TW200907001A - Adhesive composition, adhesive sheet, adhesive sheet for optics and adhesive sheet for electromagnetic shielding - Google Patents

Abstract

An adhesive sheet that excels in reworkability and is high in the mechanical strength after application. There is disclosed an adhesive agent composition comprising a copolymer resulting from copolymerization of a macromonomer, a monomer having a functional group and an alkyl (meth)acrylate. The adhesive agent layer (15) resulting from sheeting of the adhesive agent composition is flexible, can adhere to an adherend with level differences and, even after stuck once to an adherend and detached, is free from adhesive transfer, thereby excelling in reworkability. Strong adhesion is realized by, after application to an adherend, applying a high load or heating, so that the adherend can be strongly fixed by the adhesive agent layer (15).

Description

200907001 IX. Description of the invention: [Technical field of the invention] The present invention relates to a technical field of an adhesive L without prior art] - generally, used for thin large-scale image display of light: such as electromagnetic wave shielding film or The anti-reflective functional film uses an adhesive to point f. When the optical member is adhered to the image and the hungry body is attached, the adhesive position is corrected, and the adhesive that has been pasted or coated is not visible from the reference. The device is peeled off and then re-attached (re-use). However, when the adhesive is peeled off at the time of re-profit, the adhesive may remain (the transfer of the adhesive adheres to the peeled interface of the adherend and causes contamination by the adherend). Moreover, if the adhesion of the adhesive is too strong, the adhesive will firmly adhere to the adhered body, which causes a problem that it is difficult to peel off. Therefore, it is known that the adhesive is easily peeled off from the adhered body. However, 'the conventional re-peelable adhesive, hi's low adhesion V causes it to cause floating or peeling under heating conditions or under humidified conditions' and fails to meet for example, for The interface between the PDP glass filter and the image display device having the concave or the stepped surface of the adhered body is printed on the glass, and there is room for improvement. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. 2006-348307. After the adhesive is adhered to the adherend, the adhesive can be peeled off from the adhered body without leaving any residue. Even after being adhered to high temperature and high humidity, the adhesive is excellent in durability without floating or peeling, and has a step difference in the adhered body. In the case of this, it is also possible to absorb an adhesive composition and an adhesive sheet which are excellent in step and interface smoothness. In order to solve the problem, the inventors of the present invention have found that an adhesive which is a copolymer obtained by polymerizing three types of monomers described later is excellent in recyclability and can be used after a predetermined period of time after heating and pressurization. Firmly followed by being stuck. The present invention is based on the knowledge that the adhesive composition has a macromonomer represented by the following formula (A), a functional group-containing monomer represented by the following formula (B), and a mercapto group. a copolymer formed by polymerization of an alkyl acrylate, Η Η

I I Η ——C = C—RT H — C = C—Ri

II R2 r4 Formula (A) Formula (B) (In the above formula (A), & is hydrogen or methyl, and Rz is a substituent having a molecular weight of 1,000 or more and 20,000 or less. In the above formula (B), & And a substituent having a carbon number of 1 or more and 1 Å or less in a chemical structure of hydrogen or a fluorenyl 'R. 4 system, and containing any one of a group of functional groups of 200907001 selected from an OH group, a COOH group, and an NH 2 group. The above functional groups). The present invention is an adhesive composition in which the glass transition temperature of the giant single system is 50 ° C or more, and the number average molecular weight is 1 Å or more and 20,000 or less. The present invention is an adhesive composition which contains a crosslinked polymer obtained by crosslinking the copolymer. The present invention relates to an adhesive sheet having an adhesive composition in which a sheet-like adhesive composition is formed into a sheet having a macromonomer represented by the following formula (A) and having the following formula (B) a copolymer formed by polymerizing a functional group-containing monomer and an alkyl (meth) acrylate, and the copolymer contains a crosslinked polymer which has been crosslinked, ΗI H—C = C—R, I R2 Formula (A) HI H — C = C—R3I R4 Formula (B) (In the above formula (A), R! is hydrogen or a fluorenyl group, and I is a molecular weight of 1 Å or more and 20,000 or less. In the above formula (8), the & is a substituent having a carbon number of 1 or more and 10 or less in a hydrogen or a fluorenyl 'R4 chemical structure, and contains a group selected from the group consisting of a fluorenyl group, a COOH group, and a fluorene group. Any one or more of the functional groups in the functional group). The present invention relates to an optical adhesive sheet having a transparent substrate, an antireflection film disposed on the surface of the transparent substrate, and an adhesive layer disposed on the back surface of the transparent substrate, wherein the adhesive layer is an adhesive. Composition of the composition, 200907001 5H adhesive composition has a macromonomer represented by the following general formula (A), a functional group-containing monomer represented by the following formula (B), and (fluorenyl)acrylic acid The alkyl ester says & formed copolymer ' and the copolymer contains crosslinked crosslinked polymer, H - C = C - R, I R2 formula (A) HC - C - Rg

