NO952620L - Polymerbundne ligander, polymerbundne metallocener, katalysatorsystemer og fremgangsmåte til fremstilling av en polymerbundet ligand - Google Patents
Polymerbundne ligander, polymerbundne metallocener, katalysatorsystemer og fremgangsmåte til fremstilling av en polymerbundet ligandInfo
- Publication number
- NO952620L NO952620L NO952620A NO952620A NO952620L NO 952620 L NO952620 L NO 952620L NO 952620 A NO952620 A NO 952620A NO 952620 A NO952620 A NO 952620A NO 952620 L NO952620 L NO 952620L
- Authority
- NO
- Norway
- Prior art keywords
- polymer
- bound
- preparing
- metallocenes
- polystyrene
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
- C08F4/6192—Component covered by group C08F4/60 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
- C08F4/61912—Component covered by group C08F4/60 containing a transition metal-carbon bond in combination with an organoaluminium compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
- C08F4/61916—Component covered by group C08F4/60 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
- C08F4/6192—Component covered by group C08F4/60 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F4/61922—Component covered by group C08F4/60 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Det tilveiebringes en polymerbundet ligand representert ved formelen QM(R)m og fremgangsmåte for fremstilling av det samme, hvor Q er et polystyren, M er Si, C, Ge, Sn, P eller N, hver R er en hydro- karbylgruppe valgt hver for seg, under den forutset- ningen at minst en R er en syklopentadienyl-type forbindelse og m er er 2 eller 3, hvor fremgangsmå- ten omfatter det å reagere et metallisert polystyren og en organohalogenidforbindelse, hvor polystyrenet er metallisert med et alkalimetall, og hvor organo- halogenidforbindelsen er representert ved formelen XM(R)m hvor X er et halogenid. Andre sider ved oppfinnelsen omfatter et polymerbundet metallocen representert ved formelen QM(R)mZYn og en frem- gangsmåte for fremstilling av det samme, hvor Z er et overgangsmetall, Y er et halogenid, metyl, hydrogen eller en syklopentadienyl-type gruppe og n er 2 eller 3. Andre sider ved den foreliggende oppfinnelsen . omfatter et katalysatorsystem som omfatter det polymerbundne metallocenet og et organoalumin- oksan, en fremgangsmåte for fremstilling av samme og en fremgangsmåte for polymerisasjon ved anven- delse av katalysatorsystemet.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/268,425 US5473020A (en) | 1994-06-30 | 1994-06-30 | Polymer bound ligands, polymer bound metallocenes, catalyst systems, preparation, and use |
Publications (2)
Publication Number | Publication Date |
---|---|
NO952620D0 NO952620D0 (no) | 1995-06-29 |
NO952620L true NO952620L (no) | 1996-01-02 |
Family
ID=23022944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO952620A NO952620L (no) | 1994-06-30 | 1995-06-29 | Polymerbundne ligander, polymerbundne metallocener, katalysatorsystemer og fremgangsmåte til fremstilling av en polymerbundet ligand |
Country Status (17)
Country | Link |
---|---|
US (6) | US5473020A (no) |
EP (1) | EP0690076A1 (no) |
JP (1) | JPH08188611A (no) |
KR (1) | KR960000928A (no) |
CN (1) | CN1127759A (no) |
AU (1) | AU669317B2 (no) |
BG (1) | BG99755A (no) |
BR (1) | BR9503059A (no) |
CA (1) | CA2152192A1 (no) |
CZ (1) | CZ171595A3 (no) |
FI (1) | FI953234A (no) |
HU (1) | HUT73199A (no) |
NO (1) | NO952620L (no) |
PL (1) | PL309453A1 (no) |
SK (1) | SK85395A3 (no) |
TR (1) | TR199500786A2 (no) |
ZA (1) | ZA955323B (no) |
Families Citing this family (58)
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EP0705810A3 (en) * | 1994-09-22 | 1997-04-09 | Shell Int Research | Process for cleaning starting materials for metal-catalyzed reactions and cleaning agents that can be used therefor |
