JP2013543901A - 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
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- JP2013543901A JP2013543901A JP2013534823A JP2013534823A JP2013543901A JP 2013543901 A JP2013543901 A JP 2013543901A JP 2013534823 A JP2013534823 A JP 2013534823A JP 2013534823 A JP2013534823 A JP 2013534823A JP 2013543901 A JP2013543901 A JP 2013543901A
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- pressure
- sensitive adhesive
- adhesive composition
- touch panel
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- Prior art date
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Abstract
Description
窒素ガスが還流され、温度調節が容易となるように冷却装置を設置した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ルレート(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、酸素除去のために窒素ガスを60分間反応器内にパージ(purging)した。温度は、60℃に維持し、開始剤であるアゾビスイソブチロニトリル(azobisisobutyronitrile:AIBN)0.04重量部を投入し、8時間反応させた。反応後に反応物をエチルアセテート(EAc)で希釈し、固形分の含量が30重量%であり、分子量が85万であるアクリル重合体(A)溶液を製造した。
n−ブチルアクリレート(n−butylacrylate:BA)94重量部及びアクリル酸(acrylic acid:AA)6重量部を反応器に投入したことを除いて、製造例1に準ずる方法で固形分の含量が30重量%であり、分子量が120万であるアクリル重合体(B)溶液を製造した。
アクリル重合体(A)溶液の固形分100重量部に対してチオール化合物(n−dodecane thiol)0.05重量部及び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。製造された組成物を離型処理されているPET(poly(ethyleneterephthalate))フィルム(厚さ:50μm)の離型処理面にコーティングし、120℃の温度で3分間維持させて、厚さが50μmである粘着剤層を形成した。次いで、粘着剤層上に離型処理された厚さ50μmのポリエチレンテレフタレート(PET)フィルムの離型処理面をラミネートし、粘着フィルムを製造した。
チオール化合物の比率を0.1重量部に変更した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
チオール化合物の比率を0.5重量部に変更した点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
アクリル重合体(B)溶液の固形分100重量部を基準にして、チオール化合物(n−dodecane thiol)0.5重量部及びエポキシ架橋剤(N,N,N’,N’−tetraglycidyl ethylenediamine;Tetrad C;Mitsubishi製)0.03重量部を配合し、粘着剤組成物を製造した点を除いて、実施例1と同一に粘着フィルムを製造した。
チオール化合物を使用しない点を除いて、実施例1と同一の方法で粘着フィルムを製造した。
チオール化合物の代わりにn−ドデカンチオール0.5重量部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。
チオール化合物を使用しない点を除いて、実施例4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の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、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層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。初期抵抗の測定後、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)
- アクリル重合体及びチオール化合物を含む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単量体及び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含む、請求項1に記載の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は、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2に記載のタッチパネル用粘着剤組成物。
- 架橋性官能基がヒドロキシ基、カルボキシル基、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2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、重量平均分子量が35万〜250万である、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100重量部に対して0.001重量部〜5重量部のチオール化合物を含む、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9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13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13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13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16に記載の導電性フィルム。
- 請求項13に記載の導電性フィルムを含むタッチパネル。
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EP2617790A2 (en) | 2013-07-24 |
WO2012053831A2 (ko) | 2012-04-26 |
TW201231584A (en) | 2012-08-01 |
TWI444447B (zh) | 2014-07-11 |
WO2012053831A3 (ko) | 2012-08-02 |
KR101542285B1 (ko) | 2015-08-07 |
EP2617790A4 (en) | 2015-11-04 |
KR20120041133A (ko) | 2012-04-30 |
US20130202884A1 (en) | 2013-08-08 |
US9556365B2 (en) | 2017-01-31 |
JP2015071768A (ja) | 2015-04-16 |
EP2617790B1 (en) | 2020-06-24 |
CN103270125B (zh) | 2015-06-17 |
JP5954637B2 (ja) | 2016-07-20 |
CN103270125A (zh) | 2013-08-28 |
JP5676770B2 (ja) | 2015-02-25 |
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