JP6087830B2 - メチルセルロースを含む押し出し成形体のための組成物 - Google Patents
メチルセルロースを含む押し出し成形体のための組成物 Download PDFInfo
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- JP6087830B2 JP6087830B2 JP2013537703A JP2013537703A JP6087830B2 JP 6087830 B2 JP6087830 B2 JP 6087830B2 JP 2013537703 A JP2013537703 A JP 2013537703A JP 2013537703 A JP2013537703 A JP 2013537703A JP 6087830 B2 JP6087830 B2 JP 6087830B2
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- Prior art keywords
- methylcellulose
- composition
- hollow body
- methyl
- extruded
- Prior art date
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- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- C04B33/04—Clay; Kaolin
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Description
a) ベーキング又は焼結の結果として硬化する無機材料と、
b) DS(メチル)が1.10〜1.61のメチルセルロースと
を含む組成物から製造された、押し出し成形中空体である。
無機材料a)及びメチルセルロースb)の総重量を基準として、
a) ベーキング又は焼結の結果として硬化する、85〜99.5パーセントの無機材料と、
b) DS(メチル)が1.10〜1.61の、0.5〜15パーセントのメチルセルロースと
を含む組成物である。
a) ベーキング又は焼結の結果として硬化する無機材料と、
b) DS(メチル)が1.10〜1.61のメチルセルロースと
c) 液体希釈剤と
d) 任意の添加剤と
を含む押し出し可能な組成物を用意し、そして
該押し出し可能な組成物に押し出し成形を施すことによって、押し出し成形中空体を製造する
工程を含む、押し出し成形中空体の製造方法である。
アルカリセルロースと塩化メチルとを反応させることによって、一般に知られているWiliamsonエーテル合成原理に従って、例1〜4及び比較例A及びBを製造した。反応は化学量論量の水酸化ナトリウムを必要とする(H. Thielking, Marc Schmidt, Cellulose Ethers, Ullmanns Encyclopedia of Industrial Chemistry, DOI: 10.1002/14356007.a05_461.pub2)。
耐圧反応器内に32.4kgの粉砕木材パルプを添加した。三重の不活性化(真空化及び窒素真空破壊)後、51.2kgの苛性ソーダ(50重量%)を攪拌しながら40℃で添加した。パルプを30分にわたってアルカリ化した。11.1kgのジメチルエーテル及び41.4kgの塩化メチルを添加した後、反応混合物を攪拌しながら80℃まで加熱した。混合物を80℃で100分間にわたって攪拌し、次いで揮発性成分を蒸留して除去し、反応器を窒素で満たして冷却し、そして温水で洗浄することによって粗生成物を精製した。乾燥させて粉砕した後、生成物は押し出し試験のために使用可能になった。
例1〜4及び比較例A及びBのメチルセルロースのDS(メチル)の割り出しを、ツァイゼル法に従って行った(G. Bartelmus 及びR. Ketterer, Z. Anal. Chem., 286(1977) 161-190)。
コーディエライトCP 820M (ドイツ国在Imerys Tableware)と、下記表1に挙げられた(100重量部のコーディエライト配合物を基準として)2重量部のセルロースエーテルとから成る100重量部のコーディエライト配合物を、均質な混合物が形成されるまで、流動床ミキサ(ドイツ国在Loedige製)内で先ず混合した。続いて20℃の(100重量部のコーディエライトを基準として)30.5部の水を添加した。そして2つのマスチケータ・ブレードを有するニーダ(ドイツ国Aachen在AMK製)内で素材を数分間にわたってさらに混合し混練した。公称ブレード速度は50/sであった。次いですぐに素材を水冷式単軸押し出し機(ドイツ国Muehlacker在HaendleのHaendle PZVE 8Dスクリュ直径8cm)のフィード・トラフ内に導入した。押し出し開始前に、多孔板を通して押し出し、脱気及び濾過のために真空室を通過させる(すなわち網目サイズ0.3mmのスクリーンに押し通すことによって素材から凝集体を取り除く)ことによって、素材を30分間にわたって再循環させた。このとき押し出し圧力は一定レベルに達しており、更なる低下を示さなかった。押し出しスクリュ速度は15rpmであった。
