JP7276398B2 - 樹脂組成物、硬化物、成形体及びその製造方法、並びに、フィルムコンデンサ及びその製造方法 - Google Patents
樹脂組成物、硬化物、成形体及びその製造方法、並びに、フィルムコンデンサ及びその製造方法 Download PDFInfo
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- JP7276398B2 JP7276398B2 JP2021167176A JP2021167176A JP7276398B2 JP 7276398 B2 JP7276398 B2 JP 7276398B2 JP 2021167176 A JP2021167176 A JP 2021167176A JP 2021167176 A JP2021167176 A JP 2021167176A JP 7276398 B2 JP7276398 B2 JP 7276398B2
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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Description
本実施形態に係る樹脂組成物は、注型用の樹脂組成物である。本実施形態に係る樹脂組成物を注型することにより成形体を得ることができる。本実施形態に係る樹脂組成物は、硬化性(例えば熱硬化性)の樹脂組成物である。本実施形態に係る硬化物は、本実施形態に係る樹脂組成物の硬化物であり、硬化性の樹脂組成物を硬化させることにより得ることができる。本実施形態に係る樹脂組成物及びその硬化物は、例えば、黒色を呈している。本実施形態に係る硬化物は、素子を封止する封止部として用いることができる。封止部によって素子を封止することにより、水分等によって素子が劣化することを抑制することができる。
硬化性成分は、例えば、硬化性樹脂及び硬化剤を含むことができる。硬化剤を用いることなく硬化性樹脂が硬化可能である場合には、硬化剤を用いなくてもよい。
膨張黒鉛は、黒鉛の結晶構造の層間が拡張された材料であり、例えば、黒鉛以外の物質が黒鉛の層間内に侵入して形成された黒鉛層間化合物である。膨張黒鉛は、例えば、黒鉛材料を酸(硫酸、硝酸等)に浸漬させることで得ることができる。膨張黒鉛は、酸処理を行って得られる膨張可能な黒鉛(Expandable graphite)を示し、膨張黒鉛を熱処理して得られる膨張化黒鉛(Expanded graphite)と区別される。
本実施形態に係る樹脂組成物は、硬化性成分及び膨張黒鉛とは異なる添加剤を含有することができる。添加剤としては、フィラー、消泡剤、難燃剤、カップリング剤、反応希釈剤、可撓性付与剤、顔料、着色剤、溶剤等が挙げられる。
B型粘度計を用いて40℃、60rpmの条件で測定した場合の樹脂組成物の粘度は、樹脂組成物を注型する際に樹脂組成物の充填作業性に更に優れる観点から、8.0Pa・s以下が好ましく、7.0Pa・s以下がより好ましく、5.0Pa・s以下が更に好ましく、3.0Pa・s以下が特に好ましく、2.0Pa・s以下が極めて好ましい。前記粘度は、例えば、1.0Pa・s以上であってもよい。
本実施形態に係る成形体は、素子と、素子を封止する封止部と、を備え、封止部が本実施形態に係る樹脂組成物又はその硬化物を含む。成形体としては、例えば、コンデンサ(フィルムコンデンサ等)、チップインダクタ、リアクトル、トランス、モールドコイル、LSIチップ、ICチップ、センサー(タイヤ空気圧センサー等)、エンジンコントロールユニット(ECU)などの電子部品が挙げられる。
本実施形態に係る成形体の製造方法においては、本実施形態に係る樹脂組成物を注型して成形体を得る。本実施形態に係る成形体の製造方法は、例えば、硬化性の封止材として、本実施形態に係る樹脂組成物を型部材(鋳型、枠体)に供給する樹脂供給工程と、樹脂組成物を硬化し成形体を得る硬化工程と、をこの順に備えている。成形方法としては、真空注型、インサート成形、射出成形、押出成形、トランスファ成形等が挙げられる。
表1及び表2に示す下記成分を混合することにより樹脂組成物を調製した。
