JP7385168B2 - 光硬化性粘着剤組成物 - Google Patents
光硬化性粘着剤組成物 Download PDFInfo
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- JP7385168B2 JP7385168B2 JP2019047384A JP2019047384A JP7385168B2 JP 7385168 B2 JP7385168 B2 JP 7385168B2 JP 2019047384 A JP2019047384 A JP 2019047384A JP 2019047384 A JP2019047384 A JP 2019047384A JP 7385168 B2 JP7385168 B2 JP 7385168B2
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- meth
- polymer block
- adherend
- adhesive composition
- acrylic
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- 229920000642 polymer Polymers 0.000 claims description 59
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 36
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- 239000000178 monomer Substances 0.000 claims description 29
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 22
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 16
- 125000001424 substituent group Chemical group 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 14
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- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 230000009477 glass transition Effects 0.000 claims description 11
- 239000003999 initiator Substances 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
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- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- OVHHHVAVHBHXAK-UHFFFAOYSA-N n,n-diethylprop-2-enamide Chemical compound CCN(CC)C(=O)C=C OVHHHVAVHBHXAK-UHFFFAOYSA-N 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 1
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- YOTGRUGZMVCBLS-UHFFFAOYSA-N pentadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCOC(=O)C(C)=C YOTGRUGZMVCBLS-UHFFFAOYSA-N 0.000 description 1
- GOZDOXXUTWHSKU-UHFFFAOYSA-N pentadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCOC(=O)C=C GOZDOXXUTWHSKU-UHFFFAOYSA-N 0.000 description 1
- GYDSPAVLTMAXHT-UHFFFAOYSA-N pentyl 2-methylprop-2-enoate Chemical compound CCCCCOC(=O)C(C)=C GYDSPAVLTMAXHT-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Adhesives Or Adhesive Processes (AREA)
Description
(2)前記(A)(メタ)アクリル系ブロック共重合体が、式(a1)-(b)-(a2)で表されるトリブロック共重合体である、(1)に記載の光硬化性粘着剤組成物。(重合体ブロック(a1)、重合体ブロック(a2)は前記重合体ブロック(a)と同一の(メタ)アクリル酸エステル重合体ブロックであり、重合体ブロック(a1)、重合体ブロック(a2)は同一であっても異なっていてもよい。)
(3)前記(A)(メタ)アクリル系ブロック共重合体が、メチルメタクリレートをモノマー単位として含む重合体ブロック(a)、ブチルアクリレートをモノマー単位として含む重合体ブロック(b)を含有する(メタ)アクリル系ブロック共重合体である、(1)または(2)に記載の光硬化性粘着剤組成物。
(4)前記(B)反応性の溶媒が、酸素または窒素原子を含む置換基を有する単官能(メタ)アクリレートモノマーである、(1)~(3)のいずれか1つに記載の光硬化性粘着剤組成物。
表1記載の成分を均一に溶解するまで撹拌し、実施例1~7、比較例1の光硬化性粘着剤組成物を調整した。配合は下記表1に記載の通りである。