I r4 Formula (B), (R in the above formula (A) is hydrogen or a methyl group, and R2 is a substituent having a molecular weight of 1 Å or more and 20,000 or less. In the above formula (B), R 3 is hydrogen. Or a methyl group, and the R4 chemical structure has a substituent having a carbon number of 10,000 or more and a size of 1 Å or less, and a functional group selected from the group consisting of a φ OH group, a COOH group, and a leg 2 group. base). The present invention relates to an electromagnetic wave shielding adhesive sheet having a substrate, a conductive mesh disposed on the surface of the substrate, and an adhesive layer disposed on the surface or the back surface of the substrate, and the adhesive layer is an adhesive. The composition of the adhesive has a macromonomer represented by the following formula (A), a functional group-containing monomer represented by the following formula, and a (meth)propionic acid calcining plant. Poly = formed copolymer, and the copolymer contains crosslinked crosslinked polymer, Η Η

IH - C = C - R, I r2 Formula (a) Η - C = C - R3 R4 Formula (B) 200907001 (The above formula (A) tR] is hydrogen or methyl, & molecular weight is 1 The substituent of 〇〇〇 or more and 20,000 or less, wherein the rule 3 in the above formula (... is hydrogen or a methyl group, and the R4 is a substituent having a carbon number of i or more and 丨〇 or less in the chemical structure, and is selected from the group consisting of an OH group, Any one or more of the functional groups of the COOH group and the Nh2 group. The adhesive composition and the adhesive sheet of the present invention are a so-called pressure-sensitive adhesive, and are suitable for image display such as an optical film and a PDP. The fitting of the device can achieve the necessary and sufficient adhesive force for the general use of the image display device, and then has the absorption of the step edge printing and the like, and does not cause floating, peeling and the like even under high temperature and high humidity. Because the stamping plasticity is excellent, the adhesive is less slack or scattered. In the process of the image display device, even if the adhesive sheet is peeled off, there is no adhesive residue or contamination on the substrate. Excellent secondary workability. Adhered to being adhered Even if it is peeled off after the body, the residue of the adhesive will not remain in the adherend. Since the mechanical strength of the adhesive will rise with time after adhering to the adherend, the adhered body can be firmly fixed. It is excellent, so that the adhesive sheet can be cut into a free shape in accordance with the adherend. [Embodiment] First, the procedure for producing the adhesive composition of the present invention will be described. The above formula (A) is mixed in a suitable solvent. The macroscopic body, the functional group-containing monomer represented by the formula (...), the (meth)acrylic acid 200907001 alkyl ester represented by the following formula (C), and the polymerization initiator are subjected to a usual method (for example, heating). The copolymer of a macromonomer, a functional group-containing monomer, and an alkyl (meth) acrylate is copolymerized to form a copolymer so that the weight average molecular weight is 400,000 to 2,000,000. Further, the above formula (A) is shown. The macromonomer, wherein the substituent R2 is preferably a methyl methacrylate (MMA) polymerized into a polymeric structure having a molecular weight of 1,000 or more and 20000 or less. The following structural formula (A') is shown, and the structure derived from the functional group-containing monomer is represented by the following structural formula (B'), and the structure derived from the alkyl (meth)acrylate is represented by the following structural formula. (C'). —CC- IIIH Rz J Structural Formula (A ')

