above wavelength range, a high pressure mercury lamp, a fluorescent lamp, etc. are suitable as a generation source.

The active energy ray-curable pressure-sensitive adhesive of the present invention comprises a vinyl-based monomer (A) containing a (meth) acrylic acid alkyl ester as a main component, a photopolymerization initiator (B), and
It contains a thermal polymerization initiator (C) as an essential component.

In the present invention, there is provided an alkyl (meth) acrylate.
Vinyl-based monimer containing kill ester as the main component (A)
Is the general formula CH₂= CHCOOR or CH₂= C
(CH ₃) COOR (where R is C_Four~ C₁₂The alkyl
(Meth) acrylic acid alkyl ester having a group),
It is composed of a vinyl-based monomer copolymerizable with this.

Examples of alkyl (meth) acrylates include n-butyl (meth) acrylate and (meth) acrylate.
2-Ethylhexyl acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate and the like are used.

As the vinyl-based monomer copolymerizable with the above-mentioned (meth) acrylic acid alkyl ester, acrylic acid, methacrylic acid, itaconic acid, maleic acid, acrylamide, acrylonitrile, methacrylonitrile, N-substituted acrylamide, Hydroxyethyl acrylate, N-vinylpyrrolidone, N-vinylcaprolactam, N-methylol acrylamide, hydroxyethyl methacrylate and the like are used.

The vinyl-based monomer (A) is a mixture of (meth) acrylic acid alkyl ester as a main component and a vinyl-based monomer copolymerizable therewith. The weight ratio thereof is not particularly limited, but is usually 1 to 60 parts by weight per 100 parts by weight of the former.

As the photopolymerization initiator (B), any of known and conventional ones can be used, and examples thereof include 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, 4-t-butyl-trichloroacetophenone and di. Ethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-
Isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 4- (2-hydroxyethoxy)
-Phenyl (2-hydroxy-2-propyl) ketone,
Acetophenone-based photopolymerization initiators such as 1-hydroxycyclohexyl phenyl ketone and 2-methyl- [4- (methylthio) phenyl] -2-morpholinopropane-1, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether , Benzoin isobutyl ether, benzyl dimethyl ketal, and other benzoin-based photopolymerization initiators, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4′-methyldiphenylsulfide , Benzophenone-based photopolymerization initiators such as 3,3′-dimethyl-4-methoxybenzophenone, thioxanthone, 2-methylthioxanthone, 2-
Chlorthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, 2,
Thioxanthone-based photopolymerization initiators such as 4-diisopropylthioxanthone, and α-aloxime ester, acylphosphine oxide, methylphenylglyoxylate, benzyl, 9,10-phenanthrenequinone, which are special ones other than the above. There are camphorquinone, dibenzosuberone, 2-ethylanthraquinone, 4 ′, 4 ″ -diethylisophthalophenone, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone and the like.

These photopolymerization initiators are preferably added in an amount of 0.001 to 5 parts by weight with respect to 100 parts by weight of the vinyl-based monomer. By this addition amount, the molecular weight of the produced polymer can be adjusted for each application. When the amount added is in the above range, the photopolymerization initiator is not consumed in the initial stage of the reaction, so that the reaction does not proceed to the end point and a large amount of the monomer does not remain, and the polymerization reaction rate is also appropriate. Since the cured adhesive (produced polymer) also has a high molecular weight, the so-called cohesive force represented by peel strength and peel holding strength is also good, and the adhesive tape or sheet is well balanced.

As the thermal polymerization initiator (C), any known and commonly used one can be used, but for example, 2,2'-
Azobis (isobutyronitrile) (hereinafter AIBN),
Azo-based polymerization initiators represented by 2,2′-azobis (2,4-dimethylvaleronitrile) and 2,2′-azobis (2-methylbutyronitrile), for example, benzoyl peroxide (hereinafter, BPO) , T-butylperoxy-2-ethylhexanoate, t-butylperoxypivalate, t-butylperoxybenzoate, lauroyl peroxide, acetyl peroxide, di-t-butyl peroxide, dicumyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, methyl ethyl ketone peroxide,
There are peroxide type polymerization initiators represented by diisopropyl peroxycarbonate and the like.

