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BR9711257A - Processo para preparar uma poliamida pela rea-Æo de pelo menos uma aminonitrila com gua e poliamida - Google Patents

Processo para preparar uma poliamida pela rea-Æo de pelo menos uma aminonitrila com gua e poliamida

Info

Publication number
BR9711257A
BR9711257A BR9711257A BR9711257A BR9711257A BR 9711257 A BR9711257 A BR 9711257A BR 9711257 A BR9711257 A BR 9711257A BR 9711257 A BR9711257 A BR 9711257A BR 9711257 A BR9711257 A BR 9711257A
Authority
BR
Brazil
Prior art keywords
polyamide
aminonitrile
reacting
preparing
water
Prior art date
Application number
BR9711257A
Other languages
English (en)
Inventor
Robert Weiss
Dieter Keller
Gunter Pipper
Wolfgang Harder
Alfons Ludwig
Ralf Mohschladt
Original Assignee
Basf Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19635077A external-priority patent/DE19635077A1/de
Priority claimed from DE1997109390 external-priority patent/DE19709390A1/de
Application filed by Basf Ag filed Critical Basf Ag
Publication of BR9711257A publication Critical patent/BR9711257A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/04—Preparatory processes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C08G69/28—Preparatory processes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/36—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino acids, polyamines and polycarboxylic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Polyamides (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
BR9711257A 1996-08-30 1997-08-26 Processo para preparar uma poliamida pela rea-Æo de pelo menos uma aminonitrila com gua e poliamida BR9711257A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19635077A DE19635077A1 (de) 1996-08-30 1996-08-30 Verfahren zur kontinuierlichen Herstellung von Polyamiden aus omega-Aminoalkylnitrilen
DE1997109390 DE19709390A1 (de) 1997-03-07 1997-03-07 Verfahren zur Herstellung von Polyamiden aus Aminonitrilen
PCT/EP1997/004640 WO1998008889A2 (de) 1996-08-30 1997-08-26 Verfahren zur herstellung von polyamiden aus aminonitrilen

Publications (1)

Publication Number Publication Date
BR9711257A true BR9711257A (pt) 1999-08-17

Family

ID=26028873

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9711257A BR9711257A (pt) 1996-08-30 1997-08-26 Processo para preparar uma poliamida pela rea-Æo de pelo menos uma aminonitrila com gua e poliamida

Country Status (17)

Country Link
US (1) US6194538B1 (pt)
EP (1) EP0922065B1 (pt)
JP (1) JP3948754B2 (pt)
KR (1) KR100539338B1 (pt)
CN (1) CN1128833C (pt)
AR (1) AR009473A1 (pt)
BR (1) BR9711257A (pt)
CA (1) CA2264023C (pt)
CO (1) CO4870784A1 (pt)
CZ (1) CZ293844B6 (pt)
DE (1) DE59708777D1 (pt)
ES (1) ES2187826T3 (pt)
ID (1) ID18204A (pt)
MY (1) MY119018A (pt)
TR (1) TR199900422T2 (pt)
TW (1) TW399072B (pt)
WO (1) WO1998008889A2 (pt)

