JP2015045022A - タッチパネル用粘着剤組成物 - Google Patents
タッチパネル用粘着剤組成物 Download PDFInfo
- Publication number
- JP2015045022A JP2015045022A JP2014227868A JP2014227868A JP2015045022A JP 2015045022 A JP2015045022 A JP 2015045022A JP 2014227868 A JP2014227868 A JP 2014227868A JP 2014227868 A JP2014227868 A JP 2014227868A JP 2015045022 A JP2015045022 A JP 2015045022A
- Authority
- JP
- Japan
- Prior art keywords
- sensitive adhesive
- pressure
- touch panel
- adhesive composition
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000000203 mixture Substances 0.000 title claims abstract description 43
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
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- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
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- 229910003437 indium oxide Inorganic materials 0.000 description 2
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
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- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 description 1
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 1
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- JYSWMLAADBQAQX-UHFFFAOYSA-N 2-prop-2-enoyloxyacetic acid Chemical compound OC(=O)COC(=O)C=C JYSWMLAADBQAQX-UHFFFAOYSA-N 0.000 description 1
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- WYOXPIKARMAQFM-UHFFFAOYSA-N n,n,n',n'-tetrakis(oxiran-2-ylmethyl)ethane-1,2-diamine Chemical compound C1OC1CN(CC1OC1)CCN(CC1OC1)CC1CO1 WYOXPIKARMAQFM-UHFFFAOYSA-N 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- REJKHFKLPFJGAQ-UHFFFAOYSA-N oxiran-2-ylmethanethiol Chemical compound SCC1CO1 REJKHFKLPFJGAQ-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 238000005118 spray pyrolysis Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- WMXCDAVJEZZYLT-UHFFFAOYSA-N tert-butylthiol Chemical compound CC(C)(C)S WMXCDAVJEZZYLT-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- IUCJMVBFZDHPDX-UHFFFAOYSA-N tretamine Chemical compound C1CN1C1=NC(N2CC2)=NC(N2CC2)=N1 IUCJMVBFZDHPDX-UHFFFAOYSA-N 0.000 description 1
- 229950001353 tretamine Drugs 0.000 description 1
- 239000000326 ultraviolet stabilizing agent Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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Abstract
Description
製造例1
窒素ガスが還流され、温度調節が容易となるように冷却システムを設置した1L反応器にn−ブチルアクリレート(nbutylacrylate:BA)69重量部、メチルアクリレート(methylacrylate:MA)30重量部及び2−ヒドロキシエチルメタクリレート(2−hydroxyethyl methacrylate:2−HEMA)1重量部を投入した。溶剤として、エチルアセテート(ethylacetate:EAc)120重量部を投入し、チオール化合物としてn−ドデカンチオールを0.01重量部投入した。
チオール化合物0.03重量部を使用した点を除いて、製造例1に準ずる方法で固形分が30重量%であり、重量平均分子量が80万であり、多分散度(PDI)が2.6であるアクリル重合体溶液を製造した。
チオール化合物0.05重量部を使用した点を除いて、製造例1に準ずる方法で固形分が30重量%であり、重量平均分子量が50万であり、多分散度(PDI)が2.4であるアクリル重合体溶液を製造した。
n−ブチルアクリレート(n−butylacrylate:BA)59重量部、メチルアクリレート(methylacrylate:MA)40重量部及び2−ヒドロキシエチルメタクリレート(2−hydroxyethylmethacrylate:2−HEMA)1重量部で構成される単量体混合物を使用し、チオール化合物0.06重量部を使用したという点を除いて、製造例1に準する方法で固形分が30重量%であり、重量平均分子量が45万であり、多分散度(PDI)が2.4であるアクリル重合体溶液を製造した。