H R3 > C-C

Structural formula (B,) — C-C--

II k H COORg J Structural formula (C') (In the above structural formula (A'), Ri is hydrogen or a sulfhydryl group, and R2 is a substituent having a molecular weight of 1,000 or more and 20,000 or less. R2 is preferably a methyl methacrylate ( MMA) is polymerized into a polymeric structure having a molecular weight of 1,000 or more and 2000 or less. In the structural formula (B'), R3 is hydrogen or a methyl group, and in the R4 chemical structure, a substituent having 1 or more and 10 or less carbon atoms is selected. Any one or more functional groups in the s-energy group composed of a free OH group, a COOH group, and an NH2 group. In the above structural formula (C), R5 represents hydrogen or a fluorenyl group, and R6 is (CH2)mCH3, m is An integer of 0 or more and 11 or less.) The copolymer, the curing agent, and, if necessary, a curing aid, an additive, and a solvent are mixed to form a paste-like adhesive composition. 200907001 After the adhesive is composed of the adhesive layer, if the adhesive layer is applied to the surface of the peeling crucible 11 by the hardener, the adhesive is heated and the solvent is removed from the adhesive layer and crosslinked. In the case of a different agent, it will react with the Lunengji (Jane 2, COOH, and 〇H groups) of the above structural formula (B,), and in the ', 〇 (B) and structural formulas. (B,) forms a crosslinked structure by isocyanation. Reference numeral 15 in Fig. 1 denotes an adhesive layer 15 in a state in which a copolymer is crosslinked to form a crosslinked polymer. The reference numeral 1G in Fig. 1 indicates an adhesive sheet in which the release films 11, 12 are adhered to both surfaces of the adhesive layer 15. Since the adhesive layer 15 is crosslinked by the copolymer, the shape is maintained in a sheet form and has adhesiveness and flexibility. When the adhesive sheet 1 shown in the figure is wound into a roll, since the adhesive layer 15 does not contact each other, the adhesive sheet can be taken out from the roll. In the surface and the back surface of the adhesive layer 15 , even if the release film 11 is adhered only to the back surface and the surface of the adhesive layer 15 is exposed, if the release treatment is performed on the back surface of the release film 11 , the adhesive layer 15 is not The film may be formed in a roll shape after being attached to the back surface of the release film 11. Next, the use case of the adhesive sheet 1 is explained. Reference numeral 20 in Fig. 2(a) denotes an anti-reflection sheet with electromagnetic wave shielding, and the anti-reflection sheet 20 has a substrate 21 and an anti-reflection film 31 disposed on the surface of the substrate 21. Here, between the substrate 21 and the anti-reflection film 31, a conductive mesh 25 and a transparent layer 2 2 for reducing the haze are disposed. Here, the conductive mesh 25 is pasted with a polyester adhesive. On the surface of the substrate 21, the transparent layer 11 200907001 22 is opened to cover the conductive mesh 25. &quot;When the anti-reflective sheet 20 is followed by another adherend (for example, a display device such as pDp or LCD), the release film η is peeled off to expose the surface of the adhesive layer 1 $, and the exposed surface is pressed against The substrate 21 is provided with the opposite side of the anti-reflection film 20 side. As described above, since the adhesive layer 15 has adhesiveness and flexibility, the adhesive layer 15 is adhered to the substrate 21 in a gap-free adhesive state. When the heat is pressed under the shape I, the adhesive layer 15 can be firmly fixed to the anti-reflection sheet 20, and the optical adhesive sheet 2 can be obtained. Fig. 2 (4) shows a state in which the surface opposite to the anti-reflection sheet 2 of the adhesive (four) 15 is covered by the release film 11, and no dust or the like is attached to the adhesive layer 15. The symbol 40 of the circle 2 (b) indicates a display device having a display surface for displaying image information such as a figure or a character. The release film 11 is peeled off from the optical adhesive sheet 2 to chrome the surface of the adhesive layerer 5, and the exposed surface is pressed against the display surface (temporary pressure bonding). The pasting position of the optical adhesive sheet 2 in the display surface is predetermined, and when the optical adhesive sheet 2 is displaced from the pasting position, the optical adhesive sheet 2 is peeled off from the display surface. As described above, since the adhesive layer 15 is firmly fixed to the anti-reflection sheet 20, the adhesive layer 15 is not peeled off from the anti-reflection sheet, but peeling and resistance are generated at the interface between the adhesive layer 15 and the display device 4G. The reflection sheets 20 are peeled off together. As described above, since the adhesive layer 丨5 is hardened by the cross-linking of the copolymer, the adhesion layer 15 does not cause aggregation damage, and the adhesive layer Μ is not 12 200907001 will be transferred to the display device 4〇 The surface of the optical adhesive sheet 2, which has been peeled off from the display device 4G, is discarded, and the new optical adhesive sheet 2 is pressed against the display device 4, or the optical adhesive sheet 2 which has been once peeled off is pressed against the display device 40 again. The peeling and temporary pressure bonding are repeated, and the optical adhesive sheet 2 is placed at the pasting position. After confirming that the optical adhesive sheet 2 has been placed at the correct bonding position, if it is heated at a pressure equal to normal pressure (for example, in high-pressure steel, 6 〇〇c (heating 1% by mass)', the adhesive layer i 5, the adhesion will be reappeared, and the light 4 will be adhered to the display