JP2022151811A - 粘着フィルム、それを含む光学部材およびそれを含む光学表示装置 - Google Patents
粘着フィルム、それを含む光学部材およびそれを含む光学表示装置 Download PDFInfo
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- JP2022151811A JP2022151811A JP2022047095A JP2022047095A JP2022151811A JP 2022151811 A JP2022151811 A JP 2022151811A JP 2022047095 A JP2022047095 A JP 2022047095A JP 2022047095 A JP2022047095 A JP 2022047095A JP 2022151811 A JP2022151811 A JP 2022151811A
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- adhesive film
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- adherend
- monomer
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- 230000006866 deterioration Effects 0.000 description 1
- WCRDXYSYPCEIAK-UHFFFAOYSA-N dibutylstannane Chemical compound CCCC[SnH2]CCCC WCRDXYSYPCEIAK-UHFFFAOYSA-N 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- WHGNXNCOTZPEEK-UHFFFAOYSA-N dimethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](C)(OC)CCCOCC1CO1 WHGNXNCOTZPEEK-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- WIEGKKSLPGLWRN-UHFFFAOYSA-N ethyl 3-oxobutanoate;titanium Chemical compound [Ti].CCOC(=O)CC(C)=O WIEGKKSLPGLWRN-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 238000001029 thermal curing Methods 0.000 description 1
- 125000004001 thioalkyl group Chemical group 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- QHGNHLZPVBIIPX-UHFFFAOYSA-N tin(ii) oxide Chemical class [Sn]=O QHGNHLZPVBIIPX-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
Description
P1は、粘着フィルムと被着体との試験片で測定された前記被着体に対する前記粘着フィルムの初期剥離強度(単位:gf/inch)であり、
P2は、粘着フィルムと被着体との試験片に光照射した後の前記被着体に対する前記粘着フィルムの剥離強度(単位:gf/inch))である。
P1は、粘着フィルムと被着体との試験片で測定された前記被着体に対する前記粘着フィルムの初期剥離強度(単位:gf/inch)であり、
P3は、粘着フィルムと被着体とを粘着させて製造された試験片を、25℃および相対湿度50%RHで7日放置した後の前記粘着フィルムの前記被着体に対する剥離強度(単位:gf/inch)である。
P1は、粘着フィルムと被着体との試験片で測定された被着体に対する粘着フィルムの初期剥離強度(単位:gf/inch)であり、
P2は、粘着フィルムと被着体との試験片に光照射した後の被着体に対する粘着フィルムの剥離強度(単位:gf/inch))である。
P1は、粘着フィルムと被着体との試験片で測定された被着体に対する粘着フィルムの初期剥離強度(単位:gf/inch)であり、