These thermal polymerization initiators (C) are preferably 0.5 to 5 parts by weight, when 1 part by weight of the photopolymerization initiator (B) is used.

Further, in the present invention, the activation energy of the thermal polymerization initiator (C) is important in order to activate the thermal polymerization initiator by utilizing the heat generated by photopolymerization. Generally, in the case of producing adhesive tapes and sheets, after applying an active energy ray-curable adhesive containing a vinyl-based monomer (A) as a main component on a base material, irradiation with active energy rays causes polymerization. The surface temperature of the pressure-sensitive adhesive tape and the sheet usually heats up to 50 to 130 ° C., though it depends on the thickness of the tape.

As described above, there is usually sufficient heat generation to activate the thermal polymerization initiator (C). However,
It is preferable to appropriately use various photopolymerization initiators (B) to confirm how much active energy can be ensured by photopolymerization, and to select and use the corresponding thermal polymerization initiator.

In the present invention, since the heat generated by the activation energy released by photopolymerization is utilized, the activation energy of the thermal polymerization initiator (C) is largely related to the odor of the product and the molecular weight of the produced polymer. come. When the heat generated by photopolymerization alone is insufficient for thermal polymerization, the tape or sheet can be thermally polymerized after the photopolymerization.

According to the knowledge of the present inventors, the thermal polymerization initiator (C) has a 10-hour half-life temperature of about 50 to 100.
The thing of about degree C is preferable. The thermal polymerization initiator is generally added and mixed at all stages of coating or injecting the resin composition onto a release paper, a release mold, etc., but the vinyl monomer is partially polymerized by an active energy ray. Even if added at that time, polymerization can be carried out without problems if the reaction temperature is controlled so that the thermal polymerization initiator is not activated.

Further, in the present invention, it is preferable to blend a polyfunctional monomer as a crosslinking agent together with the photopolymerization initiator (B) and the thermal polymerization initiator (C). This photo-crosslinking agent is added to 5 parts by weight with respect to 100 parts by weight of the vinyl monomer.
It is preferable to mix the compound in an amount of not more than 1 part by weight, because suitable adhesive properties are exhibited by adjusting the composition and molecular weight of the vinyl-based monomer (A), and the cohesive force at high temperature becomes good.

That is, the addition of the crosslinking agent improves the cohesive force at high temperature. As a timing of adding such a crosslinking agent, it is general to add and mix the resin composition before applying or injecting the resin composition to a release paper, a release mold or the like.

Examples of such a crosslinking agent include hexanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate. , Pentaerythritol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, other epoxy acrylates,
Examples include polyester acrylate and urethane acrylate.

Further, in the present invention, a commonly used compounding agent such as a thickener, a thixotropic agent and a filler is added to the liquid material of the vinyl monomer (A) to which the various compounding agents described above are added. You may. Thickeners include carboxymethyl cellulose, rhamzan gum, acrylic rubber, and the like, and thixotropic agents include colloidal silica, polyvinylpyrrolidone, sepiolite, and the like.
Further, as a method of solving these effects by another means, for example, there is a method of preliminarily partially polymerizing the vinyl-based monomer (A) with an active energy ray or the like.

Examples of the filler include inorganic hollow bodies such as glass balun, alumina balun and ceramic balun, organic spherical bodies such as nylon beads, acrylic beads, silicon beads and urethane beads, vinylidene balun chloride,
Examples include organic hollow bodies such as acrylic balun, short fibers such as polyester, rayon, and nylon.

The liquid material of the vinyl-based monomer (A) containing the (meth) acrylic acid alkyl ester as the main component, which is prepared as described above, is usually an inert gas such as nitrogen gas in order to remove dissolved oxygen. Will be purged with. Also,
To solve similar problems, for example, phenyl diisodecyl phosphite, trisisodecyl phosphite,
A compound having a deoxidizing effect such as stannous octylate may be added.

