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| Number | Title | Issue Date |
| 8173828 | Halogen substituted heteroatom-containing metallocene compounds for olefin polymerization Halogen substituted metallocene compounds are described and comprise one or more monocyclic or polycyclic ligands that are pi-bonded to the metal atom and include at least one halogen substituent directly bonded to an sp2 carbon atom at a bondable ring po... | 05/08/2012 |
| 8143430 | Nano-linked heteronuclear metallocene catalyst compositions and their polymer products The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of ol... | 03/27/2012 |
| 8093418 | Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C3+ alpha olefins and substituted vinyl compounds, such as styrene ... | 01/10/2012 |
| 8080681 | Nano-linked metallocene catalyst compositions and their polymer products The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolym... | 12/20/2011 |
| 8071802 | Process for preparing dialkyl oxide metallocenes or diaryl oxide metallocenes Process for preparing bridged, stereorigid, stereomerically pure dialkoxide metallocenes, diaryl oxide metallocenes and diphenoxide metallocenes of formula Q(Cp)(Cp′)M(OR3)2 in which Cp and Cp′ are independently cyclopentadienyl, indenyl or fluorenyl; Q is a bri... | 12/06/2011 |
| 8058461 | Mono-indenyl transition metal compounds and polymerization therewith This invention relates to transition metal compounds, catalyst systems comprising said compounds and polymerization processes using such catalyst systems, where the transition metal compound is represented by the formula: Thi... | 11/15/2011 |
| 7928256 | Transition metal complex, catalyst composition including the same and olefin polymer using catalyst composition Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin polymer using the catalyst composition. The transition metal compl... | 04/19/2011 |
| 7919639 | Nano-linked heteronuclear metallocene catalyst compositions and their polymer products The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of ol... | 04/05/2011 |
| 7888522 | Oxygen-bridged bimetallic complex and polymerization process An oxygen-bridged bimetallic complex of the general formula (I) Cp2R1M1-O-M2R22Cp (I), wherein | 02/15/2011 |
| 7868197 | Halogen substituted heteroatom-containing metallocene compounds for olefin polymerization Halogen substituted metallocene compounds are described and comprise one or more monocyclic or polycyclic ligands that are pi-bonded to the metal atom and include at least one halogen substituent directly bonded to an sp2 carbon atom at a bondable ring po... | 01/11/2011 |
| 7834205 | Metallocene compounds A bridged metallocene compound of formula (I) wherein: M is a transition metal; X, is a hydrogen atom, a halogen atom, or a hydrocarbon group optionally containing heteroatoms; L is a divalent bridging group; R | 11/16/2010 |
| 7834204 | Fluorene derivative, transition metal compound, catalyst for olefin polymerization, and process for producing olefin polymer Provided is a transition metal compound represented by the general formula [III]: wherein R23, R24, R25, R26, R27, and R28 are each ... | 11/16/2010 |
| 7709670 | Process for producing substituted metallocene compounds for olefin polymerization A process for producing a substituted metallocene compound comprises reacting a first compound with a transfer-agent, wherein the first compound comprises a complex of a transition metal atom selected from Group 3, 4, 5 or 6 of the Periodic Table of Elements, or a l... | 05/04/2010 |
| 7678934 | Propylene copolymer, polypropylene composition and uses thereof, transition metal compound and olefin polymerization catalyst A transition metal compound represented by the following formula (2a): ... | 03/16/2010 |
| 7671226 | Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R... | 03/02/2010 |
| 7667064 | Halogen substituted metallocene compounds for olefin polymerization A metallocene compound is represented by the formula (1): AMXn-1 wherein M is a transition metal atom having a coordination number of n selected from Group 3, 4, 5 or 6 of the Periodic Table of Elements, or a lanthanide metal atom, or... | 02/23/2010 |
| 7652160 | Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one ac... | 01/26/2010 |
| 7629481 | Ansa-metallocene compound, process of preparing the same, and process of preparing polyolefin using the same Provided are a bridged metallocene compound particularly suitable for copolymerization of ethylene and alpha-olefin or cyclic olefin, a process of preparing the metallocene compound, and a process of preparing polyolefin using the metallocene compound. The bridged m... | 12/08/2009 |
| 7569713 | Hydrogenated catalyst The invention discloses a method for making a hydrogenated metallocene catalyst component comprising the steps of: 1. Providing a compound comprising at least one aromatic group; 2. Hydrogenating the at least one aromatic group in the presence of hydrogen and a hydr... | 08/04/2009 |
| 7521572 | Polymerization catalysts and process for producing bimodal polymers in a single reactor Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.... | 04/21/2009 |
