JPWO2013118509A1 - 有機el素子用の面封止剤、これを用いた有機elデバイス、及びその製造方法 - Google Patents
有機el素子用の面封止剤、これを用いた有機elデバイス、及びその製造方法 Download PDFInfo
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- JPWO2013118509A1 JPWO2013118509A1 JP2013557433A JP2013557433A JPWO2013118509A1 JP WO2013118509 A1 JPWO2013118509 A1 JP WO2013118509A1 JP 2013557433 A JP2013557433 A JP 2013557433A JP 2013557433 A JP2013557433 A JP 2013557433A JP WO2013118509 A1 JPWO2013118509 A1 JP WO2013118509A1
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- 239000003822 epoxy resin Substances 0.000 claims abstract description 87
- 150000003839 salts Chemical class 0.000 claims abstract description 36
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 30
- 125000001453 quaternary ammonium group Chemical group 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims description 54
- 125000004432 carbon atom Chemical group C* 0.000 claims description 51
- 125000001424 substituent group Chemical group 0.000 claims description 47
- 238000001723 curing Methods 0.000 claims description 36
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- 125000000217 alkyl group Chemical group 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 21
- 125000003118 aryl group Chemical group 0.000 claims description 17
- 125000000524 functional group Chemical group 0.000 claims description 15
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 12
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Abstract
Description
[1]1分子内に2個以上のエポキシ基を有するエポキシ樹脂(A)と、下記一般式(1)で表される4級アンモニウムイオンの塩(B1)及び下記一般式(2)で表される4級アンモニウムイオンの塩(B2)からなる群から選ばれる少なくとも一種類の化合物からなる硬化促進剤(B)と、を含む有機EL素子用の面封止剤であって、前記面封止剤100重量部に対し前記硬化促進剤(B)を0.1〜10重量部含む、有機EL素子用の面封止剤。
[4]前記一般式(1)のR1、R2、R3の置換基、及び前記一般式(2)のR4、R5、R6の置換基が、それぞれ独立に、炭素数が1〜10のアルキル基、炭素数が1〜10のアルコキシ基、F、Cl、Br、I、NO2、CN、及び下記一般式(5)で表される基からなる群から選ばれる官能基である、[1]〜[3]のいずれかに記載の面封止剤。
[6]さらにシランカップリング剤(C)を含む、[1]〜[5]のいずれかに記載の面封止剤。
[7]前述の[1]〜[6]のいずれかに記載の面封止剤の硬化物。
[8]有機EL素子が配置された表示基板、前記表示基板と対になる対向基板、及び前記表示基板と前記対向基板との間に在り、前記有機EL素子を封止するシール部材、を含む有機ELデバイスであって、前記シール部材は[7]に記載の硬化物である、有機ELデバイス。
[9]前記[8]に記載の有機ELデバイスを備えた、有機ELパネル。
[10]有機EL素子が配置された表示基板を準備する工程と、前記有機EL素子を前記[1]〜[6]のいずれかに記載の面封止剤で覆う工程と、前記面封止剤を加熱硬化する工程と、を含む有機ELデバイスの製造方法。
[12]有機EL素子と、前記有機EL素子と接し、かつ前記有機EL素子を面封止する、[1]〜[6]のいずれかに記載の面封止剤の硬化物からなる硬化物層と、前記硬化物層と接するパッシベーション膜と、を含む有機ELデバイス。
本発明の面封止剤には、エポキシ樹脂(A)と、特定の4級アンモニウムイオンの塩からなる硬化促進剤(B)とが含まれ;さらに、シランカップリング剤(C)などが含まれてもよい。