Then, this liquid material is applied or poured onto a release paper, a release mold or the like, or applied or impregnated into a base material such as a plastic film, paper, cellophane, cloth, non-woven fabric or metal foil. To be done. Also preferred is a method of coating the release paper and then covering the surface with a release-treated PET film to prevent oxygen damage.

Ultraviolet rays are often used as the active energy rays, and the ultraviolet ray lamp used for the irradiation of the ultraviolet rays at this time has a wavelength matched to the characteristic absorption wavelength of the photopolymerization initiator (B).

The wavelength of ultraviolet rays is usually 300 to 400.
Those having a spectral distribution in the nm region are used, and examples thereof include fluorescent chemical lamps, black light fluorescent lamps (Toshiba Denshi Co., Ltd.), high pressure mercury lamps, metal halide lamps, and the like.

Conventionally, in order to reduce the amount of residual monomer, it is general to increase the amount of the polymerization initiator. In this case, the increased amount of the polymerization initiator lowers the molecular weight of the produced polymer, so that the cohesive force and the like are increased. There was a problem such as a decrease.

However, according to the method of the present invention, in the initial polymerization stage, the photopolymerization initiator (B) is activated by the irradiation of ultraviolet rays to start only the photopolymerization reaction, and after the high molecular weight compound is synthesized, The thermal polymerization initiator (C) is activated for the first time due to the heat generated by the polymerization reaction, the residual monomer is polymerized by the photopolymerization and the thermal polymerization, and the polymerization reaction is substantially completed without the monomer remaining. Therefore, the molecular weight of the produced polymer is not lowered by increasing the amount of the initiator, and the odor of the product can be remarkably improved while maintaining the physical properties.

[0036]

EXAMPLES Examples and comparative examples of the present invention will be shown below.
Needless to say, the present invention is not limited to these examples.

Example 1 To 900 g of 2-ethylhexyl acrylate and 100 g of acrylic acid, 5 g of 2-hydroxy-2-methyl-1-phenylpropan-1-one (photopolymerization initiator, Darocure 1173 manufactured by Ciba-Geigy) was added and stirred. While purging with nitrogen while partially polymerizing with a fluorescent chemical lamp, a mixture of a vinyl-based monomer and an acrylic-based polymer (1) having a polymerization rate of 15% and a viscosity of 15000 cps / 25 ° C. as a main component (meth) acrylic acid alkyl ester. Is obtained.

To 100 g of this mixture (1), 1.0 g of polyethylene glycol diacrylate [crosslinking agent, NK ester APG-700 manufactured by Shin-Nakamura Chemical Co., Ltd.], 0.5 g of Darocur 1173, t-butylperoxy-
0.5 g of 2-ethylhexanoate [thermopolymerization initiator, Perbutyl O manufactured by NOF CORPORATION] was added and well stirred to obtain a mixture (2).

This mixture (2) was siliconized 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 10 minutes to obtain an adhesive sheet (1).

Example 2 The pressure-sensitive adhesive sheet (2) was left at 100 ° C. for 1 hour while the pressure-sensitive adhesive sheet (1) was sandwiched between PET films.
Got

Comparative Example 1 NK ester APG-7 was added to 100 g of the above mixture (1).
This mixture (3) was obtained by adding 1.0 g of 00 and 0.5 g of Darocur 1173 and stirring well to obtain a mixture (3).
To a siliconized 75 μm PET film.
After coating to a thickness of mm, it is covered with a PET film.
Using a fluorescent chemical lamp for this, the light intensity is 5 mW /
Irradiation was carried out at 10 cm ² for 10 minutes to obtain an adhesive sheet (3).

Comparative Example 2 An adhesive sheet (4) was obtained by leaving the adhesive sheet (3) sandwiched in a PET film at 100 ° C. for 1 hour.

Comparative Example 3 NK ester APG-7 was added to 100 g of the above mixture (1).
1.0 g of 00 and 1 g of Darocur 1173 are added and well stirred to obtain a mixture (4) This mixture (4) is coated on a siliconized 75 μm PET film to a thickness of 1.2 mm and then coated with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 6 minutes to obtain an adhesive sheet (5).

