JPS6068989A - Transferrable pressure-sensitive adhesive tape or sheet - Google Patents

Abstract

PURPOSE:To continuously provide a pressure-sensitive adhesive layer in a predetermined pattern on an object of transfer, by laminating a light-nonreactive separator on the surface of a light-reactive pressure-sensitive adhesive layer of a main body of a tape or sheet. CONSTITUTION:A light-nonreactive releasing agent layer 3a is provided on one side of a transparent base 2, while the light-reactive pressure-sensitive adhesive layer 4 is provided on the other side through a light-reactive releasing agent layer 3b, and the light-nonreactive separator 5 is laminated on the surface of the adhesive layer 4. The separator 5 is constituted of a base member 6 and a light-nonreactive releasing agent layer 7. An original is placed on the releasing agent layer 3a, and the laminate is irradiated with light, whereby an exposed part of the adhesive layer 4 is hardened and brought into reaction with the releasing agent layer 3b, and is bonded to the layer 3b. The laminate is adhered to the object through the adhesive layer 4 while releasing the separator 5, the adhesive layer a predetermined part of which is hardened is released together with the base 2, whereby the unhardened pressure-sensitive adhesive layer in a predetermined pattern is transferred onto the surface of the object.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a pressure-sensitive 1. This invention relates to a transferable (transferable) pressure-sensitive adhesive tape or sheet that can transfer an adhesive layer to an adherend in a pattern.

Conventionally, an adherend is often used by bonding an adherend to another adherend. In this case, it is necessary to punch out the double-sided pressure-sensitive adhesive tape or sheet using a mold with a predetermined shape depending on the shape of the adherend, and if the shape of the adherend is complex, it takes time to mold the mold. Therefore, it has the disadvantage that it is difficult to apply.

Therefore, when bonding adherends together, the inventors used pressure-sensitive welding, which can be easily used even when adhering adherends with complex shapes, by using a mold as described above. This invention was made with the aim of providing a tape or sheet.

In other words, the present invention has a configuration in which the tape or sheet main body is provided with a non-photoreactive release agent layer on one side of a transparent support and a photoreactive pressure-sensitive adhesive layer on the other side via a photoreactive release agent layer. 2. The photoreactive release layer 1iH1i reacts with the photoreactive pressure sensitive adhesive layer upon irradiation with light;
The present invention relates to a special sheet in which a non-photoreactive separator is bonded to the surface of the photoreactive pressure-sensitive adhesive layer of the tape or sheet main body.

In the transferable pressure-sensitive adhesive tape or sheet of the present invention, with the separator attached to the tape or sheet main body, the non-photoreactive release agent layer side of the tape or sheet main body is provided with a coating according to the shape of the adherend. When an original image of a predetermined pattern is placed and irradiated with light, the light-reactive pressure-sensitive adhesive layer corresponding to the translucent part of the original image hardens and reacts with the adjacent light-reactive release agent layer, bonding with the adhesive layer in this area. loses its adhesive properties, but the photoreactive adhesive layer maintains its adhesive properties in areas where light is blocked by the original image, so that a predetermined pattern of adhesive portions is formed in the adhesive layer.

The pressure-sensitive adhesive tape or sheet on which the adhesive portion of a predetermined pattern has been formed is then pressure-bonded to a predetermined adherend after peeling off the separator, and then when the transparent support is peeled off, the photoreactive The cured portion of the adhesive layer is peeled off, and a predetermined pattern of the pressure-sensitive adhesive layer is transferred onto the adherend.

According to the transferable pressure-sensitive adhesive tape or sheet of the present invention, a pressure-sensitive adhesive layer having an arbitrary complicated pattern can be easily formed on an adherend without using a mold or the like. Moreover, after forming a predetermined pattern of adhesive parts continuously on the tape or sheet with a separator by irradiation with light, this tape or sheet is wound into a roll and used to form a tape or sheet. Continuously without winding up, the separator is peeled off and the adhesive is crimped onto the adherend.
By continuously peeling off the transparent support, etc.,
A predetermined pattern of pressure sensitive adhesive layers can be continuously formed on an adherend.