device. After the optical adhesive #2 is applied to the display device 4, it is cooled, and the optical adhesive sheet 2 is firmly fixed to The display device 4A does not peel off even if a physical impact is applied. The symbol 1 of Fig. 2(c) indicates that the optical adhesive sheet 2 is fixed to the display device with the flat plate attached to the display device 40. Since the substrate 21, the conductive mesh 25. The transparent layer 22 and the anti-reflection film 31 are transparent, and the adhesive layer 15 of the present invention is also transparent. Therefore, the image displayed on the display surface can be observed from the side of the side on which the anti-reflection sheet 20 is fixed. The antireflection film 31 is composed of, for example, a plurality of transparent film layers, and the film thickness and refractive index of each transparent film are designed such that the phase of the reflected light at the interface reflected on the surface of each transparent film is relative to sunlight or illumination. Waiting for the outdoor light to reflect on the surface of the display surface The light is deflected, and the surface reflected light is used to attenuate the surface reflected light. Therefore, the image of the display surface can be clearly observed. The conductive mesh 25 is, for example, patterned of a metal film, as shown in FIG. 3, 13 200907001 The planar shape is a lattice In the above, although the external electromagnetic wave is inaccessible. Although the anti-reflection sheet 2 having the conductive mesh 25 has been described above, the present invention is not limited thereto, and as shown in FIG. 4, the anti-reflection does not have the conductive mesh 25. The sheet 35 is adhered to the adhesive layer 15 to form the optical adhesive sheet 3. The adherend is not limited to the anti-reflection sheet 2, 35, and may have the substrate 21 and the conductive mesh 25 disposed on the surface of the substrate 21. The electromagnetic wave shield 3 of the 25 surface and the side surface covered with the insulating transparent layer 22) is used as an adherend (Fig. 5). f In Fig. 5, the adhesive layer 丨5 is adhered to the substrate 2 The surface of the conductive mesh 25 on the side opposite to the side is illustrated as the electromagnetic wave shielding adhesive sheet $, but the adhesive layer 15 may be adhered to the side of the substrate 21 on which the conductive mesh 25 is disposed (for example, Transparent layer 22 surface) to make electromagnetic The adhesive sheet for shielding. Examples The copolymers were copolymerized and formed into a copolymer by the composition shown in the following Table 1, and then the copolymer, the hardening aid, and the isocyanate curing agent were blended in the composition shown in Table 1 below to prepare 9 After the adhesive composition, each adhesive composition was heated to form a sheet, and the adhesive layer 15 of Example 6 and Comparative Example 3 was prepared. The monomers of Tables 1 and 2 below, and the hardening aid. And the ratio of the hardener to the parts by weight (parts by mass) 14 200907001 Table 1: Composition of raw material monomers, adhesive compositions, and evaluation results > Narrative 1 tm\2 _column 2 tmi3 Recital 4 t Reward 3 婉 5 5 贵 列 6 General formula (C) butyl acrylate 94.0 91.5 89.0 94.0 91.5 89.0 94.0 91.5 89.0 General formula (C) Methyl methacrylate 5.0 5.0 0.0 5.0 5.0 0.0 5.0 5.0 0.0 General formula (Β) Acrylic 5.0] 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 General formula (Β) Hydroxyethyl methacrylate 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 General formula (Α) Giant monomer 0.0 2.5 5.0 0.0 2.5 5.0 0.0 2.5 5.0 Hardening aid Agent epoxy decane auxiliary 0.0 0.0 0.0 0.1 0.1 0.1 0.0 0.0 0.0 imidazolium Agent 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 __ Isocyanate hardener 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Differential absorption X Δ 〇X Δ 〇X △ — 〇 Evaluation: cl g Secondary workability X Δ 〇X △ 〇X Λ 〇Resistance reliability XXX 〇〇〇〇〇〇 Stamping plasticity X Δ 〇X Δ 〇X Δ 〇 In addition, the “macromonomer” in Table 1 and Table 2 described later is MMA-Me (mercaptoacrylic acid) The methyl ester macromonomer) is a polymeric structure obtained by polymerizing methyl methacrylate (MMA) of the above formula (A). Each of the samples composed of the adhesive layers 15 of Examples 1 to 6 and the adhesive layers of Comparative Examples 1 to 3 was evaluated for the evaluation items listed in Table 1 above, and The results of this evaluation are described in the above table below 1 ° 'Description of evaluation items. <Measurement method: Peel strength> Measured by PET (polyethylene terephthalate) film with film thickness 25 and adherend After the clamping, the roller having a weight of 2 kg is reciprocally pressed once on the ρΕτ film. The peeling strength, as shown in FIG. 6, holds the end of the pet film 51 protruding from the adhesive layer 15 and folds it. The folded portion of the ρ Ετ film $ 1 is bent 18 从 from the state before the folding. In this state, when the stretching film is stretched at a tensile speed of 15 200907001 3 〇 Omm/min 5 夕 (4) such as *% of * In the case of peeling off the adhesive layer 15 from the adherend 50, the minimum value of the force is used as the peel strength. The value of the peel strength is used in the following "_a" "Evaluation. <Evaluation item: Secondary processing property> Put each n-time μ pure, and place it at normal temperature. The peel strength is measured. The sample with a peel strength of 5 N or less is "〇", and the sample with a peel strength of more than 5 N is r △ A". The sample which is agglomerated and damaged at the interface with the adherend 50 is " χ 进行 进行 & & & & & & & & & & & & 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性 可靠性And the town will check the state of the nephew.

