JP2006257392A - 改良窒化ホウ素組成物及び該組成物を配合したポリマー系組成物 - Google Patents
改良窒化ホウ素組成物及び該組成物を配合したポリマー系組成物 Download PDFInfo
- Publication number
- JP2006257392A JP2006257392A JP2005343606A JP2005343606A JP2006257392A JP 2006257392 A JP2006257392 A JP 2006257392A JP 2005343606 A JP2005343606 A JP 2005343606A JP 2005343606 A JP2005343606 A JP 2005343606A JP 2006257392 A JP2006257392 A JP 2006257392A
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- Prior art keywords
- boron nitride
- coupling agent
- zirconate
- composition
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
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- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
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- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
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- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
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- Health & Medical Sciences (AREA)
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- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Birds (AREA)
- Inorganic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dermatology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
【解決手段】 ジルコネートカップリング剤、アルミン酸ジルコニウムカップリング剤、アルミネートカップリング剤及びこれらの混合物の1種以上を含むコーティング層で表面を処理した窒化ホウ素組成物。この窒化ホウ素組成物を90重量%以下のレベルでポリマーコンパウンドの充填材として使用すれば35W/Mk以下の熱伝導率を得ることができる。
【選択図】 図1
Description
出発原料としてのBN成分は、当技術分野で公知の方法で製造される結晶性又は部分結晶性の窒化ホウ素粒子からなる。その例としては、米国特許第6652822号に記載のプラズマガスを利用したプロセスで製造したミクロンサイズ域の球状BN粒子、米国特許出願公開第2001/0021740号に記載のバインダーで結合した後噴霧乾燥した不規則非球状BN粒子からなる球状窒化ホウ素凝集体を含むhBN粉末、米国特許第5898009号及び同第6048511号に記載のプレス法で製造したBN粉末、米国特許出願公開第2005/0041373号に記載のBN凝集粉末、米国特許出願公開第20040208812号に記載の熱拡散係数の高いBN粉末、並びに米国特許第6951583号に記載の高度に層剥離したBN粉末がある。
本発明のBN粉末は、一実施形態では、約0.5〜約10重量%の有機金属カップリング剤で官能化又は被覆する。別の実施形態では、BNを約1〜約5重量%の有機金属カップリング剤で被覆する。
一実施形態では、カップリング剤に、開始剤、分散剤、消泡剤及び接着促進剤を始めとする添加剤を適宜添加してもよい。開始剤の例としては、熱開始剤、化学開始剤、電子ビーム開始剤及び光開始剤がある。
本発明のBN組成物の製造方法としては、乾式法及び湿式法を含め様々な方法がある。