In addition, since the above-mentioned pressure-sensitive adhesive tape or sheet has a separator attached to the pressure-sensitive adhesive layer surface of the main body of the tape or sheet, this has good results in workability when forming the patterned adhesive portion. It also effectively prevents the pressure-sensitive adhesive layer from detaching from the transparent support and being damaged during this process. That is, when such a separator is not provided, the workability of forming a 7N11 turn is impaired due to the adhesiveness of the adhesive layer, and the patterning work is performed by placing this type of tape on a suitable release body. In this case, depending on the type of mold release body, there is a risk that the adhesive layer may be partially transferred onto the mold release body. This adhesion is caused by the fact that a photoreactive release agent layer is interposed between the pressure-sensitive adhesive layer and the transparent support in the tape or sheet body, which lowers the anchoring ability of the adhesive layer to the transparent support. There is a reason.

As described above, in the present invention, the above-mentioned C/-, + router exhibits a unique function and effect different from that of the Senof Rake for general pressure-sensitive adhesive tapes.

Since this separator is non-photoreactive, there is no risk that it and the photoreactive pressure-sensitive adhesive layer will harden into one body during patterning, and when applied to the adherend, the tape or sheet itself It can be peeled off without any problem.

The transparent support used in this invention is not particularly limited as long as it is a colored or colorless sheet or film that transmits light, such as a polyvinyl chloride sheet or film, a polyolefin sheet or film (ethylene-vinyl acetate copolymer), etc. Examples include a sheet or film made of a combination or a saponified product thereof), a polyester sheet or film, or a composite sheet (or film) made by laminating a plurality of these films.

The release agent that is coated and dried on one side of the transparent support to form a non-photoreactive release agent layer has, for example, the general formula: (where R' is hydrogen or a methyl group, R' is hydrogen,
monovalent alkyl group, aryl group or alkenyl group,
11 is an integer from 5 to 500) and has at least three silicon-bonded hydrogen atoms in one molecule, or the general formula; The main component is a diorganopolysiloxane having silicon-bonded hydroxyl groups at both ends represented by a hydrocarbon group (an integer from 1.00 to 15,000), or a mixture of the above two types, and a mixture of the above two types. Examples of curing catalysts for polysiloxane include silicone release agents containing acids, alkalis, amines, organic gold salts, and the like.

The amount of this curing catalyst can be increased or decreased as appropriate depending on the desired curing speed, but it is usually in the range of 0.1 to 10 parts by weight per 100 parts by weight of polyorganosiloxane, which is the main component. good.

In addition, as a release agent that can be used in addition to the silicone-based release agent described in j) ij, long-chain alkyl (meth)acrylate (
Copolymers of alkyl groups with 12 to 28 carbon atoms) and (meth)acrylic acid, copolymers of the aforementioned long-chain alkyl (meth)acrylates with (meth)acrylonitrile, long-chain alkyl isocyanates (with alkyl groups of Carbon number 12-28
) with polyvinyl alcohol or polyacrylic acid, or a reaction product between a long-chain alkyl isocyanate similar to the above and a partially saponified ethylene-vinyl acetate copolymer.

These various peeling agents are appropriately selected and used depending on the desired peel strength and the weighing frequency of the transparent support used.

A photoreactive release agent is coated on the other side of the transparent support provided with the non-photoreactive release agent layer described in IJij on one side and dried to form a photoreactive pressure-sensitive adhesive layer. The above photoreactive peel:
t111. The agent is made by blending the same stripping agent as described above with a photopolymerizable compound and, if necessary, a photosensitizer. It is capable of reacting with and curing the photoreactive pressure sensitive adhesive layer provided.

The photopolymerizable compound described in r>ij is a polyfunctional compound having at least one, preferably two or more, methacryloyl group or acryloyl group as a double bond that polymerizes in the molecule, for example, 1・4-Butylene glycol di(meth)acrylate, J・6-hexane glycol di(meth)acrylate, neopentyl glycol di(
[meth]acrylate, polyethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)
Acrylate, tetramethylolmethanetetra (meth)
Monomers such as acrylate or epoxy acrylate-1.
, urethane-modified acrylate, oligomers such as oriconister acrylate, and two or more of these may be used in combination as necessary.