Comparative Example 4 An adhesive sheet (6) was obtained by leaving the above adhesive sheet (4) sandwiched in a PET film at 100 ° C. for 1 hour.

Example 3 NK ester APG-7 was added to 100 g of the above mixture (1).
00 2.0 g, Darocur 1173 0.5 g, glass balun [manufactured by Fuji Davison Co., Ltd. density d = 0.4
0 g / cm ³ ] 30% by volume, 0.15 g of perbutyl O
Add and stir well to obtain mixture (5).

This mixture (5) was siliconized 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 10 minutes to obtain an adhesive sheet (7).

Example 4 An adhesive sheet (8) was obtained by leaving the adhesive sheet (7) sandwiched in a PET film at 100 ° C. for 10 minutes.

Example 5 NK Ester APG-7 was added to 100 g of the above mixture (1).
00 g, 0.5 g of Darocur 1173, 30% by volume of glass balun, 0.15 g of AIBN, and well stirred to obtain a mixture (6).

This mixture (6) was siliconized 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 10 minutes to obtain an adhesive sheet (9).

Example 6 The pressure-sensitive adhesive sheet (9) was left for 10 minutes at 100 ° C. while being sandwiched between PET films to obtain a pressure-sensitive adhesive sheet (10).

Example 7 NK ester APG-7 was added to 100 g of the above mixture (1).
00 2.0 g, Darocur 1173 0.5 g, glass balun 30% by volume, 2,2'-azobis (2,4-
Dimethyl valeronitrile) [V- manufactured by Wako Pure Chemical Industries, Ltd.
65] Add 0.15 g and stir well to obtain a mixture (7).

This mixture (7) was treated with silicon 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 10 minutes to obtain an adhesive sheet (11).

Example 8 The pressure-sensitive adhesive sheet (11) was left in a PET film at 100 ° C. for 10 minutes to obtain a pressure-sensitive adhesive sheet (12).

Comparative Example 5 NK ester APG-7 was added to 100 g of the above mixture (1).
00 g (2.0 g), Darocur 1173 (0.5 g), and glass balun (30% by volume), and mixed well (8)
To get

This mixture (8) was siliconized 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This is irradiated with a fluorescent chemical lamp at a light intensity of 5 mW / cm ² for 6 minutes,
The product was left in a PET film at 100 ° C. for 10 minutes to obtain an adhesive sheet (13).

Example 9 NK ester APG-7 was added to 100 g of the above mixture (1).
00 (1.0 g), 2,4,6-trimethylbenzoyldiphenylphosphine oxide (BASF's Lucillin TPO) 0.1 g, V-65 (0.15 g), glass balun 30% by volume, and well stirred to mix (9). To get

This mixture (9) was siliconized 7
A 5 μm PET film is coated to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 1 mW / cm ² for 10 minutes to obtain an adhesive sheet (14).

Example 10 An adhesive sheet (15) was obtained by leaving the adhesive sheet (14) sandwiched in a PET film at 80 ° C. for 20 minutes.

Comparative Example 6 NK ester APG-7 was added to 100 g of the above mixture (1).
00 g (1.0 g), Lucillin TPO (0.1 g) and glass balun (30% by volume) are added, and the mixture (10) is well stirred.

This mixture (10) is coated on a siliconized 75 μm PET film to a thickness of 1.2 mm and then covered with a PET film. This is irradiated with a fluorescent chemical lamp at a light intensity of 1 mW / cm ² for 6 minutes,
The adhesive sheet (16) was obtained by leaving it in a PET film for 20 minutes at 80 ° C.

Example 11 990 g of isononyl acrylate and 10 g of acrylic acid
1 g of 1-hydroxycyclohexyl phenyl ketone (IRGACURE 184 manufactured by Ciba-Geigy Co., Ltd.) was added, nitrogen purging was carried out while stirring, and partial polymerization was carried out with a fluorescent chemical lamp. Polymerization rate 10%, viscosity 25000 cps /
A mixture (2) of a vinyl-based monomer containing an alkyl (meth) acrylate at 25 ° C. as a main component and an acrylic polymer is obtained.