上記いずれかの方法で製造したBN組成物は粉末形態で使用してもよいし、或いはIPA、メタノール、エタノールなどの水性又は非水性媒質中約60〜80重量%の固体BNを含むペーストの形態にしてもよい。ポリマーコンパウンドにおいて、粉末又はペースト形態のBNは、約1〜約25W/mKの熱伝導率が得られるように、ポリエステル、溶融処理の可能なポリマー、フェノール樹脂、シリコーンポリマー(例えば、シリコーンゴム)、アクリル樹脂、ワックス、熱可塑性ポリマー、低分子量流体又はエポキシ成形用コンパウンドのようなポリマーマトリックス成分と共に、コンパウンドの総重量の30〜80重量%のBNの量で使用される。一実施形態では、ジルコネートで表面処理したBNは、熱伝導率を最高37.5W/mK又はそれ以上に高めるために90%以下のレベルで充填材として使用される。
本例では、Kenrich社のKen−React(登録商標)KZ TPP(登録商標)ジルコネートカップリング剤1部をトルエン1000部に溶解した後、混合物に100部のPT120(平均粒径12μのBN粉末)を添加する。混合物を約10分間攪拌した後、吸引濾過でトルエン溶媒を除去する。
PT110 BN粉末をHenschelミキサーのような高速攪拌機に添加し、次いでBN粒子の均一な混合/被覆のために撹拌を続けながらKen−React(登録商標)KZ TPP(登録商標)ジルコネートカップリング剤をゆっくりミキサーに加えた。この表面官能化BNを次いで潤滑材料又は熱伝導性複合材の充填材として使用する。
まずPTX60 BN粉末を約15〜60分間V型ブレンダー処理によって1.44重量%のKen−React(登録商標)KZ TPP(登録商標)ジルコネートで被覆する。次に、ブレンドした粉末を、FlackTekスピードミキサーを用いて約3500rpmで約20秒間シリコーン流体(Dow Corning 200流体;100cSt)と混合する。Advanced Rheometer 2000(TA Instruments)を用いて粘度(ポアズ)を測定する。様々な表面処理BNレベルで得られた結果を表1に示す。
これらの例では、処理及び未処理BN充填材を含むポリマー複合材を調製して、熱伝導率を測定する。これらの例では、まずBN粉末を約15〜60分間V型ブレンダー処理によってKen−React(登録商標)KZ TPP(登録商標)ジルコネートと混合して処理粉末を調製する。次に、処理BN粉末を、FlackTekスピードミキサーを用いて約3500rpmで27重量%のSylgard 184シリコーン樹脂及び3重量%の硬化剤Sylgard 184と混合する。混合物を3”×6”の矩形金型に入れ、125℃で45分間プレスして厚さ0.5〜1.5mmのパッドを形成する。バルク熱伝導率(W/mK)をHot Disk(登録商標)Thermal Constants Analyzerで測定する。結果を表2に示す。
以下の表3に示す例では、PTX60 BN粉末をKen−React(登録商標)KZ TPP(登録商標)ジルコネートとV型ブレンダー処理した後、FlackTekスピードミキサーを用いて約3500で約20秒間シリコーン流体(Dow Corning 200流体;100CST)と混合する。Advanced Rheometer 2000(TA Instruments)を用いて粘度(ポアズ)を測定する。また、被覆BNを約3500rpmのFlackTekスピードミキサーで35〜60重量%のSylgard 184シリコーン樹脂及び3.5〜6.0重量%の硬化剤Sylgard 184(いずれもDow Corning社製)と混合する。球状BNの充填材含有量は35〜59重量%(20〜40体積%)の範囲である。混合物を3”×6”の矩形金型に入れ、125℃で45分間プレスして、厚さ0.5〜1.5mmのパッドを形成する。Hot Disk(登録商標)Thermal Constants Analyzerでバルク熱伝導率を測定する。
例10〜26と同様に試料を調製し、結果を表5及び図1に示す。これらは、ジルコネートカップリング剤によるBNの表面官能化がポリマーコンパウンドの粘度の低減に役立ち、BN充填材の添加量を高めることができ、そのため材料全体の熱伝導率が向上することを立証している。例27及び29では、未処理BN粉末PTX60をV型ブレンダー処理せずに、入手したままの状態で使用する。
被覆/官能化剤としてポリマー樹脂を用いるこれらの比較例では、球状BN PTX60を0〜15重量%のシリコーン流体(Dow Corning 200流体;5CST)とV型ブレンダー処理し、さらにFlackTekスピードミキサーを用いて約3500で約20秒間シリコーン流体(Dow Corning 200流体;100CST)と混合する。Advanced Rheometer 2000(TA Instruments)を用いて粘度(ポアズ)を測定する。
Claims (12)
- ジルコネートカップリング剤、アルミン酸ジルコニウムカップリング剤、アルミネートカップリング剤及びこれらの混合物の1種以上を含むコーティング層で表面を処理した窒化ホウ素粉末を含んでなる窒化ホウ素組成物。
- 前記コーティング層がジルコネートカップリング剤、アルミン酸ジルコニウムカップリング剤、アルミネートカップリング剤及びこれらの混合物の1種以上を約0.5〜約10重量%含む、請求項1記載の窒化ホウ素組成物。