Families Citing this family (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804033A1 (de) * 1998-02-02 1999-08-05 Basf Ag Kontinuierliches Verfahren zur Herstellung von Polyamiden aus Aminonitrilen
DE19804020A1 (de) * 1998-02-02 1999-08-05 Basf Ag Verfahren zur Herstellung von Polyamiden aus Aminonitrilen
DE19804023A1 (de) 1998-02-02 1999-08-05 Basf Ag Kontinuierliches Verfahren zur Herstellung von Polyamiden aus Aminonitrilen
DE19808407A1 (de) * 1998-02-27 1999-09-09 Basf Ag Herstellung von Polyamiden durch Reaktivdestillation
DE19808490A1 (de) 1998-02-27 1999-09-02 Basf Ag Verfahren zur Herstellung von Polyamiden aus Aminocarbonsäureverbindungen
DE19808489A1 (de) * 1998-02-27 1999-09-02 Basf Ag Verfahren zur Herstellung von Polymermischungen aus Aminonitrilen und thermoplastischen Polymeren
US6069228A (en) * 1998-08-17 2000-05-30 E. I. Du Pont De Nemours And Company Process for preparing polyamides
DE19846014A1 (de) * 1998-10-06 2000-04-13 Basf Ag Beschleuniger für die Herstellung von Polyamiden aus Aminonitrilen
AU1320400A (en) * 1998-10-26 2000-05-15 E.I. Du Pont De Nemours And Company Continuous polymerization process for preparing polyamides from omega-aminonitriles
US6075117A (en) * 1998-12-21 2000-06-13 E.I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst
US6084056A (en) * 1998-12-22 2000-07-04 E. I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 utilizing low catalyst levels
US6103863A (en) * 1998-12-22 2000-08-15 E. I. Dupont De Nemours & Company Process for preparation of polyamide from dinitrile and diamine
DE19859929A1 (de) * 1998-12-23 2000-06-29 Bayer Ag Verfahren zur Herstellung von verzweigten Polyamiden
HUP0105495A2 (en) 1999-02-11 2002-05-29 Basf Ag Method for producing polyamide 6 of a low extract content, high viscosity stability and low remonomerization rate
DE19935398A1 (de) * 1999-07-30 2001-02-01 Basf Ag Verfahren zur Herstellung von Polyamiden aus Dinitrilen und Diaminen
DE19962573A1 (de) * 1999-12-23 2001-07-05 Basf Ag Verfahren zur Herstellung von Polyamiden
US6472501B1 (en) * 2001-06-01 2002-10-29 E. I. Du Pont De Nemours And Company Process for making nylon 6,6
US6437089B1 (en) 2001-06-01 2002-08-20 E. I. Du Pont De Nemours And Company Process for the production of nylon 6
DE10217439A1 (de) * 2002-04-18 2003-10-30 Basf Ag Verfahren zur Herstellung von Polyamiden
DE102004006955A1 (de) * 2004-02-12 2005-09-01 Basf Ag Kontinuierliches Verfahren zur Herstellung von Polyamiden
DE102004027022A1 (de) * 2004-06-02 2006-01-05 Basf Ag Verfahren zur Abtrennung von Ammoniak und Wasser aus Lactam-haltigen Gemischen
CN101558119A (zh) 2006-12-13 2009-10-14 巴斯夫欧洲公司 含丙烯酸酯橡胶的聚酰胺
DE102008038411A1 (de) 2007-09-11 2009-03-12 Basf Se Flammgeschützte Polyamide
US8309221B2 (en) * 2007-10-01 2012-11-13 Jay Plaehn Reinforced foam panel
MY150256A (en) 2007-12-18 2013-12-31 Basf Se Thermoplastic polyamides having polyether amines
DE102009011668A1 (de) 2008-03-05 2009-09-10 Basf Se Polyamid und hyperverzweigte Polyesster enthaltende Formmasse
WO2009156342A1 (de) 2008-06-27 2009-12-30 Basf Se Wärmeleitfähige polyamide mit diatomeenerde
JP2011526315A (ja) * 2008-07-02 2011-10-06 ビーエーエスエフ ソシエタス・ヨーロピア 発泡性ポリアミド