※1 LK9243: (メタ)アクリル系トリブロック共重合体(製品名「クラリティ LK9243」、重合体ブロック(a)にメチルメタクリレートを用い、重合体ブロック(b)にブチルアクリレート及び2-エチルヘキシルアクリレートを用いた(メタ)アクリル系ブロック共重合体、(株)クラレ製)
※2 LA2140:(メタ)アクリル系トリブロック共重合体(製品名「クラリティ LA2140」、重合体ブロック(a)にメチルメタクリレートを用い、重合体ブロック(b)にブチルアクリレートを用いた(メタ)アクリル系ブロック共重合体、(株)クラレ製)
※3 4HBA:4-ヒドロキシブチルアクリレート
※4 IrgTPO:2,4,6-トリメチルベンゾイル-ジフェニル-フォスフィンオキサイド(製品名「IRGACURETPO」、BASF社製)
※5 P-2M:2-メタクロイロキシエチルアシッドホスフェート(製品名「ライトエステルP-2M」、共栄社化学(株)製)
※6 LA:ラウリルアクリレート
※7 K125:テルペンフェノール樹脂(製品名「YSポリスターK125」、ヤスハラケミカル(株)製)
熱間クリープ試験:
第1の被着体としてPETフィルム1枚、第2の被着体として一端に穴の開いたSUS板1枚を用意し、第1の被着体についてはイソプロピルアルコールにより表面を脱脂し、第2の被着体についてはアセトンにより表面を脱脂した。脱脂した第1の被着体表面に、厚さが100μm、塗布面積が25×25mm2になるように実施例1に係る光硬化性粘着剤組成物を均一に塗布した。次に、第1の被着体に塗布された実施例1に係る光硬化性粘着剤組成物に紫外線(UV)を照射し[照射条件:UV-LEDランプ(波長365nm、照度:1000mW/cm2)、積算光量:3000mJ/cm2]、硬化させた。硬化後速やかに、脱脂済みの第2の被着体の穴の開いた一端とは逆側の部分を、UV光照射により硬化した光硬化性粘着剤組成物を挟むように第1の被着体に貼り合わせ、2kgローラ2往復にて圧締し、試験片を作成した。続いて、この試験片を23℃50%RHの環境下で24時間養生した。養生後、試験片のSUS板の穴にS字フックを取り付け、SUS板側が上になるよう試験片を鉛直に吊り下げた。続いて、PETフィルムの端部に1kgの重りを取り付け、試験片のせん断方向、すなわち鉛直方向に荷重を加えた。荷重をかけた試験片を、80℃に設定した熱風乾燥器(佐竹化学機械工業株式会社製熱風循環恒温乾燥器:41-S4)の天井に前記S字フックを介して取り付け、24時間静置し、熱間クリープ試験を実施した。ほぼずれが生じなかったもの(1.0mm未満)を◎、ずれが小さかったもの(1.0mm以上1.5mm未満)を○、ずれが大きかったもの(1.5mm以上25mm未満)を△、PETフィルムとSUS板が剥がれ重りが落下したものを×として評価した。
Claims (3)
- 熱間クリープ特性に優れた光硬化性粘着剤組成物であって、
(A)ガラス転移温度が50℃以上である(メタ)アクリル酸エステル重合体ブロック(a)5~45質量%、及びガラス転移温度が20℃以下である(メタ)アクリル酸エステル重合体ブロック(b)55~95質量%を含有する(メタ)アクリル系ブロック共重合体と、
(B)前記(A)(メタ)アクリル系ブロック共重合体を溶解し、光重合可能である反応性の溶媒と、
(C)光重合開始剤と、
(D)リン原子を含む置換基を有する(メタ)アクリレートモノマーと、
を含有し、
前記(A)(メタ)アクリル系ブロック共重合体が、式(a1)-(b)-(a2)で表されるトリブロック共重合体であり(重合体ブロック(a1)、重合体ブロック(a2)は前記重合体ブロック(a)と同一の(メタ)アクリル酸エステル重合体ブロックであり、重合体ブロック(a1)、重合体ブロック(a2)は同一であっても異なっていてもよい。)、
前記(D)リン原子を含む置換基を有する(メタ)アクリレートモノマーの添加量が、0.01質量部以上30質量部以下であり、
前記熱間クリープ特性の試験が、イソプロピルアルコールで表面を脱脂した第1の被着体としてのPETフィルムと、アセトンで表面を脱脂した第2の被着体としての一端に穴を有するSUS板とを用意し、前記第1の被着体表面に厚さが100μm、塗布面積が25×25mm 2 になるように前記光硬化性粘着剤組成物を均一に塗布し、紫外線(UV)を前記光硬化性粘着剤組成物に照射し[照射条件:UV-LEDランプ(波長365nm、照度:1000mW/cm 2 )、積算光量:3000mJ/cm 2 ]て硬化後速やかに、前記第2の被着体の前記穴を有する前記一端とは逆側の部分を前記硬化した前記光硬化性粘着剤組成物を挟むように前記第1の被着体に貼り合わせ、2kgローラ2往復にて圧締して作成した試験片を23℃50%RHの環境下で24時間養生した後、前記試験片の前記第2の被着体の前記穴にS字フックを取り付け、前記第2の被着体側が上になるように前記試験片を鉛直に吊り下げ、前記第1の被着体の端部に1kgの重りを取り付け、前記試験片のせん断方向に荷重をかけて80℃に設定した熱風乾燥器の天井に前記S字フックを介して前記試験片取り付けて24時間静置して実施された場合、前記第1の被着体と前記第2の被着体とのずれが1.5mm未満である光硬化性粘着剤組成物。 - 前記(A)(メタ)アクリル系ブロック共重合体が、メチルメタクリレートをモノマー単位として含む重合体ブロック(a)、ブチルアクリレートをモノマー単位として含む重合体ブロック(b)を含有する(メタ)アクリル系ブロック共重合体である、請求項1に記載の光硬化性粘着剤組成物。
- 前記(B)反応性の溶媒が、酸素または窒素原子を含む置換基を有する単官能(メタ)アクリレートモノマーである、請求項1又は2に記載の光硬化性粘着剤組成物。
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