The mixing ratio of this photopolymerizable compound and the above-mentioned separately listed agent is usually 1:99 to 50:50 by weight.

The photosensitizer is not particularly limited as long as it accelerates the photopolymerization reaction of the photopolymerizable compound described above, but examples include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, α-methyl Benzoin, anthraquinones such as 2-chloroanthraquinone, benzophenone% l]-
Examples include benzophenones such as chlorobenzophenone and 1]-dimethylaminobenzophenone, and sulfur-containing compounds such as diphenyl disulfide and tetramethylthiuram disulfide.

The photosensitizer is usually used in an amount of 0.05 to 20 parts by weight based on 100 parts by weight of the photopolymerizable compound described in 1]ij.

The above-mentioned peeling agent 141 [agent T and the above-mentioned photoreactive peeling P (([agent is applied to one side and the other side of the transparent support, respectively)
The coating is coated and dried to a thickness in the range of 0.01 to 100 μm to form a non-photoreactive m1 agent layer and an O-photoreactive release agent layer.

The tape or sheet main body of the present invention has a structure in which a photoreactive pressure-sensitive adhesive is further coated on the photoreactive release agent layer side and dried to provide a photoreactive pressure-sensitive adhesive layer. The photoreactive pressure-sensitive adhesive used here includes a photopolymerizable compound, a base polymer (referred to as a base polymer, and an adhesive), a base polymer having a photodimerizable functional group, and, if necessary, a photosensitizer. (hereinafter referred to as B photoreactive pressure sensitive adhesive).

As the photopolymerizable compound in the A photoreactive pressure sensitive adhesive described in i'iIJ, the same photopolymerizable compounds as those exemplified in the photoreactive release agent described in aIJ are used.

In addition, base polymers can be divided into those that have adhesive properties themselves and those that exhibit the necessary adhesive properties by blending 1) a photopolymerizable compound in item 0; 1) Examples of the four types Examples include (meth)acrylic acid alkyl ester polymers in which the alkyl group has 1 to 12 carbon atoms, (meth)acrylic acid alkyl esters and (meth)acrylic acid, 2-hydroxyethyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, styrene, vinyl acetate,
A binary or ternary copolymer formed by copolymerizing an unsaturated compound such as (meth)acrylonitrile with (meth)acrylic acid, maleic acid, itaconic acid, etc. as necessary (a polymer formed by crosslinking using a crosslinking agent) Examples of the latter include saturated Alternatively, unsaturated polyester resin, polybutyral resin, etc. may be mentioned.

The blending ratio of the photopolymerizable compound and the base polymer is 8
0:20 to 10:90 preferably 70:30 to 30 near 0 (each ratio is 771i1), and the above compound or 8
If the amount exceeds 0% by weight, light irradiation of the photoreactive pressure-sensitive adhesive layer 1)
It is undesirable because the cohesiveness of ij is poor and adhesive extrusion to the side surfaces occurs, and it is also undesirable when it is less than 10% by weight because sufficient curing cannot be obtained.

The photosensitizer is not particularly limited as long as it accelerates the photopolymerization reaction of the light distribution polymerizable compound, and the same ones as exemplified in the above-mentioned photoreactive release agent layer can be used. Such a photosensitizer is added in an amount of 0.05 to 20% by weight, preferably 0.5 to 10% by weight based on the total amount of the photopolymerizable compound and base polymer. .

Next, the water-use polymer having a photodimerizable functional group in the photoreactive pressure-sensitive adhesive B has two or more functional groups such as hydroxyl group, chloromethyl group, epoxy group, carboxyl group, maleic anhydride group in the molecule. It can be obtained by attaching a photodimerizable photosensitive group to a polymer having the following properties. The polymer having the functional group 13iJ is not particularly limited as long as it has film-forming ability, but acrylic polymers are preferably used.