DE102008058246A1 (de) 2008-11-19 2010-05-20 Basf Se Hochmolekulare Polyamide
WO2010076145A1 (de) 2008-12-16 2010-07-08 Basf Se Wärmealterungsbeständige polyamide
EP2264093A1 (de) 2009-06-16 2010-12-22 THOR GmbH Flammgeschützte Polyamidformmassen
WO2011000772A1 (de) 2009-06-30 2011-01-06 Basf Se Polyamidfasern mit anfärbbaren partikeln und verfahren zu deren herstellung
WO2011000816A1 (de) 2009-07-03 2011-01-06 Basf Se Nanokompositblends enthaltend polyamide und polyolefine
EP2456816A1 (de) 2009-07-21 2012-05-30 Basf Se Nanokompositblends auf basis von polyamiden und polyarylenethersulfonen
WO2011009877A1 (de) 2009-07-24 2011-01-27 Basf Se Flammgeschützte polyamidformmassen
US8450407B2 (en) 2009-10-27 2013-05-28 Basf Se Heat aging-resistant polyamides with flame retardancy
CN102597080A (zh) 2009-10-27 2012-07-18 巴斯夫欧洲公司 耐热老化的聚酰胺
WO2011069942A1 (de) 2009-12-08 2011-06-16 Basf Se Teilaromatische copolyamidformmassen auf der basis von octamethylendiamin
ES2443316T3 (es) 2009-12-09 2014-02-18 Basf Se Copoliamidas semicristalinas, semiaromáticas
DE102010062886A1 (de) 2009-12-16 2011-06-22 Basf Se, 67063 Polyarylenethersulfone als Schlagzähmodifier
JP6172943B2 (ja) 2010-03-09 2017-08-02 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ 耐熱老化性ポリアミド
US8466221B2 (en) 2010-03-09 2013-06-18 Basf Se Polyamides that resist heat-aging
WO2011134930A1 (de) 2010-04-30 2011-11-03 Basf Se Langfaserverstärkte polyamide mit polyolefinen
DE102010023770A1 (de) 2010-06-15 2011-12-15 Basf Se Glühdrahtbeständige Formmassen
US8563680B2 (en) 2010-06-15 2013-10-22 Basf Se Heat-aging-resistant polyamides
CN102985491B (zh) 2010-06-15 2015-01-28 巴斯夫欧洲公司 耐热老化性聚酰胺
WO2012013564A1 (de) 2010-07-30 2012-02-02 Basf Se Flammgeschützte formmassen
EP2415827A1 (de) 2010-08-04 2012-02-08 Basf Se Flammgeschützte Polyamide mit Schichtsilikaten
WO2012062594A1 (de) 2010-11-11 2012-05-18 Basf Se Wärmealterungsbeständige polyamide
ES2555128T3 (es) 2010-11-18 2015-12-29 Styrolution Europe Gmbh Masas de moldeo termoplásticas a base de copolímeros de estireno y poliamidas; procedimiento para su producción y su utilización
US8575295B2 (en) 2010-12-16 2013-11-05 Basf Se Glow-wire resistant polyamides
KR20140040087A (ko) 2010-12-16 2014-04-02 바스프 에스이 글로우 와이어 내성 폴리아미드
WO2012084785A1 (de) 2010-12-20 2012-06-28 Basf Se Thermoplastische formmassen auf basis von styrol-copolymeren und polyamiden mit verbesserter tieftemperaturzähigkeit
ES2526528T3 (es) 2011-01-18 2015-01-13 Basf Se Poliamidas estables a la hidrólisis
US8629220B2 (en) 2011-01-18 2014-01-14 Basf Se Hydrolysis-resistant polyamides
US8629206B2 (en) 2011-01-20 2014-01-14 Basf Se Flame-retardant thermoplastic molding composition
CN103492778A (zh) 2011-04-21 2014-01-01 巴斯夫欧洲公司 用于将传热介质管固定至容器的装置
EP2702102A1 (de) 2011-04-28 2014-03-05 Basf Se Flammgeschütze formmassen
US8653168B2 (en) 2011-05-10 2014-02-18 Basf Se Flame-retardant thermoplastic molding composition
EP2527402A1 (de) 2011-05-27 2012-11-28 Basf Se Thermoplastische Formmasse
US8987357B2 (en) 2011-05-27 2015-03-24 Basf Se Thermoplastic molding composition