X is 〇", so that the sample can be observed to expand and float from the attached object. &lt;Segment Absorbency&gt; Each sample is pressed against the adherend having the segment ## 头盔人八奴奴Observe. The sample in which the gap is bonded to the adherend is "〇m ^ q so that the sample in which the oxygen bubble (gap) can be observed in the step portion is "△ 抨 如 如 , , , , , , , , , , , , , , , , , , , , Samples with a large gap left by the knife were evaluated for "χ". <Punehing workability> When stamping each sample with a mold, the stamping feeling "n (1) Λ 将 将 将 样品 样品 样品 样品 样品 样品 样品 样品 样品 将 将 将 将 将 将 将 将 将 将 n n n n n n n n n n n n n n n n n n n n n n n The sample was evaluated as "X"'. The monomer contained the formula 2 and the "recyclability", the secondary workability, and the "punchable 16 200907001 plasticity" were higher. Further, when a decane compound such as epoxy decane or imidazolium is added to the adhesive composition, the "reliability after" can be improved. Further, it has been confirmed by experiments that if imidazolium is used, the time required to harden the adhesive layer can be shortened. Therefore, it is estimated that the reaction rate of the copolymer crosslinking reaction is increased by the presence of a tertiary amine such as imidazole. In another embodiment, the composition shown in the following Table 2 was obtained by copolymerizing a monomer to form a copolymer, and the copolymer, the hardener, and the isocyanate curing agent were blended in the composition shown in the following Table 2 to prepare eight kinds. After the adhesive composition, the enamel adhesive composition was heated to form a sheet to form the adhesive layer 15 of Examples 7 to 2 and Comparative Example 4. Table 2. Composition of raw material monomers, adhesive compositions, and evaluation results