P3は、粘着フィルムと被着体との試験片を、25℃および相対湿度50%RHで7日放置した後の被着体に対する粘着フィルムの剥離強度(単位:gf/inch)である。
(メタ)アクリル系共重合体は、粘着フィルムのマトリックスを形成し、硬化剤によって硬化されることにより、粘着フィルムの初期剥離強度を提供することができる。(メタ)アクリル系共重合体は、光照射後に芳香族含有一官能以上のモノマーと一緒に粘着フィルムのモジュラスおよび凝集力向上の助けにもなり得る。
硬化剤は、(メタ)アクリル系共重合体を熱硬化させて粘着フィルムのマトリックスを形成し、粘着フィルムの初期剥離強度の提供に役立ち得る。
芳香族含有一官能以上のモノマーは、芳香族基と開始剤によって反応し得る1個以上の官能基とを有する。「芳香族基」は、炭素数6~50の単環の芳香族基、多環の芳香族基または複素環官能基を意味し得る。好適には、芳香族基は、炭素数6~50の単環または多環の芳香族基である。例えば、芳香族基は、置換または非置換の、ベンジル基、フェニル基、ビフェニル基、テルフェニル基、ナフタレニル基等を意味し得る。また、上記「官能基」は、ビニル基または(メタ)アクリレート基を意味し得、光照射による硬化時に粘着フィルムが収縮し過ぎることを効果的に防ぐことができる。
開始剤は、芳香族含有一官能以上のモノマーを硬化させる役割を果たし、これにより、光照射による粘着フィルムの物理的変化を提供することができる。開始剤は、光ラジカル開始剤およびカチオン光開始剤の1種以上を含み、熱開始剤をさらに含むことができる。
窒素ガスが還流し、温度調節が容易になるように冷却装置が設けられた1Lの反応器に、溶媒である酢酸エチルを添加した。n-ブチルアクリレート(BA)85モル%、メチルアクリレート(MA)10モル%、4-ヒドロキシブチルアクリレート(4HBA)4モル%、およびアクリル酸(AA)1モル%を含む単量体混合物100重量部を、上記反応器に添加した。単量体混合物に窒素ガスを30分間投入して酸素を除去した後、反応器の内部温度を62℃に維持した。単量体混合物を均一に攪拌し、開始剤であるV-601(アゾ系ラジカル開始剤,富士フイルム和光純薬株式会社製)0.08重量部を投入し、62℃で8時間反応させて、(メタ)アクリル系共重合体(重量平均分子量:1,298,112g/mol、ガラス転移温度:-50℃)を製造した。溶媒である酢酸エチルを添加して、(メタ)アクリル系共重合体溶液(固形分重量:30重量%)を製造した。
製造例1において、各単量体の含有量を下記表1(単位:モル%)のように変更したことを除いては、製造例1と同様の方法で、(メタ)アクリル系共重合体溶液を製造した。
固形分基準で、製造例1で製造された(メタ)アクリル系共重合体(Tg:-50℃)100重量部、硬化剤としてTD-75(イソシアネート系硬化剤、綜研化学株式会社製)0.5重量部と、Hardener M-2(アルミニウムキレート系硬化剤、サイデン化学株式会社製)0.3重量部、芳香族含有一官能モノマーとしてM-140(エチレングリコールフェニルエーテルアクリレート、ミウォンスペシャリティーケミカル社製、ホモポリマーのTg:7℃)60重量部、開始剤としてIrgacure TPO(BASF社製、リン系光開始剤)0.5重量部を添加し、硬化促進剤として促進剤S(スズ系硬化促進剤、綜研化学株式会社製)0.2重量部を添加し、メチルエチルケトンを添加して、希釈して粘着剤組成物(固形分25重量%)を製造した。
実施例1で各成分の種類および/または含有量(重量部)を下記表2のように変更したことを除いては、実施例1と同様の方法で、粘着フィルム含有シートを製造した。
固形分基準で、製造例4で製造された(メタ)アクリル系共重合体(Tg:-30℃)100重量部、硬化剤としてTD-75(イソシアネート系硬化剤、綜研化学株式会社製)0.5重量部とBXX-4805(アルミニウムキレート系硬化剤,サムヨンインク社)0.5重量部、芳香族含有一官能モノマーのエチレングリコールフェニルエーテルアクリレート60重量部、開始剤としてIrgacure TPO(BASF社,リン系光開始剤)0.5重量部を添加し、メチルエチルケトンを添加して、希釈させて粘着剤組成物(固形分25重量%)を製造した。
実施例9において、各成分の種類および/または含有量を下記表3のように変更したことを除いては、実施例9と同じ方法で粘着フィルム含有シートを製造した。
モノマーA:ベンジルアクリレート
モノマーB:エチレングリコールフェニルエーテルアクリレート
モノマーC:フェノキシベンジルアクリレート