| 7468452 | Process for one-pot synthesis of 1,1-diphenyl-1-(3-substituted-cyclopentadienyl)-1-(2,7-di-t-butyl-fluoren-9-yl)methane type ligands The present invention is directed to a method of making a ligand which can be used to form an ansa-metallocene. Further, the present invention is directed to a method of making the ansa-metallocene. In both methods the process steps employed to form the ligand are c... | 12/23/2008 |
| 7446216 | Halogen substituted metallocene compounds for olefin polymerization A metallocene compound is represented by the formula (1): A2YyMXn-2 wherein: M is a transition metal atom having a coordination number of n selected from Group 3, 4, 5 or 6 of the Periodic Table of E... | 11/04/2008 |
| 7439378 | Fulvene, metallocene catalysts and preparation method thereof, and preparation of polyolefines copolymer using the same The present invention relates to a novel fulvene compound and a preparation method thereof, and more particularly to a fulvene compound having substituted groups in the 2- and 5-positions, prepared from an unsaturated ketone having a substituted group in the β-posi... | 10/21/2008 |
| 7439379 | Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R... | 10/21/2008 |
| 7432336 | Catalysts for propylene copolymers The present invention relates to propylene based copolymers and to processes for producing propylene based copolymers, particularly propylene-ethylene copolymers. These unique copolymers are prepared using metallocene catalysts. ... | 10/07/2008 |
| 7405261 | Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins The present invention relates to compounds of the formula (I): where M1 is an element of group 3, 4, 5 or 6 of the Periodic Table, X are halogen, hydrogen, C | 07/29/2008 |
| 7388062 | Group IIIb metal complexes with “constrained geometry” fluorenyl based ligands The present invention discloses a metallocene catalyst component based on a Group IIIb metal of the periodic Table and a bridged heteroatom-fluorenyl ligand. It also discloses its method of preparation and its use in polymerisation. ... | 06/17/2008 |
| 7358381 | Racemoselective preparation of bridged metallocene complexes having unsubstituted or 2-substituted indenyl ligands The invention relates to a process for preparing racemic metallocene complexes by reacting transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and heating the reaction mixture obtained in this way to a temperature i... | 04/15/2008 |
| 7354979 | Polymer production at supercritical conditions This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature abov... | 04/08/2008 |
| 7342078 | Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefins A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which ... | 03/11/2008 |
| RE40121 | Transition metal compound The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins. ... | 02/26/2008 |
| 7332618 | Organometallic precursor compounds This invention relates to organometallic precursor compounds represented by the formula (H)mM(R)n wherein M is a metal or metalloid, R is the same or different and is a substituted or unsubstituted, saturated or unsaturated, heterocyclic radica... | 02/19/2008 |
| 7319083 | Polymerized catalyst composition A composition is provided that includes a product of combining, in the presence of a free radical initiator a catalyst precursor and at least one monomer wherein the monomer and the catalyst precursor are poiymerizable by free-radical polymerization and wherein the ... | 01/15/2008 |
| 7319125 | Supercritical polymerization process and polymers produced therefrom This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30 volume % of one or more solvents and from 0 to 30 mole % of one or more c... | 01/15/2008 |
| 7307177 | Metallocene complexes, their synthesis and use in catalyst systems for olefin polymerization A metallocene complex is represented by the the formula (CpR5)nMXk where Cp (each occurrence) is a cyclopentadienyl group; each of the five R substituents on the or each cyclopentadienyl grou... | 12/11/2007 |
| 7301045 | Method for preparing ester condensate The present invention provides a method for preparing ester or thioester that can conduct catalytic esterification reaction with an equimolar amount of carboxylic acid and alcohol, or catalytic thioesterification reaction with carboxylic acid and an equimolar amount... | 11/27/2007 |
| 7285513 | Preparation of catalyst systems The present invention relates to a process for preparing a catalyst for olefin polymerization which is obtainable by bringing A) at least one organic transition metal compound, B) a mixture of at least two different organo metallic compound... | 10/23/2007 |
| 7285608 | Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins A catalyst system includes a metallocene compound having the formula R9 L1 L2 M1 R1 R2 wherein R9 is a bridge between ligands L1 and L2 and M1 is a metal of... | 10/23/2007 |
| 7276567 | Heterocyclic substituted metallocene compounds for olefin polymerization This invention relates to compounds represented by formula: wherein M is a group 3, 4, 5 or 6 transition, lanthanide, or actinide metal atom; E is an indenyl ligand substituted in any po... | 10/02/2007 |
| 7273957 | Process for the production of gasoline stocks A process for the production of gasoline stocks wherein lower molecular weight olefins are first oligomerized and the oligomers then hydrogenated. In the first instance the oligomerization is carried out in a single pass fixed bed boiling point reactor. The oligomer... | 09/25/2007 |
