JP7458479B2 - 複合体及び複合体の製造方法 - Google Patents
複合体及び複合体の製造方法 Download PDFInfo
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
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- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
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- C04B41/4525—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application applied from the molten state ; Thermal spraying, e.g. plasma spraying using a molten bath as vehicle, e.g. molten borax
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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Description
複合体の理論密度=窒化ホウ素の真密度+樹脂の真密度×(1-窒化ホウ素のかさ密度/窒化ホウ素の真密度)
[多孔質構造を有する窒化物焼結体の調製]
容器に、アモルファス窒化ホウ素粉末(デンカ株式会社製、酸素含有量:1.5%、窒化ホウ素純度:97.6%、平均粒径:6.0μm)が40.0質量%、六方晶窒化ホウ素粉末(デンカ株式会社製、酸素含有量:0.3%、窒化ホウ素純度:99.0%、平均粒径:30.0μm)が60.0質量%となるようにそれぞれ測り取り、焼結助剤(ホウ酸、炭酸カルシウム)を加えた後に有機バインダー、及び水を加え混合後、乾燥造粒し、窒化物の混合粉末を調製した。
容器に、シアネート基を有する化合物が80質量部、ビスマレイミド基を有する化合物が20質量部、エポキシ基を有する化合物が50質量部となるように測り取り、上記3種の化合物合計量100質量部に対して、ホスフィン系硬化剤を1質量部及びイミダゾール系硬化剤を0.01質量部加えて混合した。なお、エポキシ樹脂が室温で固体状態であったため、80℃程度に加熱した状態で混合した。得られた熱硬化性組成物の100℃における粘度は、10mPa・秒であった。
シアネート基を有する化合物:ジメチルメチレンビス(1,4-フェニレン)ビスシアナート(三菱ガス化学株式会社製、商品名:TA-CN)
ビスマレイミド基を有する化合物:N,N’-[(1-メチルエチリデン)ビス[(p-フェニレン)オキシ(p-フェニレン)]]ビスマレイミド(ケイ・アイ化成株式会社製、商品名:BMI-80)
エポキシ基を有する化合物:1,6-ビス(2,3-エポキシプロパン-1-イルオキシ)ナフタレン(DIC株式会社製、商品名:HP-4032D)
ベンゾオキサジン基を有する化合物:ビスフェノールF型ベンゾオキサジン(四国化成工業株式会社製、商品名:F-a型ベンゾオキサジン)
ホスフィン系硬化剤:テトラフェニルホスホニウムテトラ-p-トリルボレート(化学株式会社製、商品名:TPP-MK)
イミダゾール系硬化剤:1-(1-シアノメチル)-2-エチル-4-メチル-1H-イミダゾール(四国化成工業株式会社製、商品名:2E4MZ-CN)
金属触媒:ビス(2,4-ペンタンジオナト)亜鉛(II)(東京化成株式会社)
上述のとおり調製した窒化物焼結体に、上述のとおり調製した熱硬化性組成物を以下の方法で含浸させた。まず、真空加温含浸装置(株式会社協真エンジニアリング製、商品名:G-555AT-R)に、上記窒化物焼結体と、容器に入れた上記熱硬化性組成物とを収容した。次に、温度:100℃、及び圧力:15Paの条件下で、装置内を10分間脱気した。脱気後、同条件に維持したまま、上記窒化物焼結体を上記熱硬化性組成物の加熱溶融物に40分間浸漬し、熱硬化性組成物を上記窒化物焼結体に含浸(真空含浸)させた。
真空含浸の後、加圧含浸をさせずに、半硬化のための加熱処理を行ったこと、及び冷却工程における圧力条件及び降温速度を表1に示すように変更したこと以外は、実施例1と同様にして、複合体を調製した。
冷却工程における圧力条件及び降温速度を表1に示すように変更したこと以外は、実施例1と同様にして、複合体を調製した。
8時間の加熱処理の後の冷却を加圧条件下ではなく、大気圧下で行ったこと以外は、実施例1と同様にして、複合体を調製した。
8時間の加熱処理の後の冷却を加圧条件下ではなく、大気圧下で行い、かつ、降温速度を表1に示すように変更したこと以外は、実施例1と同様にして、複合体を調製した。
上述のようにして得られた各複合体について、窒化ホウ素焼結体の全細孔体積に占める半硬化物の割合を決定した。具体的には、窒化物焼結体の全細孔に上記半硬化物が含浸された時の理論密度D0(単位:g/cm3)と、窒化物焼結体の体積及び質量から求められるかさ密度D(単位:g/cm3)と、上記複合体の体積及び質量から求められるかさ密度D(単位:g/cm3)と、を利用し、上記式(II)に基づいて算出した。
上述のようにして得られた各複合体シートについて絶縁破壊電圧の評価を行った。具体的には、上記複合体シートの両面に2枚の導電性テープを張り付け、測定サンプルを調製した。得られた測定サンプルを対象として、JIS C2110-1:2016にしたがって、耐圧試験器(菊水電子工業株式会社製、装置名:TOS-8700)を用い、絶縁破壊電圧を測定した。測定結果から、以下の基準で絶縁性を評価した。結果を表1に示す。