本発明の面封止剤に含まれるエポキシ樹脂(A)は、1分子内に2個以上のエポキシ基を有するエポキシ樹脂であればよく、分子量などは特に限定されず、分子量分布がないエポキシ樹脂も、分子量分布があるエポキシ樹脂も用いることができる。
本発明の面封止剤に含まれる硬化促進剤(B)は、特定の4級アンモニウムイオンを含む塩(B1またはB2)からなる。
本発明の面封止剤には、シランカップリング剤、チタン系カップリング剤、ジルコニウム系カップリング剤、アルミニウム系カップリング剤などのカップリング剤(C)が含まれてもよい。カップリング剤(C)が含まれる面封止剤は、有機ELデバイスの基板等との密着性が高い。
本発明の面封止剤には、本発明の効果を損なわない範囲で、その他の任意成分(D)が含まれてもよい。その他の任意成分(D)の例には、樹脂成分、充填剤、改質剤、酸化防止剤、安定剤、酸無水物等が含まれる。
本発明の面封止剤には、溶剤(E)が含まれてもよい。溶剤(E)が含まれると、各成分が均一に分散または溶解される。溶剤(E)は、各種有機溶剤であり得る。その例には、トルエン、キシレン等の芳香族溶媒;アセトン、メチルエチルケトン、メチルイソブチルケトン等のケトン系溶媒;エーテル、ジブチルエーテル、テトラヒドロフラン、ジオキサン、エチレングリコ−ルモノアルキルエーテル、エチレングリコ−ルジアルキルエーテル、プロピレングリコールまたはジアルキルエーテル等のエーテル類;N−メチルピロリドン、ジメチルイミダゾリジノン、ジメチルフォルムアルデヒド等の非プロトン性極性溶媒;酢酸エチル、酢酸ブチル等のエステル類等が含まれる。特に、高分子量のエポキシ樹脂(A)を溶解し易い点から、メチルエチルケトン等のケトン系溶媒(ケト基を有する溶媒)がより好ましい。
本発明の面封止剤の含水率は、0.1質量%以下であることが好ましく、0.06質量%以下であることがより好ましい。有機EL素子は水分により劣化しやすい。したがって、面封止剤の含水率をできるだけ低減することが好ましい。面封止剤の含水率は、試料サンプルを約0.1g計量し、カールフィッシャー水分計にて150℃に加熱し、その際に発生する水分量を測定することで求められる(固体気化法)。
本発明の有機ELデバイスは、表示基板上に配置された有機EL素子と、表示基板と対になる対向基板と、表示基板と対向基板との間に在り、有機EL素子を覆う(面封止する)シール部材とを含む。
以下に、実施例及び比較例の面封止剤に添加した原材料を下記に示す。
<エポキシ樹脂>
・ビスフェノールF型エポキシ樹脂:分子量338(YL−983U、ジャパンエポキシレジン社製)
・3官能エポキシ樹脂:分子量592(VG−3101L、プリンテック社製)
・下記式で表す4級アンモニウム塩(1)(King Industry社製)
・1−ベンジル−2−メチルイミダゾール(キュアゾール 1B2MZ、四国化成製)
・2−エチル−4−メチルイミダゾール(キュアゾール 2E4MZ、四国化成製)
・メチルヘキサヒドロ無水フタル酸とヘキサヒドロ無水フタル酸との混合物(リカシッドMH−700、新日本理化製)
<シランカップリング剤>
・3−グリシドキシプロピルトリメトキシシラン(信越化学(株)製 KBM403、1分子当たりのアルコキシ基数:3、分子量:236.3)
窒素で置換したフラスコで、エポキシ樹脂100重量部と、2重量部の4級アンモニウム塩(1)と、4重量部のシランカップリング剤とを、50℃で攪拌混合して、面封止剤を得た。
エポキシ樹脂、酸無水物、硬化促進剤、及びシランカップリング剤を、表1に示す組成比で添加した以外は、実施例1と同様に面封止剤を得た。
E型粘度計(東機産業製 RC−500)にて、25℃、1.0rpmで面封止剤の粘度を測定した。測定は、調製直後のサンプル、25℃で24時間保存後のサンプル、25℃で48時間保存後のサンプルについて行った。測定結果を表1に示す。
無アルカリガラス板の190nm〜800nmの波長領域(可視・紫外光)の光線透過率(バックグラウンドデータ)を測定した。同じ無アルカリガラス板に膜厚20μmで、面封止剤をスクリーン印刷し、これを100℃で30分熱硬化させた。硬化物の190nm〜800nmの波長領域(可視・紫外光)の光線透過率を測定した。その後、硬化物の光線透過率データから、バックグラウンドデータを減算し、面封止剤の硬化物の光線透過率を算出した。評価は380nmの光線透過率で行った。
反応活性発現温度は、45℃に設定したホットプレート上で、面封止剤を複数層熱圧着し、膜厚250〜300μmのシートとした。このシートについて、Haake社製レオメーター(RS150型)で、測定周波数:1Hz、昇温速度:4℃/分、測定温度範囲:40〜150℃で発熱ピークの立ち上がり温度を測定し、前記温度を反応活性発現温度とした。
面封止剤を、予めオゾン処理によって洗浄したガラス基板(7cm×7cm×0.7mm厚)に、スクリーン印刷機(Screen Printer Model 2200、MITANI製)で印刷した。印刷は、乾燥状態の面封止剤が5cm×5cm×3μm厚となるように行った。面封止剤を印刷したガラス基板を、150℃に加熱したホットプレート上で30分間加熱して、面封止剤硬化させた。
面封止剤を、2枚のNaCl結晶板(2センチ角、厚み5mm)の間に封入し、NaCl結晶板同士の間隔が15μmとなるようにした。このサンプルの赤外線透過スペクトルを、FT-IR測定装置で測定した。その後、150℃で30分熱処理し、同様に赤外線透過スペクトルを、FT-IR測定装置で測定した。それぞれの測定スペクトルにおける、エポキシ基の逆対称環伸縮に由来する吸収ピーク(910cm−1付近)高さを、ベンゼン環の環内C-C伸縮に由来する吸収ピーク(1600cm−1付近)高さで除して規格化した。