DE102011104303A1 (de) 2011-06-03 2012-12-06 Basf Se Photovoltaik-System zur Installation auf Dächern mit Kunststoffträger und Photovoltaik-Modul
EP2756033B1 (de) 2011-09-15 2015-06-24 Basf Se Silber-zinkoxid-mischungen als stabilisator für flammgeschützte polyamide enthaltend roten phosphor
US8883904B2 (en) 2011-09-15 2014-11-11 Basf Se Mixtures of silver and zinc oxide as stabilizer for flame-retardant polyamides
EP2573138A1 (de) 2011-09-21 2013-03-27 Basf Se Polyamid-Formmassen
US20140323631A1 (en) 2011-11-25 2014-10-30 Basf Se Blow-moldable polyamide compositions
WO2013083508A1 (de) 2011-12-07 2013-06-13 Basf Se Flammgeschützte polyamide mit flüssigkristallinen polyestern
MX2014009924A (es) 2012-02-20 2015-08-10 Basf Se Mezclas de cuo/zno para servir como estabilizadores para poliamidas ignífugas.
EP2641939A1 (de) 2012-03-21 2013-09-25 Basf Se Hellgefärbte flammgeschützte Polyamide
EP2650331A1 (de) 2012-04-11 2013-10-16 Basf Se Polyamide für Trinkwasseranwendungen
BR112014028170A2 (pt) 2012-06-18 2017-06-27 Basf Se composição termoplástica de moldagem, uso das composições termoplásticas de moldagem e fibras, lâminas e moldes.
EP2898009B1 (de) 2012-09-19 2016-10-12 Basf Se Flammgeschützte polyamide mit heller farbe
US9828503B2 (en) 2013-04-15 2017-11-28 Basf Se Glow wire resistant polyamides
DE102014215370A1 (de) 2013-09-05 2015-03-05 Basf Se Langfaserverstärkte flammgeschützte Polyamide
WO2016087324A1 (de) 2014-12-01 2016-06-09 Basf Se Flammgeschützte polyamide mit sulfonsäuresalzen
GB201421293D0 (en) 2014-12-01 2015-01-14 Xeros Ltd New cleaning method, apparatus and use
BR112017011157B1 (pt) 2014-12-01 2022-10-11 Basf Se Partículas de poliamida termoplástica, método para produzir partículas de poliamida termoplástica e uso de partículas de poliamida termoplástica
US11674015B2 (en) 2015-04-16 2023-06-13 Basf Se Polyamides with improved optical properties
BR112017027344A2 (pt) 2015-06-19 2018-09-04 Basf Se ?composição de poliamida, artigo de moldagem e utilização dos polióis de poliéter?
EP3118247A1 (de) 2015-07-15 2017-01-18 Basf Se Polyamide mit besseren optischen eigenschaften
EP3130633A1 (de) 2015-08-13 2017-02-15 Basf Se Polyamide mit guter mechanik und schwindung
EP3135730A1 (de) 2015-08-27 2017-03-01 Basf Se Polyamide mit niedrigem kristallisationspunkt und geringer schwindung
CN109415507B (zh) 2016-04-26 2022-03-08 巴斯夫欧洲公司 热塑性聚酰胺颗粒
EP3472225B1 (en) 2016-06-15 2020-09-30 Basf Se Polyamide dispersion in polyol and preparation thereof
WO2017216023A1 (de) 2016-06-15 2017-12-21 Basf Se Schlagzähmodifier basierend auf polyisobuten für polyamide
US11787920B2 (en) 2016-10-13 2023-10-17 Basf Se Flame-retardant polyamides
JP7114608B2 (ja) 2017-02-01 2022-08-08 ビーエーエスエフ ソシエタス・ヨーロピア ナフタル酸無水物末端基を含むポリアリーレンエーテルスルホン
JP7183172B2 (ja) 2017-03-01 2022-12-05 ビーエーエスエフ ソシエタス・ヨーロピア Ｐｖｐを有する難燃剤ポリアミド
EP3642265B1 (de) 2017-06-22 2025-08-27 Basf Se Polyamide mit phosphor und al-phosphonaten
WO2019197511A1 (en) 2018-04-13 2019-10-17 Basf Se Flame-retardant thermoplastic molding composition
JP7480118B2 (ja) 2018-08-16 2024-05-09 ビーエーエスエフ ソシエタス・ヨーロピア 熱可塑性成形材料
WO2020169547A1 (de) 2019-02-20 2020-08-27 Basf Se Thermoplastische formmasse
