JP5173822B2 - 表面保護および触媒塗膜を備えた多孔質セラミックフィルタのためのマイクロ波処理方法 - Google Patents
表面保護および触媒塗膜を備えた多孔質セラミックフィルタのためのマイクロ波処理方法 Download PDFInfo
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- JP5173822B2 JP5173822B2 JP2008537725A JP2008537725A JP5173822B2 JP 5173822 B2 JP5173822 B2 JP 5173822B2 JP 2008537725 A JP2008537725 A JP 2008537725A JP 2008537725 A JP2008537725 A JP 2008537725A JP 5173822 B2 JP5173822 B2 JP 5173822B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249955—Void-containing component partially impregnated with adjacent component
- Y10T428/249956—Void-containing component is inorganic
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Description
今回の実験のために、表面保護塗膜乾燥ステップおよび触媒ウォッシュコート塗膜乾燥ステップのためにマイクロ波オーブン(電子レンジ)を用いた。多孔質チタン酸アルミニウムセラミックのCTE測定には、3.8cm×1.3cm(1.5インチ×0.5インチ)のサンプルを実験に用いた。上記チタン酸アルミニウムセラミック材料の気孔率は、「チタン酸アルミニウムを主成分とするセラミック物品」と題して2003年7月24日付けで出願された米国特許出願公開第2004/0092381 A1号明細書に記載された実施例サンプルが有する47.59%であった。このサンプルの1000℃におけるCTEは8.7×10−7/℃であった。このCTE値は、表1に記載されているように、8.7として報告されており、今後はすべてのCTE値について同様の表記法が用いられる。いずれの表面保護剤をも用いない場合には、ウォッシュコート層を施した後は、CTEが比較的高かった(44)。
ウォッシュコーティング/触媒添加が施されてもその低いCTEを保持するマイクロクラックを備えた多孔質セラミックフィルタの処理に関してやはり効果的な溶液である、ポリカーボジイミド架橋剤を混合したポリビニルアルコール/ビニルアミン(PVOH/VAM)コポリマーの水溶液から形成された表面保護塗膜の場合に関して、マイクロ波乾燥をさらに評価する。この表面保護膜システムは、一般に架橋反応を完了するのに、100℃で31時間を超え、125℃で約6時間半を超え、150℃で約1時間半を超える時間を要することを示す。
Claims (10)
- 多孔質セラミック製触媒支持体に触媒塗膜または触媒支持塗膜を施すのに先立って、前記支持体に下塗りを施す方法であって、
水と、ポリビニルアルコール、ポリアクリル酸、ポリアクリルアミン、ポリビニルアルコール/ビニルアミン・コポリマー、ポリビニルアルコール/ビニルホルムアミド・コポリマー、ゼラチン、イオネンポリマー、酸で活性化されたアミノアクリル酸コポリマー、および脂肪族アクリル酸ワックス・コポリマーからなる群から選ばれた少なくとも一種類の塗膜材料とを含む混合液からなる塗膜を前記支持体に施して、塗装された支持体を形成するステップと、
前記支持体を第1のマイクロ波の場に曝して前記塗膜を乾燥させ、重合した膜を形成するステップと、
を含むことを特徴とする前記方法。 - 前記少なくとも一種類の塗膜材料の乾燥質量が1.5%から3.0%までの範囲内になるまで、前記支持体を前記第1のマイクロ波の場に曝すことを特徴とする請求項1記載の方法。
- 前記第1のマイクロ波の場を60分以内の期間印加することを特徴とする請求項1記載の方法。
- 前記支持体に前記混合液を施すステップが真空浸透を含むことを特徴とする請求項1記載の方法。
- 前記多孔質セラミック製触媒支持体としてセラミックハニカムを提供するステップをさらに含み、
該セラミックハニカムが、コージェライト、チタン酸アルミニウム、アルカリ燐酸ジルコニウム、アルミン酸カルシウムおよびアルカリ・アルミノ珪酸塩、およびニオブ酸塩からなる群から選ばれた少なくとも一種類の材料を含むことを特徴とする請求項1記載の方法。 - 前記支持体を前記第1のマイクロ波の場に曝した後に、水と、Al2O3,TiO2,SiO2,ZrO2,CeO2,La2O3 ,ゼオライト、アルカリ金属、およびアルカリ土金属からなる群から選ばれた少なくとも一種類のウォッシュコート材料と、周期律表の遷移金属系からの少なくとも一種類の触媒金属とを含む触媒混合液を前記支持体に塗布するステップと、
該支持体を第2のマイクロ波の場に曝して、前記触媒混合液から水分を除去するステップと、
をさらに含むことを特徴とする請求項1記載の方法。 - 前記触媒混合液の水分含有量が1%以下となるまで、前記支持体を前記第2のマイクロ波の場に曝すことを特徴とする請求項6記載の方法。
- 前記触媒混合液の水分含有量が0.01%以下となるまで、前記支持体を前記第2のマイクロ波の場に曝すことを特徴とする請求項7記載の方法。
- 前記第2のマイクロ波の出力が、前記支持体の45.36キログラム(100ポンド)当たり3キロワットから10キロワットまでの範囲内にあることを特徴とする請求項6記載の方法。
- 前記第2のマイクロ波の場を60分以内の期間印加することを特徴とする請求項6記載の方法。
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US11/261,226 | 2005-10-27 | ||
US11/261,226 US7700163B2 (en) | 2005-10-27 | 2005-10-27 | Microwave process for porous ceramic filters with passivation and catalyst coatings |
PCT/US2006/038724 WO2007050246A2 (en) | 2005-10-27 | 2006-10-03 | Microwave process for porous ceramic filters with passivation and catalyst coatings |
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JP2009513338A JP2009513338A (ja) | 2009-04-02 |
JP2009513338A5 JP2009513338A5 (ja) | 2012-08-02 |
JP5173822B2 true JP5173822B2 (ja) | 2013-04-03 |
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US (1) | US7700163B2 (ja) |
EP (1) | EP1951440B1 (ja) |
JP (1) | JP5173822B2 (ja) |
CN (1) | CN101300086A (ja) |
WO (1) | WO2007050246A2 (ja) |
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WO2007050246A3 (en) | 2007-06-21 |
CN101300086A (zh) | 2008-11-05 |
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US20070098914A1 (en) | 2007-05-03 |
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