Among the 1j "" archetype combinations, those having a hydroxyl group are:
2-Hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, monoester of polyethylene glycol and (meth)acrylic acid, ethylene glycol or polyethylene glycol mono-bi-ether, propylene glycol t Tahaho IJ propylene glycol mono A multicomponent copolymer obtained by copolymerizing 99 to 70% by weight of vinyl ether and one or more other unsaturated monomers can be mentioned.

Those having a chloromethyl group include monomers such as vinyl chloroacetate, 290 loethyl vinyl ether, and 2-chloroethyl acrylate, or 1 to 30% by weight of homopolymers thereof, and one or more other unsaturated monomers. 99~7゜01''j] 1% copolymerized copolymer.

Monomers 1 to 3 having an epoxy group include glycidyl methacrylate, chrycidyl acrylate, etc.
0% and one or more other unsaturated substances:
ii. A multicomponent copolymer obtained by copolymerizing 99 to 70% of 1% by weight is prepared.

Those having carboxyl groups include 1 to 30% by weight of carboxyl group-containing monomers such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, allyl acetic acid, and one or more other unsaturated monomers. 99-70
Also, for those having maleic anhydride groups, 1 to 30% by weight of maleic anhydride and 99 to 70% by weight of one or more other unsaturated monomers are copolymerized. Examples include multi-component copolymers.

As the photodimerizable photosensitive group to be introduced into the above-mentioned polymer, a cinnamoyl group and its related groups can be exemplified. In order to introduce such a photosensitive group, the above-mentioned polymer may be mixed with cinnamate, α-cyano-cinnamate, p-azidocinnamate, β-furyl acrylate, β-styryl acrylate. ,
An ester such as α-cyano-β-styrylacrylic acid ester.

Other photosensitive groups include benzalacetophenone, styrylpyridinium, stilbene, α-phenylmaleimide (N-chloromethyl-〇-phenylmaleimide, N-2-hydroxyethyl-〇-phenylmaleimide, etc.! II''), 771-helix, coumarin, cyclopropene, benzophenone, and the like.

In order to introduce the photodimerizable photosensitive group into the polymer,
Taking the cinnamoyl group as an example, the following methods can be used.

1) Condensation reaction of cinnamic acid chloride is performed on the hydroxyl groups of the polymer.

2) React the chloromethyl group of the polymer with the cinnamate.

3) Addition reaction of cinnamic acid to the epoxy groups of the polymer.

4) Addition reaction of chrycidyl cinnamate to the carboxyl group of the polymer.

5) Addition reaction of cinnamic acid hydroxyethyl ester to maleic anhydride groups of the polymer.

In the above reaction, it is necessary to determine the proportions of the polymer and the cinnamic acid compound so that two or more photosensitive groups, ie, cinnamoyl groups, are introduced into the polymer molecule. Other photosensitive groups can also be introduced into the polymer by known methods.

The base polymer having a photodimerizable functional group obtained as described above can contain photosensitizer 7i1j as necessary. Such photosensitizers include (but are not limited to) those that promote the crosslinking reaction of the base polymer, such as C, 5-nitroacenaphthene, 5-nitrofluorene, etc. polynuclear aromatic 21-porous compounds, aromatic ketone compounds such as N-methyl-2-benzoylnaphthothiazoline, tetranuclear aromatic quinones such as 1,2-benzanthraquinone, and 1,9-benzanthrone. You can list various types. This photosensitizer is added in an amount of 0.05 to 20 weight, or 111%, relative to the base polymer.

A or B photoreactive pressure-sensitive welding obtained as above
Depending on the purpose, other compounding agents can be added to the i agent as appropriate. Examples of compounding agents include polymerization inhibitors that prevent thermal polymerization during production and reactions during storage, such as hydroquinone, hydroquinone monomethyl ether, tert-methylcatechol, p-benzoquinone, and 2,5-terl.
:-Butylnohydroquinone, phenothiazine, etc., pigments for coloring or decoration such as zinc white, yellow lead, red red iron, dyes such as toluidine red, phthalocyanine blue, phthalocyanine green, other metal powders, glass peas, glass flakes In addition, tackifying resins such as xylene resins may be used for the purpose of improving adhesion to the surface of the adherend.