A:絶縁破壊電圧が11kV以上である。
B:絶縁破壊電圧が8.0kV以上11kV未満である。
C:絶縁破壊電圧が4.5kV以上8.0kV未満である。
D:絶縁破壊電圧が4.5kV未満である。
上述のようにして得られた複合体シートを、2枚の銅板間に上記複合体を配置し、200℃及び5MPaの条件下で5分間加熱及び加圧して、更に200℃及び大気圧の条件下で2時間加熱して得られる積層体を調製し、これを測定対象とした。JIS K 6854-1:1999「接着剤-はく離接着強さ試験方法」にしたがって、90°はく離試験を行い、20℃における複合体のピール強度を、万能試験機(株式会社エーアンドディ製、商品名:RTG-1310)を用いて求めた。試験速度:50mm/分、ロードセル:5kN、測定温度:室温(20℃)の条件で測定を行って、凝集破壊部分の面積を測定した。測定結果から、以下の基準で接着性を評価した。結果を表1に示す。なお、凝集破壊部分とは、複合体が破壊した部分の面積である。
A:凝集破壊部分の面積比率が96面積%以上である。
B:凝集破壊部分の面積比率が95面積%以上96面積%未満である。
C:凝集破壊部分の面積比率が70面積%以上95面積%未満である。
D:凝集破壊部分の面積比率が70面積%未満である。
Claims (6)
- 樹脂含浸体を熱硬化性組成物の加熱溶融物中に浸漬させた状態で、加圧条件下で25℃まで冷却する冷却工程を備え、
前記冷却工程における圧力が2.0MPa以上であり、
前記冷却工程における降温速度が15℃/分以下であり、
前記樹脂含浸体は、多孔質構造を有する窒化ホウ素焼結体と、前記窒化ホウ素焼結体に含浸された熱硬化性組成物の半硬化物と、を有し、
前記熱硬化性組成物は、シアネート基を有する化合物、ビスマレイミド基を有する化合物及びエポキシ基を有する化合物と、ホスフィン系硬化剤及びイミダゾール系硬化剤と、を含有し、
回転式粘度計を用いて、せん断速度が10(1/秒)の条件下で測定される前記熱硬化性組成物の100℃における粘度が、3~50mPa・秒である、
複合体の製造方法。 - 前記冷却工程における圧力が3.0MPa以上である、請求項1に記載の製造方法。
- 前記冷却工程における圧力が4.0MPa以上であり、前記冷却工程における高温速度が0.83℃/分以下である、請求項1に記載の製造方法。
- 多孔質構造を有する窒化ホウ素焼結体を熱硬化性組成物の加熱溶融物中に浸漬させた状態で、前記熱硬化性組成物を半硬化させて前記樹脂含浸体を得る樹脂含浸体の調製工程を更に備える、請求項1~3のいずれか一項に記載の製造方法。
- 前記調製工程が、前記窒化ホウ素焼結体を前記熱硬化性組成物の加熱溶融物中に浸漬させた状態で、加圧条件下に置くことを含む、請求項4に記載の製造方法。
- 前記冷却工程における圧力が前記調製工程における圧力よりも大きい、請求項4又は5に記載の製造方法。
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JP2020085841 | 2020-05-15 | ||
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PCT/JP2021/018244 WO2021230323A1 (ja) | 2020-05-15 | 2021-05-13 | 複合体及び複合体の製造方法 |
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JPH046907Y2 (ja) * | 1986-01-29 | 1992-02-25 | ||
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JP3287202B2 (ja) * | 1994-12-13 | 2002-06-04 | トヨタ自動車株式会社 | 窒化珪素質セラミックス基複合材及びその製造方法 |
JP2007269019A (ja) * | 2006-03-10 | 2007-10-18 | Asahi Kasei Chemicals Corp | 結晶性熱可塑性樹脂の射出成形法 |
US10087112B2 (en) | 2013-06-03 | 2018-10-02 | Denka Company Limited | Resin-impregnated boron nitride sintered body and use for same |
JP7053579B2 (ja) * | 2017-03-29 | 2022-04-12 | デンカ株式会社 | 伝熱部材及びこれを含む放熱構造体 |
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JP2015063110A (ja) | 2013-09-26 | 2015-04-09 | 世紀株式会社 | 二重ピストン機構で働くバルブピンを用いた射出成形装置及びその方法 |
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EP4147845A1 (en) | 2023-03-15 |
US20230271888A1 (en) | 2023-08-31 |
JPWO2021230323A1 (ja) | 2021-11-18 |
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