- 前記コーティング層がジルコネートカップリング剤を約1〜約5重量%含む、請求項1又は請求項2記載の窒化ホウ素組成物。
- 前記ジルコネートカップリング剤が、エチレン性不飽和ジルコネート含有化合物、ネオアルコキシジルコネート含有化合物、ジルコニウムの有機官能性アルコキシドで該アルコキシドが水に相溶性で水中で活性である有機官能性アルコキシド及びこれらの混合物からなる群から選択される、請求項1乃至請求項3のいずれか1項記載の窒化ホウ素組成物。
- 前記窒化ホウ素粉末が、a)バインダーで結合した後噴霧乾燥した不規則非球状粒子の球状凝集体、b)平均粒径10ミクロン以上の六方晶系窒化ホウ素プレートレットの不規則形状の凝集体、又はバインダーで結合した後噴霧乾燥した不規則非球状粒子の球状凝集体と平均粒径10ミクロン以上の六方晶系窒化ホウ素プレートレットの不規則形状の凝集体との混合物の形態である、請求項1乃至請求項4のいずれか1項記載の窒化ホウ素組成物。
- 前記窒化ホウ素粉末が、a)約50〜約300のアスペクト比及びb)約2〜約20μmの平均直径の少なくともいずれかを有する六方晶系窒化ホウ素プレートレットを含む、請求項1乃至請求項5のいずれか1項記載の窒化ホウ素組成物。
- 当該組成物をポリマー組成物にブレンドしたとき、ジルコネートカップリング剤で処理していない同量の窒化ホウ素粉末を含むポリマー組成物の粘度に比して、ポリマー組成物の粘度を20%以上低下させる、請求項1乃至請求項6のいずれか1項記載の窒化ホウ素組成物。
- 熱可塑性樹脂、エポキシ樹脂、シリコーン樹脂からなる群から選択されるポリマーマトリックスと、ジルコネートカップリング剤、アルミン酸ジルコニウムカップリング剤、アルミネートカップリング剤及びこれらの混合物の1種以上を0.5〜10重量%含むコーティング層で処理した窒化ホウ素の粒子を含む充填材物質とを含んでなる、ポリマー複合材組成物。
- 前記ポリマーマトリックスが、液晶ポリマー、ポリエチレンナフタレート、ポリエチレンテレフタレート、ポリブチレンテレフタレートのようなポリエステル、ポリアミド、ポリイミド、ポリフタルアミド、ポリフェニレンスルフィド、ポリカーボネート、ポリエーテルエーテルケトン、ポリアリールエーテルケトン、ポリフェニレンオキシド又はこれらの混合物の1種以上からなり、前記窒化ホウ素が、エチレン性不飽和ジルコネート含有化合物、ネオアルコキシジルコネート含有化合物、ジルコニウムの有機官能性アルコキシドで該アルコキシドが水に相溶性で水中で活性である有機官能性アルコキシド及びこれらの混合物からなる群から選択されるジルコネートカップリング剤を約1〜約5重量%含むコーティング層で処理されている、請求項8記載のポリマー複合材組成物。
- 請求項1乃至請求項8のいずれか1項記載の組成物を含んでなる物品。
- 粘度の低下したポリマー複合材を形成するための窒化ホウ素粉末の製造方法であって、ジルコネートカップリング剤、アルミン酸ジルコニウムカップリング剤、アルミネートカップリング剤及びこれらの混合物の1種以上の十分量で窒化ホウ素粉末を被覆するのに十分な時間ジルコネートカップリング剤を含む組成物で窒化ホウ素粉末を被覆する工程を含んでなり、被覆窒化ホウ素粉末をポリマー組成物にブレンドしたとき、ジルコネートカップリング剤で処理していない同量の窒化ホウ素粉末を含むポリマー組成物の粘度に比して、ポリマー組成物の粘度を20%以上低下させる、方法。
- 窒化ホウ素粉末を、エチレン性不飽和ジルコネート含有化合物、ネオアルコキシジルコネート含有化合物、ジルコニウムの有機官能性アルコキシドで該アルコキシドが水に相溶性で水中で活性である有機官能性アルコキシド及びこれらの混合物からなる群から選択されるジルコネートカップリング剤で被覆する、請求項11記載の方法。
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Also Published As
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CN1834167A (zh) | 2006-09-20 |
EP1702907A3 (en) | 2007-09-12 |
KR20060100914A (ko) | 2006-09-21 |
KR101216794B1 (ko) | 2012-12-31 |
CN1834167B (zh) | 2011-11-16 |
TW200634142A (en) | 2006-10-01 |
JP5036176B2 (ja) | 2012-09-26 |
US20070041918A1 (en) | 2007-02-22 |
US7445797B2 (en) | 2008-11-04 |
EP1702907A2 (en) | 2006-09-20 |
EP1702907B1 (en) | 2012-04-25 |
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