专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

AT283866T 未知
公开(公告)号：AT283866T
公开(公告)日：2004-12-15
申请号：AT99903958
申请日：1999-02-09
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , ALMQUIST VIDAR , PALMQVIST ULF , HOKKANEN HARRI
IPC分类号： C08F4/639 , C08F4/6392 , C08F4/659 , C08F4/6592 , C08F4/69 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16
摘要： A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with alpha-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

2. 发明专利

AU2112600A Polymer composition, a process for the production thereof and films prepared thereof 未知
公开(公告)号：AU2112600A
公开(公告)日：2000-07-24
申请号：AU2112600
申请日：2000-01-04
申请人： BOREALIS TECH OY
发明人： SKAR MERETE , MYHRE OLE-JAN , LEHTINEN ARJA , HOKKANEN HARRI , KNUUTTILA HILKKA , KALLIO KALLE , KINNUNEN ESA , SALO EIJA
IPC分类号： C08F4/659 , C08F10/02 , C08F110/02 , C08F210/16
摘要： This invention concerns process for producing polyethylene compositions, films prepared thereof and process for the preparation of the films. The process comprises subjecting ethylene, optionally hydrogen and comonomers to polymerization or copolymerization reactions in a multistage polymerization. At least one polymerization stage is conducted essentially in the absence of hydrogen. The polymerization reactions are carried out in the presence of a single-site catalyst capable of forming a composition comprising a low molecular weight component with MFR 2 of at least 10 g/10 min and a density higher than the density of the composition and a high molecular weight component. The melt flow rate of the composition is in the range MFR 2 =0.1-5.0 g/10 min and the density of the composition is 915-960 kg/m . The invention makes it possible to produce polyethylene compositions for manufacturing films with a good balance between optical and mechanical properties.

3. 发明专利

DE69922340T2 未知
公开(公告)号：DE69922340T2
公开(公告)日：2005-11-10
申请号：DE69922340
申请日：1999-02-09
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , ALMQUIST VIDAR , PALMQVIST ULF , HOKKANEN HARRI
IPC分类号： C08F4/639 , C08F4/6392 , C08F4/659 , C08F4/6592 , C08F4/69 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16
摘要： A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with alpha-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

4. 发明专利

DE69826130T2 未知
公开(公告)号：DE69826130T2
公开(公告)日：2005-09-22
申请号：DE69826130
申请日：1998-07-17
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , HOKKANEN HARRI , KALLIO KALLE , ANDELL OVE , PALMQVIST ULF
IPC分类号： C08F2/38 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16

5. 发明专利

ES2234237T3 UN CATALIZADOR PARA LA (CO)POLIMERIZACION DE ETILENO Y UN METODO PARA SU PREPARACION. 未知
公开(公告)号：ES2234237T3
公开(公告)日：2005-06-16
申请号：ES99903958
申请日：1999-02-09
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , ALMQUIST VIDAR , PALMQVIST ULF , HOKKANEN HARRI
IPC分类号： C08F4/639 , C08F4/6392 , C08F4/659 , C08F4/6592 , C08F4/69 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16
摘要： Un catalizador de óxido de cromo modificado en forma de partículas para la polimerización de etileno o etileno con -olefinas, que comprende: a) un catalizador de óxido de cromo que comprende un óxido de cromo combinado con un soporte inorgánico, en el que el cromo está principalmente en un estado de oxidación bivalente; b) un compuesto de metal de transición que comprende al menos un anillo ciclopentadienílico unido a dicho metal de transición, anillo ciclopentadienílico que puede contener heteroátomos, estar sin sustituir o sustituido, unido al metal de transición a través de un puente, opcionalmente condensado a otras estructuras de anillos sustituidos o sin sustituir, y si están presentes dos anillos de ciclopentadienilo, pueden estar unidos uno a otro a través de un puente, y c) un aluminoxano; y dicho compuesto de metal de transición y dicho aluminoxano están impregnados en dicho catalizador de óxido de cromo.

6. 发明专利

AT275586T 未知
公开(公告)号：AT275586T
公开(公告)日：2004-09-15
申请号：AT98935058
申请日：1998-07-17
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , HOKKANEN HARRI , KALLIO KALLE , ANDELL OVE , PALMQVIST ULF
IPC分类号： C08F2/38 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16

7. 发明专利

DE60005155D1 未知
公开(公告)号：DE60005155D1
公开(公告)日：2003-10-16
申请号：DE60005155
申请日：2000-01-04
申请人： BOREALIS TECH OY
发明人： SKAR MERETE , MYHRE OLE-JAN , LEHTINEN ARJA , HOKKANEN HARRI , KNUUTTILA HILKKA , KALLIO KALLE , KINNUNEN ESA , SALO EIJA
IPC分类号： C08F4/659 , C08F10/02 , C08F110/02 , C08F210/16
摘要： This invention concerns process for producing polyethylene compositions, films prepared thereof and process for the preparation of the films. The process comprises subjecting ethylene, optionally hydrogen and comonomers to polymerization or copolymerization reactions in a multistage polymerization. At least one polymerization stage is conducted essentially in the absence of hydrogen. The polymerization reactions are carried out in the presence of a single-site catalyst capable of forming a composition comprising a low molecular weight component with MFR 2 of at least 10 g/10 min and a density higher than the density of the composition and a high molecular weight component. The melt flow rate of the composition is in the range MFR 2 =0.1-5.0 g/10 min and the density of the composition is 915-960 kg/m . The invention makes it possible to produce polyethylene compositions for manufacturing films with a good balance between optical and mechanical properties.

8. 发明专利

DE69712740D1 未知
公开(公告)号：DE69712740D1
公开(公告)日：2002-06-27
申请号：DE69712740
申请日：1997-03-05
申请人： BOREALIS TECH OY
发明人： ALMQUIST VIDAR , AASTAD TONE , MELAAEN S RUM , HOKKANEN HARRI , KALLIO KALLE
IPC分类号： C08F2/00 , C08F2/34 , C08F2/38 , C08F2/42 , C08F4/00 , C08F4/16 , C08F4/22 , C08F4/64 , C08F10/00
摘要： A method of catalyst transitions in olefin polymerisations. A method for transitioning between two different catalysts in olefin polymerisations, a first catalyst and a second catalyst, comprising the steps of: a) discontinuing the feed of the first catalyst into the polymerisation reactor, and then b) introducing the second catalyst into the reactor, characterised in that the transitioning is performed between a chromium-based catalyst and a metallocene catalyst in the absence of any agent which deactivates or kills the catalyst.

9. 发明专利

AU738712B2 A catalyst for the (co)polymerisation of ethylene and a method for the preparation thereof 未知
公开(公告)号：AU738712B2
公开(公告)日：2001-09-27
申请号：AU2443099
申请日：1999-02-09
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , ALMQUIST VIDAR , PALMQVIST ULF , HOKKANEN HARRI
IPC分类号： C08F4/639 , C08F4/6392 , C08F4/659 , C08F4/6592 , C08F4/69 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16
摘要： A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with alpha-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

10. 发明专利

AU2443099A A catalyst for the (co)polymerisation of ethylene and a method for the preparation thereof 未知
公开(公告)号：AU2443099A
公开(公告)日：1999-08-23
申请号：AU2443099
申请日：1999-02-09
申请人： BOREALIS TECH OY
发明人： FOLLESTAD ARILD , ALMQUIST VIDAR , PALMQVIST ULF , HOKKANEN HARRI
IPC分类号： C08F4/639 , C08F4/6392 , C08F4/659 , C08F4/6592 , C08F4/69 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/16
摘要： A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with alpha-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式