JP7119991B2 - 硬化性組成物及び電子機器 - Google Patents
硬化性組成物及び電子機器 Download PDFInfo
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Description
複数のエポキシ基を有するエポキシ化合物(E)とを含み、
イソシアネート基と反応し得るイソシアネート捕捉剤及びエポキシ基と反応し得るエポキシ捕捉剤を含まず、
前記フェノール類は、芳香環に結合した炭素数8以上の鎖式炭化水素基を有している、硬化性組成物にある。
前記電子部品を収容するケース(3)と、
前記ケース内に充填された注型材(4)と、を有し、
前記注型材は、前記の態様の硬化性組成物の硬化物からなる、電子機器(1)にある。
開口(31)を備え、前記電子部品を収容するケース(302)と、
前記開口を覆う蓋部(5)と、
前記ケースと前記蓋部との間に介在し、両者を接着する接着材(6)と、を有し、
前記接着材は、前記の態様の硬化性組成物の硬化物からなる、電子機器(102)にある。
なお、特許請求の範囲及び課題を解決する手段に記載した括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものであり、本発明の技術的範囲を限定するものではない。
前記硬化性組成物に係る実施形態について説明する。硬化性組成物は、図1(a)に示す、フェノール類Phにより保護された複数のイソシアネート基を有するブロックイソシアネート化合物PhIと、図1(b)に示す、複数のエポキシ基を有するエポキシ化合物Eとを含んでいる。また、硬化性組成物には、イソシアネート基と反応し得るイソシアネート捕捉剤及びエポキシ基と反応し得るエポキシ捕捉剤が含まれていない。
図1に示すように、ブロックイソシアネート化合物PhIは、複数のイソシアネート基を備えたイソシアネート化合物に由来する骨格構造と、イソシアネート基に結合した保護基としてのフェノール類とを有している。ブロックイソシアネート化合物としては、例えば、イソシアネート化合物Iと、フェノール類Phとを反応させてなる化合物を使用することができる。
エポキシ化合物(E)は、図1(b)に示すように1分子中に複数のエポキシ基を有している。エポキシ化合物としては、例えば、グリシジルエーテル型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、グリシジルエステル型エポキシ樹脂、ポリエーテル、ポリエステル、ポリブタジエン、ポリウレタンなどのポリマー末端にエポキシ基が結合した高分子量エポキシ樹脂、ナフタレン、ビフェニルなどの多芳香環を有するエポキシ樹脂等を使用することができる。これらのエポキシ化合物は、単独で使用してもよいし、2種以上を併用してもよい。
前記硬化性組成物には、必須成分としてのブロックイソシアネート化合物とエポキシ化合物との他に、前述した作用効果を損なわない範囲で、充填剤、難燃剤、難燃助剤、離型剤、触媒等の添加剤が含まれていてもよい。
本実施形態においては、実施形態1に係る硬化性組成物が注型材として用いられている電子機器の実施形態を説明する。本実施形態に係る電子機器1は、図2に示すように、電子部品2と、電子部品2を収容するケース3と、ケース3内に充填された注型材4とを有している。注型材4は、前記硬化性組成物の硬化物より構成されている。
本実施形態においては、実施形態1に係る硬化性組成物が接着材として用いられている電子機器102の実施形態を説明する。なお、実施形態3以降において用いた符号のうち、既出の実施形態において用いた符号と同一のものは、特に示さない限り、既出の実施形態におけるものと同様の構成要素等を表す。
本実施形態の電子機器102は、電子部品2と、開口31を備え、電子部品2を収容するケース302と、開口31を覆う蓋部5と、ケース302と蓋部5との間に介在し、両者を接着する接着材6とを有している。そして、接着材6は、前記硬化性組成物の硬化物より構成されている。
硬化性組成物の組成の具体例を説明する。本例では、まず、表1に示すポリオールとイソシアネートとをスズ触媒の存在下で反応させ、イソシアネート化合物としてのウレタンプレポリマーを準備した。表1の「イソシアネート基含有量」には、各ウレタンプレポリマー中のイソシアネート基の含有量を示した。なお、ウレタンプレポリマーの作製に使用した化合物は、具体的には以下の通りである。
・水素化ポリブタジオール:日本曹達株式会社製「GI-1000」
・変性MDI:東ソー株式会社製「ミリオネートMTL」
・スズ触媒:ジラウリン酸ジブチルスズ
・ビスフェノールF型エポキシ樹脂:三菱ケミカル株式会社製「jER807」 エポキシ当量168
・可塑剤:株式会社ジェイ・プラス製「TOTM」 トリメリット酸トリス(2-エチルヘキシル)
・触媒:城北化学工業株式会社製「JC-263」 トリフェニルホスフィン