ビスフェノールA型エポキシ樹脂、三井化学株式会社製、商品名:エポミックR-139S
ビスフェノールA型エポキシ樹脂、三菱ケミカル株式会社製、商品名:JER834
酸無水物、3or4-メチル-1,2,3,6-テトラヒドロ無水フタル酸、日立化成株式会社製、商品名:HN-2000
塩化ベンザルコニウム、日本油脂株式会社製、商品名:M2-100R
(商品名)GREP-EG、株式会社鈴裕化学製、平均長径:600μm
(商品名)EXP-100S、富士黒鉛工業株式会社製、平均長径:200μm
メラミンシアヌレート、日産化学工業株式会社製、商品名:MC-4000、平均粒径:14μm
カーボンブラック、着色剤、三菱ケミカル株式会社製、商品名:MA-100
結晶シリカ、フミテック株式会社製、商品名:HC-15、平均粒径:12.8μm
結晶シリカ、シベルコ・ジャパン株式会社製、商品名:CA0040、平均粒径:3.65μm
水酸化アルミニウム、日本軽金属株式会社製、商品名:AL-B143、平均粒径:5μm
水酸化マグネシウム、神島化学工業株式会社製、商品名:N-6、平均粒径:1.3μm
消泡剤、シリコーン系消泡剤、信越化学工業株式会社製、商品名:KS-603
カップリング剤、エポキシ基含有シランカップリング剤、ダウコーニング社製、商品名:OFS-6040
難燃剤、ポリリン酸アンモニウム、大八化学工業株式会社製、商品名:TCP
難燃剤、ポリリン酸アンモニウム、クラリアントケミカルズ株式会社製、商品名:Exolit AP462
前記樹脂組成物を用いて下記の物性測定を行った。物性測定は、上述の硬化剤と他成分とを混合した後、速やかに行った。物性測定の結果を表1及び表2に示す。
直径60mmのアルミニウムシャーレ内に前記樹脂組成物を20g注入した。次に、前記樹脂組成物を105℃で8時間熱硬化させて硬化物を得た後、前記硬化物の質量を測定した。続いて、121℃、100%RH、2atmの条件で前記硬化物に37時間吸水させた後、前記硬化物の質量を測定した。下記式により硬化物の吸水率を算出した。
吸水率(質量%)=(吸水後の質量-吸水前の質量)/吸水前の質量
B型回転粘度計(TOKIMEC社製、商品名:BL)を用いて、温度40℃、回転数60rpm(60回転)の条件における前記樹脂組成物の粘度を測定した。温度は、恒温槽(ヤマト科学株式会社製、商品名:BF600)を用いて調整した。
前記樹脂組成物を105℃で8時間熱硬化させて硬化物を得た後、縦125mm×横13.0mm、厚さ5mmの直方体形状に硬化物を加工して試験片を得た。前記試験片を用いて、UL94Vの試験方法に従い難燃性を評価した。UL94Vの判定基準に従い、下部接炎について「V-0」、「V-1」、「V-2」、「V-NOT」(分類不可)の4段階で判定した。「V-0」が最も難燃性が高く、「V-1」、「V-2」及び「V-NOT」の順に難燃性が低下する。
前記樹脂組成物を105℃で8時間熱硬化させて硬化物を得た後、縦5mm×横5mm、厚さ3mmの直方体形状に硬化物を加工して試験片を得た。熱機械分析装置(圧縮TMA測定装置、リガク株式会社製、商品名:TMA8310)を用いて、昇温速度10℃/min、40~180℃、荷重5Nの条件で測定して熱膨張曲線を得た。熱膨張曲線の屈曲線から前記試験片のガラス転移温度(Tg、単位:℃)を求めた。また、ガラス転移温度より低温の領域の傾きから線膨張係数(α1、単位:ppm)を求めた。
Claims (1)
- 硬化性成分と、膨張黒鉛と、シリカと、を含有し、
前記硬化性成分が硬化性樹脂及び硬化剤を含み、
前記硬化剤が酸無水物を含み、
前記硬化性樹脂の含有量が18質量%以上であり、
前記硬化剤の含有量が12~40質量%であり、
前記膨張黒鉛の含有量が2.0質量%以上35質量%未満であり、
前記シリカの含有量が30質量%以上である、注型用の樹脂組成物。
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CN111527121A (zh) | 2020-08-11 |
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