In addition, this photoreactive pressure-sensitive adhesive has sufficient adhesive properties,
A cross-linking agent that can react with active hydrogen in the water-side polymer for the purpose of thermal cross-linking in the heat-drying process in order to provide sufficient film-forming ability when coated on the photoreactive release agent layer and dried. may be used.

Such crosslinking agents include tolylene-2,4-diisocyanate, tolylene-2,6-diisocyanate, diphenylmethane-4,4-diisocyanate-1, naphthylene-1,5-diincyane+, trimethylolpropane and tolylene diisocyanate. 1=3 (molar ratio) with isocyanate
Adducts, incyanate group-containing compounds such as reaction products of polyhydric alcohols such as polyethylene glycol or polypropylene glycol and tolylene diisocyanates, neopentyl glycol diglycidyl ether, trimethylolpropane polyglycidyl ether, bisphenol-based epoxy resins, etc. epoxy group-containing compound, trimethylolpropane tris(2-aziridinylpropionate), 1,1'-(4-methyl-111-
Compounds containing an aziridinyl group, such as phenylene)-bis-3,3-aziridinyl urea, 1-(hexamethylene)-bis-3,3-aziridinyl urea, and ethylenebis(2-aziridinylpropionate), etc. One or more of these can be used.

The amount of the crosslinking agent used is in the range of 0.1 to 15 parts by weight based on 100 parts by weight of the base polymer in the photoreactive pressure sensitive adhesive A or B. If it is less than 0.1 part by weight, the expected effect cannot be obtained. First, if the amount exceeds 15 parts by weight, the adhesive layer becomes hard and its adhesive properties deteriorate.

Apply the photoreactive pressure sensitive adhesive configured as above to the photoreactive sheet 11 side with a dry thickness of 1 to 100.
The tape or sheet main body of the present invention is applied to the stomach by applying it so that it becomes a pnt and heating and drying it.

The transferable pressure-sensitive adhesive tape or sheet of the present invention has a structure in which a non-photoreactive separator is further bonded to the surface of the photoreactive pressure-sensitive adhesive layer of the tape or sheet body. The separator is generally formed by providing a non-photoreactive release agent layer similar to that in the tape or sheet body on a transparent or opaque base material,
This peeling layer is bonded to the surface of the photoreactive pressure-sensitive adhesive layer with the seeding agent layer inside.

The transparent or opaque base material constituting the separator is paper or polyethylene laminate paper.

Examples include various plastic sheets (or films) mixed with fillers or pigments.

The drawing shows an example of the transferable pressure-sensitive adhesive tape or sheet of the present invention, in which 1 is a transparent support 2 with a non-photoreactive release agent layer 3a on one side and a photoreactive release agent layer 3b on the other side. A tape or sheet main body is provided with a photoreactive pressure-sensitive adhesive layer 4, and 5 is a non-photoreactive separator bonded to the photoreactive pressure-sensitive adhesive layer 4 of the main body 1; This separator consists of a transparent to opaque group 716 and a non-photoreactive stripping agent layer 7 similar to the stripping agent layer 3a.

When using this transferable pressure-sensitive adhesive tape or sheet, an original image having a predetermined pattern is placed on the non-photoreactive release agent layer of the main body of this tape or sheet, and
This original image is irradiated with sandstorm light for at least 3 seconds, preferably 3 seconds, using a light source such as a high-pressure mercury lamp, ultra-high pressure mercury lamp, metal halide lamp, carbon arc lamp, or xenon lamp, to remove the photoreactive pressure-sensitive adhesive G in the exposed areas. Simultaneously with curing, the adhesive layer in this exposed area and the adjacent reactive release agent layer are reacted and bonded together.

The pressure-sensitive adhesive tape or sheet exposed in this way can be attached to a metal plate, glass plate, wood board, decorative board, plastic board (or sheet, film) while peeling off the separator.
It can be attached to the surface of an adherend, such as a plate-like (or film-like, sheet-like) article made of materials, etc., via a photoreactive pressure-sensitive adhesive layer.