Forefront 7 Case 8 Face Example 9 tim ίο Cable &amp; (column 11 19 bl·Lee 4 Formula (C) Butyl acrylate 89.0 85.5 88.0 86.0 84.0 fiQ Π 89 0 Formula (C) Ethyl methacrylate 5.0 5.0 5.0 5.0 5.0 ς η 5 0 Formula (B) Acrylic acid 0 0.5 1.0 3.0 5.0 1 Π 10 Formula (B) Hydroxyethyl methacrylate 1.0 1.0 1.0 1.0 1.0 1.0 1.0 General formula (A) Hardening agent macromonomer Decane coupling agent 5.0 ------- 0.1 5.0 5.0 5.0 5.0 5.0 — 0.1 0.1 0.1 0.1 0 1 Hardener evaluation item different # Initial peel strength long temperature 24 hours after 240 hours 60 ° C 24 hours after 1.0 -- ----- 0.9 ------------- 1.0 1.2 1.0 3.9 1.0 7,7 1.0 12.6 1.0 4.2 1.0 4.3 1.5 — 1.6 7.0 15.6 17.6 7.2 6.5 1.7 ---- 1.5 1.9 13.5 20.0 21.4 12.7 11.3 1.9 14.5 15.6 22.6 13 2 13.2 After 60 hours at 60°C 1.9 2.3 15.2 23.6 35.8 13 9 16.5 60 °C 95 % appearance state secondary processing floating 〇 floating up 〇〇〇〇〇〇 X 17 200907001 Each of the samples composed of the adhesive layers 15 of Examples 7 to 12 and the adhesive layer of Comparative Example 4 was used for the above samples. The 5 evaluation items described in Table 2 are evaluated, and the evaluation results are described in the above Table 2. The following 'describes the evaluation contents of the evaluation item. &lt;Measurement method: Peel strength> The adhesive sheet is cut into 20 mm, and then The peeling strength was measured at a peeling angle of 1 80 and a peeling speed of 300 mm/min at a speed of 300 mm/min by a manual roller having a weight of 2 kg at a speed of 300 mm/min. Further, unlike the above-mentioned surface, peel strength was measured. "Initial (normal temperature)", "after 24 hours at room temperature", "after 240 hours at room temperature", "after 24 hours at 6 °C", and "after 240 hours at 60 °C" Peel strength. &lt;Evaluation item: Appearance state&gt; Same as "Reliability after the above" in Table 1, after each sample was adhered to the adherend, and then placed at a temperature of 6 (rc, humidity 95%) (10) After an hour, observe the appearance. If the appearance is not "floating", the change is "〇", and the change is observed as "x". Estimate item: secondary workability> This secondary workability is the same as the "secondary workability" of "1". As is apparent from the above Table 2, Comparative Example 4 in which the raw material of the copolymer did not contain a macromonomer had no secondary workability. χ ' It is known that the peel strength increases with the content of acrylic acid. In addition, the amount of each monomer to be used in the formation of the copolymer is not limited to those described in Table 1 and Table 2, and it is preferred that the amount of the macromonomer of the formula (A) is 1 part by weight or more. 1 part by weight or less, the compounding amount of the reactive unsaturated monomer (monomer containing a functional group) of the formula is 〇1 part by weight or more, 1 〇 by weight or less, and the methyl group of the following formula (C) The compounding amount of the alkyl acrylate is in the range of 80 parts by weight or more and 98.9 parts by weight or less. Here, the macro-system has a macromonomer of (fluorenyl) acrylonitrile, the glass transition temperature is 50 ° C or more, and the number average molecular weight is 1 〇〇〇 2 〇〇〇〇 (preferably 2000 10000 Within the scope of). Specific examples of the macromonomer include a giant monoterpene in which a (meth) acrylonitrile group is introduced at a polymerization terminal such as methyl methacrylate, styrene or acrylonitrile, or a mixture of |ethylene and propylene. A macromonomer of a (fluorenyl) acrylonitrile group is introduced at the end of the copolymer or the like. The glass transition temperature of the macromonomer before polymerization must be 5 〇t; c or more, preferably 60 ° C or more. When the temperature is lower than 5 〇t &gt; c, the removability is deteriorated. When the temperature is high and the humidity is high, the floating or falling is caused. The (methyl) methacrylate monomer is a general formula. (6) The acryl vinegar or methacrylic acid vinegar shown, specifically, 彳 甲 甲 甲 甲, 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙 乙Dilute acid, butyl methacrylate, ethyl hexyl methacrylate, etc. θ Η