US5770755A (en) * | 1994-11-15 | 1998-06-23 | Phillips Petroleum Company | Process to prepare polymeric metallocenes |
DE19506553A1 (de) * | 1995-02-24 | 1996-08-29 | Basf Ag | Polymere enthaltende Katalysatorsysteme |
US5587439A (en) * | 1995-05-12 | 1996-12-24 | Quantum Chemical Corporation | Polymer supported catalyst for olefin polymerization |
US5885924A (en) * | 1995-06-07 | 1999-03-23 | W. R. Grace & Co.-Conn. | Halogenated supports and supported activators |
US5610115A (en) * | 1995-07-20 | 1997-03-11 | Samsung General Chemicals Co., Ltd. | Organic carrier supported metallocene catalyst for olefin polymerization |
US5670680A (en) * | 1996-04-26 | 1997-09-23 | The Dow Chemical Company | Method for producing octahydrofluorenyl metal complexes |
US5747404A (en) * | 1996-05-28 | 1998-05-05 | Lyondell Petrochemical Company | Polysiloxane supported metallocene catalysts |
EP0856524A1 (en) * | 1997-02-01 | 1998-08-05 | Repsol Quimica S.A. | Heterogeneous catalyst components for olefins polymerization, preparation process and use thereof |
DE19706409A1 (de) * | 1997-02-19 | 1998-08-20 | Buna Sow Leuna Olefinverb Gmbh | Verfahren und Katalysator zur Herstellung von mittel- bis ultrahochmolekularen Polyolefinen |
US6239235B1 (en) | 1997-07-15 | 2001-05-29 | Phillips Petroleum Company | High solids slurry polymerization |
JP2001525458A (ja) | 1997-12-08 | 2001-12-11 | アルベマール・コーポレーシヨン | 生産性を向上させた触媒組成物 |
US6677265B1 (en) | 1997-12-08 | 2004-01-13 | Albemarle Corporation | Process of producing self-supported catalysts |
US6551955B1 (en) | 1997-12-08 | 2003-04-22 | Albemarle Corporation | Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, and their preparation and their use |
KR100531628B1 (ko) | 1998-03-20 | 2005-11-29 | 엑손모빌 케미칼 패턴츠 인코포레이티드 | 연속적인 슬러리 중합반응의 휘발물질 제거 |
US20020111441A1 (en) | 1998-03-20 | 2002-08-15 | Kendrick James Austin | Continuous slurry polymerization volatile removal |
US7268194B2 (en) * | 1998-03-20 | 2007-09-11 | Exxonmobil Chemical Patents Inc. | Continuous slurry polymerization process and apparatus |
US6281300B1 (en) * | 1998-03-20 | 2001-08-28 | Exxon Chemical Patents, Inc. | Continuous slurry polymerization volatile removal |
US6977283B1 (en) | 1998-04-07 | 2005-12-20 | Exxonmobil Chemical Patents Inc. | Polymerization process |
US6245868B1 (en) | 1998-05-29 | 2001-06-12 | Univation Technologies | Catalyst delivery method, a catalyst feeder and their use in a polymerization process |
US7354880B2 (en) * | 1998-07-10 | 2008-04-08 | Univation Technologies, Llc | Catalyst composition and methods for its preparation and use in a polymerization process |
KR100430438B1 (ko) | 1998-10-22 | 2004-07-19 | 대림산업 주식회사 | 담지메탈로센촉매,그제조방법및이를이용한폴리올레핀의중합방법 |
US6087290A (en) * | 1999-01-19 | 2000-07-11 | Hughes Electronics Corporation | Si-N-Si-bridged metallocenes, their production and use |
US6197714B1 (en) * | 1999-03-23 | 2001-03-06 | Cryovac, Inc. | Supported catalysts and olefin polymerization processes utilizing same |
US6197715B1 (en) * | 1999-03-23 | 2001-03-06 | Cryovac, Inc. | Supported catalysts and olefin polymerization processes utilizing same |
EP1203030A4 (en) * | 1999-07-15 | 2003-08-13 | Conocophillips Co | SLUDGE DRAINAGE BY FURSCH |
US6346586B1 (en) * | 1999-10-22 | 2002-02-12 | Univation Technologies, Llc | Method for preparing a supported catalyst system and its use in a polymerization process |
US6281155B1 (en) | 1999-11-19 | 2001-08-28 | Equistar Chemicals, L.P. | Supported olefin polymerization catalysts |
KR100416471B1 (ko) * | 1999-12-30 | 2004-01-31 | 삼성아토피나주식회사 | 폴리머 중합용 신규 메탈로센 담지촉매 |