モノマーD:ビフェニルメチルアクリレート
モノマーE:1-ナフチルアクリレート
モノマーF:メチルアクリレート
モノマーG:n-ブチルメタクリレート
モノマーH:ステアリルメタクリレート
モノマーI:イソボルニルアクリレート
モノマーJ:ラウリルアクリレート
比較例1~比較例5
実施例1において、各成分の種類および/または含有量を下記表2のように変更したことを除いては、実施例1と同様の方法で、粘着フィルム含有シートを製造した。
実施例9において、各成分の種類および/または含有量を下記表3のように変更したことを除いては、実施例9と同じ方法で粘着フィルム含有シートを製造した。
○:密着するまでの時間が3秒未満(濡れ性が優れる)
△:密着するまでの時間が3秒以上5秒未満(濡れ性が良い)
×:密着するまでの時間が5秒以上(使用不可能)
Claims (21)
- (メタ)アクリル系共重合体、硬化剤、芳香族含有一官能以上のモノマー、および開始剤を含む粘着剤組成物から形成されてなる粘着フィルムであって、
粘着フィルムと被着体との試験片で測定された前記被着体に対する前記粘着フィルムの初期剥離強度が0gf/inch超100gf/inch以下で、
粘着フィルムと被着体との試験片に光照射した後の前記被着体に対する前記粘着フィルムの剥離強度が300gf/inch以上である、粘着フィルム。 - 前記P1は、0gf/inch超100gf/inch以下である、請求項1に記載の粘着フィルム。
- 前記P2は、300gf/inch以上である、請求項1に記載の粘着フィルム。
- 25℃における貯蔵モジュラスが50kPa以下である、請求項1~4のいずれか1項に記載の粘着フィルム。
- 前記芳香族含有一官能以上のモノマーのホモポリマーのガラス転移温度は、前記(メタ)アクリル系共重合体のガラス転移温度よりも高い、請求項1~6のいずれか1項に記載の粘着フィルム。
- 前記芳香族含有一官能以上のモノマーのホモポリマーのガラス転移温度と、前記(メタ)アクリル系共重合体のガラス転移温度との差は、20℃以上である、請求項1~7のいずれか1項に記載の粘着フィルム。
- 前記芳香族含有一官能以上のモノマーは、ホモポリマーのガラス転移温度が-20℃以上である、請求項1~9のいずれか1項に記載の粘着フィルム。
- 前記芳香族含有一官能以上のモノマーは、前記(メタ)アクリル系共重合体100重量部に対して30重量部~150重量部で含まれる、請求項1~10のいずれか1項に記載の粘着フィルム。
- 前記(メタ)アクリル系共重合体は、ガラス転移温度(Tg)が-10℃以下である、請求項1~11のいずれか1項に記載の粘着フィルム。
- 前記(メタ)アクリル系共重合体は、アルキル基含有(メタ)アクリル系単量体および水酸基含有(メタ)アクリル系単量体を含む単量体混合物の共重合体を含み、前記水酸基含有(メタ)アクリル系単量体は、前記単量体混合物中の単量体の全モル数に対して0.1モル%~10モル%で含まれる、請求項1~12のいずれか1項に記載の粘着フィルム。
- 前記単量体混合物は、ホモポリマーのガラス転移温度が-80℃以上の(メタ)アクリル系単量体を含む、請求項13に記載の粘着フィルム。
- 前記単量体混合物は、カルボン酸基含有単量体をさらに含む、請求項13または14に記載の粘着フィルム。
- 前記硬化剤は、イソシアネート系硬化剤と金属キレート系硬化剤との混合物を含む、請求項1~15のいずれか1項に記載の粘着フィルム。
- 前記開始剤は光ラジカル開始剤および光カチオン開始剤の少なくとも一方を含む、請求項1~16のいずれか1項に記載の粘着フィルム。
- 前記粘着剤組成物は、前記(メタ)アクリル系共重合体100重量部、前記硬化剤0.01重量部~8重量部、前記芳香族含有一官能以上のモノマー30重量部~150重量部、前記開始剤0.03重量部~7.5重量部を含む、請求項1~17のいずれか1項に記載の粘着フィルム。
- フレキシブルパネルおよび前記フレキシブルパネルの少なくとも一面に形成された粘着フィルムを含み、前記粘着フィルムは、請求項1~18のいずれか1項に記載の粘着フィルムを含む、光学部材。
- 前記光学部材は、フレキシブル基板を含む前記フレキシブルパネル、前記フレキシブル基板の下部面に積層された前記粘着フィルム、および前記粘着フィルムの下部面に積層された保護層を含む、請求項19に記載の光学部材。
- 請求項1~18のいずれか1項に記載の粘着フィルムを含む、光学表示装置。
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