Patent application number | Description | Published |
20080281063 | Ethylene polymers and copolymers with high optical opacity and methods of making the same - This invention relates to the field of metal-catalyzed olefin polymerization methods and the polymers and films prepared therefrom. In one aspect, this invention provides polyethylene and ethylene/α-olefin copolymers formed in the presence of tightly-bridged metallocene catalyst, organoaluminum cocatalyst, and a chemically-treated solid oxide, and optionally in the presence of additional cocatalysts. The resins and films prepared from these polymers exhibit high haze values, low clarity values, and a low coefficient of friction. | 11-13-2008 |
20080287725 | Fulvene purification - The present invention provides a method of removing undesired isomers, including substituted cyclopentadiene regioisomers, from the desired fulvene in a crude fulvene composition by selectively reacting the undesired isomers with pyrrolidine and 4-(N,N-dimethylamino)benzaldehyde. This reaction converts the undesired substituted cyclopentadienes into fulvene-type compounds that is readily separated from the desired fulvene. | 11-20-2008 |
20090054606 | CATALYST COMPOSTIONS AND POLYOLEFINS FOR EXTRUSION COATING APPLICATIONS - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down. | 02-26-2009 |
20090088543 | Polymerization catalysts for producing polymers with low melt elasticity - The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging η | 04-02-2009 |
20090170690 | 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 copolymerization of olefins are also provided. | 07-02-2009 |
20090170691 | 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 copolymerization of olefins are also provided. | 07-02-2009 |
20090171041 | 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 copolymerization of olefins are also provided. | 07-02-2009 |
20090281342 | 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 η | 11-12-2009 |
20100029872 | ACIDIC ACTIVATOR-SUPPORTS AND CATALYSTS FOR OLEFIN POLYMERIZATION - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst composition. In one aspect, this invention encompasses precontacting a metallocene with an olefin or alkyne monomer and an organoaluminum compound, prior to contacting this mixture with the acidic activator-support. | 02-04-2010 |
20100041842 | DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS - This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η | 02-18-2010 |
20100048837 | System and method for reducing fouling in a reactor - The techniques disclosed provide a treatment method for passivating the interior surface of a polymerization reactor to minimize the formation of a polymer coating on the surface. The passivation is performed using a passivating agent that reacts with adsorbed water to form labile passivation products. Both the passivating agent and passivation products may be easily removed from the reactor prior to polymerization. Other embodiments provide a reactor system with a tank configured to automatically add a passivating agent to the reactor and processes for making polymers using a treated reactor. | 02-25-2010 |
20100048843 | CATALYST COMPOSITIONS AND POLYOLEFINS FOR EXTRUSION COATING APPLICATIONS - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down. | 02-25-2010 |
20100069582 | 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 η | 03-18-2010 |
20100160579 | PROCESS FOR PRODUCING BROADER MOLECULAR WEIGHT DISTRIBUTION POLYMERS WITH A REVERSE COMONOMER DISTRIBUTION AND LOW LEVELS OF LONG CHAIN BRANCHES - The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6. | 06-24-2010 |
20100324236 | 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 olefins are also provided. | 12-23-2010 |
20110059840 | 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 copolymerization of olefins are also provided. | 03-10-2011 |
20110144290 | 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 olefins are also provided. | 06-16-2011 |
20110201770 | DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS - This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η | 08-18-2011 |
20110257348 | CATALYST COMPOSITIONS FOR PRODUCING HIGH Mz/Mw POLYOLEFINS - The present invention provides a polymerization process utilizing a dual ansa-metallocene catalyst system. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, a non-bimodal molecular weight distribution, a ratio of Mw/Mn from about 3 to about 8, and a ratio of Mz/Mw from about 3 to about 6. | 10-20-2011 |
20110288321 | 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 copolymerization of olefins are also provided. | 11-24-2011 |
20110319575 | Catalyst Compositions and Polyolefins for Extrusion Coating Applications - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down. | 12-29-2011 |
20120058886 | 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 copolymerization of olefins are also provided. | 03-08-2012 |
20120059134 | Novel Catalyst Systems and Methods of Making and Using Same - A catalyst composition comprising (a) a first metallocene complex represented by the general formula: | 03-08-2012 |
20120077008 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A unimodal polymeric resin having a density of from about 0.946 g/ml to about 0.97 g/ml and a zero shear viscosity of from about 8×10 | 03-29-2012 |
20120077665 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A catalyst system comprising a half-sandwich chromium complex, an activator support and an optional cocatalyst. A compound of formula Cp′Cr(Cl) | 03-29-2012 |
20120108765 | POLYMERIZATION CATALYSTS FOR PRODUCING POLYMERS WITH LOW MELT ELASTICITY - The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging η | 05-03-2012 |
20120141710 | Process for Producing Broader Molecular Weight Distribution Polymers with a Reverse Comonomer Distribution and Low Levels of Long Chain Branches - The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6. | 06-07-2012 |
20120149854 | 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 olefins are also provided. | 06-14-2012 |
20120149855 | 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 copolymerization of olefins are also provided. | 06-14-2012 |
20120190803 | HALF-METALLOCENE COMPOUNDS AND CATALYST COMPOSITIONS - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 07-26-2012 |
20120190804 | DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS - This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η | 07-26-2012 |
20130035458 | High Activity Catalyst Compositions Containing Silicon-Bridged Metallocenes with Bulky Substituents - The present invention discloses catalyst compositions employing silicon-bridged metallocene compounds with bulky substituents. Methods for making these silicon-bridged metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 02-07-2013 |
20130085060 | Half-Metallocene Compounds and Catalyst Compositions - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 04-04-2013 |
20130178359 | Catalyst Compositions for Producing High Mz/Mw Polyolefins - The present invention provides a polymerization process utilizing a dual ansa-metallocene catalyst system. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, a non-bimodal molecular weight distribution, a ratio of Mw/Mn from about 3 to about 8, and a ratio of Mz/Mw from about 3 to about 6. | 07-11-2013 |
20130217842 | High Activity Catalyst Compositions Containing Silicon-Bridged Metallocenes With Bulky Substituents - The present invention discloses catalyst compositions employing silicon-bridged metallocene compounds with bulky substituents. Methods for making these silicon-bridged metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 08-22-2013 |
20130225820 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A catalyst system comprising a half-sandwich chromium complex, an activator support and an optional cocatalyst. A compound of formula Cp′Cr(Cl) | 08-29-2013 |
20130245302 | POLYMERIZATION CATALYSTS FOR PRODUCING POLYMERS WITH LOW MELT ELASTICITY - The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging η | 09-19-2013 |
20140163190 | Catalyst Compositions for Producing High Mz/Mw Polyolefins - The present invention provides a polymerization process utilizing a dual ansa-metallocene catalyst system. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, a non-bimodal molecular weight distribution, a ratio of Mw/Mn from about 3 to about 8, and a ratio of Mz/Mw from about 3 to about 6. | 06-12-2014 |
20140243491 | Half-Metallocene Compounds and Catalyst Compositions - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 08-28-2014 |
20140275462 | Radically Coupled Resins and Methods of Making and Using Same - An ethylene polymer having a density greater than about 0.930 g/ml and a level of long chain branching ranging from about 0.001 LCB/10 | 09-18-2014 |