US6573412B1 (en) * | 2000-05-12 | 2003-06-03 | Bridgestone Corporation | Chain-coupled polymeric alkoxide compounds having controlled viscosity |
US7220804B1 (en) * | 2000-10-13 | 2007-05-22 | Univation Technologies, Llc | Method for preparing a catalyst system and its use in a polymerization process |
US6593267B2 (en) | 2000-12-18 | 2003-07-15 | Univation Technologies, Llc | Method for preparing a supported catalyst system and its use in a polymerization process |
US6933258B2 (en) | 2000-12-19 | 2005-08-23 | Univation Technologies, L.L.C. | Catalyst composition and methods for its preparation and use in a polymerization process |
US7084220B2 (en) * | 2003-02-05 | 2006-08-01 | Lg Chem, Ltd. | Catalyst system for preparing styrene polymer and method for preparing of styrene polymer using the same |
RU2339650C2 (ru) * | 2003-03-21 | 2008-11-27 | Дау Глобал Текнолоджиз, Инк. | Способ полимеризации олефинов с регулируемой морфологией |
US6930156B2 (en) * | 2003-10-22 | 2005-08-16 | Equistar Chemicals, Lp | Polymer bound single-site catalysts |
US20070073012A1 (en) * | 2005-09-28 | 2007-03-29 | Pannell Richard B | Method for seed bed treatment before a polymerization reaction |
US20050148742A1 (en) * | 2004-01-02 | 2005-07-07 | Hagerty Robert O. | Method for controlling sheeting in gas phase reactors |
US7985811B2 (en) * | 2004-01-02 | 2011-07-26 | Univation Technologies, Llc | Method for controlling sheeting in gas phase reactors |
CN102615734B (zh) | 2004-08-27 | 2014-07-02 | 切夫里昂菲利普化学有限责任公司 | 能量有效的聚烯烃方法 |
US7125939B2 (en) * | 2004-08-30 | 2006-10-24 | Equistar Chemicals, Lp | Olefin polymerization with polymer bound single-site catalysts |
US7629421B2 (en) * | 2005-12-21 | 2009-12-08 | Chevron Phillips Chemical Company Lp | Monomer recovery by returning column overhead liquid to the reactor |
ES2401040T3 (es) * | 2007-08-16 | 2013-04-16 | Univation Technologies, Llc | Aditivos de continuidad y su uso en procesos de polimerización |
US8012900B2 (en) * | 2007-12-28 | 2011-09-06 | Chevron Phillips Chemical Company, L.P. | Nano-linked metallocene catalyst compositions and their polymer products |
US7863210B2 (en) | 2007-12-28 | 2011-01-04 | Chevron Phillips Chemical Company Lp | Nano-linked metallocene catalyst compositions and their polymer products |
US8080681B2 (en) * | 2007-12-28 | 2011-12-20 | Chevron Phillips Chemical Company Lp | Nano-linked metallocene catalyst compositions and their polymer products |
US8206654B2 (en) | 2008-01-07 | 2012-06-26 | Univation Technologies, Llc | Catalyst feed systems and methods for using the same |
KR101698618B1 (ko) | 2009-01-08 | 2017-01-20 | 유니베이션 테크놀로지즈, 엘엘씨 | 폴리올레핀 중합 방법을 위한 첨가제 |
WO2010080871A1 (en) | 2009-01-08 | 2010-07-15 | Univation Technologies, Llc | Additive for gas phase polymerization processes |
US8205815B2 (en) * | 2009-05-15 | 2012-06-26 | Fellowes, Inc. | Paper alignment sensor arrangement |
US7919639B2 (en) * | 2009-06-23 | 2011-04-05 | Chevron Phillips Chemical Company Lp | Nano-linked heteronuclear metallocene catalyst compositions and their polymer products |
KR101678247B1 (ko) | 2009-07-28 | 2016-11-21 | 유니베이션 테크놀로지즈, 엘엘씨 | 지지된 기하학적 구속 촉매를 사용한 중합 방법 |
WO2012087560A1 (en) | 2010-12-22 | 2012-06-28 | Univation Technologies, Llc | Additive for polyolefin polymerization processes |
EP2610269A1 (en) | 2011-12-28 | 2013-07-03 | Saudi Basic Industries Corporation | Catalyst composition and method for preparing the same |
JP2016539234A (ja) | 2013-12-09 | 2016-12-15 | ユニベーション・テクノロジーズ・エルエルシー | 重合プロセスへの重合添加剤の供給 |
GB2533770B (en) | 2014-12-22 | 2021-02-10 | Norner Verdandi As | Polyethylene for pipes |
US10029230B1 (en) | 2017-01-24 | 2018-07-24 | Chevron Phillips Chemical Company Lp | Flow in a slurry loop reactor |