Next, by peeling off the transparent support and the adhesive layer, which has been exposed to light and cured at a predetermined portion, from the adherend, it is possible to transfer a predetermined pattern of the uncured pressure-sensitive adhesive layer onto the surface of the neck body. .

It goes without saying that the other four 'fji' bodies can be pressed and adhered to the pressure-sensitive adhesive layer thus formed on the body to be covered.

In addition, since the uncured photoreactive pressure sensitive adhesive layer is photoreactive, depending on the purpose, it can be made into a cured adhesive layer by irradiating it with light directly or by covering it with a transparent sheet or film. A surface protective layer having a predetermined pattern can also be formed.

Next, examples of this invention will be described. In the following, "part" means part by weight, and "%" means weight %.

Example 1 2-Ethyl-\xyl acrylate 80 parts Ethyl acrylate 15 parts Acrylic acid 5 parts Azobisin butyronitrile 0.15 parts Toluene 200 parts The mixture was charged into a flask, and the temperature of the reaction system was maintained at 65°C without stirring, and polymerization was carried out for about 15 hours. Next, in order to completely polymerize the remaining monomers, the temperature of the reaction system was raised to 80° C. and maintained for 2 hours.

For every 100 parts by weight of the homogeneous solution of the acrylic polymer thus obtained, 1 part by weight of tributoxymethylmelamine was added. Furthermore, to 90 parts of this solution, 10 parts of tetramethylolmethanetetraacrylate, 25 parts of tributoxymethylmelamine, and 0.0 parts of hydroquinone.
1 part was blended and mixed uniformly to obtain a photoreactive pressure sensitive adhesive.

On the other hand, a release agent was obtained by mixing and reacting 100 parts of octadecyl isocyanate and 20 parts of polyacrylic acid (average degree of polymerization 1,000).

Additionally, 10 parts of trimethylolpropane trimethacrylate was added to 90 parts of this release agent and mixed uniformly to obtain a photoreactive release agent.

The above-mentioned release agent was applied to one side of a polyester film having a thickness of 25 parts m so that the thickness after drying was 01 to 0.5p7n, dried at 120 ° C for 3 minutes, and a non-photoreactive release agent was applied. Layers were provided. Next, a photoreactive release agent layer was provided on the other side of this film in the same manner using the photoreactive release agent 141. Next, apply the photoreactive pressure-sensitive adhesive on the photoreactive release agent layer side to a thickness of 30 pyn after drying.
The tape was coated and dried at 120'C for 5 minutes to form a tape body.

On the other hand, a separator was prepared by applying 1) a 5 μm thick release agent of 141L on a polyethylene laminate paper having a thickness of 18 pnt and drying to form a non-photoreactive release agent layer. This separator was attached to the surface of the photoreactive pressure-sensitive adhesive layer of the tape body, and this was wound into a roll to obtain the transferable pressure-sensitive adhesive tape of the present invention.

Example 2 Organohydrodiene polysiloxane emulsion (
5H-8200 manufactured by Toshi Silicone Co., Ltd., solid content 40%) 5
0 parts, an organosiloxane emulsion having a terminal silicon-bonded hydroxyl group (manufactured by Toshi Silicone Co., Ltd. 5M-8)
701, solid content 30%) 100 parts, curing catalyst (manufactured by Dow Corning 5YL-OFF1171A, solid content 50%)
3 parts were blended and stirred to mix uniformly to obtain a release agent.

20 parts of tetramethylolmethanetetraacrylate was added to 80 parts of this release agent, and the mixture was sufficiently stirred and mixed to obtain one photoreactive release agent.

On one side of a soft vinyl chloride film with a thickness of 100 pm,
The above-mentioned release agent was applied so that the thickness after drying was 0.2 μnL, and dried at 130° C. for 3 minutes to provide a non-photoreactive release agent layer. Similarly, a photoreactive release agent layer was provided on the other side of this film using the above photoreactive release agent. Further, on the side of this photoreactive release agent layer, a photoreactive pressure sensitive adhesive similar to that obtained in Example 1 was applied to a thickness of 50 mm after drying.
)tnt and dried at 120° C. for 5 minutes to obtain a tape body. The same separator as in Example 1 was attached to this tape body and then wound up into a roll to obtain a transferable pressure-sensitive adhesive tape of the present invention.