To 100 g of this mixture (2), 0.5 g of 1,6-hexanediol diacrylate, 0.1 g of Irgacure 184, 0.1 g of V-65 and 30% by volume of glass balun were added and stirred well. A mixture (11) is obtained.

This mixture (11) is coated on a siliconized 75 μm PET film to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 0.5 mW / cm ² for 10 minutes to obtain an adhesive sheet (17).

Example 12 An adhesive sheet (18) was obtained by leaving the above adhesive sheet (17) sandwiched in a PET film at 80 ° C. for 20 minutes.

Comparative Example 7 To 100 g of the above mixture (2), 0.5 g of 1,6-hexanediol diacrylate, 0.15 g of Irgacure 184, and 30% by volume of glass balun were added, and the mixture (12) was stirred well. obtain.

This mixture (12) is coated on a siliconized 75 μm PET film to a thickness of 1.2 mm and then covered with a PET film. This was irradiated with a fluorescent chemical lamp at a light intensity of 0.5 mW / cm ² for 6 minutes, and allowed to stand at 80 ° C. for 20 minutes while being sandwiched between PET films to obtain an adhesive sheet (19).

Tables 1 to 3 below show the measurement results of the residual monomer amounts of the pressure-sensitive adhesive sheets (1) to (19). In addition,
The measurement of the residual monomer amount and the measurement of the holding power are as follows.

(1) Measurement of residual monomer amount Gas chromatograph (GC-7 having FID detector)
A, manufactured by Shimadzu Corporation). As a measurement sample, 2 g was taken from a solution prepared by dissolving 100 mg of the adhesive tape in 5 g of ethyl acetate, and 2 g of this solution and 2 ml of the internal standard solution.
And were mixed and adjusted.

(2) Measurement of holding power A sample was 25 mm × 25 mm (area), 2.0 kg roller was pressed and reciprocated once with a 2.0 kg roller, and the holding power was measured.
After standing at 3 ° C. for 30 minutes, a load of 1.0 kg was applied in the shearing direction at 80 ° C., and the time until falling was measured.

[0070]

[Table 1]

[0071]

[Table 2]

[0072]

[Table 3]

[0073]

[Table 4]

As can be seen by comparing Example 1 with Comparative Examples 1 and 3, the combined use of the thermal polymerization initiator results in 80
It is clear that it is possible to reduce the residual monomer (reduce the monomer odor) while keeping the holding power at ℃. Further, from the comparison between Example 1 and Example 2, when the heating and holding were performed as needed, the residual monomer was further reduced as compared with the case where only the activation energy of the active energy ray irradiation was used (monomer odor). Can be reduced).

[0075]

In the production method of the present invention, a photopolymerization initiator and a thermal polymerization initiator are used in combination to cure an active energy ray-curable adhesive, so that it is not possible to use only a photopolymerization initiator. It is particularly remarkable that it is possible to obtain an excellent pressure-sensitive adhesive tape and sheet that has both the cohesive force represented by peeling strength and holding force, which has not been achieved, and the reduction of odor of the obtained pressure-sensitive adhesive tape and sheet. Produce an effect.

Therefore, the pressure-sensitive adhesive tape and sheet obtained by the method of the present invention can be applied to various structural members such as automobiles, electric appliances and buildings, as well as interior materials etc. It can be used up to now.

Claims (3)

[Claims] 1. Active energy ray curing comprising a vinyl monomer (A) containing a (meth) acrylic acid alkyl ester as a main component, a photopolymerization initiator (B), and a thermal polymerization initiator (C) as essential components. A method for producing a pressure-sensitive adhesive tape, which comprises applying a mold pressure-sensitive adhesive onto a substrate and irradiating it with an active energy ray to cure it. 2. The method according to claim 1, wherein heat is further applied after the irradiation with active energy rays. 3. An active energy ray-curable pressure-sensitive adhesive,
The composition further contains an acrylic polymer.
The manufacturing method described.