KR102513518B1 (ko) | 2020-12-23 | 2023-03-22 | 디엘케미칼 주식회사 | 메탈로센 올레핀 중합 공정용 대전방지제를 이용한 올레핀 중합 방법 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1268754A (en) * | 1985-06-21 | 1990-05-08 | Howard Curtis Welborn, Jr. | Supported polymerization catalyst |
US5084534A (en) * | 1987-06-04 | 1992-01-28 | Exxon Chemical Patents, Inc. | High pressure, high temperature polymerization of ethylene |
US5153157A (en) * | 1987-01-30 | 1992-10-06 | Exxon Chemical Patents Inc. | Catalyst system of enhanced productivity |
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US5155080A (en) | 1988-07-15 | 1992-10-13 | Fina Technology, Inc. | Process and catalyst for producing syndiotactic polyolefins |
DE3844282A1 (de) * | 1988-12-30 | 1990-07-05 | Hoechst Ag | Bisindenyl-derivat und verfahren zu seiner herstellung |
IT8919252A0 (it) * | 1989-01-31 | 1989-01-31 | Ilano | Catalizzatori per la polimerizzazione di olefine. |
DE59104869D1 (de) * | 1990-11-12 | 1995-04-13 | Hoechst Ag | 2-Substituierte Bisindenylmetallocene, Verfahren zu ihrer Herstellung und ihre Verwendung als Katalysatoren bei der Olefinpolymerisation. |
JP3036852B2 (ja) * | 1990-12-28 | 2000-04-24 | 三井化学株式会社 | オレフィン重合用触媒 |
US5362824A (en) * | 1991-12-13 | 1994-11-08 | Mobil Oil Corporation | Olefin polymerization catalysts |
-
1994
- 1994-06-30 US US08/268,425 patent/US5473020A/en not_active Expired - Fee Related
-
1995
- 1995-05-31 US US08/455,306 patent/US5492985A/en not_active Expired - Fee Related
- 1995-05-31 US US08/454,764 patent/US5492973A/en not_active Expired - Fee Related
- 1995-05-31 US US08/455,382 patent/US5492975A/en not_active Expired - Fee Related
- 1995-05-31 US US08/455,380 patent/US5492974A/en not_active Expired - Fee Related
- 1995-05-31 US US08/455,488 patent/US5492978A/en not_active Expired - Fee Related
- 1995-06-20 CA CA002152192A patent/CA2152192A1/en not_active Abandoned
- 1995-06-27 ZA ZA955323A patent/ZA955323B/xx unknown
- 1995-06-27 AU AU23277/95A patent/AU669317B2/en not_active Expired - Fee Related
- 1995-06-29 KR KR1019950019332A patent/KR960000928A/ko not_active Application Discontinuation
- 1995-06-29 NO NO952620A patent/NO952620L/no unknown
- 1995-06-29 EP EP95110160A patent/EP0690076A1/en not_active Withdrawn
- 1995-06-29 HU HU9501916A patent/HUT73199A/hu unknown
- 1995-06-29 BG BG99755A patent/BG99755A/bg unknown
- 1995-06-29 TR TR95/00786A patent/TR199500786A2/xx unknown
- 1995-06-29 FI FI953234A patent/FI953234A/fi not_active Application Discontinuation
- 1995-06-29 CN CN95108178A patent/CN1127759A/zh active Pending
- 1995-06-29 SK SK853-95A patent/SK85395A3/sk unknown
- 1995-06-29 CZ CZ951715A patent/CZ171595A3/cs unknown
- 1995-06-30 PL PL95309453A patent/PL309453A1/xx unknown
- 1995-06-30 BR BR9503059A patent/BR9503059A/pt not_active Application Discontinuation
- 1995-06-30 JP JP7198988A patent/JPH08188611A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
KR960000928A (ko) | 1996-01-25 |
TR199500786A2 (tr) | 1996-10-21 |
AU669317B2 (en) | 1996-05-30 |
CZ171595A3 (en) | 1996-01-17 |
US5492973A (en) | 1996-02-20 |
FI953234A0 (fi) | 1995-06-29 |
US5492975A (en) | 1996-02-20 |
FI953234A (fi) | 1995-12-31 |
US5473020A (en) | 1995-12-05 |
HU9501916D0 (en) | 1995-08-28 |
US5492974A (en) | 1996-02-20 |
CA2152192A1 (en) | 1995-12-31 |
CN1127759A (zh) | 1996-07-31 |
HUT73199A (en) | 1996-06-28 |
NO952620D0 (no) | 1995-06-29 |
PL309453A1 (en) | 1996-01-08 |
AU2327795A (en) | 1996-01-25 |
US5492985A (en) | 1996-02-20 |
BG99755A (bg) | 1996-06-28 |
ZA955323B (en) | 1996-02-13 |
JPH08188611A (ja) | 1996-07-23 |
SK85395A3 (en) | 1996-12-04 |
BR9503059A (pt) | 1996-04-23 |
US5492978A (en) | 1996-02-20 |
EP0690076A1 (en) | 1996-01-03 |
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