Example 3 2-Hydroxyethyl acrylate-+-5S methyl methacrylate 40 parts 2-ethylhexyl acrylate 60 parts azobisisobutyronitrile o, 2 parts dimethylformamide J
oos (hereinafter referred to as DMF)'' The composition described above was polymerized at 70°C for 4 times, and the DMF solution of the acrylic copolymer was prepared. Next, ij+
1. Acrylic acrylic copolymerization: iF solution 11tk, cinnamic acid chloride 82y, pyridine 4.3 as a dehydrochlorination agent
Me was added and reacted at 50° C., and it was confirmed by IR spectrum that the hydroxyl groups of the acrylic copolymer had become cinnamate esters, thereby obtaining a base polymer having a photo-difluorescent functional group.

5 parts of 5-nitroacenaphthene was added to 50 parts of this base polymer and mixed uniformly to obtain a photoreactive pressure-sensitive adhesive. A tape body was produced in the same manner as in Example 2, except that this adhesive was used in place of the adhesive on the performance type side 2. The heating and drying conditions for applying the adhesive are 100°.
C, for 5 minutes, and the adhesive layer thickness was 15 mm.

After laminating the same separator as in Example 1 to this tape body, it was wound up into a roll to obtain a transferable pressure-sensitive adhesive tape of the present invention.

In order to examine the adhesiveness of the photoreactive pressure sensitive adhesive layer of the transferable pressure sensitive adhesive tapes obtained in Examples 1 to 3 above,
The separator was peeled off and BA stainless steel plate 5US40CP was used as an adherend, and the shear adhesive strength was measured according to JIS-6829, and the 180° peeling adhesive strength was measured according to JIS-Z-1528.

The measurement results are shown in the table below.

The above measurement results show that the photoreactive pressure sensitive adhesive layer of the transferable pressure sensitive adhesive tape of the present invention has excellent adhesive properties.

Next, for each of the pressure-sensitive adhesive tapes obtained in Examples 1 to 3 above, with the separator attached, an original image of a predetermined pattern was placed on the non-photoreactive release agent layer side of the tape body, and a distance of 10 cm from this was placed. Light was illuminated for 1 minute using an IKW high-pressure mercury lamp. Then peel off the separator 1
Press the seed to the BA stainless steel plate as the adherend,
When the transparent support was then peeled off, a good patterned pressure-sensitive adhesive layer could be transferred onto the adherend in each case. Furthermore, by bonding another adherend through this adhesive layer, a composite exhibiting the same good adhesive strength as described above could be obtained.

In addition, in the above light irradiation, when the separator was peeled off from the tape body and the separator was placed on a suitable mold release body and the same operation as above was performed, the adhesive layer was partially missing during this operation. As a result, the desired pattern cannot be transferred onto the adherend in some cases. Further, according to this method, the tackiness of the adhesive layer may cause problems in patterning work.

[Brief explanation of the drawing]

The drawing is a sectional view showing an example of the transferable pressure-sensitive adhesive tape or sheet of the present invention. 1...Tape or sheet body, 2...Transparent support,
3a - Non-photoreactive release agent layer, 3b... Photoreactive release agent layer, 4... Photoreactive pressure-sensitive adhesive layer, 5 Separator. Patent applicant Nitto Electric Industry Co., Ltd.

Claims (1)

[Claims] (11) The tape or sheet body consists of a transparent support with a non-photoreactive release agent layer on one side and a photoreactive pressure-sensitive adhesive layer on the other side via the photoreactive release agent layer. ,
The light-reactive release agent layer reacts with the light-reactive pressure-sensitive adhesive layer by a light agent, and the surface of the light-reactive pressure-sensitive adhesive layer of the tape or sheet body is made non-photoreactive. A transferable pressure-sensitive adhesive tape or sheet made by pasting separators together.