I Η — C — C — Rg C00R6 Formula (c) 19 200907001 (In the above formula (C), 115 represents hydrogen or a methyl group, the rule 6 is (CH 2 ) mCH 3 , and m is an integer of 0 or more and 11 or less. The acrylate system imparts viscosity to the resulting copolymer. The reactive unsaturated monomer is at least one type of a reactive group having a trans group (—〇H), a carboxyl group (a COOH), an amine group (—NH 2 ), and a derivative thereof, and a double bond (C= The monomer of C) may, for example, be acrylic acid, methyl acrylic acid, N-methylol acrylamide, glycidyl methacrylamide, allyl glycidyl ether, 2-hydroxyethyl acrylate, 2 2-hydroxymethacrylate, 2-propyl propyl acrylate, maleic anhydride, and the like. In the case of copolymerizing each monomer, a polymerization initiator which can be used is an azo polymerization initiator or a peroxy polymerization initiator. Preferred examples of the azo-based polymerization initiator include azobisisobutyronitrile, 2,2'-azobis(2,synyl valeronitrile, 1,1,-azobis(cyclohexyl). Nitrile, 2,2,_ azobis(4methoxy 2,4-dimethylvaleronitrile), 2,2,-azobis(2-cyclopropylpropionitrile), 2,2'-azo Bis(2-methylbutyronitrile), and u,-azobis(cyclohexyl-carbonitrile), etc. Preferred peroxygen polymerization initiators include, for example, peroxytrimethylacetic acid tert-butyl ester, Tert-butyl peroxy neodecanoate, butyl peroxyisobutyrate, cumyl peroxyneodecanoate, peroxy(2-ethylhexyl) tert-butyl benzoate Hyperthyroidism, oxidized laurel, bismuth peroxide, oxidized beryllal, and peroxytoluene, etc. The weight average molecular weight of the copolymer of the above three monomers is 4〇^r; L. T Ma禺上, preferably more than 800,000, more preferably! 〇〇万~2 million. When the weight average molecular weight of 20 200907001 is less than 800,000, if it exceeds 2 million, the coating will lack re-peelability and The workability of the step will be reduced. As the crosslinking agent (hardener) to which the polymer is crosslinked, for example, an isocyanate-based compound can be used. The isocyanate compound is exemplified by, for example, toluene diisocyanate, hydrogenated toluene sulphate, and octadecanoquinone. , toluene diisocyanate adduct of dimethylolpropane, _ _ κ 〒 〒 一 monoisocyanate adduct of trimethyl propyl propane, triphenyl sulfonium triisocyanate, methylene bis(4-methyl meth) triisocyanate , isophorone diisocyanate, etc., and this 黧. ketoxime block or hope block, or iso-cyanuric acid, etc. The calcined phthalic acid is preferably most effective. The amount of the hardener added is 0.05 to 5 parts by weight based on 1 part by weight of the acrylic resin (copolymer), preferably 〇丨~4. Parts by weight: When the amount added is less than 0.05 part by weight, the curing may not be sufficiently cured, and the cohesive force may be insufficient, and the adhesion is poor or the re-peelability may be poor under high temperature and high humidity, and the adhesion may be poor. Part, it will promote hardening excessively, leading to the subsequent drop Low and thus poor. The decane coupling agent may be added to the resin composition of the present invention. The broth coupling agent may, for example, be 3-glycidoxypropyltrimethoxy decane or 3-glycidoxypropylmethyl amide. Epoxy-containing decane coupling agent such as ethoxy oxane or 2-(3,4-epoxycyclohexyl)ethyltrimethoxy decane, 3-aminopropyltrioxoxane 'N_2 (amine ethyl)-3- Amine-containing decane coupling agent, 3-acrylic acid, such as prolyi methyl dioxane, ruthenium triethoxy oxime-N-(l,3-dimethylbutylidene) propylamine 3-(acryloxy)propyltrimethoxysilane, 3-methylpropionic acid oxypropyl tri 21 200907001 ethoxylated decane coupling agent containing (indoyl)acrylic acid, 3-isocyanate propyldiethoxylate A decane coupling agent containing an isocyanate group such as decane. Preferably, a hardening aid is added to the dot composition, and a crosslinking reaction of the isocyanic acid is promoted. The hardening aid is preferably a #3 grade amine, and more preferably contains a mwa stone. The coupling agent of the hospital can promote the cross-linking reaction of isocyanic acid vinegar and shorten the hardening time after manufacture, and can increase the weight of the compound (4). If the amount of addition is too large, the amount of the image-forming hardening aid is preferably from 〇〇2 to 〇2, and the subsequent moisture resistance reliability may be poor, and the re-peelability of the device may be poor. The adhesive composition prepared above may also be blended with an additive such as a dye, an ultraviolet absorber, a surfactant, and an anti-aging agent as needed. ,