試験剤を60℃の環境下に2日間静置した後の粘度を測定し、調整直後の粘度に対する2日静置後の粘度の比率を算出した。各試験剤における調整直後の粘度に対する2日静置後の粘度の比率は表2及び表3の「保存安定性」欄に示した通りであった。保存安定性の評価においては、2日静置後の粘度が調製直後の1.5倍以下の場合を保存安定性が良好であるため合格と判断し、1.5倍を超える場合を保存安定性が低いため不合格と判断した。
試験剤を150℃で1時間加熱した後、室温まで自然に冷却した。得られた硬化物の表面を手で触り、タックの有無を評価した。表2及び表3の「硬化性」欄には、硬化物の表面がねばつかない場合(つまり、タックがない場合)に記号「A」、硬化物の表面がねばつく場合に記号「B」、試験材が十分に硬化しておらず、未硬化の試験材が手に付着する場合に記号「C」を記載した。硬化性の評価においては、記号「A」及び記号「B」の場合を硬化性が良好であるため合格と判断し、記号「C」の場合を硬化性に劣るため不合格と判断した。
試験剤を150℃で1時間加熱した後、室温まで自然に冷却した。得られた硬化物の臭いを嗅ぎ、異臭の有無を評価した。表2及び表3の「ブロック剤の揮発性」欄には、硬化物から異臭が感じられない場合に記号「A」、硬化物から異臭が感じられる場合に記号「B」を記載した。ブロック剤の揮発性の評価においては、硬化物から異臭が感じられない記号「A」の場合をブロック剤の揮発量が少ないため合格と判断し、異臭が感じられる記号「B」の場合をブロック剤が揮発しているため不合格と判断した。
E エポキシ化合物
C 硬化物
1、102 電子機器
2 電子部品
3、302 ケース
4 注型材
5 蓋部
6 接着材
Claims (6)
- フェノール類(Ph)により保護された複数のイソシアネート基を有するブロックイソシアネート化合物(PhI)と、
複数のエポキシ基を有するエポキシ化合物(E)とを含み、
イソシアネート基と反応し得るイソシアネート捕捉剤及びエポキシ基と反応し得るエポキシ捕捉剤を含まず、
前記フェノール類は、芳香環に結合した炭素数8以上の鎖式炭化水素基を有している、硬化性組成物。 - 前記ブロックイソシアネート化合物は、ウレタンプレポリマーに由来する骨格構造を有している、請求項1に記載の硬化性組成物。
- 前記イソシアネート基の含有量は、モル比において前記エポキシ基の含有量の0.8~1.2倍である、請求項1または2に記載の硬化性組成物。
- 前記鎖式炭化水素基は、フェノール性水酸基に対してメタ位に配置されている、請求項1~3のいずれか1項に記載の硬化性組成物。
- 電子部品(2)と、
前記電子部品を収容するケース(3)と、
前記ケース内に充填された注型材(4)と、を有し、
前記注型材は、請求項1~4のいずれか1項に記載の硬化性組成物の硬化物(C)からなる、電子機器(1)。 - 電子部品(2)と、
開口(31)を備え、前記電子部品を収容するケース(302)と、
前記開口を覆う蓋部(5)と、
前記ケースと前記蓋部との間に介在し、両者を接着する接着材(6)と、を有し、
前記接着材は、請求項1~4のいずれか1項に記載の硬化性組成物の硬化物(C)からなる、電子機器(102)。
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CN201980085725.6A CN113228203A (zh) | 2018-12-27 | 2019-11-18 | 固化性组合物和电子设备 |
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BE790295A (fr) * | 1971-10-22 | 1973-04-19 | Bayer Ag | Matieres plastiques elastifiees |
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JPS60262818A (ja) * | 1984-06-08 | 1985-12-26 | Idemitsu Petrochem Co Ltd | エポキシ樹脂組成物 |
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JP2620233B2 (ja) * | 1987-03-30 | 1997-06-11 | 旭電化工業株式会社 | 硬化性エポキシブロックドウレタン組成物 |
DE19816570A1 (de) * | 1998-04-15 | 1999-10-21 | Bayer Ag | Reaktivsysteme und ihre Verwendung zur Herstellung von Beschichtungen, Klebstoffen, Dichtungsmassen, Vergußmassen oder Formteilen |
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WO2015025776A1 (ja) * | 2013-08-23 | 2015-02-26 | 三井化学株式会社 | ブロックイソシアネート、塗料組成物、接着剤組成物および物品 |
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