22 表示基板
24 有機EL素子
26 対向基板
28 面封止層
28−1 シール部材
28−2 パッシベーション膜
28−3 封止材
28−1’ 面封止剤
30 画素電極層
32 有機EL層
34 対向電極層
Claims (12)
- 1分子内に2個以上のエポキシ基を有するエポキシ樹脂(A)と、
下記一般式(1)で表される4級アンモニウムイオンの塩(B1)及び下記一般式(2)で表される4級アンモニウムイオンの塩(B2)からなる群から選ばれる少なくとも一種類の化合物からなる硬化促進剤(B)と、を含む有機EL素子用の面封止剤であって、
前記面封止剤100重量部に対し前記硬化促進剤(B)を0.1〜10重量部含む、有機EL素子用の面封止剤。
R1、R2、R3はそれぞれ独立に、置換基を有してもよい炭素数1〜10のアルキル基、置換基を有してもよい炭素数6〜10のアリール基、または置換基を有してもよい炭素数7〜20のアラルキル基を表し、
Arは置換基を有してもよい炭素数6〜10のアリール基を表す。)
R4、R5、R6はそれぞれ独立に、置換基を有してもよい炭素数1〜10のアルキル基、置換基を有してもよい炭素数6〜10のアリール基、または置換基を有してもよい炭素数7〜20のアラルキル基を表し、
Ra、Rb、Rcはそれぞれ独立に、水素基または炭素数が1〜10のアルキル基、炭素数が1〜10のアルコキシ基、F、Cl、Br、I、NO2、CN、または下記一般式(3)で表される基を表す。)
- 前記一般式(1)のArに結合する置換基が、炭素数が1〜10のアルキル基、炭素数が1〜10のアルコキシ基、及び前記一般式(4)で表される基からなる群から選ばれる官能基である、請求項2に記載の面封止剤。
- 前記塩(B1)または前記塩(B2)の対アニオンが、[CF3SO3]−、[C4F9SO3]−、[PF6]−、[AsF6]−、[Ph4B]−、Cl−、Br−、I−、[OC(O)R16]−(R16は炭素数1〜10のアルキル基を表す)、[SbF6]−、[B(C6F5)4]−、[B(C6H4CF3)4]−、[(C6F5)2BF2]−、[C6F5BF3]−、及び[B(C6H3F2)4]−からなる群から選ばれる、請求項1に記載の面封止剤。
- さらにシランカップリング剤(C)を含む、請求項1に記載の面封止剤。
- 請求項1に記載の面封止剤の硬化物。
- 有機EL素子が配置された表示基板、
前記表示基板と対になる対向基板、
及び前記表示基板と前記対向基板との間に在り、前記有機EL素子を封止するシール部材、を含む有機ELデバイスであって、
前記シール部材は請求項7に記載の硬化物である、有機ELデバイス。 - 請求項8に記載の有機ELデバイスを備えた、有機ELパネル。
- 有機EL素子が配置された表示基板を準備する工程と、
前記有機EL素子を請求項1に記載の面封止剤で覆う工程と、
前記面封止剤を加熱硬化する工程と、を含む有機ELデバイスの製造方法。 - 前記面封止剤の硬化物上に、パッシベーション膜を成膜する工程をさらに有する、請求項10に記載の有機ELデバイスの製造方法。
- 有機EL素子と、
前記有機EL素子と接し、かつ前記有機EL素子を面封止する、請求項1に記載の面封止剤の硬化物からなる硬化物層と、
前記硬化物層と接するパッシベーション膜と、を含む有機ELデバイス。
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US10305058B2 (en) * | 2014-11-11 | 2019-05-28 | Sharp Kabushiki Kaisha | Electroluminescent device and method for producing same |
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DE102016207550A1 (de) | 2016-05-02 | 2017-11-02 | Tesa Se | Funktionalisierte (Co)Polymere für Klebesysteme und Klebebänder |
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Also Published As
Publication number | Publication date |
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US20140367670A1 (en) | 2014-12-18 |
CN104105733A (zh) | 2014-10-15 |
KR101800572B1 (ko) | 2017-11-22 |
KR101682781B1 (ko) | 2016-12-05 |
TWI622603B (zh) | 2018-05-01 |
KR20160143858A (ko) | 2016-12-14 |
TW201335216A (zh) | 2013-09-01 |
KR20140119077A (ko) | 2014-10-08 |
WO2013118509A1 (ja) | 2013-08-15 |
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