Further, a polymer other than the above copolymer (including a separate polymer or copolymer) may be added to the adhesive composition of the present invention and an adhesive sheet. The type of the substrate such as the D film is not particularly limited, and a glass substrate or a transparent resin can be used. [Brief Description] FIG. 1 is a view for explaining the present invention. FIG. 2(a) to (c) are for explaining the same. A cross-sectional view of the steps. A cross-sectional view of the adhesive sheet. The optical adhesive sheet is attached to Fig. 3 to illustrate a plan view of the conductive mesh. Fig. 4 is a cross-sectional view showing another example of the optical adhesive sheet. Fig. 5 is a view showing an electromagnetic wave shielding (four) drawing. 22 200907001 Figure 6 is a cross-sectional view showing a test method for peel strength. [Main component symbol description] 2, 3 Optical adhesive sheet 5 Electromagnetic wave shielding adhesive sheet 10 Adhesive sheet 15 Adhesive layer 21 Substrate 25 Conductive mesh 31 Anti-reflection film 40 Display device 23

Claims (1)

200907001 X. Application of the patent specification: 1. A seed composition having a macromonomer represented by the following formula (A) and a monomer having a functional group represented by the following formula (B) And (曱) a copolymer formed by polymerization of acrylic acid, Η Η Η CII CR r2 Formula (A) Η — C = C — R3 I R4 General formula (B) (The above formula (VIII) Wherein R1 is hydrogen or a methyl group, and R2 is a substituent having a molecular weight of 1 〇 乂 or less and 20 Å or less. In the above formula (6), &amp; is hydrogen or a group R4 has a carbon number of 1 or more. The substituent below 1 含有 contains a functional group selected from any one of a functional group consisting of a φ OH group, a C00H group, and a fluorene group. 2. The adhesive composition of claim 1, wherein the macro-system glass transition temperature is 5 (TC or more, and the number average molecular weight is 1000 or more and 20,000 or less. 3. If the patent application scope is the third item An adhesive composition comprising a crosslinked polymer obtained by crosslinking a copolymer. 4. An adhesive sheet having an adhesive composition formed into a sheet-like adhesive layer, the adhesive composition having the following formula ( A) a macromonomer, a functional group-containing monomer represented by the formula (B), and a copolymer formed by polymerizing (meth), and the copolymer contains a crosslinked cross.联24 200907001, ΗI H—C = C—RTI General formula (A) H 1 H — C = C —R3I R4 General formula (B) (In the above formula (VIII), R1 is hydrogen or methyl, and R2 is The substituent having a molecular weight of 1,000 or more and 20,000 or less is a hydrogen or a mercapto group in the above formula (B), and a substituent having a carbon number of 1 or more and 10 or less in the I-based chemical structure, and containing an OH group, Any one or more functional groups of a functional group consisting of a COOH group and an NH2 group). a transparent substrate, an antireflection film disposed on a surface of the transparent substrate, and an adhesive layer disposed on a back surface of the transparent substrate, wherein the adhesive layer is composed of an adhesive composition, and the adhesive is composed of And a copolymer formed by polymerizing a macromonomer represented by the following formula (A), a functional group-containing monomer represented by the following formula (B), and an alkyl (meth)acrylate; The copolymer contains a crosslinked polymer which has been crosslinked, Η I = r7 I r2 Formula (A) HIH — C = C — R3 1 r4 Formula (B) 25 200907001 (K in the above formula (in) is hydrogen Or a methyl group 'Rz is a substituent having a molecular weight of 1 Å or more and 20,000 or less, and in the above formula (B), &amp; is a chlorinated methyl ' &amp; a chemical structure having a carbon number of 1 or more and 10 or less The substituent includes at least one functional group selected from the group consisting of an OH group, a COOH group, and an NH2 group. 6. A magnetic wave shielding adhesive sheet having a substrate and disposed on the material a conductive mesh on the surface, and an adhesive disposed on the surface or the back surface of the substrate 'The adhesive layer is composed of an adhesive composition having a macromonomer represented by the following general formula (A) and a functional group represented by the following general formula (B) a copolymer formed by combining a monomer and an alkyl (meth) acrylate, and the copolymer contains a crosslinked polymer which has been crosslinked, Η —— C = C — R r4 Formula (B) R 2 Formula (A) Any one of the methyl groups in the group, R2 is a substituent having a molecular weight of 1,000 or less, and R3 in the above formula (B) is a substituent having a carbon number of 1 or more and 10 or less in the structure of hydrogen or a carbamate, and is represented by a hydrazine H group. a C 〇〇 H group and a functional group of a functional group or more composed of an NH 2 group). 26