上述のように30分間にわたって素材を濾過した後、圧力が一定の値に達するまで材料を再循環させながら、ペーストを数分間にわたって室温で押し出した。この際に、セル密度が47セル/cm2(1平方インチ当たり300セル)のハニカム・プロフィールを通してペーストをスクリュ速度15rpmで押し出し、コンベヤ・ベルト上に放出した。種々異なる温度で試験を実施することによって、より高い押し出し温度に向かって配合物の押し出し能力を評価した。これらの試験は、押し出し圧力が30℃における押し出し圧力と比較して10barより大きく増大したときの温度で中止するか、或いは押し出されたプロフィール中により大きい欠陥が発生したときに中止した。
理想的な事例では、ハニカム構造を有する押し出し中空物品は安定な直線的幾何学形状を呈するが、しかし実際には、ハニカムはしばしば歪み、そのプロフィールはサギングを示す。「弱いグリーン強度」と呼ばれることもあるハニカムのサギングは、乾燥前に押し出されたばかりの湿潤グリーンボディの湿潤グリーン曲げ弾性モジュラス(曲げ弾性率)を測定することによって定量化することができる。セル密度が47セル/cm2(1平方インチ当たり300セル)のハニカム・プロフィールの代わりに、サイズ4cm x 4cmの完全ダイを使用することを除いて、種々異なる温度で押し出し能力を試験するために同じ手順を用いた。湿潤グリーン特性を割り出すために試料を製造する押し出し温度は25〜30℃、並びに湿潤グリーン特性の割り出し中の押し出し物の温度であった。
試験詳細:試料サイズ:ダイ40mm x 40mm、断面積約17cm2。圧縮ダイ(旋回可能)、支承ロール(前方へ回転、旋回可能)、貫通速度:10mm/分、長さ/高さ=2.5、試験プレロード5g(0.04903N、予測破断力の約0.2%)、力センサ500N、両支承ロール間の差:100mm。
F:力
l:2支持体間の長さ
Δl:偏差
b:試料の幅
h:試料の高さ)
に従って行われる。
以下もまた開示される。
[1] a) ベーキング又は焼結の結果として硬化する無機材料と、
b) DS(メチル)が1.10〜1.61のメチルセルロースと
を含む組成物から製造された、押し出し成形中空体。
[2] 該無機材料a)及び該メチルセルロースb)の総重量を基準として、0.5〜15重量パーセントの成分(b)を含む組成物から製造される、上記[1]に記載の押し出し成形中空体。
[3] 成分b)は、DS(メチル)が1.20〜1.60のメチルセルロースである、上記[1]又は[2]に記載の押し出し成形中空体。
[4] 成分b)は、DS(メチル)が1.30〜1.55のメチルセルロースである、上記[3]に記載の押し出し成形中空体。
[5] 該無機材料はセラミック形成材料である、上記[1]から[4]までのいずれかに記載の押し出し成形中空体。
[6] 該無機材料はアルミナ又はその前駆体、シリカ又はその前駆体、アルミネート、アルミノシリケート、アルミナシリカ、長石、チタニア、溶融石英、窒化アルミニウム、炭化アルミニウム、カオリン、コーディエライト、ムライト、粘土、ベントナイト、タルク、ジルコン、ジルコニア、スピネル、炭化ケイ素、ホウ化ケイ素、窒化ケイ素、二酸化チタン、炭化チタン、炭化ホウ素、酸化ホウ素、ボロシリケート、ナトリウムバリウムボロシリケート、シリケート、層状シリケート、シリコン金属、炭素、粉ガラス、希土類酸化物、ソーダ石灰、ゼオライト、バリウムチタネート、鉛チタネートジルコネート、アルミニウムチタネート、バリウムフェライト、ストロンチウムフェライト、炭素、粉ガラス、希土類酸化物、又はこのような無機材料のうちの2種以上の組み合わせである、上記[1]から[5]までのいずれかに記載の押し出し成形中空体。
[7] ハニカム構造を有する、上記[1]から[6]までのいずれかに記載の押し出し成形中空体。
[8] 押し出し成形中空体を製造するための組成物であって、
無機材料a)及びメチルセルロースb)の総重量を基準として、
a) ベーキング又は焼結の結果として硬化する、85〜99.5パーセントの無機材料と、
b) DS(メチル)が1.10〜1.61の、0.5〜15パーセントのメチルセルロースと
を含む組成物。
[9] 上記[3]若しくは[4]に記載のメチルセルロース、又は上記[5]若しくは[6]に記載の無機材料を含む、上記[8]に記載の組成物。
[10] 押し出し成形中空体の製造方法であって、
a) ベーキング又は焼結の結果として硬化する無機材料と、
b) DS(メチル)が1.10〜1.61のメチルセルロースと
c) 液体希釈剤と
d) 任意の添加剤と
を含む押し出し可能な組成物を用意し、そして
該押し出し可能な組成物に押し出し成形を施すことによって、押し出し成形中空体を製造する
工程を含む、押し出し成形中空体の製造方法。
[11] さらに、該押し出し成形中空体を乾燥させ、そしてベーキング又は焼結する工程を含む、上記[10]に記載の方法。