チオール化合物を使用しない点を除いて、製造例1に準ずる方法で固形分が30重量%であり、重量平均分子量が60万であり、多分散度(PDI)が5.2であるアクリル重合体溶液を製造した。
チオール化合物を使用しない点を除いて、製造例4に準ずる方法で固形分が30重量%であり、重量平均分子量が120万であり、多分散度(PDI)が5.6であるアクリル重合体溶液を製造した。
実施例1
製造例1で得られたアクリル重合体溶液の固形分100重量部に対してイソシアネート架橋剤(TDI、トルエンジイソシアネート)0.3重量部を均一に混合し、粘着剤組成物を製造した。
製造例2で得られたアクリル重合体溶液を使用した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
製造例3で得られたアクリル重合体溶液を使用した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
製造例4で得られたアクリル重合体溶液を使用した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
製造例5で得られたアクリル重合体溶液を使用した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
製造例6で得られたアクリル重合体溶液を使用した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
両面にハードコーティングが形成されているポリエチレンテレフタレートフィルム(厚さ:100μm)のハードコーティング面とポリカーボネートシート(厚さ:1mm)を粘着剤層を媒介で付着し、横50mm、縦100mmサイズに切断した後、60℃及び5気圧下で、30分間オートクレーブ処理し、サンプルを製造した。
耐久性は、上記各条件で放置後に気泡及び浮き上り/剥離発生有無を観察して評価し、上記各物性の具体的な評価基準は、下記の通りである。
O:粘着界面で、気泡が観察されないか、直径100μm以下の気泡が少量分散して観察される場合
X:粘着界面で、直径100μm以上の気泡が発生あるいは直径100μm以下の気泡が群集して発生した場合
O:粘着界面で浮き上り/剥離がない場合
X:粘着界面で浮き上りまたは剥離が発生した場合
反り特性は、上記耐熱条件で放置されたサンプルを底に配置した場合、底から上記サンプルの最も遠い距離までを測定して反り程度を評価した。
抵抗変化率は、図6に示されたような方式で測定した。一面にITO薄膜20が形成されたPETフィルム10(以下、「導電性PET」)(Oike社ITOフィルム、商品名:KA500PS1−175−UH/P、Crystalline ITO)を30mm×50mm(幅×長さ)のサイズに切断した。次いで、図6のように、フィルム10の両端に10mmの幅で銀ペースト(Silver Paste)30を塗布し、150℃で30分間焼成した。その後、実施例及び比較例などで製造されるもので、両面に離型フィルム50が付着している粘着フィルムを30mm×40mm(幅×長さ)のサイズに切断し、一面の離型フィルムを除去した後、粘着剤層40を焼成されたフィルムに付着した。上記付着は、粘着剤層の中心と導電性PET10、20の中心を合わせて行った。その後、通常の抵抗測定器60を使用してITO薄膜20の初期抵抗Riを測定した。初期抵抗測定後、図6の構造の試験片を60℃及び90%相対湿度で240時間放置し、さらに同一に測定器60でITO薄膜20の抵抗Rを測定し、それぞれの数値を上記一般式1に代入し、抵抗変化率△Rを測定した。
アクリル重合体の重量平均分子量及び多分散度は、GPCを使用して、以下の条件で測定した。検量線の製作には、Agilent systemの標準ポリスチレンを使用して、測定結果を換算した。
測定器:Agilent GPC(Agilent 1200 series、米国)
カラム:PL Mixed B 2個連結
カラム温度:40℃
溶離液:テトラヒドロフラン
流速:1.0mL/min
濃度:〜2mg/mL(100μL injection)
3、4 タッチパネル構造
11、21 粘着剤層
12、23、33、43 基材
32、44 基板
22、41、42 導電層
31 ハードコーティング層
5 粘着フィルム
51、52 離型フィルム
10 PETフィルム
20 ITO薄膜
30 銀ペースト
40 粘着剤層
50 離型フィルム
60 抵抗測定器
Claims (18)
- (メタ)アクリル酸エステル単量体を重合単位で含み、且つチオール化合物が結合されているアクリル重合体を含むタッチパネル用粘着剤組成物。
- (メタ)アクリル酸エステル単量体が炭素数1〜20のアルキル基を有するアルキル(メタ)アクリレートである、請求項1に記載のタッチパネル用粘着剤組成物。
- R2は、炭素数4〜20のアルキル基である、請求項3に記載のタッチパネル用粘着剤組成物。
- アクリル重合体は、(メタ)アクリル酸エステル系単量体97〜99.999重量部及びチオール系化合物0.001重量部〜3重量部を含む、請求項1に記載のタッチパネル用粘着剤組成物。
- アクリル重合体は、架橋性官能基を有する共重合性単量体を重合された形態でさらに含む、請求項1に記載のタッチパネル用粘着剤組成物。
- 架橋性官能基がカルボキシル基、ヒドロキシ基、窒素含有基、エポキシ基またはイソシアネート基である、請求項6に記載のタッチパネル用粘着剤組成物。
- アクリル重合体を架橋させる多官能性架橋剤をさらに含む、請求項1に記載のタッチパネル用粘着剤組成物。
- 多官能性架橋剤は、イソシアネート架橋剤、エポキシ架橋剤、アジリジン架橋剤または金属キレート架橋剤である、請求項8に記載のタッチパネル用粘着剤組成物。
- 請求項1に記載の粘着剤組成物を硬化された状態で含む粘着剤層を有するタッチパネル用粘着フィルム。
- 基材と、上記基材の一面または両面に形成され、請求項1に記載の粘着剤組成物を硬化された状態で含む粘着剤層とを有する導電性フィルム。
- 基材はプラスチック基材である、請求項12に記載の導電性フィルム。
- 基材の少なくとも一面には導電層がさらに形成されており、粘着剤層が上記導電層に付着している、請求項12に記載の導電性フィルム。
- 一面に導電層が形成されている基板をさらに含み、上記基板の導電層に粘着剤層が付着している、請求項12に記載の導電性フィルム。
- 基材上に形成された導電層をさらに含み、基板上に形成された導電層と基材上に形成された導電層が粘着剤層によって互いに付着している、請求項15に記載の導電性フィルム。
- 請求項12に記載の導電性フィルムを含むタッチパネル。
- アクリル重合体は、多分散度が4.0以下である、請求項1に記載のタッチパネル用粘着剤組成物。
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