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| Number | Title | Issue Date |
| 8084560 | Polymerization processes using metallocene catalysts, their polymer products and end uses A process for the production of an ethylene alpha-olefin copolymer is disclosed, the process including polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas ph... | 12/27/2011 |
| 8071701 | Polydentate heteroatom ligand containing metal complexes, catalysts and methods of making and using the same Metal complexes comprising certain polydentate heteroatom containing ligands, catalysts, and coordination polymerization processes employing the same are suitably employed to prepare polymers having desirable physical properties. ... | 12/06/2011 |
| 8022154 | Ethylene polymers, their production and use This invention relates to an ethylene polymer comprising ethylene and up to 5 mole % of at least one comonomer, wherein the ethylene polymer has an Mw, of 10,000 to 50,000, an Mw/Mn of between 1.5 to 4.5, a density of at least 0.925 g/cc, an unsaturation level of le... | 09/20/2011 |
| 7847040 | α-olefin-based polymer composition, molded product formed from the composition, and novel polymer A composition having excellent transparency, flexibility, rubber elasticity, thermal resistance, impact resistance, abrasion resistance and the like, a composition having excellent rigidity and impact resistance as well as excellently balanced in whitening resistanc... | 12/07/2010 |
| 7803888 | Olefin-based polymers and uses thereof A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to ... | 09/28/2010 |
| 7538168 | Halogen substituted metallocene compounds for olefin polymerization A metallocene compound comprises a transition metal and at least one substituted monocyclic or polycyclic arene ligand bonded to the transition metal, wherein said arene ligand comprises at least one halogen substituent directly bonded to an sp2 carbon at... | 05/26/2009 |
| 7514510 | Fluorenyl catalyst compositions and olefin polymerization process An olefin polymerization process comprising contacting one or more olefins and a catalyst component in a reaction zone under suitable reaction conditions to form a polyolefin, wherein the catalyst component is characterized by the formula: B(Cp)(Fl)MQ... | 04/07/2009 |
| 7514509 | Catalyst compositions and methods of forming isotactic polyproyplene Olefin polymerization processes are described herein. In one embodiment, the process generally includes introducing propylene monomer to a reaction zone, disposing an isospecific metallocene catalyst within the reaction zone, wherein the isospecific metallocene cata... | 04/07/2009 |
| 7470759 | Isotactic-atactic polypropylene and methods of making same A method of producing a polymer comprising contacting in a reaction zone under conditions suitable for polymerization of an alpha-olefin monomer with a metallocene catalyst having at least three asymmetric centers, and recovering an alpha-olefin polymer from the rea... | 12/30/2008 |
| 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 |
| 7425601 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 09/16/2008 |
| 7417103 | Isotactic 3,4-isoprene-based polymer The present invention provides 3,4-isoprene-based polymer with high regioregularity, in particular high tacticity. Specifically, the present invention provides an isoprene-based polymer, including a structural unit represented by Formula (I) in Claims, wherei... | 08/26/2008 |
| 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 |
| 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 |
| 7351465 | Polymeric based carpet Polymeric carpet and a method of making and recycling such carpet, the carpet having fibers, backing and extruded adhesive all of completely recyclable materials, the recycling being accomplished in one melting step, without a separation step. ... | 04/01/2008 |
| 7351776 | Bulk polymerization process A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, ... | 04/01/2008 |
| 7341971 | Production of olefin polymerization catalysts The invention provides a process for producing an olefin polymerization catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid catalyst particles, comprising forming a liquid/liquid emulsion system... | 03/11/2008 |
| 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 |
| 7339018 | Diene-modified propylene copolymers Certain specific embodiments of the invention will now be discussed. For example, a process of preparing a copolymer composition that includes a diene-modified polypropylene copolymer is described, which process includes: contacting a metallocene catalyst compound w... | 03/04/2008 |
| 7329418 | Pharmaceutical tablets having height greater than width An immediate release compressed pharmaceutical tablet that has two or more segments and a top and a bottom and has a height that exceeds the width of the tablet. The height is measured vertically from the top to the bottom of the tablet while it is in the tablet die... | 02/12/2008 |
| 7326756 | High temperature bulk polymerization of branched crystalline polypropylene Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of preparing branched crystalline polypropylene composition that comprises con... | 02/05/2008 |
| 7323526 | Supported metallocene-alkyl catalyst composition A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from 0.1 to 50 μm and calcined at a temperature greater than 600° C., and ... | 01/29/2008 |
| 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 |
| 7312283 | 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. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions... | 12/25/2007 |
| 7309747 | Highly flowable 1-butene polymer and process for producing the same A 1-butene polymer satisfying the following (1), (2) and either (3) or (3′): a process for producing the polymer; a resin modifier comprising the polymer; and a hot-melt adhesive containing the polymer. (1) The intrinsic viscosity [η] as measured in tetralin solv... | 12/18/2007 |
| 7307130 | Polymerization reactor operability using static charge modifier agents The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(... | 12/11/2007 |
| 7302992 | Fugitive pattern for casting A fugitive pattern for making a shell mold for investment casting a metal or alloy comprises a substantially random interpolymer and a low molecular weight polymer in proportions to provide a fugitive pattern having a combination of properties suitable for use in ma... | 12/04/2007 |
| 7302991 | Fugitive pattern for casting A fugitive pattern for making a shell mold for investment casting a metal or alloy comprises a substantially random interpolymer and a low molecular weight polymer in proportions to provide a fugitive pattern having a combination of properties suitable for use in ma... | 12/04/2007 |
| 7300988 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 11/27/2007 |
| 7291575 | Active, heterogeneous bi- or tri-dentate catalyst A catalyst composition, and olefin polymerization process using same, formed from a mixture of a non-aluminoxane aluminum compound, an inorganic oxide and a transition metal bidentate or tridentate complex in certain prescribed proportions. The composition can be fo... | 11/06/2007 |
| 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 |
| 7279609 | Method for alpha-olefin trimerization The invention concerns a method for α-olefin trimerization comprising a number of carbon atoms not less than 3, by transforming an α-olefin or a hydrocarbon mixture containing α-olefins, at temperatures ranging between 0 and 150° C. and pressures ranging between... | 10/09/2007 |
| 7279536 | Polymer production at supercritical conditions 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 above the cloud point temperatur... | 10/09/2007 |
| 7273912 | Supported olefin polymerization catalyst Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof character... | 09/25/2007 |
| 7273913 | Process for the preparation of ethylene copolymers A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and rac-stereoisomeric mixtures of metallocene compounds having general formula (I), where... | 09/25/2007 |
| 7273914 | Olefin polymerization methods Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with t... | 09/25/2007 |
| 7271231 | Polymerization of olefins Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and ... | 09/18/2007 |
| 7268243 | Bis(salicylaldiminato)titanium complex catalysts, highly syndiotactic polypropylene by a chain-end control mechanism, block copolymer containing this Bis(salicylaldiminato)titanium complex with optionally substituted phenyl or cyclohexyl on nitrogen catalyzes highly syndiospecific polymerization of propylene. Syndiotactic polypropylene with defects of the type rmr having [rrrr] content greater than 0.70 and block... | 09/11/2007 |
| 7264036 | Fugitive pattern for casting A fugitive pattern for making a shell mold for investment casting a metal or alloy comprises a substantially random interpolymer and a low molecular weight polymer in proportions to provide a fugitive pattern having a combination of properties suitable for use in ma... | 09/04/2007 |