[12] 該押し出し可能な組成物は、上記[3]若しくは[4]に記載のメチルセルロース、又は上記[5]若しくは[6]に記載の無機材料を含む、上記[11]に記載の方法。
[13] a) ベーキング又は焼結の結果として硬化する無機材料と、
b) DS(メチル)が1.10〜1.61のメチルセルロースと
を含む組成物から製造された、乾燥済・焼結済の押し出し成形体の、
触媒担体として、触媒として、熱交換器として、又はフィルタとしての使用。
[14] 排ガス処理のための触媒の担体、又は触媒フィルタとしての、上記[13]に記載の使用。
Claims (8)
- 押し出し成形中空体を製造するための組成物であって、
無機材料a)及びメチルセルロースb)の総重量を基準として、
a) ベーキング又は焼結の結果として硬化する、85〜99.5パーセントの無機材料と、
b) メチル基のみ有し他のエーテル基を有さない、DS(メチル)が1.10〜1.61の、0.5〜15パーセントのメチルセルロースと
を含む組成物。 - 成分b)は、DS(メチル)が1.20〜1.60のメチルセルロースである、請求項1に記載の組成物。
- 該無機材料はアルミナ又はその前駆体、シリカ又はその前駆体、アルミネート、アルミノシリケート、アルミナシリカ、長石、チタニア、溶融石英、窒化アルミニウム、炭化アルミニウム、カオリン、コーディエライト、ムライト、粘土、ベントナイト、タルク、ジルコン、ジルコニア、スピネル、炭化ケイ素、ホウ化ケイ素、窒化ケイ素、二酸化チタン、炭化チタン、炭化ホウ素、酸化ホウ素、ボロシリケート、ナトリウムバリウムボロシリケート、シリケート、層状シリケート、シリコン金属、炭素、粉ガラス、希土類酸化物、ソーダ石灰、ゼオライト、バリウムチタネート、鉛チタネートジルコネート、アルミニウムチタネート、バリウムフェライト、ストロンチウムフェライト、又はこのような無機材料のうちの2種以上の組み合わせである、請求項1又は2に記載の組成物。
- 押し出し成形中空体の製造方法であって、
a) ベーキング又は焼結の結果として硬化する無機材料と、
b) メチル基のみ有し他のエーテル基を有さない、DS(メチル)が1.10〜1.61のメチルセルロースと
c) 液体希釈剤と
d) 任意の添加剤と
を含む押し出し可能な組成物を用意し、そして
該押し出し可能な組成物に押し出し成形を施すことによって、押し出し成形中空体を製造する
工程を含む、押し出し成形中空体の製造方法。 - さらに、該押し出し成形中空体を乾燥させ、そしてベーキング又は焼結する工程を含む、請求項4に記載の方法。
- 該押し出し可能な組成物は、メチル基のみ有し他のエーテル基を有さない、DS(メチル)が1.20〜1.60のメチルセルロース、又はアルミナ又はその前駆体、シリカ又はその前駆体、アルミネート、アルミノシリケート、アルミナシリカ、長石、チタニア、溶融石英、窒化アルミニウム、炭化アルミニウム、カオリン、コーディエライト、ムライト、粘土、ベントナイト、タルク、ジルコン、ジルコニア、スピネル、炭化ケイ素、ホウ化ケイ素、窒化ケイ素、二酸化チタン、炭化チタン、炭化ホウ素、酸化ホウ素、ボロシリケート、ナトリウムバリウムボロシリケート、シリケート、層状シリケート、シリコン金属、炭素、粉ガラス、希土類酸化物、ソーダ石灰、ゼオライト、バリウムチタネート、鉛チタネートジルコネート、アルミニウムチタネート、バリウムフェライト、ストロンチウムフェライト、又はこのような無機材料のうちの2種以上の組み合わせである無機材料を含む、請求項5に記載の方法。
- 請求項1〜3のいずれか1項に記載の組成物から製造された、乾燥済・焼結済の押し出し成形体の、
触媒担体として、触媒として、熱交換器として、又はフィルタとしての使用。 - 排ガス処理のための触媒の担体、又は触媒フィルタとしての、請求項7に記載の使用。
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US9957200B2 (en) * | 2013-11-27 | 2018-05-01 | Corning Incorporated | Composition for improved manufacture of substrates |
US20160289123A1 (en) * | 2015-03-30 | 2016-10-06 | Corning Incorporated | Ceramic batch mixtures having decreased wall drag |
CN109166960A (zh) * | 2018-08-23 | 2019-01-08 | 浙江理工大学 | 一种纤维基柔性压电传感器的制备方法 |
CN110317065A (zh) * | 2019-06-04 | 2019-10-11 | 银川艾森达新材料发展有限公司 | 一种等截面氮化铝产品的成型方法 |
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