EP3931247A1 (de) 2019-02-25 2022-01-05 Basf Se Thermoplastische formmasse
CN114341266A (zh) 2019-09-05 2022-04-12 巴斯夫欧洲公司 耐热的热塑性模塑组合物
EP3808810B1 (de) 2019-10-16 2023-03-29 INEOS Styrolution Group GmbH Thermoplastische formmassen für rotomolding-verfahren
WO2021151850A1 (en) 2020-01-27 2021-08-05 Basf Se Thermoplastic polyamide molding compositions that resist heat
BR112022016870A2 (pt) 2020-02-26 2022-10-25 Basf Se Composição de moldagem termoplástica, processo para preparar a composição de moldagem termoplástica, uso da composição de moldagem termoplástica, fibra, folha ou moldagem, mistura e uso da mistura
CN115279834A (zh) 2020-03-20 2022-11-01 巴斯夫欧洲公司 增塑的聚酰胺模塑组合物
CN115335456B (zh) 2020-03-25 2024-10-29 巴斯夫欧洲公司 耐热老化聚酰胺模塑组合物
WO2022180221A1 (en) 2021-02-25 2022-09-01 Basf Se Polymers having improved thermal conductivity
EP4337453A1 (de) 2021-05-11 2024-03-20 Basf Se LASERBESCHRIFTETE UND LASERVERSCHWEIßTE FORMKÖRPER UND DEREN HERSTELLUNG
CN117413020A (zh) 2021-06-04 2024-01-16 巴斯夫欧洲公司 保持高光泽的热塑性模塑组合物
KR20250024047A (ko) 2022-06-08 2025-02-18 바스프 에스이 폴리아미드 화합물을 생산하기 위한 재활용 방법
CN119948108A (zh) 2022-09-27 2025-05-06 巴斯夫欧洲公司 具有改善的颜色稳定性的热塑性模塑组合物-1
KR20250108720A (ko) 2022-11-17 2025-07-15 바스프 에스이 난연성 폴리아미드용 안정화제로서의 혼합 금속 산화물 조성물
WO2025049564A1 (en) 2023-08-29 2025-03-06 Basf Se Polyamide molding compositions with improved heat-aging resistance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245129A (en) * 1935-01-02 1941-06-10 Du Pont Process for preparing linear polyamides
CA1186444A (en) 1981-05-18 1985-04-30 Hansdieter Hofmann Method for producing spinnable polyamides, etc.
US4568736A (en) * 1984-09-17 1986-02-04 The Standard Oil Company Preparation of polyamide from omega-aminonitrile with oxygen containing phosphorus catalyst
DE3534817A1 (de) * 1985-09-30 1987-04-02 Davy Mckee Ag Verfahren zur herstellung von polyamid
US5310827A (en) * 1987-01-22 1994-05-10 Kuraray Co., Ltd. Polyamide copolymers
US5109104A (en) 1990-10-04 1992-04-28 E. I. Du Pont De Nemours And Company Preparation of polyamides from omega-aminonitriles
US5185427A (en) * 1991-08-20 1993-02-09 E. I. Du Pont De Nemours And Company Process for the production of copolyamides from amino nitrile, diamine and dicarboxylic acid
DE4430480A1 (de) * 1994-08-27 1996-02-29 Basf Ag Hochmolekulare Polyamide aus Nitrilen
FR2735471B1 (fr) * 1995-06-16 1997-08-22 Rhone Poulenc Chimie Procede de preparation de lactames

Also Published As

Publication number Publication date
EP0922065B1 (de) 2002-11-20
CA2264023C (en) 2007-03-27
CN1235621A (zh) 1999-11-17
EP0922065A2 (de) 1999-06-16
CA2264023A1 (en) 1998-03-05
WO1998008889A3 (de) 1998-06-25
CN1128833C (zh) 2003-11-26
CZ67599A3 (cs) 1999-06-16
WO1998008889A2 (de) 1998-03-05
TW399072B (en) 2000-07-21
MY119018A (en) 2005-03-31
DE59708777D1 (de) 2003-01-02
ID18204A (id) 1998-03-12
KR100539338B1 (ko) 2005-12-28
CO4870784A1 (es) 1999-12-27
JP2000516977A (ja) 2000-12-19
JP3948754B2 (ja) 2007-07-25
AR009473A1 (es) 2000-04-26
ES2187826T3 (es) 2003-06-16
KR20000035962A (ko) 2000-06-26
CZ293844B6 (cs) 2004-08-18
TR199900422T2 (xx) 1999-04-21
US6194538B1 (en) 2001-02-27

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